source: trunk/src/binutils/bfd/elf32-fr30.c@ 73

Last change on this file since 73 was 10, checked in by bird, 23 years ago

Initial revision
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Line 
1/* FR30-specific support for 32-bit ELF.
2 Copyright 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
3
4This file is part of BFD, the Binary File Descriptor library.
5
6This program is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2 of the License, or
9(at your option) any later version.
10
11This program is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with this program; if not, write to the Free Software
18Foundation, 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. */
27static bfd_reloc_status_type fr30_elf_i20_reloc
28 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
29static bfd_reloc_status_type fr30_elf_i32_reloc
30 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
31static reloc_howto_type * fr30_reloc_type_lookup
32 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
33static void fr30_info_to_howto_rela
34 PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
35static boolean fr30_elf_relocate_section
36 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
37static bfd_reloc_status_type fr30_final_link_relocate
38 PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma));
39static boolean fr30_elf_gc_sweep_hook
40 PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *));
41static asection * fr30_elf_gc_mark_hook
42 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, struct elf_link_hash_entry *, Elf_Internal_Sym *));
43
44static reloc_howto_type fr30_elf_howto_table [] =
45{
46 /* This reloc does nothing. */
47 HOWTO (R_FR30_NONE, /* type */
48 0, /* rightshift */
49 2, /* size (0 = byte, 1 = short, 2 = long) */
50 32, /* bitsize */
51 false, /* pc_relative */
52 0, /* bitpos */
53 complain_overflow_bitfield, /* complain_on_overflow */
54 bfd_elf_generic_reloc, /* special_function */
55 "R_FR30_NONE", /* name */
56 false, /* partial_inplace */
57 0, /* src_mask */
58 0, /* dst_mask */
59 false), /* pcrel_offset */
60
61 /* An 8 bit absolute relocation. */
62 HOWTO (R_FR30_8, /* type */
63 0, /* rightshift */
64 1, /* size (0 = byte, 1 = short, 2 = long) */
65 8, /* bitsize */
66 false, /* pc_relative */
67 4, /* bitpos */
68 complain_overflow_bitfield, /* complain_on_overflow */
69 bfd_elf_generic_reloc, /* special_function */
70 "R_FR30_8", /* name */
71 true, /* partial_inplace */
72 0x0000, /* src_mask */
73 0x0ff0, /* dst_mask */
74 false), /* pcrel_offset */
75
76 /* A 20 bit absolute relocation. */
77 HOWTO (R_FR30_20, /* type */
78 0, /* rightshift */
79 2, /* size (0 = byte, 1 = short, 2 = long) */
80 20, /* bitsize */
81 false, /* pc_relative */
82 0, /* bitpos */
83 complain_overflow_bitfield, /* complain_on_overflow */
84 fr30_elf_i20_reloc, /* special_function */
85 "R_FR30_20", /* name */
86 true, /* partial_inplace */
87 0x00000000, /* src_mask */
88 0x00f0ffff, /* dst_mask */
89 false), /* pcrel_offset */
90
91 /* A 32 bit absolute relocation. */
92 HOWTO (R_FR30_32, /* type */
93 0, /* rightshift */
94 2, /* size (0 = byte, 1 = short, 2 = long) */
95 32, /* bitsize */
96 false, /* pc_relative */
97 0, /* bitpos */
98 complain_overflow_bitfield, /* complain_on_overflow */
99 bfd_elf_generic_reloc, /* special_function */
100 "R_FR30_32", /* name */
101 true, /* partial_inplace */
102 0x00000000, /* src_mask */
103 0xffffffff, /* dst_mask */
104 false), /* pcrel_offset */
105
106 /* A 32 bit into 48 bits absolute relocation. */
107 HOWTO (R_FR30_48, /* type */
108 0, /* rightshift */
109 2, /* size (0 = byte, 1 = short, 2 = long) */
110 32, /* bitsize */
111 false, /* pc_relative */
112 0, /* bitpos */
113 complain_overflow_bitfield, /* complain_on_overflow */
114 fr30_elf_i32_reloc, /* special_function */
115 "R_FR30_48", /* name */
116 true, /* partial_inplace */
117 0x00000000, /* src_mask */
118 0xffffffff, /* dst_mask */
119 false), /* pcrel_offset */
120
121 /* A 6 bit absolute relocation. */
122 HOWTO (R_FR30_6_IN_4, /* type */
123 2, /* rightshift */
124 1, /* size (0 = byte, 1 = short, 2 = long) */
125 6, /* bitsize */
126 false, /* pc_relative */
127 4, /* bitpos */
128 complain_overflow_unsigned, /* complain_on_overflow */
129 bfd_elf_generic_reloc, /* special_function */
130 "R_FR30_6_IN_4", /* name */
131 true, /* partial_inplace */
132 0x0000, /* src_mask */
133 0x00f0, /* dst_mask */
134 false), /* pcrel_offset */
135
136 /* An 8 bit absolute relocation. */
137 HOWTO (R_FR30_8_IN_8, /* type */
138 0, /* rightshift */
139 1, /* size (0 = byte, 1 = short, 2 = long) */
140 8, /* bitsize */
141 false, /* pc_relative */
142 4, /* bitpos */
143 complain_overflow_signed, /* complain_on_overflow */
144 bfd_elf_generic_reloc,/* special_function */
145 "R_FR30_8_IN_8", /* name */
146 true, /* partial_inplace */
147 0x0000, /* src_mask */
148 0x0ff0, /* dst_mask */
149 false), /* pcrel_offset */
150
151 /* A 9 bit absolute relocation. */
152 HOWTO (R_FR30_9_IN_8, /* type */
153 1, /* rightshift */
154 1, /* size (0 = byte, 1 = short, 2 = long) */
155 9, /* bitsize */
156 false, /* pc_relative */
157 4, /* bitpos */
158 complain_overflow_signed, /* complain_on_overflow */
159 bfd_elf_generic_reloc,/* special_function */
160 "R_FR30_9_IN_8", /* name */
161 true, /* partial_inplace */
162 0x0000, /* src_mask */
163 0x0ff0, /* dst_mask */
164 false), /* pcrel_offset */
165
166 /* A 10 bit absolute relocation. */
167 HOWTO (R_FR30_10_IN_8, /* type */
168 2, /* rightshift */
169 1, /* size (0 = byte, 1 = short, 2 = long) */
170 10, /* bitsize */
171 false, /* pc_relative */
172 4, /* bitpos */
173 complain_overflow_signed, /* complain_on_overflow */
174 bfd_elf_generic_reloc,/* special_function */
175 "R_FR30_10_IN_8", /* name */
176 true, /* partial_inplace */
177 0x0000, /* src_mask */
178 0x0ff0, /* dst_mask */
179 false), /* pcrel_offset */
180
181 /* A PC relative 9 bit relocation, right shifted by 1. */
182 HOWTO (R_FR30_9_PCREL, /* type */
183 1, /* rightshift */
184 1, /* size (0 = byte, 1 = short, 2 = long) */
185 9, /* bitsize */
186 true, /* pc_relative */
187 0, /* bitpos */
188 complain_overflow_signed, /* complain_on_overflow */
189 bfd_elf_generic_reloc, /* special_function */
190 "R_FR30_9_PCREL", /* name */
191 false, /* partial_inplace */
192 0x0000, /* src_mask */
193 0x00ff, /* dst_mask */
194 false), /* pcrel_offset */
195
196 /* A PC relative 12 bit relocation, right shifted by 1. */
197 HOWTO (R_FR30_12_PCREL, /* type */
198 1, /* rightshift */
199 1, /* size (0 = byte, 1 = short, 2 = long) */
200 12, /* bitsize */
201 true, /* pc_relative */
202 0, /* bitpos */
203 complain_overflow_signed, /* complain_on_overflow */
204 bfd_elf_generic_reloc, /* special_function */
205 "R_FR30_12_PCREL", /* name */
206 false, /* partial_inplace */
207 0x0000, /* src_mask */
208 0x07ff, /* dst_mask */
209 false), /* pcrel_offset */
210 /* GNU extension to record C++ vtable hierarchy */
211 HOWTO (R_FR30_GNU_VTINHERIT, /* type */
212 0, /* rightshift */
213 2, /* size (0 = byte, 1 = short, 2 = long) */
214 0, /* bitsize */
215 false, /* pc_relative */
216 0, /* bitpos */
217 complain_overflow_dont, /* complain_on_overflow */
218 NULL, /* special_function */
219 "R_FR30_GNU_VTINHERIT", /* name */
220 false, /* partial_inplace */
221 0, /* src_mask */
222 0, /* dst_mask */
223 false), /* pcrel_offset */
224
225 /* GNU extension to record C++ vtable member usage */
226 HOWTO (R_FR30_GNU_VTENTRY, /* type */
227 0, /* rightshift */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
229 0, /* bitsize */
230 false, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
234 "R_FR30_GNU_VTENTRY", /* name */
235 false, /* partial_inplace */
236 0, /* src_mask */
237 0, /* dst_mask */
238 false), /* pcrel_offset */
239};
240
241
242/* Utility to actually perform an R_FR30_20 reloc. */
243
244static bfd_reloc_status_type
245fr30_elf_i20_reloc (abfd, reloc_entry, symbol, data,
246 input_section, output_bfd, error_message)
247 bfd * abfd;
248 arelent * reloc_entry;
249 asymbol * symbol;
250 PTR data;
251 asection * input_section;
252 bfd * output_bfd;
253 char ** error_message ATTRIBUTE_UNUSED;
254{
255 bfd_vma relocation;
256 unsigned long x;
257
258 /* This part is from bfd_elf_generic_reloc. */
259 if (output_bfd != (bfd *) NULL
260 && (symbol->flags & BSF_SECTION_SYM) == 0
261 && (! reloc_entry->howto->partial_inplace
262 || reloc_entry->addend == 0))
263 {
264 reloc_entry->address += input_section->output_offset;
265 return bfd_reloc_ok;
266 }
267
268 if (output_bfd != NULL)
269 /* FIXME: See bfd_perform_relocation. Is this right? */
270 return bfd_reloc_ok;
271
272 relocation =
273 symbol->value
274 + symbol->section->output_section->vma
275 + symbol->section->output_offset
276 + reloc_entry->addend;
277
278 if (relocation > (((bfd_vma) 1 << 20) - 1))
279 return bfd_reloc_overflow;
280
281 x = bfd_get_32 (abfd, (char *) data + reloc_entry->address);
282 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
283 bfd_put_32 (abfd, x, (char *) data + reloc_entry->address);
284
285 return bfd_reloc_ok;
286}
287
288
289/* Utility to actually perform a R_FR30_48 reloc. */
290
291static bfd_reloc_status_type
292fr30_elf_i32_reloc (abfd, reloc_entry, symbol, data,
293 input_section, output_bfd, error_message)
294 bfd * abfd;
295 arelent * reloc_entry;
296 asymbol * symbol;
297 PTR data;
298 asection * input_section;
299 bfd * output_bfd;
300 char ** error_message ATTRIBUTE_UNUSED;
301{
302 bfd_vma relocation;
303
304 /* This part is from bfd_elf_generic_reloc. */
305 if (output_bfd != (bfd *) NULL
306 && (symbol->flags & BSF_SECTION_SYM) == 0
307 && (! reloc_entry->howto->partial_inplace
308 || reloc_entry->addend == 0))
309 {
310 reloc_entry->address += input_section->output_offset;
311 return bfd_reloc_ok;
312 }
313
314 if (output_bfd != NULL)
315 /* FIXME: See bfd_perform_relocation. Is this right? */
316 return bfd_reloc_ok;
317
318 relocation =
319 symbol->value
320 + symbol->section->output_section->vma
321 + symbol->section->output_offset
322 + reloc_entry->addend;
323
324 bfd_put_32 (abfd, relocation, (char *) data + reloc_entry->address + 2);
325
326 return bfd_reloc_ok;
327}
328
329
330/* Map BFD reloc types to FR30 ELF reloc types. */
331
332struct fr30_reloc_map
333{
334 bfd_reloc_code_real_type bfd_reloc_val;
335 unsigned int fr30_reloc_val;
336};
337
338static const struct fr30_reloc_map fr30_reloc_map [] =
339{
340 { BFD_RELOC_NONE, R_FR30_NONE },
341 { BFD_RELOC_8, R_FR30_8 },
342 { BFD_RELOC_FR30_20, R_FR30_20 },
343 { BFD_RELOC_32, R_FR30_32 },
344 { BFD_RELOC_FR30_48, R_FR30_48 },
345 { BFD_RELOC_FR30_6_IN_4, R_FR30_6_IN_4 },
346 { BFD_RELOC_FR30_8_IN_8, R_FR30_8_IN_8 },
347 { BFD_RELOC_FR30_9_IN_8, R_FR30_9_IN_8 },
348 { BFD_RELOC_FR30_10_IN_8, R_FR30_10_IN_8 },
349 { BFD_RELOC_FR30_9_PCREL, R_FR30_9_PCREL },
350 { BFD_RELOC_FR30_12_PCREL, R_FR30_12_PCREL },
351 { BFD_RELOC_VTABLE_INHERIT, R_FR30_GNU_VTINHERIT },
352 { BFD_RELOC_VTABLE_ENTRY, R_FR30_GNU_VTENTRY },
353};
354
355static reloc_howto_type *
356fr30_reloc_type_lookup (abfd, code)
357 bfd * abfd ATTRIBUTE_UNUSED;
358 bfd_reloc_code_real_type code;
359{
360 unsigned int i;
361
362 for (i = sizeof (fr30_reloc_map) / sizeof (fr30_reloc_map[0]);
363 --i;)
364 if (fr30_reloc_map [i].bfd_reloc_val == code)
365 return & fr30_elf_howto_table [fr30_reloc_map[i].fr30_reloc_val];
366
367 return NULL;
368}
369
370/* Set the howto pointer for an FR30 ELF reloc. */
371
372static void
373fr30_info_to_howto_rela (abfd, cache_ptr, dst)
374 bfd * abfd ATTRIBUTE_UNUSED;
375 arelent * cache_ptr;
376 Elf32_Internal_Rela * dst;
377{
378 unsigned int r_type;
379
380 r_type = ELF32_R_TYPE (dst->r_info);
381 BFD_ASSERT (r_type < (unsigned int) R_FR30_max);
382 cache_ptr->howto = & fr30_elf_howto_table [r_type];
383}
384
385
386/* Perform a single relocation. By default we use the standard BFD
387 routines, but a few relocs, we have to do them ourselves. */
388
389static bfd_reloc_status_type
390fr30_final_link_relocate (howto, input_bfd, input_section, contents, rel, relocation)
391 reloc_howto_type * howto;
392 bfd * input_bfd;
393 asection * input_section;
394 bfd_byte * contents;
395 Elf_Internal_Rela * rel;
396 bfd_vma relocation;
397{
398 bfd_reloc_status_type r = bfd_reloc_ok;
399 bfd_vma x;
400 bfd_signed_vma srel;
401
402 switch (howto->type)
403 {
404 case R_FR30_20:
405 contents += rel->r_offset;
406 relocation += rel->r_addend;
407
408 if (relocation > ((1 << 20) - 1))
409 return bfd_reloc_overflow;
410
411 x = bfd_get_32 (input_bfd, contents);
412 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
413 bfd_put_32 (input_bfd, x, contents);
414 break;
415
416 case R_FR30_48:
417 contents += rel->r_offset + 2;
418 relocation += rel->r_addend;
419 bfd_put_32 (input_bfd, relocation, contents);
420 break;
421
422 case R_FR30_9_PCREL:
423 contents += rel->r_offset + 1;
424 srel = (bfd_signed_vma) relocation;
425 srel += rel->r_addend;
426 srel -= rel->r_offset;
427 srel -= 2; /* Branch instructions add 2 to the PC... */
428 srel -= (input_section->output_section->vma +
429 input_section->output_offset);
430
431 if (srel & 1)
432 return bfd_reloc_outofrange;
433 if (srel > ((1 << 8) - 1) || (srel < - (1 << 8)))
434 return bfd_reloc_overflow;
435
436 bfd_put_8 (input_bfd, srel >> 1, contents);
437 break;
438
439 case R_FR30_12_PCREL:
440 contents += rel->r_offset;
441 srel = (bfd_signed_vma) relocation;
442 srel += rel->r_addend;
443 srel -= rel->r_offset;
444 srel -= 2; /* Branch instructions add 2 to the PC... */
445 srel -= (input_section->output_section->vma +
446 input_section->output_offset);
447
448 if (srel & 1)
449 return bfd_reloc_outofrange;
450 if (srel > ((1 << 11) - 1) || (srel < - (1 << 11)))
451 return bfd_reloc_overflow;
452
453 x = bfd_get_16 (input_bfd, contents);
454 x = (x & 0xf800) | ((srel >> 1) & 0x7ff);
455 bfd_put_16 (input_bfd, x, contents);
456 break;
457
458 default:
459 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
460 contents, rel->r_offset,
461 relocation, rel->r_addend);
462 }
463
464 return r;
465}
466
467
468/* Relocate an FR30 ELF section.
469 There is some attempt to make this function usable for many architectures,
470 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
471 if only to serve as a learning tool.
472
473 The RELOCATE_SECTION function is called by the new ELF backend linker
474 to handle the relocations for a section.
475
476 The relocs are always passed as Rela structures; if the section
477 actually uses Rel structures, the r_addend field will always be
478 zero.
479
480 This function is responsible for adjusting the section contents as
481 necessary, and (if using Rela relocs and generating a relocateable
482 output file) adjusting the reloc addend as necessary.
483
484 This function does not have to worry about setting the reloc
485 address or the reloc symbol index.
486
487 LOCAL_SYMS is a pointer to the swapped in local symbols.
488
489 LOCAL_SECTIONS is an array giving the section in the input file
490 corresponding to the st_shndx field of each local symbol.
491
492 The global hash table entry for the global symbols can be found
493 via elf_sym_hashes (input_bfd).
494
495 When generating relocateable output, this function must handle
496 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
497 going to be the section symbol corresponding to the output
498 section, which means that the addend must be adjusted
499 accordingly. */
500
501static boolean
502fr30_elf_relocate_section (output_bfd, info, input_bfd, input_section,
503 contents, relocs, local_syms, local_sections)
504 bfd * output_bfd ATTRIBUTE_UNUSED;
505 struct bfd_link_info * info;
506 bfd * input_bfd;
507 asection * input_section;
508 bfd_byte * contents;
509 Elf_Internal_Rela * relocs;
510 Elf_Internal_Sym * local_syms;
511 asection ** local_sections;
512{
513 Elf_Internal_Shdr * symtab_hdr;
514 struct elf_link_hash_entry ** sym_hashes;
515 Elf_Internal_Rela * rel;
516 Elf_Internal_Rela * relend;
517
518 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
519 sym_hashes = elf_sym_hashes (input_bfd);
520 relend = relocs + input_section->reloc_count;
521
522 for (rel = relocs; rel < relend; rel ++)
523 {
524 reloc_howto_type * howto;
525 unsigned long r_symndx;
526 Elf_Internal_Sym * sym;
527 asection * sec;
528 struct elf_link_hash_entry * h;
529 bfd_vma relocation;
530 bfd_reloc_status_type r;
531 const char * name = NULL;
532 int r_type;
533
534 r_type = ELF32_R_TYPE (rel->r_info);
535
536 if ( r_type == R_FR30_GNU_VTINHERIT
537 || r_type == R_FR30_GNU_VTENTRY)
538 continue;
539
540 r_symndx = ELF32_R_SYM (rel->r_info);
541
542 if (info->relocateable)
543 {
544 /* This is a relocateable link. We don't have to change
545 anything, unless the reloc is against a section symbol,
546 in which case we have to adjust according to where the
547 section symbol winds up in the output section. */
548 if (r_symndx < symtab_hdr->sh_info)
549 {
550 sym = local_syms + r_symndx;
551
552 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
553 {
554 sec = local_sections [r_symndx];
555 rel->r_addend += sec->output_offset + sym->st_value;
556 }
557 }
558
559 continue;
560 }
561
562 /* This is a final link. */
563 howto = fr30_elf_howto_table + ELF32_R_TYPE (rel->r_info);
564 h = NULL;
565 sym = NULL;
566 sec = NULL;
567
568 if (r_symndx < symtab_hdr->sh_info)
569 {
570 sym = local_syms + r_symndx;
571 sec = local_sections [r_symndx];
572 relocation = (sec->output_section->vma
573 + sec->output_offset
574 + sym->st_value);
575
576 name = bfd_elf_string_from_elf_section
577 (input_bfd, symtab_hdr->sh_link, sym->st_name);
578 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
579#if 0
580 fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
581 sec->name, name, sym->st_name,
582 sec->output_section->vma, sec->output_offset,
583 sym->st_value, rel->r_addend);
584#endif
585 }
586 else
587 {
588 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
589
590 while (h->root.type == bfd_link_hash_indirect
591 || h->root.type == bfd_link_hash_warning)
592 h = (struct elf_link_hash_entry *) h->root.u.i.link;
593
594 name = h->root.root.string;
595
596 if (h->root.type == bfd_link_hash_defined
597 || h->root.type == bfd_link_hash_defweak)
598 {
599 sec = h->root.u.def.section;
600 relocation = (h->root.u.def.value
601 + sec->output_section->vma
602 + sec->output_offset);
603#if 0
604 fprintf (stderr,
605 "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n",
606 sec->name, name, h->root.u.def.value,
607 sec->output_section->vma, sec->output_offset, relocation);
608#endif
609 }
610 else if (h->root.type == bfd_link_hash_undefweak)
611 {
612#if 0
613 fprintf (stderr, "undefined: sec: %s, name: %s\n",
614 sec->name, name);
615#endif
616 relocation = 0;
617 }
618 else
619 {
620 if (! ((*info->callbacks->undefined_symbol)
621 (info, h->root.root.string, input_bfd,
622 input_section, rel->r_offset, true)))
623 return false;
624#if 0
625 fprintf (stderr, "unknown: name: %s\n", name);
626#endif
627 relocation = 0;
628 }
629 }
630
631 r = fr30_final_link_relocate (howto, input_bfd, input_section,
632 contents, rel, relocation);
633
634 if (r != bfd_reloc_ok)
635 {
636 const char * msg = (const char *) NULL;
637
638 switch (r)
639 {
640 case bfd_reloc_overflow:
641 r = info->callbacks->reloc_overflow
642 (info, name, howto->name, (bfd_vma) 0,
643 input_bfd, input_section, rel->r_offset);
644 break;
645
646 case bfd_reloc_undefined:
647 r = info->callbacks->undefined_symbol
648 (info, name, input_bfd, input_section, rel->r_offset,
649 true);
650 break;
651
652 case bfd_reloc_outofrange:
653 msg = _("internal error: out of range error");
654 break;
655
656 case bfd_reloc_notsupported:
657 msg = _("internal error: unsupported relocation error");
658 break;
659
660 case bfd_reloc_dangerous:
661 msg = _("internal error: dangerous relocation");
662 break;
663
664 default:
665 msg = _("internal error: unknown error");
666 break;
667 }
668
669 if (msg)
670 r = info->callbacks->warning
671 (info, msg, name, input_bfd, input_section, rel->r_offset);
672
673 if (! r)
674 return false;
675 }
676 }
677
678 return true;
679}
680
681
682/* Return the section that should be marked against GC for a given
683 relocation. */
684
685static asection *
686fr30_elf_gc_mark_hook (abfd, info, rel, h, sym)
687 bfd * abfd;
688 struct bfd_link_info * info ATTRIBUTE_UNUSED;
689 Elf_Internal_Rela * rel;
690 struct elf_link_hash_entry * h;
691 Elf_Internal_Sym * sym;
692{
693 if (h != NULL)
694 {
695 switch (ELF32_R_TYPE (rel->r_info))
696 {
697 case R_FR30_GNU_VTINHERIT:
698 case R_FR30_GNU_VTENTRY:
699 break;
700
701 default:
702 switch (h->root.type)
703 {
704 case bfd_link_hash_defined:
705 case bfd_link_hash_defweak:
706 return h->root.u.def.section;
707
708 case bfd_link_hash_common:
709 return h->root.u.c.p->section;
710
711 default:
712 break;
713 }
714 }
715 }
716 else
717 {
718 if (!(elf_bad_symtab (abfd)
719 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
720 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
721 && sym->st_shndx != SHN_COMMON))
722 {
723 return bfd_section_from_elf_index (abfd, sym->st_shndx);
724 }
725 }
726
727 return NULL;
728}
729
730/* Update the got entry reference counts for the section being removed. */
731
732static boolean
733fr30_elf_gc_sweep_hook (abfd, info, sec, relocs)
734 bfd * abfd ATTRIBUTE_UNUSED;
735 struct bfd_link_info * info ATTRIBUTE_UNUSED;
736 asection * sec ATTRIBUTE_UNUSED;
737 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED;
738{
739 return true;
740}
741
742/* Look through the relocs for a section during the first phase.
743 Since we don't do .gots or .plts, we just need to consider the
744 virtual table relocs for gc. */
745
746static boolean
747fr30_elf_check_relocs (abfd, info, sec, relocs)
748 bfd *abfd;
749 struct bfd_link_info *info;
750 asection *sec;
751 const Elf_Internal_Rela *relocs;
752{
753 Elf_Internal_Shdr *symtab_hdr;
754 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
755 const Elf_Internal_Rela *rel;
756 const Elf_Internal_Rela *rel_end;
757
758 if (info->relocateable)
759 return true;
760
761 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
762 sym_hashes = elf_sym_hashes (abfd);
763 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
764 if (!elf_bad_symtab (abfd))
765 sym_hashes_end -= symtab_hdr->sh_info;
766
767 rel_end = relocs + sec->reloc_count;
768 for (rel = relocs; rel < rel_end; rel++)
769 {
770 struct elf_link_hash_entry *h;
771 unsigned long r_symndx;
772
773 r_symndx = ELF32_R_SYM (rel->r_info);
774 if (r_symndx < symtab_hdr->sh_info)
775 h = NULL;
776 else
777 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
778
779 switch (ELF32_R_TYPE (rel->r_info))
780 {
781 /* This relocation describes the C++ object vtable hierarchy.
782 Reconstruct it for later use during GC. */
783 case R_FR30_GNU_VTINHERIT:
784 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
785 return false;
786 break;
787
788 /* This relocation describes which C++ vtable entries are actually
789 used. Record for later use during GC. */
790 case R_FR30_GNU_VTENTRY:
791 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
792 return false;
793 break;
794 }
795 }
796
797 return true;
798}
799
800
801#define ELF_ARCH bfd_arch_fr30
802#define ELF_MACHINE_CODE EM_CYGNUS_FR30
803#define ELF_MAXPAGESIZE 0x1000
804
805#define TARGET_BIG_SYM bfd_elf32_fr30_vec
806#define TARGET_BIG_NAME "elf32-fr30"
807
808#define elf_info_to_howto_rel NULL
809#define elf_info_to_howto fr30_info_to_howto_rela
810#define elf_backend_relocate_section fr30_elf_relocate_section
811#define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook
812#define elf_backend_gc_sweep_hook fr30_elf_gc_sweep_hook
813#define elf_backend_check_relocs fr30_elf_check_relocs
814
815#define elf_backend_can_gc_sections 1
816
817#define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup
818
819#include "elf32-target.h"
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