1 /* BFD back-end for Renesas H8/300 ELF binaries.
2 Copyright 1993, 1995, 1998, 1999, 2001, 2002, 2003
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
*, Elf_Internal_Rela
*));
33 static unsigned long elf32_h8_mach
35 static void elf32_h8_final_write_processing
36 PARAMS ((bfd
*, bfd_boolean
));
37 static bfd_boolean elf32_h8_object_p
39 static bfd_boolean elf32_h8_merge_private_bfd_data
40 PARAMS ((bfd
*, bfd
*));
41 static bfd_boolean elf32_h8_relax_section
42 PARAMS ((bfd
*, asection
*, struct bfd_link_info
*, bfd_boolean
*));
43 static bfd_boolean elf32_h8_relax_delete_bytes
44 PARAMS ((bfd
*, asection
*, bfd_vma
, int));
45 static bfd_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
*, bfd_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 bfd_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
[] = {
66 HOWTO (R_H8_NONE
, /* type */
68 0, /* size (0 = byte, 1 = short, 2 = long) */
70 FALSE
, /* pc_relative */
72 complain_overflow_dont
,/* complain_on_overflow */
73 special
, /* special_function */
74 "R_H8_NONE", /* name */
75 FALSE
, /* partial_inplace */
78 FALSE
), /* pcrel_offset */
79 #define R_H8_DIR32_X (R_H8_NONE_X + 1)
80 HOWTO (R_H8_DIR32
, /* type */
82 2, /* size (0 = byte, 1 = short, 2 = long) */
84 FALSE
, /* pc_relative */
86 complain_overflow_dont
,/* complain_on_overflow */
87 special
, /* special_function */
88 "R_H8_DIR32", /* name */
89 FALSE
, /* partial_inplace */
91 0xffffffff, /* dst_mask */
92 FALSE
), /* pcrel_offset */
93 #define R_H8_DIR16_X (R_H8_DIR32_X + 1)
94 HOWTO (R_H8_DIR16
, /* type */
96 1, /* size (0 = byte, 1 = short, 2 = long) */
98 FALSE
, /* pc_relative */
100 complain_overflow_dont
,/* complain_on_overflow */
101 special
, /* special_function */
102 "R_H8_DIR16", /* name */
103 FALSE
, /* partial_inplace */
105 0x0000ffff, /* dst_mask */
106 FALSE
), /* pcrel_offset */
107 #define R_H8_DIR8_X (R_H8_DIR16_X + 1)
108 HOWTO (R_H8_DIR8
, /* type */
110 0, /* size (0 = byte, 1 = short, 2 = long) */
112 FALSE
, /* pc_relative */
114 complain_overflow_dont
,/* complain_on_overflow */
115 special
, /* special_function */
116 "R_H8_DIR8", /* name */
117 FALSE
, /* partial_inplace */
119 0x000000ff, /* dst_mask */
120 FALSE
), /* pcrel_offset */
121 #define R_H8_DIR16A8_X (R_H8_DIR8_X + 1)
122 HOWTO (R_H8_DIR16A8
, /* type */
124 1, /* size (0 = byte, 1 = short, 2 = long) */
126 FALSE
, /* pc_relative */
128 complain_overflow_bitfield
, /* complain_on_overflow */
129 special
, /* special_function */
130 "R_H8_DIR16A8", /* name */
131 FALSE
, /* partial_inplace */
133 0x0000ffff, /* dst_mask */
134 FALSE
), /* pcrel_offset */
135 #define R_H8_DIR16R8_X (R_H8_DIR16A8_X + 1)
136 HOWTO (R_H8_DIR16R8
, /* type */
138 1, /* size (0 = byte, 1 = short, 2 = long) */
140 FALSE
, /* pc_relative */
142 complain_overflow_bitfield
, /* complain_on_overflow */
143 special
, /* special_function */
144 "R_H8_DIR16R8", /* name */
145 FALSE
, /* partial_inplace */
147 0x0000ffff, /* dst_mask */
148 FALSE
), /* pcrel_offset */
149 #define R_H8_DIR24A8_X (R_H8_DIR16R8_X + 1)
150 HOWTO (R_H8_DIR24A8
, /* type */
152 2, /* size (0 = byte, 1 = short, 2 = long) */
154 FALSE
, /* pc_relative */
156 complain_overflow_bitfield
, /* complain_on_overflow */
157 special
, /* special_function */
158 "R_H8_DIR24A8", /* name */
159 TRUE
, /* partial_inplace */
160 0xff000000, /* src_mask */
161 0x00ffffff, /* dst_mask */
162 FALSE
), /* pcrel_offset */
163 #define R_H8_DIR24R8_X (R_H8_DIR24A8_X + 1)
164 HOWTO (R_H8_DIR24R8
, /* type */
166 2, /* size (0 = byte, 1 = short, 2 = long) */
168 FALSE
, /* pc_relative */
170 complain_overflow_bitfield
, /* complain_on_overflow */
171 special
, /* special_function */
172 "R_H8_DIR24R8", /* name */
173 TRUE
, /* partial_inplace */
174 0xff000000, /* src_mask */
175 0x00ffffff, /* dst_mask */
176 FALSE
), /* pcrel_offset */
177 #define R_H8_DIR32A16_X (R_H8_DIR24R8_X + 1)
178 HOWTO (R_H8_DIR32A16
, /* type */
180 2, /* size (0 = byte, 1 = short, 2 = long) */
182 FALSE
, /* pc_relative */
184 complain_overflow_dont
,/* complain_on_overflow */
185 special
, /* special_function */
186 "R_H8_DIR32", /* name */
187 FALSE
, /* partial_inplace */
189 0xffffffff, /* dst_mask */
190 FALSE
), /* pcrel_offset */
191 #define R_H8_PCREL16_X (R_H8_DIR32A16_X + 1)
192 HOWTO (R_H8_PCREL16
, /* type */
194 1, /* size (0 = byte, 1 = short, 2 = long) */
196 TRUE
, /* pc_relative */
198 complain_overflow_signed
,/* complain_on_overflow */
199 special
, /* special_function */
200 "R_H8_PCREL16", /* name */
201 FALSE
, /* partial_inplace */
202 0xffff, /* src_mask */
203 0xffff, /* dst_mask */
204 TRUE
), /* pcrel_offset */
205 #define R_H8_PCREL8_X (R_H8_PCREL16_X + 1)
206 HOWTO (R_H8_PCREL8
, /* type */
208 0, /* size (0 = byte, 1 = short, 2 = long) */
210 TRUE
, /* pc_relative */
212 complain_overflow_signed
,/* complain_on_overflow */
213 special
, /* special_function */
214 "R_H8_PCREL8", /* name */
215 FALSE
, /* partial_inplace */
218 TRUE
), /* pcrel_offset */
221 /* This structure is used to map BFD reloc codes to H8 ELF relocs. */
223 struct elf_reloc_map
{
224 bfd_reloc_code_real_type bfd_reloc_val
;
225 unsigned char howto_index
;
228 /* An array mapping BFD reloc codes to SH ELF relocs. */
230 static const struct elf_reloc_map h8_reloc_map
[] = {
231 { BFD_RELOC_NONE
, R_H8_NONE_X
},
232 { BFD_RELOC_32
, R_H8_DIR32_X
},
233 { BFD_RELOC_16
, R_H8_DIR16_X
},
234 { BFD_RELOC_8
, R_H8_DIR8_X
},
235 { BFD_RELOC_H8_DIR16A8
, R_H8_DIR16A8_X
},
236 { BFD_RELOC_H8_DIR16R8
, R_H8_DIR16R8_X
},
237 { BFD_RELOC_H8_DIR24A8
, R_H8_DIR24A8_X
},
238 { BFD_RELOC_H8_DIR24R8
, R_H8_DIR24R8_X
},
239 { BFD_RELOC_H8_DIR32A16
, R_H8_DIR32A16_X
},
240 { BFD_RELOC_16_PCREL
, R_H8_PCREL16_X
},
241 { BFD_RELOC_8_PCREL
, R_H8_PCREL8_X
},
245 static reloc_howto_type
*
246 elf32_h8_reloc_type_lookup (abfd
, code
)
247 bfd
*abfd ATTRIBUTE_UNUSED
;
248 bfd_reloc_code_real_type code
;
252 for (i
= 0; i
< sizeof (h8_reloc_map
) / sizeof (struct elf_reloc_map
); i
++)
254 if (h8_reloc_map
[i
].bfd_reloc_val
== code
)
255 return &h8_elf_howto_table
[(int) h8_reloc_map
[i
].howto_index
];
261 elf32_h8_info_to_howto (abfd
, bfd_reloc
, elf_reloc
)
262 bfd
*abfd ATTRIBUTE_UNUSED
;
264 Elf_Internal_Rela
*elf_reloc
;
269 r
= ELF32_R_TYPE (elf_reloc
->r_info
);
270 for (i
= 0; i
< sizeof (h8_elf_howto_table
) / sizeof (reloc_howto_type
); i
++)
271 if (h8_elf_howto_table
[i
].type
== r
)
273 bfd_reloc
->howto
= &h8_elf_howto_table
[i
];
280 elf32_h8_info_to_howto_rel (abfd
, bfd_reloc
, elf_reloc
)
281 bfd
*abfd ATTRIBUTE_UNUSED
;
283 Elf_Internal_Rela
*elf_reloc ATTRIBUTE_UNUSED
;
288 r
= ELF32_R_TYPE (elf_reloc
->r_info
);
289 bfd_reloc
->howto
= &h8_elf_howto_table
[r
];
292 /* Special handling for H8/300 relocs.
293 We only come here for pcrel stuff and return normally if not an -r link.
294 When doing -r, we can't do any arithmetic for the pcrel stuff, because
295 we support relaxing on the H8/300 series chips. */
296 static bfd_reloc_status_type
297 special (abfd
, reloc_entry
, symbol
, data
, input_section
, output_bfd
,
299 bfd
*abfd ATTRIBUTE_UNUSED
;
300 arelent
*reloc_entry ATTRIBUTE_UNUSED
;
301 asymbol
*symbol ATTRIBUTE_UNUSED
;
302 PTR data ATTRIBUTE_UNUSED
;
303 asection
*input_section ATTRIBUTE_UNUSED
;
305 char **error_message ATTRIBUTE_UNUSED
;
307 if (output_bfd
== (bfd
*) NULL
)
308 return bfd_reloc_continue
;
310 /* Adjust the reloc address to that in the output section. */
311 reloc_entry
->address
+= input_section
->output_offset
;
315 /* Perform a relocation as part of a final link. */
316 static bfd_reloc_status_type
317 elf32_h8_final_link_relocate (r_type
, input_bfd
, output_bfd
,
318 input_section
, contents
, offset
, value
,
319 addend
, info
, sym_sec
, is_local
)
320 unsigned long r_type
;
322 bfd
*output_bfd ATTRIBUTE_UNUSED
;
323 asection
*input_section ATTRIBUTE_UNUSED
;
328 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
329 asection
*sym_sec ATTRIBUTE_UNUSED
;
330 int is_local ATTRIBUTE_UNUSED
;
332 bfd_byte
*hit_data
= contents
+ offset
;
344 bfd_put_32 (input_bfd
, value
, hit_data
);
351 bfd_put_16 (input_bfd
, value
, hit_data
);
358 bfd_put_8 (input_bfd
, value
, hit_data
);
364 /* HIT_DATA is the address for the first byte for the relocated
365 value. Subtract 1 so that we can manipulate the data in 32bit
369 /* Clear out the top byte in value. */
372 /* Retrieve the type byte for value from the section contents. */
373 value
|= (bfd_get_32 (input_bfd
, hit_data
) & 0xff000000);
375 /* Now scribble it out in one 32bit hunk. */
376 bfd_put_32 (input_bfd
, value
, hit_data
);
380 value
-= (input_section
->output_section
->vma
381 + input_section
->output_offset
);
385 /* The value is relative to the start of the instruction,
386 not the relocation offset. Subtract 2 to account for
390 bfd_put_16 (input_bfd
, value
, hit_data
);
394 value
-= (input_section
->output_section
->vma
395 + input_section
->output_offset
);
399 /* The value is relative to the start of the instruction,
400 not the relocation offset. Subtract 1 to account for
404 bfd_put_8 (input_bfd
, value
, hit_data
);
408 return bfd_reloc_notsupported
;
412 /* Relocate an H8 ELF section. */
414 elf32_h8_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
415 contents
, relocs
, local_syms
, local_sections
)
417 struct bfd_link_info
*info
;
419 asection
*input_section
;
421 Elf_Internal_Rela
*relocs
;
422 Elf_Internal_Sym
*local_syms
;
423 asection
**local_sections
;
425 Elf_Internal_Shdr
*symtab_hdr
;
426 struct elf_link_hash_entry
**sym_hashes
;
427 Elf_Internal_Rela
*rel
, *relend
;
429 if (info
->relocateable
)
432 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
433 sym_hashes
= elf_sym_hashes (input_bfd
);
436 relend
= relocs
+ input_section
->reloc_count
;
437 for (; rel
< relend
; rel
++)
440 unsigned long r_symndx
;
441 Elf_Internal_Sym
*sym
;
443 struct elf_link_hash_entry
*h
;
445 bfd_reloc_status_type r
;
447 /* This is a final link. */
448 r_symndx
= ELF32_R_SYM (rel
->r_info
);
449 r_type
= ELF32_R_TYPE (rel
->r_info
);
453 if (r_symndx
< symtab_hdr
->sh_info
)
455 sym
= local_syms
+ r_symndx
;
456 sec
= local_sections
[r_symndx
];
457 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, sec
, rel
);
461 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
462 while (h
->root
.type
== bfd_link_hash_indirect
463 || h
->root
.type
== bfd_link_hash_warning
)
464 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
465 if (h
->root
.type
== bfd_link_hash_defined
466 || h
->root
.type
== bfd_link_hash_defweak
)
468 sec
= h
->root
.u
.def
.section
;
469 relocation
= (h
->root
.u
.def
.value
470 + sec
->output_section
->vma
471 + sec
->output_offset
);
473 else if (h
->root
.type
== bfd_link_hash_undefweak
)
477 if (! ((*info
->callbacks
->undefined_symbol
)
478 (info
, h
->root
.root
.string
, input_bfd
,
479 input_section
, rel
->r_offset
, TRUE
)))
485 r
= elf32_h8_final_link_relocate (r_type
, input_bfd
, output_bfd
,
487 contents
, rel
->r_offset
,
488 relocation
, rel
->r_addend
,
489 info
, sec
, h
== NULL
);
491 if (r
!= bfd_reloc_ok
)
494 const char *msg
= (const char *) 0;
496 reloc_howto_type
*howto
;
498 elf32_h8_info_to_howto (input_bfd
, &bfd_reloc
, rel
);
499 howto
= bfd_reloc
.howto
;
502 name
= h
->root
.root
.string
;
505 name
= (bfd_elf_string_from_elf_section
506 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
507 if (name
== NULL
|| *name
== '\0')
508 name
= bfd_section_name (input_bfd
, sec
);
513 case bfd_reloc_overflow
:
514 if (! ((*info
->callbacks
->reloc_overflow
)
515 (info
, name
, howto
->name
, (bfd_vma
) 0,
516 input_bfd
, input_section
, rel
->r_offset
)))
520 case bfd_reloc_undefined
:
521 if (! ((*info
->callbacks
->undefined_symbol
)
522 (info
, name
, input_bfd
, input_section
,
523 rel
->r_offset
, TRUE
)))
527 case bfd_reloc_outofrange
:
528 msg
= _("internal error: out of range error");
531 case bfd_reloc_notsupported
:
532 msg
= _("internal error: unsupported relocation error");
535 case bfd_reloc_dangerous
:
536 msg
= _("internal error: dangerous error");
540 msg
= _("internal error: unknown error");
544 if (!((*info
->callbacks
->warning
)
545 (info
, msg
, name
, input_bfd
, input_section
,
556 /* Object files encode the specific H8 model they were compiled
557 for in the ELF flags field.
559 Examine that field and return the proper BFD machine type for
562 elf32_h8_mach (flags
)
565 switch (flags
& EF_H8_MACH
)
567 case E_H8_MACH_H8300
:
569 return bfd_mach_h8300
;
571 case E_H8_MACH_H8300H
:
572 return bfd_mach_h8300h
;
574 case E_H8_MACH_H8300S
:
575 return bfd_mach_h8300s
;
577 case E_H8_MACH_H8300HN
:
578 return bfd_mach_h8300hn
;
580 case E_H8_MACH_H8300SN
:
581 return bfd_mach_h8300sn
;
585 /* The final processing done just before writing out a H8 ELF object
586 file. We use this opportunity to encode the BFD machine type
587 into the flags field in the object file. */
590 elf32_h8_final_write_processing (abfd
, linker
)
592 bfd_boolean linker ATTRIBUTE_UNUSED
;
596 switch (bfd_get_mach (abfd
))
600 val
= E_H8_MACH_H8300
;
603 case bfd_mach_h8300h
:
604 val
= E_H8_MACH_H8300H
;
607 case bfd_mach_h8300s
:
608 val
= E_H8_MACH_H8300S
;
611 case bfd_mach_h8300hn
:
612 val
= E_H8_MACH_H8300HN
;
615 case bfd_mach_h8300sn
:
616 val
= E_H8_MACH_H8300SN
;
620 elf_elfheader (abfd
)->e_flags
&= ~ (EF_H8_MACH
);
621 elf_elfheader (abfd
)->e_flags
|= val
;
624 /* Return nonzero if ABFD represents a valid H8 ELF object file; also
625 record the encoded machine type found in the ELF flags. */
628 elf32_h8_object_p (abfd
)
631 bfd_default_set_arch_mach (abfd
, bfd_arch_h8300
,
632 elf32_h8_mach (elf_elfheader (abfd
)->e_flags
));
636 /* Merge backend specific data from an object file to the output
637 object file when linking. The only data we need to copy at this
638 time is the architecture/machine information. */
641 elf32_h8_merge_private_bfd_data (ibfd
, obfd
)
645 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
646 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
649 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
650 && bfd_get_mach (obfd
) < bfd_get_mach (ibfd
))
652 if (! bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
),
653 bfd_get_mach (ibfd
)))
660 /* This function handles relaxing for the H8..
662 There's a few relaxing opportunites available on the H8:
664 jmp/jsr:24 -> bra/bsr:8 2 bytes
665 The jmp may be completely eliminated if the previous insn is a
666 conditional branch to the insn after the jump. In that case
667 we invert the branch and delete the jump and save 4 bytes.
669 bCC:16 -> bCC:8 2 bytes
670 bsr:16 -> bsr:8 2 bytes
672 mov.b:16 -> mov.b:8 2 bytes
673 mov.b:24/32 -> mov.b:8 4 bytes
675 mov.[bwl]:24/32 -> mov.[bwl]:16 2 bytes */
678 elf32_h8_relax_section (abfd
, sec
, link_info
, again
)
681 struct bfd_link_info
*link_info
;
684 Elf_Internal_Shdr
*symtab_hdr
;
685 Elf_Internal_Rela
*internal_relocs
;
686 Elf_Internal_Rela
*irel
, *irelend
;
687 bfd_byte
*contents
= NULL
;
688 Elf_Internal_Sym
*isymbuf
= NULL
;
689 static asection
*last_input_section
= NULL
;
690 static Elf_Internal_Rela
*last_reloc
= NULL
;
692 /* Assume nothing changes. */
695 /* We don't have to do anything for a relocateable link, if
696 this section does not have relocs, or if this is not a
698 if (link_info
->relocateable
699 || (sec
->flags
& SEC_RELOC
) == 0
700 || sec
->reloc_count
== 0
701 || (sec
->flags
& SEC_CODE
) == 0)
704 /* If this is the first time we have been called for this section,
705 initialize the cooked size. */
706 if (sec
->_cooked_size
== 0)
707 sec
->_cooked_size
= sec
->_raw_size
;
709 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
711 /* Get a copy of the native relocations. */
712 internal_relocs
= (_bfd_elf_link_read_relocs
713 (abfd
, sec
, (PTR
) NULL
, (Elf_Internal_Rela
*) NULL
,
714 link_info
->keep_memory
));
715 if (internal_relocs
== NULL
)
718 if (sec
!= last_input_section
)
721 last_input_section
= sec
;
723 /* Walk through the relocs looking for relaxing opportunities. */
724 irelend
= internal_relocs
+ sec
->reloc_count
;
725 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
729 /* Keep track of the previous reloc so that we can delete
730 some long jumps created by the compiler. */
731 if (irel
!= internal_relocs
)
732 last_reloc
= irel
- 1;
734 if (ELF32_R_TYPE (irel
->r_info
) != R_H8_DIR24R8
735 && ELF32_R_TYPE (irel
->r_info
) != R_H8_PCREL16
736 && ELF32_R_TYPE (irel
->r_info
) != R_H8_DIR16A8
737 && ELF32_R_TYPE (irel
->r_info
) != R_H8_DIR24A8
738 && ELF32_R_TYPE (irel
->r_info
) != R_H8_DIR32A16
)
741 /* Get the section contents if we haven't done so already. */
742 if (contents
== NULL
)
744 /* Get cached copy if it exists. */
745 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
746 contents
= elf_section_data (sec
)->this_hdr
.contents
;
749 /* Go get them off disk. */
750 contents
= (bfd_byte
*) bfd_malloc (sec
->_raw_size
);
751 if (contents
== NULL
)
754 if (! bfd_get_section_contents (abfd
, sec
, contents
,
755 (file_ptr
) 0, sec
->_raw_size
))
760 /* Read this BFD's local symbols if we haven't done so already. */
761 if (isymbuf
== NULL
&& symtab_hdr
->sh_info
!= 0)
763 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
765 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
766 symtab_hdr
->sh_info
, 0,
772 /* Get the value of the symbol referred to by the reloc. */
773 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
775 /* A local symbol. */
776 Elf_Internal_Sym
*isym
;
779 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
780 sym_sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
781 symval
= isym
->st_value
;
782 /* If the reloc is absolute, it will not have
783 a symbol or section associated with it. */
785 symval
+= sym_sec
->output_section
->vma
786 + sym_sec
->output_offset
;
791 struct elf_link_hash_entry
*h
;
793 /* An external symbol. */
794 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
795 h
= elf_sym_hashes (abfd
)[indx
];
796 BFD_ASSERT (h
!= NULL
);
797 if (h
->root
.type
!= bfd_link_hash_defined
798 && h
->root
.type
!= bfd_link_hash_defweak
)
800 /* This appears to be a reference to an undefined
801 symbol. Just ignore it--it will be caught by the
802 regular reloc processing. */
806 symval
= (h
->root
.u
.def
.value
807 + h
->root
.u
.def
.section
->output_section
->vma
808 + h
->root
.u
.def
.section
->output_offset
);
811 /* For simplicity of coding, we are going to modify the section
812 contents, the section relocs, and the BFD symbol table. We
813 must tell the rest of the code not to free up this
814 information. It would be possible to instead create a table
815 of changes which have to be made, as is done in coff-mips.c;
816 that would be more work, but would require less memory when
817 the linker is run. */
818 switch (ELF32_R_TYPE (irel
->r_info
))
820 /* Try to turn a 24 bit absolute branch/call into an 8 bit
821 pc-relative branch/call. */
824 bfd_vma value
= symval
+ irel
->r_addend
;
827 /* Get the address of this instruction. */
828 dot
= (sec
->output_section
->vma
829 + sec
->output_offset
+ irel
->r_offset
- 1);
831 /* Compute the distance from this insn to the branch target. */
834 /* If the distance is within -126..+130 inclusive, then we can
835 relax this jump. +130 is valid since the target will move
836 two bytes closer if we do relax this branch. */
837 if ((int) gap
>= -126 && (int) gap
<= 130)
841 /* Note that we've changed the relocs, section contents,
843 elf_section_data (sec
)->relocs
= internal_relocs
;
844 elf_section_data (sec
)->this_hdr
.contents
= contents
;
845 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
847 /* Get the instruction code being relaxed. */
848 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 1);
850 /* If the previous instruction conditionally jumped around
851 this instruction, we may be able to reverse the condition
852 and redirect the previous instruction to the target of
855 Such sequences are used by the compiler to deal with
856 long conditional branches.
858 Only perform this optimisation for jumps (code 0x5a) not
859 subroutine calls, as otherwise it could transform:
872 which changes the call (jsr) into a branch (bne). */
877 && ELF32_R_TYPE (last_reloc
->r_info
) == R_H8_PCREL8
878 && ELF32_R_SYM (last_reloc
->r_info
) < symtab_hdr
->sh_info
)
881 asection
*last_sym_sec
;
882 Elf_Internal_Sym
*last_sym
;
884 /* We will need to examine the symbol used by the
885 previous relocation. */
887 last_sym
= isymbuf
+ ELF32_R_SYM (last_reloc
->r_info
);
889 = bfd_section_from_elf_index (abfd
, last_sym
->st_shndx
);
890 last_value
= (last_sym
->st_value
891 + last_sym_sec
->output_section
->vma
892 + last_sym_sec
->output_offset
);
894 /* Verify that the previous relocation was for a
895 branch around this instruction and that no symbol
896 exists at the current location. */
897 if (last_value
== dot
+ 4
898 && last_reloc
->r_offset
+ 2 == irel
->r_offset
899 && ! elf32_h8_symbol_address_p (abfd
, sec
, dot
))
901 /* We can eliminate this jump. Twiddle the
902 previous relocation as necessary. */
904 = ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
905 ELF32_R_TYPE (R_H8_NONE
));
908 = ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
909 ELF32_R_TYPE (R_H8_PCREL8
));
910 last_reloc
->r_addend
= irel
->r_addend
;
912 code
= bfd_get_8 (abfd
,
913 contents
+ last_reloc
->r_offset
- 1);
917 contents
+ last_reloc
->r_offset
- 1);
919 /* Delete four bytes of data. */
920 if (!elf32_h8_relax_delete_bytes (abfd
, sec
,
931 bfd_put_8 (abfd
, 0x55, contents
+ irel
->r_offset
- 1);
932 else if (code
== 0x5a)
933 bfd_put_8 (abfd
, 0x40, contents
+ irel
->r_offset
- 1);
937 /* Fix the relocation's type. */
938 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
941 /* Delete two bytes of data. */
942 if (!elf32_h8_relax_delete_bytes (abfd
, sec
,
943 irel
->r_offset
+ 1, 2))
946 /* That will change things, so, we should relax again.
947 Note that this is not required, and it may be slow. */
953 /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
957 bfd_vma value
= symval
+ irel
->r_addend
;
961 /* Get the address of this instruction. */
962 dot
= (sec
->output_section
->vma
964 + irel
->r_offset
- 2);
968 /* If the distance is within -126..+130 inclusive, then we can
969 relax this jump. +130 is valid since the target will move
970 two bytes closer if we do relax this branch. */
971 if ((int) gap
>= -126 && (int) gap
<= 130)
975 /* Note that we've changed the relocs, section contents,
977 elf_section_data (sec
)->relocs
= internal_relocs
;
978 elf_section_data (sec
)->this_hdr
.contents
= contents
;
979 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
981 /* Get the opcode. */
982 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2);
986 /* bCC:16 -> bCC:8 */
987 /* Get the condition code from the original insn. */
988 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 1);
992 bfd_put_8 (abfd
, code
, contents
+ irel
->r_offset
- 2);
994 else if (code
== 0x5c)
995 bfd_put_8 (abfd
, 0x55, contents
+ irel
->r_offset
- 2);
999 /* Fix the relocation's type. */
1000 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1004 /* Delete two bytes of data. */
1005 if (!elf32_h8_relax_delete_bytes (abfd
, sec
,
1006 irel
->r_offset
+ 1, 2))
1009 /* That will change things, so, we should relax again.
1010 Note that this is not required, and it may be slow. */
1016 /* This is a 16 bit absolute address in a "mov.b" insn, which may
1017 become an 8 bit absolute address if its in the right range. */
1020 bfd_vma value
= symval
+ irel
->r_addend
;
1022 if ((bfd_get_mach (abfd
) == bfd_mach_h8300
1025 || ((bfd_get_mach (abfd
) == bfd_mach_h8300h
1026 || bfd_get_mach (abfd
) == bfd_mach_h8300s
)
1027 && value
>= 0xffff00
1028 && value
<= 0xffffff))
1032 /* Note that we've changed the relocs, section contents,
1034 elf_section_data (sec
)->relocs
= internal_relocs
;
1035 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1036 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
1038 /* Get the opcode. */
1039 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2);
1045 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 1);
1047 if ((code
& 0xf0) == 0x00)
1049 (code
& 0xf) | 0x20,
1050 contents
+ irel
->r_offset
- 2);
1051 else if ((code
& 0xf0) == 0x80)
1053 (code
& 0xf) | 0x30,
1054 contents
+ irel
->r_offset
- 2);
1058 /* Fix the relocation's type. */
1059 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1062 /* Delete two bytes of data. */
1063 if (!elf32_h8_relax_delete_bytes (abfd
, sec
,
1064 irel
->r_offset
+ 1, 2))
1067 /* That will change things, so, we should relax again.
1068 Note that this is not required, and it may be slow. */
1074 /* This is a 24 bit absolute address in a "mov.b" insn, which may
1075 become an 8 bit absolute address if its in the right range. */
1078 bfd_vma value
= symval
+ irel
->r_addend
;
1080 if ((bfd_get_mach (abfd
) == bfd_mach_h8300
1083 || ((bfd_get_mach (abfd
) == bfd_mach_h8300h
1084 || bfd_get_mach (abfd
) == bfd_mach_h8300s
)
1085 && value
>= 0xffff00
1086 && value
<= 0xffffff))
1088 bfd_boolean skip
= FALSE
;
1091 /* Note that we've changed the relocs, section contents,
1093 elf_section_data (sec
)->relocs
= internal_relocs
;
1094 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1095 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
1097 /* Get the opcode. */
1098 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2);
1104 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 1);
1106 switch (code
& 0xf0)
1109 bfd_put_8 (abfd
, (code
& 0xf) | 0x20,
1110 contents
+ irel
->r_offset
- 2);
1113 bfd_put_8 (abfd
, (code
& 0xf) | 0x30,
1114 contents
+ irel
->r_offset
- 2);
1118 /* Skip 32bit versions. */
1128 /* Fix the relocation's type. */
1129 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1132 /* Delete two bytes of data. */
1133 if (!elf32_h8_relax_delete_bytes (abfd
, sec
, irel
->r_offset
, 2))
1136 /* That will change things, so, we should relax again.
1137 Note that this is not required, and it may be slow. */
1144 /* This is a 24/32bit absolute address in a "mov" insn, which may
1145 become a 16bit absoulte address if it is in the right range. */
1148 bfd_vma value
= symval
+ irel
->r_addend
;
1150 if (value
<= 0x7fff || value
>= 0xff8000)
1154 /* Note that we've changed the relocs, section contents,
1156 elf_section_data (sec
)->relocs
= internal_relocs
;
1157 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1158 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
1160 /* Get the opcode. */
1161 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 1);
1163 /* We just need to turn off bit 0x20. */
1166 bfd_put_8 (abfd
, code
, contents
+ irel
->r_offset
- 1);
1168 /* Fix the relocation's type. */
1169 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1172 /* Delete two bytes of data. */
1173 if (!elf32_h8_relax_delete_bytes (abfd
, sec
,
1174 irel
->r_offset
+ 1, 2))
1177 /* That will change things, so, we should relax again.
1178 Note that this is not required, and it may be slow. */
1190 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
1192 if (! link_info
->keep_memory
)
1195 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
1198 if (contents
!= NULL
1199 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
1201 if (! link_info
->keep_memory
)
1205 /* Cache the section contents for elf_link_input_bfd. */
1206 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1210 if (internal_relocs
!= NULL
1211 && elf_section_data (sec
)->relocs
!= internal_relocs
)
1212 free (internal_relocs
);
1218 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
1220 if (contents
!= NULL
1221 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
1223 if (internal_relocs
!= NULL
1224 && elf_section_data (sec
)->relocs
!= internal_relocs
)
1225 free (internal_relocs
);
1229 /* Delete some bytes from a section while relaxing. */
1232 elf32_h8_relax_delete_bytes (abfd
, sec
, addr
, count
)
1238 Elf_Internal_Shdr
*symtab_hdr
;
1239 unsigned int sec_shndx
;
1241 Elf_Internal_Rela
*irel
, *irelend
;
1242 Elf_Internal_Rela
*irelalign
;
1243 Elf_Internal_Sym
*isym
;
1244 Elf_Internal_Sym
*isymend
;
1246 struct elf_link_hash_entry
**sym_hashes
;
1247 struct elf_link_hash_entry
**end_hashes
;
1248 unsigned int symcount
;
1250 sec_shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
1252 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1254 /* The deletion must stop at the next ALIGN reloc for an aligment
1255 power larger than the number of bytes we are deleting. */
1258 toaddr
= sec
->_cooked_size
;
1260 irel
= elf_section_data (sec
)->relocs
;
1261 irelend
= irel
+ sec
->reloc_count
;
1263 /* Actually delete the bytes. */
1264 memmove (contents
+ addr
, contents
+ addr
+ count
,
1265 (size_t) (toaddr
- addr
- count
));
1266 sec
->_cooked_size
-= count
;
1268 /* Adjust all the relocs. */
1269 for (irel
= elf_section_data (sec
)->relocs
; irel
< irelend
; irel
++)
1271 /* Get the new reloc address. */
1272 if ((irel
->r_offset
> addr
1273 && irel
->r_offset
< toaddr
))
1274 irel
->r_offset
-= count
;
1277 /* Adjust the local symbols defined in this section. */
1278 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1279 isym
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
1280 isymend
= isym
+ symtab_hdr
->sh_info
;
1281 for (; isym
< isymend
; isym
++)
1283 if (isym
->st_shndx
== sec_shndx
1284 && isym
->st_value
> addr
1285 && isym
->st_value
< toaddr
)
1286 isym
->st_value
-= count
;
1289 /* Now adjust the global symbols defined in this section. */
1290 symcount
= (symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
)
1291 - symtab_hdr
->sh_info
);
1292 sym_hashes
= elf_sym_hashes (abfd
);
1293 end_hashes
= sym_hashes
+ symcount
;
1294 for (; sym_hashes
< end_hashes
; sym_hashes
++)
1296 struct elf_link_hash_entry
*sym_hash
= *sym_hashes
;
1297 if ((sym_hash
->root
.type
== bfd_link_hash_defined
1298 || sym_hash
->root
.type
== bfd_link_hash_defweak
)
1299 && sym_hash
->root
.u
.def
.section
== sec
1300 && sym_hash
->root
.u
.def
.value
> addr
1301 && sym_hash
->root
.u
.def
.value
< toaddr
)
1303 sym_hash
->root
.u
.def
.value
-= count
;
1310 /* Return TRUE if a symbol exists at the given address, else return
1313 elf32_h8_symbol_address_p (abfd
, sec
, addr
)
1318 Elf_Internal_Shdr
*symtab_hdr
;
1319 unsigned int sec_shndx
;
1320 Elf_Internal_Sym
*isym
;
1321 Elf_Internal_Sym
*isymend
;
1322 struct elf_link_hash_entry
**sym_hashes
;
1323 struct elf_link_hash_entry
**end_hashes
;
1324 unsigned int symcount
;
1326 sec_shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
1328 /* Examine all the symbols. */
1329 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1330 isym
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
1331 isymend
= isym
+ symtab_hdr
->sh_info
;
1332 for (; isym
< isymend
; isym
++)
1334 if (isym
->st_shndx
== sec_shndx
1335 && isym
->st_value
== addr
)
1339 symcount
= (symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
)
1340 - symtab_hdr
->sh_info
);
1341 sym_hashes
= elf_sym_hashes (abfd
);
1342 end_hashes
= sym_hashes
+ symcount
;
1343 for (; sym_hashes
< end_hashes
; sym_hashes
++)
1345 struct elf_link_hash_entry
*sym_hash
= *sym_hashes
;
1346 if ((sym_hash
->root
.type
== bfd_link_hash_defined
1347 || sym_hash
->root
.type
== bfd_link_hash_defweak
)
1348 && sym_hash
->root
.u
.def
.section
== sec
1349 && sym_hash
->root
.u
.def
.value
== addr
)
1356 /* This is a version of bfd_generic_get_relocated_section_contents
1357 which uses elf32_h8_relocate_section. */
1360 elf32_h8_get_relocated_section_contents (output_bfd
, link_info
, link_order
,
1361 data
, relocateable
, symbols
)
1363 struct bfd_link_info
*link_info
;
1364 struct bfd_link_order
*link_order
;
1366 bfd_boolean relocateable
;
1369 Elf_Internal_Shdr
*symtab_hdr
;
1370 asection
*input_section
= link_order
->u
.indirect
.section
;
1371 bfd
*input_bfd
= input_section
->owner
;
1372 asection
**sections
= NULL
;
1373 Elf_Internal_Rela
*internal_relocs
= NULL
;
1374 Elf_Internal_Sym
*isymbuf
= NULL
;
1376 /* We only need to handle the case of relaxing, or of having a
1377 particular set of section contents, specially. */
1379 || elf_section_data (input_section
)->this_hdr
.contents
== NULL
)
1380 return bfd_generic_get_relocated_section_contents (output_bfd
, link_info
,
1385 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
1387 memcpy (data
, elf_section_data (input_section
)->this_hdr
.contents
,
1388 (size_t) input_section
->_raw_size
);
1390 if ((input_section
->flags
& SEC_RELOC
) != 0
1391 && input_section
->reloc_count
> 0)
1394 Elf_Internal_Sym
*isym
, *isymend
;
1397 internal_relocs
= (_bfd_elf_link_read_relocs
1398 (input_bfd
, input_section
, (PTR
) NULL
,
1399 (Elf_Internal_Rela
*) NULL
, FALSE
));
1400 if (internal_relocs
== NULL
)
1403 if (symtab_hdr
->sh_info
!= 0)
1405 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
1406 if (isymbuf
== NULL
)
1407 isymbuf
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
1408 symtab_hdr
->sh_info
, 0,
1410 if (isymbuf
== NULL
)
1414 amt
= symtab_hdr
->sh_info
;
1415 amt
*= sizeof (asection
*);
1416 sections
= (asection
**) bfd_malloc (amt
);
1417 if (sections
== NULL
&& amt
!= 0)
1420 isymend
= isymbuf
+ symtab_hdr
->sh_info
;
1421 for (isym
= isymbuf
, secpp
= sections
; isym
< isymend
; ++isym
, ++secpp
)
1425 if (isym
->st_shndx
== SHN_UNDEF
)
1426 isec
= bfd_und_section_ptr
;
1427 else if (isym
->st_shndx
== SHN_ABS
)
1428 isec
= bfd_abs_section_ptr
;
1429 else if (isym
->st_shndx
== SHN_COMMON
)
1430 isec
= bfd_com_section_ptr
;
1432 isec
= bfd_section_from_elf_index (input_bfd
, isym
->st_shndx
);
1437 if (! elf32_h8_relocate_section (output_bfd
, link_info
, input_bfd
,
1438 input_section
, data
, internal_relocs
,
1442 if (sections
!= NULL
)
1445 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
1447 if (elf_section_data (input_section
)->relocs
!= internal_relocs
)
1448 free (internal_relocs
);
1454 if (sections
!= NULL
)
1457 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
1459 if (internal_relocs
!= NULL
1460 && elf_section_data (input_section
)->relocs
!= internal_relocs
)
1461 free (internal_relocs
);
1466 #define TARGET_BIG_SYM bfd_elf32_h8300_vec
1467 #define TARGET_BIG_NAME "elf32-h8300"
1468 #define ELF_ARCH bfd_arch_h8300
1469 #define ELF_MACHINE_CODE EM_H8_300
1470 #define ELF_MAXPAGESIZE 0x1
1471 #define bfd_elf32_bfd_reloc_type_lookup elf32_h8_reloc_type_lookup
1472 #define elf_info_to_howto elf32_h8_info_to_howto
1473 #define elf_info_to_howto_rel elf32_h8_info_to_howto_rel
1475 /* So we can set/examine bits in e_flags to get the specific
1476 H8 architecture in use. */
1477 #define elf_backend_final_write_processing \
1478 elf32_h8_final_write_processing
1479 #define elf_backend_object_p \
1481 #define bfd_elf32_bfd_merge_private_bfd_data \
1482 elf32_h8_merge_private_bfd_data
1484 /* ??? when elf_backend_relocate_section is not defined, elf32-target.h
1485 defaults to using _bfd_generic_link_hash_table_create, but
1486 elflink.h:bfd_elf32_size_dynamic_sections uses
1487 dynobj = elf_hash_table (info)->dynobj;
1488 and thus requires an elf hash table. */
1489 #define bfd_elf32_bfd_link_hash_table_create _bfd_elf_link_hash_table_create
1491 /* Use an H8 specific linker, not the ELF generic linker. */
1492 #define elf_backend_relocate_section elf32_h8_relocate_section
1493 #define elf_backend_rela_normal 1
1495 /* And relaxing stuff. */
1496 #define bfd_elf32_bfd_relax_section elf32_h8_relax_section
1497 #define bfd_elf32_bfd_get_relocated_section_contents \
1498 elf32_h8_get_relocated_section_contents
1501 #include "elf32-target.h"