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Contents of /trunk/bfd/elf32-cris.c

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Revision 21 - (show annotations) (download) (as text)
Mon Jul 27 20:34:36 2009 UTC (14 years, 8 months ago) by monamour
File MIME type: text/x-csrc
File size: 137377 byte(s) 
Update to HEAD.
1 /* CRIS-specific support for 32-bit ELF.
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
3 Free Software Foundation, Inc.
4 Contributed by Axis Communications AB.
5 Written by Hans-Peter Nilsson, based on elf32-fr30.c
6 PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23 MA 02110-1301, USA. */
24
25 #include "sysdep.h"
26 #include "bfd.h"
27 #include "libbfd.h"
28 #include "elf-bfd.h"
29 #include "elf/cris.h"
30 #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
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
559 /* Support for core dump NOTE sections.
560 The slightly unintuitive code layout is an attempt to keep at least
561 some similarities with other ports, hoping to simplify general
562 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
563
564 static bfd_boolean
565 cris_elf_grok_prstatus (abfd, note)
566 bfd *abfd;
567 Elf_Internal_Note *note;
568 {
569 int offset;
570 size_t size;
571
572 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
573 switch (note->descsz)
574 {
575 default:
576 return FALSE;
577
578 case 202: /* Linux/CRISv32 */
579 /* pr_cursig */
580 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
581
582 /* pr_pid */
583 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
584
585 /* pr_reg */
586 offset = 70;
587 size = 128;
588
589 break;
590 }
591 else
592 switch (note->descsz)
593 {
594 default:
595 return FALSE;
596
597 case 214: /* Linux/CRIS */
598 /* pr_cursig */
599 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
600
601 /* pr_pid */
602 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
603
604 /* pr_reg */
605 offset = 70;
606 size = 140;
607
608 break;
609 }
610
611 /* Make a ".reg/999" section. */
612 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
613 size, note->descpos + offset);
614 }
615
616 static bfd_boolean
617 cris_elf_grok_psinfo (abfd, note)
618 bfd *abfd;
619 Elf_Internal_Note *note;
620 {
621 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
622 switch (note->descsz)
623 {
624 default:
625 return FALSE;
626
627 case 124: /* Linux/CRISv32 elf_prpsinfo */
628 elf_tdata (abfd)->core_program
629 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
630 elf_tdata (abfd)->core_command
631 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
632 }
633 else
634 switch (note->descsz)
635 {
636 default:
637 return FALSE;
638
639 case 124: /* Linux/CRIS elf_prpsinfo */
640 elf_tdata (abfd)->core_program
641 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
642 elf_tdata (abfd)->core_command
643 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
644 }
645
646 /* Note that for some reason, a spurious space is tacked
647 onto the end of the args in some (at least one anyway)
648 implementations, so strip it off if it exists. */
649
650 {
651 char *command = elf_tdata (abfd)->core_command;
652 int n = strlen (command);
653
654 if (0 < n && command[n - 1] == ' ')
655 command[n - 1] = '\0';
656 }
657
658 return TRUE;
659 }
660
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
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 (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (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 ((struct elf_cris_link_hash_table *) (p)->hash)
895
896 /* Get the CRIS ELF linker hash entry from a regular hash entry (the
897 "parent class"). The .root reference is just a simple type
898 check on the argument. */
899
900 #define elf_cris_hash_entry(p) \
901 ((struct elf_cris_link_hash_entry *) (&(p)->root))
902
903 /* Create an entry in a CRIS ELF linker hash table. */
904
905 static struct bfd_hash_entry *
906 elf_cris_link_hash_newfunc (entry, table, string)
907 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 (abfd)
944 bfd *abfd;
945 {
946 struct elf_cris_link_hash_table *ret;
947 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
948
949 ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
950 if (ret == (struct elf_cris_link_hash_table *) NULL)
951 return NULL;
952
953 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
954 elf_cris_link_hash_newfunc,
955 sizeof (struct elf_cris_link_hash_entry)))
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
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
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 (output_bfd, info, input_bfd, input_section,
1031 contents, relocs, local_syms, local_sections)
1032 bfd *output_bfd ATTRIBUTE_UNUSED;
1033 struct bfd_link_info *info;
1034 bfd *input_bfd;
1035 asection *input_section;
1036 bfd_byte *contents;
1037 Elf_Internal_Rela *relocs;
1038 Elf_Internal_Sym *local_syms;
1039 asection **local_sections;
1040 {
1041 bfd *dynobj;
1042 Elf_Internal_Shdr *symtab_hdr;
1043 struct elf_link_hash_entry **sym_hashes;
1044 bfd_vma *local_got_offsets;
1045 asection *sgot;
1046 asection *splt;
1047 asection *sreloc;
1048 Elf_Internal_Rela *rel;
1049 Elf_Internal_Rela *relend;
1050 asection *srelgot;
1051
1052 dynobj = elf_hash_table (info)->dynobj;
1053 local_got_offsets = elf_local_got_offsets (input_bfd);
1054 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1055 sym_hashes = elf_sym_hashes (input_bfd);
1056 relend = relocs + input_section->reloc_count;
1057
1058 sgot = NULL;
1059 splt = NULL;
1060 sreloc = NULL;
1061 srelgot = NULL;
1062
1063 if (dynobj != NULL)
1064 {
1065 splt = bfd_get_section_by_name (dynobj, ".plt");
1066 sgot = bfd_get_section_by_name (dynobj, ".got");
1067 }
1068
1069 for (rel = relocs; rel < relend; rel ++)
1070 {
1071 reloc_howto_type *howto;
1072 unsigned long r_symndx;
1073 Elf_Internal_Sym *sym;
1074 asection *sec;
1075 struct elf_link_hash_entry *h;
1076 bfd_vma relocation;
1077 bfd_reloc_status_type r;
1078 const char *symname = NULL;
1079 enum elf_cris_reloc_type r_type;
1080
1081 r_type = ELF32_R_TYPE (rel->r_info);
1082
1083 if ( r_type == R_CRIS_GNU_VTINHERIT
1084 || r_type == R_CRIS_GNU_VTENTRY)
1085 continue;
1086
1087 r_symndx = ELF32_R_SYM (rel->r_info);
1088 howto = cris_elf_howto_table + r_type;
1089 h = NULL;
1090 sym = NULL;
1091 sec = NULL;
1092
1093 if (r_symndx < symtab_hdr->sh_info)
1094 {
1095 sym = local_syms + r_symndx;
1096 sec = local_sections [r_symndx];
1097 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1098
1099 symname = (bfd_elf_string_from_elf_section
1100 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1101 if (symname == NULL)
1102 symname = bfd_section_name (input_bfd, sec);
1103 }
1104 else
1105 {
1106 bfd_boolean warned;
1107 bfd_boolean unresolved_reloc;
1108
1109 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1110 r_symndx, symtab_hdr, sym_hashes,
1111 h, sec, relocation,
1112 unresolved_reloc, warned);
1113
1114 symname = h->root.root.string;
1115
1116 if (unresolved_reloc
1117 /* Perhaps we should detect the cases that
1118 sec->output_section is expected to be NULL like i386 and
1119 m68k, but apparently (and according to elfxx-ia64.c) all
1120 valid cases are where the symbol is defined in a shared
1121 object which we link dynamically against. This includes
1122 PLT relocs for which we've created a PLT entry and other
1123 relocs for which we're prepared to create dynamic
1124 relocations.
1125
1126 For now, new situations cause us to just err when
1127 sec->output_offset is NULL but the object with the symbol
1128 is *not* dynamically linked against. Thus this will
1129 automatically remind us so we can see if there are other
1130 valid cases we need to revisit. */
1131 && (sec->owner->flags & DYNAMIC) != 0)
1132 relocation = 0;
1133
1134 else if (h->root.type == bfd_link_hash_defined
1135 || h->root.type == bfd_link_hash_defweak)
1136 {
1137 /* Here follow the cases where the relocation value must
1138 be zero (or when further handling is simplified when
1139 zero). I can't claim to understand the various
1140 conditions and they weren't described in the files
1141 where I copied them from (elf32-m68k.c and
1142 elf32-i386.c), but let's mention examples of where
1143 they happen. FIXME: Perhaps define and use a
1144 dynamic_symbol_p function like ia64.
1145
1146 - When creating a shared library, we can have an
1147 ordinary relocation for a symbol defined in a shared
1148 library (perhaps the one we create). We then make
1149 the relocation value zero, as the value seen now will
1150 be added into the relocation addend in this shared
1151 library, but must be handled only at dynamic-link
1152 time. FIXME: Not sure this example covers the
1153 h->elf_link_hash_flags test, though it's there in
1154 other targets. */
1155 if (info->shared
1156 && ((! info->symbolic && h->dynindx != -1)
1157 || !h->def_regular)
1158 && (input_section->flags & SEC_ALLOC) != 0
1159 && (r_type == R_CRIS_8
1160 || r_type == R_CRIS_16
1161 || r_type == R_CRIS_32
1162 || r_type == R_CRIS_8_PCREL
1163 || r_type == R_CRIS_16_PCREL
1164 || r_type == R_CRIS_32_PCREL))
1165 relocation = 0;
1166 else if (!info->relocatable && unresolved_reloc)
1167 {
1168 _bfd_error_handler
1169 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1170 input_bfd,
1171 input_section,
1172 cris_elf_howto_table[r_type].name,
1173 symname);
1174 bfd_set_error (bfd_error_bad_value);
1175 return FALSE;
1176 }
1177 }
1178 }
1179
1180 if (sec != NULL && elf_discarded_section (sec))
1181 {
1182 /* For relocs against symbols from removed linkonce sections,
1183 or sections discarded by a linker script, we just want the
1184 section contents zeroed. Avoid any special processing. */
1185 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1186 rel->r_info = 0;
1187 rel->r_addend = 0;
1188 continue;
1189 }
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_section_by_name (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_section_by_name (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 != 0
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 (input_bfd, 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 struct elf_cris_link_hash_table *htab;
1591 htab = elf_cris_hash_table (info);
1592 osec = htab->root.text_index_section;
1593 indx = elf_section_data (osec)->dynindx;
1594 }
1595 BFD_ASSERT (indx != 0);
1596 }
1597
1598 outrel.r_info = ELF32_R_INFO (indx, r_type);
1599 }
1600 }
1601
1602 loc = sreloc->contents;
1603 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1604 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1605
1606 /* This reloc will be computed at runtime, so there's no
1607 need to do anything now, except for R_CRIS_32 relocations
1608 that have been turned into R_CRIS_RELATIVE. */
1609 if (!relocate)
1610 continue;
1611 }
1612
1613 break;
1614
1615 case R_CRIS_16_DTPREL:
1616 case R_CRIS_32_DTPREL:
1617 /* This relocation must only be performed against local
1618 symbols, or to sections that are not loadable. It's also
1619 ok when we link a program and the symbol is defined in an
1620 ordinary (non-DSO) object (if it's undefined there, we've
1621 already seen an error). */
1622 if (h != NULL
1623 && (input_section->flags & SEC_ALLOC) != 0
1624 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1625 && (info->shared
1626 || (!h->def_regular
1627 && h->root.type != bfd_link_hash_undefined)))
1628 {
1629 (*_bfd_error_handler)
1630 ((h->root.type == bfd_link_hash_undefined)
1631 /* We shouldn't get here for GCC-emitted code. */
1632 ? _("%B, section %A: relocation %s has an undefined"
1633 " reference to `%s', perhaps a declaration mixup?")
1634 : ("%B, section %A: relocation %s is"
1635 " not allowed for `%s', a global symbol with default"
1636 " visibility, perhaps a declaration mixup?"),
1637 input_bfd,
1638 input_section,
1639 cris_elf_howto_table[r_type].name,
1640 symname != NULL && symname[0] != '\0'
1641 ? symname : _("[whose name is lost]"));
1642 bfd_set_error (bfd_error_bad_value);
1643 return FALSE;
1644 }
1645
1646 BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1647 || elf_cris_hash_table (info)->dtpmod_refcount != 0);
1648
1649 /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1650 already done so. Note that we do this in .got.plt, not
1651 in .got, as .got.plt contains the first part, still the
1652 reloc is against .got, because the linker script directs
1653 (is required to direct) them both into .got. */
1654 if (elf_cris_hash_table (info)->dtpmod_refcount > 0
1655 && (input_section->flags & SEC_ALLOC) != 0)
1656 {
1657 asection *sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1658 BFD_ASSERT (sgotplt != NULL);
1659
1660 if (info->shared)
1661 {
1662 Elf_Internal_Rela outrel;
1663 bfd_byte *loc;
1664
1665 if (srelgot == NULL)
1666 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1667 BFD_ASSERT (srelgot != NULL);
1668 loc = srelgot->contents;
1669 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1670
1671 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1672 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1673 outrel.r_offset = (sgotplt->output_section->vma
1674 + sgotplt->output_offset
1675 + 12);
1676 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1677 outrel.r_addend = 0;
1678 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1679 }
1680 else
1681 {
1682 /* For an executable, the GOT entry contents is known. */
1683 bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1684 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1685 }
1686
1687 /* Reverse the sign to mark that we've emitted the
1688 required GOT entry. */
1689 elf_cris_hash_table (info)->dtpmod_refcount
1690 = -elf_cris_hash_table (info)->dtpmod_refcount;
1691 }
1692
1693 /* The thread-based offset to the local symbol is the
1694 relocation.
1695 For the executable, TLS data begins at the thread pointer plus
1696 the negative size of the TLS data. For a DSO, that's part of
1697 the module TLS offset. */
1698 relocation -= elf_hash_table (info)->tls_sec == NULL
1699 ? 0 : (elf_hash_table (info)->tls_sec->vma
1700 + (info->shared
1701 ? 0 : elf_hash_table (info)->tls_size));
1702 break;
1703
1704 case R_CRIS_32_GD:
1705 if (info->shared)
1706 {
1707 bfd_set_error (bfd_error_invalid_operation);
1708
1709 /* We've already informed in cris_elf_check_relocs that
1710 this is an error. */
1711 return FALSE;
1712 }
1713 /* Fall through. */
1714
1715 case R_CRIS_16_GOT_GD:
1716 case R_CRIS_32_GOT_GD:
1717 if (rel->r_addend != 0)
1718 {
1719 /* We can't do anything for a relocation which is against a
1720 symbol *plus offset*. The GOT holds relocations for
1721 symbols. Make this an error; the compiler isn't allowed
1722 to pass us these kinds of things. */
1723 (*_bfd_error_handler)
1724 (_("%B, section %A: relocation %s with non-zero addend %d"
1725 " against symbol `%s'"),
1726 input_bfd,
1727 input_section,
1728 cris_elf_howto_table[r_type].name,
1729 rel->r_addend,
1730 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1731
1732 bfd_set_error (bfd_error_bad_value);
1733 return FALSE;
1734 }
1735
1736 if (!info->shared
1737 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1738 {
1739 /* Known contents of the GOT. */
1740 bfd_vma off;
1741
1742 /* The symbol is defined in the program, so just write
1743 (1, known_tpoffset) into the GOT. */
1744 relocation -= elf_hash_table (info)->tls_sec->vma;
1745
1746 if (h != NULL)
1747 {
1748 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1749 ? h->got.offset + 4 : h->got.offset;
1750 }
1751 else
1752 {
1753 off = local_got_offsets[r_symndx];
1754 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1755 off += 4;
1756 }
1757
1758 /* We use bit 1 of the offset as a flag for GOT entry with
1759 the R_CRIS_DTP reloc, setting it when we've emitted the
1760 GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL
1761 relocs. */
1762 if ((off & 2) == 0)
1763 {
1764 off &= ~3;
1765
1766 if (h != NULL)
1767 h->got.offset |= 2;
1768 else
1769 local_got_offsets[r_symndx] |= 2;
1770
1771 bfd_put_32 (output_bfd, 1, sgot->contents + off);
1772 bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1773 }
1774 else
1775 off &= ~3;
1776
1777 relocation = sgot->output_offset + off
1778 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1779 }
1780 else
1781 {
1782 /* Not all parts of the GOT entry are known; emit a real
1783 relocation. */
1784 bfd_vma off;
1785
1786 if (h != NULL)
1787 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1788 ? h->got.offset + 4 : h->got.offset;
1789 else
1790 {
1791 off = local_got_offsets[r_symndx];
1792 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1793 off += 4;
1794 }
1795
1796 /* See above re bit 1 and bit 0 usage. */
1797 if ((off & 2) == 0)
1798 {
1799 Elf_Internal_Rela outrel;
1800 bfd_byte *loc;
1801
1802 off &= ~3;
1803
1804 if (h != NULL)
1805 h->got.offset |= 2;
1806 else
1807 local_got_offsets[r_symndx] |= 2;
1808
1809 /* Clear the target contents of the GOT (just as a
1810 gesture; it's already cleared on allocation): this
1811 relocation is not like the other dynrelocs. */
1812 bfd_put_32 (output_bfd, 0, sgot->contents + off);
1813 bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1814
1815 if (srelgot == NULL)
1816 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1817 BFD_ASSERT (srelgot != NULL);
1818
1819 if (h != NULL && h->dynindx != -1)
1820 {
1821 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1822 relocation = 0;
1823 }
1824 else
1825 {
1826 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1827
1828 /* NULL if we had an error. */
1829 relocation -= elf_hash_table (info)->tls_sec == NULL
1830 ? 0 : elf_hash_table (info)->tls_sec->vma;
1831 }
1832
1833 outrel.r_offset = (sgot->output_section->vma
1834 + sgot->output_offset
1835 + off);
1836 outrel.r_addend = relocation;
1837 loc = srelgot->contents;
1838 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1839
1840 /* NULL if we had an error. */
1841 if (srelgot->contents != NULL)
1842 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1843 }
1844 else
1845 off &= ~3;
1846
1847 relocation = sgot->output_offset + off
1848 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1849 }
1850
1851 /* The GOT-relative offset to the GOT entry is the
1852 relocation, or for R_CRIS_32_GD, the actual address of
1853 the GOT entry. */
1854 break;
1855
1856 case R_CRIS_32_IE:
1857 if (info->shared)
1858 {
1859 bfd_set_error (bfd_error_invalid_operation);
1860
1861 /* We've already informed in cris_elf_check_relocs that
1862 this is an error. */
1863 return FALSE;
1864 }
1865 /* Fall through. */
1866
1867 case R_CRIS_32_GOT_TPREL:
1868 case R_CRIS_16_GOT_TPREL:
1869 if (rel->r_addend != 0)
1870 {
1871 /* We can't do anything for a relocation which is
1872 against a symbol *plus offset*. GOT holds
1873 relocations for symbols. Make this an error; the
1874 compiler isn't allowed to pass us these kinds of
1875 things. */
1876 (*_bfd_error_handler)
1877 (_("%B, section %A: relocation %s with non-zero addend %d"
1878 " against symbol `%s'"),
1879 input_bfd,
1880 input_section,
1881 cris_elf_howto_table[r_type].name,
1882 rel->r_addend,
1883 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1884 bfd_set_error (bfd_error_bad_value);
1885 return FALSE;
1886 }
1887
1888 if (!info->shared && (h == NULL || h->def_regular))
1889 {
1890 /* Known contents of the GOT. */
1891 bfd_vma off;
1892
1893 /* The symbol is defined in the program, so just write
1894 the -prog_tls_size+known_tpoffset into the GOT. */
1895 relocation -= elf_hash_table (info)->tls_sec->vma;
1896 relocation -= elf_hash_table (info)->tls_size;
1897
1898 if (h != NULL)
1899 off = h->got.offset;
1900 else
1901 off = local_got_offsets[r_symndx];
1902
1903 /* Bit 0 is used to mark whether we've emitted the required
1904 entry (and if needed R_CRIS_32_TPREL reloc). Bit 1
1905 is used similarly for R_CRIS_DTP, see above. */
1906 if ((off & 1) == 0)
1907 {
1908 off &= ~3;
1909
1910 if (h != NULL)
1911 h->got.offset |= 1;
1912 else
1913 local_got_offsets[r_symndx] |= 1;
1914
1915 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1916 }
1917 else
1918 off &= ~3;
1919
1920 relocation = sgot->output_offset + off
1921 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1922 }
1923 else
1924 {
1925 /* Emit a real relocation. */
1926 bfd_vma off;
1927
1928 if (h != NULL)
1929 off = h->got.offset;
1930 else
1931 off = local_got_offsets[r_symndx];
1932
1933 /* See above re usage of bit 0 and 1. */
1934 if ((off & 1) == 0)
1935 {
1936 Elf_Internal_Rela outrel;
1937 bfd_byte *loc;
1938
1939 off &= ~3;
1940
1941 if (h != NULL)
1942 h->got.offset |= 1;
1943 else
1944 local_got_offsets[r_symndx] |= 1;
1945
1946 if (srelgot == NULL)
1947 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1948 BFD_ASSERT (srelgot != NULL);
1949
1950 if (h != NULL && h->dynindx != -1)
1951 {
1952 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1953 relocation = 0;
1954 }
1955 else
1956 {
1957 outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1958
1959 /* NULL if we had an error. */
1960 relocation -= elf_hash_table (info)->tls_sec == NULL
1961 ? 0 : elf_hash_table (info)->tls_sec->vma;
1962 }
1963
1964 /* Just "define" the initial contents in some
1965 semi-logical way. */
1966 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1967
1968 outrel.r_offset = (sgot->output_section->vma
1969 + sgot->output_offset
1970 + off);
1971 outrel.r_addend = relocation;
1972 loc = srelgot->contents;
1973 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1974 /* NULL if we had an error. */
1975 if (srelgot->contents != NULL)
1976 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1977 }
1978 else
1979 off &= ~3;
1980
1981 relocation = sgot->output_offset + off
1982 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1983 }
1984
1985 /* The GOT-relative offset to the GOT entry is the relocation,
1986 or for R_CRIS_32_GD, the actual address of the GOT entry. */
1987 break;
1988
1989 case R_CRIS_16_TPREL:
1990 case R_CRIS_32_TPREL:
1991 /* This relocation must only be performed against symbols
1992 defined in an ordinary (non-DSO) object. */
1993 if (info->shared)
1994 {
1995 bfd_set_error (bfd_error_invalid_operation);
1996
1997 /* We've already informed in cris_elf_check_relocs that
1998 this is an error. */
1999 return FALSE;
2000 }
2001
2002 if (h != NULL
2003 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2004 && !(h->def_regular || ELF_COMMON_DEF_P (h))
2005 /* If it's undefined, then an error message has already
2006 been emitted. */
2007 && h->root.type != bfd_link_hash_undefined)
2008 {
2009 (*_bfd_error_handler)
2010 (_("%B, section %A: relocation %s is"
2011 " not allowed for symbol: `%s'"
2012 " which is defined outside the program,"
2013 " perhaps a declaration mixup?"),
2014 input_bfd,
2015 input_section,
2016 cris_elf_howto_table[r_type].name,
2017 symname);
2018 bfd_set_error (bfd_error_bad_value);
2019 return FALSE;
2020 }
2021
2022 /* NULL if we had an error. */
2023 relocation -= elf_hash_table (info)->tls_sec == NULL
2024 ? 0
2025 : (elf_hash_table (info)->tls_sec->vma
2026 + elf_hash_table (info)->tls_size);
2027
2028 /* The TLS-relative offset is the relocation. */
2029 break;
2030
2031 default:
2032 BFD_FAIL ();
2033 return FALSE;
2034 }
2035
2036 r = cris_final_link_relocate (howto, input_bfd, input_section,
2037 contents, rel, relocation);
2038
2039 if (r != bfd_reloc_ok)
2040 {
2041 const char * msg = (const char *) NULL;
2042
2043 switch (r)
2044 {
2045 case bfd_reloc_overflow:
2046 r = info->callbacks->reloc_overflow
2047 (info, (h ? &h->root : NULL), symname, howto->name,
2048 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
2049 if (additional_relocation_error_msg_count > 0)
2050 {
2051 additional_relocation_error_msg_count--;
2052 switch (r_type)
2053 {
2054 case R_CRIS_16_GOTPLT:
2055 case R_CRIS_16_GOT:
2056
2057 /* Not just TLS is involved here, so we make
2058 generation and message depend on -fPIC/-fpic
2059 only. */
2060 case R_CRIS_16_GOT_TPREL:
2061 case R_CRIS_16_GOT_GD:
2062 (*_bfd_error_handler)
2063 (_("(too many global variables for -fpic:"
2064 " recompile with -fPIC)"));
2065 break;
2066
2067 case R_CRIS_16_TPREL:
2068 case R_CRIS_16_DTPREL:
2069 (*_bfd_error_handler)
2070 (_("(thread-local data too big for -fpic or"
2071 " -msmall-tls: recompile with -fPIC or"
2072 " -mno-small-tls)"));
2073 break;
2074
2075 /* No known cause for overflow for other relocs. */
2076 default:
2077 break;
2078 }
2079 }
2080 break;
2081
2082 case bfd_reloc_undefined:
2083 r = info->callbacks->undefined_symbol
2084 (info, symname, input_bfd, input_section, rel->r_offset,
2085 TRUE);
2086 break;
2087
2088 case bfd_reloc_outofrange:
2089 msg = _("internal error: out of range error");
2090 break;
2091
2092 case bfd_reloc_notsupported:
2093 msg = _("internal error: unsupported relocation error");
2094 break;
2095
2096 case bfd_reloc_dangerous:
2097 msg = _("internal error: dangerous relocation");
2098 break;
2099
2100 default:
2101 msg = _("internal error: unknown error");
2102 break;
2103 }
2104
2105 if (msg)
2106 r = info->callbacks->warning
2107 (info, msg, symname, input_bfd, input_section, rel->r_offset);
2108
2109 if (! r)
2110 return FALSE;
2111 }
2112 }
2113
2114 return TRUE;
2115 }
2116
2117 /* Finish up dynamic symbol handling. We set the contents of various
2118 dynamic sections here. */
2119
2120 static bfd_boolean
2121 elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym)
2122 bfd *output_bfd;
2123 struct bfd_link_info *info;
2124 struct elf_link_hash_entry *h;
2125 Elf_Internal_Sym *sym;
2126 {
2127 bfd *dynobj;
2128
2129 /* Where in the plt entry to put values. */
2130 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2131
2132 /* What offset to add to the distance to the first PLT entry for the
2133 value at plt_off3. */
2134 int plt_off3_value_bias = 4;
2135
2136 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2137 for PIC and non-PIC for v32 and pre-v32). */
2138 int plt_stub_offset = 8;
2139 int plt_entry_size = PLT_ENTRY_SIZE;
2140 const bfd_byte *plt_entry = elf_cris_plt_entry;
2141 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2142
2143 /* Adjust the various PLT entry offsets. */
2144 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2145 {
2146 plt_off2 = 14;
2147 plt_off3 = 20;
2148 plt_off3_value_bias = -2;
2149 plt_stub_offset = 12;
2150 plt_entry_size = PLT_ENTRY_SIZE_V32;
2151 plt_entry = elf_cris_plt_entry_v32;
2152 plt_pic_entry = elf_cris_pic_plt_entry_v32;
2153 }
2154
2155 dynobj = elf_hash_table (info)->dynobj;
2156
2157 if (h->plt.offset != (bfd_vma) -1)
2158 {
2159 asection *splt;
2160 asection *sgotplt;
2161 asection *sgot;
2162 asection *srela;
2163 bfd_vma got_base;
2164
2165 bfd_vma gotplt_offset
2166 = elf_cris_hash_entry (h)->gotplt_offset;
2167 Elf_Internal_Rela rela;
2168 bfd_byte *loc;
2169 bfd_boolean has_gotplt = gotplt_offset != 0;
2170
2171 /* Get the index in the .rela.plt relocations for the .got.plt
2172 entry that corresponds to this symbol.
2173 We have to count backwards here, and the result is only valid
2174 as an index into .rela.plt. We also have to undo the effect
2175 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2176 .got.plt) for which gotplt_offset is adjusted, because while
2177 that entry goes into .got.plt, its relocation goes into
2178 .rela.got, not .rela.plt. (It's not PLT-specific; not to be
2179 processed as part of the runtime lazy .rela.plt relocation).
2180 FIXME: There be literal constants here... */
2181 bfd_vma rela_plt_index
2182 = (elf_cris_hash_table (info)->dtpmod_refcount != 0
2183 ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2184
2185 /* Get the offset into the .got table of the entry that corresponds
2186 to this function. Note that we embed knowledge that "incoming"
2187 .got goes after .got.plt in the output without padding (pointer
2188 aligned). However, that knowledge is present in several other
2189 places too. */
2190 bfd_vma got_offset
2191 = (has_gotplt
2192 ? gotplt_offset
2193 : h->got.offset + elf_cris_hash_table(info)->next_gotplt_entry);
2194
2195 /* This symbol has an entry in the procedure linkage table. Set it
2196 up. */
2197
2198 BFD_ASSERT (h->dynindx != -1);
2199
2200 splt = bfd_get_section_by_name (dynobj, ".plt");
2201 sgot = bfd_get_section_by_name (dynobj, ".got");
2202 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2203 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
2204 BFD_ASSERT (splt != NULL && sgotplt != NULL
2205 && (! has_gotplt || srela != NULL));
2206
2207 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2208
2209 /* Fill in the entry in the procedure linkage table. */
2210 if (! info->shared)
2211 {
2212 memcpy (splt->contents + h->plt.offset, plt_entry,
2213 plt_entry_size);
2214
2215 /* We need to enter the absolute address of the GOT entry here. */
2216 bfd_put_32 (output_bfd, got_base + got_offset,
2217 splt->contents + h->plt.offset + plt_off1);
2218 }
2219 else
2220 {
2221 memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2222 plt_entry_size);
2223 bfd_put_32 (output_bfd, got_offset,
2224 splt->contents + h->plt.offset + plt_off1);
2225 }
2226
2227 /* Fill in the plt entry and make a relocation, if this is a "real"
2228 PLT entry. */
2229 if (has_gotplt)
2230 {
2231 /* Fill in the offset to the reloc table. */
2232 bfd_put_32 (output_bfd,
2233 rela_plt_index * sizeof (Elf32_External_Rela),
2234 splt->contents + h->plt.offset + plt_off2);
2235
2236 /* Fill in the offset to the first PLT entry, where to "jump". */
2237 bfd_put_32 (output_bfd,
2238 - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2239 splt->contents + h->plt.offset + plt_off3);
2240
2241 /* Fill in the entry in the global offset table with the address of
2242 the relocating stub. */
2243 bfd_put_32 (output_bfd,
2244 (splt->output_section->vma
2245 + splt->output_offset
2246 + h->plt.offset
2247 + plt_stub_offset),
2248 sgotplt->contents + got_offset);
2249
2250 /* Fill in the entry in the .rela.plt section. */
2251 rela.r_offset = (sgotplt->output_section->vma
2252 + sgotplt->output_offset
2253 + got_offset);
2254 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2255 rela.r_addend = 0;
2256 loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2257 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2258 }
2259
2260 if (!h->def_regular)
2261 {
2262 /* Mark the symbol as undefined, rather than as defined in
2263 the .plt section. Leave the value alone. */
2264 sym->st_shndx = SHN_UNDEF;
2265
2266 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
2267 know whether resetting the value is significant; if it really
2268 is, rather than a quirk or bug in the sparc port, then I
2269 believe we'd see this elsewhere. */
2270 /* If the symbol is weak, we do need to clear the value.
2271 Otherwise, the PLT entry would provide a definition for
2272 the symbol even if the symbol wasn't defined anywhere,
2273 and so the symbol would never be NULL. */
2274 if (!h->ref_regular_nonweak)
2275 sym->st_value = 0;
2276 }
2277 }
2278
2279 /* For an ordinary program, we emit .got relocs only for symbols that
2280 are in the dynamic-symbols table and are either defined by the
2281 program or are undefined weak symbols, or are function symbols
2282 where we do not output a PLT: the PLT reloc was output above and all
2283 references to the function symbol are redirected to the PLT. */
2284 if (h->got.offset != (bfd_vma) -1
2285 && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2286 && (info->shared
2287 || (h->dynindx != -1
2288 && h->plt.offset == (bfd_vma) -1
2289 && !h->def_regular
2290 && h->root.type != bfd_link_hash_undefweak)))
2291 {
2292 asection *sgot;
2293 asection *srela;
2294 Elf_Internal_Rela rela;
2295 bfd_byte *loc;
2296 bfd_byte *where;
2297
2298 /* This symbol has an entry in the global offset table. Set it up. */
2299
2300 sgot = bfd_get_section_by_name (dynobj, ".got");
2301 srela = bfd_get_section_by_name (dynobj, ".rela.got");
2302 BFD_ASSERT (sgot != NULL && srela != NULL);
2303
2304 rela.r_offset = (sgot->output_section->vma
2305 + sgot->output_offset
2306 + (h->got.offset &~ (bfd_vma) 1));
2307
2308 /* If this is a static link, or it is a -Bsymbolic link and the
2309 symbol is defined locally or was forced to be local because
2310 of a version file, we just want to emit a RELATIVE reloc.
2311 The entry in the global offset table will already have been
2312 initialized in the relocate_section function. */
2313 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2314 if (! elf_hash_table (info)->dynamic_sections_created
2315 || (info->shared
2316 && (info->symbolic || h->dynindx == -1)
2317 && h->def_regular))
2318 {
2319 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2320 rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2321 }
2322 else
2323 {
2324 bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2325 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2326 rela.r_addend = 0;
2327 }
2328
2329 loc = srela->contents;
2330 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2331 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2332 }
2333
2334 if (h->needs_copy)
2335 {
2336 asection *s;
2337 Elf_Internal_Rela rela;
2338 bfd_byte *loc;
2339
2340 /* This symbol needs a copy reloc. Set it up. */
2341
2342 BFD_ASSERT (h->dynindx != -1
2343 && (h->root.type == bfd_link_hash_defined
2344 || h->root.type == bfd_link_hash_defweak));
2345
2346 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2347 ".rela.bss");
2348 BFD_ASSERT (s != NULL);
2349
2350 rela.r_offset = (h->root.u.def.value
2351 + h->root.u.def.section->output_section->vma
2352 + h->root.u.def.section->output_offset);
2353 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2354 rela.r_addend = 0;
2355 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2356 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2357 }
2358
2359 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2360 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2361 || h == elf_hash_table (info)->hgot)
2362 sym->st_shndx = SHN_ABS;
2363
2364 return TRUE;
2365 }
2366
2367 /* Finish up the dynamic sections. Do *not* emit relocs here, as their
2368 offsets were changed, as part of -z combreloc handling, from those we
2369 computed. */
2370
2371 static bfd_boolean
2372 elf_cris_finish_dynamic_sections (output_bfd, info)
2373 bfd *output_bfd;
2374 struct bfd_link_info *info;
2375 {
2376 bfd *dynobj;
2377 asection *sgot;
2378 asection *sdyn;
2379
2380 dynobj = elf_hash_table (info)->dynobj;
2381
2382 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2383 BFD_ASSERT (sgot != NULL);
2384 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2385
2386 if (elf_hash_table (info)->dynamic_sections_created)
2387 {
2388 asection *splt;
2389 Elf32_External_Dyn *dyncon, *dynconend;
2390
2391 splt = bfd_get_section_by_name (dynobj, ".plt");
2392 BFD_ASSERT (splt != NULL && sdyn != NULL);
2393
2394 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2395 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2396 for (; dyncon < dynconend; dyncon++)
2397 {
2398 Elf_Internal_Dyn dyn;
2399 asection *s;
2400
2401 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2402
2403 switch (dyn.d_tag)
2404 {
2405 default:
2406 break;
2407
2408 case DT_PLTGOT:
2409 s = bfd_get_section_by_name (output_bfd, ".got");
2410 BFD_ASSERT (s != NULL);
2411 dyn.d_un.d_ptr = s->vma;
2412 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2413 break;
2414
2415 case DT_JMPREL:
2416 /* Yes, we *can* have a .plt and no .plt.rela, for instance
2417 if all symbols are found in the .got (not .got.plt). */
2418 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2419 dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
2420 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2421 break;
2422
2423 case DT_PLTRELSZ:
2424 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2425 if (s == NULL)
2426 dyn.d_un.d_val = 0;
2427 else
2428 dyn.d_un.d_val = s->size;
2429 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2430 break;
2431
2432 case DT_RELASZ:
2433 /* The procedure linkage table relocs (DT_JMPREL) should
2434 not be included in the overall relocs (DT_RELA).
2435 Therefore, we override the DT_RELASZ entry here to
2436 make it not include the JMPREL relocs. Since the
2437 linker script arranges for .rela.plt to follow all
2438 other relocation sections, we don't have to worry
2439 about changing the DT_RELA entry. */
2440 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2441 if (s != NULL)
2442 dyn.d_un.d_val -= s->size;
2443 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2444 break;
2445 }
2446 }
2447
2448 /* Fill in the first entry in the procedure linkage table. */
2449 if (splt->size > 0)
2450 {
2451 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2452 {
2453 if (info->shared)
2454 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2455 PLT_ENTRY_SIZE_V32);
2456 else
2457 {
2458 memcpy (splt->contents, elf_cris_plt0_entry_v32,
2459 PLT_ENTRY_SIZE_V32);
2460 bfd_put_32 (output_bfd,
2461 sgot->output_section->vma
2462 + sgot->output_offset + 4,
2463 splt->contents + 4);
2464
2465 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2466 = PLT_ENTRY_SIZE_V32;
2467 }
2468 }
2469 else
2470 {
2471 if (info->shared)
2472 memcpy (splt->contents, elf_cris_pic_plt0_entry,
2473 PLT_ENTRY_SIZE);
2474 else
2475 {
2476 memcpy (splt->contents, elf_cris_plt0_entry,
2477 PLT_ENTRY_SIZE);
2478 bfd_put_32 (output_bfd,
2479 sgot->output_section->vma
2480 + sgot->output_offset + 4,
2481 splt->contents + 6);
2482 bfd_put_32 (output_bfd,
2483 sgot->output_section->vma
2484 + sgot->output_offset + 8,
2485 splt->contents + 14);
2486
2487 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2488 = PLT_ENTRY_SIZE;
2489 }
2490 }
2491 }
2492 }
2493
2494 /* Fill in the first three entries in the global offset table. */
2495 if (sgot->size > 0)
2496 {
2497 if (sdyn == NULL)
2498 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2499 else
2500 bfd_put_32 (output_bfd,
2501 sdyn->output_section->vma + sdyn->output_offset,
2502 sgot->contents);
2503 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2504 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2505 }
2506
2507 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2508
2509 return TRUE;
2510 }
2511
2512 /* Return the section that should be marked against GC for a given
2513 relocation. */
2514
2515 static asection *
2516 cris_elf_gc_mark_hook (asection *sec,
2517 struct bfd_link_info *info,
2518 Elf_Internal_Rela *rel,
2519 struct elf_link_hash_entry *h,
2520 Elf_Internal_Sym *sym)
2521 {
2522 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2523 if (h != NULL)
2524 switch (r_type)
2525 {
2526 case R_CRIS_GNU_VTINHERIT:
2527 case R_CRIS_GNU_VTENTRY:
2528 return NULL;
2529
2530 default:
2531 break;
2532 }
2533
2534 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2535 }
2536
2537 /* Update the got entry reference counts for the section being removed. */
2538
2539 static bfd_boolean
2540 cris_elf_gc_sweep_hook (bfd *abfd,
2541 struct bfd_link_info *info,
2542 asection *sec,
2543 const Elf_Internal_Rela *relocs)
2544 {
2545 Elf_Internal_Shdr *symtab_hdr;
2546 struct elf_link_hash_entry **sym_hashes;
2547 bfd_signed_vma *local_got_refcounts;
2548 const Elf_Internal_Rela *rel, *relend;
2549 bfd *dynobj;
2550 asection *sgot;
2551 asection *srelgot;
2552
2553 if (info->relocatable)
2554 return TRUE;
2555
2556 dynobj = elf_hash_table (info)->dynobj;
2557 if (dynobj == NULL)
2558 return TRUE;
2559
2560 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2561 sym_hashes = elf_sym_hashes (abfd);
2562 local_got_refcounts = elf_local_got_refcounts (abfd);
2563
2564 sgot = bfd_get_section_by_name (dynobj, ".got");
2565 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2566
2567 relend = relocs + sec->reloc_count;
2568 for (rel = relocs; rel < relend; rel++)
2569 {
2570 unsigned long r_symndx;
2571 struct elf_link_hash_entry *h = NULL;
2572 bfd_signed_vma got_element_size = 4;
2573 bfd_signed_vma *specific_refcount = NULL;
2574 enum elf_cris_reloc_type r_type;
2575
2576 r_symndx = ELF32_R_SYM (rel->r_info);
2577 if (r_symndx >= symtab_hdr->sh_info)
2578 {
2579 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2580 while (h->root.type == bfd_link_hash_indirect
2581 || h->root.type == bfd_link_hash_warning)
2582 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2583 }
2584
2585 r_type = ELF32_R_TYPE (rel->r_info);
2586 switch (r_type)
2587 {
2588 case R_CRIS_32_GOT:
2589 case R_CRIS_16_GOT:
2590 case R_CRIS_16_GOTPLT:
2591 case R_CRIS_32_GOTPLT:
2592 specific_refcount = h != NULL
2593 ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount
2594 : &local_got_refcounts[LGOT_REG_NDX (r_symndx)];
2595 break;
2596
2597 case R_CRIS_32_GD:
2598 case R_CRIS_32_GOT_GD:
2599 case R_CRIS_16_GOT_GD:
2600 got_element_size = 8;
2601 specific_refcount = h != NULL
2602 ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount
2603 : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)];
2604 break;
2605
2606 case R_CRIS_32_IE:
2607 case R_CRIS_16_GOT_TPREL:
2608 case R_CRIS_32_GOT_TPREL:
2609 specific_refcount = h != NULL
2610 ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount
2611 : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)];
2612 break;
2613
2614 default:
2615 break;
2616 }
2617
2618 switch (r_type)
2619 {
2620 case R_CRIS_32_IE:
2621 case R_CRIS_32_GD:
2622 case R_CRIS_16_GOT_TPREL:
2623 case R_CRIS_32_GOT_TPREL:
2624 case R_CRIS_32_GOT_GD:
2625 case R_CRIS_16_GOT_GD:
2626 case R_CRIS_16_GOT:
2627 case R_CRIS_32_GOT:
2628 if (h != NULL)
2629 {
2630 /* If the counters are 0 when we got here, we've
2631 miscounted somehow somewhere, an internal error. */
2632 BFD_ASSERT (h->got.refcount > 0);
2633 --h->got.refcount;
2634
2635 BFD_ASSERT (*specific_refcount > 0);
2636 --*specific_refcount;
2637 if (*specific_refcount == 0)
2638 {
2639 /* We don't need the .got entry any more. */
2640 sgot->size -= got_element_size;
2641 srelgot->size -= sizeof (Elf32_External_Rela);
2642 }
2643 break;
2644 }
2645
2646 local_got_reloc:
2647 if (local_got_refcounts != NULL)
2648 {
2649 /* If the counters are 0 when we got here, we've
2650 miscounted somehow somewhere, an internal error. */
2651 BFD_ASSERT (local_got_refcounts[r_symndx] > 0);
2652 --local_got_refcounts[r_symndx];
2653
2654 BFD_ASSERT (*specific_refcount > 0);
2655 --*specific_refcount;
2656 if (*specific_refcount == 0)
2657 {
2658 /* We don't need the .got entry any more. */
2659 sgot->size -= got_element_size;
2660 if (info->shared)
2661 srelgot->size -= sizeof (Elf32_External_Rela);
2662 }
2663 }
2664 break;
2665
2666 case R_CRIS_16_GOTPLT:
2667 case R_CRIS_32_GOTPLT:
2668 /* For local symbols, treat these like GOT relocs. */
2669 if (h == NULL)
2670 goto local_got_reloc;
2671 /* Fall through. */
2672
2673 case R_CRIS_32_PLT_GOTREL:
2674 /* FIXME: We don't garbage-collect away the .got section. */
2675 if (local_got_refcounts != NULL)
2676 local_got_refcounts[-1]--;
2677 /* Fall through. */
2678
2679 case R_CRIS_8_PCREL:
2680 case R_CRIS_16_PCREL:
2681 case R_CRIS_32_PCREL:
2682 case R_CRIS_32_PLT_PCREL:
2683 if (h != NULL)
2684 {
2685 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2686 && h->plt.refcount > 0)
2687 --h->plt.refcount;
2688 }
2689 break;
2690
2691 case R_CRIS_32_DTPREL:
2692 /* This'd be a .dtpreld entry in e.g. debug info. */
2693 if ((sec->flags & SEC_ALLOC) == 0)
2694 break;
2695 /* Fall through. */
2696 case R_CRIS_16_DTPREL:
2697 elf_cris_hash_table (info)->dtpmod_refcount--;
2698 if (elf_cris_hash_table (info)->dtpmod_refcount == 0)
2699 elf_cris_hash_table (info)->next_gotplt_entry -= 8;
2700 BFD_ASSERT (local_got_refcounts != NULL);
2701 local_got_refcounts[-1]--;
2702 break;
2703
2704 default:
2705 break;
2706 }
2707 }
2708
2709 return TRUE;
2710 }
2711
2712 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2713 entry but we found we will not create any. Called when we find we will
2714 not have any PLT for this symbol, by for example
2715 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2716 or elf_cris_size_dynamic_sections if no dynamic sections will be
2717 created (we're only linking static objects). */
2718
2719 static bfd_boolean
2720 elf_cris_adjust_gotplt_to_got (h, p)
2721 struct elf_cris_link_hash_entry *h;
2722 PTR p;
2723 {
2724 struct bfd_link_info *info = (struct bfd_link_info *) p;
2725
2726 if (h->root.root.type == bfd_link_hash_warning)
2727 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
2728
2729 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2730 if (h->gotplt_refcount <= 0)
2731 return TRUE;
2732
2733 if (h->reg_got_refcount > 0)
2734 {
2735 /* There's a GOT entry for this symbol. Just adjust the refcounts.
2736 Probably not necessary at this stage, but keeping them accurate
2737 helps avoiding surprises later. */
2738 h->root.got.refcount += h->gotplt_refcount;
2739 h->reg_got_refcount += h->gotplt_refcount;
2740 h->gotplt_refcount = 0;
2741 }
2742 else
2743 {
2744 /* No GOT entry for this symbol. We need to create one. */
2745 bfd *dynobj = elf_hash_table (info)->dynobj;
2746 asection *sgot;
2747 asection *srelgot;
2748
2749 BFD_ASSERT (dynobj != NULL);
2750 sgot = bfd_get_section_by_name (dynobj, ".got");
2751 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2752
2753 /* Put accurate refcounts there. */
2754 h->root.got.refcount += h->gotplt_refcount;
2755 h->reg_got_refcount = h->gotplt_refcount;
2756
2757 h->gotplt_refcount = 0;
2758
2759 /* We always have a .got and a .rela.got section if there were
2760 GOTPLT relocs in input. */
2761 BFD_ASSERT (sgot != NULL && srelgot != NULL);
2762
2763 /* Allocate space in the .got section. */
2764 sgot->size += 4;
2765
2766 /* Allocate relocation space. */
2767 srelgot->size += sizeof (Elf32_External_Rela);
2768 }
2769
2770 return TRUE;
2771 }
2772
2773 /* Try to fold PLT entries with GOT entries. There are two cases when we
2774 want to do this:
2775
2776 - When all PLT references are GOTPLT references, and there are GOT
2777 references, and this is not the executable. We don't have to
2778 generate a PLT at all.
2779
2780 - When there are both (ordinary) PLT references and GOT references,
2781 and this isn't the executable.
2782 We want to make the PLT reference use the ordinary GOT entry rather
2783 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2784 since the GOT entry will have to be resolved at startup anyway.
2785
2786 Though the latter case is handled when room for the PLT is allocated,
2787 not here.
2788
2789 By folding into the GOT, we may need a round-trip to a PLT in the
2790 executable for calls, a loss in performance. Still, losing a
2791 reloc is a win in size and at least in start-up time.
2792
2793 Note that this function is called before symbols are forced local by
2794 version scripts. The differing cases are handled by
2795 elf_cris_hide_symbol. */
2796
2797 static bfd_boolean
2798 elf_cris_try_fold_plt_to_got (h, p)
2799 struct elf_cris_link_hash_entry *h;
2800 PTR p;
2801 {
2802 struct bfd_link_info *info = (struct bfd_link_info *) p;
2803
2804 /* If there are no GOT references for this symbol, we can't fold any
2805 other reference so there's nothing to do. Likewise if there are no
2806 PLT references; GOTPLT references included. */
2807 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2808 return TRUE;
2809
2810 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2811 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2812
2813 if (h->gotplt_refcount == h->root.plt.refcount)
2814 {
2815 /* The only PLT references are GOTPLT references, and there are GOT
2816 references. Convert PLT to GOT references. */
2817 if (! elf_cris_adjust_gotplt_to_got (h, info))
2818 return FALSE;
2819
2820 /* Clear the PLT references, so no PLT will be created. */
2821 h->root.plt.offset = (bfd_vma) -1;
2822 }
2823
2824 return TRUE;
2825 }
2826
2827 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2828 to use a GOT entry (and create one) rather than requiring a GOTPLT
2829 entry. */
2830
2831 static void
2832 elf_cris_hide_symbol (info, h, force_local)
2833 struct bfd_link_info *info;
2834 struct elf_link_hash_entry *h;
2835 bfd_boolean force_local;
2836 {
2837 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2838
2839 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2840 }
2841
2842 /* Adjust a symbol defined by a dynamic object and referenced by a
2843 regular object. The current definition is in some section of the
2844 dynamic object, but we're not including those sections. We have to
2845 change the definition to something the rest of the link can
2846 understand. */
2847
2848 static bfd_boolean
2849 elf_cris_adjust_dynamic_symbol (info, h)
2850 struct bfd_link_info *info;
2851 struct elf_link_hash_entry *h;
2852 {
2853 bfd *dynobj;
2854 asection *s;
2855 bfd_size_type plt_entry_size;
2856
2857 dynobj = elf_hash_table (info)->dynobj;
2858
2859 /* Make sure we know what is going on here. */
2860 BFD_ASSERT (dynobj != NULL
2861 && (h->needs_plt
2862 || h->u.weakdef != NULL
2863 || (h->def_dynamic
2864 && h->ref_regular
2865 && !h->def_regular)));
2866
2867 plt_entry_size
2868 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2869 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2870
2871 /* If this is a function, put it in the procedure linkage table. We
2872 will fill in the contents of the procedure linkage table later,
2873 when we know the address of the .got section. */
2874 if (h->type == STT_FUNC
2875 || h->needs_plt)
2876 {
2877 /* If we link a program (not a DSO), we'll get rid of unnecessary
2878 PLT entries; we point to the actual symbols -- even for pic
2879 relocs, because a program built with -fpic should have the same
2880 result as one built without -fpic, specifically considering weak
2881 symbols.
2882 FIXME: m68k and i386 differ here, for unclear reasons. */
2883 if (! info->shared
2884 && !h->def_dynamic)
2885 {
2886 /* This case can occur if we saw a PLT reloc in an input file,
2887 but the symbol was not defined by a dynamic object. In such
2888 a case, we don't actually need to build a procedure linkage
2889 table, and we can just do an absolute or PC reloc instead, or
2890 change a .got.plt index to a .got index for GOTPLT relocs. */
2891 BFD_ASSERT (h->needs_plt);
2892 h->needs_plt = 0;
2893 h->plt.offset = (bfd_vma) -1;
2894 return
2895 elf_cris_adjust_gotplt_to_got ((struct
2896 elf_cris_link_hash_entry *) h,
2897 info);
2898 }
2899
2900 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2901 where a pointer-equivalent symbol was unimportant (i.e. more
2902 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2903 of the PLT. We can't for the executable, because the GOT
2904 entries will point to the PLT there (and be constant). */
2905 if (info->shared
2906 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2907 h, info))
2908 return FALSE;
2909
2910 /* GC or folding may have rendered this entry unused. */
2911 if (h->plt.refcount <= 0)
2912 {
2913 h->needs_plt = 0;
2914 h->plt.offset = (bfd_vma) -1;
2915 return TRUE;
2916 }
2917
2918 /* Make sure this symbol is output as a dynamic symbol. */
2919 if (h->dynindx == -1)
2920 {
2921 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2922 return FALSE;
2923 }
2924
2925 s = bfd_get_section_by_name (dynobj, ".plt");
2926 BFD_ASSERT (s != NULL);
2927
2928 /* If this is the first .plt entry, make room for the special
2929 first entry. */
2930 if (s->size == 0)
2931 s->size += plt_entry_size;
2932
2933 /* If this symbol is not defined in a regular file, and we are
2934 not generating a shared library, then set the symbol to this
2935 location in the .plt. */
2936 if (!info->shared
2937 && !h->def_regular)
2938 {
2939 h->root.u.def.section = s;
2940 h->root.u.def.value = s->size;
2941 }
2942
2943 /* If there's already a GOT entry, use that, not a .got.plt. A
2944 GOT field still has a reference count when we get here; it's
2945 not yet changed to an offset. We can't do this for an
2946 executable, because then the reloc associated with the PLT
2947 would get a non-PLT reloc pointing to the PLT. FIXME: Move
2948 this to elf_cris_try_fold_plt_to_got. */
2949 if (info->shared && h->got.refcount > 0)
2950 {
2951 h->got.refcount += h->plt.refcount;
2952
2953 /* Mark the PLT offset to use the GOT entry by setting the low
2954 bit in the plt offset; it is always a multiple of
2955 plt_entry_size (which is at least a multiple of 2). */
2956 BFD_ASSERT ((s->size % plt_entry_size) == 0);
2957
2958 /* Change the PLT refcount to an offset. */
2959 h->plt.offset = s->size;
2960
2961 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2962 that the got entry should be used instead. */
2963 BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2964 h)->gotplt_offset == 0);
2965
2966 /* Make room for this entry. */
2967 s->size += plt_entry_size;
2968
2969 return TRUE;
2970 }
2971
2972 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2973 h->plt.offset = s->size;
2974
2975 /* Make room for this entry. */
2976 s->size += plt_entry_size;
2977
2978 /* We also need to make an entry in the .got.plt section, which
2979 will be placed in the .got section by the linker script. */
2980 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2981 = elf_cris_hash_table (info)->next_gotplt_entry;
2982 elf_cris_hash_table (info)->next_gotplt_entry += 4;
2983
2984 s = bfd_get_section_by_name (dynobj, ".got.plt");
2985 BFD_ASSERT (s != NULL);
2986 s->size += 4;
2987
2988 /* We also need to make an entry in the .rela.plt section. */
2989
2990 s = bfd_get_section_by_name (dynobj, ".rela.plt");
2991 BFD_ASSERT (s != NULL);
2992 s->size += sizeof (Elf32_External_Rela);
2993
2994 return TRUE;
2995 }
2996
2997 /* Reinitialize the plt offset now that it is not used as a reference
2998 count any more. */
2999 h->plt.offset = (bfd_vma) -1;
3000
3001 /* If this is a weak symbol, and there is a real definition, the
3002 processor independent code will have arranged for us to see the
3003 real definition first, and we can just use the same value. */
3004 if (h->u.weakdef != NULL)
3005 {
3006 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3007 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3008 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3009 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3010 return TRUE;
3011 }
3012
3013 /* This is a reference to a symbol defined by a dynamic object which
3014 is not a function. */
3015
3016 /* If we are creating a shared library, we must presume that the
3017 only references to the symbol are via the global offset table.
3018 For such cases we need not do anything here; the relocations will
3019 be handled correctly by relocate_section. */
3020 if (info->shared)
3021 return TRUE;
3022
3023 /* If there are no references to this symbol that do not use the
3024 GOT, we don't need to generate a copy reloc. */
3025 if (!h->non_got_ref)
3026 return TRUE;
3027
3028 if (h->size == 0)
3029 {
3030 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
3031 h->root.root.string);
3032 return TRUE;
3033 }
3034
3035 /* We must allocate the symbol in our .dynbss section, which will
3036 become part of the .bss section of the executable. There will be
3037 an entry for this symbol in the .dynsym section. The dynamic
3038 object will contain position independent code, so all references
3039 from the dynamic object to this symbol will go through the global
3040 offset table. The dynamic linker will use the .dynsym entry to
3041 determine the address it must put in the global offset table, so
3042 both the dynamic object and the regular object will refer to the
3043 same memory location for the variable. */
3044
3045 s = bfd_get_section_by_name (dynobj, ".dynbss");
3046 BFD_ASSERT (s != NULL);
3047
3048 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
3049 copy the initial value out of the dynamic object and into the
3050 runtime process image. We need to remember the offset into the
3051 .rela.bss section we are going to use. */
3052 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3053 {
3054 asection *srel;
3055
3056 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
3057 BFD_ASSERT (srel != NULL);
3058 srel->size += sizeof (Elf32_External_Rela);
3059 h->needs_copy = 1;
3060 }
3061
3062 return _bfd_elf_adjust_dynamic_copy (h, s);
3063 }
3064
3065 /* Adjust our "subclass" elements for an indirect symbol. */
3066
3067 static void
3068 elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
3069 struct elf_link_hash_entry *dir,
3070 struct elf_link_hash_entry *ind)
3071 {
3072 struct elf_cris_link_hash_entry *edir, *eind;
3073
3074 edir = (struct elf_cris_link_hash_entry *) dir;
3075 eind = (struct elf_cris_link_hash_entry *) ind;
3076
3077 /* Only indirect symbols are replaced; we're not interested in
3078 updating any of EIND's fields for other symbols. */
3079 if (eind->root.root.type != bfd_link_hash_indirect)
3080 {
3081 /* Still, we need to copy flags for e.g. weak definitions. */
3082 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3083 return;
3084 }
3085
3086 BFD_ASSERT (edir->pcrel_relocs_copied == NULL);
3087 BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
3088
3089 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
3090 #define XMOVE(F) XMOVOPZ (F, +=, 0)
3091 XMOVOPZ (pcrel_relocs_copied, =, NULL);
3092 XMOVE (gotplt_refcount);
3093 XMOVE (gotplt_offset);
3094 XMOVE (reg_got_refcount);
3095 XMOVE (tprel_refcount);
3096 XMOVE (dtp_refcount);
3097 #undef XMOVE
3098 #undef XMOVOPZ
3099
3100 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3101 }
3102
3103 /* Look through the relocs for a section during the first phase. */
3104
3105 static bfd_boolean
3106 cris_elf_check_relocs (abfd, info, sec, relocs)
3107 bfd *abfd;
3108 struct bfd_link_info *info;
3109 asection *sec;
3110 const Elf_Internal_Rela *relocs;
3111 {
3112 bfd *dynobj;
3113 Elf_Internal_Shdr *symtab_hdr;
3114 struct elf_link_hash_entry **sym_hashes;
3115 bfd_signed_vma *local_got_refcounts;
3116 const Elf_Internal_Rela *rel;
3117 const Elf_Internal_Rela *rel_end;
3118 asection *sgot;
3119 asection *srelgot;
3120 asection *sreloc;
3121
3122 if (info->relocatable)
3123 return TRUE;
3124
3125 dynobj = elf_hash_table (info)->dynobj;
3126 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3127 sym_hashes = elf_sym_hashes (abfd);
3128 local_got_refcounts = elf_local_got_refcounts (abfd);
3129
3130 sgot = NULL;
3131 srelgot = NULL;
3132 sreloc = NULL;
3133
3134 rel_end = relocs + sec->reloc_count;
3135 for (rel = relocs; rel < rel_end; rel++)
3136 {
3137 struct elf_link_hash_entry *h;
3138 unsigned long r_symndx;
3139 enum elf_cris_reloc_type r_type;
3140 bfd_signed_vma got_element_size = 4;
3141 unsigned long r_symndx_lgot = INT_MAX;
3142
3143 r_symndx = ELF32_R_SYM (rel->r_info);
3144 if (r_symndx < symtab_hdr->sh_info)
3145 {
3146 h = NULL;
3147 r_symndx_lgot = LGOT_REG_NDX (r_symndx);
3148 }
3149 else
3150 {
3151 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3152 while (h->root.type == bfd_link_hash_indirect
3153 || h->root.type == bfd_link_hash_warning)
3154 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3155 }
3156
3157 r_type = ELF32_R_TYPE (rel->r_info);
3158
3159 /* Some relocs require linker-created sections; we need to hang them
3160 on the first input bfd we found that contained dynamic relocs. */
3161 switch (r_type)
3162 {
3163 case R_CRIS_32_DTPREL:
3164 if ((sec->flags & SEC_ALLOC) == 0)
3165 /* This'd be a .dtpreld entry in e.g. debug info. We have
3166 several different switch statements below, but none of
3167 that is needed; we need no preparations for resolving
3168 R_CRIS_32_DTPREL into a non-allocated section (debug
3169 info), so let's just move on to the next
3170 relocation. */
3171 continue;
3172 /* Fall through. */
3173 case R_CRIS_16_DTPREL:
3174 /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3175 entry at index 3. */
3176 if (elf_cris_hash_table (info)->dtpmod_refcount == 0)
3177 elf_cris_hash_table (info)->next_gotplt_entry += 8;
3178 elf_cris_hash_table (info)->dtpmod_refcount++;
3179 /* Fall through. */
3180
3181 case R_CRIS_32_IE:
3182 case R_CRIS_32_GD:
3183 case R_CRIS_16_GOT_GD:
3184 case R_CRIS_32_GOT_GD:
3185 case R_CRIS_32_GOT_TPREL:
3186 case R_CRIS_16_GOT_TPREL:
3187 case R_CRIS_16_GOT:
3188 case R_CRIS_32_GOT:
3189 case R_CRIS_32_GOTREL:
3190 case R_CRIS_32_PLT_GOTREL:
3191 case R_CRIS_32_PLT_PCREL:
3192 case R_CRIS_16_GOTPLT:
3193 case R_CRIS_32_GOTPLT:
3194 if (dynobj == NULL)
3195 {
3196 elf_hash_table (info)->dynobj = dynobj = abfd;
3197
3198 /* We could handle this if we can get a handle on the
3199 output bfd in elf_cris_adjust_dynamic_symbol. Failing
3200 that, we must insist on dynobj being a specific mach. */
3201 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3202 {
3203 (*_bfd_error_handler)
3204 (_("%B, section %A:\n v10/v32 compatible object %s"
3205 " must not contain a PIC relocation"),
3206 abfd, sec);
3207 return FALSE;
3208 }
3209
3210 /* Create the .got section, so we can assume it's always
3211 present whenever there's a dynobj. */
3212 if (!_bfd_elf_create_got_section (dynobj, info))
3213 return FALSE;
3214 }
3215
3216 if (sgot == NULL)
3217 sgot = bfd_get_section_by_name (dynobj, ".got");
3218
3219 if (local_got_refcounts == NULL)
3220 {
3221 bfd_size_type amt;
3222
3223 /* We use index local_got_refcounts[-1] to count all
3224 GOT-relative relocations that do not have explicit
3225 GOT entries. */
3226 amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3227 amt *= sizeof (bfd_signed_vma);
3228 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3229 if (local_got_refcounts == NULL)
3230 return FALSE;
3231
3232 local_got_refcounts++;
3233 elf_local_got_refcounts (abfd) = local_got_refcounts;
3234 }
3235 break;
3236
3237 default:
3238 break;
3239 }
3240
3241 /* Some relocs require a global offset table (but perhaps not a
3242 specific GOT entry). */
3243 switch (r_type)
3244 {
3245 case R_CRIS_16_DTPREL:
3246 case R_CRIS_32_DTPREL:
3247 /* Not requesting .got.rela for an executable: the contents
3248 of the first entry is constant there. For a shared
3249 library, we need .got.rela for the R_CRIS_DTPMOD
3250 relocation at index 3. */
3251 if (!info->shared)
3252 break;
3253 /* Fall through. */
3254
3255 case R_CRIS_32_IE:
3256 case R_CRIS_32_GD:
3257 case R_CRIS_16_GOT_GD:
3258 case R_CRIS_32_GOT_GD:
3259 case R_CRIS_32_GOT_TPREL:
3260 case R_CRIS_16_GOT_TPREL:
3261 /* Fall through. */
3262
3263 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
3264 entry only for local symbols. Unfortunately, we don't know
3265 until later on if there's a version script that forces the
3266 symbol local. We must have the .rela.got section in place
3267 before we know if the symbol looks global now, so we need
3268 to treat the reloc just like for R_CRIS_16_GOT and
3269 R_CRIS_32_GOT. */
3270 case R_CRIS_16_GOTPLT:
3271 case R_CRIS_32_GOTPLT:
3272 case R_CRIS_16_GOT:
3273 case R_CRIS_32_GOT:
3274 if (srelgot == NULL
3275 && (h != NULL || info->shared))
3276 {
3277 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3278 if (srelgot == NULL)
3279 {
3280 srelgot = bfd_make_section_with_flags (dynobj,
3281 ".rela.got",
3282 (SEC_ALLOC
3283 | SEC_LOAD
3284 | SEC_HAS_CONTENTS
3285 | SEC_IN_MEMORY
3286 | SEC_LINKER_CREATED
3287 | SEC_READONLY));
3288 if (srelgot == NULL
3289 || !bfd_set_section_alignment (dynobj, srelgot, 2))
3290 return FALSE;
3291 }
3292 }
3293 break;
3294
3295 default:
3296 break;
3297 }
3298
3299 /* Warn and error for invalid input. */
3300 switch (r_type)
3301 {
3302 case R_CRIS_32_IE:
3303 case R_CRIS_32_TPREL:
3304 case R_CRIS_16_TPREL:
3305 case R_CRIS_32_GD:
3306 if (info->shared)
3307 {
3308 (*_bfd_error_handler)
3309 (_("%B, section %A:\n relocation %s not valid"
3310 " in a shared object;"
3311 " typically an option mixup, recompile with -fPIC"),
3312 abfd,
3313 sec,
3314 cris_elf_howto_table[r_type].name);
3315 /* Don't return FALSE here; we want messages for all of
3316 these and the error behavior is ungraceful
3317 anyway. */
3318 }
3319 default:
3320 break;
3321 }
3322
3323 switch (r_type)
3324 {
3325 case R_CRIS_32_GD:
3326 case R_CRIS_16_GOT_GD:
3327 case R_CRIS_32_GOT_GD:
3328 /* These are requests for tls_index entries, run-time R_CRIS_DTP. */
3329 got_element_size = 8;
3330 r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3331 break;
3332
3333 case R_CRIS_16_DTPREL:
3334 case R_CRIS_32_DTPREL:
3335 /* These two just request for the constant-index
3336 module-local tls_index-sized GOT entry, which we add
3337 elsewhere. */
3338 break;
3339
3340 case R_CRIS_32_IE:
3341 case R_CRIS_32_GOT_TPREL:
3342 case R_CRIS_16_GOT_TPREL:
3343 r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3344
3345 /* Those relocs also require that a DSO is of type
3346 Initial Exec. Like other targets, we don't reset this
3347 flag even if the relocs are GC:ed away. */
3348 if (info->shared)
3349 info->flags |= DF_STATIC_TLS;
3350 break;
3351
3352 /* Let's list the other assembler-generated TLS-relocs too,
3353 just to show that they're not forgotten. */
3354 case R_CRIS_16_TPREL:
3355 case R_CRIS_32_TPREL:
3356 default:
3357 break;
3358 }
3359
3360 switch (r_type)
3361 {
3362 case R_CRIS_16_GOTPLT:
3363 case R_CRIS_32_GOTPLT:
3364 /* Mark that we need a GOT entry if the PLT entry (and its GOT
3365 entry) is eliminated. We can only do this for a non-local
3366 symbol. */
3367 if (h != NULL)
3368 {
3369 elf_cris_hash_entry (h)->gotplt_refcount++;
3370 goto handle_gotplt_reloc;
3371 }
3372 /* If h is NULL then this is a local symbol, and we must make a
3373 GOT entry for it, so handle it like a GOT reloc. */
3374 /* Fall through. */
3375
3376 case R_CRIS_32_IE:
3377 case R_CRIS_32_GD:
3378 case R_CRIS_16_GOT_GD:
3379 case R_CRIS_32_GOT_GD:
3380 case R_CRIS_32_GOT_TPREL:
3381 case R_CRIS_16_GOT_TPREL:
3382 case R_CRIS_16_GOT:
3383 case R_CRIS_32_GOT:
3384 /* This symbol requires a global offset table entry. */
3385 if (h != NULL)
3386 {
3387 if (h->got.refcount == 0)
3388 {
3389 /* Make sure this symbol is output as a dynamic symbol. */
3390 if (h->dynindx == -1)
3391 {
3392 if (!bfd_elf_link_record_dynamic_symbol (info, h))
3393 return FALSE;
3394 }
3395 }
3396
3397 /* Update the sum of reloc counts for this symbol. */
3398 h->got.refcount++;
3399
3400 switch (r_type)
3401 {
3402 case R_CRIS_16_GOT:
3403 case R_CRIS_32_GOT:
3404 if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3405 {
3406 /* Allocate space in the .got section. */
3407 sgot->size += got_element_size;
3408 /* Allocate relocation space. */
3409 srelgot->size += sizeof (Elf32_External_Rela);
3410 }
3411 elf_cris_hash_entry (h)->reg_got_refcount++;
3412 break;
3413
3414 case R_CRIS_32_GD:
3415 case R_CRIS_16_GOT_GD:
3416 case R_CRIS_32_GOT_GD:
3417 if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3418 {
3419 /* Allocate space in the .got section. */
3420 sgot->size += got_element_size;
3421 /* Allocate relocation space. */
3422 srelgot->size += sizeof (Elf32_External_Rela);
3423 }
3424 elf_cris_hash_entry (h)->dtp_refcount++;
3425 break;
3426
3427 case R_CRIS_32_IE:
3428 case R_CRIS_32_GOT_TPREL:
3429 case R_CRIS_16_GOT_TPREL:
3430 if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3431 {
3432 /* Allocate space in the .got section. */
3433 sgot->size += got_element_size;
3434 /* Allocate relocation space. */
3435 srelgot->size += sizeof (Elf32_External_Rela);
3436 }
3437 elf_cris_hash_entry (h)->tprel_refcount++;
3438 break;
3439
3440 default:
3441 BFD_FAIL ();
3442 break;
3443 }
3444 }
3445 else
3446 {
3447 /* This is a global offset table entry for a local symbol. */
3448 if (local_got_refcounts[r_symndx_lgot] == 0)
3449 {
3450 sgot->size += got_element_size;
3451 if (info->shared)
3452 {
3453 /* If we are generating a shared object, we need
3454 to output a R_CRIS_RELATIVE reloc so that the
3455 dynamic linker can adjust this GOT entry.
3456 Similarly for non-regular got entries. */
3457 srelgot->size += sizeof (Elf32_External_Rela);
3458 }
3459 }
3460 /* Update the reloc-specific count. */
3461 local_got_refcounts[r_symndx_lgot]++;
3462
3463 /* This one is the sum of all the others. */
3464 local_got_refcounts[r_symndx]++;
3465 }
3466 break;
3467
3468 case R_CRIS_16_DTPREL:
3469 case R_CRIS_32_DTPREL:
3470 case R_CRIS_32_GOTREL:
3471 /* This reference requires a global offset table.
3472 FIXME: The actual refcount isn't used currently; the .got
3473 section can't be removed if there were any references in the
3474 input. */
3475 local_got_refcounts[-1]++;
3476 break;
3477
3478 handle_gotplt_reloc:
3479
3480 case R_CRIS_32_PLT_GOTREL:
3481 /* This reference requires a global offset table. */
3482 local_got_refcounts[-1]++;
3483 /* Fall through. */
3484
3485 case R_CRIS_32_PLT_PCREL:
3486 /* This symbol requires a procedure linkage table entry. We
3487 actually build the entry in adjust_dynamic_symbol,
3488 because this might be a case of linking PIC code which is
3489 never referenced by a dynamic object, in which case we
3490 don't need to generate a procedure linkage table entry
3491 after all. */
3492
3493 /* Beware: if we'd check for visibility of the symbol here
3494 (and not marking the need for a PLT when non-visible), we'd
3495 get into trouble with keeping handling consistent with
3496 regards to relocs found before definition and GOTPLT
3497 handling. Eliminable PLT entries will be dealt with later
3498 anyway. */
3499 if (h == NULL)
3500 continue;
3501
3502 h->needs_plt = 1;
3503 h->plt.refcount++;
3504 break;
3505
3506 case R_CRIS_8:
3507 case R_CRIS_16:
3508 case R_CRIS_32:
3509 /* Let's help debug shared library creation. Any of these
3510 relocs *can* be used in shared libs, but pages containing
3511 them cannot be shared, so they're not appropriate for
3512 common use. Don't warn for sections we don't care about,
3513 such as debug sections or non-constant sections. We
3514 can't help tables of (global) function pointers, for
3515 example, though they must be emitted in a (writable) data
3516 section to avoid having impure text sections. */
3517 if (info->shared
3518 && (sec->flags & SEC_ALLOC) != 0
3519 && (sec->flags & SEC_READONLY) != 0)
3520 {
3521 /* FIXME: How do we make this optionally a warning only? */
3522 (*_bfd_error_handler)
3523 (_("%B, section %A:\n relocation %s should not"
3524 " be used in a shared object; recompile with -fPIC"),
3525 abfd,
3526 sec,
3527 cris_elf_howto_table[r_type].name);
3528 }
3529 if (h != NULL)
3530 {
3531 h->non_got_ref = 1;
3532
3533 /* Make sure a plt entry is created for this symbol if it
3534 turns out to be a function defined by a dynamic object. */
3535 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3536 h->plt.refcount++;
3537 }
3538
3539 /* If we are creating a shared library and this is not a local
3540 symbol, we need to copy the reloc into the shared library.
3541 However when linking with -Bsymbolic and this is a global
3542 symbol which is defined in an object we are including in the
3543 link (i.e., DEF_REGULAR is set), then we can resolve the
3544 reloc directly. At this point we have not seen all the input
3545 files, so it is possible that DEF_REGULAR is not set now but
3546 will be set later (it is never cleared). In case of a weak
3547 definition, DEF_REGULAR may be cleared later by a strong
3548 definition in a shared library. We account for that
3549 possibility below by storing information in the relocs_copied
3550 field of the hash table entry. A similar situation occurs
3551 when creating shared libraries and symbol visibility changes
3552 render the symbol local. */
3553
3554 /* No need to do anything if we're not creating a shared object. */
3555 if (! info->shared)
3556 break;
3557
3558 /* We don't need to handle relocs into sections not going into
3559 the "real" output. */
3560 if ((sec->flags & SEC_ALLOC) == 0)
3561 break;
3562
3563 /* We may need to create a reloc section in the dynobj and made room
3564 for this reloc. */
3565 if (sreloc == NULL)
3566 {
3567 sreloc = _bfd_elf_make_dynamic_reloc_section
3568 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3569
3570 if (sreloc == NULL)
3571 return FALSE;