1 /* FR30-specific support for 32-bit ELF.
2 Copyright (C) 1998 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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 *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
37 static bfd_reloc_status_type fr30_final_link_relocate
38 PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma));
40 static reloc_howto_type fr30_elf_howto_table [] =
42 /* This reloc does nothing. */
43 HOWTO (R_FR30_NONE, /* type */
45 2, /* size (0 = byte, 1 = short, 2 = long) */
47 false, /* pc_relative */
49 complain_overflow_bitfield, /* complain_on_overflow */
50 bfd_elf_generic_reloc, /* special_function */
51 "R_FR30_NONE", /* name */
52 false, /* partial_inplace */
55 false), /* pcrel_offset */
57 /* An 8 bit absolute relocation. */
58 HOWTO (R_FR30_8, /* type */
60 1, /* size (0 = byte, 1 = short, 2 = long) */
62 false, /* pc_relative */
64 complain_overflow_bitfield, /* complain_on_overflow */
65 bfd_elf_generic_reloc, /* special_function */
66 "R_FR30_8", /* name */
67 true, /* partial_inplace */
68 0x0ff0, /* src_mask */
69 0x0ff0, /* dst_mask */
70 false), /* pcrel_offset */
72 /* A 20 bit absolute relocation. */
73 HOWTO (R_FR30_20, /* type */
75 2, /* size (0 = byte, 1 = short, 2 = long) */
77 false, /* pc_relative */
79 complain_overflow_bitfield, /* complain_on_overflow */
80 fr30_elf_i20_reloc, /* special_function */
81 "R_FR30_20", /* name */
82 true, /* partial_inplace */
83 0x00f0ffff, /* src_mask */
84 0x00f0ffff, /* dst_mask */
85 false), /* pcrel_offset */
87 /* A 32 bit absolute relocation. */
88 HOWTO (R_FR30_32, /* type */
90 2, /* size (0 = byte, 1 = short, 2 = long) */
92 false, /* pc_relative */
94 complain_overflow_bitfield, /* complain_on_overflow */
95 bfd_elf_generic_reloc, /* special_function */
96 "R_FR30_32", /* name */
97 true, /* partial_inplace */
98 0xffffffff, /* src_mask */
99 0xffffffff, /* dst_mask */
100 false), /* pcrel_offset */
102 /* A 32 bit into 48 bits absolute relocation. */
103 HOWTO (R_FR30_48, /* type */
105 2, /* size (0 = byte, 1 = short, 2 = long) */
107 false, /* pc_relative */
109 complain_overflow_bitfield, /* complain_on_overflow */
110 fr30_elf_i32_reloc, /* special_function */
111 "R_FR30_32", /* name */
112 true, /* partial_inplace */
113 0xffffffff, /* src_mask */
114 0xffffffff, /* dst_mask */
115 false), /* pcrel_offset */
117 /* A 6 bit absolute relocation. */
118 HOWTO (R_FR30_6_IN_4, /* type */
120 1, /* size (0 = byte, 1 = short, 2 = long) */
122 false, /* pc_relative */
124 complain_overflow_unsigned, /* complain_on_overflow */
125 bfd_elf_generic_reloc, /* special_function */
126 "R_FR30_6_IN_4", /* name */
127 true, /* partial_inplace */
128 0x00f0, /* src_mask */
129 0x00f0, /* dst_mask */
130 false), /* pcrel_offset */
132 /* An 8 bit absolute relocation. */
133 HOWTO (R_FR30_8_IN_8, /* type */
135 1, /* size (0 = byte, 1 = short, 2 = long) */
137 false, /* pc_relative */
139 complain_overflow_signed, /* complain_on_overflow */
140 bfd_elf_generic_reloc,/* special_function */
141 "R_FR30_8_IN_8", /* name */
142 true, /* partial_inplace */
143 0x0ff0, /* src_mask */
144 0x0ff0, /* dst_mask */
145 false), /* pcrel_offset */
147 /* A 9 bit absolute relocation. */
148 HOWTO (R_FR30_9_IN_8, /* type */
150 1, /* size (0 = byte, 1 = short, 2 = long) */
152 false, /* pc_relative */
154 complain_overflow_signed, /* complain_on_overflow */
155 bfd_elf_generic_reloc,/* special_function */
156 "R_FR30_9_IN_8", /* name */
157 true, /* partial_inplace */
158 0x0ff0, /* src_mask */
159 0x0ff0, /* dst_mask */
160 false), /* pcrel_offset */
162 /* A 10 bit absolute relocation. */
163 HOWTO (R_FR30_10_IN_8, /* type */
165 1, /* size (0 = byte, 1 = short, 2 = long) */
167 false, /* pc_relative */
169 complain_overflow_signed, /* complain_on_overflow */
170 bfd_elf_generic_reloc,/* special_function */
171 "R_FR30_10_IN_8", /* name */
172 true, /* partial_inplace */
173 0x0ff0, /* src_mask */
174 0x0ff0, /* dst_mask */
175 false), /* pcrel_offset */
177 /* A PC relative 9 bit relocation, right shifted by 1. */
178 HOWTO (R_FR30_9_PCREL, /* type */
180 1, /* size (0 = byte, 1 = short, 2 = long) */
182 true, /* pc_relative */
184 complain_overflow_signed, /* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_FR30_9_PCREL", /* name */
187 false, /* partial_inplace */
188 0x00ff, /* src_mask */
189 0x00ff, /* dst_mask */
190 false), /* pcrel_offset */
192 /* A PC relative 12 bit relocation, right shifted by 1. */
193 HOWTO (R_FR30_12_PCREL, /* type */
195 1, /* size (0 = byte, 1 = short, 2 = long) */
197 true, /* pc_relative */
199 complain_overflow_signed, /* complain_on_overflow */
200 bfd_elf_generic_reloc, /* special_function */
201 "R_FR30_12_PCREL", /* name */
202 false, /* partial_inplace */
203 0x07ff, /* src_mask */
204 0x07ff, /* dst_mask */
205 false), /* pcrel_offset */
208 /* Utility to actually perform an R_FR30_20 reloc. */
210 static bfd_reloc_status_type
211 fr30_elf_i20_reloc (abfd, reloc_entry, symbol, data,
212 input_section, output_bfd, error_message)
214 arelent * reloc_entry;
217 asection * input_section;
219 char ** error_message;
224 /* This part is from bfd_elf_generic_reloc. */
225 if (output_bfd != (bfd *) NULL
226 && (symbol->flags & BSF_SECTION_SYM) == 0
227 && (! reloc_entry->howto->partial_inplace
228 || reloc_entry->addend == 0))
230 reloc_entry->address += input_section->output_offset;
234 if (output_bfd != NULL)
235 /* FIXME: See bfd_perform_relocation. Is this right? */
240 + symbol->section->output_section->vma
241 + symbol->section->output_offset
242 + reloc_entry->addend;
244 if (relocation > ((1U << 20) - 1))
245 return bfd_reloc_overflow;
247 x = bfd_get_32 (abfd, data + reloc_entry->address);
248 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
249 bfd_put_32 (abfd, x, data + reloc_entry->address);
255 /* Utility to actually perform a R_FR30_32 reloc. */
257 static bfd_reloc_status_type
258 fr30_elf_i32_reloc (abfd, reloc_entry, symbol, data,
259 input_section, output_bfd, error_message)
261 arelent * reloc_entry;
264 asection * input_section;
266 char ** error_message;
270 /* This part is from bfd_elf_generic_reloc. */
271 if (output_bfd != (bfd *) NULL
272 && (symbol->flags & BSF_SECTION_SYM) == 0
273 && (! reloc_entry->howto->partial_inplace
274 || reloc_entry->addend == 0))
276 reloc_entry->address += input_section->output_offset;
280 if (output_bfd != NULL)
281 /* FIXME: See bfd_perform_relocation. Is this right? */
286 + symbol->section->output_section->vma
287 + symbol->section->output_offset
288 + reloc_entry->addend;
290 bfd_put_32 (abfd, relocation, data + reloc_entry->address + 2);
295 /* Map BFD reloc types to FR30 ELF reloc types. */
297 struct fr30_reloc_map
299 unsigned int bfd_reloc_val;
300 unsigned int fr30_reloc_val;
303 static const struct fr30_reloc_map fr30_reloc_map [] =
305 { BFD_RELOC_NONE, R_FR30_NONE },
306 { BFD_RELOC_8, R_FR30_8 },
307 { BFD_RELOC_FR30_20, R_FR30_20 },
308 { BFD_RELOC_32, R_FR30_32 },
309 { BFD_RELOC_FR30_48, R_FR30_48 },
310 { BFD_RELOC_FR30_6_IN_4, R_FR30_6_IN_4 },
311 { BFD_RELOC_FR30_8_IN_8, R_FR30_8_IN_8 },
312 { BFD_RELOC_FR30_9_IN_8, R_FR30_9_IN_8 },
313 { BFD_RELOC_FR30_10_IN_8, R_FR30_10_IN_8 },
314 { BFD_RELOC_FR30_9_PCREL, R_FR30_9_PCREL },
315 { BFD_RELOC_FR30_12_PCREL, R_FR30_12_PCREL },
318 static reloc_howto_type *
319 fr30_reloc_type_lookup (abfd, code)
321 bfd_reloc_code_real_type code;
325 for (i = sizeof (fr30_reloc_map) / sizeof (fr30_reloc_map[0]);
327 if (fr30_reloc_map [i].bfd_reloc_val == code)
328 return & fr30_elf_howto_table [fr30_reloc_map[i].fr30_reloc_val];
333 /* Set the howto pointer for an FR30 ELF reloc. */
336 fr30_info_to_howto_rela (abfd, cache_ptr, dst)
339 Elf32_Internal_Rela * dst;
343 r_type = ELF32_R_TYPE (dst->r_info);
344 BFD_ASSERT (r_type < (unsigned int) R_FR30_max);
345 cache_ptr->howto = & fr30_elf_howto_table [r_type];
348 /* Perform a single relocation. By default we use the standard BFD
349 routines, but a few relocs, we have to do them ourselves. */
351 static bfd_reloc_status_type
352 fr30_final_link_relocate (howto, input_bfd, input_section, contents, rel, relocation)
353 reloc_howto_type * howto;
355 asection * input_section;
357 Elf_Internal_Rela * rel;
360 bfd_reloc_status_type r = bfd_reloc_ok;
366 contents += rel->r_offset;
367 relocation += rel->r_addend;
369 if (relocation > ((1 << 20) - 1))
370 return bfd_reloc_overflow;
372 x = bfd_get_32 (input_bfd, contents);
373 x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
374 bfd_put_32 (input_bfd, relocation, contents);
378 contents += rel->r_offset + 2;
379 relocation += rel->r_addend;
380 bfd_put_32 (input_bfd, relocation, contents);
384 contents += rel->r_offset + 1;
385 relocation += rel->r_addend;
386 relocation -= (input_section->output_section->vma +
387 input_section->output_offset);
390 return bfd_reloc_outofrange;
391 if (relocation > ((1 << 8) - 1) || (relocation < - (1 << 8)))
392 return bfd_reloc_overflow;
394 bfd_put_8 (input_bfd, relocation >> 1, contents);
397 case R_FR30_12_PCREL:
398 contents += rel->r_offset;
399 relocation += rel->r_addend;
400 relocation -= (input_section->output_section->vma +
401 input_section->output_offset);
404 return bfd_reloc_outofrange;
405 if (relocation > ((1 << 11) - 1) || (relocation < - (1 << 11)))
406 return bfd_reloc_overflow;
408 x = bfd_get_16 (input_bfd, contents);
409 x = (x & 0xf800) | ((relocation >> 1) & 0x7ff);
410 bfd_put_16 (input_bfd, x, contents);
414 fprintf (stderr, " type: %d offset: %x, before: %x\n",
415 howto->type, rel->r_offset, bfd_get_32 (input_bfd, contents + rel->r_offset));
417 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
418 contents, rel->r_offset,
419 relocation, rel->r_addend);
426 /* Relocate an FR30 ELF section.
427 There is some attempt to make this function usable for many architectures,
428 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
429 if only to serve as a learning tool.
431 The RELOCATE_SECTION function is called by the new ELF backend linker
432 to handle the relocations for a section.
434 The relocs are always passed as Rela structures; if the section
435 actually uses Rel structures, the r_addend field will always be
438 This function is responsible for adjusting the section contents as
439 necessary, and (if using Rela relocs and generating a relocateable
440 output file) adjusting the reloc addend as necessary.
442 This function does not have to worry about setting the reloc
443 address or the reloc symbol index.
445 LOCAL_SYMS is a pointer to the swapped in local symbols.
447 LOCAL_SECTIONS is an array giving the section in the input file
448 corresponding to the st_shndx field of each local symbol.
450 The global hash table entry for the global symbols can be found
451 via elf_sym_hashes (input_bfd).
453 When generating relocateable output, this function must handle
454 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
455 going to be the section symbol corresponding to the output
456 section, which means that the addend must be adjusted
460 fr30_elf_relocate_section (output_bfd, info, input_bfd, input_section,
461 contents, relocs, local_syms, local_sections)
463 struct bfd_link_info * info;
465 asection * input_section;
467 Elf_Internal_Rela * relocs;
468 Elf_Internal_Sym * local_syms;
469 asection ** local_sections;
471 Elf_Internal_Shdr * symtab_hdr;
472 struct elf_link_hash_entry ** sym_hashes;
473 Elf_Internal_Rela * rel;
474 Elf_Internal_Rela * relend;
476 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
477 sym_hashes = elf_sym_hashes (input_bfd);
478 relend = relocs + input_section->reloc_count;
480 fprintf (stderr, "Relocate section: %s\n", bfd_section_name (input_bfd, input_section));
482 for (rel = relocs; rel < relend; rel ++)
484 reloc_howto_type * howto;
485 unsigned long r_symndx;
486 Elf_Internal_Sym * sym;
488 struct elf_link_hash_entry * h;
490 bfd_reloc_status_type r;
491 const char * name = NULL;
493 r_symndx = ELF32_R_SYM (rel->r_info);
495 if (info->relocateable)
497 /* This is a relocateable link. We don't have to change
498 anything, unless the reloc is against a section symbol,
499 in which case we have to adjust according to where the
500 section symbol winds up in the output section. */
501 if (r_symndx < symtab_hdr->sh_info)
503 sym = local_syms + r_symndx;
505 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
507 sec = local_sections [r_symndx];
508 rel->r_addend += sec->output_offset + sym->st_value;
515 /* This is a final link. */
516 howto = fr30_elf_howto_table + ELF32_R_TYPE (rel->r_info);
521 if (r_symndx < symtab_hdr->sh_info)
523 sym = local_syms + r_symndx;
524 sec = local_sections [r_symndx];
525 relocation = (sec->output_section->vma
529 name = bfd_elf_string_from_elf_section
530 (input_bfd, symtab_hdr->sh_link, sym->st_name);
531 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
533 fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
534 sec->name, name, sym->st_name,
535 sec->output_section->vma, sec->output_offset,
536 sym->st_value, rel->r_addend);
541 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
543 while (h->root.type == bfd_link_hash_indirect
544 || h->root.type == bfd_link_hash_warning)
545 h = (struct elf_link_hash_entry *) h->root.u.i.link;
547 name = h->root.root.string;
549 if (h->root.type == bfd_link_hash_defined
550 || h->root.type == bfd_link_hash_defweak)
552 sec = h->root.u.def.section;
553 relocation = (h->root.u.def.value
554 + sec->output_section->vma
555 + sec->output_offset);
558 "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n",
559 sec->name, name, h->root.u.def.value,
560 sec->output_section->vma, sec->output_offset, relocation);
563 else if (h->root.type == bfd_link_hash_undefweak)
566 fprintf (stderr, "undefined: sec: %s, name: %s\n",
573 if (! ((*info->callbacks->undefined_symbol)
574 (info, h->root.root.string, input_bfd,
575 input_section, rel->r_offset)))
578 fprintf (stderr, "unknown: name: %s\n", name);
584 r = fr30_final_link_relocate (howto, input_bfd, input_section,
585 contents, rel, relocation);
587 if (r != bfd_reloc_ok)
589 const char * msg = (const char *) NULL;
593 case bfd_reloc_overflow:
594 r = info->callbacks->reloc_overflow
595 (info, name, howto->name, (bfd_vma) 0,
596 input_bfd, input_section, rel->r_offset);
599 case bfd_reloc_undefined:
600 r = info->callbacks->undefined_symbol
601 (info, name, input_bfd, input_section, rel->r_offset);
604 case bfd_reloc_outofrange:
605 msg = _("internal error: out of range error");
608 case bfd_reloc_notsupported:
609 msg = _("internal error: unsupported relocation error");
612 case bfd_reloc_dangerous:
613 msg = _("internal error: dangerous relocation");
617 msg = _("internal error: unknown error");
622 r = info->callbacks->warning
623 (info, msg, name, input_bfd, input_section, rel->r_offset);
633 #define ELF_ARCH bfd_arch_fr30
634 #define ELF_MACHINE_CODE EM_CYGNUS_FR30
635 #define ELF_MAXPAGESIZE 0x1000
637 #define TARGET_BIG_SYM bfd_elf32_fr30_vec
638 #define TARGET_BIG_NAME "elf32-fr30"
640 #define elf_info_to_howto_rel NULL
641 #define elf_info_to_howto fr30_info_to_howto_rela
642 #define elf_backend_relocate_section fr30_elf_relocate_section
644 #define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup
646 #include "elf32-target.h"