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06c15ad7 HPN |
1 | /* CRIS-specific support for 32-bit ELF. |
2 | Copyright (C) 2000 Free Software Foundation, Inc. | |
3 | Contributed by Axis Communications AB. | |
4 | Written by Hans-Peter Nilsson, based on elf32-fr30.c | |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
26 | #include "elf/cris.h" | |
27 | ||
28 | /* Forward declarations. */ | |
29 | static reloc_howto_type * cris_reloc_type_lookup | |
30 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); | |
31 | ||
32 | static void cris_info_to_howto_rela | |
33 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
34 | ||
35 | static boolean cris_elf_relocate_section | |
36 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
37 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
38 | ||
39 | static bfd_reloc_status_type cris_final_link_relocate | |
40 | PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, | |
41 | Elf_Internal_Rela *, bfd_vma)); | |
42 | ||
43 | static boolean cris_elf_gc_sweep_hook | |
44 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
45 | const Elf_Internal_Rela *)); | |
46 | ||
47 | static asection * cris_elf_gc_mark_hook | |
48 | PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, | |
49 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); | |
50 | ||
51 | static reloc_howto_type cris_elf_howto_table [] = | |
52 | { | |
53 | /* This reloc does nothing. */ | |
54 | HOWTO (R_CRIS_NONE, /* type */ | |
55 | 0, /* rightshift */ | |
56 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
57 | 32, /* bitsize */ | |
58 | false, /* pc_relative */ | |
59 | 0, /* bitpos */ | |
60 | complain_overflow_bitfield, /* complain_on_overflow */ | |
61 | bfd_elf_generic_reloc, /* special_function */ | |
62 | "R_CRIS_NONE", /* name */ | |
63 | false, /* partial_inplace */ | |
64 | 0, /* src_mask */ | |
65 | 0, /* dst_mask */ | |
66 | false), /* pcrel_offset */ | |
67 | ||
68 | /* An 8 bit absolute relocation. */ | |
69 | HOWTO (R_CRIS_8, /* type */ | |
70 | 0, /* rightshift */ | |
71 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
72 | 8, /* bitsize */ | |
73 | false, /* pc_relative */ | |
74 | 0, /* bitpos */ | |
75 | complain_overflow_bitfield, /* complain_on_overflow */ | |
76 | bfd_elf_generic_reloc, /* special_function */ | |
77 | "R_CRIS_8", /* name */ | |
78 | false, /* partial_inplace */ | |
79 | 0x0000, /* src_mask */ | |
80 | 0x00ff, /* dst_mask */ | |
81 | false), /* pcrel_offset */ | |
82 | ||
83 | /* A 16 bit absolute relocation. */ | |
84 | HOWTO (R_CRIS_16, /* type */ | |
85 | 0, /* rightshift */ | |
86 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
87 | 16, /* bitsize */ | |
88 | false, /* pc_relative */ | |
89 | 0, /* bitpos */ | |
90 | complain_overflow_bitfield, /* complain_on_overflow */ | |
91 | bfd_elf_generic_reloc, /* special_function */ | |
92 | "R_CRIS_16", /* name */ | |
93 | false, /* partial_inplace */ | |
94 | 0x00000000, /* src_mask */ | |
95 | 0x0000ffff, /* dst_mask */ | |
96 | false), /* pcrel_offset */ | |
97 | ||
98 | /* A 32 bit absolute relocation. */ | |
99 | HOWTO (R_CRIS_32, /* type */ | |
100 | 0, /* rightshift */ | |
101 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
102 | 32, /* bitsize */ | |
103 | false, /* pc_relative */ | |
104 | 0, /* bitpos */ | |
105 | complain_overflow_bitfield, /* complain_on_overflow */ | |
106 | bfd_elf_generic_reloc, /* special_function */ | |
107 | "R_CRIS_32", /* name */ | |
108 | false, /* partial_inplace */ | |
109 | 0x00000000, /* src_mask */ | |
110 | 0xffffffff, /* dst_mask */ | |
111 | false), /* pcrel_offset */ | |
112 | ||
113 | /* An 8 bit absolute relocation. */ | |
114 | HOWTO (R_CRIS_8_PCREL, /* type */ | |
115 | 0, /* rightshift */ | |
116 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
117 | 8, /* bitsize */ | |
118 | true, /* pc_relative */ | |
119 | 0, /* bitpos */ | |
120 | complain_overflow_bitfield, /* complain_on_overflow */ | |
121 | bfd_elf_generic_reloc, /* special_function */ | |
122 | "R_CRIS_8_PCREL", /* name */ | |
123 | false, /* partial_inplace */ | |
124 | 0x0000, /* src_mask */ | |
125 | 0x00ff, /* dst_mask */ | |
126 | false), /* pcrel_offset */ | |
127 | ||
128 | /* A 16 bit absolute relocation. */ | |
129 | HOWTO (R_CRIS_16_PCREL, /* type */ | |
130 | 0, /* rightshift */ | |
131 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
132 | 16, /* bitsize */ | |
133 | true, /* pc_relative */ | |
134 | 0, /* bitpos */ | |
135 | complain_overflow_bitfield, /* complain_on_overflow */ | |
136 | bfd_elf_generic_reloc, /* special_function */ | |
137 | "R_CRIS_16", /* name */ | |
138 | false, /* partial_inplace */ | |
139 | 0x00000000, /* src_mask */ | |
140 | 0x0000ffff, /* dst_mask */ | |
141 | false), /* pcrel_offset */ | |
142 | ||
143 | /* A 32 bit absolute relocation. */ | |
144 | HOWTO (R_CRIS_32_PCREL, /* type */ | |
145 | 0, /* rightshift */ | |
146 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
147 | 32, /* bitsize */ | |
148 | true, /* pc_relative */ | |
149 | 0, /* bitpos */ | |
150 | complain_overflow_bitfield, /* complain_on_overflow */ | |
151 | bfd_elf_generic_reloc, /* special_function */ | |
152 | "R_CRIS_32", /* name */ | |
153 | false, /* partial_inplace */ | |
154 | 0x00000000, /* src_mask */ | |
155 | 0xffffffff, /* dst_mask */ | |
156 | false), /* pcrel_offset */ | |
157 | ||
158 | /* GNU extension to record C++ vtable hierarchy */ | |
159 | HOWTO (R_CRIS_GNU_VTINHERIT, /* type */ | |
160 | 0, /* rightshift */ | |
161 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
162 | 0, /* bitsize */ | |
163 | false, /* pc_relative */ | |
164 | 0, /* bitpos */ | |
165 | complain_overflow_dont, /* complain_on_overflow */ | |
166 | NULL, /* special_function */ | |
167 | "R_CRIS_GNU_VTINHERIT", /* name */ | |
168 | false, /* partial_inplace */ | |
169 | 0, /* src_mask */ | |
170 | 0, /* dst_mask */ | |
171 | false), /* pcrel_offset */ | |
172 | ||
173 | /* GNU extension to record C++ vtable member usage */ | |
174 | HOWTO (R_CRIS_GNU_VTENTRY, /* type */ | |
175 | 0, /* rightshift */ | |
176 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
177 | 0, /* bitsize */ | |
178 | false, /* pc_relative */ | |
179 | 0, /* bitpos */ | |
180 | complain_overflow_dont, /* complain_on_overflow */ | |
181 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
182 | "R_CRIS_GNU_VTENTRY", /* name */ | |
183 | false, /* partial_inplace */ | |
184 | 0, /* src_mask */ | |
185 | 0, /* dst_mask */ | |
186 | false) /* pcrel_offset */ | |
187 | }; | |
188 | \f | |
189 | /* Map BFD reloc types to CRIS ELF reloc types. */ | |
190 | ||
191 | struct cris_reloc_map | |
192 | { | |
193 | bfd_reloc_code_real_type bfd_reloc_val; | |
194 | unsigned int cris_reloc_val; | |
195 | }; | |
196 | ||
197 | static const struct cris_reloc_map cris_reloc_map [] = | |
198 | { | |
199 | { BFD_RELOC_NONE, R_CRIS_NONE }, | |
200 | { BFD_RELOC_8, R_CRIS_8 }, | |
201 | { BFD_RELOC_16, R_CRIS_16 }, | |
202 | { BFD_RELOC_32, R_CRIS_32 }, | |
203 | { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL }, | |
204 | { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL }, | |
205 | { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL }, | |
206 | { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT }, | |
207 | { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY } | |
208 | }; | |
209 | ||
210 | static reloc_howto_type * | |
211 | cris_reloc_type_lookup (abfd, code) | |
212 | bfd * abfd ATTRIBUTE_UNUSED; | |
213 | bfd_reloc_code_real_type code; | |
214 | { | |
215 | unsigned int i; | |
216 | ||
217 | for (i = sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); | |
218 | --i;) | |
219 | if (cris_reloc_map [i].bfd_reloc_val == code) | |
220 | return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val]; | |
221 | ||
222 | return NULL; | |
223 | } | |
224 | ||
225 | /* Set the howto pointer for an CRIS ELF reloc. */ | |
226 | ||
227 | static void | |
228 | cris_info_to_howto_rela (abfd, cache_ptr, dst) | |
229 | bfd * abfd ATTRIBUTE_UNUSED; | |
230 | arelent * cache_ptr; | |
231 | Elf32_Internal_Rela * dst; | |
232 | { | |
233 | unsigned int r_type; | |
234 | ||
235 | r_type = ELF32_R_TYPE (dst->r_info); | |
236 | BFD_ASSERT (r_type < (unsigned int) R_CRIS_max); | |
237 | cache_ptr->howto = & cris_elf_howto_table [r_type]; | |
238 | } | |
239 | \f | |
240 | /* Perform a single relocation. By default we use the standard BFD | |
241 | routines, but we might have to do a few relocs ourselves in the future. */ | |
242 | ||
243 | static bfd_reloc_status_type | |
244 | cris_final_link_relocate (howto, input_bfd, input_section, contents, rel, | |
245 | relocation) | |
246 | reloc_howto_type * howto; | |
247 | bfd * input_bfd; | |
248 | asection * input_section; | |
249 | bfd_byte * contents; | |
250 | Elf_Internal_Rela * rel; | |
251 | bfd_vma relocation; | |
252 | { | |
253 | bfd_reloc_status_type r | |
254 | = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
255 | contents, rel->r_offset, | |
256 | relocation, rel->r_addend); | |
257 | return r; | |
258 | } | |
259 | \f | |
260 | /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was | |
261 | copied, for further comments. */ | |
262 | ||
263 | static boolean | |
264 | cris_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
265 | contents, relocs, local_syms, local_sections) | |
266 | bfd * output_bfd ATTRIBUTE_UNUSED; | |
267 | struct bfd_link_info * info; | |
268 | bfd * input_bfd; | |
269 | asection * input_section; | |
270 | bfd_byte * contents; | |
271 | Elf_Internal_Rela * relocs; | |
272 | Elf_Internal_Sym * local_syms; | |
273 | asection ** local_sections; | |
274 | { | |
275 | Elf_Internal_Shdr * symtab_hdr; | |
276 | struct elf_link_hash_entry ** sym_hashes; | |
277 | Elf_Internal_Rela * rel; | |
278 | Elf_Internal_Rela * relend; | |
279 | ||
280 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
281 | sym_hashes = elf_sym_hashes (input_bfd); | |
282 | relend = relocs + input_section->reloc_count; | |
283 | ||
284 | /* It seems this can happen with erroneous or unsupported input (mixing | |
285 | a.out and elf in an archive, for example.) */ | |
286 | if (sym_hashes == NULL) | |
287 | return false; | |
288 | ||
289 | for (rel = relocs; rel < relend; rel ++) | |
290 | { | |
291 | reloc_howto_type * howto; | |
292 | unsigned long r_symndx; | |
293 | Elf_Internal_Sym * sym; | |
294 | asection * sec; | |
295 | struct elf_link_hash_entry * h; | |
296 | bfd_vma relocation; | |
297 | bfd_reloc_status_type r; | |
298 | const char * name = NULL; | |
299 | int r_type; | |
300 | ||
301 | r_type = ELF32_R_TYPE (rel->r_info); | |
302 | ||
303 | if ( r_type == R_CRIS_GNU_VTINHERIT | |
304 | || r_type == R_CRIS_GNU_VTENTRY) | |
305 | continue; | |
306 | ||
307 | r_symndx = ELF32_R_SYM (rel->r_info); | |
308 | ||
309 | if (info->relocateable) | |
310 | { | |
311 | /* This is a relocateable link. We don't have to change | |
312 | anything, unless the reloc is against a section symbol, | |
313 | in which case we have to adjust according to where the | |
314 | section symbol winds up in the output section. */ | |
315 | if (r_symndx < symtab_hdr->sh_info) | |
316 | { | |
317 | sym = local_syms + r_symndx; | |
318 | ||
319 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
320 | { | |
321 | sec = local_sections [r_symndx]; | |
322 | rel->r_addend += sec->output_offset + sym->st_value; | |
323 | } | |
324 | } | |
325 | ||
326 | continue; | |
327 | } | |
328 | ||
329 | /* This is a final link. */ | |
330 | howto = cris_elf_howto_table + ELF32_R_TYPE (rel->r_info); | |
331 | h = NULL; | |
332 | sym = NULL; | |
333 | sec = NULL; | |
334 | ||
335 | if (r_symndx < symtab_hdr->sh_info) | |
336 | { | |
337 | sym = local_syms + r_symndx; | |
338 | sec = local_sections [r_symndx]; | |
339 | relocation = (sec->output_section->vma | |
340 | + sec->output_offset | |
341 | + sym->st_value); | |
342 | ||
343 | name = bfd_elf_string_from_elf_section | |
344 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
345 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
346 | #if 0 | |
347 | fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n", | |
348 | sec->name, name, sym->st_name, | |
349 | sec->output_section->vma, sec->output_offset, | |
350 | sym->st_value, rel->r_addend); | |
351 | #endif | |
352 | } | |
353 | else | |
354 | { | |
355 | h = sym_hashes [r_symndx - symtab_hdr->sh_info]; | |
356 | ||
357 | while (h->root.type == bfd_link_hash_indirect | |
358 | || h->root.type == bfd_link_hash_warning) | |
359 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
360 | ||
361 | name = h->root.root.string; | |
362 | ||
363 | if (h->root.type == bfd_link_hash_defined | |
364 | || h->root.type == bfd_link_hash_defweak) | |
365 | { | |
366 | sec = h->root.u.def.section; | |
367 | relocation = (h->root.u.def.value | |
368 | + sec->output_section->vma | |
369 | + sec->output_offset); | |
370 | #if 0 | |
371 | fprintf (stderr, | |
372 | "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n", | |
373 | sec->name, name, h->root.u.def.value, | |
374 | sec->output_section->vma, sec->output_offset, relocation); | |
375 | #endif | |
376 | } | |
377 | else if (h->root.type == bfd_link_hash_undefweak) | |
378 | { | |
379 | #if 0 | |
380 | fprintf (stderr, "undefined: sec: %s, name: %s\n", | |
381 | sec->name, name); | |
382 | #endif | |
383 | relocation = 0; | |
384 | } | |
385 | else if (info->shared | |
386 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
387 | relocation = 0; | |
388 | else | |
389 | { | |
390 | if (! ((*info->callbacks->undefined_symbol) | |
391 | (info, h->root.root.string, input_bfd, | |
392 | input_section, rel->r_offset, true))) | |
393 | return false; | |
394 | #if 0 | |
395 | fprintf (stderr, "unknown: name: %s\n", name); | |
396 | #endif | |
397 | relocation = 0; | |
398 | } | |
399 | } | |
400 | ||
401 | r = cris_final_link_relocate (howto, input_bfd, input_section, | |
402 | contents, rel, relocation); | |
403 | ||
404 | if (r != bfd_reloc_ok) | |
405 | { | |
406 | const char * msg = (const char *) NULL; | |
407 | ||
408 | switch (r) | |
409 | { | |
410 | case bfd_reloc_overflow: | |
411 | r = info->callbacks->reloc_overflow | |
412 | (info, name, howto->name, (bfd_vma) 0, | |
413 | input_bfd, input_section, rel->r_offset); | |
414 | break; | |
415 | ||
416 | case bfd_reloc_undefined: | |
417 | r = info->callbacks->undefined_symbol | |
418 | (info, name, input_bfd, input_section, rel->r_offset, | |
419 | true); | |
420 | break; | |
421 | ||
422 | case bfd_reloc_outofrange: | |
423 | msg = _("internal error: out of range error"); | |
424 | break; | |
425 | ||
426 | case bfd_reloc_notsupported: | |
427 | msg = _("internal error: unsupported relocation error"); | |
428 | break; | |
429 | ||
430 | case bfd_reloc_dangerous: | |
431 | msg = _("internal error: dangerous relocation"); | |
432 | break; | |
433 | ||
434 | default: | |
435 | msg = _("internal error: unknown error"); | |
436 | break; | |
437 | } | |
438 | ||
439 | if (msg) | |
440 | r = info->callbacks->warning | |
441 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
442 | ||
443 | if (! r) | |
444 | return false; | |
445 | } | |
446 | } | |
447 | ||
448 | return true; | |
449 | } | |
450 | \f | |
451 | /* Return the section that should be marked against GC for a given | |
452 | relocation. */ | |
453 | ||
454 | static asection * | |
455 | cris_elf_gc_mark_hook (abfd, info, rel, h, sym) | |
456 | bfd * abfd; | |
457 | struct bfd_link_info * info ATTRIBUTE_UNUSED; | |
458 | Elf_Internal_Rela * rel; | |
459 | struct elf_link_hash_entry * h; | |
460 | Elf_Internal_Sym * sym; | |
461 | { | |
462 | if (h != NULL) | |
463 | { | |
464 | switch (ELF32_R_TYPE (rel->r_info)) | |
465 | { | |
466 | case R_CRIS_GNU_VTINHERIT: | |
467 | case R_CRIS_GNU_VTENTRY: | |
468 | break; | |
469 | ||
470 | default: | |
471 | switch (h->root.type) | |
472 | { | |
473 | case bfd_link_hash_defined: | |
474 | case bfd_link_hash_defweak: | |
475 | return h->root.u.def.section; | |
476 | ||
477 | case bfd_link_hash_common: | |
478 | return h->root.u.c.p->section; | |
479 | ||
480 | default: | |
481 | break; | |
482 | } | |
483 | } | |
484 | } | |
485 | else | |
486 | { | |
487 | if (!(elf_bad_symtab (abfd) | |
488 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
489 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
490 | && sym->st_shndx != SHN_COMMON)) | |
491 | { | |
492 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
493 | } | |
494 | } | |
495 | ||
496 | return NULL; | |
497 | } | |
498 | ||
499 | /* Update the got entry reference counts for the section being removed. */ | |
500 | ||
501 | static boolean | |
502 | cris_elf_gc_sweep_hook (abfd, info, sec, relocs) | |
503 | bfd * abfd ATTRIBUTE_UNUSED; | |
504 | struct bfd_link_info * info ATTRIBUTE_UNUSED; | |
505 | asection * sec ATTRIBUTE_UNUSED; | |
506 | const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED; | |
507 | { | |
508 | return true; | |
509 | } | |
510 | ||
511 | /* Look through the relocs for a section during the first phase. | |
512 | Since we don't do .gots or .plts, we just need to consider the | |
513 | virtual table relocs for gc. */ | |
514 | ||
515 | static boolean | |
516 | cris_elf_check_relocs (abfd, info, sec, relocs) | |
517 | bfd *abfd; | |
518 | struct bfd_link_info *info; | |
519 | asection *sec; | |
520 | const Elf_Internal_Rela *relocs; | |
521 | { | |
522 | Elf_Internal_Shdr *symtab_hdr; | |
523 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
524 | const Elf_Internal_Rela *rel; | |
525 | const Elf_Internal_Rela *rel_end; | |
526 | ||
527 | if (info->relocateable) | |
528 | return true; | |
529 | ||
530 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
531 | sym_hashes = elf_sym_hashes (abfd); | |
532 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); | |
533 | if (!elf_bad_symtab (abfd)) | |
534 | sym_hashes_end -= symtab_hdr->sh_info; | |
535 | ||
536 | rel_end = relocs + sec->reloc_count; | |
537 | for (rel = relocs; rel < rel_end; rel++) | |
538 | { | |
539 | struct elf_link_hash_entry *h; | |
540 | unsigned long r_symndx; | |
541 | ||
542 | r_symndx = ELF32_R_SYM (rel->r_info); | |
543 | if (r_symndx < symtab_hdr->sh_info) | |
544 | h = NULL; | |
545 | else | |
546 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
547 | ||
548 | switch (ELF32_R_TYPE (rel->r_info)) | |
549 | { | |
550 | /* This relocation describes the C++ object vtable hierarchy. | |
551 | Reconstruct it for later use during GC. */ | |
552 | case R_CRIS_GNU_VTINHERIT: | |
553 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
554 | return false; | |
555 | break; | |
556 | ||
557 | /* This relocation describes which C++ vtable entries are actually | |
558 | used. Record for later use during GC. */ | |
559 | case R_CRIS_GNU_VTENTRY: | |
560 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
561 | return false; | |
562 | break; | |
563 | } | |
564 | } | |
565 | ||
566 | return true; | |
567 | } | |
568 | \f | |
569 | #define ELF_ARCH bfd_arch_cris | |
570 | #define ELF_MACHINE_CODE EM_CRIS | |
571 | #define ELF_MAXPAGESIZE 0x2000 | |
572 | ||
573 | #define TARGET_LITTLE_SYM bfd_elf32_cris_vec | |
574 | #define TARGET_LITTLE_NAME "elf32-cris" | |
575 | ||
576 | /* For the time being, we have a leading underscore. Perhaps change to 0 | |
577 | later, when | |
578 | 1) a.out isn't as dominating, and we can forget about multiformat links | |
579 | and old assembly code. | |
580 | 2) there's an official solution to the symbol vs. register duality | |
581 | problem; perhaps a % register prefix, optionally enforced. */ | |
582 | #define elf_symbol_leading_char '_' | |
583 | ||
584 | #define elf_info_to_howto_rel NULL | |
585 | #define elf_info_to_howto cris_info_to_howto_rela | |
586 | #define elf_backend_relocate_section cris_elf_relocate_section | |
587 | #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook | |
588 | #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook | |
589 | #define elf_backend_check_relocs cris_elf_check_relocs | |
590 | ||
591 | #define elf_backend_can_gc_sections 1 | |
592 | ||
593 | #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup | |
594 | ||
595 | /* Later, we my want to optimize RELA entries into REL entries for dynamic | |
596 | linking and libraries (if it's a win of any significance). Until then, | |
597 | take the easy route. */ | |
598 | #define elf_backend_may_use_rel_p 0 | |
599 | #define elf_backend_may_use_rela_p 1 | |
600 | ||
601 | #include "elf32-target.h" |