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* targmatch.sed: Delete case statements.
[binutils.git] / bfd / elf32-v850.c
blob518073644e61c0c1cd9b730b214e97d08e5fb7b9
1 /* V850-specific support for 32-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
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.
11
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.
16
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. */
20
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. */
23
24 #include "bfd.h"
25 #include "sysdep.h"
26 #include "bfdlink.h"
27 #include "libbfd.h"
28 #include "elf-bfd.h"
29 #include "elf/v850.h"
30 #include "libiberty.h"
31
32 /* Sign-extend a 24-bit number. */
33 #define SEXT24(x) ((((x) & 0xffffff) ^ (~ 0x7fffff)) + 0x800000)
34
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
60 PARAMS ((bfd *));
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 *,
91 Elf_Internal_Sym *));
92
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[] =
96 {
97 /* This reloc does nothing. */
98 HOWTO (R_V850_NONE, /* type */
99 0, /* rightshift */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
101 32, /* bitsize */
102 false, /* pc_relative */
103 0, /* bitpos */
104 complain_overflow_bitfield, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_V850_NONE", /* name */
107 false, /* partial_inplace */
108 0, /* src_mask */
109 0, /* dst_mask */
110 false), /* pcrel_offset */
111
112 /* A PC relative 9 bit branch. */
113 HOWTO (R_V850_9_PCREL, /* type */
114 2, /* rightshift */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
116 26, /* bitsize */
117 true, /* pc_relative */
118 0, /* bitpos */
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 */
126
127 /* A PC relative 22 bit branch. */
128 HOWTO (R_V850_22_PCREL, /* type */
129 2, /* rightshift */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
131 22, /* bitsize */
132 true, /* pc_relative */
133 7, /* bitpos */
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 */
141
142 /* High 16 bits of symbol value. */
143 HOWTO (R_V850_HI16_S, /* type */
144 0, /* rightshift */
145 1, /* size (0 = byte, 1 = short, 2 = long) */
146 16, /* bitsize */
147 false, /* pc_relative */
148 0, /* bitpos */
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 */
156
157 /* High 16 bits of symbol value. */
158 HOWTO (R_V850_HI16, /* type */
159 0, /* rightshift */
160 1, /* size (0 = byte, 1 = short, 2 = long) */
161 16, /* bitsize */
162 false, /* pc_relative */
163 0, /* bitpos */
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 */
171
172 /* Low 16 bits of symbol value. */
173 HOWTO (R_V850_LO16, /* type */
174 0, /* rightshift */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
176 16, /* bitsize */
177 false, /* pc_relative */
178 0, /* bitpos */
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 */
186
187 /* Simple 32bit reloc. */
188 HOWTO (R_V850_32, /* type */
189 0, /* rightshift */
190 2, /* size (0 = byte, 1 = short, 2 = long) */
191 32, /* bitsize */
192 false, /* pc_relative */
193 0, /* bitpos */
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 */
201
202 /* Simple 16bit reloc. */
203 HOWTO (R_V850_16, /* type */
204 0, /* rightshift */
205 1, /* size (0 = byte, 1 = short, 2 = long) */
206 16, /* bitsize */
207 false, /* pc_relative */
208 0, /* bitpos */
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 */
216
217 /* Simple 8bit reloc. */
218 HOWTO (R_V850_8, /* type */
219 0, /* rightshift */
220 0, /* size (0 = byte, 1 = short, 2 = long) */
221 8, /* bitsize */
222 false, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_dont, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_V850_8", /* name */
227 false, /* partial_inplace */
228 0xff, /* src_mask */
229 0xff, /* dst_mask */
230 false), /* pcrel_offset */
231
232 /* 16 bit offset from the short data area pointer. */
233 HOWTO (R_V850_SDA_16_16_OFFSET, /* type */
234 0, /* rightshift */
235 1, /* size (0 = byte, 1 = short, 2 = long) */
236 16, /* bitsize */
237 false, /* pc_relative */
238 0, /* bitpos */
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 */
246
247 /* 15 bit offset from the short data area pointer. */
248 HOWTO (R_V850_SDA_15_16_OFFSET, /* type */
249 1, /* rightshift */
250 1, /* size (0 = byte, 1 = short, 2 = long) */
251 16, /* bitsize */
252 false, /* pc_relative */
253 1, /* bitpos */
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 */
261
262 /* 16 bit offset from the zero data area pointer. */
263 HOWTO (R_V850_ZDA_16_16_OFFSET, /* type */
264 0, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 false, /* pc_relative */
268 0, /* bitpos */
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 */
276
277 /* 15 bit offset from the zero data area pointer. */
278 HOWTO (R_V850_ZDA_15_16_OFFSET, /* type */
279 1, /* rightshift */
280 1, /* size (0 = byte, 1 = short, 2 = long) */
281 16, /* bitsize */
282 false, /* pc_relative */
283 1, /* bitpos */
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 */
291
292 /* 6 bit offset from the tiny data area pointer. */
293 HOWTO (R_V850_TDA_6_8_OFFSET, /* type */
294 2, /* rightshift */
295 1, /* size (0 = byte, 1 = short, 2 = long) */
296 8, /* bitsize */
297 false, /* pc_relative */
298 1, /* bitpos */
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 */
303 0x7e, /* src_mask */
304 0x7e, /* dst_mask */
305 false), /* pcrel_offset */
306
307 /* 8 bit offset from the tiny data area pointer. */
308 HOWTO (R_V850_TDA_7_8_OFFSET, /* type */
309 1, /* rightshift */
310 1, /* size (0 = byte, 1 = short, 2 = long) */
311 8, /* bitsize */
312 false, /* pc_relative */
313 0, /* bitpos */
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 */
318 0x7f, /* src_mask */
319 0x7f, /* dst_mask */
320 false), /* pcrel_offset */
321
322 /* 7 bit offset from the tiny data area pointer. */
323 HOWTO (R_V850_TDA_7_7_OFFSET, /* type */
324 0, /* rightshift */
325 1, /* size (0 = byte, 1 = short, 2 = long) */
326 7, /* bitsize */
327 false, /* pc_relative */
328 0, /* bitpos */
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 */
333 0x7f, /* src_mask */
334 0x7f, /* dst_mask */
335 false), /* pcrel_offset */
336
337 /* 16 bit offset from the tiny data area pointer! */
338 HOWTO (R_V850_TDA_16_16_OFFSET, /* type */
339 0, /* rightshift */
340 1, /* size (0 = byte, 1 = short, 2 = long) */
341 16, /* bitsize */
342 false, /* pc_relative */
343 0, /* bitpos */
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 */
351
352 /* 5 bit offset from the tiny data area pointer. */
353 HOWTO (R_V850_TDA_4_5_OFFSET, /* type */
354 1, /* rightshift */
355 1, /* size (0 = byte, 1 = short, 2 = long) */
356 5, /* bitsize */
357 false, /* pc_relative */
358 0, /* bitpos */
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 */
363 0x0f, /* src_mask */
364 0x0f, /* dst_mask */
365 false), /* pcrel_offset */
366
367 /* 4 bit offset from the tiny data area pointer. */
368 HOWTO (R_V850_TDA_4_4_OFFSET, /* type */
369 0, /* rightshift */
370 1, /* size (0 = byte, 1 = short, 2 = long) */
371 4, /* bitsize */
372 false, /* pc_relative */
373 0, /* bitpos */
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 */
378 0x0f, /* src_mask */
379 0x0f, /* dst_mask */
380 false), /* pcrel_offset */
381
382 /* 16 bit offset from the short data area pointer. */
383 HOWTO (R_V850_SDA_16_16_SPLIT_OFFSET, /* type */
384 0, /* rightshift */
385 2, /* size (0 = byte, 1 = short, 2 = long) */
386 16, /* bitsize */
387 false, /* pc_relative */
388 0, /* bitpos */
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 */
396
397 /* 16 bit offset from the zero data area pointer. */
398 HOWTO (R_V850_ZDA_16_16_SPLIT_OFFSET, /* type */
399 0, /* rightshift */
400 2, /* size (0 = byte, 1 = short, 2 = long) */
401 16, /* bitsize */
402 false, /* pc_relative */
403 0, /* bitpos */
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 */
411
412 /* 6 bit offset from the call table base pointer. */
413 HOWTO (R_V850_CALLT_6_7_OFFSET, /* type */
414 0, /* rightshift */
415 1, /* size (0 = byte, 1 = short, 2 = long) */
416 7, /* bitsize */
417 false, /* pc_relative */
418 0, /* bitpos */
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 */
423 0x3f, /* src_mask */
424 0x3f, /* dst_mask */
425 false), /* pcrel_offset */
426
427 /* 16 bit offset from the call table base pointer. */
428 HOWTO (R_V850_CALLT_16_16_OFFSET, /* type */
429 0, /* rightshift */
430 1, /* size (0 = byte, 1 = short, 2 = long) */
431 16, /* bitsize */
432 false, /* pc_relative */
433 0, /* bitpos */
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 */
441
442 /* GNU extension to record C++ vtable hierarchy */
443 HOWTO (R_V850_GNU_VTINHERIT, /* type */
444 0, /* rightshift */
445 2, /* size (0 = byte, 1 = short, 2 = long) */
446 0, /* bitsize */
447 false, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_dont, /* complain_on_overflow */
450 NULL, /* special_function */
451 "R_V850_GNU_VTINHERIT", /* name */
452 false, /* partial_inplace */
453 0, /* src_mask */
454 0, /* dst_mask */
455 false), /* pcrel_offset */
456
457 /* GNU extension to record C++ vtable member usage */
458 HOWTO (R_V850_GNU_VTENTRY, /* type */
459 0, /* rightshift */
460 2, /* size (0 = byte, 1 = short, 2 = long) */
461 0, /* bitsize */
462 false, /* pc_relative */
463 0, /* bitpos */
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 */
468 0, /* src_mask */
469 0, /* dst_mask */
470 false), /* pcrel_offset */
471
472 };
473
474 /* Map BFD reloc types to V850 ELF reloc types. */
475
476 struct v850_elf_reloc_map
477 {
478 /* BFD_RELOC_V850_CALLT_16_16_OFFSET is 258, which will not fix in an
479 unsigned char. */
480 bfd_reloc_code_real_type bfd_reloc_val;
481 unsigned int elf_reloc_val;
482 };
483
484 static const struct v850_elf_reloc_map v850_elf_reloc_map[] =
485 {
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 },
511
512 };
513 \f
514 /* Map a bfd relocation into the appropriate howto structure. */
515
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;
520 {
521 unsigned int i;
522
523 for (i = ARRAY_SIZE (v850_elf_reloc_map); i --;)
524 if (v850_elf_reloc_map[i].bfd_reloc_val == code)
525 {
526 unsigned int elf_reloc_val = v850_elf_reloc_map[i].elf_reloc_val;
527
528 BFD_ASSERT (v850_elf_howto_table[elf_reloc_val].type == elf_reloc_val);
529
530 return v850_elf_howto_table + elf_reloc_val;
531 }
532
533 return NULL;
534 }
535 \f
536 /* Set the howto pointer for an V850 ELF reloc. */
537
538 static void
539 v850_elf_info_to_howto_rel (abfd, cache_ptr, dst)
540 bfd * abfd ATTRIBUTE_UNUSED;
541 arelent * cache_ptr;
542 Elf32_Internal_Rel * dst;
543 {
544 unsigned int r_type;
545
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];
549 }
550
551 /* Set the howto pointer for a V850 ELF reloc (type RELA). */
552 static void
553 v850_elf_info_to_howto_rela (abfd, cache_ptr, dst)
554 bfd * abfd ATTRIBUTE_UNUSED;
555 arelent * cache_ptr;
556 Elf32_Internal_Rela *dst;
557 {
558 unsigned int r_type;
559
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];
563 }
564 \f
565 /* Look through the relocs for a section during the first phase, and
566 allocate space in the global offset table or procedure linkage
567 table. */
568
569 static boolean
570 v850_elf_check_relocs (abfd, info, sec, relocs)
571 bfd * abfd;
572 struct bfd_link_info * info;
573 asection * sec;
574 const Elf_Internal_Rela * relocs;
575 {
576 boolean ret = true;
577 bfd *dynobj;
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;
582 asection *sreloc;
583 enum v850_reloc_type r_type;
584 int other = 0;
585 const char *common = (const char *)0;
586
587 if (info->relocateable)
588 return true;
589
590 #ifdef DEBUG
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));
594 #endif
595
596 dynobj = elf_hash_table (info)->dynobj;
597 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
598 sym_hashes = elf_sym_hashes (abfd);
599 sreloc = NULL;
600
601 rel_end = relocs + sec->reloc_count;
602 for (rel = relocs; rel < rel_end; rel++)
603 {
604 unsigned long r_symndx;
605 struct elf_link_hash_entry *h;
606
607 r_symndx = ELF32_R_SYM (rel->r_info);
608 if (r_symndx < symtab_hdr->sh_info)
609 h = NULL;
610 else
611 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
612
613 r_type = (enum v850_reloc_type) ELF32_R_TYPE (rel->r_info);
614 switch (r_type)
615 {
616 default:
617 case R_V850_NONE:
618 case R_V850_9_PCREL:
619 case R_V850_22_PCREL:
620 case R_V850_HI16_S:
621 case R_V850_HI16:
622 case R_V850_LO16:
623 case R_V850_32:
624 case R_V850_16:
625 case R_V850_8:
626 case R_V850_CALLT_6_7_OFFSET:
627 case R_V850_CALLT_16_16_OFFSET:
628 break;
629
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))
634 return false;
635 break;
636
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))
641 return false;
642 break;
643
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;
648 common = ".scommon";
649 goto small_data_common;
650
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;
655 common = ".zcommon";
656 goto small_data_common;
657
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;
665 common = ".tcommon";
666 /* fall through */
667
668 #define V850_OTHER_MASK (V850_OTHER_TDA | V850_OTHER_SDA | V850_OTHER_ZDA)
669
670 small_data_common:
671 if (h)
672 {
673 /* Flag which type of relocation was used. */
674 h->other |= other;
675 if ((h->other & V850_OTHER_MASK) != (other & V850_OTHER_MASK)
676 && (h->other & V850_OTHER_ERROR) == 0)
677 {
678 const char * msg;
679 static char buff[200]; /* XXX */
680
681 switch (h->other & V850_OTHER_MASK)
682 {
683 default:
684 msg = _("Variable `%s' cannot occupy in multiple small data regions");
685 break;
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");
688 break;
689 case V850_OTHER_SDA | V850_OTHER_ZDA:
690 msg = _("Variable `%s' cannot be in both small and zero data regions simultaneously");
691 break;
692 case V850_OTHER_SDA | V850_OTHER_TDA:
693 msg = _("Variable `%s' cannot be in both small and tiny data regions simultaneously");
694 break;
695 case V850_OTHER_ZDA | V850_OTHER_TDA:
696 msg = _("Variable `%s' cannot be in both zero and tiny data regions simultaneously");
697 break;
698 }
699
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);
703
704 bfd_set_error (bfd_error_bad_value);
705 h->other |= V850_OTHER_ERROR;
706 ret = false;
707 }
708 }
709
710 if (h && h->root.type == bfd_link_hash_common
711 && h->root.u.c.p
712 && !strcmp (bfd_get_section_name (abfd, h->root.u.c.p->section), "COMMON"))
713 {
714 asection * section;
715
716 section = h->root.u.c.p->section = bfd_make_section_old_way (abfd, common);
717 section->flags |= SEC_IS_COMMON;
718 }
719
720 #ifdef DEBUG
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" : "");
725 #endif
726 break;
727 }
728 }
729
730 return ret;
731 }
732
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.
736
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.
741
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. */
745
746 typedef struct hi16s_location
747 {
748 bfd_vma addend;
749 bfd_byte * address;
750 unsigned long counter;
751 boolean found;
752 struct hi16s_location * next;
753 }
754 hi16s_location;
755
756 static hi16s_location * previous_hi16s;
757 static hi16s_location * free_hi16s;
758 static unsigned long hi16s_counter;
759
760 static void
761 remember_hi16s_reloc (abfd, addend, address)
762 bfd * abfd;
763 bfd_vma addend;
764 bfd_byte * address;
765 {
766 hi16s_location * entry = NULL;
767
768 /* Find a free structure. */
769 if (free_hi16s == NULL)
770 free_hi16s = (hi16s_location *) bfd_zalloc (abfd, sizeof (* free_hi16s));
771
772 entry = free_hi16s;
773 free_hi16s = free_hi16s->next;
774
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;
781
782 /* Cope with wrap around of our counter. */
783 if (hi16s_counter == 0)
784 {
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;
788
789 hi16s_counter = 0x10000;
790 }
791
792 return;
793 }
794
795 static bfd_byte *
796 find_remembered_hi16s_reloc (addend, already_found)
797 bfd_vma addend;
798 boolean * already_found;
799 {
800 hi16s_location * match = NULL;
801 hi16s_location * entry;
802 hi16s_location * previous = NULL;
803 hi16s_location * prev;
804 bfd_byte * addr;
805
806 /* Search the table. Record the most recent entry that matches. */
807 for (entry = previous_hi16s; entry; entry = entry->next)
808 {
809 if (entry->addend == addend
810 && (match == NULL || match->counter < entry->counter))
811 {
812 previous = prev;
813 match = entry;
814 }
815
816 prev = entry;
817 }
818
819 if (match == NULL)
820 return NULL;
821
822 /* Extract the address. */
823 addr = match->address;
824
825 /* Remeber if this entry has already been used before. */
826 if (already_found)
827 * already_found = match->found;
828
829 /* Note that this entry has now been used. */
830 match->found = true;
831
832 return addr;
833 }
834
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. */
837
838 static bfd_reloc_status_type
839 v850_elf_perform_relocation (abfd, r_type, addend, address)
840 bfd * abfd;
841 int r_type;
842 bfd_vma addend;
843 bfd_byte * address;
844 {
845 unsigned long insn;
846 bfd_signed_vma saddend = (bfd_signed_vma) addend;
847
848 switch (r_type)
849 {
850 default:
851 /* fprintf (stderr, "reloc type %d not SUPPORTED\n", r_type ); */
852 return bfd_reloc_notsupported;
853
854 case R_V850_32:
855 bfd_put_32 (abfd, addend, address);
856 return bfd_reloc_ok;
857
858 case R_V850_22_PCREL:
859 if (saddend > 0x1fffff || saddend < -0x200000)
860 return bfd_reloc_overflow;
861
862 if ((addend % 2) != 0)
863 return bfd_reloc_dangerous;
864
865 insn = bfd_get_32 (abfd, address);
866 insn &= ~0xfffe003f;
867 insn |= (((addend & 0xfffe) << 16) | ((addend & 0x3f0000) >> 16));
868 bfd_put_32 (abfd, insn, address);
869 return bfd_reloc_ok;
870
871 case R_V850_9_PCREL:
872 if (saddend > 0xff || saddend < -0x100)
873 return bfd_reloc_overflow;
874
875 if ((addend % 2) != 0)
876 return bfd_reloc_dangerous;
877
878 insn = bfd_get_16 (abfd, address);
879 insn &= ~ 0xf870;
880 insn |= ((addend & 0x1f0) << 7) | ((addend & 0x0e) << 3);
881 break;
882
883 case R_V850_HI16:
884 addend += (bfd_get_16 (abfd, address) << 16);
885 addend = (addend >> 16);
886 insn = addend;
887 break;
888
889 case R_V850_HI16_S:
890 /* Remember where this relocation took place. */
891 remember_hi16s_reloc (abfd, addend, address);
892
893 addend += (bfd_get_16 (abfd, address) << 16);
894 addend = (addend >> 16) + ((addend & 0x8000) != 0);
895
896 /* This relocation cannot overflow. */
897 if (addend > 0x7fff)
898 addend = 0;
899
900 insn = addend;
901 break;
902
903 case R_V850_LO16:
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
910 relocations:
911
912 movhi hi( fred ), r0, r1
913 movea lo( fred ), r1, r1
914
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:
917
918 movhi hi( fred + 0x123456), r0, r1
919 movea lo( fred + 0x123456), r1, r1
920
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
923 instructions were:
924
925 movhi hi( fred + 0x10ffff), r0, r1
926 movea lo( fred + 0x10ffff), r1, r1
927
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:
934
935 movhi hi( fred - 1), r0, r1
936 movea lo( fred - 1), r1, r1
937
938 then 0 is stored in the MOVHI instruction and -1 is stored in the
939 MOVEA instruction.
940
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:
947
948 movhi hi( fred + 0x123456), r0, r1
949 movea lo( fred + 0x123456), r1, r1
950
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:
954
955 HI16S: 0x0012 + (0x00007000 >> 16) = 0x12
956 LO16: 0x3456 + (0x00007000 & 0xffff) = 0xa456
957
958 but when the instructions are executed, the MOVEA instruction's value
959 is signed extended, so the sum becomes:
960
961 0x00120000
962 + 0xffffa456
963 ------------
964 0x0011a456 but 'fred + 0x123456' = 0x0012a456
965
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:
968
969 movhi hi( fred + 0x10ffff), r0, r1
970 movea lo( fred + 0x10ffff), r1, r1
971
972 HI16S: 0x0011 + (0x00007000 >> 16) = 0x11
973 LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff
974
975 0x00110000
976 + 0x00006fff
977 ------------
978 0x00116fff = fred + 0x10ffff = 0x7000 + 0x10ffff
979
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.
987
988 So, for example if fred is at address 0xf000:
989
990 movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set]
991 movea lo( fred + 0xffff), r1, r1
992
993 HI16S: 0x0001 + (0x0000f000 >> 16) = 0x0001
994 LO16: 0xffff + (0x0000f000 & 0xffff) = 0xefff (carry into bit 16 is lost)
995
996 0x00010000
997 + 0xffffefff
998 ------------
999 0x0000efff but 'fred + 0xffff' = 0x0001efff
1000
1001 Similarly, if the 15th bit remains clear, but overflow occurs into
1002 the 16th bit then (assuming the address of fred is 0xf000):
1003
1004 movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear]
1005 movea lo( fred + 0x7000), r1, r1
1006
1007 HI16S: 0x0000 + (0x0000f000 >> 16) = 0x0000
1008 LO16: 0x7000 + (0x0000f000 & 0xffff) = 0x6fff (carry into bit 16 is lost)
1009
1010 0x00000000
1011 + 0x00006fff
1012 ------------
1013 0x00006fff but 'fred + 0x7000' = 0x00016fff
1014
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:
1018
1019 movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set]
1020 movea lo( fred + 0xffff), r1, r1
1021
1022 HI16S: 0x0001 + (0x00007000 >> 16)
1023 LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff (carry into bit 16 is lost)
1024
1025 0x00010000
1026 + 0x00006fff (bit 15 not set, so the top half is zero)
1027 ------------
1028 0x00016fff which is right (assuming that fred is at 0x7000)
1029
1030 but if the 15th bit goes from being clear to being set, then we must
1031 once again handle overflow:
1032
1033 movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear]
1034 movea lo( fred + 0x7000), r1, r1
1035
1036 HI16S: 0x0000 + (0x0000ffff >> 16)
1037 LO16: 0x7000 + (0x0000ffff & 0xffff) = 0x6fff (carry into bit 16)
1038
1039 0x00000000
1040 + 0x00006fff (bit 15 not set, so the top half is zero)
1041 ------------
1042 0x00006fff which is wrong (assuming that fred is at 0xffff). */
1043 {
1044 long result;
1045
1046 insn = bfd_get_16 (abfd, address);
1047 result = insn + addend;
1048
1049 #define BIT15_SET(x) ((x) & 0x8000)
1050 #define OVERFLOWS(a,i) ((((a) & 0xffff) + (i)) > 0xffff)
1051
1052 if ((BIT15_SET (result) && ! BIT15_SET (addend))
1053 || (OVERFLOWS (addend, insn)
1054 && ((! BIT15_SET (insn)) || (BIT15_SET (addend)))))
1055 {
1056 boolean already_updated;
1057 bfd_byte * hi16s_address = find_remembered_hi16s_reloc
1058 (addend, & already_updated);
1059
1060 /* Amend the matching HI16_S relocation. */
1061 if (hi16s_address != NULL)
1062 {
1063 if (! already_updated)
1064 {
1065 insn = bfd_get_16 (abfd, hi16s_address);
1066 insn += 1;
1067 bfd_put_16 (abfd, insn, hi16s_address);
1068 }
1069 }
1070 else
1071 {
1072 fprintf (stderr, _("FAILED to find previous HI16 reloc\n"));
1073 return bfd_reloc_overflow;
1074 }
1075 }
1076
1077 /* Do not complain if value has top bit set, as this has been anticipated. */
1078 insn = result & 0xffff;
1079 break;
1080 }
1081
1082 case R_V850_8:
1083 addend += (char) bfd_get_8 (abfd, address);
1084
1085 saddend = (bfd_signed_vma) addend;
1086
1087 if (saddend > 0x7f || saddend < -0x80)
1088 return bfd_reloc_overflow;
1089
1090 bfd_put_8 (abfd, addend, address);
1091 return bfd_reloc_ok;
1092
1093 case R_V850_CALLT_16_16_OFFSET:
1094 addend += bfd_get_16 (abfd, address);
1095
1096 saddend = (bfd_signed_vma) addend;
1097
1098 if (saddend > 0xffff || saddend < 0)
1099 return bfd_reloc_overflow;
1100
1101 insn = addend;
1102 break;
1103
1104 case R_V850_16:
1105
1106 /* drop through */
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);
1111
1112 saddend = (bfd_signed_vma) addend;
1113
1114 if (saddend > 0x7fff || saddend < -0x8000)
1115 return bfd_reloc_overflow;
1116
1117 insn = addend;
1118 break;
1119
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);
1124
1125 saddend = (bfd_signed_vma) addend;
1126
1127 if (saddend > 0x7ffe || saddend < -0x8000)
1128 return bfd_reloc_overflow;
1129
1130 if (addend & 1)
1131 return bfd_reloc_dangerous;
1132
1133 insn = (addend & ~1) | (insn & 1);
1134 break;
1135
1136 case R_V850_TDA_6_8_OFFSET:
1137 insn = bfd_get_16 (abfd, address);
1138 addend += ((insn & 0x7e) << 1);
1139
1140 saddend = (bfd_signed_vma) addend;
1141
1142 if (saddend > 0xfc || saddend < 0)
1143 return bfd_reloc_overflow;
1144
1145 if (addend & 3)
1146 return bfd_reloc_dangerous;
1147
1148 insn &= 0xff81;
1149 insn |= (addend >> 1);
1150 break;
1151
1152 case R_V850_TDA_7_8_OFFSET:
1153 insn = bfd_get_16 (abfd, address);
1154 addend += ((insn & 0x7f) << 1);
1155
1156 saddend = (bfd_signed_vma) addend;
1157
1158 if (saddend > 0xfe || saddend < 0)
1159 return bfd_reloc_overflow;
1160
1161 if (addend & 1)
1162 return bfd_reloc_dangerous;
1163
1164 insn &= 0xff80;
1165 insn |= (addend >> 1);
1166 break;
1167
1168 case R_V850_TDA_7_7_OFFSET:
1169 insn = bfd_get_16 (abfd, address);
1170 addend += insn & 0x7f;
1171
1172 saddend = (bfd_signed_vma) addend;
1173
1174 if (saddend > 0x7f || saddend < 0)
1175 return bfd_reloc_overflow;
1176
1177 insn &= 0xff80;
1178 insn |= addend;
1179 break;
1180
1181 case R_V850_TDA_4_5_OFFSET:
1182 insn = bfd_get_16 (abfd, address);
1183 addend += ((insn & 0xf) << 1);
1184
1185 saddend = (bfd_signed_vma) addend;
1186
1187 if (saddend > 0x1e || saddend < 0)
1188 return bfd_reloc_overflow;
1189
1190 if (addend & 1)
1191 return bfd_reloc_dangerous;
1192
1193 insn &= 0xfff0;
1194 insn |= (addend >> 1);
1195 break;
1196
1197 case R_V850_TDA_4_4_OFFSET:
1198 insn = bfd_get_16 (abfd, address);
1199 addend += insn & 0xf;
1200
1201 saddend = (bfd_signed_vma) addend;
1202
1203 if (saddend > 0xf || saddend < 0)
1204 return bfd_reloc_overflow;
1205
1206 insn &= 0xfff0;
1207 insn |= addend;
1208 break;
1209
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);
1214
1215 saddend = (bfd_signed_vma) addend;
1216
1217 if (saddend > 0x7fff || saddend < -0x8000)
1218 return bfd_reloc_overflow;
1219
1220 insn &= 0x0001ffdf;
1221 insn |= (addend & 1) << 5;
1222 insn |= (addend & ~1) << 16;
1223
1224 bfd_put_32 (abfd, insn, address);
1225 return bfd_reloc_ok;
1226
1227 case R_V850_CALLT_6_7_OFFSET:
1228 insn = bfd_get_16 (abfd, address);
1229 addend += ((insn & 0x3f) << 1);
1230
1231 saddend = (bfd_signed_vma) addend;
1232
1233 if (saddend > 0x7e || saddend < 0)
1234 return bfd_reloc_overflow;
1235
1236 if (addend & 1)
1237 return bfd_reloc_dangerous;
1238
1239 insn &= 0xff80;
1240 insn |= (addend >> 1);
1241 break;
1242
1243 case R_V850_GNU_VTINHERIT:
1244 case R_V850_GNU_VTENTRY:
1245 return bfd_reloc_ok;
1246
1247 }
1248
1249 bfd_put_16 (abfd, insn, address);
1250 return bfd_reloc_ok;
1251 }
1252 \f
1253 /* Insert the addend into the instruction. */
1254
1255 static bfd_reloc_status_type
1256 v850_elf_reloc (abfd, reloc, symbol, data, isection, obfd, err)
1257 bfd * abfd ATTRIBUTE_UNUSED;
1258 arelent * reloc;
1259 asymbol * symbol;
1260 PTR data ATTRIBUTE_UNUSED;
1261 asection * isection;
1262 bfd * obfd;
1263 char ** err ATTRIBUTE_UNUSED;
1264 {
1265 long relocation;
1266
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))
1276 {
1277 reloc->address += isection->output_offset;
1278 return bfd_reloc_ok;
1279 }
1280 #if 0
1281 else if (obfd != NULL)
1282 return bfd_reloc_continue;
1283 #endif
1284
1285 /* Catch relocs involving undefined symbols. */
1286 if (bfd_is_und_section (symbol->section)
1287 && (symbol->flags & BSF_WEAK) == 0
1288 && obfd == NULL)
1289 return bfd_reloc_undefined;
1290
1291 /* We handle final linking of some relocs ourselves. */
1292
1293 /* Is the address of the relocation really within the section? */
1294 if (reloc->address > isection->_cooked_size)
1295 return bfd_reloc_outofrange;
1296
1297 /* Work out which section the relocation is targetted at and the
1298 initial relocation command value. */
1299
1300 /* Get symbol value. (Common symbols are special.) */
1301 if (bfd_is_com_section (symbol->section))
1302 relocation = 0;
1303 else
1304 relocation = symbol->value;
1305
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;
1310
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:
1314
1315 .text
1316 .globl _start
1317 nop
1318 _start:
1319 jr foo
1320
1321 .section ".foo","ax"
1322 nop
1323 foo:
1324 nop */
1325 if (reloc->howto->pc_relative == true)
1326 {
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;
1330
1331 /* Deal with pcrel_offset. */
1332 relocation -= reloc->address;
1333 }
1334 #endif
1335 reloc->addend = relocation;
1336 return bfd_reloc_ok;
1337 }
1338 \f
1339 static boolean
1340 v850_elf_is_local_label_name (abfd, name)
1341 bfd * abfd ATTRIBUTE_UNUSED;
1342 const char * name;
1343 {
1344 return ( (name[0] == '.' && (name[1] == 'L' || name[1] == '.'))
1345 || (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_'));
1346 }
1347 \f
1348 /* Perform a relocation as part of a final link. */
1349
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;
1355 bfd * input_bfd;
1356 bfd * output_bfd ATTRIBUTE_UNUSED;
1357 asection * input_section;
1358 bfd_byte * contents;
1359 bfd_vma offset;
1360 bfd_vma value;
1361 bfd_vma addend;
1362 struct bfd_link_info * info;
1363 asection * sym_sec;
1364 int is_local ATTRIBUTE_UNUSED;
1365 {
1366 unsigned long r_type = howto->type;
1367 bfd_byte * hit_data = contents + offset;
1368
1369 /* Adjust the value according to the relocation. */
1370 switch (r_type)
1371 {
1372 case R_V850_9_PCREL:
1373 value -= (input_section->output_section->vma
1374 + input_section->output_offset);
1375 value -= offset;
1376 break;
1377
1378 case R_V850_22_PCREL:
1379 value -= (input_section->output_section->vma
1380 + input_section->output_offset
1381 + offset);
1382
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;
1386
1387 /* Only the bottom 24 bits of the PC are valid */
1388 value = SEXT24 (value);
1389 break;
1390
1391 case R_V850_HI16_S:
1392 case R_V850_HI16:
1393 case R_V850_LO16:
1394 case R_V850_16:
1395 case R_V850_32:
1396 case R_V850_8:
1397 break;
1398
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;
1404
1405 value -= sym_sec->output_section->vma;
1406 break;
1407
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:
1411 {
1412 unsigned long gp;
1413 struct bfd_link_hash_entry * h;
1414
1415 if (sym_sec == NULL)
1416 return bfd_reloc_undefined;
1417
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;
1423
1424 gp = (h->u.def.value
1425 + h->u.def.section->output_section->vma
1426 + h->u.def.section->output_offset);
1427
1428 value -= sym_sec->output_section->vma;
1429 value -= (gp - sym_sec->output_section->vma);
1430 }
1431 break;
1432
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:
1439 {
1440 unsigned long ep;
1441 struct bfd_link_hash_entry * h;
1442
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;
1449
1450 ep = (h->u.def.value
1451 + h->u.def.section->output_section->vma
1452 + h->u.def.section->output_offset);
1453
1454 value -= ep;
1455 }
1456 break;
1457
1458 case R_V850_CALLT_6_7_OFFSET:
1459 {
1460 unsigned long ctbp;
1461 struct bfd_link_hash_entry * h;
1462
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;
1469
1470 ctbp = (h->u.def.value
1471 + h->u.def.section->output_section->vma
1472 + h->u.def.section->output_offset);
1473 value -= ctbp;
1474 }
1475 break;
1476
1477 case R_V850_CALLT_16_16_OFFSET:
1478 {
1479 unsigned long ctbp;
1480 struct bfd_link_hash_entry * h;
1481
1482 if (sym_sec == NULL)
1483 return bfd_reloc_undefined;
1484
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);
1490
1491 ctbp = (h->u.def.value
1492 + h->u.def.section->output_section->vma
1493 + h->u.def.section->output_offset);
1494
1495 value -= sym_sec->output_section->vma;
1496 value -= (ctbp - sym_sec->output_section->vma);
1497 }
1498 break;
1499
1500 case R_V850_NONE:
1501 case R_V850_GNU_VTINHERIT:
1502 case R_V850_GNU_VTENTRY:
1503 return bfd_reloc_ok;
1504
1505 default:
1506 return bfd_reloc_notsupported;
1507 }
1508
1509 /* Perform the relocation. */
1510 return v850_elf_perform_relocation (input_bfd, r_type, value + addend, hit_data);
1511 }
1512 \f
1513 /* Relocate an V850 ELF section. */
1514
1515 static boolean
1516 v850_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1517 contents, relocs, local_syms, local_sections)
1518 bfd * output_bfd;
1519 struct bfd_link_info * info;
1520 bfd * input_bfd;
1521 asection * input_section;
1522 bfd_byte * contents;
1523 Elf_Internal_Rela * relocs;
1524 Elf_Internal_Sym * local_syms;
1525 asection ** local_sections;
1526 {
1527 Elf_Internal_Shdr * symtab_hdr;
1528 struct elf_link_hash_entry ** sym_hashes;
1529 Elf_Internal_Rela * rel;
1530 Elf_Internal_Rela * relend;
1531
1532 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1533 sym_hashes = elf_sym_hashes (input_bfd);
1534
1535 if (sym_hashes == NULL)
1536 {
1537 info->callbacks->warning
1538 (info, "no hash table available", NULL, input_bfd, input_section, 0);
1539
1540 return false;
1541 }
1542
1543 /* Reset the list of remembered HI16S relocs to empty. */
1544 free_hi16s = previous_hi16s;
1545 previous_hi16s = NULL;
1546 hi16s_counter = 0;
1547
1548 rel = relocs;
1549 relend = relocs + input_section->reloc_count;
1550 for (; rel < relend; rel++)
1551 {
1552 int r_type;
1553 reloc_howto_type * howto;
1554 unsigned long r_symndx;
1555 Elf_Internal_Sym * sym;
1556 asection * sec;
1557 struct elf_link_hash_entry * h;
1558 bfd_vma relocation;
1559 bfd_reloc_status_type r;
1560
1561 r_symndx = ELF32_R_SYM (rel->r_info);
1562 r_type = ELF32_R_TYPE (rel->r_info);
1563
1564 if (r_type == R_V850_GNU_VTENTRY
1565 || r_type == R_V850_GNU_VTINHERIT)
1566 continue;
1567
1568 howto = v850_elf_howto_table + r_type;
1569
1570 if (info->relocateable)
1571 {
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)
1577 {
1578 sym = local_syms + r_symndx;
1579 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1580 {
1581 sec = local_sections[r_symndx];
1582 rel->r_addend += sec->output_offset + sym->st_value;
1583 }
1584 }
1585
1586 continue;
1587 }
1588
1589 /* This is a final link. */
1590 h = NULL;
1591 sym = NULL;
1592 sec = NULL;
1593 if (r_symndx < symtab_hdr->sh_info)
1594 {
1595 sym = local_syms + r_symndx;
1596 sec = local_sections[r_symndx];
1597 relocation = (sec->output_section->vma
1598 + sec->output_offset
1599 + sym->st_value);
1600 #if 0
1601 {
1602 char * name;
1603
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);
1609 }
1610 #endif
1611 }
1612 else
1613 {
1614 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1615
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;
1619
1620 if (h->root.type == bfd_link_hash_defined
1621 || h->root.type == bfd_link_hash_defweak)
1622 {
1623 sec = h->root.u.def.section;
1624 relocation = (h->root.u.def.value
1625 + sec->output_section->vma
1626 + sec->output_offset);
1627 #if 0
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);
1630 #endif
1631 }
1632 else if (h->root.type == bfd_link_hash_undefweak)
1633 {
1634 #if 0
1635 fprintf (stderr, "undefined: sec: %s, name: %s\n",
1636 sec->name, h->root.root.string);
1637 #endif
1638 relocation = 0;
1639 }
1640 else
1641 {
1642 if (! ((*info->callbacks->undefined_symbol)
1643 (info, h->root.root.string, input_bfd,
1644 input_section, rel->r_offset, true)))
1645 return false;
1646 #if 0
1647 fprintf (stderr, "unknown: name: %s\n", h->root.root.string);
1648 #endif
1649 relocation = 0;
1650 }
1651 }
1652
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,
1655 input_section,
1656 contents, rel->r_offset,
1657 relocation, rel->r_addend,
1658 info, sec, h == NULL);
1659
1660 if (r != bfd_reloc_ok)
1661 {
1662 const char * name;
1663 const char * msg = (const char *)0;
1664
1665 if (h != NULL)
1666 name = h->root.root.string;
1667 else
1668 {
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);
1673 }
1674
1675 switch (r)
1676 {
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)))
1681 return false;
1682 break;
1683
1684 case bfd_reloc_undefined:
1685 if (! ((*info->callbacks->undefined_symbol)
1686 (info, name, input_bfd, input_section,
1687 rel->r_offset, true)))
1688 return false;
1689 break;
1690
1691 case bfd_reloc_outofrange:
1692 msg = _("internal error: out of range error");
1693 goto common_error;
1694
1695 case bfd_reloc_notsupported:
1696 msg = _("internal error: unsupported relocation error");
1697 goto common_error;
1698
1699 case bfd_reloc_dangerous:
1700 msg = _("internal error: dangerous relocation");
1701 goto common_error;
1702
1703 case bfd_reloc_other:
1704 msg = _("could not locate special linker symbol __gp");
1705 goto common_error;
1706
1707 case bfd_reloc_continue:
1708 msg = _("could not locate special linker symbol __ep");
1709 goto common_error;
1710
1711 case (bfd_reloc_dangerous + 1):
1712 msg = _("could not locate special linker symbol __ctbp");
1713 goto common_error;
1714
1715 default:
1716 msg = _("internal error: unknown error");
1717 /* fall through */
1718
1719 common_error:
1720 if (!((*info->callbacks->warning)
1721 (info, msg, name, input_bfd, input_section,
1722 rel->r_offset)))
1723 return false;
1724 break;
1725 }
1726 }
1727 }
1728
1729 return true;
1730 }
1731
1732 static boolean
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;
1738 {
1739 /* No got and plt entries for v850-elf. */
1740 return true;
1741 }
1742
1743 static asection *
1744 v850_elf_gc_mark_hook (abfd, info, rel, h, sym)
1745 bfd *abfd;
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;
1750 {
1751 if (h != NULL)
1752 {
1753 switch (ELF32_R_TYPE (rel->r_info))
1754 {
1755 case R_V850_GNU_VTINHERIT:
1756 case R_V850_GNU_VTENTRY:
1757 break;
1758
1759 default:
1760 switch (h->root.type)
1761 {
1762 case bfd_link_hash_defined:
1763 case bfd_link_hash_defweak:
1764 return h->root.u.def.section;
1765
1766 case bfd_link_hash_common:
1767 return h->root.u.c.p->section;
1768
1769 default:
1770 break;
1771 }
1772 }
1773 }
1774 else
1775 {
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))
1780 {
1781 return bfd_section_from_elf_index (abfd, sym->st_shndx);
1782 }
1783 }
1784 return NULL;
1785 }
1786
1787 /* Set the right machine number. */
1788
1789 static boolean
1790 v850_elf_object_p (abfd)
1791 bfd *abfd;
1792 {
1793 switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH)
1794 {
1795 default:
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;
1799 }
1800 return true;
1801 }
1802
1803 /* Store the machine number in the flags field. */
1804
1805 static void
1806 v850_elf_final_write_processing (abfd, linker)
1807 bfd * abfd;
1808 boolean linker ATTRIBUTE_UNUSED;
1809 {
1810 unsigned long val;
1811
1812 switch (bfd_get_mach (abfd))
1813 {
1814 default:
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;
1818 }
1819
1820 elf_elfheader (abfd)->e_flags &=~ EF_V850_ARCH;
1821 elf_elfheader (abfd)->e_flags |= val;
1822 }
1823
1824 /* Function to keep V850 specific file flags. */
1825
1826 static boolean
1827 v850_elf_set_private_flags (abfd, flags)
1828 bfd * abfd;
1829 flagword flags;
1830 {
1831 BFD_ASSERT (!elf_flags_init (abfd)
1832 || elf_elfheader (abfd)->e_flags == flags);
1833
1834 elf_elfheader (abfd)->e_flags = flags;
1835 elf_flags_init (abfd) = true;
1836 return true;
1837 }
1838
1839 /* Copy backend specific data from one object module to another. */
1840
1841 static boolean
1842 v850_elf_copy_private_bfd_data (ibfd, obfd)
1843 bfd * ibfd;
1844 bfd * obfd;
1845 {
1846 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1847 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1848 return true;
1849
1850 BFD_ASSERT (!elf_flags_init (obfd)
1851 || (elf_elfheader (obfd)->e_flags
1852 == elf_elfheader (ibfd)->e_flags));
1853
1854 elf_gp (obfd) = elf_gp (ibfd);
1855 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1856 elf_flags_init (obfd) = true;
1857
1858 return true;
1859 }
1860
1861 /* Merge backend specific data from an object file
1862 to the output object file when linking. */
1863 static boolean
1864 v850_elf_merge_private_bfd_data (ibfd, obfd)
1865 bfd * ibfd;
1866 bfd * obfd;
1867 {
1868 flagword out_flags;
1869 flagword in_flags;
1870
1871 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1872 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1873 return true;
1874
1875 in_flags = elf_elfheader (ibfd)->e_flags;
1876 out_flags = elf_elfheader (obfd)->e_flags;
1877
1878 if (! elf_flags_init (obfd))
1879 {
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)
1887 return true;
1888
1889 elf_flags_init (obfd) = true;
1890 elf_elfheader (obfd)->e_flags = in_flags;
1891
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));
1895
1896 return true;
1897 }
1898
1899 /* Check flag compatibility. */
1900 if (in_flags == out_flags)
1901 return true;
1902
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));
1907
1908 return true;
1909 }
1910
1911 /* Display the flags field. */
1912
1913 static boolean
1914 v850_elf_print_private_bfd_data (abfd, ptr)
1915 bfd * abfd;
1916 PTR ptr;
1917 {
1918 FILE * file = (FILE *) ptr;
1919
1920 BFD_ASSERT (abfd != NULL && ptr != NULL);
1921
1922 _bfd_elf_print_private_bfd_data (abfd, ptr);
1923
1924 /* xgettext:c-format */
1925 fprintf (file, _("private flags = %lx: "), elf_elfheader (abfd)->e_flags);
1926
1927 switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH)
1928 {
1929 default:
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;
1933 }
1934
1935 fputc ('\n', file);
1936
1937 return true;
1938 }
1939
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. */
1946
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;
1956
1957 /* Given a BFD section, try to locate the
1958 corresponding ELF section index. */
1959
1960 static boolean
1961 v850_elf_section_from_bfd_section (abfd, hdr, sec, retval)
1962 bfd * abfd ATTRIBUTE_UNUSED;
1963 Elf32_Internal_Shdr * hdr ATTRIBUTE_UNUSED;
1964 asection * sec;
1965 int * retval;
1966 {
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;
1973 else
1974 return false;
1975
1976 return true;
1977 }
1978
1979 /* Handle the special V850 section numbers that a symbol may use. */
1980
1981 static void
1982 v850_elf_symbol_processing (abfd, asym)
1983 bfd * abfd;
1984 asymbol * asym;
1985 {
1986 elf_symbol_type * elfsym = (elf_symbol_type *) asym;
1987 unsigned short index;
1988
1989 index = elfsym->internal_elf_sym.st_shndx;
1990
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.
1994
1995 FIXME: Should we alter the st_shndx field as well ? */
1996
1997 if (index < elf_elfheader(abfd)[0].e_shnum)
1998 switch (elf_elfsections(abfd)[index]->sh_type)
1999 {
2000 case SHT_V850_SCOMMON:
2001 index = SHN_V850_SCOMMON;
2002 break;
2003
2004 case SHT_V850_TCOMMON:
2005 index = SHN_V850_TCOMMON;
2006 break;
2007
2008 case SHT_V850_ZCOMMON:
2009 index = SHN_V850_ZCOMMON;
2010 break;
2011
2012 default:
2013 break;
2014 }
2015
2016 switch (index)
2017 {
2018 case SHN_V850_SCOMMON:
2019 if (v850_elf_scom_section.name == NULL)
2020 {
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;
2031 }
2032 asym->section = & v850_elf_scom_section;
2033 asym->value = elfsym->internal_elf_sym.st_size;
2034 break;
2035
2036 case SHN_V850_TCOMMON:
2037 if (v850_elf_tcom_section.name == NULL)
2038 {
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;
2049 }
2050 asym->section = & v850_elf_tcom_section;
2051 asym->value = elfsym->internal_elf_sym.st_size;
2052 break;
2053
2054 case SHN_V850_ZCOMMON:
2055 if (v850_elf_zcom_section.name == NULL)
2056 {
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;
2067 }
2068 asym->section = & v850_elf_zcom_section;
2069 asym->value = elfsym->internal_elf_sym.st_size;
2070 break;
2071 }
2072 }
2073
2074 /* Hook called by the linker routine which adds symbols from an object
2075 file. We must handle the special v850 section numbers here. */
2076
2077 static boolean
2078 v850_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
2079 bfd * abfd;
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;
2084 asection ** secp;
2085 bfd_vma * valp;
2086 {
2087 int index = sym->st_shndx;
2088
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.
2092
2093 FIXME: Should we alter the st_shndx field as well ? */
2094
2095 if (index < elf_elfheader(abfd)[0].e_shnum)
2096 switch (elf_elfsections(abfd)[index]->sh_type)
2097 {
2098 case SHT_V850_SCOMMON:
2099 index = SHN_V850_SCOMMON;
2100 break;
2101
2102 case SHT_V850_TCOMMON:
2103 index = SHN_V850_TCOMMON;
2104 break;
2105
2106 case SHT_V850_ZCOMMON:
2107 index = SHN_V850_ZCOMMON;
2108 break;
2109
2110 default:
2111 break;
2112 }
2113
2114 switch (index)
2115 {
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;
2120 break;
2121
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;
2126 break;
2127
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;
2132 break;
2133 }
2134
2135 return true;
2136 }
2137
2138 static boolean
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;
2145 {
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. */
2149
2150 if (sym->st_shndx == SHN_COMMON)
2151 {
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;
2158 }
2159
2160 return true;
2161 }
2162
2163 static boolean
2164 v850_elf_section_from_shdr (abfd, hdr, name)
2165 bfd * abfd;
2166 Elf_Internal_Shdr * hdr;
2167 char * name;
2168 {
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. */
2172
2173 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2174 return false;
2175
2176 switch (hdr->sh_type)
2177 {
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,
2183 hdr->bfd_section)
2184 | SEC_IS_COMMON)))
2185 return false;
2186 }
2187
2188 return true;
2189 }
2190
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. */
2193
2194 static boolean
2195 v850_elf_fake_sections (abfd, hdr, sec)
2196 bfd * abfd ATTRIBUTE_UNUSED;
2197 Elf32_Internal_Shdr * hdr;
2198 asection * sec;
2199 {
2200 register const char * name;
2201
2202 name = bfd_get_section_name (abfd, sec);
2203
2204 if (strcmp (name, ".scommon") == 0)
2205 {
2206 hdr->sh_type = SHT_V850_SCOMMON;
2207 }
2208 else if (strcmp (name, ".tcommon") == 0)
2209 {
2210 hdr->sh_type = SHT_V850_TCOMMON;
2211 }
2212 else if (strcmp (name, ".zcommon") == 0)
2213 hdr->sh_type = SHT_V850_ZCOMMON;
2214
2215 return true;
2216 }
2217 \f
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_CYGNUS_V850
2222 #define ELF_MAXPAGESIZE 0x1000
2223
2224 #define elf_info_to_howto v850_elf_info_to_howto_rela
2225 #define elf_info_to_howto_rel v850_elf_info_to_howto_rel
2226
2227 #define elf_backend_check_relocs v850_elf_check_relocs
2228 #define elf_backend_relocate_section v850_elf_relocate_section
2229 #define elf_backend_object_p v850_elf_object_p
2230 #define elf_backend_final_write_processing v850_elf_final_write_processing
2231 #define elf_backend_section_from_bfd_section v850_elf_section_from_bfd_section
2232 #define elf_backend_symbol_processing v850_elf_symbol_processing
2233 #define elf_backend_add_symbol_hook v850_elf_add_symbol_hook
2234 #define elf_backend_link_output_symbol_hook v850_elf_link_output_symbol_hook
2235 #define elf_backend_section_from_shdr v850_elf_section_from_shdr
2236 #define elf_backend_fake_sections v850_elf_fake_sections
2237 #define elf_backend_gc_mark_hook v850_elf_gc_mark_hook
2238 #define elf_backend_gc_sweep_hook v850_elf_gc_sweep_hook
2239
2240 #define elf_backend_can_gc_sections 1
2241
2242 #define bfd_elf32_bfd_is_local_label_name v850_elf_is_local_label_name
2243 #define bfd_elf32_bfd_reloc_type_lookup v850_elf_reloc_type_lookup
2244 #define bfd_elf32_bfd_copy_private_bfd_data v850_elf_copy_private_bfd_data
2245 #define bfd_elf32_bfd_merge_private_bfd_data v850_elf_merge_private_bfd_data
2246 #define bfd_elf32_bfd_set_private_flags v850_elf_set_private_flags
2247 #define bfd_elf32_bfd_print_private_bfd_data v850_elf_print_private_bfd_data
2248
2249 #define elf_symbol_leading_char '_'
2250
2251 #include "elf32-target.h"
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