1 /* M16C/M32C specific support for 32-bit ELF.
2 Copyright (C) 2005-2016 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 #include "libiberty.h"
27 /* Forward declarations. */
28 static reloc_howto_type * m32c_reloc_type_lookup
29 (bfd *, bfd_reloc_code_real_type);
30 static void m32c_info_to_howto_rela
31 (bfd *, arelent *, Elf_Internal_Rela *);
32 static bfd_boolean m32c_elf_relocate_section
33 (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
34 static bfd_boolean m32c_elf_check_relocs
35 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
36 static bfd_boolean m32c_elf_relax_delete_bytes (bfd *, asection *, bfd_vma, int);
38 char * m32c_get_reloc (long reloc);
39 void dump_symtab (bfd *, void *, void *);
41 static bfd_boolean m32c_elf_relax_section
42 (bfd *abfd, asection *sec, struct bfd_link_info *link_info, bfd_boolean *again);
43 static bfd_reloc_status_type m32c_apply_reloc_24
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static reloc_howto_type m32c_elf_howto_table [] =
49 /* This reloc does nothing. */
50 HOWTO (R_M32C_NONE, /* type */
52 3, /* size (0 = byte, 1 = short, 2 = long) */
54 FALSE, /* pc_relative */
56 complain_overflow_dont, /* complain_on_overflow */
57 bfd_elf_generic_reloc, /* special_function */
58 "R_M32C_NONE", /* name */
59 FALSE, /* partial_inplace */
62 FALSE), /* pcrel_offset */
64 /* GCC intentionally overflows these next two in order to work
65 around limitations in the addressing modes, so don't complain
67 HOWTO (R_M32C_16, /* type */
69 1, /* size (0 = byte, 1 = short, 2 = long) */
71 FALSE, /* pc_relative */
73 complain_overflow_dont, /* complain_on_overflow */
74 bfd_elf_generic_reloc, /* special_function */
75 "R_M32C_16", /* name */
76 FALSE, /* partial_inplace */
78 0xffff, /* dst_mask */
79 FALSE), /* pcrel_offset */
81 HOWTO (R_M32C_24, /* type */
83 2, /* size (0 = byte, 1 = short, 2 = long) */
85 FALSE, /* pc_relative */
87 complain_overflow_dont, /* complain_on_overflow */
88 m32c_apply_reloc_24, /* special_function */
89 "R_M32C_24", /* name */
90 FALSE, /* partial_inplace */
92 0xffffff, /* dst_mask */
93 FALSE), /* pcrel_offset */
95 HOWTO (R_M32C_32, /* type */
97 2, /* size (0 = byte, 1 = short, 2 = long) */
99 FALSE, /* pc_relative */
101 complain_overflow_bitfield, /* complain_on_overflow */
102 bfd_elf_generic_reloc, /* special_function */
103 "R_M32C_32", /* name */
104 FALSE, /* partial_inplace */
106 0xffffffff, /* dst_mask */
107 FALSE), /* pcrel_offset */
109 HOWTO (R_M32C_8_PCREL, /* type */
111 0, /* size (0 = byte, 1 = short, 2 = long) */
113 TRUE, /* pc_relative */
115 complain_overflow_signed, /* complain_on_overflow */
116 bfd_elf_generic_reloc, /* special_function */
117 "R_M32C_8_PCREL", /* name */
118 FALSE, /* partial_inplace */
121 TRUE), /* pcrel_offset */
123 HOWTO (R_M32C_16_PCREL, /* type */
125 1, /* size (0 = byte, 1 = short, 2 = long) */
127 TRUE, /* pc_relative */
129 complain_overflow_signed, /* complain_on_overflow */
130 bfd_elf_generic_reloc, /* special_function */
131 "R_M32C_16_PCREL", /* name */
132 FALSE, /* partial_inplace */
134 0xffff, /* dst_mask */
135 TRUE), /* pcrel_offset */
137 HOWTO (R_M32C_8, /* type */
139 0, /* size (0 = byte, 1 = short, 2 = long) */
141 FALSE, /* pc_relative */
143 complain_overflow_unsigned, /* complain_on_overflow */
144 bfd_elf_generic_reloc, /* special_function */
145 "R_M32C_8", /* name */
146 FALSE, /* partial_inplace */
149 FALSE), /* pcrel_offset */
151 HOWTO (R_M32C_LO16, /* type */
153 1, /* size (0 = byte, 1 = short, 2 = long) */
155 FALSE, /* pc_relative */
157 complain_overflow_dont, /* complain_on_overflow */
158 bfd_elf_generic_reloc, /* special_function */
159 "R_M32C_LO16", /* name */
160 FALSE, /* partial_inplace */
162 0xffff, /* dst_mask */
163 FALSE), /* pcrel_offset */
165 HOWTO (R_M32C_HI8, /* type */
167 0, /* size (0 = byte, 1 = short, 2 = long) */
169 FALSE, /* pc_relative */
171 complain_overflow_dont, /* complain_on_overflow */
172 bfd_elf_generic_reloc, /* special_function */
173 "R_M32C_HI8", /* name */
174 FALSE, /* partial_inplace */
177 FALSE), /* pcrel_offset */
179 HOWTO (R_M32C_HI16, /* type */
181 1, /* size (0 = byte, 1 = short, 2 = long) */
183 FALSE, /* pc_relative */
185 complain_overflow_dont, /* complain_on_overflow */
186 bfd_elf_generic_reloc, /* special_function */
187 "R_M32C_HI16", /* name */
188 FALSE, /* partial_inplace */
190 0xffff, /* dst_mask */
191 FALSE), /* pcrel_offset */
193 HOWTO (R_M32C_RL_JUMP, /* type */
195 0, /* size (0 = byte, 1 = short, 2 = long) */
197 FALSE, /* pc_relative */
199 complain_overflow_signed, /* complain_on_overflow */
200 bfd_elf_generic_reloc, /* special_function */
201 "R_M32C_RL_JUMP", /* name */
202 FALSE, /* partial_inplace */
205 FALSE), /* pcrel_offset */
207 HOWTO (R_M32C_RL_1ADDR, /* type */
209 0, /* size (0 = byte, 1 = short, 2 = long) */
211 FALSE, /* pc_relative */
213 complain_overflow_signed, /* complain_on_overflow */
214 bfd_elf_generic_reloc, /* special_function */
215 "R_M32C_RL_1ADDR", /* name */
216 FALSE, /* partial_inplace */
219 FALSE), /* pcrel_offset */
221 HOWTO (R_M32C_RL_2ADDR, /* type */
223 0, /* size (0 = byte, 1 = short, 2 = long) */
225 FALSE, /* pc_relative */
227 complain_overflow_signed, /* complain_on_overflow */
228 bfd_elf_generic_reloc, /* special_function */
229 "R_M32C_RL_2ADDR", /* name */
230 FALSE, /* partial_inplace */
233 FALSE), /* pcrel_offset */
237 /* Map BFD reloc types to M32C ELF reloc types. */
239 struct m32c_reloc_map
241 bfd_reloc_code_real_type bfd_reloc_val;
242 unsigned int m32c_reloc_val;
245 static const struct m32c_reloc_map m32c_reloc_map [] =
247 { BFD_RELOC_NONE, R_M32C_NONE },
248 { BFD_RELOC_16, R_M32C_16 },
249 { BFD_RELOC_24, R_M32C_24 },
250 { BFD_RELOC_32, R_M32C_32 },
251 { BFD_RELOC_8_PCREL, R_M32C_8_PCREL },
252 { BFD_RELOC_16_PCREL, R_M32C_16_PCREL },
253 { BFD_RELOC_8, R_M32C_8 },
254 { BFD_RELOC_LO16, R_M32C_LO16 },
255 { BFD_RELOC_HI16, R_M32C_HI16 },
256 { BFD_RELOC_M32C_HI8, R_M32C_HI8 },
257 { BFD_RELOC_M32C_RL_JUMP, R_M32C_RL_JUMP },
258 { BFD_RELOC_M32C_RL_1ADDR, R_M32C_RL_1ADDR },
259 { BFD_RELOC_M32C_RL_2ADDR, R_M32C_RL_2ADDR }
262 static reloc_howto_type *
263 m32c_reloc_type_lookup
264 (bfd * abfd ATTRIBUTE_UNUSED,
265 bfd_reloc_code_real_type code)
269 for (i = ARRAY_SIZE (m32c_reloc_map); i--;)
270 if (m32c_reloc_map [i].bfd_reloc_val == code)
271 return & m32c_elf_howto_table [m32c_reloc_map[i].m32c_reloc_val];
276 static reloc_howto_type *
277 m32c_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
282 i < sizeof (m32c_elf_howto_table) / sizeof (m32c_elf_howto_table[0]);
284 if (m32c_elf_howto_table[i].name != NULL
285 && strcasecmp (m32c_elf_howto_table[i].name, r_name) == 0)
286 return &m32c_elf_howto_table[i];
291 /* Set the howto pointer for an M32C ELF reloc. */
294 m32c_info_to_howto_rela
295 (bfd * abfd ATTRIBUTE_UNUSED,
297 Elf_Internal_Rela * dst)
301 r_type = ELF32_R_TYPE (dst->r_info);
302 if (r_type >= (unsigned int) R_M32C_max)
304 /* xgettext:c-format */
305 _bfd_error_handler (_("%B: invalid M32C reloc number: %d"), abfd, r_type);
308 cache_ptr->howto = & m32c_elf_howto_table [r_type];
313 /* Apply R_M32C_24 relocations. We have to do this because it's not a
314 power-of-two size, and the generic code may think it overruns the
315 section if it's right at the end.
317 Must return something other than bfd_reloc_continue to avoid the
318 above problem. Typical return values include bfd_reloc_ok or
322 static bfd_reloc_status_type m32c_apply_reloc_24 (bfd *abfd ATTRIBUTE_UNUSED,
323 arelent *reloc_entry,
325 void *vdata_start ATTRIBUTE_UNUSED,
326 asection *input_section,
327 bfd *ibfd ATTRIBUTE_UNUSED,
328 char **error_msg ATTRIBUTE_UNUSED)
331 bfd_reloc_status_type s;
333 s = bfd_elf_generic_reloc (abfd, reloc_entry, symbol,
335 input_section, ibfd, error_msg);
336 if (s != bfd_reloc_continue)
339 /* Get symbol value. (Common symbols are special.) */
340 if (bfd_is_com_section (symbol->section))
343 relocation = symbol->value;
345 relocation += symbol->section->output_offset;
347 /* Add in supplied addend. */
348 relocation += reloc_entry->addend;
350 reloc_entry->addend = relocation;
351 reloc_entry->address += input_section->output_offset;
355 /* Relocate an M32C ELF section.
356 There is some attempt to make this function usable for many architectures,
357 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
358 if only to serve as a learning tool.
360 The RELOCATE_SECTION function is called by the new ELF backend linker
361 to handle the relocations for a section.
363 The relocs are always passed as Rela structures; if the section
364 actually uses Rel structures, the r_addend field will always be
367 This function is responsible for adjusting the section contents as
368 necessary, and (if using Rela relocs and generating a relocatable
369 output file) adjusting the reloc addend as necessary.
371 This function does not have to worry about setting the reloc
372 address or the reloc symbol index.
374 LOCAL_SYMS is a pointer to the swapped in local symbols.
376 LOCAL_SECTIONS is an array giving the section in the input file
377 corresponding to the st_shndx field of each local symbol.
379 The global hash table entry for the global symbols can be found
380 via elf_sym_hashes (input_bfd).
382 When generating relocatable output, this function must handle
383 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
384 going to be the section symbol corresponding to the output
385 section, which means that the addend must be adjusted
389 m32c_elf_relocate_section
390 (bfd * output_bfd ATTRIBUTE_UNUSED,
391 struct bfd_link_info * info,
393 asection * input_section,
395 Elf_Internal_Rela * relocs,
396 Elf_Internal_Sym * local_syms,
397 asection ** local_sections)
399 Elf_Internal_Shdr * symtab_hdr;
400 struct elf_link_hash_entry ** sym_hashes;
401 Elf_Internal_Rela * rel;
402 Elf_Internal_Rela * relend;
406 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
407 sym_hashes = elf_sym_hashes (input_bfd);
408 relend = relocs + input_section->reloc_count;
410 dynobj = elf_hash_table (info)->dynobj;
413 splt = bfd_get_linker_section (dynobj, ".plt");
415 for (rel = relocs; rel < relend; rel ++)
417 reloc_howto_type * howto;
418 unsigned long r_symndx;
419 Elf_Internal_Sym * sym;
421 struct elf_link_hash_entry * h;
423 bfd_reloc_status_type r;
424 const char * name = NULL;
427 r_type = ELF32_R_TYPE (rel->r_info);
429 /* These are only used for relaxing; we don't actually relocate
430 anything with them, so skip them. */
431 if (r_type == R_M32C_RL_JUMP
432 || r_type == R_M32C_RL_1ADDR
433 || r_type == R_M32C_RL_2ADDR)
436 r_symndx = ELF32_R_SYM (rel->r_info);
438 howto = m32c_elf_howto_table + ELF32_R_TYPE (rel->r_info);
444 if (r_symndx < symtab_hdr->sh_info)
446 sym = local_syms + r_symndx;
447 sec = local_sections [r_symndx];
448 relocation = (sec->output_section->vma
452 name = bfd_elf_string_from_elf_section
453 (input_bfd, symtab_hdr->sh_link, sym->st_name);
454 name = (sym->st_name == 0) ? bfd_section_name (input_bfd, sec) : name;
458 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
460 if (info->wrap_hash != NULL
461 && (input_section->flags & SEC_DEBUGGING) != 0)
462 h = ((struct elf_link_hash_entry *)
463 unwrap_hash_lookup (info, input_bfd, &h->root));
465 while (h->root.type == bfd_link_hash_indirect
466 || h->root.type == bfd_link_hash_warning)
467 h = (struct elf_link_hash_entry *) h->root.u.i.link;
469 name = h->root.root.string;
471 if (h->root.type == bfd_link_hash_defined
472 || h->root.type == bfd_link_hash_defweak)
474 sec = h->root.u.def.section;
475 relocation = (h->root.u.def.value
476 + sec->output_section->vma
477 + sec->output_offset);
479 else if (h->root.type == bfd_link_hash_undefweak)
481 else if (!bfd_link_relocatable (info))
482 (*info->callbacks->undefined_symbol) (info, h->root.root.string,
483 input_bfd, input_section,
484 rel->r_offset, TRUE);
487 if (sec != NULL && discarded_section (sec))
488 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
489 rel, 1, relend, howto, 0, contents);
491 if (bfd_link_relocatable (info))
493 /* This is a relocatable link. We don't have to change
494 anything, unless the reloc is against a section symbol,
495 in which case we have to adjust according to where the
496 section symbol winds up in the output section. */
497 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
498 rel->r_addend += sec->output_offset;
502 switch (ELF32_R_TYPE (rel->r_info))
509 plt_offset = &h->plt.offset;
511 plt_offset = elf_local_got_offsets (input_bfd) + r_symndx;
513 /* printf("%s: rel %x plt %d\n", h ? h->root.root.string : "(none)",
514 relocation, *plt_offset);*/
515 if (relocation <= 0xffff)
517 /* If the symbol is in range for a 16-bit address, we should
518 have deallocated the plt entry in relax_section. */
519 BFD_ASSERT (*plt_offset == (bfd_vma) -1);
523 /* If the symbol is out of range for a 16-bit address,
524 we must have allocated a plt entry. */
525 BFD_ASSERT (*plt_offset != (bfd_vma) -1);
527 /* If this is the first time we've processed this symbol,
528 fill in the plt entry with the correct symbol address. */
529 if ((*plt_offset & 1) == 0)
533 x = 0x000000fc; /* jmpf */
534 x |= (relocation << 8) & 0xffffff00;
535 bfd_put_32 (input_bfd, x, splt->contents + *plt_offset);
539 relocation = (splt->output_section->vma
540 + splt->output_offset
541 + (*plt_offset & -2));
544 char *newname = bfd_malloc (strlen(name)+5);
545 strcpy (newname, name);
546 strcat(newname, ".plt");
547 _bfd_generic_link_add_one_symbol (info,
550 BSF_FUNCTION | BSF_WEAK,
569 printf ("relocate %s at %06lx relocation %06lx addend %ld ",
570 m32c_elf_howto_table[ELF32_R_TYPE(rel->r_info)].name,
571 rel->r_offset + input_section->output_section->vma + input_section->output_offset,
572 relocation, rel->r_addend);
576 printf (" %02x", contents[rel->r_offset+i]);
580 switch (ELF32_R_TYPE(rel->r_info))
583 /* Like m32c_apply_reloc_24, we must handle this one separately. */
584 relocation += rel->r_addend;
586 /* Sanity check the address. */
587 if (rel->r_offset + 3
588 > bfd_get_section_limit_octets (input_bfd, input_section))
589 r = bfd_reloc_outofrange;
592 bfd_put_8 (input_bfd, relocation & 0xff, contents + rel->r_offset);
593 bfd_put_8 (input_bfd, (relocation >> 8) & 0xff, contents + rel->r_offset + 1);
594 bfd_put_8 (input_bfd, (relocation >> 16) & 0xff, contents + rel->r_offset + 2);
601 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
602 contents, rel->r_offset, relocation,
607 if (r != bfd_reloc_ok)
609 const char * msg = (const char *) NULL;
613 case bfd_reloc_overflow:
614 (*info->callbacks->reloc_overflow)
615 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
616 input_bfd, input_section, rel->r_offset);
619 case bfd_reloc_undefined:
620 (*info->callbacks->undefined_symbol)
621 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
624 case bfd_reloc_outofrange:
625 msg = _("internal error: out of range error");
628 case bfd_reloc_notsupported:
629 msg = _("internal error: unsupported relocation error");
632 case bfd_reloc_dangerous:
633 msg = _("internal error: dangerous relocation");
637 msg = _("internal error: unknown error");
642 (*info->callbacks->warning) (info, msg, name, input_bfd,
643 input_section, rel->r_offset);
650 /* We support 16-bit pointers to code above 64k by generating a thunk
651 below 64k containing a JMP instruction to the final address. */
654 m32c_elf_check_relocs
656 struct bfd_link_info * info,
658 const Elf_Internal_Rela * relocs)
660 Elf_Internal_Shdr * symtab_hdr;
661 struct elf_link_hash_entry ** sym_hashes;
662 const Elf_Internal_Rela * rel;
663 const Elf_Internal_Rela * rel_end;
664 bfd_vma *local_plt_offsets;
668 if (bfd_link_relocatable (info))
671 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
672 sym_hashes = elf_sym_hashes (abfd);
673 local_plt_offsets = elf_local_got_offsets (abfd);
675 dynobj = elf_hash_table(info)->dynobj;
677 rel_end = relocs + sec->reloc_count;
678 for (rel = relocs; rel < rel_end; rel++)
680 struct elf_link_hash_entry *h;
681 unsigned long r_symndx;
684 r_symndx = ELF32_R_SYM (rel->r_info);
685 if (r_symndx < symtab_hdr->sh_info)
689 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
690 while (h->root.type == bfd_link_hash_indirect
691 || h->root.type == bfd_link_hash_warning)
692 h = (struct elf_link_hash_entry *) h->root.u.i.link;
694 /* PR15323, ref flags aren't set for references in the same
696 h->root.non_ir_ref = 1;
699 switch (ELF32_R_TYPE (rel->r_info))
701 /* This relocation describes a 16-bit pointer to a function.
702 We may need to allocate a thunk in low memory; reserve memory
706 elf_hash_table (info)->dynobj = dynobj = abfd;
709 splt = bfd_get_linker_section (dynobj, ".plt");
712 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
713 | SEC_IN_MEMORY | SEC_LINKER_CREATED
714 | SEC_READONLY | SEC_CODE);
715 splt = bfd_make_section_anyway_with_flags (dynobj, ".plt",
718 || ! bfd_set_section_alignment (dynobj, splt, 1))
724 offset = &h->plt.offset;
727 if (local_plt_offsets == NULL)
732 size = symtab_hdr->sh_info * sizeof (bfd_vma);
733 local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size);
734 if (local_plt_offsets == NULL)
736 elf_local_got_offsets (abfd) = local_plt_offsets;
738 for (i = 0; i < symtab_hdr->sh_info; i++)
739 local_plt_offsets[i] = (bfd_vma) -1;
741 offset = &local_plt_offsets[r_symndx];
744 if (*offset == (bfd_vma) -1)
746 *offset = splt->size;
756 /* This must exist if dynobj is ever set. */
759 m32c_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED,
760 struct bfd_link_info *info)
765 /* As an extra sanity check, verify that all plt entries have
768 if ((dynobj = elf_hash_table (info)->dynobj) != NULL
769 && (splt = bfd_get_linker_section (dynobj, ".plt")) != NULL)
771 bfd_byte *contents = splt->contents;
772 unsigned int i, size = splt->size;
773 for (i = 0; i < size; i += 4)
775 unsigned int x = bfd_get_32 (dynobj, contents + i);
784 m32c_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
785 struct bfd_link_info *info)
790 if (bfd_link_relocatable (info))
793 dynobj = elf_hash_table (info)->dynobj;
797 splt = bfd_get_linker_section (dynobj, ".plt");
798 BFD_ASSERT (splt != NULL);
800 splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size);
801 if (splt->contents == NULL)
807 /* Function to set the ELF flag bits. */
810 m32c_elf_set_private_flags (bfd *abfd, flagword flags)
812 elf_elfheader (abfd)->e_flags = flags;
813 elf_flags_init (abfd) = TRUE;
817 /* Merge backend specific data from an object file to the output
818 object file when linking. */
821 m32c_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
823 bfd *obfd = info->output_bfd;
824 flagword old_flags, old_partial;
825 flagword new_flags, new_partial;
826 bfd_boolean error = FALSE;
830 new_opt[0] = old_opt[0] = '\0';
831 new_flags = elf_elfheader (ibfd)->e_flags;
832 old_flags = elf_elfheader (obfd)->e_flags;
836 ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
837 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
838 bfd_get_filename (ibfd));
841 if (!elf_flags_init (obfd))
843 /* First call, no flags set. */
844 elf_flags_init (obfd) = TRUE;
845 elf_elfheader (obfd)->e_flags = new_flags;
848 else if (new_flags == old_flags)
849 /* Compatible flags are ok. */
852 else /* Possibly incompatible flags. */
854 /* Warn if different cpu is used (allow a specific cpu to override
856 new_partial = (new_flags & EF_M32C_CPU_MASK);
857 old_partial = (old_flags & EF_M32C_CPU_MASK);
858 if (new_partial == old_partial)
865 default: strcat (new_opt, " -m16c"); break;
866 case EF_M32C_CPU_M16C: strcat (new_opt, " -m16c"); break;
867 case EF_M32C_CPU_M32C: strcat (new_opt, " -m32c"); break;
872 default: strcat (old_opt, " -m16c"); break;
873 case EF_M32C_CPU_M16C: strcat (old_opt, " -m16c"); break;
874 case EF_M32C_CPU_M32C: strcat (old_opt, " -m32c"); break;
878 /* Print out any mismatches from above. */
883 /* xgettext:c-format */
884 (_("%s: compiled with %s and linked with modules compiled with %s"),
885 bfd_get_filename (ibfd), new_opt, old_opt);
888 new_flags &= ~ EF_M32C_ALL_FLAGS;
889 old_flags &= ~ EF_M32C_ALL_FLAGS;
891 /* Warn about any other mismatches. */
892 if (new_flags != old_flags)
896 /* xgettext:c-format */
897 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
898 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
903 bfd_set_error (bfd_error_bad_value);
910 m32c_elf_print_private_bfd_data (bfd *abfd, void *ptr)
912 FILE *file = (FILE *) ptr;
915 BFD_ASSERT (abfd != NULL && ptr != NULL);
917 /* Print normal ELF private data. */
918 _bfd_elf_print_private_bfd_data (abfd, ptr);
920 flags = elf_elfheader (abfd)->e_flags;
921 fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags);
923 switch (flags & EF_M32C_CPU_MASK)
926 case EF_M32C_CPU_M16C: fprintf (file, " -m16c"); break;
927 case EF_M32C_CPU_M32C: fprintf (file, " -m32c"); break;
934 /* Return the MACH for an e_flags value. */
937 elf32_m32c_machine (bfd *abfd)
939 switch (elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK)
941 case EF_M32C_CPU_M16C: return bfd_mach_m16c;
942 case EF_M32C_CPU_M32C: return bfd_mach_m32c;
945 return bfd_mach_m16c;
949 m32c_elf_object_p (bfd *abfd)
951 bfd_default_set_arch_mach (abfd, bfd_arch_m32c,
952 elf32_m32c_machine (abfd));
959 dump_symtab (bfd * abfd, void *internal_syms, void *external_syms)
962 Elf_Internal_Sym *isymbuf;
963 Elf_Internal_Sym *isymend;
964 Elf_Internal_Sym *isym;
965 Elf_Internal_Shdr *symtab_hdr;
966 bfd_boolean free_internal = 0, free_external = 0;
968 char * st_info_stb_str;
974 internal_syms = bfd_malloc (1000);
979 external_syms = bfd_malloc (1000);
983 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
984 locsymcount = symtab_hdr->sh_size / get_elf_backend_data(abfd)->s->sizeof_sym;
986 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
987 symtab_hdr->sh_info, 0,
988 internal_syms, external_syms, NULL);
990 isymbuf = internal_syms;
991 isymend = isymbuf + locsymcount;
993 for (isym = isymbuf ; isym < isymend ; isym++)
995 switch (ELF_ST_TYPE (isym->st_info))
998 st_info_str = "STT_FUNC";
1002 st_info_str = "STT_SECTION";
1006 st_info_str = "STT_FILE";
1010 st_info_str = "STT_OBJECT";
1014 st_info_str = "STT_TLS";
1021 switch (ELF_ST_BIND (isym->st_info))
1024 st_info_stb_str = "STB_LOCAL";
1028 st_info_stb_str = "STB_GLOBAL";
1032 st_info_stb_str = "";
1035 switch (ELF_ST_VISIBILITY (isym->st_other))
1038 st_other_str = "STV_DEFAULT";
1042 st_other_str = "STV_INTERNAL";
1046 st_other_str = "STV_PROTECTED";
1053 switch (isym->st_shndx)
1056 st_shndx_str = "SHN_ABS";
1060 st_shndx_str = "SHN_COMMON";
1064 st_shndx_str = "SHN_UNDEF";
1071 printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s "
1072 "st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n",
1074 (unsigned long) isym->st_value,
1075 (unsigned long) isym->st_size,
1077 bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link,
1079 isym->st_info, st_info_str, st_info_stb_str,
1080 isym->st_other, st_other_str,
1081 isym->st_shndx, st_shndx_str);
1084 free (internal_syms);
1086 free (external_syms);
1090 m32c_get_reloc (long reloc)
1092 if (0 <= reloc && reloc < R_M32C_max)
1093 return m32c_elf_howto_table[reloc].name;
1099 /* Handle relaxing. */
1101 /* A subroutine of m32c_elf_relax_section. If the global symbol H
1102 is within the low 64k, remove any entry for it in the plt. */
1104 struct relax_plt_data
1111 m32c_relax_plt_check (struct elf_link_hash_entry *h, void * xdata)
1113 struct relax_plt_data *data = (struct relax_plt_data *) xdata;
1115 if (h->plt.offset != (bfd_vma) -1)
1119 if (h->root.type == bfd_link_hash_undefined
1120 || h->root.type == bfd_link_hash_undefweak)
1123 address = (h->root.u.def.section->output_section->vma
1124 + h->root.u.def.section->output_offset
1125 + h->root.u.def.value);
1127 if (address <= 0xffff)
1130 data->splt->size -= 4;
1131 *data->again = TRUE;
1138 /* A subroutine of m32c_elf_relax_section. If the global symbol H
1139 previously had a plt entry, give it a new entry offset. */
1142 m32c_relax_plt_realloc (struct elf_link_hash_entry *h, void * xdata)
1144 bfd_vma *entry = (bfd_vma *) xdata;
1146 if (h->plt.offset != (bfd_vma) -1)
1148 h->plt.offset = *entry;
1156 m32c_elf_relax_plt_section (asection *splt,
1157 struct bfd_link_info *info,
1160 struct relax_plt_data relax_plt_data;
1163 /* Assume nothing changes. */
1166 if (bfd_link_relocatable (info))
1169 /* Quick check for an empty plt. */
1170 if (splt->size == 0)
1173 /* Map across all global symbols; see which ones happen to
1174 fall in the low 64k. */
1175 relax_plt_data.splt = splt;
1176 relax_plt_data.again = again;
1177 elf_link_hash_traverse (elf_hash_table (info), m32c_relax_plt_check,
1180 /* Likewise for local symbols, though that's somewhat less convenient
1181 as we have to walk the list of input bfds and swap in symbol data. */
1182 for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link.next)
1184 bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
1185 Elf_Internal_Shdr *symtab_hdr;
1186 Elf_Internal_Sym *isymbuf = NULL;
1189 if (! local_plt_offsets)
1192 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1193 if (symtab_hdr->sh_info != 0)
1195 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1196 if (isymbuf == NULL)
1197 isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
1198 symtab_hdr->sh_info, 0,
1200 if (isymbuf == NULL)
1204 for (idx = 0; idx < symtab_hdr->sh_info; ++idx)
1206 Elf_Internal_Sym *isym;
1210 if (local_plt_offsets[idx] == (bfd_vma) -1)
1213 isym = &isymbuf[idx];
1214 if (isym->st_shndx == SHN_UNDEF)
1216 else if (isym->st_shndx == SHN_ABS)
1217 tsec = bfd_abs_section_ptr;
1218 else if (isym->st_shndx == SHN_COMMON)
1219 tsec = bfd_com_section_ptr;
1221 tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx);
1223 address = (tsec->output_section->vma
1224 + tsec->output_offset
1226 if (address <= 0xffff)
1228 local_plt_offsets[idx] = -1;
1235 && symtab_hdr->contents != (unsigned char *) isymbuf)
1237 if (! info->keep_memory)
1241 /* Cache the symbols for elf_link_input_bfd. */
1242 symtab_hdr->contents = (unsigned char *) isymbuf;
1247 /* If we changed anything, walk the symbols again to reallocate
1248 .plt entry addresses. */
1249 if (*again && splt->size > 0)
1253 elf_link_hash_traverse (elf_hash_table (info),
1254 m32c_relax_plt_realloc, &entry);
1256 for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link.next)
1258 bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
1259 unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info;
1262 if (! local_plt_offsets)
1265 for (idx = 0; idx < nlocals; ++idx)
1266 if (local_plt_offsets[idx] != (bfd_vma) -1)
1268 local_plt_offsets[idx] = entry;
1278 compare_reloc (const void *e1, const void *e2)
1280 const Elf_Internal_Rela *i1 = (const Elf_Internal_Rela *) e1;
1281 const Elf_Internal_Rela *i2 = (const Elf_Internal_Rela *) e2;
1283 if (i1->r_offset == i2->r_offset)
1286 return i1->r_offset < i2->r_offset ? -1 : 1;
1289 #define OFFSET_FOR_RELOC(rel) m32c_offset_for_reloc (abfd, rel, symtab_hdr, shndx_buf, intsyms)
1291 m32c_offset_for_reloc (bfd *abfd,
1292 Elf_Internal_Rela *rel,
1293 Elf_Internal_Shdr *symtab_hdr,
1294 Elf_External_Sym_Shndx *shndx_buf ATTRIBUTE_UNUSED,
1295 Elf_Internal_Sym *intsyms)
1299 /* Get the value of the symbol referred to by the reloc. */
1300 if (ELF32_R_SYM (rel->r_info) < symtab_hdr->sh_info)
1302 /* A local symbol. */
1303 Elf_Internal_Sym *isym;
1306 isym = intsyms + ELF32_R_SYM (rel->r_info);
1307 ssec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1308 symval = isym->st_value;
1310 symval += ssec->output_section->vma
1311 + ssec->output_offset;
1316 struct elf_link_hash_entry *h;
1318 /* An external symbol. */
1319 indx = ELF32_R_SYM (rel->r_info) - symtab_hdr->sh_info;
1320 h = elf_sym_hashes (abfd)[indx];
1321 BFD_ASSERT (h != NULL);
1323 if (h->root.type != bfd_link_hash_defined
1324 && h->root.type != bfd_link_hash_defweak)
1325 /* This appears to be a reference to an undefined
1326 symbol. Just ignore it--it will be caught by the
1327 regular reloc processing. */
1330 symval = (h->root.u.def.value
1331 + h->root.u.def.section->output_section->vma
1332 + h->root.u.def.section->output_offset);
1337 static int bytes_saved = 0;
1339 static int bytes_to_reloc[] = {
1347 /* What we use the bits in a relax reloc addend (R_M32C_RL_*) for. */
1349 /* Mask for the number of relocs associated with this insn. */
1350 #define RLA_RELOCS 0x0000000f
1351 /* Number of bytes gas emitted (before gas's relaxing) */
1352 #define RLA_NBYTES 0x00000ff0
1354 /* If the displacement is within the given range and the new encoding
1355 differs from the old encoding (the index), then the insn can be
1356 relaxed to the new encoding. */
1359 unsigned int max_disp;
1360 unsigned char new_encoding;
1363 static EncodingTable m16c_addr_encodings[] = {
1364 { 0, 0, 0 }, /* R0 */
1365 { 0, 0, 1 }, /* R1 */
1366 { 0, 0, 2 }, /* R2 */
1367 { 0, 0, 3 }, /* R3 */
1368 { 0, 0, 4 }, /* A0 */
1369 { 0, 0, 5 }, /* A1 */
1370 { 0, 0, 6 }, /* [A0] */
1371 { 0, 0, 7 }, /* [A1] */
1372 { 1, 0, 6 }, /* udsp:8[A0] */
1373 { 1, 0, 7 }, /* udsp:8[A1] */
1374 { 1, 0, 10 }, /* udsp:8[SB] */
1375 { 1, 0, 11 }, /* sdsp:8[FB] */
1376 { 2, 255, 8 }, /* udsp:16[A0] */
1377 { 2, 255, 9 }, /* udsp:16[A1] */
1378 { 2, 255, 10 }, /* udsp:16[SB] */
1379 { 2, 0, 15 }, /* abs:16 */
1382 static EncodingTable m16c_jmpaddr_encodings[] = {
1383 { 0, 0, 0 }, /* R0 */
1384 { 0, 0, 1 }, /* R1 */
1385 { 0, 0, 2 }, /* R2 */
1386 { 0, 0, 3 }, /* R3 */
1387 { 0, 0, 4 }, /* A0 */
1388 { 0, 0, 5 }, /* A1 */
1389 { 0, 0, 6 }, /* [A0] */
1390 { 0, 0, 7 }, /* [A1] */
1391 { 1, 0, 6 }, /* udsp:8[A0] */
1392 { 1, 0, 7 }, /* udsp:8[A1] */
1393 { 1, 0, 10 }, /* udsp:8[SB] */
1394 { 1, 0, 11 }, /* sdsp:8[FB] */
1395 { 3, 255, 8 }, /* udsp:20[A0] */
1396 { 3, 255, 9 }, /* udsp:20[A1] */
1397 { 2, 255, 10 }, /* udsp:16[SB] */
1398 { 2, 0, 15 }, /* abs:16 */
1401 static EncodingTable m32c_addr_encodings[] = {
1402 { 0, 0, 0 }, /* [A0] */
1403 { 0, 0, 1 }, /* [A1] */
1404 { 0, 0, 2 }, /* A0 */
1405 { 0, 0, 3 }, /* A1 */
1406 { 1, 0, 0 }, /* udsp:8[A0] */
1407 { 1, 0, 1 }, /* udsp:8[A1] */
1408 { 1, 0, 6 }, /* udsp:8[SB] */
1409 { 1, 0, 7 }, /* sdsp:8[FB] */
1410 { 2, 255, 4 }, /* udsp:16[A0] */
1411 { 2, 255, 5 }, /* udsp:16[A1] */
1412 { 2, 255, 6 }, /* udsp:16[SB] */
1413 { 2, 127, 7 }, /* sdsp:16[FB] */
1414 { 3, 65535, 8 }, /* udsp:24[A0] */
1415 { 3, 65535, 9 }, /* udsp:24[A1] */
1416 { 3, 65535, 15 }, /* abs24 */
1417 { 2, 0, 15 }, /* abs16 */
1418 { 0, 0, 16 }, /* R2 */
1419 { 0, 0, 17 }, /* R3 */
1420 { 0, 0, 18 }, /* R0 */
1421 { 0, 0, 19 }, /* R1 */
1437 m32c_elf_relax_section
1440 struct bfd_link_info * link_info,
1441 bfd_boolean * again)
1443 Elf_Internal_Shdr *symtab_hdr;
1444 Elf_Internal_Shdr *shndx_hdr;
1445 Elf_Internal_Rela *internal_relocs;
1446 Elf_Internal_Rela *free_relocs = NULL;
1447 Elf_Internal_Rela *irel, *irelend, *srel;
1448 bfd_byte * contents = NULL;
1449 bfd_byte * free_contents = NULL;
1450 Elf_Internal_Sym *intsyms = NULL;
1451 Elf_Internal_Sym *free_intsyms = NULL;
1452 Elf_External_Sym_Shndx *shndx_buf = NULL;
1455 if (abfd == elf_hash_table (link_info)->dynobj
1456 && (sec->flags & SEC_LINKER_CREATED) != 0
1457 && strcmp (sec->name, ".plt") == 0)
1458 return m32c_elf_relax_plt_section (sec, link_info, again);
1460 /* Assume nothing changes. */
1463 machine = elf32_m32c_machine (abfd);
1465 /* We don't have to do anything for a relocatable link, if
1466 this section does not have relocs, or if this is not a
1468 if (bfd_link_relocatable (link_info)
1469 || (sec->flags & SEC_RELOC) == 0
1470 || sec->reloc_count == 0
1471 || (sec->flags & SEC_CODE) == 0)
1474 symtab_hdr = & elf_symtab_hdr (abfd);
1475 if (elf_symtab_shndx_list (abfd))
1476 shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr;
1480 /* Get the section contents. */
1481 if (elf_section_data (sec)->this_hdr.contents != NULL)
1482 contents = elf_section_data (sec)->this_hdr.contents;
1483 /* Go get them off disk. */
1484 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1487 /* Read this BFD's symbols. */
1488 /* Get cached copy if it exists. */
1489 if (symtab_hdr->contents != NULL)
1491 intsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
1495 intsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, symtab_hdr->sh_info, 0, NULL, NULL, NULL);
1496 symtab_hdr->contents = (bfd_byte *) intsyms;
1499 if (shndx_hdr && shndx_hdr->sh_size != 0)
1503 amt = symtab_hdr->sh_info;
1504 amt *= sizeof (Elf_External_Sym_Shndx);
1505 shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
1506 if (shndx_buf == NULL)
1508 if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
1509 || bfd_bread (shndx_buf, amt, abfd) != amt)
1511 shndx_hdr->contents = (bfd_byte *) shndx_buf;
1514 /* Get a copy of the native relocations. */
1515 internal_relocs = (_bfd_elf_link_read_relocs
1516 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
1517 link_info->keep_memory));
1518 if (internal_relocs == NULL)
1520 if (! link_info->keep_memory)
1521 free_relocs = internal_relocs;
1523 /* The RL_ relocs must be just before the operand relocs they go
1524 with, so we must sort them to guarantee this. */
1525 qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
1528 /* Walk through them looking for relaxing opportunities. */
1529 irelend = internal_relocs + sec->reloc_count;
1531 for (irel = internal_relocs; irel < irelend; irel++)
1534 unsigned char *insn, *gap, *einsn;
1536 bfd_signed_vma pcrel;
1542 EncodingTable *enctbl;
1545 if (ELF32_R_TYPE(irel->r_info) != R_M32C_RL_JUMP
1546 && ELF32_R_TYPE(irel->r_info) != R_M32C_RL_1ADDR
1547 && ELF32_R_TYPE(irel->r_info) != R_M32C_RL_2ADDR)
1552 /* There will always be room for the relaxed insn, since it is smaller
1553 than the one it would replace. */
1554 BFD_ASSERT (irel->r_offset < sec->size);
1556 insn = contents + irel->r_offset;
1557 relax_relocs = irel->r_addend % 16;
1559 /* Ok, we only have three relocs we care about, and they're all
1560 fake. The lower four bits of the addend is always the number
1561 of following relocs (hence the qsort above) that are assigned
1562 to this opcode. The next 8 bits of the addend indicates the
1563 number of bytes in the insn. We use the rest of them
1564 ourselves as flags for the more expensive operations (defines
1565 above). The three relocs are:
1567 RL_JUMP: This marks all direct jump insns. We check the
1568 displacement and replace them with shorter jumps if
1569 they're in range. We also use this to find JMP.S
1570 insns and manually shorten them when we delete bytes.
1571 We have to decode these insns to figure out what to
1574 RL_1ADDR: This is a :G or :Q insn, which has a single
1575 "standard" operand. We have to extract the type
1576 field, see if it's a wide displacement, then figure
1577 out if we can replace it with a narrow displacement.
1578 We don't have to decode these insns.
1580 RL_2ADDR: Similarly, but two "standard" operands. Note that
1581 r_addend may still be 1, as standard operands don't
1582 always have displacements. Gas shouldn't give us one
1583 with zero operands, but since we don't know which one
1584 has the displacement, we check them both anyway.
1586 These all point to the beginning of the insn itself, not the
1589 Note that we only relax one step at a time, relying on the
1590 linker to call us repeatedly. Thus, there is no code for
1591 JMP.A->JMP.B although that will happen in two steps.
1592 Likewise, for 2ADDR relaxes, we do one operand per cycle.
1595 /* Get the value of the symbol referred to by the reloc. Just
1596 in case this is the last reloc in the list, use the RL's
1597 addend to choose between this reloc (no addend) or the next
1598 (yes addend, which means at least one following reloc). */
1599 srel = irel + (relax_relocs ? 1 : 0);
1600 symval = OFFSET_FOR_RELOC (srel);
1602 /* Setting gap_size nonzero is the flag which means "something
1606 new_type = ELF32_R_TYPE(srel->r_info);
1608 pc = sec->output_section->vma + sec->output_offset
1610 pcrel = symval - pc + srel->r_addend;
1612 if (machine == bfd_mach_m16c)
1616 switch (ELF32_R_TYPE(irel->r_info))
1619 case R_M32C_RL_JUMP:
1622 case 0xfe: /* jmp.b */
1623 if (pcrel >= 2 && pcrel <= 9)
1625 /* Relax JMP.B -> JMP.S. We need to get rid of
1626 the following reloc though. */
1627 insn[0] = 0x60 | (pcrel - 2);
1628 new_type = R_M32C_NONE;
1629 irel->r_addend = 0x10;
1635 case 0xf4: /* jmp.w */
1636 /* 128 is allowed because it will be one byte closer
1637 after relaxing. Likewise for all other pc-rel
1639 if (pcrel <= 128 && pcrel >= -128)
1641 /* Relax JMP.W -> JMP.B */
1644 new_type = R_M32C_8_PCREL;
1650 case 0xfc: /* jmp.a */
1651 if (pcrel <= 32768 && pcrel >= -32768)
1653 /* Relax JMP.A -> JMP.W */
1657 new_type = R_M32C_16_PCREL;
1663 case 0xfd: /* jsr.a */
1664 if (pcrel <= 32768 && pcrel >= -32768)
1666 /* Relax JSR.A -> JSR.W */
1670 new_type = R_M32C_16_PCREL;
1678 case R_M32C_RL_2ADDR:
1679 /* xxxx xxxx srce dest [src-disp] [dest-disp]*/
1681 enctbl = m16c_addr_encodings;
1683 enc = (insn[1] >> 4) & 0x0f;
1686 if (srel->r_offset == irel->r_offset + posn
1687 && e->new_encoding != enc
1688 && symval <= e->max_disp)
1691 insn[1] |= e->new_encoding << 4;
1692 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1693 gap = insn + posn + enctbl[e->new_encoding].bytes;
1694 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1697 if (relax_relocs == 2)
1703 case R_M32C_RL_1ADDR:
1704 /* xxxx xxxx xxxx dest [disp] */
1706 enctbl = m16c_addr_encodings;
1709 /* Check the opcode for jumps. We know it's safe to
1710 do this because all 2ADDR insns are at least two
1712 enc = insn[0] * 256 + insn[1];
1719 enctbl = m16c_jmpaddr_encodings;
1723 /* srel, posn, and enc must be set here. */
1725 symval = OFFSET_FOR_RELOC (srel);
1726 enc = insn[1] & 0x0f;
1729 if (srel->r_offset == irel->r_offset + posn
1730 && e->new_encoding != enc
1731 && symval <= e->max_disp)
1734 insn[1] |= e->new_encoding;
1735 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1736 gap = insn + posn + enctbl[e->new_encoding].bytes;
1737 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1743 } /* Ends switch (reloc type) for m16c. */
1745 else /* machine == bfd_mach_m32c */
1749 switch (ELF32_R_TYPE(irel->r_info))
1752 case R_M32C_RL_JUMP:
1755 case 0xbb: /* jmp.b */
1756 if (pcrel >= 2 && pcrel <= 9)
1759 /* Relax JMP.B -> JMP.S. We need to get rid of
1760 the following reloc though. */
1761 insn[0] = 0x4a | ((p << 3) & 0x30) | (p & 1);
1762 new_type = R_M32C_NONE;
1763 irel->r_addend = 0x10;
1769 case 0xce: /* jmp.w */
1770 if (pcrel <= 128 && pcrel >= -128)
1772 /* Relax JMP.W -> JMP.B */
1775 new_type = R_M32C_8_PCREL;
1781 case 0xcc: /* jmp.a */
1782 if (pcrel <= 32768 && pcrel >= -32768)
1784 /* Relax JMP.A -> JMP.W */
1788 new_type = R_M32C_16_PCREL;
1794 case 0xcd: /* jsr.a */
1795 if (pcrel <= 32768 && pcrel >= -32768)
1797 /* Relax JSR.A -> JSR.W */
1801 new_type = R_M32C_16_PCREL;
1809 case R_M32C_RL_2ADDR:
1810 /* xSSS DDDx DDSS xxxx [src-disp] [dest-disp]*/
1816 /* prefix; remove it as far as the RL reloc is concerned. */
1821 enctbl = m32c_addr_encodings;
1822 enc = ((einsn[0] & 0x70) >> 2) | ((einsn[1] & 0x30) >> 4);
1825 if (srel->r_offset == irel->r_offset + posn
1826 && e->new_encoding != enc
1827 && symval <= e->max_disp)
1830 einsn[0] |= (e->new_encoding & 0x1c) << 2;
1832 einsn[1] |= (e->new_encoding & 0x03) << 4;
1833 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1834 gap = insn + posn + enctbl[e->new_encoding].bytes;
1835 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1838 if (relax_relocs == 2)
1844 case R_M32C_RL_1ADDR:
1845 /* xxxx DDDx DDxx xxxx [disp] */
1851 /* prefix; remove it as far as the RL reloc is concerned. */
1856 enctbl = m32c_addr_encodings;
1859 /* srel, posn, and enc must be set here. */
1861 symval = OFFSET_FOR_RELOC (srel);
1862 enc = ((einsn[0] & 0x0e) << 1) | ((einsn[1] & 0xc0) >> 6);
1865 if (srel->r_offset == irel->r_offset + posn
1866 && e->new_encoding != enc
1867 && symval <= e->max_disp)
1870 einsn[0] |= (e->new_encoding & 0x1c) >> 1;
1872 einsn[1] |= (e->new_encoding & 0x03) << 6;
1873 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1874 gap = insn + posn + enctbl[e->new_encoding].bytes;
1875 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1881 } /* Ends switch (reloc type) for m32c. */
1889 srel->r_info = ELF32_R_INFO (ELF32_R_SYM (srel->r_info), new_type);
1891 /* Note that we've changed the relocs, section contents, etc. */
1892 elf_section_data (sec)->relocs = internal_relocs;
1895 elf_section_data (sec)->this_hdr.contents = contents;
1896 free_contents = NULL;
1898 symtab_hdr->contents = (bfd_byte *) intsyms;
1899 free_intsyms = NULL;
1901 bytes_saved += gap_size;
1903 if (! m32c_elf_relax_delete_bytes(abfd, sec, gap - contents, gap_size))
1906 } /* next relocation */
1908 if (free_relocs != NULL)
1914 if (free_contents != NULL)
1916 if (! link_info->keep_memory)
1917 free (free_contents);
1918 /* Cache the section contents for elf_link_input_bfd. */
1920 elf_section_data (sec)->this_hdr.contents = contents;
1922 free_contents = NULL;
1925 if (shndx_buf != NULL)
1927 shndx_hdr->contents = NULL;
1931 if (free_intsyms != NULL)
1933 if (! link_info->keep_memory)
1934 free (free_intsyms);
1935 /* Cache the symbols for elf_link_input_bfd. */
1938 symtab_hdr->contents = NULL /* (unsigned char *) intsyms*/;
1941 free_intsyms = NULL;
1947 if (free_relocs != NULL)
1949 if (free_contents != NULL)
1950 free (free_contents);
1951 if (shndx_buf != NULL)
1953 shndx_hdr->contents = NULL;
1956 if (free_intsyms != NULL)
1957 free (free_intsyms);
1961 /* Delete some bytes from a section while relaxing. */
1964 m32c_elf_relax_delete_bytes
1970 Elf_Internal_Shdr *symtab_hdr;
1971 Elf_Internal_Shdr *shndx_hdr;
1974 Elf_Internal_Rela *irel;
1975 Elf_Internal_Rela *irelend;
1977 Elf_Internal_Sym *isym;
1978 Elf_Internal_Sym *isymend;
1979 Elf_Internal_Sym *intsyms;
1980 Elf_External_Sym_Shndx *shndx_buf;
1981 Elf_External_Sym_Shndx *shndx;
1982 struct elf_link_hash_entry ** sym_hashes;
1983 struct elf_link_hash_entry ** end_hashes;
1984 unsigned int symcount;
1986 contents = elf_section_data (sec)->this_hdr.contents;
1990 irel = elf_section_data (sec)->relocs;
1991 irelend = irel + sec->reloc_count;
1993 /* Actually delete the bytes. */
1994 memmove (contents + addr, contents + addr + count, (size_t) (toaddr - addr - count));
1997 /* Adjust all the relocs. */
1998 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel ++)
2000 /* Get the new reloc address. */
2001 if (irel->r_offset > addr && irel->r_offset < toaddr)
2002 irel->r_offset -= count;
2004 if (ELF32_R_TYPE(irel->r_info) == R_M32C_RL_JUMP
2005 && irel->r_addend == 0x10 /* one byte insn, no relocs */
2006 && irel->r_offset + 1 < addr
2007 && irel->r_offset + 7 > addr)
2010 unsigned char *insn = &contents[irel->r_offset];
2012 /* This is a JMP.S, which we have to manually update. */
2013 if (elf32_m32c_machine (abfd) == bfd_mach_m16c)
2015 if ((*insn & 0xf8) != 0x60)
2021 if ((*insn & 0xce) != 0x4a)
2023 disp = ((disp & 0x30) >> 3) | (disp & 1);
2025 if (irel->r_offset + disp + 2 >= addr+count)
2028 if (elf32_m32c_machine (abfd) == bfd_mach_m16c)
2030 *insn = (*insn & 0xf8) | disp;
2034 *insn = (*insn & 0xce) | ((disp & 6) << 3) | (disp & 1);
2040 /* Adjust the local symbols defined in this section. */
2041 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
2042 intsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
2044 isymend = isym + symtab_hdr->sh_info;
2046 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
2047 if (elf_symtab_shndx_list (abfd))
2049 shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr;
2050 shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents;
2059 for (; isym < isymend; isym++, shndx = (shndx ? shndx + 1 : NULL))
2061 /* If the symbol is in the range of memory we just moved, we
2062 have to adjust its value. */
2063 if ((int) isym->st_shndx == sec_shndx
2064 && isym->st_value > addr
2065 && isym->st_value < toaddr)
2067 isym->st_value -= count;
2069 /* If the symbol *spans* the bytes we just deleted (i.e. it's
2070 *end* is in the moved bytes but it's *start* isn't), then we
2071 must adjust its size. */
2072 if ((int) isym->st_shndx == sec_shndx
2073 && isym->st_value < addr
2074 && isym->st_value + isym->st_size > addr
2075 && isym->st_value + isym->st_size < toaddr)
2077 isym->st_size -= count;
2081 /* Now adjust the global symbols defined in this section. */
2082 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2083 - symtab_hdr->sh_info);
2084 sym_hashes = elf_sym_hashes (abfd);
2085 // sym_hashes += symtab_hdr->sh_info;
2086 end_hashes = sym_hashes + symcount;
2088 for (; sym_hashes < end_hashes; sym_hashes ++)
2090 struct elf_link_hash_entry * sym_hash = * sym_hashes;
2093 (sym_hash->root.type == bfd_link_hash_defined
2094 || sym_hash->root.type == bfd_link_hash_defweak)
2095 && sym_hash->root.u.def.section == sec)
2097 if (sym_hash->root.u.def.value > addr
2098 && sym_hash->root.u.def.value < toaddr)
2100 sym_hash->root.u.def.value -= count;
2102 if (sym_hash->root.u.def.value < addr
2103 && sym_hash->root.u.def.value + sym_hash->size > addr
2104 && sym_hash->root.u.def.value + sym_hash->size < toaddr)
2106 sym_hash->size -= count;
2114 /* This is for versions of gcc prior to 4.3. */
2116 _bfd_m32c_elf_eh_frame_address_size (bfd *abfd, asection *sec ATTRIBUTE_UNUSED)
2118 if ((elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK) == EF_M32C_CPU_M16C)
2125 #define ELF_ARCH bfd_arch_m32c
2126 #define ELF_MACHINE_CODE EM_M32C
2127 #define ELF_MACHINE_ALT1 EM_M32C_OLD
2128 #define ELF_MAXPAGESIZE 0x100
2131 #define TARGET_BIG_SYM m32c_elf32_vec
2132 #define TARGET_BIG_NAME "elf32-m32c"
2134 #define TARGET_LITTLE_SYM m32c_elf32_vec
2135 #define TARGET_LITTLE_NAME "elf32-m32c"
2138 #define elf_info_to_howto_rel NULL
2139 #define elf_info_to_howto m32c_info_to_howto_rela
2140 #define elf_backend_object_p m32c_elf_object_p
2141 #define elf_backend_relocate_section m32c_elf_relocate_section
2142 #define elf_backend_check_relocs m32c_elf_check_relocs
2143 #define elf_backend_object_p m32c_elf_object_p
2144 #define elf_symbol_leading_char ('_')
2145 #define elf_backend_always_size_sections \
2146 m32c_elf_always_size_sections
2147 #define elf_backend_finish_dynamic_sections \
2148 m32c_elf_finish_dynamic_sections
2150 #define elf_backend_can_gc_sections 1
2151 #define elf_backend_eh_frame_address_size _bfd_m32c_elf_eh_frame_address_size
2153 #define bfd_elf32_bfd_reloc_type_lookup m32c_reloc_type_lookup
2154 #define bfd_elf32_bfd_reloc_name_lookup m32c_reloc_name_lookup
2155 #define bfd_elf32_bfd_relax_section m32c_elf_relax_section
2156 #define bfd_elf32_bfd_set_private_flags m32c_elf_set_private_flags
2157 #define bfd_elf32_bfd_merge_private_bfd_data m32c_elf_merge_private_bfd_data
2158 #define bfd_elf32_bfd_print_private_bfd_data m32c_elf_print_private_bfd_data
2160 #include "elf32-target.h"