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* config/sh/tm-sh.h (BELIEVE_PCC_PROMOTION): Define, so that
[thirdparty/binutils-gdb.git] / bfd / elf32-v850.c
1 /* V850-specific support for 32-bit ELF
2 Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19
20
21
22 /* XXX FIXME: This code is littered with 32bit int, 16bit short, 8bit char
23 dependencies. As is the gas & simulator code or the v850. */
24
25
26 #include "bfd.h"
27 #include "sysdep.h"
28 #include "bfdlink.h"
29 #include "libbfd.h"
30 #include "elf-bfd.h"
31 #include "elf/v850.h"
32
33 /* sign-extend a 24-bit number */
34 #define SEXT24(x) ((((x) & 0xffffff) ^ (~ 0x7fffff)) + 0x800000)
35
36 static reloc_howto_type *v850_elf_reloc_type_lookup
37 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
38 static void v850_elf_info_to_howto_rel
39 PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
40 static void v850_elf_info_to_howto_rela
41 PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
42 static bfd_reloc_status_type v850_elf_reloc
43 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
44 static boolean v850_elf_is_local_label_name
45 PARAMS ((bfd *, const char *));
46 static boolean v850_elf_relocate_section
47 PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
48 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
49 static bfd_reloc_status_type v850_elf_perform_relocation
50 PARAMS ((bfd *, int, bfd_vma, bfd_byte *));
51 static boolean v850_elf_check_relocs
52 PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *));
53 static void remember_hi16s_reloc
54 PARAMS ((bfd *, bfd_vma, bfd_byte *));
55 static bfd_byte * find_remembered_hi16s_reloc
56 PARAMS ((bfd_vma addend));
57 static bfd_reloc_status_type v850_elf_final_link_relocate
58 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, bfd_vma,
59 bfd_vma, bfd_vma, struct bfd_link_info *, asection *, int));
60 static boolean v850_elf_object_p
61 PARAMS ((bfd *));
62 static boolean v850_elf_fake_sections
63 PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *));
64 static void v850_elf_final_write_processing
65 PARAMS ((bfd *, boolean));
66 static boolean v850_elf_set_private_flags
67 PARAMS ((bfd *, flagword));
68 static boolean v850_elf_copy_private_bfd_data
69 PARAMS ((bfd *, bfd *));
70 static boolean v850_elf_merge_private_bfd_data
71 PARAMS ((bfd *, bfd *));
72 static boolean v850_elf_print_private_bfd_data
73 PARAMS ((bfd *, PTR));
74 static boolean v850_elf_section_from_bfd_section
75 PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *));
76 static void v850_elf_symbol_processing
77 PARAMS ((bfd *, asymbol *));
78 static boolean v850_elf_add_symbol_hook
79 PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
80 const char **, flagword *, asection **, bfd_vma *));
81 static boolean v850_elf_link_output_symbol_hook
82 PARAMS ((bfd *, struct bfd_link_info *, const char *,
83 Elf_Internal_Sym *, asection *));
84 static boolean v850_elf_section_from_shdr
85 PARAMS ((bfd *, Elf_Internal_Shdr *, char *));
86
87 /* Note: It is REQUIRED that the 'type' value of each entry in this array
88 match the index of the entry in the array. */
89 static reloc_howto_type v850_elf_howto_table[] =
90 {
91 /* This reloc does nothing. */
92 HOWTO (R_V850_NONE, /* type */
93 0, /* rightshift */
94 2, /* size (0 = byte, 1 = short, 2 = long) */
95 32, /* bitsize */
96 false, /* pc_relative */
97 0, /* bitpos */
98 complain_overflow_bitfield, /* complain_on_overflow */
99 bfd_elf_generic_reloc, /* special_function */
100 "R_V850_NONE", /* name */
101 false, /* partial_inplace */
102 0, /* src_mask */
103 0, /* dst_mask */
104 false), /* pcrel_offset */
105
106 /* A PC relative 9 bit branch. */
107 HOWTO (R_V850_9_PCREL, /* type */
108 2, /* rightshift */
109 2, /* size (0 = byte, 1 = short, 2 = long) */
110 26, /* bitsize */
111 true, /* pc_relative */
112 0, /* bitpos */
113 complain_overflow_bitfield, /* complain_on_overflow */
114 v850_elf_reloc, /* special_function */
115 "R_V850_9_PCREL", /* name */
116 false, /* partial_inplace */
117 0x00ffffff, /* src_mask */
118 0x00ffffff, /* dst_mask */
119 true), /* pcrel_offset */
120
121 /* A PC relative 22 bit branch. */
122 HOWTO (R_V850_22_PCREL, /* type */
123 2, /* rightshift */
124 2, /* size (0 = byte, 1 = short, 2 = long) */
125 22, /* bitsize */
126 true, /* pc_relative */
127 7, /* bitpos */
128 complain_overflow_signed, /* complain_on_overflow */
129 v850_elf_reloc, /* special_function */
130 "R_V850_22_PCREL", /* name */
131 false, /* partial_inplace */
132 0x07ffff80, /* src_mask */
133 0x07ffff80, /* dst_mask */
134 true), /* pcrel_offset */
135
136 /* High 16 bits of symbol value. */
137 HOWTO (R_V850_HI16_S, /* type */
138 0, /* rightshift */
139 1, /* size (0 = byte, 1 = short, 2 = long) */
140 16, /* bitsize */
141 false, /* pc_relative */
142 0, /* bitpos */
143 complain_overflow_dont, /* complain_on_overflow */
144 v850_elf_reloc, /* special_function */
145 "R_V850_HI16_S", /* name */
146 true, /* partial_inplace */
147 0xffff, /* src_mask */
148 0xffff, /* dst_mask */
149 false), /* pcrel_offset */
150
151 /* High 16 bits of symbol value. */
152 HOWTO (R_V850_HI16, /* type */
153 0, /* rightshift */
154 1, /* size (0 = byte, 1 = short, 2 = long) */
155 16, /* bitsize */
156 false, /* pc_relative */
157 0, /* bitpos */
158 complain_overflow_dont, /* complain_on_overflow */
159 v850_elf_reloc, /* special_function */
160 "R_V850_HI16", /* name */
161 true, /* partial_inplace */
162 0xffff, /* src_mask */
163 0xffff, /* dst_mask */
164 false), /* pcrel_offset */
165
166 /* Low 16 bits of symbol value. */
167 HOWTO (R_V850_LO16, /* type */
168 0, /* rightshift */
169 1, /* size (0 = byte, 1 = short, 2 = long) */
170 16, /* bitsize */
171 false, /* pc_relative */
172 0, /* bitpos */
173 complain_overflow_dont, /* complain_on_overflow */
174 v850_elf_reloc, /* special_function */
175 "R_V850_LO16", /* name */
176 true, /* partial_inplace */
177 0xffff, /* src_mask */
178 0xffff, /* dst_mask */
179 false), /* pcrel_offset */
180
181 /* Simple 32bit reloc. */
182 HOWTO (R_V850_32, /* type */
183 0, /* rightshift */
184 2, /* size (0 = byte, 1 = short, 2 = long) */
185 32, /* bitsize */
186 false, /* pc_relative */
187 0, /* bitpos */
188 complain_overflow_dont, /* complain_on_overflow */
189 v850_elf_reloc, /* special_function */
190 "R_V850_32", /* name */
191 true, /* partial_inplace */
192 0xffffffff, /* src_mask */
193 0xffffffff, /* dst_mask */
194 false), /* pcrel_offset */
195
196 /* Simple 16bit reloc. */
197 HOWTO (R_V850_16, /* type */
198 0, /* rightshift */
199 1, /* size (0 = byte, 1 = short, 2 = long) */
200 16, /* bitsize */
201 false, /* pc_relative */
202 0, /* bitpos */
203 complain_overflow_dont, /* complain_on_overflow */
204 bfd_elf_generic_reloc, /* special_function */
205 "R_V850_16", /* name */
206 true, /* partial_inplace */
207 0xffff, /* src_mask */
208 0xffff, /* dst_mask */
209 false), /* pcrel_offset */
210
211 /* Simple 8bit reloc. */
212 HOWTO (R_V850_8, /* type */
213 0, /* rightshift */
214 0, /* size (0 = byte, 1 = short, 2 = long) */
215 8, /* bitsize */
216 false, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 bfd_elf_generic_reloc, /* special_function */
220 "R_V850_8", /* name */
221 true, /* partial_inplace */
222 0xff, /* src_mask */
223 0xff, /* dst_mask */
224 false), /* pcrel_offset */
225
226 /* 16 bit offset from the short data area pointer. */
227 HOWTO (R_V850_SDA_16_16_OFFSET, /* type */
228 0, /* rightshift */
229 1, /* size (0 = byte, 1 = short, 2 = long) */
230 16, /* bitsize */
231 false, /* pc_relative */
232 0, /* bitpos */
233 complain_overflow_dont, /* complain_on_overflow */
234 v850_elf_reloc, /* special_function */
235 "R_V850_SDA_16_16_OFFSET", /* name */
236 false, /* partial_inplace */
237 0xffff, /* src_mask */
238 0xffff, /* dst_mask */
239 false), /* pcrel_offset */
240
241 /* 15 bit offset from the short data area pointer. */
242 HOWTO (R_V850_SDA_15_16_OFFSET, /* type */
243 1, /* rightshift */
244 1, /* size (0 = byte, 1 = short, 2 = long) */
245 16, /* bitsize */
246 false, /* pc_relative */
247 1, /* bitpos */
248 complain_overflow_dont, /* complain_on_overflow */
249 v850_elf_reloc, /* special_function */
250 "R_V850_SDA_15_16_OFFSET", /* name */
251 false, /* partial_inplace */
252 0xfffe, /* src_mask */
253 0xfffe, /* dst_mask */
254 false), /* pcrel_offset */
255
256 /* 16 bit offset from the zero data area pointer. */
257 HOWTO (R_V850_ZDA_16_16_OFFSET, /* type */
258 0, /* rightshift */
259 1, /* size (0 = byte, 1 = short, 2 = long) */
260 16, /* bitsize */
261 false, /* pc_relative */
262 0, /* bitpos */
263 complain_overflow_dont, /* complain_on_overflow */
264 v850_elf_reloc, /* special_function */
265 "R_V850_ZDA_16_16_OFFSET", /* name */
266 false, /* partial_inplace */
267 0xffff, /* src_mask */
268 0xffff, /* dst_mask */
269 false), /* pcrel_offset */
270
271 /* 15 bit offset from the zero data area pointer. */
272 HOWTO (R_V850_ZDA_15_16_OFFSET, /* type */
273 1, /* rightshift */
274 1, /* size (0 = byte, 1 = short, 2 = long) */
275 16, /* bitsize */
276 false, /* pc_relative */
277 1, /* bitpos */
278 complain_overflow_dont, /* complain_on_overflow */
279 v850_elf_reloc, /* special_function */
280 "R_V850_ZDA_15_16_OFFSET", /* name */
281 false, /* partial_inplace */
282 0xfffe, /* src_mask */
283 0xfffe, /* dst_mask */
284 false), /* pcrel_offset */
285
286 /* 6 bit offset from the tiny data area pointer. */
287 HOWTO (R_V850_TDA_6_8_OFFSET, /* type */
288 2, /* rightshift */
289 1, /* size (0 = byte, 1 = short, 2 = long) */
290 8, /* bitsize */
291 false, /* pc_relative */
292 1, /* bitpos */
293 complain_overflow_dont, /* complain_on_overflow */
294 v850_elf_reloc, /* special_function */
295 "R_V850_TDA_6_8_OFFSET", /* name */
296 false, /* partial_inplace */
297 0x7e, /* src_mask */
298 0x7e, /* dst_mask */
299 false), /* pcrel_offset */
300
301 /* 8 bit offset from the tiny data area pointer. */
302 HOWTO (R_V850_TDA_7_8_OFFSET, /* type */
303 1, /* rightshift */
304 1, /* size (0 = byte, 1 = short, 2 = long) */
305 8, /* bitsize */
306 false, /* pc_relative */
307 0, /* bitpos */
308 complain_overflow_dont, /* complain_on_overflow */
309 v850_elf_reloc, /* special_function */
310 "R_V850_TDA_7_8_OFFSET", /* name */
311 false, /* partial_inplace */
312 0x7f, /* src_mask */
313 0x7f, /* dst_mask */
314 false), /* pcrel_offset */
315
316 /* 7 bit offset from the tiny data area pointer. */
317 HOWTO (R_V850_TDA_7_7_OFFSET, /* type */
318 0, /* rightshift */
319 1, /* size (0 = byte, 1 = short, 2 = long) */
320 7, /* bitsize */
321 false, /* pc_relative */
322 0, /* bitpos */
323 complain_overflow_dont, /* complain_on_overflow */
324 v850_elf_reloc, /* special_function */
325 "R_V850_TDA_7_7_OFFSET", /* name */
326 false, /* partial_inplace */
327 0x7f, /* src_mask */
328 0x7f, /* dst_mask */
329 false), /* pcrel_offset */
330
331 /* 16 bit offset from the tiny data area pointer! */
332 HOWTO (R_V850_TDA_16_16_OFFSET, /* type */
333 0, /* rightshift */
334 1, /* size (0 = byte, 1 = short, 2 = long) */
335 16, /* bitsize */
336 false, /* pc_relative */
337 0, /* bitpos */
338 complain_overflow_dont, /* complain_on_overflow */
339 v850_elf_reloc, /* special_function */
340 "R_V850_TDA_16_16_OFFSET", /* name */
341 false, /* partial_inplace */
342 0xffff, /* src_mask */
343 0xfff, /* dst_mask */
344 false), /* pcrel_offset */
345
346 /* start-sanitize-v850e */
347
348 /* 5 bit offset from the tiny data area pointer. */
349 HOWTO (R_V850_TDA_4_5_OFFSET, /* type */
350 1, /* rightshift */
351 1, /* size (0 = byte, 1 = short, 2 = long) */
352 5, /* bitsize */
353 false, /* pc_relative */
354 0, /* bitpos */
355 complain_overflow_dont, /* complain_on_overflow */
356 v850_elf_reloc, /* special_function */
357 "R_V850_TDA_4_5_OFFSET", /* name */
358 false, /* partial_inplace */
359 0x0f, /* src_mask */
360 0x0f, /* dst_mask */
361 false), /* pcrel_offset */
362
363 /* 4 bit offset from the tiny data area pointer. */
364 HOWTO (R_V850_TDA_4_4_OFFSET, /* type */
365 0, /* rightshift */
366 1, /* size (0 = byte, 1 = short, 2 = long) */
367 4, /* bitsize */
368 false, /* pc_relative */
369 0, /* bitpos */
370 complain_overflow_dont, /* complain_on_overflow */
371 v850_elf_reloc, /* special_function */
372 "R_V850_TDA_4_4_OFFSET", /* name */
373 false, /* partial_inplace */
374 0x0f, /* src_mask */
375 0x0f, /* dst_mask */
376 false), /* pcrel_offset */
377
378 /* 16 bit offset from the short data area pointer. */
379 HOWTO (R_V850_SDA_16_16_SPLIT_OFFSET, /* type */
380 0, /* rightshift */
381 2, /* size (0 = byte, 1 = short, 2 = long) */
382 16, /* bitsize */
383 false, /* pc_relative */
384 0, /* bitpos */
385 complain_overflow_dont, /* complain_on_overflow */
386 v850_elf_reloc, /* special_function */
387 "R_V850_SDA_16_16_SPLIT_OFFSET",/* name */
388 false, /* partial_inplace */
389 0xfffe0020, /* src_mask */
390 0xfffe0020, /* dst_mask */
391 false), /* pcrel_offset */
392
393 /* 16 bit offset from the zero data area pointer. */
394 HOWTO (R_V850_ZDA_16_16_SPLIT_OFFSET, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 false, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_dont, /* complain_on_overflow */
401 v850_elf_reloc, /* special_function */
402 "R_V850_ZDA_16_16_SPLIT_OFFSET",/* name */
403 false, /* partial_inplace */
404 0xfffe0020, /* src_mask */
405 0xfffe0020, /* dst_mask */
406 false), /* pcrel_offset */
407
408 /* 6 bit offset from the call table base pointer. */
409 HOWTO (R_V850_CALLT_6_7_OFFSET, /* type */
410 0, /* rightshift */
411 1, /* size (0 = byte, 1 = short, 2 = long) */
412 7, /* bitsize */
413 false, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_dont, /* complain_on_overflow */
416 v850_elf_reloc, /* special_function */
417 "R_V850_CALLT_6_7_OFFSET", /* name */
418 false, /* partial_inplace */
419 0x3f, /* src_mask */
420 0x3f, /* dst_mask */
421 false), /* pcrel_offset */
422
423 /* 16 bit offset from the call table base pointer. */
424 HOWTO (R_V850_CALLT_16_16_OFFSET, /* type */
425 0, /* rightshift */
426 1, /* size (0 = byte, 1 = short, 2 = long) */
427 16, /* bitsize */
428 false, /* pc_relative */
429 0, /* bitpos */
430 complain_overflow_dont, /* complain_on_overflow */
431 v850_elf_reloc, /* special_function */
432 "R_V850_CALLT_16_16_OFFSET", /* name */
433 false, /* partial_inplace */
434 0xffff, /* src_mask */
435 0xffff, /* dst_mask */
436 false), /* pcrel_offset */
437
438 /* end-sanitize-v850e */
439 /* GNU extension to record C++ vtable hierarchy */
440 HOWTO (R_V850_GNU_VTINHERIT, /* type */
441 0, /* rightshift */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
443 0, /* bitsize */
444 false, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_dont, /* complain_on_overflow */
447 NULL, /* special_function */
448 "R_V850_GNU_VTINHERIT", /* name */
449 false, /* partial_inplace */
450 0, /* src_mask */
451 0, /* dst_mask */
452 false), /* pcrel_offset */
453
454 /* GNU extension to record C++ vtable member usage */
455 HOWTO (R_V850_GNU_VTENTRY, /* type */
456 0, /* rightshift */
457 2, /* size (0 = byte, 1 = short, 2 = long) */
458 0, /* bitsize */
459 false, /* pc_relative */
460 0, /* bitpos */
461 complain_overflow_dont, /* complain_on_overflow */
462 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
463 "R_V850_GNU_VTENTRY", /* name */
464 false, /* partial_inplace */
465 0, /* src_mask */
466 0, /* dst_mask */
467 false), /* pcrel_offset */
468
469 };
470
471 /* Map BFD reloc types to V850 ELF reloc types. */
472
473 struct v850_elf_reloc_map
474 {
475 unsigned char bfd_reloc_val;
476 unsigned char elf_reloc_val;
477 };
478
479 static const struct v850_elf_reloc_map v850_elf_reloc_map[] =
480 {
481 { BFD_RELOC_NONE, R_V850_NONE },
482 { BFD_RELOC_V850_9_PCREL, R_V850_9_PCREL },
483 { BFD_RELOC_V850_22_PCREL, R_V850_22_PCREL },
484 { BFD_RELOC_HI16_S, R_V850_HI16_S },
485 { BFD_RELOC_HI16, R_V850_HI16 },
486 { BFD_RELOC_LO16, R_V850_LO16 },
487 { BFD_RELOC_32, R_V850_32 },
488 { BFD_RELOC_16, R_V850_16 },
489 { BFD_RELOC_8, R_V850_8 },
490 { BFD_RELOC_V850_SDA_16_16_OFFSET, R_V850_SDA_16_16_OFFSET },
491 { BFD_RELOC_V850_SDA_15_16_OFFSET, R_V850_SDA_15_16_OFFSET },
492 { BFD_RELOC_V850_ZDA_16_16_OFFSET, R_V850_ZDA_16_16_OFFSET },
493 { BFD_RELOC_V850_ZDA_15_16_OFFSET, R_V850_ZDA_15_16_OFFSET },
494 { BFD_RELOC_V850_TDA_6_8_OFFSET, R_V850_TDA_6_8_OFFSET },
495 { BFD_RELOC_V850_TDA_7_8_OFFSET, R_V850_TDA_7_8_OFFSET },
496 { BFD_RELOC_V850_TDA_7_7_OFFSET, R_V850_TDA_7_7_OFFSET },
497 { BFD_RELOC_V850_TDA_16_16_OFFSET, R_V850_TDA_16_16_OFFSET },
498 /* start-sanitize-v850e */
499 { BFD_RELOC_V850_TDA_4_5_OFFSET, R_V850_TDA_4_5_OFFSET },
500 { BFD_RELOC_V850_TDA_4_4_OFFSET, R_V850_TDA_4_4_OFFSET },
501 { BFD_RELOC_V850_SDA_16_16_SPLIT_OFFSET, R_V850_SDA_16_16_SPLIT_OFFSET },
502 { BFD_RELOC_V850_ZDA_16_16_SPLIT_OFFSET, R_V850_ZDA_16_16_SPLIT_OFFSET },
503 { BFD_RELOC_V850_CALLT_6_7_OFFSET, R_V850_CALLT_6_7_OFFSET },
504 { BFD_RELOC_V850_CALLT_16_16_OFFSET, R_V850_CALLT_16_16_OFFSET },
505 /* end-sanitize-v850e */
506 { BFD_RELOC_VTABLE_INHERIT, R_V850_GNU_VTINHERIT },
507 { BFD_RELOC_VTABLE_ENTRY, R_V850_GNU_VTENTRY },
508
509 };
510
511 \f
512 /* Map a bfd relocation into the appropriate howto structure */
513 static reloc_howto_type *
514 v850_elf_reloc_type_lookup (abfd, code)
515 bfd * abfd;
516 bfd_reloc_code_real_type code;
517 {
518 unsigned int i;
519
520 for (i = 0;
521 i < sizeof (v850_elf_reloc_map) / sizeof (struct v850_elf_reloc_map);
522 i++)
523 {
524 if (v850_elf_reloc_map[i].bfd_reloc_val == code)
525 {
526 BFD_ASSERT (v850_elf_howto_table[v850_elf_reloc_map[i].elf_reloc_val].type == v850_elf_reloc_map[i].elf_reloc_val);
527
528 return & v850_elf_howto_table[v850_elf_reloc_map[i].elf_reloc_val];
529 }
530 }
531
532 return NULL;
533 }
534
535 \f
536 /* Set the howto pointer for an V850 ELF reloc. */
537 static void
538 v850_elf_info_to_howto_rel (abfd, cache_ptr, dst)
539 bfd * abfd;
540 arelent * cache_ptr;
541 Elf32_Internal_Rel * dst;
542 {
543 unsigned int r_type;
544
545 r_type = ELF32_R_TYPE (dst->r_info);
546 BFD_ASSERT (r_type < (unsigned int) R_V850_max);
547 cache_ptr->howto = &v850_elf_howto_table[r_type];
548 }
549
550 /* Set the howto pointer for a V850 ELF reloc (type RELA). */
551 static void
552 v850_elf_info_to_howto_rela (abfd, cache_ptr, dst)
553 bfd * abfd;
554 arelent * cache_ptr;
555 Elf32_Internal_Rela *dst;
556 {
557 unsigned int r_type;
558
559 r_type = ELF32_R_TYPE (dst->r_info);
560 BFD_ASSERT (r_type < (unsigned int) R_V850_max);
561 cache_ptr->howto = &v850_elf_howto_table[r_type];
562 }
563
564 \f
565 /* Look through the relocs for a section during the first phase, and
566 allocate space in the global offset table or procedure linkage
567 table. */
568
569 static boolean
570 v850_elf_check_relocs (abfd, info, sec, relocs)
571 bfd * abfd;
572 struct bfd_link_info * info;
573 asection * sec;
574 const Elf_Internal_Rela * relocs;
575 {
576 boolean ret = true;
577 bfd *dynobj;
578 Elf_Internal_Shdr *symtab_hdr;
579 struct elf_link_hash_entry **sym_hashes;
580 const Elf_Internal_Rela *rel;
581 const Elf_Internal_Rela *rel_end;
582 asection *sreloc;
583 enum v850_reloc_type r_type;
584 int other = 0;
585 const char *common = (const char *)0;
586
587 if (info->relocateable)
588 return true;
589
590 #ifdef DEBUG
591 fprintf (stderr, "v850_elf_check_relocs called for section %s in %s\n",
592 bfd_get_section_name (abfd, sec),
593 bfd_get_filename (abfd));
594 #endif
595
596 dynobj = elf_hash_table (info)->dynobj;
597 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
598 sym_hashes = elf_sym_hashes (abfd);
599 sreloc = NULL;
600
601 rel_end = relocs + sec->reloc_count;
602 for (rel = relocs; rel < rel_end; rel++)
603 {
604 unsigned long r_symndx;
605 struct elf_link_hash_entry *h;
606
607 r_symndx = ELF32_R_SYM (rel->r_info);
608 if (r_symndx < symtab_hdr->sh_info)
609 h = NULL;
610 else
611 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
612
613 r_type = (enum v850_reloc_type) ELF32_R_TYPE (rel->r_info);
614 switch (r_type)
615 {
616 default:
617 case R_V850_NONE:
618 case R_V850_9_PCREL:
619 case R_V850_22_PCREL:
620 case R_V850_HI16_S:
621 case R_V850_HI16:
622 case R_V850_LO16:
623 case R_V850_32:
624 case R_V850_16:
625 case R_V850_8:
626 /* start-sanitize-v850e */
627 case R_V850_CALLT_6_7_OFFSET:
628 case R_V850_CALLT_16_16_OFFSET:
629 /* end-sanitize-v850e */
630 break;
631
632 /* This relocation describes the C++ object vtable hierarchy.
633 Reconstruct it for later use during GC. */
634 case R_V850_GNU_VTINHERIT:
635 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
636 return false;
637 break;
638
639 /* This relocation describes which C++ vtable entries are actually
640 used. Record for later use during GC. */
641 case R_V850_GNU_VTENTRY:
642 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
643 return false;
644 break;
645
646 /* start-sanitize-v850e */
647 case R_V850_SDA_16_16_SPLIT_OFFSET:
648 /* end-sanitize-v850e */
649 case R_V850_SDA_16_16_OFFSET:
650 case R_V850_SDA_15_16_OFFSET:
651 other = V850_OTHER_SDA;
652 common = ".scommon";
653 goto small_data_common;
654
655 /* start-sanitize-v850e */
656 case R_V850_ZDA_16_16_SPLIT_OFFSET:
657 /* end-sanitize-v850e */
658 case R_V850_ZDA_16_16_OFFSET:
659 case R_V850_ZDA_15_16_OFFSET:
660 other = V850_OTHER_ZDA;
661 common = ".zcommon";
662 goto small_data_common;
663
664 /* start-sanitize-v850e */
665 case R_V850_TDA_4_5_OFFSET:
666 case R_V850_TDA_4_4_OFFSET:
667 /* end-sanitize-v850e */
668 case R_V850_TDA_6_8_OFFSET:
669 case R_V850_TDA_7_8_OFFSET:
670 case R_V850_TDA_7_7_OFFSET:
671 case R_V850_TDA_16_16_OFFSET:
672 other = V850_OTHER_TDA;
673 common = ".tcommon";
674 /* fall through */
675
676 #define V850_OTHER_MASK (V850_OTHER_TDA | V850_OTHER_SDA | V850_OTHER_ZDA)
677
678 small_data_common:
679 if (h)
680 {
681 h->other |= other; /* flag which type of relocation was used */
682 if ((h->other & V850_OTHER_MASK) != (other & V850_OTHER_MASK)
683 && (h->other & V850_OTHER_ERROR) == 0)
684 {
685 const char * msg;
686 static char buff[200]; /* XXX */
687
688 switch (h->other & V850_OTHER_MASK)
689 {
690 default:
691 msg = _("Variable `%s' cannot occupy in multiple small data regions");
692 break;
693 case V850_OTHER_SDA | V850_OTHER_ZDA | V850_OTHER_TDA:
694 msg = _("Variable `%s' can only be in one of the small, zero, and tiny data regions");
695 break;
696 case V850_OTHER_SDA | V850_OTHER_ZDA:
697 msg = _("Variable `%s' cannot be in both small and zero data regions simultaneously");
698 break;
699 case V850_OTHER_SDA | V850_OTHER_TDA:
700 msg = _("Variable `%s' cannot be in both small and tiny data regions simultaneously");
701 break;
702 case V850_OTHER_ZDA | V850_OTHER_TDA:
703 msg = _("Variable `%s' cannot be in both zero and tiny data regions simultaneously");
704 break;
705 }
706
707 sprintf (buff, msg, h->root.root.string);
708 info->callbacks->warning (info, buff, h->root.root.string,
709 abfd, h->root.u.def.section, 0);
710
711 bfd_set_error (bfd_error_bad_value);
712 h->other |= V850_OTHER_ERROR;
713 ret = false;
714 }
715 }
716
717 if (h && h->root.type == bfd_link_hash_common
718 && h->root.u.c.p
719 && !strcmp (bfd_get_section_name (abfd, h->root.u.c.p->section), "COMMON"))
720 {
721 asection *section = h->root.u.c.p->section = bfd_make_section_old_way (abfd, common);
722 section->flags |= SEC_IS_COMMON;
723 }
724
725 #ifdef DEBUG
726 fprintf (stderr, "v850_elf_check_relocs, found %s relocation for %s%s\n",
727 v850_elf_howto_table[ (int)r_type ].name,
728 (h && h->root.root.string) ? h->root.root.string : "<unknown>",
729 (h->root.type == bfd_link_hash_common) ? ", symbol is common" : "");
730 #endif
731 break;
732 }
733 }
734
735 return ret;
736 }
737
738 typedef struct hi16s_location
739 {
740 bfd_vma addend;
741 bfd_byte * address;
742 unsigned long counter;
743 struct hi16s_location * next;
744 }
745 hi16s_location;
746
747 static hi16s_location * previous_hi16s;
748 static hi16s_location * free_hi16s;
749 static unsigned long hi16s_counter;
750
751 static void
752 remember_hi16s_reloc (abfd, addend, address)
753 bfd * abfd;
754 bfd_vma addend;
755 bfd_byte * address;
756 {
757 hi16s_location * entry = NULL;
758
759 /* Find a free structure. */
760 if (free_hi16s == NULL)
761 free_hi16s = (hi16s_location *) bfd_zalloc (abfd, sizeof (* free_hi16s));
762
763 entry = free_hi16s;
764 free_hi16s = free_hi16s->next;
765
766 entry->addend = addend;
767 entry->address = address;
768 entry->counter = hi16s_counter ++;
769 entry->next = previous_hi16s;
770 previous_hi16s = entry;
771
772 /* Cope with wrap around of our counter. */
773 if (hi16s_counter == 0)
774 {
775 /* XXX - Assume that all counter entries differ only in their low 16 bits. */
776 for (entry = previous_hi16s; entry != NULL; entry = entry->next)
777 entry->counter &= 0xffff;
778
779 hi16s_counter = 0x10000;
780 }
781
782 return;
783 }
784
785 static bfd_byte *
786 find_remembered_hi16s_reloc (addend)
787 bfd_vma addend;
788 {
789 hi16s_location * match = NULL;
790 hi16s_location * entry;
791 hi16s_location * previous = NULL;
792 hi16s_location * prev;
793 int i;
794 bfd_byte * addr;
795
796 /* Search the table. Record the most recent entry that matches. */
797 for (entry = previous_hi16s; entry; entry = entry->next)
798 {
799 if (entry->addend == addend)
800 {
801 if (match == NULL || match->counter < entry->counter)
802 {
803 previous = prev;
804 match = entry;
805 }
806 }
807
808 prev = entry;
809 }
810
811 if (match == NULL)
812 return NULL;
813
814 /* Extract the address. */
815 addr = match->address;
816
817 /* Attach the entry to the free list. */
818 if (previous)
819 previous->next = match->next;
820 else
821 previous_hi16s = match->next;
822
823 match->next = free_hi16s->next;
824 free_hi16s = match;
825
826 match->addend = 0;
827 match->address = NULL;
828
829 return addr;
830 }
831
832 /* FIXME: The code here probably ought to be removed and the code in reloc.c
833 allowed to do its stuff instead. At least for most of the relocs, anwyay. */
834 static bfd_reloc_status_type
835 v850_elf_perform_relocation (abfd, r_type, addend, address)
836 bfd * abfd;
837 int r_type;
838 bfd_vma addend;
839 bfd_byte * address;
840 {
841 unsigned long insn;
842 bfd_signed_vma saddend = (bfd_signed_vma) addend;
843
844 switch (r_type)
845 {
846 default:
847 /* fprintf (stderr, "reloc type %d not SUPPORTED\n", r_type ); */
848 return bfd_reloc_notsupported;
849
850 case R_V850_32:
851 bfd_put_32 (abfd, addend, address);
852 return bfd_reloc_ok;
853
854 case R_V850_22_PCREL:
855 if (saddend > 0x1fffff || saddend < -0x200000)
856 return bfd_reloc_overflow;
857
858 if ((addend % 2) != 0)
859 return bfd_reloc_dangerous;
860
861 insn = bfd_get_32 (abfd, address);
862 insn &= ~0xfffe003f;
863 insn |= (((addend & 0xfffe) << 16) | ((addend & 0x3f0000) >> 16));
864 bfd_put_32 (abfd, insn, address);
865 return bfd_reloc_ok;
866
867 case R_V850_9_PCREL:
868 if (saddend > 0xff || saddend < -0x100)
869 return bfd_reloc_overflow;
870
871 if ((addend % 2) != 0)
872 return bfd_reloc_dangerous;
873
874 insn = bfd_get_16 (abfd, address);
875 insn &= ~ 0xf870;
876 insn |= ((addend & 0x1f0) << 7) | ((addend & 0x0e) << 3);
877 break;
878
879 case R_V850_HI16:
880 addend += (bfd_get_16 (abfd, address) << 16);
881 addend = (addend >> 16);
882 insn = addend;
883 break;
884
885 case R_V850_HI16_S:
886 /* Remember where this relocation took place. */
887 remember_hi16s_reloc (abfd, addend, address);
888
889 addend += (bfd_get_16 (abfd, address) << 16);
890 addend = (addend >> 16) + ((addend & 0x8000) != 0);
891
892 /* This relocation cannot overflow. */
893 if (addend > 0x7fff)
894 addend = 0;
895
896 insn = addend;
897 break;
898
899 case R_V850_LO16:
900 /* Calculate the sum of the value stored in the instruction and the
901 addend and check for overflow from the low 16 bits into the high
902 16 bits. The assembler has already done some of this: If the
903 value stored in the instruction has its 15th bit set, (counting
904 from zero) then the assembler will have added 1 to the value
905 stored in the associated HI16S reloc. So for example, these
906 relocations:
907
908 movhi hi( fred ), r0, r1
909 movea lo( fred ), r1, r1
910
911 will store 0 in the value fields for the MOVHI and MOVEA instructions
912 and addend will be the address of fred, but for these instructions:
913
914 movhi hi( fred + 0x123456), r0, r1
915 movea lo( fred + 0x123456), r1, r1
916
917 the value stored in the MOVHI instruction will be 0x12 and the value
918 stored in the MOVEA instruction will be 0x3456. If however the
919 instructions were:
920
921 movhi hi( fred + 0x10ffff), r0, r1
922 movea lo( fred + 0x10ffff), r1, r1
923
924 then the value stored in the MOVHI instruction would be 0x11 (not
925 0x10) and the value stored in the MOVEA instruction would be 0xffff.
926 Thus (assuming for the moment that the addend is 0), at run time the
927 MOVHI instruction loads 0x110000 into r1, then the MOVEA instruction
928 adds 0xffffffff (sign extension!) producing 0x10ffff. Similarly if
929 the instructions were:
930
931 movhi hi( fred - 1), r0, r1
932 movea lo( fred - 1), r1, r1
933
934 then 0 is stored in the MOVHI instruction and -1 is stored in the
935 MOVEA instruction.
936
937 Overflow can occur if the addition of the value stored in the
938 instruction plus the addend sets the 15th bit when before it was clear.
939 This is because the 15th bit will be sign extended into the high part,
940 thus reducing its value by one, but since the 15th bit was originally
941 clear, the assembler will not have added 1 to the previous HI16S reloc
942 to compensate for this effect. For example:
943
944 movhi hi( fred + 0x123456), r0, r1
945 movea lo( fred + 0x123456), r1, r1
946
947 The value stored in HI16S reloc is 0x12, the value stored in the LO16
948 reloc is 0x3456. If we assume that the address of fred is 0x00007000
949 then the relocations become:
950
951 HI16S: 0x0012 + (0x00007000 >> 16) = 0x12
952 LO16: 0x3456 + (0x00007000 & 0xffff) = 0xa456
953
954 but when the instructions are executed, the MOVEA instruction's value
955 is signed extended, so the sum becomes:
956
957 0x00120000
958 + 0xffffa456
959 ------------
960 0x0011a456 but 'fred + 0x123456' = 0x0012a456
961
962 Note that if the 15th bit was set in the value stored in the LO16
963 reloc, then we do not have to do anything:
964
965 movhi hi( fred + 0x10ffff), r0, r1
966 movea lo( fred + 0x10ffff), r1, r1
967
968 HI16S: 0x0011 + (0x00007000 >> 16) = 0x11
969 LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff
970
971 0x00110000
972 + 0x00006fff
973 ------------
974 0x00116fff = fred + 0x10ffff = 0x7000 + 0x10ffff
975
976
977 Overflow can also occur if the computation carries into the 16th bit
978 and it also results in the 15th bit having the same value as the 15th
979 bit of the original value. What happens is that the HI16S reloc
980 will have already examined the 15th bit of the original value and
981 added 1 to the high part if the bit is set. This compensates for the
982 sign extension of 15th bit of the result of the computation. But now
983 there is a carry into the 16th bit, and this has not been allowed for.
984
985 So, for example if fred is at address 0xf000:
986
987 movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set]
988 movea lo( fred + 0xffff), r1, r1
989
990 HI16S: 0x0001 + (0x0000f000 >> 16) = 0x0001
991 LO16: 0xffff + (0x0000f000 & 0xffff) = 0xefff (carry into bit 16 is lost)
992
993 0x00010000
994 + 0xffffefff
995 ------------
996 0x0000efff but 'fred + 0xffff' = 0x0001efff
997
998 Similarly, if the 15th bit remains clear, but overflow occurs into
999 the 16th bit then (assuming the address of fred is 0xf000):
1000
1001 movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear]
1002 movea lo( fred + 0x7000), r1, r1
1003
1004 HI16S: 0x0000 + (0x0000f000 >> 16) = 0x0000
1005 LO16: 0x7000 + (0x0000f000 & 0xffff) = 0x6fff (carry into bit 16 is lost)
1006
1007 0x00000000
1008 + 0x00006fff
1009 ------------
1010 0x00006fff but 'fred + 0x7000' = 0x00016fff
1011
1012 Note - there is no need to change anything if a carry occurs, and the
1013 15th bit changes its value from being set to being clear, as the HI16S
1014 reloc will have already added in 1 to the high part for us:
1015
1016 movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set]
1017 movea lo( fred + 0xffff), r1, r1
1018
1019 HI16S: 0x0001 + (0x00007000 >> 16)
1020 LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff (carry into bit 16 is lost)
1021
1022 0x00010000
1023 + 0x00006fff (bit 15 not set, so the top half is zero)
1024 ------------
1025 0x00016fff which is right (assuming that fred is at 0x7000)
1026
1027 but if the 15th bit goes from being clear to being set, then we must
1028 once again handle overflow:
1029
1030 movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear]
1031 movea lo( fred + 0x7000), r1, r1
1032
1033 HI16S: 0x0000 + (0x0000ffff >> 16)
1034 LO16: 0x7000 + (0x0000ffff & 0xffff) = 0x6fff (carry into bit 16)
1035
1036 0x00000000
1037 + 0x00006fff (bit 15 not set, so the top half is zero)
1038 ------------
1039 0x00006fff which is wrong (assuming that fred is at 0xffff)
1040 */
1041
1042 {
1043 long result;
1044
1045 insn = bfd_get_16 (abfd, address);
1046 result = insn + addend;
1047
1048 #define BIT15_SET(x) ((x) & 0x8000)
1049 #define OVERFLOWS(a,i) ((((a) & 0xffff) + (i)) > 0xffff)
1050
1051 if ((BIT15_SET (result) && ! BIT15_SET (addend))
1052 || (OVERFLOWS (addend, insn)
1053 && ((! BIT15_SET (insn)) || (BIT15_SET (addend)))))
1054 {
1055 bfd_byte * hi16s_address = find_remembered_hi16s_reloc (addend);
1056
1057 /* Amend the matching HI16_S relocation. */
1058 if (hi16s_address != NULL)
1059 {
1060 insn = bfd_get_16 (abfd, hi16s_address);
1061 insn += 1;
1062 bfd_put_16 (abfd, insn, hi16s_address);
1063 }
1064 else
1065 {
1066 fprintf (stderr, _("FAILED to find previous HI16 reloc\n"));
1067 return bfd_reloc_overflow;
1068 }
1069 }
1070
1071 /* Do not complain if value has top bit set, as this has been anticipated. */
1072 insn = result & 0xffff;
1073 break;
1074 }
1075
1076 case R_V850_8:
1077 addend += (char) bfd_get_8 (abfd, address);
1078
1079 saddend = (bfd_signed_vma) addend;
1080
1081 if (saddend > 0x7f || saddend < -0x80)
1082 return bfd_reloc_overflow;
1083
1084 bfd_put_8 (abfd, addend, address);
1085 return bfd_reloc_ok;
1086
1087 /* start-sanitize-v850e */
1088 case R_V850_CALLT_16_16_OFFSET:
1089 addend += bfd_get_16 (abfd, address);
1090
1091 saddend = (bfd_signed_vma) addend;
1092
1093 if (saddend > 0xffff || saddend < 0)
1094 return bfd_reloc_overflow;
1095
1096 insn = addend;
1097 break;
1098 /* end-sanitize-v850e */
1099
1100 case R_V850_16:
1101
1102 /* drop through */
1103 case R_V850_SDA_16_16_OFFSET:
1104 case R_V850_ZDA_16_16_OFFSET:
1105 case R_V850_TDA_16_16_OFFSET:
1106 addend += bfd_get_16 (abfd, address);
1107
1108 saddend = (bfd_signed_vma) addend;
1109
1110 if (saddend > 0x7fff || saddend < -0x8000)
1111 return bfd_reloc_overflow;
1112
1113 insn = addend;
1114 break;
1115
1116 case R_V850_SDA_15_16_OFFSET:
1117 case R_V850_ZDA_15_16_OFFSET:
1118 insn = bfd_get_16 (abfd, address);
1119 addend += (insn & 0xfffe);
1120
1121 saddend = (bfd_signed_vma) addend;
1122
1123 if (saddend > 0x7ffe || saddend < -0x8000)
1124 return bfd_reloc_overflow;
1125
1126 if (addend & 1)
1127 return bfd_reloc_dangerous;
1128
1129 insn = (addend & ~1) | (insn & 1);
1130 break;
1131
1132 case R_V850_TDA_6_8_OFFSET:
1133 insn = bfd_get_16 (abfd, address);
1134 addend += ((insn & 0x7e) << 1);
1135
1136 saddend = (bfd_signed_vma) addend;
1137
1138 if (saddend > 0xfc || saddend < 0)
1139 return bfd_reloc_overflow;
1140
1141 if (addend & 3)
1142 return bfd_reloc_dangerous;
1143
1144 insn &= 0xff81;
1145 insn |= (addend >> 1);
1146 break;
1147
1148 case R_V850_TDA_7_8_OFFSET:
1149 insn = bfd_get_16 (abfd, address);
1150 addend += ((insn & 0x7f) << 1);
1151
1152 saddend = (bfd_signed_vma) addend;
1153
1154 if (saddend > 0xfe || saddend < 0)
1155 return bfd_reloc_overflow;
1156
1157 if (addend & 1)
1158 return bfd_reloc_dangerous;
1159
1160 insn &= 0xff80;
1161 insn |= (addend >> 1);
1162 break;
1163
1164 case R_V850_TDA_7_7_OFFSET:
1165 insn = bfd_get_16 (abfd, address);
1166 addend += insn & 0x7f;
1167
1168 saddend = (bfd_signed_vma) addend;
1169
1170 if (saddend > 0x7f || saddend < 0)
1171 return bfd_reloc_overflow;
1172
1173 insn &= 0xff80;
1174 insn |= addend;
1175 break;
1176
1177 /* start-sanitize-v850e */
1178 case R_V850_TDA_4_5_OFFSET:
1179 insn = bfd_get_16 (abfd, address);
1180 addend += ((insn & 0xf) << 1);
1181
1182 saddend = (bfd_signed_vma) addend;
1183
1184 if (saddend > 0x1e || saddend < 0)
1185 return bfd_reloc_overflow;
1186
1187 if (addend & 1)
1188 return bfd_reloc_dangerous;
1189
1190 insn &= 0xfff0;
1191 insn |= (addend >> 1);
1192 break;
1193
1194 case R_V850_TDA_4_4_OFFSET:
1195 insn = bfd_get_16 (abfd, address);
1196 addend += insn & 0xf;
1197
1198 saddend = (bfd_signed_vma) addend;
1199
1200 if (saddend > 0xf || saddend < 0)
1201 return bfd_reloc_overflow;
1202
1203 insn &= 0xfff0;
1204 insn |= addend;
1205 break;
1206
1207 case R_V850_ZDA_16_16_SPLIT_OFFSET:
1208 case R_V850_SDA_16_16_SPLIT_OFFSET:
1209 insn = bfd_get_32 (abfd, address);
1210 addend += ((insn & 0xfffe0000) >> 16) + ((insn & 0x20) >> 5);
1211
1212 saddend = (bfd_signed_vma) addend;
1213
1214 if (saddend > 0x7fff || saddend < -0x8000)
1215 return bfd_reloc_overflow;
1216
1217 insn &= 0x0001ffdf;
1218 insn |= (addend & 1) << 5;
1219 insn |= (addend & ~1) << 16;
1220
1221 bfd_put_32 (abfd, insn, address);
1222 return bfd_reloc_ok;
1223
1224 case R_V850_CALLT_6_7_OFFSET:
1225 insn = bfd_get_16 (abfd, address);
1226 addend += ((insn & 0x3f) << 1);
1227
1228 saddend = (bfd_signed_vma) addend;
1229
1230 if (saddend > 0x7e || 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 /* end-sanitize-v850e */
1240
1241 case R_V850_GNU_VTINHERIT:
1242 case R_V850_GNU_VTENTRY:
1243 return bfd_reloc_ok;
1244
1245 }
1246
1247 bfd_put_16 (abfd, insn, address);
1248 return bfd_reloc_ok;
1249 }
1250
1251 \f
1252 /* Insert the addend into the instruction. */
1253 static bfd_reloc_status_type
1254 v850_elf_reloc (abfd, reloc, symbol, data, isection, obfd, err)
1255 bfd * abfd;
1256 arelent * reloc;
1257 asymbol * symbol;
1258 PTR data;
1259 asection * isection;
1260 bfd * obfd;
1261 char ** err;
1262 {
1263 long relocation;
1264
1265 /* If there is an output BFD,
1266 and the symbol is not a section name (which is only defined at final link time),
1267 and either we are not putting the addend into the instruction
1268 or the addend is zero, so there is nothing to add into the instruction
1269 then just fixup the address and return. */
1270 if (obfd != (bfd *) NULL
1271 && (symbol->flags & BSF_SECTION_SYM) == 0
1272 && (! reloc->howto->partial_inplace
1273 || reloc->addend == 0))
1274 {
1275 reloc->address += isection->output_offset;
1276 return bfd_reloc_ok;
1277 }
1278 #if 0
1279 else if (obfd != NULL)
1280 {
1281 return bfd_reloc_continue;
1282 }
1283 #endif
1284
1285 /* Catch relocs involving undefined symbols. */
1286 if (bfd_is_und_section (symbol->section)
1287 && (symbol->flags & BSF_WEAK) == 0
1288 && obfd == NULL)
1289 return bfd_reloc_undefined;
1290
1291 /* We handle final linking of some relocs ourselves. */
1292
1293 /* Is the address of the relocation really within the section? */
1294 if (reloc->address > isection->_cooked_size)
1295 return bfd_reloc_outofrange;
1296
1297 /* Work out which section the relocation is targetted at and the
1298 initial relocation command value. */
1299
1300 /* Get symbol value. (Common symbols are special.) */
1301 if (bfd_is_com_section (symbol->section))
1302 relocation = 0;
1303 else
1304 relocation = symbol->value;
1305
1306 /* Convert input-section-relative symbol value to absolute + addend. */
1307 relocation += symbol->section->output_section->vma;
1308 relocation += symbol->section->output_offset;
1309 relocation += reloc->addend;
1310
1311 if (reloc->howto->pc_relative == true)
1312 {
1313 /* Here the variable relocation holds the final address of the
1314 symbol we are relocating against, plus any addend. */
1315 relocation -= isection->output_section->vma + isection->output_offset;
1316
1317 /* Deal with pcrel_offset */
1318 relocation -= reloc->address;
1319 }
1320
1321 reloc->addend = relocation;
1322 return bfd_reloc_ok;
1323 }
1324
1325 \f
1326 /*ARGSUSED*/
1327 static boolean
1328 v850_elf_is_local_label_name (abfd, name)
1329 bfd * abfd;
1330 const char * name;
1331 {
1332 return ( (name[0] == '.' && (name[1] == 'L' || name[1] == '.'))
1333 || (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_'));
1334 }
1335
1336 \f
1337 /* Perform a relocation as part of a final link. */
1338 static bfd_reloc_status_type
1339 v850_elf_final_link_relocate (howto, input_bfd, output_bfd,
1340 input_section, contents, offset, value,
1341 addend, info, sym_sec, is_local)
1342 reloc_howto_type * howto;
1343 bfd * input_bfd;
1344 bfd * output_bfd;
1345 asection * input_section;
1346 bfd_byte * contents;
1347 bfd_vma offset;
1348 bfd_vma value;
1349 bfd_vma addend;
1350 struct bfd_link_info * info;
1351 asection * sym_sec;
1352 int is_local;
1353 {
1354 unsigned long r_type = howto->type;
1355 bfd_byte * hit_data = contents + offset;
1356
1357 /* Adjust the value according to the relocation. */
1358 switch (r_type)
1359 {
1360 case R_V850_9_PCREL:
1361 value -= (input_section->output_section->vma
1362 + input_section->output_offset);
1363 value -= offset;
1364 break;
1365
1366 case R_V850_22_PCREL:
1367 value -= (input_section->output_section->vma
1368 + input_section->output_offset
1369 + offset);
1370
1371 value = SEXT24 (value); /* Only the bottom 24 bits of the PC are valid */
1372 break;
1373
1374 case R_V850_HI16_S:
1375 case R_V850_HI16:
1376 case R_V850_LO16:
1377 case R_V850_16:
1378 case R_V850_32:
1379 case R_V850_8:
1380 break;
1381
1382 case R_V850_ZDA_15_16_OFFSET:
1383 case R_V850_ZDA_16_16_OFFSET:
1384 /* start-sanitize-v850e */
1385 case R_V850_ZDA_16_16_SPLIT_OFFSET:
1386 /* end-sanitize-v850e */
1387 if (sym_sec == NULL)
1388 return bfd_reloc_undefined;
1389
1390 value -= sym_sec->output_section->vma;
1391 break;
1392
1393 case R_V850_SDA_15_16_OFFSET:
1394 case R_V850_SDA_16_16_OFFSET:
1395 /* start-sanitize-v850e */
1396 case R_V850_SDA_16_16_SPLIT_OFFSET:
1397 /* end-sanitize-v850e */
1398 {
1399 unsigned long gp;
1400 struct bfd_link_hash_entry * h;
1401
1402 if (sym_sec == NULL)
1403 return bfd_reloc_undefined;
1404
1405 /* Get the value of __gp. */
1406 h = bfd_link_hash_lookup (info->hash, "__gp", false, false, true);
1407 if (h == (struct bfd_link_hash_entry *) NULL
1408 || h->type != bfd_link_hash_defined)
1409 return bfd_reloc_other;
1410
1411 gp = (h->u.def.value
1412 + h->u.def.section->output_section->vma
1413 + h->u.def.section->output_offset);
1414
1415 value -= sym_sec->output_section->vma;
1416 value -= (gp - sym_sec->output_section->vma);
1417 }
1418 break;
1419
1420 /* start-sanitize-v850e */
1421 case R_V850_TDA_4_4_OFFSET:
1422 case R_V850_TDA_4_5_OFFSET:
1423 /* end-sanitize-v850e */
1424 case R_V850_TDA_16_16_OFFSET:
1425 case R_V850_TDA_7_7_OFFSET:
1426 case R_V850_TDA_7_8_OFFSET:
1427 case R_V850_TDA_6_8_OFFSET:
1428 {
1429 unsigned long ep;
1430 struct bfd_link_hash_entry * h;
1431
1432 /* Get the value of __ep. */
1433 h = bfd_link_hash_lookup (info->hash, "__ep", false, false, true);
1434 if (h == (struct bfd_link_hash_entry *) NULL
1435 || h->type != bfd_link_hash_defined)
1436 return bfd_reloc_continue; /* Actually this indicates that __ep could not be found. */
1437
1438 ep = (h->u.def.value
1439 + h->u.def.section->output_section->vma
1440 + h->u.def.section->output_offset);
1441
1442 value -= ep;
1443 }
1444 break;
1445
1446 /* start-sanitize-v850e */
1447 case R_V850_CALLT_6_7_OFFSET:
1448 {
1449 unsigned long ctbp;
1450 struct bfd_link_hash_entry * h;
1451
1452 /* Get the value of __ctbp. */
1453 h = bfd_link_hash_lookup (info->hash, "__ctbp", false, false, true);
1454 if (h == (struct bfd_link_hash_entry *) NULL
1455 || h->type != bfd_link_hash_defined)
1456 return (bfd_reloc_dangerous + 1); /* Actually this indicates that __ctbp could not be found. */
1457
1458 ctbp = (h->u.def.value
1459 + h->u.def.section->output_section->vma
1460 + h->u.def.section->output_offset);
1461 value -= ctbp;
1462 }
1463 break;
1464
1465 case R_V850_CALLT_16_16_OFFSET:
1466 {
1467 unsigned long ctbp;
1468 struct bfd_link_hash_entry * h;
1469
1470 if (sym_sec == NULL)
1471 return bfd_reloc_undefined;
1472
1473 /* Get the value of __ctbp. */
1474 h = bfd_link_hash_lookup (info->hash, "__ctbp", false, false, true);
1475 if (h == (struct bfd_link_hash_entry *) NULL
1476 || h->type != bfd_link_hash_defined)
1477 return (bfd_reloc_dangerous + 1);
1478
1479 ctbp = (h->u.def.value
1480 + h->u.def.section->output_section->vma
1481 + h->u.def.section->output_offset);
1482
1483 value -= sym_sec->output_section->vma;
1484 value -= (ctbp - sym_sec->output_section->vma);
1485 }
1486 break;
1487 /* end-sanitize-v850e */
1488
1489 case R_V850_NONE:
1490 case R_V850_GNU_VTINHERIT:
1491 case R_V850_GNU_VTENTRY:
1492 return bfd_reloc_ok;
1493
1494 default:
1495 return bfd_reloc_notsupported;
1496 }
1497
1498 /* Perform the relocation. */
1499 return v850_elf_perform_relocation (input_bfd, r_type, value + addend, hit_data);
1500 }
1501
1502 \f
1503 /* Relocate an V850 ELF section. */
1504 static boolean
1505 v850_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1506 contents, relocs, local_syms, local_sections)
1507 bfd * output_bfd;
1508 struct bfd_link_info * info;
1509 bfd * input_bfd;
1510 asection * input_section;
1511 bfd_byte * contents;
1512 Elf_Internal_Rela * relocs;
1513 Elf_Internal_Sym * local_syms;
1514 asection ** local_sections;
1515 {
1516 Elf_Internal_Shdr * symtab_hdr;
1517 struct elf_link_hash_entry ** sym_hashes;
1518 Elf_Internal_Rela * rel;
1519 Elf_Internal_Rela * relend;
1520
1521 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1522 sym_hashes = elf_sym_hashes (input_bfd);
1523
1524 rel = relocs;
1525 relend = relocs + input_section->reloc_count;
1526 for (; rel < relend; rel++)
1527 {
1528 int r_type;
1529 reloc_howto_type * howto;
1530 unsigned long r_symndx;
1531 Elf_Internal_Sym * sym;
1532 asection * sec;
1533 struct elf_link_hash_entry * h;
1534 bfd_vma relocation;
1535 bfd_reloc_status_type r;
1536
1537 r_symndx = ELF32_R_SYM (rel->r_info);
1538 r_type = ELF32_R_TYPE (rel->r_info);
1539
1540 if (r_type == R_V850_GNU_VTENTRY
1541 || r_type == R_V850_GNU_VTINHERIT)
1542 continue;
1543
1544 howto = v850_elf_howto_table + r_type;
1545
1546 if (info->relocateable)
1547 {
1548 /* This is a relocateable link. We don't have to change
1549 anything, unless the reloc is against a section symbol,
1550 in which case we have to adjust according to where the
1551 section symbol winds up in the output section. */
1552 if (r_symndx < symtab_hdr->sh_info)
1553 {
1554 sym = local_syms + r_symndx;
1555 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1556 {
1557 sec = local_sections[r_symndx];
1558 rel->r_addend += sec->output_offset + sym->st_value;
1559 }
1560 }
1561
1562 continue;
1563 }
1564
1565 /* This is a final link. */
1566 h = NULL;
1567 sym = NULL;
1568 sec = NULL;
1569 if (r_symndx < symtab_hdr->sh_info)
1570 {
1571 sym = local_syms + r_symndx;
1572 sec = local_sections[r_symndx];
1573 relocation = (sec->output_section->vma
1574 + sec->output_offset
1575 + sym->st_value);
1576 #if 0
1577 {
1578 char * name;
1579 name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, sym->st_name);
1580 name = (name == NULL) ? "<none>" : name;
1581 fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
1582 sec->name, name, sym->st_name,
1583 sec->output_section->vma, sec->output_offset, sym->st_value, rel->r_addend);
1584 }
1585 #endif
1586 }
1587 else
1588 {
1589 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1590
1591 while (h->root.type == bfd_link_hash_indirect
1592 || h->root.type == bfd_link_hash_warning)
1593 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1594
1595 if (h->root.type == bfd_link_hash_defined
1596 || h->root.type == bfd_link_hash_defweak)
1597 {
1598 sec = h->root.u.def.section;
1599 relocation = (h->root.u.def.value
1600 + sec->output_section->vma
1601 + sec->output_offset);
1602 #if 0
1603 fprintf (stderr, "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n",
1604 sec->name, h->root.root.string, h->root.u.def.value, sec->output_section->vma, sec->output_offset, relocation);
1605 #endif
1606 }
1607 else if (h->root.type == bfd_link_hash_undefweak)
1608 {
1609 #if 0
1610 fprintf (stderr, "undefined: sec: %s, name: %s\n",
1611 sec->name, h->root.root.string);
1612 #endif
1613 relocation = 0;
1614 }
1615 else
1616 {
1617 if (! ((*info->callbacks->undefined_symbol)
1618 (info, h->root.root.string, input_bfd,
1619 input_section, rel->r_offset)))
1620 return false;
1621 #if 0
1622 fprintf (stderr, "unknown: name: %s\n", h->root.root.string);
1623 #endif
1624 relocation = 0;
1625 }
1626 }
1627
1628 /* FIXME: We should use the addend, but the COFF relocations
1629 don't. */
1630 r = v850_elf_final_link_relocate (howto, input_bfd, output_bfd,
1631 input_section,
1632 contents, rel->r_offset,
1633 relocation, rel->r_addend,
1634 info, sec, h == NULL);
1635
1636 if (r != bfd_reloc_ok)
1637 {
1638 const char * name;
1639 const char * msg = (const char *)0;
1640
1641 if (h != NULL)
1642 name = h->root.root.string;
1643 else
1644 {
1645 name = (bfd_elf_string_from_elf_section
1646 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1647 if (name == NULL || *name == '\0')
1648 name = bfd_section_name (input_bfd, sec);
1649 }
1650
1651 switch (r)
1652 {
1653 case bfd_reloc_overflow:
1654 if (! ((*info->callbacks->reloc_overflow)
1655 (info, name, howto->name, (bfd_vma) 0,
1656 input_bfd, input_section, rel->r_offset)))
1657 return false;
1658 break;
1659
1660 case bfd_reloc_undefined:
1661 if (! ((*info->callbacks->undefined_symbol)
1662 (info, name, input_bfd, input_section,
1663 rel->r_offset)))
1664 return false;
1665 break;
1666
1667 case bfd_reloc_outofrange:
1668 msg = _("internal error: out of range error");
1669 goto common_error;
1670
1671 case bfd_reloc_notsupported:
1672 msg = _("internal error: unsupported relocation error");
1673 goto common_error;
1674
1675 case bfd_reloc_dangerous:
1676 msg = _("internal error: dangerous relocation");
1677 goto common_error;
1678
1679 case bfd_reloc_other:
1680 msg = _("could not locate special linker symbol __gp");
1681 goto common_error;
1682
1683 case bfd_reloc_continue:
1684 msg = _("could not locate special linker symbol __ep");
1685 goto common_error;
1686
1687 case (bfd_reloc_dangerous + 1):
1688 msg = _("could not locate special linker symbol __ctbp");
1689 goto common_error;
1690
1691 default:
1692 msg = _("internal error: unknown error");
1693 /* fall through */
1694
1695 common_error:
1696 if (!((*info->callbacks->warning)
1697 (info, msg, name, input_bfd, input_section,
1698 rel->r_offset)))
1699 return false;
1700 break;
1701 }
1702 }
1703 }
1704
1705 return true;
1706 }
1707
1708 static boolean
1709 v850_elf_gc_sweep_hook (abfd, info, sec, relocs)
1710 bfd *abfd;
1711 struct bfd_link_info *info;
1712 asection *sec;
1713 const Elf_Internal_Rela *relocs;
1714 {
1715 /* No got and plt entries for v850-elf */
1716 return true;
1717 }
1718
1719 static asection *
1720 v850_elf_gc_mark_hook (abfd, info, rel, h, sym)
1721 bfd *abfd;
1722 struct bfd_link_info *info;
1723 Elf_Internal_Rela *rel;
1724 struct elf_link_hash_entry *h;
1725 Elf_Internal_Sym *sym;
1726 {
1727 if (h != NULL)
1728 {
1729 switch (ELF32_R_TYPE (rel->r_info))
1730 {
1731 case R_V850_GNU_VTINHERIT:
1732 case R_V850_GNU_VTENTRY:
1733 break;
1734
1735 default:
1736 switch (h->root.type)
1737 {
1738 case bfd_link_hash_defined:
1739 case bfd_link_hash_defweak:
1740 return h->root.u.def.section;
1741
1742 case bfd_link_hash_common:
1743 return h->root.u.c.p->section;
1744 }
1745 }
1746 }
1747 else
1748 {
1749 if (!(elf_bad_symtab (abfd)
1750 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
1751 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
1752 && sym->st_shndx != SHN_COMMON))
1753 {
1754 return bfd_section_from_elf_index (abfd, sym->st_shndx);
1755 }
1756 }
1757 return NULL;
1758 }
1759 /* Set the right machine number. */
1760 static boolean
1761 v850_elf_object_p (abfd)
1762 bfd *abfd;
1763 {
1764 switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH)
1765 {
1766 default:
1767 case E_V850_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, 0); break;
1768 /* start-sanitize-v850e */
1769 case E_V850E_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850e); break;
1770 case E_V850EA_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850ea); break;
1771 /* end-sanitize-v850e */
1772 }
1773 return true;
1774 }
1775
1776 /* Store the machine number in the flags field. */
1777 static void
1778 v850_elf_final_write_processing (abfd, linker)
1779 bfd * abfd;
1780 boolean linker;
1781 {
1782 unsigned long val;
1783
1784 switch (bfd_get_mach (abfd))
1785 {
1786 default:
1787 case 0: val = E_V850_ARCH; break;
1788 /* start-sanitize-v850e */
1789 case bfd_mach_v850e: val = E_V850E_ARCH; break;
1790 case bfd_mach_v850ea: val = E_V850EA_ARCH; break;
1791 /* end-sanitize-v850e */
1792 }
1793
1794 elf_elfheader (abfd)->e_flags &=~ EF_V850_ARCH;
1795 elf_elfheader (abfd)->e_flags |= val;
1796 }
1797
1798 /* Function to keep V850 specific file flags. */
1799 static boolean
1800 v850_elf_set_private_flags (abfd, flags)
1801 bfd * abfd;
1802 flagword flags;
1803 {
1804 BFD_ASSERT (!elf_flags_init (abfd)
1805 || elf_elfheader (abfd)->e_flags == flags);
1806
1807 elf_elfheader (abfd)->e_flags = flags;
1808 elf_flags_init (abfd) = true;
1809 return true;
1810 }
1811
1812 /* Copy backend specific data from one object module to another */
1813 static boolean
1814 v850_elf_copy_private_bfd_data (ibfd, obfd)
1815 bfd * ibfd;
1816 bfd * obfd;
1817 {
1818 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1819 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1820 return true;
1821
1822 BFD_ASSERT (!elf_flags_init (obfd)
1823 || (elf_elfheader (obfd)->e_flags
1824 == elf_elfheader (ibfd)->e_flags));
1825
1826 elf_gp (obfd) = elf_gp (ibfd);
1827 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1828 elf_flags_init (obfd) = true;
1829 return true;
1830 }
1831
1832 /* Merge backend specific data from an object file to the output
1833 object file when linking. */
1834 static boolean
1835 v850_elf_merge_private_bfd_data (ibfd, obfd)
1836 bfd * ibfd;
1837 bfd * obfd;
1838 {
1839 flagword out_flags;
1840 flagword in_flags;
1841
1842 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1843 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1844 return true;
1845
1846 in_flags = elf_elfheader (ibfd)->e_flags;
1847 out_flags = elf_elfheader (obfd)->e_flags;
1848
1849 if (! elf_flags_init (obfd))
1850 {
1851 /* If the input is the default architecture then do not
1852 bother setting the flags for the output architecture,
1853 instead allow future merges to do this. If no future
1854 merges ever set these flags then they will retain their
1855 unitialised values, which surprise surprise, correspond
1856 to the default values. */
1857 if (bfd_get_arch_info (ibfd)->the_default)
1858 return true;
1859
1860 elf_flags_init (obfd) = true;
1861 elf_elfheader (obfd)->e_flags = in_flags;
1862
1863 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
1864 && bfd_get_arch_info (obfd)->the_default)
1865 {
1866 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
1867 }
1868
1869 return true;
1870 }
1871
1872 /* Check flag compatibility. */
1873 if (in_flags == out_flags)
1874 return true;
1875
1876 if ((in_flags & EF_V850_ARCH) != (out_flags & EF_V850_ARCH)
1877 && (in_flags & EF_V850_ARCH) != E_V850_ARCH)
1878 _bfd_error_handler (_("%s: Architecture mismatch with previous modules"),
1879 bfd_get_filename (ibfd));
1880
1881 return true;
1882 }
1883 /* Display the flags field */
1884
1885 static boolean
1886 v850_elf_print_private_bfd_data (abfd, ptr)
1887 bfd * abfd;
1888 PTR ptr;
1889 {
1890 FILE * file = (FILE *) ptr;
1891
1892 BFD_ASSERT (abfd != NULL && ptr != NULL);
1893
1894 _bfd_elf_print_private_bfd_data (abfd, ptr);
1895
1896 /* xgettext:c-format */
1897 fprintf (file, _("private flags = %lx: "), elf_elfheader (abfd)->e_flags);
1898
1899 switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH)
1900 {
1901 default:
1902 case E_V850_ARCH: fprintf (file, _("v850 architecture")); break;
1903 /* start-sanitize-v850e */
1904 case E_V850E_ARCH: fprintf (file, _("v850e architecture")); break;
1905 case E_V850EA_ARCH: fprintf (file, _("v850ea architecture")); break;
1906 /* end-sanitize-v850e */
1907 }
1908
1909 fputc ('\n', file);
1910
1911 return true;
1912 }
1913
1914 /* V850 ELF uses four common sections. One is the usual one, and the
1915 others are for (small) objects in one of the special data areas:
1916 small, tiny and zero. All the objects are kept together, and then
1917 referenced via the gp register, the ep register or the r0 register
1918 respectively, which yields smaller, faster assembler code. This
1919 approach is copied from elf32-mips.c. */
1920
1921 static asection v850_elf_scom_section;
1922 static asymbol v850_elf_scom_symbol;
1923 static asymbol * v850_elf_scom_symbol_ptr;
1924 static asection v850_elf_tcom_section;
1925 static asymbol v850_elf_tcom_symbol;
1926 static asymbol * v850_elf_tcom_symbol_ptr;
1927 static asection v850_elf_zcom_section;
1928 static asymbol v850_elf_zcom_symbol;
1929 static asymbol * v850_elf_zcom_symbol_ptr;
1930
1931
1932 /* Given a BFD section, try to locate the corresponding ELF section
1933 index. */
1934
1935 static boolean
1936 v850_elf_section_from_bfd_section (abfd, hdr, sec, retval)
1937 bfd * abfd;
1938 Elf32_Internal_Shdr * hdr;
1939 asection * sec;
1940 int * retval;
1941 {
1942 if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0)
1943 *retval = SHN_V850_SCOMMON;
1944 else if (strcmp (bfd_get_section_name (abfd, sec), ".tcommon") == 0)
1945 *retval = SHN_V850_TCOMMON;
1946 else if (strcmp (bfd_get_section_name (abfd, sec), ".zcommon") == 0)
1947 *retval = SHN_V850_ZCOMMON;
1948 else
1949 return false;
1950
1951 return true;
1952 }
1953
1954 /* Handle the special V850 section numbers that a symbol may use. */
1955
1956 static void
1957 v850_elf_symbol_processing (abfd, asym)
1958 bfd * abfd;
1959 asymbol * asym;
1960 {
1961 elf_symbol_type * elfsym = (elf_symbol_type *) asym;
1962 unsigned short index;
1963
1964 index = elfsym->internal_elf_sym.st_shndx;
1965
1966 /* If the section index is an "ordinary" index, then it may
1967 refer to a v850 specific section created by the assembler.
1968 Check the section's type and change the index it matches.
1969
1970 FIXME: Should we alter the st_shndx field as well ? */
1971
1972 if (index < elf_elfheader(abfd)[0].e_shnum)
1973 switch (elf_elfsections(abfd)[index]->sh_type)
1974 {
1975 case SHT_V850_SCOMMON:
1976 index = SHN_V850_SCOMMON;
1977 break;
1978
1979 case SHT_V850_TCOMMON:
1980 index = SHN_V850_TCOMMON;
1981 break;
1982
1983 case SHT_V850_ZCOMMON:
1984 index = SHN_V850_ZCOMMON;
1985 break;
1986
1987 default:
1988 break;
1989 }
1990
1991 switch (index)
1992 {
1993 case SHN_V850_SCOMMON:
1994 if (v850_elf_scom_section.name == NULL)
1995 {
1996 /* Initialize the small common section. */
1997 v850_elf_scom_section.name = ".scommon";
1998 v850_elf_scom_section.flags = SEC_IS_COMMON | SEC_ALLOC | SEC_DATA;
1999 v850_elf_scom_section.output_section = & v850_elf_scom_section;
2000 v850_elf_scom_section.symbol = & v850_elf_scom_symbol;
2001 v850_elf_scom_section.symbol_ptr_ptr = & v850_elf_scom_symbol_ptr;
2002 v850_elf_scom_symbol.name = ".scommon";
2003 v850_elf_scom_symbol.flags = BSF_SECTION_SYM;
2004 v850_elf_scom_symbol.section = & v850_elf_scom_section;
2005 v850_elf_scom_symbol_ptr = & v850_elf_scom_symbol;
2006 }
2007 asym->section = & v850_elf_scom_section;
2008 asym->value = elfsym->internal_elf_sym.st_size;
2009 break;
2010
2011 case SHN_V850_TCOMMON:
2012 if (v850_elf_tcom_section.name == NULL)
2013 {
2014 /* Initialize the tcommon section. */
2015 v850_elf_tcom_section.name = ".tcommon";
2016 v850_elf_tcom_section.flags = SEC_IS_COMMON;
2017 v850_elf_tcom_section.output_section = & v850_elf_tcom_section;
2018 v850_elf_tcom_section.symbol = & v850_elf_tcom_symbol;
2019 v850_elf_tcom_section.symbol_ptr_ptr = & v850_elf_tcom_symbol_ptr;
2020 v850_elf_tcom_symbol.name = ".tcommon";
2021 v850_elf_tcom_symbol.flags = BSF_SECTION_SYM;
2022 v850_elf_tcom_symbol.section = & v850_elf_tcom_section;
2023 v850_elf_tcom_symbol_ptr = & v850_elf_tcom_symbol;
2024 }
2025 asym->section = & v850_elf_tcom_section;
2026 asym->value = elfsym->internal_elf_sym.st_size;
2027 break;
2028
2029 case SHN_V850_ZCOMMON:
2030 if (v850_elf_zcom_section.name == NULL)
2031 {
2032 /* Initialize the zcommon section. */
2033 v850_elf_zcom_section.name = ".zcommon";
2034 v850_elf_zcom_section.flags = SEC_IS_COMMON;
2035 v850_elf_zcom_section.output_section = & v850_elf_zcom_section;
2036 v850_elf_zcom_section.symbol = & v850_elf_zcom_symbol;
2037 v850_elf_zcom_section.symbol_ptr_ptr = & v850_elf_zcom_symbol_ptr;
2038 v850_elf_zcom_symbol.name = ".zcommon";
2039 v850_elf_zcom_symbol.flags = BSF_SECTION_SYM;
2040 v850_elf_zcom_symbol.section = & v850_elf_zcom_section;
2041 v850_elf_zcom_symbol_ptr = & v850_elf_zcom_symbol;
2042 }
2043 asym->section = & v850_elf_zcom_section;
2044 asym->value = elfsym->internal_elf_sym.st_size;
2045 break;
2046 }
2047 }
2048
2049 /* Hook called by the linker routine which adds symbols from an object
2050 file. We must handle the special v850 section numbers here. */
2051
2052 /*ARGSUSED*/
2053 static boolean
2054 v850_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
2055 bfd * abfd;
2056 struct bfd_link_info * info;
2057 const Elf_Internal_Sym * sym;
2058 const char ** namep;
2059 flagword * flagsp;
2060 asection ** secp;
2061 bfd_vma * valp;
2062 {
2063 int index = sym->st_shndx;
2064
2065 /* If the section index is an "ordinary" index, then it may
2066 refer to a v850 specific section created by the assembler.
2067 Check the section's type and change the index it matches.
2068
2069 FIXME: Should we alter the st_shndx field as well ? */
2070
2071 if (index < elf_elfheader(abfd)[0].e_shnum)
2072 switch (elf_elfsections(abfd)[index]->sh_type)
2073 {
2074 case SHT_V850_SCOMMON:
2075 index = SHN_V850_SCOMMON;
2076 break;
2077
2078 case SHT_V850_TCOMMON:
2079 index = SHN_V850_TCOMMON;
2080 break;
2081
2082 case SHT_V850_ZCOMMON:
2083 index = SHN_V850_ZCOMMON;
2084 break;
2085
2086 default:
2087 break;
2088 }
2089
2090 switch (index)
2091 {
2092 case SHN_V850_SCOMMON:
2093 *secp = bfd_make_section_old_way (abfd, ".scommon");
2094 (*secp)->flags |= SEC_IS_COMMON;
2095 *valp = sym->st_size;
2096 break;
2097
2098 case SHN_V850_TCOMMON:
2099 *secp = bfd_make_section_old_way (abfd, ".tcommon");
2100 (*secp)->flags |= SEC_IS_COMMON;
2101 *valp = sym->st_size;
2102 break;
2103
2104 case SHN_V850_ZCOMMON:
2105 *secp = bfd_make_section_old_way (abfd, ".zcommon");
2106 (*secp)->flags |= SEC_IS_COMMON;
2107 *valp = sym->st_size;
2108 break;
2109 }
2110
2111 return true;
2112 }
2113
2114 /*ARGSIGNORED*/
2115 static boolean
2116 v850_elf_link_output_symbol_hook (abfd, info, name, sym, input_sec)
2117 bfd * abfd;
2118 struct bfd_link_info * info;
2119 const char * name;
2120 Elf_Internal_Sym * sym;
2121 asection * input_sec;
2122 {
2123 /* If we see a common symbol, which implies a relocatable link, then
2124 if a symbol was in a special common section in an input file, mark
2125 it as a special common in the output file. */
2126
2127 if (sym->st_shndx == SHN_COMMON)
2128 {
2129 if (strcmp (input_sec->name, ".scommon") == 0)
2130 sym->st_shndx = SHN_V850_SCOMMON;
2131 else if (strcmp (input_sec->name, ".tcommon") == 0)
2132 sym->st_shndx = SHN_V850_TCOMMON;
2133 else if (strcmp (input_sec->name, ".zcommon") == 0)
2134 sym->st_shndx = SHN_V850_ZCOMMON;
2135 }
2136
2137 return true;
2138 }
2139
2140 static boolean
2141 v850_elf_section_from_shdr (abfd, hdr, name)
2142 bfd * abfd;
2143 Elf_Internal_Shdr * hdr;
2144 char * name;
2145 {
2146 /* There ought to be a place to keep ELF backend specific flags, but
2147 at the moment there isn't one. We just keep track of the
2148 sections by their name, instead. */
2149
2150 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2151 return false;
2152
2153 switch (hdr->sh_type)
2154 {
2155 case SHT_V850_SCOMMON:
2156 case SHT_V850_TCOMMON:
2157 case SHT_V850_ZCOMMON:
2158 if (! bfd_set_section_flags (abfd, hdr->bfd_section,
2159 (bfd_get_section_flags (abfd,
2160 hdr->bfd_section)
2161 | SEC_IS_COMMON)))
2162 return false;
2163 }
2164
2165 return true;
2166 }
2167
2168 /* Set the correct type for a V850 ELF section. We do this by the
2169 section name, which is a hack, but ought to work. */
2170 static boolean
2171 v850_elf_fake_sections (abfd, hdr, sec)
2172 bfd * abfd;
2173 Elf32_Internal_Shdr * hdr;
2174 asection * sec;
2175 {
2176 register const char * name;
2177
2178 name = bfd_get_section_name (abfd, sec);
2179
2180 if (strcmp (name, ".scommon") == 0)
2181 {
2182 hdr->sh_type = SHT_V850_SCOMMON;
2183 }
2184 else if (strcmp (name, ".tcommon") == 0)
2185 {
2186 hdr->sh_type = SHT_V850_TCOMMON;
2187 }
2188 else if (strcmp (name, ".zcommon") == 0)
2189 hdr->sh_type = SHT_V850_ZCOMMON;
2190
2191 return true;
2192 }
2193
2194
2195 \f
2196 #define TARGET_LITTLE_SYM bfd_elf32_v850_vec
2197 #define TARGET_LITTLE_NAME "elf32-v850"
2198 #define ELF_ARCH bfd_arch_v850
2199 #define ELF_MACHINE_CODE EM_CYGNUS_V850
2200 #define ELF_MAXPAGESIZE 0x1000
2201
2202 #define elf_info_to_howto v850_elf_info_to_howto_rela
2203 #define elf_info_to_howto_rel v850_elf_info_to_howto_rel
2204
2205 #define elf_backend_check_relocs v850_elf_check_relocs
2206 #define elf_backend_relocate_section v850_elf_relocate_section
2207 #define elf_backend_object_p v850_elf_object_p
2208 #define elf_backend_final_write_processing v850_elf_final_write_processing
2209 #define elf_backend_section_from_bfd_section v850_elf_section_from_bfd_section
2210 #define elf_backend_symbol_processing v850_elf_symbol_processing
2211 #define elf_backend_add_symbol_hook v850_elf_add_symbol_hook
2212 #define elf_backend_link_output_symbol_hook v850_elf_link_output_symbol_hook
2213 #define elf_backend_section_from_shdr v850_elf_section_from_shdr
2214 #define elf_backend_fake_sections v850_elf_fake_sections
2215 #define elf_backend_gc_mark_hook v850_elf_gc_mark_hook
2216 #define elf_backend_gc_sweep_hook v850_elf_gc_sweep_hook
2217
2218 #define elf_backend_can_gc_sections 1
2219
2220
2221 #define bfd_elf32_bfd_is_local_label_name v850_elf_is_local_label_name
2222 #define bfd_elf32_bfd_reloc_type_lookup v850_elf_reloc_type_lookup
2223 #define bfd_elf32_bfd_copy_private_bfd_data v850_elf_copy_private_bfd_data
2224 #define bfd_elf32_bfd_merge_private_bfd_data v850_elf_merge_private_bfd_data
2225 #define bfd_elf32_bfd_set_private_flags v850_elf_set_private_flags
2226 #define bfd_elf32_bfd_print_private_bfd_data v850_elf_print_private_bfd_data
2227
2228 #define elf_symbol_leading_char '_'
2229
2230 #include "elf32-target.h"
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