1 /* V850-specific support for 32-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001
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. */
21 /* XXX FIXME: This code is littered with 32bit int, 16bit short, 8bit char
22 dependencies. As is the gas & simulator code or the v850. */
30 #include "libiberty.h"
32 /* Sign-extend a 24-bit number. */
33 #define SEXT24(x) ((((x) & 0xffffff) ^ (~ 0x7fffff)) + 0x800000)
35 static reloc_howto_type *v850_elf_reloc_type_lookup
36 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
37 static void v850_elf_info_to_howto_rel
38 PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
39 static void v850_elf_info_to_howto_rela
40 PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
41 static bfd_reloc_status_type v850_elf_reloc
42 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
43 static boolean v850_elf_is_local_label_name
44 PARAMS ((bfd *, const char *));
45 static boolean v850_elf_relocate_section
46 PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
47 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
48 static bfd_reloc_status_type v850_elf_perform_relocation
49 PARAMS ((bfd *, int, bfd_vma, bfd_byte *));
50 static boolean v850_elf_check_relocs
51 PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *));
52 static void remember_hi16s_reloc
53 PARAMS ((bfd *, bfd_vma, bfd_byte *));
54 static bfd_byte * find_remembered_hi16s_reloc
55 PARAMS ((bfd_vma, boolean *));
56 static bfd_reloc_status_type v850_elf_final_link_relocate
57 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, bfd_vma,
58 bfd_vma, bfd_vma, struct bfd_link_info *, asection *, int));
59 static boolean v850_elf_object_p
61 static boolean v850_elf_fake_sections
62 PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *));
63 static void v850_elf_final_write_processing
64 PARAMS ((bfd *, boolean));
65 static boolean v850_elf_set_private_flags
66 PARAMS ((bfd *, flagword));
67 static boolean v850_elf_copy_private_bfd_data
68 PARAMS ((bfd *, bfd *));
69 static boolean v850_elf_merge_private_bfd_data
70 PARAMS ((bfd *, bfd *));
71 static boolean v850_elf_print_private_bfd_data
72 PARAMS ((bfd *, PTR));
73 static boolean v850_elf_section_from_bfd_section
74 PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *));
75 static void v850_elf_symbol_processing
76 PARAMS ((bfd *, asymbol *));
77 static boolean v850_elf_add_symbol_hook
78 PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
79 const char **, flagword *, asection **, bfd_vma *));
80 static boolean v850_elf_link_output_symbol_hook
81 PARAMS ((bfd *, struct bfd_link_info *, const char *,
82 Elf_Internal_Sym *, asection *));
83 static boolean v850_elf_section_from_shdr
84 PARAMS ((bfd *, Elf_Internal_Shdr *, char *));
85 static boolean v850_elf_gc_sweep_hook
86 PARAMS ((bfd *, struct bfd_link_info *, asection *,
87 const Elf_Internal_Rela *));
88 static asection * v850_elf_gc_mark_hook
89 PARAMS ((bfd *, struct bfd_link_info *,
90 Elf_Internal_Rela *, struct elf_link_hash_entry *,
93 /* Note: It is REQUIRED that the 'type' value of each entry
94 in this array match the index of the entry in the array. */
95 static reloc_howto_type v850_elf_howto_table[] =
97 /* This reloc does nothing. */
98 HOWTO (R_V850_NONE, /* type */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
102 false, /* pc_relative */
104 complain_overflow_bitfield, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_V850_NONE", /* name */
107 false, /* partial_inplace */
110 false), /* pcrel_offset */
112 /* A PC relative 9 bit branch. */
113 HOWTO (R_V850_9_PCREL, /* type */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
117 true, /* pc_relative */
119 complain_overflow_bitfield, /* complain_on_overflow */
120 v850_elf_reloc, /* special_function */
121 "R_V850_9_PCREL", /* name */
122 false, /* partial_inplace */
123 0x00ffffff, /* src_mask */
124 0x00ffffff, /* dst_mask */
125 true), /* pcrel_offset */
127 /* A PC relative 22 bit branch. */
128 HOWTO (R_V850_22_PCREL, /* type */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
132 true, /* pc_relative */
134 complain_overflow_signed, /* complain_on_overflow */
135 v850_elf_reloc, /* special_function */
136 "R_V850_22_PCREL", /* name */
137 false, /* partial_inplace */
138 0x07ffff80, /* src_mask */
139 0x07ffff80, /* dst_mask */
140 true), /* pcrel_offset */
142 /* High 16 bits of symbol value. */
143 HOWTO (R_V850_HI16_S, /* type */
145 1, /* size (0 = byte, 1 = short, 2 = long) */
147 false, /* pc_relative */
149 complain_overflow_dont, /* complain_on_overflow */
150 v850_elf_reloc, /* special_function */
151 "R_V850_HI16_S", /* name */
152 false, /* partial_inplace */
153 0xffff, /* src_mask */
154 0xffff, /* dst_mask */
155 false), /* pcrel_offset */
157 /* High 16 bits of symbol value. */
158 HOWTO (R_V850_HI16, /* type */
160 1, /* size (0 = byte, 1 = short, 2 = long) */
162 false, /* pc_relative */
164 complain_overflow_dont, /* complain_on_overflow */
165 v850_elf_reloc, /* special_function */
166 "R_V850_HI16", /* name */
167 false, /* partial_inplace */
168 0xffff, /* src_mask */
169 0xffff, /* dst_mask */
170 false), /* pcrel_offset */
172 /* Low 16 bits of symbol value. */
173 HOWTO (R_V850_LO16, /* type */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
177 false, /* pc_relative */
179 complain_overflow_dont, /* complain_on_overflow */
180 v850_elf_reloc, /* special_function */
181 "R_V850_LO16", /* name */
182 false, /* partial_inplace */
183 0xffff, /* src_mask */
184 0xffff, /* dst_mask */
185 false), /* pcrel_offset */
187 /* Simple 32bit reloc. */
188 HOWTO (R_V850_32, /* type */
190 2, /* size (0 = byte, 1 = short, 2 = long) */
192 false, /* pc_relative */
194 complain_overflow_dont, /* complain_on_overflow */
195 v850_elf_reloc, /* special_function */
196 "R_V850_32", /* name */
197 false, /* partial_inplace */
198 0xffffffff, /* src_mask */
199 0xffffffff, /* dst_mask */
200 false), /* pcrel_offset */
202 /* Simple 16bit reloc. */
203 HOWTO (R_V850_16, /* type */
205 1, /* size (0 = byte, 1 = short, 2 = long) */
207 false, /* pc_relative */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_V850_16", /* name */
212 false, /* partial_inplace */
213 0xffff, /* src_mask */
214 0xffff, /* dst_mask */
215 false), /* pcrel_offset */
217 /* Simple 8bit reloc. */
218 HOWTO (R_V850_8, /* type */
220 0, /* size (0 = byte, 1 = short, 2 = long) */
222 false, /* pc_relative */
224 complain_overflow_dont, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_V850_8", /* name */
227 false, /* partial_inplace */
230 false), /* pcrel_offset */
232 /* 16 bit offset from the short data area pointer. */
233 HOWTO (R_V850_SDA_16_16_OFFSET, /* type */
235 1, /* size (0 = byte, 1 = short, 2 = long) */
237 false, /* pc_relative */
239 complain_overflow_dont, /* complain_on_overflow */
240 v850_elf_reloc, /* special_function */
241 "R_V850_SDA_16_16_OFFSET", /* name */
242 false, /* partial_inplace */
243 0xffff, /* src_mask */
244 0xffff, /* dst_mask */
245 false), /* pcrel_offset */
247 /* 15 bit offset from the short data area pointer. */
248 HOWTO (R_V850_SDA_15_16_OFFSET, /* type */
250 1, /* size (0 = byte, 1 = short, 2 = long) */
252 false, /* pc_relative */
254 complain_overflow_dont, /* complain_on_overflow */
255 v850_elf_reloc, /* special_function */
256 "R_V850_SDA_15_16_OFFSET", /* name */
257 false, /* partial_inplace */
258 0xfffe, /* src_mask */
259 0xfffe, /* dst_mask */
260 false), /* pcrel_offset */
262 /* 16 bit offset from the zero data area pointer. */
263 HOWTO (R_V850_ZDA_16_16_OFFSET, /* type */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
267 false, /* pc_relative */
269 complain_overflow_dont, /* complain_on_overflow */
270 v850_elf_reloc, /* special_function */
271 "R_V850_ZDA_16_16_OFFSET", /* name */
272 false, /* partial_inplace */
273 0xffff, /* src_mask */
274 0xffff, /* dst_mask */
275 false), /* pcrel_offset */
277 /* 15 bit offset from the zero data area pointer. */
278 HOWTO (R_V850_ZDA_15_16_OFFSET, /* type */
280 1, /* size (0 = byte, 1 = short, 2 = long) */
282 false, /* pc_relative */
284 complain_overflow_dont, /* complain_on_overflow */
285 v850_elf_reloc, /* special_function */
286 "R_V850_ZDA_15_16_OFFSET", /* name */
287 false, /* partial_inplace */
288 0xfffe, /* src_mask */
289 0xfffe, /* dst_mask */
290 false), /* pcrel_offset */
292 /* 6 bit offset from the tiny data area pointer. */
293 HOWTO (R_V850_TDA_6_8_OFFSET, /* type */
295 1, /* size (0 = byte, 1 = short, 2 = long) */
297 false, /* pc_relative */
299 complain_overflow_dont, /* complain_on_overflow */
300 v850_elf_reloc, /* special_function */
301 "R_V850_TDA_6_8_OFFSET", /* name */
302 false, /* partial_inplace */
305 false), /* pcrel_offset */
307 /* 8 bit offset from the tiny data area pointer. */
308 HOWTO (R_V850_TDA_7_8_OFFSET, /* type */
310 1, /* size (0 = byte, 1 = short, 2 = long) */
312 false, /* pc_relative */
314 complain_overflow_dont, /* complain_on_overflow */
315 v850_elf_reloc, /* special_function */
316 "R_V850_TDA_7_8_OFFSET", /* name */
317 false, /* partial_inplace */
320 false), /* pcrel_offset */
322 /* 7 bit offset from the tiny data area pointer. */
323 HOWTO (R_V850_TDA_7_7_OFFSET, /* type */
325 1, /* size (0 = byte, 1 = short, 2 = long) */
327 false, /* pc_relative */
329 complain_overflow_dont, /* complain_on_overflow */
330 v850_elf_reloc, /* special_function */
331 "R_V850_TDA_7_7_OFFSET", /* name */
332 false, /* partial_inplace */
335 false), /* pcrel_offset */
337 /* 16 bit offset from the tiny data area pointer! */
338 HOWTO (R_V850_TDA_16_16_OFFSET, /* type */
340 1, /* size (0 = byte, 1 = short, 2 = long) */
342 false, /* pc_relative */
344 complain_overflow_dont, /* complain_on_overflow */
345 v850_elf_reloc, /* special_function */
346 "R_V850_TDA_16_16_OFFSET", /* name */
347 false, /* partial_inplace */
348 0xffff, /* src_mask */
349 0xfff, /* dst_mask */
350 false), /* pcrel_offset */
352 /* 5 bit offset from the tiny data area pointer. */
353 HOWTO (R_V850_TDA_4_5_OFFSET, /* type */
355 1, /* size (0 = byte, 1 = short, 2 = long) */
357 false, /* pc_relative */
359 complain_overflow_dont, /* complain_on_overflow */
360 v850_elf_reloc, /* special_function */
361 "R_V850_TDA_4_5_OFFSET", /* name */
362 false, /* partial_inplace */
365 false), /* pcrel_offset */
367 /* 4 bit offset from the tiny data area pointer. */
368 HOWTO (R_V850_TDA_4_4_OFFSET, /* type */
370 1, /* size (0 = byte, 1 = short, 2 = long) */
372 false, /* pc_relative */
374 complain_overflow_dont, /* complain_on_overflow */
375 v850_elf_reloc, /* special_function */
376 "R_V850_TDA_4_4_OFFSET", /* name */
377 false, /* partial_inplace */
380 false), /* pcrel_offset */
382 /* 16 bit offset from the short data area pointer. */
383 HOWTO (R_V850_SDA_16_16_SPLIT_OFFSET, /* type */
385 2, /* size (0 = byte, 1 = short, 2 = long) */
387 false, /* pc_relative */
389 complain_overflow_dont, /* complain_on_overflow */
390 v850_elf_reloc, /* special_function */
391 "R_V850_SDA_16_16_SPLIT_OFFSET",/* name */
392 false, /* partial_inplace */
393 0xfffe0020, /* src_mask */
394 0xfffe0020, /* dst_mask */
395 false), /* pcrel_offset */
397 /* 16 bit offset from the zero data area pointer. */
398 HOWTO (R_V850_ZDA_16_16_SPLIT_OFFSET, /* type */
400 2, /* size (0 = byte, 1 = short, 2 = long) */
402 false, /* pc_relative */
404 complain_overflow_dont, /* complain_on_overflow */
405 v850_elf_reloc, /* special_function */
406 "R_V850_ZDA_16_16_SPLIT_OFFSET",/* name */
407 false, /* partial_inplace */
408 0xfffe0020, /* src_mask */
409 0xfffe0020, /* dst_mask */
410 false), /* pcrel_offset */
412 /* 6 bit offset from the call table base pointer. */
413 HOWTO (R_V850_CALLT_6_7_OFFSET, /* type */
415 1, /* size (0 = byte, 1 = short, 2 = long) */
417 false, /* pc_relative */
419 complain_overflow_dont, /* complain_on_overflow */
420 v850_elf_reloc, /* special_function */
421 "R_V850_CALLT_6_7_OFFSET", /* name */
422 false, /* partial_inplace */
425 false), /* pcrel_offset */
427 /* 16 bit offset from the call table base pointer. */
428 HOWTO (R_V850_CALLT_16_16_OFFSET, /* type */
430 1, /* size (0 = byte, 1 = short, 2 = long) */
432 false, /* pc_relative */
434 complain_overflow_dont, /* complain_on_overflow */
435 v850_elf_reloc, /* special_function */
436 "R_V850_CALLT_16_16_OFFSET", /* name */
437 false, /* partial_inplace */
438 0xffff, /* src_mask */
439 0xffff, /* dst_mask */
440 false), /* pcrel_offset */
442 /* GNU extension to record C++ vtable hierarchy */
443 HOWTO (R_V850_GNU_VTINHERIT, /* type */
445 2, /* size (0 = byte, 1 = short, 2 = long) */
447 false, /* pc_relative */
449 complain_overflow_dont, /* complain_on_overflow */
450 NULL, /* special_function */
451 "R_V850_GNU_VTINHERIT", /* name */
452 false, /* partial_inplace */
455 false), /* pcrel_offset */
457 /* GNU extension to record C++ vtable member usage */
458 HOWTO (R_V850_GNU_VTENTRY, /* type */
460 2, /* size (0 = byte, 1 = short, 2 = long) */
462 false, /* pc_relative */
464 complain_overflow_dont, /* complain_on_overflow */
465 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
466 "R_V850_GNU_VTENTRY", /* name */
467 false, /* partial_inplace */
470 false), /* pcrel_offset */
474 /* Map BFD reloc types to V850 ELF reloc types. */
476 struct v850_elf_reloc_map
478 /* BFD_RELOC_V850_CALLT_16_16_OFFSET is 258, which will not fix in an
480 bfd_reloc_code_real_type bfd_reloc_val;
481 unsigned int elf_reloc_val;
484 static const struct v850_elf_reloc_map v850_elf_reloc_map[] =
486 { BFD_RELOC_NONE, R_V850_NONE },
487 { BFD_RELOC_V850_9_PCREL, R_V850_9_PCREL },
488 { BFD_RELOC_V850_22_PCREL, R_V850_22_PCREL },
489 { BFD_RELOC_HI16_S, R_V850_HI16_S },
490 { BFD_RELOC_HI16, R_V850_HI16 },
491 { BFD_RELOC_LO16, R_V850_LO16 },
492 { BFD_RELOC_32, R_V850_32 },
493 { BFD_RELOC_16, R_V850_16 },
494 { BFD_RELOC_8, R_V850_8 },
495 { BFD_RELOC_V850_SDA_16_16_OFFSET, R_V850_SDA_16_16_OFFSET },
496 { BFD_RELOC_V850_SDA_15_16_OFFSET, R_V850_SDA_15_16_OFFSET },
497 { BFD_RELOC_V850_ZDA_16_16_OFFSET, R_V850_ZDA_16_16_OFFSET },
498 { BFD_RELOC_V850_ZDA_15_16_OFFSET, R_V850_ZDA_15_16_OFFSET },
499 { BFD_RELOC_V850_TDA_6_8_OFFSET, R_V850_TDA_6_8_OFFSET },
500 { BFD_RELOC_V850_TDA_7_8_OFFSET, R_V850_TDA_7_8_OFFSET },
501 { BFD_RELOC_V850_TDA_7_7_OFFSET, R_V850_TDA_7_7_OFFSET },
502 { BFD_RELOC_V850_TDA_16_16_OFFSET, R_V850_TDA_16_16_OFFSET },
503 { BFD_RELOC_V850_TDA_4_5_OFFSET, R_V850_TDA_4_5_OFFSET },
504 { BFD_RELOC_V850_TDA_4_4_OFFSET, R_V850_TDA_4_4_OFFSET },
505 { BFD_RELOC_V850_SDA_16_16_SPLIT_OFFSET, R_V850_SDA_16_16_SPLIT_OFFSET },
506 { BFD_RELOC_V850_ZDA_16_16_SPLIT_OFFSET, R_V850_ZDA_16_16_SPLIT_OFFSET },
507 { BFD_RELOC_V850_CALLT_6_7_OFFSET, R_V850_CALLT_6_7_OFFSET },
508 { BFD_RELOC_V850_CALLT_16_16_OFFSET, R_V850_CALLT_16_16_OFFSET },
509 { BFD_RELOC_VTABLE_INHERIT, R_V850_GNU_VTINHERIT },
510 { BFD_RELOC_VTABLE_ENTRY, R_V850_GNU_VTENTRY },
514 /* Map a bfd relocation into the appropriate howto structure. */
516 static reloc_howto_type *
517 v850_elf_reloc_type_lookup (abfd, code)
518 bfd * abfd ATTRIBUTE_UNUSED;
519 bfd_reloc_code_real_type code;
523 for (i = ARRAY_SIZE (v850_elf_reloc_map); i --;)
524 if (v850_elf_reloc_map[i].bfd_reloc_val == code)
526 unsigned int elf_reloc_val = v850_elf_reloc_map[i].elf_reloc_val;
528 BFD_ASSERT (v850_elf_howto_table[elf_reloc_val].type == elf_reloc_val);
530 return v850_elf_howto_table + elf_reloc_val;
536 /* Set the howto pointer for an V850 ELF reloc. */
539 v850_elf_info_to_howto_rel (abfd, cache_ptr, dst)
540 bfd * abfd ATTRIBUTE_UNUSED;
542 Elf32_Internal_Rel * dst;
546 r_type = ELF32_R_TYPE (dst->r_info);
547 BFD_ASSERT (r_type < (unsigned int) R_V850_max);
548 cache_ptr->howto = &v850_elf_howto_table[r_type];
551 /* Set the howto pointer for a V850 ELF reloc (type RELA). */
553 v850_elf_info_to_howto_rela (abfd, cache_ptr, dst)
554 bfd * abfd ATTRIBUTE_UNUSED;
556 Elf32_Internal_Rela *dst;
560 r_type = ELF32_R_TYPE (dst->r_info);
561 BFD_ASSERT (r_type < (unsigned int) R_V850_max);
562 cache_ptr->howto = &v850_elf_howto_table[r_type];
565 /* Look through the relocs for a section during the first phase, and
566 allocate space in the global offset table or procedure linkage
570 v850_elf_check_relocs (abfd, info, sec, relocs)
572 struct bfd_link_info * info;
574 const Elf_Internal_Rela * relocs;
578 Elf_Internal_Shdr *symtab_hdr;
579 struct elf_link_hash_entry **sym_hashes;
580 const Elf_Internal_Rela *rel;
581 const Elf_Internal_Rela *rel_end;
583 enum v850_reloc_type r_type;
585 const char *common = (const char *)0;
587 if (info->relocateable)
591 fprintf (stderr, "v850_elf_check_relocs called for section %s in %s\n",
592 bfd_get_section_name (abfd, sec),
593 bfd_get_filename (abfd));
596 dynobj = elf_hash_table (info)->dynobj;
597 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
598 sym_hashes = elf_sym_hashes (abfd);
601 rel_end = relocs + sec->reloc_count;
602 for (rel = relocs; rel < rel_end; rel++)
604 unsigned long r_symndx;
605 struct elf_link_hash_entry *h;
607 r_symndx = ELF32_R_SYM (rel->r_info);
608 if (r_symndx < symtab_hdr->sh_info)
611 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
613 r_type = (enum v850_reloc_type) ELF32_R_TYPE (rel->r_info);
619 case R_V850_22_PCREL:
626 case R_V850_CALLT_6_7_OFFSET:
627 case R_V850_CALLT_16_16_OFFSET:
630 /* This relocation describes the C++ object vtable hierarchy.
631 Reconstruct it for later use during GC. */
632 case R_V850_GNU_VTINHERIT:
633 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
637 /* This relocation describes which C++ vtable entries
638 are actually used. Record for later use during GC. */
639 case R_V850_GNU_VTENTRY:
640 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
644 case R_V850_SDA_16_16_SPLIT_OFFSET:
645 case R_V850_SDA_16_16_OFFSET:
646 case R_V850_SDA_15_16_OFFSET:
647 other = V850_OTHER_SDA;
649 goto small_data_common;
651 case R_V850_ZDA_16_16_SPLIT_OFFSET:
652 case R_V850_ZDA_16_16_OFFSET:
653 case R_V850_ZDA_15_16_OFFSET:
654 other = V850_OTHER_ZDA;
656 goto small_data_common;
658 case R_V850_TDA_4_5_OFFSET:
659 case R_V850_TDA_4_4_OFFSET:
660 case R_V850_TDA_6_8_OFFSET:
661 case R_V850_TDA_7_8_OFFSET:
662 case R_V850_TDA_7_7_OFFSET:
663 case R_V850_TDA_16_16_OFFSET:
664 other = V850_OTHER_TDA;
668 #define V850_OTHER_MASK (V850_OTHER_TDA | V850_OTHER_SDA | V850_OTHER_ZDA)
673 /* Flag which type of relocation was used. */
675 if ((h->other & V850_OTHER_MASK) != (other & V850_OTHER_MASK)
676 && (h->other & V850_OTHER_ERROR) == 0)
679 static char buff[200]; /* XXX */
681 switch (h->other & V850_OTHER_MASK)
684 msg = _("Variable `%s' cannot occupy in multiple small data regions");
686 case V850_OTHER_SDA | V850_OTHER_ZDA | V850_OTHER_TDA:
687 msg = _("Variable `%s' can only be in one of the small, zero, and tiny data regions");
689 case V850_OTHER_SDA | V850_OTHER_ZDA:
690 msg = _("Variable `%s' cannot be in both small and zero data regions simultaneously");
692 case V850_OTHER_SDA | V850_OTHER_TDA:
693 msg = _("Variable `%s' cannot be in both small and tiny data regions simultaneously");
695 case V850_OTHER_ZDA | V850_OTHER_TDA:
696 msg = _("Variable `%s' cannot be in both zero and tiny data regions simultaneously");
700 sprintf (buff, msg, h->root.root.string);
701 info->callbacks->warning (info, buff, h->root.root.string,
702 abfd, h->root.u.def.section, 0);
704 bfd_set_error (bfd_error_bad_value);
705 h->other |= V850_OTHER_ERROR;
710 if (h && h->root.type == bfd_link_hash_common
712 && !strcmp (bfd_get_section_name (abfd, h->root.u.c.p->section), "COMMON"))
716 section = h->root.u.c.p->section = bfd_make_section_old_way (abfd, common);
717 section->flags |= SEC_IS_COMMON;
721 fprintf (stderr, "v850_elf_check_relocs, found %s relocation for %s%s\n",
722 v850_elf_howto_table[ (int)r_type ].name,
723 (h && h->root.root.string) ? h->root.root.string : "<unknown>",
724 (h->root.type == bfd_link_hash_common) ? ", symbol is common" : "");
733 /* In the old version, when an entry was checked out from the table,
734 it was deleted. This produced an error if the entry was needed
735 more than once, as the second attempted retry failed.
737 In the current version, the entry is not deleted, instead we set
738 the field 'found' to true. If a second lookup matches the same
739 entry, then we know that the hi16s reloc has already been updated
740 and does not need to be updated a second time.
742 TODO - TOFIX: If it is possible that we need to restore 2 different
743 addresses from the same table entry, where the first generates an
744 overflow, whilst the second do not, then this code will fail. */
746 typedef struct hi16s_location
750 unsigned long counter;
752 struct hi16s_location * next;
756 static hi16s_location * previous_hi16s;
757 static hi16s_location * free_hi16s;
758 static unsigned long hi16s_counter;
761 remember_hi16s_reloc (abfd, addend, address)
766 hi16s_location * entry = NULL;
768 /* Find a free structure. */
769 if (free_hi16s == NULL)
770 free_hi16s = (hi16s_location *) bfd_zalloc (abfd, sizeof (* free_hi16s));
773 free_hi16s = free_hi16s->next;
775 entry->addend = addend;
776 entry->address = address;
777 entry->counter = hi16s_counter ++;
778 entry->found = false;
779 entry->next = previous_hi16s;
780 previous_hi16s = entry;
782 /* Cope with wrap around of our counter. */
783 if (hi16s_counter == 0)
785 /* XXX - Assume that all counter entries differ only in their low 16 bits. */
786 for (entry = previous_hi16s; entry != NULL; entry = entry->next)
787 entry->counter &= 0xffff;
789 hi16s_counter = 0x10000;
796 find_remembered_hi16s_reloc (addend, already_found)
798 boolean * already_found;
800 hi16s_location * match = NULL;
801 hi16s_location * entry;
802 hi16s_location * previous = NULL;
803 hi16s_location * prev;
806 /* Search the table. Record the most recent entry that matches. */
807 for (entry = previous_hi16s; entry; entry = entry->next)
809 if (entry->addend == addend
810 && (match == NULL || match->counter < entry->counter))
822 /* Extract the address. */
823 addr = match->address;
825 /* Remeber if this entry has already been used before. */
827 * already_found = match->found;
829 /* Note that this entry has now been used. */
835 /* FIXME: The code here probably ought to be removed and the code in reloc.c
836 allowed to do its stuff instead. At least for most of the relocs, anwyay. */
838 static bfd_reloc_status_type
839 v850_elf_perform_relocation (abfd, r_type, addend, address)
846 bfd_signed_vma saddend = (bfd_signed_vma) addend;
851 /* fprintf (stderr, "reloc type %d not SUPPORTED\n", r_type ); */
852 return bfd_reloc_notsupported;
855 bfd_put_32 (abfd, addend, address);
858 case R_V850_22_PCREL:
859 if (saddend > 0x1fffff || saddend < -0x200000)
860 return bfd_reloc_overflow;
862 if ((addend % 2) != 0)
863 return bfd_reloc_dangerous;
865 insn = bfd_get_32 (abfd, address);
867 insn |= (((addend & 0xfffe) << 16) | ((addend & 0x3f0000) >> 16));
868 bfd_put_32 (abfd, insn, address);
872 if (saddend > 0xff || saddend < -0x100)
873 return bfd_reloc_overflow;
875 if ((addend % 2) != 0)
876 return bfd_reloc_dangerous;
878 insn = bfd_get_16 (abfd, address);
880 insn |= ((addend & 0x1f0) << 7) | ((addend & 0x0e) << 3);
884 addend += (bfd_get_16 (abfd, address) << 16);
885 addend = (addend >> 16);
890 /* Remember where this relocation took place. */
891 remember_hi16s_reloc (abfd, addend, address);
893 addend += (bfd_get_16 (abfd, address) << 16);
894 addend = (addend >> 16) + ((addend & 0x8000) != 0);
896 /* This relocation cannot overflow. */
904 /* Calculate the sum of the value stored in the instruction and the
905 addend and check for overflow from the low 16 bits into the high
906 16 bits. The assembler has already done some of this: If the
907 value stored in the instruction has its 15th bit set, (counting
908 from zero) then the assembler will have added 1 to the value
909 stored in the associated HI16S reloc. So for example, these
912 movhi hi( fred ), r0, r1
913 movea lo( fred ), r1, r1
915 will store 0 in the value fields for the MOVHI and MOVEA instructions
916 and addend will be the address of fred, but for these instructions:
918 movhi hi( fred + 0x123456), r0, r1
919 movea lo( fred + 0x123456), r1, r1
921 the value stored in the MOVHI instruction will be 0x12 and the value
922 stored in the MOVEA instruction will be 0x3456. If however the
925 movhi hi( fred + 0x10ffff), r0, r1
926 movea lo( fred + 0x10ffff), r1, r1
928 then the value stored in the MOVHI instruction would be 0x11 (not
929 0x10) and the value stored in the MOVEA instruction would be 0xffff.
930 Thus (assuming for the moment that the addend is 0), at run time the
931 MOVHI instruction loads 0x110000 into r1, then the MOVEA instruction
932 adds 0xffffffff (sign extension!) producing 0x10ffff. Similarly if
933 the instructions were:
935 movhi hi( fred - 1), r0, r1
936 movea lo( fred - 1), r1, r1
938 then 0 is stored in the MOVHI instruction and -1 is stored in the
941 Overflow can occur if the addition of the value stored in the
942 instruction plus the addend sets the 15th bit when before it was clear.
943 This is because the 15th bit will be sign extended into the high part,
944 thus reducing its value by one, but since the 15th bit was originally
945 clear, the assembler will not have added 1 to the previous HI16S reloc
946 to compensate for this effect. For example:
948 movhi hi( fred + 0x123456), r0, r1
949 movea lo( fred + 0x123456), r1, r1
951 The value stored in HI16S reloc is 0x12, the value stored in the LO16
952 reloc is 0x3456. If we assume that the address of fred is 0x00007000
953 then the relocations become:
955 HI16S: 0x0012 + (0x00007000 >> 16) = 0x12
956 LO16: 0x3456 + (0x00007000 & 0xffff) = 0xa456
958 but when the instructions are executed, the MOVEA instruction's value
959 is signed extended, so the sum becomes:
964 0x0011a456 but 'fred + 0x123456' = 0x0012a456
966 Note that if the 15th bit was set in the value stored in the LO16
967 reloc, then we do not have to do anything:
969 movhi hi( fred + 0x10ffff), r0, r1
970 movea lo( fred + 0x10ffff), r1, r1
972 HI16S: 0x0011 + (0x00007000 >> 16) = 0x11
973 LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff
978 0x00116fff = fred + 0x10ffff = 0x7000 + 0x10ffff
980 Overflow can also occur if the computation carries into the 16th bit
981 and it also results in the 15th bit having the same value as the 15th
982 bit of the original value. What happens is that the HI16S reloc
983 will have already examined the 15th bit of the original value and
984 added 1 to the high part if the bit is set. This compensates for the
985 sign extension of 15th bit of the result of the computation. But now
986 there is a carry into the 16th bit, and this has not been allowed for.
988 So, for example if fred is at address 0xf000:
990 movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set]
991 movea lo( fred + 0xffff), r1, r1
993 HI16S: 0x0001 + (0x0000f000 >> 16) = 0x0001
994 LO16: 0xffff + (0x0000f000 & 0xffff) = 0xefff (carry into bit 16 is lost)
999 0x0000efff but 'fred + 0xffff' = 0x0001efff
1001 Similarly, if the 15th bit remains clear, but overflow occurs into
1002 the 16th bit then (assuming the address of fred is 0xf000):
1004 movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear]
1005 movea lo( fred + 0x7000), r1, r1
1007 HI16S: 0x0000 + (0x0000f000 >> 16) = 0x0000
1008 LO16: 0x7000 + (0x0000f000 & 0xffff) = 0x6fff (carry into bit 16 is lost)
1013 0x00006fff but 'fred + 0x7000' = 0x00016fff
1015 Note - there is no need to change anything if a carry occurs, and the
1016 15th bit changes its value from being set to being clear, as the HI16S
1017 reloc will have already added in 1 to the high part for us:
1019 movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set]
1020 movea lo( fred + 0xffff), r1, r1
1022 HI16S: 0x0001 + (0x00007000 >> 16)
1023 LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff (carry into bit 16 is lost)
1026 + 0x00006fff (bit 15 not set, so the top half is zero)
1028 0x00016fff which is right (assuming that fred is at 0x7000)
1030 but if the 15th bit goes from being clear to being set, then we must
1031 once again handle overflow:
1033 movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear]
1034 movea lo( fred + 0x7000), r1, r1
1036 HI16S: 0x0000 + (0x0000ffff >> 16)
1037 LO16: 0x7000 + (0x0000ffff & 0xffff) = 0x6fff (carry into bit 16)
1040 + 0x00006fff (bit 15 not set, so the top half is zero)
1042 0x00006fff which is wrong (assuming that fred is at 0xffff). */
1046 insn = bfd_get_16 (abfd, address);
1047 result = insn + addend;
1049 #define BIT15_SET(x) ((x) & 0x8000)
1050 #define OVERFLOWS(a,i) ((((a) & 0xffff) + (i)) > 0xffff)
1052 if ((BIT15_SET (result) && ! BIT15_SET (addend))
1053 || (OVERFLOWS (addend, insn)
1054 && ((! BIT15_SET (insn)) || (BIT15_SET (addend)))))
1056 boolean already_updated;
1057 bfd_byte * hi16s_address = find_remembered_hi16s_reloc
1058 (addend, & already_updated);
1060 /* Amend the matching HI16_S relocation. */
1061 if (hi16s_address != NULL)
1063 if (! already_updated)
1065 insn = bfd_get_16 (abfd, hi16s_address);
1067 bfd_put_16 (abfd, insn, hi16s_address);
1072 fprintf (stderr, _("FAILED to find previous HI16 reloc\n"));
1073 return bfd_reloc_overflow;
1077 /* Do not complain if value has top bit set, as this has been anticipated. */
1078 insn = result & 0xffff;
1083 addend += (char) bfd_get_8 (abfd, address);
1085 saddend = (bfd_signed_vma) addend;
1087 if (saddend > 0x7f || saddend < -0x80)
1088 return bfd_reloc_overflow;
1090 bfd_put_8 (abfd, addend, address);
1091 return bfd_reloc_ok;
1093 case R_V850_CALLT_16_16_OFFSET:
1094 addend += bfd_get_16 (abfd, address);
1096 saddend = (bfd_signed_vma) addend;
1098 if (saddend > 0xffff || saddend < 0)
1099 return bfd_reloc_overflow;
1107 case R_V850_SDA_16_16_OFFSET:
1108 case R_V850_ZDA_16_16_OFFSET:
1109 case R_V850_TDA_16_16_OFFSET:
1110 addend += bfd_get_16 (abfd, address);
1112 saddend = (bfd_signed_vma) addend;
1114 if (saddend > 0x7fff || saddend < -0x8000)
1115 return bfd_reloc_overflow;
1120 case R_V850_SDA_15_16_OFFSET:
1121 case R_V850_ZDA_15_16_OFFSET:
1122 insn = bfd_get_16 (abfd, address);
1123 addend += (insn & 0xfffe);
1125 saddend = (bfd_signed_vma) addend;
1127 if (saddend > 0x7ffe || saddend < -0x8000)
1128 return bfd_reloc_overflow;
1131 return bfd_reloc_dangerous;
1133 insn = (addend & ~1) | (insn & 1);
1136 case R_V850_TDA_6_8_OFFSET:
1137 insn = bfd_get_16 (abfd, address);
1138 addend += ((insn & 0x7e) << 1);
1140 saddend = (bfd_signed_vma) addend;
1142 if (saddend > 0xfc || saddend < 0)
1143 return bfd_reloc_overflow;
1146 return bfd_reloc_dangerous;
1149 insn |= (addend >> 1);
1152 case R_V850_TDA_7_8_OFFSET:
1153 insn = bfd_get_16 (abfd, address);
1154 addend += ((insn & 0x7f) << 1);
1156 saddend = (bfd_signed_vma) addend;
1158 if (saddend > 0xfe || saddend < 0)
1159 return bfd_reloc_overflow;
1162 return bfd_reloc_dangerous;
1165 insn |= (addend >> 1);
1168 case R_V850_TDA_7_7_OFFSET:
1169 insn = bfd_get_16 (abfd, address);
1170 addend += insn & 0x7f;
1172 saddend = (bfd_signed_vma) addend;
1174 if (saddend > 0x7f || saddend < 0)
1175 return bfd_reloc_overflow;
1181 case R_V850_TDA_4_5_OFFSET:
1182 insn = bfd_get_16 (abfd, address);
1183 addend += ((insn & 0xf) << 1);
1185 saddend = (bfd_signed_vma) addend;
1187 if (saddend > 0x1e || saddend < 0)
1188 return bfd_reloc_overflow;
1191 return bfd_reloc_dangerous;
1194 insn |= (addend >> 1);
1197 case R_V850_TDA_4_4_OFFSET:
1198 insn = bfd_get_16 (abfd, address);
1199 addend += insn & 0xf;
1201 saddend = (bfd_signed_vma) addend;
1203 if (saddend > 0xf || saddend < 0)
1204 return bfd_reloc_overflow;
1210 case R_V850_ZDA_16_16_SPLIT_OFFSET:
1211 case R_V850_SDA_16_16_SPLIT_OFFSET:
1212 insn = bfd_get_32 (abfd, address);
1213 addend += ((insn & 0xfffe0000) >> 16) + ((insn & 0x20) >> 5);
1215 saddend = (bfd_signed_vma) addend;
1217 if (saddend > 0x7fff || saddend < -0x8000)
1218 return bfd_reloc_overflow;
1221 insn |= (addend & 1) << 5;
1222 insn |= (addend & ~1) << 16;
1224 bfd_put_32 (abfd, insn, address);
1225 return bfd_reloc_ok;
1227 case R_V850_CALLT_6_7_OFFSET:
1228 insn = bfd_get_16 (abfd, address);
1229 addend += ((insn & 0x3f) << 1);
1231 saddend = (bfd_signed_vma) addend;
1233 if (saddend > 0x7e || saddend < 0)
1234 return bfd_reloc_overflow;
1237 return bfd_reloc_dangerous;
1240 insn |= (addend >> 1);
1243 case R_V850_GNU_VTINHERIT:
1244 case R_V850_GNU_VTENTRY:
1245 return bfd_reloc_ok;
1249 bfd_put_16 (abfd, insn, address);
1250 return bfd_reloc_ok;
1253 /* Insert the addend into the instruction. */
1255 static bfd_reloc_status_type
1256 v850_elf_reloc (abfd, reloc, symbol, data, isection, obfd, err)
1257 bfd * abfd ATTRIBUTE_UNUSED;
1260 PTR data ATTRIBUTE_UNUSED;
1261 asection * isection;
1263 char ** err ATTRIBUTE_UNUSED;
1267 /* If there is an output BFD,
1268 and the symbol is not a section name (which is only defined at final link time),
1269 and either we are not putting the addend into the instruction
1270 or the addend is zero, so there is nothing to add into the instruction
1271 then just fixup the address and return. */
1272 if (obfd != (bfd *) NULL
1273 && (symbol->flags & BSF_SECTION_SYM) == 0
1274 && (! reloc->howto->partial_inplace
1275 || reloc->addend == 0))
1277 reloc->address += isection->output_offset;
1278 return bfd_reloc_ok;
1281 else if (obfd != NULL)
1282 return bfd_reloc_continue;
1285 /* Catch relocs involving undefined symbols. */
1286 if (bfd_is_und_section (symbol->section)
1287 && (symbol->flags & BSF_WEAK) == 0
1289 return bfd_reloc_undefined;
1291 /* We handle final linking of some relocs ourselves. */
1293 /* Is the address of the relocation really within the section? */
1294 if (reloc->address > isection->_cooked_size)
1295 return bfd_reloc_outofrange;
1297 /* Work out which section the relocation is targetted at and the
1298 initial relocation command value. */
1300 /* Get symbol value. (Common symbols are special.) */
1301 if (bfd_is_com_section (symbol->section))
1304 relocation = symbol->value;
1306 /* Convert input-section-relative symbol value to absolute + addend. */
1307 relocation += symbol->section->output_section->vma;
1308 relocation += symbol->section->output_offset;
1309 relocation += reloc->addend;
1311 #if 0 /* Since this reloc is going to be processed later on, we should
1312 not make it pc-relative here. To test this, try assembling and
1313 linking this program:
1321 .section ".foo","ax"
1325 if (reloc->howto->pc_relative == true)
1327 /* Here the variable relocation holds the final address of the
1328 symbol we are relocating against, plus any addend. */
1329 relocation -= isection->output_section->vma + isection->output_offset;
1331 /* Deal with pcrel_offset. */
1332 relocation -= reloc->address;
1335 reloc->addend = relocation;
1336 return bfd_reloc_ok;
1340 v850_elf_is_local_label_name (abfd, name)
1341 bfd * abfd ATTRIBUTE_UNUSED;
1344 return ( (name[0] == '.' && (name[1] == 'L' || name[1] == '.'))
1345 || (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_'));
1348 /* Perform a relocation as part of a final link. */
1350 static bfd_reloc_status_type
1351 v850_elf_final_link_relocate (howto, input_bfd, output_bfd,
1352 input_section, contents, offset, value,
1353 addend, info, sym_sec, is_local)
1354 reloc_howto_type * howto;
1356 bfd * output_bfd ATTRIBUTE_UNUSED;
1357 asection * input_section;
1358 bfd_byte * contents;
1362 struct bfd_link_info * info;
1364 int is_local ATTRIBUTE_UNUSED;
1366 unsigned long r_type = howto->type;
1367 bfd_byte * hit_data = contents + offset;
1369 /* Adjust the value according to the relocation. */
1372 case R_V850_9_PCREL:
1373 value -= (input_section->output_section->vma
1374 + input_section->output_offset);
1378 case R_V850_22_PCREL:
1379 value -= (input_section->output_section->vma
1380 + input_section->output_offset
1383 /* If the sign extension will corrupt the value then we have overflowed. */
1384 if (((value & 0xff000000) != 0x0) && ((value & 0xff000000) != 0xff000000))
1385 return bfd_reloc_overflow;
1387 /* Only the bottom 24 bits of the PC are valid */
1388 value = SEXT24 (value);
1399 case R_V850_ZDA_15_16_OFFSET:
1400 case R_V850_ZDA_16_16_OFFSET:
1401 case R_V850_ZDA_16_16_SPLIT_OFFSET:
1402 if (sym_sec == NULL)
1403 return bfd_reloc_undefined;
1405 value -= sym_sec->output_section->vma;
1408 case R_V850_SDA_15_16_OFFSET:
1409 case R_V850_SDA_16_16_OFFSET:
1410 case R_V850_SDA_16_16_SPLIT_OFFSET:
1413 struct bfd_link_hash_entry * h;
1415 if (sym_sec == NULL)
1416 return bfd_reloc_undefined;
1418 /* Get the value of __gp. */
1419 h = bfd_link_hash_lookup (info->hash, "__gp", false, false, true);
1420 if (h == (struct bfd_link_hash_entry *) NULL
1421 || h->type != bfd_link_hash_defined)
1422 return bfd_reloc_other;
1424 gp = (h->u.def.value
1425 + h->u.def.section->output_section->vma
1426 + h->u.def.section->output_offset);
1428 value -= sym_sec->output_section->vma;
1429 value -= (gp - sym_sec->output_section->vma);
1433 case R_V850_TDA_4_4_OFFSET:
1434 case R_V850_TDA_4_5_OFFSET:
1435 case R_V850_TDA_16_16_OFFSET:
1436 case R_V850_TDA_7_7_OFFSET:
1437 case R_V850_TDA_7_8_OFFSET:
1438 case R_V850_TDA_6_8_OFFSET:
1441 struct bfd_link_hash_entry * h;
1443 /* Get the value of __ep. */
1444 h = bfd_link_hash_lookup (info->hash, "__ep", false, false, true);
1445 if (h == (struct bfd_link_hash_entry *) NULL
1446 || h->type != bfd_link_hash_defined)
1447 /* Actually this indicates that __ep could not be found. */
1448 return bfd_reloc_continue;
1450 ep = (h->u.def.value
1451 + h->u.def.section->output_section->vma
1452 + h->u.def.section->output_offset);
1458 case R_V850_CALLT_6_7_OFFSET:
1461 struct bfd_link_hash_entry * h;
1463 /* Get the value of __ctbp. */
1464 h = bfd_link_hash_lookup (info->hash, "__ctbp", false, false, true);
1465 if (h == (struct bfd_link_hash_entry *) NULL
1466 || h->type != bfd_link_hash_defined)
1467 /* Actually this indicates that __ctbp could not be found. */
1468 return bfd_reloc_dangerous + 1;
1470 ctbp = (h->u.def.value
1471 + h->u.def.section->output_section->vma
1472 + h->u.def.section->output_offset);
1477 case R_V850_CALLT_16_16_OFFSET:
1480 struct bfd_link_hash_entry * h;
1482 if (sym_sec == NULL)
1483 return bfd_reloc_undefined;
1485 /* Get the value of __ctbp. */
1486 h = bfd_link_hash_lookup (info->hash, "__ctbp", false, false, true);
1487 if (h == (struct bfd_link_hash_entry *) NULL
1488 || h->type != bfd_link_hash_defined)
1489 return (bfd_reloc_dangerous + 1);
1491 ctbp = (h->u.def.value
1492 + h->u.def.section->output_section->vma
1493 + h->u.def.section->output_offset);
1495 value -= sym_sec->output_section->vma;
1496 value -= (ctbp - sym_sec->output_section->vma);
1501 case R_V850_GNU_VTINHERIT:
1502 case R_V850_GNU_VTENTRY:
1503 return bfd_reloc_ok;
1506 return bfd_reloc_notsupported;
1509 /* Perform the relocation. */
1510 return v850_elf_perform_relocation (input_bfd, r_type, value + addend, hit_data);
1513 /* Relocate an V850 ELF section. */
1516 v850_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1517 contents, relocs, local_syms, local_sections)
1519 struct bfd_link_info * info;
1521 asection * input_section;
1522 bfd_byte * contents;
1523 Elf_Internal_Rela * relocs;
1524 Elf_Internal_Sym * local_syms;
1525 asection ** local_sections;
1527 Elf_Internal_Shdr * symtab_hdr;
1528 struct elf_link_hash_entry ** sym_hashes;
1529 Elf_Internal_Rela * rel;
1530 Elf_Internal_Rela * relend;
1532 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1533 sym_hashes = elf_sym_hashes (input_bfd);
1535 if (sym_hashes == NULL)
1537 info->callbacks->warning
1538 (info, "no hash table available", NULL, input_bfd, input_section, 0);
1543 /* Reset the list of remembered HI16S relocs to empty. */
1544 free_hi16s = previous_hi16s;
1545 previous_hi16s = NULL;
1549 relend = relocs + input_section->reloc_count;
1550 for (; rel < relend; rel++)
1553 reloc_howto_type * howto;
1554 unsigned long r_symndx;
1555 Elf_Internal_Sym * sym;
1557 struct elf_link_hash_entry * h;
1559 bfd_reloc_status_type r;
1561 r_symndx = ELF32_R_SYM (rel->r_info);
1562 r_type = ELF32_R_TYPE (rel->r_info);
1564 if (r_type == R_V850_GNU_VTENTRY
1565 || r_type == R_V850_GNU_VTINHERIT)
1568 howto = v850_elf_howto_table + r_type;
1570 if (info->relocateable)
1572 /* This is a relocateable link. We don't have to change
1573 anything, unless the reloc is against a section symbol,
1574 in which case we have to adjust according to where the
1575 section symbol winds up in the output section. */
1576 if (r_symndx < symtab_hdr->sh_info)
1578 sym = local_syms + r_symndx;
1579 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1581 sec = local_sections[r_symndx];
1582 rel->r_addend += sec->output_offset + sym->st_value;
1589 /* This is a final link. */
1593 if (r_symndx < symtab_hdr->sh_info)
1595 sym = local_syms + r_symndx;
1596 sec = local_sections[r_symndx];
1597 relocation = (sec->output_section->vma
1598 + sec->output_offset
1604 name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, sym->st_name);
1605 name = (name == NULL) ? "<none>" : name;
1606 fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
1607 sec->name, name, sym->st_name,
1608 sec->output_section->vma, sec->output_offset, sym->st_value, rel->r_addend);
1614 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1616 while (h->root.type == bfd_link_hash_indirect
1617 || h->root.type == bfd_link_hash_warning)
1618 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1620 if (h->root.type == bfd_link_hash_defined
1621 || h->root.type == bfd_link_hash_defweak)
1623 sec = h->root.u.def.section;
1624 relocation = (h->root.u.def.value
1625 + sec->output_section->vma
1626 + sec->output_offset);
1628 fprintf (stderr, "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n",
1629 sec->name, h->root.root.string, h->root.u.def.value, sec->output_section->vma, sec->output_offset, relocation);
1632 else if (h->root.type == bfd_link_hash_undefweak)
1635 fprintf (stderr, "undefined: sec: %s, name: %s\n",
1636 sec->name, h->root.root.string);
1642 if (! ((*info->callbacks->undefined_symbol)
1643 (info, h->root.root.string, input_bfd,
1644 input_section, rel->r_offset, true)))
1647 fprintf (stderr, "unknown: name: %s\n", h->root.root.string);
1653 /* FIXME: We should use the addend, but the COFF relocations don't. */
1654 r = v850_elf_final_link_relocate (howto, input_bfd, output_bfd,
1656 contents, rel->r_offset,
1657 relocation, rel->r_addend,
1658 info, sec, h == NULL);
1660 if (r != bfd_reloc_ok)
1663 const char * msg = (const char *)0;
1666 name = h->root.root.string;
1669 name = (bfd_elf_string_from_elf_section
1670 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1671 if (name == NULL || *name == '\0')
1672 name = bfd_section_name (input_bfd, sec);
1677 case bfd_reloc_overflow:
1678 if (! ((*info->callbacks->reloc_overflow)
1679 (info, name, howto->name, (bfd_vma) 0,
1680 input_bfd, input_section, rel->r_offset)))
1684 case bfd_reloc_undefined:
1685 if (! ((*info->callbacks->undefined_symbol)
1686 (info, name, input_bfd, input_section,
1687 rel->r_offset, true)))
1691 case bfd_reloc_outofrange:
1692 msg = _("internal error: out of range error");
1695 case bfd_reloc_notsupported:
1696 msg = _("internal error: unsupported relocation error");
1699 case bfd_reloc_dangerous:
1700 msg = _("internal error: dangerous relocation");
1703 case bfd_reloc_other:
1704 msg = _("could not locate special linker symbol __gp");
1707 case bfd_reloc_continue:
1708 msg = _("could not locate special linker symbol __ep");
1711 case (bfd_reloc_dangerous + 1):
1712 msg = _("could not locate special linker symbol __ctbp");
1716 msg = _("internal error: unknown error");
1720 if (!((*info->callbacks->warning)
1721 (info, msg, name, input_bfd, input_section,
1733 v850_elf_gc_sweep_hook (abfd, info, sec, relocs)
1734 bfd *abfd ATTRIBUTE_UNUSED;
1735 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1736 asection *sec ATTRIBUTE_UNUSED;
1737 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
1739 /* No got and plt entries for v850-elf. */
1744 v850_elf_gc_mark_hook (abfd, info, rel, h, sym)
1746 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1747 Elf_Internal_Rela *rel;
1748 struct elf_link_hash_entry *h;
1749 Elf_Internal_Sym *sym;
1753 switch (ELF32_R_TYPE (rel->r_info))
1755 case R_V850_GNU_VTINHERIT:
1756 case R_V850_GNU_VTENTRY:
1760 switch (h->root.type)
1762 case bfd_link_hash_defined:
1763 case bfd_link_hash_defweak:
1764 return h->root.u.def.section;
1766 case bfd_link_hash_common:
1767 return h->root.u.c.p->section;
1776 if (!(elf_bad_symtab (abfd)
1777 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
1778 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
1779 && sym->st_shndx != SHN_COMMON))
1781 return bfd_section_from_elf_index (abfd, sym->st_shndx);
1787 /* Set the right machine number. */
1790 v850_elf_object_p (abfd)
1793 switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH)
1796 case E_V850_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, 0); break;
1797 case E_V850E_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850e); break;
1798 case E_V850EA_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850ea); break;
1803 /* Store the machine number in the flags field. */
1806 v850_elf_final_write_processing (abfd, linker)
1808 boolean linker ATTRIBUTE_UNUSED;
1812 switch (bfd_get_mach (abfd))
1815 case 0: val = E_V850_ARCH; break;
1816 case bfd_mach_v850e: val = E_V850E_ARCH; break;
1817 case bfd_mach_v850ea: val = E_V850EA_ARCH; break;
1820 elf_elfheader (abfd)->e_flags &=~ EF_V850_ARCH;
1821 elf_elfheader (abfd)->e_flags |= val;
1824 /* Function to keep V850 specific file flags. */
1827 v850_elf_set_private_flags (abfd, flags)
1831 BFD_ASSERT (!elf_flags_init (abfd)
1832 || elf_elfheader (abfd)->e_flags == flags);
1834 elf_elfheader (abfd)->e_flags = flags;
1835 elf_flags_init (abfd) = true;
1839 /* Copy backend specific data from one object module to another. */
1842 v850_elf_copy_private_bfd_data (ibfd, obfd)
1846 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1847 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1850 BFD_ASSERT (!elf_flags_init (obfd)
1851 || (elf_elfheader (obfd)->e_flags
1852 == elf_elfheader (ibfd)->e_flags));
1854 elf_gp (obfd) = elf_gp (ibfd);
1855 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1856 elf_flags_init (obfd) = true;
1861 /* Merge backend specific data from an object file
1862 to the output object file when linking. */
1864 v850_elf_merge_private_bfd_data (ibfd, obfd)
1871 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1872 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1875 in_flags = elf_elfheader (ibfd)->e_flags;
1876 out_flags = elf_elfheader (obfd)->e_flags;
1878 if (! elf_flags_init (obfd))
1880 /* If the input is the default architecture then do not
1881 bother setting the flags for the output architecture,
1882 instead allow future merges to do this. If no future
1883 merges ever set these flags then they will retain their
1884 unitialised values, which surprise surprise, correspond
1885 to the default values. */
1886 if (bfd_get_arch_info (ibfd)->the_default)
1889 elf_flags_init (obfd) = true;
1890 elf_elfheader (obfd)->e_flags = in_flags;
1892 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
1893 && bfd_get_arch_info (obfd)->the_default)
1894 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
1899 /* Check flag compatibility. */
1900 if (in_flags == out_flags)
1903 if ((in_flags & EF_V850_ARCH) != (out_flags & EF_V850_ARCH)
1904 && (in_flags & EF_V850_ARCH) != E_V850_ARCH)
1905 _bfd_error_handler (_("%s: Architecture mismatch with previous modules"),
1906 bfd_get_filename (ibfd));
1911 /* Display the flags field. */
1914 v850_elf_print_private_bfd_data (abfd, ptr)
1918 FILE * file = (FILE *) ptr;
1920 BFD_ASSERT (abfd != NULL && ptr != NULL);
1922 _bfd_elf_print_private_bfd_data (abfd, ptr);
1924 /* xgettext:c-format */
1925 fprintf (file, _("private flags = %lx: "), elf_elfheader (abfd)->e_flags);
1927 switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH)
1930 case E_V850_ARCH: fprintf (file, _("v850 architecture")); break;
1931 case E_V850E_ARCH: fprintf (file, _("v850e architecture")); break;
1932 case E_V850EA_ARCH: fprintf (file, _("v850ea architecture")); break;
1940 /* V850 ELF uses four common sections. One is the usual one, and the
1941 others are for (small) objects in one of the special data areas:
1942 small, tiny and zero. All the objects are kept together, and then
1943 referenced via the gp register, the ep register or the r0 register
1944 respectively, which yields smaller, faster assembler code. This
1945 approach is copied from elf32-mips.c. */
1947 static asection v850_elf_scom_section;
1948 static asymbol v850_elf_scom_symbol;
1949 static asymbol * v850_elf_scom_symbol_ptr;
1950 static asection v850_elf_tcom_section;
1951 static asymbol v850_elf_tcom_symbol;
1952 static asymbol * v850_elf_tcom_symbol_ptr;
1953 static asection v850_elf_zcom_section;
1954 static asymbol v850_elf_zcom_symbol;
1955 static asymbol * v850_elf_zcom_symbol_ptr;
1957 /* Given a BFD section, try to locate the
1958 corresponding ELF section index. */
1961 v850_elf_section_from_bfd_section (abfd, hdr, sec, retval)
1962 bfd * abfd ATTRIBUTE_UNUSED;
1963 Elf32_Internal_Shdr * hdr ATTRIBUTE_UNUSED;
1967 if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0)
1968 *retval = SHN_V850_SCOMMON;
1969 else if (strcmp (bfd_get_section_name (abfd, sec), ".tcommon") == 0)
1970 *retval = SHN_V850_TCOMMON;
1971 else if (strcmp (bfd_get_section_name (abfd, sec), ".zcommon") == 0)
1972 *retval = SHN_V850_ZCOMMON;
1979 /* Handle the special V850 section numbers that a symbol may use. */
1982 v850_elf_symbol_processing (abfd, asym)
1986 elf_symbol_type * elfsym = (elf_symbol_type *) asym;
1987 unsigned short index;
1989 index = elfsym->internal_elf_sym.st_shndx;
1991 /* If the section index is an "ordinary" index, then it may
1992 refer to a v850 specific section created by the assembler.
1993 Check the section's type and change the index it matches.
1995 FIXME: Should we alter the st_shndx field as well ? */
1997 if (index < elf_elfheader(abfd)[0].e_shnum)
1998 switch (elf_elfsections(abfd)[index]->sh_type)
2000 case SHT_V850_SCOMMON:
2001 index = SHN_V850_SCOMMON;
2004 case SHT_V850_TCOMMON:
2005 index = SHN_V850_TCOMMON;
2008 case SHT_V850_ZCOMMON:
2009 index = SHN_V850_ZCOMMON;
2018 case SHN_V850_SCOMMON:
2019 if (v850_elf_scom_section.name == NULL)
2021 /* Initialize the small common section. */
2022 v850_elf_scom_section.name = ".scommon";
2023 v850_elf_scom_section.flags = SEC_IS_COMMON | SEC_ALLOC | SEC_DATA;
2024 v850_elf_scom_section.output_section = & v850_elf_scom_section;
2025 v850_elf_scom_section.symbol = & v850_elf_scom_symbol;
2026 v850_elf_scom_section.symbol_ptr_ptr = & v850_elf_scom_symbol_ptr;
2027 v850_elf_scom_symbol.name = ".scommon";
2028 v850_elf_scom_symbol.flags = BSF_SECTION_SYM;
2029 v850_elf_scom_symbol.section = & v850_elf_scom_section;
2030 v850_elf_scom_symbol_ptr = & v850_elf_scom_symbol;
2032 asym->section = & v850_elf_scom_section;
2033 asym->value = elfsym->internal_elf_sym.st_size;
2036 case SHN_V850_TCOMMON:
2037 if (v850_elf_tcom_section.name == NULL)
2039 /* Initialize the tcommon section. */
2040 v850_elf_tcom_section.name = ".tcommon";
2041 v850_elf_tcom_section.flags = SEC_IS_COMMON;
2042 v850_elf_tcom_section.output_section = & v850_elf_tcom_section;
2043 v850_elf_tcom_section.symbol = & v850_elf_tcom_symbol;
2044 v850_elf_tcom_section.symbol_ptr_ptr = & v850_elf_tcom_symbol_ptr;
2045 v850_elf_tcom_symbol.name = ".tcommon";
2046 v850_elf_tcom_symbol.flags = BSF_SECTION_SYM;
2047 v850_elf_tcom_symbol.section = & v850_elf_tcom_section;
2048 v850_elf_tcom_symbol_ptr = & v850_elf_tcom_symbol;
2050 asym->section = & v850_elf_tcom_section;
2051 asym->value = elfsym->internal_elf_sym.st_size;
2054 case SHN_V850_ZCOMMON:
2055 if (v850_elf_zcom_section.name == NULL)
2057 /* Initialize the zcommon section. */
2058 v850_elf_zcom_section.name = ".zcommon";
2059 v850_elf_zcom_section.flags = SEC_IS_COMMON;
2060 v850_elf_zcom_section.output_section = & v850_elf_zcom_section;
2061 v850_elf_zcom_section.symbol = & v850_elf_zcom_symbol;
2062 v850_elf_zcom_section.symbol_ptr_ptr = & v850_elf_zcom_symbol_ptr;
2063 v850_elf_zcom_symbol.name = ".zcommon";
2064 v850_elf_zcom_symbol.flags = BSF_SECTION_SYM;
2065 v850_elf_zcom_symbol.section = & v850_elf_zcom_section;
2066 v850_elf_zcom_symbol_ptr = & v850_elf_zcom_symbol;
2068 asym->section = & v850_elf_zcom_section;
2069 asym->value = elfsym->internal_elf_sym.st_size;
2074 /* Hook called by the linker routine which adds symbols from an object
2075 file. We must handle the special v850 section numbers here. */
2078 v850_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
2080 struct bfd_link_info * info ATTRIBUTE_UNUSED;
2081 const Elf_Internal_Sym * sym;
2082 const char ** namep ATTRIBUTE_UNUSED;
2083 flagword * flagsp ATTRIBUTE_UNUSED;
2087 int index = sym->st_shndx;
2089 /* If the section index is an "ordinary" index, then it may
2090 refer to a v850 specific section created by the assembler.
2091 Check the section's type and change the index it matches.
2093 FIXME: Should we alter the st_shndx field as well ? */
2095 if (index < elf_elfheader(abfd)[0].e_shnum)
2096 switch (elf_elfsections(abfd)[index]->sh_type)
2098 case SHT_V850_SCOMMON:
2099 index = SHN_V850_SCOMMON;
2102 case SHT_V850_TCOMMON:
2103 index = SHN_V850_TCOMMON;
2106 case SHT_V850_ZCOMMON:
2107 index = SHN_V850_ZCOMMON;
2116 case SHN_V850_SCOMMON:
2117 *secp = bfd_make_section_old_way (abfd, ".scommon");
2118 (*secp)->flags |= SEC_IS_COMMON;
2119 *valp = sym->st_size;
2122 case SHN_V850_TCOMMON:
2123 *secp = bfd_make_section_old_way (abfd, ".tcommon");
2124 (*secp)->flags |= SEC_IS_COMMON;
2125 *valp = sym->st_size;
2128 case SHN_V850_ZCOMMON:
2129 *secp = bfd_make_section_old_way (abfd, ".zcommon");
2130 (*secp)->flags |= SEC_IS_COMMON;
2131 *valp = sym->st_size;
2139 v850_elf_link_output_symbol_hook (abfd, info, name, sym, input_sec)
2140 bfd * abfd ATTRIBUTE_UNUSED;
2141 struct bfd_link_info * info ATTRIBUTE_UNUSED;
2142 const char * name ATTRIBUTE_UNUSED;
2143 Elf_Internal_Sym * sym;
2144 asection * input_sec;
2146 /* If we see a common symbol, which implies a relocatable link, then
2147 if a symbol was in a special common section in an input file, mark
2148 it as a special common in the output file. */
2150 if (sym->st_shndx == SHN_COMMON)
2152 if (strcmp (input_sec->name, ".scommon") == 0)
2153 sym->st_shndx = SHN_V850_SCOMMON;
2154 else if (strcmp (input_sec->name, ".tcommon") == 0)
2155 sym->st_shndx = SHN_V850_TCOMMON;
2156 else if (strcmp (input_sec->name, ".zcommon") == 0)
2157 sym->st_shndx = SHN_V850_ZCOMMON;
2164 v850_elf_section_from_shdr (abfd, hdr, name)
2166 Elf_Internal_Shdr * hdr;
2169 /* There ought to be a place to keep ELF backend specific flags, but
2170 at the moment there isn't one. We just keep track of the
2171 sections by their name, instead. */
2173 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2176 switch (hdr->sh_type)
2178 case SHT_V850_SCOMMON:
2179 case SHT_V850_TCOMMON:
2180 case SHT_V850_ZCOMMON:
2181 if (! bfd_set_section_flags (abfd, hdr->bfd_section,
2182 (bfd_get_section_flags (abfd,
2191 /* Set the correct type for a V850 ELF section. We do this
2192 by the section name, which is a hack, but ought to work. */
2195 v850_elf_fake_sections (abfd, hdr, sec)
2196 bfd * abfd ATTRIBUTE_UNUSED;
2197 Elf32_Internal_Shdr * hdr;
2200 register const char * name;
2202 name = bfd_get_section_name (abfd, sec);
2204 if (strcmp (name, ".scommon") == 0)
2206 hdr->sh_type = SHT_V850_SCOMMON;
2208 else if (strcmp (name, ".tcommon") == 0)
2210 hdr->sh_type = SHT_V850_TCOMMON;
2212 else if (strcmp (name, ".zcommon") == 0)
2213 hdr->sh_type = SHT_V850_ZCOMMON;
2218 #define TARGET_LITTLE_SYM bfd_elf32_v850_vec
2219 #define TARGET_LITTLE_NAME "elf32-v850"
2220 #define ELF_ARCH bfd_arch_v850
2221 #define ELF_MACHINE_CODE EM_V850
2222 #define ELF_MACHINE_ALT1 EM_CYGNUS_V850
2223 #define ELF_MAXPAGESIZE 0x1000
2225 #define elf_info_to_howto v850_elf_info_to_howto_rela
2226 #define elf_info_to_howto_rel v850_elf_info_to_howto_rel
2228 #define elf_backend_check_relocs v850_elf_check_relocs
2229 #define elf_backend_relocate_section v850_elf_relocate_section
2230 #define elf_backend_object_p v850_elf_object_p
2231 #define elf_backend_final_write_processing v850_elf_final_write_processing
2232 #define elf_backend_section_from_bfd_section v850_elf_section_from_bfd_section
2233 #define elf_backend_symbol_processing v850_elf_symbol_processing
2234 #define elf_backend_add_symbol_hook v850_elf_add_symbol_hook
2235 #define elf_backend_link_output_symbol_hook v850_elf_link_output_symbol_hook
2236 #define elf_backend_section_from_shdr v850_elf_section_from_shdr
2237 #define elf_backend_fake_sections v850_elf_fake_sections
2238 #define elf_backend_gc_mark_hook v850_elf_gc_mark_hook
2239 #define elf_backend_gc_sweep_hook v850_elf_gc_sweep_hook
2241 #define elf_backend_can_gc_sections 1
2243 #define bfd_elf32_bfd_is_local_label_name v850_elf_is_local_label_name
2244 #define bfd_elf32_bfd_reloc_type_lookup v850_elf_reloc_type_lookup
2245 #define bfd_elf32_bfd_copy_private_bfd_data v850_elf_copy_private_bfd_data
2246 #define bfd_elf32_bfd_merge_private_bfd_data v850_elf_merge_private_bfd_data
2247 #define bfd_elf32_bfd_set_private_flags v850_elf_set_private_flags
2248 #define bfd_elf32_bfd_print_private_bfd_data v850_elf_print_private_bfd_data
2250 #define elf_symbol_leading_char '_'
2252 #include "elf32-target.h"