Commit | Line | Data |
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252b5132 | 1 | /* D10V-specific support for 32-bit ELF |
7898deda | 2 | Copyright 1996, 1998, 1999, 2000 Free Software Foundation, Inc. |
252b5132 RH |
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" | |
1b452ec6 | 25 | #include "elf/d10v.h" |
252b5132 RH |
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 | ||
252b5132 RH |
32 | /* Use REL instead of RELA to save space */ |
33 | #define USE_REL | |
34 | ||
252b5132 RH |
35 | static reloc_howto_type elf_d10v_howto_table[] = |
36 | { | |
37 | /* This reloc does nothing. */ | |
38 | HOWTO (R_D10V_NONE, /* type */ | |
39 | 0, /* rightshift */ | |
40 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
41 | 32, /* bitsize */ | |
42 | false, /* pc_relative */ | |
43 | 0, /* bitpos */ | |
44 | complain_overflow_bitfield, /* complain_on_overflow */ | |
45 | bfd_elf_generic_reloc, /* special_function */ | |
46 | "R_D10V_NONE", /* name */ | |
47 | false, /* partial_inplace */ | |
48 | 0, /* src_mask */ | |
49 | 0, /* dst_mask */ | |
50 | false), /* pcrel_offset */ | |
51 | ||
52 | /* An PC Relative 10-bit relocation, shifted by 2 */ | |
53 | /* right container */ | |
54 | HOWTO (R_D10V_10_PCREL_R, /* type */ | |
55 | 2, /* rightshift */ | |
56 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
57 | 10, /* bitsize */ | |
58 | true, /* pc_relative */ | |
59 | 0, /* bitpos */ | |
60 | complain_overflow_bitfield, /* complain_on_overflow */ | |
61 | bfd_elf_generic_reloc, /* special_function */ | |
62 | "R_D10V_10_PCREL_R", /* name */ | |
63 | false, /* partial_inplace */ | |
64 | 0xff, /* src_mask */ | |
65 | 0xff, /* dst_mask */ | |
66 | true), /* pcrel_offset */ | |
67 | ||
68 | /* An PC Relative 10-bit relocation, shifted by 2 */ | |
69 | /* left container */ | |
70 | HOWTO (R_D10V_10_PCREL_L, /* type */ | |
71 | 2, /* rightshift */ | |
72 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
73 | 10, /* bitsize */ | |
74 | true, /* pc_relative */ | |
75 | 15, /* bitpos */ | |
76 | complain_overflow_bitfield, /* complain_on_overflow */ | |
77 | bfd_elf_generic_reloc, /* special_function */ | |
78 | "R_D10V_10_PCREL_L", /* name */ | |
79 | false, /* partial_inplace */ | |
80 | 0x07f8000, /* src_mask */ | |
81 | 0x07f8000, /* dst_mask */ | |
82 | true), /* pcrel_offset */ | |
83 | ||
84 | /* A 16 bit absolute relocation */ | |
85 | HOWTO (R_D10V_16, /* type */ | |
86 | 0, /* rightshift */ | |
87 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
88 | 16, /* bitsize */ | |
89 | false, /* pc_relative */ | |
90 | 0, /* bitpos */ | |
91 | complain_overflow_dont, /* complain_on_overflow */ | |
92 | bfd_elf_generic_reloc, /* special_function */ | |
93 | "R_D10V_16", /* name */ | |
94 | false, /* partial_inplace */ | |
95 | 0xffff, /* src_mask */ | |
96 | 0xffff, /* dst_mask */ | |
97 | false), /* pcrel_offset */ | |
98 | ||
99 | /* An 18 bit absolute relocation, right shifted 2 */ | |
100 | HOWTO (R_D10V_18, /* type */ | |
101 | 2, /* rightshift */ | |
102 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
103 | 18, /* bitsize */ | |
104 | false, /* pc_relative */ | |
105 | 0, /* bitpos */ | |
106 | complain_overflow_dont, /* complain_on_overflow */ | |
107 | bfd_elf_generic_reloc, /* special_function */ | |
108 | "R_D10V_18", /* name */ | |
109 | false, /* partial_inplace */ | |
110 | 0xffff, /* src_mask */ | |
111 | 0xffff, /* dst_mask */ | |
112 | false), /* pcrel_offset */ | |
113 | ||
114 | /* A relative 18 bit relocation, right shifted by 2 */ | |
115 | HOWTO (R_D10V_18_PCREL, /* type */ | |
116 | 2, /* rightshift */ | |
117 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
118 | 18, /* bitsize */ | |
119 | true, /* pc_relative */ | |
120 | 0, /* bitpos */ | |
121 | complain_overflow_signed, /* complain_on_overflow */ | |
122 | bfd_elf_generic_reloc, /* special_function */ | |
123 | "R_D10V_18_PCREL", /* name */ | |
124 | false, /* partial_inplace */ | |
125 | 0xffff, /* src_mask */ | |
126 | 0xffff, /* dst_mask */ | |
127 | true), /* pcrel_offset */ | |
128 | ||
129 | /* A 32 bit absolute relocation */ | |
130 | HOWTO (R_D10V_32, /* type */ | |
131 | 0, /* rightshift */ | |
132 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
133 | 32, /* bitsize */ | |
134 | false, /* pc_relative */ | |
135 | 0, /* bitpos */ | |
136 | complain_overflow_bitfield, /* complain_on_overflow */ | |
137 | bfd_elf_generic_reloc, /* special_function */ | |
138 | "R_D10V_32", /* name */ | |
139 | false, /* partial_inplace */ | |
140 | 0xffffffff, /* src_mask */ | |
141 | 0xffffffff, /* dst_mask */ | |
142 | false), /* pcrel_offset */ | |
143 | ||
144 | /* GNU extension to record C++ vtable hierarchy */ | |
145 | HOWTO (R_D10V_GNU_VTINHERIT, /* type */ | |
146 | 0, /* rightshift */ | |
147 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
148 | 0, /* bitsize */ | |
149 | false, /* pc_relative */ | |
150 | 0, /* bitpos */ | |
151 | complain_overflow_dont, /* complain_on_overflow */ | |
152 | NULL, /* special_function */ | |
153 | "R_D10V_GNU_VTINHERIT", /* name */ | |
154 | false, /* partial_inplace */ | |
155 | 0, /* src_mask */ | |
156 | 0, /* dst_mask */ | |
157 | false), /* pcrel_offset */ | |
158 | ||
159 | /* GNU extension to record C++ vtable member usage */ | |
160 | HOWTO (R_D10V_GNU_VTENTRY, /* type */ | |
161 | 0, /* rightshift */ | |
162 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
163 | 0, /* bitsize */ | |
164 | false, /* pc_relative */ | |
165 | 0, /* bitpos */ | |
166 | complain_overflow_dont, /* complain_on_overflow */ | |
167 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
168 | "R_D10V_GNU_VTENTRY", /* name */ | |
169 | false, /* partial_inplace */ | |
170 | 0, /* src_mask */ | |
171 | 0, /* dst_mask */ | |
172 | false), /* pcrel_offset */ | |
a7c10850 | 173 | |
252b5132 RH |
174 | }; |
175 | ||
176 | /* Map BFD reloc types to D10V ELF reloc types. */ | |
177 | ||
178 | struct d10v_reloc_map | |
179 | { | |
180 | bfd_reloc_code_real_type bfd_reloc_val; | |
181 | unsigned char elf_reloc_val; | |
182 | }; | |
183 | ||
184 | static const struct d10v_reloc_map d10v_reloc_map[] = | |
185 | { | |
186 | { BFD_RELOC_NONE, R_D10V_NONE, }, | |
187 | { BFD_RELOC_D10V_10_PCREL_R, R_D10V_10_PCREL_R }, | |
188 | { BFD_RELOC_D10V_10_PCREL_L, R_D10V_10_PCREL_L }, | |
189 | { BFD_RELOC_16, R_D10V_16 }, | |
190 | { BFD_RELOC_D10V_18, R_D10V_18 }, | |
191 | { BFD_RELOC_D10V_18_PCREL, R_D10V_18_PCREL }, | |
192 | { BFD_RELOC_32, R_D10V_32 }, | |
193 | { BFD_RELOC_VTABLE_INHERIT, R_D10V_GNU_VTINHERIT }, | |
194 | { BFD_RELOC_VTABLE_ENTRY, R_D10V_GNU_VTENTRY }, | |
195 | }; | |
196 | ||
197 | static reloc_howto_type * | |
198 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) | |
5f771d47 | 199 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
200 | bfd_reloc_code_real_type code; |
201 | { | |
202 | unsigned int i; | |
203 | ||
204 | for (i = 0; | |
205 | i < sizeof (d10v_reloc_map) / sizeof (struct d10v_reloc_map); | |
206 | i++) | |
207 | { | |
208 | if (d10v_reloc_map[i].bfd_reloc_val == code) | |
209 | return &elf_d10v_howto_table[d10v_reloc_map[i].elf_reloc_val]; | |
210 | } | |
211 | ||
212 | return NULL; | |
213 | } | |
214 | ||
215 | /* Set the howto pointer for an D10V ELF reloc. */ | |
216 | ||
217 | static void | |
218 | d10v_info_to_howto_rel (abfd, cache_ptr, dst) | |
5f771d47 | 219 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
220 | arelent *cache_ptr; |
221 | Elf32_Internal_Rel *dst; | |
222 | { | |
223 | unsigned int r_type; | |
224 | ||
225 | r_type = ELF32_R_TYPE (dst->r_info); | |
226 | BFD_ASSERT (r_type < (unsigned int) R_D10V_max); | |
227 | cache_ptr->howto = &elf_d10v_howto_table[r_type]; | |
228 | } | |
229 | ||
230 | static asection * | |
231 | elf32_d10v_gc_mark_hook (abfd, info, rel, h, sym) | |
232 | bfd *abfd; | |
5f771d47 | 233 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
234 | Elf_Internal_Rela *rel; |
235 | struct elf_link_hash_entry *h; | |
236 | Elf_Internal_Sym *sym; | |
237 | { | |
238 | if (h != NULL) | |
239 | { | |
240 | switch (ELF32_R_TYPE (rel->r_info)) | |
241 | { | |
242 | case R_D10V_GNU_VTINHERIT: | |
243 | case R_D10V_GNU_VTENTRY: | |
244 | break; | |
245 | ||
246 | default: | |
247 | switch (h->root.type) | |
248 | { | |
249 | case bfd_link_hash_defined: | |
250 | case bfd_link_hash_defweak: | |
251 | return h->root.u.def.section; | |
252 | ||
253 | case bfd_link_hash_common: | |
254 | return h->root.u.c.p->section; | |
e049a0de ILT |
255 | |
256 | default: | |
257 | break; | |
252b5132 RH |
258 | } |
259 | } | |
260 | } | |
261 | else | |
262 | { | |
263 | if (!(elf_bad_symtab (abfd) | |
264 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
265 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
266 | && sym->st_shndx != SHN_COMMON)) | |
267 | { | |
268 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
269 | } | |
270 | } | |
271 | return NULL; | |
272 | } | |
273 | ||
274 | static boolean | |
275 | elf32_d10v_gc_sweep_hook (abfd, info, sec, relocs) | |
5f771d47 ILT |
276 | bfd *abfd ATTRIBUTE_UNUSED; |
277 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
278 | asection *sec ATTRIBUTE_UNUSED; | |
279 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; | |
252b5132 RH |
280 | { |
281 | /* we don't use got and plt entries for d10v */ | |
282 | return true; | |
283 | } | |
284 | ||
285 | /* Look through the relocs for a section during the first phase. | |
286 | Since we don't do .gots or .plts, we just need to consider the | |
287 | virtual table relocs for gc. */ | |
a7c10850 | 288 | |
252b5132 RH |
289 | static boolean |
290 | elf32_d10v_check_relocs (abfd, info, sec, relocs) | |
291 | bfd *abfd; | |
292 | struct bfd_link_info *info; | |
293 | asection *sec; | |
294 | const Elf_Internal_Rela *relocs; | |
295 | { | |
296 | Elf_Internal_Shdr *symtab_hdr; | |
297 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
298 | const Elf_Internal_Rela *rel; | |
299 | const Elf_Internal_Rela *rel_end; | |
a7c10850 | 300 | |
252b5132 RH |
301 | if (info->relocateable) |
302 | return true; | |
a7c10850 | 303 | |
252b5132 RH |
304 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
305 | sym_hashes = elf_sym_hashes (abfd); | |
a7c10850 | 306 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); |
252b5132 RH |
307 | if (!elf_bad_symtab (abfd)) |
308 | sym_hashes_end -= symtab_hdr->sh_info; | |
a7c10850 | 309 | |
252b5132 RH |
310 | rel_end = relocs + sec->reloc_count; |
311 | for (rel = relocs; rel < rel_end; rel++) | |
312 | { | |
313 | struct elf_link_hash_entry *h; | |
314 | unsigned long r_symndx; | |
a7c10850 | 315 | |
252b5132 RH |
316 | r_symndx = ELF32_R_SYM (rel->r_info); |
317 | if (r_symndx < symtab_hdr->sh_info) | |
318 | h = NULL; | |
319 | else | |
320 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
a7c10850 | 321 | |
252b5132 RH |
322 | switch (ELF32_R_TYPE (rel->r_info)) |
323 | { | |
324 | /* This relocation describes the C++ object vtable hierarchy. | |
325 | Reconstruct it for later use during GC. */ | |
326 | case R_D10V_GNU_VTINHERIT: | |
327 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
328 | return false; | |
329 | break; | |
a7c10850 | 330 | |
252b5132 RH |
331 | /* This relocation describes which C++ vtable entries are actually |
332 | used. Record for later use during GC. */ | |
333 | case R_D10V_GNU_VTENTRY: | |
334 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
335 | return false; | |
336 | break; | |
337 | } | |
338 | } | |
a7c10850 | 339 | |
252b5132 RH |
340 | return true; |
341 | } | |
342 | ||
343 | /* Relocate a D10V ELF section. */ | |
344 | static boolean | |
345 | elf32_d10v_relocate_section (output_bfd, info, input_bfd, input_section, | |
346 | contents, relocs, local_syms, local_sections) | |
5f771d47 | 347 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
348 | struct bfd_link_info *info; |
349 | bfd *input_bfd; | |
350 | asection *input_section; | |
351 | bfd_byte *contents; | |
352 | Elf_Internal_Rela *relocs; | |
353 | Elf_Internal_Sym *local_syms; | |
354 | asection **local_sections; | |
355 | { | |
356 | Elf_Internal_Shdr *symtab_hdr; | |
357 | struct elf_link_hash_entry **sym_hashes; | |
358 | Elf_Internal_Rela *rel, *relend; | |
359 | const char *name; | |
360 | ||
361 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
362 | sym_hashes = elf_sym_hashes (input_bfd); | |
363 | ||
364 | rel = relocs; | |
365 | relend = relocs + input_section->reloc_count; | |
366 | for (; rel < relend; rel++) | |
367 | { | |
368 | int r_type; | |
369 | reloc_howto_type *howto; | |
370 | unsigned long r_symndx; | |
371 | Elf_Internal_Sym *sym; | |
372 | asection *sec; | |
373 | struct elf_link_hash_entry *h; | |
374 | bfd_vma relocation; | |
375 | bfd_reloc_status_type r; | |
376 | ||
377 | r_symndx = ELF32_R_SYM (rel->r_info); | |
378 | r_type = ELF32_R_TYPE (rel->r_info); | |
379 | ||
380 | if (r_type == R_D10V_GNU_VTENTRY | |
381 | || r_type == R_D10V_GNU_VTINHERIT ) | |
382 | continue; | |
383 | ||
384 | howto = elf_d10v_howto_table + r_type; | |
385 | ||
386 | if (info->relocateable) | |
387 | { | |
388 | /* This is a relocateable link. We don't have to change | |
389 | anything, unless the reloc is against a section symbol, | |
390 | in which case we have to adjust according to where the | |
391 | section symbol winds up in the output section. */ | |
392 | if (r_symndx < symtab_hdr->sh_info) | |
393 | { | |
394 | sym = local_syms + r_symndx; | |
395 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
396 | { | |
397 | sec = local_sections[r_symndx]; | |
398 | rel->r_addend += sec->output_offset + sym->st_value; | |
399 | } | |
400 | } | |
401 | ||
402 | continue; | |
403 | } | |
404 | ||
405 | /* This is a final link. */ | |
406 | h = NULL; | |
407 | sym = NULL; | |
408 | sec = NULL; | |
409 | if (r_symndx < symtab_hdr->sh_info) | |
410 | { | |
411 | sym = local_syms + r_symndx; | |
412 | sec = local_sections[r_symndx]; | |
413 | relocation = (sec->output_section->vma | |
414 | + sec->output_offset | |
415 | + sym->st_value); | |
416 | } | |
417 | else | |
418 | { | |
419 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
420 | while (h->root.type == bfd_link_hash_indirect | |
421 | || h->root.type == bfd_link_hash_warning) | |
422 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
423 | if (h->root.type == bfd_link_hash_defined | |
424 | || h->root.type == bfd_link_hash_defweak) | |
425 | { | |
426 | sec = h->root.u.def.section; | |
427 | relocation = (h->root.u.def.value | |
428 | + sec->output_section->vma | |
429 | + sec->output_offset); | |
430 | } | |
431 | else if (h->root.type == bfd_link_hash_undefweak) | |
432 | relocation = 0; | |
433 | else | |
434 | { | |
435 | if (!((*info->callbacks->undefined_symbol) | |
436 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 437 | input_section, rel->r_offset, true))) |
252b5132 RH |
438 | return false; |
439 | relocation = 0; | |
440 | } | |
441 | } | |
442 | ||
443 | if (h != NULL) | |
444 | name = h->root.root.string; | |
445 | else | |
446 | { | |
447 | name = (bfd_elf_string_from_elf_section | |
448 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
449 | if (name == NULL || *name == '\0') | |
450 | name = bfd_section_name (input_bfd, sec); | |
451 | } | |
a7c10850 | 452 | |
252b5132 RH |
453 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
454 | contents, rel->r_offset, | |
455 | relocation, rel->r_addend); | |
456 | ||
457 | if (r != bfd_reloc_ok) | |
458 | { | |
459 | const char * msg = (const char *) 0; | |
460 | ||
461 | switch (r) | |
462 | { | |
463 | case bfd_reloc_overflow: | |
464 | if (!((*info->callbacks->reloc_overflow) | |
465 | (info, name, howto->name, (bfd_vma) 0, | |
466 | input_bfd, input_section, rel->r_offset))) | |
467 | return false; | |
468 | break; | |
469 | ||
470 | case bfd_reloc_undefined: | |
471 | if (!((*info->callbacks->undefined_symbol) | |
472 | (info, name, input_bfd, input_section, | |
5cc7c785 | 473 | rel->r_offset, true))) |
252b5132 RH |
474 | return false; |
475 | break; | |
476 | ||
477 | case bfd_reloc_outofrange: | |
478 | msg = _ ("internal error: out of range error"); | |
479 | goto common_error; | |
480 | ||
481 | case bfd_reloc_notsupported: | |
482 | msg = _ ("internal error: unsupported relocation error"); | |
483 | goto common_error; | |
484 | ||
485 | case bfd_reloc_dangerous: | |
486 | msg = _ ("internal error: dangerous error"); | |
487 | goto common_error; | |
488 | ||
489 | default: | |
490 | msg = _ ("internal error: unknown error"); | |
491 | /* fall through */ | |
492 | ||
493 | common_error: | |
494 | if (!((*info->callbacks->warning) | |
495 | (info, msg, name, input_bfd, input_section, | |
496 | rel->r_offset))) | |
497 | return false; | |
498 | break; | |
499 | } | |
500 | } | |
501 | } | |
502 | ||
503 | return true; | |
504 | } | |
505 | #define ELF_ARCH bfd_arch_d10v | |
506 | #define ELF_MACHINE_CODE EM_CYGNUS_D10V | |
507 | #define ELF_MAXPAGESIZE 0x1000 | |
508 | ||
509 | #define TARGET_BIG_SYM bfd_elf32_d10v_vec | |
510 | #define TARGET_BIG_NAME "elf32-d10v" | |
511 | ||
512 | #define elf_info_to_howto 0 | |
513 | #define elf_info_to_howto_rel d10v_info_to_howto_rel | |
514 | #define elf_backend_object_p 0 | |
515 | #define elf_backend_final_write_processing 0 | |
516 | #define elf_backend_gc_mark_hook elf32_d10v_gc_mark_hook | |
517 | #define elf_backend_gc_sweep_hook elf32_d10v_gc_sweep_hook | |
518 | #define elf_backend_check_relocs elf32_d10v_check_relocs | |
519 | #define elf_backend_relocate_section elf32_d10v_relocate_section | |
520 | #define elf_backend_can_gc_sections 1 | |
521 | ||
522 | #include "elf32-target.h" |