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[deliverable/binutils-gdb.git] / bfd / elf32-fr30.c
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252b5132 1/* FR30-specific support for 32-bit ELF.
7898deda 2 Copyright 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
252b5132
RH		 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));
6609fa74 33static void fr30_info_to_howto_rela
252b5132 34 PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
6609fa74 35static boolean fr30_elf_relocate_section
dc810e39
AM		 36 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
37 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
252b5132 38static bfd_reloc_status_type fr30_final_link_relocate
dc810e39
AM		 39 PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
40 Elf_Internal_Rela *, bfd_vma));
252b5132 41static boolean fr30_elf_gc_sweep_hook
dc810e39
AM		 42 PARAMS ((bfd *, struct bfd_link_info *, asection *,
43 const Elf_Internal_Rela *));
252b5132 44static asection * fr30_elf_gc_mark_hook
dc810e39
AM		 45 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
46 struct elf_link_hash_entry *, Elf_Internal_Sym *));
47static boolean fr30_elf_check_relocs
48 PARAMS ((bfd *, struct bfd_link_info *, asection *,
49 const Elf_Internal_Rela *));
252b5132
RH		 50
51static 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 */
6609fa74 142
252b5132
RH		 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 */
6609fa74 157
252b5132
RH		 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 */
6609fa74 172
252b5132
RH		 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 */
252b5132
RH		 246};
247\f
248/* Utility to actually perform an R_FR30_20 reloc. */
249
250static bfd_reloc_status_type
251fr30_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;
5f771d47 259 char ** error_message ATTRIBUTE_UNUSED;
252b5132
RH		 260{
261 bfd_vma relocation;
262 unsigned long x;
6609fa74 263
252b5132
RH		 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
fc633e5b 284 if (relocation > (((bfd_vma) 1 << 20) - 1))
252b5132
RH		 285 return bfd_reloc_overflow;
286
23ccc829 287 x = bfd_get_32 (abfd, (char *) data + reloc_entry->address);
252b5132 288 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
dc810e39 289 bfd_put_32 (abfd, (bfd_vma) x, (char *) data + reloc_entry->address);
252b5132
RH		 290
291 return bfd_reloc_ok;
292}
252b5132
RH		 293\f
294/* Utility to actually perform a R_FR30_48 reloc. */
295
296static bfd_reloc_status_type
297fr30_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;
5f771d47 305 char ** error_message ATTRIBUTE_UNUSED;
252b5132
RH		 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
23ccc829 329 bfd_put_32 (abfd, relocation, (char *) data + reloc_entry->address + 2);
252b5132
RH		 330
331 return bfd_reloc_ok;
332}
333\f
334/* Map BFD reloc types to FR30 ELF reloc types. */
335
336struct fr30_reloc_map
337{
338 bfd_reloc_code_real_type bfd_reloc_val;
339 unsigned int fr30_reloc_val;
340};
341
342static 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
359static reloc_howto_type *
360fr30_reloc_type_lookup (abfd, code)
5f771d47 361 bfd * abfd ATTRIBUTE_UNUSED;
252b5132
RH		 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];
6609fa74 370
252b5132
RH		 371 return NULL;
372}
373
374/* Set the howto pointer for an FR30 ELF reloc. */
375
376static void
377fr30_info_to_howto_rela (abfd, cache_ptr, dst)
5f771d47 378 bfd * abfd ATTRIBUTE_UNUSED;
252b5132
RH		 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
392static bfd_reloc_status_type
393fr30_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;
6609fa74 404
252b5132
RH		 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;
6609fa74 413
252b5132
RH		 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;
6609fa74 418
252b5132
RH		 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;
6609fa74 430 srel -= 2; /* Branch instructions add 2 to the PC... */
252b5132
RH		 431 srel -= (input_section->output_section->vma +
432 input_section->output_offset);
6609fa74 433
252b5132
RH		 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;
6609fa74 447 srel -= 2; /* Branch instructions add 2 to the PC... */
252b5132
RH		 448 srel -= (input_section->output_section->vma +
449 input_section->output_offset);
6609fa74 450
252b5132
RH		 451 if (srel & 1)
452 return bfd_reloc_outofrange;
453 if (srel > ((1 << 11) - 1) || (srel < - (1 << 11)))
454 return bfd_reloc_overflow;
6609fa74 455
252b5132
RH		 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}
252b5132
RH		 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
503static boolean
504fr30_elf_relocate_section (output_bfd, info, input_bfd, input_section,
505 contents, relocs, local_syms, local_sections)
f8df10f4 506 bfd * output_bfd;
252b5132
RH		 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;
6609fa74 535
252b5132 536 r_type = ELF32_R_TYPE (rel->r_info);
6609fa74 537
252b5132
RH		 538 if ( r_type == R_FR30_GNU_VTINHERIT
539 || r_type == R_FR30_GNU_VTENTRY)
540 continue;
6609fa74 541
252b5132
RH		 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;
6609fa74 553
252b5132
RH		 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;
6609fa74 569
252b5132
RH		 570 if (r_symndx < symtab_hdr->sh_info)
571 {
572 sym = local_syms + r_symndx;
573 sec = local_sections [r_symndx];
f8df10f4 574 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
6609fa74 575
252b5132
RH		 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];
6609fa74 589
252b5132
RH		 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;
6609fa74 595
252b5132
RH		 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,
5cc7c785 622 input_section, rel->r_offset, true)))
252b5132
RH		 623 return false;
624#if 0
625 fprintf (stderr, "unknown: name: %s\n", name);
626#endif
627 relocation = 0;
628 }
629 }
6609fa74 630
252b5132
RH		 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;
6609fa74 645
252b5132
RH		 646 case bfd_reloc_undefined:
647 r = info->callbacks->undefined_symbol
5cc7c785
L		 648 (info, name, input_bfd, input_section, rel->r_offset,
649 true);
252b5132 650 break;
6609fa74 651
252b5132
RH		 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\f
681/* Return the section that should be marked against GC for a given
682 relocation. */
683
684static asection *
685fr30_elf_gc_mark_hook (abfd, info, rel, h, sym)
686 bfd * abfd;
5f771d47 687 struct bfd_link_info * info ATTRIBUTE_UNUSED;
252b5132
RH		 688 Elf_Internal_Rela * rel;
689 struct elf_link_hash_entry * h;
690 Elf_Internal_Sym * sym;
691{
692 if (h != NULL)
693 {
694 switch (ELF32_R_TYPE (rel->r_info))
695 {
696 case R_FR30_GNU_VTINHERIT:
697 case R_FR30_GNU_VTENTRY:
698 break;
699
700 default:
701 switch (h->root.type)
702 {
703 case bfd_link_hash_defined:
704 case bfd_link_hash_defweak:
705 return h->root.u.def.section;
706
707 case bfd_link_hash_common:
708 return h->root.u.c.p->section;
e049a0de
ILT		 709
710 default:
711 break;
252b5132
RH		 712 }
713 }
714 }
715 else
716 {
9ad5cbcf 717 return bfd_section_from_elf_index (abfd, sym->st_shndx);
252b5132
RH		 718 }
719
720 return NULL;
721}
722
723/* Update the got entry reference counts for the section being removed. */
724
725static boolean
726fr30_elf_gc_sweep_hook (abfd, info, sec, relocs)
5f771d47
ILT		 727 bfd * abfd ATTRIBUTE_UNUSED;
728 struct bfd_link_info * info ATTRIBUTE_UNUSED;
729 asection * sec ATTRIBUTE_UNUSED;
730 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED;
252b5132
RH		 731{
732 return true;
733}
734
735/* Look through the relocs for a section during the first phase.
736 Since we don't do .gots or .plts, we just need to consider the
737 virtual table relocs for gc. */
6609fa74 738
252b5132
RH		 739static boolean
740fr30_elf_check_relocs (abfd, info, sec, relocs)
741 bfd *abfd;
742 struct bfd_link_info *info;
743 asection *sec;
744 const Elf_Internal_Rela *relocs;
745{
746 Elf_Internal_Shdr *symtab_hdr;
747 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
748 const Elf_Internal_Rela *rel;
749 const Elf_Internal_Rela *rel_end;
6609fa74 750
252b5132
RH		 751 if (info->relocateable)
752 return true;
6609fa74 753
252b5132
RH		 754 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
755 sym_hashes = elf_sym_hashes (abfd);
6609fa74 756 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
252b5132
RH		 757 if (!elf_bad_symtab (abfd))
758 sym_hashes_end -= symtab_hdr->sh_info;
6609fa74 759
252b5132
RH		 760 rel_end = relocs + sec->reloc_count;
761 for (rel = relocs; rel < rel_end; rel++)
762 {
763 struct elf_link_hash_entry *h;
764 unsigned long r_symndx;
6609fa74 765
252b5132
RH		 766 r_symndx = ELF32_R_SYM (rel->r_info);
767 if (r_symndx < symtab_hdr->sh_info)
768 h = NULL;
769 else
770 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6609fa74 771
252b5132
RH		 772 switch (ELF32_R_TYPE (rel->r_info))
773 {
774 /* This relocation describes the C++ object vtable hierarchy.
775 Reconstruct it for later use during GC. */
776 case R_FR30_GNU_VTINHERIT:
777 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
778 return false;
779 break;
6609fa74 780
252b5132
RH		 781 /* This relocation describes which C++ vtable entries are actually
782 used. Record for later use during GC. */
783 case R_FR30_GNU_VTENTRY:
784 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
785 return false;
786 break;
787 }
788 }
6609fa74 789
252b5132
RH		 790 return true;
791}
792\f
793#define ELF_ARCH bfd_arch_fr30
aa4f99bb
AO		 794#define ELF_MACHINE_CODE EM_FR30
795#define ELF_MACHINE_ALT1 EM_CYGNUS_FR30
252b5132
RH		 796#define ELF_MAXPAGESIZE 0x1000
797
798#define TARGET_BIG_SYM bfd_elf32_fr30_vec
799#define TARGET_BIG_NAME "elf32-fr30"
800
801#define elf_info_to_howto_rel NULL
802#define elf_info_to_howto fr30_info_to_howto_rela
803#define elf_backend_relocate_section fr30_elf_relocate_section
804#define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook
805#define elf_backend_gc_sweep_hook fr30_elf_gc_sweep_hook
806#define elf_backend_check_relocs fr30_elf_check_relocs
807
808#define elf_backend_can_gc_sections 1
809
810#define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup
811
812#include "elf32-target.h"
GDB Binutils - Deliverables
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