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
[] = {
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_DIR16", /* 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 Elf32_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 Elf32_Internal_Rel
*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
;
579 /* The final processing done just before writing out a H8 ELF object
580 file. We use this opportunity to encode the BFD machine type
581 into the flags field in the object file. */
584 elf32_h8_final_write_processing (abfd
, linker
)
586 boolean linker ATTRIBUTE_UNUSED
;
590 switch (bfd_get_mach (abfd
))
594 val
= E_H8_MACH_H8300
;
597 case bfd_mach_h8300h
:
598 val
= E_H8_MACH_H8300H
;
601 case bfd_mach_h8300s
:
602 val
= E_H8_MACH_H8300S
;
606 elf_elfheader (abfd
)->e_flags
&= ~ (EF_H8_MACH
);
607 elf_elfheader (abfd
)->e_flags
|= val
;
610 /* Return nonzero if ABFD represents a valid H8 ELF object file; also
611 record the encoded machine type found in the ELF flags. */
614 elf32_h8_object_p (abfd
)
617 bfd_default_set_arch_mach (abfd
, bfd_arch_h8300
,
618 elf32_h8_mach (elf_elfheader (abfd
)->e_flags
));
622 /* Merge backend specific data from an object file to the output
623 object file when linking. The only data we need to copy at this
624 time is the architecture/machine information. */
627 elf32_h8_merge_private_bfd_data (ibfd
, obfd
)
631 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
632 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
635 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
636 && bfd_get_mach (obfd
) < bfd_get_mach (ibfd
))
638 if (! bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
),
639 bfd_get_mach (ibfd
)))
646 /* This function handles relaxing for the H8..
648 There's a few relaxing opportunites available on the H8:
650 jmp/jsr:24 -> bra/bsr:8 2 bytes
651 The jmp may be completely eliminated if the previous insn is a
652 conditional branch to the insn after the jump. In that case
653 we invert the branch and delete the jump and save 4 bytes.
655 bCC:16 -> bCC:8 2 bytes
656 bsr:16 -> bsr:8 2 bytes
658 mov.b:16 -> mov.b:8 2 bytes
659 mov.b:24/32 -> mov.b:8 4 bytes
661 mov.[bwl]:24/32 -> mov.[bwl]:16 2 bytes */
664 elf32_h8_relax_section (abfd
, sec
, link_info
, again
)
667 struct bfd_link_info
*link_info
;
670 Elf_Internal_Shdr
*symtab_hdr
;
671 Elf_Internal_Rela
*internal_relocs
;
672 Elf_Internal_Rela
*irel
, *irelend
;
673 bfd_byte
*contents
= NULL
;
674 Elf_Internal_Sym
*isymbuf
= NULL
;
675 static asection
*last_input_section
= NULL
;
676 static Elf_Internal_Rela
*last_reloc
= NULL
;
678 /* Assume nothing changes. */
681 /* We don't have to do anything for a relocateable link, if
682 this section does not have relocs, or if this is not a
684 if (link_info
->relocateable
685 || (sec
->flags
& SEC_RELOC
) == 0
686 || sec
->reloc_count
== 0
687 || (sec
->flags
& SEC_CODE
) == 0)
690 /* If this is the first time we have been called for this section,
691 initialize the cooked size. */
692 if (sec
->_cooked_size
== 0)
693 sec
->_cooked_size
= sec
->_raw_size
;
695 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
697 /* Get a copy of the native relocations. */
698 internal_relocs
= (_bfd_elf32_link_read_relocs
699 (abfd
, sec
, (PTR
) NULL
, (Elf_Internal_Rela
*) NULL
,
700 link_info
->keep_memory
));
701 if (internal_relocs
== NULL
)
704 if (sec
!= last_input_section
)
707 last_input_section
= sec
;
709 /* Walk through the relocs looking for relaxing opportunities. */
710 irelend
= internal_relocs
+ sec
->reloc_count
;
711 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
715 /* Keep track of the previous reloc so that we can delete
716 some long jumps created by the compiler. */
717 if (irel
!= internal_relocs
)
718 last_reloc
= irel
- 1;
720 if (ELF32_R_TYPE (irel
->r_info
) != R_H8_DIR24R8
721 && ELF32_R_TYPE (irel
->r_info
) != R_H8_PCREL16
722 && ELF32_R_TYPE (irel
->r_info
) != R_H8_DIR16A8
723 && ELF32_R_TYPE (irel
->r_info
) != R_H8_DIR24A8
724 && ELF32_R_TYPE (irel
->r_info
) != R_H8_DIR32A16
)
727 /* Get the section contents if we haven't done so already. */
728 if (contents
== NULL
)
730 /* Get cached copy if it exists. */
731 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
732 contents
= elf_section_data (sec
)->this_hdr
.contents
;
735 /* Go get them off disk. */
736 contents
= (bfd_byte
*) bfd_malloc (sec
->_raw_size
);
737 if (contents
== NULL
)
740 if (! bfd_get_section_contents (abfd
, sec
, contents
,
741 (file_ptr
) 0, sec
->_raw_size
))
746 /* Read this BFD's local symbols if we haven't done so already. */
747 if (isymbuf
== NULL
&& symtab_hdr
->sh_info
!= 0)
749 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
751 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
752 symtab_hdr
->sh_info
, 0,
758 /* Get the value of the symbol referred to by the reloc. */
759 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
761 /* A local symbol. */
762 Elf_Internal_Sym
*isym
;
765 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
766 sym_sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
767 symval
= (isym
->st_value
768 + sym_sec
->output_section
->vma
769 + sym_sec
->output_offset
);
774 struct elf_link_hash_entry
*h
;
776 /* An external symbol. */
777 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
778 h
= elf_sym_hashes (abfd
)[indx
];
779 BFD_ASSERT (h
!= NULL
);
780 if (h
->root
.type
!= bfd_link_hash_defined
781 && h
->root
.type
!= bfd_link_hash_defweak
)
783 /* This appears to be a reference to an undefined
784 symbol. Just ignore it--it will be caught by the
785 regular reloc processing. */
789 symval
= (h
->root
.u
.def
.value
790 + h
->root
.u
.def
.section
->output_section
->vma
791 + h
->root
.u
.def
.section
->output_offset
);
794 /* For simplicity of coding, we are going to modify the section
795 contents, the section relocs, and the BFD symbol table. We
796 must tell the rest of the code not to free up this
797 information. It would be possible to instead create a table
798 of changes which have to be made, as is done in coff-mips.c;
799 that would be more work, but would require less memory when
800 the linker is run. */
801 switch (ELF32_R_TYPE (irel
->r_info
))
803 /* Try to turn a 24 bit absolute branch/call into an 8 bit
804 pc-relative branch/call. */
807 bfd_vma value
= symval
+ irel
->r_addend
;
810 /* Get the address of this instruction. */
811 dot
= (sec
->output_section
->vma
812 + sec
->output_offset
+ irel
->r_offset
- 1);
814 /* Compute the distance from this insn to the branch target. */
817 /* If the distance is within -126..+130 inclusive, then we can
818 relax this jump. +130 is valid since the target will move
819 two bytes closer if we do relax this branch. */
820 if ((int) gap
>= -126 && (int) gap
<= 130)
824 /* Note that we've changed the relocs, section contents,
826 elf_section_data (sec
)->relocs
= internal_relocs
;
827 elf_section_data (sec
)->this_hdr
.contents
= contents
;
828 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
830 /* If the previous instruction conditionally jumped around
831 this instruction, we may be able to reverse the condition
832 and redirect the previous instruction to the target of
835 Such sequences are used by the compiler to deal with
836 long conditional branches. */
840 && ELF32_R_TYPE (last_reloc
->r_info
) == R_H8_PCREL8
841 && ELF32_R_SYM (last_reloc
->r_info
) < symtab_hdr
->sh_info
)
844 asection
*last_sym_sec
;
845 Elf_Internal_Sym
*last_sym
;
847 /* We will need to examine the symbol used by the
848 previous relocation. */
850 last_sym
= isymbuf
+ ELF32_R_SYM (last_reloc
->r_info
);
852 = bfd_section_from_elf_index (abfd
, last_sym
->st_shndx
);
853 last_value
= (last_sym
->st_value
854 + last_sym_sec
->output_section
->vma
855 + last_sym_sec
->output_offset
);
857 /* Verify that the previous relocation was for a
858 branch around this instruction and that no symbol
859 exists at the current location. */
860 if (last_value
== dot
+ 4
861 && last_reloc
->r_offset
+ 2 == irel
->r_offset
862 && ! elf32_h8_symbol_address_p (abfd
, sec
, dot
))
864 /* We can eliminate this jump. Twiddle the
865 previous relocation as necessary. */
867 = ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
868 ELF32_R_TYPE (R_H8_NONE
));
871 = ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
872 ELF32_R_TYPE (R_H8_PCREL8
));
873 last_reloc
->r_addend
= irel
->r_addend
;
875 code
= bfd_get_8 (abfd
,
876 contents
+ last_reloc
->r_offset
- 1);
880 contents
+ last_reloc
->r_offset
- 1);
882 /* Delete four bytes of data. */
883 if (!elf32_h8_relax_delete_bytes (abfd
, sec
,
893 /* We could not eliminate this jump, so just shorten it. */
894 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 1);
897 bfd_put_8 (abfd
, 0x55, contents
+ irel
->r_offset
- 1);
898 else if (code
== 0x5a)
899 bfd_put_8 (abfd
, 0x40, contents
+ irel
->r_offset
- 1);
903 /* Fix the relocation's type. */
904 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
907 /* Delete two bytes of data. */
908 if (!elf32_h8_relax_delete_bytes (abfd
, sec
,
909 irel
->r_offset
+ 1, 2))
912 /* That will change things, so, we should relax again.
913 Note that this is not required, and it may be slow. */
919 /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
923 bfd_vma value
= symval
+ irel
->r_addend
;
927 /* Get the address of this instruction. */
928 dot
= (sec
->output_section
->vma
930 + irel
->r_offset
- 2);
934 /* If the distance is within -126..+130 inclusive, then we can
935 relax this jump. +130 is valid since the target will move
936 two bytes closer if we do relax this branch. */
937 if ((int) gap
>= -126 && (int) gap
<= 130)
941 /* Note that we've changed the relocs, section contents,
943 elf_section_data (sec
)->relocs
= internal_relocs
;
944 elf_section_data (sec
)->this_hdr
.contents
= contents
;
945 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
947 /* Get the opcode. */
948 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2);
952 /* bCC:16 -> bCC:8 */
953 /* Get the condition code from the original insn. */
954 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 1);
958 bfd_put_8 (abfd
, code
, contents
+ irel
->r_offset
- 2);
960 else if (code
== 0x5c)
961 bfd_put_8 (abfd
, 0x55, contents
+ irel
->r_offset
- 2);
965 /* Fix the relocation's type. */
966 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
970 /* Delete two bytes of data. */
971 if (!elf32_h8_relax_delete_bytes (abfd
, sec
,
972 irel
->r_offset
+ 1, 2))
975 /* That will change things, so, we should relax again.
976 Note that this is not required, and it may be slow. */
982 /* This is a 16 bit absolute address in a "mov.b" insn, which may
983 become an 8 bit absolute address if its in the right range. */
986 bfd_vma value
= symval
+ irel
->r_addend
;
988 if ((bfd_get_mach (abfd
) == bfd_mach_h8300
991 || ((bfd_get_mach (abfd
) == bfd_mach_h8300h
992 || bfd_get_mach (abfd
) == bfd_mach_h8300s
)
994 && value
<= 0xffffff))
998 /* Note that we've changed the relocs, section contents,
1000 elf_section_data (sec
)->relocs
= internal_relocs
;
1001 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1002 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
1004 /* Get the opcode. */
1005 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2);
1011 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 1);
1013 if ((code
& 0xf0) == 0x00)
1015 (code
& 0xf) | 0x20,
1016 contents
+ irel
->r_offset
- 2);
1017 else if ((code
& 0xf0) == 0x80)
1019 (code
& 0xf) | 0x30,
1020 contents
+ irel
->r_offset
- 2);
1024 /* Fix the relocation's type. */
1025 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1028 /* Delete two bytes of data. */
1029 if (!elf32_h8_relax_delete_bytes (abfd
, sec
,
1030 irel
->r_offset
+ 1, 2))
1033 /* That will change things, so, we should relax again.
1034 Note that this is not required, and it may be slow. */
1040 /* This is a 24 bit absolute address in a "mov.b" insn, which may
1041 become an 8 bit absolute address if its in the right range. */
1044 bfd_vma value
= symval
+ irel
->r_addend
;
1046 if ((bfd_get_mach (abfd
) == bfd_mach_h8300
1049 || ((bfd_get_mach (abfd
) == bfd_mach_h8300h
1050 || bfd_get_mach (abfd
) == bfd_mach_h8300s
)
1051 && value
>= 0xffff00
1052 && value
<= 0xffffff))
1056 /* Note that we've changed the relocs, section contents,
1058 elf_section_data (sec
)->relocs
= internal_relocs
;
1059 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1060 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
1062 /* Get the opcode. */
1063 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2);
1069 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 1);
1071 if ((code
& 0xf0) == 0x00)
1073 (code
& 0xf) | 0x20,
1074 contents
+ irel
->r_offset
- 2);
1075 else if ((code
& 0xf0) == 0x80)
1077 (code
& 0xf) | 0x30,
1078 contents
+ irel
->r_offset
- 2);
1082 /* Fix the relocation's type. */
1083 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1086 /* Delete two bytes of data. */
1087 if (!elf32_h8_relax_delete_bytes (abfd
, sec
, irel
->r_offset
, 2))
1090 /* That will change things, so, we should relax again.
1091 Note that this is not required, and it may be slow. */
1098 /* This is a 24/32bit absolute address in a "mov" insn, which may
1099 become a 16bit absoulte address if it is in the right range. */
1102 bfd_vma value
= symval
+ irel
->r_addend
;
1104 if (value
<= 0x7fff || value
>= 0xff8000)
1108 /* Note that we've changed the relocs, section contents,
1110 elf_section_data (sec
)->relocs
= internal_relocs
;
1111 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1112 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
1114 /* Get the opcode. */
1115 code
= bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 1);
1117 /* We just need to turn off bit 0x20. */
1120 bfd_put_8 (abfd
, code
, contents
+ irel
->r_offset
- 1);
1122 /* Fix the relocation's type. */
1123 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1126 /* Delete two bytes of data. */
1127 if (!elf32_h8_relax_delete_bytes (abfd
, sec
,
1128 irel
->r_offset
+ 1, 2))
1131 /* That will change things, so, we should relax again.
1132 Note that this is not required, and it may be slow. */
1144 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
1146 if (! link_info
->keep_memory
)
1149 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
1152 if (contents
!= NULL
1153 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
1155 if (! link_info
->keep_memory
)
1159 /* Cache the section contents for elf_link_input_bfd. */
1160 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1164 if (internal_relocs
!= NULL
1165 && elf_section_data (sec
)->relocs
!= internal_relocs
)
1166 free (internal_relocs
);
1172 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
1174 if (contents
!= NULL
1175 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
1177 if (internal_relocs
!= NULL
1178 && elf_section_data (sec
)->relocs
!= internal_relocs
)
1179 free (internal_relocs
);
1183 /* Delete some bytes from a section while relaxing. */
1186 elf32_h8_relax_delete_bytes (abfd
, sec
, addr
, count
)
1192 Elf_Internal_Shdr
*symtab_hdr
;
1193 unsigned int sec_shndx
;
1195 Elf_Internal_Rela
*irel
, *irelend
;
1196 Elf_Internal_Rela
*irelalign
;
1197 Elf_Internal_Sym
*isym
;
1198 Elf_Internal_Sym
*isymend
;
1200 struct elf_link_hash_entry
**sym_hashes
;
1201 struct elf_link_hash_entry
**end_hashes
;
1202 unsigned int symcount
;
1204 sec_shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
1206 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1208 /* The deletion must stop at the next ALIGN reloc for an aligment
1209 power larger than the number of bytes we are deleting. */
1212 toaddr
= sec
->_cooked_size
;
1214 irel
= elf_section_data (sec
)->relocs
;
1215 irelend
= irel
+ sec
->reloc_count
;
1217 /* Actually delete the bytes. */
1218 memmove (contents
+ addr
, contents
+ addr
+ count
,
1219 (size_t) (toaddr
- addr
- count
));
1220 sec
->_cooked_size
-= count
;
1222 /* Adjust all the relocs. */
1223 for (irel
= elf_section_data (sec
)->relocs
; irel
< irelend
; irel
++)
1225 /* Get the new reloc address. */
1226 if ((irel
->r_offset
> addr
1227 && irel
->r_offset
< toaddr
))
1228 irel
->r_offset
-= count
;
1231 /* Adjust the local symbols defined in this section. */
1232 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1233 isym
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
1234 isymend
= isym
+ symtab_hdr
->sh_info
;
1235 for (; isym
< isymend
; isym
++)
1237 if (isym
->st_shndx
== sec_shndx
1238 && isym
->st_value
> addr
1239 && isym
->st_value
< toaddr
)
1240 isym
->st_value
-= count
;
1243 /* Now adjust the global symbols defined in this section. */
1244 symcount
= (symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
)
1245 - symtab_hdr
->sh_info
);
1246 sym_hashes
= elf_sym_hashes (abfd
);
1247 end_hashes
= sym_hashes
+ symcount
;
1248 for (; sym_hashes
< end_hashes
; sym_hashes
++)
1250 struct elf_link_hash_entry
*sym_hash
= *sym_hashes
;
1251 if ((sym_hash
->root
.type
== bfd_link_hash_defined
1252 || sym_hash
->root
.type
== bfd_link_hash_defweak
)
1253 && sym_hash
->root
.u
.def
.section
== sec
1254 && sym_hash
->root
.u
.def
.value
> addr
1255 && sym_hash
->root
.u
.def
.value
< toaddr
)
1257 sym_hash
->root
.u
.def
.value
-= count
;
1264 /* Return true if a symbol exists at the given address, else return
1267 elf32_h8_symbol_address_p (abfd
, sec
, addr
)
1272 Elf_Internal_Shdr
*symtab_hdr
;
1273 unsigned int sec_shndx
;
1274 Elf_Internal_Sym
*isym
;
1275 Elf_Internal_Sym
*isymend
;
1276 struct elf_link_hash_entry
**sym_hashes
;
1277 struct elf_link_hash_entry
**end_hashes
;
1278 unsigned int symcount
;
1280 sec_shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
1282 /* Examine all the symbols. */
1283 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1284 isym
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
1285 isymend
= isym
+ symtab_hdr
->sh_info
;
1286 for (; isym
< isymend
; isym
++)
1288 if (isym
->st_shndx
== sec_shndx
1289 && isym
->st_value
== addr
)
1293 symcount
= (symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
)
1294 - symtab_hdr
->sh_info
);
1295 sym_hashes
= elf_sym_hashes (abfd
);
1296 end_hashes
= sym_hashes
+ symcount
;
1297 for (; sym_hashes
< end_hashes
; sym_hashes
++)
1299 struct elf_link_hash_entry
*sym_hash
= *sym_hashes
;
1300 if ((sym_hash
->root
.type
== bfd_link_hash_defined
1301 || sym_hash
->root
.type
== bfd_link_hash_defweak
)
1302 && sym_hash
->root
.u
.def
.section
== sec
1303 && sym_hash
->root
.u
.def
.value
== addr
)
1310 /* This is a version of bfd_generic_get_relocated_section_contents
1311 which uses elf32_h8_relocate_section. */
1314 elf32_h8_get_relocated_section_contents (output_bfd
, link_info
, link_order
,
1315 data
, relocateable
, symbols
)
1317 struct bfd_link_info
*link_info
;
1318 struct bfd_link_order
*link_order
;
1320 boolean relocateable
;
1323 Elf_Internal_Shdr
*symtab_hdr
;
1324 asection
*input_section
= link_order
->u
.indirect
.section
;
1325 bfd
*input_bfd
= input_section
->owner
;
1326 asection
**sections
= NULL
;
1327 Elf_Internal_Rela
*internal_relocs
= NULL
;
1328 Elf_Internal_Sym
*isymbuf
= NULL
;
1330 /* We only need to handle the case of relaxing, or of having a
1331 particular set of section contents, specially. */
1333 || elf_section_data (input_section
)->this_hdr
.contents
== NULL
)
1334 return bfd_generic_get_relocated_section_contents (output_bfd
, link_info
,
1339 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
1341 memcpy (data
, elf_section_data (input_section
)->this_hdr
.contents
,
1342 (size_t) input_section
->_raw_size
);
1344 if ((input_section
->flags
& SEC_RELOC
) != 0
1345 && input_section
->reloc_count
> 0)
1348 Elf_Internal_Sym
*isym
, *isymend
;
1351 internal_relocs
= (_bfd_elf32_link_read_relocs
1352 (input_bfd
, input_section
, (PTR
) NULL
,
1353 (Elf_Internal_Rela
*) NULL
, false));
1354 if (internal_relocs
== NULL
)
1357 if (symtab_hdr
->sh_info
!= 0)
1359 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
1360 if (isymbuf
== NULL
)
1361 isymbuf
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
1362 symtab_hdr
->sh_info
, 0,
1364 if (isymbuf
== NULL
)
1368 amt
= symtab_hdr
->sh_info
;
1369 amt
*= sizeof (asection
*);
1370 sections
= (asection
**) bfd_malloc (amt
);
1371 if (sections
== NULL
&& amt
!= 0)
1374 isymend
= isymbuf
+ symtab_hdr
->sh_info
;
1375 for (isym
= isymbuf
, secpp
= sections
; isym
< isymend
; ++isym
, ++secpp
)
1379 if (isym
->st_shndx
== SHN_UNDEF
)
1380 isec
= bfd_und_section_ptr
;
1381 else if (isym
->st_shndx
== SHN_ABS
)
1382 isec
= bfd_abs_section_ptr
;
1383 else if (isym
->st_shndx
== SHN_COMMON
)
1384 isec
= bfd_com_section_ptr
;
1386 isec
= bfd_section_from_elf_index (input_bfd
, isym
->st_shndx
);
1391 if (! elf32_h8_relocate_section (output_bfd
, link_info
, input_bfd
,
1392 input_section
, data
, internal_relocs
,
1396 if (sections
!= NULL
)
1399 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
1401 if (elf_section_data (input_section
)->relocs
!= internal_relocs
)
1402 free (internal_relocs
);
1408 if (sections
!= NULL
)
1411 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
1413 if (internal_relocs
!= NULL
1414 && elf_section_data (input_section
)->relocs
!= internal_relocs
)
1415 free (internal_relocs
);
1420 #define TARGET_BIG_SYM bfd_elf32_h8300_vec
1421 #define TARGET_BIG_NAME "elf32-h8300"
1422 #define ELF_ARCH bfd_arch_h8300
1423 #define ELF_MACHINE_CODE EM_H8_300
1424 #define ELF_MAXPAGESIZE 0x1
1425 #define bfd_elf32_bfd_reloc_type_lookup elf32_h8_reloc_type_lookup
1426 #define elf_info_to_howto elf32_h8_info_to_howto
1427 #define elf_info_to_howto_rel elf32_h8_info_to_howto_rel
1429 /* So we can set/examine bits in e_flags to get the specific
1430 H8 architecture in use. */
1431 #define elf_backend_final_write_processing \
1432 elf32_h8_final_write_processing
1433 #define elf_backend_object_p \
1435 #define bfd_elf32_bfd_merge_private_bfd_data \
1436 elf32_h8_merge_private_bfd_data
1438 /* ??? when elf_backend_relocate_section is not defined, elf32-target.h
1439 defaults to using _bfd_generic_link_hash_table_create, but
1440 elflink.h:bfd_elf32_size_dynamic_sections uses
1441 dynobj = elf_hash_table (info)->dynobj;
1442 and thus requires an elf hash table. */
1443 #define bfd_elf32_bfd_link_hash_table_create _bfd_elf_link_hash_table_create
1445 /* Use an H8 specific linker, not the ELF generic linker. */
1446 #define elf_backend_relocate_section elf32_h8_relocate_section
1447 #define elf_backend_rela_normal 1
1449 /* And relaxing stuff. */
1450 #define bfd_elf32_bfd_relax_section elf32_h8_relax_section
1451 #define bfd_elf32_bfd_get_relocated_section_contents \
1452 elf32_h8_get_relocated_section_contents
1455 #include "elf32-target.h"