1 /* FR30-specific support for 32-bit ELF.
2 Copyright (C) 1998-2016 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
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 3 of the License, or
9 (at your option) any later version.
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.
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., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
27 /* Forward declarations. */
28 static bfd_reloc_status_type
29 fr30_elf_i20_reloc (bfd *, arelent *, asymbol *, void * data,
30 asection *, bfd *, char **error_message);
31 static bfd_reloc_status_type
32 fr30_elf_i32_reloc (bfd *, arelent *, asymbol *, void *,
33 asection *, bfd *, char **);
35 static reloc_howto_type fr30_elf_howto_table [] =
37 /* This reloc does nothing. */
38 HOWTO (R_FR30_NONE, /* type */
40 3, /* size (0 = byte, 1 = short, 2 = long) */
42 FALSE, /* pc_relative */
44 complain_overflow_dont, /* complain_on_overflow */
45 bfd_elf_generic_reloc, /* special_function */
46 "R_FR30_NONE", /* name */
47 FALSE, /* partial_inplace */
50 FALSE), /* pcrel_offset */
52 /* An 8 bit absolute relocation. */
53 HOWTO (R_FR30_8, /* type */
55 1, /* size (0 = byte, 1 = short, 2 = long) */
57 FALSE, /* pc_relative */
59 complain_overflow_bitfield, /* complain_on_overflow */
60 bfd_elf_generic_reloc, /* special_function */
61 "R_FR30_8", /* name */
62 FALSE, /* partial_inplace */
63 0x0000, /* src_mask */
64 0x0ff0, /* dst_mask */
65 FALSE), /* pcrel_offset */
67 /* A 20 bit absolute relocation. */
68 HOWTO (R_FR30_20, /* type */
70 2, /* size (0 = byte, 1 = short, 2 = long) */
72 FALSE, /* pc_relative */
74 complain_overflow_bitfield, /* complain_on_overflow */
75 fr30_elf_i20_reloc, /* special_function */
76 "R_FR30_20", /* name */
77 FALSE, /* partial_inplace */
78 0x00000000, /* src_mask */
79 0x00f0ffff, /* dst_mask */
80 FALSE), /* pcrel_offset */
82 /* A 32 bit absolute relocation. */
83 HOWTO (R_FR30_32, /* type */
85 2, /* size (0 = byte, 1 = short, 2 = long) */
87 FALSE, /* pc_relative */
89 complain_overflow_bitfield, /* complain_on_overflow */
90 bfd_elf_generic_reloc, /* special_function */
91 "R_FR30_32", /* name */
92 FALSE, /* partial_inplace */
93 0x00000000, /* src_mask */
94 0xffffffff, /* dst_mask */
95 FALSE), /* pcrel_offset */
97 /* A 32 bit into 48 bits absolute relocation. */
98 HOWTO (R_FR30_48, /* type */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
102 FALSE, /* pc_relative */
104 complain_overflow_bitfield, /* complain_on_overflow */
105 fr30_elf_i32_reloc, /* special_function */
106 "R_FR30_48", /* name */
107 FALSE, /* partial_inplace */
108 0x00000000, /* src_mask */
109 0xffffffff, /* dst_mask */
110 FALSE), /* pcrel_offset */
112 /* A 6 bit absolute relocation. */
113 HOWTO (R_FR30_6_IN_4, /* type */
115 1, /* size (0 = byte, 1 = short, 2 = long) */
117 FALSE, /* pc_relative */
119 complain_overflow_unsigned, /* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_FR30_6_IN_4", /* name */
122 FALSE, /* partial_inplace */
123 0x0000, /* src_mask */
124 0x00f0, /* dst_mask */
125 FALSE), /* pcrel_offset */
127 /* An 8 bit absolute relocation. */
128 HOWTO (R_FR30_8_IN_8, /* type */
130 1, /* size (0 = byte, 1 = short, 2 = long) */
132 FALSE, /* pc_relative */
134 complain_overflow_signed, /* complain_on_overflow */
135 bfd_elf_generic_reloc,/* special_function */
136 "R_FR30_8_IN_8", /* name */
137 FALSE, /* partial_inplace */
138 0x0000, /* src_mask */
139 0x0ff0, /* dst_mask */
140 FALSE), /* pcrel_offset */
142 /* A 9 bit absolute relocation. */
143 HOWTO (R_FR30_9_IN_8, /* type */
145 1, /* size (0 = byte, 1 = short, 2 = long) */
147 FALSE, /* pc_relative */
149 complain_overflow_signed, /* complain_on_overflow */
150 bfd_elf_generic_reloc,/* special_function */
151 "R_FR30_9_IN_8", /* name */
152 FALSE, /* partial_inplace */
153 0x0000, /* src_mask */
154 0x0ff0, /* dst_mask */
155 FALSE), /* pcrel_offset */
157 /* A 10 bit absolute relocation. */
158 HOWTO (R_FR30_10_IN_8, /* type */
160 1, /* size (0 = byte, 1 = short, 2 = long) */
162 FALSE, /* pc_relative */
164 complain_overflow_signed, /* complain_on_overflow */
165 bfd_elf_generic_reloc,/* special_function */
166 "R_FR30_10_IN_8", /* name */
167 FALSE, /* partial_inplace */
168 0x0000, /* src_mask */
169 0x0ff0, /* dst_mask */
170 FALSE), /* pcrel_offset */
172 /* A PC relative 9 bit relocation, right shifted by 1. */
173 HOWTO (R_FR30_9_PCREL, /* type */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
177 TRUE, /* pc_relative */
179 complain_overflow_signed, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_FR30_9_PCREL", /* name */
182 FALSE, /* partial_inplace */
183 0x0000, /* src_mask */
184 0x00ff, /* dst_mask */
185 FALSE), /* pcrel_offset */
187 /* A PC relative 12 bit relocation, right shifted by 1. */
188 HOWTO (R_FR30_12_PCREL, /* type */
190 1, /* size (0 = byte, 1 = short, 2 = long) */
192 TRUE, /* pc_relative */
194 complain_overflow_signed, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_FR30_12_PCREL", /* name */
197 FALSE, /* partial_inplace */
198 0x0000, /* src_mask */
199 0x07ff, /* dst_mask */
200 FALSE), /* pcrel_offset */
201 /* GNU extension to record C++ vtable hierarchy */
202 HOWTO (R_FR30_GNU_VTINHERIT, /* type */
204 2, /* size (0 = byte, 1 = short, 2 = long) */
206 FALSE, /* pc_relative */
208 complain_overflow_dont, /* complain_on_overflow */
209 NULL, /* special_function */
210 "R_FR30_GNU_VTINHERIT", /* name */
211 FALSE, /* partial_inplace */
214 FALSE), /* pcrel_offset */
216 /* GNU extension to record C++ vtable member usage */
217 HOWTO (R_FR30_GNU_VTENTRY, /* type */
219 2, /* size (0 = byte, 1 = short, 2 = long) */
221 FALSE, /* pc_relative */
223 complain_overflow_dont, /* complain_on_overflow */
224 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
225 "R_FR30_GNU_VTENTRY", /* name */
226 FALSE, /* partial_inplace */
229 FALSE), /* pcrel_offset */
232 /* Utility to actually perform an R_FR30_20 reloc. */
234 static bfd_reloc_status_type
235 fr30_elf_i20_reloc (bfd *abfd,
236 arelent *reloc_entry,
239 asection *input_section,
241 char **error_message ATTRIBUTE_UNUSED)
246 /* This part is from bfd_elf_generic_reloc. */
247 if (output_bfd != (bfd *) NULL
248 && (symbol->flags & BSF_SECTION_SYM) == 0
249 && (! reloc_entry->howto->partial_inplace
250 || reloc_entry->addend == 0))
252 reloc_entry->address += input_section->output_offset;
256 if (output_bfd != NULL)
257 /* FIXME: See bfd_perform_relocation. Is this right? */
262 + symbol->section->output_section->vma
263 + symbol->section->output_offset
264 + reloc_entry->addend;
266 if (relocation > (((bfd_vma) 1 << 20) - 1))
267 return bfd_reloc_overflow;
269 x = bfd_get_32 (abfd, (char *) data + reloc_entry->address);
270 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
271 bfd_put_32 (abfd, (bfd_vma) x, (char *) data + reloc_entry->address);
276 /* Utility to actually perform a R_FR30_48 reloc. */
278 static bfd_reloc_status_type
279 fr30_elf_i32_reloc (bfd *abfd,
280 arelent *reloc_entry,
283 asection *input_section,
285 char **error_message ATTRIBUTE_UNUSED)
289 /* This part is from bfd_elf_generic_reloc. */
290 if (output_bfd != (bfd *) NULL
291 && (symbol->flags & BSF_SECTION_SYM) == 0
292 && (! reloc_entry->howto->partial_inplace
293 || reloc_entry->addend == 0))
295 reloc_entry->address += input_section->output_offset;
299 if (output_bfd != NULL)
300 /* FIXME: See bfd_perform_relocation. Is this right? */
305 + symbol->section->output_section->vma
306 + symbol->section->output_offset
307 + reloc_entry->addend;
309 bfd_put_32 (abfd, relocation, (char *) data + reloc_entry->address + 2);
314 /* Map BFD reloc types to FR30 ELF reloc types. */
316 struct fr30_reloc_map
318 bfd_reloc_code_real_type bfd_reloc_val;
319 unsigned int fr30_reloc_val;
322 static const struct fr30_reloc_map fr30_reloc_map [] =
324 { BFD_RELOC_NONE, R_FR30_NONE },
325 { BFD_RELOC_8, R_FR30_8 },
326 { BFD_RELOC_FR30_20, R_FR30_20 },
327 { BFD_RELOC_32, R_FR30_32 },
328 { BFD_RELOC_FR30_48, R_FR30_48 },
329 { BFD_RELOC_FR30_6_IN_4, R_FR30_6_IN_4 },
330 { BFD_RELOC_FR30_8_IN_8, R_FR30_8_IN_8 },
331 { BFD_RELOC_FR30_9_IN_8, R_FR30_9_IN_8 },
332 { BFD_RELOC_FR30_10_IN_8, R_FR30_10_IN_8 },
333 { BFD_RELOC_FR30_9_PCREL, R_FR30_9_PCREL },
334 { BFD_RELOC_FR30_12_PCREL, R_FR30_12_PCREL },
335 { BFD_RELOC_VTABLE_INHERIT, R_FR30_GNU_VTINHERIT },
336 { BFD_RELOC_VTABLE_ENTRY, R_FR30_GNU_VTENTRY },
339 static reloc_howto_type *
340 fr30_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
341 bfd_reloc_code_real_type code)
345 for (i = sizeof (fr30_reloc_map) / sizeof (fr30_reloc_map[0]);
347 if (fr30_reloc_map [i].bfd_reloc_val == code)
348 return & fr30_elf_howto_table [fr30_reloc_map[i].fr30_reloc_val];
353 static reloc_howto_type *
354 fr30_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
359 i < sizeof (fr30_elf_howto_table) / sizeof (fr30_elf_howto_table[0]);
361 if (fr30_elf_howto_table[i].name != NULL
362 && strcasecmp (fr30_elf_howto_table[i].name, r_name) == 0)
363 return &fr30_elf_howto_table[i];
368 /* Set the howto pointer for an FR30 ELF reloc. */
371 fr30_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
373 Elf_Internal_Rela *dst)
377 r_type = ELF32_R_TYPE (dst->r_info);
378 if (r_type >= (unsigned int) R_FR30_max)
380 /* xgettext:c-format */
381 _bfd_error_handler (_("%B: invalid FR30 reloc number: %d"), abfd, r_type);
384 cache_ptr->howto = & fr30_elf_howto_table [r_type];
387 /* Perform a single relocation. By default we use the standard BFD
388 routines, but a few relocs, we have to do them ourselves. */
390 static bfd_reloc_status_type
391 fr30_final_link_relocate (reloc_howto_type *howto,
393 asection *input_section,
395 Elf_Internal_Rela *rel,
398 bfd_reloc_status_type r = bfd_reloc_ok;
405 contents += rel->r_offset;
406 relocation += rel->r_addend;
408 if (relocation > ((1 << 20) - 1))
409 return bfd_reloc_overflow;
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);
417 contents += rel->r_offset + 2;
418 relocation += rel->r_addend;
419 bfd_put_32 (input_bfd, relocation, contents);
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);
432 return bfd_reloc_outofrange;
433 if (srel > ((1 << 8) - 1) || (srel < - (1 << 8)))
434 return bfd_reloc_overflow;
436 bfd_put_8 (input_bfd, srel >> 1, contents);
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);
449 return bfd_reloc_outofrange;
450 if (srel > ((1 << 11) - 1) || (srel < - (1 << 11)))
451 return bfd_reloc_overflow;
453 x = bfd_get_16 (input_bfd, contents);
454 x = (x & 0xf800) | ((srel >> 1) & 0x7ff);
455 bfd_put_16 (input_bfd, x, contents);
459 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
460 contents, rel->r_offset,
461 relocation, rel->r_addend);
467 /* Relocate an FR30 ELF section.
469 The RELOCATE_SECTION function is called by the new ELF backend linker
470 to handle the relocations for a section.
472 The relocs are always passed as Rela structures; if the section
473 actually uses Rel structures, the r_addend field will always be
476 This function is responsible for adjusting the section contents as
477 necessary, and (if using Rela relocs and generating a relocatable
478 output file) adjusting the reloc addend as necessary.
480 This function does not have to worry about setting the reloc
481 address or the reloc symbol index.
483 LOCAL_SYMS is a pointer to the swapped in local symbols.
485 LOCAL_SECTIONS is an array giving the section in the input file
486 corresponding to the st_shndx field of each local symbol.
488 The global hash table entry for the global symbols can be found
489 via elf_sym_hashes (input_bfd).
491 When generating relocatable output, this function must handle
492 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
493 going to be the section symbol corresponding to the output
494 section, which means that the addend must be adjusted
498 fr30_elf_relocate_section (bfd *output_bfd,
499 struct bfd_link_info *info,
501 asection *input_section,
503 Elf_Internal_Rela *relocs,
504 Elf_Internal_Sym *local_syms,
505 asection **local_sections)
507 Elf_Internal_Shdr *symtab_hdr;
508 struct elf_link_hash_entry **sym_hashes;
509 Elf_Internal_Rela *rel;
510 Elf_Internal_Rela *relend;
512 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
513 sym_hashes = elf_sym_hashes (input_bfd);
514 relend = relocs + input_section->reloc_count;
516 for (rel = relocs; rel < relend; rel ++)
518 reloc_howto_type *howto;
519 unsigned long r_symndx;
520 Elf_Internal_Sym *sym;
522 struct elf_link_hash_entry *h;
524 bfd_reloc_status_type r;
528 r_type = ELF32_R_TYPE (rel->r_info);
530 if ( r_type == R_FR30_GNU_VTINHERIT
531 || r_type == R_FR30_GNU_VTENTRY)
534 r_symndx = ELF32_R_SYM (rel->r_info);
536 howto = fr30_elf_howto_table + ELF32_R_TYPE (rel->r_info);
541 if (r_symndx < symtab_hdr->sh_info)
543 sym = local_syms + r_symndx;
544 sec = local_sections [r_symndx];
545 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
547 name = bfd_elf_string_from_elf_section
548 (input_bfd, symtab_hdr->sh_link, sym->st_name);
549 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
553 bfd_boolean unresolved_reloc, warned, ignored;
555 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
556 r_symndx, symtab_hdr, sym_hashes,
558 unresolved_reloc, warned, ignored);
560 name = h->root.root.string;
563 if (sec != NULL && discarded_section (sec))
564 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
565 rel, 1, relend, howto, 0, contents);
567 if (bfd_link_relocatable (info))
570 r = fr30_final_link_relocate (howto, input_bfd, input_section,
571 contents, rel, relocation);
573 if (r != bfd_reloc_ok)
575 const char * msg = (const char *) NULL;
579 case bfd_reloc_overflow:
580 (*info->callbacks->reloc_overflow)
581 (info, (h ? &h->root : NULL), name, howto->name,
582 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
585 case bfd_reloc_undefined:
586 (*info->callbacks->undefined_symbol)
587 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
590 case bfd_reloc_outofrange:
591 msg = _("internal error: out of range error");
594 case bfd_reloc_notsupported:
595 msg = _("internal error: unsupported relocation error");
598 case bfd_reloc_dangerous:
599 msg = _("internal error: dangerous relocation");
603 msg = _("internal error: unknown error");
608 (*info->callbacks->warning) (info, msg, name, input_bfd,
609 input_section, rel->r_offset);
616 /* Return the section that should be marked against GC for a given
620 fr30_elf_gc_mark_hook (asection *sec,
621 struct bfd_link_info *info,
622 Elf_Internal_Rela *rel,
623 struct elf_link_hash_entry *h,
624 Elf_Internal_Sym *sym)
627 switch (ELF32_R_TYPE (rel->r_info))
629 case R_FR30_GNU_VTINHERIT:
630 case R_FR30_GNU_VTENTRY:
634 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
637 /* Look through the relocs for a section during the first phase.
638 Since we don't do .gots or .plts, we just need to consider the
639 virtual table relocs for gc. */
642 fr30_elf_check_relocs (bfd *abfd,
643 struct bfd_link_info *info,
645 const Elf_Internal_Rela *relocs)
647 Elf_Internal_Shdr *symtab_hdr;
648 struct elf_link_hash_entry **sym_hashes;
649 const Elf_Internal_Rela *rel;
650 const Elf_Internal_Rela *rel_end;
652 if (bfd_link_relocatable (info))
655 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
656 sym_hashes = elf_sym_hashes (abfd);
658 rel_end = relocs + sec->reloc_count;
659 for (rel = relocs; rel < rel_end; rel++)
661 struct elf_link_hash_entry *h;
662 unsigned long r_symndx;
664 r_symndx = ELF32_R_SYM (rel->r_info);
665 if (r_symndx < symtab_hdr->sh_info)
669 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
670 while (h->root.type == bfd_link_hash_indirect
671 || h->root.type == bfd_link_hash_warning)
672 h = (struct elf_link_hash_entry *) h->root.u.i.link;
674 /* PR15323, ref flags aren't set for references in the same
676 h->root.non_ir_ref = 1;
679 switch (ELF32_R_TYPE (rel->r_info))
681 /* This relocation describes the C++ object vtable hierarchy.
682 Reconstruct it for later use during GC. */
683 case R_FR30_GNU_VTINHERIT:
684 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
688 /* This relocation describes which C++ vtable entries are actually
689 used. Record for later use during GC. */
690 case R_FR30_GNU_VTENTRY:
691 BFD_ASSERT (h != NULL);
693 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
702 #define ELF_ARCH bfd_arch_fr30
703 #define ELF_MACHINE_CODE EM_FR30
704 #define ELF_MACHINE_ALT1 EM_CYGNUS_FR30
705 #define ELF_MAXPAGESIZE 0x1000
707 #define TARGET_BIG_SYM fr30_elf32_vec
708 #define TARGET_BIG_NAME "elf32-fr30"
710 #define elf_info_to_howto_rel NULL
711 #define elf_info_to_howto fr30_info_to_howto_rela
712 #define elf_backend_relocate_section fr30_elf_relocate_section
713 #define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook
714 #define elf_backend_check_relocs fr30_elf_check_relocs
716 #define elf_backend_can_gc_sections 1
717 #define elf_backend_rela_normal 1
719 #define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup
720 #define bfd_elf32_bfd_reloc_name_lookup fr30_reloc_name_lookup
722 #include "elf32-target.h"