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* tc-arm.c (do_xsc_mia, do_xsc_mar, do_xsc_mra): Renamed from
[binutils.git] / bfd / elf32-d10v.c
blob11ec052a335be4f7b61a247bd5e67f24b7c86f8a
1 /* D10V-specific support for 32-bit ELF
2 Copyright 1996, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
3 Contributed by Martin Hunt (hunt@cygnus.com).
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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/d10v.h"
26
27 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
28 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
29 static void d10v_info_to_howto_rel
30 PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
31 static asection * elf32_d10v_gc_mark_hook
32 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
33 struct elf_link_hash_entry *, Elf_Internal_Sym *));
34 static boolean elf32_d10v_gc_sweep_hook
35 PARAMS ((bfd *, struct bfd_link_info *, asection *,
36 const Elf_Internal_Rela *));
37 static boolean elf32_d10v_check_relocs
38 PARAMS ((bfd *, struct bfd_link_info *, asection *,
39 const Elf_Internal_Rela *));
40 static boolean elf32_d10v_relocate_section
41 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
42 bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *,
43 asection **));
44
45 /* Use REL instead of RELA to save space. */
46 #define USE_REL
47
48 static reloc_howto_type elf_d10v_howto_table[] =
49 {
50 /* This reloc does nothing. */
51 HOWTO (R_D10V_NONE, /* type */
52 0, /* rightshift */
53 2, /* size (0 = byte, 1 = short, 2 = long) */
54 32, /* bitsize */
55 false, /* pc_relative */
56 0, /* bitpos */
57 complain_overflow_dont, /* complain_on_overflow */
58 bfd_elf_generic_reloc, /* special_function */
59 "R_D10V_NONE", /* name */
60 false, /* partial_inplace */
61 0, /* src_mask */
62 0, /* dst_mask */
63 false), /* pcrel_offset */
64
65 /* An PC Relative 10-bit relocation, shifted by 2 */
66 /* right container */
67 HOWTO (R_D10V_10_PCREL_R, /* type */
68 2, /* rightshift */
69 2, /* size (0 = byte, 1 = short, 2 = long) */
70 8, /* bitsize */
71 true, /* pc_relative */
72 0, /* bitpos */
73 complain_overflow_signed, /* complain_on_overflow */
74 bfd_elf_generic_reloc, /* special_function */
75 "R_D10V_10_PCREL_R", /* name */
76 false, /* partial_inplace */
77 0xff, /* src_mask */
78 0xff, /* dst_mask */
79 true), /* pcrel_offset */
80
81 /* An PC Relative 10-bit relocation, shifted by 2 */
82 /* left container */
83 HOWTO (R_D10V_10_PCREL_L, /* type */
84 2, /* rightshift */
85 2, /* size (0 = byte, 1 = short, 2 = long) */
86 8, /* bitsize */
87 true, /* pc_relative */
88 15, /* bitpos */
89 complain_overflow_signed, /* complain_on_overflow */
90 bfd_elf_generic_reloc, /* special_function */
91 "R_D10V_10_PCREL_L", /* name */
92 false, /* partial_inplace */
93 0x07f8000, /* src_mask */
94 0x07f8000, /* dst_mask */
95 true), /* pcrel_offset */
96
97 /* A 16 bit absolute relocation */
98 HOWTO (R_D10V_16, /* type */
99 0, /* rightshift */
100 1, /* size (0 = byte, 1 = short, 2 = long) */
101 16, /* bitsize */
102 false, /* pc_relative */
103 0, /* bitpos */
104 complain_overflow_dont, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_D10V_16", /* name */
107 false, /* partial_inplace */
108 0xffff, /* src_mask */
109 0xffff, /* dst_mask */
110 false), /* pcrel_offset */
111
112 /* An 18 bit absolute relocation, right shifted 2 */
113 HOWTO (R_D10V_18, /* type */
114 2, /* rightshift */
115 1, /* size (0 = byte, 1 = short, 2 = long) */
116 16, /* bitsize */
117 false, /* pc_relative */
118 0, /* bitpos */
119 complain_overflow_dont, /* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_D10V_18", /* name */
122 false, /* partial_inplace */
123 0xffff, /* src_mask */
124 0xffff, /* dst_mask */
125 false), /* pcrel_offset */
126
127 /* A relative 18 bit relocation, right shifted by 2 */
128 HOWTO (R_D10V_18_PCREL, /* type */
129 2, /* rightshift */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
131 16, /* bitsize */
132 true, /* pc_relative */
133 0, /* bitpos */
134 complain_overflow_signed, /* complain_on_overflow */
135 bfd_elf_generic_reloc, /* special_function */
136 "R_D10V_18_PCREL", /* name */
137 false, /* partial_inplace */
138 0xffff, /* src_mask */
139 0xffff, /* dst_mask */
140 true), /* pcrel_offset */
141
142 /* A 32 bit absolute relocation */
143 HOWTO (R_D10V_32, /* type */
144 0, /* rightshift */
145 2, /* size (0 = byte, 1 = short, 2 = long) */
146 32, /* bitsize */
147 false, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_dont, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_D10V_32", /* name */
152 false, /* partial_inplace */
153 0xffffffff, /* src_mask */
154 0xffffffff, /* dst_mask */
155 false), /* pcrel_offset */
156
157 /* GNU extension to record C++ vtable hierarchy */
158 HOWTO (R_D10V_GNU_VTINHERIT, /* type */
159 0, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 0, /* bitsize */
162 false, /* pc_relative */
163 0, /* bitpos */
164 complain_overflow_dont, /* complain_on_overflow */
165 NULL, /* special_function */
166 "R_D10V_GNU_VTINHERIT", /* name */
167 false, /* partial_inplace */
168 0, /* src_mask */
169 0, /* dst_mask */
170 false), /* pcrel_offset */
171
172 /* GNU extension to record C++ vtable member usage */
173 HOWTO (R_D10V_GNU_VTENTRY, /* type */
174 0, /* rightshift */
175 2, /* size (0 = byte, 1 = short, 2 = long) */
176 0, /* bitsize */
177 false, /* pc_relative */
178 0, /* bitpos */
179 complain_overflow_dont, /* complain_on_overflow */
180 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
181 "R_D10V_GNU_VTENTRY", /* name */
182 false, /* partial_inplace */
183 0, /* src_mask */
184 0, /* dst_mask */
185 false), /* pcrel_offset */
186 };
187
188 /* Map BFD reloc types to D10V ELF reloc types. */
189
190 struct d10v_reloc_map
191 {
192 bfd_reloc_code_real_type bfd_reloc_val;
193 unsigned char elf_reloc_val;
194 };
195
196 static const struct d10v_reloc_map d10v_reloc_map[] =
197 {
198 { BFD_RELOC_NONE, R_D10V_NONE, },
199 { BFD_RELOC_D10V_10_PCREL_R, R_D10V_10_PCREL_R },
200 { BFD_RELOC_D10V_10_PCREL_L, R_D10V_10_PCREL_L },
201 { BFD_RELOC_16, R_D10V_16 },
202 { BFD_RELOC_D10V_18, R_D10V_18 },
203 { BFD_RELOC_D10V_18_PCREL, R_D10V_18_PCREL },
204 { BFD_RELOC_32, R_D10V_32 },
205 { BFD_RELOC_VTABLE_INHERIT, R_D10V_GNU_VTINHERIT },
206 { BFD_RELOC_VTABLE_ENTRY, R_D10V_GNU_VTENTRY },
207 };
208
209 static reloc_howto_type *
210 bfd_elf32_bfd_reloc_type_lookup (abfd, code)
211 bfd *abfd ATTRIBUTE_UNUSED;
212 bfd_reloc_code_real_type code;
213 {
214 unsigned int i;
215
216 for (i = 0;
217 i < sizeof (d10v_reloc_map) / sizeof (struct d10v_reloc_map);
218 i++)
219 {
220 if (d10v_reloc_map[i].bfd_reloc_val == code)
221 return &elf_d10v_howto_table[d10v_reloc_map[i].elf_reloc_val];
222 }
223
224 return NULL;
225 }
226
227 /* Set the howto pointer for an D10V ELF reloc. */
228
229 static void
230 d10v_info_to_howto_rel (abfd, cache_ptr, dst)
231 bfd *abfd ATTRIBUTE_UNUSED;
232 arelent *cache_ptr;
233 Elf32_Internal_Rel *dst;
234 {
235 unsigned int r_type;
236
237 r_type = ELF32_R_TYPE (dst->r_info);
238 BFD_ASSERT (r_type < (unsigned int) R_D10V_max);
239 cache_ptr->howto = &elf_d10v_howto_table[r_type];
240 }
241
242 static asection *
243 elf32_d10v_gc_mark_hook (abfd, info, rel, h, sym)
244 bfd *abfd;
245 struct bfd_link_info *info ATTRIBUTE_UNUSED;
246 Elf_Internal_Rela *rel;
247 struct elf_link_hash_entry *h;
248 Elf_Internal_Sym *sym;
249 {
250 if (h != NULL)
251 {
252 switch (ELF32_R_TYPE (rel->r_info))
253 {
254 case R_D10V_GNU_VTINHERIT:
255 case R_D10V_GNU_VTENTRY:
256 break;
257
258 default:
259 switch (h->root.type)
260 {
261 case bfd_link_hash_defined:
262 case bfd_link_hash_defweak:
263 return h->root.u.def.section;
264
265 case bfd_link_hash_common:
266 return h->root.u.c.p->section;
267
268 default:
269 break;
270 }
271 }
272 }
273 else
274 {
275 return bfd_section_from_elf_index (abfd, sym->st_shndx);
276 }
277 return NULL;
278 }
279
280 static boolean
281 elf32_d10v_gc_sweep_hook (abfd, info, sec, relocs)
282 bfd *abfd ATTRIBUTE_UNUSED;
283 struct bfd_link_info *info ATTRIBUTE_UNUSED;
284 asection *sec ATTRIBUTE_UNUSED;
285 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
286 {
287 /* we don't use got and plt entries for d10v */
288 return true;
289 }
290
291 /* Look through the relocs for a section during the first phase.
292 Since we don't do .gots or .plts, we just need to consider the
293 virtual table relocs for gc. */
294
295 static boolean
296 elf32_d10v_check_relocs (abfd, info, sec, relocs)
297 bfd *abfd;
298 struct bfd_link_info *info;
299 asection *sec;
300 const Elf_Internal_Rela *relocs;
301 {
302 Elf_Internal_Shdr *symtab_hdr;
303 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
304 const Elf_Internal_Rela *rel;
305 const Elf_Internal_Rela *rel_end;
306
307 if (info->relocateable)
308 return true;
309
310 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
311 sym_hashes = elf_sym_hashes (abfd);
312 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
313 if (!elf_bad_symtab (abfd))
314 sym_hashes_end -= symtab_hdr->sh_info;
315
316 rel_end = relocs + sec->reloc_count;
317 for (rel = relocs; rel < rel_end; rel++)
318 {
319 struct elf_link_hash_entry *h;
320 unsigned long r_symndx;
321
322 r_symndx = ELF32_R_SYM (rel->r_info);
323 if (r_symndx < symtab_hdr->sh_info)
324 h = NULL;
325 else
326 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
327
328 switch (ELF32_R_TYPE (rel->r_info))
329 {
330 /* This relocation describes the C++ object vtable hierarchy.
331 Reconstruct it for later use during GC. */
332 case R_D10V_GNU_VTINHERIT:
333 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
334 return false;
335 break;
336
337 /* This relocation describes which C++ vtable entries are actually
338 used. Record for later use during GC. */
339 case R_D10V_GNU_VTENTRY:
340 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
341 return false;
342 break;
343 }
344 }
345
346 return true;
347 }
348
349 /* Relocate a D10V ELF section. */
350 static boolean
351 elf32_d10v_relocate_section (output_bfd, info, input_bfd, input_section,
352 contents, relocs, local_syms, local_sections)
353 bfd *output_bfd;
354 struct bfd_link_info *info;
355 bfd *input_bfd;
356 asection *input_section;
357 bfd_byte *contents;
358 Elf_Internal_Rela *relocs;
359 Elf_Internal_Sym *local_syms;
360 asection **local_sections;
361 {
362 Elf_Internal_Shdr *symtab_hdr;
363 struct elf_link_hash_entry **sym_hashes;
364 Elf_Internal_Rela *rel, *relend;
365 const char *name;
366
367 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
368 sym_hashes = elf_sym_hashes (input_bfd);
369
370 rel = relocs;
371 relend = relocs + input_section->reloc_count;
372 for (; rel < relend; rel++)
373 {
374 int r_type;
375 reloc_howto_type *howto;
376 unsigned long r_symndx;
377 Elf_Internal_Sym *sym;
378 asection *sec;
379 struct elf_link_hash_entry *h;
380 bfd_vma relocation;
381 bfd_reloc_status_type r;
382
383 r_symndx = ELF32_R_SYM (rel->r_info);
384 r_type = ELF32_R_TYPE (rel->r_info);
385
386 if (r_type == R_D10V_GNU_VTENTRY
387 || r_type == R_D10V_GNU_VTINHERIT )
388 continue;
389
390 howto = elf_d10v_howto_table + r_type;
391
392 if (info->relocateable)
393 {
394 /* This is a relocateable link. We don't have to change
395 anything, unless the reloc is against a section symbol,
396 in which case we have to adjust according to where the
397 section symbol winds up in the output section. */
398 if (r_symndx < symtab_hdr->sh_info)
399 {
400 sym = local_syms + r_symndx;
401 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
402 {
403 sec = local_sections[r_symndx];
404 rel->r_addend += sec->output_offset + sym->st_value;
405 }
406 }
407
408 continue;
409 }
410
411 /* This is a final link. */
412 h = NULL;
413 sym = NULL;
414 sec = NULL;
415 if (r_symndx < symtab_hdr->sh_info)
416 {
417 sym = local_syms + r_symndx;
418 sec = local_sections[r_symndx];
419 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
420 }
421 else
422 {
423 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
424 while (h->root.type == bfd_link_hash_indirect
425 || h->root.type == bfd_link_hash_warning)
426 h = (struct elf_link_hash_entry *) h->root.u.i.link;
427 if (h->root.type == bfd_link_hash_defined
428 || h->root.type == bfd_link_hash_defweak)
429 {
430 sec = h->root.u.def.section;
431 relocation = (h->root.u.def.value
432 + sec->output_section->vma
433 + sec->output_offset);
434 }
435 else if (h->root.type == bfd_link_hash_undefweak)
436 relocation = 0;
437 else
438 {
439 if (!((*info->callbacks->undefined_symbol)
440 (info, h->root.root.string, input_bfd,
441 input_section, rel->r_offset, true)))
442 return false;
443 relocation = 0;
444 }
445 }
446
447 if (h != NULL)
448 name = h->root.root.string;
449 else
450 {
451 name = (bfd_elf_string_from_elf_section
452 (input_bfd, symtab_hdr->sh_link, sym->st_name));
453 if (name == NULL || *name == '\0')
454 name = bfd_section_name (input_bfd, sec);
455 }
456
457 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
458 contents, rel->r_offset,
459 relocation, rel->r_addend);
460
461 if (r != bfd_reloc_ok)
462 {
463 const char * msg = (const char *) 0;
464
465 switch (r)
466 {
467 case bfd_reloc_overflow:
468 if (!((*info->callbacks->reloc_overflow)
469 (info, name, howto->name, (bfd_vma) 0,
470 input_bfd, input_section, rel->r_offset)))
471 return false;
472 break;
473
474 case bfd_reloc_undefined:
475 if (!((*info->callbacks->undefined_symbol)
476 (info, name, input_bfd, input_section,
477 rel->r_offset, true)))
478 return false;
479 break;
480
481 case bfd_reloc_outofrange:
482 msg = _ ("internal error: out of range error");
483 goto common_error;
484
485 case bfd_reloc_notsupported:
486 msg = _ ("internal error: unsupported relocation error");
487 goto common_error;
488
489 case bfd_reloc_dangerous:
490 msg = _ ("internal error: dangerous error");
491 goto common_error;
492
493 default:
494 msg = _ ("internal error: unknown error");
495 /* fall through */
496
497 common_error:
498 if (!((*info->callbacks->warning)
499 (info, msg, name, input_bfd, input_section,
500 rel->r_offset)))
501 return false;
502 break;
503 }
504 }
505 }
506
507 return true;
508 }
509 #define ELF_ARCH bfd_arch_d10v
510 #define ELF_MACHINE_CODE EM_D10V
511 #define ELF_MACHINE_ALT1 EM_CYGNUS_D10V
512 #define ELF_MAXPAGESIZE 0x1000
513
514 #define TARGET_BIG_SYM bfd_elf32_d10v_vec
515 #define TARGET_BIG_NAME "elf32-d10v"
516
517 #define elf_info_to_howto 0
518 #define elf_info_to_howto_rel d10v_info_to_howto_rel
519 #define elf_backend_object_p 0
520 #define elf_backend_final_write_processing 0
521 #define elf_backend_gc_mark_hook elf32_d10v_gc_mark_hook
522 #define elf_backend_gc_sweep_hook elf32_d10v_gc_sweep_hook
523 #define elf_backend_check_relocs elf32_d10v_check_relocs
524 #define elf_backend_relocate_section elf32_d10v_relocate_section
525 #define elf_backend_can_gc_sections 1
526
527 #include "elf32-target.h"
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