1 /* M16C/M32C specific support for 32-bit ELF.
2 Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010
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_section_by_name (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 && elf_discarded_section (sec))
439 /* For relocs against symbols from removed linkonce sections,
440 or sections discarded by a linker script, we just want the
441 section contents zeroed. Avoid any special processing. */
442 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
448 if (info->relocatable)
450 /* This is a relocatable link. We don't have to change
451 anything, unless the reloc is against a section symbol,
452 in which case we have to adjust according to where the
453 section symbol winds up in the output section. */
454 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
455 rel->r_addend += sec->output_offset;
459 switch (ELF32_R_TYPE (rel->r_info))
466 plt_offset = &h->plt.offset;
468 plt_offset = elf_local_got_offsets (input_bfd) + r_symndx;
470 /* printf("%s: rel %x plt %d\n", h ? h->root.root.string : "(none)",
471 relocation, *plt_offset);*/
472 if (relocation <= 0xffff)
474 /* If the symbol is in range for a 16-bit address, we should
475 have deallocated the plt entry in relax_section. */
476 BFD_ASSERT (*plt_offset == (bfd_vma) -1);
480 /* If the symbol is out of range for a 16-bit address,
481 we must have allocated a plt entry. */
482 BFD_ASSERT (*plt_offset != (bfd_vma) -1);
484 /* If this is the first time we've processed this symbol,
485 fill in the plt entry with the correct symbol address. */
486 if ((*plt_offset & 1) == 0)
490 x = 0x000000fc; /* jmpf */
491 x |= (relocation << 8) & 0xffffff00;
492 bfd_put_32 (input_bfd, x, splt->contents + *plt_offset);
496 relocation = (splt->output_section->vma
497 + splt->output_offset
498 + (*plt_offset & -2));
501 char *newname = bfd_malloc (strlen(name)+5);
502 strcpy (newname, name);
503 strcat(newname, ".plt");
504 _bfd_generic_link_add_one_symbol (info,
507 BSF_FUNCTION | BSF_WEAK,
526 printf ("relocate %s at %06lx relocation %06lx addend %ld ",
527 m32c_elf_howto_table[ELF32_R_TYPE(rel->r_info)].name,
528 rel->r_offset + input_section->output_section->vma + input_section->output_offset,
529 relocation, rel->r_addend);
533 printf (" %02x", contents[rel->r_offset+i]);
537 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
538 contents, rel->r_offset, relocation,
541 if (r != bfd_reloc_ok)
543 const char * msg = (const char *) NULL;
547 case bfd_reloc_overflow:
548 r = info->callbacks->reloc_overflow
549 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
550 input_bfd, input_section, rel->r_offset);
553 case bfd_reloc_undefined:
554 r = info->callbacks->undefined_symbol
555 (info, name, input_bfd, input_section, rel->r_offset,
559 case bfd_reloc_outofrange:
560 msg = _("internal error: out of range error");
563 case bfd_reloc_notsupported:
564 msg = _("internal error: unsupported relocation error");
567 case bfd_reloc_dangerous:
568 msg = _("internal error: dangerous relocation");
572 msg = _("internal error: unknown error");
577 r = info->callbacks->warning
578 (info, msg, name, input_bfd, input_section, rel->r_offset);
588 /* We support 16-bit pointers to code above 64k by generating a thunk
589 below 64k containing a JMP instruction to the final address. */
592 m32c_elf_check_relocs
594 struct bfd_link_info * info,
596 const Elf_Internal_Rela * relocs)
598 Elf_Internal_Shdr * symtab_hdr;
599 struct elf_link_hash_entry ** sym_hashes;
600 const Elf_Internal_Rela * rel;
601 const Elf_Internal_Rela * rel_end;
602 bfd_vma *local_plt_offsets;
606 if (info->relocatable)
609 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
610 sym_hashes = elf_sym_hashes (abfd);
611 local_plt_offsets = elf_local_got_offsets (abfd);
613 dynobj = elf_hash_table(info)->dynobj;
615 rel_end = relocs + sec->reloc_count;
616 for (rel = relocs; rel < rel_end; rel++)
618 struct elf_link_hash_entry *h;
619 unsigned long r_symndx;
622 r_symndx = ELF32_R_SYM (rel->r_info);
623 if (r_symndx < symtab_hdr->sh_info)
627 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
628 while (h->root.type == bfd_link_hash_indirect
629 || h->root.type == bfd_link_hash_warning)
630 h = (struct elf_link_hash_entry *) h->root.u.i.link;
633 switch (ELF32_R_TYPE (rel->r_info))
635 /* This relocation describes a 16-bit pointer to a function.
636 We may need to allocate a thunk in low memory; reserve memory
640 elf_hash_table (info)->dynobj = dynobj = abfd;
643 splt = bfd_get_section_by_name (dynobj, ".plt");
646 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
647 | SEC_IN_MEMORY | SEC_LINKER_CREATED
648 | SEC_READONLY | SEC_CODE);
649 splt = bfd_make_section_with_flags (dynobj, ".plt", flags);
651 || ! bfd_set_section_alignment (dynobj, splt, 1))
657 offset = &h->plt.offset;
660 if (local_plt_offsets == NULL)
665 size = symtab_hdr->sh_info * sizeof (bfd_vma);
666 local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size);
667 if (local_plt_offsets == NULL)
669 elf_local_got_offsets (abfd) = local_plt_offsets;
671 for (i = 0; i < symtab_hdr->sh_info; i++)
672 local_plt_offsets[i] = (bfd_vma) -1;
674 offset = &local_plt_offsets[r_symndx];
677 if (*offset == (bfd_vma) -1)
679 *offset = splt->size;
689 /* This must exist if dynobj is ever set. */
692 m32c_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED,
693 struct bfd_link_info *info)
698 /* As an extra sanity check, verify that all plt entries have
701 if ((dynobj = elf_hash_table (info)->dynobj) != NULL
702 && (splt = bfd_get_section_by_name (dynobj, ".plt")) != NULL)
704 bfd_byte *contents = splt->contents;
705 unsigned int i, size = splt->size;
706 for (i = 0; i < size; i += 4)
708 unsigned int x = bfd_get_32 (dynobj, contents + i);
717 m32c_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
718 struct bfd_link_info *info)
723 if (info->relocatable)
726 dynobj = elf_hash_table (info)->dynobj;
730 splt = bfd_get_section_by_name (dynobj, ".plt");
731 BFD_ASSERT (splt != NULL);
733 splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size);
734 if (splt->contents == NULL)
740 /* Function to set the ELF flag bits. */
743 m32c_elf_set_private_flags (bfd *abfd, flagword flags)
745 elf_elfheader (abfd)->e_flags = flags;
746 elf_flags_init (abfd) = TRUE;
750 /* Merge backend specific data from an object file to the output
751 object file when linking. */
754 m32c_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
756 flagword old_flags, old_partial;
757 flagword new_flags, new_partial;
758 bfd_boolean error = FALSE;
762 new_opt[0] = old_opt[0] = '\0';
763 new_flags = elf_elfheader (ibfd)->e_flags;
764 old_flags = elf_elfheader (obfd)->e_flags;
767 (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
768 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
769 bfd_get_filename (ibfd));
772 if (!elf_flags_init (obfd))
774 /* First call, no flags set. */
775 elf_flags_init (obfd) = TRUE;
776 elf_elfheader (obfd)->e_flags = new_flags;
779 else if (new_flags == old_flags)
780 /* Compatible flags are ok. */
783 else /* Possibly incompatible flags. */
785 /* Warn if different cpu is used (allow a specific cpu to override
787 new_partial = (new_flags & EF_M32C_CPU_MASK);
788 old_partial = (old_flags & EF_M32C_CPU_MASK);
789 if (new_partial == old_partial)
796 default: strcat (new_opt, " -m16c"); break;
797 case EF_M32C_CPU_M16C: strcat (new_opt, " -m16c"); break;
798 case EF_M32C_CPU_M32C: strcat (new_opt, " -m32c"); break;
803 default: strcat (old_opt, " -m16c"); break;
804 case EF_M32C_CPU_M16C: strcat (old_opt, " -m16c"); break;
805 case EF_M32C_CPU_M32C: strcat (old_opt, " -m32c"); break;
809 /* Print out any mismatches from above. */
813 (*_bfd_error_handler)
814 (_("%s: compiled with %s and linked with modules compiled with %s"),
815 bfd_get_filename (ibfd), new_opt, old_opt);
818 new_flags &= ~ EF_M32C_ALL_FLAGS;
819 old_flags &= ~ EF_M32C_ALL_FLAGS;
821 /* Warn about any other mismatches. */
822 if (new_flags != old_flags)
825 (*_bfd_error_handler)
826 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
827 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
832 bfd_set_error (bfd_error_bad_value);
839 m32c_elf_print_private_bfd_data (bfd *abfd, PTR ptr)
841 FILE *file = (FILE *) ptr;
844 BFD_ASSERT (abfd != NULL && ptr != NULL);
846 /* Print normal ELF private data. */
847 _bfd_elf_print_private_bfd_data (abfd, ptr);
849 flags = elf_elfheader (abfd)->e_flags;
850 fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags);
852 switch (flags & EF_M32C_CPU_MASK)
855 case EF_M32C_CPU_M16C: fprintf (file, " -m16c"); break;
856 case EF_M32C_CPU_M32C: fprintf (file, " -m32c"); break;
863 /* Return the MACH for an e_flags value. */
866 elf32_m32c_machine (bfd *abfd)
868 switch (elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK)
870 case EF_M32C_CPU_M16C: return bfd_mach_m16c;
871 case EF_M32C_CPU_M32C: return bfd_mach_m32c;
874 return bfd_mach_m16c;
878 m32c_elf_object_p (bfd *abfd)
880 bfd_default_set_arch_mach (abfd, bfd_arch_m32c,
881 elf32_m32c_machine (abfd));
888 dump_symtab (bfd * abfd, void *internal_syms, void *external_syms)
891 Elf_Internal_Sym *isymbuf;
892 Elf_Internal_Sym *isymend;
893 Elf_Internal_Sym *isym;
894 Elf_Internal_Shdr *symtab_hdr;
895 bfd_boolean free_internal = 0, free_external = 0;
897 char * st_info_stb_str;
903 internal_syms = bfd_malloc (1000);
908 external_syms = bfd_malloc (1000);
912 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
913 locsymcount = symtab_hdr->sh_size / get_elf_backend_data(abfd)->s->sizeof_sym;
915 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
916 symtab_hdr->sh_info, 0,
917 internal_syms, external_syms, NULL);
919 isymbuf = internal_syms;
920 isymend = isymbuf + locsymcount;
922 for (isym = isymbuf ; isym < isymend ; isym++)
924 switch (ELF_ST_TYPE (isym->st_info))
926 case STT_FUNC: st_info_str = "STT_FUNC";
927 case STT_SECTION: st_info_str = "STT_SECTION";
928 case STT_FILE: st_info_str = "STT_FILE";
929 case STT_OBJECT: st_info_str = "STT_OBJECT";
930 case STT_TLS: st_info_str = "STT_TLS";
931 default: st_info_str = "";
933 switch (ELF_ST_BIND (isym->st_info))
935 case STB_LOCAL: st_info_stb_str = "STB_LOCAL";
936 case STB_GLOBAL: st_info_stb_str = "STB_GLOBAL";
937 default: st_info_stb_str = "";
939 switch (ELF_ST_VISIBILITY (isym->st_other))
941 case STV_DEFAULT: st_other_str = "STV_DEFAULT";
942 case STV_INTERNAL: st_other_str = "STV_INTERNAL";
943 case STV_PROTECTED: st_other_str = "STV_PROTECTED";
944 default: st_other_str = "";
946 switch (isym->st_shndx)
948 case SHN_ABS: st_shndx_str = "SHN_ABS";
949 case SHN_COMMON: st_shndx_str = "SHN_COMMON";
950 case SHN_UNDEF: st_shndx_str = "SHN_UNDEF";
951 default: st_shndx_str = "";
954 printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s "
955 "st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n",
957 (unsigned long) isym->st_value,
958 (unsigned long) isym->st_size,
960 bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link,
962 isym->st_info, st_info_str, st_info_stb_str,
963 isym->st_other, st_other_str,
964 isym->st_shndx, st_shndx_str);
967 free (internal_syms);
969 free (external_syms);
973 m32c_get_reloc (long reloc)
975 if (0 <= reloc && reloc < R_M32C_max)
976 return m32c_elf_howto_table[reloc].name;
982 /* Handle relaxing. */
984 /* A subroutine of m32c_elf_relax_section. If the global symbol H
985 is within the low 64k, remove any entry for it in the plt. */
987 struct relax_plt_data
994 m32c_relax_plt_check (struct elf_link_hash_entry *h,
997 struct relax_plt_data *data = (struct relax_plt_data *) xdata;
999 if (h->root.type == bfd_link_hash_warning)
1000 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1002 if (h->plt.offset != (bfd_vma) -1)
1006 if (h->root.type == bfd_link_hash_undefined
1007 || h->root.type == bfd_link_hash_undefweak)
1010 address = (h->root.u.def.section->output_section->vma
1011 + h->root.u.def.section->output_offset
1012 + h->root.u.def.value);
1014 if (address <= 0xffff)
1017 data->splt->size -= 4;
1018 *data->again = TRUE;
1025 /* A subroutine of m32c_elf_relax_section. If the global symbol H
1026 previously had a plt entry, give it a new entry offset. */
1029 m32c_relax_plt_realloc (struct elf_link_hash_entry *h,
1032 bfd_vma *entry = (bfd_vma *) xdata;
1034 if (h->root.type == bfd_link_hash_warning)
1035 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1037 if (h->plt.offset != (bfd_vma) -1)
1039 h->plt.offset = *entry;
1047 m32c_elf_relax_plt_section (bfd *dynobj,
1049 struct bfd_link_info *info,
1052 struct relax_plt_data relax_plt_data;
1055 /* Assume nothing changes. */
1058 if (info->relocatable)
1061 /* We only relax the .plt section at the moment. */
1062 if (dynobj != elf_hash_table (info)->dynobj
1063 || strcmp (splt->name, ".plt") != 0)
1066 /* Quick check for an empty plt. */
1067 if (splt->size == 0)
1070 /* Map across all global symbols; see which ones happen to
1071 fall in the low 64k. */
1072 relax_plt_data.splt = splt;
1073 relax_plt_data.again = again;
1074 elf_link_hash_traverse (elf_hash_table (info), m32c_relax_plt_check,
1077 /* Likewise for local symbols, though that's somewhat less convenient
1078 as we have to walk the list of input bfds and swap in symbol data. */
1079 for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
1081 bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
1082 Elf_Internal_Shdr *symtab_hdr;
1083 Elf_Internal_Sym *isymbuf = NULL;
1086 if (! local_plt_offsets)
1089 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1090 if (symtab_hdr->sh_info != 0)
1092 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1093 if (isymbuf == NULL)
1094 isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
1095 symtab_hdr->sh_info, 0,
1097 if (isymbuf == NULL)
1101 for (idx = 0; idx < symtab_hdr->sh_info; ++idx)
1103 Elf_Internal_Sym *isym;
1107 if (local_plt_offsets[idx] == (bfd_vma) -1)
1110 isym = &isymbuf[idx];
1111 if (isym->st_shndx == SHN_UNDEF)
1113 else if (isym->st_shndx == SHN_ABS)
1114 tsec = bfd_abs_section_ptr;
1115 else if (isym->st_shndx == SHN_COMMON)
1116 tsec = bfd_com_section_ptr;
1118 tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx);
1120 address = (tsec->output_section->vma
1121 + tsec->output_offset
1123 if (address <= 0xffff)
1125 local_plt_offsets[idx] = -1;
1132 && symtab_hdr->contents != (unsigned char *) isymbuf)
1134 if (! info->keep_memory)
1138 /* Cache the symbols for elf_link_input_bfd. */
1139 symtab_hdr->contents = (unsigned char *) isymbuf;
1144 /* If we changed anything, walk the symbols again to reallocate
1145 .plt entry addresses. */
1146 if (*again && splt->size > 0)
1150 elf_link_hash_traverse (elf_hash_table (info),
1151 m32c_relax_plt_realloc, &entry);
1153 for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
1155 bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
1156 unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info;
1159 if (! local_plt_offsets)
1162 for (idx = 0; idx < nlocals; ++idx)
1163 if (local_plt_offsets[idx] != (bfd_vma) -1)
1165 local_plt_offsets[idx] = entry;
1175 compare_reloc (const void *e1, const void *e2)
1177 const Elf_Internal_Rela *i1 = (const Elf_Internal_Rela *) e1;
1178 const Elf_Internal_Rela *i2 = (const Elf_Internal_Rela *) e2;
1180 if (i1->r_offset == i2->r_offset)
1183 return i1->r_offset < i2->r_offset ? -1 : 1;
1186 #define OFFSET_FOR_RELOC(rel) m32c_offset_for_reloc (abfd, rel, symtab_hdr, shndx_buf, intsyms)
1188 m32c_offset_for_reloc (bfd *abfd,
1189 Elf_Internal_Rela *rel,
1190 Elf_Internal_Shdr *symtab_hdr,
1191 Elf_External_Sym_Shndx *shndx_buf ATTRIBUTE_UNUSED,
1192 Elf_Internal_Sym *intsyms)
1196 /* Get the value of the symbol referred to by the reloc. */
1197 if (ELF32_R_SYM (rel->r_info) < symtab_hdr->sh_info)
1199 /* A local symbol. */
1200 Elf_Internal_Sym *isym;
1203 isym = intsyms + ELF32_R_SYM (rel->r_info);
1204 ssec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1205 symval = isym->st_value;
1207 symval += ssec->output_section->vma
1208 + ssec->output_offset;
1213 struct elf_link_hash_entry *h;
1215 /* An external symbol. */
1216 indx = ELF32_R_SYM (rel->r_info) - symtab_hdr->sh_info;
1217 h = elf_sym_hashes (abfd)[indx];
1218 BFD_ASSERT (h != NULL);
1220 if (h->root.type != bfd_link_hash_defined
1221 && h->root.type != bfd_link_hash_defweak)
1222 /* This appears to be a reference to an undefined
1223 symbol. Just ignore it--it will be caught by the
1224 regular reloc processing. */
1227 symval = (h->root.u.def.value
1228 + h->root.u.def.section->output_section->vma
1229 + h->root.u.def.section->output_offset);
1234 static int bytes_saved = 0;
1236 static int bytes_to_reloc[] = {
1244 /* What we use the bits in a relax reloc addend (R_M32C_RL_*) for. */
1246 /* Mask for the number of relocs associated with this insn. */
1247 #define RLA_RELOCS 0x0000000f
1248 /* Number of bytes gas emitted (before gas's relaxing) */
1249 #define RLA_NBYTES 0x00000ff0
1251 /* If the displacement is within the given range and the new encoding
1252 differs from the old encoding (the index), then the insn can be
1253 relaxed to the new encoding. */
1256 unsigned int max_disp;
1257 unsigned char new_encoding;
1260 static EncodingTable m16c_addr_encodings[] = {
1261 { 0, 0, 0 }, /* R0 */
1262 { 0, 0, 1 }, /* R1 */
1263 { 0, 0, 2 }, /* R2 */
1264 { 0, 0, 3 }, /* R3 */
1265 { 0, 0, 4 }, /* A0 */
1266 { 0, 0, 5 }, /* A1 */
1267 { 0, 0, 6 }, /* [A0] */
1268 { 0, 0, 7 }, /* [A1] */
1269 { 1, 0, 6 }, /* udsp:8[A0] */
1270 { 1, 0, 7 }, /* udsp:8[A1] */
1271 { 1, 0, 10 }, /* udsp:8[SB] */
1272 { 1, 0, 11 }, /* sdsp:8[FB] */
1273 { 2, 255, 8 }, /* udsp:16[A0] */
1274 { 2, 255, 9 }, /* udsp:16[A1] */
1275 { 2, 255, 10 }, /* udsp:16[SB] */
1276 { 2, 0, 15 }, /* abs:16 */
1279 static EncodingTable m16c_jmpaddr_encodings[] = {
1280 { 0, 0, 0 }, /* R0 */
1281 { 0, 0, 1 }, /* R1 */
1282 { 0, 0, 2 }, /* R2 */
1283 { 0, 0, 3 }, /* R3 */
1284 { 0, 0, 4 }, /* A0 */
1285 { 0, 0, 5 }, /* A1 */
1286 { 0, 0, 6 }, /* [A0] */
1287 { 0, 0, 7 }, /* [A1] */
1288 { 1, 0, 6 }, /* udsp:8[A0] */
1289 { 1, 0, 7 }, /* udsp:8[A1] */
1290 { 1, 0, 10 }, /* udsp:8[SB] */
1291 { 1, 0, 11 }, /* sdsp:8[FB] */
1292 { 3, 255, 8 }, /* udsp:20[A0] */
1293 { 3, 255, 9 }, /* udsp:20[A1] */
1294 { 2, 255, 10 }, /* udsp:16[SB] */
1295 { 2, 0, 15 }, /* abs:16 */
1298 static EncodingTable m32c_addr_encodings[] = {
1299 { 0, 0, 0 }, /* [A0] */
1300 { 0, 0, 1 }, /* [A1] */
1301 { 0, 0, 2 }, /* A0 */
1302 { 0, 0, 3 }, /* A1 */
1303 { 1, 0, 0 }, /* udsp:8[A0] */
1304 { 1, 0, 1 }, /* udsp:8[A1] */
1305 { 1, 0, 6 }, /* udsp:8[SB] */
1306 { 1, 0, 7 }, /* sdsp:8[FB] */
1307 { 2, 255, 4 }, /* udsp:16[A0] */
1308 { 2, 255, 5 }, /* udsp:16[A1] */
1309 { 2, 255, 6 }, /* udsp:16[SB] */
1310 { 2, 127, 7 }, /* sdsp:16[FB] */
1311 { 3, 65535, 8 }, /* udsp:24[A0] */
1312 { 3, 65535, 9 }, /* udsp:24[A1] */
1313 { 3, 65535, 15 }, /* abs24 */
1314 { 2, 0, 15 }, /* abs16 */
1315 { 0, 0, 16 }, /* R2 */
1316 { 0, 0, 17 }, /* R3 */
1317 { 0, 0, 18 }, /* R0 */
1318 { 0, 0, 19 }, /* R1 */
1334 m32c_elf_relax_section
1337 struct bfd_link_info * link_info,
1338 bfd_boolean * again)
1340 Elf_Internal_Shdr *symtab_hdr;
1341 Elf_Internal_Shdr *shndx_hdr;
1342 Elf_Internal_Rela *internal_relocs;
1343 Elf_Internal_Rela *free_relocs = NULL;
1344 Elf_Internal_Rela *irel, *irelend, *srel;
1345 bfd_byte * contents = NULL;
1346 bfd_byte * free_contents = NULL;
1347 Elf_Internal_Sym *intsyms = NULL;
1348 Elf_Internal_Sym *free_intsyms = NULL;
1349 Elf_External_Sym_Shndx *shndx_buf = NULL;
1352 if (abfd == elf_hash_table (link_info)->dynobj
1353 && strcmp (sec->name, ".plt") == 0)
1354 return m32c_elf_relax_plt_section (abfd, sec, link_info, again);
1356 /* Assume nothing changes. */
1359 machine = elf32_m32c_machine (abfd);
1361 /* We don't have to do anything for a relocatable link, if
1362 this section does not have relocs, or if this is not a
1364 if (link_info->relocatable
1365 || (sec->flags & SEC_RELOC) == 0
1366 || sec->reloc_count == 0
1367 || (sec->flags & SEC_CODE) == 0)
1370 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1371 shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
1373 /* Get the section contents. */
1374 if (elf_section_data (sec)->this_hdr.contents != NULL)
1375 contents = elf_section_data (sec)->this_hdr.contents;
1376 /* Go get them off disk. */
1377 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1380 /* Read this BFD's symbols. */
1381 /* Get cached copy if it exists. */
1382 if (symtab_hdr->contents != NULL)
1384 intsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
1388 intsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, symtab_hdr->sh_info, 0, NULL, NULL, NULL);
1389 symtab_hdr->contents = (bfd_byte *) intsyms;
1392 if (shndx_hdr->sh_size != 0)
1396 amt = symtab_hdr->sh_info;
1397 amt *= sizeof (Elf_External_Sym_Shndx);
1398 shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
1399 if (shndx_buf == NULL)
1401 if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
1402 || bfd_bread ((PTR) shndx_buf, amt, abfd) != amt)
1404 shndx_hdr->contents = (bfd_byte *) shndx_buf;
1407 /* Get a copy of the native relocations. */
1408 internal_relocs = (_bfd_elf_link_read_relocs
1409 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
1410 link_info->keep_memory));
1411 if (internal_relocs == NULL)
1413 if (! link_info->keep_memory)
1414 free_relocs = internal_relocs;
1416 /* The RL_ relocs must be just before the operand relocs they go
1417 with, so we must sort them to guarantee this. */
1418 qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
1421 /* Walk through them looking for relaxing opportunities. */
1422 irelend = internal_relocs + sec->reloc_count;
1424 for (irel = internal_relocs; irel < irelend; irel++)
1427 unsigned char *insn, *gap, *einsn;
1429 bfd_signed_vma pcrel;
1435 EncodingTable *enctbl;
1438 if (ELF32_R_TYPE(irel->r_info) != R_M32C_RL_JUMP
1439 && ELF32_R_TYPE(irel->r_info) != R_M32C_RL_1ADDR
1440 && ELF32_R_TYPE(irel->r_info) != R_M32C_RL_2ADDR)
1445 /* There will always be room for the relaxed insn, since it is smaller
1446 than the one it would replace. */
1447 BFD_ASSERT (irel->r_offset < sec->size);
1449 insn = contents + irel->r_offset;
1450 relax_relocs = irel->r_addend % 16;
1452 /* Ok, we only have three relocs we care about, and they're all
1453 fake. The lower four bits of the addend is always the number
1454 of following relocs (hence the qsort above) that are assigned
1455 to this opcode. The next 8 bits of the addend indicates the
1456 number of bytes in the insn. We use the rest of them
1457 ourselves as flags for the more expensive operations (defines
1458 above). The three relocs are:
1460 RL_JUMP: This marks all direct jump insns. We check the
1461 displacement and replace them with shorter jumps if
1462 they're in range. We also use this to find JMP.S
1463 insns and manually shorten them when we delete bytes.
1464 We have to decode these insns to figure out what to
1467 RL_1ADDR: This is a :G or :Q insn, which has a single
1468 "standard" operand. We have to extract the type
1469 field, see if it's a wide displacement, then figure
1470 out if we can replace it with a narrow displacement.
1471 We don't have to decode these insns.
1473 RL_2ADDR: Similarly, but two "standard" operands. Note that
1474 r_addend may still be 1, as standard operands don't
1475 always have displacements. Gas shouldn't give us one
1476 with zero operands, but since we don't know which one
1477 has the displacement, we check them both anyway.
1479 These all point to the beginning of the insn itself, not the
1482 Note that we only relax one step at a time, relying on the
1483 linker to call us repeatedly. Thus, there is no code for
1484 JMP.A->JMP.B although that will happen in two steps.
1485 Likewise, for 2ADDR relaxes, we do one operand per cycle.
1488 /* Get the value of the symbol referred to by the reloc. Just
1489 in case this is the last reloc in the list, use the RL's
1490 addend to choose between this reloc (no addend) or the next
1491 (yes addend, which means at least one following reloc). */
1492 srel = irel + (relax_relocs ? 1 : 0);
1493 symval = OFFSET_FOR_RELOC (srel);
1495 /* Setting gap_size nonzero is the flag which means "something
1499 new_type = ELF32_R_TYPE(srel->r_info);
1501 pc = sec->output_section->vma + sec->output_offset
1503 pcrel = symval - pc + srel->r_addend;
1505 if (machine == bfd_mach_m16c)
1509 switch (ELF32_R_TYPE(irel->r_info))
1512 case R_M32C_RL_JUMP:
1515 case 0xfe: /* jmp.b */
1516 if (pcrel >= 2 && pcrel <= 9)
1518 /* Relax JMP.B -> JMP.S. We need to get rid of
1519 the following reloc though. */
1520 insn[0] = 0x60 | (pcrel - 2);
1521 new_type = R_M32C_NONE;
1522 irel->r_addend = 0x10;
1528 case 0xf4: /* jmp.w */
1529 /* 128 is allowed because it will be one byte closer
1530 after relaxing. Likewise for all other pc-rel
1532 if (pcrel <= 128 && pcrel >= -128)
1534 /* Relax JMP.W -> JMP.B */
1537 new_type = R_M32C_8_PCREL;
1543 case 0xfc: /* jmp.a */
1544 if (pcrel <= 32768 && pcrel >= -32768)
1546 /* Relax JMP.A -> JMP.W */
1550 new_type = R_M32C_16_PCREL;
1556 case 0xfd: /* jsr.a */
1557 if (pcrel <= 32768 && pcrel >= -32768)
1559 /* Relax JSR.A -> JSR.W */
1563 new_type = R_M32C_16_PCREL;
1571 case R_M32C_RL_2ADDR:
1572 /* xxxx xxxx srce dest [src-disp] [dest-disp]*/
1574 enctbl = m16c_addr_encodings;
1576 enc = (insn[1] >> 4) & 0x0f;
1579 if (srel->r_offset == irel->r_offset + posn
1580 && e->new_encoding != enc
1581 && symval <= e->max_disp)
1584 insn[1] |= e->new_encoding << 4;
1585 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1586 gap = insn + posn + enctbl[e->new_encoding].bytes;
1587 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1590 if (relax_relocs == 2)
1596 case R_M32C_RL_1ADDR:
1597 /* xxxx xxxx xxxx dest [disp] */
1599 enctbl = m16c_addr_encodings;
1602 /* Check the opcode for jumps. We know it's safe to
1603 do this because all 2ADDR insns are at least two
1605 enc = insn[0] * 256 + insn[1];
1612 enctbl = m16c_jmpaddr_encodings;
1616 /* srel, posn, and enc must be set here. */
1618 symval = OFFSET_FOR_RELOC (srel);
1619 enc = insn[1] & 0x0f;
1622 if (srel->r_offset == irel->r_offset + posn
1623 && e->new_encoding != enc
1624 && symval <= e->max_disp)
1627 insn[1] |= e->new_encoding;
1628 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1629 gap = insn + posn + enctbl[e->new_encoding].bytes;
1630 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1636 } /* Ends switch (reloc type) for m16c. */
1638 else /* machine == bfd_mach_m32c */
1642 switch (ELF32_R_TYPE(irel->r_info))
1645 case R_M32C_RL_JUMP:
1648 case 0xbb: /* jmp.b */
1649 if (pcrel >= 2 && pcrel <= 9)
1652 /* Relax JMP.B -> JMP.S. We need to get rid of
1653 the following reloc though. */
1654 insn[0] = 0x4a | ((p << 3) & 0x30) | (p & 1);
1655 new_type = R_M32C_NONE;
1656 irel->r_addend = 0x10;
1662 case 0xce: /* jmp.w */
1663 if (pcrel <= 128 && pcrel >= -128)
1665 /* Relax JMP.W -> JMP.B */
1668 new_type = R_M32C_8_PCREL;
1674 case 0xcc: /* jmp.a */
1675 if (pcrel <= 32768 && pcrel >= -32768)
1677 /* Relax JMP.A -> JMP.W */
1681 new_type = R_M32C_16_PCREL;
1687 case 0xcd: /* jsr.a */
1688 if (pcrel <= 32768 && pcrel >= -32768)
1690 /* Relax JSR.A -> JSR.W */
1694 new_type = R_M32C_16_PCREL;
1702 case R_M32C_RL_2ADDR:
1703 /* xSSS DDDx DDSS xxxx [src-disp] [dest-disp]*/
1709 /* prefix; remove it as far as the RL reloc is concerned. */
1714 enctbl = m32c_addr_encodings;
1715 enc = ((einsn[0] & 0x70) >> 2) | ((einsn[1] & 0x30) >> 4);
1718 if (srel->r_offset == irel->r_offset + posn
1719 && e->new_encoding != enc
1720 && symval <= e->max_disp)
1723 einsn[0] |= (e->new_encoding & 0x1c) << 2;
1725 einsn[1] |= (e->new_encoding & 0x03) << 4;
1726 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1727 gap = insn + posn + enctbl[e->new_encoding].bytes;
1728 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1731 if (relax_relocs == 2)
1737 case R_M32C_RL_1ADDR:
1738 /* xxxx DDDx DDxx xxxx [disp] */
1744 /* prefix; remove it as far as the RL reloc is concerned. */
1749 enctbl = m32c_addr_encodings;
1752 /* srel, posn, and enc must be set here. */
1754 symval = OFFSET_FOR_RELOC (srel);
1755 enc = ((einsn[0] & 0x0e) << 1) | ((einsn[1] & 0xc0) >> 6);
1758 if (srel->r_offset == irel->r_offset + posn
1759 && e->new_encoding != enc
1760 && symval <= e->max_disp)
1763 einsn[0] |= (e->new_encoding & 0x1c) >> 1;
1765 einsn[1] |= (e->new_encoding & 0x03) << 6;
1766 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1767 gap = insn + posn + enctbl[e->new_encoding].bytes;
1768 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1774 } /* Ends switch (reloc type) for m32c. */
1782 srel->r_info = ELF32_R_INFO (ELF32_R_SYM (srel->r_info), new_type);
1784 /* Note that we've changed the relocs, section contents, etc. */
1785 elf_section_data (sec)->relocs = internal_relocs;
1788 elf_section_data (sec)->this_hdr.contents = contents;
1789 free_contents = NULL;
1791 symtab_hdr->contents = (bfd_byte *) intsyms;
1792 free_intsyms = NULL;
1794 bytes_saved += gap_size;
1796 if (! m32c_elf_relax_delete_bytes(abfd, sec, gap - contents, gap_size))
1799 } /* next relocation */
1801 if (free_relocs != NULL)
1807 if (free_contents != NULL)
1809 if (! link_info->keep_memory)
1810 free (free_contents);
1811 /* Cache the section contents for elf_link_input_bfd. */
1813 elf_section_data (sec)->this_hdr.contents = contents;
1815 free_contents = NULL;
1818 if (shndx_buf != NULL)
1820 shndx_hdr->contents = NULL;
1824 if (free_intsyms != NULL)
1826 if (! link_info->keep_memory)
1827 free (free_intsyms);
1828 /* Cache the symbols for elf_link_input_bfd. */
1831 symtab_hdr->contents = NULL /* (unsigned char *) intsyms*/;
1834 free_intsyms = NULL;
1840 if (free_relocs != NULL)
1842 if (free_contents != NULL)
1843 free (free_contents);
1844 if (shndx_buf != NULL)
1846 shndx_hdr->contents = NULL;
1849 if (free_intsyms != NULL)
1850 free (free_intsyms);
1854 /* Delete some bytes from a section while relaxing. */
1857 m32c_elf_relax_delete_bytes
1863 Elf_Internal_Shdr *symtab_hdr;
1864 Elf_Internal_Shdr *shndx_hdr;
1867 Elf_Internal_Rela *irel;
1868 Elf_Internal_Rela *irelend;
1870 Elf_Internal_Sym *isym;
1871 Elf_Internal_Sym *isymend;
1872 Elf_Internal_Sym *intsyms;
1873 Elf_External_Sym_Shndx *shndx_buf;
1874 Elf_External_Sym_Shndx *shndx;
1875 struct elf_link_hash_entry ** sym_hashes;
1876 struct elf_link_hash_entry ** end_hashes;
1877 unsigned int symcount;
1879 contents = elf_section_data (sec)->this_hdr.contents;
1883 irel = elf_section_data (sec)->relocs;
1884 irelend = irel + sec->reloc_count;
1886 /* Actually delete the bytes. */
1887 memmove (contents + addr, contents + addr + count, (size_t) (toaddr - addr - count));
1890 /* Adjust all the relocs. */
1891 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel ++)
1893 /* Get the new reloc address. */
1894 if (irel->r_offset > addr && irel->r_offset < toaddr)
1895 irel->r_offset -= count;
1897 if (ELF32_R_TYPE(irel->r_info) == R_M32C_RL_JUMP
1898 && irel->r_addend == 0x10 /* one byte insn, no relocs */
1899 && irel->r_offset + 1 < addr
1900 && irel->r_offset + 7 > addr)
1903 unsigned char *insn = &contents[irel->r_offset];
1905 /* This is a JMP.S, which we have to manually update. */
1906 if (elf32_m32c_machine (abfd) == bfd_mach_m16c)
1908 if ((*insn & 0xf8) != 0x60)
1914 if ((*insn & 0xce) != 0x4a)
1916 disp = ((disp & 0x30) >> 3) | (disp & 1);
1918 if (irel->r_offset + disp + 2 >= addr+count)
1921 if (elf32_m32c_machine (abfd) == bfd_mach_m16c)
1923 *insn = (*insn & 0xf8) | disp;
1927 *insn = (*insn & 0xce) | ((disp & 6) << 3) | (disp & 1);
1933 /* Adjust the local symbols defined in this section. */
1934 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
1935 intsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
1937 isymend = isym + symtab_hdr->sh_info;
1939 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1940 shndx_hdr = & elf_tdata (abfd)->symtab_shndx_hdr;
1941 shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents;
1944 for (; isym < isymend; isym++, shndx = (shndx ? shndx + 1 : NULL))
1946 /* If the symbol is in the range of memory we just moved, we
1947 have to adjust its value. */
1948 if ((int) isym->st_shndx == sec_shndx
1949 && isym->st_value > addr
1950 && isym->st_value < toaddr)
1952 isym->st_value -= count;
1954 /* If the symbol *spans* the bytes we just deleted (i.e. it's
1955 *end* is in the moved bytes but it's *start* isn't), then we
1956 must adjust its size. */
1957 if ((int) isym->st_shndx == sec_shndx
1958 && isym->st_value < addr
1959 && isym->st_value + isym->st_size > addr
1960 && isym->st_value + isym->st_size < toaddr)
1962 isym->st_size -= count;
1966 /* Now adjust the global symbols defined in this section. */
1967 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1968 - symtab_hdr->sh_info);
1969 sym_hashes = elf_sym_hashes (abfd);
1970 // sym_hashes += symtab_hdr->sh_info;
1971 end_hashes = sym_hashes + symcount;
1973 for (; sym_hashes < end_hashes; sym_hashes ++)
1975 struct elf_link_hash_entry * sym_hash = * sym_hashes;
1978 (sym_hash->root.type == bfd_link_hash_defined
1979 || sym_hash->root.type == bfd_link_hash_defweak)
1980 && sym_hash->root.u.def.section == sec)
1982 if (sym_hash->root.u.def.value > addr
1983 && sym_hash->root.u.def.value < toaddr)
1985 sym_hash->root.u.def.value -= count;
1987 if (sym_hash->root.u.def.value < addr
1988 && sym_hash->root.u.def.value + sym_hash->size > addr
1989 && sym_hash->root.u.def.value + sym_hash->size < toaddr)
1991 sym_hash->size -= count;
1999 /* This is for versions of gcc prior to 4.3. */
2001 _bfd_m32c_elf_eh_frame_address_size (bfd *abfd, asection *sec ATTRIBUTE_UNUSED)
2003 if ((elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK) == EF_M32C_CPU_M16C)
2010 #define ELF_ARCH bfd_arch_m32c
2011 #define ELF_MACHINE_CODE EM_M32C
2012 #define ELF_MACHINE_ALT1 EM_M32C_OLD
2013 #define ELF_MAXPAGESIZE 0x100
2016 #define TARGET_BIG_SYM bfd_elf32_m32c_vec
2017 #define TARGET_BIG_NAME "elf32-m32c"
2019 #define TARGET_LITTLE_SYM bfd_elf32_m32c_vec
2020 #define TARGET_LITTLE_NAME "elf32-m32c"
2023 #define elf_info_to_howto_rel NULL
2024 #define elf_info_to_howto m32c_info_to_howto_rela
2025 #define elf_backend_object_p m32c_elf_object_p
2026 #define elf_backend_relocate_section m32c_elf_relocate_section
2027 #define elf_backend_check_relocs m32c_elf_check_relocs
2028 #define elf_backend_object_p m32c_elf_object_p
2029 #define elf_symbol_leading_char ('_')
2030 #define elf_backend_always_size_sections \
2031 m32c_elf_always_size_sections
2032 #define elf_backend_finish_dynamic_sections \
2033 m32c_elf_finish_dynamic_sections
2035 #define elf_backend_can_gc_sections 1
2036 #define elf_backend_eh_frame_address_size _bfd_m32c_elf_eh_frame_address_size
2038 #define bfd_elf32_bfd_reloc_type_lookup m32c_reloc_type_lookup
2039 #define bfd_elf32_bfd_reloc_name_lookup m32c_reloc_name_lookup
2040 #define bfd_elf32_bfd_relax_section m32c_elf_relax_section
2041 #define bfd_elf32_bfd_set_private_flags m32c_elf_set_private_flags
2042 #define bfd_elf32_bfd_merge_private_bfd_data m32c_elf_merge_private_bfd_data
2043 #define bfd_elf32_bfd_print_private_bfd_data m32c_elf_print_private_bfd_data
2045 #include "elf32-target.h"