1 /* M16C/M32C specific support for 32-bit ELF.
2 Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
3 Free Software Foundation, Inc.
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 3 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. */
26 #include "libiberty.h"
28 /* Forward declarations. */
29 static reloc_howto_type * m32c_reloc_type_lookup
30 (bfd *, bfd_reloc_code_real_type);
31 static void m32c_info_to_howto_rela
32 (bfd *, arelent *, Elf_Internal_Rela *);
33 static bfd_boolean m32c_elf_relocate_section
34 (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
35 static bfd_boolean m32c_elf_check_relocs
36 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
37 static bfd_boolean m32c_elf_relax_delete_bytes (bfd *, asection *, bfd_vma, int);
39 char * m32c_get_reloc (long reloc);
40 void dump_symtab (bfd *, void *, void *);
42 static bfd_boolean m32c_elf_relax_section
43 (bfd *abfd, asection *sec, struct bfd_link_info *link_info, bfd_boolean *again);
46 static reloc_howto_type m32c_elf_howto_table [] =
48 /* This reloc does nothing. */
49 HOWTO (R_M32C_NONE, /* type */
51 0, /* size (0 = byte, 1 = short, 2 = long) */
53 FALSE, /* pc_relative */
55 complain_overflow_bitfield, /* complain_on_overflow */
56 bfd_elf_generic_reloc, /* special_function */
57 "R_M32C_NONE", /* name */
58 FALSE, /* partial_inplace */
61 FALSE), /* pcrel_offset */
63 /* GCC intentionally overflows these next two in order to work
64 around limitations in the addressing modes, so don't complain
66 HOWTO (R_M32C_16, /* type */
68 1, /* size (0 = byte, 1 = short, 2 = long) */
70 FALSE, /* pc_relative */
72 complain_overflow_dont, /* complain_on_overflow */
73 bfd_elf_generic_reloc, /* special_function */
74 "R_M32C_16", /* name */
75 FALSE, /* partial_inplace */
77 0xffff, /* dst_mask */
78 FALSE), /* pcrel_offset */
80 HOWTO (R_M32C_24, /* type */
82 2, /* size (0 = byte, 1 = short, 2 = long) */
84 FALSE, /* pc_relative */
86 complain_overflow_dont, /* complain_on_overflow */
87 bfd_elf_generic_reloc, /* special_function */
88 "R_M32C_24", /* name */
89 FALSE, /* partial_inplace */
91 0xffffff, /* dst_mask */
92 FALSE), /* pcrel_offset */
94 HOWTO (R_M32C_32, /* type */
96 2, /* size (0 = byte, 1 = short, 2 = long) */
98 FALSE, /* pc_relative */
100 complain_overflow_bitfield, /* complain_on_overflow */
101 bfd_elf_generic_reloc, /* special_function */
102 "R_M32C_32", /* name */
103 FALSE, /* partial_inplace */
105 0xffffffff, /* dst_mask */
106 FALSE), /* pcrel_offset */
108 HOWTO (R_M32C_8_PCREL, /* type */
110 0, /* size (0 = byte, 1 = short, 2 = long) */
112 TRUE, /* pc_relative */
114 complain_overflow_signed, /* complain_on_overflow */
115 bfd_elf_generic_reloc, /* special_function */
116 "R_M32C_8_PCREL", /* name */
117 FALSE, /* partial_inplace */
120 TRUE), /* pcrel_offset */
122 HOWTO (R_M32C_16_PCREL, /* type */
124 1, /* size (0 = byte, 1 = short, 2 = long) */
126 TRUE, /* pc_relative */
128 complain_overflow_signed, /* complain_on_overflow */
129 bfd_elf_generic_reloc, /* special_function */
130 "R_M32C_16_PCREL", /* name */
131 FALSE, /* partial_inplace */
133 0xffff, /* dst_mask */
134 TRUE), /* pcrel_offset */
136 HOWTO (R_M32C_8, /* type */
138 0, /* size (0 = byte, 1 = short, 2 = long) */
140 FALSE, /* pc_relative */
142 complain_overflow_unsigned, /* complain_on_overflow */
143 bfd_elf_generic_reloc, /* special_function */
144 "R_M32C_8", /* name */
145 FALSE, /* partial_inplace */
148 FALSE), /* pcrel_offset */
150 HOWTO (R_M32C_LO16, /* type */
152 1, /* size (0 = byte, 1 = short, 2 = long) */
154 FALSE, /* pc_relative */
156 complain_overflow_dont, /* complain_on_overflow */
157 bfd_elf_generic_reloc, /* special_function */
158 "R_M32C_LO16", /* name */
159 FALSE, /* partial_inplace */
161 0xffff, /* dst_mask */
162 FALSE), /* pcrel_offset */
164 HOWTO (R_M32C_HI8, /* type */
166 0, /* size (0 = byte, 1 = short, 2 = long) */
168 FALSE, /* pc_relative */
170 complain_overflow_dont, /* complain_on_overflow */
171 bfd_elf_generic_reloc, /* special_function */
172 "R_M32C_HI8", /* name */
173 FALSE, /* partial_inplace */
176 FALSE), /* pcrel_offset */
178 HOWTO (R_M32C_HI16, /* type */
180 1, /* size (0 = byte, 1 = short, 2 = long) */
182 FALSE, /* pc_relative */
184 complain_overflow_dont, /* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_M32C_HI16", /* name */
187 FALSE, /* partial_inplace */
189 0xffff, /* dst_mask */
190 FALSE), /* pcrel_offset */
192 HOWTO (R_M32C_RL_JUMP, /* type */
194 0, /* size (0 = byte, 1 = short, 2 = long) */
196 FALSE, /* pc_relative */
198 complain_overflow_signed, /* complain_on_overflow */
199 bfd_elf_generic_reloc, /* special_function */
200 "R_M32C_RL_JUMP", /* name */
201 FALSE, /* partial_inplace */
204 FALSE), /* pcrel_offset */
206 HOWTO (R_M32C_RL_1ADDR, /* type */
208 0, /* size (0 = byte, 1 = short, 2 = long) */
210 FALSE, /* pc_relative */
212 complain_overflow_signed, /* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_M32C_RL_1ADDR", /* name */
215 FALSE, /* partial_inplace */
218 FALSE), /* pcrel_offset */
220 HOWTO (R_M32C_RL_2ADDR, /* type */
222 0, /* size (0 = byte, 1 = short, 2 = long) */
224 FALSE, /* pc_relative */
226 complain_overflow_signed, /* complain_on_overflow */
227 bfd_elf_generic_reloc, /* special_function */
228 "R_M32C_RL_2ADDR", /* name */
229 FALSE, /* partial_inplace */
232 FALSE), /* pcrel_offset */
236 /* Map BFD reloc types to M32C ELF reloc types. */
238 struct m32c_reloc_map
240 bfd_reloc_code_real_type bfd_reloc_val;
241 unsigned int m32c_reloc_val;
244 static const struct m32c_reloc_map m32c_reloc_map [] =
246 { BFD_RELOC_NONE, R_M32C_NONE },
247 { BFD_RELOC_16, R_M32C_16 },
248 { BFD_RELOC_24, R_M32C_24 },
249 { BFD_RELOC_32, R_M32C_32 },
250 { BFD_RELOC_8_PCREL, R_M32C_8_PCREL },
251 { BFD_RELOC_16_PCREL, R_M32C_16_PCREL },
252 { BFD_RELOC_8, R_M32C_8 },
253 { BFD_RELOC_LO16, R_M32C_LO16 },
254 { BFD_RELOC_HI16, R_M32C_HI16 },
255 { BFD_RELOC_M32C_HI8, R_M32C_HI8 },
256 { BFD_RELOC_M32C_RL_JUMP, R_M32C_RL_JUMP },
257 { BFD_RELOC_M32C_RL_1ADDR, R_M32C_RL_1ADDR },
258 { BFD_RELOC_M32C_RL_2ADDR, R_M32C_RL_2ADDR }
261 static reloc_howto_type *
262 m32c_reloc_type_lookup
263 (bfd * abfd ATTRIBUTE_UNUSED,
264 bfd_reloc_code_real_type code)
268 for (i = ARRAY_SIZE (m32c_reloc_map); --i;)
269 if (m32c_reloc_map [i].bfd_reloc_val == code)
270 return & m32c_elf_howto_table [m32c_reloc_map[i].m32c_reloc_val];
275 static reloc_howto_type *
276 m32c_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
281 i < sizeof (m32c_elf_howto_table) / sizeof (m32c_elf_howto_table[0]);
283 if (m32c_elf_howto_table[i].name != NULL
284 && strcasecmp (m32c_elf_howto_table[i].name, r_name) == 0)
285 return &m32c_elf_howto_table[i];
290 /* Set the howto pointer for an M32C ELF reloc. */
293 m32c_info_to_howto_rela
294 (bfd * abfd ATTRIBUTE_UNUSED,
296 Elf_Internal_Rela * dst)
300 r_type = ELF32_R_TYPE (dst->r_info);
301 BFD_ASSERT (r_type < (unsigned int) R_M32C_max);
302 cache_ptr->howto = & m32c_elf_howto_table [r_type];
307 /* Relocate an M32C ELF section.
308 There is some attempt to make this function usable for many architectures,
309 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
310 if only to serve as a learning tool.
312 The RELOCATE_SECTION function is called by the new ELF backend linker
313 to handle the relocations for a section.
315 The relocs are always passed as Rela structures; if the section
316 actually uses Rel structures, the r_addend field will always be
319 This function is responsible for adjusting the section contents as
320 necessary, and (if using Rela relocs and generating a relocatable
321 output file) adjusting the reloc addend as necessary.
323 This function does not have to worry about setting the reloc
324 address or the reloc symbol index.
326 LOCAL_SYMS is a pointer to the swapped in local symbols.
328 LOCAL_SECTIONS is an array giving the section in the input file
329 corresponding to the st_shndx field of each local symbol.
331 The global hash table entry for the global symbols can be found
332 via elf_sym_hashes (input_bfd).
334 When generating relocatable output, this function must handle
335 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
336 going to be the section symbol corresponding to the output
337 section, which means that the addend must be adjusted
341 m32c_elf_relocate_section
342 (bfd * output_bfd ATTRIBUTE_UNUSED,
343 struct bfd_link_info * info,
345 asection * input_section,
347 Elf_Internal_Rela * relocs,
348 Elf_Internal_Sym * local_syms,
349 asection ** local_sections)
351 Elf_Internal_Shdr * symtab_hdr;
352 struct elf_link_hash_entry ** sym_hashes;
353 Elf_Internal_Rela * rel;
354 Elf_Internal_Rela * relend;
358 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
359 sym_hashes = elf_sym_hashes (input_bfd);
360 relend = relocs + input_section->reloc_count;
362 dynobj = elf_hash_table (info)->dynobj;
365 splt = bfd_get_linker_section (dynobj, ".plt");
367 for (rel = relocs; 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;
376 const char * name = NULL;
379 r_type = ELF32_R_TYPE (rel->r_info);
381 /* These are only used for relaxing; we don't actually relocate
382 anything with them, so skip them. */
383 if (r_type == R_M32C_RL_JUMP
384 || r_type == R_M32C_RL_1ADDR
385 || r_type == R_M32C_RL_2ADDR)
388 r_symndx = ELF32_R_SYM (rel->r_info);
390 howto = m32c_elf_howto_table + ELF32_R_TYPE (rel->r_info);
396 if (r_symndx < symtab_hdr->sh_info)
398 sym = local_syms + r_symndx;
399 sec = local_sections [r_symndx];
400 relocation = (sec->output_section->vma
404 name = bfd_elf_string_from_elf_section
405 (input_bfd, symtab_hdr->sh_link, sym->st_name);
406 name = (sym->st_name == 0) ? bfd_section_name (input_bfd, sec) : name;
410 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
412 while (h->root.type == bfd_link_hash_indirect
413 || h->root.type == bfd_link_hash_warning)
414 h = (struct elf_link_hash_entry *) h->root.u.i.link;
416 name = h->root.root.string;
418 if (h->root.type == bfd_link_hash_defined
419 || h->root.type == bfd_link_hash_defweak)
421 sec = h->root.u.def.section;
422 relocation = (h->root.u.def.value
423 + sec->output_section->vma
424 + sec->output_offset);
426 else if (h->root.type == bfd_link_hash_undefweak)
428 else if (!info->relocatable)
430 if (! ((*info->callbacks->undefined_symbol)
431 (info, h->root.root.string, input_bfd,
432 input_section, rel->r_offset, TRUE)))
437 if (sec != NULL && discarded_section (sec))
438 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
439 rel, 1, relend, howto, 0, contents);
441 if (info->relocatable)
443 /* This is a relocatable link. We don't have to change
444 anything, unless the reloc is against a section symbol,
445 in which case we have to adjust according to where the
446 section symbol winds up in the output section. */
447 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
448 rel->r_addend += sec->output_offset;
452 switch (ELF32_R_TYPE (rel->r_info))
459 plt_offset = &h->plt.offset;
461 plt_offset = elf_local_got_offsets (input_bfd) + r_symndx;
463 /* printf("%s: rel %x plt %d\n", h ? h->root.root.string : "(none)",
464 relocation, *plt_offset);*/
465 if (relocation <= 0xffff)
467 /* If the symbol is in range for a 16-bit address, we should
468 have deallocated the plt entry in relax_section. */
469 BFD_ASSERT (*plt_offset == (bfd_vma) -1);
473 /* If the symbol is out of range for a 16-bit address,
474 we must have allocated a plt entry. */
475 BFD_ASSERT (*plt_offset != (bfd_vma) -1);
477 /* If this is the first time we've processed this symbol,
478 fill in the plt entry with the correct symbol address. */
479 if ((*plt_offset & 1) == 0)
483 x = 0x000000fc; /* jmpf */
484 x |= (relocation << 8) & 0xffffff00;
485 bfd_put_32 (input_bfd, x, splt->contents + *plt_offset);
489 relocation = (splt->output_section->vma
490 + splt->output_offset
491 + (*plt_offset & -2));
494 char *newname = bfd_malloc (strlen(name)+5);
495 strcpy (newname, name);
496 strcat(newname, ".plt");
497 _bfd_generic_link_add_one_symbol (info,
500 BSF_FUNCTION | BSF_WEAK,
519 printf ("relocate %s at %06lx relocation %06lx addend %ld ",
520 m32c_elf_howto_table[ELF32_R_TYPE(rel->r_info)].name,
521 rel->r_offset + input_section->output_section->vma + input_section->output_offset,
522 relocation, rel->r_addend);
526 printf (" %02x", contents[rel->r_offset+i]);
530 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
531 contents, rel->r_offset, relocation,
534 if (r != bfd_reloc_ok)
536 const char * msg = (const char *) NULL;
540 case bfd_reloc_overflow:
541 r = info->callbacks->reloc_overflow
542 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
543 input_bfd, input_section, rel->r_offset);
546 case bfd_reloc_undefined:
547 r = info->callbacks->undefined_symbol
548 (info, name, input_bfd, input_section, rel->r_offset,
552 case bfd_reloc_outofrange:
553 msg = _("internal error: out of range error");
556 case bfd_reloc_notsupported:
557 msg = _("internal error: unsupported relocation error");
560 case bfd_reloc_dangerous:
561 msg = _("internal error: dangerous relocation");
565 msg = _("internal error: unknown error");
570 r = info->callbacks->warning
571 (info, msg, name, input_bfd, input_section, rel->r_offset);
581 /* We support 16-bit pointers to code above 64k by generating a thunk
582 below 64k containing a JMP instruction to the final address. */
585 m32c_elf_check_relocs
587 struct bfd_link_info * info,
589 const Elf_Internal_Rela * relocs)
591 Elf_Internal_Shdr * symtab_hdr;
592 struct elf_link_hash_entry ** sym_hashes;
593 const Elf_Internal_Rela * rel;
594 const Elf_Internal_Rela * rel_end;
595 bfd_vma *local_plt_offsets;
599 if (info->relocatable)
602 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
603 sym_hashes = elf_sym_hashes (abfd);
604 local_plt_offsets = elf_local_got_offsets (abfd);
606 dynobj = elf_hash_table(info)->dynobj;
608 rel_end = relocs + sec->reloc_count;
609 for (rel = relocs; rel < rel_end; rel++)
611 struct elf_link_hash_entry *h;
612 unsigned long r_symndx;
615 r_symndx = ELF32_R_SYM (rel->r_info);
616 if (r_symndx < symtab_hdr->sh_info)
620 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
621 while (h->root.type == bfd_link_hash_indirect
622 || h->root.type == bfd_link_hash_warning)
623 h = (struct elf_link_hash_entry *) h->root.u.i.link;
626 switch (ELF32_R_TYPE (rel->r_info))
628 /* This relocation describes a 16-bit pointer to a function.
629 We may need to allocate a thunk in low memory; reserve memory
633 elf_hash_table (info)->dynobj = dynobj = abfd;
636 splt = bfd_get_linker_section (dynobj, ".plt");
639 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
640 | SEC_IN_MEMORY | SEC_LINKER_CREATED
641 | SEC_READONLY | SEC_CODE);
642 splt = bfd_make_section_anyway_with_flags (dynobj, ".plt",
645 || ! bfd_set_section_alignment (dynobj, splt, 1))
651 offset = &h->plt.offset;
654 if (local_plt_offsets == NULL)
659 size = symtab_hdr->sh_info * sizeof (bfd_vma);
660 local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size);
661 if (local_plt_offsets == NULL)
663 elf_local_got_offsets (abfd) = local_plt_offsets;
665 for (i = 0; i < symtab_hdr->sh_info; i++)
666 local_plt_offsets[i] = (bfd_vma) -1;
668 offset = &local_plt_offsets[r_symndx];
671 if (*offset == (bfd_vma) -1)
673 *offset = splt->size;
683 /* This must exist if dynobj is ever set. */
686 m32c_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED,
687 struct bfd_link_info *info)
692 /* As an extra sanity check, verify that all plt entries have
695 if ((dynobj = elf_hash_table (info)->dynobj) != NULL
696 && (splt = bfd_get_linker_section (dynobj, ".plt")) != NULL)
698 bfd_byte *contents = splt->contents;
699 unsigned int i, size = splt->size;
700 for (i = 0; i < size; i += 4)
702 unsigned int x = bfd_get_32 (dynobj, contents + i);
711 m32c_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
712 struct bfd_link_info *info)
717 if (info->relocatable)
720 dynobj = elf_hash_table (info)->dynobj;
724 splt = bfd_get_linker_section (dynobj, ".plt");
725 BFD_ASSERT (splt != NULL);
727 splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size);
728 if (splt->contents == NULL)
734 /* Function to set the ELF flag bits. */
737 m32c_elf_set_private_flags (bfd *abfd, flagword flags)
739 elf_elfheader (abfd)->e_flags = flags;
740 elf_flags_init (abfd) = TRUE;
744 /* Merge backend specific data from an object file to the output
745 object file when linking. */
748 m32c_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
750 flagword old_flags, old_partial;
751 flagword new_flags, new_partial;
752 bfd_boolean error = FALSE;
756 new_opt[0] = old_opt[0] = '\0';
757 new_flags = elf_elfheader (ibfd)->e_flags;
758 old_flags = elf_elfheader (obfd)->e_flags;
761 (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
762 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
763 bfd_get_filename (ibfd));
766 if (!elf_flags_init (obfd))
768 /* First call, no flags set. */
769 elf_flags_init (obfd) = TRUE;
770 elf_elfheader (obfd)->e_flags = new_flags;
773 else if (new_flags == old_flags)
774 /* Compatible flags are ok. */
777 else /* Possibly incompatible flags. */
779 /* Warn if different cpu is used (allow a specific cpu to override
781 new_partial = (new_flags & EF_M32C_CPU_MASK);
782 old_partial = (old_flags & EF_M32C_CPU_MASK);
783 if (new_partial == old_partial)
790 default: strcat (new_opt, " -m16c"); break;
791 case EF_M32C_CPU_M16C: strcat (new_opt, " -m16c"); break;
792 case EF_M32C_CPU_M32C: strcat (new_opt, " -m32c"); break;
797 default: strcat (old_opt, " -m16c"); break;
798 case EF_M32C_CPU_M16C: strcat (old_opt, " -m16c"); break;
799 case EF_M32C_CPU_M32C: strcat (old_opt, " -m32c"); break;
803 /* Print out any mismatches from above. */
807 (*_bfd_error_handler)
808 (_("%s: compiled with %s and linked with modules compiled with %s"),
809 bfd_get_filename (ibfd), new_opt, old_opt);
812 new_flags &= ~ EF_M32C_ALL_FLAGS;
813 old_flags &= ~ EF_M32C_ALL_FLAGS;
815 /* Warn about any other mismatches. */
816 if (new_flags != old_flags)
819 (*_bfd_error_handler)
820 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
821 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
826 bfd_set_error (bfd_error_bad_value);
833 m32c_elf_print_private_bfd_data (bfd *abfd, void *ptr)
835 FILE *file = (FILE *) ptr;
838 BFD_ASSERT (abfd != NULL && ptr != NULL);
840 /* Print normal ELF private data. */
841 _bfd_elf_print_private_bfd_data (abfd, ptr);
843 flags = elf_elfheader (abfd)->e_flags;
844 fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags);
846 switch (flags & EF_M32C_CPU_MASK)
849 case EF_M32C_CPU_M16C: fprintf (file, " -m16c"); break;
850 case EF_M32C_CPU_M32C: fprintf (file, " -m32c"); break;
857 /* Return the MACH for an e_flags value. */
860 elf32_m32c_machine (bfd *abfd)
862 switch (elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK)
864 case EF_M32C_CPU_M16C: return bfd_mach_m16c;
865 case EF_M32C_CPU_M32C: return bfd_mach_m32c;
868 return bfd_mach_m16c;
872 m32c_elf_object_p (bfd *abfd)
874 bfd_default_set_arch_mach (abfd, bfd_arch_m32c,
875 elf32_m32c_machine (abfd));
882 dump_symtab (bfd * abfd, void *internal_syms, void *external_syms)
885 Elf_Internal_Sym *isymbuf;
886 Elf_Internal_Sym *isymend;
887 Elf_Internal_Sym *isym;
888 Elf_Internal_Shdr *symtab_hdr;
889 bfd_boolean free_internal = 0, free_external = 0;
891 char * st_info_stb_str;
897 internal_syms = bfd_malloc (1000);
902 external_syms = bfd_malloc (1000);
906 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
907 locsymcount = symtab_hdr->sh_size / get_elf_backend_data(abfd)->s->sizeof_sym;
909 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
910 symtab_hdr->sh_info, 0,
911 internal_syms, external_syms, NULL);
913 isymbuf = internal_syms;
914 isymend = isymbuf + locsymcount;
916 for (isym = isymbuf ; isym < isymend ; isym++)
918 switch (ELF_ST_TYPE (isym->st_info))
920 case STT_FUNC: st_info_str = "STT_FUNC";
921 case STT_SECTION: st_info_str = "STT_SECTION";
922 case STT_FILE: st_info_str = "STT_FILE";
923 case STT_OBJECT: st_info_str = "STT_OBJECT";
924 case STT_TLS: st_info_str = "STT_TLS";
925 default: st_info_str = "";
927 switch (ELF_ST_BIND (isym->st_info))
929 case STB_LOCAL: st_info_stb_str = "STB_LOCAL";
930 case STB_GLOBAL: st_info_stb_str = "STB_GLOBAL";
931 default: st_info_stb_str = "";
933 switch (ELF_ST_VISIBILITY (isym->st_other))
935 case STV_DEFAULT: st_other_str = "STV_DEFAULT";
936 case STV_INTERNAL: st_other_str = "STV_INTERNAL";
937 case STV_PROTECTED: st_other_str = "STV_PROTECTED";
938 default: st_other_str = "";
940 switch (isym->st_shndx)
942 case SHN_ABS: st_shndx_str = "SHN_ABS";
943 case SHN_COMMON: st_shndx_str = "SHN_COMMON";
944 case SHN_UNDEF: st_shndx_str = "SHN_UNDEF";
945 default: st_shndx_str = "";
948 printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s "
949 "st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n",
951 (unsigned long) isym->st_value,
952 (unsigned long) isym->st_size,
954 bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link,
956 isym->st_info, st_info_str, st_info_stb_str,
957 isym->st_other, st_other_str,
958 isym->st_shndx, st_shndx_str);
961 free (internal_syms);
963 free (external_syms);
967 m32c_get_reloc (long reloc)
969 if (0 <= reloc && reloc < R_M32C_max)
970 return m32c_elf_howto_table[reloc].name;
976 /* Handle relaxing. */
978 /* A subroutine of m32c_elf_relax_section. If the global symbol H
979 is within the low 64k, remove any entry for it in the plt. */
981 struct relax_plt_data
988 m32c_relax_plt_check (struct elf_link_hash_entry *h, void * xdata)
990 struct relax_plt_data *data = (struct relax_plt_data *) xdata;
992 if (h->plt.offset != (bfd_vma) -1)
996 if (h->root.type == bfd_link_hash_undefined
997 || h->root.type == bfd_link_hash_undefweak)
1000 address = (h->root.u.def.section->output_section->vma
1001 + h->root.u.def.section->output_offset
1002 + h->root.u.def.value);
1004 if (address <= 0xffff)
1007 data->splt->size -= 4;
1008 *data->again = TRUE;
1015 /* A subroutine of m32c_elf_relax_section. If the global symbol H
1016 previously had a plt entry, give it a new entry offset. */
1019 m32c_relax_plt_realloc (struct elf_link_hash_entry *h, void * xdata)
1021 bfd_vma *entry = (bfd_vma *) xdata;
1023 if (h->plt.offset != (bfd_vma) -1)
1025 h->plt.offset = *entry;
1033 m32c_elf_relax_plt_section (asection *splt,
1034 struct bfd_link_info *info,
1037 struct relax_plt_data relax_plt_data;
1040 /* Assume nothing changes. */
1043 if (info->relocatable)
1046 /* Quick check for an empty plt. */
1047 if (splt->size == 0)
1050 /* Map across all global symbols; see which ones happen to
1051 fall in the low 64k. */
1052 relax_plt_data.splt = splt;
1053 relax_plt_data.again = again;
1054 elf_link_hash_traverse (elf_hash_table (info), m32c_relax_plt_check,
1057 /* Likewise for local symbols, though that's somewhat less convenient
1058 as we have to walk the list of input bfds and swap in symbol data. */
1059 for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
1061 bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
1062 Elf_Internal_Shdr *symtab_hdr;
1063 Elf_Internal_Sym *isymbuf = NULL;
1066 if (! local_plt_offsets)
1069 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1070 if (symtab_hdr->sh_info != 0)
1072 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1073 if (isymbuf == NULL)
1074 isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
1075 symtab_hdr->sh_info, 0,
1077 if (isymbuf == NULL)
1081 for (idx = 0; idx < symtab_hdr->sh_info; ++idx)
1083 Elf_Internal_Sym *isym;
1087 if (local_plt_offsets[idx] == (bfd_vma) -1)
1090 isym = &isymbuf[idx];
1091 if (isym->st_shndx == SHN_UNDEF)
1093 else if (isym->st_shndx == SHN_ABS)
1094 tsec = bfd_abs_section_ptr;
1095 else if (isym->st_shndx == SHN_COMMON)
1096 tsec = bfd_com_section_ptr;
1098 tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx);
1100 address = (tsec->output_section->vma
1101 + tsec->output_offset
1103 if (address <= 0xffff)
1105 local_plt_offsets[idx] = -1;
1112 && symtab_hdr->contents != (unsigned char *) isymbuf)
1114 if (! info->keep_memory)
1118 /* Cache the symbols for elf_link_input_bfd. */
1119 symtab_hdr->contents = (unsigned char *) isymbuf;
1124 /* If we changed anything, walk the symbols again to reallocate
1125 .plt entry addresses. */
1126 if (*again && splt->size > 0)
1130 elf_link_hash_traverse (elf_hash_table (info),
1131 m32c_relax_plt_realloc, &entry);
1133 for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
1135 bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
1136 unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info;
1139 if (! local_plt_offsets)
1142 for (idx = 0; idx < nlocals; ++idx)
1143 if (local_plt_offsets[idx] != (bfd_vma) -1)
1145 local_plt_offsets[idx] = entry;
1155 compare_reloc (const void *e1, const void *e2)
1157 const Elf_Internal_Rela *i1 = (const Elf_Internal_Rela *) e1;
1158 const Elf_Internal_Rela *i2 = (const Elf_Internal_Rela *) e2;
1160 if (i1->r_offset == i2->r_offset)
1163 return i1->r_offset < i2->r_offset ? -1 : 1;
1166 #define OFFSET_FOR_RELOC(rel) m32c_offset_for_reloc (abfd, rel, symtab_hdr, shndx_buf, intsyms)
1168 m32c_offset_for_reloc (bfd *abfd,
1169 Elf_Internal_Rela *rel,
1170 Elf_Internal_Shdr *symtab_hdr,
1171 Elf_External_Sym_Shndx *shndx_buf ATTRIBUTE_UNUSED,
1172 Elf_Internal_Sym *intsyms)
1176 /* Get the value of the symbol referred to by the reloc. */
1177 if (ELF32_R_SYM (rel->r_info) < symtab_hdr->sh_info)
1179 /* A local symbol. */
1180 Elf_Internal_Sym *isym;
1183 isym = intsyms + ELF32_R_SYM (rel->r_info);
1184 ssec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1185 symval = isym->st_value;
1187 symval += ssec->output_section->vma
1188 + ssec->output_offset;
1193 struct elf_link_hash_entry *h;
1195 /* An external symbol. */
1196 indx = ELF32_R_SYM (rel->r_info) - symtab_hdr->sh_info;
1197 h = elf_sym_hashes (abfd)[indx];
1198 BFD_ASSERT (h != NULL);
1200 if (h->root.type != bfd_link_hash_defined
1201 && h->root.type != bfd_link_hash_defweak)
1202 /* This appears to be a reference to an undefined
1203 symbol. Just ignore it--it will be caught by the
1204 regular reloc processing. */
1207 symval = (h->root.u.def.value
1208 + h->root.u.def.section->output_section->vma
1209 + h->root.u.def.section->output_offset);
1214 static int bytes_saved = 0;
1216 static int bytes_to_reloc[] = {
1224 /* What we use the bits in a relax reloc addend (R_M32C_RL_*) for. */
1226 /* Mask for the number of relocs associated with this insn. */
1227 #define RLA_RELOCS 0x0000000f
1228 /* Number of bytes gas emitted (before gas's relaxing) */
1229 #define RLA_NBYTES 0x00000ff0
1231 /* If the displacement is within the given range and the new encoding
1232 differs from the old encoding (the index), then the insn can be
1233 relaxed to the new encoding. */
1236 unsigned int max_disp;
1237 unsigned char new_encoding;
1240 static EncodingTable m16c_addr_encodings[] = {
1241 { 0, 0, 0 }, /* R0 */
1242 { 0, 0, 1 }, /* R1 */
1243 { 0, 0, 2 }, /* R2 */
1244 { 0, 0, 3 }, /* R3 */
1245 { 0, 0, 4 }, /* A0 */
1246 { 0, 0, 5 }, /* A1 */
1247 { 0, 0, 6 }, /* [A0] */
1248 { 0, 0, 7 }, /* [A1] */
1249 { 1, 0, 6 }, /* udsp:8[A0] */
1250 { 1, 0, 7 }, /* udsp:8[A1] */
1251 { 1, 0, 10 }, /* udsp:8[SB] */
1252 { 1, 0, 11 }, /* sdsp:8[FB] */
1253 { 2, 255, 8 }, /* udsp:16[A0] */
1254 { 2, 255, 9 }, /* udsp:16[A1] */
1255 { 2, 255, 10 }, /* udsp:16[SB] */
1256 { 2, 0, 15 }, /* abs:16 */
1259 static EncodingTable m16c_jmpaddr_encodings[] = {
1260 { 0, 0, 0 }, /* R0 */
1261 { 0, 0, 1 }, /* R1 */
1262 { 0, 0, 2 }, /* R2 */
1263 { 0, 0, 3 }, /* R3 */
1264 { 0, 0, 4 }, /* A0 */
1265 { 0, 0, 5 }, /* A1 */
1266 { 0, 0, 6 }, /* [A0] */
1267 { 0, 0, 7 }, /* [A1] */
1268 { 1, 0, 6 }, /* udsp:8[A0] */
1269 { 1, 0, 7 }, /* udsp:8[A1] */
1270 { 1, 0, 10 }, /* udsp:8[SB] */
1271 { 1, 0, 11 }, /* sdsp:8[FB] */
1272 { 3, 255, 8 }, /* udsp:20[A0] */
1273 { 3, 255, 9 }, /* udsp:20[A1] */
1274 { 2, 255, 10 }, /* udsp:16[SB] */
1275 { 2, 0, 15 }, /* abs:16 */
1278 static EncodingTable m32c_addr_encodings[] = {
1279 { 0, 0, 0 }, /* [A0] */
1280 { 0, 0, 1 }, /* [A1] */
1281 { 0, 0, 2 }, /* A0 */
1282 { 0, 0, 3 }, /* A1 */
1283 { 1, 0, 0 }, /* udsp:8[A0] */
1284 { 1, 0, 1 }, /* udsp:8[A1] */
1285 { 1, 0, 6 }, /* udsp:8[SB] */
1286 { 1, 0, 7 }, /* sdsp:8[FB] */
1287 { 2, 255, 4 }, /* udsp:16[A0] */
1288 { 2, 255, 5 }, /* udsp:16[A1] */
1289 { 2, 255, 6 }, /* udsp:16[SB] */
1290 { 2, 127, 7 }, /* sdsp:16[FB] */
1291 { 3, 65535, 8 }, /* udsp:24[A0] */
1292 { 3, 65535, 9 }, /* udsp:24[A1] */
1293 { 3, 65535, 15 }, /* abs24 */
1294 { 2, 0, 15 }, /* abs16 */
1295 { 0, 0, 16 }, /* R2 */
1296 { 0, 0, 17 }, /* R3 */
1297 { 0, 0, 18 }, /* R0 */
1298 { 0, 0, 19 }, /* R1 */
1314 m32c_elf_relax_section
1317 struct bfd_link_info * link_info,
1318 bfd_boolean * again)
1320 Elf_Internal_Shdr *symtab_hdr;
1321 Elf_Internal_Shdr *shndx_hdr;
1322 Elf_Internal_Rela *internal_relocs;
1323 Elf_Internal_Rela *free_relocs = NULL;
1324 Elf_Internal_Rela *irel, *irelend, *srel;
1325 bfd_byte * contents = NULL;
1326 bfd_byte * free_contents = NULL;
1327 Elf_Internal_Sym *intsyms = NULL;
1328 Elf_Internal_Sym *free_intsyms = NULL;
1329 Elf_External_Sym_Shndx *shndx_buf = NULL;
1332 if (abfd == elf_hash_table (link_info)->dynobj
1333 && (sec->flags & SEC_LINKER_CREATED) != 0
1334 && strcmp (sec->name, ".plt") == 0)
1335 return m32c_elf_relax_plt_section (sec, link_info, again);
1337 /* Assume nothing changes. */
1340 machine = elf32_m32c_machine (abfd);
1342 /* We don't have to do anything for a relocatable link, if
1343 this section does not have relocs, or if this is not a
1345 if (link_info->relocatable
1346 || (sec->flags & SEC_RELOC) == 0
1347 || sec->reloc_count == 0
1348 || (sec->flags & SEC_CODE) == 0)
1351 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1352 shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
1354 /* Get the section contents. */
1355 if (elf_section_data (sec)->this_hdr.contents != NULL)
1356 contents = elf_section_data (sec)->this_hdr.contents;
1357 /* Go get them off disk. */
1358 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1361 /* Read this BFD's symbols. */
1362 /* Get cached copy if it exists. */
1363 if (symtab_hdr->contents != NULL)
1365 intsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
1369 intsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, symtab_hdr->sh_info, 0, NULL, NULL, NULL);
1370 symtab_hdr->contents = (bfd_byte *) intsyms;
1373 if (shndx_hdr->sh_size != 0)
1377 amt = symtab_hdr->sh_info;
1378 amt *= sizeof (Elf_External_Sym_Shndx);
1379 shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
1380 if (shndx_buf == NULL)
1382 if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
1383 || bfd_bread (shndx_buf, amt, abfd) != amt)
1385 shndx_hdr->contents = (bfd_byte *) shndx_buf;
1388 /* Get a copy of the native relocations. */
1389 internal_relocs = (_bfd_elf_link_read_relocs
1390 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
1391 link_info->keep_memory));
1392 if (internal_relocs == NULL)
1394 if (! link_info->keep_memory)
1395 free_relocs = internal_relocs;
1397 /* The RL_ relocs must be just before the operand relocs they go
1398 with, so we must sort them to guarantee this. */
1399 qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
1402 /* Walk through them looking for relaxing opportunities. */
1403 irelend = internal_relocs + sec->reloc_count;
1405 for (irel = internal_relocs; irel < irelend; irel++)
1408 unsigned char *insn, *gap, *einsn;
1410 bfd_signed_vma pcrel;
1416 EncodingTable *enctbl;
1419 if (ELF32_R_TYPE(irel->r_info) != R_M32C_RL_JUMP
1420 && ELF32_R_TYPE(irel->r_info) != R_M32C_RL_1ADDR
1421 && ELF32_R_TYPE(irel->r_info) != R_M32C_RL_2ADDR)
1426 /* There will always be room for the relaxed insn, since it is smaller
1427 than the one it would replace. */
1428 BFD_ASSERT (irel->r_offset < sec->size);
1430 insn = contents + irel->r_offset;
1431 relax_relocs = irel->r_addend % 16;
1433 /* Ok, we only have three relocs we care about, and they're all
1434 fake. The lower four bits of the addend is always the number
1435 of following relocs (hence the qsort above) that are assigned
1436 to this opcode. The next 8 bits of the addend indicates the
1437 number of bytes in the insn. We use the rest of them
1438 ourselves as flags for the more expensive operations (defines
1439 above). The three relocs are:
1441 RL_JUMP: This marks all direct jump insns. We check the
1442 displacement and replace them with shorter jumps if
1443 they're in range. We also use this to find JMP.S
1444 insns and manually shorten them when we delete bytes.
1445 We have to decode these insns to figure out what to
1448 RL_1ADDR: This is a :G or :Q insn, which has a single
1449 "standard" operand. We have to extract the type
1450 field, see if it's a wide displacement, then figure
1451 out if we can replace it with a narrow displacement.
1452 We don't have to decode these insns.
1454 RL_2ADDR: Similarly, but two "standard" operands. Note that
1455 r_addend may still be 1, as standard operands don't
1456 always have displacements. Gas shouldn't give us one
1457 with zero operands, but since we don't know which one
1458 has the displacement, we check them both anyway.
1460 These all point to the beginning of the insn itself, not the
1463 Note that we only relax one step at a time, relying on the
1464 linker to call us repeatedly. Thus, there is no code for
1465 JMP.A->JMP.B although that will happen in two steps.
1466 Likewise, for 2ADDR relaxes, we do one operand per cycle.
1469 /* Get the value of the symbol referred to by the reloc. Just
1470 in case this is the last reloc in the list, use the RL's
1471 addend to choose between this reloc (no addend) or the next
1472 (yes addend, which means at least one following reloc). */
1473 srel = irel + (relax_relocs ? 1 : 0);
1474 symval = OFFSET_FOR_RELOC (srel);
1476 /* Setting gap_size nonzero is the flag which means "something
1480 new_type = ELF32_R_TYPE(srel->r_info);
1482 pc = sec->output_section->vma + sec->output_offset
1484 pcrel = symval - pc + srel->r_addend;
1486 if (machine == bfd_mach_m16c)
1490 switch (ELF32_R_TYPE(irel->r_info))
1493 case R_M32C_RL_JUMP:
1496 case 0xfe: /* jmp.b */
1497 if (pcrel >= 2 && pcrel <= 9)
1499 /* Relax JMP.B -> JMP.S. We need to get rid of
1500 the following reloc though. */
1501 insn[0] = 0x60 | (pcrel - 2);
1502 new_type = R_M32C_NONE;
1503 irel->r_addend = 0x10;
1509 case 0xf4: /* jmp.w */
1510 /* 128 is allowed because it will be one byte closer
1511 after relaxing. Likewise for all other pc-rel
1513 if (pcrel <= 128 && pcrel >= -128)
1515 /* Relax JMP.W -> JMP.B */
1518 new_type = R_M32C_8_PCREL;
1524 case 0xfc: /* jmp.a */
1525 if (pcrel <= 32768 && pcrel >= -32768)
1527 /* Relax JMP.A -> JMP.W */
1531 new_type = R_M32C_16_PCREL;
1537 case 0xfd: /* jsr.a */
1538 if (pcrel <= 32768 && pcrel >= -32768)
1540 /* Relax JSR.A -> JSR.W */
1544 new_type = R_M32C_16_PCREL;
1552 case R_M32C_RL_2ADDR:
1553 /* xxxx xxxx srce dest [src-disp] [dest-disp]*/
1555 enctbl = m16c_addr_encodings;
1557 enc = (insn[1] >> 4) & 0x0f;
1560 if (srel->r_offset == irel->r_offset + posn
1561 && e->new_encoding != enc
1562 && symval <= e->max_disp)
1565 insn[1] |= e->new_encoding << 4;
1566 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1567 gap = insn + posn + enctbl[e->new_encoding].bytes;
1568 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1571 if (relax_relocs == 2)
1577 case R_M32C_RL_1ADDR:
1578 /* xxxx xxxx xxxx dest [disp] */
1580 enctbl = m16c_addr_encodings;
1583 /* Check the opcode for jumps. We know it's safe to
1584 do this because all 2ADDR insns are at least two
1586 enc = insn[0] * 256 + insn[1];
1593 enctbl = m16c_jmpaddr_encodings;
1597 /* srel, posn, and enc must be set here. */
1599 symval = OFFSET_FOR_RELOC (srel);
1600 enc = insn[1] & 0x0f;
1603 if (srel->r_offset == irel->r_offset + posn
1604 && e->new_encoding != enc
1605 && symval <= e->max_disp)
1608 insn[1] |= e->new_encoding;
1609 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1610 gap = insn + posn + enctbl[e->new_encoding].bytes;
1611 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1617 } /* Ends switch (reloc type) for m16c. */
1619 else /* machine == bfd_mach_m32c */
1623 switch (ELF32_R_TYPE(irel->r_info))
1626 case R_M32C_RL_JUMP:
1629 case 0xbb: /* jmp.b */
1630 if (pcrel >= 2 && pcrel <= 9)
1633 /* Relax JMP.B -> JMP.S. We need to get rid of
1634 the following reloc though. */
1635 insn[0] = 0x4a | ((p << 3) & 0x30) | (p & 1);
1636 new_type = R_M32C_NONE;
1637 irel->r_addend = 0x10;
1643 case 0xce: /* jmp.w */
1644 if (pcrel <= 128 && pcrel >= -128)
1646 /* Relax JMP.W -> JMP.B */
1649 new_type = R_M32C_8_PCREL;
1655 case 0xcc: /* jmp.a */
1656 if (pcrel <= 32768 && pcrel >= -32768)
1658 /* Relax JMP.A -> JMP.W */
1662 new_type = R_M32C_16_PCREL;
1668 case 0xcd: /* jsr.a */
1669 if (pcrel <= 32768 && pcrel >= -32768)
1671 /* Relax JSR.A -> JSR.W */
1675 new_type = R_M32C_16_PCREL;
1683 case R_M32C_RL_2ADDR:
1684 /* xSSS DDDx DDSS xxxx [src-disp] [dest-disp]*/
1690 /* prefix; remove it as far as the RL reloc is concerned. */
1695 enctbl = m32c_addr_encodings;
1696 enc = ((einsn[0] & 0x70) >> 2) | ((einsn[1] & 0x30) >> 4);
1699 if (srel->r_offset == irel->r_offset + posn
1700 && e->new_encoding != enc
1701 && symval <= e->max_disp)
1704 einsn[0] |= (e->new_encoding & 0x1c) << 2;
1706 einsn[1] |= (e->new_encoding & 0x03) << 4;
1707 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1708 gap = insn + posn + enctbl[e->new_encoding].bytes;
1709 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1712 if (relax_relocs == 2)
1718 case R_M32C_RL_1ADDR:
1719 /* xxxx DDDx DDxx xxxx [disp] */
1725 /* prefix; remove it as far as the RL reloc is concerned. */
1730 enctbl = m32c_addr_encodings;
1733 /* srel, posn, and enc must be set here. */
1735 symval = OFFSET_FOR_RELOC (srel);
1736 enc = ((einsn[0] & 0x0e) << 1) | ((einsn[1] & 0xc0) >> 6);
1739 if (srel->r_offset == irel->r_offset + posn
1740 && e->new_encoding != enc
1741 && symval <= e->max_disp)
1744 einsn[0] |= (e->new_encoding & 0x1c) >> 1;
1746 einsn[1] |= (e->new_encoding & 0x03) << 6;
1747 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1748 gap = insn + posn + enctbl[e->new_encoding].bytes;
1749 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1755 } /* Ends switch (reloc type) for m32c. */
1763 srel->r_info = ELF32_R_INFO (ELF32_R_SYM (srel->r_info), new_type);
1765 /* Note that we've changed the relocs, section contents, etc. */
1766 elf_section_data (sec)->relocs = internal_relocs;
1769 elf_section_data (sec)->this_hdr.contents = contents;
1770 free_contents = NULL;
1772 symtab_hdr->contents = (bfd_byte *) intsyms;
1773 free_intsyms = NULL;
1775 bytes_saved += gap_size;
1777 if (! m32c_elf_relax_delete_bytes(abfd, sec, gap - contents, gap_size))
1780 } /* next relocation */
1782 if (free_relocs != NULL)
1788 if (free_contents != NULL)
1790 if (! link_info->keep_memory)
1791 free (free_contents);
1792 /* Cache the section contents for elf_link_input_bfd. */
1794 elf_section_data (sec)->this_hdr.contents = contents;
1796 free_contents = NULL;
1799 if (shndx_buf != NULL)
1801 shndx_hdr->contents = NULL;
1805 if (free_intsyms != NULL)
1807 if (! link_info->keep_memory)
1808 free (free_intsyms);
1809 /* Cache the symbols for elf_link_input_bfd. */
1812 symtab_hdr->contents = NULL /* (unsigned char *) intsyms*/;
1815 free_intsyms = NULL;
1821 if (free_relocs != NULL)
1823 if (free_contents != NULL)
1824 free (free_contents);
1825 if (shndx_buf != NULL)
1827 shndx_hdr->contents = NULL;
1830 if (free_intsyms != NULL)
1831 free (free_intsyms);
1835 /* Delete some bytes from a section while relaxing. */
1838 m32c_elf_relax_delete_bytes
1844 Elf_Internal_Shdr *symtab_hdr;
1845 Elf_Internal_Shdr *shndx_hdr;
1848 Elf_Internal_Rela *irel;
1849 Elf_Internal_Rela *irelend;
1851 Elf_Internal_Sym *isym;
1852 Elf_Internal_Sym *isymend;
1853 Elf_Internal_Sym *intsyms;
1854 Elf_External_Sym_Shndx *shndx_buf;
1855 Elf_External_Sym_Shndx *shndx;
1856 struct elf_link_hash_entry ** sym_hashes;
1857 struct elf_link_hash_entry ** end_hashes;
1858 unsigned int symcount;
1860 contents = elf_section_data (sec)->this_hdr.contents;
1864 irel = elf_section_data (sec)->relocs;
1865 irelend = irel + sec->reloc_count;
1867 /* Actually delete the bytes. */
1868 memmove (contents + addr, contents + addr + count, (size_t) (toaddr - addr - count));
1871 /* Adjust all the relocs. */
1872 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel ++)
1874 /* Get the new reloc address. */
1875 if (irel->r_offset > addr && irel->r_offset < toaddr)
1876 irel->r_offset -= count;
1878 if (ELF32_R_TYPE(irel->r_info) == R_M32C_RL_JUMP
1879 && irel->r_addend == 0x10 /* one byte insn, no relocs */
1880 && irel->r_offset + 1 < addr
1881 && irel->r_offset + 7 > addr)
1884 unsigned char *insn = &contents[irel->r_offset];
1886 /* This is a JMP.S, which we have to manually update. */
1887 if (elf32_m32c_machine (abfd) == bfd_mach_m16c)
1889 if ((*insn & 0xf8) != 0x60)
1895 if ((*insn & 0xce) != 0x4a)
1897 disp = ((disp & 0x30) >> 3) | (disp & 1);
1899 if (irel->r_offset + disp + 2 >= addr+count)
1902 if (elf32_m32c_machine (abfd) == bfd_mach_m16c)
1904 *insn = (*insn & 0xf8) | disp;
1908 *insn = (*insn & 0xce) | ((disp & 6) << 3) | (disp & 1);
1914 /* Adjust the local symbols defined in this section. */
1915 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
1916 intsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
1918 isymend = isym + symtab_hdr->sh_info;
1920 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1921 shndx_hdr = & elf_tdata (abfd)->symtab_shndx_hdr;
1922 shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents;
1925 for (; isym < isymend; isym++, shndx = (shndx ? shndx + 1 : NULL))
1927 /* If the symbol is in the range of memory we just moved, we
1928 have to adjust its value. */
1929 if ((int) isym->st_shndx == sec_shndx
1930 && isym->st_value > addr
1931 && isym->st_value < toaddr)
1933 isym->st_value -= count;
1935 /* If the symbol *spans* the bytes we just deleted (i.e. it's
1936 *end* is in the moved bytes but it's *start* isn't), then we
1937 must adjust its size. */
1938 if ((int) isym->st_shndx == sec_shndx
1939 && isym->st_value < addr
1940 && isym->st_value + isym->st_size > addr
1941 && isym->st_value + isym->st_size < toaddr)
1943 isym->st_size -= count;
1947 /* Now adjust the global symbols defined in this section. */
1948 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1949 - symtab_hdr->sh_info);
1950 sym_hashes = elf_sym_hashes (abfd);
1951 // sym_hashes += symtab_hdr->sh_info;
1952 end_hashes = sym_hashes + symcount;
1954 for (; sym_hashes < end_hashes; sym_hashes ++)
1956 struct elf_link_hash_entry * sym_hash = * sym_hashes;
1959 (sym_hash->root.type == bfd_link_hash_defined
1960 || sym_hash->root.type == bfd_link_hash_defweak)
1961 && sym_hash->root.u.def.section == sec)
1963 if (sym_hash->root.u.def.value > addr
1964 && sym_hash->root.u.def.value < toaddr)
1966 sym_hash->root.u.def.value -= count;
1968 if (sym_hash->root.u.def.value < addr
1969 && sym_hash->root.u.def.value + sym_hash->size > addr
1970 && sym_hash->root.u.def.value + sym_hash->size < toaddr)
1972 sym_hash->size -= count;
1980 /* This is for versions of gcc prior to 4.3. */
1982 _bfd_m32c_elf_eh_frame_address_size (bfd *abfd, asection *sec ATTRIBUTE_UNUSED)
1984 if ((elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK) == EF_M32C_CPU_M16C)
1991 #define ELF_ARCH bfd_arch_m32c
1992 #define ELF_MACHINE_CODE EM_M32C
1993 #define ELF_MACHINE_ALT1 EM_M32C_OLD
1994 #define ELF_MAXPAGESIZE 0x100
1997 #define TARGET_BIG_SYM bfd_elf32_m32c_vec
1998 #define TARGET_BIG_NAME "elf32-m32c"
2000 #define TARGET_LITTLE_SYM bfd_elf32_m32c_vec
2001 #define TARGET_LITTLE_NAME "elf32-m32c"
2004 #define elf_info_to_howto_rel NULL
2005 #define elf_info_to_howto m32c_info_to_howto_rela
2006 #define elf_backend_object_p m32c_elf_object_p
2007 #define elf_backend_relocate_section m32c_elf_relocate_section
2008 #define elf_backend_check_relocs m32c_elf_check_relocs
2009 #define elf_backend_object_p m32c_elf_object_p
2010 #define elf_symbol_leading_char ('_')
2011 #define elf_backend_always_size_sections \
2012 m32c_elf_always_size_sections
2013 #define elf_backend_finish_dynamic_sections \
2014 m32c_elf_finish_dynamic_sections
2016 #define elf_backend_can_gc_sections 1
2017 #define elf_backend_eh_frame_address_size _bfd_m32c_elf_eh_frame_address_size
2019 #define bfd_elf32_bfd_reloc_type_lookup m32c_reloc_type_lookup
2020 #define bfd_elf32_bfd_reloc_name_lookup m32c_reloc_name_lookup
2021 #define bfd_elf32_bfd_relax_section m32c_elf_relax_section
2022 #define bfd_elf32_bfd_set_private_flags m32c_elf_set_private_flags
2023 #define bfd_elf32_bfd_merge_private_bfd_data m32c_elf_merge_private_bfd_data
2024 #define bfd_elf32_bfd_print_private_bfd_data m32c_elf_print_private_bfd_data
2026 #include "elf32-target.h"