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2005-10-28 Paul Brook <paul@codesourcery.com>
[binutils.git] / bfd / elf32-cris.c
blob06865dcc2e2251d417294b29aa5d7643b9159a49
1 /* CRIS-specific support for 32-bit ELF.
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005
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_gc_sweep_hook
55 PARAMS ((bfd *, struct bfd_link_info *, asection *,
56 const Elf_Internal_Rela *));
57
58 static asection * cris_elf_gc_mark_hook
59 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
60 struct elf_link_hash_entry *, Elf_Internal_Sym *));
61
62 static bfd_boolean cris_elf_object_p PARAMS ((bfd *));
63
64 static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean));
65
66 static bfd_boolean cris_elf_set_mach_from_flags
67 PARAMS ((bfd *, unsigned long int));
68
69 static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
70
71 static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
72 static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
73
74 struct elf_cris_link_hash_entry;
75 static bfd_boolean elf_cris_discard_excess_dso_dynamics
76 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
77 static bfd_boolean elf_cris_discard_excess_program_dynamics
78 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
79 static bfd_boolean elf_cris_adjust_gotplt_to_got
80 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
81 static bfd_boolean elf_cris_try_fold_plt_to_got
82 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
83 static struct bfd_hash_entry *elf_cris_link_hash_newfunc
84 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
85 static struct bfd_link_hash_table *elf_cris_link_hash_table_create
86 PARAMS ((bfd *));
87 static bfd_boolean elf_cris_adjust_dynamic_symbol
88 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
89 static bfd_boolean cris_elf_check_relocs
90 PARAMS ((bfd *, struct bfd_link_info *, asection *,
91 const Elf_Internal_Rela *));
92
93 static bfd_boolean elf_cris_size_dynamic_sections
94 PARAMS ((bfd *, struct bfd_link_info *));
95 static bfd_boolean elf_cris_finish_dynamic_symbol
96 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
97 Elf_Internal_Sym *));
98 static bfd_boolean elf_cris_finish_dynamic_sections
99 PARAMS ((bfd *, struct bfd_link_info *));
100 static void elf_cris_hide_symbol
101 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
102 static enum elf_reloc_type_class elf_cris_reloc_type_class
103 PARAMS ((const Elf_Internal_Rela *));
104
105 static reloc_howto_type cris_elf_howto_table [] =
106 {
107 /* This reloc does nothing. */
108 HOWTO (R_CRIS_NONE, /* type */
109 0, /* rightshift */
110 2, /* size (0 = byte, 1 = short, 2 = long) */
111 32, /* bitsize */
112 FALSE, /* pc_relative */
113 0, /* bitpos */
114 complain_overflow_bitfield, /* complain_on_overflow */
115 bfd_elf_generic_reloc, /* special_function */
116 "R_CRIS_NONE", /* name */
117 FALSE, /* partial_inplace */
118 0, /* src_mask */
119 0, /* dst_mask */
120 FALSE), /* pcrel_offset */
121
122 /* An 8 bit absolute relocation. */
123 HOWTO (R_CRIS_8, /* type */
124 0, /* rightshift */
125 0, /* size (0 = byte, 1 = short, 2 = long) */
126 8, /* bitsize */
127 FALSE, /* pc_relative */
128 0, /* bitpos */
129 complain_overflow_bitfield, /* complain_on_overflow */
130 bfd_elf_generic_reloc, /* special_function */
131 "R_CRIS_8", /* name */
132 FALSE, /* partial_inplace */
133 0x0000, /* src_mask */
134 0x00ff, /* dst_mask */
135 FALSE), /* pcrel_offset */
136
137 /* A 16 bit absolute relocation. */
138 HOWTO (R_CRIS_16, /* type */
139 0, /* rightshift */
140 1, /* size (0 = byte, 1 = short, 2 = long) */
141 16, /* bitsize */
142 FALSE, /* pc_relative */
143 0, /* bitpos */
144 complain_overflow_bitfield, /* complain_on_overflow */
145 bfd_elf_generic_reloc, /* special_function */
146 "R_CRIS_16", /* name */
147 FALSE, /* partial_inplace */
148 0x00000000, /* src_mask */
149 0x0000ffff, /* dst_mask */
150 FALSE), /* pcrel_offset */
151
152 /* A 32 bit absolute relocation. */
153 HOWTO (R_CRIS_32, /* type */
154 0, /* rightshift */
155 2, /* size (0 = byte, 1 = short, 2 = long) */
156 32, /* bitsize */
157 FALSE, /* pc_relative */
158 0, /* bitpos */
159 /* We don't want overflow complaints for 64-bit vma builds
160 for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
161 32-bit ELF) where sym=0xc0001234.
162 Don't do this for the PIC relocs, as we don't expect to
163 see them with large offsets. */
164 complain_overflow_dont, /* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_CRIS_32", /* name */
167 FALSE, /* partial_inplace */
168 0x00000000, /* src_mask */
169 0xffffffff, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 /* An 8 bit PC-relative relocation. */
173 HOWTO (R_CRIS_8_PCREL, /* type */
174 0, /* rightshift */
175 0, /* size (0 = byte, 1 = short, 2 = long) */
176 8, /* bitsize */
177 TRUE, /* pc_relative */
178 0, /* bitpos */
179 complain_overflow_bitfield, /* complain_on_overflow */
180 cris_elf_pcrel_reloc, /* special_function */
181 "R_CRIS_8_PCREL", /* name */
182 FALSE, /* partial_inplace */
183 0x0000, /* src_mask */
184 0x00ff, /* dst_mask */
185 TRUE), /* pcrel_offset */
186
187 /* A 16 bit PC-relative relocation. */
188 HOWTO (R_CRIS_16_PCREL, /* type */
189 0, /* rightshift */
190 1, /* size (0 = byte, 1 = short, 2 = long) */
191 16, /* bitsize */
192 TRUE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_bitfield, /* complain_on_overflow */
195 cris_elf_pcrel_reloc, /* special_function */
196 "R_CRIS_16_PCREL", /* name */
197 FALSE, /* partial_inplace */
198 0x00000000, /* src_mask */
199 0x0000ffff, /* dst_mask */
200 TRUE), /* pcrel_offset */
201
202 /* A 32 bit PC-relative relocation. */
203 HOWTO (R_CRIS_32_PCREL, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 TRUE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_bitfield, /* complain_on_overflow */
210 cris_elf_pcrel_reloc, /* special_function */
211 "R_CRIS_32_PCREL", /* name */
212 FALSE, /* partial_inplace */
213 0x00000000, /* src_mask */
214 0xffffffff, /* dst_mask */
215 TRUE), /* pcrel_offset */
216
217 /* GNU extension to record C++ vtable hierarchy. */
218 HOWTO (R_CRIS_GNU_VTINHERIT, /* type */
219 0, /* rightshift */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
221 0, /* bitsize */
222 FALSE, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_dont, /* complain_on_overflow */
225 NULL, /* special_function */
226 "R_CRIS_GNU_VTINHERIT", /* name */
227 FALSE, /* partial_inplace */
228 0, /* src_mask */
229 0, /* dst_mask */
230 FALSE), /* pcrel_offset */
231
232 /* GNU extension to record C++ vtable member usage. */
233 HOWTO (R_CRIS_GNU_VTENTRY, /* type */
234 0, /* rightshift */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
236 0, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_dont, /* complain_on_overflow */
240 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
241 "R_CRIS_GNU_VTENTRY", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 /* This is used only by the dynamic linker. The symbol should exist
248 both in the object being run and in some shared library. The
249 dynamic linker copies the data addressed by the symbol from the
250 shared library into the object, because the object being
251 run has to have the data at some particular address. */
252 HOWTO (R_CRIS_COPY, /* type */
253 0, /* rightshift */
254 2, /* size (0 = byte, 1 = short, 2 = long) */
255 32, /* bitsize */
256 FALSE, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_bitfield, /* complain_on_overflow */
259 bfd_elf_generic_reloc, /* special_function */
260 "R_CRIS_COPY", /* name */
261 FALSE, /* partial_inplace */
262 0, /* src_mask */
263 0, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 /* Like R_CRIS_32, but used when setting global offset table entries. */
267 HOWTO (R_CRIS_GLOB_DAT, /* type */
268 0, /* rightshift */
269 2, /* size (0 = byte, 1 = short, 2 = long) */
270 32, /* bitsize */
271 FALSE, /* pc_relative */
272 0, /* bitpos */
273 complain_overflow_bitfield, /* complain_on_overflow */
274 bfd_elf_generic_reloc, /* special_function */
275 "R_CRIS_GLOB_DAT", /* name */
276 FALSE, /* partial_inplace */
277 0, /* src_mask */
278 0xffffffff, /* dst_mask */
279 FALSE), /* pcrel_offset */
280
281 /* Marks a procedure linkage table entry for a symbol. */
282 HOWTO (R_CRIS_JUMP_SLOT, /* type */
283 0, /* rightshift */
284 2, /* size (0 = byte, 1 = short, 2 = long) */
285 32, /* bitsize */
286 FALSE, /* pc_relative */
287 0, /* bitpos */
288 complain_overflow_bitfield, /* complain_on_overflow */
289 bfd_elf_generic_reloc, /* special_function */
290 "R_CRIS_JUMP_SLOT", /* name */
291 FALSE, /* partial_inplace */
292 0, /* src_mask */
293 0, /* dst_mask */
294 FALSE), /* pcrel_offset */
295
296 /* Used only by the dynamic linker. When the object is run, this
297 longword is set to the load address of the object, plus the
298 addend. */
299 HOWTO (R_CRIS_RELATIVE, /* type */
300 0, /* rightshift */
301 2, /* size (0 = byte, 1 = short, 2 = long) */
302 32, /* bitsize */
303 FALSE, /* pc_relative */
304 0, /* bitpos */
305 complain_overflow_bitfield, /* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_CRIS_RELATIVE", /* name */
308 FALSE, /* partial_inplace */
309 0, /* src_mask */
310 0xffffffff, /* dst_mask */
311 FALSE), /* pcrel_offset */
312
313 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
314 HOWTO (R_CRIS_16_GOT, /* type */
315 0, /* rightshift */
316 1, /* size (0 = byte, 1 = short, 2 = long) */
317 16, /* bitsize */
318 FALSE, /* pc_relative */
319 0, /* bitpos */
320 complain_overflow_bitfield, /* complain_on_overflow */
321 bfd_elf_generic_reloc, /* special_function */
322 "R_CRIS_16_GOT", /* name */
323 FALSE, /* partial_inplace */
324 0, /* src_mask */
325 0xffff, /* dst_mask */
326 FALSE), /* pcrel_offset */
327
328 HOWTO (R_CRIS_32_GOT, /* type */
329 0, /* rightshift */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
331 32, /* bitsize */
332 FALSE, /* pc_relative */
333 0, /* bitpos */
334 complain_overflow_bitfield, /* complain_on_overflow */
335 bfd_elf_generic_reloc, /* special_function */
336 "R_CRIS_32_GOT", /* name */
337 FALSE, /* partial_inplace */
338 0, /* src_mask */
339 0xffffffff, /* dst_mask */
340 FALSE), /* pcrel_offset */
341
342 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
343 the GOT table for the symbol. */
344 HOWTO (R_CRIS_16_GOTPLT, /* type */
345 0, /* rightshift */
346 1, /* size (0 = byte, 1 = short, 2 = long) */
347 16, /* bitsize */
348 FALSE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_bitfield, /* complain_on_overflow */
351 bfd_elf_generic_reloc, /* special_function */
352 "R_CRIS_16_GOTPLT", /* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0xffff, /* dst_mask */
356 FALSE), /* pcrel_offset */
357
358 HOWTO (R_CRIS_32_GOTPLT, /* type */
359 0, /* rightshift */
360 2, /* size (0 = byte, 1 = short, 2 = long) */
361 32, /* bitsize */
362 FALSE, /* pc_relative */
363 0, /* bitpos */
364 complain_overflow_bitfield, /* complain_on_overflow */
365 bfd_elf_generic_reloc, /* special_function */
366 "R_CRIS_32_GOTPLT", /* name */
367 FALSE, /* partial_inplace */
368 0, /* src_mask */
369 0xffffffff, /* dst_mask */
370 FALSE), /* pcrel_offset */
371
372 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
373 be necessary. */
374 HOWTO (R_CRIS_32_GOTREL, /* type */
375 0, /* rightshift */
376 2, /* size (0 = byte, 1 = short, 2 = long) */
377 32, /* bitsize */
378 FALSE, /* pc_relative */
379 0, /* bitpos */
380 complain_overflow_bitfield, /* complain_on_overflow */
381 bfd_elf_generic_reloc, /* special_function */
382 "R_CRIS_32_GOTREL", /* name */
383 FALSE, /* partial_inplace */
384 0, /* src_mask */
385 0xffffffff, /* dst_mask */
386 FALSE), /* pcrel_offset */
387
388 /* A 32-bit offset from GOT to entry for this symbol in PLT and request
389 to create PLT entry for symbol. */
390 HOWTO (R_CRIS_32_PLT_GOTREL, /* type */
391 0, /* rightshift */
392 2, /* size (0 = byte, 1 = short, 2 = long) */
393 32, /* bitsize */
394 FALSE, /* pc_relative */
395 0, /* bitpos */
396 complain_overflow_bitfield, /* complain_on_overflow */
397 bfd_elf_generic_reloc, /* special_function */
398 "R_CRIS_32_PLT_GOTREL", /* name */
399 FALSE, /* partial_inplace */
400 0, /* src_mask */
401 0xffffffff, /* dst_mask */
402 FALSE), /* pcrel_offset */
403
404 /* A 32-bit offset from PC (location after the relocation) + addend to
405 entry for this symbol in PLT and request to create PLT entry for
406 symbol. */
407 HOWTO (R_CRIS_32_PLT_PCREL, /* type */
408 0, /* rightshift */
409 2, /* size (0 = byte, 1 = short, 2 = long) */
410 32, /* bitsize */
411 TRUE, /* pc_relative */
412 0, /* bitpos */
413 complain_overflow_bitfield, /* complain_on_overflow */
414 cris_elf_pcrel_reloc, /* special_function */
415 "R_CRIS_32_PLT_PCREL", /* name */
416 FALSE, /* partial_inplace */
417 0, /* src_mask */
418 0xffffffff, /* dst_mask */
419 TRUE) /* pcrel_offset */
420 };
421 \f
422 /* Map BFD reloc types to CRIS ELF reloc types. */
423
424 struct cris_reloc_map
425 {
426 bfd_reloc_code_real_type bfd_reloc_val;
427 unsigned int cris_reloc_val;
428 };
429
430 static const struct cris_reloc_map cris_reloc_map [] =
431 {
432 { BFD_RELOC_NONE, R_CRIS_NONE },
433 { BFD_RELOC_8, R_CRIS_8 },
434 { BFD_RELOC_16, R_CRIS_16 },
435 { BFD_RELOC_32, R_CRIS_32 },
436 { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL },
437 { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL },
438 { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL },
439 { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT },
440 { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY },
441 { BFD_RELOC_CRIS_COPY, R_CRIS_COPY },
442 { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT },
443 { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT },
444 { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE },
445 { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT },
446 { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT },
447 { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT },
448 { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT },
449 { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL },
450 { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
451 { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL }
452 };
453
454 static reloc_howto_type *
455 cris_reloc_type_lookup (abfd, code)
456 bfd * abfd ATTRIBUTE_UNUSED;
457 bfd_reloc_code_real_type code;
458 {
459 unsigned int i;
460
461 for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
462 if (cris_reloc_map [i].bfd_reloc_val == code)
463 return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
464
465 return NULL;
466 }
467
468 /* Set the howto pointer for an CRIS ELF reloc. */
469
470 static void
471 cris_info_to_howto_rela (abfd, cache_ptr, dst)
472 bfd * abfd ATTRIBUTE_UNUSED;
473 arelent * cache_ptr;
474 Elf_Internal_Rela * dst;
475 {
476 unsigned int r_type;
477
478 r_type = ELF32_R_TYPE (dst->r_info);
479 BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
480 cache_ptr->howto = & cris_elf_howto_table [r_type];
481 }
482
483 bfd_reloc_status_type
484 cris_elf_pcrel_reloc (abfd, reloc_entry, symbol, data, input_section,
485 output_bfd, error_message)
486 bfd *abfd ATTRIBUTE_UNUSED;
487 arelent *reloc_entry;
488 asymbol *symbol;
489 PTR data ATTRIBUTE_UNUSED;
490 asection *input_section;
491 bfd *output_bfd;
492 char **error_message ATTRIBUTE_UNUSED;
493 {
494 /* By default (using only bfd_elf_generic_reloc when linking to
495 non-ELF formats) PC-relative relocs are relative to the beginning
496 of the reloc. CRIS PC-relative relocs are relative to the position
497 *after* the reloc because that's what pre-CRISv32 PC points to
498 after reading an insn field with that reloc. (For CRISv32, PC is
499 actually relative to the start of the insn, but we keep the old
500 definition.) Still, we use as much generic machinery as we can.
501
502 Only adjust when doing a final link. */
503 if (output_bfd == (bfd *) NULL)
504 reloc_entry->addend -= 1 << reloc_entry->howto->size;
505
506 return
507 bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
508 input_section, output_bfd, error_message);
509 }
510 \f
511 /* Support for core dump NOTE sections.
512 The slightly unintuitive code layout is an attempt to keep at least
513 some similarities with other ports, hoping to simplify general
514 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
515
516 static bfd_boolean
517 cris_elf_grok_prstatus (abfd, note)
518 bfd *abfd;
519 Elf_Internal_Note *note;
520 {
521 int offset;
522 size_t size;
523
524 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
525 switch (note->descsz)
526 {
527 default:
528 return FALSE;
529
530 case 202: /* Linux/CRISv32 */
531 /* pr_cursig */
532 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
533
534 /* pr_pid */
535 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
536
537 /* pr_reg */
538 offset = 70;
539 size = 128;
540
541 break;
542 }
543 else
544 switch (note->descsz)
545 {
546 default:
547 return FALSE;
548
549 case 214: /* Linux/CRIS */
550 /* pr_cursig */
551 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
552
553 /* pr_pid */
554 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
555
556 /* pr_reg */
557 offset = 70;
558 size = 140;
559
560 break;
561 }
562
563 /* Make a ".reg/999" section. */
564 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
565 size, note->descpos + offset);
566 }
567
568 static bfd_boolean
569 cris_elf_grok_psinfo (abfd, note)
570 bfd *abfd;
571 Elf_Internal_Note *note;
572 {
573 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
574 switch (note->descsz)
575 {
576 default:
577 return FALSE;
578
579 case 124: /* Linux/CRISv32 elf_prpsinfo */
580 elf_tdata (abfd)->core_program
581 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
582 elf_tdata (abfd)->core_command
583 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
584 }
585 else
586 switch (note->descsz)
587 {
588 default:
589 return FALSE;
590
591 case 124: /* Linux/CRIS elf_prpsinfo */
592 elf_tdata (abfd)->core_program
593 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
594 elf_tdata (abfd)->core_command
595 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
596 }
597
598 /* Note that for some reason, a spurious space is tacked
599 onto the end of the args in some (at least one anyway)
600 implementations, so strip it off if it exists. */
601
602 {
603 char *command = elf_tdata (abfd)->core_command;
604 int n = strlen (command);
605
606 if (0 < n && command[n - 1] == ' ')
607 command[n - 1] = '\0';
608 }
609
610 return TRUE;
611 }
612 \f
613 /* The name of the dynamic interpreter. This is put in the .interp
614 section. */
615
616 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
617
618 /* The size in bytes of an entry in the procedure linkage table. */
619
620 #define PLT_ENTRY_SIZE 20
621 #define PLT_ENTRY_SIZE_V32 26
622
623 /* The first entry in an absolute procedure linkage table looks like this. */
624
625 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
626 {
627 0xfc, 0xe1,
628 0x7e, 0x7e, /* push mof. */
629 0x7f, 0x0d, /* (dip [pc+]) */
630 0, 0, 0, 0, /* Replaced with address of .got + 4. */
631 0x30, 0x7a, /* move [...],mof */
632 0x7f, 0x0d, /* (dip [pc+]) */
633 0, 0, 0, 0, /* Replaced with address of .got + 8. */
634 0x30, 0x09 /* jump [...] */
635 };
636
637 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
638 {
639 0x84, 0xe2, /* subq 4,$sp */
640 0x6f, 0xfe, /* move.d 0,$acr */
641 0, 0, 0, 0, /* Replaced by address of .got + 4. */
642 0x7e, 0x7a, /* move $mof,[$sp] */
643 0x3f, 0x7a, /* move [$acr],$mof */
644 0x04, 0xf2, /* addq 4,acr */
645 0x6f, 0xfa, /* move.d [$acr],$acr */
646 0xbf, 0x09, /* jump $acr */
647 0xb0, 0x05, /* nop */
648 0, 0 /* Pad out to 26 bytes. */
649 };
650
651 /* Subsequent entries in an absolute procedure linkage table look like
652 this. */
653
654 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
655 {
656 0x7f, 0x0d, /* (dip [pc+]) */
657 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
658 0x30, 0x09, /* jump [...] */
659 0x3f, 0x7e, /* move [pc+],mof */
660 0, 0, 0, 0, /* Replaced with offset into relocation table. */
661 0x2f, 0xfe, /* add.d [pc+],pc */
662 0xec, 0xff,
663 0xff, 0xff /* Replaced with offset to start of .plt. */
664 };
665
666 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
667 {
668 0x6f, 0xfe, /* move.d 0,$acr */
669 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
670 0x6f, 0xfa, /* move.d [$acr],$acr */
671 0xbf, 0x09, /* jump $acr */
672 0xb0, 0x05, /* nop */
673 0x3f, 0x7e, /* move 0,mof */
674 0, 0, 0, 0, /* Replaced with offset into relocation table. */
675 0xbf, 0x0e, /* ba start_of_plt0_entry */
676 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
677 0xb0, 0x05 /* nop */
678 };
679
680 /* The first entry in a PIC procedure linkage table looks like this. */
681
682 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
683 {
684 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
685 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
686 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
687 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
688 };
689
690 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
691 {
692 0x84, 0xe2, /* subq 4,$sp */
693 0x04, 0x01, /* addoq 4,$r0,$acr */
694 0x7e, 0x7a, /* move $mof,[$sp] */
695 0x3f, 0x7a, /* move [$acr],$mof */
696 0x04, 0xf2, /* addq 4,$acr */
697 0x6f, 0xfa, /* move.d [$acr],$acr */
698 0xbf, 0x09, /* jump $acr */
699 0xb0, 0x05, /* nop */
700 0, 0, /* Pad out to 26 bytes. */
701 0, 0, 0, 0,
702 0, 0, 0, 0
703 };
704
705 /* Subsequent entries in a PIC procedure linkage table look like this. */
706
707 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
708 {
709 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
710 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
711 0x30, 0x09, /* jump [...] */
712 0x3f, 0x7e, /* move [pc+],mof */
713 0, 0, 0, 0, /* Replaced with offset into relocation table. */
714 0x2f, 0xfe, /* add.d [pc+],pc */
715 0xec, 0xff, /* Replaced with offset to start of .plt. */
716 0xff, 0xff
717 };
718
719 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
720 {
721 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
722 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
723 0x6f, 0xfa, /* move.d [$acr],$acr */
724 0xbf, 0x09, /* jump $acr */
725 0xb0, 0x05, /* nop */
726 0x3f, 0x7e, /* move relocoffs,$mof */
727 0, 0, 0, 0, /* Replaced with offset into relocation table. */
728 0xbf, 0x0e, /* ba start_of_plt */
729 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
730 0xb0, 0x05 /* nop */
731 };
732 \f
733 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
734 (and most other PIC/shlib stuff). Check that we don't drift away
735 without reason.
736
737 The CRIS linker, like the m68k and i386 linkers (and probably the rest
738 too) needs to keep track of the number of relocs that it decides to
739 copy in check_relocs for each symbol. This is so that it can discard
740 PC relative relocs if it doesn't need them when linking with
741 -Bsymbolic. We store the information in a field extending the regular
742 ELF linker hash table. */
743
744 /* This structure keeps track of the number of PC relative relocs we have
745 copied for a given symbol. */
746
747 struct elf_cris_pcrel_relocs_copied
748 {
749 /* Next section. */
750 struct elf_cris_pcrel_relocs_copied *next;
751 /* A section in dynobj. */
752 asection *section;
753 /* Number of relocs copied in this section. */
754 bfd_size_type count;
755 };
756
757 /* CRIS ELF linker hash entry. */
758
759 struct elf_cris_link_hash_entry
760 {
761 struct elf_link_hash_entry root;
762
763 /* Number of PC relative relocs copied for this symbol. */
764 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
765
766 /* The GOTPLT references are CRIS-specific; the goal is to avoid having
767 both a general GOT and a PLT-specific GOT entry for the same symbol,
768 when it is referenced both as a function and as a function pointer.
769
770 Number of GOTPLT references for a function. */
771 bfd_signed_vma gotplt_refcount;
772
773 /* Actual GOTPLT index for this symbol, if applicable, or zero if not
774 (zero is never used as an index). FIXME: We should be able to fold
775 this with gotplt_refcount in a union, like the got and plt unions in
776 elf_link_hash_entry. */
777 bfd_size_type gotplt_offset;
778 };
779
780 /* CRIS ELF linker hash table. */
781
782 struct elf_cris_link_hash_table
783 {
784 struct elf_link_hash_table root;
785
786 /* We can't use the PLT offset and calculate to get the GOTPLT offset,
787 since we try and avoid creating GOTPLT:s when there's already a GOT.
788 Instead, we keep and update the next available index here. */
789 bfd_size_type next_gotplt_entry;
790 };
791
792 /* Traverse a CRIS ELF linker hash table. */
793
794 #define elf_cris_link_hash_traverse(table, func, info) \
795 (elf_link_hash_traverse \
796 (&(table)->root, \
797 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
798 (info)))
799
800 /* Get the CRIS ELF linker hash table from a link_info structure. */
801
802 #define elf_cris_hash_table(p) \
803 ((struct elf_cris_link_hash_table *) (p)->hash)
804
805 /* Create an entry in a CRIS ELF linker hash table. */
806
807 static struct bfd_hash_entry *
808 elf_cris_link_hash_newfunc (entry, table, string)
809 struct bfd_hash_entry *entry;
810 struct bfd_hash_table *table;
811 const char *string;
812 {
813 struct elf_cris_link_hash_entry *ret =
814 (struct elf_cris_link_hash_entry *) entry;
815
816 /* Allocate the structure if it has not already been allocated by a
817 subclass. */
818 if (ret == (struct elf_cris_link_hash_entry *) NULL)
819 ret = ((struct elf_cris_link_hash_entry *)
820 bfd_hash_allocate (table,
821 sizeof (struct elf_cris_link_hash_entry)));
822 if (ret == (struct elf_cris_link_hash_entry *) NULL)
823 return (struct bfd_hash_entry *) ret;
824
825 /* Call the allocation method of the superclass. */
826 ret = ((struct elf_cris_link_hash_entry *)
827 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
828 table, string));
829 if (ret != (struct elf_cris_link_hash_entry *) NULL)
830 {
831 ret->pcrel_relocs_copied = NULL;
832 ret->gotplt_refcount = 0;
833 ret->gotplt_offset = 0;
834 }
835
836 return (struct bfd_hash_entry *) ret;
837 }
838
839 /* Create a CRIS ELF linker hash table. */
840
841 static struct bfd_link_hash_table *
842 elf_cris_link_hash_table_create (abfd)
843 bfd *abfd;
844 {
845 struct elf_cris_link_hash_table *ret;
846 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
847
848 ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
849 if (ret == (struct elf_cris_link_hash_table *) NULL)
850 return NULL;
851
852 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
853 elf_cris_link_hash_newfunc))
854 {
855 free (ret);
856 return NULL;
857 }
858
859 /* Initialize to skip over the first three entries in the gotplt; they
860 are used for run-time symbol evaluation. */
861 ret->next_gotplt_entry = 12;
862
863 return &ret->root.root;
864 }
865 \f
866 /* Perform a single relocation. By default we use the standard BFD
867 routines, with a few tweaks. */
868
869 static bfd_reloc_status_type
870 cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
871 relocation)
872 reloc_howto_type * howto;
873 bfd * input_bfd;
874 asection * input_section;
875 bfd_byte * contents;
876 Elf_Internal_Rela * rel;
877 bfd_vma relocation;
878 {
879 bfd_reloc_status_type r;
880
881 /* PC-relative relocations are relative to the position *after*
882 the reloc. Note that for R_CRIS_8_PCREL the adjustment is
883 not a single byte, since PC must be 16-bit-aligned. */
884 switch (ELF32_R_TYPE (rel->r_info))
885 {
886 /* Check that the 16-bit GOT relocs are positive. */
887 case R_CRIS_16_GOTPLT:
888 case R_CRIS_16_GOT:
889 if ((bfd_signed_vma) relocation < 0)
890 return bfd_reloc_overflow;
891 break;
892
893 case R_CRIS_32_PLT_PCREL:
894 case R_CRIS_32_PCREL:
895 relocation -= 2;
896 /* Fall through. */
897 case R_CRIS_8_PCREL:
898 case R_CRIS_16_PCREL:
899 relocation -= 2;
900 break;
901
902 default:
903 break;
904 }
905
906 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
907 contents, rel->r_offset,
908 relocation, rel->r_addend);
909 return r;
910 }
911 \f
912 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
913 copied, for further comments. */
914
915 static bfd_boolean
916 cris_elf_relocate_section (output_bfd, info, input_bfd, input_section,
917 contents, relocs, local_syms, local_sections)
918 bfd *output_bfd ATTRIBUTE_UNUSED;
919 struct bfd_link_info *info;
920 bfd *input_bfd;
921 asection *input_section;
922 bfd_byte *contents;
923 Elf_Internal_Rela *relocs;
924 Elf_Internal_Sym *local_syms;
925 asection **local_sections;
926 {
927 bfd *dynobj;
928 Elf_Internal_Shdr *symtab_hdr;
929 struct elf_link_hash_entry **sym_hashes;
930 bfd_vma *local_got_offsets;
931 asection *sgot;
932 asection *splt;
933 asection *sreloc;
934 Elf_Internal_Rela *rel;
935 Elf_Internal_Rela *relend;
936
937 if (info->relocatable)
938 return TRUE;
939
940 dynobj = elf_hash_table (info)->dynobj;
941 local_got_offsets = elf_local_got_offsets (input_bfd);
942 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
943 sym_hashes = elf_sym_hashes (input_bfd);
944 relend = relocs + input_section->reloc_count;
945
946 sgot = NULL;
947 splt = NULL;
948 sreloc = NULL;
949
950 if (dynobj != NULL)
951 {
952 splt = bfd_get_section_by_name (dynobj, ".plt");
953 sgot = bfd_get_section_by_name (dynobj, ".got");
954 }
955
956 for (rel = relocs; rel < relend; rel ++)
957 {
958 reloc_howto_type *howto;
959 unsigned long r_symndx;
960 Elf_Internal_Sym *sym;
961 asection *sec;
962 struct elf_link_hash_entry *h;
963 bfd_vma relocation;
964 bfd_reloc_status_type r;
965 const char *symname = NULL;
966 int r_type;
967
968 r_type = ELF32_R_TYPE (rel->r_info);
969
970 if ( r_type == R_CRIS_GNU_VTINHERIT
971 || r_type == R_CRIS_GNU_VTENTRY)
972 continue;
973
974 /* This is a final link. */
975 r_symndx = ELF32_R_SYM (rel->r_info);
976 howto = cris_elf_howto_table + r_type;
977 h = NULL;
978 sym = NULL;
979 sec = NULL;
980
981 if (r_symndx < symtab_hdr->sh_info)
982 {
983 sym = local_syms + r_symndx;
984 sec = local_sections [r_symndx];
985 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
986
987 symname = (bfd_elf_string_from_elf_section
988 (input_bfd, symtab_hdr->sh_link, sym->st_name));
989 if (symname == NULL)
990 symname = bfd_section_name (input_bfd, sec);
991 }
992 else
993 {
994 bfd_boolean warned;
995 bfd_boolean unresolved_reloc;
996
997 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
998 r_symndx, symtab_hdr, sym_hashes,
999 h, sec, relocation,
1000 unresolved_reloc, warned);
1001
1002 if (unresolved_reloc
1003 /* Perhaps we should detect the cases that
1004 sec->output_section is expected to be NULL like i386 and
1005 m68k, but apparently (and according to elfxx-ia64.c) all
1006 valid cases are where the symbol is defined in a shared
1007 object which we link dynamically against. This includes
1008 PLT relocs for which we've created a PLT entry and other
1009 relocs for which we're prepared to create dynamic
1010 relocations.
1011
1012 For now, new situations cause us to just err when
1013 sec->output_offset is NULL but the object with the symbol
1014 is *not* dynamically linked against. Thus this will
1015 automatically remind us so we can see if there are other
1016 valid cases we need to revisit. */
1017 && (sec->owner->flags & DYNAMIC) != 0)
1018 relocation = 0;
1019
1020 else if (h->root.type == bfd_link_hash_defined
1021 || h->root.type == bfd_link_hash_defweak)
1022 {
1023 /* Here follow the cases where the relocation value must
1024 be zero (or when further handling is simplified when
1025 zero). I can't claim to understand the various
1026 conditions and they weren't described in the files
1027 where I copied them from (elf32-m68k.c and
1028 elf32-i386.c), but let's mention examples of where
1029 they happen. FIXME: Perhaps define and use a
1030 dynamic_symbol_p function like ia64.
1031
1032 - When creating a shared library, we can have an
1033 ordinary relocation for a symbol defined in a shared
1034 library (perhaps the one we create). We then make
1035 the relocation value zero, as the value seen now will
1036 be added into the relocation addend in this shared
1037 library, but must be handled only at dynamic-link
1038 time. FIXME: Not sure this example covers the
1039 h->elf_link_hash_flags test, though it's there in
1040 other targets. */
1041 if (info->shared
1042 && ((! info->symbolic && h->dynindx != -1)
1043 || !h->def_regular)
1044 && (input_section->flags & SEC_ALLOC) != 0
1045 && (r_type == R_CRIS_8
1046 || r_type == R_CRIS_16
1047 || r_type == R_CRIS_32
1048 || r_type == R_CRIS_8_PCREL
1049 || r_type == R_CRIS_16_PCREL
1050 || r_type == R_CRIS_32_PCREL))
1051 relocation = 0;
1052 else if (unresolved_reloc)
1053 {
1054 _bfd_error_handler
1055 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1056 input_bfd,
1057 input_section,
1058 cris_elf_howto_table[r_type].name,
1059 symname);
1060 bfd_set_error (bfd_error_bad_value);
1061 return FALSE;
1062 }
1063 }
1064 }
1065
1066 switch (r_type)
1067 {
1068 case R_CRIS_16_GOTPLT:
1069 case R_CRIS_32_GOTPLT:
1070 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1071 but we require a PLT, and the PLT handling will take care of
1072 filling in the PLT-specific GOT entry. For the GOT offset,
1073 calculate it as we do when filling it in for the .got.plt
1074 section. If we don't have a PLT, punt to GOT handling. */
1075 if (h != NULL
1076 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1077 {
1078 asection *sgotplt
1079 = bfd_get_section_by_name (dynobj, ".got.plt");
1080 bfd_vma got_offset;
1081
1082 BFD_ASSERT (h->dynindx != -1);
1083 BFD_ASSERT (sgotplt != NULL);
1084
1085 got_offset
1086 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1087
1088 relocation = got_offset;
1089 break;
1090 }
1091
1092 /* We didn't make a PLT entry for this symbol. Maybe everything is
1093 folded into the GOT. Other than folding, this happens when
1094 statically linking PIC code, or when using -Bsymbolic. Check
1095 that we instead have a GOT entry as done for us by
1096 elf_cris_adjust_dynamic_symbol, and drop through into the
1097 ordinary GOT cases. This must not happen for the
1098 executable, because any reference it does to a function
1099 that is satisfied by a DSO must generate a PLT. We assume
1100 these call-specific relocs don't address non-functions. */
1101 if (h != NULL
1102 && (h->got.offset == (bfd_vma) -1
1103 || (!info->shared
1104 && !(h->def_regular
1105 || (!h->def_dynamic
1106 && h->root.type == bfd_link_hash_undefweak)))))
1107 {
1108 (*_bfd_error_handler)
1109 ((h->got.offset == (bfd_vma) -1)
1110 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1111 " against symbol `%s'")
1112 : _("%B, section %A: No PLT for relocation %s"
1113 " against symbol `%s'"),
1114 input_bfd,
1115 input_section,
1116 cris_elf_howto_table[r_type].name,
1117 (symname != NULL && symname[0] != '\0'
1118 ? symname : _("[whose name is lost]")));
1119
1120 /* FIXME: Perhaps blaming input is not the right thing to
1121 do; this is probably an internal error. But it is true
1122 that we didn't like that particular input. */
1123 bfd_set_error (bfd_error_bad_value);
1124 return FALSE;
1125 }
1126 /* Fall through. */
1127
1128 /* The size of the actual relocation is not used here; we only
1129 fill in the GOT table here. */
1130 case R_CRIS_16_GOT:
1131 case R_CRIS_32_GOT:
1132 {
1133 bfd_vma off;
1134
1135 /* Note that despite using RELA relocations, the .got contents
1136 is always filled in with the link-relative relocation
1137 value; the addend. */
1138
1139 if (h != NULL)
1140 {
1141 off = h->got.offset;
1142 BFD_ASSERT (off != (bfd_vma) -1);
1143
1144 if (!elf_hash_table (info)->dynamic_sections_created
1145 || (! info->shared
1146 && (h->def_regular
1147 || h->type == STT_FUNC
1148 || h->needs_plt))
1149 || (info->shared
1150 && (info->symbolic || h->dynindx == -1)
1151 && h->def_regular))
1152 {
1153 /* This wasn't checked above for ! info->shared, but
1154 must hold there if we get here; the symbol must
1155 be defined in the regular program or be undefweak
1156 or be a function or otherwise need a PLT. */
1157 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1158 || info->shared
1159 || h->def_regular
1160 || h->type == STT_FUNC
1161 || h->needs_plt
1162 || h->root.type == bfd_link_hash_undefweak);
1163
1164 /* This is actually a static link, or it is a
1165 -Bsymbolic link and the symbol is defined locally,
1166 or is undefweak, or the symbol was forced to be
1167 local because of a version file, or we're not
1168 creating a dynamic object. We must initialize this
1169 entry in the global offset table. Since the offset
1170 must always be a multiple of 4, we use the least
1171 significant bit to record whether we have
1172 initialized it already.
1173
1174 If this GOT entry should be runtime-initialized, we
1175 will create a .rela.got relocation entry to
1176 initialize the value. This is done in the
1177 finish_dynamic_symbol routine. */
1178 if ((off & 1) != 0)
1179 off &= ~1;
1180 else
1181 {
1182 bfd_put_32 (output_bfd, relocation,
1183 sgot->contents + off);
1184 h->got.offset |= 1;
1185 }
1186 }
1187 }
1188 else
1189 {
1190 BFD_ASSERT (local_got_offsets != NULL
1191 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1192
1193 off = local_got_offsets[r_symndx];
1194
1195 /* The offset must always be a multiple of 4. We use
1196 the least significant bit to record whether we have
1197 already generated the necessary reloc. */
1198 if ((off & 1) != 0)
1199 off &= ~1;
1200 else
1201 {
1202 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1203
1204 if (info->shared)
1205 {
1206 asection *s;
1207 Elf_Internal_Rela outrel;
1208 bfd_byte *loc;
1209
1210 s = bfd_get_section_by_name (dynobj, ".rela.got");
1211 BFD_ASSERT (s != NULL);
1212
1213 outrel.r_offset = (sgot->output_section->vma
1214 + sgot->output_offset
1215 + off);
1216 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1217 outrel.r_addend = relocation;
1218 loc = s->contents;
1219 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1220 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1221 }
1222
1223 local_got_offsets[r_symndx] |= 1;
1224 }
1225 }
1226
1227 relocation = sgot->output_offset + off;
1228 if (rel->r_addend != 0)
1229 {
1230 /* We can't do anything for a relocation which is against
1231 a symbol *plus offset*. GOT holds relocations for
1232 symbols. Make this an error; the compiler isn't
1233 allowed to pass us these kinds of things. */
1234 if (h == NULL)
1235 (*_bfd_error_handler)
1236 (_("%B, section %A: relocation %s with non-zero addend %d"
1237 " against local symbol"),
1238 input_bfd,
1239 input_section,
1240 cris_elf_howto_table[r_type].name,
1241 rel->r_addend);
1242 else
1243 (*_bfd_error_handler)
1244 (_("%B, section %A: relocation %s with non-zero addend %d"
1245 " against symbol `%s'"),
1246 input_bfd,
1247 input_section,
1248 cris_elf_howto_table[r_type].name,
1249 rel->r_addend,
1250 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1251
1252 bfd_set_error (bfd_error_bad_value);
1253 return FALSE;
1254 }
1255 }
1256 break;
1257
1258 case R_CRIS_32_GOTREL:
1259 /* This relocation must only be performed against local symbols.
1260 It's also ok when we link a program and the symbol is either
1261 defined in an ordinary (non-DSO) object or is undefined weak. */
1262 if (h != NULL
1263 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1264 && !(!info->shared
1265 && (h->def_regular
1266 || (!h->def_dynamic
1267 && h->root.type == bfd_link_hash_undefweak))))
1268 {
1269 (*_bfd_error_handler)
1270 (_("%B, section %A: relocation %s is"
1271 " not allowed for global symbol: `%s'"),
1272 input_bfd,
1273 input_section,
1274 cris_elf_howto_table[r_type].name,
1275 symname);
1276 bfd_set_error (bfd_error_bad_value);
1277 return FALSE;
1278 }
1279
1280 /* This can happen if we get a link error with the input ELF
1281 variant mismatching the output variant. Emit an error so
1282 it's noticed if it happens elsewhere. */
1283 if (sgot == NULL)
1284 {
1285 (*_bfd_error_handler)
1286 (_("%B, section %A: relocation %s with no GOT created"),
1287 input_bfd,
1288 input_section,
1289 cris_elf_howto_table[r_type].name);
1290 bfd_set_error (bfd_error_bad_value);
1291 return FALSE;
1292 }
1293
1294 /* This relocation is like a PC-relative one, except the
1295 reference point is the location of GOT. Note that
1296 sgot->output_offset is not involved in this calculation. We
1297 always want the start of entire .got section, not the
1298 position after the reserved header. */
1299 relocation -= sgot->output_section->vma;
1300 break;
1301
1302 case R_CRIS_32_PLT_PCREL:
1303 /* Relocation is to the entry for this symbol in the
1304 procedure linkage table. */
1305
1306 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1307 without using the procedure linkage table. */
1308 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1309 break;
1310
1311 if (h->plt.offset == (bfd_vma) -1
1312 || splt == NULL)
1313 {
1314 /* We didn't make a PLT entry for this symbol. This
1315 happens when statically linking PIC code, or when
1316 using -Bsymbolic. */
1317 break;
1318 }
1319
1320 relocation = (splt->output_section->vma
1321 + splt->output_offset
1322 + h->plt.offset);
1323 break;
1324
1325 case R_CRIS_32_PLT_GOTREL:
1326 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1327 start of the .got section. See also comment at
1328 R_CRIS_32_GOT. */
1329 relocation -= sgot->output_section->vma;
1330
1331 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1332 without using the procedure linkage table. */
1333 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1334 break;
1335
1336 if (h->plt.offset == (bfd_vma) -1
1337 || splt == NULL)
1338 {
1339 /* We didn't make a PLT entry for this symbol. This
1340 happens when statically linking PIC code, or when
1341 using -Bsymbolic. */
1342 break;
1343 }
1344
1345 relocation = (splt->output_section->vma
1346 + splt->output_offset
1347 + h->plt.offset
1348 - sgot->output_section->vma);
1349 break;
1350
1351 case R_CRIS_8_PCREL:
1352 case R_CRIS_16_PCREL:
1353 case R_CRIS_32_PCREL:
1354 /* If the symbol was local, we need no shlib-specific handling. */
1355 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1356 break;
1357
1358 /* Fall through. */
1359 case R_CRIS_8:
1360 case R_CRIS_16:
1361 case R_CRIS_32:
1362 if (info->shared
1363 && r_symndx != 0
1364 && (input_section->flags & SEC_ALLOC) != 0
1365 && ((r_type != R_CRIS_8_PCREL
1366 && r_type != R_CRIS_16_PCREL
1367 && r_type != R_CRIS_32_PCREL)
1368 || (!info->symbolic
1369 || !h->def_regular)))
1370 {
1371 Elf_Internal_Rela outrel;
1372 bfd_byte *loc;
1373 bfd_boolean skip, relocate;
1374
1375 /* When generating a shared object, these relocations
1376 are copied into the output file to be resolved at run
1377 time. */
1378
1379 if (sreloc == NULL)
1380 {
1381 const char *name;
1382
1383 name = (bfd_elf_string_from_elf_section
1384 (input_bfd,
1385 elf_elfheader (input_bfd)->e_shstrndx,
1386 elf_section_data (input_section)->rel_hdr.sh_name));
1387 if (name == NULL)
1388 return FALSE;
1389
1390 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1391 && strcmp (bfd_get_section_name (input_bfd,
1392 input_section),
1393 name + 5) == 0);
1394
1395 sreloc = bfd_get_section_by_name (dynobj, name);
1396
1397 /* That section should have been created in
1398 cris_elf_check_relocs, but that function will not be
1399 called for objects which fail in
1400 cris_elf_merge_private_bfd_data. */
1401 if (sreloc == NULL)
1402 {
1403 (*_bfd_error_handler)
1404 (_("%B: Internal inconsistency; no relocation section %s"),
1405 input_bfd,
1406 name);
1407
1408 bfd_set_error (bfd_error_bad_value);
1409 return FALSE;
1410 }
1411 }
1412
1413 skip = FALSE;
1414 relocate = FALSE;
1415
1416 outrel.r_offset =
1417 _bfd_elf_section_offset (output_bfd, info, input_section,
1418 rel->r_offset);
1419 if (outrel.r_offset == (bfd_vma) -1)
1420 skip = TRUE;
1421 else if (outrel.r_offset == (bfd_vma) -2)
1422 skip = TRUE, relocate = TRUE;
1423 outrel.r_offset += (input_section->output_section->vma
1424 + input_section->output_offset);
1425
1426 if (skip)
1427 memset (&outrel, 0, sizeof outrel);
1428 /* h->dynindx may be -1 if the symbol was marked to
1429 become local. */
1430 else if (h != NULL
1431 && ((! info->symbolic && h->dynindx != -1)
1432 || !h->def_regular))
1433 {
1434 BFD_ASSERT (h->dynindx != -1);
1435 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1436 outrel.r_addend = relocation + rel->r_addend;
1437 }
1438 else
1439 {
1440 if (r_type == R_CRIS_32)
1441 {
1442 relocate = TRUE;
1443 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1444 outrel.r_addend = relocation + rel->r_addend;
1445 }
1446 else
1447 {
1448 long indx;
1449
1450 if (bfd_is_abs_section (sec))
1451 indx = 0;
1452 else if (sec == NULL || sec->owner == NULL)
1453 {
1454 bfd_set_error (bfd_error_bad_value);
1455 return FALSE;
1456 }
1457 else
1458 {
1459 asection *osec;
1460
1461 osec = sec->output_section;
1462 indx = elf_section_data (osec)->dynindx;
1463 BFD_ASSERT (indx > 0);
1464 }
1465
1466 outrel.r_info = ELF32_R_INFO (indx, r_type);
1467 outrel.r_addend = relocation + rel->r_addend;
1468 }
1469 }
1470
1471 loc = sreloc->contents;
1472 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1473 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1474
1475 /* This reloc will be computed at runtime, so there's no
1476 need to do anything now, except for R_CRIS_32 relocations
1477 that have been turned into R_CRIS_RELATIVE. */
1478 if (!relocate)
1479 continue;
1480 }
1481
1482 break;
1483 }
1484
1485 r = cris_final_link_relocate (howto, input_bfd, input_section,
1486 contents, rel, relocation);
1487
1488 if (r != bfd_reloc_ok)
1489 {
1490 const char * msg = (const char *) NULL;
1491
1492 switch (r)
1493 {
1494 case bfd_reloc_overflow:
1495 r = info->callbacks->reloc_overflow
1496 (info, (h ? &h->root : NULL), symname, howto->name,
1497 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1498 break;
1499
1500 case bfd_reloc_undefined:
1501 r = info->callbacks->undefined_symbol
1502 (info, symname, input_bfd, input_section, rel->r_offset,
1503 TRUE);
1504 break;
1505
1506 case bfd_reloc_outofrange:
1507 msg = _("internal error: out of range error");
1508 break;
1509
1510 case bfd_reloc_notsupported:
1511 msg = _("internal error: unsupported relocation error");
1512 break;
1513
1514 case bfd_reloc_dangerous:
1515 msg = _("internal error: dangerous relocation");
1516 break;
1517
1518 default:
1519 msg = _("internal error: unknown error");
1520 break;
1521 }
1522
1523 if (msg)
1524 r = info->callbacks->warning
1525 (info, msg, symname, input_bfd, input_section, rel->r_offset);
1526
1527 if (! r)
1528 return FALSE;
1529 }
1530 }
1531
1532 return TRUE;
1533 }
1534 \f
1535 /* Finish up dynamic symbol handling. We set the contents of various
1536 dynamic sections here. */
1537
1538 static bfd_boolean
1539 elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym)
1540 bfd *output_bfd;
1541 struct bfd_link_info *info;
1542 struct elf_link_hash_entry *h;
1543 Elf_Internal_Sym *sym;
1544 {
1545 bfd *dynobj;
1546
1547 /* Where in the plt entry to put values. */
1548 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
1549
1550 /* What offset to add to the distance to the first PLT entry for the
1551 value at plt_off3. */
1552 int plt_off3_value_bias = 4;
1553
1554 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
1555 for PIC and non-PIC for v32 and pre-v32). */
1556 int plt_stub_offset = 8;
1557 int plt_entry_size = PLT_ENTRY_SIZE;
1558 const bfd_byte *plt_entry = elf_cris_plt_entry;
1559 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
1560
1561 /* Adjust the various PLT entry offsets. */
1562 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1563 {
1564 plt_off2 = 14;
1565 plt_off3 = 20;
1566 plt_off3_value_bias = -2;
1567 plt_stub_offset = 12;
1568 plt_entry_size = PLT_ENTRY_SIZE_V32;
1569 plt_entry = elf_cris_plt_entry_v32;
1570 plt_pic_entry = elf_cris_pic_plt_entry_v32;
1571 }
1572
1573 dynobj = elf_hash_table (info)->dynobj;
1574
1575 if (h->plt.offset != (bfd_vma) -1)
1576 {
1577 asection *splt;
1578 asection *sgotplt;
1579 asection *sgot;
1580 asection *srela;
1581 bfd_vma got_base;
1582
1583 bfd_vma gotplt_offset
1584 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1585 Elf_Internal_Rela rela;
1586 bfd_byte *loc;
1587 bfd_boolean has_gotplt = gotplt_offset != 0;
1588
1589 /* Get the index in the procedure linkage table which
1590 corresponds to this symbol. This is the index of this symbol
1591 in all the symbols for which we are making plt entries. The
1592 first entry in the procedure linkage table is reserved. */
1593 /* We have to count backwards here, and the result is only valid as
1594 an index into .got.plt and its relocations. FIXME: Constants... */
1595 bfd_vma gotplt_index = gotplt_offset/4 - 3;
1596
1597 /* Get the offset into the .got table of the entry that corresponds
1598 to this function. Note that we embed knowledge that "incoming"
1599 .got goes after .got.plt in the output without padding (pointer
1600 aligned). However, that knowledge is present in several other
1601 places too. */
1602 bfd_vma got_offset
1603 = (has_gotplt
1604 ? gotplt_offset
1605 : h->got.offset + elf_cris_hash_table(info)->next_gotplt_entry);
1606
1607 /* This symbol has an entry in the procedure linkage table. Set it
1608 up. */
1609
1610 BFD_ASSERT (h->dynindx != -1);
1611
1612 splt = bfd_get_section_by_name (dynobj, ".plt");
1613 sgot = bfd_get_section_by_name (dynobj, ".got");
1614 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1615 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1616 BFD_ASSERT (splt != NULL && sgotplt != NULL
1617 && (! has_gotplt || srela != NULL));
1618
1619 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
1620
1621 /* Fill in the entry in the procedure linkage table. */
1622 if (! info->shared)
1623 {
1624 memcpy (splt->contents + h->plt.offset, plt_entry,
1625 plt_entry_size);
1626
1627 /* We need to enter the absolute address of the GOT entry here. */
1628 bfd_put_32 (output_bfd, got_base + got_offset,
1629 splt->contents + h->plt.offset + plt_off1);
1630 }
1631 else
1632 {
1633 memcpy (splt->contents + h->plt.offset, plt_pic_entry,
1634 plt_entry_size);
1635 bfd_put_32 (output_bfd, got_offset,
1636 splt->contents + h->plt.offset + plt_off1);
1637 }
1638
1639 /* Fill in the plt entry and make a relocation, if this is a "real"
1640 PLT entry. */
1641 if (has_gotplt)
1642 {
1643 /* Fill in the offset to the reloc table. */
1644 bfd_put_32 (output_bfd,
1645 gotplt_index * sizeof (Elf32_External_Rela),
1646 splt->contents + h->plt.offset + plt_off2);
1647
1648 /* Fill in the offset to the first PLT entry, where to "jump". */
1649 bfd_put_32 (output_bfd,
1650 - (h->plt.offset + plt_off3 + plt_off3_value_bias),
1651 splt->contents + h->plt.offset + plt_off3);
1652
1653 /* Fill in the entry in the global offset table with the address of
1654 the relocating stub. */
1655 bfd_put_32 (output_bfd,
1656 (splt->output_section->vma
1657 + splt->output_offset
1658 + h->plt.offset
1659 + plt_stub_offset),
1660 sgotplt->contents + got_offset);
1661
1662 /* Fill in the entry in the .rela.plt section. */
1663 rela.r_offset = (sgotplt->output_section->vma
1664 + sgotplt->output_offset
1665 + got_offset);
1666 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
1667 rela.r_addend = 0;
1668 loc = srela->contents + gotplt_index * sizeof (Elf32_External_Rela);
1669 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1670 }
1671
1672 if (!h->def_regular)
1673 {
1674 /* Mark the symbol as undefined, rather than as defined in
1675 the .plt section. Leave the value alone. */
1676 sym->st_shndx = SHN_UNDEF;
1677
1678 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
1679 know whether resetting the value is significant; if it really
1680 is, rather than a quirk or bug in the sparc port, then I
1681 believe we'd see this elsewhere. */
1682 /* If the symbol is weak, we do need to clear the value.
1683 Otherwise, the PLT entry would provide a definition for
1684 the symbol even if the symbol wasn't defined anywhere,
1685 and so the symbol would never be NULL. */
1686 if (!h->ref_regular_nonweak)
1687 sym->st_value = 0;
1688 }
1689 }
1690
1691 /* For an ordinary program, we emit .got relocs only for symbols that
1692 are in the dynamic-symbols table and are either defined by the
1693 program or are undefined weak symbols, or are function symbols
1694 where we do not output a PLT: the PLT reloc was output above and all
1695 references to the function symbol are redirected to the PLT. */
1696 if (h->got.offset != (bfd_vma) -1
1697 && (info->shared
1698 || (h->dynindx != -1
1699 && h->plt.offset == (bfd_vma) -1
1700 && !h->def_regular
1701 && h->root.type != bfd_link_hash_undefweak)))
1702 {
1703 asection *sgot;
1704 asection *srela;
1705 Elf_Internal_Rela rela;
1706 bfd_byte *loc;
1707 bfd_byte *where;
1708
1709 /* This symbol has an entry in the global offset table. Set it up. */
1710
1711 sgot = bfd_get_section_by_name (dynobj, ".got");
1712 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1713 BFD_ASSERT (sgot != NULL && srela != NULL);
1714
1715 rela.r_offset = (sgot->output_section->vma
1716 + sgot->output_offset
1717 + (h->got.offset &~ (bfd_vma) 1));
1718
1719 /* If this is a static link, or it is a -Bsymbolic link and the
1720 symbol is defined locally or was forced to be local because
1721 of a version file, we just want to emit a RELATIVE reloc.
1722 The entry in the global offset table will already have been
1723 initialized in the relocate_section function. */
1724 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
1725 if (! elf_hash_table (info)->dynamic_sections_created
1726 || (info->shared
1727 && (info->symbolic || h->dynindx == -1)
1728 && h->def_regular))
1729 {
1730 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1731 rela.r_addend = bfd_get_signed_32 (output_bfd, where);
1732 }
1733 else
1734 {
1735 bfd_put_32 (output_bfd, (bfd_vma) 0, where);
1736 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
1737 rela.r_addend = 0;
1738 }
1739
1740 loc = srela->contents;
1741 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1742 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1743 }
1744
1745 if (h->needs_copy)
1746 {
1747 asection *s;
1748 Elf_Internal_Rela rela;
1749 bfd_byte *loc;
1750
1751 /* This symbol needs a copy reloc. Set it up. */
1752
1753 BFD_ASSERT (h->dynindx != -1
1754 && (h->root.type == bfd_link_hash_defined
1755 || h->root.type == bfd_link_hash_defweak));
1756
1757 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1758 ".rela.bss");
1759 BFD_ASSERT (s != NULL);
1760
1761 rela.r_offset = (h->root.u.def.value
1762 + h->root.u.def.section->output_section->vma
1763 + h->root.u.def.section->output_offset);
1764 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
1765 rela.r_addend = 0;
1766 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1767 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1768 }
1769
1770 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1771 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1772 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1773 sym->st_shndx = SHN_ABS;
1774
1775 return TRUE;
1776 }
1777 \f
1778 /* Finish up the dynamic sections. */
1779
1780 static bfd_boolean
1781 elf_cris_finish_dynamic_sections (output_bfd, info)
1782 bfd *output_bfd;
1783 struct bfd_link_info *info;
1784 {
1785 bfd *dynobj;
1786 asection *sgot;
1787 asection *sdyn;
1788
1789 dynobj = elf_hash_table (info)->dynobj;
1790
1791 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1792 BFD_ASSERT (sgot != NULL);
1793 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1794
1795 if (elf_hash_table (info)->dynamic_sections_created)
1796 {
1797 asection *splt;
1798 Elf32_External_Dyn *dyncon, *dynconend;
1799
1800 splt = bfd_get_section_by_name (dynobj, ".plt");
1801 BFD_ASSERT (splt != NULL && sdyn != NULL);
1802
1803 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1804 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1805 for (; dyncon < dynconend; dyncon++)
1806 {
1807 Elf_Internal_Dyn dyn;
1808 asection *s;
1809
1810 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1811
1812 switch (dyn.d_tag)
1813 {
1814 default:
1815 break;
1816
1817 case DT_PLTGOT:
1818 s = bfd_get_section_by_name (output_bfd, ".got");
1819 BFD_ASSERT (s != NULL);
1820 dyn.d_un.d_ptr = s->vma;
1821 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1822 break;
1823
1824 case DT_JMPREL:
1825 /* Yes, we *can* have a .plt and no .plt.rela, for instance
1826 if all symbols are found in the .got (not .got.plt). */
1827 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1828 dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
1829 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1830 break;
1831
1832 case DT_PLTRELSZ:
1833 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1834 if (s == NULL)
1835 dyn.d_un.d_val = 0;
1836 else
1837 dyn.d_un.d_val = s->size;
1838 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1839 break;
1840
1841 case DT_RELASZ:
1842 /* The procedure linkage table relocs (DT_JMPREL) should
1843 not be included in the overall relocs (DT_RELA).
1844 Therefore, we override the DT_RELASZ entry here to
1845 make it not include the JMPREL relocs. Since the
1846 linker script arranges for .rela.plt to follow all
1847 other relocation sections, we don't have to worry
1848 about changing the DT_RELA entry. */
1849 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1850 if (s != NULL)
1851 dyn.d_un.d_val -= s->size;
1852 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1853 break;
1854 }
1855 }
1856
1857 /* Fill in the first entry in the procedure linkage table. */
1858 if (splt->size > 0)
1859 {
1860 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1861 {
1862 if (info->shared)
1863 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
1864 PLT_ENTRY_SIZE_V32);
1865 else
1866 {
1867 memcpy (splt->contents, elf_cris_plt0_entry_v32,
1868 PLT_ENTRY_SIZE_V32);
1869 bfd_put_32 (output_bfd,
1870 sgot->output_section->vma
1871 + sgot->output_offset + 4,
1872 splt->contents + 4);
1873
1874 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1875 = PLT_ENTRY_SIZE_V32;
1876 }
1877 }
1878 else
1879 {
1880 if (info->shared)
1881 memcpy (splt->contents, elf_cris_pic_plt0_entry,
1882 PLT_ENTRY_SIZE);
1883 else
1884 {
1885 memcpy (splt->contents, elf_cris_plt0_entry,
1886 PLT_ENTRY_SIZE);
1887 bfd_put_32 (output_bfd,
1888 sgot->output_section->vma
1889 + sgot->output_offset + 4,
1890 splt->contents + 6);
1891 bfd_put_32 (output_bfd,
1892 sgot->output_section->vma
1893 + sgot->output_offset + 8,
1894 splt->contents + 14);
1895
1896 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1897 = PLT_ENTRY_SIZE;
1898 }
1899 }
1900 }
1901 }
1902
1903 /* Fill in the first three entries in the global offset table. */
1904 if (sgot->size > 0)
1905 {
1906 if (sdyn == NULL)
1907 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1908 else
1909 bfd_put_32 (output_bfd,
1910 sdyn->output_section->vma + sdyn->output_offset,
1911 sgot->contents);
1912 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1913 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1914 }
1915
1916 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1917
1918 return TRUE;
1919 }
1920 \f
1921 /* Return the section that should be marked against GC for a given
1922 relocation. */
1923
1924 static asection *
1925 cris_elf_gc_mark_hook (sec, info, rel, h, sym)
1926 asection *sec;
1927 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1928 Elf_Internal_Rela *rel;
1929 struct elf_link_hash_entry *h;
1930 Elf_Internal_Sym *sym;
1931 {
1932 if (h != NULL)
1933 {
1934 switch (ELF32_R_TYPE (rel->r_info))
1935 {
1936 case R_CRIS_GNU_VTINHERIT:
1937 case R_CRIS_GNU_VTENTRY:
1938 break;
1939
1940 default:
1941 switch (h->root.type)
1942 {
1943 case bfd_link_hash_defined:
1944 case bfd_link_hash_defweak:
1945 return h->root.u.def.section;
1946
1947 case bfd_link_hash_common:
1948 return h->root.u.c.p->section;
1949
1950 default:
1951 break;
1952 }
1953 }
1954 }
1955 else
1956 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1957
1958 return NULL;
1959 }
1960
1961 /* Update the got entry reference counts for the section being removed. */
1962
1963 static bfd_boolean
1964 cris_elf_gc_sweep_hook (abfd, info, sec, relocs)
1965 bfd *abfd ATTRIBUTE_UNUSED;
1966 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1967 asection *sec ATTRIBUTE_UNUSED;
1968 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
1969 {
1970 Elf_Internal_Shdr *symtab_hdr;
1971 struct elf_link_hash_entry **sym_hashes;
1972 bfd_signed_vma *local_got_refcounts;
1973 const Elf_Internal_Rela *rel, *relend;
1974 bfd *dynobj;
1975 asection *sgot;
1976 asection *srelgot;
1977
1978 dynobj = elf_hash_table (info)->dynobj;
1979 if (dynobj == NULL)
1980 return TRUE;
1981
1982 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1983 sym_hashes = elf_sym_hashes (abfd);
1984 local_got_refcounts = elf_local_got_refcounts (abfd);
1985
1986 sgot = bfd_get_section_by_name (dynobj, ".got");
1987 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1988
1989 relend = relocs + sec->reloc_count;
1990 for (rel = relocs; rel < relend; rel++)
1991 {
1992 unsigned long r_symndx;
1993 struct elf_link_hash_entry *h = NULL;
1994
1995 r_symndx = ELF32_R_SYM (rel->r_info);
1996 if (r_symndx >= symtab_hdr->sh_info)
1997 {
1998 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1999 while (h->root.type == bfd_link_hash_indirect
2000 || h->root.type == bfd_link_hash_warning)
2001 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2002 }
2003
2004 switch (ELF32_R_TYPE (rel->r_info))
2005 {
2006 case R_CRIS_16_GOT:
2007 case R_CRIS_32_GOT:
2008 if (h != NULL)
2009 {
2010 if (h->got.refcount > 0)
2011 {
2012 --h->got.refcount;
2013 if (h->got.refcount == 0)
2014 {
2015 /* We don't need the .got entry any more. */
2016 sgot->size -= 4;
2017 srelgot->size -= sizeof (Elf32_External_Rela);
2018 }
2019 }
2020 break;
2021 }
2022
2023 local_got_reloc:
2024 if (local_got_refcounts != NULL)
2025 {
2026 if (local_got_refcounts[r_symndx] > 0)
2027 {
2028 --local_got_refcounts[r_symndx];
2029 if (local_got_refcounts[r_symndx] == 0)
2030 {
2031 /* We don't need the .got entry any more. */
2032 sgot->size -= 4;
2033 if (info->shared)
2034 srelgot->size -= sizeof (Elf32_External_Rela);
2035 }
2036 }
2037 }
2038 break;
2039
2040 case R_CRIS_16_GOTPLT:
2041 case R_CRIS_32_GOTPLT:
2042 /* For local symbols, treat these like GOT relocs. */
2043 if (h == NULL)
2044 goto local_got_reloc;
2045 /* Fall through. */
2046
2047 case R_CRIS_32_PLT_GOTREL:
2048 /* FIXME: We don't garbage-collect away the .got section. */
2049 if (local_got_refcounts != NULL)
2050 local_got_refcounts[-1]--;
2051 /* Fall through. */
2052
2053 case R_CRIS_8_PCREL:
2054 case R_CRIS_16_PCREL:
2055 case R_CRIS_32_PCREL:
2056 case R_CRIS_32_PLT_PCREL:
2057 if (h != NULL)
2058 {
2059 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2060 && h->plt.refcount > 0)
2061 --h->plt.refcount;
2062 }
2063 break;
2064
2065 default:
2066 break;
2067 }
2068 }
2069
2070 return TRUE;
2071 }
2072
2073 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2074 entry but we found we will not create any. Called when we find we will
2075 not have any PLT for this symbol, by for example
2076 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2077 or elf_cris_size_dynamic_sections if no dynamic sections will be
2078 created (we're only linking static objects). */
2079
2080 static bfd_boolean
2081 elf_cris_adjust_gotplt_to_got (h, p)
2082 struct elf_cris_link_hash_entry *h;
2083 PTR p;
2084 {
2085 struct bfd_link_info *info = (struct bfd_link_info *) p;
2086
2087 if (h->root.root.type == bfd_link_hash_warning)
2088 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
2089
2090 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2091 if (h->gotplt_refcount <= 0)
2092 return TRUE;
2093
2094 if (h->root.got.refcount > 0)
2095 {
2096 /* There's a GOT entry for this symbol. Just adjust the refcount.
2097 Probably not necessary at this stage, but keeping it accurate
2098 helps avoiding surprises later. */
2099 h->root.got.refcount += h->gotplt_refcount;
2100 h->gotplt_refcount = 0;
2101 }
2102 else
2103 {
2104 /* No GOT entry for this symbol. We need to create one. */
2105 bfd *dynobj = elf_hash_table (info)->dynobj;
2106 asection *sgot;
2107 asection *srelgot;
2108
2109 BFD_ASSERT (dynobj != NULL);
2110 sgot = bfd_get_section_by_name (dynobj, ".got");
2111 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2112
2113 /* Put an accurate refcount there. */
2114 h->root.got.refcount = h->gotplt_refcount;
2115
2116 h->gotplt_refcount = 0;
2117
2118 /* We always have a .got and a .rela.got section if there were
2119 GOTPLT relocs in input. */
2120 BFD_ASSERT (sgot != NULL && srelgot != NULL);
2121
2122 /* Allocate space in the .got section. */
2123 sgot->size += 4;
2124
2125 /* Allocate relocation space. */
2126 srelgot->size += sizeof (Elf32_External_Rela);
2127 }
2128
2129 return TRUE;
2130 }
2131
2132 /* Try to fold PLT entries with GOT entries. There are two cases when we
2133 want to do this:
2134
2135 - When all PLT references are GOTPLT references, and there are GOT
2136 references, and this is not the executable. We don't have to
2137 generate a PLT at all.
2138
2139 - When there are both (ordinary) PLT references and GOT references,
2140 and this isn't the executable.
2141 We want to make the PLT reference use the ordinary GOT entry rather
2142 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2143 since the GOT entry will have to be resolved at startup anyway.
2144
2145 Though the latter case is handled when room for the PLT is allocated,
2146 not here.
2147
2148 By folding into the GOT, we may need a round-trip to a PLT in the
2149 executable for calls, a loss in performance. Still, losing a
2150 reloc is a win in size and at least in start-up time.
2151
2152 Note that this function is called before symbols are forced local by
2153 version scripts. The differing cases are handled by
2154 elf_cris_hide_symbol. */
2155
2156 static bfd_boolean
2157 elf_cris_try_fold_plt_to_got (h, p)
2158 struct elf_cris_link_hash_entry *h;
2159 PTR p;
2160 {
2161 struct bfd_link_info *info = (struct bfd_link_info *) p;
2162
2163 /* If there are no GOT references for this symbol, we can't fold any
2164 other reference so there's nothing to do. Likewise if there are no
2165 PLT references; GOTPLT references included. */
2166 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2167 return TRUE;
2168
2169 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2170 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2171
2172 if (h->gotplt_refcount == h->root.plt.refcount)
2173 {
2174 /* The only PLT references are GOTPLT references, and there are GOT
2175 references. Convert PLT to GOT references. */
2176 if (! elf_cris_adjust_gotplt_to_got (h, info))
2177 return FALSE;
2178
2179 /* Clear the PLT references, so no PLT will be created. */
2180 h->root.plt.offset = (bfd_vma) -1;
2181 }
2182
2183 return TRUE;
2184 }
2185
2186 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2187 to use a GOT entry (and create one) rather than requiring a GOTPLT
2188 entry. */
2189
2190 static void
2191 elf_cris_hide_symbol (info, h, force_local)
2192 struct bfd_link_info *info;
2193 struct elf_link_hash_entry *h;
2194 bfd_boolean force_local;
2195 {
2196 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2197
2198 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2199 }
2200
2201 /* Adjust a symbol defined by a dynamic object and referenced by a
2202 regular object. The current definition is in some section of the
2203 dynamic object, but we're not including those sections. We have to
2204 change the definition to something the rest of the link can
2205 understand. */
2206
2207 static bfd_boolean
2208 elf_cris_adjust_dynamic_symbol (info, h)
2209 struct bfd_link_info *info;
2210 struct elf_link_hash_entry *h;
2211 {
2212 bfd *dynobj;
2213 asection *s;
2214 unsigned int power_of_two;
2215 bfd_size_type plt_entry_size;
2216
2217 dynobj = elf_hash_table (info)->dynobj;
2218
2219 /* Make sure we know what is going on here. */
2220 BFD_ASSERT (dynobj != NULL
2221 && (h->needs_plt
2222 || h->u.weakdef != NULL
2223 || (h->def_dynamic
2224 && h->ref_regular
2225 && !h->def_regular)));
2226
2227 plt_entry_size
2228 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2229 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2230
2231 /* If this is a function, put it in the procedure linkage table. We
2232 will fill in the contents of the procedure linkage table later,
2233 when we know the address of the .got section. */
2234 if (h->type == STT_FUNC
2235 || h->needs_plt)
2236 {
2237 /* If we link a program (not a DSO), we'll get rid of unnecessary
2238 PLT entries; we point to the actual symbols -- even for pic
2239 relocs, because a program built with -fpic should have the same
2240 result as one built without -fpic, specifically considering weak
2241 symbols.
2242 FIXME: m68k and i386 differ here, for unclear reasons. */
2243 if (! info->shared
2244 && !h->def_dynamic)
2245 {
2246 /* This case can occur if we saw a PLT reloc in an input file,
2247 but the symbol was not defined by a dynamic object. In such
2248 a case, we don't actually need to build a procedure linkage
2249 table, and we can just do an absolute or PC reloc instead, or
2250 change a .got.plt index to a .got index for GOTPLT relocs. */
2251 BFD_ASSERT (h->needs_plt);
2252 h->needs_plt = 0;
2253 h->plt.offset = (bfd_vma) -1;
2254 return
2255 elf_cris_adjust_gotplt_to_got ((struct
2256 elf_cris_link_hash_entry *) h,
2257 info);
2258 }
2259
2260 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2261 where a pointer-equivalent symbol was unimportant (i.e. more
2262 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2263 of the PLT. We can't for the executable, because the GOT
2264 entries will point to the PLT there (and be constant). */
2265 if (info->shared
2266 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2267 h, info))
2268 return FALSE;
2269
2270 /* GC or folding may have rendered this entry unused. */
2271 if (h->plt.refcount <= 0)
2272 {
2273 h->needs_plt = 0;
2274 h->plt.offset = (bfd_vma) -1;
2275 return TRUE;
2276 }
2277
2278 /* Make sure this symbol is output as a dynamic symbol. */
2279 if (h->dynindx == -1)
2280 {
2281 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2282 return FALSE;
2283 }
2284
2285 s = bfd_get_section_by_name (dynobj, ".plt");
2286 BFD_ASSERT (s != NULL);
2287
2288 /* If this is the first .plt entry, make room for the special
2289 first entry. */
2290 if (s->size == 0)
2291 s->size += plt_entry_size;
2292
2293 /* If this symbol is not defined in a regular file, and we are
2294 not generating a shared library, then set the symbol to this
2295 location in the .plt. */
2296 if (!info->shared
2297 && !h->def_regular)
2298 {
2299 h->root.u.def.section = s;
2300 h->root.u.def.value = s->size;
2301 }
2302
2303 /* If there's already a GOT entry, use that, not a .got.plt. A
2304 GOT field still has a reference count when we get here; it's
2305 not yet changed to an offset. We can't do this for an
2306 executable, because then the reloc associated with the PLT
2307 would get a non-PLT reloc pointing to the PLT. FIXME: Move
2308 this to elf_cris_try_fold_plt_to_got. */
2309 if (info->shared && h->got.refcount > 0)
2310 {
2311 h->got.refcount += h->plt.refcount;
2312
2313 /* Mark the PLT offset to use the GOT entry by setting the low
2314 bit in the plt offset; it is always a multiple of
2315 plt_entry_size (which is at least a multiple of 2). */
2316 BFD_ASSERT ((s->size % plt_entry_size) == 0);
2317
2318 /* Change the PLT refcount to an offset. */
2319 h->plt.offset = s->size;
2320
2321 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2322 that the got entry should be used instead. */
2323 BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2324 h)->gotplt_offset == 0);
2325
2326 /* Make room for this entry. */
2327 s->size += plt_entry_size;
2328
2329 return TRUE;
2330 }
2331
2332 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2333 h->plt.offset = s->size;
2334
2335 /* Make room for this entry. */
2336 s->size += plt_entry_size;
2337
2338 /* We also need to make an entry in the .got.plt section, which
2339 will be placed in the .got section by the linker script. */
2340 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2341 = elf_cris_hash_table (info)->next_gotplt_entry;
2342 elf_cris_hash_table (info)->next_gotplt_entry += 4;
2343
2344 s = bfd_get_section_by_name (dynobj, ".got.plt");
2345 BFD_ASSERT (s != NULL);
2346 s->size += 4;
2347
2348 /* We also need to make an entry in the .rela.plt section. */
2349
2350 s = bfd_get_section_by_name (dynobj, ".rela.plt");
2351 BFD_ASSERT (s != NULL);
2352 s->size += sizeof (Elf32_External_Rela);
2353
2354 return TRUE;
2355 }
2356
2357 /* Reinitialize the plt offset now that it is not used as a reference
2358 count any more. */
2359 h->plt.offset = (bfd_vma) -1;
2360
2361 /* If this is a weak symbol, and there is a real definition, the
2362 processor independent code will have arranged for us to see the
2363 real definition first, and we can just use the same value. */
2364 if (h->u.weakdef != NULL)
2365 {
2366 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2367 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2368 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2369 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2370 return TRUE;
2371 }
2372
2373 /* This is a reference to a symbol defined by a dynamic object which
2374 is not a function. */
2375
2376 /* If we are creating a shared library, we must presume that the
2377 only references to the symbol are via the global offset table.
2378 For such cases we need not do anything here; the relocations will
2379 be handled correctly by relocate_section. */
2380 if (info->shared)
2381 return TRUE;
2382
2383 /* If there are no references to this symbol that do not use the
2384 GOT, we don't need to generate a copy reloc. */
2385 if (!h->non_got_ref)
2386 return TRUE;
2387
2388 if (h->size == 0)
2389 {
2390 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
2391 h->root.root.string);
2392 return TRUE;
2393 }
2394
2395 /* We must allocate the symbol in our .dynbss section, which will
2396 become part of the .bss section of the executable. There will be
2397 an entry for this symbol in the .dynsym section. The dynamic
2398 object will contain position independent code, so all references
2399 from the dynamic object to this symbol will go through the global
2400 offset table. The dynamic linker will use the .dynsym entry to
2401 determine the address it must put in the global offset table, so
2402 both the dynamic object and the regular object will refer to the
2403 same memory location for the variable. */
2404
2405 s = bfd_get_section_by_name (dynobj, ".dynbss");
2406 BFD_ASSERT (s != NULL);
2407
2408 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2409 copy the initial value out of the dynamic object and into the
2410 runtime process image. We need to remember the offset into the
2411 .rela.bss section we are going to use. */
2412 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2413 {
2414 asection *srel;
2415
2416 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
2417 BFD_ASSERT (srel != NULL);
2418 srel->size += sizeof (Elf32_External_Rela);
2419 h->needs_copy = 1;
2420 }
2421
2422 /* Historic precedent: m68k and i386 allow max 8-byte alignment for the
2423 thing to copy; so do we. */
2424
2425 /* We need to figure out the alignment required for this symbol. I
2426 have no idea how ELF linkers handle this. */
2427 power_of_two = bfd_log2 (h->size);
2428 if (power_of_two > 3)
2429 power_of_two = 3;
2430
2431 /* Apply the required alignment. */
2432 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
2433 if (power_of_two > bfd_get_section_alignment (dynobj, s))
2434 {
2435 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
2436 return FALSE;
2437 }
2438
2439 /* Define the symbol as being at this point in the section. */
2440 h->root.u.def.section = s;
2441 h->root.u.def.value = s->size;
2442
2443 /* Increment the section size to make room for the symbol. */
2444 s->size += h->size;
2445
2446 return TRUE;
2447 }
2448
2449 /* Look through the relocs for a section during the first phase. */
2450
2451 static bfd_boolean
2452 cris_elf_check_relocs (abfd, info, sec, relocs)
2453 bfd *abfd;
2454 struct bfd_link_info *info;
2455 asection *sec;
2456 const Elf_Internal_Rela *relocs;
2457 {
2458 bfd *dynobj;
2459 Elf_Internal_Shdr *symtab_hdr;
2460 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
2461 bfd_signed_vma *local_got_refcounts;
2462 const Elf_Internal_Rela *rel;
2463 const Elf_Internal_Rela *rel_end;
2464 asection *sgot;
2465 asection *srelgot;
2466 asection *sreloc;
2467
2468 if (info->relocatable)
2469 return TRUE;
2470
2471 dynobj = elf_hash_table (info)->dynobj;
2472 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2473 sym_hashes = elf_sym_hashes (abfd);
2474 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
2475 local_got_refcounts = elf_local_got_refcounts (abfd);
2476
2477 sgot = NULL;
2478 srelgot = NULL;
2479 sreloc = NULL;
2480
2481 if (!elf_bad_symtab (abfd))
2482 sym_hashes_end -= symtab_hdr->sh_info;
2483
2484 rel_end = relocs + sec->reloc_count;
2485 for (rel = relocs; rel < rel_end; rel++)
2486 {
2487 struct elf_link_hash_entry *h;
2488 unsigned long r_symndx;
2489 enum elf_cris_reloc_type r_type;
2490
2491 r_symndx = ELF32_R_SYM (rel->r_info);
2492 if (r_symndx < symtab_hdr->sh_info)
2493 h = NULL;
2494 else
2495 {
2496 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2497 while (h->root.type == bfd_link_hash_indirect
2498 || h->root.type == bfd_link_hash_warning)
2499 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2500 }
2501
2502 r_type = ELF32_R_TYPE (rel->r_info);
2503
2504 /* Some relocs require linker-created sections; we need to hang them
2505 on the first input bfd we found that contained dynamic relocs. */
2506 switch (r_type)
2507 {
2508 case R_CRIS_16_GOT:
2509 case R_CRIS_32_GOT:
2510 case R_CRIS_32_GOTREL:
2511 case R_CRIS_32_PLT_GOTREL:
2512 case R_CRIS_32_PLT_PCREL:
2513 case R_CRIS_16_GOTPLT:
2514 case R_CRIS_32_GOTPLT:
2515 if (dynobj == NULL)
2516 {
2517 elf_hash_table (info)->dynobj = dynobj = abfd;
2518
2519 /* We could handle this if we can get a handle on the
2520 output bfd in elf_cris_adjust_dynamic_symbol. Failing
2521 that, we must insist on dynobj being a specific mach. */
2522 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
2523 {
2524 (*_bfd_error_handler)
2525 (_("%B, section %A:\n v10/v32 compatible object %s"
2526 " must not contain a PIC relocation"),
2527 abfd, sec);
2528 return FALSE;
2529 }
2530
2531 /* Create the .got section, so we can assume it's always
2532 present whenever there's a dynobj. */
2533 if (!_bfd_elf_create_got_section (dynobj, info))
2534 return FALSE;
2535 }
2536 break;
2537
2538 default:
2539 break;
2540 }
2541
2542 /* Some relocs require a global offset table (but perhaps not a
2543 specific GOT entry). */
2544 switch (r_type)
2545 {
2546 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
2547 entry only for local symbols. Unfortunately, we don't know
2548 until later on if there's a version script that forces the
2549 symbol local. We must have the .rela.got section in place
2550 before we know if the symbol looks global now, so we need
2551 to treat the reloc just like for R_CRIS_16_GOT and
2552 R_CRIS_32_GOT. */
2553 case R_CRIS_16_GOTPLT:
2554 case R_CRIS_32_GOTPLT:
2555 case R_CRIS_16_GOT:
2556 case R_CRIS_32_GOT:
2557 if (srelgot == NULL
2558 && (h != NULL || info->shared))
2559 {
2560 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2561 if (srelgot == NULL)
2562 {
2563 srelgot = bfd_make_section_with_flags (dynobj,
2564 ".rela.got",
2565 (SEC_ALLOC
2566 | SEC_LOAD
2567 | SEC_HAS_CONTENTS
2568 | SEC_IN_MEMORY
2569 | SEC_LINKER_CREATED
2570 | SEC_READONLY));
2571 if (srelgot == NULL
2572 || !bfd_set_section_alignment (dynobj, srelgot, 2))
2573 return FALSE;
2574 }
2575 }
2576 /* Fall through. */
2577
2578 case R_CRIS_32_GOTREL:
2579 case R_CRIS_32_PLT_GOTREL:
2580 if (sgot == NULL)
2581 sgot = bfd_get_section_by_name (dynobj, ".got");
2582
2583 if (local_got_refcounts == NULL)
2584 {
2585 bfd_size_type amt;
2586
2587 /* We use index local_got_refcounts[-1] to count all
2588 GOT-relative relocations that do not have explicit
2589 GOT entries. */
2590 amt = symtab_hdr->sh_info + 1;
2591 amt *= sizeof (bfd_signed_vma);
2592 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
2593 if (local_got_refcounts == NULL)
2594 return FALSE;
2595
2596 local_got_refcounts++;
2597 elf_local_got_refcounts (abfd) = local_got_refcounts;
2598 }
2599 break;
2600
2601 default:
2602 break;
2603 }
2604
2605 switch (r_type)
2606 {
2607 case R_CRIS_16_GOTPLT:
2608 case R_CRIS_32_GOTPLT:
2609 /* Mark that we need a GOT entry if the PLT entry (and its GOT
2610 entry) is eliminated. We can only do this for a non-local
2611 symbol. */
2612 if (h != NULL)
2613 {
2614 ((struct elf_cris_link_hash_entry *) h)->gotplt_refcount++;
2615 goto handle_gotplt_reloc;
2616 }
2617 /* If h is NULL then this is a local symbol, and we must make a
2618 GOT entry for it, so handle it like a GOT reloc. */
2619 /* Fall through. */
2620
2621 case R_CRIS_16_GOT:
2622 case R_CRIS_32_GOT:
2623 /* This symbol requires a global offset table entry. */
2624 if (h != NULL)
2625 {
2626 if (h->got.refcount == 0)
2627 {
2628 /* Make sure this symbol is output as a dynamic symbol. */
2629 if (h->dynindx == -1)
2630 {
2631 if (!bfd_elf_link_record_dynamic_symbol (info, h))
2632 return FALSE;
2633 }
2634
2635 /* Allocate space in the .got section. */
2636 sgot->size += 4;
2637 /* Allocate relocation space. */
2638 srelgot->size += sizeof (Elf32_External_Rela);
2639 }
2640 h->got.refcount++;
2641 }
2642 else
2643 {
2644 /* This is a global offset table entry for a local symbol. */
2645 if (local_got_refcounts[r_symndx] == 0)
2646 {
2647 sgot->size += 4;
2648 if (info->shared)
2649 {
2650 /* If we are generating a shared object, we need to
2651 output a R_CRIS_RELATIVE reloc so that the dynamic
2652 linker can adjust this GOT entry. */
2653 srelgot->size += sizeof (Elf32_External_Rela);
2654 }
2655 }
2656 local_got_refcounts[r_symndx]++;
2657 }
2658 break;
2659
2660 case R_CRIS_32_GOTREL:
2661 /* This reference requires a global offset table.
2662 FIXME: The actual refcount isn't used currently; the .got
2663 section can't be removed if there were any references in the
2664 input. */
2665 local_got_refcounts[-1]++;
2666 break;
2667
2668 handle_gotplt_reloc:
2669
2670 case R_CRIS_32_PLT_GOTREL:
2671 /* This reference requires a global offset table. */
2672 local_got_refcounts[-1]++;
2673 /* Fall through. */
2674
2675 case R_CRIS_32_PLT_PCREL:
2676 /* This symbol requires a procedure linkage table entry. We
2677 actually build the entry in adjust_dynamic_symbol,
2678 because this might be a case of linking PIC code which is
2679 never referenced by a dynamic object, in which case we
2680 don't need to generate a procedure linkage table entry
2681 after all. */
2682
2683 /* Beware: if we'd check for visibility of the symbol here
2684 (and not marking the need for a PLT when non-visible), we'd
2685 get into trouble with keeping handling consistent with
2686 regards to relocs found before definition and GOTPLT
2687 handling. Eliminable PLT entries will be dealt with later
2688 anyway. */
2689 if (h == NULL)
2690 continue;
2691
2692 h->needs_plt = 1;
2693 h->plt.refcount++;
2694 break;
2695
2696 case R_CRIS_8:
2697 case R_CRIS_16:
2698 case R_CRIS_32:
2699 /* Let's help debug shared library creation. Any of these
2700 relocs can be used in shared libs, but pages containing them
2701 cannot be shared. Don't warn for sections we don't care
2702 about, such as debug sections or non-constant sections. We
2703 can't help tables of (global) function pointers, for example,
2704 though they must be emitted in a data section to avoid having
2705 impure text sections. */
2706 if (info->shared
2707 && (sec->flags & SEC_ALLOC) != 0
2708 && (sec->flags & SEC_READONLY) != 0)
2709 {
2710 /* FIXME: How do we make this optionally a warning only? */
2711 (*_bfd_error_handler)
2712 (_("%B, section %A:\n relocation %s should not"
2713 " be used in a shared object; recompile with -fPIC"),
2714 abfd,
2715 sec,
2716 cris_elf_howto_table[r_type].name);
2717 }
2718 /* Fall through. */
2719
2720 case R_CRIS_8_PCREL:
2721 case R_CRIS_16_PCREL:
2722 case R_CRIS_32_PCREL:
2723 if (h != NULL)
2724 {
2725 h->non_got_ref = 1;
2726
2727 /* Make sure a plt entry is created for this symbol if it
2728 turns out to be a function defined by a dynamic object. */
2729 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2730 h->plt.refcount++;
2731 }
2732
2733 /* If we are creating a shared library and this is not a local
2734 symbol, we need to copy the reloc into the shared library.
2735 However when linking with -Bsymbolic and this is a global
2736 symbol which is defined in an object we are including in the
2737 link (i.e., DEF_REGULAR is set), then we can resolve the
2738 reloc directly. At this point we have not seen all the input
2739 files, so it is possible that DEF_REGULAR is not set now but
2740 will be set later (it is never cleared). In case of a weak
2741 definition, DEF_REGULAR may be cleared later by a strong
2742 definition in a shared library. We account for that
2743 possibility below by storing information in the relocs_copied
2744 field of the hash table entry. A similar situation occurs
2745 when creating shared libraries and symbol visibility changes
2746 render the symbol local. */
2747
2748 /* No need to do anything if we're not creating a shared object. */
2749 if (! info->shared)
2750 break;
2751
2752 /* We don't need to handle relocs into sections not going into
2753 the "real" output. */
2754 if ((sec->flags & SEC_ALLOC) == 0)
2755 break;
2756
2757 /* We can only eliminate PC-relative relocs. */
2758 if (r_type == R_CRIS_8_PCREL
2759 || r_type == R_CRIS_16_PCREL
2760 || r_type == R_CRIS_32_PCREL)
2761 {
2762 /* If the symbol is local, then we can eliminate the reloc. */
2763 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2764 break;
2765
2766 /* If this is with -Bsymbolic and the symbol isn't weak, and
2767 is defined by an ordinary object (the ones we include in
2768 this shared library) then we can also eliminate the
2769 reloc. See comment above for more eliminable cases which
2770 we can't identify at this time. */
2771 if (info->symbolic
2772 && h->root.type != bfd_link_hash_defweak
2773 && h->def_regular)
2774 break;
2775
2776 if ((sec->flags & SEC_READONLY) != 0)
2777 {
2778 /* FIXME: How do we make this optionally a warning only? */
2779 (*_bfd_error_handler)
2780 (_("%B, section %A:\n relocation %s should not be used"
2781 " in a shared object; recompile with -fPIC"),
2782 abfd,
2783 sec,
2784 cris_elf_howto_table[r_type].name);
2785 }
2786 }
2787
2788 /* We create a reloc section in dynobj and make room for this
2789 reloc. */
2790 if (sreloc == NULL)
2791 {
2792 const char *name;
2793
2794 name = (bfd_elf_string_from_elf_section
2795 (abfd,
2796 elf_elfheader (abfd)->e_shstrndx,
2797 elf_section_data (sec)->rel_hdr.sh_name));
2798 if (name == NULL)
2799 return FALSE;
2800
2801 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
2802 && strcmp (bfd_get_section_name (abfd, sec),
2803 name + 5) == 0);
2804
2805 sreloc = bfd_get_section_by_name (dynobj, name);
2806 if (sreloc == NULL)
2807 {
2808 sreloc = bfd_make_section_with_flags (dynobj, name,
2809 (SEC_ALLOC
2810 | SEC_LOAD
2811 | SEC_HAS_CONTENTS
2812 | SEC_IN_MEMORY
2813 | SEC_LINKER_CREATED
2814 | SEC_READONLY));
2815 if (sreloc == NULL
2816 || !bfd_set_section_alignment (dynobj, sreloc, 2))
2817 return FALSE;
2818 }
2819 if (sec->flags & SEC_READONLY)
2820 info->flags |= DF_TEXTREL;
2821 }
2822
2823 sreloc->size += sizeof (Elf32_External_Rela);
2824
2825 /* If we are linking with -Bsymbolic, we count the number of PC
2826 relative relocations we have entered for this symbol, so that
2827 we can discard them again if the symbol is later defined by a
2828 regular object. We know that h is really a pointer to an
2829 elf_cris_link_hash_entry. */
2830 if ((r_type == R_CRIS_8_PCREL
2831 || r_type == R_CRIS_16_PCREL
2832 || r_type == R_CRIS_32_PCREL)
2833 && info->symbolic)
2834 {
2835 struct elf_cris_link_hash_entry *eh;
2836 struct elf_cris_pcrel_relocs_copied *p;
2837
2838 eh = (struct elf_cris_link_hash_entry *) h;
2839
2840 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2841 if (p->section == sreloc)
2842 break;
2843
2844 if (p == NULL)
2845 {
2846 p = ((struct elf_cris_pcrel_relocs_copied *)
2847 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
2848 if (p == NULL)
2849 return FALSE;
2850 p->next = eh->pcrel_relocs_copied;
2851 eh->pcrel_relocs_copied = p;
2852 p->section = sreloc;
2853 p->count = 0;
2854 }
2855
2856 ++p->count;
2857 }
2858 break;
2859
2860 /* This relocation describes the C++ object vtable hierarchy.
2861 Reconstruct it for later use during GC. */
2862 case R_CRIS_GNU_VTINHERIT:
2863 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2864 return FALSE;
2865 break;
2866
2867 /* This relocation describes which C++ vtable entries are actually
2868 used. Record for later use during GC. */
2869 case R_CRIS_GNU_VTENTRY:
2870 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2871 return FALSE;
2872 break;
2873
2874 default:
2875 /* Other relocs do not appear here. */
2876 bfd_set_error (bfd_error_bad_value);
2877 return FALSE;
2878 }
2879 }
2880
2881 return TRUE;
2882 }
2883
2884 /* Set the sizes of the dynamic sections. */
2885
2886 static bfd_boolean
2887 elf_cris_size_dynamic_sections (output_bfd, info)
2888 bfd *output_bfd ATTRIBUTE_UNUSED;
2889 struct bfd_link_info *info;
2890 {
2891 bfd *dynobj;
2892 asection *s;
2893 bfd_boolean plt;
2894 bfd_boolean relocs;
2895
2896 dynobj = elf_hash_table (info)->dynobj;
2897 BFD_ASSERT (dynobj != NULL);
2898
2899 if (elf_hash_table (info)->dynamic_sections_created)
2900 {
2901 /* Set the contents of the .interp section to the interpreter. */
2902 if (info->executable)
2903 {
2904 s = bfd_get_section_by_name (dynobj, ".interp");
2905 BFD_ASSERT (s != NULL);
2906 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2907 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2908 }
2909 }
2910 else
2911 {
2912 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
2913 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2914 elf_cris_adjust_gotplt_to_got,
2915 (PTR) info);
2916
2917 /* We may have created entries in the .rela.got section.
2918 However, if we are not creating the dynamic sections, we will
2919 not actually use these entries. Reset the size of .rela.got,
2920 which will cause it to get stripped from the output file
2921 below. */
2922 s = bfd_get_section_by_name (dynobj, ".rela.got");
2923 if (s != NULL)
2924 s->size = 0;
2925 }
2926
2927 /* If this is a -Bsymbolic shared link, then we need to discard all PC
2928 relative relocs against symbols defined in a regular object. We
2929 allocated space for them in the check_relocs routine, but we will not
2930 fill them in in the relocate_section routine. We also discard space
2931 for relocs that have become for local symbols due to symbol
2932 visibility changes. For programs, we discard space for relocs for
2933 symbols not referenced by any dynamic object. */
2934 if (info->shared)
2935 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2936 elf_cris_discard_excess_dso_dynamics,
2937 (PTR) info);
2938 else
2939 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2940 elf_cris_discard_excess_program_dynamics,
2941 (PTR) info);
2942
2943 /* The check_relocs and adjust_dynamic_symbol entry points have
2944 determined the sizes of the various dynamic sections. Allocate
2945 memory for them. */
2946 plt = FALSE;
2947 relocs = FALSE;
2948 for (s = dynobj->sections; s != NULL; s = s->next)
2949 {
2950 const char *name;
2951
2952 if ((s->flags & SEC_LINKER_CREATED) == 0)
2953 continue;
2954
2955 /* It's OK to base decisions on the section name, because none
2956 of the dynobj section names depend upon the input files. */
2957 name = bfd_get_section_name (dynobj, s);
2958
2959 if (strcmp (name, ".plt") == 0)
2960 {
2961 /* Remember whether there is a PLT. */
2962 plt = s->size != 0;
2963 }
2964 else if (strncmp (name, ".rela", 5) == 0)
2965 {
2966 if (s->size != 0)
2967 {
2968 /* Remember whether there are any reloc sections other
2969 than .rela.plt. */
2970 if (strcmp (name, ".rela.plt") != 0)
2971 relocs = TRUE;
2972
2973 /* We use the reloc_count field as a counter if we need
2974 to copy relocs into the output file. */
2975 s->reloc_count = 0;
2976 }
2977 }
2978 else if (strncmp (name, ".got", 4) != 0
2979 && strcmp (name, ".dynbss") != 0)
2980 {
2981 /* It's not one of our sections, so don't allocate space. */
2982 continue;
2983 }
2984
2985 if (s->size == 0)
2986 {
2987 /* If we don't need this section, strip it from the
2988 output file. This is mostly to handle .rela.bss and
2989 .rela.plt. We must create both sections in
2990 create_dynamic_sections, because they must be created
2991 before the linker maps input sections to output
2992 sections. The linker does that before
2993 adjust_dynamic_symbol is called, and it is that
2994 function which decides whether anything needs to go
2995 into these sections. */
2996 s->flags |= SEC_EXCLUDE;
2997 continue;
2998 }
2999
3000 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3001 continue;
3002
3003 /* Allocate memory for the section contents. We use bfd_zalloc here
3004 in case unused entries are not reclaimed before the section's
3005 contents are written out. This should not happen, but this way
3006 if it does, we will not write out garbage. For reloc sections,
3007 this will make entries have the type R_CRIS_NONE. */
3008 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3009 if (s->contents == NULL)
3010 return FALSE;
3011 }
3012
3013 if (elf_hash_table (info)->dynamic_sections_created)
3014 {
3015 /* Add some entries to the .dynamic section. We fill in the
3016 values later, in elf_cris_finish_dynamic_sections, but we
3017 must add the entries now so that we get the correct size for
3018 the .dynamic section. The DT_DEBUG entry is filled in by the
3019 dynamic linker and used by the debugger. */
3020 #define add_dynamic_entry(TAG, VAL) \
3021 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3022
3023 if (!info->shared)
3024 {
3025 if (!add_dynamic_entry (DT_DEBUG, 0))
3026 return FALSE;
3027 }
3028
3029 if (plt)
3030 {
3031 if (!add_dynamic_entry (DT_PLTGOT, 0)
3032 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3033 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3034 || !add_dynamic_entry (DT_JMPREL, 0))
3035 return FALSE;
3036 }
3037
3038 if (relocs)
3039 {
3040 if (!add_dynamic_entry (DT_RELA, 0)
3041 || !add_dynamic_entry (DT_RELASZ, 0)
3042 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3043 return FALSE;
3044 }
3045
3046 if ((info->flags & DF_TEXTREL) != 0)
3047 {
3048 if (!add_dynamic_entry (DT_TEXTREL, 0))
3049 return FALSE;
3050 info->flags |= DF_TEXTREL;
3051 }
3052 }
3053 #undef add_dynamic_entry
3054
3055 return TRUE;
3056 }
3057
3058 /* This function is called via elf_cris_link_hash_traverse if we are
3059 creating a shared object. In the -Bsymbolic case, it discards the
3060 space allocated to copy PC relative relocs against symbols which
3061 are defined in regular objects. For the normal non-symbolic case,
3062 we also discard space for relocs that have become local due to
3063 symbol visibility changes. We allocated space for them in the
3064 check_relocs routine, but we won't fill them in in the
3065 relocate_section routine. */
3066
3067 static bfd_boolean
3068 elf_cris_discard_excess_dso_dynamics (h, inf)
3069 struct elf_cris_link_hash_entry *h;
3070 PTR inf;
3071 {
3072 struct elf_cris_pcrel_relocs_copied *s;
3073 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3074
3075 if (h->root.root.type == bfd_link_hash_warning)
3076 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3077
3078 /* If a symbol has been forced local or we have found a regular
3079 definition for the symbolic link case, then we won't be needing
3080 any relocs. */
3081 if (h->root.def_regular
3082 && (h->root.forced_local
3083 || info->symbolic))
3084 {
3085 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3086 s->section->size -= s->count * sizeof (Elf32_External_Rela);
3087 }
3088
3089 return TRUE;
3090 }
3091
3092 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3093 creating a shared object. We discard space for relocs for symbols put
3094 in the .got, but which we found we do not have to resolve at run-time. */
3095
3096 static bfd_boolean
3097 elf_cris_discard_excess_program_dynamics (h, inf)
3098 struct elf_cris_link_hash_entry *h;
3099 PTR inf;
3100 {
3101 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3102
3103 if (h->root.root.type == bfd_link_hash_warning)
3104 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3105
3106 /* If we're not creating a shared library and have a symbol which is
3107 referred to by .got references, but the symbol is defined locally,
3108 (or rather, not defined by a DSO) then lose the reloc for the .got
3109 (don't allocate room for it). Likewise for relocs for something
3110 for which we create a PLT. */
3111 if (!h->root.def_dynamic
3112 || h->root.plt.refcount > 0)
3113 {
3114 if (h->root.got.refcount > 0
3115 /* The size of this section is only valid and in sync with the
3116 various reference counts if we do dynamic; don't decrement it
3117 otherwise. */
3118 && elf_hash_table (info)->dynamic_sections_created)
3119 {
3120 bfd *dynobj = elf_hash_table (info)->dynobj;
3121 asection *srelgot;
3122
3123 BFD_ASSERT (dynobj != NULL);
3124
3125 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3126
3127 BFD_ASSERT (srelgot != NULL);
3128
3129 srelgot->size -= sizeof (Elf32_External_Rela);
3130 }
3131
3132 /* If the locally-defined symbol isn't used by a DSO, then we don't
3133 have to export it as a dynamic symbol. This was already done for
3134 functions; doing this for all symbols would presumably not
3135 introduce new problems. Of course we don't do this if we're
3136 exporting all dynamic symbols. */
3137 if (! info->export_dynamic
3138 && h->root.dynindx != -1
3139 && !h->root.def_dynamic
3140 && !h->root.ref_dynamic)
3141 {
3142 h->root.dynindx = -1;
3143 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3144 h->root.dynstr_index);
3145 }
3146 }
3147
3148 return TRUE;
3149 }
3150
3151 /* Reject a file depending on presence and expectation of prefixed
3152 underscores on symbols. */
3153
3154 static bfd_boolean
3155 cris_elf_object_p (abfd)
3156 bfd *abfd;
3157 {
3158 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
3159 return FALSE;
3160
3161 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
3162 return (bfd_get_symbol_leading_char (abfd) == '_');
3163 else
3164 return (bfd_get_symbol_leading_char (abfd) == 0);
3165 }
3166
3167 /* Mark presence or absence of leading underscore. Set machine type
3168 flags from mach type. */
3169
3170 static void
3171 cris_elf_final_write_processing (abfd, linker)
3172 bfd *abfd;
3173 bfd_boolean linker ATTRIBUTE_UNUSED;
3174 {
3175 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
3176
3177 e_flags &= ~EF_CRIS_UNDERSCORE;
3178 if (bfd_get_symbol_leading_char (abfd) == '_')
3179 e_flags |= EF_CRIS_UNDERSCORE;
3180
3181 switch (bfd_get_mach (abfd))
3182 {
3183 case bfd_mach_cris_v0_v10:
3184 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
3185 break;
3186
3187 case bfd_mach_cris_v10_v32:
3188 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
3189 break;
3190
3191 case bfd_mach_cris_v32:
3192 e_flags |= EF_CRIS_VARIANT_V32;
3193 break;
3194
3195 default:
3196 _bfd_abort (__FILE__, __LINE__,
3197 _("Unexpected machine number"));
3198 }
3199
3200 elf_elfheader (abfd)->e_flags = e_flags;
3201 }
3202
3203 /* Set the mach type from e_flags value. */
3204
3205 static bfd_boolean
3206 cris_elf_set_mach_from_flags (abfd, flags)
3207 bfd *abfd;
3208 unsigned long flags;
3209 {
3210 switch (flags & EF_CRIS_VARIANT_MASK)
3211 {
3212 case EF_CRIS_VARIANT_ANY_V0_V10:
3213 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
3214 break;
3215
3216 case EF_CRIS_VARIANT_V32:
3217 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
3218 break;
3219
3220 case EF_CRIS_VARIANT_COMMON_V10_V32:
3221 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
3222 break;
3223
3224 default:
3225 /* Since we don't recognize them, we obviously can't support them
3226 with this code; we'd have to require that all future handling
3227 would be optional. */
3228 bfd_set_error (bfd_error_wrong_format);
3229 return FALSE;
3230 }
3231
3232 return TRUE;
3233 }
3234
3235 /* Display the flags field. */
3236
3237 static bfd_boolean
3238 cris_elf_print_private_bfd_data (abfd, ptr)
3239 bfd *abfd;
3240 PTR ptr;
3241 {
3242 FILE *file = (FILE *) ptr;
3243
3244 BFD_ASSERT (abfd != NULL && ptr != NULL);
3245
3246 _bfd_elf_print_private_bfd_data (abfd, ptr);
3247
3248 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3249
3250 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
3251 fprintf (file, _(" [symbols have a _ prefix]"));
3252 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3253 == EF_CRIS_VARIANT_COMMON_V10_V32)
3254 fprintf (file, _(" [v10 and v32]"));
3255 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3256 == EF_CRIS_VARIANT_V32)
3257 fprintf (file, _(" [v32]"));
3258
3259 fputc ('\n', file);
3260 return TRUE;
3261 }
3262
3263 /* Don't mix files with and without a leading underscore. */
3264
3265 static bfd_boolean
3266 cris_elf_merge_private_bfd_data (ibfd, obfd)
3267 bfd *ibfd;
3268 bfd *obfd;
3269 {
3270 int imach, omach;
3271
3272 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3273 return FALSE;
3274
3275 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3276 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3277 return TRUE;
3278
3279 imach = bfd_get_mach (ibfd);
3280
3281 if (! elf_flags_init (obfd))
3282 {
3283 /* This happens when ld starts out with a 'blank' output file. */
3284 elf_flags_init (obfd) = TRUE;
3285
3286 /* We ignore the linker-set mach, and instead set it according to
3287 the first input file. This would also happen if we could
3288 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
3289 This allows us to keep the same linker config across
3290 cris(v0..v10) and crisv32. The drawback is that we can't force
3291 the output type, which might be a sane thing to do for a
3292 v10+v32 compatibility object. */
3293 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3294 return FALSE;
3295 }
3296
3297 if (bfd_get_symbol_leading_char (ibfd)
3298 != bfd_get_symbol_leading_char (obfd))
3299 {
3300 (*_bfd_error_handler)
3301 (bfd_get_symbol_leading_char (ibfd) == '_'
3302 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
3303 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
3304 ibfd);
3305 bfd_set_error (bfd_error_bad_value);
3306 return FALSE;
3307 }
3308
3309 omach = bfd_get_mach (obfd);
3310
3311 if (imach != omach)
3312 {
3313 /* We can get an incompatible combination only if either is
3314 bfd_mach_cris_v32, and the other one isn't compatible. */
3315 if ((imach == bfd_mach_cris_v32
3316 && omach != bfd_mach_cris_v10_v32)
3317 || (omach == bfd_mach_cris_v32
3318 && imach != bfd_mach_cris_v10_v32))
3319 {
3320 (*_bfd_error_handler)
3321 ((imach == bfd_mach_cris_v32)
3322 ? _("%B contains CRIS v32 code, incompatible"
3323 " with previous objects")
3324 : _("%B contains non-CRIS-v32 code, incompatible"
3325 " with previous objects"),
3326 ibfd);
3327 bfd_set_error (bfd_error_bad_value);
3328 return FALSE;
3329 }
3330
3331 /* We don't have to check the case where the input is compatible
3332 with v10 and v32, because the output is already known to be set
3333 to the other (compatible) mach. */
3334 if (omach == bfd_mach_cris_v10_v32
3335 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3336 return FALSE;
3337 }
3338
3339 return TRUE;
3340 }
3341
3342 /* Do side-effects of e_flags copying to obfd. */
3343
3344 static bfd_boolean
3345 cris_elf_copy_private_bfd_data (ibfd, obfd)
3346 bfd *ibfd;
3347 bfd *obfd;
3348 {
3349 /* Call the base function. */
3350 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
3351 return FALSE;
3352
3353 /* If output is big-endian for some obscure reason, stop here. */
3354 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
3355 return FALSE;
3356
3357 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3358 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3359 return TRUE;
3360
3361 /* Do what we really came here for. */
3362 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
3363 }
3364
3365 static enum elf_reloc_type_class
3366 elf_cris_reloc_type_class (rela)
3367 const Elf_Internal_Rela *rela;
3368 {
3369 switch ((int) ELF32_R_TYPE (rela->r_info))
3370 {
3371 case R_CRIS_RELATIVE:
3372 return reloc_class_relative;
3373 case R_CRIS_JUMP_SLOT:
3374 return reloc_class_plt;
3375 case R_CRIS_COPY:
3376 return reloc_class_copy;
3377 default:
3378 return reloc_class_normal;
3379 }
3380 }
3381 \f
3382 #define ELF_ARCH bfd_arch_cris
3383 #define ELF_MACHINE_CODE EM_CRIS
3384 #define ELF_MAXPAGESIZE 0x2000
3385
3386 #define TARGET_LITTLE_SYM bfd_elf32_cris_vec
3387 #define TARGET_LITTLE_NAME "elf32-cris"
3388 #define elf_symbol_leading_char 0
3389
3390 #define elf_info_to_howto_rel NULL
3391 #define elf_info_to_howto cris_info_to_howto_rela
3392 #define elf_backend_relocate_section cris_elf_relocate_section
3393 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
3394 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook
3395 #define elf_backend_check_relocs cris_elf_check_relocs
3396 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
3397 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
3398
3399 #define elf_backend_can_gc_sections 1
3400 #define elf_backend_can_refcount 1
3401
3402 #define elf_backend_object_p cris_elf_object_p
3403 #define elf_backend_final_write_processing \
3404 cris_elf_final_write_processing
3405 #define bfd_elf32_bfd_print_private_bfd_data \
3406 cris_elf_print_private_bfd_data
3407 #define bfd_elf32_bfd_merge_private_bfd_data \
3408 cris_elf_merge_private_bfd_data
3409 #define bfd_elf32_bfd_copy_private_bfd_data \
3410 cris_elf_copy_private_bfd_data
3411
3412 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
3413
3414 #define bfd_elf32_bfd_link_hash_table_create \
3415 elf_cris_link_hash_table_create
3416 #define elf_backend_adjust_dynamic_symbol \
3417 elf_cris_adjust_dynamic_symbol
3418 #define elf_backend_size_dynamic_sections \
3419 elf_cris_size_dynamic_sections
3420 #define elf_backend_finish_dynamic_symbol \
3421 elf_cris_finish_dynamic_symbol
3422 #define elf_backend_finish_dynamic_sections \
3423 elf_cris_finish_dynamic_sections
3424 #define elf_backend_create_dynamic_sections \
3425 _bfd_elf_create_dynamic_sections
3426 #define bfd_elf32_bfd_final_link \
3427 bfd_elf_gc_common_final_link
3428 #define elf_backend_hide_symbol elf_cris_hide_symbol
3429 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
3430
3431 #define elf_backend_want_got_plt 1
3432 #define elf_backend_plt_readonly 1
3433 #define elf_backend_want_plt_sym 0
3434 #define elf_backend_got_header_size 12
3435
3436 /* Later, we my want to optimize RELA entries into REL entries for dynamic
3437 linking and libraries (if it's a win of any significance). Until then,
3438 take the easy route. */
3439 #define elf_backend_may_use_rel_p 0
3440 #define elf_backend_may_use_rela_p 1
3441 #define elf_backend_rela_normal 1
3442
3443 #include "elf32-target.h"
3444
3445 #define INCLUDED_TARGET_FILE
3446
3447 #undef TARGET_LITTLE_SYM
3448 #undef TARGET_LITTLE_NAME
3449 #undef elf_symbol_leading_char
3450
3451 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
3452 #define TARGET_LITTLE_NAME "elf32-us-cris"
3453 #define elf_symbol_leading_char '_'
3454
3455 #include "elf32-target.h"
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