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bfd/ChangeLog:
[binutils.git] / bfd / elf32-cris.c
blob75d069507013a985830819af2f991ce327437e20
1 /* CRIS-specific support for 32-bit ELF.
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Contributed by Axis Communications AB.
5 Written by Hans-Peter Nilsson, based on elf32-fr30.c
6 PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 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,
23 MA 02110-1301, USA. */
24
25 #include "sysdep.h"
26 #include "bfd.h"
27 #include "libbfd.h"
28 #include "elf-bfd.h"
29 #include "elf/cris.h"
30
31 /* Forward declarations. */
32 static reloc_howto_type * cris_reloc_type_lookup
33 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
34
35 static void cris_info_to_howto_rela
36 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
37
38 static bfd_reloc_status_type cris_elf_pcrel_reloc
39 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
40
41 static bfd_boolean cris_elf_grok_prstatus
42 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
43
44 static bfd_boolean cris_elf_grok_psinfo
45 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
46
47 static bfd_boolean cris_elf_relocate_section
48 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
49 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
50
51 static bfd_reloc_status_type cris_final_link_relocate
52 PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
53 Elf_Internal_Rela *, bfd_vma));
54
55 static bfd_boolean cris_elf_object_p PARAMS ((bfd *));
56
57 static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean));
58
59 static bfd_boolean cris_elf_set_mach_from_flags
60 PARAMS ((bfd *, unsigned long int));
61
62 static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
63
64 static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
65 static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
66
67 struct elf_cris_link_hash_entry;
68 static bfd_boolean elf_cris_discard_excess_dso_dynamics
69 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
70 static bfd_boolean elf_cris_discard_excess_program_dynamics
71 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
72 static bfd_boolean elf_cris_adjust_gotplt_to_got
73 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
74 static bfd_boolean elf_cris_try_fold_plt_to_got
75 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
76 static struct bfd_hash_entry *elf_cris_link_hash_newfunc
77 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
78 static struct bfd_link_hash_table *elf_cris_link_hash_table_create
79 PARAMS ((bfd *));
80 static bfd_boolean elf_cris_adjust_dynamic_symbol
81 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
82 static bfd_boolean cris_elf_check_relocs
83 PARAMS ((bfd *, struct bfd_link_info *, asection *,
84 const Elf_Internal_Rela *));
85
86 static bfd_boolean elf_cris_size_dynamic_sections
87 PARAMS ((bfd *, struct bfd_link_info *));
88 static bfd_boolean elf_cris_finish_dynamic_symbol
89 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
90 Elf_Internal_Sym *));
91 static bfd_boolean elf_cris_finish_dynamic_sections
92 PARAMS ((bfd *, struct bfd_link_info *));
93 static void elf_cris_hide_symbol
94 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
95 static enum elf_reloc_type_class elf_cris_reloc_type_class
96 PARAMS ((const Elf_Internal_Rela *));
97
98 static reloc_howto_type cris_elf_howto_table [] =
99 {
100 /* This reloc does nothing. */
101 HOWTO (R_CRIS_NONE, /* type */
102 0, /* rightshift */
103 2, /* size (0 = byte, 1 = short, 2 = long) */
104 32, /* bitsize */
105 FALSE, /* pc_relative */
106 0, /* bitpos */
107 complain_overflow_bitfield, /* complain_on_overflow */
108 bfd_elf_generic_reloc, /* special_function */
109 "R_CRIS_NONE", /* name */
110 FALSE, /* partial_inplace */
111 0, /* src_mask */
112 0, /* dst_mask */
113 FALSE), /* pcrel_offset */
114
115 /* An 8 bit absolute relocation. */
116 HOWTO (R_CRIS_8, /* type */
117 0, /* rightshift */
118 0, /* size (0 = byte, 1 = short, 2 = long) */
119 8, /* bitsize */
120 FALSE, /* pc_relative */
121 0, /* bitpos */
122 complain_overflow_bitfield, /* complain_on_overflow */
123 bfd_elf_generic_reloc, /* special_function */
124 "R_CRIS_8", /* name */
125 FALSE, /* partial_inplace */
126 0x0000, /* src_mask */
127 0x00ff, /* dst_mask */
128 FALSE), /* pcrel_offset */
129
130 /* A 16 bit absolute relocation. */
131 HOWTO (R_CRIS_16, /* type */
132 0, /* rightshift */
133 1, /* size (0 = byte, 1 = short, 2 = long) */
134 16, /* bitsize */
135 FALSE, /* pc_relative */
136 0, /* bitpos */
137 complain_overflow_bitfield, /* complain_on_overflow */
138 bfd_elf_generic_reloc, /* special_function */
139 "R_CRIS_16", /* name */
140 FALSE, /* partial_inplace */
141 0x00000000, /* src_mask */
142 0x0000ffff, /* dst_mask */
143 FALSE), /* pcrel_offset */
144
145 /* A 32 bit absolute relocation. */
146 HOWTO (R_CRIS_32, /* type */
147 0, /* rightshift */
148 2, /* size (0 = byte, 1 = short, 2 = long) */
149 32, /* bitsize */
150 FALSE, /* pc_relative */
151 0, /* bitpos */
152 /* We don't want overflow complaints for 64-bit vma builds
153 for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
154 32-bit ELF) where sym=0xc0001234.
155 Don't do this for the PIC relocs, as we don't expect to
156 see them with large offsets. */
157 complain_overflow_dont, /* complain_on_overflow */
158 bfd_elf_generic_reloc, /* special_function */
159 "R_CRIS_32", /* name */
160 FALSE, /* partial_inplace */
161 0x00000000, /* src_mask */
162 0xffffffff, /* dst_mask */
163 FALSE), /* pcrel_offset */
164
165 /* An 8 bit PC-relative relocation. */
166 HOWTO (R_CRIS_8_PCREL, /* type */
167 0, /* rightshift */
168 0, /* size (0 = byte, 1 = short, 2 = long) */
169 8, /* bitsize */
170 TRUE, /* pc_relative */
171 0, /* bitpos */
172 complain_overflow_bitfield, /* complain_on_overflow */
173 cris_elf_pcrel_reloc, /* special_function */
174 "R_CRIS_8_PCREL", /* name */
175 FALSE, /* partial_inplace */
176 0x0000, /* src_mask */
177 0x00ff, /* dst_mask */
178 TRUE), /* pcrel_offset */
179
180 /* A 16 bit PC-relative relocation. */
181 HOWTO (R_CRIS_16_PCREL, /* type */
182 0, /* rightshift */
183 1, /* size (0 = byte, 1 = short, 2 = long) */
184 16, /* bitsize */
185 TRUE, /* pc_relative */
186 0, /* bitpos */
187 complain_overflow_bitfield, /* complain_on_overflow */
188 cris_elf_pcrel_reloc, /* special_function */
189 "R_CRIS_16_PCREL", /* name */
190 FALSE, /* partial_inplace */
191 0x00000000, /* src_mask */
192 0x0000ffff, /* dst_mask */
193 TRUE), /* pcrel_offset */
194
195 /* A 32 bit PC-relative relocation. */
196 HOWTO (R_CRIS_32_PCREL, /* type */
197 0, /* rightshift */
198 2, /* size (0 = byte, 1 = short, 2 = long) */
199 32, /* bitsize */
200 TRUE, /* pc_relative */
201 0, /* bitpos */
202 complain_overflow_bitfield, /* complain_on_overflow */
203 cris_elf_pcrel_reloc, /* special_function */
204 "R_CRIS_32_PCREL", /* name */
205 FALSE, /* partial_inplace */
206 0x00000000, /* src_mask */
207 0xffffffff, /* dst_mask */
208 TRUE), /* pcrel_offset */
209
210 /* GNU extension to record C++ vtable hierarchy. */
211 HOWTO (R_CRIS_GNU_VTINHERIT, /* type */
212 0, /* rightshift */
213 2, /* size (0 = byte, 1 = short, 2 = long) */
214 0, /* bitsize */
215 FALSE, /* pc_relative */
216 0, /* bitpos */
217 complain_overflow_dont, /* complain_on_overflow */
218 NULL, /* special_function */
219 "R_CRIS_GNU_VTINHERIT", /* name */
220 FALSE, /* partial_inplace */
221 0, /* src_mask */
222 0, /* dst_mask */
223 FALSE), /* pcrel_offset */
224
225 /* GNU extension to record C++ vtable member usage. */
226 HOWTO (R_CRIS_GNU_VTENTRY, /* type */
227 0, /* rightshift */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
229 0, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
234 "R_CRIS_GNU_VTENTRY", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* This is used only by the dynamic linker. The symbol should exist
241 both in the object being run and in some shared library. The
242 dynamic linker copies the data addressed by the symbol from the
243 shared library into the object, because the object being
244 run has to have the data at some particular address. */
245 HOWTO (R_CRIS_COPY, /* type */
246 0, /* rightshift */
247 2, /* size (0 = byte, 1 = short, 2 = long) */
248 32, /* bitsize */
249 FALSE, /* pc_relative */
250 0, /* bitpos */
251 complain_overflow_bitfield, /* complain_on_overflow */
252 bfd_elf_generic_reloc, /* special_function */
253 "R_CRIS_COPY", /* name */
254 FALSE, /* partial_inplace */
255 0, /* src_mask */
256 0, /* dst_mask */
257 FALSE), /* pcrel_offset */
258
259 /* Like R_CRIS_32, but used when setting global offset table entries. */
260 HOWTO (R_CRIS_GLOB_DAT, /* type */
261 0, /* rightshift */
262 2, /* size (0 = byte, 1 = short, 2 = long) */
263 32, /* bitsize */
264 FALSE, /* pc_relative */
265 0, /* bitpos */
266 complain_overflow_bitfield, /* complain_on_overflow */
267 bfd_elf_generic_reloc, /* special_function */
268 "R_CRIS_GLOB_DAT", /* name */
269 FALSE, /* partial_inplace */
270 0, /* src_mask */
271 0xffffffff, /* dst_mask */
272 FALSE), /* pcrel_offset */
273
274 /* Marks a procedure linkage table entry for a symbol. */
275 HOWTO (R_CRIS_JUMP_SLOT, /* type */
276 0, /* rightshift */
277 2, /* size (0 = byte, 1 = short, 2 = long) */
278 32, /* bitsize */
279 FALSE, /* pc_relative */
280 0, /* bitpos */
281 complain_overflow_bitfield, /* complain_on_overflow */
282 bfd_elf_generic_reloc, /* special_function */
283 "R_CRIS_JUMP_SLOT", /* name */
284 FALSE, /* partial_inplace */
285 0, /* src_mask */
286 0, /* dst_mask */
287 FALSE), /* pcrel_offset */
288
289 /* Used only by the dynamic linker. When the object is run, this
290 longword is set to the load address of the object, plus the
291 addend. */
292 HOWTO (R_CRIS_RELATIVE, /* type */
293 0, /* rightshift */
294 2, /* size (0 = byte, 1 = short, 2 = long) */
295 32, /* bitsize */
296 FALSE, /* pc_relative */
297 0, /* bitpos */
298 complain_overflow_bitfield, /* complain_on_overflow */
299 bfd_elf_generic_reloc, /* special_function */
300 "R_CRIS_RELATIVE", /* name */
301 FALSE, /* partial_inplace */
302 0, /* src_mask */
303 0xffffffff, /* dst_mask */
304 FALSE), /* pcrel_offset */
305
306 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
307 HOWTO (R_CRIS_16_GOT, /* type */
308 0, /* rightshift */
309 1, /* size (0 = byte, 1 = short, 2 = long) */
310 16, /* bitsize */
311 FALSE, /* pc_relative */
312 0, /* bitpos */
313 complain_overflow_bitfield, /* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_CRIS_16_GOT", /* name */
316 FALSE, /* partial_inplace */
317 0, /* src_mask */
318 0xffff, /* dst_mask */
319 FALSE), /* pcrel_offset */
320
321 HOWTO (R_CRIS_32_GOT, /* type */
322 0, /* rightshift */
323 2, /* size (0 = byte, 1 = short, 2 = long) */
324 32, /* bitsize */
325 FALSE, /* pc_relative */
326 0, /* bitpos */
327 complain_overflow_bitfield, /* complain_on_overflow */
328 bfd_elf_generic_reloc, /* special_function */
329 "R_CRIS_32_GOT", /* name */
330 FALSE, /* partial_inplace */
331 0, /* src_mask */
332 0xffffffff, /* dst_mask */
333 FALSE), /* pcrel_offset */
334
335 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
336 the GOT table for the symbol. */
337 HOWTO (R_CRIS_16_GOTPLT, /* type */
338 0, /* rightshift */
339 1, /* size (0 = byte, 1 = short, 2 = long) */
340 16, /* bitsize */
341 FALSE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_bitfield, /* complain_on_overflow */
344 bfd_elf_generic_reloc, /* special_function */
345 "R_CRIS_16_GOTPLT", /* name */
346 FALSE, /* partial_inplace */
347 0, /* src_mask */
348 0xffff, /* dst_mask */
349 FALSE), /* pcrel_offset */
350
351 HOWTO (R_CRIS_32_GOTPLT, /* type */
352 0, /* rightshift */
353 2, /* size (0 = byte, 1 = short, 2 = long) */
354 32, /* bitsize */
355 FALSE, /* pc_relative */
356 0, /* bitpos */
357 complain_overflow_bitfield, /* complain_on_overflow */
358 bfd_elf_generic_reloc, /* special_function */
359 "R_CRIS_32_GOTPLT", /* name */
360 FALSE, /* partial_inplace */
361 0, /* src_mask */
362 0xffffffff, /* dst_mask */
363 FALSE), /* pcrel_offset */
364
365 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
366 be necessary. */
367 HOWTO (R_CRIS_32_GOTREL, /* type */
368 0, /* rightshift */
369 2, /* size (0 = byte, 1 = short, 2 = long) */
370 32, /* bitsize */
371 FALSE, /* pc_relative */
372 0, /* bitpos */
373 complain_overflow_bitfield, /* complain_on_overflow */
374 bfd_elf_generic_reloc, /* special_function */
375 "R_CRIS_32_GOTREL", /* name */
376 FALSE, /* partial_inplace */
377 0, /* src_mask */
378 0xffffffff, /* dst_mask */
379 FALSE), /* pcrel_offset */
380
381 /* A 32-bit offset from GOT to entry for this symbol in PLT and request
382 to create PLT entry for symbol. */
383 HOWTO (R_CRIS_32_PLT_GOTREL, /* type */
384 0, /* rightshift */
385 2, /* size (0 = byte, 1 = short, 2 = long) */
386 32, /* bitsize */
387 FALSE, /* pc_relative */
388 0, /* bitpos */
389 complain_overflow_bitfield, /* complain_on_overflow */
390 bfd_elf_generic_reloc, /* special_function */
391 "R_CRIS_32_PLT_GOTREL", /* name */
392 FALSE, /* partial_inplace */
393 0, /* src_mask */
394 0xffffffff, /* dst_mask */
395 FALSE), /* pcrel_offset */
396
397 /* A 32-bit offset from PC (location after the relocation) + addend to
398 entry for this symbol in PLT and request to create PLT entry for
399 symbol. */
400 HOWTO (R_CRIS_32_PLT_PCREL, /* type */
401 0, /* rightshift */
402 2, /* size (0 = byte, 1 = short, 2 = long) */
403 32, /* bitsize */
404 TRUE, /* pc_relative */
405 0, /* bitpos */
406 complain_overflow_bitfield, /* complain_on_overflow */
407 cris_elf_pcrel_reloc, /* special_function */
408 "R_CRIS_32_PLT_PCREL", /* name */
409 FALSE, /* partial_inplace */
410 0, /* src_mask */
411 0xffffffff, /* dst_mask */
412 TRUE) /* pcrel_offset */
413 };
414 \f
415 /* Map BFD reloc types to CRIS ELF reloc types. */
416
417 struct cris_reloc_map
418 {
419 bfd_reloc_code_real_type bfd_reloc_val;
420 unsigned int cris_reloc_val;
421 };
422
423 static const struct cris_reloc_map cris_reloc_map [] =
424 {
425 { BFD_RELOC_NONE, R_CRIS_NONE },
426 { BFD_RELOC_8, R_CRIS_8 },
427 { BFD_RELOC_16, R_CRIS_16 },
428 { BFD_RELOC_32, R_CRIS_32 },
429 { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL },
430 { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL },
431 { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL },
432 { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT },
433 { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY },
434 { BFD_RELOC_CRIS_COPY, R_CRIS_COPY },
435 { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT },
436 { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT },
437 { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE },
438 { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT },
439 { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT },
440 { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT },
441 { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT },
442 { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL },
443 { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
444 { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL }
445 };
446
447 static reloc_howto_type *
448 cris_reloc_type_lookup (abfd, code)
449 bfd * abfd ATTRIBUTE_UNUSED;
450 bfd_reloc_code_real_type code;
451 {
452 unsigned int i;
453
454 for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
455 if (cris_reloc_map [i].bfd_reloc_val == code)
456 return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
457
458 return NULL;
459 }
460
461 static reloc_howto_type *
462 cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
463 {
464 unsigned int i;
465
466 for (i = 0;
467 i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
468 i++)
469 if (cris_elf_howto_table[i].name != NULL
470 && strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
471 return &cris_elf_howto_table[i];
472
473 return NULL;
474 }
475
476 /* Set the howto pointer for an CRIS ELF reloc. */
477
478 static void
479 cris_info_to_howto_rela (abfd, cache_ptr, dst)
480 bfd * abfd ATTRIBUTE_UNUSED;
481 arelent * cache_ptr;
482 Elf_Internal_Rela * dst;
483 {
484 unsigned int r_type;
485
486 r_type = ELF32_R_TYPE (dst->r_info);
487 BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
488 cache_ptr->howto = & cris_elf_howto_table [r_type];
489 }
490
491 bfd_reloc_status_type
492 cris_elf_pcrel_reloc (abfd, reloc_entry, symbol, data, input_section,
493 output_bfd, error_message)
494 bfd *abfd ATTRIBUTE_UNUSED;
495 arelent *reloc_entry;
496 asymbol *symbol;
497 PTR data ATTRIBUTE_UNUSED;
498 asection *input_section;
499 bfd *output_bfd;
500 char **error_message ATTRIBUTE_UNUSED;
501 {
502 /* By default (using only bfd_elf_generic_reloc when linking to
503 non-ELF formats) PC-relative relocs are relative to the beginning
504 of the reloc. CRIS PC-relative relocs are relative to the position
505 *after* the reloc because that's what pre-CRISv32 PC points to
506 after reading an insn field with that reloc. (For CRISv32, PC is
507 actually relative to the start of the insn, but we keep the old
508 definition.) Still, we use as much generic machinery as we can.
509
510 Only adjust when doing a final link. */
511 if (output_bfd == (bfd *) NULL)
512 reloc_entry->addend -= 1 << reloc_entry->howto->size;
513
514 return
515 bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
516 input_section, output_bfd, error_message);
517 }
518 \f
519 /* Support for core dump NOTE sections.
520 The slightly unintuitive code layout is an attempt to keep at least
521 some similarities with other ports, hoping to simplify general
522 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
523
524 static bfd_boolean
525 cris_elf_grok_prstatus (abfd, note)
526 bfd *abfd;
527 Elf_Internal_Note *note;
528 {
529 int offset;
530 size_t size;
531
532 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
533 switch (note->descsz)
534 {
535 default:
536 return FALSE;
537
538 case 202: /* Linux/CRISv32 */
539 /* pr_cursig */
540 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
541
542 /* pr_pid */
543 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
544
545 /* pr_reg */
546 offset = 70;
547 size = 128;
548
549 break;
550 }
551 else
552 switch (note->descsz)
553 {
554 default:
555 return FALSE;
556
557 case 214: /* Linux/CRIS */
558 /* pr_cursig */
559 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
560
561 /* pr_pid */
562 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
563
564 /* pr_reg */
565 offset = 70;
566 size = 140;
567
568 break;
569 }
570
571 /* Make a ".reg/999" section. */
572 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
573 size, note->descpos + offset);
574 }
575
576 static bfd_boolean
577 cris_elf_grok_psinfo (abfd, note)
578 bfd *abfd;
579 Elf_Internal_Note *note;
580 {
581 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
582 switch (note->descsz)
583 {
584 default:
585 return FALSE;
586
587 case 124: /* Linux/CRISv32 elf_prpsinfo */
588 elf_tdata (abfd)->core_program
589 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
590 elf_tdata (abfd)->core_command
591 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
592 }
593 else
594 switch (note->descsz)
595 {
596 default:
597 return FALSE;
598
599 case 124: /* Linux/CRIS elf_prpsinfo */
600 elf_tdata (abfd)->core_program
601 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
602 elf_tdata (abfd)->core_command
603 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
604 }
605
606 /* Note that for some reason, a spurious space is tacked
607 onto the end of the args in some (at least one anyway)
608 implementations, so strip it off if it exists. */
609
610 {
611 char *command = elf_tdata (abfd)->core_command;
612 int n = strlen (command);
613
614 if (0 < n && command[n - 1] == ' ')
615 command[n - 1] = '\0';
616 }
617
618 return TRUE;
619 }
620 \f
621 /* The name of the dynamic interpreter. This is put in the .interp
622 section. */
623
624 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
625
626 /* The size in bytes of an entry in the procedure linkage table. */
627
628 #define PLT_ENTRY_SIZE 20
629 #define PLT_ENTRY_SIZE_V32 26
630
631 /* The first entry in an absolute procedure linkage table looks like this. */
632
633 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
634 {
635 0xfc, 0xe1,
636 0x7e, 0x7e, /* push mof. */
637 0x7f, 0x0d, /* (dip [pc+]) */
638 0, 0, 0, 0, /* Replaced with address of .got + 4. */
639 0x30, 0x7a, /* move [...],mof */
640 0x7f, 0x0d, /* (dip [pc+]) */
641 0, 0, 0, 0, /* Replaced with address of .got + 8. */
642 0x30, 0x09 /* jump [...] */
643 };
644
645 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
646 {
647 0x84, 0xe2, /* subq 4,$sp */
648 0x6f, 0xfe, /* move.d 0,$acr */
649 0, 0, 0, 0, /* Replaced by address of .got + 4. */
650 0x7e, 0x7a, /* move $mof,[$sp] */
651 0x3f, 0x7a, /* move [$acr],$mof */
652 0x04, 0xf2, /* addq 4,acr */
653 0x6f, 0xfa, /* move.d [$acr],$acr */
654 0xbf, 0x09, /* jump $acr */
655 0xb0, 0x05, /* nop */
656 0, 0 /* Pad out to 26 bytes. */
657 };
658
659 /* Subsequent entries in an absolute procedure linkage table look like
660 this. */
661
662 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
663 {
664 0x7f, 0x0d, /* (dip [pc+]) */
665 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
666 0x30, 0x09, /* jump [...] */
667 0x3f, 0x7e, /* move [pc+],mof */
668 0, 0, 0, 0, /* Replaced with offset into relocation table. */
669 0x2f, 0xfe, /* add.d [pc+],pc */
670 0xec, 0xff,
671 0xff, 0xff /* Replaced with offset to start of .plt. */
672 };
673
674 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
675 {
676 0x6f, 0xfe, /* move.d 0,$acr */
677 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
678 0x6f, 0xfa, /* move.d [$acr],$acr */
679 0xbf, 0x09, /* jump $acr */
680 0xb0, 0x05, /* nop */
681 0x3f, 0x7e, /* move 0,mof */
682 0, 0, 0, 0, /* Replaced with offset into relocation table. */
683 0xbf, 0x0e, /* ba start_of_plt0_entry */
684 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
685 0xb0, 0x05 /* nop */
686 };
687
688 /* The first entry in a PIC procedure linkage table looks like this. */
689
690 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
691 {
692 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
693 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
694 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
695 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
696 };
697
698 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
699 {
700 0x84, 0xe2, /* subq 4,$sp */
701 0x04, 0x01, /* addoq 4,$r0,$acr */
702 0x7e, 0x7a, /* move $mof,[$sp] */
703 0x3f, 0x7a, /* move [$acr],$mof */
704 0x04, 0xf2, /* addq 4,$acr */
705 0x6f, 0xfa, /* move.d [$acr],$acr */
706 0xbf, 0x09, /* jump $acr */
707 0xb0, 0x05, /* nop */
708 0, 0, /* Pad out to 26 bytes. */
709 0, 0, 0, 0,
710 0, 0, 0, 0
711 };
712
713 /* Subsequent entries in a PIC procedure linkage table look like this. */
714
715 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
716 {
717 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
718 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
719 0x30, 0x09, /* jump [...] */
720 0x3f, 0x7e, /* move [pc+],mof */
721 0, 0, 0, 0, /* Replaced with offset into relocation table. */
722 0x2f, 0xfe, /* add.d [pc+],pc */
723 0xec, 0xff, /* Replaced with offset to start of .plt. */
724 0xff, 0xff
725 };
726
727 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
728 {
729 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
730 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
731 0x6f, 0xfa, /* move.d [$acr],$acr */
732 0xbf, 0x09, /* jump $acr */
733 0xb0, 0x05, /* nop */
734 0x3f, 0x7e, /* move relocoffs,$mof */
735 0, 0, 0, 0, /* Replaced with offset into relocation table. */
736 0xbf, 0x0e, /* ba start_of_plt */
737 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
738 0xb0, 0x05 /* nop */
739 };
740 \f
741 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
742 (and most other PIC/shlib stuff). Check that we don't drift away
743 without reason.
744
745 The CRIS linker, like the m68k and i386 linkers (and probably the rest
746 too) needs to keep track of the number of relocs that it decides to
747 copy in check_relocs for each symbol. This is so that it can discard
748 PC relative relocs if it doesn't need them when linking with
749 -Bsymbolic. We store the information in a field extending the regular
750 ELF linker hash table. */
751
752 /* This structure keeps track of the number of PC relative relocs we have
753 copied for a given symbol. */
754
755 struct elf_cris_pcrel_relocs_copied
756 {
757 /* Next section. */
758 struct elf_cris_pcrel_relocs_copied *next;
759 /* A section in dynobj. */
760 asection *section;
761 /* Number of relocs copied in this section. */
762 bfd_size_type count;
763 };
764
765 /* CRIS ELF linker hash entry. */
766
767 struct elf_cris_link_hash_entry
768 {
769 struct elf_link_hash_entry root;
770
771 /* Number of PC relative relocs copied for this symbol. */
772 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
773
774 /* The GOTPLT references are CRIS-specific; the goal is to avoid having
775 both a general GOT and a PLT-specific GOT entry for the same symbol,
776 when it is referenced both as a function and as a function pointer.
777
778 Number of GOTPLT references for a function. */
779 bfd_signed_vma gotplt_refcount;
780
781 /* Actual GOTPLT index for this symbol, if applicable, or zero if not
782 (zero is never used as an index). FIXME: We should be able to fold
783 this with gotplt_refcount in a union, like the got and plt unions in
784 elf_link_hash_entry. */
785 bfd_size_type gotplt_offset;
786 };
787
788 /* CRIS ELF linker hash table. */
789
790 struct elf_cris_link_hash_table
791 {
792 struct elf_link_hash_table root;
793
794 /* We can't use the PLT offset and calculate to get the GOTPLT offset,
795 since we try and avoid creating GOTPLT:s when there's already a GOT.
796 Instead, we keep and update the next available index here. */
797 bfd_size_type next_gotplt_entry;
798 };
799
800 /* Traverse a CRIS ELF linker hash table. */
801
802 #define elf_cris_link_hash_traverse(table, func, info) \
803 (elf_link_hash_traverse \
804 (&(table)->root, \
805 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
806 (info)))
807
808 /* Get the CRIS ELF linker hash table from a link_info structure. */
809
810 #define elf_cris_hash_table(p) \
811 ((struct elf_cris_link_hash_table *) (p)->hash)
812
813 /* Create an entry in a CRIS ELF linker hash table. */
814
815 static struct bfd_hash_entry *
816 elf_cris_link_hash_newfunc (entry, table, string)
817 struct bfd_hash_entry *entry;
818 struct bfd_hash_table *table;
819 const char *string;
820 {
821 struct elf_cris_link_hash_entry *ret =
822 (struct elf_cris_link_hash_entry *) entry;
823
824 /* Allocate the structure if it has not already been allocated by a
825 subclass. */
826 if (ret == (struct elf_cris_link_hash_entry *) NULL)
827 ret = ((struct elf_cris_link_hash_entry *)
828 bfd_hash_allocate (table,
829 sizeof (struct elf_cris_link_hash_entry)));
830 if (ret == (struct elf_cris_link_hash_entry *) NULL)
831 return (struct bfd_hash_entry *) ret;
832
833 /* Call the allocation method of the superclass. */
834 ret = ((struct elf_cris_link_hash_entry *)
835 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
836 table, string));
837 if (ret != (struct elf_cris_link_hash_entry *) NULL)
838 {
839 ret->pcrel_relocs_copied = NULL;
840 ret->gotplt_refcount = 0;
841 ret->gotplt_offset = 0;
842 }
843
844 return (struct bfd_hash_entry *) ret;
845 }
846
847 /* Create a CRIS ELF linker hash table. */
848
849 static struct bfd_link_hash_table *
850 elf_cris_link_hash_table_create (abfd)
851 bfd *abfd;
852 {
853 struct elf_cris_link_hash_table *ret;
854 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
855
856 ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
857 if (ret == (struct elf_cris_link_hash_table *) NULL)
858 return NULL;
859
860 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
861 elf_cris_link_hash_newfunc,
862 sizeof (struct elf_cris_link_hash_entry)))
863 {
864 free (ret);
865 return NULL;
866 }
867
868 /* Initialize to skip over the first three entries in the gotplt; they
869 are used for run-time symbol evaluation. */
870 ret->next_gotplt_entry = 12;
871
872 return &ret->root.root;
873 }
874 \f
875 /* Perform a single relocation. By default we use the standard BFD
876 routines, with a few tweaks. */
877
878 static bfd_reloc_status_type
879 cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
880 relocation)
881 reloc_howto_type * howto;
882 bfd * input_bfd;
883 asection * input_section;
884 bfd_byte * contents;
885 Elf_Internal_Rela * rel;
886 bfd_vma relocation;
887 {
888 bfd_reloc_status_type r;
889
890 /* PC-relative relocations are relative to the position *after*
891 the reloc. Note that for R_CRIS_8_PCREL the adjustment is
892 not a single byte, since PC must be 16-bit-aligned. */
893 switch (ELF32_R_TYPE (rel->r_info))
894 {
895 /* Check that the 16-bit GOT relocs are positive. */
896 case R_CRIS_16_GOTPLT:
897 case R_CRIS_16_GOT:
898 if ((bfd_signed_vma) relocation < 0)
899 return bfd_reloc_overflow;
900 break;
901
902 case R_CRIS_32_PLT_PCREL:
903 case R_CRIS_32_PCREL:
904 relocation -= 2;
905 /* Fall through. */
906 case R_CRIS_8_PCREL:
907 case R_CRIS_16_PCREL:
908 relocation -= 2;
909 break;
910
911 default:
912 break;
913 }
914
915 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
916 contents, rel->r_offset,
917 relocation, rel->r_addend);
918 return r;
919 }
920 \f
921 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
922 copied, for further comments. */
923
924 static bfd_boolean
925 cris_elf_relocate_section (output_bfd, info, input_bfd, input_section,
926 contents, relocs, local_syms, local_sections)
927 bfd *output_bfd ATTRIBUTE_UNUSED;
928 struct bfd_link_info *info;
929 bfd *input_bfd;
930 asection *input_section;
931 bfd_byte *contents;
932 Elf_Internal_Rela *relocs;
933 Elf_Internal_Sym *local_syms;
934 asection **local_sections;
935 {
936 bfd *dynobj;
937 Elf_Internal_Shdr *symtab_hdr;
938 struct elf_link_hash_entry **sym_hashes;
939 bfd_vma *local_got_offsets;
940 asection *sgot;
941 asection *splt;
942 asection *sreloc;
943 Elf_Internal_Rela *rel;
944 Elf_Internal_Rela *relend;
945
946 dynobj = elf_hash_table (info)->dynobj;
947 local_got_offsets = elf_local_got_offsets (input_bfd);
948 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
949 sym_hashes = elf_sym_hashes (input_bfd);
950 relend = relocs + input_section->reloc_count;
951
952 sgot = NULL;
953 splt = NULL;
954 sreloc = NULL;
955
956 if (dynobj != NULL)
957 {
958 splt = bfd_get_section_by_name (dynobj, ".plt");
959 sgot = bfd_get_section_by_name (dynobj, ".got");
960 }
961
962 for (rel = relocs; rel < relend; rel ++)
963 {
964 reloc_howto_type *howto;
965 unsigned long r_symndx;
966 Elf_Internal_Sym *sym;
967 asection *sec;
968 struct elf_link_hash_entry *h;
969 bfd_vma relocation;
970 bfd_reloc_status_type r;
971 const char *symname = NULL;
972 int r_type;
973
974 r_type = ELF32_R_TYPE (rel->r_info);
975
976 if ( r_type == R_CRIS_GNU_VTINHERIT
977 || r_type == R_CRIS_GNU_VTENTRY)
978 continue;
979
980 r_symndx = ELF32_R_SYM (rel->r_info);
981 howto = cris_elf_howto_table + r_type;
982 h = NULL;
983 sym = NULL;
984 sec = NULL;
985
986 if (r_symndx < symtab_hdr->sh_info)
987 {
988 sym = local_syms + r_symndx;
989 sec = local_sections [r_symndx];
990 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
991
992 symname = (bfd_elf_string_from_elf_section
993 (input_bfd, symtab_hdr->sh_link, sym->st_name));
994 if (symname == NULL)
995 symname = bfd_section_name (input_bfd, sec);
996 }
997 else
998 {
999 bfd_boolean warned;
1000 bfd_boolean unresolved_reloc;
1001
1002 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1003 r_symndx, symtab_hdr, sym_hashes,
1004 h, sec, relocation,
1005 unresolved_reloc, warned);
1006
1007 if (unresolved_reloc
1008 /* Perhaps we should detect the cases that
1009 sec->output_section is expected to be NULL like i386 and
1010 m68k, but apparently (and according to elfxx-ia64.c) all
1011 valid cases are where the symbol is defined in a shared
1012 object which we link dynamically against. This includes
1013 PLT relocs for which we've created a PLT entry and other
1014 relocs for which we're prepared to create dynamic
1015 relocations.
1016
1017 For now, new situations cause us to just err when
1018 sec->output_offset is NULL but the object with the symbol
1019 is *not* dynamically linked against. Thus this will
1020 automatically remind us so we can see if there are other
1021 valid cases we need to revisit. */
1022 && (sec->owner->flags & DYNAMIC) != 0)
1023 relocation = 0;
1024
1025 else if (h->root.type == bfd_link_hash_defined
1026 || h->root.type == bfd_link_hash_defweak)
1027 {
1028 /* Here follow the cases where the relocation value must
1029 be zero (or when further handling is simplified when
1030 zero). I can't claim to understand the various
1031 conditions and they weren't described in the files
1032 where I copied them from (elf32-m68k.c and
1033 elf32-i386.c), but let's mention examples of where
1034 they happen. FIXME: Perhaps define and use a
1035 dynamic_symbol_p function like ia64.
1036
1037 - When creating a shared library, we can have an
1038 ordinary relocation for a symbol defined in a shared
1039 library (perhaps the one we create). We then make
1040 the relocation value zero, as the value seen now will
1041 be added into the relocation addend in this shared
1042 library, but must be handled only at dynamic-link
1043 time. FIXME: Not sure this example covers the
1044 h->elf_link_hash_flags test, though it's there in
1045 other targets. */
1046 if (info->shared
1047 && ((! info->symbolic && h->dynindx != -1)
1048 || !h->def_regular)
1049 && (input_section->flags & SEC_ALLOC) != 0
1050 && (r_type == R_CRIS_8
1051 || r_type == R_CRIS_16
1052 || r_type == R_CRIS_32
1053 || r_type == R_CRIS_8_PCREL
1054 || r_type == R_CRIS_16_PCREL
1055 || r_type == R_CRIS_32_PCREL))
1056 relocation = 0;
1057 else if (!info->relocatable && unresolved_reloc)
1058 {
1059 _bfd_error_handler
1060 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1061 input_bfd,
1062 input_section,
1063 cris_elf_howto_table[r_type].name,
1064 symname);
1065 bfd_set_error (bfd_error_bad_value);
1066 return FALSE;
1067 }
1068 }
1069 }
1070
1071 if (sec != NULL && elf_discarded_section (sec))
1072 {
1073 /* For relocs against symbols from removed linkonce sections,
1074 or sections discarded by a linker script, we just want the
1075 section contents zeroed. Avoid any special processing. */
1076 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1077 rel->r_info = 0;
1078 rel->r_addend = 0;
1079 continue;
1080 }
1081
1082 if (info->relocatable)
1083 continue;
1084
1085 switch (r_type)
1086 {
1087 case R_CRIS_16_GOTPLT:
1088 case R_CRIS_32_GOTPLT:
1089 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1090 but we require a PLT, and the PLT handling will take care of
1091 filling in the PLT-specific GOT entry. For the GOT offset,
1092 calculate it as we do when filling it in for the .got.plt
1093 section. If we don't have a PLT, punt to GOT handling. */
1094 if (h != NULL
1095 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1096 {
1097 asection *sgotplt
1098 = bfd_get_section_by_name (dynobj, ".got.plt");
1099 bfd_vma got_offset;
1100
1101 BFD_ASSERT (h->dynindx != -1);
1102 BFD_ASSERT (sgotplt != NULL);
1103
1104 got_offset
1105 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1106
1107 relocation = got_offset;
1108 break;
1109 }
1110
1111 /* We didn't make a PLT entry for this symbol. Maybe everything is
1112 folded into the GOT. Other than folding, this happens when
1113 statically linking PIC code, or when using -Bsymbolic. Check
1114 that we instead have a GOT entry as done for us by
1115 elf_cris_adjust_dynamic_symbol, and drop through into the
1116 ordinary GOT cases. This must not happen for the
1117 executable, because any reference it does to a function
1118 that is satisfied by a DSO must generate a PLT. We assume
1119 these call-specific relocs don't address non-functions. */
1120 if (h != NULL
1121 && (h->got.offset == (bfd_vma) -1
1122 || (!info->shared
1123 && !(h->def_regular
1124 || (!h->def_dynamic
1125 && h->root.type == bfd_link_hash_undefweak)))))
1126 {
1127 (*_bfd_error_handler)
1128 ((h->got.offset == (bfd_vma) -1)
1129 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1130 " against symbol `%s'")
1131 : _("%B, section %A: No PLT for relocation %s"
1132 " against symbol `%s'"),
1133 input_bfd,
1134 input_section,
1135 cris_elf_howto_table[r_type].name,
1136 (symname != NULL && symname[0] != '\0'
1137 ? symname : _("[whose name is lost]")));
1138
1139 /* FIXME: Perhaps blaming input is not the right thing to
1140 do; this is probably an internal error. But it is true
1141 that we didn't like that particular input. */
1142 bfd_set_error (bfd_error_bad_value);
1143 return FALSE;
1144 }
1145 /* Fall through. */
1146
1147 /* The size of the actual relocation is not used here; we only
1148 fill in the GOT table here. */
1149 case R_CRIS_16_GOT:
1150 case R_CRIS_32_GOT:
1151 {
1152 bfd_vma off;
1153
1154 /* Note that despite using RELA relocations, the .got contents
1155 is always filled in with the link-relative relocation
1156 value; the addend. */
1157
1158 if (h != NULL)
1159 {
1160 off = h->got.offset;
1161 BFD_ASSERT (off != (bfd_vma) -1);
1162
1163 if (!elf_hash_table (info)->dynamic_sections_created
1164 || (! info->shared
1165 && (h->def_regular
1166 || h->type == STT_FUNC
1167 || h->needs_plt))
1168 || (info->shared
1169 && (info->symbolic || h->dynindx == -1)
1170 && h->def_regular))
1171 {
1172 /* This wasn't checked above for ! info->shared, but
1173 must hold there if we get here; the symbol must
1174 be defined in the regular program or be undefweak
1175 or be a function or otherwise need a PLT. */
1176 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1177 || info->shared
1178 || h->def_regular
1179 || h->type == STT_FUNC
1180 || h->needs_plt
1181 || h->root.type == bfd_link_hash_undefweak);
1182
1183 /* This is actually a static link, or it is a
1184 -Bsymbolic link and the symbol is defined locally,
1185 or is undefweak, or the symbol was forced to be
1186 local because of a version file, or we're not
1187 creating a dynamic object. We must initialize this
1188 entry in the global offset table. Since the offset
1189 must always be a multiple of 4, we use the least
1190 significant bit to record whether we have
1191 initialized it already.
1192
1193 If this GOT entry should be runtime-initialized, we
1194 will create a .rela.got relocation entry to
1195 initialize the value. This is done in the
1196 finish_dynamic_symbol routine. */
1197 if ((off & 1) != 0)
1198 off &= ~1;
1199 else
1200 {
1201 bfd_put_32 (output_bfd, relocation,
1202 sgot->contents + off);
1203 h->got.offset |= 1;
1204 }
1205 }
1206 }
1207 else
1208 {
1209 BFD_ASSERT (local_got_offsets != NULL
1210 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1211
1212 off = local_got_offsets[r_symndx];
1213
1214 /* The offset must always be a multiple of 4. We use
1215 the least significant bit to record whether we have
1216 already generated the necessary reloc. */
1217 if ((off & 1) != 0)
1218 off &= ~1;
1219 else
1220 {
1221 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1222
1223 if (info->shared)
1224 {
1225 asection *s;
1226 Elf_Internal_Rela outrel;
1227 bfd_byte *loc;
1228
1229 s = bfd_get_section_by_name (dynobj, ".rela.got");
1230 BFD_ASSERT (s != NULL);
1231
1232 outrel.r_offset = (sgot->output_section->vma
1233 + sgot->output_offset
1234 + off);
1235 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1236 outrel.r_addend = relocation;
1237 loc = s->contents;
1238 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1239 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1240 }
1241
1242 local_got_offsets[r_symndx] |= 1;
1243 }
1244 }
1245
1246 relocation = sgot->output_offset + off;
1247 if (rel->r_addend != 0)
1248 {
1249 /* We can't do anything for a relocation which is against
1250 a symbol *plus offset*. GOT holds relocations for
1251 symbols. Make this an error; the compiler isn't
1252 allowed to pass us these kinds of things. */
1253 if (h == NULL)
1254 (*_bfd_error_handler)
1255 (_("%B, section %A: relocation %s with non-zero addend %d"
1256 " against local symbol"),
1257 input_bfd,
1258 input_section,
1259 cris_elf_howto_table[r_type].name,
1260 rel->r_addend);
1261 else
1262 (*_bfd_error_handler)
1263 (_("%B, section %A: relocation %s with non-zero addend %d"
1264 " against symbol `%s'"),
1265 input_bfd,
1266 input_section,
1267 cris_elf_howto_table[r_type].name,
1268 rel->r_addend,
1269 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1270
1271 bfd_set_error (bfd_error_bad_value);
1272 return FALSE;
1273 }
1274 }
1275 break;
1276
1277 case R_CRIS_32_GOTREL:
1278 /* This relocation must only be performed against local symbols.
1279 It's also ok when we link a program and the symbol is either
1280 defined in an ordinary (non-DSO) object or is undefined weak. */
1281 if (h != NULL
1282 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1283 && !(!info->shared
1284 && (h->def_regular
1285 || (!h->def_dynamic
1286 && h->root.type == bfd_link_hash_undefweak))))
1287 {
1288 (*_bfd_error_handler)
1289 (_("%B, section %A: relocation %s is"
1290 " not allowed for global symbol: `%s'"),
1291 input_bfd,
1292 input_section,
1293 cris_elf_howto_table[r_type].name,
1294 symname);
1295 bfd_set_error (bfd_error_bad_value);
1296 return FALSE;
1297 }
1298
1299 /* This can happen if we get a link error with the input ELF
1300 variant mismatching the output variant. Emit an error so
1301 it's noticed if it happens elsewhere. */
1302 if (sgot == NULL)
1303 {
1304 (*_bfd_error_handler)
1305 (_("%B, section %A: relocation %s with no GOT created"),
1306 input_bfd,
1307 input_section,
1308 cris_elf_howto_table[r_type].name);
1309 bfd_set_error (bfd_error_bad_value);
1310 return FALSE;
1311 }
1312
1313 /* This relocation is like a PC-relative one, except the
1314 reference point is the location of GOT. Note that
1315 sgot->output_offset is not involved in this calculation. We
1316 always want the start of entire .got section, not the
1317 position after the reserved header. */
1318 relocation -= sgot->output_section->vma;
1319 break;
1320
1321 case R_CRIS_32_PLT_PCREL:
1322 /* Relocation is to the entry for this symbol in the
1323 procedure linkage table. */
1324
1325 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1326 without using the procedure linkage table. */
1327 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1328 break;
1329
1330 if (h->plt.offset == (bfd_vma) -1
1331 || splt == NULL)
1332 {
1333 /* We didn't make a PLT entry for this symbol. This
1334 happens when statically linking PIC code, or when
1335 using -Bsymbolic. */
1336 break;
1337 }
1338
1339 relocation = (splt->output_section->vma
1340 + splt->output_offset
1341 + h->plt.offset);
1342 break;
1343
1344 case R_CRIS_32_PLT_GOTREL:
1345 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1346 start of the .got section. See also comment at
1347 R_CRIS_32_GOT. */
1348 relocation -= sgot->output_section->vma;
1349
1350 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1351 without using the procedure linkage table. */
1352 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1353 break;
1354
1355 if (h->plt.offset == (bfd_vma) -1
1356 || splt == NULL)
1357 {
1358 /* We didn't make a PLT entry for this symbol. This
1359 happens when statically linking PIC code, or when
1360 using -Bsymbolic. */
1361 break;
1362 }
1363
1364 relocation = (splt->output_section->vma
1365 + splt->output_offset
1366 + h->plt.offset
1367 - sgot->output_section->vma);
1368 break;
1369
1370 case R_CRIS_8_PCREL:
1371 case R_CRIS_16_PCREL:
1372 case R_CRIS_32_PCREL:
1373 /* If the symbol was local, we need no shlib-specific handling. */
1374 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1375 break;
1376
1377 /* Fall through. */
1378 case R_CRIS_8:
1379 case R_CRIS_16:
1380 case R_CRIS_32:
1381 if (info->shared
1382 && r_symndx != 0
1383 && (input_section->flags & SEC_ALLOC) != 0
1384 && ((r_type != R_CRIS_8_PCREL
1385 && r_type != R_CRIS_16_PCREL
1386 && r_type != R_CRIS_32_PCREL)
1387 || (!info->symbolic
1388 || !h->def_regular)))
1389 {
1390 Elf_Internal_Rela outrel;
1391 bfd_byte *loc;
1392 bfd_boolean skip, relocate;
1393
1394 /* When generating a shared object, these relocations
1395 are copied into the output file to be resolved at run
1396 time. */
1397
1398 if (sreloc == NULL)
1399 {
1400 const char *name;
1401
1402 name = (bfd_elf_string_from_elf_section
1403 (input_bfd,
1404 elf_elfheader (input_bfd)->e_shstrndx,
1405 elf_section_data (input_section)->rel_hdr.sh_name));
1406 if (name == NULL)
1407 return FALSE;
1408
1409 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
1410 && strcmp (bfd_get_section_name (input_bfd,
1411 input_section),
1412 name + 5) == 0);
1413
1414 sreloc = bfd_get_section_by_name (dynobj, name);
1415
1416 /* That section should have been created in
1417 cris_elf_check_relocs, but that function will not be
1418 called for objects which fail in
1419 cris_elf_merge_private_bfd_data. */
1420 if (sreloc == NULL)
1421 {
1422 (*_bfd_error_handler)
1423 (_("%B: Internal inconsistency; no relocation section %s"),
1424 input_bfd,
1425 name);
1426
1427 bfd_set_error (bfd_error_bad_value);
1428 return FALSE;
1429 }
1430 }
1431
1432 skip = FALSE;
1433 relocate = FALSE;
1434
1435 outrel.r_offset =
1436 _bfd_elf_section_offset (output_bfd, info, input_section,
1437 rel->r_offset);
1438 if (outrel.r_offset == (bfd_vma) -1)
1439 skip = TRUE;
1440 else if (outrel.r_offset == (bfd_vma) -2)
1441 skip = TRUE, relocate = TRUE;
1442 outrel.r_offset += (input_section->output_section->vma
1443 + input_section->output_offset);
1444
1445 if (skip)
1446 memset (&outrel, 0, sizeof outrel);
1447 /* h->dynindx may be -1 if the symbol was marked to
1448 become local. */
1449 else if (h != NULL
1450 && ((! info->symbolic && h->dynindx != -1)
1451 || !h->def_regular))
1452 {
1453 BFD_ASSERT (h->dynindx != -1);
1454 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1455 outrel.r_addend = relocation + rel->r_addend;
1456 }
1457 else
1458 {
1459 outrel.r_addend = relocation + rel->r_addend;
1460
1461 if (r_type == R_CRIS_32)
1462 {
1463 relocate = TRUE;
1464 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1465 }
1466 else
1467 {
1468 long indx;
1469
1470 if (bfd_is_abs_section (sec))
1471 indx = 0;
1472 else if (sec == NULL || sec->owner == NULL)
1473 {
1474 bfd_set_error (bfd_error_bad_value);
1475 return FALSE;
1476 }
1477 else
1478 {
1479 asection *osec;
1480
1481 /* We are turning this relocation into one
1482 against a section symbol. It would be
1483 proper to subtract the symbol's value,
1484 osec->vma, from the emitted reloc addend,
1485 but ld.so expects buggy relocs. */
1486 osec = sec->output_section;
1487 indx = elf_section_data (osec)->dynindx;
1488 if (indx == 0)
1489 {
1490 struct elf_cris_link_hash_table *htab;
1491 htab = elf_cris_hash_table (info);
1492 osec = htab->root.text_index_section;
1493 indx = elf_section_data (osec)->dynindx;
1494 }
1495 BFD_ASSERT (indx != 0);
1496 }
1497
1498 outrel.r_info = ELF32_R_INFO (indx, r_type);
1499 }
1500 }
1501
1502 loc = sreloc->contents;
1503 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1504 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1505
1506 /* This reloc will be computed at runtime, so there's no
1507 need to do anything now, except for R_CRIS_32 relocations
1508 that have been turned into R_CRIS_RELATIVE. */
1509 if (!relocate)
1510 continue;
1511 }
1512
1513 break;
1514 }
1515
1516 r = cris_final_link_relocate (howto, input_bfd, input_section,
1517 contents, rel, relocation);
1518
1519 if (r != bfd_reloc_ok)
1520 {
1521 const char * msg = (const char *) NULL;
1522
1523 switch (r)
1524 {
1525 case bfd_reloc_overflow:
1526 r = info->callbacks->reloc_overflow
1527 (info, (h ? &h->root : NULL), symname, howto->name,
1528 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1529 break;
1530
1531 case bfd_reloc_undefined:
1532 r = info->callbacks->undefined_symbol
1533 (info, symname, input_bfd, input_section, rel->r_offset,
1534 TRUE);
1535 break;
1536
1537 case bfd_reloc_outofrange:
1538 msg = _("internal error: out of range error");
1539 break;
1540
1541 case bfd_reloc_notsupported:
1542 msg = _("internal error: unsupported relocation error");
1543 break;
1544
1545 case bfd_reloc_dangerous:
1546 msg = _("internal error: dangerous relocation");
1547 break;
1548
1549 default:
1550 msg = _("internal error: unknown error");
1551 break;
1552 }
1553
1554 if (msg)
1555 r = info->callbacks->warning
1556 (info, msg, symname, input_bfd, input_section, rel->r_offset);
1557
1558 if (! r)
1559 return FALSE;
1560 }
1561 }
1562
1563 return TRUE;
1564 }
1565 \f
1566 /* Finish up dynamic symbol handling. We set the contents of various
1567 dynamic sections here. */
1568
1569 static bfd_boolean
1570 elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym)
1571 bfd *output_bfd;
1572 struct bfd_link_info *info;
1573 struct elf_link_hash_entry *h;
1574 Elf_Internal_Sym *sym;
1575 {
1576 bfd *dynobj;
1577
1578 /* Where in the plt entry to put values. */
1579 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
1580
1581 /* What offset to add to the distance to the first PLT entry for the
1582 value at plt_off3. */
1583 int plt_off3_value_bias = 4;
1584
1585 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
1586 for PIC and non-PIC for v32 and pre-v32). */
1587 int plt_stub_offset = 8;
1588 int plt_entry_size = PLT_ENTRY_SIZE;
1589 const bfd_byte *plt_entry = elf_cris_plt_entry;
1590 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
1591
1592 /* Adjust the various PLT entry offsets. */
1593 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1594 {
1595 plt_off2 = 14;
1596 plt_off3 = 20;
1597 plt_off3_value_bias = -2;
1598 plt_stub_offset = 12;
1599 plt_entry_size = PLT_ENTRY_SIZE_V32;
1600 plt_entry = elf_cris_plt_entry_v32;
1601 plt_pic_entry = elf_cris_pic_plt_entry_v32;
1602 }
1603
1604 dynobj = elf_hash_table (info)->dynobj;
1605
1606 if (h->plt.offset != (bfd_vma) -1)
1607 {
1608 asection *splt;
1609 asection *sgotplt;
1610 asection *sgot;
1611 asection *srela;
1612 bfd_vma got_base;
1613
1614 bfd_vma gotplt_offset
1615 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1616 Elf_Internal_Rela rela;
1617 bfd_byte *loc;
1618 bfd_boolean has_gotplt = gotplt_offset != 0;
1619
1620 /* Get the index in the procedure linkage table which
1621 corresponds to this symbol. This is the index of this symbol
1622 in all the symbols for which we are making plt entries. The
1623 first entry in the procedure linkage table is reserved. */
1624 /* We have to count backwards here, and the result is only valid as
1625 an index into .got.plt and its relocations. FIXME: Constants... */
1626 bfd_vma gotplt_index = gotplt_offset/4 - 3;
1627
1628 /* Get the offset into the .got table of the entry that corresponds
1629 to this function. Note that we embed knowledge that "incoming"
1630 .got goes after .got.plt in the output without padding (pointer
1631 aligned). However, that knowledge is present in several other
1632 places too. */
1633 bfd_vma got_offset
1634 = (has_gotplt
1635 ? gotplt_offset
1636 : h->got.offset + elf_cris_hash_table(info)->next_gotplt_entry);
1637
1638 /* This symbol has an entry in the procedure linkage table. Set it
1639 up. */
1640
1641 BFD_ASSERT (h->dynindx != -1);
1642
1643 splt = bfd_get_section_by_name (dynobj, ".plt");
1644 sgot = bfd_get_section_by_name (dynobj, ".got");
1645 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1646 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1647 BFD_ASSERT (splt != NULL && sgotplt != NULL
1648 && (! has_gotplt || srela != NULL));
1649
1650 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
1651
1652 /* Fill in the entry in the procedure linkage table. */
1653 if (! info->shared)
1654 {
1655 memcpy (splt->contents + h->plt.offset, plt_entry,
1656 plt_entry_size);
1657
1658 /* We need to enter the absolute address of the GOT entry here. */
1659 bfd_put_32 (output_bfd, got_base + got_offset,
1660 splt->contents + h->plt.offset + plt_off1);
1661 }
1662 else
1663 {
1664 memcpy (splt->contents + h->plt.offset, plt_pic_entry,
1665 plt_entry_size);
1666 bfd_put_32 (output_bfd, got_offset,
1667 splt->contents + h->plt.offset + plt_off1);
1668 }
1669
1670 /* Fill in the plt entry and make a relocation, if this is a "real"
1671 PLT entry. */
1672 if (has_gotplt)
1673 {
1674 /* Fill in the offset to the reloc table. */
1675 bfd_put_32 (output_bfd,
1676 gotplt_index * sizeof (Elf32_External_Rela),
1677 splt->contents + h->plt.offset + plt_off2);
1678
1679 /* Fill in the offset to the first PLT entry, where to "jump". */
1680 bfd_put_32 (output_bfd,
1681 - (h->plt.offset + plt_off3 + plt_off3_value_bias),
1682 splt->contents + h->plt.offset + plt_off3);
1683
1684 /* Fill in the entry in the global offset table with the address of
1685 the relocating stub. */
1686 bfd_put_32 (output_bfd,
1687 (splt->output_section->vma
1688 + splt->output_offset
1689 + h->plt.offset
1690 + plt_stub_offset),
1691 sgotplt->contents + got_offset);
1692
1693 /* Fill in the entry in the .rela.plt section. */
1694 rela.r_offset = (sgotplt->output_section->vma
1695 + sgotplt->output_offset
1696 + got_offset);
1697 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
1698 rela.r_addend = 0;
1699 loc = srela->contents + gotplt_index * sizeof (Elf32_External_Rela);
1700 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1701 }
1702
1703 if (!h->def_regular)
1704 {
1705 /* Mark the symbol as undefined, rather than as defined in
1706 the .plt section. Leave the value alone. */
1707 sym->st_shndx = SHN_UNDEF;
1708
1709 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
1710 know whether resetting the value is significant; if it really
1711 is, rather than a quirk or bug in the sparc port, then I
1712 believe we'd see this elsewhere. */
1713 /* If the symbol is weak, we do need to clear the value.
1714 Otherwise, the PLT entry would provide a definition for
1715 the symbol even if the symbol wasn't defined anywhere,
1716 and so the symbol would never be NULL. */
1717 if (!h->ref_regular_nonweak)
1718 sym->st_value = 0;
1719 }
1720 }
1721
1722 /* For an ordinary program, we emit .got relocs only for symbols that
1723 are in the dynamic-symbols table and are either defined by the
1724 program or are undefined weak symbols, or are function symbols
1725 where we do not output a PLT: the PLT reloc was output above and all
1726 references to the function symbol are redirected to the PLT. */
1727 if (h->got.offset != (bfd_vma) -1
1728 && (info->shared
1729 || (h->dynindx != -1
1730 && h->plt.offset == (bfd_vma) -1
1731 && !h->def_regular
1732 && h->root.type != bfd_link_hash_undefweak)))
1733 {
1734 asection *sgot;
1735 asection *srela;
1736 Elf_Internal_Rela rela;
1737 bfd_byte *loc;
1738 bfd_byte *where;
1739
1740 /* This symbol has an entry in the global offset table. Set it up. */
1741
1742 sgot = bfd_get_section_by_name (dynobj, ".got");
1743 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1744 BFD_ASSERT (sgot != NULL && srela != NULL);
1745
1746 rela.r_offset = (sgot->output_section->vma
1747 + sgot->output_offset
1748 + (h->got.offset &~ (bfd_vma) 1));
1749
1750 /* If this is a static link, or it is a -Bsymbolic link and the
1751 symbol is defined locally or was forced to be local because
1752 of a version file, we just want to emit a RELATIVE reloc.
1753 The entry in the global offset table will already have been
1754 initialized in the relocate_section function. */
1755 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
1756 if (! elf_hash_table (info)->dynamic_sections_created
1757 || (info->shared
1758 && (info->symbolic || h->dynindx == -1)
1759 && h->def_regular))
1760 {
1761 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1762 rela.r_addend = bfd_get_signed_32 (output_bfd, where);
1763 }
1764 else
1765 {
1766 bfd_put_32 (output_bfd, (bfd_vma) 0, where);
1767 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
1768 rela.r_addend = 0;
1769 }
1770
1771 loc = srela->contents;
1772 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1773 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1774 }
1775
1776 if (h->needs_copy)
1777 {
1778 asection *s;
1779 Elf_Internal_Rela rela;
1780 bfd_byte *loc;
1781
1782 /* This symbol needs a copy reloc. Set it up. */
1783
1784 BFD_ASSERT (h->dynindx != -1
1785 && (h->root.type == bfd_link_hash_defined
1786 || h->root.type == bfd_link_hash_defweak));
1787
1788 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1789 ".rela.bss");
1790 BFD_ASSERT (s != NULL);
1791
1792 rela.r_offset = (h->root.u.def.value
1793 + h->root.u.def.section->output_section->vma
1794 + h->root.u.def.section->output_offset);
1795 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
1796 rela.r_addend = 0;
1797 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1798 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1799 }
1800
1801 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1802 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1803 || h == elf_hash_table (info)->hgot)
1804 sym->st_shndx = SHN_ABS;
1805
1806 return TRUE;
1807 }
1808 \f
1809 /* Finish up the dynamic sections. */
1810
1811 static bfd_boolean
1812 elf_cris_finish_dynamic_sections (output_bfd, info)
1813 bfd *output_bfd;
1814 struct bfd_link_info *info;
1815 {
1816 bfd *dynobj;
1817 asection *sgot;
1818 asection *sdyn;
1819
1820 dynobj = elf_hash_table (info)->dynobj;
1821
1822 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1823 BFD_ASSERT (sgot != NULL);
1824 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1825
1826 if (elf_hash_table (info)->dynamic_sections_created)
1827 {
1828 asection *splt;
1829 Elf32_External_Dyn *dyncon, *dynconend;
1830
1831 splt = bfd_get_section_by_name (dynobj, ".plt");
1832 BFD_ASSERT (splt != NULL && sdyn != NULL);
1833
1834 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1835 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1836 for (; dyncon < dynconend; dyncon++)
1837 {
1838 Elf_Internal_Dyn dyn;
1839 asection *s;
1840
1841 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1842
1843 switch (dyn.d_tag)
1844 {
1845 default:
1846 break;
1847
1848 case DT_PLTGOT:
1849 s = bfd_get_section_by_name (output_bfd, ".got");
1850 BFD_ASSERT (s != NULL);
1851 dyn.d_un.d_ptr = s->vma;
1852 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1853 break;
1854
1855 case DT_JMPREL:
1856 /* Yes, we *can* have a .plt and no .plt.rela, for instance
1857 if all symbols are found in the .got (not .got.plt). */
1858 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1859 dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
1860 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1861 break;
1862
1863 case DT_PLTRELSZ:
1864 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1865 if (s == NULL)
1866 dyn.d_un.d_val = 0;
1867 else
1868 dyn.d_un.d_val = s->size;
1869 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1870 break;
1871
1872 case DT_RELASZ:
1873 /* The procedure linkage table relocs (DT_JMPREL) should
1874 not be included in the overall relocs (DT_RELA).
1875 Therefore, we override the DT_RELASZ entry here to
1876 make it not include the JMPREL relocs. Since the
1877 linker script arranges for .rela.plt to follow all
1878 other relocation sections, we don't have to worry
1879 about changing the DT_RELA entry. */
1880 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1881 if (s != NULL)
1882 dyn.d_un.d_val -= s->size;
1883 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1884 break;
1885 }
1886 }
1887
1888 /* Fill in the first entry in the procedure linkage table. */
1889 if (splt->size > 0)
1890 {
1891 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1892 {
1893 if (info->shared)
1894 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
1895 PLT_ENTRY_SIZE_V32);
1896 else
1897 {
1898 memcpy (splt->contents, elf_cris_plt0_entry_v32,
1899 PLT_ENTRY_SIZE_V32);
1900 bfd_put_32 (output_bfd,
1901 sgot->output_section->vma
1902 + sgot->output_offset + 4,
1903 splt->contents + 4);
1904
1905 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1906 = PLT_ENTRY_SIZE_V32;
1907 }
1908 }
1909 else
1910 {
1911 if (info->shared)
1912 memcpy (splt->contents, elf_cris_pic_plt0_entry,
1913 PLT_ENTRY_SIZE);
1914 else
1915 {
1916 memcpy (splt->contents, elf_cris_plt0_entry,
1917 PLT_ENTRY_SIZE);
1918 bfd_put_32 (output_bfd,
1919 sgot->output_section->vma
1920 + sgot->output_offset + 4,
1921 splt->contents + 6);
1922 bfd_put_32 (output_bfd,
1923 sgot->output_section->vma
1924 + sgot->output_offset + 8,
1925 splt->contents + 14);
1926
1927 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1928 = PLT_ENTRY_SIZE;
1929 }
1930 }
1931 }
1932 }
1933
1934 /* Fill in the first three entries in the global offset table. */
1935 if (sgot->size > 0)
1936 {
1937 if (sdyn == NULL)
1938 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1939 else
1940 bfd_put_32 (output_bfd,
1941 sdyn->output_section->vma + sdyn->output_offset,
1942 sgot->contents);
1943 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1944 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1945 }
1946
1947 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1948
1949 return TRUE;
1950 }
1951 \f
1952 /* Return the section that should be marked against GC for a given
1953 relocation. */
1954
1955 static asection *
1956 cris_elf_gc_mark_hook (asection *sec,
1957 struct bfd_link_info *info,
1958 Elf_Internal_Rela *rel,
1959 struct elf_link_hash_entry *h,
1960 Elf_Internal_Sym *sym)
1961 {
1962 if (h != NULL)
1963 switch (ELF32_R_TYPE (rel->r_info))
1964 {
1965 case R_CRIS_GNU_VTINHERIT:
1966 case R_CRIS_GNU_VTENTRY:
1967 return NULL;
1968 }
1969
1970 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1971 }
1972
1973 /* Update the got entry reference counts for the section being removed. */
1974
1975 static bfd_boolean
1976 cris_elf_gc_sweep_hook (bfd *abfd,
1977 struct bfd_link_info *info,
1978 asection *sec,
1979 const Elf_Internal_Rela *relocs)
1980 {
1981 Elf_Internal_Shdr *symtab_hdr;
1982 struct elf_link_hash_entry **sym_hashes;
1983 bfd_signed_vma *local_got_refcounts;
1984 const Elf_Internal_Rela *rel, *relend;
1985 bfd *dynobj;
1986 asection *sgot;
1987 asection *srelgot;
1988
1989 if (info->relocatable)
1990 return TRUE;
1991
1992 dynobj = elf_hash_table (info)->dynobj;
1993 if (dynobj == NULL)
1994 return TRUE;
1995
1996 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1997 sym_hashes = elf_sym_hashes (abfd);
1998 local_got_refcounts = elf_local_got_refcounts (abfd);
1999
2000 sgot = bfd_get_section_by_name (dynobj, ".got");
2001 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2002
2003 relend = relocs + sec->reloc_count;
2004 for (rel = relocs; rel < relend; rel++)
2005 {
2006 unsigned long r_symndx;
2007 struct elf_link_hash_entry *h = NULL;
2008
2009 r_symndx = ELF32_R_SYM (rel->r_info);
2010 if (r_symndx >= symtab_hdr->sh_info)
2011 {
2012 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2013 while (h->root.type == bfd_link_hash_indirect
2014 || h->root.type == bfd_link_hash_warning)
2015 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2016 }
2017
2018 switch (ELF32_R_TYPE (rel->r_info))
2019 {
2020 case R_CRIS_16_GOT:
2021 case R_CRIS_32_GOT:
2022 if (h != NULL)
2023 {
2024 if (h->got.refcount > 0)
2025 {
2026 --h->got.refcount;
2027 if (h->got.refcount == 0)
2028 {
2029 /* We don't need the .got entry any more. */
2030 sgot->size -= 4;
2031 srelgot->size -= sizeof (Elf32_External_Rela);
2032 }
2033 }
2034 break;
2035 }
2036
2037 local_got_reloc:
2038 if (local_got_refcounts != NULL)
2039 {
2040 if (local_got_refcounts[r_symndx] > 0)
2041 {
2042 --local_got_refcounts[r_symndx];
2043 if (local_got_refcounts[r_symndx] == 0)
2044 {
2045 /* We don't need the .got entry any more. */
2046 sgot->size -= 4;
2047 if (info->shared)
2048 srelgot->size -= sizeof (Elf32_External_Rela);
2049 }
2050 }
2051 }
2052 break;
2053
2054 case R_CRIS_16_GOTPLT:
2055 case R_CRIS_32_GOTPLT:
2056 /* For local symbols, treat these like GOT relocs. */
2057 if (h == NULL)
2058 goto local_got_reloc;
2059 /* Fall through. */
2060
2061 case R_CRIS_32_PLT_GOTREL:
2062 /* FIXME: We don't garbage-collect away the .got section. */
2063 if (local_got_refcounts != NULL)
2064 local_got_refcounts[-1]--;
2065 /* Fall through. */
2066
2067 case R_CRIS_8_PCREL:
2068 case R_CRIS_16_PCREL:
2069 case R_CRIS_32_PCREL:
2070 case R_CRIS_32_PLT_PCREL:
2071 if (h != NULL)
2072 {
2073 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2074 && h->plt.refcount > 0)
2075 --h->plt.refcount;
2076 }
2077 break;
2078
2079 default:
2080 break;
2081 }
2082 }
2083
2084 return TRUE;
2085 }
2086
2087 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2088 entry but we found we will not create any. Called when we find we will
2089 not have any PLT for this symbol, by for example
2090 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2091 or elf_cris_size_dynamic_sections if no dynamic sections will be
2092 created (we're only linking static objects). */
2093
2094 static bfd_boolean
2095 elf_cris_adjust_gotplt_to_got (h, p)
2096 struct elf_cris_link_hash_entry *h;
2097 PTR p;
2098 {
2099 struct bfd_link_info *info = (struct bfd_link_info *) p;
2100
2101 if (h->root.root.type == bfd_link_hash_warning)
2102 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
2103
2104 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2105 if (h->gotplt_refcount <= 0)
2106 return TRUE;
2107
2108 if (h->root.got.refcount > 0)
2109 {
2110 /* There's a GOT entry for this symbol. Just adjust the refcount.
2111 Probably not necessary at this stage, but keeping it accurate
2112 helps avoiding surprises later. */
2113 h->root.got.refcount += h->gotplt_refcount;
2114 h->gotplt_refcount = 0;
2115 }
2116 else
2117 {
2118 /* No GOT entry for this symbol. We need to create one. */
2119 bfd *dynobj = elf_hash_table (info)->dynobj;
2120 asection *sgot;
2121 asection *srelgot;
2122
2123 BFD_ASSERT (dynobj != NULL);
2124 sgot = bfd_get_section_by_name (dynobj, ".got");
2125 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2126
2127 /* Put an accurate refcount there. */
2128 h->root.got.refcount = h->gotplt_refcount;
2129
2130 h->gotplt_refcount = 0;
2131
2132 /* We always have a .got and a .rela.got section if there were
2133 GOTPLT relocs in input. */
2134 BFD_ASSERT (sgot != NULL && srelgot != NULL);
2135
2136 /* Allocate space in the .got section. */
2137 sgot->size += 4;
2138
2139 /* Allocate relocation space. */
2140 srelgot->size += sizeof (Elf32_External_Rela);
2141 }
2142
2143 return TRUE;
2144 }
2145
2146 /* Try to fold PLT entries with GOT entries. There are two cases when we
2147 want to do this:
2148
2149 - When all PLT references are GOTPLT references, and there are GOT
2150 references, and this is not the executable. We don't have to
2151 generate a PLT at all.
2152
2153 - When there are both (ordinary) PLT references and GOT references,
2154 and this isn't the executable.
2155 We want to make the PLT reference use the ordinary GOT entry rather
2156 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2157 since the GOT entry will have to be resolved at startup anyway.
2158
2159 Though the latter case is handled when room for the PLT is allocated,
2160 not here.
2161
2162 By folding into the GOT, we may need a round-trip to a PLT in the
2163 executable for calls, a loss in performance. Still, losing a
2164 reloc is a win in size and at least in start-up time.
2165
2166 Note that this function is called before symbols are forced local by
2167 version scripts. The differing cases are handled by
2168 elf_cris_hide_symbol. */
2169
2170 static bfd_boolean
2171 elf_cris_try_fold_plt_to_got (h, p)
2172 struct elf_cris_link_hash_entry *h;
2173 PTR p;
2174 {
2175 struct bfd_link_info *info = (struct bfd_link_info *) p;
2176
2177 /* If there are no GOT references for this symbol, we can't fold any
2178 other reference so there's nothing to do. Likewise if there are no
2179 PLT references; GOTPLT references included. */
2180 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2181 return TRUE;
2182
2183 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2184 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2185
2186 if (h->gotplt_refcount == h->root.plt.refcount)
2187 {
2188 /* The only PLT references are GOTPLT references, and there are GOT
2189 references. Convert PLT to GOT references. */
2190 if (! elf_cris_adjust_gotplt_to_got (h, info))
2191 return FALSE;
2192
2193 /* Clear the PLT references, so no PLT will be created. */
2194 h->root.plt.offset = (bfd_vma) -1;
2195 }
2196
2197 return TRUE;
2198 }
2199
2200 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2201 to use a GOT entry (and create one) rather than requiring a GOTPLT
2202 entry. */
2203
2204 static void
2205 elf_cris_hide_symbol (info, h, force_local)
2206 struct bfd_link_info *info;
2207 struct elf_link_hash_entry *h;
2208 bfd_boolean force_local;
2209 {
2210 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2211
2212 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2213 }
2214
2215 /* Adjust a symbol defined by a dynamic object and referenced by a
2216 regular object. The current definition is in some section of the
2217 dynamic object, but we're not including those sections. We have to
2218 change the definition to something the rest of the link can
2219 understand. */
2220
2221 static bfd_boolean
2222 elf_cris_adjust_dynamic_symbol (info, h)
2223 struct bfd_link_info *info;
2224 struct elf_link_hash_entry *h;
2225 {
2226 bfd *dynobj;
2227 asection *s;
2228 bfd_size_type plt_entry_size;
2229
2230 dynobj = elf_hash_table (info)->dynobj;
2231
2232 /* Make sure we know what is going on here. */
2233 BFD_ASSERT (dynobj != NULL
2234 && (h->needs_plt
2235 || h->u.weakdef != NULL
2236 || (h->def_dynamic
2237 && h->ref_regular
2238 && !h->def_regular)));
2239
2240 plt_entry_size
2241 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2242 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2243
2244 /* If this is a function, put it in the procedure linkage table. We
2245 will fill in the contents of the procedure linkage table later,
2246 when we know the address of the .got section. */
2247 if (h->type == STT_FUNC
2248 || h->needs_plt)
2249 {
2250 /* If we link a program (not a DSO), we'll get rid of unnecessary
2251 PLT entries; we point to the actual symbols -- even for pic
2252 relocs, because a program built with -fpic should have the same
2253 result as one built without -fpic, specifically considering weak
2254 symbols.
2255 FIXME: m68k and i386 differ here, for unclear reasons. */
2256 if (! info->shared
2257 && !h->def_dynamic)
2258 {
2259 /* This case can occur if we saw a PLT reloc in an input file,
2260 but the symbol was not defined by a dynamic object. In such
2261 a case, we don't actually need to build a procedure linkage
2262 table, and we can just do an absolute or PC reloc instead, or
2263 change a .got.plt index to a .got index for GOTPLT relocs. */
2264 BFD_ASSERT (h->needs_plt);
2265 h->needs_plt = 0;
2266 h->plt.offset = (bfd_vma) -1;
2267 return
2268 elf_cris_adjust_gotplt_to_got ((struct
2269 elf_cris_link_hash_entry *) h,
2270 info);
2271 }
2272
2273 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2274 where a pointer-equivalent symbol was unimportant (i.e. more
2275 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2276 of the PLT. We can't for the executable, because the GOT
2277 entries will point to the PLT there (and be constant). */
2278 if (info->shared
2279 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2280 h, info))
2281 return FALSE;
2282
2283 /* GC or folding may have rendered this entry unused. */
2284 if (h->plt.refcount <= 0)
2285 {
2286 h->needs_plt = 0;
2287 h->plt.offset = (bfd_vma) -1;
2288 return TRUE;
2289 }
2290
2291 /* Make sure this symbol is output as a dynamic symbol. */
2292 if (h->dynindx == -1)
2293 {
2294 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2295 return FALSE;
2296 }
2297
2298 s = bfd_get_section_by_name (dynobj, ".plt");
2299 BFD_ASSERT (s != NULL);
2300
2301 /* If this is the first .plt entry, make room for the special
2302 first entry. */
2303 if (s->size == 0)
2304 s->size += plt_entry_size;
2305
2306 /* If this symbol is not defined in a regular file, and we are
2307 not generating a shared library, then set the symbol to this
2308 location in the .plt. */
2309 if (!info->shared
2310 && !h->def_regular)
2311 {
2312 h->root.u.def.section = s;
2313 h->root.u.def.value = s->size;
2314 }
2315
2316 /* If there's already a GOT entry, use that, not a .got.plt. A
2317 GOT field still has a reference count when we get here; it's
2318 not yet changed to an offset. We can't do this for an
2319 executable, because then the reloc associated with the PLT
2320 would get a non-PLT reloc pointing to the PLT. FIXME: Move
2321 this to elf_cris_try_fold_plt_to_got. */
2322 if (info->shared && h->got.refcount > 0)
2323 {
2324 h->got.refcount += h->plt.refcount;
2325
2326 /* Mark the PLT offset to use the GOT entry by setting the low
2327 bit in the plt offset; it is always a multiple of
2328 plt_entry_size (which is at least a multiple of 2). */
2329 BFD_ASSERT ((s->size % plt_entry_size) == 0);
2330
2331 /* Change the PLT refcount to an offset. */
2332 h->plt.offset = s->size;
2333
2334 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2335 that the got entry should be used instead. */
2336 BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2337 h)->gotplt_offset == 0);
2338
2339 /* Make room for this entry. */
2340 s->size += plt_entry_size;
2341
2342 return TRUE;
2343 }
2344
2345 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2346 h->plt.offset = s->size;
2347
2348 /* Make room for this entry. */
2349 s->size += plt_entry_size;
2350
2351 /* We also need to make an entry in the .got.plt section, which
2352 will be placed in the .got section by the linker script. */
2353 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2354 = elf_cris_hash_table (info)->next_gotplt_entry;
2355 elf_cris_hash_table (info)->next_gotplt_entry += 4;
2356
2357 s = bfd_get_section_by_name (dynobj, ".got.plt");
2358 BFD_ASSERT (s != NULL);
2359 s->size += 4;
2360
2361 /* We also need to make an entry in the .rela.plt section. */
2362
2363 s = bfd_get_section_by_name (dynobj, ".rela.plt");
2364 BFD_ASSERT (s != NULL);
2365 s->size += sizeof (Elf32_External_Rela);
2366
2367 return TRUE;
2368 }
2369
2370 /* Reinitialize the plt offset now that it is not used as a reference
2371 count any more. */
2372 h->plt.offset = (bfd_vma) -1;
2373
2374 /* If this is a weak symbol, and there is a real definition, the
2375 processor independent code will have arranged for us to see the
2376 real definition first, and we can just use the same value. */
2377 if (h->u.weakdef != NULL)
2378 {
2379 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2380 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2381 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2382 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2383 return TRUE;
2384 }
2385
2386 /* This is a reference to a symbol defined by a dynamic object which
2387 is not a function. */
2388
2389 /* If we are creating a shared library, we must presume that the
2390 only references to the symbol are via the global offset table.
2391 For such cases we need not do anything here; the relocations will
2392 be handled correctly by relocate_section. */
2393 if (info->shared)
2394 return TRUE;
2395
2396 /* If there are no references to this symbol that do not use the
2397 GOT, we don't need to generate a copy reloc. */
2398 if (!h->non_got_ref)
2399 return TRUE;
2400
2401 if (h->size == 0)
2402 {
2403 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
2404 h->root.root.string);
2405 return TRUE;
2406 }
2407
2408 /* We must allocate the symbol in our .dynbss section, which will
2409 become part of the .bss section of the executable. There will be
2410 an entry for this symbol in the .dynsym section. The dynamic
2411 object will contain position independent code, so all references
2412 from the dynamic object to this symbol will go through the global
2413 offset table. The dynamic linker will use the .dynsym entry to
2414 determine the address it must put in the global offset table, so
2415 both the dynamic object and the regular object will refer to the
2416 same memory location for the variable. */
2417
2418 s = bfd_get_section_by_name (dynobj, ".dynbss");
2419 BFD_ASSERT (s != NULL);
2420
2421 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2422 copy the initial value out of the dynamic object and into the
2423 runtime process image. We need to remember the offset into the
2424 .rela.bss section we are going to use. */
2425 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2426 {
2427 asection *srel;
2428
2429 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
2430 BFD_ASSERT (srel != NULL);
2431 srel->size += sizeof (Elf32_External_Rela);
2432 h->needs_copy = 1;
2433 }
2434
2435 return _bfd_elf_adjust_dynamic_copy (h, s);
2436 }
2437
2438 /* Look through the relocs for a section during the first phase. */
2439
2440 static bfd_boolean
2441 cris_elf_check_relocs (abfd, info, sec, relocs)
2442 bfd *abfd;
2443 struct bfd_link_info *info;
2444 asection *sec;
2445 const Elf_Internal_Rela *relocs;
2446 {
2447 bfd *dynobj;
2448 Elf_Internal_Shdr *symtab_hdr;
2449 struct elf_link_hash_entry **sym_hashes;
2450 bfd_signed_vma *local_got_refcounts;
2451 const Elf_Internal_Rela *rel;
2452 const Elf_Internal_Rela *rel_end;
2453 asection *sgot;
2454 asection *srelgot;
2455 asection *sreloc;
2456
2457 if (info->relocatable)
2458 return TRUE;
2459
2460 dynobj = elf_hash_table (info)->dynobj;
2461 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2462 sym_hashes = elf_sym_hashes (abfd);
2463 local_got_refcounts = elf_local_got_refcounts (abfd);
2464
2465 sgot = NULL;
2466 srelgot = NULL;
2467 sreloc = NULL;
2468
2469 rel_end = relocs + sec->reloc_count;
2470 for (rel = relocs; rel < rel_end; rel++)
2471 {
2472 struct elf_link_hash_entry *h;
2473 unsigned long r_symndx;
2474 enum elf_cris_reloc_type r_type;
2475
2476 r_symndx = ELF32_R_SYM (rel->r_info);
2477 if (r_symndx < symtab_hdr->sh_info)
2478 h = NULL;
2479 else
2480 {
2481 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2482 while (h->root.type == bfd_link_hash_indirect
2483 || h->root.type == bfd_link_hash_warning)
2484 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2485 }
2486
2487 r_type = ELF32_R_TYPE (rel->r_info);
2488
2489 /* Some relocs require linker-created sections; we need to hang them
2490 on the first input bfd we found that contained dynamic relocs. */
2491 switch (r_type)
2492 {
2493 case R_CRIS_16_GOT:
2494 case R_CRIS_32_GOT:
2495 case R_CRIS_32_GOTREL:
2496 case R_CRIS_32_PLT_GOTREL:
2497 case R_CRIS_32_PLT_PCREL:
2498 case R_CRIS_16_GOTPLT:
2499 case R_CRIS_32_GOTPLT:
2500 if (dynobj == NULL)
2501 {
2502 elf_hash_table (info)->dynobj = dynobj = abfd;
2503
2504 /* We could handle this if we can get a handle on the
2505 output bfd in elf_cris_adjust_dynamic_symbol. Failing
2506 that, we must insist on dynobj being a specific mach. */
2507 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
2508 {
2509 (*_bfd_error_handler)
2510 (_("%B, section %A:\n v10/v32 compatible object %s"
2511 " must not contain a PIC relocation"),
2512 abfd, sec);
2513 return FALSE;
2514 }
2515
2516 /* Create the .got section, so we can assume it's always
2517 present whenever there's a dynobj. */
2518 if (!_bfd_elf_create_got_section (dynobj, info))
2519 return FALSE;
2520 }
2521 break;
2522
2523 default:
2524 break;
2525 }
2526
2527 /* Some relocs require a global offset table (but perhaps not a
2528 specific GOT entry). */
2529 switch (r_type)
2530 {
2531 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
2532 entry only for local symbols. Unfortunately, we don't know
2533 until later on if there's a version script that forces the
2534 symbol local. We must have the .rela.got section in place
2535 before we know if the symbol looks global now, so we need
2536 to treat the reloc just like for R_CRIS_16_GOT and
2537 R_CRIS_32_GOT. */
2538 case R_CRIS_16_GOTPLT:
2539 case R_CRIS_32_GOTPLT:
2540 case R_CRIS_16_GOT:
2541 case R_CRIS_32_GOT:
2542 if (srelgot == NULL
2543 && (h != NULL || info->shared))
2544 {
2545 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2546 if (srelgot == NULL)
2547 {
2548 srelgot = bfd_make_section_with_flags (dynobj,
2549 ".rela.got",
2550 (SEC_ALLOC
2551 | SEC_LOAD
2552 | SEC_HAS_CONTENTS
2553 | SEC_IN_MEMORY
2554 | SEC_LINKER_CREATED
2555 | SEC_READONLY));
2556 if (srelgot == NULL
2557 || !bfd_set_section_alignment (dynobj, srelgot, 2))
2558 return FALSE;
2559 }
2560 }
2561 /* Fall through. */
2562
2563 case R_CRIS_32_GOTREL:
2564 case R_CRIS_32_PLT_GOTREL:
2565 if (sgot == NULL)
2566 sgot = bfd_get_section_by_name (dynobj, ".got");
2567
2568 if (local_got_refcounts == NULL)
2569 {
2570 bfd_size_type amt;
2571
2572 /* We use index local_got_refcounts[-1] to count all
2573 GOT-relative relocations that do not have explicit
2574 GOT entries. */
2575 amt = symtab_hdr->sh_info + 1;
2576 amt *= sizeof (bfd_signed_vma);
2577 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
2578 if (local_got_refcounts == NULL)
2579 return FALSE;
2580
2581 local_got_refcounts++;
2582 elf_local_got_refcounts (abfd) = local_got_refcounts;
2583 }
2584 break;
2585
2586 default:
2587 break;
2588 }
2589
2590 switch (r_type)
2591 {
2592 case R_CRIS_16_GOTPLT:
2593 case R_CRIS_32_GOTPLT:
2594 /* Mark that we need a GOT entry if the PLT entry (and its GOT
2595 entry) is eliminated. We can only do this for a non-local
2596 symbol. */
2597 if (h != NULL)
2598 {
2599 ((struct elf_cris_link_hash_entry *) h)->gotplt_refcount++;
2600 goto handle_gotplt_reloc;
2601 }
2602 /* If h is NULL then this is a local symbol, and we must make a
2603 GOT entry for it, so handle it like a GOT reloc. */
2604 /* Fall through. */
2605
2606 case R_CRIS_16_GOT:
2607 case R_CRIS_32_GOT:
2608 /* This symbol requires a global offset table entry. */
2609 if (h != NULL)
2610 {
2611 if (h->got.refcount == 0)
2612 {
2613 /* Make sure this symbol is output as a dynamic symbol. */
2614 if (h->dynindx == -1)
2615 {
2616 if (!bfd_elf_link_record_dynamic_symbol (info, h))
2617 return FALSE;
2618 }
2619
2620 /* Allocate space in the .got section. */
2621 sgot->size += 4;
2622 /* Allocate relocation space. */
2623 srelgot->size += sizeof (Elf32_External_Rela);
2624 }
2625 h->got.refcount++;
2626 }
2627 else
2628 {
2629 /* This is a global offset table entry for a local symbol. */
2630 if (local_got_refcounts[r_symndx] == 0)
2631 {
2632 sgot->size += 4;
2633 if (info->shared)
2634 {
2635 /* If we are generating a shared object, we need to
2636 output a R_CRIS_RELATIVE reloc so that the dynamic
2637 linker can adjust this GOT entry. */
2638 srelgot->size += sizeof (Elf32_External_Rela);
2639 }
2640 }
2641 local_got_refcounts[r_symndx]++;
2642 }
2643 break;
2644
2645 case R_CRIS_32_GOTREL:
2646 /* This reference requires a global offset table.
2647 FIXME: The actual refcount isn't used currently; the .got
2648 section can't be removed if there were any references in the
2649 input. */
2650 local_got_refcounts[-1]++;
2651 break;
2652
2653 handle_gotplt_reloc:
2654
2655 case R_CRIS_32_PLT_GOTREL:
2656 /* This reference requires a global offset table. */
2657 local_got_refcounts[-1]++;
2658 /* Fall through. */
2659
2660 case R_CRIS_32_PLT_PCREL:
2661 /* This symbol requires a procedure linkage table entry. We
2662 actually build the entry in adjust_dynamic_symbol,
2663 because this might be a case of linking PIC code which is
2664 never referenced by a dynamic object, in which case we
2665 don't need to generate a procedure linkage table entry
2666 after all. */
2667
2668 /* Beware: if we'd check for visibility of the symbol here
2669 (and not marking the need for a PLT when non-visible), we'd
2670 get into trouble with keeping handling consistent with
2671 regards to relocs found before definition and GOTPLT
2672 handling. Eliminable PLT entries will be dealt with later
2673 anyway. */
2674 if (h == NULL)
2675 continue;
2676
2677 h->needs_plt = 1;
2678 h->plt.refcount++;
2679 break;
2680
2681 case R_CRIS_8:
2682 case R_CRIS_16:
2683 case R_CRIS_32:
2684 /* Let's help debug shared library creation. Any of these
2685 relocs can be used in shared libs, but pages containing them
2686 cannot be shared. Don't warn for sections we don't care
2687 about, such as debug sections or non-constant sections. We
2688 can't help tables of (global) function pointers, for example,
2689 though they must be emitted in a data section to avoid having
2690 impure text sections. */
2691 if (info->shared
2692 && (sec->flags & SEC_ALLOC) != 0
2693 && (sec->flags & SEC_READONLY) != 0)
2694 {
2695 /* FIXME: How do we make this optionally a warning only? */
2696 (*_bfd_error_handler)
2697 (_("%B, section %A:\n relocation %s should not"
2698 " be used in a shared object; recompile with -fPIC"),
2699 abfd,
2700 sec,
2701 cris_elf_howto_table[r_type].name);
2702 }
2703 /* Fall through. */
2704
2705 case R_CRIS_8_PCREL:
2706 case R_CRIS_16_PCREL:
2707 case R_CRIS_32_PCREL:
2708 if (h != NULL)
2709 {
2710 h->non_got_ref = 1;
2711
2712 /* Make sure a plt entry is created for this symbol if it
2713 turns out to be a function defined by a dynamic object. */
2714 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2715 h->plt.refcount++;
2716 }
2717
2718 /* If we are creating a shared library and this is not a local
2719 symbol, we need to copy the reloc into the shared library.
2720 However when linking with -Bsymbolic and this is a global
2721 symbol which is defined in an object we are including in the
2722 link (i.e., DEF_REGULAR is set), then we can resolve the
2723 reloc directly. At this point we have not seen all the input
2724 files, so it is possible that DEF_REGULAR is not set now but
2725 will be set later (it is never cleared). In case of a weak
2726 definition, DEF_REGULAR may be cleared later by a strong
2727 definition in a shared library. We account for that
2728 possibility below by storing information in the relocs_copied
2729 field of the hash table entry. A similar situation occurs
2730 when creating shared libraries and symbol visibility changes
2731 render the symbol local. */
2732
2733 /* No need to do anything if we're not creating a shared object. */
2734 if (! info->shared)
2735 break;
2736
2737 /* We don't need to handle relocs into sections not going into
2738 the "real" output. */
2739 if ((sec->flags & SEC_ALLOC) == 0)
2740 break;
2741
2742 /* We can only eliminate PC-relative relocs. */
2743 if (r_type == R_CRIS_8_PCREL
2744 || r_type == R_CRIS_16_PCREL
2745 || r_type == R_CRIS_32_PCREL)
2746 {
2747 /* If the symbol is local, then we can eliminate the reloc. */
2748 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2749 break;
2750
2751 /* If this is with -Bsymbolic and the symbol isn't weak, and
2752 is defined by an ordinary object (the ones we include in
2753 this shared library) then we can also eliminate the
2754 reloc. See comment above for more eliminable cases which
2755 we can't identify at this time. */
2756 if (info->symbolic
2757 && h->root.type != bfd_link_hash_defweak
2758 && h->def_regular)
2759 break;
2760
2761 if ((sec->flags & SEC_READONLY) != 0)
2762 {
2763 /* FIXME: How do we make this optionally a warning only? */
2764 (*_bfd_error_handler)
2765 (_("%B, section %A:\n relocation %s should not be used"
2766 " in a shared object; recompile with -fPIC"),
2767 abfd,
2768 sec,
2769 cris_elf_howto_table[r_type].name);
2770 }
2771 }
2772
2773 /* We create a reloc section in dynobj and make room for this
2774 reloc. */
2775 if (sreloc == NULL)
2776 {
2777 const char *name;
2778
2779 name = (bfd_elf_string_from_elf_section
2780 (abfd,
2781 elf_elfheader (abfd)->e_shstrndx,
2782 elf_section_data (sec)->rel_hdr.sh_name));
2783 if (name == NULL)
2784 return FALSE;
2785
2786 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
2787 && strcmp (bfd_get_section_name (abfd, sec),
2788 name + 5) == 0);
2789
2790 sreloc = bfd_get_section_by_name (dynobj, name);
2791 if (sreloc == NULL)
2792 {
2793 sreloc = bfd_make_section_with_flags (dynobj, name,
2794 (SEC_ALLOC
2795 | SEC_LOAD
2796 | SEC_HAS_CONTENTS
2797 | SEC_IN_MEMORY
2798 | SEC_LINKER_CREATED
2799 | SEC_READONLY));
2800 if (sreloc == NULL
2801 || !bfd_set_section_alignment (dynobj, sreloc, 2))
2802 return FALSE;
2803 }
2804 if (sec->flags & SEC_READONLY)
2805 info->flags |= DF_TEXTREL;
2806 }
2807
2808 sreloc->size += sizeof (Elf32_External_Rela);
2809
2810 /* If we are linking with -Bsymbolic, we count the number of PC
2811 relative relocations we have entered for this symbol, so that
2812 we can discard them again if the symbol is later defined by a
2813 regular object. We know that h is really a pointer to an
2814 elf_cris_link_hash_entry. */
2815 if ((r_type == R_CRIS_8_PCREL
2816 || r_type == R_CRIS_16_PCREL
2817 || r_type == R_CRIS_32_PCREL)
2818 && info->symbolic)
2819 {
2820 struct elf_cris_link_hash_entry *eh;
2821 struct elf_cris_pcrel_relocs_copied *p;
2822
2823 eh = (struct elf_cris_link_hash_entry *) h;
2824
2825 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2826 if (p->section == sreloc)
2827 break;
2828
2829 if (p == NULL)
2830 {
2831 p = ((struct elf_cris_pcrel_relocs_copied *)
2832 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
2833 if (p == NULL)
2834 return FALSE;
2835 p->next = eh->pcrel_relocs_copied;
2836 eh->pcrel_relocs_copied = p;
2837 p->section = sreloc;
2838 p->count = 0;
2839 }
2840
2841 ++p->count;
2842 }
2843 break;
2844
2845 /* This relocation describes the C++ object vtable hierarchy.
2846 Reconstruct it for later use during GC. */
2847 case R_CRIS_GNU_VTINHERIT:
2848 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2849 return FALSE;
2850 break;
2851
2852 /* This relocation describes which C++ vtable entries are actually
2853 used. Record for later use during GC. */
2854 case R_CRIS_GNU_VTENTRY:
2855 BFD_ASSERT (h != NULL);
2856 if (h != NULL
2857 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2858 return FALSE;
2859 break;
2860
2861 default:
2862 /* Other relocs do not appear here. */
2863 bfd_set_error (bfd_error_bad_value);
2864 return FALSE;
2865 }
2866 }
2867
2868 return TRUE;
2869 }
2870
2871 /* Set the sizes of the dynamic sections. */
2872
2873 static bfd_boolean
2874 elf_cris_size_dynamic_sections (output_bfd, info)
2875 bfd *output_bfd ATTRIBUTE_UNUSED;
2876 struct bfd_link_info *info;
2877 {
2878 bfd *dynobj;
2879 asection *s;
2880 bfd_boolean plt;
2881 bfd_boolean relocs;
2882
2883 dynobj = elf_hash_table (info)->dynobj;
2884 BFD_ASSERT (dynobj != NULL);
2885
2886 if (elf_hash_table (info)->dynamic_sections_created)
2887 {
2888 /* Set the contents of the .interp section to the interpreter. */
2889 if (info->executable)
2890 {
2891 s = bfd_get_section_by_name (dynobj, ".interp");
2892 BFD_ASSERT (s != NULL);
2893 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2894 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2895 }
2896 }
2897 else
2898 {
2899 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
2900 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2901 elf_cris_adjust_gotplt_to_got,
2902 (PTR) info);
2903
2904 /* We may have created entries in the .rela.got section.
2905 However, if we are not creating the dynamic sections, we will
2906 not actually use these entries. Reset the size of .rela.got,
2907 which will cause it to get stripped from the output file
2908 below. */
2909 s = bfd_get_section_by_name (dynobj, ".rela.got");
2910 if (s != NULL)
2911 s->size = 0;
2912 }
2913
2914 /* If this is a -Bsymbolic shared link, then we need to discard all PC
2915 relative relocs against symbols defined in a regular object. We
2916 allocated space for them in the check_relocs routine, but we will not
2917 fill them in in the relocate_section routine. We also discard space
2918 for relocs that have become for local symbols due to symbol
2919 visibility changes. For programs, we discard space for relocs for
2920 symbols not referenced by any dynamic object. */
2921 if (info->shared)
2922 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2923 elf_cris_discard_excess_dso_dynamics,
2924 (PTR) info);
2925 else
2926 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2927 elf_cris_discard_excess_program_dynamics,
2928 (PTR) info);
2929
2930 /* The check_relocs and adjust_dynamic_symbol entry points have
2931 determined the sizes of the various dynamic sections. Allocate
2932 memory for them. */
2933 plt = FALSE;
2934 relocs = FALSE;
2935 for (s = dynobj->sections; s != NULL; s = s->next)
2936 {
2937 const char *name;
2938
2939 if ((s->flags & SEC_LINKER_CREATED) == 0)
2940 continue;
2941
2942 /* It's OK to base decisions on the section name, because none
2943 of the dynobj section names depend upon the input files. */
2944 name = bfd_get_section_name (dynobj, s);
2945
2946 if (strcmp (name, ".plt") == 0)
2947 {
2948 /* Remember whether there is a PLT. */
2949 plt = s->size != 0;
2950 }
2951 else if (CONST_STRNEQ (name, ".rela"))
2952 {
2953 if (s->size != 0)
2954 {
2955 /* Remember whether there are any reloc sections other
2956 than .rela.plt. */
2957 if (strcmp (name, ".rela.plt") != 0)
2958 relocs = TRUE;
2959
2960 /* We use the reloc_count field as a counter if we need
2961 to copy relocs into the output file. */
2962 s->reloc_count = 0;
2963 }
2964 }
2965 else if (! CONST_STRNEQ (name, ".got")
2966 && strcmp (name, ".dynbss") != 0)
2967 {
2968 /* It's not one of our sections, so don't allocate space. */
2969 continue;
2970 }
2971
2972 if (s->size == 0)
2973 {
2974 /* If we don't need this section, strip it from the
2975 output file. This is mostly to handle .rela.bss and
2976 .rela.plt. We must create both sections in
2977 create_dynamic_sections, because they must be created
2978 before the linker maps input sections to output
2979 sections. The linker does that before
2980 adjust_dynamic_symbol is called, and it is that
2981 function which decides whether anything needs to go
2982 into these sections. */
2983 s->flags |= SEC_EXCLUDE;
2984 continue;
2985 }
2986
2987 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2988 continue;
2989
2990 /* Allocate memory for the section contents. We use bfd_zalloc here
2991 in case unused entries are not reclaimed before the section's
2992 contents are written out. This should not happen, but this way
2993 if it does, we will not write out garbage. For reloc sections,
2994 this will make entries have the type R_CRIS_NONE. */
2995 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2996 if (s->contents == NULL)
2997 return FALSE;
2998 }
2999
3000 if (elf_hash_table (info)->dynamic_sections_created)
3001 {
3002 /* Add some entries to the .dynamic section. We fill in the
3003 values later, in elf_cris_finish_dynamic_sections, but we
3004 must add the entries now so that we get the correct size for
3005 the .dynamic section. The DT_DEBUG entry is filled in by the
3006 dynamic linker and used by the debugger. */
3007 #define add_dynamic_entry(TAG, VAL) \
3008 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3009
3010 if (!info->shared)
3011 {
3012 if (!add_dynamic_entry (DT_DEBUG, 0))
3013 return FALSE;
3014 }
3015
3016 if (plt)
3017 {
3018 if (!add_dynamic_entry (DT_PLTGOT, 0)
3019 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3020 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3021 || !add_dynamic_entry (DT_JMPREL, 0))
3022 return FALSE;
3023 }
3024
3025 if (relocs)
3026 {
3027 if (!add_dynamic_entry (DT_RELA, 0)
3028 || !add_dynamic_entry (DT_RELASZ, 0)
3029 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3030 return FALSE;
3031 }
3032
3033 if ((info->flags & DF_TEXTREL) != 0)
3034 {
3035 if (!add_dynamic_entry (DT_TEXTREL, 0))
3036 return FALSE;
3037 info->flags |= DF_TEXTREL;
3038 }
3039 }
3040 #undef add_dynamic_entry
3041
3042 return TRUE;
3043 }
3044
3045 /* This function is called via elf_cris_link_hash_traverse if we are
3046 creating a shared object. In the -Bsymbolic case, it discards the
3047 space allocated to copy PC relative relocs against symbols which
3048 are defined in regular objects. For the normal non-symbolic case,
3049 we also discard space for relocs that have become local due to
3050 symbol visibility changes. We allocated space for them in the
3051 check_relocs routine, but we won't fill them in in the
3052 relocate_section routine. */
3053
3054 static bfd_boolean
3055 elf_cris_discard_excess_dso_dynamics (h, inf)
3056 struct elf_cris_link_hash_entry *h;
3057 PTR inf;
3058 {
3059 struct elf_cris_pcrel_relocs_copied *s;
3060 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3061
3062 if (h->root.root.type == bfd_link_hash_warning)
3063 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3064
3065 /* If a symbol has been forced local or we have found a regular
3066 definition for the symbolic link case, then we won't be needing
3067 any relocs. */
3068 if (h->root.def_regular
3069 && (h->root.forced_local
3070 || info->symbolic))
3071 {
3072 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3073 s->section->size -= s->count * sizeof (Elf32_External_Rela);
3074 }
3075
3076 return TRUE;
3077 }
3078
3079 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3080 creating a shared object. We discard space for relocs for symbols put
3081 in the .got, but which we found we do not have to resolve at run-time. */
3082
3083 static bfd_boolean
3084 elf_cris_discard_excess_program_dynamics (h, inf)
3085 struct elf_cris_link_hash_entry *h;
3086 PTR inf;
3087 {
3088 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3089
3090 if (h->root.root.type == bfd_link_hash_warning)
3091 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3092
3093 /* If we're not creating a shared library and have a symbol which is
3094 referred to by .got references, but the symbol is defined locally,
3095 (or rather, not defined by a DSO) then lose the reloc for the .got
3096 (don't allocate room for it). Likewise for relocs for something
3097 for which we create a PLT. */
3098 if (!h->root.def_dynamic
3099 || h->root.plt.refcount > 0)
3100 {
3101 if (h->root.got.refcount > 0
3102 /* The size of this section is only valid and in sync with the
3103 various reference counts if we do dynamic; don't decrement it
3104 otherwise. */
3105 && elf_hash_table (info)->dynamic_sections_created)
3106 {
3107 bfd *dynobj = elf_hash_table (info)->dynobj;
3108 asection *srelgot;
3109
3110 BFD_ASSERT (dynobj != NULL);
3111
3112 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3113
3114 BFD_ASSERT (srelgot != NULL);
3115
3116 srelgot->size -= sizeof (Elf32_External_Rela);
3117 }
3118
3119 /* If the locally-defined symbol isn't used by a DSO, then we don't
3120 have to export it as a dynamic symbol. This was already done for
3121 functions; doing this for all symbols would presumably not
3122 introduce new problems. Of course we don't do this if we're
3123 exporting all dynamic symbols. */
3124 if (! info->export_dynamic
3125 && h->root.dynindx != -1
3126 && !h->root.def_dynamic
3127 && !h->root.ref_dynamic)
3128 {
3129 h->root.dynindx = -1;
3130 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3131 h->root.dynstr_index);
3132 }
3133 }
3134
3135 return TRUE;
3136 }
3137
3138 /* Reject a file depending on presence and expectation of prefixed
3139 underscores on symbols. */
3140
3141 static bfd_boolean
3142 cris_elf_object_p (abfd)
3143 bfd *abfd;
3144 {
3145 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
3146 return FALSE;
3147
3148 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
3149 return (bfd_get_symbol_leading_char (abfd) == '_');
3150 else
3151 return (bfd_get_symbol_leading_char (abfd) == 0);
3152 }
3153
3154 /* Mark presence or absence of leading underscore. Set machine type
3155 flags from mach type. */
3156
3157 static void
3158 cris_elf_final_write_processing (abfd, linker)
3159 bfd *abfd;
3160 bfd_boolean linker ATTRIBUTE_UNUSED;
3161 {
3162 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
3163
3164 e_flags &= ~EF_CRIS_UNDERSCORE;
3165 if (bfd_get_symbol_leading_char (abfd) == '_')
3166 e_flags |= EF_CRIS_UNDERSCORE;
3167
3168 switch (bfd_get_mach (abfd))
3169 {
3170 case bfd_mach_cris_v0_v10:
3171 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
3172 break;
3173
3174 case bfd_mach_cris_v10_v32:
3175 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
3176 break;
3177
3178 case bfd_mach_cris_v32:
3179 e_flags |= EF_CRIS_VARIANT_V32;
3180 break;
3181
3182 default:
3183 _bfd_abort (__FILE__, __LINE__,
3184 _("Unexpected machine number"));
3185 }
3186
3187 elf_elfheader (abfd)->e_flags = e_flags;
3188 }
3189
3190 /* Set the mach type from e_flags value. */
3191
3192 static bfd_boolean
3193 cris_elf_set_mach_from_flags (abfd, flags)
3194 bfd *abfd;
3195 unsigned long flags;
3196 {
3197 switch (flags & EF_CRIS_VARIANT_MASK)
3198 {
3199 case EF_CRIS_VARIANT_ANY_V0_V10:
3200 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
3201 break;
3202
3203 case EF_CRIS_VARIANT_V32:
3204 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
3205 break;
3206
3207 case EF_CRIS_VARIANT_COMMON_V10_V32:
3208 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
3209 break;
3210
3211 default:
3212 /* Since we don't recognize them, we obviously can't support them
3213 with this code; we'd have to require that all future handling
3214 would be optional. */
3215 bfd_set_error (bfd_error_wrong_format);
3216 return FALSE;
3217 }
3218
3219 return TRUE;
3220 }
3221
3222 /* Display the flags field. */
3223
3224 static bfd_boolean
3225 cris_elf_print_private_bfd_data (abfd, ptr)
3226 bfd *abfd;
3227 PTR ptr;
3228 {
3229 FILE *file = (FILE *) ptr;
3230
3231 BFD_ASSERT (abfd != NULL && ptr != NULL);
3232
3233 _bfd_elf_print_private_bfd_data (abfd, ptr);
3234
3235 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3236
3237 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
3238 fprintf (file, _(" [symbols have a _ prefix]"));
3239 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3240 == EF_CRIS_VARIANT_COMMON_V10_V32)
3241 fprintf (file, _(" [v10 and v32]"));
3242 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3243 == EF_CRIS_VARIANT_V32)
3244 fprintf (file, _(" [v32]"));
3245
3246 fputc ('\n', file);
3247 return TRUE;
3248 }
3249
3250 /* Don't mix files with and without a leading underscore. */
3251
3252 static bfd_boolean
3253 cris_elf_merge_private_bfd_data (ibfd, obfd)
3254 bfd *ibfd;
3255 bfd *obfd;
3256 {
3257 int imach, omach;
3258
3259 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3260 return FALSE;
3261
3262 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3263 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3264 return TRUE;
3265
3266 imach = bfd_get_mach (ibfd);
3267
3268 if (! elf_flags_init (obfd))
3269 {
3270 /* This happens when ld starts out with a 'blank' output file. */
3271 elf_flags_init (obfd) = TRUE;
3272
3273 /* We ignore the linker-set mach, and instead set it according to
3274 the first input file. This would also happen if we could
3275 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
3276 This allows us to keep the same linker config across
3277 cris(v0..v10) and crisv32. The drawback is that we can't force
3278 the output type, which might be a sane thing to do for a
3279 v10+v32 compatibility object. */
3280 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3281 return FALSE;
3282 }
3283
3284 if (bfd_get_symbol_leading_char (ibfd)
3285 != bfd_get_symbol_leading_char (obfd))
3286 {
3287 (*_bfd_error_handler)
3288 (bfd_get_symbol_leading_char (ibfd) == '_'
3289 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
3290 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
3291 ibfd);
3292 bfd_set_error (bfd_error_bad_value);
3293 return FALSE;
3294 }
3295
3296 omach = bfd_get_mach (obfd);
3297
3298 if (imach != omach)
3299 {
3300 /* We can get an incompatible combination only if either is
3301 bfd_mach_cris_v32, and the other one isn't compatible. */
3302 if ((imach == bfd_mach_cris_v32
3303 && omach != bfd_mach_cris_v10_v32)
3304 || (omach == bfd_mach_cris_v32
3305 && imach != bfd_mach_cris_v10_v32))
3306 {
3307 (*_bfd_error_handler)
3308 ((imach == bfd_mach_cris_v32)
3309 ? _("%B contains CRIS v32 code, incompatible"
3310 " with previous objects")
3311 : _("%B contains non-CRIS-v32 code, incompatible"
3312 " with previous objects"),
3313 ibfd);
3314 bfd_set_error (bfd_error_bad_value);
3315 return FALSE;
3316 }
3317
3318 /* We don't have to check the case where the input is compatible
3319 with v10 and v32, because the output is already known to be set
3320 to the other (compatible) mach. */
3321 if (omach == bfd_mach_cris_v10_v32
3322 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3323 return FALSE;
3324 }
3325
3326 return TRUE;
3327 }
3328
3329 /* Do side-effects of e_flags copying to obfd. */
3330
3331 static bfd_boolean
3332 cris_elf_copy_private_bfd_data (ibfd, obfd)
3333 bfd *ibfd;
3334 bfd *obfd;
3335 {
3336 /* Call the base function. */
3337 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
3338 return FALSE;
3339
3340 /* If output is big-endian for some obscure reason, stop here. */
3341 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
3342 return FALSE;
3343
3344 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3345 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3346 return TRUE;
3347
3348 /* Do what we really came here for. */
3349 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
3350 }
3351
3352 static enum elf_reloc_type_class
3353 elf_cris_reloc_type_class (rela)
3354 const Elf_Internal_Rela *rela;
3355 {
3356 switch ((int) ELF32_R_TYPE (rela->r_info))
3357 {
3358 case R_CRIS_RELATIVE:
3359 return reloc_class_relative;
3360 case R_CRIS_JUMP_SLOT:
3361 return reloc_class_plt;
3362 case R_CRIS_COPY:
3363 return reloc_class_copy;
3364 default:
3365 return reloc_class_normal;
3366 }
3367 }
3368 \f
3369 #define ELF_ARCH bfd_arch_cris
3370 #define ELF_MACHINE_CODE EM_CRIS
3371 #define ELF_MAXPAGESIZE 0x2000
3372
3373 #define TARGET_LITTLE_SYM bfd_elf32_cris_vec
3374 #define TARGET_LITTLE_NAME "elf32-cris"
3375 #define elf_symbol_leading_char 0
3376
3377 #define elf_info_to_howto_rel NULL
3378 #define elf_info_to_howto cris_info_to_howto_rela
3379 #define elf_backend_relocate_section cris_elf_relocate_section
3380 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
3381 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook
3382 #define elf_backend_check_relocs cris_elf_check_relocs
3383 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
3384 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
3385
3386 #define elf_backend_can_gc_sections 1
3387 #define elf_backend_can_refcount 1
3388
3389 #define elf_backend_object_p cris_elf_object_p
3390 #define elf_backend_final_write_processing \
3391 cris_elf_final_write_processing
3392 #define bfd_elf32_bfd_print_private_bfd_data \
3393 cris_elf_print_private_bfd_data
3394 #define bfd_elf32_bfd_merge_private_bfd_data \
3395 cris_elf_merge_private_bfd_data
3396 #define bfd_elf32_bfd_copy_private_bfd_data \
3397 cris_elf_copy_private_bfd_data
3398
3399 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
3400 #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
3401
3402 #define bfd_elf32_bfd_link_hash_table_create \
3403 elf_cris_link_hash_table_create
3404 #define elf_backend_adjust_dynamic_symbol \
3405 elf_cris_adjust_dynamic_symbol
3406 #define elf_backend_size_dynamic_sections \
3407 elf_cris_size_dynamic_sections
3408 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3409 #define elf_backend_finish_dynamic_symbol \
3410 elf_cris_finish_dynamic_symbol
3411 #define elf_backend_finish_dynamic_sections \
3412 elf_cris_finish_dynamic_sections
3413 #define elf_backend_create_dynamic_sections \
3414 _bfd_elf_create_dynamic_sections
3415 #define bfd_elf32_bfd_final_link \
3416 bfd_elf_gc_common_final_link
3417 #define elf_backend_hide_symbol elf_cris_hide_symbol
3418 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
3419
3420 #define elf_backend_want_got_plt 1
3421 #define elf_backend_plt_readonly 1
3422 #define elf_backend_want_plt_sym 0
3423 #define elf_backend_got_header_size 12
3424
3425 /* Later, we my want to optimize RELA entries into REL entries for dynamic
3426 linking and libraries (if it's a win of any significance). Until then,
3427 take the easy route. */
3428 #define elf_backend_may_use_rel_p 0
3429 #define elf_backend_may_use_rela_p 1
3430 #define elf_backend_rela_normal 1
3431
3432 #include "elf32-target.h"
3433
3434 #undef TARGET_LITTLE_SYM
3435 #undef TARGET_LITTLE_NAME
3436 #undef elf_symbol_leading_char
3437
3438 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
3439 #define TARGET_LITTLE_NAME "elf32-us-cris"
3440 #define elf_symbol_leading_char '_'
3441 #undef elf32_bed
3442 #define elf32_bed elf32_us_cris_bed
3443
3444 #include "elf32-target.h"
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