1 /* D10V-specific support for 32-bit ELF
2 Copyright 1996, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
4 Contributed by Martin Hunt (hunt@cygnus.com).
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
28 static reloc_howto_type
*bfd_elf32_bfd_reloc_type_lookup
29 PARAMS ((bfd
*abfd
, bfd_reloc_code_real_type code
));
30 static void d10v_info_to_howto_rel
31 PARAMS ((bfd
*, arelent
*, Elf_Internal_Rela
*));
32 static asection
* elf32_d10v_gc_mark_hook
33 PARAMS ((asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
34 struct elf_link_hash_entry
*, Elf_Internal_Sym
*));
35 static bfd_boolean elf32_d10v_gc_sweep_hook
36 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
37 const Elf_Internal_Rela
*));
38 static bfd_boolean elf32_d10v_check_relocs
39 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
40 const Elf_Internal_Rela
*));
41 static bfd_boolean elf32_d10v_relocate_section
42 PARAMS ((bfd
*, struct bfd_link_info
*, bfd
*, asection
*,
43 bfd_byte
*, Elf_Internal_Rela
*, Elf_Internal_Sym
*,
46 /* Use REL instead of RELA to save space. */
49 static reloc_howto_type elf_d10v_howto_table
[] =
51 /* This reloc does nothing. */
52 HOWTO (R_D10V_NONE
, /* type */
54 2, /* size (0 = byte, 1 = short, 2 = long) */
56 FALSE
, /* pc_relative */
58 complain_overflow_dont
, /* complain_on_overflow */
59 bfd_elf_generic_reloc
, /* special_function */
60 "R_D10V_NONE", /* name */
61 FALSE
, /* partial_inplace */
64 FALSE
), /* pcrel_offset */
66 /* An PC Relative 10-bit relocation, shifted by 2 */
68 HOWTO (R_D10V_10_PCREL_R
, /* type */
70 2, /* size (0 = byte, 1 = short, 2 = long) */
72 TRUE
, /* pc_relative */
74 complain_overflow_bitfield
, /* complain_on_overflow */
75 bfd_elf_generic_reloc
, /* special_function */
76 "R_D10V_10_PCREL_R", /* name */
77 FALSE
, /* partial_inplace */
80 TRUE
), /* pcrel_offset */
82 /* An PC Relative 10-bit relocation, shifted by 2 */
84 HOWTO (R_D10V_10_PCREL_L
, /* type */
86 2, /* size (0 = byte, 1 = short, 2 = long) */
88 TRUE
, /* pc_relative */
90 complain_overflow_bitfield
, /* complain_on_overflow */
91 bfd_elf_generic_reloc
, /* special_function */
92 "R_D10V_10_PCREL_L", /* name */
93 FALSE
, /* partial_inplace */
94 0x07f8000, /* src_mask */
95 0x07f8000, /* dst_mask */
96 TRUE
), /* pcrel_offset */
98 /* A 16 bit absolute relocation */
99 HOWTO (R_D10V_16
, /* type */
101 1, /* size (0 = byte, 1 = short, 2 = long) */
103 FALSE
, /* pc_relative */
105 complain_overflow_dont
, /* complain_on_overflow */
106 bfd_elf_generic_reloc
, /* special_function */
107 "R_D10V_16", /* name */
108 FALSE
, /* partial_inplace */
109 0xffff, /* src_mask */
110 0xffff, /* dst_mask */
111 FALSE
), /* pcrel_offset */
113 /* An 18 bit absolute relocation, right shifted 2 */
114 HOWTO (R_D10V_18
, /* type */
116 1, /* size (0 = byte, 1 = short, 2 = long) */
118 FALSE
, /* pc_relative */
120 complain_overflow_dont
, /* complain_on_overflow */
121 bfd_elf_generic_reloc
, /* special_function */
122 "R_D10V_18", /* name */
123 FALSE
, /* partial_inplace */
124 0xffff, /* src_mask */
125 0xffff, /* dst_mask */
126 FALSE
), /* pcrel_offset */
128 /* A relative 18 bit relocation, right shifted by 2 */
129 HOWTO (R_D10V_18_PCREL
, /* type */
131 2, /* size (0 = byte, 1 = short, 2 = long) */
133 TRUE
, /* pc_relative */
135 complain_overflow_bitfield
, /* complain_on_overflow */
136 bfd_elf_generic_reloc
, /* special_function */
137 "R_D10V_18_PCREL", /* name */
138 FALSE
, /* partial_inplace */
139 0xffff, /* src_mask */
140 0xffff, /* dst_mask */
141 TRUE
), /* pcrel_offset */
143 /* A 32 bit absolute relocation */
144 HOWTO (R_D10V_32
, /* type */
146 2, /* size (0 = byte, 1 = short, 2 = long) */
148 FALSE
, /* pc_relative */
150 complain_overflow_dont
, /* complain_on_overflow */
151 bfd_elf_generic_reloc
, /* special_function */
152 "R_D10V_32", /* name */
153 FALSE
, /* partial_inplace */
154 0xffffffff, /* src_mask */
155 0xffffffff, /* dst_mask */
156 FALSE
), /* pcrel_offset */
158 /* GNU extension to record C++ vtable hierarchy */
159 HOWTO (R_D10V_GNU_VTINHERIT
, /* type */
161 2, /* size (0 = byte, 1 = short, 2 = long) */
163 FALSE
, /* pc_relative */
165 complain_overflow_dont
, /* complain_on_overflow */
166 NULL
, /* special_function */
167 "R_D10V_GNU_VTINHERIT", /* name */
168 FALSE
, /* partial_inplace */
171 FALSE
), /* pcrel_offset */
173 /* GNU extension to record C++ vtable member usage */
174 HOWTO (R_D10V_GNU_VTENTRY
, /* type */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
178 FALSE
, /* pc_relative */
180 complain_overflow_dont
, /* complain_on_overflow */
181 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
182 "R_D10V_GNU_VTENTRY", /* name */
183 FALSE
, /* partial_inplace */
186 FALSE
), /* pcrel_offset */
189 /* Map BFD reloc types to D10V ELF reloc types. */
191 struct d10v_reloc_map
193 bfd_reloc_code_real_type bfd_reloc_val
;
194 unsigned char elf_reloc_val
;
197 static const struct d10v_reloc_map d10v_reloc_map
[] =
199 { BFD_RELOC_NONE
, R_D10V_NONE
, },
200 { BFD_RELOC_D10V_10_PCREL_R
, R_D10V_10_PCREL_R
},
201 { BFD_RELOC_D10V_10_PCREL_L
, R_D10V_10_PCREL_L
},
202 { BFD_RELOC_16
, R_D10V_16
},
203 { BFD_RELOC_D10V_18
, R_D10V_18
},
204 { BFD_RELOC_D10V_18_PCREL
, R_D10V_18_PCREL
},
205 { BFD_RELOC_32
, R_D10V_32
},
206 { BFD_RELOC_VTABLE_INHERIT
, R_D10V_GNU_VTINHERIT
},
207 { BFD_RELOC_VTABLE_ENTRY
, R_D10V_GNU_VTENTRY
},
210 static reloc_howto_type
*
211 bfd_elf32_bfd_reloc_type_lookup (abfd
, code
)
212 bfd
*abfd ATTRIBUTE_UNUSED
;
213 bfd_reloc_code_real_type code
;
218 i
< sizeof (d10v_reloc_map
) / sizeof (struct d10v_reloc_map
);
221 if (d10v_reloc_map
[i
].bfd_reloc_val
== code
)
222 return &elf_d10v_howto_table
[d10v_reloc_map
[i
].elf_reloc_val
];
228 /* Set the howto pointer for an D10V ELF reloc. */
231 d10v_info_to_howto_rel (abfd
, cache_ptr
, dst
)
232 bfd
*abfd ATTRIBUTE_UNUSED
;
234 Elf_Internal_Rela
*dst
;
238 r_type
= ELF32_R_TYPE (dst
->r_info
);
239 BFD_ASSERT (r_type
< (unsigned int) R_D10V_max
);
240 cache_ptr
->howto
= &elf_d10v_howto_table
[r_type
];
244 elf32_d10v_gc_mark_hook (sec
, info
, rel
, h
, sym
)
246 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
247 Elf_Internal_Rela
*rel
;
248 struct elf_link_hash_entry
*h
;
249 Elf_Internal_Sym
*sym
;
253 switch (ELF32_R_TYPE (rel
->r_info
))
255 case R_D10V_GNU_VTINHERIT
:
256 case R_D10V_GNU_VTENTRY
:
260 switch (h
->root
.type
)
262 case bfd_link_hash_defined
:
263 case bfd_link_hash_defweak
:
264 return h
->root
.u
.def
.section
;
266 case bfd_link_hash_common
:
267 return h
->root
.u
.c
.p
->section
;
275 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
281 elf32_d10v_gc_sweep_hook (abfd
, info
, sec
, relocs
)
282 bfd
*abfd ATTRIBUTE_UNUSED
;
283 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
284 asection
*sec ATTRIBUTE_UNUSED
;
285 const Elf_Internal_Rela
*relocs ATTRIBUTE_UNUSED
;
287 /* we don't use got and plt entries for d10v */
291 /* Look through the relocs for a section during the first phase.
292 Since we don't do .gots or .plts, we just need to consider the
293 virtual table relocs for gc. */
296 elf32_d10v_check_relocs (abfd
, info
, sec
, relocs
)
298 struct bfd_link_info
*info
;
300 const Elf_Internal_Rela
*relocs
;
302 Elf_Internal_Shdr
*symtab_hdr
;
303 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
304 const Elf_Internal_Rela
*rel
;
305 const Elf_Internal_Rela
*rel_end
;
307 if (info
->relocatable
)
310 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
311 sym_hashes
= elf_sym_hashes (abfd
);
312 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof (Elf32_External_Sym
);
313 if (!elf_bad_symtab (abfd
))
314 sym_hashes_end
-= symtab_hdr
->sh_info
;
316 rel_end
= relocs
+ sec
->reloc_count
;
317 for (rel
= relocs
; rel
< rel_end
; rel
++)
319 struct elf_link_hash_entry
*h
;
320 unsigned long r_symndx
;
322 r_symndx
= ELF32_R_SYM (rel
->r_info
);
323 if (r_symndx
< symtab_hdr
->sh_info
)
326 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
328 switch (ELF32_R_TYPE (rel
->r_info
))
330 /* This relocation describes the C++ object vtable hierarchy.
331 Reconstruct it for later use during GC. */
332 case R_D10V_GNU_VTINHERIT
:
333 if (!_bfd_elf32_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
337 /* This relocation describes which C++ vtable entries are actually
338 used. Record for later use during GC. */
339 case R_D10V_GNU_VTENTRY
:
340 if (!_bfd_elf32_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
349 /* Relocate a D10V ELF section. */
351 elf32_d10v_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
352 contents
, relocs
, local_syms
, local_sections
)
354 struct bfd_link_info
*info
;
356 asection
*input_section
;
358 Elf_Internal_Rela
*relocs
;
359 Elf_Internal_Sym
*local_syms
;
360 asection
**local_sections
;
362 Elf_Internal_Shdr
*symtab_hdr
;
363 struct elf_link_hash_entry
**sym_hashes
;
364 Elf_Internal_Rela
*rel
, *relend
;
367 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
368 sym_hashes
= elf_sym_hashes (input_bfd
);
371 relend
= relocs
+ input_section
->reloc_count
;
372 for (; rel
< relend
; rel
++)
375 reloc_howto_type
*howto
;
376 unsigned long r_symndx
;
377 Elf_Internal_Sym
*sym
;
379 struct elf_link_hash_entry
*h
;
381 bfd_reloc_status_type r
;
383 r_symndx
= ELF32_R_SYM (rel
->r_info
);
384 r_type
= ELF32_R_TYPE (rel
->r_info
);
386 if (r_type
== R_D10V_GNU_VTENTRY
387 || r_type
== R_D10V_GNU_VTINHERIT
)
390 howto
= elf_d10v_howto_table
+ r_type
;
392 if (info
->relocatable
)
394 /* This is a relocatable link. We don't have to change
395 anything, unless the reloc is against a section symbol,
396 in which case we have to adjust according to where the
397 section symbol winds up in the output section. */
398 if (r_symndx
< symtab_hdr
->sh_info
)
400 sym
= local_syms
+ r_symndx
;
401 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
403 sec
= local_sections
[r_symndx
];
404 rel
->r_addend
+= sec
->output_offset
+ sym
->st_value
;
411 /* This is a final link. */
415 if (r_symndx
< symtab_hdr
->sh_info
)
417 sym
= local_syms
+ r_symndx
;
418 sec
= local_sections
[r_symndx
];
419 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, sec
, rel
);
423 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
424 while (h
->root
.type
== bfd_link_hash_indirect
425 || h
->root
.type
== bfd_link_hash_warning
)
426 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
427 if (h
->root
.type
== bfd_link_hash_defined
428 || h
->root
.type
== bfd_link_hash_defweak
)
430 sec
= h
->root
.u
.def
.section
;
431 relocation
= (h
->root
.u
.def
.value
432 + sec
->output_section
->vma
433 + sec
->output_offset
);
435 else if (h
->root
.type
== bfd_link_hash_undefweak
)
439 if (!((*info
->callbacks
->undefined_symbol
)
440 (info
, h
->root
.root
.string
, input_bfd
,
441 input_section
, rel
->r_offset
, TRUE
)))
448 name
= h
->root
.root
.string
;
451 name
= (bfd_elf_string_from_elf_section
452 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
453 if (name
== NULL
|| *name
== '\0')
454 name
= bfd_section_name (input_bfd
, sec
);
457 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
458 contents
, rel
->r_offset
,
459 relocation
, rel
->r_addend
);
461 if (r
!= bfd_reloc_ok
)
463 const char * msg
= (const char *) 0;
467 case bfd_reloc_overflow
:
468 if (!((*info
->callbacks
->reloc_overflow
)
469 (info
, name
, howto
->name
, (bfd_vma
) 0,
470 input_bfd
, input_section
, rel
->r_offset
)))
474 case bfd_reloc_undefined
:
475 if (!((*info
->callbacks
->undefined_symbol
)
476 (info
, name
, input_bfd
, input_section
,
477 rel
->r_offset
, TRUE
)))
481 case bfd_reloc_outofrange
:
482 msg
= _("internal error: out of range error");
485 case bfd_reloc_notsupported
:
486 msg
= _("internal error: unsupported relocation error");
489 case bfd_reloc_dangerous
:
490 msg
= _("internal error: dangerous error");
494 msg
= _("internal error: unknown error");
498 if (!((*info
->callbacks
->warning
)
499 (info
, msg
, name
, input_bfd
, input_section
,
509 #define ELF_ARCH bfd_arch_d10v
510 #define ELF_MACHINE_CODE EM_D10V
511 #define ELF_MACHINE_ALT1 EM_CYGNUS_D10V
512 #define ELF_MAXPAGESIZE 0x1000
514 #define TARGET_BIG_SYM bfd_elf32_d10v_vec
515 #define TARGET_BIG_NAME "elf32-d10v"
517 #define elf_info_to_howto 0
518 #define elf_info_to_howto_rel d10v_info_to_howto_rel
519 #define elf_backend_object_p 0
520 #define elf_backend_final_write_processing 0
521 #define elf_backend_gc_mark_hook elf32_d10v_gc_mark_hook
522 #define elf_backend_gc_sweep_hook elf32_d10v_gc_sweep_hook
523 #define elf_backend_check_relocs elf32_d10v_check_relocs
524 #define elf_backend_relocate_section elf32_d10v_relocate_section
525 #define elf_backend_can_gc_sections 1
527 #include "elf32-target.h"