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[binutils.git] / bfd / elf32-cris.c
blobcc0b24fd2f7416e8f858d4e858adbda63cf53405
1 /* CRIS-specific support for 32-bit ELF.
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Contributed by Axis Communications AB.
5 Written by Hans-Peter Nilsson, based on elf32-fr30.c
6 PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24 #include "bfd.h"
25 #include "sysdep.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28 #include "elf/cris.h"
29
30 /* Forward declarations. */
31 static reloc_howto_type * cris_reloc_type_lookup
32 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
33
34 static void cris_info_to_howto_rela
35 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
36
37 static bfd_reloc_status_type cris_elf_pcrel_reloc
38 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
39
40 static bfd_boolean cris_elf_grok_prstatus
41 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
42
43 static bfd_boolean cris_elf_grok_psinfo
44 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
45
46 static bfd_boolean cris_elf_relocate_section
47 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
48 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
49
50 static bfd_reloc_status_type cris_final_link_relocate
51 PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
52 Elf_Internal_Rela *, bfd_vma));
53
54 static bfd_boolean cris_elf_object_p PARAMS ((bfd *));
55
56 static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean));
57
58 static bfd_boolean cris_elf_set_mach_from_flags
59 PARAMS ((bfd *, unsigned long int));
60
61 static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
62
63 static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
64 static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
65
66 struct elf_cris_link_hash_entry;
67 static bfd_boolean elf_cris_discard_excess_dso_dynamics
68 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
69 static bfd_boolean elf_cris_discard_excess_program_dynamics
70 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
71 static bfd_boolean elf_cris_adjust_gotplt_to_got
72 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
73 static bfd_boolean elf_cris_try_fold_plt_to_got
74 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
75 static struct bfd_hash_entry *elf_cris_link_hash_newfunc
76 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
77 static struct bfd_link_hash_table *elf_cris_link_hash_table_create
78 PARAMS ((bfd *));
79 static bfd_boolean elf_cris_adjust_dynamic_symbol
80 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
81 static bfd_boolean cris_elf_check_relocs
82 PARAMS ((bfd *, struct bfd_link_info *, asection *,
83 const Elf_Internal_Rela *));
84
85 static bfd_boolean elf_cris_size_dynamic_sections
86 PARAMS ((bfd *, struct bfd_link_info *));
87 static bfd_boolean elf_cris_finish_dynamic_symbol
88 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
89 Elf_Internal_Sym *));
90 static bfd_boolean elf_cris_finish_dynamic_sections
91 PARAMS ((bfd *, struct bfd_link_info *));
92 static void elf_cris_hide_symbol
93 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
94 static enum elf_reloc_type_class elf_cris_reloc_type_class
95 PARAMS ((const Elf_Internal_Rela *));
96
97 static reloc_howto_type cris_elf_howto_table [] =
98 {
99 /* This reloc does nothing. */
100 HOWTO (R_CRIS_NONE, /* type */
101 0, /* rightshift */
102 2, /* size (0 = byte, 1 = short, 2 = long) */
103 32, /* bitsize */
104 FALSE, /* pc_relative */
105 0, /* bitpos */
106 complain_overflow_bitfield, /* complain_on_overflow */
107 bfd_elf_generic_reloc, /* special_function */
108 "R_CRIS_NONE", /* name */
109 FALSE, /* partial_inplace */
110 0, /* src_mask */
111 0, /* dst_mask */
112 FALSE), /* pcrel_offset */
113
114 /* An 8 bit absolute relocation. */
115 HOWTO (R_CRIS_8, /* type */
116 0, /* rightshift */
117 0, /* size (0 = byte, 1 = short, 2 = long) */
118 8, /* bitsize */
119 FALSE, /* pc_relative */
120 0, /* bitpos */
121 complain_overflow_bitfield, /* complain_on_overflow */
122 bfd_elf_generic_reloc, /* special_function */
123 "R_CRIS_8", /* name */
124 FALSE, /* partial_inplace */
125 0x0000, /* src_mask */
126 0x00ff, /* dst_mask */
127 FALSE), /* pcrel_offset */
128
129 /* A 16 bit absolute relocation. */
130 HOWTO (R_CRIS_16, /* type */
131 0, /* rightshift */
132 1, /* size (0 = byte, 1 = short, 2 = long) */
133 16, /* bitsize */
134 FALSE, /* pc_relative */
135 0, /* bitpos */
136 complain_overflow_bitfield, /* complain_on_overflow */
137 bfd_elf_generic_reloc, /* special_function */
138 "R_CRIS_16", /* name */
139 FALSE, /* partial_inplace */
140 0x00000000, /* src_mask */
141 0x0000ffff, /* dst_mask */
142 FALSE), /* pcrel_offset */
143
144 /* A 32 bit absolute relocation. */
145 HOWTO (R_CRIS_32, /* type */
146 0, /* rightshift */
147 2, /* size (0 = byte, 1 = short, 2 = long) */
148 32, /* bitsize */
149 FALSE, /* pc_relative */
150 0, /* bitpos */
151 /* We don't want overflow complaints for 64-bit vma builds
152 for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
153 32-bit ELF) where sym=0xc0001234.
154 Don't do this for the PIC relocs, as we don't expect to
155 see them with large offsets. */
156 complain_overflow_dont, /* complain_on_overflow */
157 bfd_elf_generic_reloc, /* special_function */
158 "R_CRIS_32", /* name */
159 FALSE, /* partial_inplace */
160 0x00000000, /* src_mask */
161 0xffffffff, /* dst_mask */
162 FALSE), /* pcrel_offset */
163
164 /* An 8 bit PC-relative relocation. */
165 HOWTO (R_CRIS_8_PCREL, /* type */
166 0, /* rightshift */
167 0, /* size (0 = byte, 1 = short, 2 = long) */
168 8, /* bitsize */
169 TRUE, /* pc_relative */
170 0, /* bitpos */
171 complain_overflow_bitfield, /* complain_on_overflow */
172 cris_elf_pcrel_reloc, /* special_function */
173 "R_CRIS_8_PCREL", /* name */
174 FALSE, /* partial_inplace */
175 0x0000, /* src_mask */
176 0x00ff, /* dst_mask */
177 TRUE), /* pcrel_offset */
178
179 /* A 16 bit PC-relative relocation. */
180 HOWTO (R_CRIS_16_PCREL, /* type */
181 0, /* rightshift */
182 1, /* size (0 = byte, 1 = short, 2 = long) */
183 16, /* bitsize */
184 TRUE, /* pc_relative */
185 0, /* bitpos */
186 complain_overflow_bitfield, /* complain_on_overflow */
187 cris_elf_pcrel_reloc, /* special_function */
188 "R_CRIS_16_PCREL", /* name */
189 FALSE, /* partial_inplace */
190 0x00000000, /* src_mask */
191 0x0000ffff, /* dst_mask */
192 TRUE), /* pcrel_offset */
193
194 /* A 32 bit PC-relative relocation. */
195 HOWTO (R_CRIS_32_PCREL, /* type */
196 0, /* rightshift */
197 2, /* size (0 = byte, 1 = short, 2 = long) */
198 32, /* bitsize */
199 TRUE, /* pc_relative */
200 0, /* bitpos */
201 complain_overflow_bitfield, /* complain_on_overflow */
202 cris_elf_pcrel_reloc, /* special_function */
203 "R_CRIS_32_PCREL", /* name */
204 FALSE, /* partial_inplace */
205 0x00000000, /* src_mask */
206 0xffffffff, /* dst_mask */
207 TRUE), /* pcrel_offset */
208
209 /* GNU extension to record C++ vtable hierarchy. */
210 HOWTO (R_CRIS_GNU_VTINHERIT, /* type */
211 0, /* rightshift */
212 2, /* size (0 = byte, 1 = short, 2 = long) */
213 0, /* bitsize */
214 FALSE, /* pc_relative */
215 0, /* bitpos */
216 complain_overflow_dont, /* complain_on_overflow */
217 NULL, /* special_function */
218 "R_CRIS_GNU_VTINHERIT", /* name */
219 FALSE, /* partial_inplace */
220 0, /* src_mask */
221 0, /* dst_mask */
222 FALSE), /* pcrel_offset */
223
224 /* GNU extension to record C++ vtable member usage. */
225 HOWTO (R_CRIS_GNU_VTENTRY, /* type */
226 0, /* rightshift */
227 2, /* size (0 = byte, 1 = short, 2 = long) */
228 0, /* bitsize */
229 FALSE, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_dont, /* complain_on_overflow */
232 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
233 "R_CRIS_GNU_VTENTRY", /* name */
234 FALSE, /* partial_inplace */
235 0, /* src_mask */
236 0, /* dst_mask */
237 FALSE), /* pcrel_offset */
238
239 /* This is used only by the dynamic linker. The symbol should exist
240 both in the object being run and in some shared library. The
241 dynamic linker copies the data addressed by the symbol from the
242 shared library into the object, because the object being
243 run has to have the data at some particular address. */
244 HOWTO (R_CRIS_COPY, /* type */
245 0, /* rightshift */
246 2, /* size (0 = byte, 1 = short, 2 = long) */
247 32, /* bitsize */
248 FALSE, /* pc_relative */
249 0, /* bitpos */
250 complain_overflow_bitfield, /* complain_on_overflow */
251 bfd_elf_generic_reloc, /* special_function */
252 "R_CRIS_COPY", /* name */
253 FALSE, /* partial_inplace */
254 0, /* src_mask */
255 0, /* dst_mask */
256 FALSE), /* pcrel_offset */
257
258 /* Like R_CRIS_32, but used when setting global offset table entries. */
259 HOWTO (R_CRIS_GLOB_DAT, /* type */
260 0, /* rightshift */
261 2, /* size (0 = byte, 1 = short, 2 = long) */
262 32, /* bitsize */
263 FALSE, /* pc_relative */
264 0, /* bitpos */
265 complain_overflow_bitfield, /* complain_on_overflow */
266 bfd_elf_generic_reloc, /* special_function */
267 "R_CRIS_GLOB_DAT", /* name */
268 FALSE, /* partial_inplace */
269 0, /* src_mask */
270 0xffffffff, /* dst_mask */
271 FALSE), /* pcrel_offset */
272
273 /* Marks a procedure linkage table entry for a symbol. */
274 HOWTO (R_CRIS_JUMP_SLOT, /* type */
275 0, /* rightshift */
276 2, /* size (0 = byte, 1 = short, 2 = long) */
277 32, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_bitfield, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_CRIS_JUMP_SLOT", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* Used only by the dynamic linker. When the object is run, this
289 longword is set to the load address of the object, plus the
290 addend. */
291 HOWTO (R_CRIS_RELATIVE, /* type */
292 0, /* rightshift */
293 2, /* size (0 = byte, 1 = short, 2 = long) */
294 32, /* bitsize */
295 FALSE, /* pc_relative */
296 0, /* bitpos */
297 complain_overflow_bitfield, /* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_CRIS_RELATIVE", /* name */
300 FALSE, /* partial_inplace */
301 0, /* src_mask */
302 0xffffffff, /* dst_mask */
303 FALSE), /* pcrel_offset */
304
305 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
306 HOWTO (R_CRIS_16_GOT, /* type */
307 0, /* rightshift */
308 1, /* size (0 = byte, 1 = short, 2 = long) */
309 16, /* bitsize */
310 FALSE, /* pc_relative */
311 0, /* bitpos */
312 complain_overflow_bitfield, /* complain_on_overflow */
313 bfd_elf_generic_reloc, /* special_function */
314 "R_CRIS_16_GOT", /* name */
315 FALSE, /* partial_inplace */
316 0, /* src_mask */
317 0xffff, /* dst_mask */
318 FALSE), /* pcrel_offset */
319
320 HOWTO (R_CRIS_32_GOT, /* type */
321 0, /* rightshift */
322 2, /* size (0 = byte, 1 = short, 2 = long) */
323 32, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_bitfield, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_CRIS_32_GOT", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffffffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
335 the GOT table for the symbol. */
336 HOWTO (R_CRIS_16_GOTPLT, /* type */
337 0, /* rightshift */
338 1, /* size (0 = byte, 1 = short, 2 = long) */
339 16, /* bitsize */
340 FALSE, /* pc_relative */
341 0, /* bitpos */
342 complain_overflow_bitfield, /* complain_on_overflow */
343 bfd_elf_generic_reloc, /* special_function */
344 "R_CRIS_16_GOTPLT", /* name */
345 FALSE, /* partial_inplace */
346 0, /* src_mask */
347 0xffff, /* dst_mask */
348 FALSE), /* pcrel_offset */
349
350 HOWTO (R_CRIS_32_GOTPLT, /* type */
351 0, /* rightshift */
352 2, /* size (0 = byte, 1 = short, 2 = long) */
353 32, /* bitsize */
354 FALSE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_bitfield, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_CRIS_32_GOTPLT", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0xffffffff, /* dst_mask */
362 FALSE), /* pcrel_offset */
363
364 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
365 be necessary. */
366 HOWTO (R_CRIS_32_GOTREL, /* type */
367 0, /* rightshift */
368 2, /* size (0 = byte, 1 = short, 2 = long) */
369 32, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_bitfield, /* complain_on_overflow */
373 bfd_elf_generic_reloc, /* special_function */
374 "R_CRIS_32_GOTREL", /* name */
375 FALSE, /* partial_inplace */
376 0, /* src_mask */
377 0xffffffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 /* A 32-bit offset from GOT to entry for this symbol in PLT and request
381 to create PLT entry for symbol. */
382 HOWTO (R_CRIS_32_PLT_GOTREL, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 32, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_bitfield, /* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_CRIS_32_PLT_GOTREL", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0xffffffff, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 /* A 32-bit offset from PC (location after the relocation) + addend to
397 entry for this symbol in PLT and request to create PLT entry for
398 symbol. */
399 HOWTO (R_CRIS_32_PLT_PCREL, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 32, /* bitsize */
403 TRUE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_bitfield, /* complain_on_overflow */
406 cris_elf_pcrel_reloc, /* special_function */
407 "R_CRIS_32_PLT_PCREL", /* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0xffffffff, /* dst_mask */
411 TRUE) /* pcrel_offset */
412 };
413 \f
414 /* Map BFD reloc types to CRIS ELF reloc types. */
415
416 struct cris_reloc_map
417 {
418 bfd_reloc_code_real_type bfd_reloc_val;
419 unsigned int cris_reloc_val;
420 };
421
422 static const struct cris_reloc_map cris_reloc_map [] =
423 {
424 { BFD_RELOC_NONE, R_CRIS_NONE },
425 { BFD_RELOC_8, R_CRIS_8 },
426 { BFD_RELOC_16, R_CRIS_16 },
427 { BFD_RELOC_32, R_CRIS_32 },
428 { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL },
429 { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL },
430 { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL },
431 { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT },
432 { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY },
433 { BFD_RELOC_CRIS_COPY, R_CRIS_COPY },
434 { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT },
435 { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT },
436 { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE },
437 { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT },
438 { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT },
439 { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT },
440 { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT },
441 { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL },
442 { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
443 { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL }
444 };
445
446 static reloc_howto_type *
447 cris_reloc_type_lookup (abfd, code)
448 bfd * abfd ATTRIBUTE_UNUSED;
449 bfd_reloc_code_real_type code;
450 {
451 unsigned int i;
452
453 for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
454 if (cris_reloc_map [i].bfd_reloc_val == code)
455 return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
456
457 return NULL;
458 }
459
460 /* Set the howto pointer for an CRIS ELF reloc. */
461
462 static void
463 cris_info_to_howto_rela (abfd, cache_ptr, dst)
464 bfd * abfd ATTRIBUTE_UNUSED;
465 arelent * cache_ptr;
466 Elf_Internal_Rela * dst;
467 {
468 unsigned int r_type;
469
470 r_type = ELF32_R_TYPE (dst->r_info);
471 BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
472 cache_ptr->howto = & cris_elf_howto_table [r_type];
473 }
474
475 bfd_reloc_status_type
476 cris_elf_pcrel_reloc (abfd, reloc_entry, symbol, data, input_section,
477 output_bfd, error_message)
478 bfd *abfd ATTRIBUTE_UNUSED;
479 arelent *reloc_entry;
480 asymbol *symbol;
481 PTR data ATTRIBUTE_UNUSED;
482 asection *input_section;
483 bfd *output_bfd;
484 char **error_message ATTRIBUTE_UNUSED;
485 {
486 /* By default (using only bfd_elf_generic_reloc when linking to
487 non-ELF formats) PC-relative relocs are relative to the beginning
488 of the reloc. CRIS PC-relative relocs are relative to the position
489 *after* the reloc because that's what pre-CRISv32 PC points to
490 after reading an insn field with that reloc. (For CRISv32, PC is
491 actually relative to the start of the insn, but we keep the old
492 definition.) Still, we use as much generic machinery as we can.
493
494 Only adjust when doing a final link. */
495 if (output_bfd == (bfd *) NULL)
496 reloc_entry->addend -= 1 << reloc_entry->howto->size;
497
498 return
499 bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
500 input_section, output_bfd, error_message);
501 }
502 \f
503 /* Support for core dump NOTE sections.
504 The slightly unintuitive code layout is an attempt to keep at least
505 some similarities with other ports, hoping to simplify general
506 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
507
508 static bfd_boolean
509 cris_elf_grok_prstatus (abfd, note)
510 bfd *abfd;
511 Elf_Internal_Note *note;
512 {
513 int offset;
514 size_t size;
515
516 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
517 switch (note->descsz)
518 {
519 default:
520 return FALSE;
521
522 case 202: /* Linux/CRISv32 */
523 /* pr_cursig */
524 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
525
526 /* pr_pid */
527 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
528
529 /* pr_reg */
530 offset = 70;
531 size = 128;
532
533 break;
534 }
535 else
536 switch (note->descsz)
537 {
538 default:
539 return FALSE;
540
541 case 214: /* Linux/CRIS */
542 /* pr_cursig */
543 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
544
545 /* pr_pid */
546 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
547
548 /* pr_reg */
549 offset = 70;
550 size = 140;
551
552 break;
553 }
554
555 /* Make a ".reg/999" section. */
556 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
557 size, note->descpos + offset);
558 }
559
560 static bfd_boolean
561 cris_elf_grok_psinfo (abfd, note)
562 bfd *abfd;
563 Elf_Internal_Note *note;
564 {
565 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
566 switch (note->descsz)
567 {
568 default:
569 return FALSE;
570
571 case 124: /* Linux/CRISv32 elf_prpsinfo */
572 elf_tdata (abfd)->core_program
573 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
574 elf_tdata (abfd)->core_command
575 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
576 }
577 else
578 switch (note->descsz)
579 {
580 default:
581 return FALSE;
582
583 case 124: /* Linux/CRIS elf_prpsinfo */
584 elf_tdata (abfd)->core_program
585 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
586 elf_tdata (abfd)->core_command
587 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
588 }
589
590 /* Note that for some reason, a spurious space is tacked
591 onto the end of the args in some (at least one anyway)
592 implementations, so strip it off if it exists. */
593
594 {
595 char *command = elf_tdata (abfd)->core_command;
596 int n = strlen (command);
597
598 if (0 < n && command[n - 1] == ' ')
599 command[n - 1] = '\0';
600 }
601
602 return TRUE;
603 }
604 \f
605 /* The name of the dynamic interpreter. This is put in the .interp
606 section. */
607
608 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
609
610 /* The size in bytes of an entry in the procedure linkage table. */
611
612 #define PLT_ENTRY_SIZE 20
613 #define PLT_ENTRY_SIZE_V32 26
614
615 /* The first entry in an absolute procedure linkage table looks like this. */
616
617 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
618 {
619 0xfc, 0xe1,
620 0x7e, 0x7e, /* push mof. */
621 0x7f, 0x0d, /* (dip [pc+]) */
622 0, 0, 0, 0, /* Replaced with address of .got + 4. */
623 0x30, 0x7a, /* move [...],mof */
624 0x7f, 0x0d, /* (dip [pc+]) */
625 0, 0, 0, 0, /* Replaced with address of .got + 8. */
626 0x30, 0x09 /* jump [...] */
627 };
628
629 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
630 {
631 0x84, 0xe2, /* subq 4,$sp */
632 0x6f, 0xfe, /* move.d 0,$acr */
633 0, 0, 0, 0, /* Replaced by address of .got + 4. */
634 0x7e, 0x7a, /* move $mof,[$sp] */
635 0x3f, 0x7a, /* move [$acr],$mof */
636 0x04, 0xf2, /* addq 4,acr */
637 0x6f, 0xfa, /* move.d [$acr],$acr */
638 0xbf, 0x09, /* jump $acr */
639 0xb0, 0x05, /* nop */
640 0, 0 /* Pad out to 26 bytes. */
641 };
642
643 /* Subsequent entries in an absolute procedure linkage table look like
644 this. */
645
646 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
647 {
648 0x7f, 0x0d, /* (dip [pc+]) */
649 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
650 0x30, 0x09, /* jump [...] */
651 0x3f, 0x7e, /* move [pc+],mof */
652 0, 0, 0, 0, /* Replaced with offset into relocation table. */
653 0x2f, 0xfe, /* add.d [pc+],pc */
654 0xec, 0xff,
655 0xff, 0xff /* Replaced with offset to start of .plt. */
656 };
657
658 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
659 {
660 0x6f, 0xfe, /* move.d 0,$acr */
661 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
662 0x6f, 0xfa, /* move.d [$acr],$acr */
663 0xbf, 0x09, /* jump $acr */
664 0xb0, 0x05, /* nop */
665 0x3f, 0x7e, /* move 0,mof */
666 0, 0, 0, 0, /* Replaced with offset into relocation table. */
667 0xbf, 0x0e, /* ba start_of_plt0_entry */
668 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
669 0xb0, 0x05 /* nop */
670 };
671
672 /* The first entry in a PIC procedure linkage table looks like this. */
673
674 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
675 {
676 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
677 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
678 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
679 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
680 };
681
682 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
683 {
684 0x84, 0xe2, /* subq 4,$sp */
685 0x04, 0x01, /* addoq 4,$r0,$acr */
686 0x7e, 0x7a, /* move $mof,[$sp] */
687 0x3f, 0x7a, /* move [$acr],$mof */
688 0x04, 0xf2, /* addq 4,$acr */
689 0x6f, 0xfa, /* move.d [$acr],$acr */
690 0xbf, 0x09, /* jump $acr */
691 0xb0, 0x05, /* nop */
692 0, 0, /* Pad out to 26 bytes. */
693 0, 0, 0, 0,
694 0, 0, 0, 0
695 };
696
697 /* Subsequent entries in a PIC procedure linkage table look like this. */
698
699 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
700 {
701 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
702 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
703 0x30, 0x09, /* jump [...] */
704 0x3f, 0x7e, /* move [pc+],mof */
705 0, 0, 0, 0, /* Replaced with offset into relocation table. */
706 0x2f, 0xfe, /* add.d [pc+],pc */
707 0xec, 0xff, /* Replaced with offset to start of .plt. */
708 0xff, 0xff
709 };
710
711 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
712 {
713 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
714 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
715 0x6f, 0xfa, /* move.d [$acr],$acr */
716 0xbf, 0x09, /* jump $acr */
717 0xb0, 0x05, /* nop */
718 0x3f, 0x7e, /* move relocoffs,$mof */
719 0, 0, 0, 0, /* Replaced with offset into relocation table. */
720 0xbf, 0x0e, /* ba start_of_plt */
721 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
722 0xb0, 0x05 /* nop */
723 };
724 \f
725 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
726 (and most other PIC/shlib stuff). Check that we don't drift away
727 without reason.
728
729 The CRIS linker, like the m68k and i386 linkers (and probably the rest
730 too) needs to keep track of the number of relocs that it decides to
731 copy in check_relocs for each symbol. This is so that it can discard
732 PC relative relocs if it doesn't need them when linking with
733 -Bsymbolic. We store the information in a field extending the regular
734 ELF linker hash table. */
735
736 /* This structure keeps track of the number of PC relative relocs we have
737 copied for a given symbol. */
738
739 struct elf_cris_pcrel_relocs_copied
740 {
741 /* Next section. */
742 struct elf_cris_pcrel_relocs_copied *next;
743 /* A section in dynobj. */
744 asection *section;
745 /* Number of relocs copied in this section. */
746 bfd_size_type count;
747 };
748
749 /* CRIS ELF linker hash entry. */
750
751 struct elf_cris_link_hash_entry
752 {
753 struct elf_link_hash_entry root;
754
755 /* Number of PC relative relocs copied for this symbol. */
756 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
757
758 /* The GOTPLT references are CRIS-specific; the goal is to avoid having
759 both a general GOT and a PLT-specific GOT entry for the same symbol,
760 when it is referenced both as a function and as a function pointer.
761
762 Number of GOTPLT references for a function. */
763 bfd_signed_vma gotplt_refcount;
764
765 /* Actual GOTPLT index for this symbol, if applicable, or zero if not
766 (zero is never used as an index). FIXME: We should be able to fold
767 this with gotplt_refcount in a union, like the got and plt unions in
768 elf_link_hash_entry. */
769 bfd_size_type gotplt_offset;
770 };
771
772 /* CRIS ELF linker hash table. */
773
774 struct elf_cris_link_hash_table
775 {
776 struct elf_link_hash_table root;
777
778 /* We can't use the PLT offset and calculate to get the GOTPLT offset,
779 since we try and avoid creating GOTPLT:s when there's already a GOT.
780 Instead, we keep and update the next available index here. */
781 bfd_size_type next_gotplt_entry;
782 };
783
784 /* Traverse a CRIS ELF linker hash table. */
785
786 #define elf_cris_link_hash_traverse(table, func, info) \
787 (elf_link_hash_traverse \
788 (&(table)->root, \
789 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
790 (info)))
791
792 /* Get the CRIS ELF linker hash table from a link_info structure. */
793
794 #define elf_cris_hash_table(p) \
795 ((struct elf_cris_link_hash_table *) (p)->hash)
796
797 /* Create an entry in a CRIS ELF linker hash table. */
798
799 static struct bfd_hash_entry *
800 elf_cris_link_hash_newfunc (entry, table, string)
801 struct bfd_hash_entry *entry;
802 struct bfd_hash_table *table;
803 const char *string;
804 {
805 struct elf_cris_link_hash_entry *ret =
806 (struct elf_cris_link_hash_entry *) entry;
807
808 /* Allocate the structure if it has not already been allocated by a
809 subclass. */
810 if (ret == (struct elf_cris_link_hash_entry *) NULL)
811 ret = ((struct elf_cris_link_hash_entry *)
812 bfd_hash_allocate (table,
813 sizeof (struct elf_cris_link_hash_entry)));
814 if (ret == (struct elf_cris_link_hash_entry *) NULL)
815 return (struct bfd_hash_entry *) ret;
816
817 /* Call the allocation method of the superclass. */
818 ret = ((struct elf_cris_link_hash_entry *)
819 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
820 table, string));
821 if (ret != (struct elf_cris_link_hash_entry *) NULL)
822 {
823 ret->pcrel_relocs_copied = NULL;
824 ret->gotplt_refcount = 0;
825 ret->gotplt_offset = 0;
826 }
827
828 return (struct bfd_hash_entry *) ret;
829 }
830
831 /* Create a CRIS ELF linker hash table. */
832
833 static struct bfd_link_hash_table *
834 elf_cris_link_hash_table_create (abfd)
835 bfd *abfd;
836 {
837 struct elf_cris_link_hash_table *ret;
838 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
839
840 ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
841 if (ret == (struct elf_cris_link_hash_table *) NULL)
842 return NULL;
843
844 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
845 elf_cris_link_hash_newfunc,
846 sizeof (struct elf_cris_link_hash_entry)))
847 {
848 free (ret);
849 return NULL;
850 }
851
852 /* Initialize to skip over the first three entries in the gotplt; they
853 are used for run-time symbol evaluation. */
854 ret->next_gotplt_entry = 12;
855
856 return &ret->root.root;
857 }
858 \f
859 /* Perform a single relocation. By default we use the standard BFD
860 routines, with a few tweaks. */
861
862 static bfd_reloc_status_type
863 cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
864 relocation)
865 reloc_howto_type * howto;
866 bfd * input_bfd;
867 asection * input_section;
868 bfd_byte * contents;
869 Elf_Internal_Rela * rel;
870 bfd_vma relocation;
871 {
872 bfd_reloc_status_type r;
873
874 /* PC-relative relocations are relative to the position *after*
875 the reloc. Note that for R_CRIS_8_PCREL the adjustment is
876 not a single byte, since PC must be 16-bit-aligned. */
877 switch (ELF32_R_TYPE (rel->r_info))
878 {
879 /* Check that the 16-bit GOT relocs are positive. */
880 case R_CRIS_16_GOTPLT:
881 case R_CRIS_16_GOT:
882 if ((bfd_signed_vma) relocation < 0)
883 return bfd_reloc_overflow;
884 break;
885
886 case R_CRIS_32_PLT_PCREL:
887 case R_CRIS_32_PCREL:
888 relocation -= 2;
889 /* Fall through. */
890 case R_CRIS_8_PCREL:
891 case R_CRIS_16_PCREL:
892 relocation -= 2;
893 break;
894
895 default:
896 break;
897 }
898
899 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
900 contents, rel->r_offset,
901 relocation, rel->r_addend);
902 return r;
903 }
904 \f
905 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
906 copied, for further comments. */
907
908 static bfd_boolean
909 cris_elf_relocate_section (output_bfd, info, input_bfd, input_section,
910 contents, relocs, local_syms, local_sections)
911 bfd *output_bfd ATTRIBUTE_UNUSED;
912 struct bfd_link_info *info;
913 bfd *input_bfd;
914 asection *input_section;
915 bfd_byte *contents;
916 Elf_Internal_Rela *relocs;
917 Elf_Internal_Sym *local_syms;
918 asection **local_sections;
919 {
920 bfd *dynobj;
921 Elf_Internal_Shdr *symtab_hdr;
922 struct elf_link_hash_entry **sym_hashes;
923 bfd_vma *local_got_offsets;
924 asection *sgot;
925 asection *splt;
926 asection *sreloc;
927 Elf_Internal_Rela *rel;
928 Elf_Internal_Rela *relend;
929
930 dynobj = elf_hash_table (info)->dynobj;
931 local_got_offsets = elf_local_got_offsets (input_bfd);
932 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
933 sym_hashes = elf_sym_hashes (input_bfd);
934 relend = relocs + input_section->reloc_count;
935
936 sgot = NULL;
937 splt = NULL;
938 sreloc = NULL;
939
940 if (dynobj != NULL)
941 {
942 splt = bfd_get_section_by_name (dynobj, ".plt");
943 sgot = bfd_get_section_by_name (dynobj, ".got");
944 }
945
946 for (rel = relocs; rel < relend; rel ++)
947 {
948 reloc_howto_type *howto;
949 unsigned long r_symndx;
950 Elf_Internal_Sym *sym;
951 asection *sec;
952 struct elf_link_hash_entry *h;
953 bfd_vma relocation;
954 bfd_reloc_status_type r;
955 const char *symname = NULL;
956 int r_type;
957
958 r_type = ELF32_R_TYPE (rel->r_info);
959
960 if ( r_type == R_CRIS_GNU_VTINHERIT
961 || r_type == R_CRIS_GNU_VTENTRY)
962 continue;
963
964 r_symndx = ELF32_R_SYM (rel->r_info);
965 howto = cris_elf_howto_table + r_type;
966 h = NULL;
967 sym = NULL;
968 sec = NULL;
969
970 if (r_symndx < symtab_hdr->sh_info)
971 {
972 sym = local_syms + r_symndx;
973 sec = local_sections [r_symndx];
974 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
975
976 symname = (bfd_elf_string_from_elf_section
977 (input_bfd, symtab_hdr->sh_link, sym->st_name));
978 if (symname == NULL)
979 symname = bfd_section_name (input_bfd, sec);
980 }
981 else
982 {
983 bfd_boolean warned;
984 bfd_boolean unresolved_reloc;
985
986 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
987 r_symndx, symtab_hdr, sym_hashes,
988 h, sec, relocation,
989 unresolved_reloc, warned);
990
991 if (unresolved_reloc
992 /* Perhaps we should detect the cases that
993 sec->output_section is expected to be NULL like i386 and
994 m68k, but apparently (and according to elfxx-ia64.c) all
995 valid cases are where the symbol is defined in a shared
996 object which we link dynamically against. This includes
997 PLT relocs for which we've created a PLT entry and other
998 relocs for which we're prepared to create dynamic
999 relocations.
1000
1001 For now, new situations cause us to just err when
1002 sec->output_offset is NULL but the object with the symbol
1003 is *not* dynamically linked against. Thus this will
1004 automatically remind us so we can see if there are other
1005 valid cases we need to revisit. */
1006 && (sec->owner->flags & DYNAMIC) != 0)
1007 relocation = 0;
1008
1009 else if (h->root.type == bfd_link_hash_defined
1010 || h->root.type == bfd_link_hash_defweak)
1011 {
1012 /* Here follow the cases where the relocation value must
1013 be zero (or when further handling is simplified when
1014 zero). I can't claim to understand the various
1015 conditions and they weren't described in the files
1016 where I copied them from (elf32-m68k.c and
1017 elf32-i386.c), but let's mention examples of where
1018 they happen. FIXME: Perhaps define and use a
1019 dynamic_symbol_p function like ia64.
1020
1021 - When creating a shared library, we can have an
1022 ordinary relocation for a symbol defined in a shared
1023 library (perhaps the one we create). We then make
1024 the relocation value zero, as the value seen now will
1025 be added into the relocation addend in this shared
1026 library, but must be handled only at dynamic-link
1027 time. FIXME: Not sure this example covers the
1028 h->elf_link_hash_flags test, though it's there in
1029 other targets. */
1030 if (info->shared
1031 && ((! info->symbolic && h->dynindx != -1)
1032 || !h->def_regular)
1033 && (input_section->flags & SEC_ALLOC) != 0
1034 && (r_type == R_CRIS_8
1035 || r_type == R_CRIS_16
1036 || r_type == R_CRIS_32
1037 || r_type == R_CRIS_8_PCREL
1038 || r_type == R_CRIS_16_PCREL
1039 || r_type == R_CRIS_32_PCREL))
1040 relocation = 0;
1041 else if (!info->relocatable && unresolved_reloc)
1042 {
1043 _bfd_error_handler
1044 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1045 input_bfd,
1046 input_section,
1047 cris_elf_howto_table[r_type].name,
1048 symname);
1049 bfd_set_error (bfd_error_bad_value);
1050 return FALSE;
1051 }
1052 }
1053 }
1054
1055 if (sec != NULL && elf_discarded_section (sec))
1056 {
1057 /* For relocs against symbols from removed linkonce sections,
1058 or sections discarded by a linker script, we just want the
1059 section contents zeroed. Avoid any special processing. */
1060 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1061 rel->r_info = 0;
1062 rel->r_addend = 0;
1063 continue;
1064 }
1065
1066 if (info->relocatable)
1067 continue;
1068
1069 switch (r_type)
1070 {
1071 case R_CRIS_16_GOTPLT:
1072 case R_CRIS_32_GOTPLT:
1073 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1074 but we require a PLT, and the PLT handling will take care of
1075 filling in the PLT-specific GOT entry. For the GOT offset,
1076 calculate it as we do when filling it in for the .got.plt
1077 section. If we don't have a PLT, punt to GOT handling. */
1078 if (h != NULL
1079 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1080 {
1081 asection *sgotplt
1082 = bfd_get_section_by_name (dynobj, ".got.plt");
1083 bfd_vma got_offset;
1084
1085 BFD_ASSERT (h->dynindx != -1);
1086 BFD_ASSERT (sgotplt != NULL);
1087
1088 got_offset
1089 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1090
1091 relocation = got_offset;
1092 break;
1093 }
1094
1095 /* We didn't make a PLT entry for this symbol. Maybe everything is
1096 folded into the GOT. Other than folding, this happens when
1097 statically linking PIC code, or when using -Bsymbolic. Check
1098 that we instead have a GOT entry as done for us by
1099 elf_cris_adjust_dynamic_symbol, and drop through into the
1100 ordinary GOT cases. This must not happen for the
1101 executable, because any reference it does to a function
1102 that is satisfied by a DSO must generate a PLT. We assume
1103 these call-specific relocs don't address non-functions. */
1104 if (h != NULL
1105 && (h->got.offset == (bfd_vma) -1
1106 || (!info->shared
1107 && !(h->def_regular
1108 || (!h->def_dynamic
1109 && h->root.type == bfd_link_hash_undefweak)))))
1110 {
1111 (*_bfd_error_handler)
1112 ((h->got.offset == (bfd_vma) -1)
1113 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1114 " against symbol `%s'")
1115 : _("%B, section %A: No PLT for relocation %s"
1116 " against symbol `%s'"),
1117 input_bfd,
1118 input_section,
1119 cris_elf_howto_table[r_type].name,
1120 (symname != NULL && symname[0] != '\0'
1121 ? symname : _("[whose name is lost]")));
1122
1123 /* FIXME: Perhaps blaming input is not the right thing to
1124 do; this is probably an internal error. But it is true
1125 that we didn't like that particular input. */
1126 bfd_set_error (bfd_error_bad_value);
1127 return FALSE;
1128 }
1129 /* Fall through. */
1130
1131 /* The size of the actual relocation is not used here; we only
1132 fill in the GOT table here. */
1133 case R_CRIS_16_GOT:
1134 case R_CRIS_32_GOT:
1135 {
1136 bfd_vma off;
1137
1138 /* Note that despite using RELA relocations, the .got contents
1139 is always filled in with the link-relative relocation
1140 value; the addend. */
1141
1142 if (h != NULL)
1143 {
1144 off = h->got.offset;
1145 BFD_ASSERT (off != (bfd_vma) -1);
1146
1147 if (!elf_hash_table (info)->dynamic_sections_created
1148 || (! info->shared
1149 && (h->def_regular
1150 || h->type == STT_FUNC
1151 || h->needs_plt))
1152 || (info->shared
1153 && (info->symbolic || h->dynindx == -1)
1154 && h->def_regular))
1155 {
1156 /* This wasn't checked above for ! info->shared, but
1157 must hold there if we get here; the symbol must
1158 be defined in the regular program or be undefweak
1159 or be a function or otherwise need a PLT. */
1160 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1161 || info->shared
1162 || h->def_regular
1163 || h->type == STT_FUNC
1164 || h->needs_plt
1165 || h->root.type == bfd_link_hash_undefweak);
1166
1167 /* This is actually a static link, or it is a
1168 -Bsymbolic link and the symbol is defined locally,
1169 or is undefweak, or the symbol was forced to be
1170 local because of a version file, or we're not
1171 creating a dynamic object. We must initialize this
1172 entry in the global offset table. Since the offset
1173 must always be a multiple of 4, we use the least
1174 significant bit to record whether we have
1175 initialized it already.
1176
1177 If this GOT entry should be runtime-initialized, we
1178 will create a .rela.got relocation entry to
1179 initialize the value. This is done in the
1180 finish_dynamic_symbol routine. */
1181 if ((off & 1) != 0)
1182 off &= ~1;
1183 else
1184 {
1185 bfd_put_32 (output_bfd, relocation,
1186 sgot->contents + off);
1187 h->got.offset |= 1;
1188 }
1189 }
1190 }
1191 else
1192 {
1193 BFD_ASSERT (local_got_offsets != NULL
1194 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1195
1196 off = local_got_offsets[r_symndx];
1197
1198 /* The offset must always be a multiple of 4. We use
1199 the least significant bit to record whether we have
1200 already generated the necessary reloc. */
1201 if ((off & 1) != 0)
1202 off &= ~1;
1203 else
1204 {
1205 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1206
1207 if (info->shared)
1208 {
1209 asection *s;
1210 Elf_Internal_Rela outrel;
1211 bfd_byte *loc;
1212
1213 s = bfd_get_section_by_name (dynobj, ".rela.got");
1214 BFD_ASSERT (s != NULL);
1215
1216 outrel.r_offset = (sgot->output_section->vma
1217 + sgot->output_offset
1218 + off);
1219 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1220 outrel.r_addend = relocation;
1221 loc = s->contents;
1222 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1223 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1224 }
1225
1226 local_got_offsets[r_symndx] |= 1;
1227 }
1228 }
1229
1230 relocation = sgot->output_offset + off;
1231 if (rel->r_addend != 0)
1232 {
1233 /* We can't do anything for a relocation which is against
1234 a symbol *plus offset*. GOT holds relocations for
1235 symbols. Make this an error; the compiler isn't
1236 allowed to pass us these kinds of things. */
1237 if (h == NULL)
1238 (*_bfd_error_handler)
1239 (_("%B, section %A: relocation %s with non-zero addend %d"
1240 " against local symbol"),
1241 input_bfd,
1242 input_section,
1243 cris_elf_howto_table[r_type].name,
1244 rel->r_addend);
1245 else
1246 (*_bfd_error_handler)
1247 (_("%B, section %A: relocation %s with non-zero addend %d"
1248 " against symbol `%s'"),
1249 input_bfd,
1250 input_section,
1251 cris_elf_howto_table[r_type].name,
1252 rel->r_addend,
1253 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1254
1255 bfd_set_error (bfd_error_bad_value);
1256 return FALSE;
1257 }
1258 }
1259 break;
1260
1261 case R_CRIS_32_GOTREL:
1262 /* This relocation must only be performed against local symbols.
1263 It's also ok when we link a program and the symbol is either
1264 defined in an ordinary (non-DSO) object or is undefined weak. */
1265 if (h != NULL
1266 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1267 && !(!info->shared
1268 && (h->def_regular
1269 || (!h->def_dynamic
1270 && h->root.type == bfd_link_hash_undefweak))))
1271 {
1272 (*_bfd_error_handler)
1273 (_("%B, section %A: relocation %s is"
1274 " not allowed for global symbol: `%s'"),
1275 input_bfd,
1276 input_section,
1277 cris_elf_howto_table[r_type].name,
1278 symname);
1279 bfd_set_error (bfd_error_bad_value);
1280 return FALSE;
1281 }
1282
1283 /* This can happen if we get a link error with the input ELF
1284 variant mismatching the output variant. Emit an error so
1285 it's noticed if it happens elsewhere. */
1286 if (sgot == NULL)
1287 {
1288 (*_bfd_error_handler)
1289 (_("%B, section %A: relocation %s with no GOT created"),
1290 input_bfd,
1291 input_section,
1292 cris_elf_howto_table[r_type].name);
1293 bfd_set_error (bfd_error_bad_value);
1294 return FALSE;
1295 }
1296
1297 /* This relocation is like a PC-relative one, except the
1298 reference point is the location of GOT. Note that
1299 sgot->output_offset is not involved in this calculation. We
1300 always want the start of entire .got section, not the
1301 position after the reserved header. */
1302 relocation -= sgot->output_section->vma;
1303 break;
1304
1305 case R_CRIS_32_PLT_PCREL:
1306 /* Relocation is to the entry for this symbol in the
1307 procedure linkage table. */
1308
1309 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1310 without using the procedure linkage table. */
1311 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1312 break;
1313
1314 if (h->plt.offset == (bfd_vma) -1
1315 || splt == NULL)
1316 {
1317 /* We didn't make a PLT entry for this symbol. This
1318 happens when statically linking PIC code, or when
1319 using -Bsymbolic. */
1320 break;
1321 }
1322
1323 relocation = (splt->output_section->vma
1324 + splt->output_offset
1325 + h->plt.offset);
1326 break;
1327
1328 case R_CRIS_32_PLT_GOTREL:
1329 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1330 start of the .got section. See also comment at
1331 R_CRIS_32_GOT. */
1332 relocation -= sgot->output_section->vma;
1333
1334 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1335 without using the procedure linkage table. */
1336 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1337 break;
1338
1339 if (h->plt.offset == (bfd_vma) -1
1340 || splt == NULL)
1341 {
1342 /* We didn't make a PLT entry for this symbol. This
1343 happens when statically linking PIC code, or when
1344 using -Bsymbolic. */
1345 break;
1346 }
1347
1348 relocation = (splt->output_section->vma
1349 + splt->output_offset
1350 + h->plt.offset
1351 - sgot->output_section->vma);
1352 break;
1353
1354 case R_CRIS_8_PCREL:
1355 case R_CRIS_16_PCREL:
1356 case R_CRIS_32_PCREL:
1357 /* If the symbol was local, we need no shlib-specific handling. */
1358 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1359 break;
1360
1361 /* Fall through. */
1362 case R_CRIS_8:
1363 case R_CRIS_16:
1364 case R_CRIS_32:
1365 if (info->shared
1366 && r_symndx != 0
1367 && (input_section->flags & SEC_ALLOC) != 0
1368 && ((r_type != R_CRIS_8_PCREL
1369 && r_type != R_CRIS_16_PCREL
1370 && r_type != R_CRIS_32_PCREL)
1371 || (!info->symbolic
1372 || !h->def_regular)))
1373 {
1374 Elf_Internal_Rela outrel;
1375 bfd_byte *loc;
1376 bfd_boolean skip, relocate;
1377
1378 /* When generating a shared object, these relocations
1379 are copied into the output file to be resolved at run
1380 time. */
1381
1382 if (sreloc == NULL)
1383 {
1384 const char *name;
1385
1386 name = (bfd_elf_string_from_elf_section
1387 (input_bfd,
1388 elf_elfheader (input_bfd)->e_shstrndx,
1389 elf_section_data (input_section)->rel_hdr.sh_name));
1390 if (name == NULL)
1391 return FALSE;
1392
1393 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
1394 && strcmp (bfd_get_section_name (input_bfd,
1395 input_section),
1396 name + 5) == 0);
1397
1398 sreloc = bfd_get_section_by_name (dynobj, name);
1399
1400 /* That section should have been created in
1401 cris_elf_check_relocs, but that function will not be
1402 called for objects which fail in
1403 cris_elf_merge_private_bfd_data. */
1404 if (sreloc == NULL)
1405 {
1406 (*_bfd_error_handler)
1407 (_("%B: Internal inconsistency; no relocation section %s"),
1408 input_bfd,
1409 name);
1410
1411 bfd_set_error (bfd_error_bad_value);
1412 return FALSE;
1413 }
1414 }
1415
1416 skip = FALSE;
1417 relocate = FALSE;
1418
1419 outrel.r_offset =
1420 _bfd_elf_section_offset (output_bfd, info, input_section,
1421 rel->r_offset);
1422 if (outrel.r_offset == (bfd_vma) -1)
1423 skip = TRUE;
1424 else if (outrel.r_offset == (bfd_vma) -2)
1425 skip = TRUE, relocate = TRUE;
1426 outrel.r_offset += (input_section->output_section->vma
1427 + input_section->output_offset);
1428
1429 if (skip)
1430 memset (&outrel, 0, sizeof outrel);
1431 /* h->dynindx may be -1 if the symbol was marked to
1432 become local. */
1433 else if (h != NULL
1434 && ((! info->symbolic && h->dynindx != -1)
1435 || !h->def_regular))
1436 {
1437 BFD_ASSERT (h->dynindx != -1);
1438 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1439 outrel.r_addend = relocation + rel->r_addend;
1440 }
1441 else
1442 {
1443 outrel.r_addend = relocation + rel->r_addend;
1444
1445 if (r_type == R_CRIS_32)
1446 {
1447 relocate = TRUE;
1448 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1449 }
1450 else
1451 {
1452 long indx;
1453
1454 if (bfd_is_abs_section (sec))
1455 indx = 0;
1456 else if (sec == NULL || sec->owner == NULL)
1457 {
1458 bfd_set_error (bfd_error_bad_value);
1459 return FALSE;
1460 }
1461 else
1462 {
1463 asection *osec;
1464
1465 /* We are turning this relocation into one
1466 against a section symbol. It would be
1467 proper to subtract the symbol's value,
1468 osec->vma, from the emitted reloc addend,
1469 but ld.so expects buggy relocs. */
1470 osec = sec->output_section;
1471 indx = elf_section_data (osec)->dynindx;
1472 if (indx == 0)
1473 {
1474 struct elf_cris_link_hash_table *htab;
1475 htab = elf_cris_hash_table (info);
1476 osec = htab->root.text_index_section;
1477 indx = elf_section_data (osec)->dynindx;
1478 }
1479 BFD_ASSERT (indx != 0);
1480 }
1481
1482 outrel.r_info = ELF32_R_INFO (indx, r_type);
1483 }
1484 }
1485
1486 loc = sreloc->contents;
1487 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1488 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1489
1490 /* This reloc will be computed at runtime, so there's no
1491 need to do anything now, except for R_CRIS_32 relocations
1492 that have been turned into R_CRIS_RELATIVE. */
1493 if (!relocate)
1494 continue;
1495 }
1496
1497 break;
1498 }
1499
1500 r = cris_final_link_relocate (howto, input_bfd, input_section,
1501 contents, rel, relocation);
1502
1503 if (r != bfd_reloc_ok)
1504 {
1505 const char * msg = (const char *) NULL;
1506
1507 switch (r)
1508 {
1509 case bfd_reloc_overflow:
1510 r = info->callbacks->reloc_overflow
1511 (info, (h ? &h->root : NULL), symname, howto->name,
1512 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1513 break;
1514
1515 case bfd_reloc_undefined:
1516 r = info->callbacks->undefined_symbol
1517 (info, symname, input_bfd, input_section, rel->r_offset,
1518 TRUE);
1519 break;
1520
1521 case bfd_reloc_outofrange:
1522 msg = _("internal error: out of range error");
1523 break;
1524
1525 case bfd_reloc_notsupported:
1526 msg = _("internal error: unsupported relocation error");
1527 break;
1528
1529 case bfd_reloc_dangerous:
1530 msg = _("internal error: dangerous relocation");
1531 break;
1532
1533 default:
1534 msg = _("internal error: unknown error");
1535 break;
1536 }
1537
1538 if (msg)
1539 r = info->callbacks->warning
1540 (info, msg, symname, input_bfd, input_section, rel->r_offset);
1541
1542 if (! r)
1543 return FALSE;
1544 }
1545 }
1546
1547 return TRUE;
1548 }
1549 \f
1550 /* Finish up dynamic symbol handling. We set the contents of various
1551 dynamic sections here. */
1552
1553 static bfd_boolean
1554 elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym)
1555 bfd *output_bfd;
1556 struct bfd_link_info *info;
1557 struct elf_link_hash_entry *h;
1558 Elf_Internal_Sym *sym;
1559 {
1560 bfd *dynobj;
1561
1562 /* Where in the plt entry to put values. */
1563 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
1564
1565 /* What offset to add to the distance to the first PLT entry for the
1566 value at plt_off3. */
1567 int plt_off3_value_bias = 4;
1568
1569 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
1570 for PIC and non-PIC for v32 and pre-v32). */
1571 int plt_stub_offset = 8;
1572 int plt_entry_size = PLT_ENTRY_SIZE;
1573 const bfd_byte *plt_entry = elf_cris_plt_entry;
1574 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
1575
1576 /* Adjust the various PLT entry offsets. */
1577 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1578 {
1579 plt_off2 = 14;
1580 plt_off3 = 20;
1581 plt_off3_value_bias = -2;
1582 plt_stub_offset = 12;
1583 plt_entry_size = PLT_ENTRY_SIZE_V32;
1584 plt_entry = elf_cris_plt_entry_v32;
1585 plt_pic_entry = elf_cris_pic_plt_entry_v32;
1586 }
1587
1588 dynobj = elf_hash_table (info)->dynobj;
1589
1590 if (h->plt.offset != (bfd_vma) -1)
1591 {
1592 asection *splt;
1593 asection *sgotplt;
1594 asection *sgot;
1595 asection *srela;
1596 bfd_vma got_base;
1597
1598 bfd_vma gotplt_offset
1599 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1600 Elf_Internal_Rela rela;
1601 bfd_byte *loc;
1602 bfd_boolean has_gotplt = gotplt_offset != 0;
1603
1604 /* Get the index in the procedure linkage table which
1605 corresponds to this symbol. This is the index of this symbol
1606 in all the symbols for which we are making plt entries. The
1607 first entry in the procedure linkage table is reserved. */
1608 /* We have to count backwards here, and the result is only valid as
1609 an index into .got.plt and its relocations. FIXME: Constants... */
1610 bfd_vma gotplt_index = gotplt_offset/4 - 3;
1611
1612 /* Get the offset into the .got table of the entry that corresponds
1613 to this function. Note that we embed knowledge that "incoming"
1614 .got goes after .got.plt in the output without padding (pointer
1615 aligned). However, that knowledge is present in several other
1616 places too. */
1617 bfd_vma got_offset
1618 = (has_gotplt
1619 ? gotplt_offset
1620 : h->got.offset + elf_cris_hash_table(info)->next_gotplt_entry);
1621
1622 /* This symbol has an entry in the procedure linkage table. Set it
1623 up. */
1624
1625 BFD_ASSERT (h->dynindx != -1);
1626
1627 splt = bfd_get_section_by_name (dynobj, ".plt");
1628 sgot = bfd_get_section_by_name (dynobj, ".got");
1629 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1630 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1631 BFD_ASSERT (splt != NULL && sgotplt != NULL
1632 && (! has_gotplt || srela != NULL));
1633
1634 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
1635
1636 /* Fill in the entry in the procedure linkage table. */
1637 if (! info->shared)
1638 {
1639 memcpy (splt->contents + h->plt.offset, plt_entry,
1640 plt_entry_size);
1641
1642 /* We need to enter the absolute address of the GOT entry here. */
1643 bfd_put_32 (output_bfd, got_base + got_offset,
1644 splt->contents + h->plt.offset + plt_off1);
1645 }
1646 else
1647 {
1648 memcpy (splt->contents + h->plt.offset, plt_pic_entry,
1649 plt_entry_size);
1650 bfd_put_32 (output_bfd, got_offset,
1651 splt->contents + h->plt.offset + plt_off1);
1652 }
1653
1654 /* Fill in the plt entry and make a relocation, if this is a "real"
1655 PLT entry. */
1656 if (has_gotplt)
1657 {
1658 /* Fill in the offset to the reloc table. */
1659 bfd_put_32 (output_bfd,
1660 gotplt_index * sizeof (Elf32_External_Rela),
1661 splt->contents + h->plt.offset + plt_off2);
1662
1663 /* Fill in the offset to the first PLT entry, where to "jump". */
1664 bfd_put_32 (output_bfd,
1665 - (h->plt.offset + plt_off3 + plt_off3_value_bias),
1666 splt->contents + h->plt.offset + plt_off3);
1667
1668 /* Fill in the entry in the global offset table with the address of
1669 the relocating stub. */
1670 bfd_put_32 (output_bfd,
1671 (splt->output_section->vma
1672 + splt->output_offset
1673 + h->plt.offset
1674 + plt_stub_offset),
1675 sgotplt->contents + got_offset);
1676
1677 /* Fill in the entry in the .rela.plt section. */
1678 rela.r_offset = (sgotplt->output_section->vma
1679 + sgotplt->output_offset
1680 + got_offset);
1681 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
1682 rela.r_addend = 0;
1683 loc = srela->contents + gotplt_index * sizeof (Elf32_External_Rela);
1684 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1685 }
1686
1687 if (!h->def_regular)
1688 {
1689 /* Mark the symbol as undefined, rather than as defined in
1690 the .plt section. Leave the value alone. */
1691 sym->st_shndx = SHN_UNDEF;
1692
1693 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
1694 know whether resetting the value is significant; if it really
1695 is, rather than a quirk or bug in the sparc port, then I
1696 believe we'd see this elsewhere. */
1697 /* If the symbol is weak, we do need to clear the value.
1698 Otherwise, the PLT entry would provide a definition for
1699 the symbol even if the symbol wasn't defined anywhere,
1700 and so the symbol would never be NULL. */
1701 if (!h->ref_regular_nonweak)
1702 sym->st_value = 0;
1703 }
1704 }
1705
1706 /* For an ordinary program, we emit .got relocs only for symbols that
1707 are in the dynamic-symbols table and are either defined by the
1708 program or are undefined weak symbols, or are function symbols
1709 where we do not output a PLT: the PLT reloc was output above and all
1710 references to the function symbol are redirected to the PLT. */
1711 if (h->got.offset != (bfd_vma) -1
1712 && (info->shared
1713 || (h->dynindx != -1
1714 && h->plt.offset == (bfd_vma) -1
1715 && !h->def_regular
1716 && h->root.type != bfd_link_hash_undefweak)))
1717 {
1718 asection *sgot;
1719 asection *srela;
1720 Elf_Internal_Rela rela;
1721 bfd_byte *loc;
1722 bfd_byte *where;
1723
1724 /* This symbol has an entry in the global offset table. Set it up. */
1725
1726 sgot = bfd_get_section_by_name (dynobj, ".got");
1727 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1728 BFD_ASSERT (sgot != NULL && srela != NULL);
1729
1730 rela.r_offset = (sgot->output_section->vma
1731 + sgot->output_offset
1732 + (h->got.offset &~ (bfd_vma) 1));
1733
1734 /* If this is a static link, or it is a -Bsymbolic link and the
1735 symbol is defined locally or was forced to be local because
1736 of a version file, we just want to emit a RELATIVE reloc.
1737 The entry in the global offset table will already have been
1738 initialized in the relocate_section function. */
1739 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
1740 if (! elf_hash_table (info)->dynamic_sections_created
1741 || (info->shared
1742 && (info->symbolic || h->dynindx == -1)
1743 && h->def_regular))
1744 {
1745 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1746 rela.r_addend = bfd_get_signed_32 (output_bfd, where);
1747 }
1748 else
1749 {
1750 bfd_put_32 (output_bfd, (bfd_vma) 0, where);
1751 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
1752 rela.r_addend = 0;
1753 }
1754
1755 loc = srela->contents;
1756 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1757 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1758 }
1759
1760 if (h->needs_copy)
1761 {
1762 asection *s;
1763 Elf_Internal_Rela rela;
1764 bfd_byte *loc;
1765
1766 /* This symbol needs a copy reloc. Set it up. */
1767
1768 BFD_ASSERT (h->dynindx != -1
1769 && (h->root.type == bfd_link_hash_defined
1770 || h->root.type == bfd_link_hash_defweak));
1771
1772 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1773 ".rela.bss");
1774 BFD_ASSERT (s != NULL);
1775
1776 rela.r_offset = (h->root.u.def.value
1777 + h->root.u.def.section->output_section->vma
1778 + h->root.u.def.section->output_offset);
1779 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
1780 rela.r_addend = 0;
1781 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1782 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1783 }
1784
1785 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1786 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1787 || h == elf_hash_table (info)->hgot)
1788 sym->st_shndx = SHN_ABS;
1789
1790 return TRUE;
1791 }
1792 \f
1793 /* Finish up the dynamic sections. */
1794
1795 static bfd_boolean
1796 elf_cris_finish_dynamic_sections (output_bfd, info)
1797 bfd *output_bfd;
1798 struct bfd_link_info *info;
1799 {
1800 bfd *dynobj;
1801 asection *sgot;
1802 asection *sdyn;
1803
1804 dynobj = elf_hash_table (info)->dynobj;
1805
1806 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1807 BFD_ASSERT (sgot != NULL);
1808 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1809
1810 if (elf_hash_table (info)->dynamic_sections_created)
1811 {
1812 asection *splt;
1813 Elf32_External_Dyn *dyncon, *dynconend;
1814
1815 splt = bfd_get_section_by_name (dynobj, ".plt");
1816 BFD_ASSERT (splt != NULL && sdyn != NULL);
1817
1818 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1819 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1820 for (; dyncon < dynconend; dyncon++)
1821 {
1822 Elf_Internal_Dyn dyn;
1823 asection *s;
1824
1825 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1826
1827 switch (dyn.d_tag)
1828 {
1829 default:
1830 break;
1831
1832 case DT_PLTGOT:
1833 s = bfd_get_section_by_name (output_bfd, ".got");
1834 BFD_ASSERT (s != NULL);
1835 dyn.d_un.d_ptr = s->vma;
1836 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1837 break;
1838
1839 case DT_JMPREL:
1840 /* Yes, we *can* have a .plt and no .plt.rela, for instance
1841 if all symbols are found in the .got (not .got.plt). */
1842 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1843 dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
1844 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1845 break;
1846
1847 case DT_PLTRELSZ:
1848 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1849 if (s == NULL)
1850 dyn.d_un.d_val = 0;
1851 else
1852 dyn.d_un.d_val = s->size;
1853 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1854 break;
1855
1856 case DT_RELASZ:
1857 /* The procedure linkage table relocs (DT_JMPREL) should
1858 not be included in the overall relocs (DT_RELA).
1859 Therefore, we override the DT_RELASZ entry here to
1860 make it not include the JMPREL relocs. Since the
1861 linker script arranges for .rela.plt to follow all
1862 other relocation sections, we don't have to worry
1863 about changing the DT_RELA entry. */
1864 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1865 if (s != NULL)
1866 dyn.d_un.d_val -= s->size;
1867 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1868 break;
1869 }
1870 }
1871
1872 /* Fill in the first entry in the procedure linkage table. */
1873 if (splt->size > 0)
1874 {
1875 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1876 {
1877 if (info->shared)
1878 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
1879 PLT_ENTRY_SIZE_V32);
1880 else
1881 {
1882 memcpy (splt->contents, elf_cris_plt0_entry_v32,
1883 PLT_ENTRY_SIZE_V32);
1884 bfd_put_32 (output_bfd,
1885 sgot->output_section->vma
1886 + sgot->output_offset + 4,
1887 splt->contents + 4);
1888
1889 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1890 = PLT_ENTRY_SIZE_V32;
1891 }
1892 }
1893 else
1894 {
1895 if (info->shared)
1896 memcpy (splt->contents, elf_cris_pic_plt0_entry,
1897 PLT_ENTRY_SIZE);
1898 else
1899 {
1900 memcpy (splt->contents, elf_cris_plt0_entry,
1901 PLT_ENTRY_SIZE);
1902 bfd_put_32 (output_bfd,
1903 sgot->output_section->vma
1904 + sgot->output_offset + 4,
1905 splt->contents + 6);
1906 bfd_put_32 (output_bfd,
1907 sgot->output_section->vma
1908 + sgot->output_offset + 8,
1909 splt->contents + 14);
1910
1911 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1912 = PLT_ENTRY_SIZE;
1913 }
1914 }
1915 }
1916 }
1917
1918 /* Fill in the first three entries in the global offset table. */
1919 if (sgot->size > 0)
1920 {
1921 if (sdyn == NULL)
1922 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1923 else
1924 bfd_put_32 (output_bfd,
1925 sdyn->output_section->vma + sdyn->output_offset,
1926 sgot->contents);
1927 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1928 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1929 }
1930
1931 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1932
1933 return TRUE;
1934 }
1935 \f
1936 /* Return the section that should be marked against GC for a given
1937 relocation. */
1938
1939 static asection *
1940 cris_elf_gc_mark_hook (asection *sec,
1941 struct bfd_link_info *info,
1942 Elf_Internal_Rela *rel,
1943 struct elf_link_hash_entry *h,
1944 Elf_Internal_Sym *sym)
1945 {
1946 if (h != NULL)
1947 switch (ELF32_R_TYPE (rel->r_info))
1948 {
1949 case R_CRIS_GNU_VTINHERIT:
1950 case R_CRIS_GNU_VTENTRY:
1951 return NULL;
1952 }
1953
1954 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1955 }
1956
1957 /* Update the got entry reference counts for the section being removed. */
1958
1959 static bfd_boolean
1960 cris_elf_gc_sweep_hook (bfd *abfd,
1961 struct bfd_link_info *info,
1962 asection *sec,
1963 const Elf_Internal_Rela *relocs)
1964 {
1965 Elf_Internal_Shdr *symtab_hdr;
1966 struct elf_link_hash_entry **sym_hashes;
1967 bfd_signed_vma *local_got_refcounts;
1968 const Elf_Internal_Rela *rel, *relend;
1969 bfd *dynobj;
1970 asection *sgot;
1971 asection *srelgot;
1972
1973 dynobj = elf_hash_table (info)->dynobj;
1974 if (dynobj == NULL)
1975 return TRUE;
1976
1977 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1978 sym_hashes = elf_sym_hashes (abfd);
1979 local_got_refcounts = elf_local_got_refcounts (abfd);
1980
1981 sgot = bfd_get_section_by_name (dynobj, ".got");
1982 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1983
1984 relend = relocs + sec->reloc_count;
1985 for (rel = relocs; rel < relend; rel++)
1986 {
1987 unsigned long r_symndx;
1988 struct elf_link_hash_entry *h = NULL;
1989
1990 r_symndx = ELF32_R_SYM (rel->r_info);
1991 if (r_symndx >= symtab_hdr->sh_info)
1992 {
1993 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1994 while (h->root.type == bfd_link_hash_indirect
1995 || h->root.type == bfd_link_hash_warning)
1996 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1997 }
1998
1999 switch (ELF32_R_TYPE (rel->r_info))
2000 {
2001 case R_CRIS_16_GOT:
2002 case R_CRIS_32_GOT:
2003 if (h != NULL)
2004 {
2005 if (h->got.refcount > 0)
2006 {
2007 --h->got.refcount;
2008 if (h->got.refcount == 0)
2009 {
2010 /* We don't need the .got entry any more. */
2011 sgot->size -= 4;
2012 srelgot->size -= sizeof (Elf32_External_Rela);
2013 }
2014 }
2015 break;
2016 }
2017
2018 local_got_reloc:
2019 if (local_got_refcounts != NULL)
2020 {
2021 if (local_got_refcounts[r_symndx] > 0)
2022 {
2023 --local_got_refcounts[r_symndx];
2024 if (local_got_refcounts[r_symndx] == 0)
2025 {
2026 /* We don't need the .got entry any more. */
2027 sgot->size -= 4;
2028 if (info->shared)
2029 srelgot->size -= sizeof (Elf32_External_Rela);
2030 }
2031 }
2032 }
2033 break;
2034
2035 case R_CRIS_16_GOTPLT:
2036 case R_CRIS_32_GOTPLT:
2037 /* For local symbols, treat these like GOT relocs. */
2038 if (h == NULL)
2039 goto local_got_reloc;
2040 /* Fall through. */
2041
2042 case R_CRIS_32_PLT_GOTREL:
2043 /* FIXME: We don't garbage-collect away the .got section. */
2044 if (local_got_refcounts != NULL)
2045 local_got_refcounts[-1]--;
2046 /* Fall through. */
2047
2048 case R_CRIS_8_PCREL:
2049 case R_CRIS_16_PCREL:
2050 case R_CRIS_32_PCREL:
2051 case R_CRIS_32_PLT_PCREL:
2052 if (h != NULL)
2053 {
2054 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2055 && h->plt.refcount > 0)
2056 --h->plt.refcount;
2057 }
2058 break;
2059
2060 default:
2061 break;
2062 }
2063 }
2064
2065 return TRUE;
2066 }
2067
2068 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2069 entry but we found we will not create any. Called when we find we will
2070 not have any PLT for this symbol, by for example
2071 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2072 or elf_cris_size_dynamic_sections if no dynamic sections will be
2073 created (we're only linking static objects). */
2074
2075 static bfd_boolean
2076 elf_cris_adjust_gotplt_to_got (h, p)
2077 struct elf_cris_link_hash_entry *h;
2078 PTR p;
2079 {
2080 struct bfd_link_info *info = (struct bfd_link_info *) p;
2081
2082 if (h->root.root.type == bfd_link_hash_warning)
2083 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
2084
2085 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2086 if (h->gotplt_refcount <= 0)
2087 return TRUE;
2088
2089 if (h->root.got.refcount > 0)
2090 {
2091 /* There's a GOT entry for this symbol. Just adjust the refcount.
2092 Probably not necessary at this stage, but keeping it accurate
2093 helps avoiding surprises later. */
2094 h->root.got.refcount += h->gotplt_refcount;
2095 h->gotplt_refcount = 0;
2096 }
2097 else
2098 {
2099 /* No GOT entry for this symbol. We need to create one. */
2100 bfd *dynobj = elf_hash_table (info)->dynobj;
2101 asection *sgot;
2102 asection *srelgot;
2103
2104 BFD_ASSERT (dynobj != NULL);
2105 sgot = bfd_get_section_by_name (dynobj, ".got");
2106 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2107
2108 /* Put an accurate refcount there. */
2109 h->root.got.refcount = h->gotplt_refcount;
2110
2111 h->gotplt_refcount = 0;
2112
2113 /* We always have a .got and a .rela.got section if there were
2114 GOTPLT relocs in input. */
2115 BFD_ASSERT (sgot != NULL && srelgot != NULL);
2116
2117 /* Allocate space in the .got section. */
2118 sgot->size += 4;
2119
2120 /* Allocate relocation space. */
2121 srelgot->size += sizeof (Elf32_External_Rela);
2122 }
2123
2124 return TRUE;
2125 }
2126
2127 /* Try to fold PLT entries with GOT entries. There are two cases when we
2128 want to do this:
2129
2130 - When all PLT references are GOTPLT references, and there are GOT
2131 references, and this is not the executable. We don't have to
2132 generate a PLT at all.
2133
2134 - When there are both (ordinary) PLT references and GOT references,
2135 and this isn't the executable.
2136 We want to make the PLT reference use the ordinary GOT entry rather
2137 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2138 since the GOT entry will have to be resolved at startup anyway.
2139
2140 Though the latter case is handled when room for the PLT is allocated,
2141 not here.
2142
2143 By folding into the GOT, we may need a round-trip to a PLT in the
2144 executable for calls, a loss in performance. Still, losing a
2145 reloc is a win in size and at least in start-up time.
2146
2147 Note that this function is called before symbols are forced local by
2148 version scripts. The differing cases are handled by
2149 elf_cris_hide_symbol. */
2150
2151 static bfd_boolean
2152 elf_cris_try_fold_plt_to_got (h, p)
2153 struct elf_cris_link_hash_entry *h;
2154 PTR p;
2155 {
2156 struct bfd_link_info *info = (struct bfd_link_info *) p;
2157
2158 /* If there are no GOT references for this symbol, we can't fold any
2159 other reference so there's nothing to do. Likewise if there are no
2160 PLT references; GOTPLT references included. */
2161 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2162 return TRUE;
2163
2164 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2165 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2166
2167 if (h->gotplt_refcount == h->root.plt.refcount)
2168 {
2169 /* The only PLT references are GOTPLT references, and there are GOT
2170 references. Convert PLT to GOT references. */
2171 if (! elf_cris_adjust_gotplt_to_got (h, info))
2172 return FALSE;
2173
2174 /* Clear the PLT references, so no PLT will be created. */
2175 h->root.plt.offset = (bfd_vma) -1;
2176 }
2177
2178 return TRUE;
2179 }
2180
2181 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2182 to use a GOT entry (and create one) rather than requiring a GOTPLT
2183 entry. */
2184
2185 static void
2186 elf_cris_hide_symbol (info, h, force_local)
2187 struct bfd_link_info *info;
2188 struct elf_link_hash_entry *h;
2189 bfd_boolean force_local;
2190 {
2191 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2192
2193 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2194 }
2195
2196 /* Adjust a symbol defined by a dynamic object and referenced by a
2197 regular object. The current definition is in some section of the
2198 dynamic object, but we're not including those sections. We have to
2199 change the definition to something the rest of the link can
2200 understand. */
2201
2202 static bfd_boolean
2203 elf_cris_adjust_dynamic_symbol (info, h)
2204 struct bfd_link_info *info;
2205 struct elf_link_hash_entry *h;
2206 {
2207 bfd *dynobj;
2208 asection *s;
2209 unsigned int power_of_two;
2210 bfd_size_type plt_entry_size;
2211
2212 dynobj = elf_hash_table (info)->dynobj;
2213
2214 /* Make sure we know what is going on here. */
2215 BFD_ASSERT (dynobj != NULL
2216 && (h->needs_plt
2217 || h->u.weakdef != NULL
2218 || (h->def_dynamic
2219 && h->ref_regular
2220 && !h->def_regular)));
2221
2222 plt_entry_size
2223 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2224 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2225
2226 /* If this is a function, put it in the procedure linkage table. We
2227 will fill in the contents of the procedure linkage table later,
2228 when we know the address of the .got section. */
2229 if (h->type == STT_FUNC
2230 || h->needs_plt)
2231 {
2232 /* If we link a program (not a DSO), we'll get rid of unnecessary
2233 PLT entries; we point to the actual symbols -- even for pic
2234 relocs, because a program built with -fpic should have the same
2235 result as one built without -fpic, specifically considering weak
2236 symbols.
2237 FIXME: m68k and i386 differ here, for unclear reasons. */
2238 if (! info->shared
2239 && !h->def_dynamic)
2240 {
2241 /* This case can occur if we saw a PLT reloc in an input file,
2242 but the symbol was not defined by a dynamic object. In such
2243 a case, we don't actually need to build a procedure linkage
2244 table, and we can just do an absolute or PC reloc instead, or
2245 change a .got.plt index to a .got index for GOTPLT relocs. */
2246 BFD_ASSERT (h->needs_plt);
2247 h->needs_plt = 0;
2248 h->plt.offset = (bfd_vma) -1;
2249 return
2250 elf_cris_adjust_gotplt_to_got ((struct
2251 elf_cris_link_hash_entry *) h,
2252 info);
2253 }
2254
2255 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2256 where a pointer-equivalent symbol was unimportant (i.e. more
2257 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2258 of the PLT. We can't for the executable, because the GOT
2259 entries will point to the PLT there (and be constant). */
2260 if (info->shared
2261 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2262 h, info))
2263 return FALSE;
2264
2265 /* GC or folding may have rendered this entry unused. */
2266 if (h->plt.refcount <= 0)
2267 {
2268 h->needs_plt = 0;
2269 h->plt.offset = (bfd_vma) -1;
2270 return TRUE;
2271 }
2272
2273 /* Make sure this symbol is output as a dynamic symbol. */
2274 if (h->dynindx == -1)
2275 {
2276 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2277 return FALSE;
2278 }
2279
2280 s = bfd_get_section_by_name (dynobj, ".plt");
2281 BFD_ASSERT (s != NULL);
2282
2283 /* If this is the first .plt entry, make room for the special
2284 first entry. */
2285 if (s->size == 0)
2286 s->size += plt_entry_size;
2287
2288 /* If this symbol is not defined in a regular file, and we are
2289 not generating a shared library, then set the symbol to this
2290 location in the .plt. */
2291 if (!info->shared
2292 && !h->def_regular)
2293 {
2294 h->root.u.def.section = s;
2295 h->root.u.def.value = s->size;
2296 }
2297
2298 /* If there's already a GOT entry, use that, not a .got.plt. A
2299 GOT field still has a reference count when we get here; it's
2300 not yet changed to an offset. We can't do this for an
2301 executable, because then the reloc associated with the PLT
2302 would get a non-PLT reloc pointing to the PLT. FIXME: Move
2303 this to elf_cris_try_fold_plt_to_got. */
2304 if (info->shared && h->got.refcount > 0)
2305 {
2306 h->got.refcount += h->plt.refcount;
2307
2308 /* Mark the PLT offset to use the GOT entry by setting the low
2309 bit in the plt offset; it is always a multiple of
2310 plt_entry_size (which is at least a multiple of 2). */
2311 BFD_ASSERT ((s->size % plt_entry_size) == 0);
2312
2313 /* Change the PLT refcount to an offset. */
2314 h->plt.offset = s->size;
2315
2316 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2317 that the got entry should be used instead. */
2318 BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2319 h)->gotplt_offset == 0);
2320
2321 /* Make room for this entry. */
2322 s->size += plt_entry_size;
2323
2324 return TRUE;
2325 }
2326
2327 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2328 h->plt.offset = s->size;
2329
2330 /* Make room for this entry. */
2331 s->size += plt_entry_size;
2332
2333 /* We also need to make an entry in the .got.plt section, which
2334 will be placed in the .got section by the linker script. */
2335 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2336 = elf_cris_hash_table (info)->next_gotplt_entry;
2337 elf_cris_hash_table (info)->next_gotplt_entry += 4;
2338
2339 s = bfd_get_section_by_name (dynobj, ".got.plt");
2340 BFD_ASSERT (s != NULL);
2341 s->size += 4;
2342
2343 /* We also need to make an entry in the .rela.plt section. */
2344
2345 s = bfd_get_section_by_name (dynobj, ".rela.plt");
2346 BFD_ASSERT (s != NULL);
2347 s->size += sizeof (Elf32_External_Rela);
2348
2349 return TRUE;
2350 }
2351
2352 /* Reinitialize the plt offset now that it is not used as a reference
2353 count any more. */
2354 h->plt.offset = (bfd_vma) -1;
2355
2356 /* If this is a weak symbol, and there is a real definition, the
2357 processor independent code will have arranged for us to see the
2358 real definition first, and we can just use the same value. */
2359 if (h->u.weakdef != NULL)
2360 {
2361 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2362 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2363 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2364 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2365 return TRUE;
2366 }
2367
2368 /* This is a reference to a symbol defined by a dynamic object which
2369 is not a function. */
2370
2371 /* If we are creating a shared library, we must presume that the
2372 only references to the symbol are via the global offset table.
2373 For such cases we need not do anything here; the relocations will
2374 be handled correctly by relocate_section. */
2375 if (info->shared)
2376 return TRUE;
2377
2378 /* If there are no references to this symbol that do not use the
2379 GOT, we don't need to generate a copy reloc. */
2380 if (!h->non_got_ref)
2381 return TRUE;
2382
2383 if (h->size == 0)
2384 {
2385 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
2386 h->root.root.string);
2387 return TRUE;
2388 }
2389
2390 /* We must allocate the symbol in our .dynbss section, which will
2391 become part of the .bss section of the executable. There will be
2392 an entry for this symbol in the .dynsym section. The dynamic
2393 object will contain position independent code, so all references
2394 from the dynamic object to this symbol will go through the global
2395 offset table. The dynamic linker will use the .dynsym entry to
2396 determine the address it must put in the global offset table, so
2397 both the dynamic object and the regular object will refer to the
2398 same memory location for the variable. */
2399
2400 s = bfd_get_section_by_name (dynobj, ".dynbss");
2401 BFD_ASSERT (s != NULL);
2402
2403 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2404 copy the initial value out of the dynamic object and into the
2405 runtime process image. We need to remember the offset into the
2406 .rela.bss section we are going to use. */
2407 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2408 {
2409 asection *srel;
2410
2411 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
2412 BFD_ASSERT (srel != NULL);
2413 srel->size += sizeof (Elf32_External_Rela);
2414 h->needs_copy = 1;
2415 }
2416
2417 /* Historic precedent: m68k and i386 allow max 8-byte alignment for the
2418 thing to copy; so do we. */
2419
2420 /* We need to figure out the alignment required for this symbol. I
2421 have no idea how ELF linkers handle this. */
2422 power_of_two = bfd_log2 (h->size);
2423 if (power_of_two > 3)
2424 power_of_two = 3;
2425
2426 /* Apply the required alignment. */
2427 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
2428 if (power_of_two > bfd_get_section_alignment (dynobj, s))
2429 {
2430 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
2431 return FALSE;
2432 }
2433
2434 /* Define the symbol as being at this point in the section. */
2435 h->root.u.def.section = s;
2436 h->root.u.def.value = s->size;
2437
2438 /* Increment the section size to make room for the symbol. */
2439 s->size += h->size;
2440
2441 return TRUE;
2442 }
2443
2444 /* Look through the relocs for a section during the first phase. */
2445
2446 static bfd_boolean
2447 cris_elf_check_relocs (abfd, info, sec, relocs)
2448 bfd *abfd;
2449 struct bfd_link_info *info;
2450 asection *sec;
2451 const Elf_Internal_Rela *relocs;
2452 {
2453 bfd *dynobj;
2454 Elf_Internal_Shdr *symtab_hdr;
2455 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
2456 bfd_signed_vma *local_got_refcounts;
2457 const Elf_Internal_Rela *rel;
2458 const Elf_Internal_Rela *rel_end;
2459 asection *sgot;
2460 asection *srelgot;
2461 asection *sreloc;
2462
2463 if (info->relocatable)
2464 return TRUE;
2465
2466 dynobj = elf_hash_table (info)->dynobj;
2467 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2468 sym_hashes = elf_sym_hashes (abfd);
2469 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
2470 local_got_refcounts = elf_local_got_refcounts (abfd);
2471
2472 sgot = NULL;
2473 srelgot = NULL;
2474 sreloc = NULL;
2475
2476 if (!elf_bad_symtab (abfd))
2477 sym_hashes_end -= symtab_hdr->sh_info;
2478
2479 rel_end = relocs + sec->reloc_count;
2480 for (rel = relocs; rel < rel_end; rel++)
2481 {
2482 struct elf_link_hash_entry *h;
2483 unsigned long r_symndx;
2484 enum elf_cris_reloc_type r_type;
2485
2486 r_symndx = ELF32_R_SYM (rel->r_info);
2487 if (r_symndx < symtab_hdr->sh_info)
2488 h = NULL;
2489 else
2490 {
2491 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2492 while (h->root.type == bfd_link_hash_indirect
2493 || h->root.type == bfd_link_hash_warning)
2494 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2495 }
2496
2497 r_type = ELF32_R_TYPE (rel->r_info);
2498
2499 /* Some relocs require linker-created sections; we need to hang them
2500 on the first input bfd we found that contained dynamic relocs. */
2501 switch (r_type)
2502 {
2503 case R_CRIS_16_GOT:
2504 case R_CRIS_32_GOT:
2505 case R_CRIS_32_GOTREL:
2506 case R_CRIS_32_PLT_GOTREL:
2507 case R_CRIS_32_PLT_PCREL:
2508 case R_CRIS_16_GOTPLT:
2509 case R_CRIS_32_GOTPLT:
2510 if (dynobj == NULL)
2511 {
2512 elf_hash_table (info)->dynobj = dynobj = abfd;
2513
2514 /* We could handle this if we can get a handle on the
2515 output bfd in elf_cris_adjust_dynamic_symbol. Failing
2516 that, we must insist on dynobj being a specific mach. */
2517 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
2518 {
2519 (*_bfd_error_handler)
2520 (_("%B, section %A:\n v10/v32 compatible object %s"
2521 " must not contain a PIC relocation"),
2522 abfd, sec);
2523 return FALSE;
2524 }
2525
2526 /* Create the .got section, so we can assume it's always
2527 present whenever there's a dynobj. */
2528 if (!_bfd_elf_create_got_section (dynobj, info))
2529 return FALSE;
2530 }
2531 break;
2532
2533 default:
2534 break;
2535 }
2536
2537 /* Some relocs require a global offset table (but perhaps not a
2538 specific GOT entry). */
2539 switch (r_type)
2540 {
2541 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
2542 entry only for local symbols. Unfortunately, we don't know
2543 until later on if there's a version script that forces the
2544 symbol local. We must have the .rela.got section in place
2545 before we know if the symbol looks global now, so we need
2546 to treat the reloc just like for R_CRIS_16_GOT and
2547 R_CRIS_32_GOT. */
2548 case R_CRIS_16_GOTPLT:
2549 case R_CRIS_32_GOTPLT:
2550 case R_CRIS_16_GOT:
2551 case R_CRIS_32_GOT:
2552 if (srelgot == NULL
2553 && (h != NULL || info->shared))
2554 {
2555 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2556 if (srelgot == NULL)
2557 {
2558 srelgot = bfd_make_section_with_flags (dynobj,
2559 ".rela.got",
2560 (SEC_ALLOC
2561 | SEC_LOAD
2562 | SEC_HAS_CONTENTS
2563 | SEC_IN_MEMORY
2564 | SEC_LINKER_CREATED
2565 | SEC_READONLY));
2566 if (srelgot == NULL
2567 || !bfd_set_section_alignment (dynobj, srelgot, 2))
2568 return FALSE;
2569 }
2570 }
2571 /* Fall through. */
2572
2573 case R_CRIS_32_GOTREL:
2574 case R_CRIS_32_PLT_GOTREL:
2575 if (sgot == NULL)
2576 sgot = bfd_get_section_by_name (dynobj, ".got");
2577
2578 if (local_got_refcounts == NULL)
2579 {
2580 bfd_size_type amt;
2581
2582 /* We use index local_got_refcounts[-1] to count all
2583 GOT-relative relocations that do not have explicit
2584 GOT entries. */
2585 amt = symtab_hdr->sh_info + 1;
2586 amt *= sizeof (bfd_signed_vma);
2587 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
2588 if (local_got_refcounts == NULL)
2589 return FALSE;
2590
2591 local_got_refcounts++;
2592 elf_local_got_refcounts (abfd) = local_got_refcounts;
2593 }
2594 break;
2595
2596 default:
2597 break;
2598 }
2599
2600 switch (r_type)
2601 {
2602 case R_CRIS_16_GOTPLT:
2603 case R_CRIS_32_GOTPLT:
2604 /* Mark that we need a GOT entry if the PLT entry (and its GOT
2605 entry) is eliminated. We can only do this for a non-local
2606 symbol. */
2607 if (h != NULL)
2608 {
2609 ((struct elf_cris_link_hash_entry *) h)->gotplt_refcount++;
2610 goto handle_gotplt_reloc;
2611 }
2612 /* If h is NULL then this is a local symbol, and we must make a
2613 GOT entry for it, so handle it like a GOT reloc. */
2614 /* Fall through. */
2615
2616 case R_CRIS_16_GOT:
2617 case R_CRIS_32_GOT:
2618 /* This symbol requires a global offset table entry. */
2619 if (h != NULL)
2620 {
2621 if (h->got.refcount == 0)
2622 {
2623 /* Make sure this symbol is output as a dynamic symbol. */
2624 if (h->dynindx == -1)
2625 {
2626 if (!bfd_elf_link_record_dynamic_symbol (info, h))
2627 return FALSE;
2628 }
2629
2630 /* Allocate space in the .got section. */
2631 sgot->size += 4;
2632 /* Allocate relocation space. */
2633 srelgot->size += sizeof (Elf32_External_Rela);
2634 }
2635 h->got.refcount++;
2636 }
2637 else
2638 {
2639 /* This is a global offset table entry for a local symbol. */
2640 if (local_got_refcounts[r_symndx] == 0)
2641 {
2642 sgot->size += 4;
2643 if (info->shared)
2644 {
2645 /* If we are generating a shared object, we need to
2646 output a R_CRIS_RELATIVE reloc so that the dynamic
2647 linker can adjust this GOT entry. */
2648 srelgot->size += sizeof (Elf32_External_Rela);
2649 }
2650 }
2651 local_got_refcounts[r_symndx]++;
2652 }
2653 break;
2654
2655 case R_CRIS_32_GOTREL:
2656 /* This reference requires a global offset table.
2657 FIXME: The actual refcount isn't used currently; the .got
2658 section can't be removed if there were any references in the
2659 input. */
2660 local_got_refcounts[-1]++;
2661 break;
2662
2663 handle_gotplt_reloc:
2664
2665 case R_CRIS_32_PLT_GOTREL:
2666 /* This reference requires a global offset table. */
2667 local_got_refcounts[-1]++;
2668 /* Fall through. */
2669
2670 case R_CRIS_32_PLT_PCREL:
2671 /* This symbol requires a procedure linkage table entry. We
2672 actually build the entry in adjust_dynamic_symbol,
2673 because this might be a case of linking PIC code which is
2674 never referenced by a dynamic object, in which case we
2675 don't need to generate a procedure linkage table entry
2676 after all. */
2677
2678 /* Beware: if we'd check for visibility of the symbol here
2679 (and not marking the need for a PLT when non-visible), we'd
2680 get into trouble with keeping handling consistent with
2681 regards to relocs found before definition and GOTPLT
2682 handling. Eliminable PLT entries will be dealt with later
2683 anyway. */
2684 if (h == NULL)
2685 continue;
2686
2687 h->needs_plt = 1;
2688 h->plt.refcount++;
2689 break;
2690
2691 case R_CRIS_8:
2692 case R_CRIS_16:
2693 case R_CRIS_32:
2694 /* Let's help debug shared library creation. Any of these
2695 relocs can be used in shared libs, but pages containing them
2696 cannot be shared. Don't warn for sections we don't care
2697 about, such as debug sections or non-constant sections. We
2698 can't help tables of (global) function pointers, for example,
2699 though they must be emitted in a data section to avoid having
2700 impure text sections. */
2701 if (info->shared
2702 && (sec->flags & SEC_ALLOC) != 0
2703 && (sec->flags & SEC_READONLY) != 0)
2704 {
2705 /* FIXME: How do we make this optionally a warning only? */
2706 (*_bfd_error_handler)
2707 (_("%B, section %A:\n relocation %s should not"
2708 " be used in a shared object; recompile with -fPIC"),
2709 abfd,
2710 sec,
2711 cris_elf_howto_table[r_type].name);
2712 }
2713 /* Fall through. */
2714
2715 case R_CRIS_8_PCREL:
2716 case R_CRIS_16_PCREL:
2717 case R_CRIS_32_PCREL:
2718 if (h != NULL)
2719 {
2720 h->non_got_ref = 1;
2721
2722 /* Make sure a plt entry is created for this symbol if it
2723 turns out to be a function defined by a dynamic object. */
2724 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2725 h->plt.refcount++;
2726 }
2727
2728 /* If we are creating a shared library and this is not a local
2729 symbol, we need to copy the reloc into the shared library.
2730 However when linking with -Bsymbolic and this is a global
2731 symbol which is defined in an object we are including in the
2732 link (i.e., DEF_REGULAR is set), then we can resolve the
2733 reloc directly. At this point we have not seen all the input
2734 files, so it is possible that DEF_REGULAR is not set now but
2735 will be set later (it is never cleared). In case of a weak
2736 definition, DEF_REGULAR may be cleared later by a strong
2737 definition in a shared library. We account for that
2738 possibility below by storing information in the relocs_copied
2739 field of the hash table entry. A similar situation occurs
2740 when creating shared libraries and symbol visibility changes
2741 render the symbol local. */
2742
2743 /* No need to do anything if we're not creating a shared object. */
2744 if (! info->shared)
2745 break;
2746
2747 /* We don't need to handle relocs into sections not going into
2748 the "real" output. */
2749 if ((sec->flags & SEC_ALLOC) == 0)
2750 break;
2751
2752 /* We can only eliminate PC-relative relocs. */
2753 if (r_type == R_CRIS_8_PCREL
2754 || r_type == R_CRIS_16_PCREL
2755 || r_type == R_CRIS_32_PCREL)
2756 {
2757 /* If the symbol is local, then we can eliminate the reloc. */
2758 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2759 break;
2760
2761 /* If this is with -Bsymbolic and the symbol isn't weak, and
2762 is defined by an ordinary object (the ones we include in
2763 this shared library) then we can also eliminate the
2764 reloc. See comment above for more eliminable cases which
2765 we can't identify at this time. */
2766 if (info->symbolic
2767 && h->root.type != bfd_link_hash_defweak
2768 && h->def_regular)
2769 break;
2770
2771 if ((sec->flags & SEC_READONLY) != 0)
2772 {
2773 /* FIXME: How do we make this optionally a warning only? */
2774 (*_bfd_error_handler)
2775 (_("%B, section %A:\n relocation %s should not be used"
2776 " in a shared object; recompile with -fPIC"),
2777 abfd,
2778 sec,
2779 cris_elf_howto_table[r_type].name);
2780 }
2781 }
2782
2783 /* We create a reloc section in dynobj and make room for this
2784 reloc. */
2785 if (sreloc == NULL)
2786 {
2787 const char *name;
2788
2789 name = (bfd_elf_string_from_elf_section
2790 (abfd,
2791 elf_elfheader (abfd)->e_shstrndx,
2792 elf_section_data (sec)->rel_hdr.sh_name));
2793 if (name == NULL)
2794 return FALSE;
2795
2796 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
2797 && strcmp (bfd_get_section_name (abfd, sec),
2798 name + 5) == 0);
2799
2800 sreloc = bfd_get_section_by_name (dynobj, name);
2801 if (sreloc == NULL)
2802 {
2803 sreloc = bfd_make_section_with_flags (dynobj, name,
2804 (SEC_ALLOC
2805 | SEC_LOAD
2806 | SEC_HAS_CONTENTS
2807 | SEC_IN_MEMORY
2808 | SEC_LINKER_CREATED
2809 | SEC_READONLY));
2810 if (sreloc == NULL
2811 || !bfd_set_section_alignment (dynobj, sreloc, 2))
2812 return FALSE;
2813 }
2814 if (sec->flags & SEC_READONLY)
2815 info->flags |= DF_TEXTREL;
2816 }
2817
2818 sreloc->size += sizeof (Elf32_External_Rela);
2819
2820 /* If we are linking with -Bsymbolic, we count the number of PC
2821 relative relocations we have entered for this symbol, so that
2822 we can discard them again if the symbol is later defined by a
2823 regular object. We know that h is really a pointer to an
2824 elf_cris_link_hash_entry. */
2825 if ((r_type == R_CRIS_8_PCREL
2826 || r_type == R_CRIS_16_PCREL
2827 || r_type == R_CRIS_32_PCREL)
2828 && info->symbolic)
2829 {
2830 struct elf_cris_link_hash_entry *eh;
2831 struct elf_cris_pcrel_relocs_copied *p;
2832
2833 eh = (struct elf_cris_link_hash_entry *) h;
2834
2835 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2836 if (p->section == sreloc)
2837 break;
2838
2839 if (p == NULL)
2840 {
2841 p = ((struct elf_cris_pcrel_relocs_copied *)
2842 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
2843 if (p == NULL)
2844 return FALSE;
2845 p->next = eh->pcrel_relocs_copied;
2846 eh->pcrel_relocs_copied = p;
2847 p->section = sreloc;
2848 p->count = 0;
2849 }
2850
2851 ++p->count;
2852 }
2853 break;
2854
2855 /* This relocation describes the C++ object vtable hierarchy.
2856 Reconstruct it for later use during GC. */
2857 case R_CRIS_GNU_VTINHERIT:
2858 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2859 return FALSE;
2860 break;
2861
2862 /* This relocation describes which C++ vtable entries are actually
2863 used. Record for later use during GC. */
2864 case R_CRIS_GNU_VTENTRY:
2865 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2866 return FALSE;
2867 break;
2868
2869 default:
2870 /* Other relocs do not appear here. */
2871 bfd_set_error (bfd_error_bad_value);
2872 return FALSE;
2873 }
2874 }
2875
2876 return TRUE;
2877 }
2878
2879 /* Set the sizes of the dynamic sections. */
2880
2881 static bfd_boolean
2882 elf_cris_size_dynamic_sections (output_bfd, info)
2883 bfd *output_bfd ATTRIBUTE_UNUSED;
2884 struct bfd_link_info *info;
2885 {
2886 bfd *dynobj;
2887 asection *s;
2888 bfd_boolean plt;
2889 bfd_boolean relocs;
2890
2891 dynobj = elf_hash_table (info)->dynobj;
2892 BFD_ASSERT (dynobj != NULL);
2893
2894 if (elf_hash_table (info)->dynamic_sections_created)
2895 {
2896 /* Set the contents of the .interp section to the interpreter. */
2897 if (info->executable)
2898 {
2899 s = bfd_get_section_by_name (dynobj, ".interp");
2900 BFD_ASSERT (s != NULL);
2901 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2902 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2903 }
2904 }
2905 else
2906 {
2907 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
2908 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2909 elf_cris_adjust_gotplt_to_got,
2910 (PTR) info);
2911
2912 /* We may have created entries in the .rela.got section.
2913 However, if we are not creating the dynamic sections, we will
2914 not actually use these entries. Reset the size of .rela.got,
2915 which will cause it to get stripped from the output file
2916 below. */
2917 s = bfd_get_section_by_name (dynobj, ".rela.got");
2918 if (s != NULL)
2919 s->size = 0;
2920 }
2921
2922 /* If this is a -Bsymbolic shared link, then we need to discard all PC
2923 relative relocs against symbols defined in a regular object. We
2924 allocated space for them in the check_relocs routine, but we will not
2925 fill them in in the relocate_section routine. We also discard space
2926 for relocs that have become for local symbols due to symbol
2927 visibility changes. For programs, we discard space for relocs for
2928 symbols not referenced by any dynamic object. */
2929 if (info->shared)
2930 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2931 elf_cris_discard_excess_dso_dynamics,
2932 (PTR) info);
2933 else
2934 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2935 elf_cris_discard_excess_program_dynamics,
2936 (PTR) info);
2937
2938 /* The check_relocs and adjust_dynamic_symbol entry points have
2939 determined the sizes of the various dynamic sections. Allocate
2940 memory for them. */
2941 plt = FALSE;
2942 relocs = FALSE;
2943 for (s = dynobj->sections; s != NULL; s = s->next)
2944 {
2945 const char *name;
2946
2947 if ((s->flags & SEC_LINKER_CREATED) == 0)
2948 continue;
2949
2950 /* It's OK to base decisions on the section name, because none
2951 of the dynobj section names depend upon the input files. */
2952 name = bfd_get_section_name (dynobj, s);
2953
2954 if (strcmp (name, ".plt") == 0)
2955 {
2956 /* Remember whether there is a PLT. */
2957 plt = s->size != 0;
2958 }
2959 else if (CONST_STRNEQ (name, ".rela"))
2960 {
2961 if (s->size != 0)
2962 {
2963 /* Remember whether there are any reloc sections other
2964 than .rela.plt. */
2965 if (strcmp (name, ".rela.plt") != 0)
2966 relocs = TRUE;
2967
2968 /* We use the reloc_count field as a counter if we need
2969 to copy relocs into the output file. */
2970 s->reloc_count = 0;
2971 }
2972 }
2973 else if (! CONST_STRNEQ (name, ".got")
2974 && strcmp (name, ".dynbss") != 0)
2975 {
2976 /* It's not one of our sections, so don't allocate space. */
2977 continue;
2978 }
2979
2980 if (s->size == 0)
2981 {
2982 /* If we don't need this section, strip it from the
2983 output file. This is mostly to handle .rela.bss and
2984 .rela.plt. We must create both sections in
2985 create_dynamic_sections, because they must be created
2986 before the linker maps input sections to output
2987 sections. The linker does that before
2988 adjust_dynamic_symbol is called, and it is that
2989 function which decides whether anything needs to go
2990 into these sections. */
2991 s->flags |= SEC_EXCLUDE;
2992 continue;
2993 }
2994
2995 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2996 continue;
2997
2998 /* Allocate memory for the section contents. We use bfd_zalloc here
2999 in case unused entries are not reclaimed before the section's
3000 contents are written out. This should not happen, but this way
3001 if it does, we will not write out garbage. For reloc sections,
3002 this will make entries have the type R_CRIS_NONE. */
3003 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3004 if (s->contents == NULL)
3005 return FALSE;
3006 }
3007
3008 if (elf_hash_table (info)->dynamic_sections_created)
3009 {
3010 /* Add some entries to the .dynamic section. We fill in the
3011 values later, in elf_cris_finish_dynamic_sections, but we
3012 must add the entries now so that we get the correct size for
3013 the .dynamic section. The DT_DEBUG entry is filled in by the
3014 dynamic linker and used by the debugger. */
3015 #define add_dynamic_entry(TAG, VAL) \
3016 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3017
3018 if (!info->shared)
3019 {
3020 if (!add_dynamic_entry (DT_DEBUG, 0))
3021 return FALSE;
3022 }
3023
3024 if (plt)
3025 {
3026 if (!add_dynamic_entry (DT_PLTGOT, 0)
3027 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3028 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3029 || !add_dynamic_entry (DT_JMPREL, 0))
3030 return FALSE;
3031 }
3032
3033 if (relocs)
3034 {
3035 if (!add_dynamic_entry (DT_RELA, 0)
3036 || !add_dynamic_entry (DT_RELASZ, 0)
3037 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3038 return FALSE;
3039 }
3040
3041 if ((info->flags & DF_TEXTREL) != 0)
3042 {
3043 if (!add_dynamic_entry (DT_TEXTREL, 0))
3044 return FALSE;
3045 info->flags |= DF_TEXTREL;
3046 }
3047 }
3048 #undef add_dynamic_entry
3049
3050 return TRUE;
3051 }
3052
3053 /* This function is called via elf_cris_link_hash_traverse if we are
3054 creating a shared object. In the -Bsymbolic case, it discards the
3055 space allocated to copy PC relative relocs against symbols which
3056 are defined in regular objects. For the normal non-symbolic case,
3057 we also discard space for relocs that have become local due to
3058 symbol visibility changes. We allocated space for them in the
3059 check_relocs routine, but we won't fill them in in the
3060 relocate_section routine. */
3061
3062 static bfd_boolean
3063 elf_cris_discard_excess_dso_dynamics (h, inf)
3064 struct elf_cris_link_hash_entry *h;
3065 PTR inf;
3066 {
3067 struct elf_cris_pcrel_relocs_copied *s;
3068 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3069
3070 if (h->root.root.type == bfd_link_hash_warning)
3071 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3072
3073 /* If a symbol has been forced local or we have found a regular
3074 definition for the symbolic link case, then we won't be needing
3075 any relocs. */
3076 if (h->root.def_regular
3077 && (h->root.forced_local
3078 || info->symbolic))
3079 {
3080 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3081 s->section->size -= s->count * sizeof (Elf32_External_Rela);
3082 }
3083
3084 return TRUE;
3085 }
3086
3087 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3088 creating a shared object. We discard space for relocs for symbols put
3089 in the .got, but which we found we do not have to resolve at run-time. */
3090
3091 static bfd_boolean
3092 elf_cris_discard_excess_program_dynamics (h, inf)
3093 struct elf_cris_link_hash_entry *h;
3094 PTR inf;
3095 {
3096 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3097
3098 if (h->root.root.type == bfd_link_hash_warning)
3099 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3100
3101 /* If we're not creating a shared library and have a symbol which is
3102 referred to by .got references, but the symbol is defined locally,
3103 (or rather, not defined by a DSO) then lose the reloc for the .got
3104 (don't allocate room for it). Likewise for relocs for something
3105 for which we create a PLT. */
3106 if (!h->root.def_dynamic
3107 || h->root.plt.refcount > 0)
3108 {
3109 if (h->root.got.refcount > 0
3110 /* The size of this section is only valid and in sync with the
3111 various reference counts if we do dynamic; don't decrement it
3112 otherwise. */
3113 && elf_hash_table (info)->dynamic_sections_created)
3114 {
3115 bfd *dynobj = elf_hash_table (info)->dynobj;
3116 asection *srelgot;
3117
3118 BFD_ASSERT (dynobj != NULL);
3119
3120 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3121
3122 BFD_ASSERT (srelgot != NULL);
3123
3124 srelgot->size -= sizeof (Elf32_External_Rela);
3125 }
3126
3127 /* If the locally-defined symbol isn't used by a DSO, then we don't
3128 have to export it as a dynamic symbol. This was already done for
3129 functions; doing this for all symbols would presumably not
3130 introduce new problems. Of course we don't do this if we're
3131 exporting all dynamic symbols. */
3132 if (! info->export_dynamic
3133 && h->root.dynindx != -1
3134 && !h->root.def_dynamic
3135 && !h->root.ref_dynamic)
3136 {
3137 h->root.dynindx = -1;
3138 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3139 h->root.dynstr_index);
3140 }
3141 }
3142
3143 return TRUE;
3144 }
3145
3146 /* Reject a file depending on presence and expectation of prefixed
3147 underscores on symbols. */
3148
3149 static bfd_boolean
3150 cris_elf_object_p (abfd)
3151 bfd *abfd;
3152 {
3153 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
3154 return FALSE;
3155
3156 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
3157 return (bfd_get_symbol_leading_char (abfd) == '_');
3158 else
3159 return (bfd_get_symbol_leading_char (abfd) == 0);
3160 }
3161
3162 /* Mark presence or absence of leading underscore. Set machine type
3163 flags from mach type. */
3164
3165 static void
3166 cris_elf_final_write_processing (abfd, linker)
3167 bfd *abfd;
3168 bfd_boolean linker ATTRIBUTE_UNUSED;
3169 {
3170 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
3171
3172 e_flags &= ~EF_CRIS_UNDERSCORE;
3173 if (bfd_get_symbol_leading_char (abfd) == '_')
3174 e_flags |= EF_CRIS_UNDERSCORE;
3175
3176 switch (bfd_get_mach (abfd))
3177 {
3178 case bfd_mach_cris_v0_v10:
3179 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
3180 break;
3181
3182 case bfd_mach_cris_v10_v32:
3183 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
3184 break;
3185
3186 case bfd_mach_cris_v32:
3187 e_flags |= EF_CRIS_VARIANT_V32;
3188 break;
3189
3190 default:
3191 _bfd_abort (__FILE__, __LINE__,
3192 _("Unexpected machine number"));
3193 }
3194
3195 elf_elfheader (abfd)->e_flags = e_flags;
3196 }
3197
3198 /* Set the mach type from e_flags value. */
3199
3200 static bfd_boolean
3201 cris_elf_set_mach_from_flags (abfd, flags)
3202 bfd *abfd;
3203 unsigned long flags;
3204 {
3205 switch (flags & EF_CRIS_VARIANT_MASK)
3206 {
3207 case EF_CRIS_VARIANT_ANY_V0_V10:
3208 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
3209 break;
3210
3211 case EF_CRIS_VARIANT_V32:
3212 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
3213 break;
3214
3215 case EF_CRIS_VARIANT_COMMON_V10_V32:
3216 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
3217 break;
3218
3219 default:
3220 /* Since we don't recognize them, we obviously can't support them
3221 with this code; we'd have to require that all future handling
3222 would be optional. */
3223 bfd_set_error (bfd_error_wrong_format);
3224 return FALSE;
3225 }
3226
3227 return TRUE;
3228 }
3229
3230 /* Display the flags field. */
3231
3232 static bfd_boolean
3233 cris_elf_print_private_bfd_data (abfd, ptr)
3234 bfd *abfd;
3235 PTR ptr;
3236 {
3237 FILE *file = (FILE *) ptr;
3238
3239 BFD_ASSERT (abfd != NULL && ptr != NULL);
3240
3241 _bfd_elf_print_private_bfd_data (abfd, ptr);
3242
3243 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3244
3245 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
3246 fprintf (file, _(" [symbols have a _ prefix]"));
3247 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3248 == EF_CRIS_VARIANT_COMMON_V10_V32)
3249 fprintf (file, _(" [v10 and v32]"));
3250 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3251 == EF_CRIS_VARIANT_V32)
3252 fprintf (file, _(" [v32]"));
3253
3254 fputc ('\n', file);
3255 return TRUE;
3256 }
3257
3258 /* Don't mix files with and without a leading underscore. */
3259
3260 static bfd_boolean
3261 cris_elf_merge_private_bfd_data (ibfd, obfd)
3262 bfd *ibfd;
3263 bfd *obfd;
3264 {
3265 int imach, omach;
3266
3267 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3268 return FALSE;
3269
3270 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3271 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3272 return TRUE;
3273
3274 imach = bfd_get_mach (ibfd);
3275
3276 if (! elf_flags_init (obfd))
3277 {
3278 /* This happens when ld starts out with a 'blank' output file. */
3279 elf_flags_init (obfd) = TRUE;
3280
3281 /* We ignore the linker-set mach, and instead set it according to
3282 the first input file. This would also happen if we could
3283 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
3284 This allows us to keep the same linker config across
3285 cris(v0..v10) and crisv32. The drawback is that we can't force
3286 the output type, which might be a sane thing to do for a
3287 v10+v32 compatibility object. */
3288 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3289 return FALSE;
3290 }
3291
3292 if (bfd_get_symbol_leading_char (ibfd)
3293 != bfd_get_symbol_leading_char (obfd))
3294 {
3295 (*_bfd_error_handler)
3296 (bfd_get_symbol_leading_char (ibfd) == '_'
3297 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
3298 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
3299 ibfd);
3300 bfd_set_error (bfd_error_bad_value);
3301 return FALSE;
3302 }
3303
3304 omach = bfd_get_mach (obfd);
3305
3306 if (imach != omach)
3307 {
3308 /* We can get an incompatible combination only if either is
3309 bfd_mach_cris_v32, and the other one isn't compatible. */
3310 if ((imach == bfd_mach_cris_v32
3311 && omach != bfd_mach_cris_v10_v32)
3312 || (omach == bfd_mach_cris_v32
3313 && imach != bfd_mach_cris_v10_v32))
3314 {
3315 (*_bfd_error_handler)
3316 ((imach == bfd_mach_cris_v32)
3317 ? _("%B contains CRIS v32 code, incompatible"
3318 " with previous objects")
3319 : _("%B contains non-CRIS-v32 code, incompatible"
3320 " with previous objects"),
3321 ibfd);
3322 bfd_set_error (bfd_error_bad_value);
3323 return FALSE;
3324 }
3325
3326 /* We don't have to check the case where the input is compatible
3327 with v10 and v32, because the output is already known to be set
3328 to the other (compatible) mach. */
3329 if (omach == bfd_mach_cris_v10_v32
3330 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3331 return FALSE;
3332 }
3333
3334 return TRUE;
3335 }
3336
3337 /* Do side-effects of e_flags copying to obfd. */
3338
3339 static bfd_boolean
3340 cris_elf_copy_private_bfd_data (ibfd, obfd)
3341 bfd *ibfd;
3342 bfd *obfd;
3343 {
3344 /* Call the base function. */
3345 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
3346 return FALSE;
3347
3348 /* If output is big-endian for some obscure reason, stop here. */
3349 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
3350 return FALSE;
3351
3352 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3353 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3354 return TRUE;
3355
3356 /* Do what we really came here for. */
3357 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
3358 }
3359
3360 static enum elf_reloc_type_class
3361 elf_cris_reloc_type_class (rela)
3362 const Elf_Internal_Rela *rela;
3363 {
3364 switch ((int) ELF32_R_TYPE (rela->r_info))
3365 {
3366 case R_CRIS_RELATIVE:
3367 return reloc_class_relative;
3368 case R_CRIS_JUMP_SLOT:
3369 return reloc_class_plt;
3370 case R_CRIS_COPY:
3371 return reloc_class_copy;
3372 default:
3373 return reloc_class_normal;
3374 }
3375 }
3376 \f
3377 #define ELF_ARCH bfd_arch_cris
3378 #define ELF_MACHINE_CODE EM_CRIS
3379 #define ELF_MAXPAGESIZE 0x2000
3380
3381 #define TARGET_LITTLE_SYM bfd_elf32_cris_vec
3382 #define TARGET_LITTLE_NAME "elf32-cris"
3383 #define elf_symbol_leading_char 0
3384
3385 #define elf_info_to_howto_rel NULL
3386 #define elf_info_to_howto cris_info_to_howto_rela
3387 #define elf_backend_relocate_section cris_elf_relocate_section
3388 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
3389 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook
3390 #define elf_backend_check_relocs cris_elf_check_relocs
3391 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
3392 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
3393
3394 #define elf_backend_can_gc_sections 1
3395 #define elf_backend_can_refcount 1
3396
3397 #define elf_backend_object_p cris_elf_object_p
3398 #define elf_backend_final_write_processing \
3399 cris_elf_final_write_processing
3400 #define bfd_elf32_bfd_print_private_bfd_data \
3401 cris_elf_print_private_bfd_data
3402 #define bfd_elf32_bfd_merge_private_bfd_data \
3403 cris_elf_merge_private_bfd_data
3404 #define bfd_elf32_bfd_copy_private_bfd_data \
3405 cris_elf_copy_private_bfd_data
3406
3407 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
3408
3409 #define bfd_elf32_bfd_link_hash_table_create \
3410 elf_cris_link_hash_table_create
3411 #define elf_backend_adjust_dynamic_symbol \
3412 elf_cris_adjust_dynamic_symbol
3413 #define elf_backend_size_dynamic_sections \
3414 elf_cris_size_dynamic_sections
3415 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3416 #define elf_backend_finish_dynamic_symbol \
3417 elf_cris_finish_dynamic_symbol
3418 #define elf_backend_finish_dynamic_sections \
3419 elf_cris_finish_dynamic_sections
3420 #define elf_backend_create_dynamic_sections \
3421 _bfd_elf_create_dynamic_sections
3422 #define bfd_elf32_bfd_final_link \
3423 bfd_elf_gc_common_final_link
3424 #define elf_backend_hide_symbol elf_cris_hide_symbol
3425 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
3426
3427 #define elf_backend_want_got_plt 1
3428 #define elf_backend_plt_readonly 1
3429 #define elf_backend_want_plt_sym 0
3430 #define elf_backend_got_header_size 12
3431
3432 /* Later, we my want to optimize RELA entries into REL entries for dynamic
3433 linking and libraries (if it's a win of any significance). Until then,
3434 take the easy route. */
3435 #define elf_backend_may_use_rel_p 0
3436 #define elf_backend_may_use_rela_p 1
3437 #define elf_backend_rela_normal 1
3438
3439 #include "elf32-target.h"
3440
3441 #undef TARGET_LITTLE_SYM
3442 #undef TARGET_LITTLE_NAME
3443 #undef elf_symbol_leading_char
3444
3445 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
3446 #define TARGET_LITTLE_NAME "elf32-us-cris"
3447 #define elf_symbol_leading_char '_'
3448 #undef elf32_bed
3449 #define elf32_bed elf32_us_cris_bed
3450
3451 #include "elf32-target.h"
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