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;
625 /* PR15323, ref flags aren't set for references in the same
627 h->root.non_ir_ref = 1;
630 switch (ELF32_R_TYPE (rel->r_info))
632 /* This relocation describes a 16-bit pointer to a function.
633 We may need to allocate a thunk in low memory; reserve memory
637 elf_hash_table (info)->dynobj = dynobj = abfd;
640 splt = bfd_get_linker_section (dynobj, ".plt");
643 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
644 | SEC_IN_MEMORY | SEC_LINKER_CREATED
645 | SEC_READONLY | SEC_CODE);
646 splt = bfd_make_section_anyway_with_flags (dynobj, ".plt",
649 || ! bfd_set_section_alignment (dynobj, splt, 1))
655 offset = &h->plt.offset;
658 if (local_plt_offsets == NULL)
663 size = symtab_hdr->sh_info * sizeof (bfd_vma);
664 local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size);
665 if (local_plt_offsets == NULL)
667 elf_local_got_offsets (abfd) = local_plt_offsets;
669 for (i = 0; i < symtab_hdr->sh_info; i++)
670 local_plt_offsets[i] = (bfd_vma) -1;
672 offset = &local_plt_offsets[r_symndx];
675 if (*offset == (bfd_vma) -1)
677 *offset = splt->size;
687 /* This must exist if dynobj is ever set. */
690 m32c_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED,
691 struct bfd_link_info *info)
696 /* As an extra sanity check, verify that all plt entries have
699 if ((dynobj = elf_hash_table (info)->dynobj) != NULL
700 && (splt = bfd_get_linker_section (dynobj, ".plt")) != NULL)
702 bfd_byte *contents = splt->contents;
703 unsigned int i, size = splt->size;
704 for (i = 0; i < size; i += 4)
706 unsigned int x = bfd_get_32 (dynobj, contents + i);
715 m32c_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
716 struct bfd_link_info *info)
721 if (info->relocatable)
724 dynobj = elf_hash_table (info)->dynobj;
728 splt = bfd_get_linker_section (dynobj, ".plt");
729 BFD_ASSERT (splt != NULL);
731 splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size);
732 if (splt->contents == NULL)
738 /* Function to set the ELF flag bits. */
741 m32c_elf_set_private_flags (bfd *abfd, flagword flags)
743 elf_elfheader (abfd)->e_flags = flags;
744 elf_flags_init (abfd) = TRUE;
748 /* Merge backend specific data from an object file to the output
749 object file when linking. */
752 m32c_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
754 flagword old_flags, old_partial;
755 flagword new_flags, new_partial;
756 bfd_boolean error = FALSE;
760 new_opt[0] = old_opt[0] = '\0';
761 new_flags = elf_elfheader (ibfd)->e_flags;
762 old_flags = elf_elfheader (obfd)->e_flags;
765 (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
766 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
767 bfd_get_filename (ibfd));
770 if (!elf_flags_init (obfd))
772 /* First call, no flags set. */
773 elf_flags_init (obfd) = TRUE;
774 elf_elfheader (obfd)->e_flags = new_flags;
777 else if (new_flags == old_flags)
778 /* Compatible flags are ok. */
781 else /* Possibly incompatible flags. */
783 /* Warn if different cpu is used (allow a specific cpu to override
785 new_partial = (new_flags & EF_M32C_CPU_MASK);
786 old_partial = (old_flags & EF_M32C_CPU_MASK);
787 if (new_partial == old_partial)
794 default: strcat (new_opt, " -m16c"); break;
795 case EF_M32C_CPU_M16C: strcat (new_opt, " -m16c"); break;
796 case EF_M32C_CPU_M32C: strcat (new_opt, " -m32c"); break;
801 default: strcat (old_opt, " -m16c"); break;
802 case EF_M32C_CPU_M16C: strcat (old_opt, " -m16c"); break;
803 case EF_M32C_CPU_M32C: strcat (old_opt, " -m32c"); break;
807 /* Print out any mismatches from above. */
811 (*_bfd_error_handler)
812 (_("%s: compiled with %s and linked with modules compiled with %s"),
813 bfd_get_filename (ibfd), new_opt, old_opt);
816 new_flags &= ~ EF_M32C_ALL_FLAGS;
817 old_flags &= ~ EF_M32C_ALL_FLAGS;
819 /* Warn about any other mismatches. */
820 if (new_flags != old_flags)
823 (*_bfd_error_handler)
824 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
825 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
830 bfd_set_error (bfd_error_bad_value);
837 m32c_elf_print_private_bfd_data (bfd *abfd, void *ptr)
839 FILE *file = (FILE *) ptr;
842 BFD_ASSERT (abfd != NULL && ptr != NULL);
844 /* Print normal ELF private data. */
845 _bfd_elf_print_private_bfd_data (abfd, ptr);
847 flags = elf_elfheader (abfd)->e_flags;
848 fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags);
850 switch (flags & EF_M32C_CPU_MASK)
853 case EF_M32C_CPU_M16C: fprintf (file, " -m16c"); break;
854 case EF_M32C_CPU_M32C: fprintf (file, " -m32c"); break;
861 /* Return the MACH for an e_flags value. */
864 elf32_m32c_machine (bfd *abfd)
866 switch (elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK)
868 case EF_M32C_CPU_M16C: return bfd_mach_m16c;
869 case EF_M32C_CPU_M32C: return bfd_mach_m32c;
872 return bfd_mach_m16c;
876 m32c_elf_object_p (bfd *abfd)
878 bfd_default_set_arch_mach (abfd, bfd_arch_m32c,
879 elf32_m32c_machine (abfd));
886 dump_symtab (bfd * abfd, void *internal_syms, void *external_syms)
889 Elf_Internal_Sym *isymbuf;
890 Elf_Internal_Sym *isymend;
891 Elf_Internal_Sym *isym;
892 Elf_Internal_Shdr *symtab_hdr;
893 bfd_boolean free_internal = 0, free_external = 0;
895 char * st_info_stb_str;
901 internal_syms = bfd_malloc (1000);
906 external_syms = bfd_malloc (1000);
910 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
911 locsymcount = symtab_hdr->sh_size / get_elf_backend_data(abfd)->s->sizeof_sym;
913 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
914 symtab_hdr->sh_info, 0,
915 internal_syms, external_syms, NULL);
917 isymbuf = internal_syms;
918 isymend = isymbuf + locsymcount;
920 for (isym = isymbuf ; isym < isymend ; isym++)
922 switch (ELF_ST_TYPE (isym->st_info))
924 case STT_FUNC: st_info_str = "STT_FUNC";
925 case STT_SECTION: st_info_str = "STT_SECTION";
926 case STT_FILE: st_info_str = "STT_FILE";
927 case STT_OBJECT: st_info_str = "STT_OBJECT";
928 case STT_TLS: st_info_str = "STT_TLS";
929 default: st_info_str = "";
931 switch (ELF_ST_BIND (isym->st_info))
933 case STB_LOCAL: st_info_stb_str = "STB_LOCAL";
934 case STB_GLOBAL: st_info_stb_str = "STB_GLOBAL";
935 default: st_info_stb_str = "";
937 switch (ELF_ST_VISIBILITY (isym->st_other))
939 case STV_DEFAULT: st_other_str = "STV_DEFAULT";
940 case STV_INTERNAL: st_other_str = "STV_INTERNAL";
941 case STV_PROTECTED: st_other_str = "STV_PROTECTED";
942 default: st_other_str = "";
944 switch (isym->st_shndx)
946 case SHN_ABS: st_shndx_str = "SHN_ABS";
947 case SHN_COMMON: st_shndx_str = "SHN_COMMON";
948 case SHN_UNDEF: st_shndx_str = "SHN_UNDEF";
949 default: st_shndx_str = "";
952 printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s "
953 "st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n",
955 (unsigned long) isym->st_value,
956 (unsigned long) isym->st_size,
958 bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link,
960 isym->st_info, st_info_str, st_info_stb_str,
961 isym->st_other, st_other_str,
962 isym->st_shndx, st_shndx_str);
965 free (internal_syms);
967 free (external_syms);
971 m32c_get_reloc (long reloc)
973 if (0 <= reloc && reloc < R_M32C_max)
974 return m32c_elf_howto_table[reloc].name;
980 /* Handle relaxing. */
982 /* A subroutine of m32c_elf_relax_section. If the global symbol H
983 is within the low 64k, remove any entry for it in the plt. */
985 struct relax_plt_data
992 m32c_relax_plt_check (struct elf_link_hash_entry *h, void * xdata)
994 struct relax_plt_data *data = (struct relax_plt_data *) xdata;
996 if (h->plt.offset != (bfd_vma) -1)
1000 if (h->root.type == bfd_link_hash_undefined
1001 || h->root.type == bfd_link_hash_undefweak)
1004 address = (h->root.u.def.section->output_section->vma
1005 + h->root.u.def.section->output_offset
1006 + h->root.u.def.value);
1008 if (address <= 0xffff)
1011 data->splt->size -= 4;
1012 *data->again = TRUE;
1019 /* A subroutine of m32c_elf_relax_section. If the global symbol H
1020 previously had a plt entry, give it a new entry offset. */
1023 m32c_relax_plt_realloc (struct elf_link_hash_entry *h, void * xdata)
1025 bfd_vma *entry = (bfd_vma *) xdata;
1027 if (h->plt.offset != (bfd_vma) -1)
1029 h->plt.offset = *entry;
1037 m32c_elf_relax_plt_section (asection *splt,
1038 struct bfd_link_info *info,
1041 struct relax_plt_data relax_plt_data;
1044 /* Assume nothing changes. */
1047 if (info->relocatable)
1050 /* Quick check for an empty plt. */
1051 if (splt->size == 0)
1054 /* Map across all global symbols; see which ones happen to
1055 fall in the low 64k. */
1056 relax_plt_data.splt = splt;
1057 relax_plt_data.again = again;
1058 elf_link_hash_traverse (elf_hash_table (info), m32c_relax_plt_check,
1061 /* Likewise for local symbols, though that's somewhat less convenient
1062 as we have to walk the list of input bfds and swap in symbol data. */
1063 for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
1065 bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
1066 Elf_Internal_Shdr *symtab_hdr;
1067 Elf_Internal_Sym *isymbuf = NULL;
1070 if (! local_plt_offsets)
1073 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1074 if (symtab_hdr->sh_info != 0)
1076 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1077 if (isymbuf == NULL)
1078 isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
1079 symtab_hdr->sh_info, 0,
1081 if (isymbuf == NULL)
1085 for (idx = 0; idx < symtab_hdr->sh_info; ++idx)
1087 Elf_Internal_Sym *isym;
1091 if (local_plt_offsets[idx] == (bfd_vma) -1)
1094 isym = &isymbuf[idx];
1095 if (isym->st_shndx == SHN_UNDEF)
1097 else if (isym->st_shndx == SHN_ABS)
1098 tsec = bfd_abs_section_ptr;
1099 else if (isym->st_shndx == SHN_COMMON)
1100 tsec = bfd_com_section_ptr;
1102 tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx);
1104 address = (tsec->output_section->vma
1105 + tsec->output_offset
1107 if (address <= 0xffff)
1109 local_plt_offsets[idx] = -1;
1116 && symtab_hdr->contents != (unsigned char *) isymbuf)
1118 if (! info->keep_memory)
1122 /* Cache the symbols for elf_link_input_bfd. */
1123 symtab_hdr->contents = (unsigned char *) isymbuf;
1128 /* If we changed anything, walk the symbols again to reallocate
1129 .plt entry addresses. */
1130 if (*again && splt->size > 0)
1134 elf_link_hash_traverse (elf_hash_table (info),
1135 m32c_relax_plt_realloc, &entry);
1137 for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
1139 bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
1140 unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info;
1143 if (! local_plt_offsets)
1146 for (idx = 0; idx < nlocals; ++idx)
1147 if (local_plt_offsets[idx] != (bfd_vma) -1)
1149 local_plt_offsets[idx] = entry;
1159 compare_reloc (const void *e1, const void *e2)
1161 const Elf_Internal_Rela *i1 = (const Elf_Internal_Rela *) e1;
1162 const Elf_Internal_Rela *i2 = (const Elf_Internal_Rela *) e2;
1164 if (i1->r_offset == i2->r_offset)
1167 return i1->r_offset < i2->r_offset ? -1 : 1;
1170 #define OFFSET_FOR_RELOC(rel) m32c_offset_for_reloc (abfd, rel, symtab_hdr, shndx_buf, intsyms)
1172 m32c_offset_for_reloc (bfd *abfd,
1173 Elf_Internal_Rela *rel,
1174 Elf_Internal_Shdr *symtab_hdr,
1175 Elf_External_Sym_Shndx *shndx_buf ATTRIBUTE_UNUSED,
1176 Elf_Internal_Sym *intsyms)
1180 /* Get the value of the symbol referred to by the reloc. */
1181 if (ELF32_R_SYM (rel->r_info) < symtab_hdr->sh_info)
1183 /* A local symbol. */
1184 Elf_Internal_Sym *isym;
1187 isym = intsyms + ELF32_R_SYM (rel->r_info);
1188 ssec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1189 symval = isym->st_value;
1191 symval += ssec->output_section->vma
1192 + ssec->output_offset;
1197 struct elf_link_hash_entry *h;
1199 /* An external symbol. */
1200 indx = ELF32_R_SYM (rel->r_info) - symtab_hdr->sh_info;
1201 h = elf_sym_hashes (abfd)[indx];
1202 BFD_ASSERT (h != NULL);
1204 if (h->root.type != bfd_link_hash_defined
1205 && h->root.type != bfd_link_hash_defweak)
1206 /* This appears to be a reference to an undefined
1207 symbol. Just ignore it--it will be caught by the
1208 regular reloc processing. */
1211 symval = (h->root.u.def.value
1212 + h->root.u.def.section->output_section->vma
1213 + h->root.u.def.section->output_offset);
1218 static int bytes_saved = 0;
1220 static int bytes_to_reloc[] = {
1228 /* What we use the bits in a relax reloc addend (R_M32C_RL_*) for. */
1230 /* Mask for the number of relocs associated with this insn. */
1231 #define RLA_RELOCS 0x0000000f
1232 /* Number of bytes gas emitted (before gas's relaxing) */
1233 #define RLA_NBYTES 0x00000ff0
1235 /* If the displacement is within the given range and the new encoding
1236 differs from the old encoding (the index), then the insn can be
1237 relaxed to the new encoding. */
1240 unsigned int max_disp;
1241 unsigned char new_encoding;
1244 static EncodingTable m16c_addr_encodings[] = {
1245 { 0, 0, 0 }, /* R0 */
1246 { 0, 0, 1 }, /* R1 */
1247 { 0, 0, 2 }, /* R2 */
1248 { 0, 0, 3 }, /* R3 */
1249 { 0, 0, 4 }, /* A0 */
1250 { 0, 0, 5 }, /* A1 */
1251 { 0, 0, 6 }, /* [A0] */
1252 { 0, 0, 7 }, /* [A1] */
1253 { 1, 0, 6 }, /* udsp:8[A0] */
1254 { 1, 0, 7 }, /* udsp:8[A1] */
1255 { 1, 0, 10 }, /* udsp:8[SB] */
1256 { 1, 0, 11 }, /* sdsp:8[FB] */
1257 { 2, 255, 8 }, /* udsp:16[A0] */
1258 { 2, 255, 9 }, /* udsp:16[A1] */
1259 { 2, 255, 10 }, /* udsp:16[SB] */
1260 { 2, 0, 15 }, /* abs:16 */
1263 static EncodingTable m16c_jmpaddr_encodings[] = {
1264 { 0, 0, 0 }, /* R0 */
1265 { 0, 0, 1 }, /* R1 */
1266 { 0, 0, 2 }, /* R2 */
1267 { 0, 0, 3 }, /* R3 */
1268 { 0, 0, 4 }, /* A0 */
1269 { 0, 0, 5 }, /* A1 */
1270 { 0, 0, 6 }, /* [A0] */
1271 { 0, 0, 7 }, /* [A1] */
1272 { 1, 0, 6 }, /* udsp:8[A0] */
1273 { 1, 0, 7 }, /* udsp:8[A1] */
1274 { 1, 0, 10 }, /* udsp:8[SB] */
1275 { 1, 0, 11 }, /* sdsp:8[FB] */
1276 { 3, 255, 8 }, /* udsp:20[A0] */
1277 { 3, 255, 9 }, /* udsp:20[A1] */
1278 { 2, 255, 10 }, /* udsp:16[SB] */
1279 { 2, 0, 15 }, /* abs:16 */
1282 static EncodingTable m32c_addr_encodings[] = {
1283 { 0, 0, 0 }, /* [A0] */
1284 { 0, 0, 1 }, /* [A1] */
1285 { 0, 0, 2 }, /* A0 */
1286 { 0, 0, 3 }, /* A1 */
1287 { 1, 0, 0 }, /* udsp:8[A0] */
1288 { 1, 0, 1 }, /* udsp:8[A1] */
1289 { 1, 0, 6 }, /* udsp:8[SB] */
1290 { 1, 0, 7 }, /* sdsp:8[FB] */
1291 { 2, 255, 4 }, /* udsp:16[A0] */
1292 { 2, 255, 5 }, /* udsp:16[A1] */
1293 { 2, 255, 6 }, /* udsp:16[SB] */
1294 { 2, 127, 7 }, /* sdsp:16[FB] */
1295 { 3, 65535, 8 }, /* udsp:24[A0] */
1296 { 3, 65535, 9 }, /* udsp:24[A1] */
1297 { 3, 65535, 15 }, /* abs24 */
1298 { 2, 0, 15 }, /* abs16 */
1299 { 0, 0, 16 }, /* R2 */
1300 { 0, 0, 17 }, /* R3 */
1301 { 0, 0, 18 }, /* R0 */
1302 { 0, 0, 19 }, /* R1 */
1318 m32c_elf_relax_section
1321 struct bfd_link_info * link_info,
1322 bfd_boolean * again)
1324 Elf_Internal_Shdr *symtab_hdr;
1325 Elf_Internal_Shdr *shndx_hdr;
1326 Elf_Internal_Rela *internal_relocs;
1327 Elf_Internal_Rela *free_relocs = NULL;
1328 Elf_Internal_Rela *irel, *irelend, *srel;
1329 bfd_byte * contents = NULL;
1330 bfd_byte * free_contents = NULL;
1331 Elf_Internal_Sym *intsyms = NULL;
1332 Elf_Internal_Sym *free_intsyms = NULL;
1333 Elf_External_Sym_Shndx *shndx_buf = NULL;
1336 if (abfd == elf_hash_table (link_info)->dynobj
1337 && (sec->flags & SEC_LINKER_CREATED) != 0
1338 && strcmp (sec->name, ".plt") == 0)
1339 return m32c_elf_relax_plt_section (sec, link_info, again);
1341 /* Assume nothing changes. */
1344 machine = elf32_m32c_machine (abfd);
1346 /* We don't have to do anything for a relocatable link, if
1347 this section does not have relocs, or if this is not a
1349 if (link_info->relocatable
1350 || (sec->flags & SEC_RELOC) == 0
1351 || sec->reloc_count == 0
1352 || (sec->flags & SEC_CODE) == 0)
1355 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1356 shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
1358 /* Get the section contents. */
1359 if (elf_section_data (sec)->this_hdr.contents != NULL)
1360 contents = elf_section_data (sec)->this_hdr.contents;
1361 /* Go get them off disk. */
1362 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1365 /* Read this BFD's symbols. */
1366 /* Get cached copy if it exists. */
1367 if (symtab_hdr->contents != NULL)
1369 intsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
1373 intsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, symtab_hdr->sh_info, 0, NULL, NULL, NULL);
1374 symtab_hdr->contents = (bfd_byte *) intsyms;
1377 if (shndx_hdr->sh_size != 0)
1381 amt = symtab_hdr->sh_info;
1382 amt *= sizeof (Elf_External_Sym_Shndx);
1383 shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
1384 if (shndx_buf == NULL)
1386 if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
1387 || bfd_bread (shndx_buf, amt, abfd) != amt)
1389 shndx_hdr->contents = (bfd_byte *) shndx_buf;
1392 /* Get a copy of the native relocations. */
1393 internal_relocs = (_bfd_elf_link_read_relocs
1394 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
1395 link_info->keep_memory));
1396 if (internal_relocs == NULL)
1398 if (! link_info->keep_memory)
1399 free_relocs = internal_relocs;
1401 /* The RL_ relocs must be just before the operand relocs they go
1402 with, so we must sort them to guarantee this. */
1403 qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
1406 /* Walk through them looking for relaxing opportunities. */
1407 irelend = internal_relocs + sec->reloc_count;
1409 for (irel = internal_relocs; irel < irelend; irel++)
1412 unsigned char *insn, *gap, *einsn;
1414 bfd_signed_vma pcrel;
1420 EncodingTable *enctbl;
1423 if (ELF32_R_TYPE(irel->r_info) != R_M32C_RL_JUMP
1424 && ELF32_R_TYPE(irel->r_info) != R_M32C_RL_1ADDR
1425 && ELF32_R_TYPE(irel->r_info) != R_M32C_RL_2ADDR)
1430 /* There will always be room for the relaxed insn, since it is smaller
1431 than the one it would replace. */
1432 BFD_ASSERT (irel->r_offset < sec->size);
1434 insn = contents + irel->r_offset;
1435 relax_relocs = irel->r_addend % 16;
1437 /* Ok, we only have three relocs we care about, and they're all
1438 fake. The lower four bits of the addend is always the number
1439 of following relocs (hence the qsort above) that are assigned
1440 to this opcode. The next 8 bits of the addend indicates the
1441 number of bytes in the insn. We use the rest of them
1442 ourselves as flags for the more expensive operations (defines
1443 above). The three relocs are:
1445 RL_JUMP: This marks all direct jump insns. We check the
1446 displacement and replace them with shorter jumps if
1447 they're in range. We also use this to find JMP.S
1448 insns and manually shorten them when we delete bytes.
1449 We have to decode these insns to figure out what to
1452 RL_1ADDR: This is a :G or :Q insn, which has a single
1453 "standard" operand. We have to extract the type
1454 field, see if it's a wide displacement, then figure
1455 out if we can replace it with a narrow displacement.
1456 We don't have to decode these insns.
1458 RL_2ADDR: Similarly, but two "standard" operands. Note that
1459 r_addend may still be 1, as standard operands don't
1460 always have displacements. Gas shouldn't give us one
1461 with zero operands, but since we don't know which one
1462 has the displacement, we check them both anyway.
1464 These all point to the beginning of the insn itself, not the
1467 Note that we only relax one step at a time, relying on the
1468 linker to call us repeatedly. Thus, there is no code for
1469 JMP.A->JMP.B although that will happen in two steps.
1470 Likewise, for 2ADDR relaxes, we do one operand per cycle.
1473 /* Get the value of the symbol referred to by the reloc. Just
1474 in case this is the last reloc in the list, use the RL's
1475 addend to choose between this reloc (no addend) or the next
1476 (yes addend, which means at least one following reloc). */
1477 srel = irel + (relax_relocs ? 1 : 0);
1478 symval = OFFSET_FOR_RELOC (srel);
1480 /* Setting gap_size nonzero is the flag which means "something
1484 new_type = ELF32_R_TYPE(srel->r_info);
1486 pc = sec->output_section->vma + sec->output_offset
1488 pcrel = symval - pc + srel->r_addend;
1490 if (machine == bfd_mach_m16c)
1494 switch (ELF32_R_TYPE(irel->r_info))
1497 case R_M32C_RL_JUMP:
1500 case 0xfe: /* jmp.b */
1501 if (pcrel >= 2 && pcrel <= 9)
1503 /* Relax JMP.B -> JMP.S. We need to get rid of
1504 the following reloc though. */
1505 insn[0] = 0x60 | (pcrel - 2);
1506 new_type = R_M32C_NONE;
1507 irel->r_addend = 0x10;
1513 case 0xf4: /* jmp.w */
1514 /* 128 is allowed because it will be one byte closer
1515 after relaxing. Likewise for all other pc-rel
1517 if (pcrel <= 128 && pcrel >= -128)
1519 /* Relax JMP.W -> JMP.B */
1522 new_type = R_M32C_8_PCREL;
1528 case 0xfc: /* jmp.a */
1529 if (pcrel <= 32768 && pcrel >= -32768)
1531 /* Relax JMP.A -> JMP.W */
1535 new_type = R_M32C_16_PCREL;
1541 case 0xfd: /* jsr.a */
1542 if (pcrel <= 32768 && pcrel >= -32768)
1544 /* Relax JSR.A -> JSR.W */
1548 new_type = R_M32C_16_PCREL;
1556 case R_M32C_RL_2ADDR:
1557 /* xxxx xxxx srce dest [src-disp] [dest-disp]*/
1559 enctbl = m16c_addr_encodings;
1561 enc = (insn[1] >> 4) & 0x0f;
1564 if (srel->r_offset == irel->r_offset + posn
1565 && e->new_encoding != enc
1566 && symval <= e->max_disp)
1569 insn[1] |= e->new_encoding << 4;
1570 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1571 gap = insn + posn + enctbl[e->new_encoding].bytes;
1572 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1575 if (relax_relocs == 2)
1581 case R_M32C_RL_1ADDR:
1582 /* xxxx xxxx xxxx dest [disp] */
1584 enctbl = m16c_addr_encodings;
1587 /* Check the opcode for jumps. We know it's safe to
1588 do this because all 2ADDR insns are at least two
1590 enc = insn[0] * 256 + insn[1];
1597 enctbl = m16c_jmpaddr_encodings;
1601 /* srel, posn, and enc must be set here. */
1603 symval = OFFSET_FOR_RELOC (srel);
1604 enc = insn[1] & 0x0f;
1607 if (srel->r_offset == irel->r_offset + posn
1608 && e->new_encoding != enc
1609 && symval <= e->max_disp)
1612 insn[1] |= e->new_encoding;
1613 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1614 gap = insn + posn + enctbl[e->new_encoding].bytes;
1615 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1621 } /* Ends switch (reloc type) for m16c. */
1623 else /* machine == bfd_mach_m32c */
1627 switch (ELF32_R_TYPE(irel->r_info))
1630 case R_M32C_RL_JUMP:
1633 case 0xbb: /* jmp.b */
1634 if (pcrel >= 2 && pcrel <= 9)
1637 /* Relax JMP.B -> JMP.S. We need to get rid of
1638 the following reloc though. */
1639 insn[0] = 0x4a | ((p << 3) & 0x30) | (p & 1);
1640 new_type = R_M32C_NONE;
1641 irel->r_addend = 0x10;
1647 case 0xce: /* jmp.w */
1648 if (pcrel <= 128 && pcrel >= -128)
1650 /* Relax JMP.W -> JMP.B */
1653 new_type = R_M32C_8_PCREL;
1659 case 0xcc: /* jmp.a */
1660 if (pcrel <= 32768 && pcrel >= -32768)
1662 /* Relax JMP.A -> JMP.W */
1666 new_type = R_M32C_16_PCREL;
1672 case 0xcd: /* jsr.a */
1673 if (pcrel <= 32768 && pcrel >= -32768)
1675 /* Relax JSR.A -> JSR.W */
1679 new_type = R_M32C_16_PCREL;
1687 case R_M32C_RL_2ADDR:
1688 /* xSSS DDDx DDSS xxxx [src-disp] [dest-disp]*/
1694 /* prefix; remove it as far as the RL reloc is concerned. */
1699 enctbl = m32c_addr_encodings;
1700 enc = ((einsn[0] & 0x70) >> 2) | ((einsn[1] & 0x30) >> 4);
1703 if (srel->r_offset == irel->r_offset + posn
1704 && e->new_encoding != enc
1705 && symval <= e->max_disp)
1708 einsn[0] |= (e->new_encoding & 0x1c) << 2;
1710 einsn[1] |= (e->new_encoding & 0x03) << 4;
1711 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1712 gap = insn + posn + enctbl[e->new_encoding].bytes;
1713 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1716 if (relax_relocs == 2)
1722 case R_M32C_RL_1ADDR:
1723 /* xxxx DDDx DDxx xxxx [disp] */
1729 /* prefix; remove it as far as the RL reloc is concerned. */
1734 enctbl = m32c_addr_encodings;
1737 /* srel, posn, and enc must be set here. */
1739 symval = OFFSET_FOR_RELOC (srel);
1740 enc = ((einsn[0] & 0x0e) << 1) | ((einsn[1] & 0xc0) >> 6);
1743 if (srel->r_offset == irel->r_offset + posn
1744 && e->new_encoding != enc
1745 && symval <= e->max_disp)
1748 einsn[0] |= (e->new_encoding & 0x1c) >> 1;
1750 einsn[1] |= (e->new_encoding & 0x03) << 6;
1751 gap_size = e->bytes - enctbl[e->new_encoding].bytes;
1752 gap = insn + posn + enctbl[e->new_encoding].bytes;
1753 new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
1759 } /* Ends switch (reloc type) for m32c. */
1767 srel->r_info = ELF32_R_INFO (ELF32_R_SYM (srel->r_info), new_type);
1769 /* Note that we've changed the relocs, section contents, etc. */
1770 elf_section_data (sec)->relocs = internal_relocs;
1773 elf_section_data (sec)->this_hdr.contents = contents;
1774 free_contents = NULL;
1776 symtab_hdr->contents = (bfd_byte *) intsyms;
1777 free_intsyms = NULL;
1779 bytes_saved += gap_size;
1781 if (! m32c_elf_relax_delete_bytes(abfd, sec, gap - contents, gap_size))
1784 } /* next relocation */
1786 if (free_relocs != NULL)
1792 if (free_contents != NULL)
1794 if (! link_info->keep_memory)
1795 free (free_contents);
1796 /* Cache the section contents for elf_link_input_bfd. */
1798 elf_section_data (sec)->this_hdr.contents = contents;
1800 free_contents = NULL;
1803 if (shndx_buf != NULL)
1805 shndx_hdr->contents = NULL;
1809 if (free_intsyms != NULL)
1811 if (! link_info->keep_memory)
1812 free (free_intsyms);
1813 /* Cache the symbols for elf_link_input_bfd. */
1816 symtab_hdr->contents = NULL /* (unsigned char *) intsyms*/;
1819 free_intsyms = NULL;
1825 if (free_relocs != NULL)
1827 if (free_contents != NULL)
1828 free (free_contents);
1829 if (shndx_buf != NULL)
1831 shndx_hdr->contents = NULL;
1834 if (free_intsyms != NULL)
1835 free (free_intsyms);
1839 /* Delete some bytes from a section while relaxing. */
1842 m32c_elf_relax_delete_bytes
1848 Elf_Internal_Shdr *symtab_hdr;
1849 Elf_Internal_Shdr *shndx_hdr;
1852 Elf_Internal_Rela *irel;
1853 Elf_Internal_Rela *irelend;
1855 Elf_Internal_Sym *isym;
1856 Elf_Internal_Sym *isymend;
1857 Elf_Internal_Sym *intsyms;
1858 Elf_External_Sym_Shndx *shndx_buf;
1859 Elf_External_Sym_Shndx *shndx;
1860 struct elf_link_hash_entry ** sym_hashes;
1861 struct elf_link_hash_entry ** end_hashes;
1862 unsigned int symcount;
1864 contents = elf_section_data (sec)->this_hdr.contents;
1868 irel = elf_section_data (sec)->relocs;
1869 irelend = irel + sec->reloc_count;
1871 /* Actually delete the bytes. */
1872 memmove (contents + addr, contents + addr + count, (size_t) (toaddr - addr - count));
1875 /* Adjust all the relocs. */
1876 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel ++)
1878 /* Get the new reloc address. */
1879 if (irel->r_offset > addr && irel->r_offset < toaddr)
1880 irel->r_offset -= count;
1882 if (ELF32_R_TYPE(irel->r_info) == R_M32C_RL_JUMP
1883 && irel->r_addend == 0x10 /* one byte insn, no relocs */
1884 && irel->r_offset + 1 < addr
1885 && irel->r_offset + 7 > addr)
1888 unsigned char *insn = &contents[irel->r_offset];
1890 /* This is a JMP.S, which we have to manually update. */
1891 if (elf32_m32c_machine (abfd) == bfd_mach_m16c)
1893 if ((*insn & 0xf8) != 0x60)
1899 if ((*insn & 0xce) != 0x4a)
1901 disp = ((disp & 0x30) >> 3) | (disp & 1);
1903 if (irel->r_offset + disp + 2 >= addr+count)
1906 if (elf32_m32c_machine (abfd) == bfd_mach_m16c)
1908 *insn = (*insn & 0xf8) | disp;
1912 *insn = (*insn & 0xce) | ((disp & 6) << 3) | (disp & 1);
1918 /* Adjust the local symbols defined in this section. */
1919 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
1920 intsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
1922 isymend = isym + symtab_hdr->sh_info;
1924 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1925 shndx_hdr = & elf_tdata (abfd)->symtab_shndx_hdr;
1926 shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents;
1929 for (; isym < isymend; isym++, shndx = (shndx ? shndx + 1 : NULL))
1931 /* If the symbol is in the range of memory we just moved, we
1932 have to adjust its value. */
1933 if ((int) isym->st_shndx == sec_shndx
1934 && isym->st_value > addr
1935 && isym->st_value < toaddr)
1937 isym->st_value -= count;
1939 /* If the symbol *spans* the bytes we just deleted (i.e. it's
1940 *end* is in the moved bytes but it's *start* isn't), then we
1941 must adjust its size. */
1942 if ((int) isym->st_shndx == sec_shndx
1943 && isym->st_value < addr
1944 && isym->st_value + isym->st_size > addr
1945 && isym->st_value + isym->st_size < toaddr)
1947 isym->st_size -= count;
1951 /* Now adjust the global symbols defined in this section. */
1952 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1953 - symtab_hdr->sh_info);
1954 sym_hashes = elf_sym_hashes (abfd);
1955 // sym_hashes += symtab_hdr->sh_info;
1956 end_hashes = sym_hashes + symcount;
1958 for (; sym_hashes < end_hashes; sym_hashes ++)
1960 struct elf_link_hash_entry * sym_hash = * sym_hashes;
1963 (sym_hash->root.type == bfd_link_hash_defined
1964 || sym_hash->root.type == bfd_link_hash_defweak)
1965 && sym_hash->root.u.def.section == sec)
1967 if (sym_hash->root.u.def.value > addr
1968 && sym_hash->root.u.def.value < toaddr)
1970 sym_hash->root.u.def.value -= count;
1972 if (sym_hash->root.u.def.value < addr
1973 && sym_hash->root.u.def.value + sym_hash->size > addr
1974 && sym_hash->root.u.def.value + sym_hash->size < toaddr)
1976 sym_hash->size -= count;
1984 /* This is for versions of gcc prior to 4.3. */
1986 _bfd_m32c_elf_eh_frame_address_size (bfd *abfd, asection *sec ATTRIBUTE_UNUSED)
1988 if ((elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK) == EF_M32C_CPU_M16C)
1995 #define ELF_ARCH bfd_arch_m32c
1996 #define ELF_MACHINE_CODE EM_M32C
1997 #define ELF_MACHINE_ALT1 EM_M32C_OLD
1998 #define ELF_MAXPAGESIZE 0x100
2001 #define TARGET_BIG_SYM bfd_elf32_m32c_vec
2002 #define TARGET_BIG_NAME "elf32-m32c"
2004 #define TARGET_LITTLE_SYM bfd_elf32_m32c_vec
2005 #define TARGET_LITTLE_NAME "elf32-m32c"
2008 #define elf_info_to_howto_rel NULL
2009 #define elf_info_to_howto m32c_info_to_howto_rela
2010 #define elf_backend_object_p m32c_elf_object_p
2011 #define elf_backend_relocate_section m32c_elf_relocate_section
2012 #define elf_backend_check_relocs m32c_elf_check_relocs
2013 #define elf_backend_object_p m32c_elf_object_p
2014 #define elf_symbol_leading_char ('_')
2015 #define elf_backend_always_size_sections \
2016 m32c_elf_always_size_sections
2017 #define elf_backend_finish_dynamic_sections \
2018 m32c_elf_finish_dynamic_sections
2020 #define elf_backend_can_gc_sections 1
2021 #define elf_backend_eh_frame_address_size _bfd_m32c_elf_eh_frame_address_size
2023 #define bfd_elf32_bfd_reloc_type_lookup m32c_reloc_type_lookup
2024 #define bfd_elf32_bfd_reloc_name_lookup m32c_reloc_name_lookup
2025 #define bfd_elf32_bfd_relax_section m32c_elf_relax_section
2026 #define bfd_elf32_bfd_set_private_flags m32c_elf_set_private_flags
2027 #define bfd_elf32_bfd_merge_private_bfd_data m32c_elf_merge_private_bfd_data
2028 #define bfd_elf32_bfd_print_private_bfd_data m32c_elf_print_private_bfd_data
2030 #include "elf32-target.h"