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2001-11-02 H.J. Lu (hjl@gnu.org)
[binutils.git] / bfd / elf32-fr30.c
blob320a3c169bf195f1def523f3e9877d04d46c5cd8
1 /* FR30-specific support for 32-bit ELF.
2 Copyright 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19
20 #include "bfd.h"
21 #include "sysdep.h"
22 #include "libbfd.h"
23 #include "elf-bfd.h"
24 #include "elf/fr30.h"
25
26 /* Forward declarations. */
27 static bfd_reloc_status_type fr30_elf_i20_reloc
28 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
29 static bfd_reloc_status_type fr30_elf_i32_reloc
30 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
31 static reloc_howto_type * fr30_reloc_type_lookup
32 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
33 static void fr30_info_to_howto_rela
34 PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
35 static boolean fr30_elf_relocate_section
36 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
37 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
38 static bfd_reloc_status_type fr30_final_link_relocate
39 PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
40 Elf_Internal_Rela *, bfd_vma));
41 static boolean fr30_elf_gc_sweep_hook
42 PARAMS ((bfd *, struct bfd_link_info *, asection *,
43 const Elf_Internal_Rela *));
44 static asection * fr30_elf_gc_mark_hook
45 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
46 struct elf_link_hash_entry *, Elf_Internal_Sym *));
47 static boolean fr30_elf_check_relocs
48 PARAMS ((bfd *, struct bfd_link_info *, asection *,
49 const Elf_Internal_Rela *));
50
51 static reloc_howto_type fr30_elf_howto_table [] =
52 {
53 /* This reloc does nothing. */
54 HOWTO (R_FR30_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_FR30_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_FR30_8, /* type */
70 0, /* rightshift */
71 1, /* size (0 = byte, 1 = short, 2 = long) */
72 8, /* bitsize */
73 false, /* pc_relative */
74 4, /* bitpos */
75 complain_overflow_bitfield, /* complain_on_overflow */
76 bfd_elf_generic_reloc, /* special_function */
77 "R_FR30_8", /* name */
78 true, /* partial_inplace */
79 0x0000, /* src_mask */
80 0x0ff0, /* dst_mask */
81 false), /* pcrel_offset */
82
83 /* A 20 bit absolute relocation. */
84 HOWTO (R_FR30_20, /* type */
85 0, /* rightshift */
86 2, /* size (0 = byte, 1 = short, 2 = long) */
87 20, /* bitsize */
88 false, /* pc_relative */
89 0, /* bitpos */
90 complain_overflow_bitfield, /* complain_on_overflow */
91 fr30_elf_i20_reloc, /* special_function */
92 "R_FR30_20", /* name */
93 true, /* partial_inplace */
94 0x00000000, /* src_mask */
95 0x00f0ffff, /* dst_mask */
96 false), /* pcrel_offset */
97
98 /* A 32 bit absolute relocation. */
99 HOWTO (R_FR30_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_FR30_32", /* name */
108 true, /* partial_inplace */
109 0x00000000, /* src_mask */
110 0xffffffff, /* dst_mask */
111 false), /* pcrel_offset */
112
113 /* A 32 bit into 48 bits absolute relocation. */
114 HOWTO (R_FR30_48, /* type */
115 0, /* rightshift */
116 2, /* size (0 = byte, 1 = short, 2 = long) */
117 32, /* bitsize */
118 false, /* pc_relative */
119 0, /* bitpos */
120 complain_overflow_bitfield, /* complain_on_overflow */
121 fr30_elf_i32_reloc, /* special_function */
122 "R_FR30_48", /* name */
123 true, /* partial_inplace */
124 0x00000000, /* src_mask */
125 0xffffffff, /* dst_mask */
126 false), /* pcrel_offset */
127
128 /* A 6 bit absolute relocation. */
129 HOWTO (R_FR30_6_IN_4, /* type */
130 2, /* rightshift */
131 1, /* size (0 = byte, 1 = short, 2 = long) */
132 6, /* bitsize */
133 false, /* pc_relative */
134 4, /* bitpos */
135 complain_overflow_unsigned, /* complain_on_overflow */
136 bfd_elf_generic_reloc, /* special_function */
137 "R_FR30_6_IN_4", /* name */
138 true, /* partial_inplace */
139 0x0000, /* src_mask */
140 0x00f0, /* dst_mask */
141 false), /* pcrel_offset */
142
143 /* An 8 bit absolute relocation. */
144 HOWTO (R_FR30_8_IN_8, /* type */
145 0, /* rightshift */
146 1, /* size (0 = byte, 1 = short, 2 = long) */
147 8, /* bitsize */
148 false, /* pc_relative */
149 4, /* bitpos */
150 complain_overflow_signed, /* complain_on_overflow */
151 bfd_elf_generic_reloc,/* special_function */
152 "R_FR30_8_IN_8", /* name */
153 true, /* partial_inplace */
154 0x0000, /* src_mask */
155 0x0ff0, /* dst_mask */
156 false), /* pcrel_offset */
157
158 /* A 9 bit absolute relocation. */
159 HOWTO (R_FR30_9_IN_8, /* type */
160 1, /* rightshift */
161 1, /* size (0 = byte, 1 = short, 2 = long) */
162 9, /* bitsize */
163 false, /* pc_relative */
164 4, /* bitpos */
165 complain_overflow_signed, /* complain_on_overflow */
166 bfd_elf_generic_reloc,/* special_function */
167 "R_FR30_9_IN_8", /* name */
168 true, /* partial_inplace */
169 0x0000, /* src_mask */
170 0x0ff0, /* dst_mask */
171 false), /* pcrel_offset */
172
173 /* A 10 bit absolute relocation. */
174 HOWTO (R_FR30_10_IN_8, /* type */
175 2, /* rightshift */
176 1, /* size (0 = byte, 1 = short, 2 = long) */
177 10, /* bitsize */
178 false, /* pc_relative */
179 4, /* bitpos */
180 complain_overflow_signed, /* complain_on_overflow */
181 bfd_elf_generic_reloc,/* special_function */
182 "R_FR30_10_IN_8", /* name */
183 true, /* partial_inplace */
184 0x0000, /* src_mask */
185 0x0ff0, /* dst_mask */
186 false), /* pcrel_offset */
187
188 /* A PC relative 9 bit relocation, right shifted by 1. */
189 HOWTO (R_FR30_9_PCREL, /* type */
190 1, /* rightshift */
191 1, /* size (0 = byte, 1 = short, 2 = long) */
192 9, /* bitsize */
193 true, /* pc_relative */
194 0, /* bitpos */
195 complain_overflow_signed, /* complain_on_overflow */
196 bfd_elf_generic_reloc, /* special_function */
197 "R_FR30_9_PCREL", /* name */
198 false, /* partial_inplace */
199 0x0000, /* src_mask */
200 0x00ff, /* dst_mask */
201 false), /* pcrel_offset */
202
203 /* A PC relative 12 bit relocation, right shifted by 1. */
204 HOWTO (R_FR30_12_PCREL, /* type */
205 1, /* rightshift */
206 1, /* size (0 = byte, 1 = short, 2 = long) */
207 12, /* bitsize */
208 true, /* pc_relative */
209 0, /* bitpos */
210 complain_overflow_signed, /* complain_on_overflow */
211 bfd_elf_generic_reloc, /* special_function */
212 "R_FR30_12_PCREL", /* name */
213 false, /* partial_inplace */
214 0x0000, /* src_mask */
215 0x07ff, /* dst_mask */
216 false), /* pcrel_offset */
217 /* GNU extension to record C++ vtable hierarchy */
218 HOWTO (R_FR30_GNU_VTINHERIT, /* type */
219 0, /* rightshift */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
221 0, /* bitsize */
222 false, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_dont, /* complain_on_overflow */
225 NULL, /* special_function */
226 "R_FR30_GNU_VTINHERIT", /* name */
227 false, /* partial_inplace */
228 0, /* src_mask */
229 0, /* dst_mask */
230 false), /* pcrel_offset */
231
232 /* GNU extension to record C++ vtable member usage */
233 HOWTO (R_FR30_GNU_VTENTRY, /* type */
234 0, /* rightshift */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
236 0, /* bitsize */
237 false, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_dont, /* complain_on_overflow */
240 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
241 "R_FR30_GNU_VTENTRY", /* name */
242 false, /* partial_inplace */
243 0, /* src_mask */
244 0, /* dst_mask */
245 false), /* pcrel_offset */
246 };
247 \f
248 /* Utility to actually perform an R_FR30_20 reloc. */
249
250 static bfd_reloc_status_type
251 fr30_elf_i20_reloc (abfd, reloc_entry, symbol, data,
252 input_section, output_bfd, error_message)
253 bfd * abfd;
254 arelent * reloc_entry;
255 asymbol * symbol;
256 PTR data;
257 asection * input_section;
258 bfd * output_bfd;
259 char ** error_message ATTRIBUTE_UNUSED;
260 {
261 bfd_vma relocation;
262 unsigned long x;
263
264 /* This part is from bfd_elf_generic_reloc. */
265 if (output_bfd != (bfd *) NULL
266 && (symbol->flags & BSF_SECTION_SYM) == 0
267 && (! reloc_entry->howto->partial_inplace
268 || reloc_entry->addend == 0))
269 {
270 reloc_entry->address += input_section->output_offset;
271 return bfd_reloc_ok;
272 }
273
274 if (output_bfd != NULL)
275 /* FIXME: See bfd_perform_relocation. Is this right? */
276 return bfd_reloc_ok;
277
278 relocation =
279 symbol->value
280 + symbol->section->output_section->vma
281 + symbol->section->output_offset
282 + reloc_entry->addend;
283
284 if (relocation > (((bfd_vma) 1 << 20) - 1))
285 return bfd_reloc_overflow;
286
287 x = bfd_get_32 (abfd, (char *) data + reloc_entry->address);
288 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
289 bfd_put_32 (abfd, (bfd_vma) x, (char *) data + reloc_entry->address);
290
291 return bfd_reloc_ok;
292 }
293 \f
294 /* Utility to actually perform a R_FR30_48 reloc. */
295
296 static bfd_reloc_status_type
297 fr30_elf_i32_reloc (abfd, reloc_entry, symbol, data,
298 input_section, output_bfd, error_message)
299 bfd * abfd;
300 arelent * reloc_entry;
301 asymbol * symbol;
302 PTR data;
303 asection * input_section;
304 bfd * output_bfd;
305 char ** error_message ATTRIBUTE_UNUSED;
306 {
307 bfd_vma relocation;
308
309 /* This part is from bfd_elf_generic_reloc. */
310 if (output_bfd != (bfd *) NULL
311 && (symbol->flags & BSF_SECTION_SYM) == 0
312 && (! reloc_entry->howto->partial_inplace
313 || reloc_entry->addend == 0))
314 {
315 reloc_entry->address += input_section->output_offset;
316 return bfd_reloc_ok;
317 }
318
319 if (output_bfd != NULL)
320 /* FIXME: See bfd_perform_relocation. Is this right? */
321 return bfd_reloc_ok;
322
323 relocation =
324 symbol->value
325 + symbol->section->output_section->vma
326 + symbol->section->output_offset
327 + reloc_entry->addend;
328
329 bfd_put_32 (abfd, relocation, (char *) data + reloc_entry->address + 2);
330
331 return bfd_reloc_ok;
332 }
333 \f
334 /* Map BFD reloc types to FR30 ELF reloc types. */
335
336 struct fr30_reloc_map
337 {
338 bfd_reloc_code_real_type bfd_reloc_val;
339 unsigned int fr30_reloc_val;
340 };
341
342 static const struct fr30_reloc_map fr30_reloc_map [] =
343 {
344 { BFD_RELOC_NONE, R_FR30_NONE },
345 { BFD_RELOC_8, R_FR30_8 },
346 { BFD_RELOC_FR30_20, R_FR30_20 },
347 { BFD_RELOC_32, R_FR30_32 },
348 { BFD_RELOC_FR30_48, R_FR30_48 },
349 { BFD_RELOC_FR30_6_IN_4, R_FR30_6_IN_4 },
350 { BFD_RELOC_FR30_8_IN_8, R_FR30_8_IN_8 },
351 { BFD_RELOC_FR30_9_IN_8, R_FR30_9_IN_8 },
352 { BFD_RELOC_FR30_10_IN_8, R_FR30_10_IN_8 },
353 { BFD_RELOC_FR30_9_PCREL, R_FR30_9_PCREL },
354 { BFD_RELOC_FR30_12_PCREL, R_FR30_12_PCREL },
355 { BFD_RELOC_VTABLE_INHERIT, R_FR30_GNU_VTINHERIT },
356 { BFD_RELOC_VTABLE_ENTRY, R_FR30_GNU_VTENTRY },
357 };
358
359 static reloc_howto_type *
360 fr30_reloc_type_lookup (abfd, code)
361 bfd * abfd ATTRIBUTE_UNUSED;
362 bfd_reloc_code_real_type code;
363 {
364 unsigned int i;
365
366 for (i = sizeof (fr30_reloc_map) / sizeof (fr30_reloc_map[0]);
367 --i;)
368 if (fr30_reloc_map [i].bfd_reloc_val == code)
369 return & fr30_elf_howto_table [fr30_reloc_map[i].fr30_reloc_val];
370
371 return NULL;
372 }
373
374 /* Set the howto pointer for an FR30 ELF reloc. */
375
376 static void
377 fr30_info_to_howto_rela (abfd, cache_ptr, dst)
378 bfd * abfd ATTRIBUTE_UNUSED;
379 arelent * cache_ptr;
380 Elf32_Internal_Rela * dst;
381 {
382 unsigned int r_type;
383
384 r_type = ELF32_R_TYPE (dst->r_info);
385 BFD_ASSERT (r_type < (unsigned int) R_FR30_max);
386 cache_ptr->howto = & fr30_elf_howto_table [r_type];
387 }
388 \f
389 /* Perform a single relocation. By default we use the standard BFD
390 routines, but a few relocs, we have to do them ourselves. */
391
392 static bfd_reloc_status_type
393 fr30_final_link_relocate (howto, input_bfd, input_section, contents, rel, relocation)
394 reloc_howto_type * howto;
395 bfd * input_bfd;
396 asection * input_section;
397 bfd_byte * contents;
398 Elf_Internal_Rela * rel;
399 bfd_vma relocation;
400 {
401 bfd_reloc_status_type r = bfd_reloc_ok;
402 bfd_vma x;
403 bfd_signed_vma srel;
404
405 switch (howto->type)
406 {
407 case R_FR30_20:
408 contents += rel->r_offset;
409 relocation += rel->r_addend;
410
411 if (relocation > ((1 << 20) - 1))
412 return bfd_reloc_overflow;
413
414 x = bfd_get_32 (input_bfd, contents);
415 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
416 bfd_put_32 (input_bfd, x, contents);
417 break;
418
419 case R_FR30_48:
420 contents += rel->r_offset + 2;
421 relocation += rel->r_addend;
422 bfd_put_32 (input_bfd, relocation, contents);
423 break;
424
425 case R_FR30_9_PCREL:
426 contents += rel->r_offset + 1;
427 srel = (bfd_signed_vma) relocation;
428 srel += rel->r_addend;
429 srel -= rel->r_offset;
430 srel -= 2; /* Branch instructions add 2 to the PC... */
431 srel -= (input_section->output_section->vma +
432 input_section->output_offset);
433
434 if (srel & 1)
435 return bfd_reloc_outofrange;
436 if (srel > ((1 << 8) - 1) || (srel < - (1 << 8)))
437 return bfd_reloc_overflow;
438
439 bfd_put_8 (input_bfd, srel >> 1, contents);
440 break;
441
442 case R_FR30_12_PCREL:
443 contents += rel->r_offset;
444 srel = (bfd_signed_vma) relocation;
445 srel += rel->r_addend;
446 srel -= rel->r_offset;
447 srel -= 2; /* Branch instructions add 2 to the PC... */
448 srel -= (input_section->output_section->vma +
449 input_section->output_offset);
450
451 if (srel & 1)
452 return bfd_reloc_outofrange;
453 if (srel > ((1 << 11) - 1) || (srel < - (1 << 11)))
454 return bfd_reloc_overflow;
455
456 x = bfd_get_16 (input_bfd, contents);
457 x = (x & 0xf800) | ((srel >> 1) & 0x7ff);
458 bfd_put_16 (input_bfd, x, contents);
459 break;
460
461 default:
462 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
463 contents, rel->r_offset,
464 relocation, rel->r_addend);
465 }
466
467 return r;
468 }
469 \f
470 /* Relocate an FR30 ELF section.
471 There is some attempt to make this function usable for many architectures,
472 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
473 if only to serve as a learning tool.
474
475 The RELOCATE_SECTION function is called by the new ELF backend linker
476 to handle the relocations for a section.
477
478 The relocs are always passed as Rela structures; if the section
479 actually uses Rel structures, the r_addend field will always be
480 zero.
481
482 This function is responsible for adjusting the section contents as
483 necessary, and (if using Rela relocs and generating a relocateable
484 output file) adjusting the reloc addend as necessary.
485
486 This function does not have to worry about setting the reloc
487 address or the reloc symbol index.
488
489 LOCAL_SYMS is a pointer to the swapped in local symbols.
490
491 LOCAL_SECTIONS is an array giving the section in the input file
492 corresponding to the st_shndx field of each local symbol.
493
494 The global hash table entry for the global symbols can be found
495 via elf_sym_hashes (input_bfd).
496
497 When generating relocateable output, this function must handle
498 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
499 going to be the section symbol corresponding to the output
500 section, which means that the addend must be adjusted
501 accordingly. */
502
503 static boolean
504 fr30_elf_relocate_section (output_bfd, info, input_bfd, input_section,
505 contents, relocs, local_syms, local_sections)
506 bfd * output_bfd ATTRIBUTE_UNUSED;
507 struct bfd_link_info * info;
508 bfd * input_bfd;
509 asection * input_section;
510 bfd_byte * contents;
511 Elf_Internal_Rela * relocs;
512 Elf_Internal_Sym * local_syms;
513 asection ** local_sections;
514 {
515 Elf_Internal_Shdr * symtab_hdr;
516 struct elf_link_hash_entry ** sym_hashes;
517 Elf_Internal_Rela * rel;
518 Elf_Internal_Rela * relend;
519
520 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
521 sym_hashes = elf_sym_hashes (input_bfd);
522 relend = relocs + input_section->reloc_count;
523
524 for (rel = relocs; rel < relend; rel ++)
525 {
526 reloc_howto_type * howto;
527 unsigned long r_symndx;
528 Elf_Internal_Sym * sym;
529 asection * sec;
530 struct elf_link_hash_entry * h;
531 bfd_vma relocation;
532 bfd_reloc_status_type r;
533 const char * name = NULL;
534 int r_type;
535
536 r_type = ELF32_R_TYPE (rel->r_info);
537
538 if ( r_type == R_FR30_GNU_VTINHERIT
539 || r_type == R_FR30_GNU_VTENTRY)
540 continue;
541
542 r_symndx = ELF32_R_SYM (rel->r_info);
543
544 if (info->relocateable)
545 {
546 /* This is a relocateable link. We don't have to change
547 anything, unless the reloc is against a section symbol,
548 in which case we have to adjust according to where the
549 section symbol winds up in the output section. */
550 if (r_symndx < symtab_hdr->sh_info)
551 {
552 sym = local_syms + r_symndx;
553
554 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
555 {
556 sec = local_sections [r_symndx];
557 rel->r_addend += sec->output_offset + sym->st_value;
558 }
559 }
560
561 continue;
562 }
563
564 /* This is a final link. */
565 howto = fr30_elf_howto_table + ELF32_R_TYPE (rel->r_info);
566 h = NULL;
567 sym = NULL;
568 sec = NULL;
569
570 if (r_symndx < symtab_hdr->sh_info)
571 {
572 sym = local_syms + r_symndx;
573 sec = local_sections [r_symndx];
574 relocation = (sec->output_section->vma
575 + sec->output_offset
576 + sym->st_value);
577
578 name = bfd_elf_string_from_elf_section
579 (input_bfd, symtab_hdr->sh_link, sym->st_name);
580 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
581 #if 0
582 fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
583 sec->name, name, sym->st_name,
584 sec->output_section->vma, sec->output_offset,
585 sym->st_value, rel->r_addend);
586 #endif
587 }
588 else
589 {
590 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
591
592 while (h->root.type == bfd_link_hash_indirect
593 || h->root.type == bfd_link_hash_warning)
594 h = (struct elf_link_hash_entry *) h->root.u.i.link;
595
596 name = h->root.root.string;
597
598 if (h->root.type == bfd_link_hash_defined
599 || h->root.type == bfd_link_hash_defweak)
600 {
601 sec = h->root.u.def.section;
602 relocation = (h->root.u.def.value
603 + sec->output_section->vma
604 + sec->output_offset);
605 #if 0
606 fprintf (stderr,
607 "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n",
608 sec->name, name, h->root.u.def.value,
609 sec->output_section->vma, sec->output_offset, relocation);
610 #endif
611 }
612 else if (h->root.type == bfd_link_hash_undefweak)
613 {
614 #if 0
615 fprintf (stderr, "undefined: sec: %s, name: %s\n",
616 sec->name, name);
617 #endif
618 relocation = 0;
619 }
620 else
621 {
622 if (! ((*info->callbacks->undefined_symbol)
623 (info, h->root.root.string, input_bfd,
624 input_section, rel->r_offset, true)))
625 return false;
626 #if 0
627 fprintf (stderr, "unknown: name: %s\n", name);
628 #endif
629 relocation = 0;
630 }
631 }
632
633 r = fr30_final_link_relocate (howto, input_bfd, input_section,
634 contents, rel, relocation);
635
636 if (r != bfd_reloc_ok)
637 {
638 const char * msg = (const char *) NULL;
639
640 switch (r)
641 {
642 case bfd_reloc_overflow:
643 r = info->callbacks->reloc_overflow
644 (info, name, howto->name, (bfd_vma) 0,
645 input_bfd, input_section, rel->r_offset);
646 break;
647
648 case bfd_reloc_undefined:
649 r = info->callbacks->undefined_symbol
650 (info, name, input_bfd, input_section, rel->r_offset,
651 true);
652 break;
653
654 case bfd_reloc_outofrange:
655 msg = _("internal error: out of range error");
656 break;
657
658 case bfd_reloc_notsupported:
659 msg = _("internal error: unsupported relocation error");
660 break;
661
662 case bfd_reloc_dangerous:
663 msg = _("internal error: dangerous relocation");
664 break;
665
666 default:
667 msg = _("internal error: unknown error");
668 break;
669 }
670
671 if (msg)
672 r = info->callbacks->warning
673 (info, msg, name, input_bfd, input_section, rel->r_offset);
674
675 if (! r)
676 return false;
677 }
678 }
679
680 return true;
681 }
682 \f
683 /* Return the section that should be marked against GC for a given
684 relocation. */
685
686 static asection *
687 fr30_elf_gc_mark_hook (abfd, info, rel, h, sym)
688 bfd * abfd;
689 struct bfd_link_info * info ATTRIBUTE_UNUSED;
690 Elf_Internal_Rela * rel;
691 struct elf_link_hash_entry * h;
692 Elf_Internal_Sym * sym;
693 {
694 if (h != NULL)
695 {
696 switch (ELF32_R_TYPE (rel->r_info))
697 {
698 case R_FR30_GNU_VTINHERIT:
699 case R_FR30_GNU_VTENTRY:
700 break;
701
702 default:
703 switch (h->root.type)
704 {
705 case bfd_link_hash_defined:
706 case bfd_link_hash_defweak:
707 return h->root.u.def.section;
708
709 case bfd_link_hash_common:
710 return h->root.u.c.p->section;
711
712 default:
713 break;
714 }
715 }
716 }
717 else
718 {
719 if (!(elf_bad_symtab (abfd)
720 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
721 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
722 && sym->st_shndx != SHN_COMMON))
723 {
724 return bfd_section_from_elf_index (abfd, sym->st_shndx);
725 }
726 }
727
728 return NULL;
729 }
730
731 /* Update the got entry reference counts for the section being removed. */
732
733 static boolean
734 fr30_elf_gc_sweep_hook (abfd, info, sec, relocs)
735 bfd * abfd ATTRIBUTE_UNUSED;
736 struct bfd_link_info * info ATTRIBUTE_UNUSED;
737 asection * sec ATTRIBUTE_UNUSED;
738 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED;
739 {
740 return true;
741 }
742
743 /* Look through the relocs for a section during the first phase.
744 Since we don't do .gots or .plts, we just need to consider the
745 virtual table relocs for gc. */
746
747 static boolean
748 fr30_elf_check_relocs (abfd, info, sec, relocs)
749 bfd *abfd;
750 struct bfd_link_info *info;
751 asection *sec;
752 const Elf_Internal_Rela *relocs;
753 {
754 Elf_Internal_Shdr *symtab_hdr;
755 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
756 const Elf_Internal_Rela *rel;
757 const Elf_Internal_Rela *rel_end;
758
759 if (info->relocateable)
760 return true;
761
762 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
763 sym_hashes = elf_sym_hashes (abfd);
764 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
765 if (!elf_bad_symtab (abfd))
766 sym_hashes_end -= symtab_hdr->sh_info;
767
768 rel_end = relocs + sec->reloc_count;
769 for (rel = relocs; rel < rel_end; rel++)
770 {
771 struct elf_link_hash_entry *h;
772 unsigned long r_symndx;
773
774 r_symndx = ELF32_R_SYM (rel->r_info);
775 if (r_symndx < symtab_hdr->sh_info)
776 h = NULL;
777 else
778 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
779
780 switch (ELF32_R_TYPE (rel->r_info))
781 {
782 /* This relocation describes the C++ object vtable hierarchy.
783 Reconstruct it for later use during GC. */
784 case R_FR30_GNU_VTINHERIT:
785 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
786 return false;
787 break;
788
789 /* This relocation describes which C++ vtable entries are actually
790 used. Record for later use during GC. */
791 case R_FR30_GNU_VTENTRY:
792 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
793 return false;
794 break;
795 }
796 }
797
798 return true;
799 }
800 \f
801 #define ELF_ARCH bfd_arch_fr30
802 #define ELF_MACHINE_CODE EM_FR30
803 #define ELF_MACHINE_ALT1 EM_CYGNUS_FR30
804 #define ELF_MAXPAGESIZE 0x1000
805
806 #define TARGET_BIG_SYM bfd_elf32_fr30_vec
807 #define TARGET_BIG_NAME "elf32-fr30"
808
809 #define elf_info_to_howto_rel NULL
810 #define elf_info_to_howto fr30_info_to_howto_rela
811 #define elf_backend_relocate_section fr30_elf_relocate_section
812 #define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook
813 #define elf_backend_gc_sweep_hook fr30_elf_gc_sweep_hook
814 #define elf_backend_check_relocs fr30_elf_check_relocs
815
816 #define elf_backend_can_gc_sections 1
817
818 #define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup
819
820 #include "elf32-target.h"
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