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* elf-bfd.h (emum elf_object_id): Rename to elf_target_id. Add
[binutils.git] / bfd / elf32-cris.c
blob5fbaff6c8854c24ff1dee02ed476e6de617c145b
1 /* CRIS-specific support for 32-bit ELF.
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3 2010 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 #include <limits.h>
31
32 /* Forward declarations. */
33 static reloc_howto_type * cris_reloc_type_lookup
34 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
35
36 static void cris_info_to_howto_rela
37 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
38
39 static bfd_reloc_status_type cris_elf_pcrel_reloc
40 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
41
42 static bfd_boolean cris_elf_grok_prstatus
43 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
44
45 static bfd_boolean cris_elf_grok_psinfo
46 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
47
48 static bfd_boolean cris_elf_relocate_section
49 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
50 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
51
52 static bfd_reloc_status_type cris_final_link_relocate
53 PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
54 Elf_Internal_Rela *, bfd_vma));
55
56 static bfd_boolean cris_elf_object_p PARAMS ((bfd *));
57
58 static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean));
59
60 static bfd_boolean cris_elf_set_mach_from_flags
61 PARAMS ((bfd *, unsigned long int));
62
63 static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
64
65 static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
66 static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
67
68 struct elf_cris_link_hash_entry;
69 static bfd_boolean elf_cris_discard_excess_dso_dynamics
70 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
71 static bfd_boolean elf_cris_discard_excess_program_dynamics
72 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
73 static bfd_boolean elf_cris_adjust_gotplt_to_got
74 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
75 static bfd_boolean elf_cris_try_fold_plt_to_got
76 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
77 static struct bfd_hash_entry *elf_cris_link_hash_newfunc
78 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
79 static struct bfd_link_hash_table *elf_cris_link_hash_table_create
80 PARAMS ((bfd *));
81 static bfd_boolean elf_cris_adjust_dynamic_symbol
82 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
83 static bfd_boolean cris_elf_check_relocs
84 PARAMS ((bfd *, struct bfd_link_info *, asection *,
85 const Elf_Internal_Rela *));
86
87 static bfd_boolean elf_cris_size_dynamic_sections
88 PARAMS ((bfd *, struct bfd_link_info *));
89 static bfd_boolean elf_cris_finish_dynamic_symbol
90 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
91 Elf_Internal_Sym *));
92 static bfd_boolean elf_cris_finish_dynamic_sections
93 PARAMS ((bfd *, struct bfd_link_info *));
94 static void elf_cris_hide_symbol
95 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
96 static enum elf_reloc_type_class elf_cris_reloc_type_class
97 PARAMS ((const Elf_Internal_Rela *));
98
99 static reloc_howto_type cris_elf_howto_table [] =
100 {
101 /* This reloc does nothing. */
102 HOWTO (R_CRIS_NONE, /* type */
103 0, /* rightshift */
104 2, /* size (0 = byte, 1 = short, 2 = long) */
105 32, /* bitsize */
106 FALSE, /* pc_relative */
107 0, /* bitpos */
108 complain_overflow_bitfield, /* complain_on_overflow */
109 bfd_elf_generic_reloc, /* special_function */
110 "R_CRIS_NONE", /* name */
111 FALSE, /* partial_inplace */
112 0, /* src_mask */
113 0, /* dst_mask */
114 FALSE), /* pcrel_offset */
115
116 /* An 8 bit absolute relocation. */
117 HOWTO (R_CRIS_8, /* type */
118 0, /* rightshift */
119 0, /* size (0 = byte, 1 = short, 2 = long) */
120 8, /* bitsize */
121 FALSE, /* pc_relative */
122 0, /* bitpos */
123 complain_overflow_bitfield, /* complain_on_overflow */
124 bfd_elf_generic_reloc, /* special_function */
125 "R_CRIS_8", /* name */
126 FALSE, /* partial_inplace */
127 0x0000, /* src_mask */
128 0x00ff, /* dst_mask */
129 FALSE), /* pcrel_offset */
130
131 /* A 16 bit absolute relocation. */
132 HOWTO (R_CRIS_16, /* type */
133 0, /* rightshift */
134 1, /* size (0 = byte, 1 = short, 2 = long) */
135 16, /* bitsize */
136 FALSE, /* pc_relative */
137 0, /* bitpos */
138 complain_overflow_bitfield, /* complain_on_overflow */
139 bfd_elf_generic_reloc, /* special_function */
140 "R_CRIS_16", /* name */
141 FALSE, /* partial_inplace */
142 0x00000000, /* src_mask */
143 0x0000ffff, /* dst_mask */
144 FALSE), /* pcrel_offset */
145
146 /* A 32 bit absolute relocation. */
147 HOWTO (R_CRIS_32, /* type */
148 0, /* rightshift */
149 2, /* size (0 = byte, 1 = short, 2 = long) */
150 32, /* bitsize */
151 FALSE, /* pc_relative */
152 0, /* bitpos */
153 /* We don't want overflow complaints for 64-bit vma builds
154 for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
155 32-bit ELF) where sym=0xc0001234.
156 Don't do this for the PIC relocs, as we don't expect to
157 see them with large offsets. */
158 complain_overflow_dont, /* complain_on_overflow */
159 bfd_elf_generic_reloc, /* special_function */
160 "R_CRIS_32", /* name */
161 FALSE, /* partial_inplace */
162 0x00000000, /* src_mask */
163 0xffffffff, /* dst_mask */
164 FALSE), /* pcrel_offset */
165
166 /* An 8 bit PC-relative relocation. */
167 HOWTO (R_CRIS_8_PCREL, /* type */
168 0, /* rightshift */
169 0, /* size (0 = byte, 1 = short, 2 = long) */
170 8, /* bitsize */
171 TRUE, /* pc_relative */
172 0, /* bitpos */
173 complain_overflow_bitfield, /* complain_on_overflow */
174 cris_elf_pcrel_reloc, /* special_function */
175 "R_CRIS_8_PCREL", /* name */
176 FALSE, /* partial_inplace */
177 0x0000, /* src_mask */
178 0x00ff, /* dst_mask */
179 TRUE), /* pcrel_offset */
180
181 /* A 16 bit PC-relative relocation. */
182 HOWTO (R_CRIS_16_PCREL, /* type */
183 0, /* rightshift */
184 1, /* size (0 = byte, 1 = short, 2 = long) */
185 16, /* bitsize */
186 TRUE, /* pc_relative */
187 0, /* bitpos */
188 complain_overflow_bitfield, /* complain_on_overflow */
189 cris_elf_pcrel_reloc, /* special_function */
190 "R_CRIS_16_PCREL", /* name */
191 FALSE, /* partial_inplace */
192 0x00000000, /* src_mask */
193 0x0000ffff, /* dst_mask */
194 TRUE), /* pcrel_offset */
195
196 /* A 32 bit PC-relative relocation. */
197 HOWTO (R_CRIS_32_PCREL, /* type */
198 0, /* rightshift */
199 2, /* size (0 = byte, 1 = short, 2 = long) */
200 32, /* bitsize */
201 TRUE, /* pc_relative */
202 0, /* bitpos */
203 complain_overflow_bitfield, /* complain_on_overflow */
204 cris_elf_pcrel_reloc, /* special_function */
205 "R_CRIS_32_PCREL", /* name */
206 FALSE, /* partial_inplace */
207 0x00000000, /* src_mask */
208 0xffffffff, /* dst_mask */
209 TRUE), /* pcrel_offset */
210
211 /* GNU extension to record C++ vtable hierarchy. */
212 HOWTO (R_CRIS_GNU_VTINHERIT, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 0, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 NULL, /* special_function */
220 "R_CRIS_GNU_VTINHERIT", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 /* GNU extension to record C++ vtable member usage. */
227 HOWTO (R_CRIS_GNU_VTENTRY, /* type */
228 0, /* rightshift */
229 2, /* size (0 = byte, 1 = short, 2 = long) */
230 0, /* bitsize */
231 FALSE, /* pc_relative */
232 0, /* bitpos */
233 complain_overflow_dont, /* complain_on_overflow */
234 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
235 "R_CRIS_GNU_VTENTRY", /* name */
236 FALSE, /* partial_inplace */
237 0, /* src_mask */
238 0, /* dst_mask */
239 FALSE), /* pcrel_offset */
240
241 /* This is used only by the dynamic linker. The symbol should exist
242 both in the object being run and in some shared library. The
243 dynamic linker copies the data addressed by the symbol from the
244 shared library into the object, because the object being
245 run has to have the data at some particular address. */
246 HOWTO (R_CRIS_COPY, /* type */
247 0, /* rightshift */
248 2, /* size (0 = byte, 1 = short, 2 = long) */
249 32, /* bitsize */
250 FALSE, /* pc_relative */
251 0, /* bitpos */
252 complain_overflow_bitfield, /* complain_on_overflow */
253 bfd_elf_generic_reloc, /* special_function */
254 "R_CRIS_COPY", /* name */
255 FALSE, /* partial_inplace */
256 0, /* src_mask */
257 0, /* dst_mask */
258 FALSE), /* pcrel_offset */
259
260 /* Like R_CRIS_32, but used when setting global offset table entries. */
261 HOWTO (R_CRIS_GLOB_DAT, /* type */
262 0, /* rightshift */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
264 32, /* bitsize */
265 FALSE, /* pc_relative */
266 0, /* bitpos */
267 complain_overflow_bitfield, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_CRIS_GLOB_DAT", /* name */
270 FALSE, /* partial_inplace */
271 0, /* src_mask */
272 0xffffffff, /* dst_mask */
273 FALSE), /* pcrel_offset */
274
275 /* Marks a procedure linkage table entry for a symbol. */
276 HOWTO (R_CRIS_JUMP_SLOT, /* type */
277 0, /* rightshift */
278 2, /* size (0 = byte, 1 = short, 2 = long) */
279 32, /* bitsize */
280 FALSE, /* pc_relative */
281 0, /* bitpos */
282 complain_overflow_bitfield, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_CRIS_JUMP_SLOT", /* name */
285 FALSE, /* partial_inplace */
286 0, /* src_mask */
287 0, /* dst_mask */
288 FALSE), /* pcrel_offset */
289
290 /* Used only by the dynamic linker. When the object is run, this
291 longword is set to the load address of the object, plus the
292 addend. */
293 HOWTO (R_CRIS_RELATIVE, /* type */
294 0, /* rightshift */
295 2, /* size (0 = byte, 1 = short, 2 = long) */
296 32, /* bitsize */
297 FALSE, /* pc_relative */
298 0, /* bitpos */
299 complain_overflow_bitfield, /* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_CRIS_RELATIVE", /* name */
302 FALSE, /* partial_inplace */
303 0, /* src_mask */
304 0xffffffff, /* dst_mask */
305 FALSE), /* pcrel_offset */
306
307 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
308 HOWTO (R_CRIS_16_GOT, /* type */
309 0, /* rightshift */
310 1, /* size (0 = byte, 1 = short, 2 = long) */
311 16, /* bitsize */
312 FALSE, /* pc_relative */
313 0, /* bitpos */
314 complain_overflow_bitfield, /* complain_on_overflow */
315 bfd_elf_generic_reloc, /* special_function */
316 "R_CRIS_16_GOT", /* name */
317 FALSE, /* partial_inplace */
318 0, /* src_mask */
319 0xffff, /* dst_mask */
320 FALSE), /* pcrel_offset */
321
322 HOWTO (R_CRIS_32_GOT, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 32, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_bitfield, /* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_CRIS_32_GOT", /* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0xffffffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
337 the GOT table for the symbol. */
338 HOWTO (R_CRIS_16_GOTPLT, /* type */
339 0, /* rightshift */
340 1, /* size (0 = byte, 1 = short, 2 = long) */
341 16, /* bitsize */
342 FALSE, /* pc_relative */
343 0, /* bitpos */
344 complain_overflow_bitfield, /* complain_on_overflow */
345 bfd_elf_generic_reloc, /* special_function */
346 "R_CRIS_16_GOTPLT", /* name */
347 FALSE, /* partial_inplace */
348 0, /* src_mask */
349 0xffff, /* dst_mask */
350 FALSE), /* pcrel_offset */
351
352 HOWTO (R_CRIS_32_GOTPLT, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 32, /* bitsize */
356 FALSE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_bitfield, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_CRIS_32_GOTPLT", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xffffffff, /* dst_mask */
364 FALSE), /* pcrel_offset */
365
366 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
367 be necessary. */
368 HOWTO (R_CRIS_32_GOTREL, /* type */
369 0, /* rightshift */
370 2, /* size (0 = byte, 1 = short, 2 = long) */
371 32, /* bitsize */
372 FALSE, /* pc_relative */
373 0, /* bitpos */
374 complain_overflow_bitfield, /* complain_on_overflow */
375 bfd_elf_generic_reloc, /* special_function */
376 "R_CRIS_32_GOTREL", /* name */
377 FALSE, /* partial_inplace */
378 0, /* src_mask */
379 0xffffffff, /* dst_mask */
380 FALSE), /* pcrel_offset */
381
382 /* A 32-bit offset from GOT to entry for this symbol in PLT and request
383 to create PLT entry for symbol. */
384 HOWTO (R_CRIS_32_PLT_GOTREL, /* type */
385 0, /* rightshift */
386 2, /* size (0 = byte, 1 = short, 2 = long) */
387 32, /* bitsize */
388 FALSE, /* pc_relative */
389 0, /* bitpos */
390 complain_overflow_bitfield, /* complain_on_overflow */
391 bfd_elf_generic_reloc, /* special_function */
392 "R_CRIS_32_PLT_GOTREL", /* name */
393 FALSE, /* partial_inplace */
394 0, /* src_mask */
395 0xffffffff, /* dst_mask */
396 FALSE), /* pcrel_offset */
397
398 /* A 32-bit offset from PC (location after the relocation) + addend to
399 entry for this symbol in PLT and request to create PLT entry for
400 symbol. */
401 HOWTO (R_CRIS_32_PLT_PCREL, /* type */
402 0, /* rightshift */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
404 32, /* bitsize */
405 TRUE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_bitfield, /* complain_on_overflow */
408 cris_elf_pcrel_reloc, /* special_function */
409 "R_CRIS_32_PLT_PCREL", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0xffffffff, /* dst_mask */
413 TRUE), /* pcrel_offset */
414
415 /* We don't handle these in any special manner and cross-format
416 linking is not supported; just recognize them enough to pass them
417 around. FIXME: do the same for most PIC relocs and add sanity
418 tests to actually refuse gracefully to handle these and PIC
419 relocs for cross-format linking. */
420 #define TLSHOWTO32(name) \
421 HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \
422 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE)
423 #define TLSHOWTO16X(name, X) \
424 HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \
425 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE)
426 #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned)
427 #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed)
428
429 TLSHOWTO32 (R_CRIS_32_GOT_GD),
430 TLSHOWTO16 (R_CRIS_16_GOT_GD),
431 TLSHOWTO32 (R_CRIS_32_GD),
432 TLSHOWTO32 (R_CRIS_DTP),
433 TLSHOWTO32 (R_CRIS_32_DTPREL),
434 TLSHOWTO16S (R_CRIS_16_DTPREL),
435 TLSHOWTO32 (R_CRIS_32_GOT_TPREL),
436 TLSHOWTO16S (R_CRIS_16_GOT_TPREL),
437 TLSHOWTO32 (R_CRIS_32_TPREL),
438 TLSHOWTO16S (R_CRIS_16_TPREL),
439 TLSHOWTO32 (R_CRIS_DTPMOD),
440 TLSHOWTO32 (R_CRIS_32_IE)
441 };
442 \f
443 /* Map BFD reloc types to CRIS ELF reloc types. */
444
445 struct cris_reloc_map
446 {
447 bfd_reloc_code_real_type bfd_reloc_val;
448 unsigned int cris_reloc_val;
449 };
450
451 static const struct cris_reloc_map cris_reloc_map [] =
452 {
453 { BFD_RELOC_NONE, R_CRIS_NONE },
454 { BFD_RELOC_8, R_CRIS_8 },
455 { BFD_RELOC_16, R_CRIS_16 },
456 { BFD_RELOC_32, R_CRIS_32 },
457 { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL },
458 { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL },
459 { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL },
460 { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT },
461 { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY },
462 { BFD_RELOC_CRIS_COPY, R_CRIS_COPY },
463 { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT },
464 { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT },
465 { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE },
466 { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT },
467 { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT },
468 { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT },
469 { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT },
470 { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL },
471 { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
472 { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL },
473 { BFD_RELOC_CRIS_32_GOT_GD, R_CRIS_32_GOT_GD },
474 { BFD_RELOC_CRIS_16_GOT_GD, R_CRIS_16_GOT_GD },
475 { BFD_RELOC_CRIS_32_GD, R_CRIS_32_GD },
476 { BFD_RELOC_CRIS_DTP, R_CRIS_DTP },
477 { BFD_RELOC_CRIS_32_DTPREL, R_CRIS_32_DTPREL },
478 { BFD_RELOC_CRIS_16_DTPREL, R_CRIS_16_DTPREL },
479 { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL },
480 { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL },
481 { BFD_RELOC_CRIS_32_TPREL, R_CRIS_32_TPREL },
482 { BFD_RELOC_CRIS_16_TPREL, R_CRIS_16_TPREL },
483 { BFD_RELOC_CRIS_DTPMOD, R_CRIS_DTPMOD },
484 { BFD_RELOC_CRIS_32_IE, R_CRIS_32_IE }
485 };
486
487 static reloc_howto_type *
488 cris_reloc_type_lookup (abfd, code)
489 bfd * abfd ATTRIBUTE_UNUSED;
490 bfd_reloc_code_real_type code;
491 {
492 unsigned int i;
493
494 for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
495 if (cris_reloc_map [i].bfd_reloc_val == code)
496 return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
497
498 return NULL;
499 }
500
501 static reloc_howto_type *
502 cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
503 {
504 unsigned int i;
505
506 for (i = 0;
507 i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
508 i++)
509 if (cris_elf_howto_table[i].name != NULL
510 && strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
511 return &cris_elf_howto_table[i];
512
513 return NULL;
514 }
515
516 /* Set the howto pointer for an CRIS ELF reloc. */
517
518 static void
519 cris_info_to_howto_rela (abfd, cache_ptr, dst)
520 bfd * abfd ATTRIBUTE_UNUSED;
521 arelent * cache_ptr;
522 Elf_Internal_Rela * dst;
523 {
524 enum elf_cris_reloc_type r_type;
525
526 r_type = ELF32_R_TYPE (dst->r_info);
527 BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
528 cache_ptr->howto = & cris_elf_howto_table [r_type];
529 }
530
531 bfd_reloc_status_type
532 cris_elf_pcrel_reloc (abfd, reloc_entry, symbol, data, input_section,
533 output_bfd, error_message)
534 bfd *abfd ATTRIBUTE_UNUSED;
535 arelent *reloc_entry;
536 asymbol *symbol;
537 PTR data ATTRIBUTE_UNUSED;
538 asection *input_section;
539 bfd *output_bfd;
540 char **error_message ATTRIBUTE_UNUSED;
541 {
542 /* By default (using only bfd_elf_generic_reloc when linking to
543 non-ELF formats) PC-relative relocs are relative to the beginning
544 of the reloc. CRIS PC-relative relocs are relative to the position
545 *after* the reloc because that's what pre-CRISv32 PC points to
546 after reading an insn field with that reloc. (For CRISv32, PC is
547 actually relative to the start of the insn, but we keep the old
548 definition.) Still, we use as much generic machinery as we can.
549
550 Only adjust when doing a final link. */
551 if (output_bfd == (bfd *) NULL)
552 reloc_entry->addend -= 1 << reloc_entry->howto->size;
553
554 return
555 bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
556 input_section, output_bfd, error_message);
557 }
558 \f
559 /* Support for core dump NOTE sections.
560 The slightly unintuitive code layout is an attempt to keep at least
561 some similarities with other ports, hoping to simplify general
562 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
563
564 static bfd_boolean
565 cris_elf_grok_prstatus (abfd, note)
566 bfd *abfd;
567 Elf_Internal_Note *note;
568 {
569 int offset;
570 size_t size;
571
572 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
573 switch (note->descsz)
574 {
575 default:
576 return FALSE;
577
578 case 202: /* Linux/CRISv32 */
579 /* pr_cursig */
580 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
581
582 /* pr_pid */
583 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
584
585 /* pr_reg */
586 offset = 70;
587 size = 128;
588
589 break;
590 }
591 else
592 switch (note->descsz)
593 {
594 default:
595 return FALSE;
596
597 case 214: /* Linux/CRIS */
598 /* pr_cursig */
599 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
600
601 /* pr_pid */
602 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
603
604 /* pr_reg */
605 offset = 70;
606 size = 140;
607
608 break;
609 }
610
611 /* Make a ".reg/999" section. */
612 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
613 size, note->descpos + offset);
614 }
615
616 static bfd_boolean
617 cris_elf_grok_psinfo (abfd, note)
618 bfd *abfd;
619 Elf_Internal_Note *note;
620 {
621 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
622 switch (note->descsz)
623 {
624 default:
625 return FALSE;
626
627 case 124: /* Linux/CRISv32 elf_prpsinfo */
628 elf_tdata (abfd)->core_program
629 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
630 elf_tdata (abfd)->core_command
631 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
632 }
633 else
634 switch (note->descsz)
635 {
636 default:
637 return FALSE;
638
639 case 124: /* Linux/CRIS elf_prpsinfo */
640 elf_tdata (abfd)->core_program
641 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
642 elf_tdata (abfd)->core_command
643 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
644 }
645
646 /* Note that for some reason, a spurious space is tacked
647 onto the end of the args in some (at least one anyway)
648 implementations, so strip it off if it exists. */
649
650 {
651 char *command = elf_tdata (abfd)->core_command;
652 int n = strlen (command);
653
654 if (0 < n && command[n - 1] == ' ')
655 command[n - 1] = '\0';
656 }
657
658 return TRUE;
659 }
660 \f
661 /* The name of the dynamic interpreter. This is put in the .interp
662 section. */
663
664 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
665
666 /* The size in bytes of an entry in the procedure linkage table. */
667
668 #define PLT_ENTRY_SIZE 20
669 #define PLT_ENTRY_SIZE_V32 26
670
671 /* The first entry in an absolute procedure linkage table looks like this. */
672
673 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
674 {
675 0xfc, 0xe1,
676 0x7e, 0x7e, /* push mof. */
677 0x7f, 0x0d, /* (dip [pc+]) */
678 0, 0, 0, 0, /* Replaced with address of .got + 4. */
679 0x30, 0x7a, /* move [...],mof */
680 0x7f, 0x0d, /* (dip [pc+]) */
681 0, 0, 0, 0, /* Replaced with address of .got + 8. */
682 0x30, 0x09 /* jump [...] */
683 };
684
685 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
686 {
687 0x84, 0xe2, /* subq 4,$sp */
688 0x6f, 0xfe, /* move.d 0,$acr */
689 0, 0, 0, 0, /* Replaced by address of .got + 4. */
690 0x7e, 0x7a, /* move $mof,[$sp] */
691 0x3f, 0x7a, /* move [$acr],$mof */
692 0x04, 0xf2, /* addq 4,acr */
693 0x6f, 0xfa, /* move.d [$acr],$acr */
694 0xbf, 0x09, /* jump $acr */
695 0xb0, 0x05, /* nop */
696 0, 0 /* Pad out to 26 bytes. */
697 };
698
699 /* Subsequent entries in an absolute procedure linkage table look like
700 this. */
701
702 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
703 {
704 0x7f, 0x0d, /* (dip [pc+]) */
705 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
706 0x30, 0x09, /* jump [...] */
707 0x3f, 0x7e, /* move [pc+],mof */
708 0, 0, 0, 0, /* Replaced with offset into relocation table. */
709 0x2f, 0xfe, /* add.d [pc+],pc */
710 0xec, 0xff,
711 0xff, 0xff /* Replaced with offset to start of .plt. */
712 };
713
714 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
715 {
716 0x6f, 0xfe, /* move.d 0,$acr */
717 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
718 0x6f, 0xfa, /* move.d [$acr],$acr */
719 0xbf, 0x09, /* jump $acr */
720 0xb0, 0x05, /* nop */
721 0x3f, 0x7e, /* move 0,mof */
722 0, 0, 0, 0, /* Replaced with offset into relocation table. */
723 0xbf, 0x0e, /* ba start_of_plt0_entry */
724 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
725 0xb0, 0x05 /* nop */
726 };
727
728 /* The first entry in a PIC procedure linkage table looks like this. */
729
730 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
731 {
732 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
733 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
734 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
735 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
736 };
737
738 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
739 {
740 0x84, 0xe2, /* subq 4,$sp */
741 0x04, 0x01, /* addoq 4,$r0,$acr */
742 0x7e, 0x7a, /* move $mof,[$sp] */
743 0x3f, 0x7a, /* move [$acr],$mof */
744 0x04, 0xf2, /* addq 4,$acr */
745 0x6f, 0xfa, /* move.d [$acr],$acr */
746 0xbf, 0x09, /* jump $acr */
747 0xb0, 0x05, /* nop */
748 0, 0, /* Pad out to 26 bytes. */
749 0, 0, 0, 0,
750 0, 0, 0, 0
751 };
752
753 /* Subsequent entries in a PIC procedure linkage table look like this. */
754
755 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
756 {
757 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
758 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
759 0x30, 0x09, /* jump [...] */
760 0x3f, 0x7e, /* move [pc+],mof */
761 0, 0, 0, 0, /* Replaced with offset into relocation table. */
762 0x2f, 0xfe, /* add.d [pc+],pc */
763 0xec, 0xff, /* Replaced with offset to start of .plt. */
764 0xff, 0xff
765 };
766
767 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
768 {
769 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
770 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
771 0x6f, 0xfa, /* move.d [$acr],$acr */
772 0xbf, 0x09, /* jump $acr */
773 0xb0, 0x05, /* nop */
774 0x3f, 0x7e, /* move relocoffs,$mof */
775 0, 0, 0, 0, /* Replaced with offset into relocation table. */
776 0xbf, 0x0e, /* ba start_of_plt */
777 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
778 0xb0, 0x05 /* nop */
779 };
780 \f
781 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
782 (and most other PIC/shlib stuff). Check that we don't drift away
783 without reason.
784
785 The CRIS linker, like the m68k and i386 linkers (and probably the rest
786 too) needs to keep track of the number of relocs that it decides to
787 copy in check_relocs for each symbol. This is so that it can discard
788 PC relative relocs if it doesn't need them when linking with
789 -Bsymbolic. We store the information in a field extending the regular
790 ELF linker hash table. */
791
792 /* This structure keeps track of the number of PC relative relocs we have
793 copied for a given symbol. */
794
795 struct elf_cris_pcrel_relocs_copied
796 {
797 /* Next section. */
798 struct elf_cris_pcrel_relocs_copied *next;
799
800 /* A section in dynobj. */
801 asection *section;
802
803 /* Number of relocs copied in this section. */
804 bfd_size_type count;
805
806 /* Example of reloc being copied, for message. */
807 enum elf_cris_reloc_type r_type;
808 };
809
810 /* CRIS ELF linker hash entry. */
811
812 struct elf_cris_link_hash_entry
813 {
814 struct elf_link_hash_entry root;
815
816 /* Number of PC relative relocs copied for this symbol. */
817 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
818
819 /* The GOTPLT references are CRIS-specific; the goal is to avoid having
820 both a general GOT and a PLT-specific GOT entry for the same symbol,
821 when it is referenced both as a function and as a function pointer.
822
823 Number of GOTPLT references for a function. */
824 bfd_signed_vma gotplt_refcount;
825
826 /* Actual GOTPLT index for this symbol, if applicable, or zero if not
827 (zero is never used as an index). FIXME: We should be able to fold
828 this with gotplt_refcount in a union, like the got and plt unions in
829 elf_link_hash_entry. */
830 bfd_size_type gotplt_offset;
831
832 /* The root.got.refcount is the sum of the regular reference counts
833 (this) and those members below. We have to keep a separate count
834 to track when we've found the first (or last) reference to a
835 regular got entry. The offset is in root.got.offset. */
836 bfd_signed_vma reg_got_refcount;
837
838 /* Similar to the above, the number of reloc references to this
839 symbols that need a R_CRIS_32_TPREL slot. The offset is in
840 root.got.offset, because this and .dtp_refcount can't validly
841 happen when there's also a regular GOT entry; that's invalid
842 input for which an error is emitted. */
843 bfd_signed_vma tprel_refcount;
844
845 /* Similar to the above, the number of reloc references to this
846 symbols that need a R_CRIS_DTP slot. The offset is in
847 root.got.offset; plus 4 if .tprel_refcount > 0. */
848 bfd_signed_vma dtp_refcount;
849 };
850
851 /* The local_got_refcounts and local_got_offsets are a multiple of
852 LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
853 refcount for GOT itself, see code), with the summary / group offset
854 for local symbols located at offset N, reference counts for
855 ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
856 relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
857 3*LSNUM. */
858
859 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
860 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
861 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
862 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
863
864 /* CRIS ELF linker hash table. */
865
866 struct elf_cris_link_hash_table
867 {
868 struct elf_link_hash_table root;
869
870 /* We can't use the PLT offset and calculate to get the GOTPLT offset,
871 since we try and avoid creating GOTPLT:s when there's already a GOT.
872 Instead, we keep and update the next available index here. */
873 bfd_size_type next_gotplt_entry;
874
875 /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
876 been seen for any input; if != 0, then the constant-offset
877 R_CRIS_DTPMOD is needed for this DSO/executable. This turns
878 negative at relocation, so that we don't need an extra flag for
879 when the reloc is output. */
880 bfd_signed_vma dtpmod_refcount;
881 };
882
883 /* Traverse a CRIS ELF linker hash table. */
884
885 #define elf_cris_link_hash_traverse(table, func, info) \
886 (elf_link_hash_traverse \
887 (&(table)->root, \
888 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
889 (info)))
890
891 /* Get the CRIS ELF linker hash table from a link_info structure. */
892
893 #define elf_cris_hash_table(p) \
894 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
895 == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL)
896
897 /* Get the CRIS ELF linker hash entry from a regular hash entry (the
898 "parent class"). The .root reference is just a simple type
899 check on the argument. */
900
901 #define elf_cris_hash_entry(p) \
902 ((struct elf_cris_link_hash_entry *) (&(p)->root))
903
904 /* Create an entry in a CRIS ELF linker hash table. */
905
906 static struct bfd_hash_entry *
907 elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry,
908 struct bfd_hash_table *table,
909 const char *string)
910 {
911 struct elf_cris_link_hash_entry *ret =
912 (struct elf_cris_link_hash_entry *) entry;
913
914 /* Allocate the structure if it has not already been allocated by a
915 subclass. */
916 if (ret == (struct elf_cris_link_hash_entry *) NULL)
917 ret = ((struct elf_cris_link_hash_entry *)
918 bfd_hash_allocate (table,
919 sizeof (struct elf_cris_link_hash_entry)));
920 if (ret == (struct elf_cris_link_hash_entry *) NULL)
921 return (struct bfd_hash_entry *) ret;
922
923 /* Call the allocation method of the superclass. */
924 ret = ((struct elf_cris_link_hash_entry *)
925 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
926 table, string));
927 if (ret != (struct elf_cris_link_hash_entry *) NULL)
928 {
929 ret->pcrel_relocs_copied = NULL;
930 ret->gotplt_refcount = 0;
931 ret->gotplt_offset = 0;
932 ret->dtp_refcount = 0;
933 ret->tprel_refcount = 0;
934 ret->reg_got_refcount = 0;
935 }
936
937 return (struct bfd_hash_entry *) ret;
938 }
939
940 /* Create a CRIS ELF linker hash table. */
941
942 static struct bfd_link_hash_table *
943 elf_cris_link_hash_table_create (bfd *abfd)
944 {
945 struct elf_cris_link_hash_table *ret;
946 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
947
948 ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
949 if (ret == (struct elf_cris_link_hash_table *) NULL)
950 return NULL;
951
952 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
953 elf_cris_link_hash_newfunc,
954 sizeof (struct elf_cris_link_hash_entry),
955 CRIS_ELF_DATA))
956 {
957 free (ret);
958 return NULL;
959 }
960
961 /* Initialize to skip over the first three entries in the gotplt; they
962 are used for run-time symbol evaluation. */
963 ret->next_gotplt_entry = 12;
964
965 /* We haven't seen any R_CRIS_nn_GOT_TPREL initially. */
966 ret->dtpmod_refcount = 0;
967
968 return &ret->root.root;
969 }
970 \f
971 /* Perform a single relocation. By default we use the standard BFD
972 routines, with a few tweaks. */
973
974 static bfd_reloc_status_type
975 cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
976 relocation)
977 reloc_howto_type * howto;
978 bfd * input_bfd;
979 asection * input_section;
980 bfd_byte * contents;
981 Elf_Internal_Rela * rel;
982 bfd_vma relocation;
983 {
984 bfd_reloc_status_type r;
985 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
986
987 /* PC-relative relocations are relative to the position *after*
988 the reloc. Note that for R_CRIS_8_PCREL the adjustment is
989 not a single byte, since PC must be 16-bit-aligned. */
990 switch (r_type)
991 {
992 /* Check that the 16-bit GOT relocs are positive. */
993 case R_CRIS_16_GOTPLT:
994 case R_CRIS_16_GOT:
995 if ((bfd_signed_vma) relocation < 0)
996 return bfd_reloc_overflow;
997 break;
998
999 case R_CRIS_32_PLT_PCREL:
1000 case R_CRIS_32_PCREL:
1001 relocation -= 2;
1002 /* Fall through. */
1003 case R_CRIS_8_PCREL:
1004 case R_CRIS_16_PCREL:
1005 relocation -= 2;
1006 break;
1007
1008 default:
1009 break;
1010 }
1011
1012 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1013 contents, rel->r_offset,
1014 relocation, rel->r_addend);
1015 return r;
1016 }
1017 \f
1018
1019 /* The number of errors left before we stop outputting reloc-specific
1020 explanatory messages. By coincidence, this works nicely together
1021 with the default number of messages you'll get from LD about
1022 "relocation truncated to fit" messages before you get an
1023 "additional relocation overflows omitted from the output". */
1024 static int additional_relocation_error_msg_count = 10;
1025
1026 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
1027 copied, for further comments. */
1028
1029 static bfd_boolean
1030 cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
1031 struct bfd_link_info *info,
1032 bfd *input_bfd,
1033 asection *input_section,
1034 bfd_byte *contents,
1035 Elf_Internal_Rela *relocs,
1036 Elf_Internal_Sym *local_syms,
1037 asection **local_sections)
1038 {
1039 struct elf_cris_link_hash_table * htab;
1040 bfd *dynobj;
1041 Elf_Internal_Shdr *symtab_hdr;
1042 struct elf_link_hash_entry **sym_hashes;
1043 bfd_vma *local_got_offsets;
1044 asection *sgot;
1045 asection *splt;
1046 asection *sreloc;
1047 Elf_Internal_Rela *rel;
1048 Elf_Internal_Rela *relend;
1049 asection *srelgot;
1050
1051 htab = elf_cris_hash_table (info);
1052 if (htab == NULL)
1053 return FALSE;
1054
1055 dynobj = elf_hash_table (info)->dynobj;
1056 local_got_offsets = elf_local_got_offsets (input_bfd);
1057 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1058 sym_hashes = elf_sym_hashes (input_bfd);
1059 relend = relocs + input_section->reloc_count;
1060
1061 sgot = NULL;
1062 splt = NULL;
1063 sreloc = NULL;
1064 srelgot = NULL;
1065
1066 if (dynobj != NULL)
1067 {
1068 splt = bfd_get_section_by_name (dynobj, ".plt");
1069 sgot = bfd_get_section_by_name (dynobj, ".got");
1070 }
1071
1072 for (rel = relocs; rel < relend; rel ++)
1073 {
1074 reloc_howto_type *howto;
1075 unsigned long r_symndx;
1076 Elf_Internal_Sym *sym;
1077 asection *sec;
1078 struct elf_link_hash_entry *h;
1079 bfd_vma relocation;
1080 bfd_reloc_status_type r;
1081 const char *symname = NULL;
1082 enum elf_cris_reloc_type r_type;
1083
1084 r_type = ELF32_R_TYPE (rel->r_info);
1085
1086 if ( r_type == R_CRIS_GNU_VTINHERIT
1087 || r_type == R_CRIS_GNU_VTENTRY)
1088 continue;
1089
1090 r_symndx = ELF32_R_SYM (rel->r_info);
1091 howto = cris_elf_howto_table + r_type;
1092 h = NULL;
1093 sym = NULL;
1094 sec = NULL;
1095
1096 if (r_symndx < symtab_hdr->sh_info)
1097 {
1098 sym = local_syms + r_symndx;
1099 sec = local_sections [r_symndx];
1100 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1101
1102 symname = (bfd_elf_string_from_elf_section
1103 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1104 if (symname == NULL)
1105 symname = bfd_section_name (input_bfd, sec);
1106 }
1107 else
1108 {
1109 bfd_boolean warned;
1110 bfd_boolean unresolved_reloc;
1111
1112 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1113 r_symndx, symtab_hdr, sym_hashes,
1114 h, sec, relocation,
1115 unresolved_reloc, warned);
1116
1117 symname = h->root.root.string;
1118
1119 if (unresolved_reloc
1120 /* Perhaps we should detect the cases that
1121 sec->output_section is expected to be NULL like i386 and
1122 m68k, but apparently (and according to elfxx-ia64.c) all
1123 valid cases are where the symbol is defined in a shared
1124 object which we link dynamically against. This includes
1125 PLT relocs for which we've created a PLT entry and other
1126 relocs for which we're prepared to create dynamic
1127 relocations.
1128
1129 For now, new situations cause us to just err when
1130 sec->output_offset is NULL but the object with the symbol
1131 is *not* dynamically linked against. Thus this will
1132 automatically remind us so we can see if there are other
1133 valid cases we need to revisit. */
1134 && (sec->owner->flags & DYNAMIC) != 0)
1135 relocation = 0;
1136
1137 else if (h->root.type == bfd_link_hash_defined
1138 || h->root.type == bfd_link_hash_defweak)
1139 {
1140 /* Here follow the cases where the relocation value must
1141 be zero (or when further handling is simplified when
1142 zero). I can't claim to understand the various
1143 conditions and they weren't described in the files
1144 where I copied them from (elf32-m68k.c and
1145 elf32-i386.c), but let's mention examples of where
1146 they happen. FIXME: Perhaps define and use a
1147 dynamic_symbol_p function like ia64.
1148
1149 - When creating a shared library, we can have an
1150 ordinary relocation for a symbol defined in a shared
1151 library (perhaps the one we create). We then make
1152 the relocation value zero, as the value seen now will
1153 be added into the relocation addend in this shared
1154 library, but must be handled only at dynamic-link
1155 time. FIXME: Not sure this example covers the
1156 h->elf_link_hash_flags test, though it's there in
1157 other targets. */
1158 if (info->shared
1159 && ((! info->symbolic && h->dynindx != -1)
1160 || !h->def_regular)
1161 && (input_section->flags & SEC_ALLOC) != 0
1162 && (r_type == R_CRIS_8
1163 || r_type == R_CRIS_16
1164 || r_type == R_CRIS_32
1165 || r_type == R_CRIS_8_PCREL
1166 || r_type == R_CRIS_16_PCREL
1167 || r_type == R_CRIS_32_PCREL))
1168 relocation = 0;
1169 else if (!info->relocatable && unresolved_reloc)
1170 {
1171 _bfd_error_handler
1172 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1173 input_bfd,
1174 input_section,
1175 cris_elf_howto_table[r_type].name,
1176 symname);
1177 bfd_set_error (bfd_error_bad_value);
1178 return FALSE;
1179 }
1180 }
1181 }
1182
1183 if (sec != NULL && elf_discarded_section (sec))
1184 {
1185 /* For relocs against symbols from removed linkonce sections,
1186 or sections discarded by a linker script, we just want the
1187 section contents zeroed. Avoid any special processing. */
1188 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1189 rel->r_info = 0;
1190 rel->r_addend = 0;
1191 continue;
1192 }
1193
1194 if (info->relocatable)
1195 continue;
1196
1197 switch (r_type)
1198 {
1199 case R_CRIS_16_GOTPLT:
1200 case R_CRIS_32_GOTPLT:
1201 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1202 but we require a PLT, and the PLT handling will take care of
1203 filling in the PLT-specific GOT entry. For the GOT offset,
1204 calculate it as we do when filling it in for the .got.plt
1205 section. If we don't have a PLT, punt to GOT handling. */
1206 if (h != NULL
1207 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1208 {
1209 asection *sgotplt
1210 = bfd_get_section_by_name (dynobj, ".got.plt");
1211 bfd_vma got_offset;
1212
1213 BFD_ASSERT (h->dynindx != -1);
1214 BFD_ASSERT (sgotplt != NULL);
1215
1216 got_offset
1217 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1218
1219 relocation = got_offset;
1220 break;
1221 }
1222
1223 /* We didn't make a PLT entry for this symbol. Maybe everything is
1224 folded into the GOT. Other than folding, this happens when
1225 statically linking PIC code, or when using -Bsymbolic. Check
1226 that we instead have a GOT entry as done for us by
1227 elf_cris_adjust_dynamic_symbol, and drop through into the
1228 ordinary GOT cases. This must not happen for the
1229 executable, because any reference it does to a function
1230 that is satisfied by a DSO must generate a PLT. We assume
1231 these call-specific relocs don't address non-functions. */
1232 if (h != NULL
1233 && (h->got.offset == (bfd_vma) -1
1234 || (!info->shared
1235 && !(h->def_regular
1236 || (!h->def_dynamic
1237 && h->root.type == bfd_link_hash_undefweak)))))
1238 {
1239 (*_bfd_error_handler)
1240 ((h->got.offset == (bfd_vma) -1)
1241 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1242 " against symbol `%s'")
1243 : _("%B, section %A: No PLT for relocation %s"
1244 " against symbol `%s'"),
1245 input_bfd,
1246 input_section,
1247 cris_elf_howto_table[r_type].name,
1248 (symname != NULL && symname[0] != '\0'
1249 ? symname : _("[whose name is lost]")));
1250
1251 /* FIXME: Perhaps blaming input is not the right thing to
1252 do; this is probably an internal error. But it is true
1253 that we didn't like that particular input. */
1254 bfd_set_error (bfd_error_bad_value);
1255 return FALSE;
1256 }
1257 /* Fall through. */
1258
1259 /* The size of the actual relocation is not used here; we only
1260 fill in the GOT table here. */
1261 case R_CRIS_16_GOT:
1262 case R_CRIS_32_GOT:
1263 {
1264 bfd_vma off;
1265
1266 /* Note that despite using RELA relocations, the .got contents
1267 is always filled in with the link-relative relocation
1268 value; the addend. */
1269
1270 if (h != NULL)
1271 {
1272 off = h->got.offset;
1273 BFD_ASSERT (off != (bfd_vma) -1);
1274
1275 if (!elf_hash_table (info)->dynamic_sections_created
1276 || (! info->shared
1277 && (h->def_regular
1278 || h->type == STT_FUNC
1279 || h->needs_plt))
1280 || (info->shared
1281 && (info->symbolic || h->dynindx == -1)
1282 && h->def_regular))
1283 {
1284 /* This wasn't checked above for ! info->shared, but
1285 must hold there if we get here; the symbol must
1286 be defined in the regular program or be undefweak
1287 or be a function or otherwise need a PLT. */
1288 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1289 || info->shared
1290 || h->def_regular
1291 || h->type == STT_FUNC
1292 || h->needs_plt
1293 || h->root.type == bfd_link_hash_undefweak);
1294
1295 /* This is actually a static link, or it is a
1296 -Bsymbolic link and the symbol is defined locally,
1297 or is undefweak, or the symbol was forced to be
1298 local because of a version file, or we're not
1299 creating a dynamic object. We must initialize this
1300 entry in the global offset table. Since the offset
1301 must always be a multiple of 4, we use the least
1302 significant bit to record whether we have
1303 initialized it already.
1304
1305 If this GOT entry should be runtime-initialized, we
1306 will create a .rela.got relocation entry to
1307 initialize the value. This is done in the
1308 finish_dynamic_symbol routine. */
1309 if ((off & 1) != 0)
1310 off &= ~1;
1311 else
1312 {
1313 bfd_put_32 (output_bfd, relocation,
1314 sgot->contents + off);
1315 h->got.offset |= 1;
1316 }
1317 }
1318 }
1319 else
1320 {
1321 BFD_ASSERT (local_got_offsets != NULL
1322 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1323
1324 off = local_got_offsets[r_symndx];
1325
1326 /* The offset must always be a multiple of 4. We use
1327 the least significant bit to record whether we have
1328 already generated the necessary reloc. */
1329 if ((off & 1) != 0)
1330 off &= ~1;
1331 else
1332 {
1333 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1334
1335 if (info->shared)
1336 {
1337 Elf_Internal_Rela outrel;
1338 bfd_byte *loc;
1339
1340 if (srelgot == NULL)
1341 srelgot
1342 = bfd_get_section_by_name (dynobj, ".rela.got");
1343 BFD_ASSERT (srelgot != NULL);
1344
1345 outrel.r_offset = (sgot->output_section->vma
1346 + sgot->output_offset
1347 + off);
1348 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1349 outrel.r_addend = relocation;
1350 loc = srelgot->contents;
1351 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1352 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1353 }
1354
1355 local_got_offsets[r_symndx] |= 1;
1356 }
1357 }
1358
1359 relocation = sgot->output_offset + off;
1360 if (rel->r_addend != 0)
1361 {
1362 /* We can't do anything for a relocation which is against
1363 a symbol *plus offset*. GOT holds relocations for
1364 symbols. Make this an error; the compiler isn't
1365 allowed to pass us these kinds of things. */
1366 if (h == NULL)
1367 (*_bfd_error_handler)
1368 (_("%B, section %A: relocation %s with non-zero addend %d"
1369 " against local symbol"),
1370 input_bfd,
1371 input_section,
1372 cris_elf_howto_table[r_type].name,
1373 rel->r_addend);
1374 else
1375 (*_bfd_error_handler)
1376 (_("%B, section %A: relocation %s with non-zero addend %d"
1377 " against symbol `%s'"),
1378 input_bfd,
1379 input_section,
1380 cris_elf_howto_table[r_type].name,
1381 rel->r_addend,
1382 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1383
1384 bfd_set_error (bfd_error_bad_value);
1385 return FALSE;
1386 }
1387 }
1388 break;
1389
1390 case R_CRIS_32_GOTREL:
1391 /* This relocation must only be performed against local symbols.
1392 It's also ok when we link a program and the symbol is either
1393 defined in an ordinary (non-DSO) object or is undefined weak. */
1394 if (h != NULL
1395 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1396 && !(!info->shared
1397 && (h->def_regular
1398 || (!h->def_dynamic
1399 && h->root.type == bfd_link_hash_undefweak))))
1400 {
1401 (*_bfd_error_handler)
1402 (_("%B, section %A: relocation %s is"
1403 " not allowed for global symbol: `%s'"),
1404 input_bfd,
1405 input_section,
1406 cris_elf_howto_table[r_type].name,
1407 symname);
1408 bfd_set_error (bfd_error_bad_value);
1409 return FALSE;
1410 }
1411
1412 /* This can happen if we get a link error with the input ELF
1413 variant mismatching the output variant. Emit an error so
1414 it's noticed if it happens elsewhere. */
1415 if (sgot == NULL)
1416 {
1417 (*_bfd_error_handler)
1418 (_("%B, section %A: relocation %s with no GOT created"),
1419 input_bfd,
1420 input_section,
1421 cris_elf_howto_table[r_type].name);
1422 bfd_set_error (bfd_error_bad_value);
1423 return FALSE;
1424 }
1425
1426 /* This relocation is like a PC-relative one, except the
1427 reference point is the location of GOT. Note that
1428 sgot->output_offset is not involved in this calculation. We
1429 always want the start of entire .got section, not the
1430 position after the reserved header. */
1431 relocation -= sgot->output_section->vma;
1432 break;
1433
1434 case R_CRIS_32_PLT_PCREL:
1435 /* Relocation is to the entry for this symbol in the
1436 procedure linkage table. */
1437
1438 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1439 without using the procedure linkage table. */
1440 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1441 break;
1442
1443 if (h->plt.offset == (bfd_vma) -1
1444 || splt == NULL)
1445 {
1446 /* We didn't make a PLT entry for this symbol. This
1447 happens when statically linking PIC code, or when
1448 using -Bsymbolic. */
1449 break;
1450 }
1451
1452 relocation = (splt->output_section->vma
1453 + splt->output_offset
1454 + h->plt.offset);
1455 break;
1456
1457 case R_CRIS_32_PLT_GOTREL:
1458 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1459 start of the .got section. See also comment at
1460 R_CRIS_32_GOT. */
1461 relocation -= sgot->output_section->vma;
1462
1463 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1464 without using the procedure linkage table. */
1465 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1466 break;
1467
1468 if (h->plt.offset == (bfd_vma) -1
1469 || splt == NULL)
1470 {
1471 /* We didn't make a PLT entry for this symbol. This
1472 happens when statically linking PIC code, or when
1473 using -Bsymbolic. */
1474 break;
1475 }
1476
1477 relocation = (splt->output_section->vma
1478 + splt->output_offset
1479 + h->plt.offset
1480 - sgot->output_section->vma);
1481 break;
1482
1483 case R_CRIS_8_PCREL:
1484 case R_CRIS_16_PCREL:
1485 case R_CRIS_32_PCREL:
1486 /* If the symbol was local, we need no shlib-specific handling. */
1487 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1488 || h->dynindx == -1)
1489 break;
1490
1491 /* Fall through. */
1492 case R_CRIS_8:
1493 case R_CRIS_16:
1494 case R_CRIS_32:
1495 if (info->shared
1496 && r_symndx != 0
1497 && (input_section->flags & SEC_ALLOC) != 0
1498 && ((r_type != R_CRIS_8_PCREL
1499 && r_type != R_CRIS_16_PCREL
1500 && r_type != R_CRIS_32_PCREL)
1501 || (!info->symbolic
1502 || (h != NULL && !h->def_regular))))
1503 {
1504 Elf_Internal_Rela outrel;
1505 bfd_byte *loc;
1506 bfd_boolean skip, relocate;
1507
1508 /* When generating a shared object, these relocations
1509 are copied into the output file to be resolved at run
1510 time. */
1511
1512 if (sreloc == NULL)
1513 {
1514 sreloc = _bfd_elf_get_dynamic_reloc_section
1515 (input_bfd, input_section, /*rela?*/ TRUE);
1516 /* The section should have been created in cris_elf_check_relocs,
1517 but that function will not be called for objects which fail in
1518 cris_elf_merge_private_bfd_data. */
1519 if (sreloc == NULL)
1520 {
1521 bfd_set_error (bfd_error_bad_value);
1522 return FALSE;
1523 }
1524 }
1525
1526 skip = FALSE;
1527 relocate = FALSE;
1528
1529 outrel.r_offset =
1530 _bfd_elf_section_offset (output_bfd, info, input_section,
1531 rel->r_offset);
1532 if (outrel.r_offset == (bfd_vma) -1)
1533 skip = TRUE;
1534 else if (outrel.r_offset == (bfd_vma) -2
1535 /* For now, undefined weak symbols with non-default
1536 visibility (yielding 0), like exception info for
1537 discarded sections, will get a R_CRIS_NONE
1538 relocation rather than no relocation, because we
1539 notice too late that the symbol doesn't need a
1540 relocation. */
1541 || (h != NULL
1542 && h->root.type == bfd_link_hash_undefweak
1543 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1544 skip = TRUE, relocate = TRUE;
1545 outrel.r_offset += (input_section->output_section->vma
1546 + input_section->output_offset);
1547
1548 if (skip)
1549 memset (&outrel, 0, sizeof outrel);
1550 /* h->dynindx may be -1 if the symbol was marked to
1551 become local. */
1552 else if (h != NULL
1553 && ((! info->symbolic && h->dynindx != -1)
1554 || !h->def_regular))
1555 {
1556 BFD_ASSERT (h->dynindx != -1);
1557 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1558 outrel.r_addend = relocation + rel->r_addend;
1559 }
1560 else
1561 {
1562 outrel.r_addend = relocation + rel->r_addend;
1563
1564 if (r_type == R_CRIS_32)
1565 {
1566 relocate = TRUE;
1567 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1568 }
1569 else
1570 {
1571 long indx;
1572
1573 if (bfd_is_abs_section (sec))
1574 indx = 0;
1575 else if (sec == NULL || sec->owner == NULL)
1576 {
1577 bfd_set_error (bfd_error_bad_value);
1578 return FALSE;
1579 }
1580 else
1581 {
1582 asection *osec;
1583
1584 /* We are turning this relocation into one
1585 against a section symbol. It would be
1586 proper to subtract the symbol's value,
1587 osec->vma, from the emitted reloc addend,
1588 but ld.so expects buggy relocs. */
1589 osec = sec->output_section;
1590 indx = elf_section_data (osec)->dynindx;
1591 if (indx == 0)
1592 {
1593 osec = htab->root.text_index_section;
1594 indx = elf_section_data (osec)->dynindx;
1595 }
1596 BFD_ASSERT (indx != 0);
1597 }
1598
1599 outrel.r_info = ELF32_R_INFO (indx, r_type);
1600 }
1601 }
1602
1603 loc = sreloc->contents;
1604 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1605 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1606
1607 /* This reloc will be computed at runtime, so there's no
1608 need to do anything now, except for R_CRIS_32 relocations
1609 that have been turned into R_CRIS_RELATIVE. */
1610 if (!relocate)
1611 continue;
1612 }
1613
1614 break;
1615
1616 case R_CRIS_16_DTPREL:
1617 case R_CRIS_32_DTPREL:
1618 /* This relocation must only be performed against local
1619 symbols, or to sections that are not loadable. It's also
1620 ok when we link a program and the symbol is defined in an
1621 ordinary (non-DSO) object (if it's undefined there, we've
1622 already seen an error). */
1623 if (h != NULL
1624 && (input_section->flags & SEC_ALLOC) != 0
1625 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1626 && (info->shared
1627 || (!h->def_regular
1628 && h->root.type != bfd_link_hash_undefined)))
1629 {
1630 (*_bfd_error_handler)
1631 ((h->root.type == bfd_link_hash_undefined)
1632 /* We shouldn't get here for GCC-emitted code. */
1633 ? _("%B, section %A: relocation %s has an undefined"
1634 " reference to `%s', perhaps a declaration mixup?")
1635 : ("%B, section %A: relocation %s is"
1636 " not allowed for `%s', a global symbol with default"
1637 " visibility, perhaps a declaration mixup?"),
1638 input_bfd,
1639 input_section,
1640 cris_elf_howto_table[r_type].name,
1641 symname != NULL && symname[0] != '\0'
1642 ? symname : _("[whose name is lost]"));
1643 bfd_set_error (bfd_error_bad_value);
1644 return FALSE;
1645 }
1646
1647 BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1648 || htab->dtpmod_refcount != 0);
1649
1650 /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1651 already done so. Note that we do this in .got.plt, not
1652 in .got, as .got.plt contains the first part, still the
1653 reloc is against .got, because the linker script directs
1654 (is required to direct) them both into .got. */
1655 if (htab->dtpmod_refcount > 0
1656 && (input_section->flags & SEC_ALLOC) != 0)
1657 {
1658 asection *sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1659 BFD_ASSERT (sgotplt != NULL);
1660
1661 if (info->shared)
1662 {
1663 Elf_Internal_Rela outrel;
1664 bfd_byte *loc;
1665
1666 if (srelgot == NULL)
1667 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1668 BFD_ASSERT (srelgot != NULL);
1669 loc = srelgot->contents;
1670 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1671
1672 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1673 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1674 outrel.r_offset = (sgotplt->output_section->vma
1675 + sgotplt->output_offset
1676 + 12);
1677 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1678 outrel.r_addend = 0;
1679 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1680 }
1681 else
1682 {
1683 /* For an executable, the GOT entry contents is known. */
1684 bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1685 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1686 }
1687
1688 /* Reverse the sign to mark that we've emitted the
1689 required GOT entry. */
1690 htab->dtpmod_refcount = - htab->dtpmod_refcount;
1691 }
1692
1693 /* The relocation is the offset from the start of the module
1694 TLS block to the (local) symbol. */
1695 relocation -= elf_hash_table (info)->tls_sec == NULL
1696 ? 0 : elf_hash_table (info)->tls_sec->vma;
1697 break;
1698
1699 case R_CRIS_32_GD:
1700 if (info->shared)
1701 {
1702 bfd_set_error (bfd_error_invalid_operation);
1703
1704 /* We've already informed in cris_elf_check_relocs that
1705 this is an error. */
1706 return FALSE;
1707 }
1708 /* Fall through. */
1709
1710 case R_CRIS_16_GOT_GD:
1711 case R_CRIS_32_GOT_GD:
1712 if (rel->r_addend != 0)
1713 {
1714 /* We can't do anything for a relocation which is against a
1715 symbol *plus offset*. The GOT holds relocations for
1716 symbols. Make this an error; the compiler isn't allowed
1717 to pass us these kinds of things. */
1718 (*_bfd_error_handler)
1719 (_("%B, section %A: relocation %s with non-zero addend %d"
1720 " against symbol `%s'"),
1721 input_bfd,
1722 input_section,
1723 cris_elf_howto_table[r_type].name,
1724 rel->r_addend,
1725 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1726
1727 bfd_set_error (bfd_error_bad_value);
1728 return FALSE;
1729 }
1730
1731 if (!info->shared
1732 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1733 {
1734 /* Known contents of the GOT. */
1735 bfd_vma off;
1736
1737 /* The symbol is defined in the program, so just write
1738 (1, known_tpoffset) into the GOT. */
1739 relocation -= elf_hash_table (info)->tls_sec->vma;
1740
1741 if (h != NULL)
1742 {
1743 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1744 ? h->got.offset + 4 : h->got.offset;
1745 }
1746 else
1747 {
1748 off = local_got_offsets[r_symndx];
1749 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1750 off += 4;
1751 }
1752
1753 /* We use bit 1 of the offset as a flag for GOT entry with
1754 the R_CRIS_DTP reloc, setting it when we've emitted the
1755 GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL
1756 relocs. */
1757 if ((off & 2) == 0)
1758 {
1759 off &= ~3;
1760
1761 if (h != NULL)
1762 h->got.offset |= 2;
1763 else
1764 local_got_offsets[r_symndx] |= 2;
1765
1766 bfd_put_32 (output_bfd, 1, sgot->contents + off);
1767 bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1768 }
1769 else
1770 off &= ~3;
1771
1772 relocation = sgot->output_offset + off
1773 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1774 }
1775 else
1776 {
1777 /* Not all parts of the GOT entry are known; emit a real
1778 relocation. */
1779 bfd_vma off;
1780
1781 if (h != NULL)
1782 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1783 ? h->got.offset + 4 : h->got.offset;
1784 else
1785 {
1786 off = local_got_offsets[r_symndx];
1787 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1788 off += 4;
1789 }
1790
1791 /* See above re bit 1 and bit 0 usage. */
1792 if ((off & 2) == 0)
1793 {
1794 Elf_Internal_Rela outrel;
1795 bfd_byte *loc;
1796
1797 off &= ~3;
1798
1799 if (h != NULL)
1800 h->got.offset |= 2;
1801 else
1802 local_got_offsets[r_symndx] |= 2;
1803
1804 /* Clear the target contents of the GOT (just as a
1805 gesture; it's already cleared on allocation): this
1806 relocation is not like the other dynrelocs. */
1807 bfd_put_32 (output_bfd, 0, sgot->contents + off);
1808 bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1809
1810 if (srelgot == NULL)
1811 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1812 BFD_ASSERT (srelgot != NULL);
1813
1814 if (h != NULL && h->dynindx != -1)
1815 {
1816 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1817 relocation = 0;
1818 }
1819 else
1820 {
1821 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1822
1823 /* NULL if we had an error. */
1824 relocation -= elf_hash_table (info)->tls_sec == NULL
1825 ? 0 : elf_hash_table (info)->tls_sec->vma;
1826 }
1827
1828 outrel.r_offset = (sgot->output_section->vma
1829 + sgot->output_offset
1830 + off);
1831 outrel.r_addend = relocation;
1832 loc = srelgot->contents;
1833 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1834
1835 /* NULL if we had an error. */
1836 if (srelgot->contents != NULL)
1837 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1838 }
1839 else
1840 off &= ~3;
1841
1842 relocation = sgot->output_offset + off
1843 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1844 }
1845
1846 /* The GOT-relative offset to the GOT entry is the
1847 relocation, or for R_CRIS_32_GD, the actual address of
1848 the GOT entry. */
1849 break;
1850
1851 case R_CRIS_32_IE:
1852 if (info->shared)
1853 {
1854 bfd_set_error (bfd_error_invalid_operation);
1855
1856 /* We've already informed in cris_elf_check_relocs that
1857 this is an error. */
1858 return FALSE;
1859 }
1860 /* Fall through. */
1861
1862 case R_CRIS_32_GOT_TPREL:
1863 case R_CRIS_16_GOT_TPREL:
1864 if (rel->r_addend != 0)
1865 {
1866 /* We can't do anything for a relocation which is
1867 against a symbol *plus offset*. GOT holds
1868 relocations for symbols. Make this an error; the
1869 compiler isn't allowed to pass us these kinds of
1870 things. */
1871 (*_bfd_error_handler)
1872 (_("%B, section %A: relocation %s with non-zero addend %d"
1873 " against symbol `%s'"),
1874 input_bfd,
1875 input_section,
1876 cris_elf_howto_table[r_type].name,
1877 rel->r_addend,
1878 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1879 bfd_set_error (bfd_error_bad_value);
1880 return FALSE;
1881 }
1882
1883 if (!info->shared && (h == NULL || h->def_regular))
1884 {
1885 /* Known contents of the GOT. */
1886 bfd_vma off;
1887
1888 /* The symbol is defined in the program, so just write
1889 the -prog_tls_size+known_tpoffset into the GOT. */
1890 relocation -= elf_hash_table (info)->tls_sec->vma;
1891 relocation -= elf_hash_table (info)->tls_size;
1892
1893 if (h != NULL)
1894 off = h->got.offset;
1895 else
1896 off = local_got_offsets[r_symndx];
1897
1898 /* Bit 0 is used to mark whether we've emitted the required
1899 entry (and if needed R_CRIS_32_TPREL reloc). Bit 1
1900 is used similarly for R_CRIS_DTP, see above. */
1901 if ((off & 1) == 0)
1902 {
1903 off &= ~3;
1904
1905 if (h != NULL)
1906 h->got.offset |= 1;
1907 else
1908 local_got_offsets[r_symndx] |= 1;
1909
1910 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1911 }
1912 else
1913 off &= ~3;
1914
1915 relocation = sgot->output_offset + off
1916 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1917 }
1918 else
1919 {
1920 /* Emit a real relocation. */
1921 bfd_vma off;
1922
1923 if (h != NULL)
1924 off = h->got.offset;
1925 else
1926 off = local_got_offsets[r_symndx];
1927
1928 /* See above re usage of bit 0 and 1. */
1929 if ((off & 1) == 0)
1930 {
1931 Elf_Internal_Rela outrel;
1932 bfd_byte *loc;
1933
1934 off &= ~3;
1935
1936 if (h != NULL)
1937 h->got.offset |= 1;
1938 else
1939 local_got_offsets[r_symndx] |= 1;
1940
1941 if (srelgot == NULL)
1942 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1943 BFD_ASSERT (srelgot != NULL);
1944
1945 if (h != NULL && h->dynindx != -1)
1946 {
1947 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1948 relocation = 0;
1949 }
1950 else
1951 {
1952 outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1953
1954 /* NULL if we had an error. */
1955 relocation -= elf_hash_table (info)->tls_sec == NULL
1956 ? 0 : elf_hash_table (info)->tls_sec->vma;
1957 }
1958
1959 /* Just "define" the initial contents in some
1960 semi-logical way. */
1961 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1962
1963 outrel.r_offset = (sgot->output_section->vma
1964 + sgot->output_offset
1965 + off);
1966 outrel.r_addend = relocation;
1967 loc = srelgot->contents;
1968 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1969 /* NULL if we had an error. */
1970 if (srelgot->contents != NULL)
1971 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1972 }
1973 else
1974 off &= ~3;
1975
1976 relocation = sgot->output_offset + off
1977 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1978 }
1979
1980 /* The GOT-relative offset to the GOT entry is the relocation,
1981 or for R_CRIS_32_GD, the actual address of the GOT entry. */
1982 break;
1983
1984 case R_CRIS_16_TPREL:
1985 case R_CRIS_32_TPREL:
1986 /* This relocation must only be performed against symbols
1987 defined in an ordinary (non-DSO) object. */
1988 if (info->shared)
1989 {
1990 bfd_set_error (bfd_error_invalid_operation);
1991
1992 /* We've already informed in cris_elf_check_relocs that
1993 this is an error. */
1994 return FALSE;
1995 }
1996
1997 if (h != NULL
1998 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1999 && !(h->def_regular || ELF_COMMON_DEF_P (h))
2000 /* If it's undefined, then an error message has already
2001 been emitted. */
2002 && h->root.type != bfd_link_hash_undefined)
2003 {
2004 (*_bfd_error_handler)
2005 (_("%B, section %A: relocation %s is"
2006 " not allowed for symbol: `%s'"
2007 " which is defined outside the program,"
2008 " perhaps a declaration mixup?"),
2009 input_bfd,
2010 input_section,
2011 cris_elf_howto_table[r_type].name,
2012 symname);
2013 bfd_set_error (bfd_error_bad_value);
2014 return FALSE;
2015 }
2016
2017 /* NULL if we had an error. */
2018 relocation -= elf_hash_table (info)->tls_sec == NULL
2019 ? 0
2020 : (elf_hash_table (info)->tls_sec->vma
2021 + elf_hash_table (info)->tls_size);
2022
2023 /* The TLS-relative offset is the relocation. */
2024 break;
2025
2026 default:
2027 BFD_FAIL ();
2028 return FALSE;
2029 }
2030
2031 r = cris_final_link_relocate (howto, input_bfd, input_section,
2032 contents, rel, relocation);
2033
2034 if (r != bfd_reloc_ok)
2035 {
2036 const char * msg = (const char *) NULL;
2037
2038 switch (r)
2039 {
2040 case bfd_reloc_overflow:
2041 r = info->callbacks->reloc_overflow
2042 (info, (h ? &h->root : NULL), symname, howto->name,
2043 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
2044 if (additional_relocation_error_msg_count > 0)
2045 {
2046 additional_relocation_error_msg_count--;
2047 switch (r_type)
2048 {
2049 case R_CRIS_16_GOTPLT:
2050 case R_CRIS_16_GOT:
2051
2052 /* Not just TLS is involved here, so we make
2053 generation and message depend on -fPIC/-fpic
2054 only. */
2055 case R_CRIS_16_GOT_TPREL:
2056 case R_CRIS_16_GOT_GD:
2057 (*_bfd_error_handler)
2058 (_("(too many global variables for -fpic:"
2059 " recompile with -fPIC)"));
2060 break;
2061
2062 case R_CRIS_16_TPREL:
2063 case R_CRIS_16_DTPREL:
2064 (*_bfd_error_handler)
2065 (_("(thread-local data too big for -fpic or"
2066 " -msmall-tls: recompile with -fPIC or"
2067 " -mno-small-tls)"));
2068 break;
2069
2070 /* No known cause for overflow for other relocs. */
2071 default:
2072 break;
2073 }
2074 }
2075 break;
2076
2077 case bfd_reloc_undefined:
2078 r = info->callbacks->undefined_symbol
2079 (info, symname, input_bfd, input_section, rel->r_offset,
2080 TRUE);
2081 break;
2082
2083 case bfd_reloc_outofrange:
2084 msg = _("internal error: out of range error");
2085 break;
2086
2087 case bfd_reloc_notsupported:
2088 msg = _("internal error: unsupported relocation error");
2089 break;
2090
2091 case bfd_reloc_dangerous:
2092 msg = _("internal error: dangerous relocation");
2093 break;
2094
2095 default:
2096 msg = _("internal error: unknown error");
2097 break;
2098 }
2099
2100 if (msg)
2101 r = info->callbacks->warning
2102 (info, msg, symname, input_bfd, input_section, rel->r_offset);
2103
2104 if (! r)
2105 return FALSE;
2106 }
2107 }
2108
2109 return TRUE;
2110 }
2111 \f
2112 /* Finish up dynamic symbol handling. We set the contents of various
2113 dynamic sections here. */
2114
2115 static bfd_boolean
2116 elf_cris_finish_dynamic_symbol (bfd *output_bfd,
2117 struct bfd_link_info *info,
2118 struct elf_link_hash_entry *h,
2119 Elf_Internal_Sym *sym)
2120 {
2121 struct elf_cris_link_hash_table * htab;
2122 bfd *dynobj;
2123
2124 /* Where in the plt entry to put values. */
2125 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2126
2127 /* What offset to add to the distance to the first PLT entry for the
2128 value at plt_off3. */
2129 int plt_off3_value_bias = 4;
2130
2131 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2132 for PIC and non-PIC for v32 and pre-v32). */
2133 int plt_stub_offset = 8;
2134 int plt_entry_size = PLT_ENTRY_SIZE;
2135 const bfd_byte *plt_entry = elf_cris_plt_entry;
2136 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2137
2138 htab = elf_cris_hash_table (info);
2139 if (htab == NULL)
2140 return FALSE;
2141
2142 /* Adjust the various PLT entry offsets. */
2143 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2144 {
2145 plt_off2 = 14;
2146 plt_off3 = 20;
2147 plt_off3_value_bias = -2;
2148 plt_stub_offset = 12;
2149 plt_entry_size = PLT_ENTRY_SIZE_V32;
2150 plt_entry = elf_cris_plt_entry_v32;
2151 plt_pic_entry = elf_cris_pic_plt_entry_v32;
2152 }
2153
2154 dynobj = elf_hash_table (info)->dynobj;
2155
2156 if (h->plt.offset != (bfd_vma) -1)
2157 {
2158 asection *splt;
2159 asection *sgotplt;
2160 asection *sgot;
2161 asection *srela;
2162 bfd_vma got_base;
2163
2164 bfd_vma gotplt_offset
2165 = elf_cris_hash_entry (h)->gotplt_offset;
2166 Elf_Internal_Rela rela;
2167 bfd_byte *loc;
2168 bfd_boolean has_gotplt = gotplt_offset != 0;
2169
2170 /* Get the index in the .rela.plt relocations for the .got.plt
2171 entry that corresponds to this symbol.
2172 We have to count backwards here, and the result is only valid
2173 as an index into .rela.plt. We also have to undo the effect
2174 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2175 .got.plt) for which gotplt_offset is adjusted, because while
2176 that entry goes into .got.plt, its relocation goes into
2177 .rela.got, not .rela.plt. (It's not PLT-specific; not to be
2178 processed as part of the runtime lazy .rela.plt relocation).
2179 FIXME: There be literal constants here... */
2180 bfd_vma rela_plt_index
2181 = (htab->dtpmod_refcount != 0
2182 ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2183
2184 /* Get the offset into the .got table of the entry that corresponds
2185 to this function. Note that we embed knowledge that "incoming"
2186 .got goes after .got.plt in the output without padding (pointer
2187 aligned). However, that knowledge is present in several other
2188 places too. */
2189 bfd_vma got_offset
2190 = (has_gotplt
2191 ? gotplt_offset
2192 : h->got.offset + htab->next_gotplt_entry);
2193
2194 /* This symbol has an entry in the procedure linkage table. Set it
2195 up. */
2196
2197 BFD_ASSERT (h->dynindx != -1);
2198
2199 splt = bfd_get_section_by_name (dynobj, ".plt");
2200 sgot = bfd_get_section_by_name (dynobj, ".got");
2201 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2202 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
2203 BFD_ASSERT (splt != NULL && sgotplt != NULL
2204 && (! has_gotplt || srela != NULL));
2205
2206 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2207
2208 /* Fill in the entry in the procedure linkage table. */
2209 if (! info->shared)
2210 {
2211 memcpy (splt->contents + h->plt.offset, plt_entry,
2212 plt_entry_size);
2213
2214 /* We need to enter the absolute address of the GOT entry here. */
2215 bfd_put_32 (output_bfd, got_base + got_offset,
2216 splt->contents + h->plt.offset + plt_off1);
2217 }
2218 else
2219 {
2220 memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2221 plt_entry_size);
2222 bfd_put_32 (output_bfd, got_offset,
2223 splt->contents + h->plt.offset + plt_off1);
2224 }
2225
2226 /* Fill in the plt entry and make a relocation, if this is a "real"
2227 PLT entry. */
2228 if (has_gotplt)
2229 {
2230 /* Fill in the offset to the reloc table. */
2231 bfd_put_32 (output_bfd,
2232 rela_plt_index * sizeof (Elf32_External_Rela),
2233 splt->contents + h->plt.offset + plt_off2);
2234
2235 /* Fill in the offset to the first PLT entry, where to "jump". */
2236 bfd_put_32 (output_bfd,
2237 - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2238 splt->contents + h->plt.offset + plt_off3);
2239
2240 /* Fill in the entry in the global offset table with the address of
2241 the relocating stub. */
2242 bfd_put_32 (output_bfd,
2243 (splt->output_section->vma
2244 + splt->output_offset
2245 + h->plt.offset
2246 + plt_stub_offset),
2247 sgotplt->contents + got_offset);
2248
2249 /* Fill in the entry in the .rela.plt section. */
2250 rela.r_offset = (sgotplt->output_section->vma
2251 + sgotplt->output_offset
2252 + got_offset);
2253 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2254 rela.r_addend = 0;
2255 loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2256 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2257 }
2258
2259 if (!h->def_regular)
2260 {
2261 /* Mark the symbol as undefined, rather than as defined in
2262 the .plt section. Leave the value alone. */
2263 sym->st_shndx = SHN_UNDEF;
2264
2265 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
2266 know whether resetting the value is significant; if it really
2267 is, rather than a quirk or bug in the sparc port, then I
2268 believe we'd see this elsewhere. */
2269 /* If the symbol is weak, we do need to clear the value.
2270 Otherwise, the PLT entry would provide a definition for
2271 the symbol even if the symbol wasn't defined anywhere,
2272 and so the symbol would never be NULL. */
2273 if (!h->ref_regular_nonweak)
2274 sym->st_value = 0;
2275 }
2276 }
2277
2278 /* For an ordinary program, we emit .got relocs only for symbols that
2279 are in the dynamic-symbols table and are either defined by the
2280 program or are undefined weak symbols, or are function symbols
2281 where we do not output a PLT: the PLT reloc was output above and all
2282 references to the function symbol are redirected to the PLT. */
2283 if (h->got.offset != (bfd_vma) -1
2284 && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2285 && (info->shared
2286 || (h->dynindx != -1
2287 && h->plt.offset == (bfd_vma) -1
2288 && !h->def_regular
2289 && h->root.type != bfd_link_hash_undefweak)))
2290 {
2291 asection *sgot;
2292 asection *srela;
2293 Elf_Internal_Rela rela;
2294 bfd_byte *loc;
2295 bfd_byte *where;
2296
2297 /* This symbol has an entry in the global offset table. Set it up. */
2298
2299 sgot = bfd_get_section_by_name (dynobj, ".got");
2300 srela = bfd_get_section_by_name (dynobj, ".rela.got");
2301 BFD_ASSERT (sgot != NULL && srela != NULL);
2302
2303 rela.r_offset = (sgot->output_section->vma
2304 + sgot->output_offset
2305 + (h->got.offset &~ (bfd_vma) 1));
2306
2307 /* If this is a static link, or it is a -Bsymbolic link and the
2308 symbol is defined locally or was forced to be local because
2309 of a version file, we just want to emit a RELATIVE reloc.
2310 The entry in the global offset table will already have been
2311 initialized in the relocate_section function. */
2312 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2313 if (! elf_hash_table (info)->dynamic_sections_created
2314 || (info->shared
2315 && (info->symbolic || h->dynindx == -1)
2316 && h->def_regular))
2317 {
2318 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2319 rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2320 }
2321 else
2322 {
2323 bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2324 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2325 rela.r_addend = 0;
2326 }
2327
2328 loc = srela->contents;
2329 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2330 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2331 }
2332
2333 if (h->needs_copy)
2334 {
2335 asection *s;
2336 Elf_Internal_Rela rela;
2337 bfd_byte *loc;
2338
2339 /* This symbol needs a copy reloc. Set it up. */
2340
2341 BFD_ASSERT (h->dynindx != -1
2342 && (h->root.type == bfd_link_hash_defined
2343 || h->root.type == bfd_link_hash_defweak));
2344
2345 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2346 ".rela.bss");
2347 BFD_ASSERT (s != NULL);
2348
2349 rela.r_offset = (h->root.u.def.value
2350 + h->root.u.def.section->output_section->vma
2351 + h->root.u.def.section->output_offset);
2352 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2353 rela.r_addend = 0;
2354 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2355 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2356 }
2357
2358 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2359 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2360 || h == elf_hash_table (info)->hgot)
2361 sym->st_shndx = SHN_ABS;
2362
2363 return TRUE;
2364 }
2365 \f
2366 /* Finish up the dynamic sections. Do *not* emit relocs here, as their
2367 offsets were changed, as part of -z combreloc handling, from those we
2368 computed. */
2369
2370 static bfd_boolean
2371 elf_cris_finish_dynamic_sections (output_bfd, info)
2372 bfd *output_bfd;
2373 struct bfd_link_info *info;
2374 {
2375 bfd *dynobj;
2376 asection *sgot;
2377 asection *sdyn;
2378
2379 dynobj = elf_hash_table (info)->dynobj;
2380
2381 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2382 BFD_ASSERT (sgot != NULL);
2383 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2384
2385 if (elf_hash_table (info)->dynamic_sections_created)
2386 {
2387 asection *splt;
2388 Elf32_External_Dyn *dyncon, *dynconend;
2389
2390 splt = bfd_get_section_by_name (dynobj, ".plt");
2391 BFD_ASSERT (splt != NULL && sdyn != NULL);
2392
2393 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2394 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2395 for (; dyncon < dynconend; dyncon++)
2396 {
2397 Elf_Internal_Dyn dyn;
2398 asection *s;
2399
2400 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2401
2402 switch (dyn.d_tag)
2403 {
2404 default:
2405 break;
2406
2407 case DT_PLTGOT:
2408 s = bfd_get_section_by_name (output_bfd, ".got");
2409 BFD_ASSERT (s != NULL);
2410 dyn.d_un.d_ptr = s->vma;
2411 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2412 break;
2413
2414 case DT_JMPREL:
2415 /* Yes, we *can* have a .plt and no .plt.rela, for instance
2416 if all symbols are found in the .got (not .got.plt). */
2417 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2418 dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
2419 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2420 break;
2421
2422 case DT_PLTRELSZ:
2423 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2424 if (s == NULL)
2425 dyn.d_un.d_val = 0;
2426 else
2427 dyn.d_un.d_val = s->size;
2428 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2429 break;
2430
2431 case DT_RELASZ:
2432 /* The procedure linkage table relocs (DT_JMPREL) should
2433 not be included in the overall relocs (DT_RELA).
2434 Therefore, we override the DT_RELASZ entry here to
2435 make it not include the JMPREL relocs. Since the
2436 linker script arranges for .rela.plt to follow all
2437 other relocation sections, we don't have to worry
2438 about changing the DT_RELA entry. */
2439 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2440 if (s != NULL)
2441 dyn.d_un.d_val -= s->size;
2442 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2443 break;
2444 }
2445 }
2446
2447 /* Fill in the first entry in the procedure linkage table. */
2448 if (splt->size > 0)
2449 {
2450 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2451 {
2452 if (info->shared)
2453 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2454 PLT_ENTRY_SIZE_V32);
2455 else
2456 {
2457 memcpy (splt->contents, elf_cris_plt0_entry_v32,
2458 PLT_ENTRY_SIZE_V32);
2459 bfd_put_32 (output_bfd,
2460 sgot->output_section->vma
2461 + sgot->output_offset + 4,
2462 splt->contents + 4);
2463
2464 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2465 = PLT_ENTRY_SIZE_V32;
2466 }
2467 }
2468 else
2469 {
2470 if (info->shared)
2471 memcpy (splt->contents, elf_cris_pic_plt0_entry,
2472 PLT_ENTRY_SIZE);
2473 else
2474 {
2475 memcpy (splt->contents, elf_cris_plt0_entry,
2476 PLT_ENTRY_SIZE);
2477 bfd_put_32 (output_bfd,
2478 sgot->output_section->vma
2479 + sgot->output_offset + 4,
2480 splt->contents + 6);
2481 bfd_put_32 (output_bfd,
2482 sgot->output_section->vma
2483 + sgot->output_offset + 8,
2484 splt->contents + 14);
2485
2486 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2487 = PLT_ENTRY_SIZE;
2488 }
2489 }
2490 }
2491 }
2492
2493 /* Fill in the first three entries in the global offset table. */
2494 if (sgot->size > 0)
2495 {
2496 if (sdyn == NULL)
2497 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2498 else
2499 bfd_put_32 (output_bfd,
2500 sdyn->output_section->vma + sdyn->output_offset,
2501 sgot->contents);
2502 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2503 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2504 }
2505
2506 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2507
2508 return TRUE;
2509 }
2510 \f
2511 /* Return the section that should be marked against GC for a given
2512 relocation. */
2513
2514 static asection *
2515 cris_elf_gc_mark_hook (asection *sec,
2516 struct bfd_link_info *info,
2517 Elf_Internal_Rela *rel,
2518 struct elf_link_hash_entry *h,
2519 Elf_Internal_Sym *sym)
2520 {
2521 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2522 if (h != NULL)
2523 switch (r_type)
2524 {
2525 case R_CRIS_GNU_VTINHERIT:
2526 case R_CRIS_GNU_VTENTRY:
2527 return NULL;
2528
2529 default:
2530 break;
2531 }
2532
2533 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2534 }
2535
2536 /* Update the got entry reference counts for the section being removed. */
2537
2538 static bfd_boolean
2539 cris_elf_gc_sweep_hook (bfd *abfd,
2540 struct bfd_link_info *info,
2541 asection *sec,
2542 const Elf_Internal_Rela *relocs)
2543 {
2544 struct elf_cris_link_hash_table * htab;
2545 Elf_Internal_Shdr *symtab_hdr;
2546 struct elf_link_hash_entry **sym_hashes;
2547 bfd_signed_vma *local_got_refcounts;
2548 const Elf_Internal_Rela *rel, *relend;
2549 bfd *dynobj;
2550 asection *sgot;
2551 asection *srelgot;
2552
2553 if (info->relocatable)
2554 return TRUE;
2555
2556 dynobj = elf_hash_table (info)->dynobj;
2557 if (dynobj == NULL)
2558 return TRUE;
2559
2560 htab = elf_cris_hash_table (info);
2561 if (htab == NULL)
2562 return FALSE;
2563
2564 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2565 sym_hashes = elf_sym_hashes (abfd);
2566 local_got_refcounts = elf_local_got_refcounts (abfd);
2567
2568 sgot = bfd_get_section_by_name (dynobj, ".got");
2569 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2570
2571 relend = relocs + sec->reloc_count;
2572 for (rel = relocs; rel < relend; rel++)
2573 {
2574 unsigned long r_symndx;
2575 struct elf_link_hash_entry *h = NULL;
2576 bfd_signed_vma got_element_size = 4;
2577 bfd_signed_vma *specific_refcount = NULL;
2578 enum elf_cris_reloc_type r_type;
2579
2580 r_symndx = ELF32_R_SYM (rel->r_info);
2581 if (r_symndx >= symtab_hdr->sh_info)
2582 {
2583 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2584 while (h->root.type == bfd_link_hash_indirect
2585 || h->root.type == bfd_link_hash_warning)
2586 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2587 }
2588
2589 r_type = ELF32_R_TYPE (rel->r_info);
2590 switch (r_type)
2591 {
2592 case R_CRIS_32_GOT:
2593 case R_CRIS_16_GOT:
2594 case R_CRIS_16_GOTPLT:
2595 case R_CRIS_32_GOTPLT:
2596 specific_refcount = h != NULL
2597 ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount
2598 : &local_got_refcounts[LGOT_REG_NDX (r_symndx)];
2599 break;
2600
2601 case R_CRIS_32_GD:
2602 case R_CRIS_32_GOT_GD:
2603 case R_CRIS_16_GOT_GD:
2604 got_element_size = 8;
2605 specific_refcount = h != NULL
2606 ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount
2607 : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)];
2608 break;
2609
2610 case R_CRIS_32_IE:
2611 case R_CRIS_16_GOT_TPREL:
2612 case R_CRIS_32_GOT_TPREL:
2613 specific_refcount = h != NULL
2614 ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount
2615 : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)];
2616 break;
2617
2618 default:
2619 break;
2620 }
2621
2622 switch (r_type)
2623 {
2624 case R_CRIS_32_IE:
2625 case R_CRIS_32_GD:
2626 case R_CRIS_16_GOT_TPREL:
2627 case R_CRIS_32_GOT_TPREL:
2628 case R_CRIS_32_GOT_GD:
2629 case R_CRIS_16_GOT_GD:
2630 case R_CRIS_16_GOT:
2631 case R_CRIS_32_GOT:
2632 if (h != NULL)
2633 {
2634 /* If the counters are 0 when we got here, we've
2635 miscounted somehow somewhere, an internal error. */
2636 BFD_ASSERT (h->got.refcount > 0);
2637 --h->got.refcount;
2638
2639 BFD_ASSERT (*specific_refcount > 0);
2640 --*specific_refcount;
2641 if (*specific_refcount == 0)
2642 {
2643 /* We don't need the .got entry any more. */
2644 sgot->size -= got_element_size;
2645 srelgot->size -= sizeof (Elf32_External_Rela);
2646 }
2647 break;
2648 }
2649
2650 local_got_reloc:
2651 if (local_got_refcounts != NULL)
2652 {
2653 /* If the counters are 0 when we got here, we've
2654 miscounted somehow somewhere, an internal error. */
2655 BFD_ASSERT (local_got_refcounts[r_symndx] > 0);
2656 --local_got_refcounts[r_symndx];
2657
2658 BFD_ASSERT (*specific_refcount > 0);
2659 --*specific_refcount;
2660 if (*specific_refcount == 0)
2661 {
2662 /* We don't need the .got entry any more. */
2663 sgot->size -= got_element_size;
2664 if (info->shared)
2665 srelgot->size -= sizeof (Elf32_External_Rela);
2666 }
2667 }
2668 break;
2669
2670 case R_CRIS_16_GOTPLT:
2671 case R_CRIS_32_GOTPLT:
2672 /* For local symbols, treat these like GOT relocs. */
2673 if (h == NULL)
2674 goto local_got_reloc;
2675 /* Fall through. */
2676
2677 case R_CRIS_32_PLT_GOTREL:
2678 /* FIXME: We don't garbage-collect away the .got section. */
2679 if (local_got_refcounts != NULL)
2680 local_got_refcounts[-1]--;
2681 /* Fall through. */
2682
2683 case R_CRIS_8_PCREL:
2684 case R_CRIS_16_PCREL:
2685 case R_CRIS_32_PCREL:
2686 case R_CRIS_32_PLT_PCREL:
2687 if (h != NULL)
2688 {
2689 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2690 && h->plt.refcount > 0)
2691 --h->plt.refcount;
2692 }
2693 break;
2694
2695 case R_CRIS_32_DTPREL:
2696 /* This'd be a .dtpreld entry in e.g. debug info. */
2697 if ((sec->flags & SEC_ALLOC) == 0)
2698 break;
2699 /* Fall through. */
2700 case R_CRIS_16_DTPREL:
2701 htab->dtpmod_refcount--;
2702 if (htab->dtpmod_refcount == 0)
2703 htab->next_gotplt_entry -= 8;
2704 BFD_ASSERT (local_got_refcounts != NULL);
2705 local_got_refcounts[-1]--;
2706 break;
2707
2708 default:
2709 break;
2710 }
2711 }
2712
2713 return TRUE;
2714 }
2715
2716 /* The elf_backend_plt_sym_val hook function. */
2717
2718 static bfd_vma
2719 cris_elf_plt_sym_val (bfd_vma i, const asection *plt,
2720 const arelent *rel ATTRIBUTE_UNUSED)
2721 {
2722 bfd_size_type plt_entry_size;
2723
2724 plt_entry_size
2725 = (bfd_get_mach (plt->owner) == bfd_mach_cris_v32
2726 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2727
2728 return plt->vma + (i + 1) * plt_entry_size;
2729 }
2730
2731 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2732 entry but we found we will not create any. Called when we find we will
2733 not have any PLT for this symbol, by for example
2734 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2735 or elf_cris_size_dynamic_sections if no dynamic sections will be
2736 created (we're only linking static objects). */
2737
2738 static bfd_boolean
2739 elf_cris_adjust_gotplt_to_got (h, p)
2740 struct elf_cris_link_hash_entry *h;
2741 PTR p;
2742 {
2743 struct bfd_link_info *info = (struct bfd_link_info *) p;
2744
2745 if (h->root.root.type == bfd_link_hash_warning)
2746 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
2747
2748 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2749 if (h->gotplt_refcount <= 0)
2750 return TRUE;
2751
2752 if (h->reg_got_refcount > 0)
2753 {
2754 /* There's a GOT entry for this symbol. Just adjust the refcounts.
2755 Probably not necessary at this stage, but keeping them accurate
2756 helps avoiding surprises later. */
2757 h->root.got.refcount += h->gotplt_refcount;
2758 h->reg_got_refcount += h->gotplt_refcount;
2759 h->gotplt_refcount = 0;
2760 }
2761 else
2762 {
2763 /* No GOT entry for this symbol. We need to create one. */
2764 bfd *dynobj = elf_hash_table (info)->dynobj;
2765 asection *sgot;
2766 asection *srelgot;
2767
2768 BFD_ASSERT (dynobj != NULL);
2769 sgot = bfd_get_section_by_name (dynobj, ".got");
2770 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2771
2772 /* Put accurate refcounts there. */
2773 h->root.got.refcount += h->gotplt_refcount;
2774 h->reg_got_refcount = h->gotplt_refcount;
2775
2776 h->gotplt_refcount = 0;
2777
2778 /* We always have a .got and a .rela.got section if there were
2779 GOTPLT relocs in input. */
2780 BFD_ASSERT (sgot != NULL && srelgot != NULL);
2781
2782 /* Allocate space in the .got section. */
2783 sgot->size += 4;
2784
2785 /* Allocate relocation space. */
2786 srelgot->size += sizeof (Elf32_External_Rela);
2787 }
2788
2789 return TRUE;
2790 }
2791
2792 /* Try to fold PLT entries with GOT entries. There are two cases when we
2793 want to do this:
2794
2795 - When all PLT references are GOTPLT references, and there are GOT
2796 references, and this is not the executable. We don't have to
2797 generate a PLT at all.
2798
2799 - When there are both (ordinary) PLT references and GOT references,
2800 and this isn't the executable.
2801 We want to make the PLT reference use the ordinary GOT entry rather
2802 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2803 since the GOT entry will have to be resolved at startup anyway.
2804
2805 Though the latter case is handled when room for the PLT is allocated,
2806 not here.
2807
2808 By folding into the GOT, we may need a round-trip to a PLT in the
2809 executable for calls, a loss in performance. Still, losing a
2810 reloc is a win in size and at least in start-up time.
2811
2812 Note that this function is called before symbols are forced local by
2813 version scripts. The differing cases are handled by
2814 elf_cris_hide_symbol. */
2815
2816 static bfd_boolean
2817 elf_cris_try_fold_plt_to_got (h, p)
2818 struct elf_cris_link_hash_entry *h;
2819 PTR p;
2820 {
2821 struct bfd_link_info *info = (struct bfd_link_info *) p;
2822
2823 /* If there are no GOT references for this symbol, we can't fold any
2824 other reference so there's nothing to do. Likewise if there are no
2825 PLT references; GOTPLT references included. */
2826 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2827 return TRUE;
2828
2829 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2830 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2831
2832 if (h->gotplt_refcount == h->root.plt.refcount)
2833 {
2834 /* The only PLT references are GOTPLT references, and there are GOT
2835 references. Convert PLT to GOT references. */
2836 if (! elf_cris_adjust_gotplt_to_got (h, info))
2837 return FALSE;
2838
2839 /* Clear the PLT references, so no PLT will be created. */
2840 h->root.plt.offset = (bfd_vma) -1;
2841 }
2842
2843 return TRUE;
2844 }
2845
2846 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2847 to use a GOT entry (and create one) rather than requiring a GOTPLT
2848 entry. */
2849
2850 static void
2851 elf_cris_hide_symbol (info, h, force_local)
2852 struct bfd_link_info *info;
2853 struct elf_link_hash_entry *h;
2854 bfd_boolean force_local;
2855 {
2856 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2857
2858 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2859 }
2860
2861 /* Adjust a symbol defined by a dynamic object and referenced by a
2862 regular object. The current definition is in some section of the
2863 dynamic object, but we're not including those sections. We have to
2864 change the definition to something the rest of the link can
2865 understand. */
2866
2867 static bfd_boolean
2868 elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
2869 struct elf_link_hash_entry *h)
2870 {
2871 struct elf_cris_link_hash_table * htab;
2872 bfd *dynobj;
2873 asection *s;
2874 bfd_size_type plt_entry_size;
2875
2876 htab = elf_cris_hash_table (info);
2877 if (htab == NULL)
2878 return FALSE;
2879
2880 dynobj = elf_hash_table (info)->dynobj;
2881
2882 /* Make sure we know what is going on here. */
2883 BFD_ASSERT (dynobj != NULL
2884 && (h->needs_plt
2885 || h->u.weakdef != NULL
2886 || (h->def_dynamic
2887 && h->ref_regular
2888 && !h->def_regular)));
2889
2890 plt_entry_size
2891 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2892 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2893
2894 /* If this is a function, put it in the procedure linkage table. We
2895 will fill in the contents of the procedure linkage table later,
2896 when we know the address of the .got section. */
2897 if (h->type == STT_FUNC
2898 || h->needs_plt)
2899 {
2900 /* If we link a program (not a DSO), we'll get rid of unnecessary
2901 PLT entries; we point to the actual symbols -- even for pic
2902 relocs, because a program built with -fpic should have the same
2903 result as one built without -fpic, specifically considering weak
2904 symbols.
2905 FIXME: m68k and i386 differ here, for unclear reasons. */
2906 if (! info->shared
2907 && !h->def_dynamic)
2908 {
2909 /* This case can occur if we saw a PLT reloc in an input file,
2910 but the symbol was not defined by a dynamic object. In such
2911 a case, we don't actually need to build a procedure linkage
2912 table, and we can just do an absolute or PC reloc instead, or
2913 change a .got.plt index to a .got index for GOTPLT relocs. */
2914 BFD_ASSERT (h->needs_plt);
2915 h->needs_plt = 0;
2916 h->plt.offset = (bfd_vma) -1;
2917 return
2918 elf_cris_adjust_gotplt_to_got ((struct
2919 elf_cris_link_hash_entry *) h,
2920 info);
2921 }
2922
2923 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2924 where a pointer-equivalent symbol was unimportant (i.e. more
2925 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2926 of the PLT. We can't for the executable, because the GOT
2927 entries will point to the PLT there (and be constant). */
2928 if (info->shared
2929 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2930 h, info))
2931 return FALSE;
2932
2933 /* GC or folding may have rendered this entry unused. */
2934 if (h->plt.refcount <= 0)
2935 {
2936 h->needs_plt = 0;
2937 h->plt.offset = (bfd_vma) -1;
2938 return TRUE;
2939 }
2940
2941 /* Make sure this symbol is output as a dynamic symbol. */
2942 if (h->dynindx == -1)
2943 {
2944 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2945 return FALSE;
2946 }
2947
2948 s = bfd_get_section_by_name (dynobj, ".plt");
2949 BFD_ASSERT (s != NULL);
2950
2951 /* If this is the first .plt entry, make room for the special
2952 first entry. */
2953 if (s->size == 0)
2954 s->size += plt_entry_size;
2955
2956 /* If this symbol is not defined in a regular file, and we are
2957 not generating a shared library, then set the symbol to this
2958 location in the .plt. */
2959 if (!info->shared
2960 && !h->def_regular)
2961 {
2962 h->root.u.def.section = s;
2963 h->root.u.def.value = s->size;
2964 }
2965
2966 /* If there's already a GOT entry, use that, not a .got.plt. A
2967 GOT field still has a reference count when we get here; it's
2968 not yet changed to an offset. We can't do this for an
2969 executable, because then the reloc associated with the PLT
2970 would get a non-PLT reloc pointing to the PLT. FIXME: Move
2971 this to elf_cris_try_fold_plt_to_got. */
2972 if (info->shared && h->got.refcount > 0)
2973 {
2974 h->got.refcount += h->plt.refcount;
2975
2976 /* Mark the PLT offset to use the GOT entry by setting the low
2977 bit in the plt offset; it is always a multiple of
2978 plt_entry_size (which is at least a multiple of 2). */
2979 BFD_ASSERT ((s->size % plt_entry_size) == 0);
2980
2981 /* Change the PLT refcount to an offset. */
2982 h->plt.offset = s->size;
2983
2984 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2985 that the got entry should be used instead. */
2986 BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2987 h)->gotplt_offset == 0);
2988
2989 /* Make room for this entry. */
2990 s->size += plt_entry_size;
2991
2992 return TRUE;
2993 }
2994
2995 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2996 h->plt.offset = s->size;
2997
2998 /* Make room for this entry. */
2999 s->size += plt_entry_size;
3000
3001 /* We also need to make an entry in the .got.plt section, which
3002 will be placed in the .got section by the linker script. */
3003 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
3004 = htab->next_gotplt_entry;
3005 htab->next_gotplt_entry += 4;
3006
3007 s = bfd_get_section_by_name (dynobj, ".got.plt");
3008 BFD_ASSERT (s != NULL);
3009 s->size += 4;
3010
3011 /* We also need to make an entry in the .rela.plt section. */
3012
3013 s = bfd_get_section_by_name (dynobj, ".rela.plt");
3014 BFD_ASSERT (s != NULL);
3015 s->size += sizeof (Elf32_External_Rela);
3016
3017 return TRUE;
3018 }
3019
3020 /* Reinitialize the plt offset now that it is not used as a reference
3021 count any more. */
3022 h->plt.offset = (bfd_vma) -1;
3023
3024 /* If this is a weak symbol, and there is a real definition, the
3025 processor independent code will have arranged for us to see the
3026 real definition first, and we can just use the same value. */
3027 if (h->u.weakdef != NULL)
3028 {
3029 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3030 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3031 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3032 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3033 return TRUE;
3034 }
3035
3036 /* This is a reference to a symbol defined by a dynamic object which
3037 is not a function. */
3038
3039 /* If we are creating a shared library, we must presume that the
3040 only references to the symbol are via the global offset table.
3041 For such cases we need not do anything here; the relocations will
3042 be handled correctly by relocate_section. */
3043 if (info->shared)
3044 return TRUE;
3045
3046 /* If there are no references to this symbol that do not use the
3047 GOT, we don't need to generate a copy reloc. */
3048 if (!h->non_got_ref)
3049 return TRUE;
3050
3051 if (h->size == 0)
3052 {
3053 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
3054 h->root.root.string);
3055 return TRUE;
3056 }
3057
3058 /* We must allocate the symbol in our .dynbss section, which will
3059 become part of the .bss section of the executable. There will be
3060 an entry for this symbol in the .dynsym section. The dynamic
3061 object will contain position independent code, so all references
3062 from the dynamic object to this symbol will go through the global
3063 offset table. The dynamic linker will use the .dynsym entry to
3064 determine the address it must put in the global offset table, so
3065 both the dynamic object and the regular object will refer to the
3066 same memory location for the variable. */
3067
3068 s = bfd_get_section_by_name (dynobj, ".dynbss");
3069 BFD_ASSERT (s != NULL);
3070
3071 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
3072 copy the initial value out of the dynamic object and into the
3073 runtime process image. We need to remember the offset into the
3074 .rela.bss section we are going to use. */
3075 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3076 {
3077 asection *srel;
3078
3079 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
3080 BFD_ASSERT (srel != NULL);
3081 srel->size += sizeof (Elf32_External_Rela);
3082 h->needs_copy = 1;
3083 }
3084
3085 return _bfd_elf_adjust_dynamic_copy (h, s);
3086 }
3087
3088 /* Adjust our "subclass" elements for an indirect symbol. */
3089
3090 static void
3091 elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
3092 struct elf_link_hash_entry *dir,
3093 struct elf_link_hash_entry *ind)
3094 {
3095 struct elf_cris_link_hash_entry *edir, *eind;
3096
3097 edir = (struct elf_cris_link_hash_entry *) dir;
3098 eind = (struct elf_cris_link_hash_entry *) ind;
3099
3100 /* Only indirect symbols are replaced; we're not interested in
3101 updating any of EIND's fields for other symbols. */
3102 if (eind->root.root.type != bfd_link_hash_indirect)
3103 {
3104 /* Still, we need to copy flags for e.g. weak definitions. */
3105 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3106 return;
3107 }
3108
3109 BFD_ASSERT (edir->pcrel_relocs_copied == NULL);
3110 BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
3111
3112 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
3113 #define XMOVE(F) XMOVOPZ (F, +=, 0)
3114 XMOVOPZ (pcrel_relocs_copied, =, NULL);
3115 XMOVE (gotplt_refcount);
3116 XMOVE (gotplt_offset);
3117 XMOVE (reg_got_refcount);
3118 XMOVE (tprel_refcount);
3119 XMOVE (dtp_refcount);
3120 #undef XMOVE
3121 #undef XMOVOPZ
3122
3123 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3124 }
3125
3126 /* Look through the relocs for a section during the first phase. */
3127
3128 static bfd_boolean
3129 cris_elf_check_relocs (bfd *abfd,
3130 struct bfd_link_info *info,
3131 asection *sec,
3132 const Elf_Internal_Rela *relocs)
3133 {
3134 struct elf_cris_link_hash_table * htab;
3135 bfd *dynobj;
3136 Elf_Internal_Shdr *symtab_hdr;
3137 struct elf_link_hash_entry **sym_hashes;
3138 bfd_signed_vma *local_got_refcounts;
3139 const Elf_Internal_Rela *rel;
3140 const Elf_Internal_Rela *rel_end;
3141 asection *sgot;
3142 asection *srelgot;
3143 asection *sreloc;
3144
3145 if (info->relocatable)
3146 return TRUE;
3147
3148 htab = elf_cris_hash_table (info);
3149 if (htab == NULL)
3150 return FALSE;
3151
3152 dynobj = elf_hash_table (info)->dynobj;
3153 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3154 sym_hashes = elf_sym_hashes (abfd);
3155 local_got_refcounts = elf_local_got_refcounts (abfd);
3156
3157 sgot = NULL;
3158 srelgot = NULL;
3159 sreloc = NULL;
3160
3161 rel_end = relocs + sec->reloc_count;
3162 for (rel = relocs; rel < rel_end; rel++)
3163 {
3164 struct elf_link_hash_entry *h;
3165 unsigned long r_symndx;
3166 enum elf_cris_reloc_type r_type;
3167 bfd_signed_vma got_element_size = 4;
3168 unsigned long r_symndx_lgot = INT_MAX;
3169
3170 r_symndx = ELF32_R_SYM (rel->r_info);
3171 if (r_symndx < symtab_hdr->sh_info)
3172 {
3173 h = NULL;
3174 r_symndx_lgot = LGOT_REG_NDX (r_symndx);
3175 }
3176 else
3177 {
3178 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3179 while (h->root.type == bfd_link_hash_indirect
3180 || h->root.type == bfd_link_hash_warning)
3181 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3182 }
3183
3184 r_type = ELF32_R_TYPE (rel->r_info);
3185
3186 /* Some relocs require linker-created sections; we need to hang them
3187 on the first input bfd we found that contained dynamic relocs. */
3188 switch (r_type)
3189 {
3190 case R_CRIS_32_DTPREL:
3191 if ((sec->flags & SEC_ALLOC) == 0)
3192 /* This'd be a .dtpreld entry in e.g. debug info. We have
3193 several different switch statements below, but none of
3194 that is needed; we need no preparations for resolving
3195 R_CRIS_32_DTPREL into a non-allocated section (debug
3196 info), so let's just move on to the next
3197 relocation. */
3198 continue;
3199 /* Fall through. */
3200 case R_CRIS_16_DTPREL:
3201 /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3202 entry at index 3. */
3203 if (htab->dtpmod_refcount == 0)
3204 htab->next_gotplt_entry += 8;
3205
3206 htab->dtpmod_refcount++;
3207 /* Fall through. */
3208
3209 case R_CRIS_32_IE:
3210 case R_CRIS_32_GD:
3211 case R_CRIS_16_GOT_GD:
3212 case R_CRIS_32_GOT_GD:
3213 case R_CRIS_32_GOT_TPREL:
3214 case R_CRIS_16_GOT_TPREL:
3215 case R_CRIS_16_GOT:
3216 case R_CRIS_32_GOT:
3217 case R_CRIS_32_GOTREL:
3218 case R_CRIS_32_PLT_GOTREL:
3219 case R_CRIS_32_PLT_PCREL:
3220 case R_CRIS_16_GOTPLT:
3221 case R_CRIS_32_GOTPLT:
3222 if (dynobj == NULL)
3223 {
3224 elf_hash_table (info)->dynobj = dynobj = abfd;
3225
3226 /* We could handle this if we can get a handle on the
3227 output bfd in elf_cris_adjust_dynamic_symbol. Failing
3228 that, we must insist on dynobj being a specific mach. */
3229 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3230 {
3231 (*_bfd_error_handler)
3232 (_("%B, section %A:\n v10/v32 compatible object %s"
3233 " must not contain a PIC relocation"),
3234 abfd, sec);
3235 return FALSE;
3236 }
3237
3238 /* Create the .got section, so we can assume it's always
3239 present whenever there's a dynobj. */
3240 if (!_bfd_elf_create_got_section (dynobj, info))
3241 return FALSE;
3242 }
3243
3244 if (sgot == NULL)
3245 sgot = bfd_get_section_by_name (dynobj, ".got");
3246
3247 if (local_got_refcounts == NULL)
3248 {
3249 bfd_size_type amt;
3250
3251 /* We use index local_got_refcounts[-1] to count all
3252 GOT-relative relocations that do not have explicit
3253 GOT entries. */
3254 amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3255 amt *= sizeof (bfd_signed_vma);
3256 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3257 if (local_got_refcounts == NULL)
3258 return FALSE;
3259
3260 local_got_refcounts++;
3261 elf_local_got_refcounts (abfd) = local_got_refcounts;
3262 }
3263 break;
3264
3265 default:
3266 break;
3267 }
3268
3269 /* Some relocs require a global offset table (but perhaps not a
3270 specific GOT entry). */
3271 switch (r_type)
3272 {
3273 case R_CRIS_16_DTPREL:
3274 case R_CRIS_32_DTPREL:
3275 /* Not requesting .got.rela for an executable: the contents
3276 of the first entry is constant there. For a shared
3277 library, we need .got.rela for the R_CRIS_DTPMOD
3278 relocation at index 3. */
3279 if (!info->shared)
3280 break;
3281 /* Fall through. */
3282
3283 case R_CRIS_32_IE:
3284 case R_CRIS_32_GD:
3285 case R_CRIS_16_GOT_GD:
3286 case R_CRIS_32_GOT_GD:
3287 case R_CRIS_32_GOT_TPREL:
3288 case R_CRIS_16_GOT_TPREL:
3289 /* Fall through. */
3290
3291 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
3292 entry only for local symbols. Unfortunately, we don't know
3293 until later on if there's a version script that forces the
3294 symbol local. We must have the .rela.got section in place
3295 before we know if the symbol looks global now, so we need
3296 to treat the reloc just like for R_CRIS_16_GOT and
3297 R_CRIS_32_GOT. */
3298 case R_CRIS_16_GOTPLT:
3299 case R_CRIS_32_GOTPLT:
3300 case R_CRIS_16_GOT:
3301 case R_CRIS_32_GOT:
3302 if (srelgot == NULL
3303 && (h != NULL || info->shared))
3304 {
3305 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3306 if (srelgot == NULL)
3307 {
3308 srelgot = bfd_make_section_with_flags (dynobj,
3309 ".rela.got",
3310 (SEC_ALLOC
3311 | SEC_LOAD
3312 | SEC_HAS_CONTENTS
3313 | SEC_IN_MEMORY
3314 | SEC_LINKER_CREATED
3315 | SEC_READONLY));
3316 if (srelgot == NULL
3317 || !bfd_set_section_alignment (dynobj, srelgot, 2))
3318 return FALSE;
3319 }
3320 }
3321 break;
3322
3323 default:
3324 break;
3325 }
3326
3327 /* Warn and error for invalid input. */
3328 switch (r_type)
3329 {
3330 case R_CRIS_32_IE:
3331 case R_CRIS_32_TPREL:
3332 case R_CRIS_16_TPREL:
3333 case R_CRIS_32_GD:
3334 if (info->shared)
3335 {
3336 (*_bfd_error_handler)
3337 (_("%B, section %A:\n relocation %s not valid"
3338 " in a shared object;"
3339 " typically an option mixup, recompile with -fPIC"),
3340 abfd,
3341 sec,
3342 cris_elf_howto_table[r_type].name);
3343 /* Don't return FALSE here; we want messages for all of
3344 these and the error behavior is ungraceful
3345 anyway. */
3346 }
3347 default:
3348 break;
3349 }
3350
3351 switch (r_type)
3352 {
3353 case R_CRIS_32_GD:
3354 case R_CRIS_16_GOT_GD:
3355 case R_CRIS_32_GOT_GD:
3356 /* These are requests for tls_index entries, run-time R_CRIS_DTP. */
3357 got_element_size = 8;
3358 r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3359 break;
3360
3361 case R_CRIS_16_DTPREL:
3362 case R_CRIS_32_DTPREL:
3363 /* These two just request for the constant-index
3364 module-local tls_index-sized GOT entry, which we add
3365 elsewhere. */
3366 break;
3367
3368 case R_CRIS_32_IE:
3369 case R_CRIS_32_GOT_TPREL:
3370 case R_CRIS_16_GOT_TPREL:
3371 r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3372
3373 /* Those relocs also require that a DSO is of type
3374 Initial Exec. Like other targets, we don't reset this
3375 flag even if the relocs are GC:ed away. */
3376 if (info->shared)
3377 info->flags |= DF_STATIC_TLS;
3378 break;
3379
3380 /* Let's list the other assembler-generated TLS-relocs too,
3381 just to show that they're not forgotten. */
3382 case R_CRIS_16_TPREL:
3383 case R_CRIS_32_TPREL:
3384 default:
3385 break;
3386 }
3387
3388 switch (r_type)
3389 {
3390 case R_CRIS_16_GOTPLT:
3391 case R_CRIS_32_GOTPLT:
3392 /* Mark that we need a GOT entry if the PLT entry (and its GOT
3393 entry) is eliminated. We can only do this for a non-local
3394 symbol. */
3395 if (h != NULL)
3396 {
3397 elf_cris_hash_entry (h)->gotplt_refcount++;
3398 goto handle_gotplt_reloc;
3399 }
3400 /* If h is NULL then this is a local symbol, and we must make a
3401 GOT entry for it, so handle it like a GOT reloc. */
3402 /* Fall through. */
3403
3404 case R_CRIS_32_IE:
3405 case R_CRIS_32_GD:
3406 case R_CRIS_16_GOT_GD:
3407 case R_CRIS_32_GOT_GD:
3408 case R_CRIS_32_GOT_TPREL:
3409 case R_CRIS_16_GOT_TPREL:
3410 case R_CRIS_16_GOT:
3411 case R_CRIS_32_GOT:
3412 /* This symbol requires a global offset table entry. */
3413 if (h != NULL)
3414 {
3415 if (h->got.refcount == 0)
3416 {
3417 /* Make sure this symbol is output as a dynamic symbol. */
3418 if (h->dynindx == -1)
3419 {
3420 if (!bfd_elf_link_record_dynamic_symbol (info, h))
3421 return FALSE;
3422 }
3423 }
3424
3425 /* Update the sum of reloc counts for this symbol. */
3426 h->got.refcount++;
3427
3428 switch (r_type)
3429 {
3430 case R_CRIS_16_GOT:
3431 case R_CRIS_32_GOT:
3432 if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3433 {
3434 /* Allocate space in the .got section. */
3435 sgot->size += got_element_size;
3436 /* Allocate relocation space. */
3437 srelgot->size += sizeof (Elf32_External_Rela);
3438 }
3439 elf_cris_hash_entry (h)->reg_got_refcount++;
3440 break;
3441
3442 case R_CRIS_32_GD:
3443 case R_CRIS_16_GOT_GD:
3444 case R_CRIS_32_GOT_GD:
3445 if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3446 {
3447 /* Allocate space in the .got section. */
3448 sgot->size += got_element_size;
3449 /* Allocate relocation space. */
3450 srelgot->size += sizeof (Elf32_External_Rela);
3451 }
3452 elf_cris_hash_entry (h)->dtp_refcount++;
3453 break;
3454
3455 case R_CRIS_32_IE:
3456 case R_CRIS_32_GOT_TPREL:
3457 case R_CRIS_16_GOT_TPREL:
3458 if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3459 {
3460 /* Allocate space in the .got section. */
3461 sgot->size += got_element_size;
3462 /* Allocate relocation space. */
3463 srelgot->size += sizeof (Elf32_External_Rela);
3464 }
3465 elf_cris_hash_entry (h)->tprel_refcount++;
3466 break;
3467
3468 default:
3469 BFD_FAIL ();
3470 break;
3471 }
3472 }
3473 else
3474 {
3475 /* This is a global offset table entry for a local symbol. */
3476 if (local_got_refcounts[r_symndx_lgot] == 0)
3477 {
3478 sgot->size += got_element_size;
3479 if (info->shared)
3480 {
3481 /* If we are generating a shared object, we need
3482 to output a R_CRIS_RELATIVE reloc so that the
3483 dynamic linker can adjust this GOT entry.
3484 Similarly for non-regular got entries. */
3485 srelgot->size += sizeof (Elf32_External_Rela);
3486 }
3487 }
3488 /* Update the reloc-specific count. */
3489 local_got_refcounts[r_symndx_lgot]++;
3490
3491 /* This one is the sum of all the others. */
3492 local_got_refcounts[r_symndx]++;
3493 }
3494 break;
3495
3496 case R_CRIS_16_DTPREL:
3497 case R_CRIS_32_DTPREL:
3498 case R_CRIS_32_GOTREL:
3499 /* This reference requires a global offset table.
3500 FIXME: The actual refcount isn't used currently; the .got
3501 section can't be removed if there were any references in the
3502 input. */
3503 local_got_refcounts[-1]++;
3504 break;
3505
3506 handle_gotplt_reloc:
3507
3508 case R_CRIS_32_PLT_GOTREL:
3509 /* This reference requires a global offset table. */
3510 local_got_refcounts[-1]++;
3511 /* Fall through. */
3512
3513 case R_CRIS_32_PLT_PCREL:
3514 /* This symbol requires a procedure linkage table entry. We
3515 actually build the entry in adjust_dynamic_symbol,
3516 because this might be a case of linking PIC code which is
3517 never referenced by a dynamic object, in which case we
3518 don't need to generate a procedure linkage table entry
3519 after all. */
3520
3521 /* Beware: if we'd check for visibility of the symbol here
3522 (and not marking the need for a PLT when non-visible), we'd
3523 get into trouble with keeping handling consistent with
3524 regards to relocs found before definition and GOTPLT
3525 handling. Eliminable PLT entries will be dealt with later
3526 anyway. */
3527 if (h == NULL)
3528 continue;
3529
3530 h->needs_plt = 1;
3531 h->plt.refcount++;
3532 break;
3533
3534 case R_CRIS_8:
3535 case R_CRIS_16:
3536 case R_CRIS_32:
3537 /* Let's help debug shared library creation. Any of these
3538 relocs *can* be used in shared libs, but pages containing
3539 them cannot be shared, so they're not appropriate for
3540 common use. Don't warn for sections we don't care about,
3541 such as debug sections or non-constant sections. We
3542 can't help tables of (global) function pointers, for
3543 example, though they must be emitted in a (writable) data
3544 section to avoid having impure text sections. */
3545 if (info->shared
3546 && (sec->flags & SEC_ALLOC) != 0
3547 && (sec->flags & SEC_READONLY) != 0)
3548 {
3549 /* FIXME: How do we make this optionally a warning only? */
3550 (*_bfd_error_handler)
3551 (_("%B, section %A:\n relocation %s should not"
3552 " be used in a shared object; recompile with -fPIC"),
3553 abfd,
3554 sec,
3555 cris_elf_howto_table[r_type].name);
3556 }
3557 if (h != NULL)
3558 {
3559 h->non_got_ref = 1;
3560
3561 /* Make sure a plt entry is created for this symbol if it
3562 turns out to be a function defined by a dynamic object. */
3563 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3564 h->plt.refcount++;
3565 }
3566
3567 /* If we are creating a shared library and this is not a local
3568 symbol, we need to copy the reloc into the shared library.
3569 However when linking with -Bsymbolic and this is a global
3570 symbol which is defined in an object we are including in the
3571 link (i.e., DEF_REGULAR is set), then we can resolve the
3572 reloc directly. At this point we have not seen all the input
3573 files, so it is possible that DEF_REGULAR is not set now but
3574 will be set later (it is never cleared). In case of a weak
3575 definition, DEF_REGULAR may be cleared later by a strong
3576 definition in a shared library. We account for that
3577 possibility below by storing information in the relocs_copied
3578 field of the hash table entry. A similar situation occurs
3579 when creating shared libraries and symbol visibility changes
3580 render the symbol local. */
3581
3582 /* No need to do anything if we're not creating a shared object. */
3583 if (! info->shared)
3584 break;
3585
3586 /* We don't need to handle relocs into sections not going into
3587 the "real" output. */
3588 if ((sec->flags & SEC_ALLOC) == 0)
3589 break;
3590
3591 /* We may need to create a reloc section in the dynobj and made room
3592 for this reloc. */
3593 if (sreloc == NULL)
3594 {
3595 sreloc = _bfd_elf_make_dynamic_reloc_section
3596 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3597
3598 if (sreloc == NULL)
3599 return FALSE;
3600 }
3601
3602 if (sec->flags & SEC_READONLY)
3603 info->flags |= DF_TEXTREL;
3604
3605 sreloc->size += sizeof (Elf32_External_Rela);
3606 break;
3607
3608 case R_CRIS_8_PCREL:
3609 case R_CRIS_16_PCREL:
3610 case R_CRIS_32_PCREL:
3611 if (h != NULL)
3612 {
3613 h->non_got_ref = 1;
3614
3615 /* Make sure a plt entry is created for this symbol if it
3616 turns out to be a function defined by a dynamic object. */
3617 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3618 h->plt.refcount++;
3619 }
3620
3621 /* If we are creating a shared library and this is not a local
3622 symbol, we need to copy the reloc into the shared library.
3623 However when linking with -Bsymbolic and this is a global
3624 symbol which is defined in an object we are including in the
3625 link (i.e., DEF_REGULAR is set), then we can resolve the
3626 reloc directly. At this point we have not seen all the input
3627 files, so it is possible that DEF_REGULAR is not set now but
3628 will be set later (it is never cleared). In case of a weak
3629 definition, DEF_REGULAR may be cleared later by a strong
3630 definition in a shared library. We account for that
3631 possibility below by storing information in the relocs_copied
3632 field of the hash table entry. A similar situation occurs
3633 when creating shared libraries and symbol visibility changes
3634 render the symbol local. */
3635
3636 /* No need to do anything if we're not creating a shared object. */
3637 if (! info->shared)
3638 break;
3639
3640 /* We don't need to handle relocs into sections not going into
3641 the "real" output. */
3642 if ((sec->flags & SEC_ALLOC) == 0)
3643 break;
3644
3645 /* If the symbol is local, then we know already we can
3646 eliminate the reloc. */
3647 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3648 break;
3649
3650 /* If this is with -Bsymbolic and the symbol isn't weak, and
3651 is defined by an ordinary object (the ones we include in
3652 this shared library) then we can also eliminate the
3653 reloc. See comment above for more eliminable cases which
3654 we can't identify at this time. */
3655 if (info->symbolic
3656 && h->root.type != bfd_link_hash_defweak
3657 && h->def_regular)
3658 break;
3659
3660 /* We may need to create a reloc section in the dynobj and made room
3661 for this reloc. */
3662 if (sreloc == NULL)
3663 {
3664 sreloc = _bfd_elf_make_dynamic_reloc_section
3665 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3666
3667 if (sreloc == NULL)
3668 return FALSE;
3669 }
3670
3671 sreloc->size += sizeof (Elf32_External_Rela);
3672
3673 /* We count the number of PC relative relocations we have
3674 entered for this symbol, so that we can discard them
3675 again if the symbol is later defined by a regular object.
3676 We know that h is really a pointer to an
3677 elf_cris_link_hash_entry. */
3678 {
3679 struct elf_cris_link_hash_entry *eh;
3680 struct elf_cris_pcrel_relocs_copied *p;
3681
3682 eh = elf_cris_hash_entry (h);
3683
3684 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3685 if (p->section == sreloc)
3686 break;
3687
3688 if (p == NULL)
3689 {
3690 p = ((struct elf_cris_pcrel_relocs_copied *)
3691 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3692 if (p == NULL)
3693 return FALSE;
3694 p->next = eh->pcrel_relocs_copied;
3695 eh->pcrel_relocs_copied = p;
3696 p->section = sreloc;
3697 p->count = 0;
3698 p->r_type = r_type;
3699 }
3700
3701 ++p->count;
3702 }
3703 break;
3704
3705 /* This relocation describes the C++ object vtable hierarchy.
3706 Reconstruct it for later use during GC. */
3707 case R_CRIS_GNU_VTINHERIT:
3708 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3709 return FALSE;
3710 break;
3711
3712 /* This relocation describes which C++ vtable entries are actually
3713 used. Record for later use during GC. */
3714 case R_CRIS_GNU_VTENTRY:
3715 BFD_ASSERT (h != NULL);
3716 if (h != NULL
3717 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3718 return FALSE;
3719 break;
3720
3721 case R_CRIS_16_TPREL:
3722 case R_CRIS_32_TPREL:
3723 /* Already warned above, when necessary. */
3724 break;
3725
3726 default:
3727 /* Other relocs do not appear here. */
3728 bfd_set_error (bfd_error_bad_value);
3729 return FALSE;
3730 }
3731 }
3732
3733 return TRUE;
3734 }
3735
3736 /* Set the sizes of the dynamic sections. */
3737
3738 static bfd_boolean
3739 elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3740 struct bfd_link_info *info)
3741 {
3742 struct elf_cris_link_hash_table * htab;
3743 bfd *dynobj;
3744 asection *s;
3745 bfd_boolean plt;
3746 bfd_boolean relocs;
3747
3748 htab = elf_cris_hash_table (info);
3749 if (htab == NULL)
3750 return FALSE;
3751
3752 dynobj = elf_hash_table (info)->dynobj;
3753 BFD_ASSERT (dynobj != NULL);
3754
3755 if (elf_hash_table (info)->dynamic_sections_created)
3756 {
3757 /* Set the contents of the .interp section to the interpreter. */
3758 if (info->executable)
3759 {
3760 s = bfd_get_section_by_name (dynobj, ".interp");
3761 BFD_ASSERT (s != NULL);
3762 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3763 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3764 }
3765 }
3766 else
3767 {
3768 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
3769 elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
3770 info);
3771
3772 /* We may have created entries in the .rela.got section.
3773 However, if we are not creating the dynamic sections, we will
3774 not actually use these entries. Reset the size of .rela.got,
3775 which will cause it to get stripped from the output file
3776 below. */
3777 s = bfd_get_section_by_name (dynobj, ".rela.got");
3778 if (s != NULL)
3779 s->size = 0;
3780 }
3781
3782 /* If this is a -Bsymbolic shared link, then we need to discard all PC
3783 relative relocs against symbols defined in a regular object. We
3784 allocated space for them in the check_relocs routine, but we will not
3785 fill them in in the relocate_section routine. We also discard space
3786 for relocs that have become for local symbols due to symbol
3787 visibility changes. For programs, we discard space for relocs for
3788 symbols not referenced by any dynamic object. */
3789 if (info->shared)
3790 elf_cris_link_hash_traverse (htab,
3791 elf_cris_discard_excess_dso_dynamics,
3792 info);
3793 else
3794 elf_cris_link_hash_traverse (htab,
3795 elf_cris_discard_excess_program_dynamics,
3796 info);
3797
3798 /* The check_relocs and adjust_dynamic_symbol entry points have
3799 determined the sizes of the various dynamic sections. Allocate
3800 memory for them. */
3801 plt = FALSE;
3802 relocs = FALSE;
3803 for (s = dynobj->sections; s != NULL; s = s->next)
3804 {
3805 const char *name;
3806
3807 if ((s->flags & SEC_LINKER_CREATED) == 0)
3808 continue;
3809
3810 /* It's OK to base decisions on the section name, because none
3811 of the dynobj section names depend upon the input files. */
3812 name = bfd_get_section_name (dynobj, s);
3813
3814 if (strcmp (name, ".plt") == 0)
3815 {
3816 /* Remember whether there is a PLT. */
3817 plt = s->size != 0;
3818 }
3819 else if (strcmp (name, ".got.plt") == 0)
3820 {
3821 /* The .got.plt contains the .got header as well as the
3822 actual .got.plt contents. The .got header may contain a
3823 R_CRIS_DTPMOD entry at index 3. */
3824 s->size += htab->dtpmod_refcount != 0
3825 ? 8 : 0;
3826 }
3827 else if (CONST_STRNEQ (name, ".rela"))
3828 {
3829 if (strcmp (name, ".rela.got") == 0
3830 && htab->dtpmod_refcount != 0
3831 && info->shared)
3832 s->size += sizeof (Elf32_External_Rela);
3833
3834 if (s->size != 0)
3835 {
3836 /* Remember whether there are any reloc sections other
3837 than .rela.plt. */
3838 if (strcmp (name, ".rela.plt") != 0)
3839 relocs = TRUE;
3840
3841 /* We use the reloc_count field as a counter if we need
3842 to copy relocs into the output file. */
3843 s->reloc_count = 0;
3844 }
3845 }
3846 else if (! CONST_STRNEQ (name, ".got")
3847 && strcmp (name, ".dynbss") != 0)
3848 {
3849 /* It's not one of our sections, so don't allocate space. */
3850 continue;
3851 }
3852
3853 if (s->size == 0)
3854 {
3855 /* If we don't need this section, strip it from the
3856 output file. This is mostly to handle .rela.bss and
3857 .rela.plt. We must create both sections in
3858 create_dynamic_sections, because they must be created
3859 before the linker maps input sections to output
3860 sections. The linker does that before
3861 adjust_dynamic_symbol is called, and it is that
3862 function which decides whether anything needs to go
3863 into these sections. */
3864 s->flags |= SEC_EXCLUDE;
3865 continue;
3866 }
3867
3868 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3869 continue;
3870
3871 /* Allocate memory for the section contents. We use bfd_zalloc here
3872 in case unused entries are not reclaimed before the section's
3873 contents are written out. This should not happen, but this way
3874 if it does, we will not write out garbage. For reloc sections,
3875 this will make entries have the type R_CRIS_NONE. */
3876 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3877 if (s->contents == NULL)
3878 return FALSE;
3879 }
3880
3881 if (elf_hash_table (info)->dynamic_sections_created)
3882 {
3883 /* Add some entries to the .dynamic section. We fill in the
3884 values later, in elf_cris_finish_dynamic_sections, but we
3885 must add the entries now so that we get the correct size for
3886 the .dynamic section. The DT_DEBUG entry is filled in by the
3887 dynamic linker and used by the debugger. */
3888 #define add_dynamic_entry(TAG, VAL) \
3889 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3890
3891 if (!info->shared)
3892 {
3893 if (!add_dynamic_entry (DT_DEBUG, 0))
3894 return FALSE;
3895 }
3896
3897 if (plt)
3898 {
3899 if (!add_dynamic_entry (DT_PLTGOT, 0)
3900 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3901 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3902 || !add_dynamic_entry (DT_JMPREL, 0))
3903 return FALSE;
3904 }
3905
3906 if (relocs)
3907 {
3908 if (!add_dynamic_entry (DT_RELA, 0)
3909 || !add_dynamic_entry (DT_RELASZ, 0)
3910 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3911 return FALSE;
3912 }
3913
3914 if ((info->flags & DF_TEXTREL) != 0)
3915 {
3916 if (!add_dynamic_entry (DT_TEXTREL, 0))
3917 return FALSE;
3918 info->flags |= DF_TEXTREL;
3919 }
3920 }
3921 #undef add_dynamic_entry
3922
3923 return TRUE;
3924 }
3925
3926 /* This function is called via elf_cris_link_hash_traverse if we are
3927 creating a shared object. In the -Bsymbolic case, it discards the
3928 space allocated to copy PC relative relocs against symbols which
3929 are defined in regular objects. For the normal non-symbolic case,
3930 we also discard space for relocs that have become local due to
3931 symbol visibility changes. We allocated space for them in the
3932 check_relocs routine, but we won't fill them in in the
3933 relocate_section routine. */
3934
3935 static bfd_boolean
3936 elf_cris_discard_excess_dso_dynamics (h, inf)
3937 struct elf_cris_link_hash_entry *h;
3938 PTR inf;
3939 {
3940 struct elf_cris_pcrel_relocs_copied *s;
3941 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3942
3943 if (h->root.root.type == bfd_link_hash_warning)
3944 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3945
3946 /* If a symbol has been forced local or we have found a regular
3947 definition for the symbolic link case, then we won't be needing
3948 any relocs. */
3949 if (h->root.def_regular
3950 && (h->root.forced_local
3951 || info->symbolic))
3952 {
3953 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3954 s->section->size -= s->count * sizeof (Elf32_External_Rela);
3955
3956 return TRUE;
3957 }
3958
3959 /* If we have accounted for PC-relative relocs for read-only
3960 sections, now is the time to warn for them. We can't do it in
3961 cris_elf_check_relocs, because we don't know the status of all
3962 symbols at that time (and it's common to force symbols local
3963 late). */
3964
3965 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3966 {
3967 BFD_ASSERT ((s->section->flags & SEC_READONLY) != 0);
3968
3969 /* FIXME: How do we make this optionally a warning only? */
3970 (*_bfd_error_handler)
3971 (_("%B, section `%A', to symbol `%s':\n"
3972 " relocation %s should not be used"
3973 " in a shared object; recompile with -fPIC"),
3974 s->section->owner,
3975 s->section,
3976 h->root.root.root.string,
3977 cris_elf_howto_table[s->r_type].name);
3978
3979 info->flags |= DF_TEXTREL;
3980 }
3981
3982 return TRUE;
3983 }
3984
3985 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3986 creating a shared object. We discard space for relocs for symbols put
3987 in the .got, but which we found we do not have to resolve at run-time. */
3988
3989 static bfd_boolean
3990 elf_cris_discard_excess_program_dynamics (h, inf)
3991 struct elf_cris_link_hash_entry *h;
3992 PTR inf;
3993 {
3994 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3995
3996 if (h->root.root.type == bfd_link_hash_warning)
3997 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3998
3999 /* If we're not creating a shared library and have a symbol which is
4000 referred to by .got references, but the symbol is defined locally,
4001 (or rather, not defined by a DSO) then lose the reloc for the .got
4002 (don't allocate room for it). Likewise for relocs for something
4003 for which we create a PLT. */
4004 if (!h->root.def_dynamic
4005 || h->root.plt.refcount > 0)
4006 {
4007 if (h->reg_got_refcount > 0
4008 /* The size of this section is only valid and in sync with the
4009 various reference counts if we do dynamic; don't decrement it
4010 otherwise. */
4011 && elf_hash_table (info)->dynamic_sections_created)
4012 {
4013 bfd *dynobj = elf_hash_table (info)->dynobj;
4014 asection *srelgot;
4015
4016 BFD_ASSERT (dynobj != NULL);
4017
4018 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
4019
4020 BFD_ASSERT (srelgot != NULL);
4021
4022 srelgot->size -= sizeof (Elf32_External_Rela);
4023 }
4024
4025 /* If the locally-defined symbol isn't used by a DSO, then we don't
4026 have to export it as a dynamic symbol. This was already done for
4027 functions; doing this for all symbols would presumably not
4028 introduce new problems. Of course we don't do this if we're
4029 exporting all dynamic symbols. */
4030 if (! info->export_dynamic
4031 && h->root.dynindx != -1
4032 && !h->root.def_dynamic
4033 && !h->root.ref_dynamic)
4034 {
4035 h->root.dynindx = -1;
4036 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4037 h->root.dynstr_index);
4038 }
4039 }
4040
4041 return TRUE;
4042 }
4043
4044 /* Reject a file depending on presence and expectation of prefixed
4045 underscores on symbols. */
4046
4047 static bfd_boolean
4048 cris_elf_object_p (abfd)
4049 bfd *abfd;
4050 {
4051 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
4052 return FALSE;
4053
4054 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
4055 return (bfd_get_symbol_leading_char (abfd) == '_');
4056 else
4057 return (bfd_get_symbol_leading_char (abfd) == 0);
4058 }
4059
4060 /* Mark presence or absence of leading underscore. Set machine type
4061 flags from mach type. */
4062
4063 static void
4064 cris_elf_final_write_processing (abfd, linker)
4065 bfd *abfd;
4066 bfd_boolean linker ATTRIBUTE_UNUSED;
4067 {
4068 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
4069
4070 e_flags &= ~EF_CRIS_UNDERSCORE;
4071 if (bfd_get_symbol_leading_char (abfd) == '_')
4072 e_flags |= EF_CRIS_UNDERSCORE;
4073
4074 switch (bfd_get_mach (abfd))
4075 {
4076 case bfd_mach_cris_v0_v10:
4077 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
4078 break;
4079
4080 case bfd_mach_cris_v10_v32:
4081 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
4082 break;
4083
4084 case bfd_mach_cris_v32:
4085 e_flags |= EF_CRIS_VARIANT_V32;
4086 break;
4087
4088 default:
4089 _bfd_abort (__FILE__, __LINE__,
4090 _("Unexpected machine number"));
4091 }
4092
4093 elf_elfheader (abfd)->e_flags = e_flags;
4094 }
4095
4096 /* Set the mach type from e_flags value. */
4097
4098 static bfd_boolean
4099 cris_elf_set_mach_from_flags (abfd, flags)
4100 bfd *abfd;
4101 unsigned long flags;
4102 {
4103 switch (flags & EF_CRIS_VARIANT_MASK)
4104 {
4105 case EF_CRIS_VARIANT_ANY_V0_V10:
4106 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
4107 break;
4108
4109 case EF_CRIS_VARIANT_V32:
4110 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
4111 break;
4112
4113 case EF_CRIS_VARIANT_COMMON_V10_V32:
4114 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
4115 break;
4116
4117 default:
4118 /* Since we don't recognize them, we obviously can't support them
4119 with this code; we'd have to require that all future handling
4120 would be optional. */
4121 bfd_set_error (bfd_error_wrong_format);
4122 return FALSE;
4123 }
4124
4125 return TRUE;
4126 }
4127
4128 /* Display the flags field. */
4129
4130 static bfd_boolean
4131 cris_elf_print_private_bfd_data (abfd, ptr)
4132 bfd *abfd;
4133 PTR ptr;
4134 {
4135 FILE *file = (FILE *) ptr;
4136
4137 BFD_ASSERT (abfd != NULL && ptr != NULL);
4138
4139 _bfd_elf_print_private_bfd_data (abfd, ptr);
4140
4141 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4142
4143 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
4144 fprintf (file, _(" [symbols have a _ prefix]"));
4145 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4146 == EF_CRIS_VARIANT_COMMON_V10_V32)
4147 fprintf (file, _(" [v10 and v32]"));
4148 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4149 == EF_CRIS_VARIANT_V32)
4150 fprintf (file, _(" [v32]"));
4151
4152 fputc ('\n', file);
4153 return TRUE;
4154 }
4155
4156 /* Don't mix files with and without a leading underscore. */
4157
4158 static bfd_boolean
4159 cris_elf_merge_private_bfd_data (ibfd, obfd)
4160 bfd *ibfd;
4161 bfd *obfd;
4162 {
4163 int imach, omach;
4164
4165 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4166 return FALSE;
4167
4168 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4169 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4170 return TRUE;
4171
4172 imach = bfd_get_mach (ibfd);
4173
4174 if (! elf_flags_init (obfd))
4175 {
4176 /* This happens when ld starts out with a 'blank' output file. */
4177 elf_flags_init (obfd) = TRUE;
4178
4179 /* We ignore the linker-set mach, and instead set it according to
4180 the first input file. This would also happen if we could
4181 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
4182 This allows us to keep the same linker config across
4183 cris(v0..v10) and crisv32. The drawback is that we can't force
4184 the output type, which might be a sane thing to do for a
4185 v10+v32 compatibility object. */
4186 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4187 return FALSE;
4188 }
4189
4190 if (bfd_get_symbol_leading_char (ibfd)
4191 != bfd_get_symbol_leading_char (obfd))
4192 {
4193 (*_bfd_error_handler)
4194 (bfd_get_symbol_leading_char (ibfd) == '_'
4195 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
4196 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
4197 ibfd);
4198 bfd_set_error (bfd_error_bad_value);
4199 return FALSE;
4200 }
4201
4202 omach = bfd_get_mach (obfd);
4203
4204 if (imach != omach)
4205 {
4206 /* We can get an incompatible combination only if either is
4207 bfd_mach_cris_v32, and the other one isn't compatible. */
4208 if ((imach == bfd_mach_cris_v32
4209 && omach != bfd_mach_cris_v10_v32)
4210 || (omach == bfd_mach_cris_v32
4211 && imach != bfd_mach_cris_v10_v32))
4212 {
4213 (*_bfd_error_handler)
4214 ((imach == bfd_mach_cris_v32)
4215 ? _("%B contains CRIS v32 code, incompatible"
4216 " with previous objects")
4217 : _("%B contains non-CRIS-v32 code, incompatible"
4218 " with previous objects"),
4219 ibfd);
4220 bfd_set_error (bfd_error_bad_value);
4221 return FALSE;
4222 }
4223
4224 /* We don't have to check the case where the input is compatible
4225 with v10 and v32, because the output is already known to be set
4226 to the other (compatible) mach. */
4227 if (omach == bfd_mach_cris_v10_v32
4228 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4229 return FALSE;
4230 }
4231
4232 return TRUE;
4233 }
4234
4235 /* Do side-effects of e_flags copying to obfd. */
4236
4237 static bfd_boolean
4238 cris_elf_copy_private_bfd_data (ibfd, obfd)
4239 bfd *ibfd;
4240 bfd *obfd;
4241 {
4242 /* Call the base function. */
4243 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
4244 return FALSE;
4245
4246 /* If output is big-endian for some obscure reason, stop here. */
4247 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
4248 return FALSE;
4249
4250 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4251 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4252 return TRUE;
4253
4254 /* Do what we really came here for. */
4255 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
4256 }
4257
4258 static enum elf_reloc_type_class
4259 elf_cris_reloc_type_class (rela)
4260 const Elf_Internal_Rela *rela;
4261 {
4262 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
4263 switch (r_type)
4264 {
4265 case R_CRIS_RELATIVE:
4266 return reloc_class_relative;
4267 case R_CRIS_JUMP_SLOT:
4268 return reloc_class_plt;
4269 case R_CRIS_COPY:
4270 return reloc_class_copy;
4271 default:
4272 return reloc_class_normal;
4273 }
4274 }
4275
4276 /* The elf_backend_got_elt_size worker. For one symbol, we can have up to
4277 two GOT entries from three types with two different sizes. We handle
4278 it as a single entry, so we can use the regular offset-calculation
4279 machinery. */
4280
4281 static bfd_vma
4282 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
4283 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4284 struct elf_link_hash_entry *hr,
4285 bfd *ibfd,
4286 unsigned long symndx)
4287 {
4288 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4289 bfd_vma eltsiz = 0;
4290
4291 /* We may have one regular GOT entry or up to two TLS GOT
4292 entries. */
4293 if (h == NULL)
4294 {
4295 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4296 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4297
4298 BFD_ASSERT (local_got_refcounts != NULL);
4299
4300 if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4301 {
4302 /* We can't have a variable referred to both as a regular
4303 variable and through TLS relocs. */
4304 BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4305 && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4306 return 4;
4307 }
4308
4309 if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4310 eltsiz += 8;
4311
4312 if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4313 eltsiz += 4;
4314 }
4315 else
4316 {
4317 struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4318 if (hh->reg_got_refcount > 0)
4319 {
4320 /* The actual error-on-input is emitted elsewhere. */
4321 BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4322 return 4;
4323 }
4324
4325 if (hh->dtp_refcount > 0)
4326 eltsiz += 8;
4327
4328 if (hh->tprel_refcount > 0)
4329 eltsiz += 4;
4330 }
4331
4332 /* We're only called when h->got.refcount is non-zero, so we must
4333 have a non-zero size. */
4334 BFD_ASSERT (eltsiz != 0);
4335 return eltsiz;
4336 }
4337 \f
4338 #define ELF_ARCH bfd_arch_cris
4339 #define ELF_MACHINE_CODE EM_CRIS
4340 #define ELF_MAXPAGESIZE 0x2000
4341
4342 #define TARGET_LITTLE_SYM bfd_elf32_cris_vec
4343 #define TARGET_LITTLE_NAME "elf32-cris"
4344 #define elf_symbol_leading_char 0
4345
4346 #define elf_info_to_howto_rel NULL
4347 #define elf_info_to_howto cris_info_to_howto_rela
4348 #define elf_backend_relocate_section cris_elf_relocate_section
4349 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
4350 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook
4351 #define elf_backend_plt_sym_val cris_elf_plt_sym_val
4352 #define elf_backend_check_relocs cris_elf_check_relocs
4353 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
4354 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
4355
4356 #define elf_backend_can_gc_sections 1
4357 #define elf_backend_can_refcount 1
4358
4359 #define elf_backend_object_p cris_elf_object_p
4360 #define elf_backend_final_write_processing \
4361 cris_elf_final_write_processing
4362 #define bfd_elf32_bfd_print_private_bfd_data \
4363 cris_elf_print_private_bfd_data
4364 #define bfd_elf32_bfd_merge_private_bfd_data \
4365 cris_elf_merge_private_bfd_data
4366 #define bfd_elf32_bfd_copy_private_bfd_data \
4367 cris_elf_copy_private_bfd_data
4368
4369 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
4370 #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
4371
4372 #define bfd_elf32_bfd_link_hash_table_create \
4373 elf_cris_link_hash_table_create
4374 #define elf_backend_adjust_dynamic_symbol \
4375 elf_cris_adjust_dynamic_symbol
4376 #define elf_backend_copy_indirect_symbol \
4377 elf_cris_copy_indirect_symbol
4378 #define elf_backend_size_dynamic_sections \
4379 elf_cris_size_dynamic_sections
4380 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4381 #define elf_backend_finish_dynamic_symbol \
4382 elf_cris_finish_dynamic_symbol
4383 #define elf_backend_finish_dynamic_sections \
4384 elf_cris_finish_dynamic_sections
4385 #define elf_backend_create_dynamic_sections \
4386 _bfd_elf_create_dynamic_sections
4387 #define bfd_elf32_bfd_final_link \
4388 bfd_elf_gc_common_final_link
4389 #define elf_backend_hide_symbol elf_cris_hide_symbol
4390 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
4391
4392 #define elf_backend_want_got_plt 1
4393 #define elf_backend_plt_readonly 1
4394 #define elf_backend_want_plt_sym 0
4395 #define elf_backend_got_header_size 12
4396 #define elf_backend_got_elt_size elf_cris_got_elt_size
4397
4398 /* Later, we my want to optimize RELA entries into REL entries for dynamic
4399 linking and libraries (if it's a win of any significance). Until then,
4400 take the easy route. */
4401 #define elf_backend_may_use_rel_p 0
4402 #define elf_backend_may_use_rela_p 1
4403 #define elf_backend_rela_normal 1
4404
4405 #include "elf32-target.h"
4406
4407 #undef TARGET_LITTLE_SYM
4408 #undef TARGET_LITTLE_NAME
4409 #undef elf_symbol_leading_char
4410
4411 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
4412 #define TARGET_LITTLE_NAME "elf32-us-cris"
4413 #define elf_symbol_leading_char '_'
4414 #undef elf32_bed
4415 #define elf32_bed elf32_us_cris_bed
4416
4417 #include "elf32-target.h"
git-cvsimport of binutils cvsroot