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bfd/
[deliverable/binutils-gdb.git] / bfd / elf32-v850.c
1 /* V850-specific support for 32-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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 *, Elf_Internal_Sym *,
77 const char **, flagword *, asection **, bfd_vma *));
78 static bfd_boolean v850_elf_link_output_symbol_hook
79 PARAMS ((struct bfd_link_info *, const char *, Elf_Internal_Sym *,
80 asection *, struct elf_link_hash_entry *));
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_elf_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_elf_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 bfd_size_type sz;
1338 long relocation;
1339
1340 /* If there is an output BFD,
1341 and the symbol is not a section name (which is only defined at final link time),
1342 and either we are not putting the addend into the instruction
1343 or the addend is zero, so there is nothing to add into the instruction
1344 then just fixup the address and return. */
1345 if (obfd != (bfd *) NULL
1346 && (symbol->flags & BSF_SECTION_SYM) == 0
1347 && (! reloc->howto->partial_inplace
1348 || reloc->addend == 0))
1349 {
1350 reloc->address += isection->output_offset;
1351 return bfd_reloc_ok;
1352 }
1353
1354 /* Catch relocs involving undefined symbols. */
1355 if (bfd_is_und_section (symbol->section)
1356 && (symbol->flags & BSF_WEAK) == 0
1357 && obfd == NULL)
1358 return bfd_reloc_undefined;
1359
1360 /* We handle final linking of some relocs ourselves. */
1361
1362 /* Is the address of the relocation really within the section? */
1363 sz = isection->rawsize ? isection->rawsize : isection->size;
1364 if (reloc->address > sz)
1365 return bfd_reloc_outofrange;
1366
1367 /* Work out which section the relocation is targeted at and the
1368 initial relocation command value. */
1369
1370 if (reloc->howto->pc_relative)
1371 return bfd_reloc_ok;
1372
1373 /* Get symbol value. (Common symbols are special.) */
1374 if (bfd_is_com_section (symbol->section))
1375 relocation = 0;
1376 else
1377 relocation = symbol->value;
1378
1379 /* Convert input-section-relative symbol value to absolute + addend. */
1380 relocation += symbol->section->output_section->vma;
1381 relocation += symbol->section->output_offset;
1382 relocation += reloc->addend;
1383
1384 #if 0 /* Since this reloc is going to be processed later on, we should
1385 not make it pc-relative here. To test this, try assembling and
1386 linking this program:
1387
1388 .text
1389 .globl _start
1390 nop
1391 _start:
1392 jr foo
1393
1394 .section ".foo","ax"
1395 nop
1396 foo:
1397 nop */
1398 if (reloc->howto->pc_relative)
1399 {
1400 /* Here the variable relocation holds the final address of the
1401 symbol we are relocating against, plus any addend. */
1402 relocation -= isection->output_section->vma + isection->output_offset;
1403
1404 /* Deal with pcrel_offset. */
1405 relocation -= reloc->address;
1406 }
1407 #endif
1408 reloc->addend = relocation;
1409 return bfd_reloc_ok;
1410 }
1411
1412 /* This function is used for relocs which are only used
1413 for relaxing, which the linker should otherwise ignore. */
1414
1415 static bfd_reloc_status_type
1416 v850_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section,
1417 output_bfd, error_message)
1418 bfd *abfd ATTRIBUTE_UNUSED;
1419 arelent *reloc_entry;
1420 asymbol *symbol ATTRIBUTE_UNUSED;
1421 PTR data ATTRIBUTE_UNUSED;
1422 asection *input_section;
1423 bfd *output_bfd;
1424 char **error_message ATTRIBUTE_UNUSED;
1425 {
1426 if (output_bfd != NULL)
1427 reloc_entry->address += input_section->output_offset;
1428
1429 return bfd_reloc_ok;
1430 }
1431 \f
1432 static bfd_boolean
1433 v850_elf_is_local_label_name (abfd, name)
1434 bfd *abfd ATTRIBUTE_UNUSED;
1435 const char *name;
1436 {
1437 return ( (name[0] == '.' && (name[1] == 'L' || name[1] == '.'))
1438 || (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_'));
1439 }
1440 \f
1441 /* We overload some of the bfd_reloc error codes for own purposes. */
1442 #define bfd_reloc_gp_not_found bfd_reloc_other
1443 #define bfd_reloc_ep_not_found bfd_reloc_continue
1444 #define bfd_reloc_ctbp_not_found (bfd_reloc_dangerous + 1)
1445
1446 /* Perform a relocation as part of a final link. */
1447
1448 static bfd_reloc_status_type
1449 v850_elf_final_link_relocate (howto, input_bfd, output_bfd,
1450 input_section, contents, offset, value,
1451 addend, info, sym_sec, is_local)
1452 reloc_howto_type *howto;
1453 bfd *input_bfd;
1454 bfd *output_bfd ATTRIBUTE_UNUSED;
1455 asection *input_section;
1456 bfd_byte *contents;
1457 bfd_vma offset;
1458 bfd_vma value;
1459 bfd_vma addend;
1460 struct bfd_link_info *info;
1461 asection *sym_sec;
1462 int is_local ATTRIBUTE_UNUSED;
1463 {
1464 unsigned int r_type = howto->type;
1465 bfd_byte *hit_data = contents + offset;
1466
1467 /* Adjust the value according to the relocation. */
1468 switch (r_type)
1469 {
1470 case R_V850_9_PCREL:
1471 value -= (input_section->output_section->vma
1472 + input_section->output_offset);
1473 value -= offset;
1474 break;
1475
1476 case R_V850_22_PCREL:
1477 value -= (input_section->output_section->vma
1478 + input_section->output_offset
1479 + offset);
1480
1481 /* If the sign extension will corrupt the value then we have overflowed. */
1482 if (((value & 0xff000000) != 0x0) && ((value & 0xff000000) != 0xff000000))
1483 return bfd_reloc_overflow;
1484
1485 /* Only the bottom 24 bits of the PC are valid */
1486 value = SEXT24 (value);
1487 break;
1488
1489 case R_V850_REL32:
1490 value -= (input_section->output_section->vma
1491 + input_section->output_offset
1492 + offset);
1493 break;
1494
1495 case R_V850_HI16_S:
1496 case R_V850_HI16:
1497 case R_V850_LO16:
1498 case R_V850_16:
1499 case R_V850_ABS32:
1500 case R_V850_8:
1501 break;
1502
1503 case R_V850_ZDA_15_16_OFFSET:
1504 case R_V850_ZDA_16_16_OFFSET:
1505 case R_V850_ZDA_16_16_SPLIT_OFFSET:
1506 if (sym_sec == NULL)
1507 return bfd_reloc_undefined;
1508
1509 value -= sym_sec->output_section->vma;
1510 break;
1511
1512 case R_V850_SDA_15_16_OFFSET:
1513 case R_V850_SDA_16_16_OFFSET:
1514 case R_V850_SDA_16_16_SPLIT_OFFSET:
1515 {
1516 unsigned long gp;
1517 struct bfd_link_hash_entry * h;
1518
1519 if (sym_sec == NULL)
1520 return bfd_reloc_undefined;
1521
1522 /* Get the value of __gp. */
1523 h = bfd_link_hash_lookup (info->hash, "__gp", FALSE, FALSE, TRUE);
1524 if (h == (struct bfd_link_hash_entry *) NULL
1525 || h->type != bfd_link_hash_defined)
1526 return bfd_reloc_gp_not_found;
1527
1528 gp = (h->u.def.value
1529 + h->u.def.section->output_section->vma
1530 + h->u.def.section->output_offset);
1531
1532 value -= sym_sec->output_section->vma;
1533 value -= (gp - sym_sec->output_section->vma);
1534 }
1535 break;
1536
1537 case R_V850_TDA_4_4_OFFSET:
1538 case R_V850_TDA_4_5_OFFSET:
1539 case R_V850_TDA_16_16_OFFSET:
1540 case R_V850_TDA_7_7_OFFSET:
1541 case R_V850_TDA_7_8_OFFSET:
1542 case R_V850_TDA_6_8_OFFSET:
1543 {
1544 unsigned long ep;
1545 struct bfd_link_hash_entry * h;
1546
1547 /* Get the value of __ep. */
1548 h = bfd_link_hash_lookup (info->hash, "__ep", FALSE, FALSE, TRUE);
1549 if (h == (struct bfd_link_hash_entry *) NULL
1550 || h->type != bfd_link_hash_defined)
1551 return bfd_reloc_ep_not_found;
1552
1553 ep = (h->u.def.value
1554 + h->u.def.section->output_section->vma
1555 + h->u.def.section->output_offset);
1556
1557 value -= ep;
1558 }
1559 break;
1560
1561 case R_V850_CALLT_6_7_OFFSET:
1562 {
1563 unsigned long ctbp;
1564 struct bfd_link_hash_entry * h;
1565
1566 /* Get the value of __ctbp. */
1567 h = bfd_link_hash_lookup (info->hash, "__ctbp", FALSE, FALSE, TRUE);
1568 if (h == (struct bfd_link_hash_entry *) NULL
1569 || h->type != bfd_link_hash_defined)
1570 return bfd_reloc_ctbp_not_found;
1571
1572 ctbp = (h->u.def.value
1573 + h->u.def.section->output_section->vma
1574 + h->u.def.section->output_offset);
1575 value -= ctbp;
1576 }
1577 break;
1578
1579 case R_V850_CALLT_16_16_OFFSET:
1580 {
1581 unsigned long ctbp;
1582 struct bfd_link_hash_entry * h;
1583
1584 if (sym_sec == NULL)
1585 return bfd_reloc_undefined;
1586
1587 /* Get the value of __ctbp. */
1588 h = bfd_link_hash_lookup (info->hash, "__ctbp", FALSE, FALSE, TRUE);
1589 if (h == (struct bfd_link_hash_entry *) NULL
1590 || h->type != bfd_link_hash_defined)
1591 return bfd_reloc_ctbp_not_found;
1592
1593 ctbp = (h->u.def.value
1594 + h->u.def.section->output_section->vma
1595 + h->u.def.section->output_offset);
1596
1597 value -= sym_sec->output_section->vma;
1598 value -= (ctbp - sym_sec->output_section->vma);
1599 }
1600 break;
1601
1602 case R_V850_NONE:
1603 case R_V850_GNU_VTINHERIT:
1604 case R_V850_GNU_VTENTRY:
1605 case R_V850_LONGCALL:
1606 case R_V850_LONGJUMP:
1607 case R_V850_ALIGN:
1608 return bfd_reloc_ok;
1609
1610 default:
1611 return bfd_reloc_notsupported;
1612 }
1613
1614 /* Perform the relocation. */
1615 return v850_elf_perform_relocation (input_bfd, r_type, value + addend, hit_data);
1616 }
1617 \f
1618 /* Relocate an V850 ELF section. */
1619
1620 static bfd_boolean
1621 v850_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1622 contents, relocs, local_syms, local_sections)
1623 bfd *output_bfd;
1624 struct bfd_link_info *info;
1625 bfd *input_bfd;
1626 asection *input_section;
1627 bfd_byte *contents;
1628 Elf_Internal_Rela *relocs;
1629 Elf_Internal_Sym *local_syms;
1630 asection **local_sections;
1631 {
1632 Elf_Internal_Shdr *symtab_hdr;
1633 struct elf_link_hash_entry **sym_hashes;
1634 Elf_Internal_Rela *rel;
1635 Elf_Internal_Rela *relend;
1636
1637 if (info->relocatable)
1638 return TRUE;
1639
1640 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1641 sym_hashes = elf_sym_hashes (input_bfd);
1642
1643 if (sym_hashes == NULL)
1644 {
1645 info->callbacks->warning
1646 (info, "no hash table available",
1647 NULL, input_bfd, input_section, (bfd_vma) 0);
1648
1649 return FALSE;
1650 }
1651
1652 /* Reset the list of remembered HI16S relocs to empty. */
1653 free_hi16s = previous_hi16s;
1654 previous_hi16s = NULL;
1655 hi16s_counter = 0;
1656
1657 rel = relocs;
1658 relend = relocs + input_section->reloc_count;
1659 for (; rel < relend; rel++)
1660 {
1661 int r_type;
1662 reloc_howto_type *howto;
1663 unsigned long r_symndx;
1664 Elf_Internal_Sym *sym;
1665 asection *sec;
1666 struct elf_link_hash_entry *h;
1667 bfd_vma relocation;
1668 bfd_reloc_status_type r;
1669
1670 r_symndx = ELF32_R_SYM (rel->r_info);
1671 r_type = ELF32_R_TYPE (rel->r_info);
1672
1673 if (r_type == R_V850_GNU_VTENTRY
1674 || r_type == R_V850_GNU_VTINHERIT)
1675 continue;
1676
1677 /* This is a final link. */
1678 howto = v850_elf_howto_table + r_type;
1679 h = NULL;
1680 sym = NULL;
1681 sec = NULL;
1682 if (r_symndx < symtab_hdr->sh_info)
1683 {
1684 sym = local_syms + r_symndx;
1685 sec = local_sections[r_symndx];
1686 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1687 #if 0
1688 {
1689 char * name;
1690
1691 name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, sym->st_name);
1692 name = (name == NULL) ? "<none>" : name;
1693 fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
1694 sec->name, name, sym->st_name,
1695 sec->output_section->vma, sec->output_offset, sym->st_value, rel->r_addend);
1696 }
1697 #endif
1698 }
1699 else
1700 {
1701 bfd_boolean unresolved_reloc, warned;
1702
1703 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1704 r_symndx, symtab_hdr, sym_hashes,
1705 h, sec, relocation,
1706 unresolved_reloc, warned);
1707 }
1708
1709 /* FIXME: We should use the addend, but the COFF relocations don't. */
1710 r = v850_elf_final_link_relocate (howto, input_bfd, output_bfd,
1711 input_section,
1712 contents, rel->r_offset,
1713 relocation, rel->r_addend,
1714 info, sec, h == NULL);
1715
1716 if (r != bfd_reloc_ok)
1717 {
1718 const char * name;
1719 const char * msg = (const char *)0;
1720
1721 if (h != NULL)
1722 name = h->root.root.string;
1723 else
1724 {
1725 name = (bfd_elf_string_from_elf_section
1726 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1727 if (name == NULL || *name == '\0')
1728 name = bfd_section_name (input_bfd, sec);
1729 }
1730
1731 switch (r)
1732 {
1733 case bfd_reloc_overflow:
1734 if (! ((*info->callbacks->reloc_overflow)
1735 (info, name, howto->name, (bfd_vma) 0,
1736 input_bfd, input_section, rel->r_offset)))
1737 return FALSE;
1738 break;
1739
1740 case bfd_reloc_undefined:
1741 if (! ((*info->callbacks->undefined_symbol)
1742 (info, name, input_bfd, input_section,
1743 rel->r_offset, TRUE)))
1744 return FALSE;
1745 break;
1746
1747 case bfd_reloc_outofrange:
1748 msg = _("internal error: out of range error");
1749 goto common_error;
1750
1751 case bfd_reloc_notsupported:
1752 msg = _("internal error: unsupported relocation error");
1753 goto common_error;
1754
1755 case bfd_reloc_dangerous:
1756 msg = _("internal error: dangerous relocation");
1757 goto common_error;
1758
1759 case bfd_reloc_gp_not_found:
1760 msg = _("could not locate special linker symbol __gp");
1761 goto common_error;
1762
1763 case bfd_reloc_ep_not_found:
1764 msg = _("could not locate special linker symbol __ep");
1765 goto common_error;
1766
1767 case bfd_reloc_ctbp_not_found:
1768 msg = _("could not locate special linker symbol __ctbp");
1769 goto common_error;
1770
1771 default:
1772 msg = _("internal error: unknown error");
1773 /* fall through */
1774
1775 common_error:
1776 if (!((*info->callbacks->warning)
1777 (info, msg, name, input_bfd, input_section,
1778 rel->r_offset)))
1779 return FALSE;
1780 break;
1781 }
1782 }
1783 }
1784
1785 return TRUE;
1786 }
1787
1788 static bfd_boolean
1789 v850_elf_gc_sweep_hook (abfd, info, sec, relocs)
1790 bfd *abfd ATTRIBUTE_UNUSED;
1791 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1792 asection *sec ATTRIBUTE_UNUSED;
1793 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
1794 {
1795 /* No got and plt entries for v850-elf. */
1796 return TRUE;
1797 }
1798
1799 static asection *
1800 v850_elf_gc_mark_hook (sec, info, rel, h, sym)
1801 asection *sec;
1802 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1803 Elf_Internal_Rela *rel;
1804 struct elf_link_hash_entry *h;
1805 Elf_Internal_Sym *sym;
1806 {
1807 if (h != NULL)
1808 {
1809 switch (ELF32_R_TYPE (rel->r_info))
1810 {
1811 case R_V850_GNU_VTINHERIT:
1812 case R_V850_GNU_VTENTRY:
1813 break;
1814
1815 default:
1816 switch (h->root.type)
1817 {
1818 case bfd_link_hash_defined:
1819 case bfd_link_hash_defweak:
1820 return h->root.u.def.section;
1821
1822 case bfd_link_hash_common:
1823 return h->root.u.c.p->section;
1824
1825 default:
1826 break;
1827 }
1828 }
1829 }
1830 else
1831 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1832
1833 return NULL;
1834 }
1835
1836 /* Set the right machine number. */
1837
1838 static bfd_boolean
1839 v850_elf_object_p (abfd)
1840 bfd *abfd;
1841 {
1842 switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH)
1843 {
1844 default:
1845 case E_V850_ARCH:
1846 bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850);
1847 break;
1848 case E_V850E_ARCH:
1849 bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850e);
1850 break;
1851 case E_V850E1_ARCH:
1852 bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850e1);
1853 break;
1854 }
1855 return TRUE;
1856 }
1857
1858 /* Store the machine number in the flags field. */
1859
1860 static void
1861 v850_elf_final_write_processing (abfd, linker)
1862 bfd *abfd;
1863 bfd_boolean linker ATTRIBUTE_UNUSED;
1864 {
1865 unsigned long val;
1866
1867 switch (bfd_get_mach (abfd))
1868 {
1869 default:
1870 case bfd_mach_v850: val = E_V850_ARCH; break;
1871 case bfd_mach_v850e: val = E_V850E_ARCH; break;
1872 case bfd_mach_v850e1: val = E_V850E1_ARCH; break;
1873 }
1874
1875 elf_elfheader (abfd)->e_flags &=~ EF_V850_ARCH;
1876 elf_elfheader (abfd)->e_flags |= val;
1877 }
1878
1879 /* Function to keep V850 specific file flags. */
1880
1881 static bfd_boolean
1882 v850_elf_set_private_flags (abfd, flags)
1883 bfd *abfd;
1884 flagword flags;
1885 {
1886 BFD_ASSERT (!elf_flags_init (abfd)
1887 || elf_elfheader (abfd)->e_flags == flags);
1888
1889 elf_elfheader (abfd)->e_flags = flags;
1890 elf_flags_init (abfd) = TRUE;
1891 return TRUE;
1892 }
1893
1894 /* Merge backend specific data from an object file
1895 to the output object file when linking. */
1896 static bfd_boolean
1897 v850_elf_merge_private_bfd_data (ibfd, obfd)
1898 bfd *ibfd;
1899 bfd *obfd;
1900 {
1901 flagword out_flags;
1902 flagword in_flags;
1903
1904 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1905 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1906 return TRUE;
1907
1908 in_flags = elf_elfheader (ibfd)->e_flags;
1909 out_flags = elf_elfheader (obfd)->e_flags;
1910
1911 if (! elf_flags_init (obfd))
1912 {
1913 /* If the input is the default architecture then do not
1914 bother setting the flags for the output architecture,
1915 instead allow future merges to do this. If no future
1916 merges ever set these flags then they will retain their
1917 unitialised values, which surprise surprise, correspond
1918 to the default values. */
1919 if (bfd_get_arch_info (ibfd)->the_default)
1920 return TRUE;
1921
1922 elf_flags_init (obfd) = TRUE;
1923 elf_elfheader (obfd)->e_flags = in_flags;
1924
1925 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
1926 && bfd_get_arch_info (obfd)->the_default)
1927 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
1928
1929 return TRUE;
1930 }
1931
1932 /* Check flag compatibility. */
1933 if (in_flags == out_flags)
1934 return TRUE;
1935
1936 if ((in_flags & EF_V850_ARCH) != (out_flags & EF_V850_ARCH)
1937 && (in_flags & EF_V850_ARCH) != E_V850_ARCH)
1938 {
1939 /* Allow v850e1 binaries to be linked with v850e binaries.
1940 Set the output binary to v850e. */
1941 if ((in_flags & EF_V850_ARCH) == E_V850E1_ARCH
1942 && (out_flags & EF_V850_ARCH) == E_V850E_ARCH)
1943 return TRUE;
1944
1945 if ((in_flags & EF_V850_ARCH) == E_V850E_ARCH
1946 && (out_flags & EF_V850_ARCH) == E_V850E1_ARCH)
1947 {
1948 elf_elfheader (obfd)->e_flags =
1949 ((out_flags & ~ EF_V850_ARCH) | E_V850E_ARCH);
1950 return TRUE;
1951 }
1952
1953 _bfd_error_handler (_("%s: Architecture mismatch with previous modules"),
1954 bfd_archive_filename (ibfd));
1955 }
1956
1957 return TRUE;
1958 }
1959
1960 /* Display the flags field. */
1961
1962 static bfd_boolean
1963 v850_elf_print_private_bfd_data (abfd, ptr)
1964 bfd *abfd;
1965 PTR ptr;
1966 {
1967 FILE * file = (FILE *) ptr;
1968
1969 BFD_ASSERT (abfd != NULL && ptr != NULL);
1970
1971 _bfd_elf_print_private_bfd_data (abfd, ptr);
1972
1973 /* xgettext:c-format */
1974 fprintf (file, _("private flags = %lx: "), elf_elfheader (abfd)->e_flags);
1975
1976 switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH)
1977 {
1978 default:
1979 case E_V850_ARCH: fprintf (file, _("v850 architecture")); break;
1980 case E_V850E_ARCH: fprintf (file, _("v850e architecture")); break;
1981 case E_V850E1_ARCH: fprintf (file, _("v850e1 architecture")); break;
1982 }
1983
1984 fputc ('\n', file);
1985
1986 return TRUE;
1987 }
1988
1989 /* V850 ELF uses four common sections. One is the usual one, and the
1990 others are for (small) objects in one of the special data areas:
1991 small, tiny and zero. All the objects are kept together, and then
1992 referenced via the gp register, the ep register or the r0 register
1993 respectively, which yields smaller, faster assembler code. This
1994 approach is copied from elf32-mips.c. */
1995
1996 static asection v850_elf_scom_section;
1997 static asymbol v850_elf_scom_symbol;
1998 static asymbol * v850_elf_scom_symbol_ptr;
1999 static asection v850_elf_tcom_section;
2000 static asymbol v850_elf_tcom_symbol;
2001 static asymbol * v850_elf_tcom_symbol_ptr;
2002 static asection v850_elf_zcom_section;
2003 static asymbol v850_elf_zcom_symbol;
2004 static asymbol * v850_elf_zcom_symbol_ptr;
2005
2006 /* Given a BFD section, try to locate the
2007 corresponding ELF section index. */
2008
2009 static bfd_boolean
2010 v850_elf_section_from_bfd_section (abfd, sec, retval)
2011 bfd *abfd ATTRIBUTE_UNUSED;
2012 asection *sec;
2013 int *retval;
2014 {
2015 if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0)
2016 *retval = SHN_V850_SCOMMON;
2017 else if (strcmp (bfd_get_section_name (abfd, sec), ".tcommon") == 0)
2018 *retval = SHN_V850_TCOMMON;
2019 else if (strcmp (bfd_get_section_name (abfd, sec), ".zcommon") == 0)
2020 *retval = SHN_V850_ZCOMMON;
2021 else
2022 return FALSE;
2023
2024 return TRUE;
2025 }
2026
2027 /* Handle the special V850 section numbers that a symbol may use. */
2028
2029 static void
2030 v850_elf_symbol_processing (abfd, asym)
2031 bfd *abfd;
2032 asymbol *asym;
2033 {
2034 elf_symbol_type * elfsym = (elf_symbol_type *) asym;
2035 unsigned int indx;
2036
2037 indx = elfsym->internal_elf_sym.st_shndx;
2038
2039 /* If the section index is an "ordinary" index, then it may
2040 refer to a v850 specific section created by the assembler.
2041 Check the section's type and change the index it matches.
2042
2043 FIXME: Should we alter the st_shndx field as well ? */
2044
2045 if (indx < elf_numsections (abfd))
2046 switch (elf_elfsections(abfd)[indx]->sh_type)
2047 {
2048 case SHT_V850_SCOMMON:
2049 indx = SHN_V850_SCOMMON;
2050 break;
2051
2052 case SHT_V850_TCOMMON:
2053 indx = SHN_V850_TCOMMON;
2054 break;
2055
2056 case SHT_V850_ZCOMMON:
2057 indx = SHN_V850_ZCOMMON;
2058 break;
2059
2060 default:
2061 break;
2062 }
2063
2064 switch (indx)
2065 {
2066 case SHN_V850_SCOMMON:
2067 if (v850_elf_scom_section.name == NULL)
2068 {
2069 /* Initialize the small common section. */
2070 v850_elf_scom_section.name = ".scommon";
2071 v850_elf_scom_section.flags = SEC_IS_COMMON | SEC_ALLOC | SEC_DATA;
2072 v850_elf_scom_section.output_section = & v850_elf_scom_section;
2073 v850_elf_scom_section.symbol = & v850_elf_scom_symbol;
2074 v850_elf_scom_section.symbol_ptr_ptr = & v850_elf_scom_symbol_ptr;
2075 v850_elf_scom_symbol.name = ".scommon";
2076 v850_elf_scom_symbol.flags = BSF_SECTION_SYM;
2077 v850_elf_scom_symbol.section = & v850_elf_scom_section;
2078 v850_elf_scom_symbol_ptr = & v850_elf_scom_symbol;
2079 }
2080 asym->section = & v850_elf_scom_section;
2081 asym->value = elfsym->internal_elf_sym.st_size;
2082 break;
2083
2084 case SHN_V850_TCOMMON:
2085 if (v850_elf_tcom_section.name == NULL)
2086 {
2087 /* Initialize the tcommon section. */
2088 v850_elf_tcom_section.name = ".tcommon";
2089 v850_elf_tcom_section.flags = SEC_IS_COMMON;
2090 v850_elf_tcom_section.output_section = & v850_elf_tcom_section;
2091 v850_elf_tcom_section.symbol = & v850_elf_tcom_symbol;
2092 v850_elf_tcom_section.symbol_ptr_ptr = & v850_elf_tcom_symbol_ptr;
2093 v850_elf_tcom_symbol.name = ".tcommon";
2094 v850_elf_tcom_symbol.flags = BSF_SECTION_SYM;
2095 v850_elf_tcom_symbol.section = & v850_elf_tcom_section;
2096 v850_elf_tcom_symbol_ptr = & v850_elf_tcom_symbol;
2097 }
2098 asym->section = & v850_elf_tcom_section;
2099 asym->value = elfsym->internal_elf_sym.st_size;
2100 break;
2101
2102 case SHN_V850_ZCOMMON:
2103 if (v850_elf_zcom_section.name == NULL)
2104 {
2105 /* Initialize the zcommon section. */
2106 v850_elf_zcom_section.name = ".zcommon";
2107 v850_elf_zcom_section.flags = SEC_IS_COMMON;
2108 v850_elf_zcom_section.output_section = & v850_elf_zcom_section;
2109 v850_elf_zcom_section.symbol = & v850_elf_zcom_symbol;
2110 v850_elf_zcom_section.symbol_ptr_ptr = & v850_elf_zcom_symbol_ptr;
2111 v850_elf_zcom_symbol.name = ".zcommon";
2112 v850_elf_zcom_symbol.flags = BSF_SECTION_SYM;
2113 v850_elf_zcom_symbol.section = & v850_elf_zcom_section;
2114 v850_elf_zcom_symbol_ptr = & v850_elf_zcom_symbol;
2115 }
2116 asym->section = & v850_elf_zcom_section;
2117 asym->value = elfsym->internal_elf_sym.st_size;
2118 break;
2119 }
2120 }
2121
2122 /* Hook called by the linker routine which adds symbols from an object
2123 file. We must handle the special v850 section numbers here. */
2124
2125 static bfd_boolean
2126 v850_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
2127 bfd *abfd;
2128 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2129 Elf_Internal_Sym *sym;
2130 const char **namep ATTRIBUTE_UNUSED;
2131 flagword *flagsp ATTRIBUTE_UNUSED;
2132 asection **secp;
2133 bfd_vma *valp;
2134 {
2135 unsigned int indx = sym->st_shndx;
2136
2137 /* If the section index is an "ordinary" index, then it may
2138 refer to a v850 specific section created by the assembler.
2139 Check the section's type and change the index it matches.
2140
2141 FIXME: Should we alter the st_shndx field as well ? */
2142
2143 if (indx < elf_numsections (abfd))
2144 switch (elf_elfsections(abfd)[indx]->sh_type)
2145 {
2146 case SHT_V850_SCOMMON:
2147 indx = SHN_V850_SCOMMON;
2148 break;
2149
2150 case SHT_V850_TCOMMON:
2151 indx = SHN_V850_TCOMMON;
2152 break;
2153
2154 case SHT_V850_ZCOMMON:
2155 indx = SHN_V850_ZCOMMON;
2156 break;
2157
2158 default:
2159 break;
2160 }
2161
2162 switch (indx)
2163 {
2164 case SHN_V850_SCOMMON:
2165 *secp = bfd_make_section_old_way (abfd, ".scommon");
2166 (*secp)->flags |= SEC_IS_COMMON;
2167 *valp = sym->st_size;
2168 break;
2169
2170 case SHN_V850_TCOMMON:
2171 *secp = bfd_make_section_old_way (abfd, ".tcommon");
2172 (*secp)->flags |= SEC_IS_COMMON;
2173 *valp = sym->st_size;
2174 break;
2175
2176 case SHN_V850_ZCOMMON:
2177 *secp = bfd_make_section_old_way (abfd, ".zcommon");
2178 (*secp)->flags |= SEC_IS_COMMON;
2179 *valp = sym->st_size;
2180 break;
2181 }
2182
2183 return TRUE;
2184 }
2185
2186 static bfd_boolean
2187 v850_elf_link_output_symbol_hook (info, name, sym, input_sec, h)
2188 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2189 const char *name ATTRIBUTE_UNUSED;
2190 Elf_Internal_Sym *sym;
2191 asection *input_sec;
2192 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED;
2193 {
2194 /* If we see a common symbol, which implies a relocatable link, then
2195 if a symbol was in a special common section in an input file, mark
2196 it as a special common in the output file. */
2197
2198 if (sym->st_shndx == SHN_COMMON)
2199 {
2200 if (strcmp (input_sec->name, ".scommon") == 0)
2201 sym->st_shndx = SHN_V850_SCOMMON;
2202 else if (strcmp (input_sec->name, ".tcommon") == 0)
2203 sym->st_shndx = SHN_V850_TCOMMON;
2204 else if (strcmp (input_sec->name, ".zcommon") == 0)
2205 sym->st_shndx = SHN_V850_ZCOMMON;
2206 }
2207
2208 return TRUE;
2209 }
2210
2211 static bfd_boolean
2212 v850_elf_section_from_shdr (abfd, hdr, name)
2213 bfd *abfd;
2214 Elf_Internal_Shdr *hdr;
2215 const char *name;
2216 {
2217 /* There ought to be a place to keep ELF backend specific flags, but
2218 at the moment there isn't one. We just keep track of the
2219 sections by their name, instead. */
2220
2221 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2222 return FALSE;
2223
2224 switch (hdr->sh_type)
2225 {
2226 case SHT_V850_SCOMMON:
2227 case SHT_V850_TCOMMON:
2228 case SHT_V850_ZCOMMON:
2229 if (! bfd_set_section_flags (abfd, hdr->bfd_section,
2230 (bfd_get_section_flags (abfd,
2231 hdr->bfd_section)
2232 | SEC_IS_COMMON)))
2233 return FALSE;
2234 }
2235
2236 return TRUE;
2237 }
2238
2239 /* Set the correct type for a V850 ELF section. We do this
2240 by the section name, which is a hack, but ought to work. */
2241
2242 static bfd_boolean
2243 v850_elf_fake_sections (abfd, hdr, sec)
2244 bfd *abfd ATTRIBUTE_UNUSED;
2245 Elf_Internal_Shdr *hdr;
2246 asection *sec;
2247 {
2248 register const char * name;
2249
2250 name = bfd_get_section_name (abfd, sec);
2251
2252 if (strcmp (name, ".scommon") == 0)
2253 {
2254 hdr->sh_type = SHT_V850_SCOMMON;
2255 }
2256 else if (strcmp (name, ".tcommon") == 0)
2257 {
2258 hdr->sh_type = SHT_V850_TCOMMON;
2259 }
2260 else if (strcmp (name, ".zcommon") == 0)
2261 hdr->sh_type = SHT_V850_ZCOMMON;
2262
2263 return TRUE;
2264 }
2265
2266 /* Delete some bytes from a section while relaxing. */
2267
2268 static bfd_boolean
2269 v850_elf_relax_delete_bytes (abfd, sec, addr, toaddr, count)
2270 bfd *abfd;
2271 asection *sec;
2272 bfd_vma addr;
2273 bfd_vma toaddr;
2274 int count;
2275 {
2276 Elf_Internal_Shdr *symtab_hdr;
2277 Elf32_External_Sym *extsyms;
2278 Elf32_External_Sym *esym;
2279 Elf32_External_Sym *esymend;
2280 int index;
2281 unsigned int sec_shndx;
2282 bfd_byte *contents;
2283 Elf_Internal_Rela *irel;
2284 Elf_Internal_Rela *irelend;
2285 struct elf_link_hash_entry *sym_hash;
2286 Elf_Internal_Shdr *shndx_hdr;
2287 Elf_External_Sym_Shndx *shndx;
2288
2289 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2290 extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
2291
2292 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
2293
2294 contents = elf_section_data (sec)->this_hdr.contents;
2295
2296 /* The deletion must stop at the next ALIGN reloc for an alignment
2297 power larger than the number of bytes we are deleting. */
2298
2299 /* Actually delete the bytes. */
2300 #if (DEBUG_RELAX & 2)
2301 fprintf (stderr, "relax_delete: contents: sec: %s %p .. %p %x\n",
2302 sec->name, addr, toaddr, count );
2303 #endif
2304 memmove (contents + addr, contents + addr + count,
2305 toaddr - addr - count);
2306 memset (contents + toaddr-count, 0, count);
2307
2308 /* Adjust all the relocs. */
2309 irel = elf_section_data (sec)->relocs;
2310 irelend = irel + sec->reloc_count;
2311 shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
2312 shndx = (Elf_External_Sym_Shndx *) shndx_hdr->contents;
2313
2314 for (; irel < irelend; irel++)
2315 {
2316 bfd_vma raddr, paddr, symval;
2317 Elf_Internal_Sym isym;
2318
2319 /* Get the new reloc address. */
2320 raddr = irel->r_offset;
2321 if ((raddr >= (addr + count) && raddr < toaddr))
2322 irel->r_offset -= count;
2323
2324 if (raddr >= addr && raddr < addr + count)
2325 {
2326 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2327 (int) R_V850_NONE);
2328 continue;
2329 }
2330
2331 if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_ALIGN)
2332 continue;
2333
2334 bfd_elf32_swap_symbol_in (abfd,
2335 extsyms + ELF32_R_SYM (irel->r_info),
2336 shndx ? shndx + ELF32_R_SYM (irel->r_info) : NULL,
2337 & isym);
2338
2339 if (isym.st_shndx != sec_shndx)
2340 continue;
2341
2342 /* Get the value of the symbol referred to by the reloc. */
2343 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2344 {
2345 symval = isym.st_value;
2346 #if (DEBUG_RELAX & 2)
2347 {
2348 char * name = bfd_elf_string_from_elf_section
2349 (abfd, symtab_hdr->sh_link, isym.st_name);
2350 fprintf (stderr,
2351 "relax_delete: local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
2352 sec->name, name, isym.st_name,
2353 sec->output_section->vma, sec->output_offset,
2354 isym.st_value, irel->r_addend);
2355 }
2356 #endif
2357 }
2358 else
2359 {
2360 unsigned long indx;
2361 struct elf_link_hash_entry * h;
2362
2363 /* An external symbol. */
2364 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2365
2366 h = elf_sym_hashes (abfd) [indx];
2367 BFD_ASSERT (h != NULL);
2368
2369 symval = h->root.u.def.value;
2370 #if (DEBUG_RELAX & 2)
2371 fprintf (stderr,
2372 "relax_delete: defined: sec: %s, name: %s, value: %x + %x + %x addend %x\n",
2373 sec->name, h->root.root.string, h->root.u.def.value,
2374 sec->output_section->vma, sec->output_offset, irel->r_addend);
2375 #endif
2376 }
2377
2378 paddr = symval + irel->r_addend;
2379
2380 if ( (symval >= addr + count && symval < toaddr)
2381 && (paddr < addr + count || paddr >= toaddr))
2382 irel->r_addend += count;
2383 else if ( (symval < addr + count || symval >= toaddr)
2384 && (paddr >= addr + count && paddr < toaddr))
2385 irel->r_addend -= count;
2386 }
2387
2388 /* Adjust the local symbols defined in this section. */
2389 esym = extsyms;
2390 esymend = esym + symtab_hdr->sh_info;
2391
2392 for (; esym < esymend; esym++, shndx = (shndx ? shndx + 1 : NULL))
2393 {
2394 Elf_Internal_Sym isym;
2395
2396 bfd_elf32_swap_symbol_in (abfd, esym, shndx, & isym);
2397
2398 if (isym.st_shndx == sec_shndx
2399 && isym.st_value >= addr + count
2400 && isym.st_value < toaddr)
2401 {
2402 isym.st_value -= count;
2403
2404 if (isym.st_value + isym.st_size >= toaddr)
2405 isym.st_size += count;
2406
2407 bfd_elf32_swap_symbol_out (abfd, & isym, esym, shndx);
2408 }
2409 else if (isym.st_shndx == sec_shndx
2410 && isym.st_value < addr + count)
2411 {
2412 if (isym.st_value+isym.st_size >= addr + count
2413 && isym.st_value+isym.st_size < toaddr)
2414 isym.st_size -= count;
2415
2416 if (isym.st_value >= addr
2417 && isym.st_value < addr + count)
2418 isym.st_value = addr;
2419
2420 bfd_elf32_swap_symbol_out (abfd, & isym, esym, shndx);
2421 }
2422 }
2423
2424 /* Now adjust the global symbols defined in this section. */
2425 esym = extsyms + symtab_hdr->sh_info;
2426 esymend = extsyms + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym));
2427
2428 for (index = 0; esym < esymend; esym ++, index ++)
2429 {
2430 Elf_Internal_Sym isym;
2431
2432 bfd_elf32_swap_symbol_in (abfd, esym, shndx, & isym);
2433 sym_hash = elf_sym_hashes (abfd) [index];
2434
2435 if (isym.st_shndx == sec_shndx
2436 && ((sym_hash)->root.type == bfd_link_hash_defined
2437 || (sym_hash)->root.type == bfd_link_hash_defweak)
2438 && (sym_hash)->root.u.def.section == sec
2439 && (sym_hash)->root.u.def.value >= addr + count
2440 && (sym_hash)->root.u.def.value < toaddr)
2441 {
2442 if ((sym_hash)->root.u.def.value + isym.st_size >= toaddr)
2443 {
2444 isym.st_size += count;
2445 bfd_elf32_swap_symbol_out (abfd, & isym, esym, shndx);
2446 }
2447
2448 (sym_hash)->root.u.def.value -= count;
2449 }
2450 else if (isym.st_shndx == sec_shndx
2451 && ((sym_hash)->root.type == bfd_link_hash_defined
2452 || (sym_hash)->root.type == bfd_link_hash_defweak)
2453 && (sym_hash)->root.u.def.section == sec
2454 && (sym_hash)->root.u.def.value < addr + count)
2455 {
2456 if ((sym_hash)->root.u.def.value+isym.st_size >= addr + count
2457 && (sym_hash)->root.u.def.value+isym.st_size < toaddr)
2458 isym.st_size -= count;
2459
2460 if ((sym_hash)->root.u.def.value >= addr
2461 && (sym_hash)->root.u.def.value < addr + count)
2462 (sym_hash)->root.u.def.value = addr;
2463
2464 bfd_elf32_swap_symbol_out (abfd, & isym, esym, shndx);
2465 }
2466
2467 if (shndx)
2468 ++ shndx;
2469 }
2470
2471 return TRUE;
2472 }
2473
2474 #define NOP_OPCODE (0x0000)
2475 #define MOVHI 0x0640 /* 4byte */
2476 #define MOVHI_MASK 0x07e0
2477 #define MOVHI_R1(insn) ((insn) & 0x1f) /* 4byte */
2478 #define MOVHI_R2(insn) ((insn) >> 11)
2479 #define MOVEA 0x0620 /* 2byte */
2480 #define MOVEA_MASK 0x07e0
2481 #define MOVEA_R1(insn) ((insn) & 0x1f)
2482 #define MOVEA_R2(insn) ((insn) >> 11)
2483 #define JARL_4 0x00040780 /* 4byte */
2484 #define JARL_4_MASK 0xFFFF07FF
2485 #define JARL_R2(insn) (int)(((insn) & (~JARL_4_MASK)) >> 11)
2486 #define ADD_I 0x0240 /* 2byte */
2487 #define ADD_I_MASK 0x07e0
2488 #define ADD_I5(insn) ((((insn) & 0x001f) << 11) >> 11) /* 2byte */
2489 #define ADD_R2(insn) ((insn) >> 11)
2490 #define JMP_R 0x0060 /* 2byte */
2491 #define JMP_R_MASK 0xFFE0
2492 #define JMP_R1(insn) ((insn) & 0x1f)
2493
2494 static bfd_boolean
2495 v850_elf_relax_section (abfd, sec, link_info, again)
2496 bfd *abfd;
2497 asection *sec;
2498 struct bfd_link_info *link_info;
2499 bfd_boolean *again;
2500 {
2501 Elf_Internal_Shdr *symtab_hdr;
2502 Elf_Internal_Rela *internal_relocs;
2503 Elf_Internal_Rela *irel;
2504 Elf_Internal_Rela *irelend;
2505 Elf_Internal_Rela *irelalign = NULL;
2506 Elf_Internal_Sym *isymbuf = NULL;
2507 bfd_byte *contents = NULL;
2508 bfd_vma addr = 0;
2509 bfd_vma toaddr;
2510 int align_pad_size = 0;
2511 bfd_boolean result = TRUE;
2512
2513 *again = FALSE;
2514
2515 if (link_info->relocatable
2516 || (sec->flags & SEC_RELOC) == 0
2517 || sec->reloc_count == 0)
2518 return TRUE;
2519
2520 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
2521
2522 internal_relocs = (_bfd_elf_link_read_relocs
2523 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
2524 link_info->keep_memory));
2525 if (internal_relocs == NULL)
2526 goto error_return;
2527
2528 irelend = internal_relocs + sec->reloc_count;
2529
2530 while (addr < sec->size)
2531 {
2532 toaddr = sec->size;
2533
2534 for (irel = internal_relocs; irel < irelend; irel ++)
2535 if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_ALIGN
2536 && irel->r_offset > addr
2537 && irel->r_offset < toaddr)
2538 toaddr = irel->r_offset;
2539
2540 #ifdef DEBUG_RELAX
2541 fprintf (stderr, "relax region 0x%x to 0x%x align pad %d\n",
2542 addr, toaddr, align_pad_size);
2543 #endif
2544 if (irelalign)
2545 {
2546 bfd_vma alignto;
2547 bfd_vma alignmoveto;
2548
2549 alignmoveto = BFD_ALIGN (addr - align_pad_size, 1 << irelalign->r_addend);
2550 alignto = BFD_ALIGN (addr, 1 << irelalign->r_addend);
2551
2552 if (alignmoveto < alignto)
2553 {
2554 unsigned int i;
2555
2556 align_pad_size = alignto - alignmoveto;
2557 #ifdef DEBUG_RELAX
2558 fprintf (stderr, "relax move region 0x%x to 0x%x delete size 0x%x\n",
2559 alignmoveto, toaddr, align_pad_size);
2560 #endif
2561 if (!v850_elf_relax_delete_bytes (abfd, sec, alignmoveto,
2562 toaddr, align_pad_size))
2563 goto error_return;
2564
2565 for (i = BFD_ALIGN (toaddr - align_pad_size, 1);
2566 (i + 1) < toaddr; i += 2)
2567 bfd_put_16 (abfd, NOP_OPCODE, contents + i);
2568
2569 addr = alignmoveto;
2570 }
2571 else
2572 align_pad_size = 0;
2573 }
2574
2575 for (irel = internal_relocs; irel < irelend; irel++)
2576 {
2577 bfd_vma laddr;
2578 bfd_vma addend;
2579 bfd_vma symval;
2580 int insn[5];
2581 int no_match = -1;
2582 Elf_Internal_Rela *hi_irelfn;
2583 Elf_Internal_Rela *lo_irelfn;
2584 Elf_Internal_Rela *irelcall;
2585 bfd_signed_vma foff;
2586
2587 if (! (irel->r_offset >= addr && irel->r_offset < toaddr
2588 && (ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGCALL
2589 || ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGJUMP)))
2590 continue;
2591
2592 #ifdef DEBUG_RELAX
2593 fprintf (stderr, "relax check r_info 0x%x r_offset 0x%x r_addend 0x%x\n",
2594 irel->r_info,
2595 irel->r_offset,
2596 irel->r_addend );
2597 #endif
2598
2599 /* Get the section contents. */
2600 if (contents == NULL)
2601 {
2602 if (elf_section_data (sec)->this_hdr.contents != NULL)
2603 contents = elf_section_data (sec)->this_hdr.contents;
2604 else
2605 {
2606 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2607 goto error_return;
2608 }
2609 }
2610
2611 /* Read this BFD's local symbols if we haven't done so already. */
2612 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
2613 {
2614 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2615 if (isymbuf == NULL)
2616 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2617 symtab_hdr->sh_info, 0,
2618 NULL, NULL, NULL);
2619 if (isymbuf == NULL)
2620 goto error_return;
2621 }
2622
2623 laddr = irel->r_offset;
2624
2625 if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGCALL)
2626 {
2627 /* Check code for -mlong-calls output. */
2628 if (laddr + 16 <= (bfd_vma) sec->size)
2629 {
2630 insn[0] = bfd_get_16 (abfd, contents + laddr);
2631 insn[1] = bfd_get_16 (abfd, contents + laddr + 4);
2632 insn[2] = bfd_get_32 (abfd, contents + laddr + 8);
2633 insn[3] = bfd_get_16 (abfd, contents + laddr + 12);
2634 insn[4] = bfd_get_16 (abfd, contents + laddr + 14);
2635
2636 if ((insn[0] & MOVHI_MASK) != MOVHI
2637 || MOVHI_R1 (insn[0]) != 0)
2638 no_match = 0;
2639
2640 if (no_match < 0
2641 && ((insn[1] & MOVEA_MASK) != MOVEA
2642 || MOVHI_R2 (insn[0]) != MOVEA_R1 (insn[1])))
2643 no_match = 1;
2644
2645 if (no_match < 0
2646 && (insn[2] & JARL_4_MASK) != JARL_4)
2647 no_match = 2;
2648
2649 if (no_match < 0
2650 && ((insn[3] & ADD_I_MASK) != ADD_I
2651 || ADD_I5 (insn[3]) != 4
2652 || JARL_R2 (insn[2]) != ADD_R2 (insn[3])))
2653 no_match = 3;
2654
2655 if (no_match < 0
2656 && ((insn[4] & JMP_R_MASK) != JMP_R
2657 || MOVEA_R2 (insn[1]) != JMP_R1 (insn[4])))
2658 no_match = 4;
2659 }
2660 else
2661 {
2662 ((*_bfd_error_handler)
2663 ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized insns",
2664 bfd_get_filename (abfd), (unsigned long) irel->r_offset));
2665
2666 continue;
2667 }
2668
2669 if (no_match >= 0)
2670 {
2671 ((*_bfd_error_handler)
2672 ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized insn 0x%x",
2673 bfd_get_filename (abfd), (unsigned long) irel->r_offset+no_match, insn[no_match]));
2674
2675 continue;
2676 }
2677
2678 /* Get the reloc for the address from which the register is
2679 being loaded. This reloc will tell us which function is
2680 actually being called. */
2681 for (hi_irelfn = internal_relocs; hi_irelfn < irelend; hi_irelfn ++)
2682 if (hi_irelfn->r_offset == laddr + 2
2683 && ELF32_R_TYPE (hi_irelfn->r_info)
2684 == (int) R_V850_HI16_S)
2685 break;
2686
2687 for (lo_irelfn = internal_relocs; lo_irelfn < irelend; lo_irelfn ++)
2688 if (lo_irelfn->r_offset == laddr + 6
2689 && ELF32_R_TYPE (lo_irelfn->r_info)
2690 == (int) R_V850_LO16)
2691 break;
2692
2693 for (irelcall = internal_relocs; irelcall < irelend; irelcall ++)
2694 if (irelcall->r_offset == laddr + 8
2695 && ELF32_R_TYPE (irelcall->r_info)
2696 == (int) R_V850_22_PCREL)
2697 break;
2698
2699 if ( hi_irelfn == irelend
2700 || lo_irelfn == irelend
2701 || irelcall == irelend)
2702 {
2703 ((*_bfd_error_handler)
2704 ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized reloc",
2705 bfd_get_filename (abfd), (unsigned long) irel->r_offset ));
2706
2707 continue;
2708 }
2709
2710 if (ELF32_R_SYM (irelcall->r_info) < symtab_hdr->sh_info)
2711 {
2712 Elf_Internal_Sym * isym;
2713
2714 /* A local symbol. */
2715 isym = isymbuf + ELF32_R_SYM (irelcall->r_info);
2716
2717 symval = isym->st_value;
2718 }
2719 else
2720 {
2721 unsigned long indx;
2722 struct elf_link_hash_entry * h;
2723
2724 /* An external symbol. */
2725 indx = ELF32_R_SYM (irelcall->r_info) - symtab_hdr->sh_info;
2726 h = elf_sym_hashes (abfd)[indx];
2727 BFD_ASSERT (h != NULL);
2728
2729 if ( h->root.type != bfd_link_hash_defined
2730 && h->root.type != bfd_link_hash_defweak)
2731 /* This appears to be a reference to an undefined
2732 symbol. Just ignore it--it will be caught by the
2733 regular reloc processing. */
2734 continue;
2735
2736 symval = h->root.u.def.value;
2737 }
2738
2739 if (symval + irelcall->r_addend != irelcall->r_offset + 4)
2740 {
2741 ((*_bfd_error_handler)
2742 ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized reloc 0x%lx",
2743 bfd_get_filename (abfd), (unsigned long) irel->r_offset, irelcall->r_offset ));
2744
2745 continue;
2746 }
2747
2748 /* Get the value of the symbol referred to by the reloc. */
2749 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
2750 {
2751 Elf_Internal_Sym *isym;
2752 asection *sym_sec;
2753
2754 /* A local symbol. */
2755 isym = isymbuf + ELF32_R_SYM (hi_irelfn->r_info);
2756
2757 if (isym->st_shndx == SHN_UNDEF)
2758 sym_sec = bfd_und_section_ptr;
2759 else if (isym->st_shndx == SHN_ABS)
2760 sym_sec = bfd_abs_section_ptr;
2761 else if (isym->st_shndx == SHN_COMMON)
2762 sym_sec = bfd_com_section_ptr;
2763 else
2764 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2765 symval = (isym->st_value
2766 + sym_sec->output_section->vma
2767 + sym_sec->output_offset);
2768 }
2769 else
2770 {
2771 unsigned long indx;
2772 struct elf_link_hash_entry *h;
2773
2774 /* An external symbol. */
2775 indx = ELF32_R_SYM (hi_irelfn->r_info) - symtab_hdr->sh_info;
2776 h = elf_sym_hashes (abfd)[indx];
2777 BFD_ASSERT (h != NULL);
2778
2779 if ( h->root.type != bfd_link_hash_defined
2780 && h->root.type != bfd_link_hash_defweak)
2781 /* This appears to be a reference to an undefined
2782 symbol. Just ignore it--it will be caught by the
2783 regular reloc processing. */
2784 continue;
2785
2786 symval = (h->root.u.def.value
2787 + h->root.u.def.section->output_section->vma
2788 + h->root.u.def.section->output_offset);
2789 }
2790
2791 addend = irel->r_addend;
2792
2793 foff = (symval + addend
2794 - (irel->r_offset
2795 + sec->output_section->vma
2796 + sec->output_offset
2797 + 4));
2798 #ifdef DEBUG_RELAX
2799 fprintf (stderr, "relax longcall r_offset 0x%x ptr 0x%x symbol 0x%x addend 0x%x distance 0x%x\n",
2800 irel->r_offset,
2801 (irel->r_offset
2802 + sec->output_section->vma
2803 + sec->output_offset),
2804 symval, addend, foff);
2805 #endif
2806
2807 if (foff < -0x100000 || foff >= 0x100000)
2808 /* After all that work, we can't shorten this function call. */
2809 continue;
2810
2811 /* For simplicity of coding, we are going to modify the section
2812 contents, the section relocs, and the BFD symbol table. We
2813 must tell the rest of the code not to free up this
2814 information. It would be possible to instead create a table
2815 of changes which have to be made, as is done in coff-mips.c;
2816 that would be more work, but would require less memory when
2817 the linker is run. */
2818 elf_section_data (sec)->relocs = internal_relocs;
2819 elf_section_data (sec)->this_hdr.contents = contents;
2820 symtab_hdr->contents = (bfd_byte *) isymbuf;
2821
2822 /* Replace the long call with a jarl. */
2823 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_22_PCREL);
2824
2825 addend = 0;
2826
2827 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
2828 /* If this needs to be changed because of future relaxing,
2829 it will be handled here like other internal IND12W
2830 relocs. */
2831 bfd_put_32 (abfd,
2832 0x00000780 | (JARL_R2 (insn[2])<<11) | ((addend << 16) & 0xffff) | ((addend >> 16) & 0xf),
2833 contents + irel->r_offset);
2834 else
2835 /* We can't fully resolve this yet, because the external
2836 symbol value may be changed by future relaxing.
2837 We let the final link phase handle it. */
2838 bfd_put_32 (abfd, 0x00000780 | (JARL_R2 (insn[2])<<11),
2839 contents + irel->r_offset);
2840
2841 hi_irelfn->r_info =
2842 ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_NONE);
2843 lo_irelfn->r_info =
2844 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_V850_NONE);
2845 irelcall->r_info =
2846 ELF32_R_INFO (ELF32_R_SYM (irelcall->r_info), R_V850_NONE);
2847
2848 if (! v850_elf_relax_delete_bytes (abfd, sec,
2849 irel->r_offset + 4, toaddr, 12))
2850 goto error_return;
2851
2852 align_pad_size += 12;
2853 }
2854 else if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGJUMP)
2855 {
2856 /* Check code for -mlong-jumps output. */
2857 if (laddr + 10 <= (bfd_vma) sec->size)
2858 {
2859 insn[0] = bfd_get_16 (abfd, contents + laddr);
2860 insn[1] = bfd_get_16 (abfd, contents + laddr + 4);
2861 insn[2] = bfd_get_16 (abfd, contents + laddr + 8);
2862
2863 if ((insn[0] & MOVHI_MASK) != MOVHI
2864 || MOVHI_R1 (insn[0]) != 0)
2865 no_match = 0;
2866
2867 if (no_match < 0
2868 && ((insn[1] & MOVEA_MASK) != MOVEA
2869 || MOVHI_R2 (insn[0]) != MOVEA_R1 (insn[1])))
2870 no_match = 1;
2871
2872 if (no_match < 0
2873 && ((insn[2] & JMP_R_MASK) != JMP_R
2874 || MOVEA_R2 (insn[1]) != JMP_R1 (insn[2])))
2875 no_match = 4;
2876 }
2877 else
2878 {
2879 ((*_bfd_error_handler)
2880 ("%s: 0x%lx: warning: R_V850_LONGJUMP points to unrecognized insns",
2881 bfd_get_filename (abfd), (unsigned long) irel->r_offset));
2882
2883 continue;
2884 }
2885
2886 if (no_match >= 0)
2887 {
2888 ((*_bfd_error_handler)
2889 ("%s: 0x%lx: warning: R_V850_LONGJUMP points to unrecognized insn 0x%x",
2890 bfd_get_filename (abfd), (unsigned long) irel->r_offset+no_match, insn[no_match]));
2891
2892 continue;
2893 }
2894
2895 /* Get the reloc for the address from which the register is
2896 being loaded. This reloc will tell us which function is
2897 actually being called. */
2898 for (hi_irelfn = internal_relocs; hi_irelfn < irelend; hi_irelfn ++)
2899 if (hi_irelfn->r_offset == laddr + 2
2900 && ELF32_R_TYPE (hi_irelfn->r_info) == (int) R_V850_HI16_S)
2901 break;
2902
2903 for (lo_irelfn = internal_relocs; lo_irelfn < irelend; lo_irelfn ++)
2904 if (lo_irelfn->r_offset == laddr + 6
2905 && ELF32_R_TYPE (lo_irelfn->r_info) == (int) R_V850_LO16)
2906 break;
2907
2908 if ( hi_irelfn == irelend
2909 || lo_irelfn == irelend)
2910 {
2911 ((*_bfd_error_handler)
2912 ("%s: 0x%lx: warning: R_V850_LONGJUMP points to unrecognized reloc",
2913 bfd_get_filename (abfd), (unsigned long) irel->r_offset ));
2914
2915 continue;
2916 }
2917
2918 /* Get the value of the symbol referred to by the reloc. */
2919 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
2920 {
2921 Elf_Internal_Sym * isym;
2922 asection * sym_sec;
2923
2924 /* A local symbol. */
2925 isym = isymbuf + ELF32_R_SYM (hi_irelfn->r_info);
2926
2927 if (isym->st_shndx == SHN_UNDEF)
2928 sym_sec = bfd_und_section_ptr;
2929 else if (isym->st_shndx == SHN_ABS)
2930 sym_sec = bfd_abs_section_ptr;
2931 else if (isym->st_shndx == SHN_COMMON)
2932 sym_sec = bfd_com_section_ptr;
2933 else
2934 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2935 symval = (isym->st_value
2936 + sym_sec->output_section->vma
2937 + sym_sec->output_offset);
2938 #ifdef DEBUG_RELAX
2939 {
2940 char * name = bfd_elf_string_from_elf_section
2941 (abfd, symtab_hdr->sh_link, isym->st_name);
2942
2943 fprintf (stderr, "relax long jump local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
2944 sym_sec->name, name, isym->st_name,
2945 sym_sec->output_section->vma,
2946 sym_sec->output_offset,
2947 isym->st_value, irel->r_addend);
2948 }
2949 #endif
2950 }
2951 else
2952 {
2953 unsigned long indx;
2954 struct elf_link_hash_entry * h;
2955
2956 /* An external symbol. */
2957 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2958 h = elf_sym_hashes (abfd)[indx];
2959 BFD_ASSERT (h != NULL);
2960
2961 if ( h->root.type != bfd_link_hash_defined
2962 && h->root.type != bfd_link_hash_defweak)
2963 /* This appears to be a reference to an undefined
2964 symbol. Just ignore it--it will be caught by the
2965 regular reloc processing. */
2966 continue;
2967
2968 symval = (h->root.u.def.value
2969 + h->root.u.def.section->output_section->vma
2970 + h->root.u.def.section->output_offset);
2971 #ifdef DEBUG_RELAX
2972 fprintf (stderr,
2973 "relax longjump defined: sec: %s, name: %s, value: %x + %x + %x addend %x\n",
2974 sec->name, h->root.root.string, h->root.u.def.value,
2975 sec->output_section->vma, sec->output_offset, irel->r_addend);
2976 #endif
2977 }
2978
2979 addend = irel->r_addend;
2980
2981 foff = (symval + addend
2982 - (irel->r_offset
2983 + sec->output_section->vma
2984 + sec->output_offset
2985 + 4));
2986 #ifdef DEBUG_RELAX
2987 fprintf (stderr, "relax longjump r_offset 0x%x ptr 0x%x symbol 0x%x addend 0x%x distance 0x%x\n",
2988 irel->r_offset,
2989 (irel->r_offset
2990 + sec->output_section->vma
2991 + sec->output_offset),
2992 symval, addend, foff);
2993 #endif
2994 if (foff < -0x100000 || foff >= 0x100000)
2995 /* After all that work, we can't shorten this function call. */
2996 continue;
2997
2998 /* For simplicity of coding, we are going to modify the section
2999 contents, the section relocs, and the BFD symbol table. We
3000 must tell the rest of the code not to free up this
3001 information. It would be possible to instead create a table
3002 of changes which have to be made, as is done in coff-mips.c;
3003 that would be more work, but would require less memory when
3004 the linker is run. */
3005 elf_section_data (sec)->relocs = internal_relocs;
3006 elf_section_data (sec)->this_hdr.contents = contents;
3007 symtab_hdr->contents = (bfd_byte *) isymbuf;
3008
3009 if (foff < -0x100 || foff >= 0x100)
3010 {
3011 /* Replace the long jump with a jr. */
3012
3013 irel->r_info =
3014 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_V850_22_PCREL);
3015
3016 irel->r_addend = addend;
3017 addend = 0;
3018
3019 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
3020 /* If this needs to be changed because of future relaxing,
3021 it will be handled here like other internal IND12W
3022 relocs. */
3023 bfd_put_32 (abfd,
3024 0x00000780 | ((addend << 15) & 0xffff0000) | ((addend >> 17) & 0xf),
3025 contents + irel->r_offset);
3026 else
3027 /* We can't fully resolve this yet, because the external
3028 symbol value may be changed by future relaxing.
3029 We let the final link phase handle it. */
3030 bfd_put_32 (abfd, 0x00000780, contents + irel->r_offset);
3031
3032 hi_irelfn->r_info =
3033 ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_NONE);
3034 lo_irelfn->r_info =
3035 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_V850_NONE);
3036 if (!v850_elf_relax_delete_bytes (abfd, sec,
3037 irel->r_offset + 4, toaddr, 6))
3038 goto error_return;
3039
3040 align_pad_size += 6;
3041 }
3042 else
3043 {
3044 /* Replace the long jump with a br. */
3045
3046 irel->r_info =
3047 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_V850_9_PCREL);
3048
3049 irel->r_addend = addend;
3050 addend = 0;
3051
3052 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
3053 /* If this needs to be changed because of future relaxing,
3054 it will be handled here like other internal IND12W
3055 relocs. */
3056 bfd_put_16 (abfd,
3057 0x0585 | ((addend << 10) & 0xf800) | ((addend << 3) & 0x0070),
3058 contents + irel->r_offset);
3059 else
3060 /* We can't fully resolve this yet, because the external
3061 symbol value may be changed by future relaxing.
3062 We let the final link phase handle it. */
3063 bfd_put_16 (abfd, 0x0585, contents + irel->r_offset);
3064
3065 hi_irelfn->r_info =
3066 ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_NONE);
3067 lo_irelfn->r_info =
3068 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_V850_NONE);
3069 if (!v850_elf_relax_delete_bytes (abfd, sec,
3070 irel->r_offset + 2, toaddr, 8))
3071 goto error_return;
3072
3073 align_pad_size += 8;
3074 }
3075 }
3076 }
3077
3078 irelalign = NULL;
3079 for (irel = internal_relocs; irel < irelend; irel++)
3080 {
3081 if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_ALIGN
3082 && irel->r_offset == toaddr)
3083 {
3084 irel->r_offset -= align_pad_size;
3085
3086 if (irelalign == NULL || irelalign->r_addend > irel->r_addend)
3087 irelalign = irel;
3088 }
3089 }
3090
3091 addr = toaddr;
3092 }
3093
3094 if (!irelalign)
3095 {
3096 #ifdef DEBUG_RELAX
3097 fprintf (stderr, "relax pad %d shorten %d -> %d\n",
3098 align_pad_size,
3099 sec->size,
3100 sec->size - align_pad_size);
3101 #endif
3102 sec->size -= align_pad_size;
3103 }
3104
3105 finish:
3106 if (internal_relocs != NULL
3107 && elf_section_data (sec)->relocs != internal_relocs)
3108 free (internal_relocs);
3109
3110 if (contents != NULL
3111 && elf_section_data (sec)->this_hdr.contents != (unsigned char *) contents)
3112 free (contents);
3113
3114 if (isymbuf != NULL
3115 && symtab_hdr->contents != (bfd_byte *) isymbuf)
3116 free (isymbuf);
3117
3118 return result;
3119
3120 error_return:
3121 result = FALSE;
3122 goto finish;
3123 }
3124
3125 static struct bfd_elf_special_section const v850_elf_special_sections[]=
3126 {
3127 { ".sdata", 6, -2, SHT_PROGBITS, (SHF_ALLOC + SHF_WRITE
3128 + SHF_V850_GPREL) },
3129 { ".rosdata", 8, -2, SHT_PROGBITS, (SHF_ALLOC
3130 + SHF_V850_GPREL) },
3131 { ".sbss", 5, -2, SHT_NOBITS, (SHF_ALLOC + SHF_WRITE
3132 + SHF_V850_GPREL) },
3133 { ".scommon", 8, -2, SHT_V850_SCOMMON, (SHF_ALLOC + SHF_WRITE
3134 + SHF_V850_GPREL) },
3135 { ".tdata", 6, -2, SHT_PROGBITS, (SHF_ALLOC + SHF_WRITE
3136 + SHF_V850_EPREL) },
3137 { ".tbss", 5, -2, SHT_NOBITS, (SHF_ALLOC + SHF_WRITE
3138 + SHF_V850_EPREL) },
3139 { ".tcommon", 8, -2, SHT_V850_TCOMMON, (SHF_ALLOC + SHF_WRITE
3140 + SHF_V850_R0REL) },
3141 { ".zdata", 6, -2, SHT_PROGBITS, (SHF_ALLOC + SHF_WRITE
3142 + SHF_V850_R0REL) },
3143 { ".rozdata", 8, -2, SHT_PROGBITS, (SHF_ALLOC
3144 + SHF_V850_R0REL) },
3145 { ".zbss", 5, -2, SHT_NOBITS, (SHF_ALLOC + SHF_WRITE
3146 + SHF_V850_R0REL) },
3147 { ".zcommon", 8, -2, SHT_V850_ZCOMMON, (SHF_ALLOC + SHF_WRITE
3148 + SHF_V850_R0REL) },
3149 { ".call_table_data", 16, 0, SHT_PROGBITS, (SHF_ALLOC
3150 + SHF_WRITE) },
3151 { ".call_table_text", 16, 0, SHT_PROGBITS, (SHF_ALLOC + SHF_WRITE
3152 + SHF_EXECINSTR) },
3153 { NULL, 0, 0, 0, 0 }
3154 };
3155 \f
3156 #define TARGET_LITTLE_SYM bfd_elf32_v850_vec
3157 #define TARGET_LITTLE_NAME "elf32-v850"
3158 #define ELF_ARCH bfd_arch_v850
3159 #define ELF_MACHINE_CODE EM_V850
3160 #define ELF_MACHINE_ALT1 EM_CYGNUS_V850
3161 #define ELF_MAXPAGESIZE 0x1000
3162
3163 #define elf_info_to_howto v850_elf_info_to_howto_rela
3164 #define elf_info_to_howto_rel v850_elf_info_to_howto_rel
3165
3166 #define elf_backend_check_relocs v850_elf_check_relocs
3167 #define elf_backend_relocate_section v850_elf_relocate_section
3168 #define elf_backend_object_p v850_elf_object_p
3169 #define elf_backend_final_write_processing v850_elf_final_write_processing
3170 #define elf_backend_section_from_bfd_section v850_elf_section_from_bfd_section
3171 #define elf_backend_symbol_processing v850_elf_symbol_processing
3172 #define elf_backend_add_symbol_hook v850_elf_add_symbol_hook
3173 #define elf_backend_link_output_symbol_hook v850_elf_link_output_symbol_hook
3174 #define elf_backend_section_from_shdr v850_elf_section_from_shdr
3175 #define elf_backend_fake_sections v850_elf_fake_sections
3176 #define elf_backend_gc_mark_hook v850_elf_gc_mark_hook
3177 #define elf_backend_gc_sweep_hook v850_elf_gc_sweep_hook
3178 #define elf_backend_special_sections v850_elf_special_sections
3179
3180 #define elf_backend_can_gc_sections 1
3181 #define elf_backend_rela_normal 1
3182
3183 #define bfd_elf32_bfd_is_local_label_name v850_elf_is_local_label_name
3184 #define bfd_elf32_bfd_reloc_type_lookup v850_elf_reloc_type_lookup
3185 #define bfd_elf32_bfd_merge_private_bfd_data v850_elf_merge_private_bfd_data
3186 #define bfd_elf32_bfd_set_private_flags v850_elf_set_private_flags
3187 #define bfd_elf32_bfd_print_private_bfd_data v850_elf_print_private_bfd_data
3188 #define bfd_elf32_bfd_relax_section v850_elf_relax_section
3189
3190 #define elf_symbol_leading_char '_'
3191
3192 #include "elf32-target.h"
GDB Binutils - Deliverables
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