1 /* D10V-specific support for 32-bit ELF
2 Copyright (C) 1996, 1998, 1999, 2000 Free Software Foundation, Inc.
3 Contributed by Martin Hunt (hunt@cygnus.com).
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
28 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
29 static void d10v_info_to_howto_rel
30 PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
32 /* Use REL instead of RELA to save space */
35 static reloc_howto_type elf_d10v_howto_table[] =
37 /* This reloc does nothing. */
38 HOWTO (R_D10V_NONE, /* type */
40 2, /* size (0 = byte, 1 = short, 2 = long) */
42 false, /* pc_relative */
44 complain_overflow_bitfield, /* complain_on_overflow */
45 bfd_elf_generic_reloc, /* special_function */
46 "R_D10V_NONE", /* name */
47 false, /* partial_inplace */
50 false), /* pcrel_offset */
52 /* An PC Relative 10-bit relocation, shifted by 2 */
54 HOWTO (R_D10V_10_PCREL_R, /* type */
56 2, /* size (0 = byte, 1 = short, 2 = long) */
58 true, /* pc_relative */
60 complain_overflow_bitfield, /* complain_on_overflow */
61 bfd_elf_generic_reloc, /* special_function */
62 "R_D10V_10_PCREL_R", /* name */
63 false, /* partial_inplace */
66 true), /* pcrel_offset */
68 /* An PC Relative 10-bit relocation, shifted by 2 */
70 HOWTO (R_D10V_10_PCREL_L, /* type */
72 2, /* size (0 = byte, 1 = short, 2 = long) */
74 true, /* pc_relative */
76 complain_overflow_bitfield, /* complain_on_overflow */
77 bfd_elf_generic_reloc, /* special_function */
78 "R_D10V_10_PCREL_L", /* name */
79 false, /* partial_inplace */
80 0x07f8000, /* src_mask */
81 0x07f8000, /* dst_mask */
82 true), /* pcrel_offset */
84 /* A 16 bit absolute relocation */
85 HOWTO (R_D10V_16, /* type */
87 1, /* size (0 = byte, 1 = short, 2 = long) */
89 false, /* pc_relative */
91 complain_overflow_dont, /* complain_on_overflow */
92 bfd_elf_generic_reloc, /* special_function */
93 "R_D10V_16", /* name */
94 false, /* partial_inplace */
95 0xffff, /* src_mask */
96 0xffff, /* dst_mask */
97 false), /* pcrel_offset */
99 /* An 18 bit absolute relocation, right shifted 2 */
100 HOWTO (R_D10V_18, /* type */
102 1, /* size (0 = byte, 1 = short, 2 = long) */
104 false, /* pc_relative */
106 complain_overflow_dont, /* complain_on_overflow */
107 bfd_elf_generic_reloc, /* special_function */
108 "R_D10V_18", /* name */
109 false, /* partial_inplace */
110 0xffff, /* src_mask */
111 0xffff, /* dst_mask */
112 false), /* pcrel_offset */
114 /* A relative 18 bit relocation, right shifted by 2 */
115 HOWTO (R_D10V_18_PCREL, /* type */
117 2, /* size (0 = byte, 1 = short, 2 = long) */
119 true, /* pc_relative */
121 complain_overflow_signed, /* complain_on_overflow */
122 bfd_elf_generic_reloc, /* special_function */
123 "R_D10V_18_PCREL", /* name */
124 false, /* partial_inplace */
125 0xffff, /* src_mask */
126 0xffff, /* dst_mask */
127 true), /* pcrel_offset */
129 /* A 32 bit absolute relocation */
130 HOWTO (R_D10V_32, /* type */
132 2, /* size (0 = byte, 1 = short, 2 = long) */
134 false, /* pc_relative */
136 complain_overflow_bitfield, /* complain_on_overflow */
137 bfd_elf_generic_reloc, /* special_function */
138 "R_D10V_32", /* name */
139 false, /* partial_inplace */
140 0xffffffff, /* src_mask */
141 0xffffffff, /* dst_mask */
142 false), /* pcrel_offset */
144 /* GNU extension to record C++ vtable hierarchy */
145 HOWTO (R_D10V_GNU_VTINHERIT, /* type */
147 2, /* size (0 = byte, 1 = short, 2 = long) */
149 false, /* pc_relative */
151 complain_overflow_dont, /* complain_on_overflow */
152 NULL, /* special_function */
153 "R_D10V_GNU_VTINHERIT", /* name */
154 false, /* partial_inplace */
157 false), /* pcrel_offset */
159 /* GNU extension to record C++ vtable member usage */
160 HOWTO (R_D10V_GNU_VTENTRY, /* type */
162 2, /* size (0 = byte, 1 = short, 2 = long) */
164 false, /* pc_relative */
166 complain_overflow_dont, /* complain_on_overflow */
167 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
168 "R_D10V_GNU_VTENTRY", /* name */
169 false, /* partial_inplace */
172 false), /* pcrel_offset */
176 /* Map BFD reloc types to D10V ELF reloc types. */
178 struct d10v_reloc_map
180 bfd_reloc_code_real_type bfd_reloc_val;
181 unsigned char elf_reloc_val;
184 static const struct d10v_reloc_map d10v_reloc_map[] =
186 { BFD_RELOC_NONE, R_D10V_NONE, },
187 { BFD_RELOC_D10V_10_PCREL_R, R_D10V_10_PCREL_R },
188 { BFD_RELOC_D10V_10_PCREL_L, R_D10V_10_PCREL_L },
189 { BFD_RELOC_16, R_D10V_16 },
190 { BFD_RELOC_D10V_18, R_D10V_18 },
191 { BFD_RELOC_D10V_18_PCREL, R_D10V_18_PCREL },
192 { BFD_RELOC_32, R_D10V_32 },
193 { BFD_RELOC_VTABLE_INHERIT, R_D10V_GNU_VTINHERIT },
194 { BFD_RELOC_VTABLE_ENTRY, R_D10V_GNU_VTENTRY },
197 static reloc_howto_type *
198 bfd_elf32_bfd_reloc_type_lookup (abfd, code)
199 bfd *abfd ATTRIBUTE_UNUSED;
200 bfd_reloc_code_real_type code;
205 i < sizeof (d10v_reloc_map) / sizeof (struct d10v_reloc_map);
208 if (d10v_reloc_map[i].bfd_reloc_val == code)
209 return &elf_d10v_howto_table[d10v_reloc_map[i].elf_reloc_val];
215 /* Set the howto pointer for an D10V ELF reloc. */
218 d10v_info_to_howto_rel (abfd, cache_ptr, dst)
219 bfd *abfd ATTRIBUTE_UNUSED;
221 Elf32_Internal_Rel *dst;
225 r_type = ELF32_R_TYPE (dst->r_info);
226 BFD_ASSERT (r_type < (unsigned int) R_D10V_max);
227 cache_ptr->howto = &elf_d10v_howto_table[r_type];
231 elf32_d10v_gc_mark_hook (abfd, info, rel, h, sym)
233 struct bfd_link_info *info ATTRIBUTE_UNUSED;
234 Elf_Internal_Rela *rel;
235 struct elf_link_hash_entry *h;
236 Elf_Internal_Sym *sym;
240 switch (ELF32_R_TYPE (rel->r_info))
242 case R_D10V_GNU_VTINHERIT:
243 case R_D10V_GNU_VTENTRY:
247 switch (h->root.type)
249 case bfd_link_hash_defined:
250 case bfd_link_hash_defweak:
251 return h->root.u.def.section;
253 case bfd_link_hash_common:
254 return h->root.u.c.p->section;
263 if (!(elf_bad_symtab (abfd)
264 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
265 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
266 && sym->st_shndx != SHN_COMMON))
268 return bfd_section_from_elf_index (abfd, sym->st_shndx);
275 elf32_d10v_gc_sweep_hook (abfd, info, sec, relocs)
276 bfd *abfd ATTRIBUTE_UNUSED;
277 struct bfd_link_info *info ATTRIBUTE_UNUSED;
278 asection *sec ATTRIBUTE_UNUSED;
279 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
281 /* we don't use got and plt entries for d10v */
285 /* Look through the relocs for a section during the first phase.
286 Since we don't do .gots or .plts, we just need to consider the
287 virtual table relocs for gc. */
290 elf32_d10v_check_relocs (abfd, info, sec, relocs)
292 struct bfd_link_info *info;
294 const Elf_Internal_Rela *relocs;
296 Elf_Internal_Shdr *symtab_hdr;
297 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
298 const Elf_Internal_Rela *rel;
299 const Elf_Internal_Rela *rel_end;
301 if (info->relocateable)
304 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
305 sym_hashes = elf_sym_hashes (abfd);
306 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
307 if (!elf_bad_symtab (abfd))
308 sym_hashes_end -= symtab_hdr->sh_info;
310 rel_end = relocs + sec->reloc_count;
311 for (rel = relocs; rel < rel_end; rel++)
313 struct elf_link_hash_entry *h;
314 unsigned long r_symndx;
316 r_symndx = ELF32_R_SYM (rel->r_info);
317 if (r_symndx < symtab_hdr->sh_info)
320 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
322 switch (ELF32_R_TYPE (rel->r_info))
324 /* This relocation describes the C++ object vtable hierarchy.
325 Reconstruct it for later use during GC. */
326 case R_D10V_GNU_VTINHERIT:
327 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
331 /* This relocation describes which C++ vtable entries are actually
332 used. Record for later use during GC. */
333 case R_D10V_GNU_VTENTRY:
334 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
343 /* Relocate a D10V ELF section. */
345 elf32_d10v_relocate_section (output_bfd, info, input_bfd, input_section,
346 contents, relocs, local_syms, local_sections)
347 bfd *output_bfd ATTRIBUTE_UNUSED;
348 struct bfd_link_info *info;
350 asection *input_section;
352 Elf_Internal_Rela *relocs;
353 Elf_Internal_Sym *local_syms;
354 asection **local_sections;
356 Elf_Internal_Shdr *symtab_hdr;
357 struct elf_link_hash_entry **sym_hashes;
358 Elf_Internal_Rela *rel, *relend;
361 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
362 sym_hashes = elf_sym_hashes (input_bfd);
365 relend = relocs + input_section->reloc_count;
366 for (; rel < relend; rel++)
369 reloc_howto_type *howto;
370 unsigned long r_symndx;
371 Elf_Internal_Sym *sym;
373 struct elf_link_hash_entry *h;
375 bfd_reloc_status_type r;
377 r_symndx = ELF32_R_SYM (rel->r_info);
378 r_type = ELF32_R_TYPE (rel->r_info);
380 if (r_type == R_D10V_GNU_VTENTRY
381 || r_type == R_D10V_GNU_VTINHERIT )
384 howto = elf_d10v_howto_table + r_type;
386 if (info->relocateable)
388 /* This is a relocateable link. We don't have to change
389 anything, unless the reloc is against a section symbol,
390 in which case we have to adjust according to where the
391 section symbol winds up in the output section. */
392 if (r_symndx < symtab_hdr->sh_info)
394 sym = local_syms + r_symndx;
395 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
397 sec = local_sections[r_symndx];
398 rel->r_addend += sec->output_offset + sym->st_value;
405 /* This is a final link. */
409 if (r_symndx < symtab_hdr->sh_info)
411 sym = local_syms + r_symndx;
412 sec = local_sections[r_symndx];
413 relocation = (sec->output_section->vma
419 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
420 while (h->root.type == bfd_link_hash_indirect
421 || h->root.type == bfd_link_hash_warning)
422 h = (struct elf_link_hash_entry *) h->root.u.i.link;
423 if (h->root.type == bfd_link_hash_defined
424 || h->root.type == bfd_link_hash_defweak)
426 sec = h->root.u.def.section;
427 relocation = (h->root.u.def.value
428 + sec->output_section->vma
429 + sec->output_offset);
431 else if (h->root.type == bfd_link_hash_undefweak)
435 if (!((*info->callbacks->undefined_symbol)
436 (info, h->root.root.string, input_bfd,
437 input_section, rel->r_offset, true)))
444 name = h->root.root.string;
447 name = (bfd_elf_string_from_elf_section
448 (input_bfd, symtab_hdr->sh_link, sym->st_name));
449 if (name == NULL || *name == '\0')
450 name = bfd_section_name (input_bfd, sec);
453 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
454 contents, rel->r_offset,
455 relocation, rel->r_addend);
457 if (r != bfd_reloc_ok)
459 const char * msg = (const char *) 0;
463 case bfd_reloc_overflow:
464 if (!((*info->callbacks->reloc_overflow)
465 (info, name, howto->name, (bfd_vma) 0,
466 input_bfd, input_section, rel->r_offset)))
470 case bfd_reloc_undefined:
471 if (!((*info->callbacks->undefined_symbol)
472 (info, name, input_bfd, input_section,
473 rel->r_offset, true)))
477 case bfd_reloc_outofrange:
478 msg = _ ("internal error: out of range error");
481 case bfd_reloc_notsupported:
482 msg = _ ("internal error: unsupported relocation error");
485 case bfd_reloc_dangerous:
486 msg = _ ("internal error: dangerous error");
490 msg = _ ("internal error: unknown error");
494 if (!((*info->callbacks->warning)
495 (info, msg, name, input_bfd, input_section,
505 #define ELF_ARCH bfd_arch_d10v
506 #define ELF_MACHINE_CODE EM_CYGNUS_D10V
507 #define ELF_MAXPAGESIZE 0x1000
509 #define TARGET_BIG_SYM bfd_elf32_d10v_vec
510 #define TARGET_BIG_NAME "elf32-d10v"
512 #define elf_info_to_howto 0
513 #define elf_info_to_howto_rel d10v_info_to_howto_rel
514 #define elf_backend_object_p 0
515 #define elf_backend_final_write_processing 0
516 #define elf_backend_gc_mark_hook elf32_d10v_gc_mark_hook
517 #define elf_backend_gc_sweep_hook elf32_d10v_gc_sweep_hook
518 #define elf_backend_check_relocs elf32_d10v_check_relocs
519 #define elf_backend_relocate_section elf32_d10v_relocate_section
520 #define elf_backend_can_gc_sections 1
522 #include "elf32-target.h"