1 /* Generic support for 32-bit ELF
2 Copyright 1993, 1995, 1998, 1999, 2001, 2002
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 2 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. */
27 static reloc_howto_type *elf32_h8_reloc_type_lookup
28 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
29 static void elf32_h8_info_to_howto
30 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
31 static void elf32_h8_info_to_howto_rel
32 PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
33 static unsigned long elf32_h8_mach
35 static void elf32_h8_final_write_processing
36 PARAMS ((bfd *, boolean));
37 static boolean elf32_h8_object_p
39 static boolean elf32_h8_merge_private_bfd_data
40 PARAMS ((bfd *, bfd *));
41 static boolean elf32_h8_relax_section
42 PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
43 static boolean elf32_h8_relax_delete_bytes
44 PARAMS ((bfd *, asection *, bfd_vma, int));
45 static boolean elf32_h8_symbol_address_p
46 PARAMS ((bfd *, asection *, bfd_vma));
47 static bfd_byte *elf32_h8_get_relocated_section_contents
48 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
49 bfd_byte *, boolean, asymbol **));
50 static bfd_reloc_status_type elf32_h8_final_link_relocate
51 PARAMS ((unsigned long, bfd *, bfd *, asection *,
52 bfd_byte *, bfd_vma, bfd_vma, bfd_vma,
53 struct bfd_link_info *, asection *, int));
54 static boolean elf32_h8_relocate_section
55 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
56 bfd_byte *, Elf_Internal_Rela *,
57 Elf_Internal_Sym *, asection **));
58 static bfd_reloc_status_type special
59 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
61 /* This does not include any relocation information, but should be
62 good enough for GDB or objdump to read the file. */
64 static reloc_howto_type h8_elf_howto_table[] =
67 HOWTO (R_H8_NONE, /* type */
69 0, /* size (0 = byte, 1 = short, 2 = long) */
71 false, /* pc_relative */
73 complain_overflow_dont, /* complain_on_overflow */
74 special, /* special_function */
75 "R_H8_NONE", /* name */
76 false, /* partial_inplace */
79 false), /* pcrel_offset */
80 #define R_H8_DIR32_X (R_H8_NONE_X + 1)
81 HOWTO (R_H8_DIR32, /* type */
83 2, /* size (0 = byte, 1 = short, 2 = long) */
85 false, /* pc_relative */
87 complain_overflow_dont, /* complain_on_overflow */
88 special, /* special_function */
89 "R_H8_DIR32", /* name */
90 false, /* partial_inplace */
92 0xffffffff, /* dst_mask */
93 false), /* pcrel_offset */
94 #define R_H8_DIR16_X (R_H8_DIR32_X + 1)
95 HOWTO (R_H8_DIR16, /* type */
97 1, /* size (0 = byte, 1 = short, 2 = long) */
99 false, /* pc_relative */
101 complain_overflow_dont, /* complain_on_overflow */
102 special, /* special_function */
103 "R_H8_DIR16", /* name */
104 false, /* partial_inplace */
106 0x0000ffff, /* dst_mask */
107 false), /* pcrel_offset */
108 #define R_H8_DIR8_X (R_H8_DIR16_X + 1)
109 HOWTO (R_H8_DIR8, /* type */
111 0, /* size (0 = byte, 1 = short, 2 = long) */
113 false, /* pc_relative */
115 complain_overflow_dont, /* complain_on_overflow */
116 special, /* special_function */
117 "R_H8_DIR16", /* name */
118 false, /* partial_inplace */
120 0x000000ff, /* dst_mask */
121 false), /* pcrel_offset */
122 #define R_H8_DIR16A8_X (R_H8_DIR8_X + 1)
123 HOWTO (R_H8_DIR16A8, /* type */
125 1, /* size (0 = byte, 1 = short, 2 = long) */
127 false, /* pc_relative */
129 complain_overflow_bitfield, /* complain_on_overflow */
130 special, /* special_function */
131 "R_H8_DIR16A8", /* name */
132 false, /* partial_inplace */
134 0x0000ffff, /* dst_mask */
135 false), /* pcrel_offset */
136 #define R_H8_DIR16R8_X (R_H8_DIR16A8_X + 1)
137 HOWTO (R_H8_DIR16R8, /* type */
139 1, /* size (0 = byte, 1 = short, 2 = long) */
141 false, /* pc_relative */
143 complain_overflow_bitfield, /* complain_on_overflow */
144 special, /* special_function */
145 "R_H8_DIR16R8", /* name */
146 false, /* partial_inplace */
148 0x0000ffff, /* dst_mask */
149 false), /* pcrel_offset */
150 #define R_H8_DIR24A8_X (R_H8_DIR16R8_X + 1)
151 HOWTO (R_H8_DIR24A8, /* type */
153 2, /* size (0 = byte, 1 = short, 2 = long) */
155 false, /* pc_relative */
157 complain_overflow_bitfield, /* complain_on_overflow */
158 special, /* special_function */
159 "R_H8_DIR24A8", /* name */
160 true, /* partial_inplace */
161 0xff000000, /* src_mask */
162 0x00ffffff, /* dst_mask */
163 false), /* pcrel_offset */
164 #define R_H8_DIR24R8_X (R_H8_DIR24A8_X + 1)
165 HOWTO (R_H8_DIR24R8, /* type */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
169 false, /* pc_relative */
171 complain_overflow_bitfield, /* complain_on_overflow */
172 special, /* special_function */
173 "R_H8_DIR24R8", /* name */
174 true, /* partial_inplace */
175 0xff000000, /* src_mask */
176 0x00ffffff, /* dst_mask */
177 false), /* pcrel_offset */
178 #define R_H8_DIR32A16_X (R_H8_DIR24R8_X + 1)
179 HOWTO (R_H8_DIR32A16, /* type */
181 2, /* size (0 = byte, 1 = short, 2 = long) */
183 false, /* pc_relative */
185 complain_overflow_dont, /* complain_on_overflow */
186 special, /* special_function */
187 "R_H8_DIR32", /* name */
188 false, /* partial_inplace */
190 0xffffffff, /* dst_mask */
191 false), /* pcrel_offset */
192 #define R_H8_PCREL16_X (R_H8_DIR32A16_X + 1)
193 HOWTO (R_H8_PCREL16, /* type */
195 1, /* size (0 = byte, 1 = short, 2 = long) */
197 true, /* pc_relative */
199 complain_overflow_signed, /* complain_on_overflow */
200 special, /* special_function */
201 "R_H8_PCREL16", /* name */
202 false, /* partial_inplace */
203 0xffff, /* src_mask */
204 0xffff, /* dst_mask */
205 true), /* pcrel_offset */
206 #define R_H8_PCREL8_X (R_H8_PCREL16_X + 1)
207 HOWTO (R_H8_PCREL8, /* type */
209 0, /* size (0 = byte, 1 = short, 2 = long) */
211 true, /* pc_relative */
213 complain_overflow_signed, /* complain_on_overflow */
214 special, /* special_function */
215 "R_H8_PCREL8", /* name */
216 false, /* partial_inplace */
219 true), /* pcrel_offset */
222 /* This structure is used to map BFD reloc codes to H8 ELF relocs. */
226 bfd_reloc_code_real_type bfd_reloc_val;
227 unsigned char howto_index;
230 /* An array mapping BFD reloc codes to SH ELF relocs. */
232 static const struct elf_reloc_map h8_reloc_map[] =
234 { BFD_RELOC_NONE, R_H8_NONE_X },
235 { BFD_RELOC_32, R_H8_DIR32_X },
236 { BFD_RELOC_16, R_H8_DIR16_X },
237 { BFD_RELOC_8, R_H8_DIR8_X },
238 { BFD_RELOC_H8_DIR16A8, R_H8_DIR16A8_X },
239 { BFD_RELOC_H8_DIR16R8, R_H8_DIR16R8_X },
240 { BFD_RELOC_H8_DIR24A8, R_H8_DIR24A8_X },
241 { BFD_RELOC_H8_DIR24R8, R_H8_DIR24R8_X },
242 { BFD_RELOC_H8_DIR32A16, R_H8_DIR32A16_X },
243 { BFD_RELOC_16_PCREL, R_H8_PCREL16_X },
244 { BFD_RELOC_8_PCREL, R_H8_PCREL8_X },
248 static reloc_howto_type *
249 elf32_h8_reloc_type_lookup (abfd, code)
250 bfd *abfd ATTRIBUTE_UNUSED;
251 bfd_reloc_code_real_type code;
255 for (i = 0; i < sizeof (h8_reloc_map) / sizeof (struct elf_reloc_map); i++)
257 if (h8_reloc_map[i].bfd_reloc_val == code)
258 return &h8_elf_howto_table[(int) h8_reloc_map[i].howto_index];
264 elf32_h8_info_to_howto (abfd, bfd_reloc, elf_reloc)
265 bfd *abfd ATTRIBUTE_UNUSED;
267 Elf32_Internal_Rela *elf_reloc;
272 r = ELF32_R_TYPE (elf_reloc->r_info);
273 for (i = 0; i < sizeof (h8_elf_howto_table) / sizeof (reloc_howto_type); i++)
274 if (h8_elf_howto_table[i].type== r)
276 bfd_reloc->howto = &h8_elf_howto_table[i];
283 elf32_h8_info_to_howto_rel (abfd, bfd_reloc, elf_reloc)
284 bfd *abfd ATTRIBUTE_UNUSED;
286 Elf32_Internal_Rel *elf_reloc ATTRIBUTE_UNUSED;
291 r = ELF32_R_TYPE (elf_reloc->r_info);
292 bfd_reloc->howto = &h8_elf_howto_table[r];
295 /* Special handling for H8/300 relocs.
296 We only come here for pcrel stuff and return normally if not an -r link.
297 When doing -r, we can't do any arithmetic for the pcrel stuff, because
298 we support relaxing on the H8/300 series chips. */
299 static bfd_reloc_status_type
300 special (abfd, reloc_entry, symbol, data, input_section, output_bfd,
302 bfd *abfd ATTRIBUTE_UNUSED;
303 arelent *reloc_entry ATTRIBUTE_UNUSED;
304 asymbol *symbol ATTRIBUTE_UNUSED;
305 PTR data ATTRIBUTE_UNUSED;
306 asection *input_section ATTRIBUTE_UNUSED;
308 char **error_message ATTRIBUTE_UNUSED;
310 if (output_bfd == (bfd *) NULL)
311 return bfd_reloc_continue;
313 /* Adjust the reloc address to that in the output section. */
314 reloc_entry->address += input_section->output_offset;
318 /* Perform a relocation as part of a final link. */
319 static bfd_reloc_status_type
320 elf32_h8_final_link_relocate (r_type, input_bfd, output_bfd,
321 input_section, contents, offset, value,
322 addend, info, sym_sec, is_local)
323 unsigned long r_type;
325 bfd *output_bfd ATTRIBUTE_UNUSED;
326 asection *input_section ATTRIBUTE_UNUSED;
331 struct bfd_link_info *info ATTRIBUTE_UNUSED;
332 asection *sym_sec ATTRIBUTE_UNUSED;
333 int is_local ATTRIBUTE_UNUSED;
335 bfd_byte *hit_data = contents + offset;
347 bfd_put_32 (input_bfd, value, hit_data);
354 bfd_put_16 (input_bfd, value, hit_data);
361 bfd_put_8 (input_bfd, value, hit_data);
367 /* HIT_DATA is the address for the first byte for the relocated
368 value. Subtract 1 so that we can manipulate the data in 32bit
372 /* Clear out the top byte in value. */
375 /* Retrieve the type byte for value from the section contents. */
376 value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000);
378 /* Now scribble it out in one 32bit hunk. */
379 bfd_put_32 (input_bfd, value, hit_data);
383 value -= (input_section->output_section->vma
384 + input_section->output_offset);
388 /* The value is relative to the start of the instruction,
389 not the relocation offset. Subtract 2 to account for
393 bfd_put_16 (input_bfd, value, hit_data);
397 value -= (input_section->output_section->vma
398 + input_section->output_offset);
402 /* The value is relative to the start of the instruction,
403 not the relocation offset. Subtract 1 to account for
407 bfd_put_8 (input_bfd, value, hit_data);
411 return bfd_reloc_notsupported;
415 /* Relocate an H8 ELF section. */
417 elf32_h8_relocate_section (output_bfd, info, input_bfd, input_section,
418 contents, relocs, local_syms, local_sections)
420 struct bfd_link_info *info;
422 asection *input_section;
424 Elf_Internal_Rela *relocs;
425 Elf_Internal_Sym *local_syms;
426 asection **local_sections;
428 Elf_Internal_Shdr *symtab_hdr;
429 struct elf_link_hash_entry **sym_hashes;
430 Elf_Internal_Rela *rel, *relend;
432 if (info->relocateable)
435 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
436 sym_hashes = elf_sym_hashes (input_bfd);
439 relend = relocs + input_section->reloc_count;
440 for (; rel < relend; rel++)
443 unsigned long r_symndx;
444 Elf_Internal_Sym *sym;
446 struct elf_link_hash_entry *h;
448 bfd_reloc_status_type r;
450 /* This is a final link. */
451 r_symndx = ELF32_R_SYM (rel->r_info);
452 r_type = ELF32_R_TYPE (rel->r_info);
456 if (r_symndx < symtab_hdr->sh_info)
458 sym = local_syms + r_symndx;
459 sec = local_sections[r_symndx];
460 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
464 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
465 while (h->root.type == bfd_link_hash_indirect
466 || h->root.type == bfd_link_hash_warning)
467 h = (struct elf_link_hash_entry *) h->root.u.i.link;
468 if (h->root.type == bfd_link_hash_defined
469 || h->root.type == bfd_link_hash_defweak)
471 sec = h->root.u.def.section;
472 relocation = (h->root.u.def.value
473 + sec->output_section->vma
474 + sec->output_offset);
476 else if (h->root.type == bfd_link_hash_undefweak)
480 if (! ((*info->callbacks->undefined_symbol)
481 (info, h->root.root.string, input_bfd,
482 input_section, rel->r_offset, true)))
488 r = elf32_h8_final_link_relocate (r_type, input_bfd, output_bfd,
490 contents, rel->r_offset,
491 relocation, rel->r_addend,
492 info, sec, h == NULL);
494 if (r != bfd_reloc_ok)
497 const char *msg = (const char *) 0;
499 reloc_howto_type *howto;
501 elf32_h8_info_to_howto (input_bfd, &bfd_reloc, rel);
502 howto = bfd_reloc.howto;
505 name = h->root.root.string;
508 name = (bfd_elf_string_from_elf_section
509 (input_bfd, symtab_hdr->sh_link, sym->st_name));
510 if (name == NULL || *name == '\0')
511 name = bfd_section_name (input_bfd, sec);
516 case bfd_reloc_overflow:
517 if (! ((*info->callbacks->reloc_overflow)
518 (info, name, howto->name, (bfd_vma) 0,
519 input_bfd, input_section, rel->r_offset)))
523 case bfd_reloc_undefined:
524 if (! ((*info->callbacks->undefined_symbol)
525 (info, name, input_bfd, input_section,
526 rel->r_offset, true)))
530 case bfd_reloc_outofrange:
531 msg = _("internal error: out of range error");
534 case bfd_reloc_notsupported:
535 msg = _("internal error: unsupported relocation error");
538 case bfd_reloc_dangerous:
539 msg = _("internal error: dangerous error");
543 msg = _("internal error: unknown error");
547 if (!((*info->callbacks->warning)
548 (info, msg, name, input_bfd, input_section,
559 /* Object files encode the specific H8 model they were compiled
560 for in the ELF flags field.
562 Examine that field and return the proper BFD machine type for
565 elf32_h8_mach (flags)
568 switch (flags & EF_H8_MACH)
570 case E_H8_MACH_H8300:
572 return bfd_mach_h8300;
574 case E_H8_MACH_H8300H:
575 return bfd_mach_h8300h;
577 case E_H8_MACH_H8300S:
578 return bfd_mach_h8300s;
582 /* The final processing done just before writing out a H8 ELF object
583 file. We use this opportunity to encode the BFD machine type
584 into the flags field in the object file. */
587 elf32_h8_final_write_processing (abfd, linker)
589 boolean linker ATTRIBUTE_UNUSED;
593 switch (bfd_get_mach (abfd))
597 val = E_H8_MACH_H8300;
600 case bfd_mach_h8300h:
601 val = E_H8_MACH_H8300H;
604 case bfd_mach_h8300s:
605 val = E_H8_MACH_H8300S;
609 elf_elfheader (abfd)->e_flags &= ~ (EF_H8_MACH);
610 elf_elfheader (abfd)->e_flags |= val;
613 /* Return nonzero if ABFD represents a valid H8 ELF object file; also
614 record the encoded machine type found in the ELF flags. */
617 elf32_h8_object_p (abfd)
620 bfd_default_set_arch_mach (abfd, bfd_arch_h8300,
621 elf32_h8_mach (elf_elfheader (abfd)->e_flags));
625 /* Merge backend specific data from an object file to the output
626 object file when linking. The only data we need to copy at this
627 time is the architecture/machine information. */
630 elf32_h8_merge_private_bfd_data (ibfd, obfd)
634 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
635 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
638 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
639 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
641 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
642 bfd_get_mach (ibfd)))
649 /* This function handles relaxing for the H8..
651 There's a few relaxing opportunites available on the H8:
653 jmp/jsr:24 -> bra/bsr:8 2 bytes
654 The jmp may be completely eliminated if the previous insn is a
655 conditional branch to the insn after the jump. In that case
656 we invert the branch and delete the jump and save 4 bytes.
658 bCC:16 -> bCC:8 2 bytes
659 bsr:16 -> bsr:8 2 bytes
661 mov.b:16 -> mov.b:8 2 bytes
662 mov.b:24/32 -> mov.b:8 4 bytes
664 mov.[bwl]:24/32 -> mov.[bwl]:16 2 bytes */
667 elf32_h8_relax_section (abfd, sec, link_info, again)
670 struct bfd_link_info *link_info;
673 Elf_Internal_Shdr *symtab_hdr;
674 Elf_Internal_Rela *internal_relocs;
675 Elf_Internal_Rela *irel, *irelend;
676 bfd_byte *contents = NULL;
677 Elf_Internal_Sym *isymbuf = NULL;
678 static asection *last_input_section = NULL;
679 static Elf_Internal_Rela *last_reloc = NULL;
681 /* Assume nothing changes. */
684 /* We don't have to do anything for a relocateable link, if
685 this section does not have relocs, or if this is not a
687 if (link_info->relocateable
688 || (sec->flags & SEC_RELOC) == 0
689 || sec->reloc_count == 0
690 || (sec->flags & SEC_CODE) == 0)
693 /* If this is the first time we have been called for this section,
694 initialize the cooked size. */
695 if (sec->_cooked_size == 0)
696 sec->_cooked_size = sec->_raw_size;
698 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
700 /* Get a copy of the native relocations. */
701 internal_relocs = (_bfd_elf32_link_read_relocs
702 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
703 link_info->keep_memory));
704 if (internal_relocs == NULL)
707 if (sec != last_input_section)
710 last_input_section = sec;
712 /* Walk through the relocs looking for relaxing opportunities. */
713 irelend = internal_relocs + sec->reloc_count;
714 for (irel = internal_relocs; irel < irelend; irel++)
718 /* Keep track of the previous reloc so that we can delete
719 some long jumps created by the compiler. */
720 if (irel != internal_relocs)
721 last_reloc = irel - 1;
723 if (ELF32_R_TYPE (irel->r_info) != R_H8_DIR24R8
724 && ELF32_R_TYPE (irel->r_info) != R_H8_PCREL16
725 && ELF32_R_TYPE (irel->r_info) != R_H8_DIR16A8
726 && ELF32_R_TYPE (irel->r_info) != R_H8_DIR24A8
727 && ELF32_R_TYPE (irel->r_info) != R_H8_DIR32A16)
730 /* Get the section contents if we haven't done so already. */
731 if (contents == NULL)
733 /* Get cached copy if it exists. */
734 if (elf_section_data (sec)->this_hdr.contents != NULL)
735 contents = elf_section_data (sec)->this_hdr.contents;
738 /* Go get them off disk. */
739 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
740 if (contents == NULL)
743 if (! bfd_get_section_contents (abfd, sec, contents,
744 (file_ptr) 0, sec->_raw_size))
749 /* Read this BFD's local symbols if we haven't done so already. */
750 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
752 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
754 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
755 symtab_hdr->sh_info, 0,
761 /* Get the value of the symbol referred to by the reloc. */
762 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
764 /* A local symbol. */
765 Elf_Internal_Sym *isym;
768 isym = isymbuf + ELF64_R_SYM (irel->r_info);
769 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
770 symval = (isym->st_value
771 + sym_sec->output_section->vma
772 + sym_sec->output_offset);
777 struct elf_link_hash_entry *h;
779 /* An external symbol. */
780 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
781 h = elf_sym_hashes (abfd)[indx];
782 BFD_ASSERT (h != NULL);
783 if (h->root.type != bfd_link_hash_defined
784 && h->root.type != bfd_link_hash_defweak)
786 /* This appears to be a reference to an undefined
787 symbol. Just ignore it--it will be caught by the
788 regular reloc processing. */
792 symval = (h->root.u.def.value
793 + h->root.u.def.section->output_section->vma
794 + h->root.u.def.section->output_offset);
797 /* For simplicity of coding, we are going to modify the section
798 contents, the section relocs, and the BFD symbol table. We
799 must tell the rest of the code not to free up this
800 information. It would be possible to instead create a table
801 of changes which have to be made, as is done in coff-mips.c;
802 that would be more work, but would require less memory when
803 the linker is run. */
804 switch (ELF32_R_TYPE (irel->r_info))
806 /* Try to turn a 24 bit absolute branch/call into an 8 bit
807 pc-relative branch/call. */
810 bfd_vma value = symval + irel->r_addend;
813 /* Get the address of this instruction. */
814 dot = (sec->output_section->vma
815 + sec->output_offset + irel->r_offset - 1);
817 /* Compute the distance from this insn to the branch target. */
820 /* If the distance is within -126..+130 inclusive, then we can
821 relax this jump. +130 is valid since the target will move
822 two bytes closer if we do relax this branch. */
823 if ((int) gap >= -126 && (int) gap <= 130)
827 /* Note that we've changed the relocs, section contents,
829 elf_section_data (sec)->relocs = internal_relocs;
830 elf_section_data (sec)->this_hdr.contents = contents;
831 symtab_hdr->contents = (unsigned char *) isymbuf;
833 /* If the previous instruction conditionally jumped around
834 this instruction, we may be able to reverse the condition
835 and redirect the previous instruction to the target of
838 Such sequences are used by the compiler to deal with
839 long conditional branches. */
843 && ELF32_R_TYPE (last_reloc->r_info) == R_H8_PCREL8
844 && ELF32_R_SYM (last_reloc->r_info) < symtab_hdr->sh_info)
847 asection *last_sym_sec;
848 Elf_Internal_Sym *last_sym;
850 /* We will need to examine the symbol used by the
851 previous relocation. */
853 last_sym = isymbuf + ELF32_R_SYM (last_reloc->r_info);
855 = bfd_section_from_elf_index (abfd, last_sym->st_shndx);
856 last_value = (last_sym->st_value
857 + last_sym_sec->output_section->vma
858 + last_sym_sec->output_offset);
860 /* Verify that the previous relocation was for a
861 branch around this instruction and that no symbol
862 exists at the current location. */
863 if (last_value == dot + 4
864 && last_reloc->r_offset + 2 == irel->r_offset
865 && ! elf32_h8_symbol_address_p (abfd, sec, dot))
867 /* We can eliminate this jump. Twiddle the
868 previous relocation as necessary. */
870 = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
871 ELF32_R_TYPE (R_H8_NONE));
874 = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
875 ELF32_R_TYPE (R_H8_PCREL8));
876 last_reloc->r_addend = irel->r_addend;
879 code = bfd_get_8 (abfd,
880 contents + last_reloc->r_offset - 1);
884 contents + last_reloc->r_offset - 1);
886 /* Delete four bytes of data. */
887 if (!elf32_h8_relax_delete_bytes (abfd, sec,
897 /* We could not eliminate this jump, so just shorten it. */
898 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
901 bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 1);
902 else if (code == 0x5a)
903 bfd_put_8 (abfd, 0x40, contents + irel->r_offset - 1);
907 /* Fix the relocation's type. */
908 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
911 /* Delete two bytes of data. */
912 if (!elf32_h8_relax_delete_bytes (abfd, sec,
913 irel->r_offset + 1, 2))
916 /* That will change things, so, we should relax again.
917 Note that this is not required, and it may be slow. */
923 /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
927 bfd_vma value = symval + irel->r_addend;
931 /* Get the address of this instruction. */
932 dot = (sec->output_section->vma
934 + irel->r_offset - 2);
938 /* If the distance is within -126..+130 inclusive, then we can
939 relax this jump. +130 is valid since the target will move
940 two bytes closer if we do relax this branch. */
941 if ((int)gap >= -126 && (int)gap <= 130)
945 /* Note that we've changed the relocs, section contents,
947 elf_section_data (sec)->relocs = internal_relocs;
948 elf_section_data (sec)->this_hdr.contents = contents;
949 symtab_hdr->contents = (unsigned char *) isymbuf;
951 /* Get the opcode. */
952 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
956 /* bCC:16 -> bCC:8 */
957 /* Get the condition code from the original insn. */
958 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
962 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
964 else if (code == 0x5c)
965 bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 2);
969 /* Fix the relocation's type. */
970 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
974 /* Delete two bytes of data. */
975 if (!elf32_h8_relax_delete_bytes (abfd, sec,
976 irel->r_offset + 1, 2))
979 /* That will change things, so, we should relax again.
980 Note that this is not required, and it may be slow. */
986 /* This is a 16 bit absolute address in a "mov.b" insn, which may
987 become an 8 bit absolute address if its in the right range. */
990 bfd_vma value = symval + irel->r_addend;
992 if ((bfd_get_mach (abfd) == bfd_mach_h8300
995 || ((bfd_get_mach (abfd) == bfd_mach_h8300h
996 || bfd_get_mach (abfd) == bfd_mach_h8300s)
998 && value <= 0xffffff))
1002 /* Note that we've changed the relocs, section contents,
1004 elf_section_data (sec)->relocs = internal_relocs;
1005 elf_section_data (sec)->this_hdr.contents = contents;
1006 symtab_hdr->contents = (unsigned char *) isymbuf;
1008 /* Get the opcode. */
1009 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
1015 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
1017 if ((code & 0xf0) == 0x00)
1019 (code & 0xf) | 0x20,
1020 contents + irel->r_offset - 2);
1021 else if ((code & 0xf0) == 0x80)
1023 (code & 0xf) | 0x30,
1024 contents + irel->r_offset - 2);
1028 /* Fix the relocation's type. */
1029 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1032 /* Delete two bytes of data. */
1033 if (!elf32_h8_relax_delete_bytes (abfd, sec,
1034 irel->r_offset + 1, 2))
1037 /* That will change things, so, we should relax again.
1038 Note that this is not required, and it may be slow. */
1044 /* This is a 24 bit absolute address in a "mov.b" insn, which may
1045 become an 8 bit absolute address if its in the right range. */
1048 bfd_vma value = symval + irel->r_addend;
1050 if ((bfd_get_mach (abfd) == bfd_mach_h8300
1053 || ((bfd_get_mach (abfd) == bfd_mach_h8300h
1054 || bfd_get_mach (abfd) == bfd_mach_h8300s)
1055 && value >= 0xffff00
1056 && value <= 0xffffff))
1060 /* Note that we've changed the relocs, section contents,
1062 elf_section_data (sec)->relocs = internal_relocs;
1063 elf_section_data (sec)->this_hdr.contents = contents;
1064 symtab_hdr->contents = (unsigned char *) isymbuf;
1066 /* Get the opcode. */
1067 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
1073 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
1075 if ((code & 0xf0) == 0x00)
1077 (code & 0xf) | 0x20,
1078 contents + irel->r_offset - 2);
1079 else if ((code & 0xf0) == 0x80)
1081 (code & 0xf) | 0x30,
1082 contents + irel->r_offset - 2);
1086 /* Fix the relocation's type. */
1087 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1090 /* Delete two bytes of data. */
1091 if (!elf32_h8_relax_delete_bytes (abfd, sec, irel->r_offset, 2))
1094 /* That will change things, so, we should relax again.
1095 Note that this is not required, and it may be slow. */
1102 /* This is a 24/32bit absolute address in a "mov" insn, which may
1103 become a 16bit absoulte address if it is in the right range. */
1106 bfd_vma value = symval + irel->r_addend;
1108 if (value <= 0x7fff || value >= 0xff8000)
1112 /* Note that we've changed the relocs, section contents,
1114 elf_section_data (sec)->relocs = internal_relocs;
1115 elf_section_data (sec)->this_hdr.contents = contents;
1116 symtab_hdr->contents = (unsigned char *) isymbuf;
1118 /* Get the opcode. */
1119 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
1121 /* We just need to turn off bit 0x20. */
1124 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
1126 /* Fix the relocation's type. */
1127 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1130 /* Delete two bytes of data. */
1131 if (!elf32_h8_relax_delete_bytes (abfd, sec,
1132 irel->r_offset + 1, 2))
1135 /* That will change things, so, we should relax again.
1136 Note that this is not required, and it may be slow. */
1148 && symtab_hdr->contents != (unsigned char *) isymbuf)
1150 if (! link_info->keep_memory)
1153 symtab_hdr->contents = (unsigned char *) isymbuf;
1156 if (contents != NULL
1157 && elf_section_data (sec)->this_hdr.contents != contents)
1159 if (! link_info->keep_memory)
1163 /* Cache the section contents for elf_link_input_bfd. */
1164 elf_section_data (sec)->this_hdr.contents = contents;
1168 if (internal_relocs != NULL
1169 && elf_section_data (sec)->relocs != internal_relocs)
1170 free (internal_relocs);
1176 && symtab_hdr->contents != (unsigned char *) isymbuf)
1178 if (contents != NULL
1179 && elf_section_data (sec)->this_hdr.contents != contents)
1181 if (internal_relocs != NULL
1182 && elf_section_data (sec)->relocs != internal_relocs)
1183 free (internal_relocs);
1187 /* Delete some bytes from a section while relaxing. */
1190 elf32_h8_relax_delete_bytes (abfd, sec, addr, count)
1196 Elf_Internal_Shdr *symtab_hdr;
1197 unsigned int sec_shndx;
1199 Elf_Internal_Rela *irel, *irelend;
1200 Elf_Internal_Rela *irelalign;
1201 Elf_Internal_Sym *isym;
1202 Elf_Internal_Sym *isymend;
1204 struct elf_link_hash_entry **sym_hashes;
1205 struct elf_link_hash_entry **end_hashes;
1206 unsigned int symcount;
1208 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1210 contents = elf_section_data (sec)->this_hdr.contents;
1212 /* The deletion must stop at the next ALIGN reloc for an aligment
1213 power larger than the number of bytes we are deleting. */
1216 toaddr = sec->_cooked_size;
1218 irel = elf_section_data (sec)->relocs;
1219 irelend = irel + sec->reloc_count;
1221 /* Actually delete the bytes. */
1222 memmove (contents + addr, contents + addr + count,
1223 (size_t) (toaddr - addr - count));
1224 sec->_cooked_size -= count;
1226 /* Adjust all the relocs. */
1227 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
1229 /* Get the new reloc address. */
1230 if ((irel->r_offset > addr
1231 && irel->r_offset < toaddr))
1232 irel->r_offset -= count;
1235 /* Adjust the local symbols defined in this section. */
1236 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1237 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1238 isymend = isym + symtab_hdr->sh_info;
1239 for (; isym < isymend; isym++)
1241 if (isym->st_shndx == sec_shndx
1242 && isym->st_value > addr
1243 && isym->st_value < toaddr)
1244 isym->st_value -= count;
1247 /* Now adjust the global symbols defined in this section. */
1248 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1249 - symtab_hdr->sh_info);
1250 sym_hashes = elf_sym_hashes (abfd);
1251 end_hashes = sym_hashes + symcount;
1252 for (; sym_hashes < end_hashes; sym_hashes++)
1254 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1255 if ((sym_hash->root.type == bfd_link_hash_defined
1256 || sym_hash->root.type == bfd_link_hash_defweak)
1257 && sym_hash->root.u.def.section == sec
1258 && sym_hash->root.u.def.value > addr
1259 && sym_hash->root.u.def.value < toaddr)
1261 sym_hash->root.u.def.value -= count;
1268 /* Return true if a symbol exists at the given address, else return
1271 elf32_h8_symbol_address_p (abfd, sec, addr)
1276 Elf_Internal_Shdr *symtab_hdr;
1277 unsigned int sec_shndx;
1278 Elf_Internal_Sym *isym;
1279 Elf_Internal_Sym *isymend;
1280 struct elf_link_hash_entry **sym_hashes;
1281 struct elf_link_hash_entry **end_hashes;
1282 unsigned int symcount;
1284 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1286 /* Examine all the symbols. */
1287 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1288 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1289 isymend = isym + symtab_hdr->sh_info;
1290 for (; isym < isymend; isym++)
1292 if (isym->st_shndx == sec_shndx
1293 && isym->st_value == addr)
1297 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1298 - symtab_hdr->sh_info);
1299 sym_hashes = elf_sym_hashes (abfd);
1300 end_hashes = sym_hashes + symcount;
1301 for (; sym_hashes < end_hashes; sym_hashes++)
1303 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1304 if ((sym_hash->root.type == bfd_link_hash_defined
1305 || sym_hash->root.type == bfd_link_hash_defweak)
1306 && sym_hash->root.u.def.section == sec
1307 && sym_hash->root.u.def.value == addr)
1314 /* This is a version of bfd_generic_get_relocated_section_contents
1315 which uses elf32_h8_relocate_section. */
1318 elf32_h8_get_relocated_section_contents (output_bfd, link_info, link_order,
1319 data, relocateable, symbols)
1321 struct bfd_link_info *link_info;
1322 struct bfd_link_order *link_order;
1324 boolean relocateable;
1327 Elf_Internal_Shdr *symtab_hdr;
1328 asection *input_section = link_order->u.indirect.section;
1329 bfd *input_bfd = input_section->owner;
1330 asection **sections = NULL;
1331 Elf_Internal_Rela *internal_relocs = NULL;
1332 Elf_Internal_Sym *isymbuf = NULL;
1334 /* We only need to handle the case of relaxing, or of having a
1335 particular set of section contents, specially. */
1337 || elf_section_data (input_section)->this_hdr.contents == NULL)
1338 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
1343 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1345 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
1346 (size_t) input_section->_raw_size);
1348 if ((input_section->flags & SEC_RELOC) != 0
1349 && input_section->reloc_count > 0)
1352 Elf_Internal_Sym *isym, *isymend;
1355 internal_relocs = (_bfd_elf32_link_read_relocs
1356 (input_bfd, input_section, (PTR) NULL,
1357 (Elf_Internal_Rela *) NULL, false));
1358 if (internal_relocs == NULL)
1361 if (symtab_hdr->sh_info != 0)
1363 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1364 if (isymbuf == NULL)
1365 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1366 symtab_hdr->sh_info, 0,
1368 if (isymbuf == NULL)
1372 amt = symtab_hdr->sh_info;
1373 amt *= sizeof (asection *);
1374 sections = (asection **) bfd_malloc (amt);
1375 if (sections == NULL && amt != 0)
1378 isymend = isymbuf + symtab_hdr->sh_info;
1379 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
1383 if (isym->st_shndx == SHN_UNDEF)
1384 isec = bfd_und_section_ptr;
1385 else if (isym->st_shndx == SHN_ABS)
1386 isec = bfd_abs_section_ptr;
1387 else if (isym->st_shndx == SHN_COMMON)
1388 isec = bfd_com_section_ptr;
1390 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
1395 if (! elf32_h8_relocate_section (output_bfd, link_info, input_bfd,
1396 input_section, data, internal_relocs,
1400 if (sections != NULL)
1403 && symtab_hdr->contents != (unsigned char *) isymbuf)
1405 if (elf_section_data (input_section)->relocs != internal_relocs)
1406 free (internal_relocs);
1412 if (sections != NULL)
1415 && symtab_hdr->contents != (unsigned char *) isymbuf)
1417 if (internal_relocs != NULL
1418 && elf_section_data (input_section)->relocs != internal_relocs)
1419 free (internal_relocs);
1424 #define TARGET_BIG_SYM bfd_elf32_h8300_vec
1425 #define TARGET_BIG_NAME "elf32-h8300"
1426 #define ELF_ARCH bfd_arch_h8300
1427 #define ELF_MACHINE_CODE EM_H8_300
1428 #define ELF_MAXPAGESIZE 0x1
1429 #define bfd_elf32_bfd_reloc_type_lookup elf32_h8_reloc_type_lookup
1430 #define elf_info_to_howto elf32_h8_info_to_howto
1431 #define elf_info_to_howto_rel elf32_h8_info_to_howto_rel
1433 /* So we can set/examine bits in e_flags to get the specific
1434 H8 architecture in use. */
1435 #define elf_backend_final_write_processing \
1436 elf32_h8_final_write_processing
1437 #define elf_backend_object_p \
1439 #define bfd_elf32_bfd_merge_private_bfd_data \
1440 elf32_h8_merge_private_bfd_data
1442 /* ??? when elf_backend_relocate_section is not defined, elf32-target.h
1443 defaults to using _bfd_generic_link_hash_table_create, but
1444 elflink.h:bfd_elf32_size_dynamic_sections uses
1445 dynobj = elf_hash_table (info)->dynobj;
1446 and thus requires an elf hash table. */
1447 #define bfd_elf32_bfd_link_hash_table_create _bfd_elf_link_hash_table_create
1449 /* Use an H8 specific linker, not the ELF generic linker. */
1450 #define elf_backend_relocate_section elf32_h8_relocate_section
1451 #define elf_backend_rela_normal 1
1453 /* And relaxing stuff. */
1454 #define bfd_elf32_bfd_relax_section elf32_h8_relax_section
1455 #define bfd_elf32_bfd_get_relocated_section_contents \
1456 elf32_h8_get_relocated_section_contents
1459 #include "elf32-target.h"