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* section.c (bfd_get_linker_section): New function.
[thirdparty/binutils-gdb.git] / bfd / elf32-cris.c
1 /* CRIS-specific support for 32-bit ELF.
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3 2010, 2011, 2012 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_lwpid = 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_lwpid = 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_linker_section (dynobj, ".plt");
1069 sgot = bfd_get_linker_section (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 && (_bfd_elf_section_offset (output_bfd, info,
1171 input_section,
1172 rel->r_offset)
1173 != (bfd_vma) -1))
1174 {
1175 _bfd_error_handler
1176 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1177 input_bfd,
1178 input_section,
1179 cris_elf_howto_table[r_type].name,
1180 symname);
1181 bfd_set_error (bfd_error_bad_value);
1182 return FALSE;
1183 }
1184 }
1185 }
1186
1187 if (sec != NULL && discarded_section (sec))
1188 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1189 rel, 1, relend, howto, 0, contents);
1190
1191 if (info->relocatable)
1192 continue;
1193
1194 switch (r_type)
1195 {
1196 case R_CRIS_16_GOTPLT:
1197 case R_CRIS_32_GOTPLT:
1198 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1199 but we require a PLT, and the PLT handling will take care of
1200 filling in the PLT-specific GOT entry. For the GOT offset,
1201 calculate it as we do when filling it in for the .got.plt
1202 section. If we don't have a PLT, punt to GOT handling. */
1203 if (h != NULL
1204 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1205 {
1206 asection *sgotplt
1207 = bfd_get_linker_section (dynobj, ".got.plt");
1208 bfd_vma got_offset;
1209
1210 BFD_ASSERT (h->dynindx != -1);
1211 BFD_ASSERT (sgotplt != NULL);
1212
1213 got_offset
1214 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1215
1216 relocation = got_offset;
1217 break;
1218 }
1219
1220 /* We didn't make a PLT entry for this symbol. Maybe everything is
1221 folded into the GOT. Other than folding, this happens when
1222 statically linking PIC code, or when using -Bsymbolic. Check
1223 that we instead have a GOT entry as done for us by
1224 elf_cris_adjust_dynamic_symbol, and drop through into the
1225 ordinary GOT cases. This must not happen for the
1226 executable, because any reference it does to a function
1227 that is satisfied by a DSO must generate a PLT. We assume
1228 these call-specific relocs don't address non-functions. */
1229 if (h != NULL
1230 && (h->got.offset == (bfd_vma) -1
1231 || (!info->shared
1232 && !(h->def_regular
1233 || (!h->def_dynamic
1234 && h->root.type == bfd_link_hash_undefweak)))))
1235 {
1236 (*_bfd_error_handler)
1237 ((h->got.offset == (bfd_vma) -1)
1238 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1239 " against symbol `%s'")
1240 : _("%B, section %A: No PLT for relocation %s"
1241 " against symbol `%s'"),
1242 input_bfd,
1243 input_section,
1244 cris_elf_howto_table[r_type].name,
1245 (symname != NULL && symname[0] != '\0'
1246 ? symname : _("[whose name is lost]")));
1247
1248 /* FIXME: Perhaps blaming input is not the right thing to
1249 do; this is probably an internal error. But it is true
1250 that we didn't like that particular input. */
1251 bfd_set_error (bfd_error_bad_value);
1252 return FALSE;
1253 }
1254 /* Fall through. */
1255
1256 /* The size of the actual relocation is not used here; we only
1257 fill in the GOT table here. */
1258 case R_CRIS_16_GOT:
1259 case R_CRIS_32_GOT:
1260 {
1261 bfd_vma off;
1262
1263 /* Note that despite using RELA relocations, the .got contents
1264 is always filled in with the link-relative relocation
1265 value; the addend. */
1266
1267 if (h != NULL)
1268 {
1269 off = h->got.offset;
1270 BFD_ASSERT (off != (bfd_vma) -1);
1271
1272 if (!elf_hash_table (info)->dynamic_sections_created
1273 || (! info->shared
1274 && (h->def_regular
1275 || h->type == STT_FUNC
1276 || h->needs_plt))
1277 || (info->shared
1278 && (info->symbolic || h->dynindx == -1)
1279 && h->def_regular))
1280 {
1281 /* This wasn't checked above for ! info->shared, but
1282 must hold there if we get here; the symbol must
1283 be defined in the regular program or be undefweak
1284 or be a function or otherwise need a PLT. */
1285 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1286 || info->shared
1287 || h->def_regular
1288 || h->type == STT_FUNC
1289 || h->needs_plt
1290 || h->root.type == bfd_link_hash_undefweak);
1291
1292 /* This is actually a static link, or it is a
1293 -Bsymbolic link and the symbol is defined locally,
1294 or is undefweak, or the symbol was forced to be
1295 local because of a version file, or we're not
1296 creating a dynamic object. We must initialize this
1297 entry in the global offset table. Since the offset
1298 must always be a multiple of 4, we use the least
1299 significant bit to record whether we have
1300 initialized it already.
1301
1302 If this GOT entry should be runtime-initialized, we
1303 will create a .rela.got relocation entry to
1304 initialize the value. This is done in the
1305 finish_dynamic_symbol routine. */
1306 if ((off & 1) != 0)
1307 off &= ~1;
1308 else
1309 {
1310 bfd_put_32 (output_bfd, relocation,
1311 sgot->contents + off);
1312 h->got.offset |= 1;
1313 }
1314 }
1315 }
1316 else
1317 {
1318 BFD_ASSERT (local_got_offsets != NULL
1319 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1320
1321 off = local_got_offsets[r_symndx];
1322
1323 /* The offset must always be a multiple of 4. We use
1324 the least significant bit to record whether we have
1325 already generated the necessary reloc. */
1326 if ((off & 1) != 0)
1327 off &= ~1;
1328 else
1329 {
1330 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1331
1332 if (info->shared)
1333 {
1334 Elf_Internal_Rela outrel;
1335 bfd_byte *loc;
1336
1337 if (srelgot == NULL)
1338 srelgot
1339 = bfd_get_linker_section (dynobj, ".rela.got");
1340 BFD_ASSERT (srelgot != NULL);
1341
1342 outrel.r_offset = (sgot->output_section->vma
1343 + sgot->output_offset
1344 + off);
1345 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1346 outrel.r_addend = relocation;
1347 loc = srelgot->contents;
1348 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1349 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1350 }
1351
1352 local_got_offsets[r_symndx] |= 1;
1353 }
1354 }
1355
1356 relocation = sgot->output_offset + off;
1357 if (rel->r_addend != 0)
1358 {
1359 /* We can't do anything for a relocation which is against
1360 a symbol *plus offset*. GOT holds relocations for
1361 symbols. Make this an error; the compiler isn't
1362 allowed to pass us these kinds of things. */
1363 if (h == NULL)
1364 (*_bfd_error_handler)
1365 (_("%B, section %A: relocation %s with non-zero addend %d"
1366 " against local symbol"),
1367 input_bfd,
1368 input_section,
1369 cris_elf_howto_table[r_type].name,
1370 rel->r_addend);
1371 else
1372 (*_bfd_error_handler)
1373 (_("%B, section %A: relocation %s with non-zero addend %d"
1374 " against symbol `%s'"),
1375 input_bfd,
1376 input_section,
1377 cris_elf_howto_table[r_type].name,
1378 rel->r_addend,
1379 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1380
1381 bfd_set_error (bfd_error_bad_value);
1382 return FALSE;
1383 }
1384 }
1385 break;
1386
1387 case R_CRIS_32_GOTREL:
1388 /* This relocation must only be performed against local symbols.
1389 It's also ok when we link a program and the symbol is either
1390 defined in an ordinary (non-DSO) object or is undefined weak. */
1391 if (h != NULL
1392 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1393 && !(!info->shared
1394 && (h->def_regular
1395 || (!h->def_dynamic
1396 && h->root.type == bfd_link_hash_undefweak))))
1397 {
1398 (*_bfd_error_handler)
1399 (_("%B, section %A: relocation %s is"
1400 " not allowed for global symbol: `%s'"),
1401 input_bfd,
1402 input_section,
1403 cris_elf_howto_table[r_type].name,
1404 symname);
1405 bfd_set_error (bfd_error_bad_value);
1406 return FALSE;
1407 }
1408
1409 /* This can happen if we get a link error with the input ELF
1410 variant mismatching the output variant. Emit an error so
1411 it's noticed if it happens elsewhere. */
1412 if (sgot == NULL)
1413 {
1414 (*_bfd_error_handler)
1415 (_("%B, section %A: relocation %s with no GOT created"),
1416 input_bfd,
1417 input_section,
1418 cris_elf_howto_table[r_type].name);
1419 bfd_set_error (bfd_error_bad_value);
1420 return FALSE;
1421 }
1422
1423 /* This relocation is like a PC-relative one, except the
1424 reference point is the location of GOT. Note that
1425 sgot->output_offset is not involved in this calculation. We
1426 always want the start of entire .got section, not the
1427 position after the reserved header. */
1428 relocation -= sgot->output_section->vma;
1429 break;
1430
1431 case R_CRIS_32_PLT_PCREL:
1432 /* Relocation is to the entry for this symbol in the
1433 procedure linkage table. */
1434
1435 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1436 without using the procedure linkage table. */
1437 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1438 break;
1439
1440 if (h->plt.offset == (bfd_vma) -1
1441 || splt == NULL)
1442 {
1443 /* We didn't make a PLT entry for this symbol. This
1444 happens when statically linking PIC code, or when
1445 using -Bsymbolic. */
1446 break;
1447 }
1448
1449 relocation = (splt->output_section->vma
1450 + splt->output_offset
1451 + h->plt.offset);
1452 break;
1453
1454 case R_CRIS_32_PLT_GOTREL:
1455 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1456 start of the .got section. See also comment at
1457 R_CRIS_32_GOT. */
1458 relocation -= sgot->output_section->vma;
1459
1460 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1461 without using the procedure linkage table. */
1462 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1463 break;
1464
1465 if (h->plt.offset == (bfd_vma) -1
1466 || splt == NULL)
1467 {
1468 /* We didn't make a PLT entry for this symbol. This
1469 happens when statically linking PIC code, or when
1470 using -Bsymbolic. */
1471 break;
1472 }
1473
1474 relocation = (splt->output_section->vma
1475 + splt->output_offset
1476 + h->plt.offset
1477 - sgot->output_section->vma);
1478 break;
1479
1480 case R_CRIS_8_PCREL:
1481 case R_CRIS_16_PCREL:
1482 case R_CRIS_32_PCREL:
1483 /* If the symbol was local, we need no shlib-specific handling. */
1484 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1485 || h->dynindx == -1)
1486 break;
1487
1488 /* Fall through. */
1489 case R_CRIS_8:
1490 case R_CRIS_16:
1491 case R_CRIS_32:
1492 if (info->shared
1493 && r_symndx != STN_UNDEF
1494 && (input_section->flags & SEC_ALLOC) != 0
1495 && ((r_type != R_CRIS_8_PCREL
1496 && r_type != R_CRIS_16_PCREL
1497 && r_type != R_CRIS_32_PCREL)
1498 || (!info->symbolic
1499 || (h != NULL && !h->def_regular))))
1500 {
1501 Elf_Internal_Rela outrel;
1502 bfd_byte *loc;
1503 bfd_boolean skip, relocate;
1504
1505 /* When generating a shared object, these relocations
1506 are copied into the output file to be resolved at run
1507 time. */
1508
1509 if (sreloc == NULL)
1510 {
1511 sreloc = _bfd_elf_get_dynamic_reloc_section
1512 (dynobj, input_section, /*rela?*/ TRUE);
1513 /* The section should have been created in cris_elf_check_relocs,
1514 but that function will not be called for objects which fail in
1515 cris_elf_merge_private_bfd_data. */
1516 if (sreloc == NULL)
1517 {
1518 bfd_set_error (bfd_error_bad_value);
1519 return FALSE;
1520 }
1521 }
1522
1523 skip = FALSE;
1524 relocate = FALSE;
1525
1526 outrel.r_offset =
1527 _bfd_elf_section_offset (output_bfd, info, input_section,
1528 rel->r_offset);
1529 if (outrel.r_offset == (bfd_vma) -1)
1530 skip = TRUE;
1531 else if (outrel.r_offset == (bfd_vma) -2
1532 /* For now, undefined weak symbols with non-default
1533 visibility (yielding 0), like exception info for
1534 discarded sections, will get a R_CRIS_NONE
1535 relocation rather than no relocation, because we
1536 notice too late that the symbol doesn't need a
1537 relocation. */
1538 || (h != NULL
1539 && h->root.type == bfd_link_hash_undefweak
1540 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1541 skip = TRUE, relocate = TRUE;
1542 outrel.r_offset += (input_section->output_section->vma
1543 + input_section->output_offset);
1544
1545 if (skip)
1546 memset (&outrel, 0, sizeof outrel);
1547 /* h->dynindx may be -1 if the symbol was marked to
1548 become local. */
1549 else if (h != NULL
1550 && ((! info->symbolic && h->dynindx != -1)
1551 || !h->def_regular))
1552 {
1553 BFD_ASSERT (h->dynindx != -1);
1554 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1555 outrel.r_addend = relocation + rel->r_addend;
1556 }
1557 else
1558 {
1559 outrel.r_addend = relocation + rel->r_addend;
1560
1561 if (r_type == R_CRIS_32)
1562 {
1563 relocate = TRUE;
1564 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1565 }
1566 else
1567 {
1568 long indx;
1569
1570 if (bfd_is_abs_section (sec))
1571 indx = 0;
1572 else if (sec == NULL || sec->owner == NULL)
1573 {
1574 bfd_set_error (bfd_error_bad_value);
1575 return FALSE;
1576 }
1577 else
1578 {
1579 asection *osec;
1580
1581 /* We are turning this relocation into one
1582 against a section symbol. It would be
1583 proper to subtract the symbol's value,
1584 osec->vma, from the emitted reloc addend,
1585 but ld.so expects buggy relocs. */
1586 osec = sec->output_section;
1587 indx = elf_section_data (osec)->dynindx;
1588 if (indx == 0)
1589 {
1590 osec = htab->root.text_index_section;
1591 indx = elf_section_data (osec)->dynindx;
1592 }
1593 BFD_ASSERT (indx != 0);
1594 }
1595
1596 outrel.r_info = ELF32_R_INFO (indx, r_type);
1597 }
1598 }
1599
1600 loc = sreloc->contents;
1601 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1602 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1603
1604 /* This reloc will be computed at runtime, so there's no
1605 need to do anything now, except for R_CRIS_32 relocations
1606 that have been turned into R_CRIS_RELATIVE. */
1607 if (!relocate)
1608 continue;
1609 }
1610
1611 break;
1612
1613 case R_CRIS_16_DTPREL:
1614 case R_CRIS_32_DTPREL:
1615 /* This relocation must only be performed against local
1616 symbols, or to sections that are not loadable. It's also
1617 ok when we link a program and the symbol is defined in an
1618 ordinary (non-DSO) object (if it's undefined there, we've
1619 already seen an error). */
1620 if (h != NULL
1621 && (input_section->flags & SEC_ALLOC) != 0
1622 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1623 && (info->shared
1624 || (!h->def_regular
1625 && h->root.type != bfd_link_hash_undefined)))
1626 {
1627 (*_bfd_error_handler)
1628 ((h->root.type == bfd_link_hash_undefined)
1629 /* We shouldn't get here for GCC-emitted code. */
1630 ? _("%B, section %A: relocation %s has an undefined"
1631 " reference to `%s', perhaps a declaration mixup?")
1632 : ("%B, section %A: relocation %s is"
1633 " not allowed for `%s', a global symbol with default"
1634 " visibility, perhaps a declaration mixup?"),
1635 input_bfd,
1636 input_section,
1637 cris_elf_howto_table[r_type].name,
1638 symname != NULL && symname[0] != '\0'
1639 ? symname : _("[whose name is lost]"));
1640 bfd_set_error (bfd_error_bad_value);
1641 return FALSE;
1642 }
1643
1644 BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1645 || htab->dtpmod_refcount != 0);
1646
1647 /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1648 already done so. Note that we do this in .got.plt, not
1649 in .got, as .got.plt contains the first part, still the
1650 reloc is against .got, because the linker script directs
1651 (is required to direct) them both into .got. */
1652 if (htab->dtpmod_refcount > 0
1653 && (input_section->flags & SEC_ALLOC) != 0)
1654 {
1655 asection *sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1656 BFD_ASSERT (sgotplt != NULL);
1657
1658 if (info->shared)
1659 {
1660 Elf_Internal_Rela outrel;
1661 bfd_byte *loc;
1662
1663 if (srelgot == NULL)
1664 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1665 BFD_ASSERT (srelgot != NULL);
1666 loc = srelgot->contents;
1667 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1668
1669 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1670 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1671 outrel.r_offset = (sgotplt->output_section->vma
1672 + sgotplt->output_offset
1673 + 12);
1674 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1675 outrel.r_addend = 0;
1676 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1677 }
1678 else
1679 {
1680 /* For an executable, the GOT entry contents is known. */
1681 bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1682 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1683 }
1684
1685 /* Reverse the sign to mark that we've emitted the
1686 required GOT entry. */
1687 htab->dtpmod_refcount = - htab->dtpmod_refcount;
1688 }
1689
1690 /* The relocation is the offset from the start of the module
1691 TLS block to the (local) symbol. */
1692 relocation -= elf_hash_table (info)->tls_sec == NULL
1693 ? 0 : elf_hash_table (info)->tls_sec->vma;
1694 break;
1695
1696 case R_CRIS_32_GD:
1697 if (info->shared)
1698 {
1699 bfd_set_error (bfd_error_invalid_operation);
1700
1701 /* We've already informed in cris_elf_check_relocs that
1702 this is an error. */
1703 return FALSE;
1704 }
1705 /* Fall through. */
1706
1707 case R_CRIS_16_GOT_GD:
1708 case R_CRIS_32_GOT_GD:
1709 if (rel->r_addend != 0)
1710 {
1711 /* We can't do anything for a relocation which is against a
1712 symbol *plus offset*. The GOT holds relocations for
1713 symbols. Make this an error; the compiler isn't allowed
1714 to pass us these kinds of things. */
1715 (*_bfd_error_handler)
1716 (_("%B, section %A: relocation %s with non-zero addend %d"
1717 " against symbol `%s'"),
1718 input_bfd,
1719 input_section,
1720 cris_elf_howto_table[r_type].name,
1721 rel->r_addend,
1722 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1723
1724 bfd_set_error (bfd_error_bad_value);
1725 return FALSE;
1726 }
1727
1728 if (!info->shared
1729 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1730 {
1731 /* Known contents of the GOT. */
1732 bfd_vma off;
1733
1734 /* The symbol is defined in the program, so just write
1735 (1, known_tpoffset) into the GOT. */
1736 relocation -= elf_hash_table (info)->tls_sec->vma;
1737
1738 if (h != NULL)
1739 {
1740 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1741 ? h->got.offset + 4 : h->got.offset;
1742 }
1743 else
1744 {
1745 off = local_got_offsets[r_symndx];
1746 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1747 off += 4;
1748 }
1749
1750 /* We use bit 1 of the offset as a flag for GOT entry with
1751 the R_CRIS_DTP reloc, setting it when we've emitted the
1752 GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL
1753 relocs. */
1754 if ((off & 2) == 0)
1755 {
1756 off &= ~3;
1757
1758 if (h != NULL)
1759 h->got.offset |= 2;
1760 else
1761 local_got_offsets[r_symndx] |= 2;
1762
1763 bfd_put_32 (output_bfd, 1, sgot->contents + off);
1764 bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1765 }
1766 else
1767 off &= ~3;
1768
1769 relocation = sgot->output_offset + off
1770 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1771 }
1772 else
1773 {
1774 /* Not all parts of the GOT entry are known; emit a real
1775 relocation. */
1776 bfd_vma off;
1777
1778 if (h != NULL)
1779 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1780 ? h->got.offset + 4 : h->got.offset;
1781 else
1782 {
1783 off = local_got_offsets[r_symndx];
1784 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1785 off += 4;
1786 }
1787
1788 /* See above re bit 1 and bit 0 usage. */
1789 if ((off & 2) == 0)
1790 {
1791 Elf_Internal_Rela outrel;
1792 bfd_byte *loc;
1793
1794 off &= ~3;
1795
1796 if (h != NULL)
1797 h->got.offset |= 2;
1798 else
1799 local_got_offsets[r_symndx] |= 2;
1800
1801 /* Clear the target contents of the GOT (just as a
1802 gesture; it's already cleared on allocation): this
1803 relocation is not like the other dynrelocs. */
1804 bfd_put_32 (output_bfd, 0, sgot->contents + off);
1805 bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1806
1807 if (srelgot == NULL)
1808 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1809 BFD_ASSERT (srelgot != NULL);
1810
1811 if (h != NULL && h->dynindx != -1)
1812 {
1813 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1814 relocation = 0;
1815 }
1816 else
1817 {
1818 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1819
1820 /* NULL if we had an error. */
1821 relocation -= elf_hash_table (info)->tls_sec == NULL
1822 ? 0 : elf_hash_table (info)->tls_sec->vma;
1823 }
1824
1825 outrel.r_offset = (sgot->output_section->vma
1826 + sgot->output_offset
1827 + off);
1828 outrel.r_addend = relocation;
1829 loc = srelgot->contents;
1830 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1831
1832 /* NULL if we had an error. */
1833 if (srelgot->contents != NULL)
1834 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1835 }
1836 else
1837 off &= ~3;
1838
1839 relocation = sgot->output_offset + off
1840 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1841 }
1842
1843 /* The GOT-relative offset to the GOT entry is the
1844 relocation, or for R_CRIS_32_GD, the actual address of
1845 the GOT entry. */
1846 break;
1847
1848 case R_CRIS_32_IE:
1849 if (info->shared)
1850 {
1851 bfd_set_error (bfd_error_invalid_operation);
1852
1853 /* We've already informed in cris_elf_check_relocs that
1854 this is an error. */
1855 return FALSE;
1856 }
1857 /* Fall through. */
1858
1859 case R_CRIS_32_GOT_TPREL:
1860 case R_CRIS_16_GOT_TPREL:
1861 if (rel->r_addend != 0)
1862 {
1863 /* We can't do anything for a relocation which is
1864 against a symbol *plus offset*. GOT holds
1865 relocations for symbols. Make this an error; the
1866 compiler isn't allowed to pass us these kinds of
1867 things. */
1868 (*_bfd_error_handler)
1869 (_("%B, section %A: relocation %s with non-zero addend %d"
1870 " against symbol `%s'"),
1871 input_bfd,
1872 input_section,
1873 cris_elf_howto_table[r_type].name,
1874 rel->r_addend,
1875 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1876 bfd_set_error (bfd_error_bad_value);
1877 return FALSE;
1878 }
1879
1880 if (!info->shared
1881 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1882 {
1883 /* Known contents of the GOT. */
1884 bfd_vma off;
1885
1886 /* The symbol is defined in the program, so just write
1887 the -prog_tls_size+known_tpoffset into the GOT. */
1888 relocation -= elf_hash_table (info)->tls_sec->vma;
1889 relocation -= elf_hash_table (info)->tls_size;
1890
1891 if (h != NULL)
1892 off = h->got.offset;
1893 else
1894 off = local_got_offsets[r_symndx];
1895
1896 /* Bit 0 is used to mark whether we've emitted the required
1897 entry (and if needed R_CRIS_32_TPREL reloc). Bit 1
1898 is used similarly for R_CRIS_DTP, see above. */
1899 if ((off & 1) == 0)
1900 {
1901 off &= ~3;
1902
1903 if (h != NULL)
1904 h->got.offset |= 1;
1905 else
1906 local_got_offsets[r_symndx] |= 1;
1907
1908 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1909 }
1910 else
1911 off &= ~3;
1912
1913 relocation = sgot->output_offset + off
1914 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1915 }
1916 else
1917 {
1918 /* Emit a real relocation. */
1919 bfd_vma off;
1920
1921 if (h != NULL)
1922 off = h->got.offset;
1923 else
1924 off = local_got_offsets[r_symndx];
1925
1926 /* See above re usage of bit 0 and 1. */
1927 if ((off & 1) == 0)
1928 {
1929 Elf_Internal_Rela outrel;
1930 bfd_byte *loc;
1931
1932 off &= ~3;
1933
1934 if (h != NULL)
1935 h->got.offset |= 1;
1936 else
1937 local_got_offsets[r_symndx] |= 1;
1938
1939 if (srelgot == NULL)
1940 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1941 BFD_ASSERT (srelgot != NULL);
1942
1943 if (h != NULL && h->dynindx != -1)
1944 {
1945 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1946 relocation = 0;
1947 }
1948 else
1949 {
1950 outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1951
1952 /* NULL if we had an error. */
1953 relocation -= elf_hash_table (info)->tls_sec == NULL
1954 ? 0 : elf_hash_table (info)->tls_sec->vma;
1955 }
1956
1957 /* Just "define" the initial contents in some
1958 semi-logical way. */
1959 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1960
1961 outrel.r_offset = (sgot->output_section->vma
1962 + sgot->output_offset
1963 + off);
1964 outrel.r_addend = relocation;
1965 loc = srelgot->contents;
1966 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1967 /* NULL if we had an error. */
1968 if (srelgot->contents != NULL)
1969 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1970 }
1971 else
1972 off &= ~3;
1973
1974 relocation = sgot->output_offset + off
1975 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1976 }
1977
1978 /* The GOT-relative offset to the GOT entry is the relocation,
1979 or for R_CRIS_32_GD, the actual address of the GOT entry. */
1980 break;
1981
1982 case R_CRIS_16_TPREL:
1983 case R_CRIS_32_TPREL:
1984 /* This relocation must only be performed against symbols
1985 defined in an ordinary (non-DSO) object. */
1986 if (info->shared)
1987 {
1988 bfd_set_error (bfd_error_invalid_operation);
1989
1990 /* We've already informed in cris_elf_check_relocs that
1991 this is an error. */
1992 return FALSE;
1993 }
1994
1995 if (h != NULL
1996 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1997 && !(h->def_regular || ELF_COMMON_DEF_P (h))
1998 /* If it's undefined, then an error message has already
1999 been emitted. */
2000 && h->root.type != bfd_link_hash_undefined)
2001 {
2002 (*_bfd_error_handler)
2003 (_("%B, section %A: relocation %s is"
2004 " not allowed for symbol: `%s'"
2005 " which is defined outside the program,"
2006 " perhaps a declaration mixup?"),
2007 input_bfd,
2008 input_section,
2009 cris_elf_howto_table[r_type].name,
2010 symname);
2011 bfd_set_error (bfd_error_bad_value);
2012 return FALSE;
2013 }
2014
2015 /* NULL if we had an error. */
2016 relocation -= elf_hash_table (info)->tls_sec == NULL
2017 ? 0
2018 : (elf_hash_table (info)->tls_sec->vma
2019 + elf_hash_table (info)->tls_size);
2020
2021 /* The TLS-relative offset is the relocation. */
2022 break;
2023
2024 default:
2025 BFD_FAIL ();
2026 return FALSE;
2027 }
2028
2029 r = cris_final_link_relocate (howto, input_bfd, input_section,
2030 contents, rel, relocation);
2031
2032 if (r != bfd_reloc_ok)
2033 {
2034 const char * msg = (const char *) NULL;
2035
2036 switch (r)
2037 {
2038 case bfd_reloc_overflow:
2039 r = info->callbacks->reloc_overflow
2040 (info, (h ? &h->root : NULL), symname, howto->name,
2041 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
2042 if (additional_relocation_error_msg_count > 0)
2043 {
2044 additional_relocation_error_msg_count--;
2045 switch (r_type)
2046 {
2047 case R_CRIS_16_GOTPLT:
2048 case R_CRIS_16_GOT:
2049
2050 /* Not just TLS is involved here, so we make
2051 generation and message depend on -fPIC/-fpic
2052 only. */
2053 case R_CRIS_16_GOT_TPREL:
2054 case R_CRIS_16_GOT_GD:
2055 (*_bfd_error_handler)
2056 (_("(too many global variables for -fpic:"
2057 " recompile with -fPIC)"));
2058 break;
2059
2060 case R_CRIS_16_TPREL:
2061 case R_CRIS_16_DTPREL:
2062 (*_bfd_error_handler)
2063 (_("(thread-local data too big for -fpic or"
2064 " -msmall-tls: recompile with -fPIC or"
2065 " -mno-small-tls)"));
2066 break;
2067
2068 /* No known cause for overflow for other relocs. */
2069 default:
2070 break;
2071 }
2072 }
2073 break;
2074
2075 case bfd_reloc_undefined:
2076 r = info->callbacks->undefined_symbol
2077 (info, symname, input_bfd, input_section, rel->r_offset,
2078 TRUE);
2079 break;
2080
2081 case bfd_reloc_outofrange:
2082 msg = _("internal error: out of range error");
2083 break;
2084
2085 case bfd_reloc_notsupported:
2086 msg = _("internal error: unsupported relocation error");
2087 break;
2088
2089 case bfd_reloc_dangerous:
2090 msg = _("internal error: dangerous relocation");
2091 break;
2092
2093 default:
2094 msg = _("internal error: unknown error");
2095 break;
2096 }
2097
2098 if (msg)
2099 r = info->callbacks->warning
2100 (info, msg, symname, input_bfd, input_section, rel->r_offset);
2101
2102 if (! r)
2103 return FALSE;
2104 }
2105 }
2106
2107 return TRUE;
2108 }
2109 \f
2110 /* Finish up dynamic symbol handling. We set the contents of various
2111 dynamic sections here. */
2112
2113 static bfd_boolean
2114 elf_cris_finish_dynamic_symbol (bfd *output_bfd,
2115 struct bfd_link_info *info,
2116 struct elf_link_hash_entry *h,
2117 Elf_Internal_Sym *sym)
2118 {
2119 struct elf_cris_link_hash_table * htab;
2120 bfd *dynobj;
2121
2122 /* Where in the plt entry to put values. */
2123 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2124
2125 /* What offset to add to the distance to the first PLT entry for the
2126 value at plt_off3. */
2127 int plt_off3_value_bias = 4;
2128
2129 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2130 for PIC and non-PIC for v32 and pre-v32). */
2131 int plt_stub_offset = 8;
2132 int plt_entry_size = PLT_ENTRY_SIZE;
2133 const bfd_byte *plt_entry = elf_cris_plt_entry;
2134 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2135
2136 htab = elf_cris_hash_table (info);
2137 if (htab == NULL)
2138 return FALSE;
2139
2140 /* Adjust the various PLT entry offsets. */
2141 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2142 {
2143 plt_off2 = 14;
2144 plt_off3 = 20;
2145 plt_off3_value_bias = -2;
2146 plt_stub_offset = 12;
2147 plt_entry_size = PLT_ENTRY_SIZE_V32;
2148 plt_entry = elf_cris_plt_entry_v32;
2149 plt_pic_entry = elf_cris_pic_plt_entry_v32;
2150 }
2151
2152 dynobj = elf_hash_table (info)->dynobj;
2153
2154 if (h->plt.offset != (bfd_vma) -1)
2155 {
2156 asection *splt;
2157 asection *sgotplt;
2158 asection *srela;
2159 bfd_vma got_base;
2160
2161 bfd_vma gotplt_offset
2162 = elf_cris_hash_entry (h)->gotplt_offset;
2163 Elf_Internal_Rela rela;
2164 bfd_byte *loc;
2165 bfd_boolean has_gotplt = gotplt_offset != 0;
2166
2167 /* Get the index in the .rela.plt relocations for the .got.plt
2168 entry that corresponds to this symbol.
2169 We have to count backwards here, and the result is only valid
2170 as an index into .rela.plt. We also have to undo the effect
2171 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2172 .got.plt) for which gotplt_offset is adjusted, because while
2173 that entry goes into .got.plt, its relocation goes into
2174 .rela.got, not .rela.plt. (It's not PLT-specific; not to be
2175 processed as part of the runtime lazy .rela.plt relocation).
2176 FIXME: There be literal constants here... */
2177 bfd_vma rela_plt_index
2178 = (htab->dtpmod_refcount != 0
2179 ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2180
2181 /* Get the offset into the .got table of the entry that corresponds
2182 to this function. Note that we embed knowledge that "incoming"
2183 .got goes after .got.plt in the output without padding (pointer
2184 aligned). However, that knowledge is present in several other
2185 places too. */
2186 bfd_vma got_offset
2187 = (has_gotplt
2188 ? gotplt_offset
2189 : h->got.offset + htab->next_gotplt_entry);
2190
2191 /* This symbol has an entry in the procedure linkage table. Set it
2192 up. */
2193
2194 BFD_ASSERT (h->dynindx != -1);
2195
2196 splt = bfd_get_linker_section (dynobj, ".plt");
2197 sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
2198 srela = bfd_get_linker_section (dynobj, ".rela.plt");
2199 BFD_ASSERT (splt != NULL && sgotplt != NULL
2200 && (! has_gotplt || srela != NULL));
2201
2202 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2203
2204 /* Fill in the entry in the procedure linkage table. */
2205 if (! info->shared)
2206 {
2207 memcpy (splt->contents + h->plt.offset, plt_entry,
2208 plt_entry_size);
2209
2210 /* We need to enter the absolute address of the GOT entry here. */
2211 bfd_put_32 (output_bfd, got_base + got_offset,
2212 splt->contents + h->plt.offset + plt_off1);
2213 }
2214 else
2215 {
2216 memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2217 plt_entry_size);
2218 bfd_put_32 (output_bfd, got_offset,
2219 splt->contents + h->plt.offset + plt_off1);
2220 }
2221
2222 /* Fill in the plt entry and make a relocation, if this is a "real"
2223 PLT entry. */
2224 if (has_gotplt)
2225 {
2226 /* Fill in the offset to the reloc table. */
2227 bfd_put_32 (output_bfd,
2228 rela_plt_index * sizeof (Elf32_External_Rela),
2229 splt->contents + h->plt.offset + plt_off2);
2230
2231 /* Fill in the offset to the first PLT entry, where to "jump". */
2232 bfd_put_32 (output_bfd,
2233 - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2234 splt->contents + h->plt.offset + plt_off3);
2235
2236 /* Fill in the entry in the global offset table with the address of
2237 the relocating stub. */
2238 bfd_put_32 (output_bfd,
2239 (splt->output_section->vma
2240 + splt->output_offset
2241 + h->plt.offset
2242 + plt_stub_offset),
2243 sgotplt->contents + got_offset);
2244
2245 /* Fill in the entry in the .rela.plt section. */
2246 rela.r_offset = (sgotplt->output_section->vma
2247 + sgotplt->output_offset
2248 + got_offset);
2249 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2250 rela.r_addend = 0;
2251 loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2252 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2253 }
2254
2255 if (!h->def_regular)
2256 {
2257 /* Mark the symbol as undefined, rather than as defined in
2258 the .plt section. Leave the value alone. */
2259 sym->st_shndx = SHN_UNDEF;
2260
2261 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
2262 know whether resetting the value is significant; if it really
2263 is, rather than a quirk or bug in the sparc port, then I
2264 believe we'd see this elsewhere. */
2265 /* If the symbol is weak, we do need to clear the value.
2266 Otherwise, the PLT entry would provide a definition for
2267 the symbol even if the symbol wasn't defined anywhere,
2268 and so the symbol would never be NULL. */
2269 if (!h->ref_regular_nonweak)
2270 sym->st_value = 0;
2271 }
2272 }
2273
2274 /* For an ordinary program, we emit .got relocs only for symbols that
2275 are in the dynamic-symbols table and are either defined by the
2276 program or are undefined weak symbols, or are function symbols
2277 where we do not output a PLT: the PLT reloc was output above and all
2278 references to the function symbol are redirected to the PLT. */
2279 if (h->got.offset != (bfd_vma) -1
2280 && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2281 && (info->shared
2282 || (h->dynindx != -1
2283 && h->plt.offset == (bfd_vma) -1
2284 && !h->def_regular
2285 && h->root.type != bfd_link_hash_undefweak)))
2286 {
2287 asection *sgot;
2288 asection *srela;
2289 Elf_Internal_Rela rela;
2290 bfd_byte *loc;
2291 bfd_byte *where;
2292
2293 /* This symbol has an entry in the global offset table. Set it up. */
2294
2295 sgot = bfd_get_linker_section (dynobj, ".got");
2296 srela = bfd_get_linker_section (dynobj, ".rela.got");
2297 BFD_ASSERT (sgot != NULL && srela != NULL);
2298
2299 rela.r_offset = (sgot->output_section->vma
2300 + sgot->output_offset
2301 + (h->got.offset &~ (bfd_vma) 1));
2302
2303 /* If this is a static link, or it is a -Bsymbolic link and the
2304 symbol is defined locally or was forced to be local because
2305 of a version file, we just want to emit a RELATIVE reloc.
2306 The entry in the global offset table will already have been
2307 initialized in the relocate_section function. */
2308 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2309 if (! elf_hash_table (info)->dynamic_sections_created
2310 || (info->shared
2311 && (info->symbolic || h->dynindx == -1)
2312 && h->def_regular))
2313 {
2314 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2315 rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2316 }
2317 else
2318 {
2319 bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2320 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2321 rela.r_addend = 0;
2322 }
2323
2324 loc = srela->contents;
2325 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2326 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2327 }
2328
2329 if (h->needs_copy)
2330 {
2331 asection *s;
2332 Elf_Internal_Rela rela;
2333 bfd_byte *loc;
2334
2335 /* This symbol needs a copy reloc. Set it up. */
2336
2337 BFD_ASSERT (h->dynindx != -1
2338 && (h->root.type == bfd_link_hash_defined
2339 || h->root.type == bfd_link_hash_defweak));
2340
2341 s = bfd_get_linker_section (dynobj, ".rela.bss");
2342 BFD_ASSERT (s != NULL);
2343
2344 rela.r_offset = (h->root.u.def.value
2345 + h->root.u.def.section->output_section->vma
2346 + h->root.u.def.section->output_offset);
2347 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2348 rela.r_addend = 0;
2349 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2350 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2351 }
2352
2353 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2354 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2355 || h == elf_hash_table (info)->hgot)
2356 sym->st_shndx = SHN_ABS;
2357
2358 return TRUE;
2359 }
2360 \f
2361 /* Finish up the dynamic sections. Do *not* emit relocs here, as their
2362 offsets were changed, as part of -z combreloc handling, from those we
2363 computed. */
2364
2365 static bfd_boolean
2366 elf_cris_finish_dynamic_sections (output_bfd, info)
2367 bfd *output_bfd;
2368 struct bfd_link_info *info;
2369 {
2370 bfd *dynobj;
2371 asection *sgot;
2372 asection *sdyn;
2373
2374 dynobj = elf_hash_table (info)->dynobj;
2375
2376 sgot = bfd_get_linker_section (dynobj, ".got.plt");
2377 BFD_ASSERT (sgot != NULL);
2378 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2379
2380 if (elf_hash_table (info)->dynamic_sections_created)
2381 {
2382 asection *splt;
2383 Elf32_External_Dyn *dyncon, *dynconend;
2384
2385 splt = bfd_get_linker_section (dynobj, ".plt");
2386 BFD_ASSERT (splt != NULL && sdyn != NULL);
2387
2388 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2389 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2390 for (; dyncon < dynconend; dyncon++)
2391 {
2392 Elf_Internal_Dyn dyn;
2393 asection *s;
2394
2395 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2396
2397 switch (dyn.d_tag)
2398 {
2399 default:
2400 break;
2401
2402 case DT_PLTGOT:
2403 s = bfd_get_section_by_name (output_bfd, ".got");
2404 BFD_ASSERT (s != NULL);
2405 dyn.d_un.d_ptr = s->vma;
2406 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2407 break;
2408
2409 case DT_JMPREL:
2410 /* Yes, we *can* have a .plt and no .plt.rela, for instance
2411 if all symbols are found in the .got (not .got.plt). */
2412 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2413 dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
2414 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2415 break;
2416
2417 case DT_PLTRELSZ:
2418 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2419 if (s == NULL)
2420 dyn.d_un.d_val = 0;
2421 else
2422 dyn.d_un.d_val = s->size;
2423 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2424 break;
2425
2426 case DT_RELASZ:
2427 /* The procedure linkage table relocs (DT_JMPREL) should
2428 not be included in the overall relocs (DT_RELA).
2429 Therefore, we override the DT_RELASZ entry here to
2430 make it not include the JMPREL relocs. Since the
2431 linker script arranges for .rela.plt to follow all
2432 other relocation sections, we don't have to worry
2433 about changing the DT_RELA entry. */
2434 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2435 if (s != NULL)
2436 dyn.d_un.d_val -= s->size;
2437 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2438 break;
2439 }
2440 }
2441
2442 /* Fill in the first entry in the procedure linkage table. */
2443 if (splt->size > 0)
2444 {
2445 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2446 {
2447 if (info->shared)
2448 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2449 PLT_ENTRY_SIZE_V32);
2450 else
2451 {
2452 memcpy (splt->contents, elf_cris_plt0_entry_v32,
2453 PLT_ENTRY_SIZE_V32);
2454 bfd_put_32 (output_bfd,
2455 sgot->output_section->vma
2456 + sgot->output_offset + 4,
2457 splt->contents + 4);
2458
2459 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2460 = PLT_ENTRY_SIZE_V32;
2461 }
2462 }
2463 else
2464 {
2465 if (info->shared)
2466 memcpy (splt->contents, elf_cris_pic_plt0_entry,
2467 PLT_ENTRY_SIZE);
2468 else
2469 {
2470 memcpy (splt->contents, elf_cris_plt0_entry,
2471 PLT_ENTRY_SIZE);
2472 bfd_put_32 (output_bfd,
2473 sgot->output_section->vma
2474 + sgot->output_offset + 4,
2475 splt->contents + 6);
2476 bfd_put_32 (output_bfd,
2477 sgot->output_section->vma
2478 + sgot->output_offset + 8,
2479 splt->contents + 14);
2480
2481 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2482 = PLT_ENTRY_SIZE;
2483 }
2484 }
2485 }
2486 }
2487
2488 /* Fill in the first three entries in the global offset table. */
2489 if (sgot->size > 0)
2490 {
2491 if (sdyn == NULL)
2492 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2493 else
2494 bfd_put_32 (output_bfd,
2495 sdyn->output_section->vma + sdyn->output_offset,
2496 sgot->contents);
2497 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2498 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2499 }
2500
2501 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2502
2503 return TRUE;
2504 }
2505 \f
2506 /* Return the section that should be marked against GC for a given
2507 relocation. */
2508
2509 static asection *
2510 cris_elf_gc_mark_hook (asection *sec,
2511 struct bfd_link_info *info,
2512 Elf_Internal_Rela *rel,
2513 struct elf_link_hash_entry *h,
2514 Elf_Internal_Sym *sym)
2515 {
2516 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2517 if (h != NULL)
2518 switch (r_type)
2519 {
2520 case R_CRIS_GNU_VTINHERIT:
2521 case R_CRIS_GNU_VTENTRY:
2522 return NULL;
2523
2524 default:
2525 break;
2526 }
2527
2528 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2529 }
2530
2531 /* Update the got entry reference counts for the section being removed. */
2532
2533 static bfd_boolean
2534 cris_elf_gc_sweep_hook (bfd *abfd,
2535 struct bfd_link_info *info,
2536 asection *sec,
2537 const Elf_Internal_Rela *relocs)
2538 {
2539 struct elf_cris_link_hash_table * htab;
2540 Elf_Internal_Shdr *symtab_hdr;
2541 struct elf_link_hash_entry **sym_hashes;
2542 bfd_signed_vma *local_got_refcounts;
2543 const Elf_Internal_Rela *rel, *relend;
2544 bfd *dynobj;
2545 asection *sgot;
2546 asection *srelgot;
2547
2548 if (info->relocatable)
2549 return TRUE;
2550
2551 dynobj = elf_hash_table (info)->dynobj;
2552 if (dynobj == NULL)
2553 return TRUE;
2554
2555 htab = elf_cris_hash_table (info);
2556 if (htab == NULL)
2557 return FALSE;
2558
2559 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2560 sym_hashes = elf_sym_hashes (abfd);
2561 local_got_refcounts = elf_local_got_refcounts (abfd);
2562
2563 sgot = bfd_get_linker_section (dynobj, ".got");
2564 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
2565
2566 relend = relocs + sec->reloc_count;
2567 for (rel = relocs; rel < relend; rel++)
2568 {
2569 unsigned long r_symndx;
2570 struct elf_link_hash_entry *h = NULL;
2571 bfd_signed_vma got_element_size = 4;
2572 bfd_signed_vma *specific_refcount = NULL;
2573 enum elf_cris_reloc_type r_type;
2574
2575 r_symndx = ELF32_R_SYM (rel->r_info);
2576 if (r_symndx >= symtab_hdr->sh_info)
2577 {
2578 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2579 while (h->root.type == bfd_link_hash_indirect
2580 || h->root.type == bfd_link_hash_warning)
2581 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2582 }
2583
2584 r_type = ELF32_R_TYPE (rel->r_info);
2585 switch (r_type)
2586 {
2587 case R_CRIS_32_GOT:
2588 case R_CRIS_16_GOT:
2589 case R_CRIS_16_GOTPLT:
2590 case R_CRIS_32_GOTPLT:
2591 specific_refcount = h != NULL
2592 ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount
2593 : &local_got_refcounts[LGOT_REG_NDX (r_symndx)];
2594 break;
2595
2596 case R_CRIS_32_GD:
2597 case R_CRIS_32_GOT_GD:
2598 case R_CRIS_16_GOT_GD:
2599 got_element_size = 8;
2600 specific_refcount = h != NULL
2601 ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount
2602 : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)];
2603 break;
2604
2605 case R_CRIS_32_IE:
2606 case R_CRIS_16_GOT_TPREL:
2607 case R_CRIS_32_GOT_TPREL:
2608 specific_refcount = h != NULL
2609 ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount
2610 : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)];
2611 break;
2612
2613 default:
2614 break;
2615 }
2616
2617 switch (r_type)
2618 {
2619 case R_CRIS_32_IE:
2620 case R_CRIS_32_GD:
2621 case R_CRIS_16_GOT_TPREL:
2622 case R_CRIS_32_GOT_TPREL:
2623 case R_CRIS_32_GOT_GD:
2624 case R_CRIS_16_GOT_GD:
2625 case R_CRIS_16_GOT:
2626 case R_CRIS_32_GOT:
2627 if (h != NULL)
2628 {
2629 /* If the counters are 0 when we got here, we've
2630 miscounted somehow somewhere, an internal error. */
2631 BFD_ASSERT (h->got.refcount > 0);
2632 --h->got.refcount;
2633
2634 BFD_ASSERT (*specific_refcount > 0);
2635 --*specific_refcount;
2636 if (*specific_refcount == 0)
2637 {
2638 /* We don't need the .got entry any more. */
2639 sgot->size -= got_element_size;
2640 srelgot->size -= sizeof (Elf32_External_Rela);
2641 }
2642 break;
2643 }
2644
2645 local_got_reloc:
2646 if (local_got_refcounts != NULL)
2647 {
2648 /* If the counters are 0 when we got here, we've
2649 miscounted somehow somewhere, an internal error. */
2650 BFD_ASSERT (local_got_refcounts[r_symndx] > 0);
2651 --local_got_refcounts[r_symndx];
2652
2653 BFD_ASSERT (*specific_refcount > 0);
2654 --*specific_refcount;
2655 if (*specific_refcount == 0)
2656 {
2657 /* We don't need the .got entry any more. */
2658 sgot->size -= got_element_size;
2659 if (info->shared)
2660 srelgot->size -= sizeof (Elf32_External_Rela);
2661 }
2662 }
2663 break;
2664
2665 case R_CRIS_16_GOTPLT:
2666 case R_CRIS_32_GOTPLT:
2667 /* For local symbols, treat these like GOT relocs. */
2668 if (h == NULL)
2669 goto local_got_reloc;
2670 else
2671 /* For global symbols, adjust the reloc-specific refcount. */
2672 elf_cris_hash_entry (h)->gotplt_refcount--;
2673 /* Fall through. */
2674
2675 case R_CRIS_32_PLT_GOTREL:
2676 /* FIXME: We don't garbage-collect away the .got section. */
2677 if (local_got_refcounts != NULL)
2678 local_got_refcounts[-1]--;
2679 /* Fall through. */
2680
2681 case R_CRIS_8:
2682 case R_CRIS_16:
2683 case R_CRIS_32:
2684 case R_CRIS_8_PCREL:
2685 case R_CRIS_16_PCREL:
2686 case R_CRIS_32_PCREL:
2687 case R_CRIS_32_PLT_PCREL:
2688 /* Negate the increment we did in cris_elf_check_relocs. */
2689 if (h != NULL)
2690 {
2691 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2692 && h->plt.refcount > 0)
2693 --h->plt.refcount;
2694 }
2695 break;
2696
2697 case R_CRIS_32_DTPREL:
2698 /* This'd be a .dtpreld entry in e.g. debug info. */
2699 if ((sec->flags & SEC_ALLOC) == 0)
2700 break;
2701 /* Fall through. */
2702 case R_CRIS_16_DTPREL:
2703 htab->dtpmod_refcount--;
2704 if (htab->dtpmod_refcount == 0)
2705 htab->next_gotplt_entry -= 8;
2706 BFD_ASSERT (local_got_refcounts != NULL);
2707 local_got_refcounts[-1]--;
2708 break;
2709
2710 default:
2711 break;
2712 }
2713 }
2714
2715 return TRUE;
2716 }
2717
2718 /* The elf_backend_plt_sym_val hook function. */
2719
2720 static bfd_vma
2721 cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, const asection *plt,
2722 const arelent *rel)
2723 {
2724 bfd_size_type plt_entry_size;
2725 bfd_size_type pltoffs;
2726 bfd *abfd = plt->owner;
2727
2728 /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[]. */
2729 bfd_size_type plt_entry_got_offset = 2;
2730 bfd_size_type plt_sec_size;
2731 bfd_size_type got_vma_for_dyn;
2732 asection *got;
2733
2734 /* FIXME: the .got section should be readily available also when
2735 we're not linking. */
2736 if ((got = bfd_get_section_by_name (abfd, ".got")) == NULL)
2737 return (bfd_vma) -1;
2738
2739 plt_sec_size = bfd_section_size (plt->owner, plt);
2740 plt_entry_size
2741 = (bfd_get_mach (abfd) == bfd_mach_cris_v32
2742 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2743
2744 /* Data in PLT is GOT-relative for DYN, but absolute for EXE. */
2745 got_vma_for_dyn = (abfd->flags & EXEC_P) ? 0 : got->vma;
2746
2747 /* Because we can have merged GOT entries; a single .got entry for
2748 both GOT and the PLT part of the GOT (.got.plt), the index of the
2749 reloc in .rela.plt is not the same as the index in the PLT.
2750 Instead, we have to hunt down the GOT offset in the PLT that
2751 corresponds to that of this reloc. Unfortunately, we will only
2752 be called for the .rela.plt relocs, so we'll miss synthetic
2753 symbols for .plt entries with merged GOT entries. (FIXME:
2754 fixable by providing our own bfd_elf32_get_synthetic_symtab.
2755 Doesn't seem worthwile at time of this writing.) FIXME: we've
2756 gone from O(1) to O(N) (N number of PLT entries) for finding each
2757 PLT address. Shouldn't matter in practice though. */
2758
2759 for (pltoffs = plt_entry_size;
2760 pltoffs < plt_sec_size;
2761 pltoffs += plt_entry_size)
2762 {
2763 bfd_size_type got_offset;
2764 bfd_byte gotoffs_raw[4];
2765
2766 if (!bfd_get_section_contents (abfd, (asection *) plt, gotoffs_raw,
2767 pltoffs + plt_entry_got_offset,
2768 sizeof (gotoffs_raw)))
2769 return (bfd_vma) -1;
2770
2771 got_offset = bfd_get_32 (abfd, gotoffs_raw);
2772 if (got_offset + got_vma_for_dyn == rel->address)
2773 return plt->vma + pltoffs;
2774 }
2775
2776 /* While it's tempting to BFD_ASSERT that we shouldn't get here,
2777 that'd not be graceful behavior for invalid input. */
2778 return (bfd_vma) -1;
2779 }
2780
2781 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2782 entry but we found we will not create any. Called when we find we will
2783 not have any PLT for this symbol, by for example
2784 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2785 or elf_cris_size_dynamic_sections if no dynamic sections will be
2786 created (we're only linking static objects). */
2787
2788 static bfd_boolean
2789 elf_cris_adjust_gotplt_to_got (h, p)
2790 struct elf_cris_link_hash_entry *h;
2791 PTR p;
2792 {
2793 struct bfd_link_info *info = (struct bfd_link_info *) p;
2794
2795 /* A GOTPLT reloc, when activated, is supposed to be included into
2796 the PLT refcount. */
2797 BFD_ASSERT (h->gotplt_refcount == 0
2798 || h->gotplt_refcount <= h->root.plt.refcount);
2799
2800 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2801 if (h->gotplt_refcount <= 0)
2802 return TRUE;
2803
2804 if (h->reg_got_refcount > 0)
2805 {
2806 /* There's a GOT entry for this symbol. Just adjust the refcounts.
2807 Probably not necessary at this stage, but keeping them accurate
2808 helps avoiding surprises later. */
2809 h->root.got.refcount += h->gotplt_refcount;
2810 h->reg_got_refcount += h->gotplt_refcount;
2811 h->gotplt_refcount = 0;
2812 }
2813 else
2814 {
2815 /* No GOT entry for this symbol. We need to create one. */
2816 bfd *dynobj = elf_hash_table (info)->dynobj;
2817 asection *sgot;
2818 asection *srelgot;
2819
2820 BFD_ASSERT (dynobj != NULL);
2821 sgot = bfd_get_linker_section (dynobj, ".got");
2822 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
2823
2824 /* Put accurate refcounts there. */
2825 h->root.got.refcount += h->gotplt_refcount;
2826 h->reg_got_refcount = h->gotplt_refcount;
2827
2828 h->gotplt_refcount = 0;
2829
2830 /* We always have a .got and a .rela.got section if there were
2831 GOTPLT relocs in input. */
2832 BFD_ASSERT (sgot != NULL && srelgot != NULL);
2833
2834 /* Allocate space in the .got section. */
2835 sgot->size += 4;
2836
2837 /* Allocate relocation space. */
2838 srelgot->size += sizeof (Elf32_External_Rela);
2839 }
2840
2841 return TRUE;
2842 }
2843
2844 /* Try to fold PLT entries with GOT entries. There are two cases when we
2845 want to do this:
2846
2847 - When all PLT references are GOTPLT references, and there are GOT
2848 references, and this is not the executable. We don't have to
2849 generate a PLT at all.
2850
2851 - When there are both (ordinary) PLT references and GOT references,
2852 and this isn't the executable.
2853 We want to make the PLT reference use the ordinary GOT entry rather
2854 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2855 since the GOT entry will have to be resolved at startup anyway.
2856
2857 Though the latter case is handled when room for the PLT is allocated,
2858 not here.
2859
2860 By folding into the GOT, we may need a round-trip to a PLT in the
2861 executable for calls, a loss in performance. Still, losing a
2862 reloc is a win in size and at least in start-up time.
2863
2864 Note that this function is called before symbols are forced local by
2865 version scripts. The differing cases are handled by
2866 elf_cris_hide_symbol. */
2867
2868 static bfd_boolean
2869 elf_cris_try_fold_plt_to_got (h, p)
2870 struct elf_cris_link_hash_entry *h;
2871 PTR p;
2872 {
2873 struct bfd_link_info *info = (struct bfd_link_info *) p;
2874
2875 /* If there are no GOT references for this symbol, we can't fold any
2876 other reference so there's nothing to do. Likewise if there are no
2877 PLT references; GOTPLT references included. */
2878 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2879 return TRUE;
2880
2881 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2882 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2883
2884 if (h->gotplt_refcount == h->root.plt.refcount)
2885 {
2886 /* The only PLT references are GOTPLT references, and there are GOT
2887 references. Convert PLT to GOT references. */
2888 if (! elf_cris_adjust_gotplt_to_got (h, info))
2889 return FALSE;
2890
2891 /* Clear the PLT references, so no PLT will be created. */
2892 h->root.plt.offset = (bfd_vma) -1;
2893 }
2894
2895 return TRUE;
2896 }
2897
2898 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2899 to use a GOT entry (and create one) rather than requiring a GOTPLT
2900 entry. */
2901
2902 static void
2903 elf_cris_hide_symbol (info, h, force_local)
2904 struct bfd_link_info *info;
2905 struct elf_link_hash_entry *h;
2906 bfd_boolean force_local;
2907 {
2908 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2909
2910 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2911 }
2912
2913 /* Adjust a symbol defined by a dynamic object and referenced by a
2914 regular object. The current definition is in some section of the
2915 dynamic object, but we're not including those sections. We have to
2916 change the definition to something the rest of the link can
2917 understand. */
2918
2919 static bfd_boolean
2920 elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
2921 struct elf_link_hash_entry *h)
2922 {
2923 struct elf_cris_link_hash_table * htab;
2924 bfd *dynobj;
2925 asection *s;
2926 bfd_size_type plt_entry_size;
2927
2928 htab = elf_cris_hash_table (info);
2929 if (htab == NULL)
2930 return FALSE;
2931
2932 dynobj = elf_hash_table (info)->dynobj;
2933
2934 /* Make sure we know what is going on here. */
2935 BFD_ASSERT (dynobj != NULL
2936 && (h->needs_plt
2937 || h->u.weakdef != NULL
2938 || (h->def_dynamic
2939 && h->ref_regular
2940 && !h->def_regular)));
2941
2942 plt_entry_size
2943 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2944 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2945
2946 /* If this is a function, put it in the procedure linkage table. We
2947 will fill in the contents of the procedure linkage table later,
2948 when we know the address of the .got section. */
2949 if (h->type == STT_FUNC
2950 || h->needs_plt)
2951 {
2952 /* If we link a program (not a DSO), we'll get rid of unnecessary
2953 PLT entries; we point to the actual symbols -- even for pic
2954 relocs, because a program built with -fpic should have the same
2955 result as one built without -fpic, specifically considering weak
2956 symbols.
2957 FIXME: m68k and i386 differ here, for unclear reasons. */
2958 if (! info->shared
2959 && !h->def_dynamic)
2960 {
2961 /* This case can occur if we saw a PLT reloc in an input file,
2962 but the symbol was not defined by a dynamic object. In such
2963 a case, we don't actually need to build a procedure linkage
2964 table, and we can just do an absolute or PC reloc instead, or
2965 change a .got.plt index to a .got index for GOTPLT relocs. */
2966 BFD_ASSERT (h->needs_plt);
2967 h->needs_plt = 0;
2968 h->plt.offset = (bfd_vma) -1;
2969 return
2970 elf_cris_adjust_gotplt_to_got ((struct
2971 elf_cris_link_hash_entry *) h,
2972 info);
2973 }
2974
2975 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2976 where a pointer-equivalent symbol was unimportant (i.e. more
2977 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2978 of the PLT. We can't for the executable, because the GOT
2979 entries will point to the PLT there (and be constant). */
2980 if (info->shared
2981 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2982 h, info))
2983 return FALSE;
2984
2985 /* GC or folding may have rendered this entry unused. */
2986 if (h->plt.refcount <= 0)
2987 {
2988 h->needs_plt = 0;
2989 h->plt.offset = (bfd_vma) -1;
2990 return TRUE;
2991 }
2992
2993 /* Make sure this symbol is output as a dynamic symbol. */
2994 if (h->dynindx == -1)
2995 {
2996 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2997 return FALSE;
2998 }
2999
3000 s = bfd_get_linker_section (dynobj, ".plt");
3001 BFD_ASSERT (s != NULL);
3002
3003 /* If this is the first .plt entry, make room for the special
3004 first entry. */
3005 if (s->size == 0)
3006 s->size += plt_entry_size;
3007
3008 /* If this symbol is not defined in a regular file, and we are
3009 not generating a shared library, then set the symbol to this
3010 location in the .plt. */
3011 if (!info->shared
3012 && !h->def_regular)
3013 {
3014 h->root.u.def.section = s;
3015 h->root.u.def.value = s->size;
3016 }
3017
3018 /* If there's already a GOT entry, use that, not a .got.plt. A
3019 GOT field still has a reference count when we get here; it's
3020 not yet changed to an offset. We can't do this for an
3021 executable, because then the reloc associated with the PLT
3022 would get a non-PLT reloc pointing to the PLT. FIXME: Move
3023 this to elf_cris_try_fold_plt_to_got. */
3024 if (info->shared && h->got.refcount > 0)
3025 {
3026 h->got.refcount += h->plt.refcount;
3027
3028 /* Mark the PLT offset to use the GOT entry by setting the low
3029 bit in the plt offset; it is always a multiple of
3030 plt_entry_size (which is at least a multiple of 2). */
3031 BFD_ASSERT ((s->size % plt_entry_size) == 0);
3032
3033 /* Change the PLT refcount to an offset. */
3034 h->plt.offset = s->size;
3035
3036 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
3037 that the got entry should be used instead. */
3038 BFD_ASSERT (((struct elf_cris_link_hash_entry *)
3039 h)->gotplt_offset == 0);
3040
3041 /* Make room for this entry. */
3042 s->size += plt_entry_size;
3043
3044 return TRUE;
3045 }
3046
3047 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
3048 h->plt.offset = s->size;
3049
3050 /* Make room for this entry. */
3051 s->size += plt_entry_size;
3052
3053 /* We also need to make an entry in the .got.plt section, which
3054 will be placed in the .got section by the linker script. */
3055 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
3056 = htab->next_gotplt_entry;
3057 htab->next_gotplt_entry += 4;
3058
3059 s = bfd_get_linker_section (dynobj, ".got.plt");
3060 BFD_ASSERT (s != NULL);
3061 s->size += 4;
3062
3063 /* We also need to make an entry in the .rela.plt section. */
3064
3065 s = bfd_get_linker_section (dynobj, ".rela.plt");
3066 BFD_ASSERT (s != NULL);
3067 s->size += sizeof (Elf32_External_Rela);
3068
3069 return TRUE;
3070 }
3071
3072 /* Reinitialize the plt offset now that it is not used as a reference
3073 count any more. */
3074 h->plt.offset = (bfd_vma) -1;
3075
3076 /* If this is a weak symbol, and there is a real definition, the
3077 processor independent code will have arranged for us to see the
3078 real definition first, and we can just use the same value. */
3079 if (h->u.weakdef != NULL)
3080 {
3081 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3082 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3083 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3084 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3085 return TRUE;
3086 }
3087
3088 /* This is a reference to a symbol defined by a dynamic object which
3089 is not a function. */
3090
3091 /* If we are creating a shared library, we must presume that the
3092 only references to the symbol are via the global offset table.
3093 For such cases we need not do anything here; the relocations will
3094 be handled correctly by relocate_section. */
3095 if (info->shared)
3096 return TRUE;
3097
3098 /* If there are no references to this symbol that do not use the
3099 GOT, we don't need to generate a copy reloc. */
3100 if (!h->non_got_ref)
3101 return TRUE;
3102
3103 /* We must allocate the symbol in our .dynbss section, which will
3104 become part of the .bss section of the executable. There will be
3105 an entry for this symbol in the .dynsym section. The dynamic
3106 object will contain position independent code, so all references
3107 from the dynamic object to this symbol will go through the global
3108 offset table. The dynamic linker will use the .dynsym entry to
3109 determine the address it must put in the global offset table, so
3110 both the dynamic object and the regular object will refer to the
3111 same memory location for the variable. */
3112
3113 s = bfd_get_linker_section (dynobj, ".dynbss");
3114 BFD_ASSERT (s != NULL);
3115
3116 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
3117 copy the initial value out of the dynamic object and into the
3118 runtime process image. We need to remember the offset into the
3119 .rela.bss section we are going to use. */
3120 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
3121 {
3122 asection *srel;
3123
3124 srel = bfd_get_linker_section (dynobj, ".rela.bss");
3125 BFD_ASSERT (srel != NULL);
3126 srel->size += sizeof (Elf32_External_Rela);
3127 h->needs_copy = 1;
3128 }
3129
3130 return _bfd_elf_adjust_dynamic_copy (h, s);
3131 }
3132
3133 /* Adjust our "subclass" elements for an indirect symbol. */
3134
3135 static void
3136 elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
3137 struct elf_link_hash_entry *dir,
3138 struct elf_link_hash_entry *ind)
3139 {
3140 struct elf_cris_link_hash_entry *edir, *eind;
3141
3142 edir = (struct elf_cris_link_hash_entry *) dir;
3143 eind = (struct elf_cris_link_hash_entry *) ind;
3144
3145 /* Only indirect symbols are replaced; we're not interested in
3146 updating any of EIND's fields for other symbols. */
3147 if (eind->root.root.type != bfd_link_hash_indirect)
3148 {
3149 /* Still, we need to copy flags for e.g. weak definitions. */
3150 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3151 return;
3152 }
3153
3154 BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
3155
3156 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
3157 #define XMOVE(F) XMOVOPZ (F, +=, 0)
3158 if (eind->pcrel_relocs_copied != NULL)
3159 {
3160 if (edir->pcrel_relocs_copied != NULL)
3161 {
3162 struct elf_cris_pcrel_relocs_copied **pp;
3163 struct elf_cris_pcrel_relocs_copied *p;
3164
3165 /* Add reloc counts against the indirect sym to the direct sym
3166 list. Merge any entries against the same section. */
3167 for (pp = &eind->pcrel_relocs_copied; *pp != NULL;)
3168 {
3169 struct elf_cris_pcrel_relocs_copied *q;
3170 p = *pp;
3171 for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next)
3172 if (q->section == p->section)
3173 {
3174 q->count += p->count;
3175 *pp = p->next;
3176 break;
3177 }
3178 if (q == NULL)
3179 pp = &p->next;
3180 }
3181 *pp = edir->pcrel_relocs_copied;
3182 }
3183 XMOVOPZ (pcrel_relocs_copied, =, NULL);
3184 }
3185 XMOVE (gotplt_refcount);
3186 XMOVE (gotplt_offset);
3187 XMOVE (reg_got_refcount);
3188 XMOVE (tprel_refcount);
3189 XMOVE (dtp_refcount);
3190 #undef XMOVE
3191 #undef XMOVOPZ
3192
3193 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3194 }
3195
3196 /* Look through the relocs for a section during the first phase. */
3197
3198 static bfd_boolean
3199 cris_elf_check_relocs (bfd *abfd,
3200 struct bfd_link_info *info,
3201 asection *sec,
3202 const Elf_Internal_Rela *relocs)
3203 {
3204 struct elf_cris_link_hash_table * htab;
3205 bfd *dynobj;
3206 Elf_Internal_Shdr *symtab_hdr;
3207 struct elf_link_hash_entry **sym_hashes;
3208 bfd_signed_vma *local_got_refcounts;
3209 const Elf_Internal_Rela *rel;
3210 const Elf_Internal_Rela *rel_end;
3211 asection *sgot;
3212 asection *srelgot;
3213 asection *sreloc;
3214
3215 if (info->relocatable)
3216 return TRUE;
3217
3218 htab = elf_cris_hash_table (info);
3219 if (htab == NULL)
3220 return FALSE;
3221
3222 dynobj = elf_hash_table (info)->dynobj;
3223 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3224 sym_hashes = elf_sym_hashes (abfd);
3225 local_got_refcounts = elf_local_got_refcounts (abfd);
3226
3227 sgot = NULL;
3228 srelgot = NULL;
3229 sreloc = NULL;
3230
3231 rel_end = relocs + sec->reloc_count;
3232 for (rel = relocs; rel < rel_end; rel++)
3233 {
3234 struct elf_link_hash_entry *h;
3235 unsigned long r_symndx;
3236 enum elf_cris_reloc_type r_type;
3237 bfd_signed_vma got_element_size = 4;
3238 unsigned long r_symndx_lgot = INT_MAX;
3239
3240 r_symndx = ELF32_R_SYM (rel->r_info);
3241 if (r_symndx < symtab_hdr->sh_info)
3242 {
3243 h = NULL;
3244 r_symndx_lgot = LGOT_REG_NDX (r_symndx);
3245 }
3246 else
3247 {
3248 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3249 while (h->root.type == bfd_link_hash_indirect
3250 || h->root.type == bfd_link_hash_warning)
3251 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3252 }
3253
3254 r_type = ELF32_R_TYPE (rel->r_info);
3255
3256 /* Some relocs require linker-created sections; we need to hang them
3257 on the first input bfd we found that contained dynamic relocs. */
3258 switch (r_type)
3259 {
3260 case R_CRIS_32_DTPREL:
3261 if ((sec->flags & SEC_ALLOC) == 0)
3262 /* This'd be a .dtpreld entry in e.g. debug info. We have
3263 several different switch statements below, but none of
3264 that is needed; we need no preparations for resolving
3265 R_CRIS_32_DTPREL into a non-allocated section (debug
3266 info), so let's just move on to the next
3267 relocation. */
3268 continue;
3269 /* Fall through. */
3270 case R_CRIS_16_DTPREL:
3271 /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3272 entry at index 3. */
3273 if (htab->dtpmod_refcount == 0)
3274 htab->next_gotplt_entry += 8;
3275
3276 htab->dtpmod_refcount++;
3277 /* Fall through. */
3278
3279 case R_CRIS_32_IE:
3280 case R_CRIS_32_GD:
3281 case R_CRIS_16_GOT_GD:
3282 case R_CRIS_32_GOT_GD:
3283 case R_CRIS_32_GOT_TPREL:
3284 case R_CRIS_16_GOT_TPREL:
3285 case R_CRIS_16_GOT:
3286 case R_CRIS_32_GOT:
3287 case R_CRIS_32_GOTREL:
3288 case R_CRIS_32_PLT_GOTREL:
3289 case R_CRIS_32_PLT_PCREL:
3290 case R_CRIS_16_GOTPLT:
3291 case R_CRIS_32_GOTPLT:
3292 if (dynobj == NULL)
3293 {
3294 elf_hash_table (info)->dynobj = dynobj = abfd;
3295
3296 /* We could handle this if we can get a handle on the
3297 output bfd in elf_cris_adjust_dynamic_symbol. Failing
3298 that, we must insist on dynobj being a specific mach. */
3299 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3300 {
3301 (*_bfd_error_handler)
3302 (_("%B, section %A:\n v10/v32 compatible object %s"
3303 " must not contain a PIC relocation"),
3304 abfd, sec);
3305 return FALSE;
3306 }
3307
3308 /* Create the .got section, so we can assume it's always
3309 present whenever there's a dynobj. */
3310 if (!_bfd_elf_create_got_section (dynobj, info))
3311 return FALSE;
3312 }
3313
3314 if (sgot == NULL)
3315 sgot = bfd_get_linker_section (dynobj, ".got");
3316
3317 if (local_got_refcounts == NULL)
3318 {
3319 bfd_size_type amt;
3320
3321 /* We use index local_got_refcounts[-1] to count all
3322 GOT-relative relocations that do not have explicit
3323 GOT entries. */
3324 amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3325 amt *= sizeof (bfd_signed_vma);
3326 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3327 if (local_got_refcounts == NULL)
3328 return FALSE;
3329
3330 local_got_refcounts++;
3331 elf_local_got_refcounts (abfd) = local_got_refcounts;
3332 }
3333 break;
3334
3335 default:
3336 break;
3337 }
3338
3339 /* Some relocs require a global offset table (but perhaps not a
3340 specific GOT entry). */
3341 switch (r_type)
3342 {
3343 case R_CRIS_16_DTPREL:
3344 case R_CRIS_32_DTPREL:
3345 /* Not requesting .got.rela for an executable: the contents
3346 of the first entry is constant there. For a shared
3347 library, we need .got.rela for the R_CRIS_DTPMOD
3348 relocation at index 3. */
3349 if (!info->shared)
3350 break;
3351 /* Fall through. */
3352
3353 case R_CRIS_32_IE:
3354 case R_CRIS_32_GD:
3355 case R_CRIS_16_GOT_GD:
3356 case R_CRIS_32_GOT_GD:
3357 case R_CRIS_32_GOT_TPREL:
3358 case R_CRIS_16_GOT_TPREL:
3359 /* Fall through. */
3360
3361 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
3362 entry only for local symbols. Unfortunately, we don't know
3363 until later on if there's a version script that forces the
3364 symbol local. We must have the .rela.got section in place
3365 before we know if the symbol looks global now, so we need
3366 to treat the reloc just like for R_CRIS_16_GOT and
3367 R_CRIS_32_GOT. */
3368 case R_CRIS_16_GOTPLT:
3369 case R_CRIS_32_GOTPLT:
3370 case R_CRIS_16_GOT:
3371 case R_CRIS_32_GOT:
3372 if (srelgot == NULL
3373 && (h != NULL || info->shared))
3374 {
3375 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
3376 if (srelgot == NULL)
3377 {
3378 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3379 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3380 | SEC_READONLY);
3381 srelgot = bfd_make_section_anyway_with_flags (dynobj,
3382 ".rela.got",
3383 flags);
3384 if (srelgot == NULL
3385 || !bfd_set_section_alignment (dynobj, srelgot, 2))
3386 return FALSE;
3387 }
3388 }
3389 break;
3390
3391 default:
3392 break;
3393 }
3394
3395 /* Warn and error for invalid input. */
3396 switch (r_type)
3397 {
3398 case R_CRIS_32_IE:
3399 case R_CRIS_32_TPREL:
3400 case R_CRIS_16_TPREL:
3401 case R_CRIS_32_GD:
3402 if (info->shared)
3403 {
3404 (*_bfd_error_handler)
3405 (_("%B, section %A:\n relocation %s not valid"
3406 " in a shared object;"
3407 " typically an option mixup, recompile with -fPIC"),
3408 abfd,
3409 sec,
3410 cris_elf_howto_table[r_type].name);
3411 /* Don't return FALSE here; we want messages for all of
3412 these and the error behavior is ungraceful
3413 anyway. */
3414 }
3415 default:
3416 break;
3417 }
3418
3419 switch (r_type)
3420 {
3421 case R_CRIS_32_GD:
3422 case R_CRIS_16_GOT_GD:
3423 case R_CRIS_32_GOT_GD:
3424 /* These are requests for tls_index entries, run-time R_CRIS_DTP. */
3425 got_element_size = 8;
3426 r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3427 break;
3428
3429 case R_CRIS_16_DTPREL:
3430 case R_CRIS_32_DTPREL:
3431 /* These two just request for the constant-index
3432 module-local tls_index-sized GOT entry, which we add
3433 elsewhere. */
3434 break;
3435
3436 case R_CRIS_32_IE:
3437 case R_CRIS_32_GOT_TPREL:
3438 case R_CRIS_16_GOT_TPREL:
3439 r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3440
3441 /* Those relocs also require that a DSO is of type
3442 Initial Exec. Like other targets, we don't reset this
3443 flag even if the relocs are GC:ed away. */
3444 if (info->shared)
3445 info->flags |= DF_STATIC_TLS;
3446 break;
3447
3448 /* Let's list the other assembler-generated TLS-relocs too,
3449 just to show that they're not forgotten. */
3450 case R_CRIS_16_TPREL:
3451 case R_CRIS_32_TPREL:
3452 default:
3453 break;
3454 }
3455
3456 switch (r_type)
3457 {
3458 case R_CRIS_16_GOTPLT:
3459 case R_CRIS_32_GOTPLT:
3460 /* Mark that we need a GOT entry if the PLT entry (and its GOT
3461 entry) is eliminated. We can only do this for a non-local
3462 symbol. */
3463 if (h != NULL)
3464 {
3465 elf_cris_hash_entry (h)->gotplt_refcount++;
3466 goto handle_gotplt_reloc;
3467 }
3468 /* If h is NULL then this is a local symbol, and we must make a
3469 GOT entry for it, so handle it like a GOT reloc. */
3470 /* Fall through. */
3471
3472 case R_CRIS_32_IE:
3473 case R_CRIS_32_GD:
3474 case R_CRIS_16_GOT_GD:
3475 case R_CRIS_32_GOT_GD:
3476 case R_CRIS_32_GOT_TPREL:
3477 case R_CRIS_16_GOT_TPREL:
3478 case R_CRIS_16_GOT:
3479 case R_CRIS_32_GOT:
3480 /* This symbol requires a global offset table entry. */
3481 if (h != NULL)
3482 {
3483 if (h->got.refcount == 0)
3484 {
3485 /* Make sure this symbol is output as a dynamic symbol. */
3486 if (h->dynindx == -1)
3487 {
3488 if (!bfd_elf_link_record_dynamic_symbol (info, h))
3489 return FALSE;
3490 }
3491 }
3492
3493 /* Update the sum of reloc counts for this symbol. */
3494 h->got.refcount++;
3495
3496 switch (r_type)
3497 {
3498 case R_CRIS_16_GOT:
3499 case R_CRIS_32_GOT:
3500 if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3501 {
3502 /* Allocate space in the .got section. */
3503 sgot->size += got_element_size;
3504 /* Allocate relocation space. */
3505 srelgot->size += sizeof (Elf32_External_Rela);
3506 }
3507 elf_cris_hash_entry (h)->reg_got_refcount++;
3508 break;
3509
3510 case R_CRIS_32_GD:
3511 case R_CRIS_16_GOT_GD:
3512 case R_CRIS_32_GOT_GD:
3513 if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3514 {
3515 /* Allocate space in the .got section. */
3516 sgot->size += got_element_size;
3517 /* Allocate relocation space. */
3518 srelgot->size += sizeof (Elf32_External_Rela);
3519 }
3520 elf_cris_hash_entry (h)->dtp_refcount++;
3521 break;
3522
3523 case R_CRIS_32_IE:
3524 case R_CRIS_32_GOT_TPREL:
3525 case R_CRIS_16_GOT_TPREL:
3526 if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3527 {
3528 /* Allocate space in the .got section. */
3529 sgot->size += got_element_size;
3530 /* Allocate relocation space. */
3531 srelgot->size += sizeof (Elf32_External_Rela);
3532 }
3533 elf_cris_hash_entry (h)->tprel_refcount++;
3534 break;
3535
3536 default:
3537 BFD_FAIL ();
3538 break;
3539 }
3540 }
3541 else
3542 {
3543 /* This is a global offset table entry for a local symbol. */
3544 if (local_got_refcounts[r_symndx_lgot] == 0)
3545 {
3546 sgot->size += got_element_size;
3547 if (info->shared)
3548 {
3549 /* If we are generating a shared object, we need
3550 to output a R_CRIS_RELATIVE reloc so that the
3551 dynamic linker can adjust this GOT entry.
3552 Similarly for non-regular got entries. */
3553 srelgot->size += sizeof (Elf32_External_Rela);
3554 }
3555 }
3556 /* Update the reloc-specific count. */
3557 local_got_refcounts[r_symndx_lgot]++;
3558
3559 /* This one is the sum of all the others. */
3560 local_got_refcounts[r_symndx]++;
3561 }
3562 break;
3563
3564 case R_CRIS_16_DTPREL:
3565 case R_CRIS_32_DTPREL:
3566 case R_CRIS_32_GOTREL:
3567 /* This reference requires a global offset table.
3568 FIXME: The actual refcount isn't used currently; the .got
3569 section can't be removed if there were any references in the
3570 input. */
3571 local_got_refcounts[-1]++;
3572 break;
3573
3574 handle_gotplt_reloc:
3575
3576 case R_CRIS_32_PLT_GOTREL:
3577 /* This reference requires a global offset table. */
3578 local_got_refcounts[-1]++;
3579 /* Fall through. */
3580
3581 case R_CRIS_32_PLT_PCREL:
3582 /* This symbol requires a procedure linkage table entry. We
3583 actually build the entry in adjust_dynamic_symbol,
3584 because this might be a case of linking PIC code which is
3585 never referenced by a dynamic object, in which case we
3586 don't need to generate a procedure linkage table entry
3587 after all. */
3588
3589 /* Beware: if we'd check for visibility of the symbol here
3590 (and not marking the need for a PLT when non-visible), we'd
3591 get into trouble with keeping handling consistent with
3592 regards to relocs found before definition and GOTPLT
3593 handling. Eliminable PLT entries will be dealt with later
3594 anyway. */
3595 if (h == NULL)
3596 continue;
3597
3598 h->needs_plt = 1;
3599 h->plt.refcount++;
3600 break;
3601
3602 case R_CRIS_8:
3603 case R_CRIS_16:
3604 case R_CRIS_32:
3605 /* Let's help debug shared library creation. Any of these
3606 relocs *can* be used in shared libs, but pages containing
3607 them cannot be shared, so they're not appropriate for
3608 common use. Don't warn for sections we don't care about,
3609 such as debug sections or non-constant sections. We
3610 can't help tables of (global) function pointers, for
3611 example, though they must be emitted in a (writable) data
3612 section to avoid having impure text sections. */
3613 if (info->shared
3614 && (sec->flags & SEC_ALLOC) != 0
3615 && (sec->flags & SEC_READONLY) != 0)
3616 {
3617 /* FIXME: How do we make this optionally a warning only? */
3618 (*_bfd_error_handler)
3619 (_("%B, section %A:\n relocation %s should not"
3620 " be used in a shared object; recompile with -fPIC"),
3621 abfd,
3622 sec,
3623 cris_elf_howto_table[r_type].name);
3624 }
3625
3626 /* We don't need to handle relocs into sections not going into
3627 the "real" output. */
3628 if ((sec->flags & SEC_ALLOC) == 0)
3629 break;
3630
3631 if (h != NULL)
3632 {
3633 h->non_got_ref = 1;
3634
3635 /* Make sure a plt entry is created for this symbol if it
3636 turns out to be a function defined by a dynamic object. */
3637 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3638 h->plt.refcount++;
3639 }
3640
3641 /* If we are creating a shared library and this is not a local
3642 symbol, we need to copy the reloc into the shared library.
3643 However when linking with -Bsymbolic and this is a global
3644 symbol which is defined in an object we are including in the
3645 link (i.e., DEF_REGULAR is set), then we can resolve the
3646 reloc directly. At this point we have not seen all the input
3647 files, so it is possible that DEF_REGULAR is not set now but
3648 will be set later (it is never cleared). In case of a weak
3649 definition, DEF_REGULAR may be cleared later by a strong
3650 definition in a shared library. We account for that
3651 possibility below by storing information in the relocs_copied
3652 field of the hash table entry. A similar situation occurs
3653 when creating shared libraries and symbol visibility changes
3654 render the symbol local. */
3655
3656 /* No need to do anything if we're not creating a shared object. */
3657 if (! info->shared)
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 if (sec->flags & SEC_READONLY)
3672 info->flags |= DF_TEXTREL;
3673
3674 sreloc->size += sizeof (Elf32_External_Rela);
3675 break;
3676
3677 case R_CRIS_8_PCREL:
3678 case R_CRIS_16_PCREL:
3679 case R_CRIS_32_PCREL:
3680 if (h != NULL)
3681 {
3682 h->non_got_ref = 1;
3683
3684 /* Make sure a plt entry is created for this symbol if it
3685 turns out to be a function defined by a dynamic object. */
3686 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3687 h->plt.refcount++;
3688 }
3689
3690 /* If we are creating a shared library and this is not a local
3691 symbol, we need to copy the reloc into the shared library.
3692 However when linking with -Bsymbolic and this is a global
3693 symbol which is defined in an object we are including in the
3694 link (i.e., DEF_REGULAR is set), then we can resolve the
3695 reloc directly. At this point we have not seen all the input
3696 files, so it is possible that DEF_REGULAR is not set now but
3697 will be set later (it is never cleared). In case of a weak
3698 definition, DEF_REGULAR may be cleared later by a strong
3699 definition in a shared library. We account for that
3700 possibility below by storing information in the relocs_copied
3701 field of the hash table entry. A similar situation occurs
3702 when creating shared libraries and symbol visibility changes
3703 render the symbol local. */
3704
3705 /* No need to do anything if we're not creating a shared object. */
3706 if (! info->shared)
3707 break;
3708
3709 /* We don't need to handle relocs into sections not going into
3710 the "real" output. */
3711 if ((sec->flags & SEC_ALLOC) == 0)
3712 break;
3713
3714 /* If the symbol is local, then we know already we can
3715 eliminate the reloc. */
3716 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3717 break;
3718
3719 /* If this is with -Bsymbolic and the symbol isn't weak, and
3720 is defined by an ordinary object (the ones we include in
3721 this shared library) then we can also eliminate the
3722 reloc. See comment above for more eliminable cases which
3723 we can't identify at this time. */
3724 if (info->symbolic
3725 && h->root.type != bfd_link_hash_defweak
3726 && h->def_regular)
3727 break;
3728
3729 /* We may need to create a reloc section in the dynobj and made room
3730 for this reloc. */
3731 if (sreloc == NULL)
3732 {
3733 sreloc = _bfd_elf_make_dynamic_reloc_section
3734 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3735
3736 if (sreloc == NULL)
3737 return FALSE;
3738 }
3739
3740 sreloc->size += sizeof (Elf32_External_Rela);
3741
3742 /* We count the number of PC relative relocations we have
3743 entered for this symbol, so that we can discard them
3744 again if the symbol is later defined by a regular object.
3745 We know that h is really a pointer to an
3746 elf_cris_link_hash_entry. */
3747 {
3748 struct elf_cris_link_hash_entry *eh;
3749 struct elf_cris_pcrel_relocs_copied *p;
3750
3751 eh = elf_cris_hash_entry (h);
3752
3753 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3754 if (p->section == sec)
3755 break;
3756
3757 if (p == NULL)
3758 {
3759 p = ((struct elf_cris_pcrel_relocs_copied *)
3760 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3761 if (p == NULL)
3762 return FALSE;
3763 p->next = eh->pcrel_relocs_copied;
3764 eh->pcrel_relocs_copied = p;
3765 p->section = sec;
3766 p->count = 0;
3767 p->r_type = r_type;
3768 }
3769
3770 ++p->count;
3771 }
3772 break;
3773
3774 /* This relocation describes the C++ object vtable hierarchy.
3775 Reconstruct it for later use during GC. */
3776 case R_CRIS_GNU_VTINHERIT:
3777 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3778 return FALSE;
3779 break;
3780
3781 /* This relocation describes which C++ vtable entries are actually
3782 used. Record for later use during GC. */
3783 case R_CRIS_GNU_VTENTRY:
3784 BFD_ASSERT (h != NULL);
3785 if (h != NULL
3786 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3787 return FALSE;
3788 break;
3789
3790 case R_CRIS_16_TPREL:
3791 case R_CRIS_32_TPREL:
3792 /* Already warned above, when necessary. */
3793 break;
3794
3795 default:
3796 /* Other relocs do not appear here. */
3797 bfd_set_error (bfd_error_bad_value);
3798 return FALSE;
3799 }
3800 }
3801
3802 return TRUE;
3803 }
3804
3805 /* Set the sizes of the dynamic sections. */
3806
3807 static bfd_boolean
3808 elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3809 struct bfd_link_info *info)
3810 {
3811 struct elf_cris_link_hash_table * htab;
3812 bfd *dynobj;
3813 asection *s;
3814 bfd_boolean plt;
3815 bfd_boolean relocs;
3816
3817 htab = elf_cris_hash_table (info);
3818 if (htab == NULL)
3819 return FALSE;
3820
3821 dynobj = elf_hash_table (info)->dynobj;
3822 BFD_ASSERT (dynobj != NULL);
3823
3824 if (elf_hash_table (info)->dynamic_sections_created)
3825 {
3826 /* Set the contents of the .interp section to the interpreter. */
3827 if (info->executable)
3828 {
3829 s = bfd_get_linker_section (dynobj, ".interp");
3830 BFD_ASSERT (s != NULL);
3831 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3832 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3833 }
3834 }
3835 else
3836 {
3837 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
3838 elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
3839 info);
3840
3841 /* We may have created entries in the .rela.got section.
3842 However, if we are not creating the dynamic sections, we will
3843 not actually use these entries. Reset the size of .rela.got,
3844 which will cause it to get stripped from the output file
3845 below. */
3846 s = bfd_get_linker_section (dynobj, ".rela.got");
3847 if (s != NULL)
3848 s->size = 0;
3849 }
3850
3851 /* If this is a -Bsymbolic shared link, then we need to discard all PC
3852 relative relocs against symbols defined in a regular object. We
3853 allocated space for them in the check_relocs routine, but we will not
3854 fill them in in the relocate_section routine. We also discard space
3855 for relocs that have become for local symbols due to symbol
3856 visibility changes. For programs, we discard space for relocs for
3857 symbols not referenced by any dynamic object. */
3858 if (info->shared)
3859 elf_cris_link_hash_traverse (htab,
3860 elf_cris_discard_excess_dso_dynamics,
3861 info);
3862 else
3863 elf_cris_link_hash_traverse (htab,
3864 elf_cris_discard_excess_program_dynamics,
3865 info);
3866
3867 /* The check_relocs and adjust_dynamic_symbol entry points have
3868 determined the sizes of the various dynamic sections. Allocate
3869 memory for them. */
3870 plt = FALSE;
3871 relocs = FALSE;
3872 for (s = dynobj->sections; s != NULL; s = s->next)
3873 {
3874 const char *name;
3875
3876 if ((s->flags & SEC_LINKER_CREATED) == 0)
3877 continue;
3878
3879 /* It's OK to base decisions on the section name, because none
3880 of the dynobj section names depend upon the input files. */
3881 name = bfd_get_section_name (dynobj, s);
3882
3883 if (strcmp (name, ".plt") == 0)
3884 {
3885 /* Remember whether there is a PLT. */
3886 plt = s->size != 0;
3887 }
3888 else if (strcmp (name, ".got.plt") == 0)
3889 {
3890 /* The .got.plt contains the .got header as well as the
3891 actual .got.plt contents. The .got header may contain a
3892 R_CRIS_DTPMOD entry at index 3. */
3893 s->size += htab->dtpmod_refcount != 0
3894 ? 8 : 0;
3895 }
3896 else if (CONST_STRNEQ (name, ".rela"))
3897 {
3898 if (strcmp (name, ".rela.got") == 0
3899 && htab->dtpmod_refcount != 0
3900 && info->shared)
3901 s->size += sizeof (Elf32_External_Rela);
3902
3903 if (s->size != 0)
3904 {
3905 /* Remember whether there are any reloc sections other
3906 than .rela.plt. */
3907 if (strcmp (name, ".rela.plt") != 0)
3908 relocs = TRUE;
3909
3910 /* We use the reloc_count field as a counter if we need
3911 to copy relocs into the output file. */
3912 s->reloc_count = 0;
3913 }
3914 }
3915 else if (! CONST_STRNEQ (name, ".got")
3916 && strcmp (name, ".dynbss") != 0)
3917 {
3918 /* It's not one of our sections, so don't allocate space. */
3919 continue;
3920 }
3921
3922 if (s->size == 0)
3923 {
3924 /* If we don't need this section, strip it from the
3925 output file. This is mostly to handle .rela.bss and
3926 .rela.plt. We must create both sections in
3927 create_dynamic_sections, because they must be created
3928 before the linker maps input sections to output
3929 sections. The linker does that before
3930 adjust_dynamic_symbol is called, and it is that
3931 function which decides whether anything needs to go
3932 into these sections. */
3933 s->flags |= SEC_EXCLUDE;
3934 continue;
3935 }
3936
3937 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3938 continue;
3939
3940 /* Allocate memory for the section contents. We use bfd_zalloc here
3941 in case unused entries are not reclaimed before the section's
3942 contents are written out. This should not happen, but this way
3943 if it does, we will not write out garbage. For reloc sections,
3944 this will make entries have the type R_CRIS_NONE. */
3945 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3946 if (s->contents == NULL)
3947 return FALSE;
3948 }
3949
3950 if (elf_hash_table (info)->dynamic_sections_created)
3951 {
3952 /* Add some entries to the .dynamic section. We fill in the
3953 values later, in elf_cris_finish_dynamic_sections, but we
3954 must add the entries now so that we get the correct size for
3955 the .dynamic section. The DT_DEBUG entry is filled in by the
3956 dynamic linker and used by the debugger. */
3957 #define add_dynamic_entry(TAG, VAL) \
3958 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3959
3960 if (!info->shared)
3961 {
3962 if (!add_dynamic_entry (DT_DEBUG, 0))
3963 return FALSE;
3964 }
3965
3966 if (plt)
3967 {
3968 if (!add_dynamic_entry (DT_PLTGOT, 0)
3969 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3970 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3971 || !add_dynamic_entry (DT_JMPREL, 0))
3972 return FALSE;
3973 }
3974
3975 if (relocs)
3976 {
3977 if (!add_dynamic_entry (DT_RELA, 0)
3978 || !add_dynamic_entry (DT_RELASZ, 0)
3979 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3980 return FALSE;
3981 }
3982
3983 if ((info->flags & DF_TEXTREL) != 0)
3984 {
3985 if (!add_dynamic_entry (DT_TEXTREL, 0))
3986 return FALSE;
3987 info->flags |= DF_TEXTREL;
3988 }
3989 }
3990 #undef add_dynamic_entry
3991
3992 return TRUE;
3993 }
3994
3995 /* This function is called via elf_cris_link_hash_traverse if we are
3996 creating a shared object. In the -Bsymbolic case, it discards the
3997 space allocated to copy PC relative relocs against symbols which
3998 are defined in regular objects. For the normal non-symbolic case,
3999 we also discard space for relocs that have become local due to
4000 symbol visibility changes. We allocated space for them in the
4001 check_relocs routine, but we won't fill them in in the
4002 relocate_section routine. */
4003
4004 static bfd_boolean
4005 elf_cris_discard_excess_dso_dynamics (h, inf)
4006 struct elf_cris_link_hash_entry *h;
4007 PTR inf;
4008 {
4009 struct elf_cris_pcrel_relocs_copied *s;
4010 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4011
4012 /* If a symbol has been forced local or we have found a regular
4013 definition for the symbolic link case, then we won't be needing
4014 any relocs. */
4015 if (h->root.def_regular
4016 && (h->root.forced_local
4017 || info->symbolic))
4018 {
4019 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
4020 {
4021 asection *sreloc
4022 = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info)
4023 ->dynobj,
4024 s->section,
4025 /*rela?*/ TRUE);
4026 sreloc->size -= s->count * sizeof (Elf32_External_Rela);
4027 }
4028 return TRUE;
4029 }
4030
4031 /* If we have accounted for PC-relative relocs for read-only
4032 sections, now is the time to warn for them. We can't do it in
4033 cris_elf_check_relocs, because we don't know the status of all
4034 symbols at that time (and it's common to force symbols local
4035 late). */
4036
4037 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
4038 if ((s->section->flags & SEC_READONLY) != 0)
4039 {
4040 /* FIXME: How do we make this optionally a warning only? */
4041 (*_bfd_error_handler)
4042 (_("%B, section `%A', to symbol `%s':\n"
4043 " relocation %s should not be used"
4044 " in a shared object; recompile with -fPIC"),
4045 s->section->owner,
4046 s->section,
4047 h->root.root.root.string,
4048 cris_elf_howto_table[s->r_type].name);
4049
4050 info->flags |= DF_TEXTREL;
4051 }
4052
4053 return TRUE;
4054 }
4055
4056 /* This function is called via elf_cris_link_hash_traverse if we are *not*
4057 creating a shared object. We discard space for relocs for symbols put
4058 in the .got, but which we found we do not have to resolve at run-time. */
4059
4060 static bfd_boolean
4061 elf_cris_discard_excess_program_dynamics (h, inf)
4062 struct elf_cris_link_hash_entry *h;
4063 PTR inf;
4064 {
4065 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4066
4067 /* If we're not creating a shared library and have a symbol which is
4068 referred to by .got references, but the symbol is defined locally,
4069 (or rather, not defined by a DSO) then lose the reloc for the .got
4070 (don't allocate room for it). Likewise for relocs for something
4071 for which we create a PLT. */
4072 if (!h->root.def_dynamic
4073 || h->root.plt.refcount > 0)
4074 {
4075 if (h->reg_got_refcount > 0
4076 /* The size of this section is only valid and in sync with the
4077 various reference counts if we do dynamic; don't decrement it
4078 otherwise. */
4079 && elf_hash_table (info)->dynamic_sections_created)
4080 {
4081 bfd *dynobj = elf_hash_table (info)->dynobj;
4082 asection *srelgot;
4083
4084 BFD_ASSERT (dynobj != NULL);
4085
4086 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
4087
4088 BFD_ASSERT (srelgot != NULL);
4089
4090 srelgot->size -= sizeof (Elf32_External_Rela);
4091 }
4092
4093 /* If the locally-defined symbol isn't used by a DSO, then we don't
4094 have to export it as a dynamic symbol. This was already done for
4095 functions; doing this for all symbols would presumably not
4096 introduce new problems. Of course we don't do this if we're
4097 exporting all dynamic symbols. */
4098 if (! info->export_dynamic
4099 && h->root.dynindx != -1
4100 && !h->root.def_dynamic
4101 && !h->root.ref_dynamic)
4102 {
4103 h->root.dynindx = -1;
4104 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4105 h->root.dynstr_index);
4106 }
4107 }
4108
4109 return TRUE;
4110 }
4111
4112 /* Reject a file depending on presence and expectation of prefixed
4113 underscores on symbols. */
4114
4115 static bfd_boolean
4116 cris_elf_object_p (abfd)
4117 bfd *abfd;
4118 {
4119 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
4120 return FALSE;
4121
4122 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
4123 return (bfd_get_symbol_leading_char (abfd) == '_');
4124 else
4125 return (bfd_get_symbol_leading_char (abfd) == 0);
4126 }
4127
4128 /* Mark presence or absence of leading underscore. Set machine type
4129 flags from mach type. */
4130
4131 static void
4132 cris_elf_final_write_processing (abfd, linker)
4133 bfd *abfd;
4134 bfd_boolean linker ATTRIBUTE_UNUSED;
4135 {
4136 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
4137
4138 e_flags &= ~EF_CRIS_UNDERSCORE;
4139 if (bfd_get_symbol_leading_char (abfd) == '_')
4140 e_flags |= EF_CRIS_UNDERSCORE;
4141
4142 switch (bfd_get_mach (abfd))
4143 {
4144 case bfd_mach_cris_v0_v10:
4145 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
4146 break;
4147
4148 case bfd_mach_cris_v10_v32:
4149 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
4150 break;
4151
4152 case bfd_mach_cris_v32:
4153 e_flags |= EF_CRIS_VARIANT_V32;
4154 break;
4155
4156 default:
4157 _bfd_abort (__FILE__, __LINE__,
4158 _("Unexpected machine number"));
4159 }
4160
4161 elf_elfheader (abfd)->e_flags = e_flags;
4162 }
4163
4164 /* Set the mach type from e_flags value. */
4165
4166 static bfd_boolean
4167 cris_elf_set_mach_from_flags (abfd, flags)
4168 bfd *abfd;
4169 unsigned long flags;
4170 {
4171 switch (flags & EF_CRIS_VARIANT_MASK)
4172 {
4173 case EF_CRIS_VARIANT_ANY_V0_V10:
4174 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
4175 break;
4176
4177 case EF_CRIS_VARIANT_V32:
4178 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
4179 break;
4180
4181 case EF_CRIS_VARIANT_COMMON_V10_V32:
4182 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
4183 break;
4184
4185 default:
4186 /* Since we don't recognize them, we obviously can't support them
4187 with this code; we'd have to require that all future handling
4188 would be optional. */
4189 bfd_set_error (bfd_error_wrong_format);
4190 return FALSE;
4191 }
4192
4193 return TRUE;
4194 }
4195
4196 /* Display the flags field. */
4197
4198 static bfd_boolean
4199 cris_elf_print_private_bfd_data (abfd, ptr)
4200 bfd *abfd;
4201 PTR ptr;
4202 {
4203 FILE *file = (FILE *) ptr;
4204
4205 BFD_ASSERT (abfd != NULL && ptr != NULL);
4206
4207 _bfd_elf_print_private_bfd_data (abfd, ptr);
4208
4209 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4210
4211 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
4212 fprintf (file, _(" [symbols have a _ prefix]"));
4213 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4214 == EF_CRIS_VARIANT_COMMON_V10_V32)
4215 fprintf (file, _(" [v10 and v32]"));
4216 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4217 == EF_CRIS_VARIANT_V32)
4218 fprintf (file, _(" [v32]"));
4219
4220 fputc ('\n', file);
4221 return TRUE;
4222 }
4223
4224 /* Don't mix files with and without a leading underscore. */
4225
4226 static bfd_boolean
4227 cris_elf_merge_private_bfd_data (ibfd, obfd)
4228 bfd *ibfd;
4229 bfd *obfd;
4230 {
4231 int imach, omach;
4232
4233 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4234 return FALSE;
4235
4236 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4237 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4238 return TRUE;
4239
4240 imach = bfd_get_mach (ibfd);
4241
4242 if (! elf_flags_init (obfd))
4243 {
4244 /* This happens when ld starts out with a 'blank' output file. */
4245 elf_flags_init (obfd) = TRUE;
4246
4247 /* We ignore the linker-set mach, and instead set it according to
4248 the first input file. This would also happen if we could
4249 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
4250 This allows us to keep the same linker config across
4251 cris(v0..v10) and crisv32. The drawback is that we can't force
4252 the output type, which might be a sane thing to do for a
4253 v10+v32 compatibility object. */
4254 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4255 return FALSE;
4256 }
4257
4258 if (bfd_get_symbol_leading_char (ibfd)
4259 != bfd_get_symbol_leading_char (obfd))
4260 {
4261 (*_bfd_error_handler)
4262 (bfd_get_symbol_leading_char (ibfd) == '_'
4263 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
4264 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
4265 ibfd);
4266 bfd_set_error (bfd_error_bad_value);
4267 return FALSE;
4268 }
4269
4270 omach = bfd_get_mach (obfd);
4271
4272 if (imach != omach)
4273 {
4274 /* We can get an incompatible combination only if either is
4275 bfd_mach_cris_v32, and the other one isn't compatible. */
4276 if ((imach == bfd_mach_cris_v32
4277 && omach != bfd_mach_cris_v10_v32)
4278 || (omach == bfd_mach_cris_v32
4279 && imach != bfd_mach_cris_v10_v32))
4280 {
4281 (*_bfd_error_handler)
4282 ((imach == bfd_mach_cris_v32)
4283 ? _("%B contains CRIS v32 code, incompatible"
4284 " with previous objects")
4285 : _("%B contains non-CRIS-v32 code, incompatible"
4286 " with previous objects"),
4287 ibfd);
4288 bfd_set_error (bfd_error_bad_value);
4289 return FALSE;
4290 }
4291
4292 /* We don't have to check the case where the input is compatible
4293 with v10 and v32, because the output is already known to be set
4294 to the other (compatible) mach. */
4295 if (omach == bfd_mach_cris_v10_v32
4296 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4297 return FALSE;
4298 }
4299
4300 return TRUE;
4301 }
4302
4303 /* Do side-effects of e_flags copying to obfd. */
4304
4305 static bfd_boolean
4306 cris_elf_copy_private_bfd_data (ibfd, obfd)
4307 bfd *ibfd;
4308 bfd *obfd;
4309 {
4310 /* Call the base function. */
4311 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
4312 return FALSE;
4313
4314 /* If output is big-endian for some obscure reason, stop here. */
4315 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
4316 return FALSE;
4317
4318 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4319 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4320 return TRUE;
4321
4322 /* Do what we really came here for. */
4323 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
4324 }
4325
4326 static enum elf_reloc_type_class
4327 elf_cris_reloc_type_class (rela)
4328 const Elf_Internal_Rela *rela;
4329 {
4330 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
4331 switch (r_type)
4332 {
4333 case R_CRIS_RELATIVE:
4334 return reloc_class_relative;
4335 case R_CRIS_JUMP_SLOT:
4336 return reloc_class_plt;
4337 case R_CRIS_COPY:
4338 return reloc_class_copy;
4339 default:
4340 return reloc_class_normal;
4341 }
4342 }
4343
4344 /* The elf_backend_got_elt_size worker. For one symbol, we can have up to
4345 two GOT entries from three types with two different sizes. We handle
4346 it as a single entry, so we can use the regular offset-calculation
4347 machinery. */
4348
4349 static bfd_vma
4350 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
4351 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4352 struct elf_link_hash_entry *hr,
4353 bfd *ibfd,
4354 unsigned long symndx)
4355 {
4356 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4357 bfd_vma eltsiz = 0;
4358
4359 /* We may have one regular GOT entry or up to two TLS GOT
4360 entries. */
4361 if (h == NULL)
4362 {
4363 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4364 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4365
4366 BFD_ASSERT (local_got_refcounts != NULL);
4367
4368 if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4369 {
4370 /* We can't have a variable referred to both as a regular
4371 variable and through TLS relocs. */
4372 BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4373 && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4374 return 4;
4375 }
4376
4377 if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4378 eltsiz += 8;
4379
4380 if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4381 eltsiz += 4;
4382 }
4383 else
4384 {
4385 struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4386 if (hh->reg_got_refcount > 0)
4387 {
4388 /* The actual error-on-input is emitted elsewhere. */
4389 BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4390 return 4;
4391 }
4392
4393 if (hh->dtp_refcount > 0)
4394 eltsiz += 8;
4395
4396 if (hh->tprel_refcount > 0)
4397 eltsiz += 4;
4398 }
4399
4400 /* We're only called when h->got.refcount is non-zero, so we must
4401 have a non-zero size. */
4402 BFD_ASSERT (eltsiz != 0);
4403 return eltsiz;
4404 }
4405 \f
4406 #define ELF_ARCH bfd_arch_cris
4407 #define ELF_TARGET_ID CRIS_ELF_DATA
4408 #define ELF_MACHINE_CODE EM_CRIS
4409 #define ELF_MAXPAGESIZE 0x2000
4410
4411 #define TARGET_LITTLE_SYM bfd_elf32_cris_vec
4412 #define TARGET_LITTLE_NAME "elf32-cris"
4413 #define elf_symbol_leading_char 0
4414
4415 #define elf_info_to_howto_rel NULL
4416 #define elf_info_to_howto cris_info_to_howto_rela
4417 #define elf_backend_relocate_section cris_elf_relocate_section
4418 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
4419 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook
4420 #define elf_backend_plt_sym_val cris_elf_plt_sym_val
4421 #define elf_backend_check_relocs cris_elf_check_relocs
4422 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
4423 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
4424
4425 #define elf_backend_can_gc_sections 1
4426 #define elf_backend_can_refcount 1
4427
4428 #define elf_backend_object_p cris_elf_object_p
4429 #define elf_backend_final_write_processing \
4430 cris_elf_final_write_processing
4431 #define bfd_elf32_bfd_print_private_bfd_data \
4432 cris_elf_print_private_bfd_data
4433 #define bfd_elf32_bfd_merge_private_bfd_data \
4434 cris_elf_merge_private_bfd_data
4435 #define bfd_elf32_bfd_copy_private_bfd_data \
4436 cris_elf_copy_private_bfd_data
4437
4438 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
4439 #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
4440
4441 #define bfd_elf32_bfd_link_hash_table_create \
4442 elf_cris_link_hash_table_create
4443 #define elf_backend_adjust_dynamic_symbol \
4444 elf_cris_adjust_dynamic_symbol
4445 #define elf_backend_copy_indirect_symbol \
4446 elf_cris_copy_indirect_symbol
4447 #define elf_backend_size_dynamic_sections \
4448 elf_cris_size_dynamic_sections
4449 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4450 #define elf_backend_finish_dynamic_symbol \
4451 elf_cris_finish_dynamic_symbol
4452 #define elf_backend_finish_dynamic_sections \
4453 elf_cris_finish_dynamic_sections
4454 #define elf_backend_create_dynamic_sections \
4455 _bfd_elf_create_dynamic_sections
4456 #define bfd_elf32_bfd_final_link \
4457 bfd_elf_gc_common_final_link
4458 #define elf_backend_hide_symbol elf_cris_hide_symbol
4459 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
4460
4461 #define elf_backend_want_got_plt 1
4462 #define elf_backend_plt_readonly 1
4463 #define elf_backend_want_plt_sym 0
4464 #define elf_backend_got_header_size 12
4465 #define elf_backend_got_elt_size elf_cris_got_elt_size
4466
4467 /* Later, we my want to optimize RELA entries into REL entries for dynamic
4468 linking and libraries (if it's a win of any significance). Until then,
4469 take the easy route. */
4470 #define elf_backend_may_use_rel_p 0
4471 #define elf_backend_may_use_rela_p 1
4472 #define elf_backend_rela_normal 1
4473
4474 #include "elf32-target.h"
4475
4476 #undef TARGET_LITTLE_SYM
4477 #undef TARGET_LITTLE_NAME
4478 #undef elf_symbol_leading_char
4479
4480 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
4481 #define TARGET_LITTLE_NAME "elf32-us-cris"
4482 #define elf_symbol_leading_char '_'
4483 #undef elf32_bed
4484 #define elf32_bed elf32_us_cris_bed
4485
4486 #include "elf32-target.h"
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