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[binutils.git] / bfd / elf32-v850.c
blobb964a7e29ecc620abb5a9ff48576673f8a3e651f
1 /* V850-specific support for 32-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
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 for 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) ^ 0x800000) - 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 *, Elf_Internal_Rela *));
39 static void v850_elf_info_to_howto_rela
40 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
41 static bfd_reloc_status_type v850_elf_reloc
42 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
43 static bfd_boolean v850_elf_is_local_label_name
44 PARAMS ((bfd *, const char *));
45 static bfd_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 *, unsigned int, bfd_vma, bfd_byte *));
50 static bfd_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, bfd_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 bfd_boolean v850_elf_object_p
60 PARAMS ((bfd *));
61 static bfd_boolean v850_elf_fake_sections
62 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
63 static void v850_elf_final_write_processing
64 PARAMS ((bfd *, bfd_boolean));
65 static bfd_boolean v850_elf_set_private_flags
66 PARAMS ((bfd *, flagword));
67 static bfd_boolean v850_elf_merge_private_bfd_data
68 PARAMS ((bfd *, bfd *));
69 static bfd_boolean v850_elf_print_private_bfd_data
70 PARAMS ((bfd *, PTR));
71 static bfd_boolean v850_elf_section_from_bfd_section
72 PARAMS ((bfd *, asection *, int *));
73 static void v850_elf_symbol_processing
74 PARAMS ((bfd *, asymbol *));
75 static bfd_boolean v850_elf_add_symbol_hook
76 PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
77 const char **, flagword *, asection **, bfd_vma *));
78 static bfd_boolean v850_elf_link_output_symbol_hook
79 PARAMS ((bfd *, struct bfd_link_info *, const char *,
80 Elf_Internal_Sym *, asection *));
81 static bfd_boolean v850_elf_section_from_shdr
82 PARAMS ((bfd *, Elf_Internal_Shdr *, const char *));
83 static bfd_boolean v850_elf_gc_sweep_hook
84 PARAMS ((bfd *, struct bfd_link_info *, asection *,
85 const Elf_Internal_Rela *));
86 static asection * v850_elf_gc_mark_hook
87 PARAMS ((asection *, struct bfd_link_info *,
88 Elf_Internal_Rela *, struct elf_link_hash_entry *,
89 Elf_Internal_Sym *));
90 static bfd_reloc_status_type v850_elf_ignore_reloc
91 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
92 static bfd_boolean v850_elf_relax_delete_bytes
93 PARAMS ((bfd *, asection *, bfd_vma, bfd_vma, int));
94 static bfd_boolean v850_elf_relax_section
95 PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
96
97 /* Note: It is REQUIRED that the 'type' value of each entry
98 in this array match the index of the entry in the array. */
99 static reloc_howto_type v850_elf_howto_table[] =
100 {
101 /* This reloc does nothing. */
102 HOWTO (R_V850_NONE, /* type */
103 0, /* rightshift */
104 2, /* size (0 = byte, 1 = short, 2 = long) */
105 32, /* bitsize */
106 FALSE, /* pc_relative */
107 0, /* bitpos */
108 complain_overflow_bitfield, /* complain_on_overflow */
109 bfd_elf_generic_reloc, /* special_function */
110 "R_V850_NONE", /* name */
111 FALSE, /* partial_inplace */
112 0, /* src_mask */
113 0, /* dst_mask */
114 FALSE), /* pcrel_offset */
115
116 /* A PC relative 9 bit branch. */
117 HOWTO (R_V850_9_PCREL, /* type */
118 2, /* rightshift */
119 2, /* size (0 = byte, 1 = short, 2 = long) */
120 26, /* bitsize */
121 TRUE, /* pc_relative */
122 0, /* bitpos */
123 complain_overflow_bitfield, /* complain_on_overflow */
124 v850_elf_reloc, /* special_function */
125 "R_V850_9_PCREL", /* name */
126 FALSE, /* partial_inplace */
127 0x00ffffff, /* src_mask */
128 0x00ffffff, /* dst_mask */
129 TRUE), /* pcrel_offset */
130
131 /* A PC relative 22 bit branch. */
132 HOWTO (R_V850_22_PCREL, /* type */
133 2, /* rightshift */
134 2, /* size (0 = byte, 1 = short, 2 = long) */
135 22, /* bitsize */
136 TRUE, /* pc_relative */
137 7, /* bitpos */
138 complain_overflow_signed, /* complain_on_overflow */
139 v850_elf_reloc, /* special_function */
140 "R_V850_22_PCREL", /* name */
141 FALSE, /* partial_inplace */
142 0x07ffff80, /* src_mask */
143 0x07ffff80, /* dst_mask */
144 TRUE), /* pcrel_offset */
145
146 /* High 16 bits of symbol value. */
147 HOWTO (R_V850_HI16_S, /* type */
148 0, /* rightshift */
149 1, /* size (0 = byte, 1 = short, 2 = long) */
150 16, /* bitsize */
151 FALSE, /* pc_relative */
152 0, /* bitpos */
153 complain_overflow_dont, /* complain_on_overflow */
154 v850_elf_reloc, /* special_function */
155 "R_V850_HI16_S", /* name */
156 FALSE, /* partial_inplace */
157 0xffff, /* src_mask */
158 0xffff, /* dst_mask */
159 FALSE), /* pcrel_offset */
160
161 /* High 16 bits of symbol value. */
162 HOWTO (R_V850_HI16, /* type */
163 0, /* rightshift */
164 1, /* size (0 = byte, 1 = short, 2 = long) */
165 16, /* bitsize */
166 FALSE, /* pc_relative */
167 0, /* bitpos */
168 complain_overflow_dont, /* complain_on_overflow */
169 v850_elf_reloc, /* special_function */
170 "R_V850_HI16", /* name */
171 FALSE, /* partial_inplace */
172 0xffff, /* src_mask */
173 0xffff, /* dst_mask */
174 FALSE), /* pcrel_offset */
175
176 /* Low 16 bits of symbol value. */
177 HOWTO (R_V850_LO16, /* type */
178 0, /* rightshift */
179 1, /* size (0 = byte, 1 = short, 2 = long) */
180 16, /* bitsize */
181 FALSE, /* pc_relative */
182 0, /* bitpos */
183 complain_overflow_dont, /* complain_on_overflow */
184 v850_elf_reloc, /* special_function */
185 "R_V850_LO16", /* name */
186 FALSE, /* partial_inplace */
187 0xffff, /* src_mask */
188 0xffff, /* dst_mask */
189 FALSE), /* pcrel_offset */
190
191 /* Simple 32bit reloc. */
192 HOWTO (R_V850_ABS32, /* type */
193 0, /* rightshift */
194 2, /* size (0 = byte, 1 = short, 2 = long) */
195 32, /* bitsize */
196 FALSE, /* pc_relative */
197 0, /* bitpos */
198 complain_overflow_dont, /* complain_on_overflow */
199 v850_elf_reloc, /* special_function */
200 "R_V850_ABS32", /* name */
201 FALSE, /* partial_inplace */
202 0xffffffff, /* src_mask */
203 0xffffffff, /* dst_mask */
204 FALSE), /* pcrel_offset */
205
206 /* Simple 16bit reloc. */
207 HOWTO (R_V850_16, /* type */
208 0, /* rightshift */
209 1, /* size (0 = byte, 1 = short, 2 = long) */
210 16, /* bitsize */
211 FALSE, /* pc_relative */
212 0, /* bitpos */
213 complain_overflow_dont, /* complain_on_overflow */
214 bfd_elf_generic_reloc, /* special_function */
215 "R_V850_16", /* name */
216 FALSE, /* partial_inplace */
217 0xffff, /* src_mask */
218 0xffff, /* dst_mask */
219 FALSE), /* pcrel_offset */
220
221 /* Simple 8bit reloc. */
222 HOWTO (R_V850_8, /* type */
223 0, /* rightshift */
224 0, /* size (0 = byte, 1 = short, 2 = long) */
225 8, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_dont, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_V850_8", /* name */
231 FALSE, /* partial_inplace */
232 0xff, /* src_mask */
233 0xff, /* dst_mask */
234 FALSE), /* pcrel_offset */
235
236 /* 16 bit offset from the short data area pointer. */
237 HOWTO (R_V850_SDA_16_16_OFFSET, /* type */
238 0, /* rightshift */
239 1, /* size (0 = byte, 1 = short, 2 = long) */
240 16, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_dont, /* complain_on_overflow */
244 v850_elf_reloc, /* special_function */
245 "R_V850_SDA_16_16_OFFSET", /* name */
246 FALSE, /* partial_inplace */
247 0xffff, /* src_mask */
248 0xffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* 15 bit offset from the short data area pointer. */
252 HOWTO (R_V850_SDA_15_16_OFFSET, /* type */
253 1, /* rightshift */
254 1, /* size (0 = byte, 1 = short, 2 = long) */
255 16, /* bitsize */
256 FALSE, /* pc_relative */
257 1, /* bitpos */
258 complain_overflow_dont, /* complain_on_overflow */
259 v850_elf_reloc, /* special_function */
260 "R_V850_SDA_15_16_OFFSET", /* name */
261 FALSE, /* partial_inplace */
262 0xfffe, /* src_mask */
263 0xfffe, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 /* 16 bit offset from the zero data area pointer. */
267 HOWTO (R_V850_ZDA_16_16_OFFSET, /* type */
268 0, /* rightshift */
269 1, /* size (0 = byte, 1 = short, 2 = long) */
270 16, /* bitsize */
271 FALSE, /* pc_relative */
272 0, /* bitpos */
273 complain_overflow_dont, /* complain_on_overflow */
274 v850_elf_reloc, /* special_function */
275 "R_V850_ZDA_16_16_OFFSET", /* name */
276 FALSE, /* partial_inplace */
277 0xffff, /* src_mask */
278 0xffff, /* dst_mask */
279 FALSE), /* pcrel_offset */
280
281 /* 15 bit offset from the zero data area pointer. */
282 HOWTO (R_V850_ZDA_15_16_OFFSET, /* type */
283 1, /* rightshift */
284 1, /* size (0 = byte, 1 = short, 2 = long) */
285 16, /* bitsize */
286 FALSE, /* pc_relative */
287 1, /* bitpos */
288 complain_overflow_dont, /* complain_on_overflow */
289 v850_elf_reloc, /* special_function */
290 "R_V850_ZDA_15_16_OFFSET", /* name */
291 FALSE, /* partial_inplace */
292 0xfffe, /* src_mask */
293 0xfffe, /* dst_mask */
294 FALSE), /* pcrel_offset */
295
296 /* 6 bit offset from the tiny data area pointer. */
297 HOWTO (R_V850_TDA_6_8_OFFSET, /* type */
298 2, /* rightshift */
299 1, /* size (0 = byte, 1 = short, 2 = long) */
300 8, /* bitsize */
301 FALSE, /* pc_relative */
302 1, /* bitpos */
303 complain_overflow_dont, /* complain_on_overflow */
304 v850_elf_reloc, /* special_function */
305 "R_V850_TDA_6_8_OFFSET", /* name */
306 FALSE, /* partial_inplace */
307 0x7e, /* src_mask */
308 0x7e, /* dst_mask */
309 FALSE), /* pcrel_offset */
310
311 /* 8 bit offset from the tiny data area pointer. */
312 HOWTO (R_V850_TDA_7_8_OFFSET, /* type */
313 1, /* rightshift */
314 1, /* size (0 = byte, 1 = short, 2 = long) */
315 8, /* bitsize */
316 FALSE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_dont, /* complain_on_overflow */
319 v850_elf_reloc, /* special_function */
320 "R_V850_TDA_7_8_OFFSET", /* name */
321 FALSE, /* partial_inplace */
322 0x7f, /* src_mask */
323 0x7f, /* dst_mask */
324 FALSE), /* pcrel_offset */
325
326 /* 7 bit offset from the tiny data area pointer. */
327 HOWTO (R_V850_TDA_7_7_OFFSET, /* type */
328 0, /* rightshift */
329 1, /* size (0 = byte, 1 = short, 2 = long) */
330 7, /* bitsize */
331 FALSE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_dont, /* complain_on_overflow */
334 v850_elf_reloc, /* special_function */
335 "R_V850_TDA_7_7_OFFSET", /* name */
336 FALSE, /* partial_inplace */
337 0x7f, /* src_mask */
338 0x7f, /* dst_mask */
339 FALSE), /* pcrel_offset */
340
341 /* 16 bit offset from the tiny data area pointer! */
342 HOWTO (R_V850_TDA_16_16_OFFSET, /* type */
343 0, /* rightshift */
344 1, /* size (0 = byte, 1 = short, 2 = long) */
345 16, /* bitsize */
346 FALSE, /* pc_relative */
347 0, /* bitpos */
348 complain_overflow_dont, /* complain_on_overflow */
349 v850_elf_reloc, /* special_function */
350 "R_V850_TDA_16_16_OFFSET", /* name */
351 FALSE, /* partial_inplace */
352 0xffff, /* src_mask */
353 0xfff, /* dst_mask */
354 FALSE), /* pcrel_offset */
355
356 /* 5 bit offset from the tiny data area pointer. */
357 HOWTO (R_V850_TDA_4_5_OFFSET, /* type */
358 1, /* rightshift */
359 1, /* size (0 = byte, 1 = short, 2 = long) */
360 5, /* bitsize */
361 FALSE, /* pc_relative */
362 0, /* bitpos */
363 complain_overflow_dont, /* complain_on_overflow */
364 v850_elf_reloc, /* special_function */
365 "R_V850_TDA_4_5_OFFSET", /* name */
366 FALSE, /* partial_inplace */
367 0x0f, /* src_mask */
368 0x0f, /* dst_mask */
369 FALSE), /* pcrel_offset */
370
371 /* 4 bit offset from the tiny data area pointer. */
372 HOWTO (R_V850_TDA_4_4_OFFSET, /* type */
373 0, /* rightshift */
374 1, /* size (0 = byte, 1 = short, 2 = long) */
375 4, /* bitsize */
376 FALSE, /* pc_relative */
377 0, /* bitpos */
378 complain_overflow_dont, /* complain_on_overflow */
379 v850_elf_reloc, /* special_function */
380 "R_V850_TDA_4_4_OFFSET", /* name */
381 FALSE, /* partial_inplace */
382 0x0f, /* src_mask */
383 0x0f, /* dst_mask */
384 FALSE), /* pcrel_offset */
385
386 /* 16 bit offset from the short data area pointer. */
387 HOWTO (R_V850_SDA_16_16_SPLIT_OFFSET, /* type */
388 0, /* rightshift */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
390 16, /* bitsize */
391 FALSE, /* pc_relative */
392 0, /* bitpos */
393 complain_overflow_dont, /* complain_on_overflow */
394 v850_elf_reloc, /* special_function */
395 "R_V850_SDA_16_16_SPLIT_OFFSET",/* name */
396 FALSE, /* partial_inplace */
397 0xfffe0020, /* src_mask */
398 0xfffe0020, /* dst_mask */
399 FALSE), /* pcrel_offset */
400
401 /* 16 bit offset from the zero data area pointer. */
402 HOWTO (R_V850_ZDA_16_16_SPLIT_OFFSET, /* type */
403 0, /* rightshift */
404 2, /* size (0 = byte, 1 = short, 2 = long) */
405 16, /* bitsize */
406 FALSE, /* pc_relative */
407 0, /* bitpos */
408 complain_overflow_dont, /* complain_on_overflow */
409 v850_elf_reloc, /* special_function */
410 "R_V850_ZDA_16_16_SPLIT_OFFSET",/* name */
411 FALSE, /* partial_inplace */
412 0xfffe0020, /* src_mask */
413 0xfffe0020, /* dst_mask */
414 FALSE), /* pcrel_offset */
415
416 /* 6 bit offset from the call table base pointer. */
417 HOWTO (R_V850_CALLT_6_7_OFFSET, /* type */
418 0, /* rightshift */
419 1, /* size (0 = byte, 1 = short, 2 = long) */
420 7, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_dont, /* complain_on_overflow */
424 v850_elf_reloc, /* special_function */
425 "R_V850_CALLT_6_7_OFFSET", /* name */
426 FALSE, /* partial_inplace */
427 0x3f, /* src_mask */
428 0x3f, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 /* 16 bit offset from the call table base pointer. */
432 HOWTO (R_V850_CALLT_16_16_OFFSET, /* type */
433 0, /* rightshift */
434 1, /* size (0 = byte, 1 = short, 2 = long) */
435 16, /* bitsize */
436 FALSE, /* pc_relative */
437 0, /* bitpos */
438 complain_overflow_dont, /* complain_on_overflow */
439 v850_elf_reloc, /* special_function */
440 "R_V850_CALLT_16_16_OFFSET", /* name */
441 FALSE, /* partial_inplace */
442 0xffff, /* src_mask */
443 0xffff, /* dst_mask */
444 FALSE), /* pcrel_offset */
445
446 /* GNU extension to record C++ vtable hierarchy */
447 HOWTO (R_V850_GNU_VTINHERIT, /* type */
448 0, /* rightshift */
449 2, /* size (0 = byte, 1 = short, 2 = long) */
450 0, /* bitsize */
451 FALSE, /* pc_relative */
452 0, /* bitpos */
453 complain_overflow_dont, /* complain_on_overflow */
454 NULL, /* special_function */
455 "R_V850_GNU_VTINHERIT", /* name */
456 FALSE, /* partial_inplace */
457 0, /* src_mask */
458 0, /* dst_mask */
459 FALSE), /* pcrel_offset */
460
461 /* GNU extension to record C++ vtable member usage */
462 HOWTO (R_V850_GNU_VTENTRY, /* type */
463 0, /* rightshift */
464 2, /* size (0 = byte, 1 = short, 2 = long) */
465 0, /* bitsize */
466 FALSE, /* pc_relative */
467 0, /* bitpos */
468 complain_overflow_dont, /* complain_on_overflow */
469 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
470 "R_V850_GNU_VTENTRY", /* name */
471 FALSE, /* partial_inplace */
472 0, /* src_mask */
473 0, /* dst_mask */
474 FALSE), /* pcrel_offset */
475
476 /* Indicates a .longcall pseudo-op. The compiler will generate a .longcall
477 pseudo-op when it finds a function call which can be relaxed. */
478 HOWTO (R_V850_LONGCALL, /* type */
479 0, /* rightshift */
480 2, /* size (0 = byte, 1 = short, 2 = long) */
481 32, /* bitsize */
482 TRUE, /* pc_relative */
483 0, /* bitpos */
484 complain_overflow_signed, /* complain_on_overflow */
485 v850_elf_ignore_reloc, /* special_function */
486 "R_V850_LONGCALL", /* name */
487 FALSE, /* partial_inplace */
488 0, /* src_mask */
489 0, /* dst_mask */
490 TRUE), /* pcrel_offset */
491
492 /* Indicates a .longjump pseudo-op. The compiler will generate a
493 .longjump pseudo-op when it finds a branch which can be relaxed. */
494 HOWTO (R_V850_LONGJUMP, /* type */
495 0, /* rightshift */
496 2, /* size (0 = byte, 1 = short, 2 = long) */
497 32, /* bitsize */
498 TRUE, /* pc_relative */
499 0, /* bitpos */
500 complain_overflow_signed, /* complain_on_overflow */
501 v850_elf_ignore_reloc, /* special_function */
502 "R_V850_LONGJUMP", /* name */
503 FALSE, /* partial_inplace */
504 0, /* src_mask */
505 0, /* dst_mask */
506 TRUE), /* pcrel_offset */
507
508 HOWTO (R_V850_ALIGN, /* type */
509 0, /* rightshift */
510 1, /* size (0 = byte, 1 = short, 2 = long) */
511 0, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_unsigned, /* complain_on_overflow */
515 v850_elf_ignore_reloc, /* special_function */
516 "R_V850_ALIGN", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0, /* dst_mask */
520 TRUE), /* pcrel_offset */
521
522 /* Simple pc-relative 32bit reloc. */
523 HOWTO (R_V850_REL32, /* type */
524 0, /* rightshift */
525 2, /* size (0 = byte, 1 = short, 2 = long) */
526 32, /* bitsize */
527 TRUE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_dont, /* complain_on_overflow */
530 v850_elf_reloc, /* special_function */
531 "R_V850_REL32", /* name */
532 FALSE, /* partial_inplace */
533 0xffffffff, /* src_mask */
534 0xffffffff, /* dst_mask */
535 FALSE), /* pcrel_offset */
536 };
537
538 /* Map BFD reloc types to V850 ELF reloc types. */
539
540 struct v850_elf_reloc_map
541 {
542 /* BFD_RELOC_V850_CALLT_16_16_OFFSET is 258, which will not fix in an
543 unsigned char. */
544 bfd_reloc_code_real_type bfd_reloc_val;
545 unsigned int elf_reloc_val;
546 };
547
548 static const struct v850_elf_reloc_map v850_elf_reloc_map[] =
549 {
550 { BFD_RELOC_NONE, R_V850_NONE },
551 { BFD_RELOC_V850_9_PCREL, R_V850_9_PCREL },
552 { BFD_RELOC_V850_22_PCREL, R_V850_22_PCREL },
553 { BFD_RELOC_HI16_S, R_V850_HI16_S },
554 { BFD_RELOC_HI16, R_V850_HI16 },
555 { BFD_RELOC_LO16, R_V850_LO16 },
556 { BFD_RELOC_32, R_V850_ABS32 },
557 { BFD_RELOC_32_PCREL, R_V850_REL32 },
558 { BFD_RELOC_16, R_V850_16 },
559 { BFD_RELOC_8, R_V850_8 },
560 { BFD_RELOC_V850_SDA_16_16_OFFSET, R_V850_SDA_16_16_OFFSET },
561 { BFD_RELOC_V850_SDA_15_16_OFFSET, R_V850_SDA_15_16_OFFSET },
562 { BFD_RELOC_V850_ZDA_16_16_OFFSET, R_V850_ZDA_16_16_OFFSET },
563 { BFD_RELOC_V850_ZDA_15_16_OFFSET, R_V850_ZDA_15_16_OFFSET },
564 { BFD_RELOC_V850_TDA_6_8_OFFSET, R_V850_TDA_6_8_OFFSET },
565 { BFD_RELOC_V850_TDA_7_8_OFFSET, R_V850_TDA_7_8_OFFSET },
566 { BFD_RELOC_V850_TDA_7_7_OFFSET, R_V850_TDA_7_7_OFFSET },
567 { BFD_RELOC_V850_TDA_16_16_OFFSET, R_V850_TDA_16_16_OFFSET },
568 { BFD_RELOC_V850_TDA_4_5_OFFSET, R_V850_TDA_4_5_OFFSET },
569 { BFD_RELOC_V850_TDA_4_4_OFFSET, R_V850_TDA_4_4_OFFSET },
570 { BFD_RELOC_V850_SDA_16_16_SPLIT_OFFSET, R_V850_SDA_16_16_SPLIT_OFFSET },
571 { BFD_RELOC_V850_ZDA_16_16_SPLIT_OFFSET, R_V850_ZDA_16_16_SPLIT_OFFSET },
572 { BFD_RELOC_V850_CALLT_6_7_OFFSET, R_V850_CALLT_6_7_OFFSET },
573 { BFD_RELOC_V850_CALLT_16_16_OFFSET, R_V850_CALLT_16_16_OFFSET },
574 { BFD_RELOC_VTABLE_INHERIT, R_V850_GNU_VTINHERIT },
575 { BFD_RELOC_VTABLE_ENTRY, R_V850_GNU_VTENTRY },
576 { BFD_RELOC_V850_LONGCALL, R_V850_LONGCALL },
577 { BFD_RELOC_V850_LONGJUMP, R_V850_LONGJUMP },
578 { BFD_RELOC_V850_ALIGN, R_V850_ALIGN },
579
580 };
581 \f
582 /* Map a bfd relocation into the appropriate howto structure. */
583
584 static reloc_howto_type *
585 v850_elf_reloc_type_lookup (abfd, code)
586 bfd *abfd ATTRIBUTE_UNUSED;
587 bfd_reloc_code_real_type code;
588 {
589 unsigned int i;
590
591 for (i = ARRAY_SIZE (v850_elf_reloc_map); i --;)
592 if (v850_elf_reloc_map[i].bfd_reloc_val == code)
593 {
594 unsigned int elf_reloc_val = v850_elf_reloc_map[i].elf_reloc_val;
595
596 BFD_ASSERT (v850_elf_howto_table[elf_reloc_val].type == elf_reloc_val);
597
598 return v850_elf_howto_table + elf_reloc_val;
599 }
600
601 return NULL;
602 }
603 \f
604 /* Set the howto pointer for an V850 ELF reloc. */
605
606 static void
607 v850_elf_info_to_howto_rel (abfd, cache_ptr, dst)
608 bfd *abfd ATTRIBUTE_UNUSED;
609 arelent *cache_ptr;
610 Elf_Internal_Rela *dst;
611 {
612 unsigned int r_type;
613
614 r_type = ELF32_R_TYPE (dst->r_info);
615 BFD_ASSERT (r_type < (unsigned int) R_V850_max);
616 cache_ptr->howto = &v850_elf_howto_table[r_type];
617 }
618
619 /* Set the howto pointer for a V850 ELF reloc (type RELA). */
620 static void
621 v850_elf_info_to_howto_rela (abfd, cache_ptr, dst)
622 bfd *abfd ATTRIBUTE_UNUSED;
623 arelent * cache_ptr;
624 Elf_Internal_Rela *dst;
625 {
626 unsigned int r_type;
627
628 r_type = ELF32_R_TYPE (dst->r_info);
629 BFD_ASSERT (r_type < (unsigned int) R_V850_max);
630 cache_ptr->howto = &v850_elf_howto_table[r_type];
631 }
632 \f
633 /* Look through the relocs for a section during the first phase, and
634 allocate space in the global offset table or procedure linkage
635 table. */
636
637 static bfd_boolean
638 v850_elf_check_relocs (abfd, info, sec, relocs)
639 bfd *abfd;
640 struct bfd_link_info *info;
641 asection *sec;
642 const Elf_Internal_Rela *relocs;
643 {
644 bfd_boolean ret = TRUE;
645 bfd *dynobj;
646 Elf_Internal_Shdr *symtab_hdr;
647 struct elf_link_hash_entry **sym_hashes;
648 const Elf_Internal_Rela *rel;
649 const Elf_Internal_Rela *rel_end;
650 asection *sreloc;
651 enum v850_reloc_type r_type;
652 int other = 0;
653 const char *common = (const char *)0;
654
655 if (info->relocatable)
656 return TRUE;
657
658 #ifdef DEBUG
659 fprintf (stderr, "v850_elf_check_relocs called for section %s in %s\n",
660 bfd_get_section_name (abfd, sec),
661 bfd_archive_filename (abfd));
662 #endif
663
664 dynobj = elf_hash_table (info)->dynobj;
665 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
666 sym_hashes = elf_sym_hashes (abfd);
667 sreloc = NULL;
668
669 rel_end = relocs + sec->reloc_count;
670 for (rel = relocs; rel < rel_end; rel++)
671 {
672 unsigned long r_symndx;
673 struct elf_link_hash_entry *h;
674
675 r_symndx = ELF32_R_SYM (rel->r_info);
676 if (r_symndx < symtab_hdr->sh_info)
677 h = NULL;
678 else
679 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
680
681 r_type = (enum v850_reloc_type) ELF32_R_TYPE (rel->r_info);
682 switch (r_type)
683 {
684 default:
685 case R_V850_NONE:
686 case R_V850_9_PCREL:
687 case R_V850_22_PCREL:
688 case R_V850_HI16_S:
689 case R_V850_HI16:
690 case R_V850_LO16:
691 case R_V850_ABS32:
692 case R_V850_REL32:
693 case R_V850_16:
694 case R_V850_8:
695 case R_V850_CALLT_6_7_OFFSET:
696 case R_V850_CALLT_16_16_OFFSET:
697 break;
698
699 /* This relocation describes the C++ object vtable hierarchy.
700 Reconstruct it for later use during GC. */
701 case R_V850_GNU_VTINHERIT:
702 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
703 return FALSE;
704 break;
705
706 /* This relocation describes which C++ vtable entries
707 are actually used. Record for later use during GC. */
708 case R_V850_GNU_VTENTRY:
709 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
710 return FALSE;
711 break;
712
713 case R_V850_SDA_16_16_SPLIT_OFFSET:
714 case R_V850_SDA_16_16_OFFSET:
715 case R_V850_SDA_15_16_OFFSET:
716 other = V850_OTHER_SDA;
717 common = ".scommon";
718 goto small_data_common;
719
720 case R_V850_ZDA_16_16_SPLIT_OFFSET:
721 case R_V850_ZDA_16_16_OFFSET:
722 case R_V850_ZDA_15_16_OFFSET:
723 other = V850_OTHER_ZDA;
724 common = ".zcommon";
725 goto small_data_common;
726
727 case R_V850_TDA_4_5_OFFSET:
728 case R_V850_TDA_4_4_OFFSET:
729 case R_V850_TDA_6_8_OFFSET:
730 case R_V850_TDA_7_8_OFFSET:
731 case R_V850_TDA_7_7_OFFSET:
732 case R_V850_TDA_16_16_OFFSET:
733 other = V850_OTHER_TDA;
734 common = ".tcommon";
735 /* fall through */
736
737 #define V850_OTHER_MASK (V850_OTHER_TDA | V850_OTHER_SDA | V850_OTHER_ZDA)
738
739 small_data_common:
740 if (h)
741 {
742 /* Flag which type of relocation was used. */
743 h->other |= other;
744 if ((h->other & V850_OTHER_MASK) != (other & V850_OTHER_MASK)
745 && (h->other & V850_OTHER_ERROR) == 0)
746 {
747 const char * msg;
748 static char buff[200]; /* XXX */
749
750 switch (h->other & V850_OTHER_MASK)
751 {
752 default:
753 msg = _("Variable `%s' cannot occupy in multiple small data regions");
754 break;
755 case V850_OTHER_SDA | V850_OTHER_ZDA | V850_OTHER_TDA:
756 msg = _("Variable `%s' can only be in one of the small, zero, and tiny data regions");
757 break;
758 case V850_OTHER_SDA | V850_OTHER_ZDA:
759 msg = _("Variable `%s' cannot be in both small and zero data regions simultaneously");
760 break;
761 case V850_OTHER_SDA | V850_OTHER_TDA:
762 msg = _("Variable `%s' cannot be in both small and tiny data regions simultaneously");
763 break;
764 case V850_OTHER_ZDA | V850_OTHER_TDA:
765 msg = _("Variable `%s' cannot be in both zero and tiny data regions simultaneously");
766 break;
767 }
768
769 sprintf (buff, msg, h->root.root.string);
770 info->callbacks->warning (info, buff, h->root.root.string,
771 abfd, h->root.u.def.section,
772 (bfd_vma) 0);
773
774 bfd_set_error (bfd_error_bad_value);
775 h->other |= V850_OTHER_ERROR;
776 ret = FALSE;
777 }
778 }
779
780 if (h && h->root.type == bfd_link_hash_common
781 && h->root.u.c.p
782 && !strcmp (bfd_get_section_name (abfd, h->root.u.c.p->section), "COMMON"))
783 {
784 asection * section;
785
786 section = h->root.u.c.p->section = bfd_make_section_old_way (abfd, common);
787 section->flags |= SEC_IS_COMMON;
788 }
789
790 #ifdef DEBUG
791 fprintf (stderr, "v850_elf_check_relocs, found %s relocation for %s%s\n",
792 v850_elf_howto_table[ (int)r_type ].name,
793 (h && h->root.root.string) ? h->root.root.string : "<unknown>",
794 (h->root.type == bfd_link_hash_common) ? ", symbol is common" : "");
795 #endif
796 break;
797 }
798 }
799
800 return ret;
801 }
802
803 /* In the old version, when an entry was checked out from the table,
804 it was deleted. This produced an error if the entry was needed
805 more than once, as the second attempted retry failed.
806
807 In the current version, the entry is not deleted, instead we set
808 the field 'found' to TRUE. If a second lookup matches the same
809 entry, then we know that the hi16s reloc has already been updated
810 and does not need to be updated a second time.
811
812 TODO - TOFIX: If it is possible that we need to restore 2 different
813 addresses from the same table entry, where the first generates an
814 overflow, whilst the second do not, then this code will fail. */
815
816 typedef struct hi16s_location
817 {
818 bfd_vma addend;
819 bfd_byte *address;
820 unsigned long counter;
821 bfd_boolean found;
822 struct hi16s_location *next;
823 }
824 hi16s_location;
825
826 static hi16s_location *previous_hi16s;
827 static hi16s_location *free_hi16s;
828 static unsigned long hi16s_counter;
829
830 static void
831 remember_hi16s_reloc (abfd, addend, address)
832 bfd *abfd;
833 bfd_vma addend;
834 bfd_byte *address;
835 {
836 hi16s_location * entry = NULL;
837 bfd_size_type amt = sizeof (* free_hi16s);
838
839 /* Find a free structure. */
840 if (free_hi16s == NULL)
841 free_hi16s = (hi16s_location *) bfd_zalloc (abfd, amt);
842
843 entry = free_hi16s;
844 free_hi16s = free_hi16s->next;
845
846 entry->addend = addend;
847 entry->address = address;
848 entry->counter = hi16s_counter ++;
849 entry->found = FALSE;
850 entry->next = previous_hi16s;
851 previous_hi16s = entry;
852
853 /* Cope with wrap around of our counter. */
854 if (hi16s_counter == 0)
855 {
856 /* XXX - Assume that all counter entries differ only in their low 16 bits. */
857 for (entry = previous_hi16s; entry != NULL; entry = entry->next)
858 entry->counter &= 0xffff;
859
860 hi16s_counter = 0x10000;
861 }
862
863 return;
864 }
865
866 static bfd_byte *
867 find_remembered_hi16s_reloc (addend, already_found)
868 bfd_vma addend;
869 bfd_boolean *already_found;
870 {
871 hi16s_location *match = NULL;
872 hi16s_location *entry;
873 hi16s_location *previous = NULL;
874 hi16s_location *prev;
875 bfd_byte *addr;
876
877 /* Search the table. Record the most recent entry that matches. */
878 for (entry = previous_hi16s; entry; entry = entry->next)
879 {
880 if (entry->addend == addend
881 && (match == NULL || match->counter < entry->counter))
882 {
883 previous = prev;
884 match = entry;
885 }
886
887 prev = entry;
888 }
889
890 if (match == NULL)
891 return NULL;
892
893 /* Extract the address. */
894 addr = match->address;
895
896 /* Remember if this entry has already been used before. */
897 if (already_found)
898 * already_found = match->found;
899
900 /* Note that this entry has now been used. */
901 match->found = TRUE;
902
903 return addr;
904 }
905
906 /* FIXME: The code here probably ought to be removed and the code in reloc.c
907 allowed to do its stuff instead. At least for most of the relocs, anyway. */
908
909 static bfd_reloc_status_type
910 v850_elf_perform_relocation (abfd, r_type, addend, address)
911 bfd *abfd;
912 unsigned int r_type;
913 bfd_vma addend;
914 bfd_byte *address;
915 {
916 unsigned long insn;
917 bfd_signed_vma saddend = (bfd_signed_vma) addend;
918
919 switch (r_type)
920 {
921 default:
922 /* fprintf (stderr, "reloc type %d not SUPPORTED\n", r_type ); */
923 return bfd_reloc_notsupported;
924
925 case R_V850_REL32:
926 case R_V850_ABS32:
927 bfd_put_32 (abfd, addend, address);
928 return bfd_reloc_ok;
929
930 case R_V850_22_PCREL:
931 if (saddend > 0x1fffff || saddend < -0x200000)
932 return bfd_reloc_overflow;
933
934 if ((addend % 2) != 0)
935 return bfd_reloc_dangerous;
936
937 insn = bfd_get_32 (abfd, address);
938 insn &= ~0xfffe003f;
939 insn |= (((addend & 0xfffe) << 16) | ((addend & 0x3f0000) >> 16));
940 bfd_put_32 (abfd, (bfd_vma) insn, address);
941 return bfd_reloc_ok;
942
943 case R_V850_9_PCREL:
944 if (saddend > 0xff || saddend < -0x100)
945 return bfd_reloc_overflow;
946
947 if ((addend % 2) != 0)
948 return bfd_reloc_dangerous;
949
950 insn = bfd_get_16 (abfd, address);
951 insn &= ~ 0xf870;
952 insn |= ((addend & 0x1f0) << 7) | ((addend & 0x0e) << 3);
953 break;
954
955 case R_V850_HI16:
956 addend += (bfd_get_16 (abfd, address) << 16);
957 addend = (addend >> 16);
958 insn = addend;
959 break;
960
961 case R_V850_HI16_S:
962 /* Remember where this relocation took place. */
963 remember_hi16s_reloc (abfd, addend, address);
964
965 addend += (bfd_get_16 (abfd, address) << 16);
966 addend = (addend >> 16) + ((addend & 0x8000) != 0);
967
968 /* This relocation cannot overflow. */
969 if (addend > 0x7fff)
970 addend = 0;
971
972 insn = addend;
973 break;
974
975 case R_V850_LO16:
976 /* Calculate the sum of the value stored in the instruction and the
977 addend and check for overflow from the low 16 bits into the high
978 16 bits. The assembler has already done some of this: If the
979 value stored in the instruction has its 15th bit set, (counting
980 from zero) then the assembler will have added 1 to the value
981 stored in the associated HI16S reloc. So for example, these
982 relocations:
983
984 movhi hi( fred ), r0, r1
985 movea lo( fred ), r1, r1
986
987 will store 0 in the value fields for the MOVHI and MOVEA instructions
988 and addend will be the address of fred, but for these instructions:
989
990 movhi hi( fred + 0x123456), r0, r1
991 movea lo( fred + 0x123456), r1, r1
992
993 the value stored in the MOVHI instruction will be 0x12 and the value
994 stored in the MOVEA instruction will be 0x3456. If however the
995 instructions were:
996
997 movhi hi( fred + 0x10ffff), r0, r1
998 movea lo( fred + 0x10ffff), r1, r1
999
1000 then the value stored in the MOVHI instruction would be 0x11 (not
1001 0x10) and the value stored in the MOVEA instruction would be 0xffff.
1002 Thus (assuming for the moment that the addend is 0), at run time the
1003 MOVHI instruction loads 0x110000 into r1, then the MOVEA instruction
1004 adds 0xffffffff (sign extension!) producing 0x10ffff. Similarly if
1005 the instructions were:
1006
1007 movhi hi( fred - 1), r0, r1
1008 movea lo( fred - 1), r1, r1
1009
1010 then 0 is stored in the MOVHI instruction and -1 is stored in the
1011 MOVEA instruction.
1012
1013 Overflow can occur if the addition of the value stored in the
1014 instruction plus the addend sets the 15th bit when before it was clear.
1015 This is because the 15th bit will be sign extended into the high part,
1016 thus reducing its value by one, but since the 15th bit was originally
1017 clear, the assembler will not have added 1 to the previous HI16S reloc
1018 to compensate for this effect. For example:
1019
1020 movhi hi( fred + 0x123456), r0, r1
1021 movea lo( fred + 0x123456), r1, r1
1022
1023 The value stored in HI16S reloc is 0x12, the value stored in the LO16
1024 reloc is 0x3456. If we assume that the address of fred is 0x00007000
1025 then the relocations become:
1026
1027 HI16S: 0x0012 + (0x00007000 >> 16) = 0x12
1028 LO16: 0x3456 + (0x00007000 & 0xffff) = 0xa456
1029
1030 but when the instructions are executed, the MOVEA instruction's value
1031 is signed extended, so the sum becomes:
1032
1033 0x00120000
1034 + 0xffffa456
1035 ------------
1036 0x0011a456 but 'fred + 0x123456' = 0x0012a456
1037
1038 Note that if the 15th bit was set in the value stored in the LO16
1039 reloc, then we do not have to do anything:
1040
1041 movhi hi( fred + 0x10ffff), r0, r1
1042 movea lo( fred + 0x10ffff), r1, r1
1043
1044 HI16S: 0x0011 + (0x00007000 >> 16) = 0x11
1045 LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff
1046
1047 0x00110000
1048 + 0x00006fff
1049 ------------
1050 0x00116fff = fred + 0x10ffff = 0x7000 + 0x10ffff
1051
1052 Overflow can also occur if the computation carries into the 16th bit
1053 and it also results in the 15th bit having the same value as the 15th
1054 bit of the original value. What happens is that the HI16S reloc
1055 will have already examined the 15th bit of the original value and
1056 added 1 to the high part if the bit is set. This compensates for the
1057 sign extension of 15th bit of the result of the computation. But now
1058 there is a carry into the 16th bit, and this has not been allowed for.
1059
1060 So, for example if fred is at address 0xf000:
1061
1062 movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set]
1063 movea lo( fred + 0xffff), r1, r1
1064
1065 HI16S: 0x0001 + (0x0000f000 >> 16) = 0x0001
1066 LO16: 0xffff + (0x0000f000 & 0xffff) = 0xefff (carry into bit 16 is lost)
1067
1068 0x00010000
1069 + 0xffffefff
1070 ------------
1071 0x0000efff but 'fred + 0xffff' = 0x0001efff
1072
1073 Similarly, if the 15th bit remains clear, but overflow occurs into
1074 the 16th bit then (assuming the address of fred is 0xf000):
1075
1076 movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear]
1077 movea lo( fred + 0x7000), r1, r1
1078
1079 HI16S: 0x0000 + (0x0000f000 >> 16) = 0x0000
1080 LO16: 0x7000 + (0x0000f000 & 0xffff) = 0x6fff (carry into bit 16 is lost)
1081
1082 0x00000000
1083 + 0x00006fff
1084 ------------
1085 0x00006fff but 'fred + 0x7000' = 0x00016fff
1086
1087 Note - there is no need to change anything if a carry occurs, and the
1088 15th bit changes its value from being set to being clear, as the HI16S
1089 reloc will have already added in 1 to the high part for us:
1090
1091 movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set]
1092 movea lo( fred + 0xffff), r1, r1
1093
1094 HI16S: 0x0001 + (0x00007000 >> 16)
1095 LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff (carry into bit 16 is lost)
1096
1097 0x00010000
1098 + 0x00006fff (bit 15 not set, so the top half is zero)
1099 ------------
1100 0x00016fff which is right (assuming that fred is at 0x7000)
1101
1102 but if the 15th bit goes from being clear to being set, then we must
1103 once again handle overflow:
1104
1105 movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear]
1106 movea lo( fred + 0x7000), r1, r1
1107
1108 HI16S: 0x0000 + (0x0000ffff >> 16)
1109 LO16: 0x7000 + (0x0000ffff & 0xffff) = 0x6fff (carry into bit 16)
1110
1111 0x00000000
1112 + 0x00006fff (bit 15 not set, so the top half is zero)
1113 ------------
1114 0x00006fff which is wrong (assuming that fred is at 0xffff). */
1115 {
1116 long result;
1117
1118 insn = bfd_get_16 (abfd, address);
1119 result = insn + addend;
1120
1121 #define BIT15_SET(x) ((x) & 0x8000)
1122 #define OVERFLOWS(a,i) ((((a) & 0xffff) + (i)) > 0xffff)
1123
1124 if ((BIT15_SET (result) && ! BIT15_SET (addend))
1125 || (OVERFLOWS (addend, insn)
1126 && ((! BIT15_SET (insn)) || (BIT15_SET (addend)))))
1127 {
1128 bfd_boolean already_updated;
1129 bfd_byte *hi16s_address = find_remembered_hi16s_reloc
1130 (addend, & already_updated);
1131
1132 /* Amend the matching HI16_S relocation. */
1133 if (hi16s_address != NULL)
1134 {
1135 if (! already_updated)
1136 {
1137 insn = bfd_get_16 (abfd, hi16s_address);
1138 insn += 1;
1139 bfd_put_16 (abfd, (bfd_vma) insn, hi16s_address);
1140 }
1141 }
1142 else
1143 {
1144 fprintf (stderr, _("FAILED to find previous HI16 reloc\n"));
1145 return bfd_reloc_overflow;
1146 }
1147 }
1148
1149 /* Do not complain if value has top bit set, as this has been anticipated. */
1150 insn = result & 0xffff;
1151 break;
1152 }
1153
1154 case R_V850_8:
1155 addend += (char) bfd_get_8 (abfd, address);
1156
1157 saddend = (bfd_signed_vma) addend;
1158
1159 if (saddend > 0x7f || saddend < -0x80)
1160 return bfd_reloc_overflow;
1161
1162 bfd_put_8 (abfd, addend, address);
1163 return bfd_reloc_ok;
1164
1165 case R_V850_CALLT_16_16_OFFSET:
1166 addend += bfd_get_16 (abfd, address);
1167
1168 saddend = (bfd_signed_vma) addend;
1169
1170 if (saddend > 0xffff || saddend < 0)
1171 return bfd_reloc_overflow;
1172
1173 insn = addend;
1174 break;
1175
1176 case R_V850_16:
1177
1178 /* drop through */
1179 case R_V850_SDA_16_16_OFFSET:
1180 case R_V850_ZDA_16_16_OFFSET:
1181 case R_V850_TDA_16_16_OFFSET:
1182 addend += bfd_get_16 (abfd, address);
1183
1184 saddend = (bfd_signed_vma) addend;
1185
1186 if (saddend > 0x7fff || saddend < -0x8000)
1187 return bfd_reloc_overflow;
1188
1189 insn = addend;
1190 break;
1191
1192 case R_V850_SDA_15_16_OFFSET:
1193 case R_V850_ZDA_15_16_OFFSET:
1194 insn = bfd_get_16 (abfd, address);
1195 addend += (insn & 0xfffe);
1196
1197 saddend = (bfd_signed_vma) addend;
1198
1199 if (saddend > 0x7ffe || saddend < -0x8000)
1200 return bfd_reloc_overflow;
1201
1202 if (addend & 1)
1203 return bfd_reloc_dangerous;
1204
1205 insn = (addend &~ (bfd_vma) 1) | (insn & 1);
1206 break;
1207
1208 case R_V850_TDA_6_8_OFFSET:
1209 insn = bfd_get_16 (abfd, address);
1210 addend += ((insn & 0x7e) << 1);
1211
1212 saddend = (bfd_signed_vma) addend;
1213
1214 if (saddend > 0xfc || saddend < 0)
1215 return bfd_reloc_overflow;
1216
1217 if (addend & 3)
1218 return bfd_reloc_dangerous;
1219
1220 insn &= 0xff81;
1221 insn |= (addend >> 1);
1222 break;
1223
1224 case R_V850_TDA_7_8_OFFSET:
1225 insn = bfd_get_16 (abfd, address);
1226 addend += ((insn & 0x7f) << 1);
1227
1228 saddend = (bfd_signed_vma) addend;
1229
1230 if (saddend > 0xfe || saddend < 0)
1231 return bfd_reloc_overflow;
1232
1233 if (addend & 1)
1234 return bfd_reloc_dangerous;
1235
1236 insn &= 0xff80;
1237 insn |= (addend >> 1);
1238 break;
1239
1240 case R_V850_TDA_7_7_OFFSET:
1241 insn = bfd_get_16 (abfd, address);
1242 addend += insn & 0x7f;
1243
1244 saddend = (bfd_signed_vma) addend;
1245
1246 if (saddend > 0x7f || saddend < 0)
1247 return bfd_reloc_overflow;
1248
1249 insn &= 0xff80;
1250 insn |= addend;
1251 break;
1252
1253 case R_V850_TDA_4_5_OFFSET:
1254 insn = bfd_get_16 (abfd, address);
1255 addend += ((insn & 0xf) << 1);
1256
1257 saddend = (bfd_signed_vma) addend;
1258
1259 if (saddend > 0x1e || saddend < 0)
1260 return bfd_reloc_overflow;
1261
1262 if (addend & 1)
1263 return bfd_reloc_dangerous;
1264
1265 insn &= 0xfff0;
1266 insn |= (addend >> 1);
1267 break;
1268
1269 case R_V850_TDA_4_4_OFFSET:
1270 insn = bfd_get_16 (abfd, address);
1271 addend += insn & 0xf;
1272
1273 saddend = (bfd_signed_vma) addend;
1274
1275 if (saddend > 0xf || saddend < 0)
1276 return bfd_reloc_overflow;
1277
1278 insn &= 0xfff0;
1279 insn |= addend;
1280 break;
1281
1282 case R_V850_ZDA_16_16_SPLIT_OFFSET:
1283 case R_V850_SDA_16_16_SPLIT_OFFSET:
1284 insn = bfd_get_32 (abfd, address);
1285 addend += ((insn & 0xfffe0000) >> 16) + ((insn & 0x20) >> 5);
1286
1287 saddend = (bfd_signed_vma) addend;
1288
1289 if (saddend > 0x7fff || saddend < -0x8000)
1290 return bfd_reloc_overflow;
1291
1292 insn &= 0x0001ffdf;
1293 insn |= (addend & 1) << 5;
1294 insn |= (addend &~ (bfd_vma) 1) << 16;
1295
1296 bfd_put_32 (abfd, (bfd_vma) insn, address);
1297 return bfd_reloc_ok;
1298
1299 case R_V850_CALLT_6_7_OFFSET:
1300 insn = bfd_get_16 (abfd, address);
1301 addend += ((insn & 0x3f) << 1);
1302
1303 saddend = (bfd_signed_vma) addend;
1304
1305 if (saddend > 0x7e || saddend < 0)
1306 return bfd_reloc_overflow;
1307
1308 if (addend & 1)
1309 return bfd_reloc_dangerous;
1310
1311 insn &= 0xff80;
1312 insn |= (addend >> 1);
1313 break;
1314
1315 case R_V850_GNU_VTINHERIT:
1316 case R_V850_GNU_VTENTRY:
1317 return bfd_reloc_ok;
1318
1319 }
1320
1321 bfd_put_16 (abfd, (bfd_vma) insn, address);
1322 return bfd_reloc_ok;
1323 }
1324 \f
1325 /* Insert the addend into the instruction. */
1326
1327 static bfd_reloc_status_type
1328 v850_elf_reloc (abfd, reloc, symbol, data, isection, obfd, err)
1329 bfd *abfd ATTRIBUTE_UNUSED;
1330 arelent *reloc;
1331 asymbol *symbol;
1332 PTR data ATTRIBUTE_UNUSED;
1333 asection *isection;
1334 bfd *obfd;
1335 char **err ATTRIBUTE_UNUSED;
1336 {
1337 long relocation;
1338
1339 /* If there is an output BFD,
1340 and the symbol is not a section name (which is only defined at final link time),
1341 and either we are not putting the addend into the instruction
1342 or the addend is zero, so there is nothing to add into the instruction
1343 then just fixup the address and return. */
1344 if (obfd != (bfd *) NULL
1345 && (symbol->flags & BSF_SECTION_SYM) == 0
1346 && (! reloc->howto->partial_inplace
1347 || reloc->addend == 0))
1348 {
1349 reloc->address += isection->output_offset;
1350 return bfd_reloc_ok;
1351 }
1352
1353 /* Catch relocs involving undefined symbols. */
1354 if (bfd_is_und_section (symbol->section)
1355 && (symbol->flags & BSF_WEAK) == 0
1356 && obfd == NULL)
1357 return bfd_reloc_undefined;
1358
1359 /* We handle final linking of some relocs ourselves. */
1360
1361 /* Is the address of the relocation really within the section? */
1362 if (reloc->address > isection->_cooked_size)
1363 return bfd_reloc_outofrange;
1364
1365 /* Work out which section the relocation is targeted at and the
1366 initial relocation command value. */
1367
1368 if (reloc->howto->pc_relative)
1369 return bfd_reloc_ok;
1370
1371 /* Get symbol value. (Common symbols are special.) */
1372 if (bfd_is_com_section (symbol->section))
1373 relocation = 0;
1374 else
1375 relocation = symbol->value;
1376
1377 /* Convert input-section-relative symbol value to absolute + addend. */
1378 relocation += symbol->section->output_section->vma;
1379 relocation += symbol->section->output_offset;
1380 relocation += reloc->addend;
1381
1382 #if 0 /* Since this reloc is going to be processed later on, we should
1383 not make it pc-relative here. To test this, try assembling and
1384 linking this program:
1385
1386 .text
1387 .globl _start
1388 nop
1389 _start:
1390 jr foo
1391
1392 .section ".foo","ax"
1393 nop
1394 foo:
1395 nop */
1396 if (reloc->howto->pc_relative)
1397 {
1398 /* Here the variable relocation holds the final address of the
1399 symbol we are relocating against, plus any addend. */
1400 relocation -= isection->output_section->vma + isection->output_offset;
1401
1402 /* Deal with pcrel_offset. */
1403 relocation -= reloc->address;
1404 }
1405 #endif
1406 reloc->addend = relocation;
1407 return bfd_reloc_ok;
1408 }
1409
1410 /* This function is used for relocs which are only used
1411 for relaxing, which the linker should otherwise ignore. */
1412
1413 static bfd_reloc_status_type
1414 v850_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section,
1415 output_bfd, error_message)
1416 bfd *abfd ATTRIBUTE_UNUSED;
1417 arelent *reloc_entry;
1418 asymbol *symbol ATTRIBUTE_UNUSED;
1419 PTR data ATTRIBUTE_UNUSED;
1420 asection *input_section;
1421 bfd *output_bfd;
1422 char **error_message ATTRIBUTE_UNUSED;
1423 {
1424 if (output_bfd != NULL)
1425 reloc_entry->address += input_section->output_offset;
1426
1427 return bfd_reloc_ok;
1428 }
1429 \f
1430 static bfd_boolean
1431 v850_elf_is_local_label_name (abfd, name)
1432 bfd *abfd ATTRIBUTE_UNUSED;
1433 const char *name;
1434 {
1435 return ( (name[0] == '.' && (name[1] == 'L' || name[1] == '.'))
1436 || (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_'));
1437 }
1438 \f
1439 /* We overload some of the bfd_reloc error codes for own purposes. */
1440 #define bfd_reloc_gp_not_found bfd_reloc_other
1441 #define bfd_reloc_ep_not_found bfd_reloc_continue
1442 #define bfd_reloc_ctbp_not_found (bfd_reloc_dangerous + 1)
1443
1444 /* Perform a relocation as part of a final link. */
1445
1446 static bfd_reloc_status_type
1447 v850_elf_final_link_relocate (howto, input_bfd, output_bfd,
1448 input_section, contents, offset, value,
1449 addend, info, sym_sec, is_local)
1450 reloc_howto_type *howto;
1451 bfd *input_bfd;
1452 bfd *output_bfd ATTRIBUTE_UNUSED;
1453 asection *input_section;
1454 bfd_byte *contents;
1455 bfd_vma offset;
1456 bfd_vma value;
1457 bfd_vma addend;
1458 struct bfd_link_info *info;
1459 asection *sym_sec;
1460 int is_local ATTRIBUTE_UNUSED;
1461 {
1462 unsigned int r_type = howto->type;
1463 bfd_byte *hit_data = contents + offset;
1464
1465 /* Adjust the value according to the relocation. */
1466 switch (r_type)
1467 {
1468 case R_V850_9_PCREL:
1469 value -= (input_section->output_section->vma
1470 + input_section->output_offset);
1471 value -= offset;
1472 break;
1473
1474 case R_V850_22_PCREL:
1475 value -= (input_section->output_section->vma
1476 + input_section->output_offset
1477 + offset);
1478
1479 /* If the sign extension will corrupt the value then we have overflowed. */
1480 if (((value & 0xff000000) != 0x0) && ((value & 0xff000000) != 0xff000000))
1481 return bfd_reloc_overflow;
1482
1483 /* Only the bottom 24 bits of the PC are valid */
1484 value = SEXT24 (value);
1485 break;
1486
1487 case R_V850_REL32:
1488 value -= (input_section->output_section->vma
1489 + input_section->output_offset
1490 + offset);
1491 break;
1492
1493 case R_V850_HI16_S:
1494 case R_V850_HI16:
1495 case R_V850_LO16:
1496 case R_V850_16:
1497 case R_V850_ABS32:
1498 case R_V850_8:
1499 break;
1500
1501 case R_V850_ZDA_15_16_OFFSET:
1502 case R_V850_ZDA_16_16_OFFSET:
1503 case R_V850_ZDA_16_16_SPLIT_OFFSET:
1504 if (sym_sec == NULL)
1505 return bfd_reloc_undefined;
1506
1507 value -= sym_sec->output_section->vma;
1508 break;
1509
1510 case R_V850_SDA_15_16_OFFSET:
1511 case R_V850_SDA_16_16_OFFSET:
1512 case R_V850_SDA_16_16_SPLIT_OFFSET:
1513 {
1514 unsigned long gp;
1515 struct bfd_link_hash_entry * h;
1516
1517 if (sym_sec == NULL)
1518 return bfd_reloc_undefined;
1519
1520 /* Get the value of __gp. */
1521 h = bfd_link_hash_lookup (info->hash, "__gp", FALSE, FALSE, TRUE);
1522 if (h == (struct bfd_link_hash_entry *) NULL
1523 || h->type != bfd_link_hash_defined)
1524 return bfd_reloc_gp_not_found;
1525
1526 gp = (h->u.def.value
1527 + h->u.def.section->output_section->vma
1528 + h->u.def.section->output_offset);
1529
1530 value -= sym_sec->output_section->vma;
1531 value -= (gp - sym_sec->output_section->vma);
1532 }
1533 break;
1534
1535 case R_V850_TDA_4_4_OFFSET:
1536 case R_V850_TDA_4_5_OFFSET:
1537 case R_V850_TDA_16_16_OFFSET:
1538 case R_V850_TDA_7_7_OFFSET:
1539 case R_V850_TDA_7_8_OFFSET:
1540 case R_V850_TDA_6_8_OFFSET:
1541 {
1542 unsigned long ep;
1543 struct bfd_link_hash_entry * h;
1544
1545 /* Get the value of __ep. */
1546 h = bfd_link_hash_lookup (info->hash, "__ep", FALSE, FALSE, TRUE);
1547 if (h == (struct bfd_link_hash_entry *) NULL
1548 || h->type != bfd_link_hash_defined)
1549 return bfd_reloc_ep_not_found;
1550
1551 ep = (h->u.def.value
1552 + h->u.def.section->output_section->vma
1553 + h->u.def.section->output_offset);
1554
1555 value -= ep;
1556 }
1557 break;
1558
1559 case R_V850_CALLT_6_7_OFFSET:
1560 {
1561 unsigned long ctbp;
1562 struct bfd_link_hash_entry * h;
1563
1564 /* Get the value of __ctbp. */
1565 h = bfd_link_hash_lookup (info->hash, "__ctbp", FALSE, FALSE, TRUE);
1566 if (h == (struct bfd_link_hash_entry *) NULL
1567 || h->type != bfd_link_hash_defined)
1568 return bfd_reloc_ctbp_not_found;
1569
1570 ctbp = (h->u.def.value
1571 + h->u.def.section->output_section->vma
1572 + h->u.def.section->output_offset);
1573 value -= ctbp;
1574 }
1575 break;
1576
1577 case R_V850_CALLT_16_16_OFFSET:
1578 {
1579 unsigned long ctbp;
1580 struct bfd_link_hash_entry * h;
1581
1582 if (sym_sec == NULL)
1583 return bfd_reloc_undefined;
1584
1585 /* Get the value of __ctbp. */
1586 h = bfd_link_hash_lookup (info->hash, "__ctbp", FALSE, FALSE, TRUE);
1587 if (h == (struct bfd_link_hash_entry *) NULL
1588 || h->type != bfd_link_hash_defined)
1589 return bfd_reloc_ctbp_not_found;
1590
1591 ctbp = (h->u.def.value
1592 + h->u.def.section->output_section->vma
1593 + h->u.def.section->output_offset);
1594
1595 value -= sym_sec->output_section->vma;
1596 value -= (ctbp - sym_sec->output_section->vma);
1597 }
1598 break;
1599
1600 case R_V850_NONE:
1601 case R_V850_GNU_VTINHERIT:
1602 case R_V850_GNU_VTENTRY:
1603 case R_V850_LONGCALL:
1604 case R_V850_LONGJUMP:
1605 case R_V850_ALIGN:
1606 return bfd_reloc_ok;
1607
1608 default:
1609 return bfd_reloc_notsupported;
1610 }
1611
1612 /* Perform the relocation. */
1613 return v850_elf_perform_relocation (input_bfd, r_type, value + addend, hit_data);
1614 }
1615 \f
1616 /* Relocate an V850 ELF section. */
1617
1618 static bfd_boolean
1619 v850_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1620 contents, relocs, local_syms, local_sections)
1621 bfd *output_bfd;
1622 struct bfd_link_info *info;
1623 bfd *input_bfd;
1624 asection *input_section;
1625 bfd_byte *contents;
1626 Elf_Internal_Rela *relocs;
1627 Elf_Internal_Sym *local_syms;
1628 asection **local_sections;
1629 {
1630 Elf_Internal_Shdr *symtab_hdr;
1631 struct elf_link_hash_entry **sym_hashes;
1632 Elf_Internal_Rela *rel;
1633 Elf_Internal_Rela *relend;
1634
1635 if (info->relocatable)
1636 return TRUE;
1637
1638 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1639 sym_hashes = elf_sym_hashes (input_bfd);
1640
1641 if (sym_hashes == NULL)
1642 {
1643 info->callbacks->warning
1644 (info, "no hash table available",
1645 NULL, input_bfd, input_section, (bfd_vma) 0);
1646
1647 return FALSE;
1648 }
1649
1650 /* Reset the list of remembered HI16S relocs to empty. */
1651 free_hi16s = previous_hi16s;
1652 previous_hi16s = NULL;
1653 hi16s_counter = 0;
1654
1655 rel = relocs;
1656 relend = relocs + input_section->reloc_count;
1657 for (; rel < relend; rel++)
1658 {
1659 int r_type;
1660 reloc_howto_type *howto;
1661 unsigned long r_symndx;
1662 Elf_Internal_Sym *sym;
1663 asection *sec;
1664 struct elf_link_hash_entry *h;
1665 bfd_vma relocation;
1666 bfd_reloc_status_type r;
1667
1668 r_symndx = ELF32_R_SYM (rel->r_info);
1669 r_type = ELF32_R_TYPE (rel->r_info);
1670
1671 if (r_type == R_V850_GNU_VTENTRY
1672 || r_type == R_V850_GNU_VTINHERIT)
1673 continue;
1674
1675 /* This is a final link. */
1676 howto = v850_elf_howto_table + r_type;
1677 h = NULL;
1678 sym = NULL;
1679 sec = NULL;
1680 if (r_symndx < symtab_hdr->sh_info)
1681 {
1682 sym = local_syms + r_symndx;
1683 sec = local_sections[r_symndx];
1684 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1685 #if 0
1686 {
1687 char * name;
1688
1689 name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, sym->st_name);
1690 name = (name == NULL) ? "<none>" : name;
1691 fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
1692 sec->name, name, sym->st_name,
1693 sec->output_section->vma, sec->output_offset, sym->st_value, rel->r_addend);
1694 }
1695 #endif
1696 }
1697 else
1698 {
1699 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1700
1701 while (h->root.type == bfd_link_hash_indirect
1702 || h->root.type == bfd_link_hash_warning)
1703 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1704
1705 if (h->root.type == bfd_link_hash_defined
1706 || h->root.type == bfd_link_hash_defweak)
1707 {
1708 sec = h->root.u.def.section;
1709 relocation = (h->root.u.def.value
1710 + sec->output_section->vma
1711 + sec->output_offset);
1712 #if 0
1713 fprintf (stderr, "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n",
1714 sec->name, h->root.root.string, h->root.u.def.value, sec->output_section->vma, sec->output_offset, relocation);
1715 #endif
1716 }
1717 else if (h->root.type == bfd_link_hash_undefweak)
1718 {
1719 #if 0
1720 fprintf (stderr, "undefined: sec: %s, name: %s\n",
1721 sec->name, h->root.root.string);
1722 #endif
1723 relocation = 0;
1724 }
1725 else
1726 {
1727 if (! ((*info->callbacks->undefined_symbol)
1728 (info, h->root.root.string, input_bfd,
1729 input_section, rel->r_offset, TRUE)))
1730 return FALSE;
1731 #if 0
1732 fprintf (stderr, "unknown: name: %s\n", h->root.root.string);
1733 #endif
1734 relocation = 0;
1735 }
1736 }
1737
1738 /* FIXME: We should use the addend, but the COFF relocations don't. */
1739 r = v850_elf_final_link_relocate (howto, input_bfd, output_bfd,
1740 input_section,
1741 contents, rel->r_offset,
1742 relocation, rel->r_addend,
1743 info, sec, h == NULL);
1744
1745 if (r != bfd_reloc_ok)
1746 {
1747 const char * name;
1748 const char * msg = (const char *)0;
1749
1750 if (h != NULL)
1751 name = h->root.root.string;
1752 else
1753 {
1754 name = (bfd_elf_string_from_elf_section
1755 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1756 if (name == NULL || *name == '\0')
1757 name = bfd_section_name (input_bfd, sec);
1758 }
1759
1760 switch (r)
1761 {
1762 case bfd_reloc_overflow:
1763 if (! ((*info->callbacks->reloc_overflow)
1764 (info, name, howto->name, (bfd_vma) 0,
1765 input_bfd, input_section, rel->r_offset)))
1766 return FALSE;
1767 break;
1768
1769 case bfd_reloc_undefined:
1770 if (! ((*info->callbacks->undefined_symbol)
1771 (info, name, input_bfd, input_section,
1772 rel->r_offset, TRUE)))
1773 return FALSE;
1774 break;
1775
1776 case bfd_reloc_outofrange:
1777 msg = _("internal error: out of range error");
1778 goto common_error;
1779
1780 case bfd_reloc_notsupported:
1781 msg = _("internal error: unsupported relocation error");
1782 goto common_error;
1783
1784 case bfd_reloc_dangerous:
1785 msg = _("internal error: dangerous relocation");
1786 goto common_error;
1787
1788 case bfd_reloc_gp_not_found:
1789 msg = _("could not locate special linker symbol __gp");
1790 goto common_error;
1791
1792 case bfd_reloc_ep_not_found:
1793 msg = _("could not locate special linker symbol __ep");
1794 goto common_error;
1795
1796 case bfd_reloc_ctbp_not_found:
1797 msg = _("could not locate special linker symbol __ctbp");
1798 goto common_error;
1799
1800 default:
1801 msg = _("internal error: unknown error");
1802 /* fall through */
1803
1804 common_error:
1805 if (!((*info->callbacks->warning)
1806 (info, msg, name, input_bfd, input_section,
1807 rel->r_offset)))
1808 return FALSE;
1809 break;
1810 }
1811 }
1812 }
1813
1814 return TRUE;
1815 }
1816
1817 static bfd_boolean
1818 v850_elf_gc_sweep_hook (abfd, info, sec, relocs)
1819 bfd *abfd ATTRIBUTE_UNUSED;
1820 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1821 asection *sec ATTRIBUTE_UNUSED;
1822 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
1823 {
1824 /* No got and plt entries for v850-elf. */
1825 return TRUE;
1826 }
1827
1828 static asection *
1829 v850_elf_gc_mark_hook (sec, info, rel, h, sym)
1830 asection *sec;
1831 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1832 Elf_Internal_Rela *rel;
1833 struct elf_link_hash_entry *h;
1834 Elf_Internal_Sym *sym;
1835 {
1836 if (h != NULL)
1837 {
1838 switch (ELF32_R_TYPE (rel->r_info))
1839 {
1840 case R_V850_GNU_VTINHERIT:
1841 case R_V850_GNU_VTENTRY:
1842 break;
1843
1844 default:
1845 switch (h->root.type)
1846 {
1847 case bfd_link_hash_defined:
1848 case bfd_link_hash_defweak:
1849 return h->root.u.def.section;
1850
1851 case bfd_link_hash_common:
1852 return h->root.u.c.p->section;
1853
1854 default:
1855 break;
1856 }
1857 }
1858 }
1859 else
1860 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1861
1862 return NULL;
1863 }
1864
1865 /* Set the right machine number. */
1866
1867 static bfd_boolean
1868 v850_elf_object_p (abfd)
1869 bfd *abfd;
1870 {
1871 switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH)
1872 {
1873 default:
1874 case E_V850_ARCH:
1875 bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850);
1876 break;
1877 case E_V850E_ARCH:
1878 bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850e);
1879 break;
1880 case E_V850E1_ARCH:
1881 bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850e1);
1882 break;
1883 }
1884 return TRUE;
1885 }
1886
1887 /* Store the machine number in the flags field. */
1888
1889 static void
1890 v850_elf_final_write_processing (abfd, linker)
1891 bfd *abfd;
1892 bfd_boolean linker ATTRIBUTE_UNUSED;
1893 {
1894 unsigned long val;
1895
1896 switch (bfd_get_mach (abfd))
1897 {
1898 default:
1899 case bfd_mach_v850: val = E_V850_ARCH; break;
1900 case bfd_mach_v850e: val = E_V850E_ARCH; break;
1901 case bfd_mach_v850e1: val = E_V850E1_ARCH; break;
1902 }
1903
1904 elf_elfheader (abfd)->e_flags &=~ EF_V850_ARCH;
1905 elf_elfheader (abfd)->e_flags |= val;
1906 }
1907
1908 /* Function to keep V850 specific file flags. */
1909
1910 static bfd_boolean
1911 v850_elf_set_private_flags (abfd, flags)
1912 bfd *abfd;
1913 flagword flags;
1914 {
1915 BFD_ASSERT (!elf_flags_init (abfd)
1916 || elf_elfheader (abfd)->e_flags == flags);
1917
1918 elf_elfheader (abfd)->e_flags = flags;
1919 elf_flags_init (abfd) = TRUE;
1920 return TRUE;
1921 }
1922
1923 /* Merge backend specific data from an object file
1924 to the output object file when linking. */
1925 static bfd_boolean
1926 v850_elf_merge_private_bfd_data (ibfd, obfd)
1927 bfd *ibfd;
1928 bfd *obfd;
1929 {
1930 flagword out_flags;
1931 flagword in_flags;
1932
1933 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1934 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1935 return TRUE;
1936
1937 in_flags = elf_elfheader (ibfd)->e_flags;
1938 out_flags = elf_elfheader (obfd)->e_flags;
1939
1940 if (! elf_flags_init (obfd))
1941 {
1942 /* If the input is the default architecture then do not
1943 bother setting the flags for the output architecture,
1944 instead allow future merges to do this. If no future
1945 merges ever set these flags then they will retain their
1946 unitialised values, which surprise surprise, correspond
1947 to the default values. */
1948 if (bfd_get_arch_info (ibfd)->the_default)
1949 return TRUE;
1950
1951 elf_flags_init (obfd) = TRUE;
1952 elf_elfheader (obfd)->e_flags = in_flags;
1953
1954 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
1955 && bfd_get_arch_info (obfd)->the_default)
1956 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
1957
1958 return TRUE;
1959 }
1960
1961 /* Check flag compatibility. */
1962 if (in_flags == out_flags)
1963 return TRUE;
1964
1965 if ((in_flags & EF_V850_ARCH) != (out_flags & EF_V850_ARCH)
1966 && (in_flags & EF_V850_ARCH) != E_V850_ARCH)
1967 {
1968 /* Allow v850e1 binaries to be linked with v850e binaries.
1969 Set the output binary to v850e. */
1970 if ((in_flags & EF_V850_ARCH) == E_V850E1_ARCH
1971 && (out_flags & EF_V850_ARCH) == E_V850E_ARCH)
1972 return TRUE;
1973
1974 if ((in_flags & EF_V850_ARCH) == E_V850E_ARCH
1975 && (out_flags & EF_V850_ARCH) == E_V850E1_ARCH)
1976 {
1977 elf_elfheader (obfd)->e_flags =
1978 ((out_flags & ~ EF_V850_ARCH) | E_V850E_ARCH);
1979 return TRUE;
1980 }
1981
1982 _bfd_error_handler (_("%s: Architecture mismatch with previous modules"),
1983 bfd_archive_filename (ibfd));
1984 }
1985
1986 return TRUE;
1987 }
1988
1989 /* Display the flags field. */
1990
1991 static bfd_boolean
1992 v850_elf_print_private_bfd_data (abfd, ptr)
1993 bfd *abfd;
1994 PTR ptr;
1995 {
1996 FILE * file = (FILE *) ptr;
1997
1998 BFD_ASSERT (abfd != NULL && ptr != NULL);
1999
2000 _bfd_elf_print_private_bfd_data (abfd, ptr);
2001
2002 /* xgettext:c-format */
2003 fprintf (file, _("private flags = %lx: "), elf_elfheader (abfd)->e_flags);
2004
2005 switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH)
2006 {
2007 default:
2008 case E_V850_ARCH: fprintf (file, _("v850 architecture")); break;
2009 case E_V850E_ARCH: fprintf (file, _("v850e architecture")); break;
2010 case E_V850E1_ARCH: fprintf (file, _("v850e1 architecture")); break;
2011 }
2012
2013 fputc ('\n', file);
2014
2015 return TRUE;
2016 }
2017
2018 /* V850 ELF uses four common sections. One is the usual one, and the
2019 others are for (small) objects in one of the special data areas:
2020 small, tiny and zero. All the objects are kept together, and then
2021 referenced via the gp register, the ep register or the r0 register
2022 respectively, which yields smaller, faster assembler code. This
2023 approach is copied from elf32-mips.c. */
2024
2025 static asection v850_elf_scom_section;
2026 static asymbol v850_elf_scom_symbol;
2027 static asymbol * v850_elf_scom_symbol_ptr;
2028 static asection v850_elf_tcom_section;
2029 static asymbol v850_elf_tcom_symbol;
2030 static asymbol * v850_elf_tcom_symbol_ptr;
2031 static asection v850_elf_zcom_section;
2032 static asymbol v850_elf_zcom_symbol;
2033 static asymbol * v850_elf_zcom_symbol_ptr;
2034
2035 /* Given a BFD section, try to locate the
2036 corresponding ELF section index. */
2037
2038 static bfd_boolean
2039 v850_elf_section_from_bfd_section (abfd, sec, retval)
2040 bfd *abfd ATTRIBUTE_UNUSED;
2041 asection *sec;
2042 int *retval;
2043 {
2044 if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0)
2045 *retval = SHN_V850_SCOMMON;
2046 else if (strcmp (bfd_get_section_name (abfd, sec), ".tcommon") == 0)
2047 *retval = SHN_V850_TCOMMON;
2048 else if (strcmp (bfd_get_section_name (abfd, sec), ".zcommon") == 0)
2049 *retval = SHN_V850_ZCOMMON;
2050 else
2051 return FALSE;
2052
2053 return TRUE;
2054 }
2055
2056 /* Handle the special V850 section numbers that a symbol may use. */
2057
2058 static void
2059 v850_elf_symbol_processing (abfd, asym)
2060 bfd *abfd;
2061 asymbol *asym;
2062 {
2063 elf_symbol_type * elfsym = (elf_symbol_type *) asym;
2064 unsigned int indx;
2065
2066 indx = elfsym->internal_elf_sym.st_shndx;
2067
2068 /* If the section index is an "ordinary" index, then it may
2069 refer to a v850 specific section created by the assembler.
2070 Check the section's type and change the index it matches.
2071
2072 FIXME: Should we alter the st_shndx field as well ? */
2073
2074 if (indx < elf_numsections (abfd))
2075 switch (elf_elfsections(abfd)[indx]->sh_type)
2076 {
2077 case SHT_V850_SCOMMON:
2078 indx = SHN_V850_SCOMMON;
2079 break;
2080
2081 case SHT_V850_TCOMMON:
2082 indx = SHN_V850_TCOMMON;
2083 break;
2084
2085 case SHT_V850_ZCOMMON:
2086 indx = SHN_V850_ZCOMMON;
2087 break;
2088
2089 default:
2090 break;
2091 }
2092
2093 switch (indx)
2094 {
2095 case SHN_V850_SCOMMON:
2096 if (v850_elf_scom_section.name == NULL)
2097 {
2098 /* Initialize the small common section. */
2099 v850_elf_scom_section.name = ".scommon";
2100 v850_elf_scom_section.flags = SEC_IS_COMMON | SEC_ALLOC | SEC_DATA;
2101 v850_elf_scom_section.output_section = & v850_elf_scom_section;
2102 v850_elf_scom_section.symbol = & v850_elf_scom_symbol;
2103 v850_elf_scom_section.symbol_ptr_ptr = & v850_elf_scom_symbol_ptr;
2104 v850_elf_scom_symbol.name = ".scommon";
2105 v850_elf_scom_symbol.flags = BSF_SECTION_SYM;
2106 v850_elf_scom_symbol.section = & v850_elf_scom_section;
2107 v850_elf_scom_symbol_ptr = & v850_elf_scom_symbol;
2108 }
2109 asym->section = & v850_elf_scom_section;
2110 asym->value = elfsym->internal_elf_sym.st_size;
2111 break;
2112
2113 case SHN_V850_TCOMMON:
2114 if (v850_elf_tcom_section.name == NULL)
2115 {
2116 /* Initialize the tcommon section. */
2117 v850_elf_tcom_section.name = ".tcommon";
2118 v850_elf_tcom_section.flags = SEC_IS_COMMON;
2119 v850_elf_tcom_section.output_section = & v850_elf_tcom_section;
2120 v850_elf_tcom_section.symbol = & v850_elf_tcom_symbol;
2121 v850_elf_tcom_section.symbol_ptr_ptr = & v850_elf_tcom_symbol_ptr;
2122 v850_elf_tcom_symbol.name = ".tcommon";
2123 v850_elf_tcom_symbol.flags = BSF_SECTION_SYM;
2124 v850_elf_tcom_symbol.section = & v850_elf_tcom_section;
2125 v850_elf_tcom_symbol_ptr = & v850_elf_tcom_symbol;
2126 }
2127 asym->section = & v850_elf_tcom_section;
2128 asym->value = elfsym->internal_elf_sym.st_size;
2129 break;
2130
2131 case SHN_V850_ZCOMMON:
2132 if (v850_elf_zcom_section.name == NULL)
2133 {
2134 /* Initialize the zcommon section. */
2135 v850_elf_zcom_section.name = ".zcommon";
2136 v850_elf_zcom_section.flags = SEC_IS_COMMON;
2137 v850_elf_zcom_section.output_section = & v850_elf_zcom_section;
2138 v850_elf_zcom_section.symbol = & v850_elf_zcom_symbol;
2139 v850_elf_zcom_section.symbol_ptr_ptr = & v850_elf_zcom_symbol_ptr;
2140 v850_elf_zcom_symbol.name = ".zcommon";
2141 v850_elf_zcom_symbol.flags = BSF_SECTION_SYM;
2142 v850_elf_zcom_symbol.section = & v850_elf_zcom_section;
2143 v850_elf_zcom_symbol_ptr = & v850_elf_zcom_symbol;
2144 }
2145 asym->section = & v850_elf_zcom_section;
2146 asym->value = elfsym->internal_elf_sym.st_size;
2147 break;
2148 }
2149 }
2150
2151 /* Hook called by the linker routine which adds symbols from an object
2152 file. We must handle the special v850 section numbers here. */
2153
2154 static bfd_boolean
2155 v850_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
2156 bfd *abfd;
2157 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2158 const Elf_Internal_Sym *sym;
2159 const char **namep ATTRIBUTE_UNUSED;
2160 flagword *flagsp ATTRIBUTE_UNUSED;
2161 asection **secp;
2162 bfd_vma *valp;
2163 {
2164 unsigned int indx = sym->st_shndx;
2165
2166 /* If the section index is an "ordinary" index, then it may
2167 refer to a v850 specific section created by the assembler.
2168 Check the section's type and change the index it matches.
2169
2170 FIXME: Should we alter the st_shndx field as well ? */
2171
2172 if (indx < elf_numsections (abfd))
2173 switch (elf_elfsections(abfd)[indx]->sh_type)
2174 {
2175 case SHT_V850_SCOMMON:
2176 indx = SHN_V850_SCOMMON;
2177 break;
2178
2179 case SHT_V850_TCOMMON:
2180 indx = SHN_V850_TCOMMON;
2181 break;
2182
2183 case SHT_V850_ZCOMMON:
2184 indx = SHN_V850_ZCOMMON;
2185 break;
2186
2187 default:
2188 break;
2189 }
2190
2191 switch (indx)
2192 {
2193 case SHN_V850_SCOMMON:
2194 *secp = bfd_make_section_old_way (abfd, ".scommon");
2195 (*secp)->flags |= SEC_IS_COMMON;
2196 *valp = sym->st_size;
2197 break;
2198
2199 case SHN_V850_TCOMMON:
2200 *secp = bfd_make_section_old_way (abfd, ".tcommon");
2201 (*secp)->flags |= SEC_IS_COMMON;
2202 *valp = sym->st_size;
2203 break;
2204
2205 case SHN_V850_ZCOMMON:
2206 *secp = bfd_make_section_old_way (abfd, ".zcommon");
2207 (*secp)->flags |= SEC_IS_COMMON;
2208 *valp = sym->st_size;
2209 break;
2210 }
2211
2212 return TRUE;
2213 }
2214
2215 static bfd_boolean
2216 v850_elf_link_output_symbol_hook (abfd, info, name, sym, input_sec)
2217 bfd *abfd ATTRIBUTE_UNUSED;
2218 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2219 const char *name ATTRIBUTE_UNUSED;
2220 Elf_Internal_Sym *sym;
2221 asection *input_sec;
2222 {
2223 /* If we see a common symbol, which implies a relocatable link, then
2224 if a symbol was in a special common section in an input file, mark
2225 it as a special common in the output file. */
2226
2227 if (sym->st_shndx == SHN_COMMON)
2228 {
2229 if (strcmp (input_sec->name, ".scommon") == 0)
2230 sym->st_shndx = SHN_V850_SCOMMON;
2231 else if (strcmp (input_sec->name, ".tcommon") == 0)
2232 sym->st_shndx = SHN_V850_TCOMMON;
2233 else if (strcmp (input_sec->name, ".zcommon") == 0)
2234 sym->st_shndx = SHN_V850_ZCOMMON;
2235 }
2236
2237 return TRUE;
2238 }
2239
2240 static bfd_boolean
2241 v850_elf_section_from_shdr (abfd, hdr, name)
2242 bfd *abfd;
2243 Elf_Internal_Shdr *hdr;
2244 const char *name;
2245 {
2246 /* There ought to be a place to keep ELF backend specific flags, but
2247 at the moment there isn't one. We just keep track of the
2248 sections by their name, instead. */
2249
2250 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2251 return FALSE;
2252
2253 switch (hdr->sh_type)
2254 {
2255 case SHT_V850_SCOMMON:
2256 case SHT_V850_TCOMMON:
2257 case SHT_V850_ZCOMMON:
2258 if (! bfd_set_section_flags (abfd, hdr->bfd_section,
2259 (bfd_get_section_flags (abfd,
2260 hdr->bfd_section)
2261 | SEC_IS_COMMON)))
2262 return FALSE;
2263 }
2264
2265 return TRUE;
2266 }
2267
2268 /* Set the correct type for a V850 ELF section. We do this
2269 by the section name, which is a hack, but ought to work. */
2270
2271 static bfd_boolean
2272 v850_elf_fake_sections (abfd, hdr, sec)
2273 bfd *abfd ATTRIBUTE_UNUSED;
2274 Elf_Internal_Shdr *hdr;
2275 asection *sec;
2276 {
2277 register const char * name;
2278
2279 name = bfd_get_section_name (abfd, sec);
2280
2281 if (strcmp (name, ".scommon") == 0)
2282 {
2283 hdr->sh_type = SHT_V850_SCOMMON;
2284 }
2285 else if (strcmp (name, ".tcommon") == 0)
2286 {
2287 hdr->sh_type = SHT_V850_TCOMMON;
2288 }
2289 else if (strcmp (name, ".zcommon") == 0)
2290 hdr->sh_type = SHT_V850_ZCOMMON;
2291
2292 return TRUE;
2293 }
2294
2295 /* Delete some bytes from a section while relaxing. */
2296
2297 static bfd_boolean
2298 v850_elf_relax_delete_bytes (abfd, sec, addr, toaddr, count)
2299 bfd *abfd;
2300 asection *sec;
2301 bfd_vma addr;
2302 bfd_vma toaddr;
2303 int count;
2304 {
2305 Elf_Internal_Shdr *symtab_hdr;
2306 Elf32_External_Sym *extsyms;
2307 Elf32_External_Sym *esym;
2308 Elf32_External_Sym *esymend;
2309 int index;
2310 unsigned int sec_shndx;
2311 bfd_byte *contents;
2312 Elf_Internal_Rela *irel;
2313 Elf_Internal_Rela *irelend;
2314 struct elf_link_hash_entry *sym_hash;
2315 Elf_Internal_Shdr *shndx_hdr;
2316 Elf_External_Sym_Shndx *shndx;
2317
2318 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2319 extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
2320
2321 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
2322
2323 contents = elf_section_data (sec)->this_hdr.contents;
2324
2325 /* The deletion must stop at the next ALIGN reloc for an alignment
2326 power larger than the number of bytes we are deleting. */
2327
2328 /* Actually delete the bytes. */
2329 #if (DEBUG_RELAX & 2)
2330 fprintf (stderr, "relax_delete: contents: sec: %s %p .. %p %x\n",
2331 sec->name, addr, toaddr, count );
2332 #endif
2333 memmove (contents + addr, contents + addr + count,
2334 toaddr - addr - count);
2335 memset (contents + toaddr-count, 0, count);
2336
2337 /* Adjust all the relocs. */
2338 irel = elf_section_data (sec)->relocs;
2339 irelend = irel + sec->reloc_count;
2340 shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
2341 shndx = (Elf_External_Sym_Shndx *) shndx_hdr->contents;
2342
2343 for (; irel < irelend; irel++)
2344 {
2345 bfd_vma raddr, paddr, symval;
2346 Elf_Internal_Sym isym;
2347
2348 /* Get the new reloc address. */
2349 raddr = irel->r_offset;
2350 if ((raddr >= (addr + count) && raddr < toaddr))
2351 irel->r_offset -= count;
2352
2353 if (raddr >= addr && raddr < addr + count)
2354 {
2355 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2356 (int) R_V850_NONE);
2357 continue;
2358 }
2359
2360 if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_ALIGN)
2361 continue;
2362
2363 bfd_elf32_swap_symbol_in (abfd,
2364 extsyms + ELF32_R_SYM (irel->r_info),
2365 shndx ? shndx + ELF32_R_SYM (irel->r_info) : NULL,
2366 & isym);
2367
2368 if (isym.st_shndx != sec_shndx)
2369 continue;
2370
2371 /* Get the value of the symbol referred to by the reloc. */
2372 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2373 {
2374 symval = isym.st_value;
2375 #if (DEBUG_RELAX & 2)
2376 {
2377 char * name = bfd_elf_string_from_elf_section
2378 (abfd, symtab_hdr->sh_link, isym.st_name);
2379 fprintf (stderr,
2380 "relax_delete: local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
2381 sec->name, name, isym.st_name,
2382 sec->output_section->vma, sec->output_offset,
2383 isym.st_value, irel->r_addend);
2384 }
2385 #endif
2386 }
2387 else
2388 {
2389 unsigned long indx;
2390 struct elf_link_hash_entry * h;
2391
2392 /* An external symbol. */
2393 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2394
2395 h = elf_sym_hashes (abfd) [indx];
2396 BFD_ASSERT (h != NULL);
2397
2398 symval = h->root.u.def.value;
2399 #if (DEBUG_RELAX & 2)
2400 fprintf (stderr,
2401 "relax_delete: defined: sec: %s, name: %s, value: %x + %x + %x addend %x\n",
2402 sec->name, h->root.root.string, h->root.u.def.value,
2403 sec->output_section->vma, sec->output_offset, irel->r_addend);
2404 #endif
2405 }
2406
2407 paddr = symval + irel->r_addend;
2408
2409 if ( (symval >= addr + count && symval < toaddr)
2410 && (paddr < addr + count || paddr >= toaddr))
2411 irel->r_addend += count;
2412 else if ( (symval < addr + count || symval >= toaddr)
2413 && (paddr >= addr + count && paddr < toaddr))
2414 irel->r_addend -= count;
2415 }
2416
2417 /* Adjust the local symbols defined in this section. */
2418 esym = extsyms;
2419 esymend = esym + symtab_hdr->sh_info;
2420
2421 for (; esym < esymend; esym++, shndx = (shndx ? shndx + 1 : NULL))
2422 {
2423 Elf_Internal_Sym isym;
2424
2425 bfd_elf32_swap_symbol_in (abfd, esym, shndx, & isym);
2426
2427 if (isym.st_shndx == sec_shndx
2428 && isym.st_value >= addr + count
2429 && isym.st_value < toaddr)
2430 {
2431 isym.st_value -= count;
2432
2433 if (isym.st_value + isym.st_size >= toaddr)
2434 isym.st_size += count;
2435
2436 bfd_elf32_swap_symbol_out (abfd, & isym, esym, shndx);
2437 }
2438 else if (isym.st_shndx == sec_shndx
2439 && isym.st_value < addr + count)
2440 {
2441 if (isym.st_value+isym.st_size >= addr + count
2442 && isym.st_value+isym.st_size < toaddr)
2443 isym.st_size -= count;
2444
2445 if (isym.st_value >= addr
2446 && isym.st_value < addr + count)
2447 isym.st_value = addr;
2448
2449 bfd_elf32_swap_symbol_out (abfd, & isym, esym, shndx);
2450 }
2451 }
2452
2453 /* Now adjust the global symbols defined in this section. */
2454 esym = extsyms + symtab_hdr->sh_info;
2455 esymend = extsyms + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym));
2456
2457 for (index = 0; esym < esymend; esym ++, index ++)
2458 {
2459 Elf_Internal_Sym isym;
2460
2461 bfd_elf32_swap_symbol_in (abfd, esym, shndx, & isym);
2462 sym_hash = elf_sym_hashes (abfd) [index];
2463
2464 if (isym.st_shndx == sec_shndx
2465 && ((sym_hash)->root.type == bfd_link_hash_defined
2466 || (sym_hash)->root.type == bfd_link_hash_defweak)
2467 && (sym_hash)->root.u.def.section == sec
2468 && (sym_hash)->root.u.def.value >= addr + count
2469 && (sym_hash)->root.u.def.value < toaddr)
2470 {
2471 if ((sym_hash)->root.u.def.value + isym.st_size >= toaddr)
2472 {
2473 isym.st_size += count;
2474 bfd_elf32_swap_symbol_out (abfd, & isym, esym, shndx);
2475 }
2476
2477 (sym_hash)->root.u.def.value -= count;
2478 }
2479 else if (isym.st_shndx == sec_shndx
2480 && ((sym_hash)->root.type == bfd_link_hash_defined
2481 || (sym_hash)->root.type == bfd_link_hash_defweak)
2482 && (sym_hash)->root.u.def.section == sec
2483 && (sym_hash)->root.u.def.value < addr + count)
2484 {
2485 if ((sym_hash)->root.u.def.value+isym.st_size >= addr + count
2486 && (sym_hash)->root.u.def.value+isym.st_size < toaddr)
2487 isym.st_size -= count;
2488
2489 if ((sym_hash)->root.u.def.value >= addr
2490 && (sym_hash)->root.u.def.value < addr + count)
2491 (sym_hash)->root.u.def.value = addr;
2492
2493 bfd_elf32_swap_symbol_out (abfd, & isym, esym, shndx);
2494 }
2495
2496 if (shndx)
2497 ++ shndx;
2498 }
2499
2500 return TRUE;
2501 }
2502
2503 #define NOP_OPCODE (0x0000)
2504 #define MOVHI 0x0640 /* 4byte */
2505 #define MOVHI_MASK 0x07e0
2506 #define MOVHI_R1(insn) ((insn) & 0x1f) /* 4byte */
2507 #define MOVHI_R2(insn) ((insn) >> 11)
2508 #define MOVEA 0x0620 /* 2byte */
2509 #define MOVEA_MASK 0x07e0
2510 #define MOVEA_R1(insn) ((insn) & 0x1f)
2511 #define MOVEA_R2(insn) ((insn) >> 11)
2512 #define JARL_4 0x00040780 /* 4byte */
2513 #define JARL_4_MASK 0xFFFF07FF
2514 #define JARL_R2(insn) (int)(((insn) & (~JARL_4_MASK)) >> 11)
2515 #define ADD_I 0x0240 /* 2byte */
2516 #define ADD_I_MASK 0x07e0
2517 #define ADD_I5(insn) ((((insn) & 0x001f) << 11) >> 11) /* 2byte */
2518 #define ADD_R2(insn) ((insn) >> 11)
2519 #define JMP_R 0x0060 /* 2byte */
2520 #define JMP_R_MASK 0xFFE0
2521 #define JMP_R1(insn) ((insn) & 0x1f)
2522
2523 static bfd_boolean
2524 v850_elf_relax_section (abfd, sec, link_info, again)
2525 bfd *abfd;
2526 asection *sec;
2527 struct bfd_link_info *link_info;
2528 bfd_boolean *again;
2529 {
2530 Elf_Internal_Shdr *symtab_hdr;
2531 Elf_Internal_Rela *internal_relocs;
2532 Elf_Internal_Rela *irel;
2533 Elf_Internal_Rela *irelend;
2534 Elf_Internal_Rela *irelalign = NULL;
2535 Elf_Internal_Sym *isymbuf = NULL;
2536 bfd_byte *contents = NULL;
2537 bfd_vma addr = 0;
2538 bfd_vma toaddr;
2539 int align_pad_size = 0;
2540 bfd_boolean result = TRUE;
2541
2542 *again = FALSE;
2543
2544 if (link_info->relocatable
2545 || (sec->flags & SEC_RELOC) == 0
2546 || sec->reloc_count == 0)
2547 return TRUE;
2548
2549 /* If this is the first time we have been called
2550 for this section, initialize the cooked size. */
2551 if (sec->_cooked_size == 0)
2552 sec->_cooked_size = sec->_raw_size;
2553
2554 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
2555
2556 internal_relocs = (_bfd_elf_link_read_relocs
2557 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
2558 link_info->keep_memory));
2559 if (internal_relocs == NULL)
2560 goto error_return;
2561
2562 irelend = internal_relocs + sec->reloc_count;
2563
2564 while (addr < sec->_cooked_size)
2565 {
2566 toaddr = sec->_cooked_size;
2567
2568 for (irel = internal_relocs; irel < irelend; irel ++)
2569 if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_ALIGN
2570 && irel->r_offset > addr
2571 && irel->r_offset < toaddr)
2572 toaddr = irel->r_offset;
2573
2574 #ifdef DEBUG_RELAX
2575 fprintf (stderr, "relax region 0x%x to 0x%x align pad %d\n",
2576 addr, toaddr, align_pad_size);
2577 #endif
2578 if (irelalign)
2579 {
2580 bfd_vma alignto;
2581 bfd_vma alignmoveto;
2582
2583 alignmoveto = BFD_ALIGN (addr - align_pad_size, 1 << irelalign->r_addend);
2584 alignto = BFD_ALIGN (addr, 1 << irelalign->r_addend);
2585
2586 if (alignmoveto < alignto)
2587 {
2588 unsigned int i;
2589
2590 align_pad_size = alignto - alignmoveto;
2591 #ifdef DEBUG_RELAX
2592 fprintf (stderr, "relax move region 0x%x to 0x%x delete size 0x%x\n",
2593 alignmoveto, toaddr, align_pad_size);
2594 #endif
2595 if (!v850_elf_relax_delete_bytes (abfd, sec, alignmoveto,
2596 toaddr, align_pad_size))
2597 goto error_return;
2598
2599 for (i = BFD_ALIGN (toaddr - align_pad_size, 1);
2600 (i + 1) < toaddr; i += 2)
2601 bfd_put_16 (abfd, NOP_OPCODE, contents + i);
2602
2603 addr = alignmoveto;
2604 }
2605 else
2606 align_pad_size = 0;
2607 }
2608
2609 for (irel = internal_relocs; irel < irelend; irel++)
2610 {
2611 bfd_vma laddr;
2612 bfd_vma addend;
2613 bfd_vma symval;
2614 int insn[5];
2615 int no_match = -1;
2616 Elf_Internal_Rela *hi_irelfn;
2617 Elf_Internal_Rela *lo_irelfn;
2618 Elf_Internal_Rela *irelcall;
2619 bfd_signed_vma foff;
2620
2621 if (! (irel->r_offset >= addr && irel->r_offset < toaddr
2622 && (ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGCALL
2623 || ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGJUMP)))
2624 continue;
2625
2626 #ifdef DEBUG_RELAX
2627 fprintf (stderr, "relax check r_info 0x%x r_offset 0x%x r_addend 0x%x\n",
2628 irel->r_info,
2629 irel->r_offset,
2630 irel->r_addend );
2631 #endif
2632
2633 /* Get the section contents. */
2634 if (contents == NULL)
2635 {
2636 if (elf_section_data (sec)->this_hdr.contents != NULL)
2637 contents = elf_section_data (sec)->this_hdr.contents;
2638 else
2639 {
2640 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
2641 if (contents == NULL)
2642 goto error_return;
2643
2644 if (! bfd_get_section_contents (abfd, sec, contents,
2645 (file_ptr) 0, sec->_raw_size))
2646 goto error_return;
2647 }
2648 }
2649
2650 /* Read this BFD's local symbols if we haven't done so already. */
2651 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
2652 {
2653 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2654 if (isymbuf == NULL)
2655 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2656 symtab_hdr->sh_info, 0,
2657 NULL, NULL, NULL);
2658 if (isymbuf == NULL)
2659 goto error_return;
2660 }
2661
2662 laddr = irel->r_offset;
2663
2664 if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGCALL)
2665 {
2666 /* Check code for -mlong-calls output. */
2667 if (laddr + 16 <= (bfd_vma) sec->_raw_size)
2668 {
2669 insn[0] = bfd_get_16 (abfd, contents + laddr);
2670 insn[1] = bfd_get_16 (abfd, contents + laddr + 4);
2671 insn[2] = bfd_get_32 (abfd, contents + laddr + 8);
2672 insn[3] = bfd_get_16 (abfd, contents + laddr + 12);
2673 insn[4] = bfd_get_16 (abfd, contents + laddr + 14);
2674
2675 if ((insn[0] & MOVHI_MASK) != MOVHI
2676 || MOVHI_R1 (insn[0]) != 0)
2677 no_match = 0;
2678
2679 if (no_match < 0
2680 && ((insn[1] & MOVEA_MASK) != MOVEA
2681 || MOVHI_R2 (insn[0]) != MOVEA_R1 (insn[1])))
2682 no_match = 1;
2683
2684 if (no_match < 0
2685 && (insn[2] & JARL_4_MASK) != JARL_4)
2686 no_match = 2;
2687
2688 if (no_match < 0
2689 && ((insn[3] & ADD_I_MASK) != ADD_I
2690 || ADD_I5 (insn[3]) != 4
2691 || JARL_R2 (insn[2]) != ADD_R2 (insn[3])))
2692 no_match = 3;
2693
2694 if (no_match < 0
2695 && ((insn[4] & JMP_R_MASK) != JMP_R
2696 || MOVEA_R2 (insn[1]) != JMP_R1 (insn[4])))
2697 no_match = 4;
2698 }
2699 else
2700 {
2701 ((*_bfd_error_handler)
2702 ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized insns",
2703 bfd_get_filename (abfd), (unsigned long) irel->r_offset));
2704
2705 continue;
2706 }
2707
2708 if (no_match >= 0)
2709 {
2710 ((*_bfd_error_handler)
2711 ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized insn 0x%x",
2712 bfd_get_filename (abfd), (unsigned long) irel->r_offset+no_match, insn[no_match]));
2713
2714 continue;
2715 }
2716
2717 /* Get the reloc for the address from which the register is
2718 being loaded. This reloc will tell us which function is
2719 actually being called. */
2720 for (hi_irelfn = internal_relocs; hi_irelfn < irelend; hi_irelfn ++)
2721 if (hi_irelfn->r_offset == laddr + 2
2722 && ELF32_R_TYPE (hi_irelfn->r_info)
2723 == (int) R_V850_HI16_S)
2724 break;
2725
2726 for (lo_irelfn = internal_relocs; lo_irelfn < irelend; lo_irelfn ++)
2727 if (lo_irelfn->r_offset == laddr + 6
2728 && ELF32_R_TYPE (lo_irelfn->r_info)
2729 == (int) R_V850_LO16)
2730 break;
2731
2732 for (irelcall = internal_relocs; irelcall < irelend; irelcall ++)
2733 if (irelcall->r_offset == laddr + 8
2734 && ELF32_R_TYPE (irelcall->r_info)
2735 == (int) R_V850_22_PCREL)
2736 break;
2737
2738 if ( hi_irelfn == irelend
2739 || lo_irelfn == irelend
2740 || irelcall == irelend)
2741 {
2742 ((*_bfd_error_handler)
2743 ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized reloc",
2744 bfd_get_filename (abfd), (unsigned long) irel->r_offset ));
2745
2746 continue;
2747 }
2748
2749 if (ELF32_R_SYM (irelcall->r_info) < symtab_hdr->sh_info)
2750 {
2751 Elf_Internal_Sym * isym;
2752
2753 /* A local symbol. */
2754 isym = isymbuf + ELF32_R_SYM (irelcall->r_info);
2755
2756 symval = isym->st_value;
2757 }
2758 else
2759 {
2760 unsigned long indx;
2761 struct elf_link_hash_entry * h;
2762
2763 /* An external symbol. */
2764 indx = ELF32_R_SYM (irelcall->r_info) - symtab_hdr->sh_info;
2765 h = elf_sym_hashes (abfd)[indx];
2766 BFD_ASSERT (h != NULL);
2767
2768 if ( h->root.type != bfd_link_hash_defined
2769 && h->root.type != bfd_link_hash_defweak)
2770 /* This appears to be a reference to an undefined
2771 symbol. Just ignore it--it will be caught by the
2772 regular reloc processing. */
2773 continue;
2774
2775 symval = h->root.u.def.value;
2776 }
2777
2778 if (symval + irelcall->r_addend != irelcall->r_offset + 4)
2779 {
2780 ((*_bfd_error_handler)
2781 ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized reloc 0x%lx",
2782 bfd_get_filename (abfd), (unsigned long) irel->r_offset, irelcall->r_offset ));
2783
2784 continue;
2785 }
2786
2787 /* Get the value of the symbol referred to by the reloc. */
2788 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
2789 {
2790 Elf_Internal_Sym *isym;
2791 asection *sym_sec;
2792
2793 /* A local symbol. */
2794 isym = isymbuf + ELF32_R_SYM (hi_irelfn->r_info);
2795
2796 if (isym->st_shndx == SHN_UNDEF)
2797 sym_sec = bfd_und_section_ptr;
2798 else if (isym->st_shndx == SHN_ABS)
2799 sym_sec = bfd_abs_section_ptr;
2800 else if (isym->st_shndx == SHN_COMMON)
2801 sym_sec = bfd_com_section_ptr;
2802 else
2803 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2804 symval = (isym->st_value
2805 + sym_sec->output_section->vma
2806 + sym_sec->output_offset);
2807 }
2808 else
2809 {
2810 unsigned long indx;
2811 struct elf_link_hash_entry *h;
2812
2813 /* An external symbol. */
2814 indx = ELF32_R_SYM (hi_irelfn->r_info) - symtab_hdr->sh_info;
2815 h = elf_sym_hashes (abfd)[indx];
2816 BFD_ASSERT (h != NULL);
2817
2818 if ( h->root.type != bfd_link_hash_defined
2819 && h->root.type != bfd_link_hash_defweak)
2820 /* This appears to be a reference to an undefined
2821 symbol. Just ignore it--it will be caught by the
2822 regular reloc processing. */
2823 continue;
2824
2825 symval = (h->root.u.def.value
2826 + h->root.u.def.section->output_section->vma
2827 + h->root.u.def.section->output_offset);
2828 }
2829
2830 addend = irel->r_addend;
2831
2832 foff = (symval + addend
2833 - (irel->r_offset
2834 + sec->output_section->vma
2835 + sec->output_offset
2836 + 4));
2837 #ifdef DEBUG_RELAX
2838 fprintf (stderr, "relax longcall r_offset 0x%x ptr 0x%x symbol 0x%x addend 0x%x distance 0x%x\n",
2839 irel->r_offset,
2840 (irel->r_offset
2841 + sec->output_section->vma
2842 + sec->output_offset),
2843 symval, addend, foff);
2844 #endif
2845
2846 if (foff < -0x100000 || foff >= 0x100000)
2847 /* After all that work, we can't shorten this function call. */
2848 continue;
2849
2850 /* For simplicity of coding, we are going to modify the section
2851 contents, the section relocs, and the BFD symbol table. We
2852 must tell the rest of the code not to free up this
2853 information. It would be possible to instead create a table
2854 of changes which have to be made, as is done in coff-mips.c;
2855 that would be more work, but would require less memory when
2856 the linker is run. */
2857 elf_section_data (sec)->relocs = internal_relocs;
2858 elf_section_data (sec)->this_hdr.contents = contents;
2859 symtab_hdr->contents = (bfd_byte *) isymbuf;
2860
2861 /* Replace the long call with a jarl. */
2862 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_22_PCREL);
2863
2864 addend = 0;
2865
2866 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
2867 /* If this needs to be changed because of future relaxing,
2868 it will be handled here like other internal IND12W
2869 relocs. */
2870 bfd_put_32 (abfd,
2871 0x00000780 | (JARL_R2 (insn[2])<<11) | ((addend << 16) & 0xffff) | ((addend >> 16) & 0xf),
2872 contents + irel->r_offset);
2873 else
2874 /* We can't fully resolve this yet, because the external
2875 symbol value may be changed by future relaxing.
2876 We let the final link phase handle it. */
2877 bfd_put_32 (abfd, 0x00000780 | (JARL_R2 (insn[2])<<11),
2878 contents + irel->r_offset);
2879
2880 hi_irelfn->r_info =
2881 ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_NONE);
2882 lo_irelfn->r_info =
2883 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_V850_NONE);
2884 irelcall->r_info =
2885 ELF32_R_INFO (ELF32_R_SYM (irelcall->r_info), R_V850_NONE);
2886
2887 if (! v850_elf_relax_delete_bytes (abfd, sec,
2888 irel->r_offset + 4, toaddr, 12))
2889 goto error_return;
2890
2891 align_pad_size += 12;
2892 }
2893 else if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGJUMP)
2894 {
2895 /* Check code for -mlong-jumps output. */
2896 if (laddr + 10 <= (bfd_vma) sec->_raw_size)
2897 {
2898 insn[0] = bfd_get_16 (abfd, contents + laddr);
2899 insn[1] = bfd_get_16 (abfd, contents + laddr + 4);
2900 insn[2] = bfd_get_16 (abfd, contents + laddr + 8);
2901
2902 if ((insn[0] & MOVHI_MASK) != MOVHI
2903 || MOVHI_R1 (insn[0]) != 0)
2904 no_match = 0;
2905
2906 if (no_match < 0
2907 && ((insn[1] & MOVEA_MASK) != MOVEA
2908 || MOVHI_R2 (insn[0]) != MOVEA_R1 (insn[1])))
2909 no_match = 1;
2910
2911 if (no_match < 0
2912 && ((insn[2] & JMP_R_MASK) != JMP_R
2913 || MOVEA_R2 (insn[1]) != JMP_R1 (insn[2])))
2914 no_match = 4;
2915 }
2916 else
2917 {
2918 ((*_bfd_error_handler)
2919 ("%s: 0x%lx: warning: R_V850_LONGJUMP points to unrecognized insns",
2920 bfd_get_filename (abfd), (unsigned long) irel->r_offset));
2921
2922 continue;
2923 }
2924
2925 if (no_match >= 0)
2926 {
2927 ((*_bfd_error_handler)
2928 ("%s: 0x%lx: warning: R_V850_LONGJUMP points to unrecognized insn 0x%x",
2929 bfd_get_filename (abfd), (unsigned long) irel->r_offset+no_match, insn[no_match]));
2930
2931 continue;
2932 }
2933
2934 /* Get the reloc for the address from which the register is
2935 being loaded. This reloc will tell us which function is
2936 actually being called. */
2937 for (hi_irelfn = internal_relocs; hi_irelfn < irelend; hi_irelfn ++)
2938 if (hi_irelfn->r_offset == laddr + 2
2939 && ELF32_R_TYPE (hi_irelfn->r_info) == (int) R_V850_HI16_S)
2940 break;
2941
2942 for (lo_irelfn = internal_relocs; lo_irelfn < irelend; lo_irelfn ++)
2943 if (lo_irelfn->r_offset == laddr + 6
2944 && ELF32_R_TYPE (lo_irelfn->r_info) == (int) R_V850_LO16)
2945 break;
2946
2947 if ( hi_irelfn == irelend
2948 || lo_irelfn == irelend)
2949 {
2950 ((*_bfd_error_handler)
2951 ("%s: 0x%lx: warning: R_V850_LONGJUMP points to unrecognized reloc",
2952 bfd_get_filename (abfd), (unsigned long) irel->r_offset ));
2953
2954 continue;
2955 }
2956
2957 /* Get the value of the symbol referred to by the reloc. */
2958 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
2959 {
2960 Elf_Internal_Sym * isym;
2961 asection * sym_sec;
2962
2963 /* A local symbol. */
2964 isym = isymbuf + ELF32_R_SYM (hi_irelfn->r_info);
2965
2966 if (isym->st_shndx == SHN_UNDEF)
2967 sym_sec = bfd_und_section_ptr;
2968 else if (isym->st_shndx == SHN_ABS)
2969 sym_sec = bfd_abs_section_ptr;
2970 else if (isym->st_shndx == SHN_COMMON)
2971 sym_sec = bfd_com_section_ptr;
2972 else
2973 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2974 symval = (isym->st_value
2975 + sym_sec->output_section->vma
2976 + sym_sec->output_offset);
2977 #ifdef DEBUG_RELAX
2978 {
2979 char * name = bfd_elf_string_from_elf_section
2980 (abfd, symtab_hdr->sh_link, isym->st_name);
2981
2982 fprintf (stderr, "relax long jump local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
2983 sym_sec->name, name, isym->st_name,
2984 sym_sec->output_section->vma,
2985 sym_sec->output_offset,
2986 isym->st_value, irel->r_addend);
2987 }
2988 #endif
2989 }
2990 else
2991 {
2992 unsigned long indx;
2993 struct elf_link_hash_entry * h;
2994
2995 /* An external symbol. */
2996 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2997 h = elf_sym_hashes (abfd)[indx];
2998 BFD_ASSERT (h != NULL);
2999
3000 if ( h->root.type != bfd_link_hash_defined
3001 && h->root.type != bfd_link_hash_defweak)
3002 /* This appears to be a reference to an undefined
3003 symbol. Just ignore it--it will be caught by the
3004 regular reloc processing. */
3005 continue;
3006
3007 symval = (h->root.u.def.value
3008 + h->root.u.def.section->output_section->vma
3009 + h->root.u.def.section->output_offset);
3010 #ifdef DEBUG_RELAX
3011 fprintf (stderr,
3012 "relax longjump defined: sec: %s, name: %s, value: %x + %x + %x addend %x\n",
3013 sec->name, h->root.root.string, h->root.u.def.value,
3014 sec->output_section->vma, sec->output_offset, irel->r_addend);
3015 #endif
3016 }
3017
3018 addend = irel->r_addend;
3019
3020 foff = (symval + addend
3021 - (irel->r_offset
3022 + sec->output_section->vma
3023 + sec->output_offset
3024 + 4));
3025 #ifdef DEBUG_RELAX
3026 fprintf (stderr, "relax longjump r_offset 0x%x ptr 0x%x symbol 0x%x addend 0x%x distance 0x%x\n",
3027 irel->r_offset,
3028 (irel->r_offset
3029 + sec->output_section->vma
3030 + sec->output_offset),
3031 symval, addend, foff);
3032 #endif
3033 if (foff < -0x100000 || foff >= 0x100000)
3034 /* After all that work, we can't shorten this function call. */
3035 continue;
3036
3037 /* For simplicity of coding, we are going to modify the section
3038 contents, the section relocs, and the BFD symbol table. We
3039 must tell the rest of the code not to free up this
3040 information. It would be possible to instead create a table
3041 of changes which have to be made, as is done in coff-mips.c;
3042 that would be more work, but would require less memory when
3043 the linker is run. */
3044 elf_section_data (sec)->relocs = internal_relocs;
3045 elf_section_data (sec)->this_hdr.contents = contents;
3046 symtab_hdr->contents = (bfd_byte *) isymbuf;
3047
3048 if (foff < -0x100 || foff >= 0x100)
3049 {
3050 /* Replace the long jump with a jr. */
3051
3052 irel->r_info =
3053 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_V850_22_PCREL);
3054
3055 irel->r_addend = addend;
3056 addend = 0;
3057
3058 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
3059 /* If this needs to be changed because of future relaxing,
3060 it will be handled here like other internal IND12W
3061 relocs. */
3062 bfd_put_32 (abfd,
3063 0x00000780 | ((addend << 15) & 0xffff0000) | ((addend >> 17) & 0xf),
3064 contents + irel->r_offset);
3065 else
3066 /* We can't fully resolve this yet, because the external
3067 symbol value may be changed by future relaxing.
3068 We let the final link phase handle it. */
3069 bfd_put_32 (abfd, 0x00000780, contents + irel->r_offset);
3070
3071 hi_irelfn->r_info =
3072 ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_NONE);
3073 lo_irelfn->r_info =
3074 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_V850_NONE);
3075 if (!v850_elf_relax_delete_bytes (abfd, sec,
3076 irel->r_offset + 4, toaddr, 6))
3077 goto error_return;
3078
3079 align_pad_size += 6;
3080 }
3081 else
3082 {
3083 /* Replace the long jump with a br. */
3084
3085 irel->r_info =
3086 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_V850_9_PCREL);
3087
3088 irel->r_addend = addend;
3089 addend = 0;
3090
3091 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
3092 /* If this needs to be changed because of future relaxing,
3093 it will be handled here like other internal IND12W
3094 relocs. */
3095 bfd_put_16 (abfd,
3096 0x0585 | ((addend << 10) & 0xf800) | ((addend << 3) & 0x0070),
3097 contents + irel->r_offset);
3098 else
3099 /* We can't fully resolve this yet, because the external
3100 symbol value may be changed by future relaxing.
3101 We let the final link phase handle it. */
3102 bfd_put_16 (abfd, 0x0585, contents + irel->r_offset);
3103
3104 hi_irelfn->r_info =
3105 ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_NONE);
3106 lo_irelfn->r_info =
3107 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_V850_NONE);
3108 if (!v850_elf_relax_delete_bytes (abfd, sec,
3109 irel->r_offset + 2, toaddr, 8))
3110 goto error_return;
3111
3112 align_pad_size += 8;
3113 }
3114 }
3115 }
3116
3117 irelalign = NULL;
3118 for (irel = internal_relocs; irel < irelend; irel++)
3119 {
3120 if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_ALIGN
3121 && irel->r_offset == toaddr)
3122 {
3123 irel->r_offset -= align_pad_size;
3124
3125 if (irelalign == NULL || irelalign->r_addend > irel->r_addend)
3126 irelalign = irel;
3127 }
3128 }
3129
3130 addr = toaddr;
3131 }
3132
3133 if (!irelalign)
3134 {
3135 #ifdef DEBUG_RELAX
3136 fprintf (stderr, "relax pad %d shorten %d -> %d\n",
3137 align_pad_size,
3138 sec->_cooked_size,
3139 sec->_cooked_size - align_pad_size);
3140 #endif
3141 sec->_cooked_size -= align_pad_size;
3142 }
3143
3144 finish:
3145 if (internal_relocs != NULL
3146 && elf_section_data (sec)->relocs != internal_relocs)
3147 free (internal_relocs);
3148
3149 if (contents != NULL
3150 && elf_section_data (sec)->this_hdr.contents != (unsigned char *) contents)
3151 free (contents);
3152
3153 if (isymbuf != NULL
3154 && symtab_hdr->contents != (bfd_byte *) isymbuf)
3155 free (isymbuf);
3156
3157 return result;
3158
3159 error_return:
3160 result = FALSE;
3161 goto finish;
3162 }
3163
3164 static struct bfd_elf_special_section const v850_elf_special_sections[]=
3165 {
3166 { ".sdata", 6, -2, SHT_PROGBITS, (SHF_ALLOC + SHF_WRITE
3167 + SHF_V850_GPREL) },
3168 { ".rosdata", 8, -2, SHT_PROGBITS, (SHF_ALLOC
3169 + SHF_V850_GPREL) },
3170 { ".sbss", 5, -2, SHT_NOBITS, (SHF_ALLOC + SHF_WRITE
3171 + SHF_V850_GPREL) },
3172 { ".scommon", 8, -2, SHT_V850_SCOMMON, (SHF_ALLOC + SHF_WRITE
3173 + SHF_V850_GPREL) },
3174 { ".tdata", 6, -2, SHT_PROGBITS, (SHF_ALLOC + SHF_WRITE
3175 + SHF_V850_EPREL) },
3176 { ".tbss", 5, -2, SHT_NOBITS, (SHF_ALLOC + SHF_WRITE
3177 + SHF_V850_EPREL) },
3178 { ".tcommon", 8, -2, SHT_V850_TCOMMON, (SHF_ALLOC + SHF_WRITE
3179 + SHF_V850_R0REL) },
3180 { ".zdata", 6, -2, SHT_PROGBITS, (SHF_ALLOC + SHF_WRITE
3181 + SHF_V850_R0REL) },
3182 { ".rozdata", 8, -2, SHT_PROGBITS, (SHF_ALLOC
3183 + SHF_V850_R0REL) },
3184 { ".zbss", 5, -2, SHT_NOBITS, (SHF_ALLOC + SHF_WRITE
3185 + SHF_V850_R0REL) },
3186 { ".zcommon", 8, -2, SHT_V850_ZCOMMON, (SHF_ALLOC + SHF_WRITE
3187 + SHF_V850_R0REL) },
3188 { ".call_table_data", 16, 0, SHT_PROGBITS, (SHF_ALLOC
3189 + SHF_WRITE) },
3190 { ".call_table_text", 16, 0, SHT_PROGBITS, (SHF_ALLOC + SHF_WRITE
3191 + SHF_EXECINSTR) },
3192 { NULL, 0, 0, 0, 0 }
3193 };
3194 \f
3195 #define TARGET_LITTLE_SYM bfd_elf32_v850_vec
3196 #define TARGET_LITTLE_NAME "elf32-v850"
3197 #define ELF_ARCH bfd_arch_v850
3198 #define ELF_MACHINE_CODE EM_V850
3199 #define ELF_MACHINE_ALT1 EM_CYGNUS_V850
3200 #define ELF_MAXPAGESIZE 0x1000
3201
3202 #define elf_info_to_howto v850_elf_info_to_howto_rela
3203 #define elf_info_to_howto_rel v850_elf_info_to_howto_rel
3204
3205 #define elf_backend_check_relocs v850_elf_check_relocs
3206 #define elf_backend_relocate_section v850_elf_relocate_section
3207 #define elf_backend_object_p v850_elf_object_p
3208 #define elf_backend_final_write_processing v850_elf_final_write_processing
3209 #define elf_backend_section_from_bfd_section v850_elf_section_from_bfd_section
3210 #define elf_backend_symbol_processing v850_elf_symbol_processing
3211 #define elf_backend_add_symbol_hook v850_elf_add_symbol_hook
3212 #define elf_backend_link_output_symbol_hook v850_elf_link_output_symbol_hook
3213 #define elf_backend_section_from_shdr v850_elf_section_from_shdr
3214 #define elf_backend_fake_sections v850_elf_fake_sections
3215 #define elf_backend_gc_mark_hook v850_elf_gc_mark_hook
3216 #define elf_backend_gc_sweep_hook v850_elf_gc_sweep_hook
3217 #define elf_backend_special_sections v850_elf_special_sections
3218
3219 #define elf_backend_can_gc_sections 1
3220 #define elf_backend_rela_normal 1
3221
3222 #define bfd_elf32_bfd_is_local_label_name v850_elf_is_local_label_name
3223 #define bfd_elf32_bfd_reloc_type_lookup v850_elf_reloc_type_lookup
3224 #define bfd_elf32_bfd_merge_private_bfd_data v850_elf_merge_private_bfd_data
3225 #define bfd_elf32_bfd_set_private_flags v850_elf_set_private_flags
3226 #define bfd_elf32_bfd_print_private_bfd_data v850_elf_print_private_bfd_data
3227 #define bfd_elf32_bfd_relax_section v850_elf_relax_section
3228
3229 #define elf_symbol_leading_char '_'
3230
3231 #include "elf32-target.h"
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