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Copy relocations against protected symbols
[deliverable/binutils-gdb.git] / bfd / elf32-cris.c
1 /* CRIS-specific support for 32-bit ELF.
2 Copyright (C) 2000-2014 Free Software Foundation, Inc.
3 Contributed by Axis Communications AB.
4 Written by Hans-Peter Nilsson, based on elf32-fr30.c
5 PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
23
24 #include "sysdep.h"
25 #include "bfd.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28 #include "elf/cris.h"
29 #include <limits.h>
30
31 bfd_reloc_status_type
32 cris_elf_pcrel_reloc (bfd *, arelent *, asymbol *, void *,
33 asection *, bfd *, char **);
34 static bfd_boolean
35 cris_elf_set_mach_from_flags (bfd *, unsigned long);
36
37 /* Forward declarations. */
38 static reloc_howto_type cris_elf_howto_table [] =
39 {
40 /* This reloc does nothing. */
41 HOWTO (R_CRIS_NONE, /* type */
42 0, /* rightshift */
43 2, /* size (0 = byte, 1 = short, 2 = long) */
44 32, /* bitsize */
45 FALSE, /* pc_relative */
46 0, /* bitpos */
47 complain_overflow_bitfield, /* complain_on_overflow */
48 bfd_elf_generic_reloc, /* special_function */
49 "R_CRIS_NONE", /* name */
50 FALSE, /* partial_inplace */
51 0, /* src_mask */
52 0, /* dst_mask */
53 FALSE), /* pcrel_offset */
54
55 /* An 8 bit absolute relocation. */
56 HOWTO (R_CRIS_8, /* type */
57 0, /* rightshift */
58 0, /* size (0 = byte, 1 = short, 2 = long) */
59 8, /* bitsize */
60 FALSE, /* pc_relative */
61 0, /* bitpos */
62 complain_overflow_bitfield, /* complain_on_overflow */
63 bfd_elf_generic_reloc, /* special_function */
64 "R_CRIS_8", /* name */
65 FALSE, /* partial_inplace */
66 0x0000, /* src_mask */
67 0x00ff, /* dst_mask */
68 FALSE), /* pcrel_offset */
69
70 /* A 16 bit absolute relocation. */
71 HOWTO (R_CRIS_16, /* type */
72 0, /* rightshift */
73 1, /* size (0 = byte, 1 = short, 2 = long) */
74 16, /* bitsize */
75 FALSE, /* pc_relative */
76 0, /* bitpos */
77 complain_overflow_bitfield, /* complain_on_overflow */
78 bfd_elf_generic_reloc, /* special_function */
79 "R_CRIS_16", /* name */
80 FALSE, /* partial_inplace */
81 0x00000000, /* src_mask */
82 0x0000ffff, /* dst_mask */
83 FALSE), /* pcrel_offset */
84
85 /* A 32 bit absolute relocation. */
86 HOWTO (R_CRIS_32, /* type */
87 0, /* rightshift */
88 2, /* size (0 = byte, 1 = short, 2 = long) */
89 32, /* bitsize */
90 FALSE, /* pc_relative */
91 0, /* bitpos */
92 /* We don't want overflow complaints for 64-bit vma builds
93 for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
94 32-bit ELF) where sym=0xc0001234.
95 Don't do this for the PIC relocs, as we don't expect to
96 see them with large offsets. */
97 complain_overflow_dont, /* complain_on_overflow */
98 bfd_elf_generic_reloc, /* special_function */
99 "R_CRIS_32", /* name */
100 FALSE, /* partial_inplace */
101 0x00000000, /* src_mask */
102 0xffffffff, /* dst_mask */
103 FALSE), /* pcrel_offset */
104
105 /* An 8 bit PC-relative relocation. */
106 HOWTO (R_CRIS_8_PCREL, /* type */
107 0, /* rightshift */
108 0, /* size (0 = byte, 1 = short, 2 = long) */
109 8, /* bitsize */
110 TRUE, /* pc_relative */
111 0, /* bitpos */
112 complain_overflow_bitfield, /* complain_on_overflow */
113 cris_elf_pcrel_reloc, /* special_function */
114 "R_CRIS_8_PCREL", /* name */
115 FALSE, /* partial_inplace */
116 0x0000, /* src_mask */
117 0x00ff, /* dst_mask */
118 TRUE), /* pcrel_offset */
119
120 /* A 16 bit PC-relative relocation. */
121 HOWTO (R_CRIS_16_PCREL, /* type */
122 0, /* rightshift */
123 1, /* size (0 = byte, 1 = short, 2 = long) */
124 16, /* bitsize */
125 TRUE, /* pc_relative */
126 0, /* bitpos */
127 complain_overflow_bitfield, /* complain_on_overflow */
128 cris_elf_pcrel_reloc, /* special_function */
129 "R_CRIS_16_PCREL", /* name */
130 FALSE, /* partial_inplace */
131 0x00000000, /* src_mask */
132 0x0000ffff, /* dst_mask */
133 TRUE), /* pcrel_offset */
134
135 /* A 32 bit PC-relative relocation. */
136 HOWTO (R_CRIS_32_PCREL, /* type */
137 0, /* rightshift */
138 2, /* size (0 = byte, 1 = short, 2 = long) */
139 32, /* bitsize */
140 TRUE, /* pc_relative */
141 0, /* bitpos */
142 complain_overflow_bitfield, /* complain_on_overflow */
143 cris_elf_pcrel_reloc, /* special_function */
144 "R_CRIS_32_PCREL", /* name */
145 FALSE, /* partial_inplace */
146 0x00000000, /* src_mask */
147 0xffffffff, /* dst_mask */
148 TRUE), /* pcrel_offset */
149
150 /* GNU extension to record C++ vtable hierarchy. */
151 HOWTO (R_CRIS_GNU_VTINHERIT, /* type */
152 0, /* rightshift */
153 2, /* size (0 = byte, 1 = short, 2 = long) */
154 0, /* bitsize */
155 FALSE, /* pc_relative */
156 0, /* bitpos */
157 complain_overflow_dont, /* complain_on_overflow */
158 NULL, /* special_function */
159 "R_CRIS_GNU_VTINHERIT", /* name */
160 FALSE, /* partial_inplace */
161 0, /* src_mask */
162 0, /* dst_mask */
163 FALSE), /* pcrel_offset */
164
165 /* GNU extension to record C++ vtable member usage. */
166 HOWTO (R_CRIS_GNU_VTENTRY, /* type */
167 0, /* rightshift */
168 2, /* size (0 = byte, 1 = short, 2 = long) */
169 0, /* bitsize */
170 FALSE, /* pc_relative */
171 0, /* bitpos */
172 complain_overflow_dont, /* complain_on_overflow */
173 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
174 "R_CRIS_GNU_VTENTRY", /* name */
175 FALSE, /* partial_inplace */
176 0, /* src_mask */
177 0, /* dst_mask */
178 FALSE), /* pcrel_offset */
179
180 /* This is used only by the dynamic linker. The symbol should exist
181 both in the object being run and in some shared library. The
182 dynamic linker copies the data addressed by the symbol from the
183 shared library into the object, because the object being
184 run has to have the data at some particular address. */
185 HOWTO (R_CRIS_COPY, /* type */
186 0, /* rightshift */
187 2, /* size (0 = byte, 1 = short, 2 = long) */
188 32, /* bitsize */
189 FALSE, /* pc_relative */
190 0, /* bitpos */
191 complain_overflow_bitfield, /* complain_on_overflow */
192 bfd_elf_generic_reloc, /* special_function */
193 "R_CRIS_COPY", /* name */
194 FALSE, /* partial_inplace */
195 0, /* src_mask */
196 0, /* dst_mask */
197 FALSE), /* pcrel_offset */
198
199 /* Like R_CRIS_32, but used when setting global offset table entries. */
200 HOWTO (R_CRIS_GLOB_DAT, /* type */
201 0, /* rightshift */
202 2, /* size (0 = byte, 1 = short, 2 = long) */
203 32, /* bitsize */
204 FALSE, /* pc_relative */
205 0, /* bitpos */
206 complain_overflow_bitfield, /* complain_on_overflow */
207 bfd_elf_generic_reloc, /* special_function */
208 "R_CRIS_GLOB_DAT", /* name */
209 FALSE, /* partial_inplace */
210 0, /* src_mask */
211 0xffffffff, /* dst_mask */
212 FALSE), /* pcrel_offset */
213
214 /* Marks a procedure linkage table entry for a symbol. */
215 HOWTO (R_CRIS_JUMP_SLOT, /* type */
216 0, /* rightshift */
217 2, /* size (0 = byte, 1 = short, 2 = long) */
218 32, /* bitsize */
219 FALSE, /* pc_relative */
220 0, /* bitpos */
221 complain_overflow_bitfield, /* complain_on_overflow */
222 bfd_elf_generic_reloc, /* special_function */
223 "R_CRIS_JUMP_SLOT", /* name */
224 FALSE, /* partial_inplace */
225 0, /* src_mask */
226 0, /* dst_mask */
227 FALSE), /* pcrel_offset */
228
229 /* Used only by the dynamic linker. When the object is run, this
230 longword is set to the load address of the object, plus the
231 addend. */
232 HOWTO (R_CRIS_RELATIVE, /* type */
233 0, /* rightshift */
234 2, /* size (0 = byte, 1 = short, 2 = long) */
235 32, /* bitsize */
236 FALSE, /* pc_relative */
237 0, /* bitpos */
238 complain_overflow_bitfield, /* complain_on_overflow */
239 bfd_elf_generic_reloc, /* special_function */
240 "R_CRIS_RELATIVE", /* name */
241 FALSE, /* partial_inplace */
242 0, /* src_mask */
243 0xffffffff, /* dst_mask */
244 FALSE), /* pcrel_offset */
245
246 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
247 HOWTO (R_CRIS_16_GOT, /* type */
248 0, /* rightshift */
249 1, /* size (0 = byte, 1 = short, 2 = long) */
250 16, /* bitsize */
251 FALSE, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_bitfield, /* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_CRIS_16_GOT", /* name */
256 FALSE, /* partial_inplace */
257 0, /* src_mask */
258 0xffff, /* dst_mask */
259 FALSE), /* pcrel_offset */
260
261 HOWTO (R_CRIS_32_GOT, /* 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_32_GOT", /* name */
270 FALSE, /* partial_inplace */
271 0, /* src_mask */
272 0xffffffff, /* dst_mask */
273 FALSE), /* pcrel_offset */
274
275 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
276 the GOT table for the symbol. */
277 HOWTO (R_CRIS_16_GOTPLT, /* type */
278 0, /* rightshift */
279 1, /* size (0 = byte, 1 = short, 2 = long) */
280 16, /* bitsize */
281 FALSE, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_bitfield, /* complain_on_overflow */
284 bfd_elf_generic_reloc, /* special_function */
285 "R_CRIS_16_GOTPLT", /* name */
286 FALSE, /* partial_inplace */
287 0, /* src_mask */
288 0xffff, /* dst_mask */
289 FALSE), /* pcrel_offset */
290
291 HOWTO (R_CRIS_32_GOTPLT, /* type */
292 0, /* rightshift */
293 2, /* size (0 = byte, 1 = short, 2 = long) */
294 32, /* bitsize */
295 FALSE, /* pc_relative */
296 0, /* bitpos */
297 complain_overflow_bitfield, /* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_CRIS_32_GOTPLT", /* name */
300 FALSE, /* partial_inplace */
301 0, /* src_mask */
302 0xffffffff, /* dst_mask */
303 FALSE), /* pcrel_offset */
304
305 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
306 be necessary. */
307 HOWTO (R_CRIS_32_GOTREL, /* type */
308 0, /* rightshift */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
310 32, /* bitsize */
311 FALSE, /* pc_relative */
312 0, /* bitpos */
313 complain_overflow_bitfield, /* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_CRIS_32_GOTREL", /* name */
316 FALSE, /* partial_inplace */
317 0, /* src_mask */
318 0xffffffff, /* dst_mask */
319 FALSE), /* pcrel_offset */
320
321 /* A 32-bit offset from GOT to entry for this symbol in PLT and request
322 to create PLT entry for symbol. */
323 HOWTO (R_CRIS_32_PLT_GOTREL, /* type */
324 0, /* rightshift */
325 2, /* size (0 = byte, 1 = short, 2 = long) */
326 32, /* bitsize */
327 FALSE, /* pc_relative */
328 0, /* bitpos */
329 complain_overflow_bitfield, /* complain_on_overflow */
330 bfd_elf_generic_reloc, /* special_function */
331 "R_CRIS_32_PLT_GOTREL", /* name */
332 FALSE, /* partial_inplace */
333 0, /* src_mask */
334 0xffffffff, /* dst_mask */
335 FALSE), /* pcrel_offset */
336
337 /* A 32-bit offset from PC (location after the relocation) + addend to
338 entry for this symbol in PLT and request to create PLT entry for
339 symbol. */
340 HOWTO (R_CRIS_32_PLT_PCREL, /* type */
341 0, /* rightshift */
342 2, /* size (0 = byte, 1 = short, 2 = long) */
343 32, /* bitsize */
344 TRUE, /* pc_relative */
345 0, /* bitpos */
346 complain_overflow_bitfield, /* complain_on_overflow */
347 cris_elf_pcrel_reloc, /* special_function */
348 "R_CRIS_32_PLT_PCREL", /* name */
349 FALSE, /* partial_inplace */
350 0, /* src_mask */
351 0xffffffff, /* dst_mask */
352 TRUE), /* pcrel_offset */
353
354 /* We don't handle these in any special manner and cross-format
355 linking is not supported; just recognize them enough to pass them
356 around. FIXME: do the same for most PIC relocs and add sanity
357 tests to actually refuse gracefully to handle these and PIC
358 relocs for cross-format linking. */
359 #define TLSHOWTO32(name) \
360 HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \
361 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE)
362 #define TLSHOWTO16X(name, X) \
363 HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \
364 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE)
365 #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned)
366 #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed)
367
368 TLSHOWTO32 (R_CRIS_32_GOT_GD),
369 TLSHOWTO16 (R_CRIS_16_GOT_GD),
370 TLSHOWTO32 (R_CRIS_32_GD),
371 TLSHOWTO32 (R_CRIS_DTP),
372 TLSHOWTO32 (R_CRIS_32_DTPREL),
373 TLSHOWTO16S (R_CRIS_16_DTPREL),
374 TLSHOWTO32 (R_CRIS_32_GOT_TPREL),
375 TLSHOWTO16S (R_CRIS_16_GOT_TPREL),
376 TLSHOWTO32 (R_CRIS_32_TPREL),
377 TLSHOWTO16S (R_CRIS_16_TPREL),
378 TLSHOWTO32 (R_CRIS_DTPMOD),
379 TLSHOWTO32 (R_CRIS_32_IE)
380 };
381 \f
382 /* Map BFD reloc types to CRIS ELF reloc types. */
383
384 struct cris_reloc_map
385 {
386 bfd_reloc_code_real_type bfd_reloc_val;
387 unsigned int cris_reloc_val;
388 };
389
390 static const struct cris_reloc_map cris_reloc_map [] =
391 {
392 { BFD_RELOC_NONE, R_CRIS_NONE },
393 { BFD_RELOC_8, R_CRIS_8 },
394 { BFD_RELOC_16, R_CRIS_16 },
395 { BFD_RELOC_32, R_CRIS_32 },
396 { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL },
397 { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL },
398 { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL },
399 { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT },
400 { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY },
401 { BFD_RELOC_CRIS_COPY, R_CRIS_COPY },
402 { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT },
403 { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT },
404 { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE },
405 { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT },
406 { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT },
407 { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT },
408 { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT },
409 { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL },
410 { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
411 { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL },
412 { BFD_RELOC_CRIS_32_GOT_GD, R_CRIS_32_GOT_GD },
413 { BFD_RELOC_CRIS_16_GOT_GD, R_CRIS_16_GOT_GD },
414 { BFD_RELOC_CRIS_32_GD, R_CRIS_32_GD },
415 { BFD_RELOC_CRIS_DTP, R_CRIS_DTP },
416 { BFD_RELOC_CRIS_32_DTPREL, R_CRIS_32_DTPREL },
417 { BFD_RELOC_CRIS_16_DTPREL, R_CRIS_16_DTPREL },
418 { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL },
419 { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL },
420 { BFD_RELOC_CRIS_32_TPREL, R_CRIS_32_TPREL },
421 { BFD_RELOC_CRIS_16_TPREL, R_CRIS_16_TPREL },
422 { BFD_RELOC_CRIS_DTPMOD, R_CRIS_DTPMOD },
423 { BFD_RELOC_CRIS_32_IE, R_CRIS_32_IE }
424 };
425
426 static reloc_howto_type *
427 cris_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
428 bfd_reloc_code_real_type code)
429 {
430 unsigned int i;
431
432 for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
433 if (cris_reloc_map [i].bfd_reloc_val == code)
434 return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
435
436 return NULL;
437 }
438
439 static reloc_howto_type *
440 cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
441 {
442 unsigned int i;
443
444 for (i = 0;
445 i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
446 i++)
447 if (cris_elf_howto_table[i].name != NULL
448 && strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
449 return &cris_elf_howto_table[i];
450
451 return NULL;
452 }
453
454 /* Set the howto pointer for an CRIS ELF reloc. */
455
456 static void
457 cris_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
458 arelent * cache_ptr,
459 Elf_Internal_Rela * dst)
460 {
461 enum elf_cris_reloc_type r_type;
462
463 r_type = ELF32_R_TYPE (dst->r_info);
464 BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
465 cache_ptr->howto = & cris_elf_howto_table [r_type];
466 }
467
468 bfd_reloc_status_type
469 cris_elf_pcrel_reloc (bfd *abfd ATTRIBUTE_UNUSED,
470 arelent *reloc_entry,
471 asymbol *symbol,
472 void * data ATTRIBUTE_UNUSED,
473 asection *input_section,
474 bfd *output_bfd,
475 char **error_message ATTRIBUTE_UNUSED)
476 {
477 /* By default (using only bfd_elf_generic_reloc when linking to
478 non-ELF formats) PC-relative relocs are relative to the beginning
479 of the reloc. CRIS PC-relative relocs are relative to the position
480 *after* the reloc because that's what pre-CRISv32 PC points to
481 after reading an insn field with that reloc. (For CRISv32, PC is
482 actually relative to the start of the insn, but we keep the old
483 definition.) Still, we use as much generic machinery as we can.
484
485 Only adjust when doing a final link. */
486 if (output_bfd == (bfd *) NULL)
487 reloc_entry->addend -= 1 << reloc_entry->howto->size;
488
489 return
490 bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
491 input_section, output_bfd, error_message);
492 }
493 \f
494 /* Support for core dump NOTE sections.
495 The slightly unintuitive code layout is an attempt to keep at least
496 some similarities with other ports, hoping to simplify general
497 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
498
499 static bfd_boolean
500 cris_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
501 {
502 int offset;
503 size_t size;
504
505 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
506 switch (note->descsz)
507 {
508 default:
509 return FALSE;
510
511 case 202: /* Linux/CRISv32 */
512 /* pr_cursig */
513 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
514
515 /* pr_pid */
516 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
517
518 /* pr_reg */
519 offset = 70;
520 size = 128;
521
522 break;
523 }
524 else
525 switch (note->descsz)
526 {
527 default:
528 return FALSE;
529
530 case 214: /* Linux/CRIS */
531 /* pr_cursig */
532 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
533
534 /* pr_pid */
535 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
536
537 /* pr_reg */
538 offset = 70;
539 size = 140;
540
541 break;
542 }
543
544 /* Make a ".reg/999" section. */
545 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
546 size, note->descpos + offset);
547 }
548
549 static bfd_boolean
550 cris_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
551 {
552 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
553 switch (note->descsz)
554 {
555 default:
556 return FALSE;
557
558 case 124: /* Linux/CRISv32 elf_prpsinfo */
559 elf_tdata (abfd)->core->program
560 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
561 elf_tdata (abfd)->core->command
562 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
563 }
564 else
565 switch (note->descsz)
566 {
567 default:
568 return FALSE;
569
570 case 124: /* Linux/CRIS elf_prpsinfo */
571 elf_tdata (abfd)->core->program
572 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
573 elf_tdata (abfd)->core->command
574 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
575 }
576
577 /* Note that for some reason, a spurious space is tacked
578 onto the end of the args in some (at least one anyway)
579 implementations, so strip it off if it exists. */
580
581 {
582 char *command = elf_tdata (abfd)->core->command;
583 int n = strlen (command);
584
585 if (0 < n && command[n - 1] == ' ')
586 command[n - 1] = '\0';
587 }
588
589 return TRUE;
590 }
591 \f
592 /* The name of the dynamic interpreter. This is put in the .interp
593 section. */
594
595 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
596
597 /* The size in bytes of an entry in the procedure linkage table. */
598
599 #define PLT_ENTRY_SIZE 20
600 #define PLT_ENTRY_SIZE_V32 26
601
602 /* The first entry in an absolute procedure linkage table looks like this. */
603
604 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
605 {
606 0xfc, 0xe1,
607 0x7e, 0x7e, /* push mof. */
608 0x7f, 0x0d, /* (dip [pc+]) */
609 0, 0, 0, 0, /* Replaced with address of .got + 4. */
610 0x30, 0x7a, /* move [...],mof */
611 0x7f, 0x0d, /* (dip [pc+]) */
612 0, 0, 0, 0, /* Replaced with address of .got + 8. */
613 0x30, 0x09 /* jump [...] */
614 };
615
616 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
617 {
618 0x84, 0xe2, /* subq 4,$sp */
619 0x6f, 0xfe, /* move.d 0,$acr */
620 0, 0, 0, 0, /* Replaced by address of .got + 4. */
621 0x7e, 0x7a, /* move $mof,[$sp] */
622 0x3f, 0x7a, /* move [$acr],$mof */
623 0x04, 0xf2, /* addq 4,acr */
624 0x6f, 0xfa, /* move.d [$acr],$acr */
625 0xbf, 0x09, /* jump $acr */
626 0xb0, 0x05, /* nop */
627 0, 0 /* Pad out to 26 bytes. */
628 };
629
630 /* Subsequent entries in an absolute procedure linkage table look like
631 this. */
632
633 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
634 {
635 0x7f, 0x0d, /* (dip [pc+]) */
636 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
637 0x30, 0x09, /* jump [...] */
638 0x3f, 0x7e, /* move [pc+],mof */
639 0, 0, 0, 0, /* Replaced with offset into relocation table. */
640 0x2f, 0xfe, /* add.d [pc+],pc */
641 0xec, 0xff,
642 0xff, 0xff /* Replaced with offset to start of .plt. */
643 };
644
645 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
646 {
647 0x6f, 0xfe, /* move.d 0,$acr */
648 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
649 0x6f, 0xfa, /* move.d [$acr],$acr */
650 0xbf, 0x09, /* jump $acr */
651 0xb0, 0x05, /* nop */
652 0x3f, 0x7e, /* move 0,mof */
653 0, 0, 0, 0, /* Replaced with offset into relocation table. */
654 0xbf, 0x0e, /* ba start_of_plt0_entry */
655 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
656 0xb0, 0x05 /* nop */
657 };
658
659 /* The first entry in a PIC procedure linkage table looks like this. */
660
661 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
662 {
663 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
664 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
665 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
666 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
667 };
668
669 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
670 {
671 0x84, 0xe2, /* subq 4,$sp */
672 0x04, 0x01, /* addoq 4,$r0,$acr */
673 0x7e, 0x7a, /* move $mof,[$sp] */
674 0x3f, 0x7a, /* move [$acr],$mof */
675 0x04, 0xf2, /* addq 4,$acr */
676 0x6f, 0xfa, /* move.d [$acr],$acr */
677 0xbf, 0x09, /* jump $acr */
678 0xb0, 0x05, /* nop */
679 0, 0, /* Pad out to 26 bytes. */
680 0, 0, 0, 0,
681 0, 0, 0, 0
682 };
683
684 /* Subsequent entries in a PIC procedure linkage table look like this. */
685
686 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
687 {
688 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
689 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
690 0x30, 0x09, /* jump [...] */
691 0x3f, 0x7e, /* move [pc+],mof */
692 0, 0, 0, 0, /* Replaced with offset into relocation table. */
693 0x2f, 0xfe, /* add.d [pc+],pc */
694 0xec, 0xff, /* Replaced with offset to start of .plt. */
695 0xff, 0xff
696 };
697
698 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
699 {
700 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
701 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
702 0x6f, 0xfa, /* move.d [$acr],$acr */
703 0xbf, 0x09, /* jump $acr */
704 0xb0, 0x05, /* nop */
705 0x3f, 0x7e, /* move relocoffs,$mof */
706 0, 0, 0, 0, /* Replaced with offset into relocation table. */
707 0xbf, 0x0e, /* ba start_of_plt */
708 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
709 0xb0, 0x05 /* nop */
710 };
711 \f
712 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
713 (and most other PIC/shlib stuff). Check that we don't drift away
714 without reason.
715
716 The CRIS linker, like the m68k and i386 linkers (and probably the rest
717 too) needs to keep track of the number of relocs that it decides to
718 copy in check_relocs for each symbol. This is so that it can discard
719 PC relative relocs if it doesn't need them when linking with
720 -Bsymbolic. We store the information in a field extending the regular
721 ELF linker hash table. */
722
723 /* This structure keeps track of the number of PC relative relocs we have
724 copied for a given symbol. */
725
726 struct elf_cris_pcrel_relocs_copied
727 {
728 /* Next section. */
729 struct elf_cris_pcrel_relocs_copied *next;
730
731 /* A section in dynobj. */
732 asection *section;
733
734 /* Number of relocs copied in this section. */
735 bfd_size_type count;
736
737 /* Example of reloc being copied, for message. */
738 enum elf_cris_reloc_type r_type;
739 };
740
741 /* CRIS ELF linker hash entry. */
742
743 struct elf_cris_link_hash_entry
744 {
745 struct elf_link_hash_entry root;
746
747 /* Number of PC relative relocs copied for this symbol. */
748 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
749
750 /* The GOTPLT references are CRIS-specific; the goal is to avoid having
751 both a general GOT and a PLT-specific GOT entry for the same symbol,
752 when it is referenced both as a function and as a function pointer.
753
754 Number of GOTPLT references for a function. */
755 bfd_signed_vma gotplt_refcount;
756
757 /* Actual GOTPLT index for this symbol, if applicable, or zero if not
758 (zero is never used as an index). FIXME: We should be able to fold
759 this with gotplt_refcount in a union, like the got and plt unions in
760 elf_link_hash_entry. */
761 bfd_size_type gotplt_offset;
762
763 /* The root.got.refcount is the sum of the regular reference counts
764 (this) and those members below. We have to keep a separate count
765 to track when we've found the first (or last) reference to a
766 regular got entry. The offset is in root.got.offset. */
767 bfd_signed_vma reg_got_refcount;
768
769 /* Similar to the above, the number of reloc references to this
770 symbols that need a R_CRIS_32_TPREL slot. The offset is in
771 root.got.offset, because this and .dtp_refcount can't validly
772 happen when there's also a regular GOT entry; that's invalid
773 input for which an error is emitted. */
774 bfd_signed_vma tprel_refcount;
775
776 /* Similar to the above, the number of reloc references to this
777 symbols that need a R_CRIS_DTP slot. The offset is in
778 root.got.offset; plus 4 if .tprel_refcount > 0. */
779 bfd_signed_vma dtp_refcount;
780 };
781
782 static bfd_boolean
783 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *,
784 void * );
785 static bfd_boolean
786 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *,
787 void *);
788
789 /* The local_got_refcounts and local_got_offsets are a multiple of
790 LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
791 refcount for GOT itself, see code), with the summary / group offset
792 for local symbols located at offset N, reference counts for
793 ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
794 relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
795 3*LSNUM. */
796
797 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
798 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
799 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
800 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
801
802 /* CRIS ELF linker hash table. */
803
804 struct elf_cris_link_hash_table
805 {
806 struct elf_link_hash_table root;
807
808 /* We can't use the PLT offset and calculate to get the GOTPLT offset,
809 since we try and avoid creating GOTPLT:s when there's already a GOT.
810 Instead, we keep and update the next available index here. */
811 bfd_size_type next_gotplt_entry;
812
813 /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
814 been seen for any input; if != 0, then the constant-offset
815 R_CRIS_DTPMOD is needed for this DSO/executable. This turns
816 negative at relocation, so that we don't need an extra flag for
817 when the reloc is output. */
818 bfd_signed_vma dtpmod_refcount;
819 };
820
821 /* Traverse a CRIS ELF linker hash table. */
822
823 #define elf_cris_link_hash_traverse(table, func, info) \
824 (elf_link_hash_traverse \
825 (&(table)->root, \
826 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
827 (info)))
828
829 /* Get the CRIS ELF linker hash table from a link_info structure. */
830
831 #define elf_cris_hash_table(p) \
832 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
833 == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL)
834
835 /* Get the CRIS ELF linker hash entry from a regular hash entry (the
836 "parent class"). The .root reference is just a simple type
837 check on the argument. */
838
839 #define elf_cris_hash_entry(p) \
840 ((struct elf_cris_link_hash_entry *) (&(p)->root))
841
842 /* Create an entry in a CRIS ELF linker hash table. */
843
844 static struct bfd_hash_entry *
845 elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry,
846 struct bfd_hash_table *table,
847 const char *string)
848 {
849 struct elf_cris_link_hash_entry *ret =
850 (struct elf_cris_link_hash_entry *) entry;
851
852 /* Allocate the structure if it has not already been allocated by a
853 subclass. */
854 if (ret == (struct elf_cris_link_hash_entry *) NULL)
855 ret = ((struct elf_cris_link_hash_entry *)
856 bfd_hash_allocate (table,
857 sizeof (struct elf_cris_link_hash_entry)));
858 if (ret == (struct elf_cris_link_hash_entry *) NULL)
859 return (struct bfd_hash_entry *) ret;
860
861 /* Call the allocation method of the superclass. */
862 ret = ((struct elf_cris_link_hash_entry *)
863 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
864 table, string));
865 if (ret != (struct elf_cris_link_hash_entry *) NULL)
866 {
867 ret->pcrel_relocs_copied = NULL;
868 ret->gotplt_refcount = 0;
869 ret->gotplt_offset = 0;
870 ret->dtp_refcount = 0;
871 ret->tprel_refcount = 0;
872 ret->reg_got_refcount = 0;
873 }
874
875 return (struct bfd_hash_entry *) ret;
876 }
877
878 /* Create a CRIS ELF linker hash table. */
879
880 static struct bfd_link_hash_table *
881 elf_cris_link_hash_table_create (bfd *abfd)
882 {
883 struct elf_cris_link_hash_table *ret;
884 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
885
886 ret = ((struct elf_cris_link_hash_table *) bfd_zmalloc (amt));
887 if (ret == (struct elf_cris_link_hash_table *) NULL)
888 return NULL;
889
890 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
891 elf_cris_link_hash_newfunc,
892 sizeof (struct elf_cris_link_hash_entry),
893 CRIS_ELF_DATA))
894 {
895 free (ret);
896 return NULL;
897 }
898
899 /* Initialize to skip over the first three entries in the gotplt; they
900 are used for run-time symbol evaluation. */
901 ret->next_gotplt_entry = 12;
902
903 return &ret->root.root;
904 }
905 \f
906 /* Perform a single relocation. By default we use the standard BFD
907 routines, with a few tweaks. */
908
909 static bfd_reloc_status_type
910 cris_final_link_relocate (reloc_howto_type * howto,
911 bfd * input_bfd,
912 asection * input_section,
913 bfd_byte * contents,
914 Elf_Internal_Rela * rel,
915 bfd_vma relocation)
916 {
917 bfd_reloc_status_type r;
918 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
919
920 /* PC-relative relocations are relative to the position *after*
921 the reloc. Note that for R_CRIS_8_PCREL the adjustment is
922 not a single byte, since PC must be 16-bit-aligned. */
923 switch (r_type)
924 {
925 /* Check that the 16-bit GOT relocs are positive. */
926 case R_CRIS_16_GOTPLT:
927 case R_CRIS_16_GOT:
928 if ((bfd_signed_vma) relocation < 0)
929 return bfd_reloc_overflow;
930 break;
931
932 case R_CRIS_32_PLT_PCREL:
933 case R_CRIS_32_PCREL:
934 relocation -= 2;
935 /* Fall through. */
936 case R_CRIS_8_PCREL:
937 case R_CRIS_16_PCREL:
938 relocation -= 2;
939 break;
940
941 default:
942 break;
943 }
944
945 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
946 contents, rel->r_offset,
947 relocation, rel->r_addend);
948 return r;
949 }
950 \f
951
952 /* The number of errors left before we stop outputting reloc-specific
953 explanatory messages. By coincidence, this works nicely together
954 with the default number of messages you'll get from LD about
955 "relocation truncated to fit" messages before you get an
956 "additional relocation overflows omitted from the output". */
957 static int additional_relocation_error_msg_count = 10;
958
959 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
960 copied, for further comments. */
961
962 static bfd_boolean
963 cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
964 struct bfd_link_info *info,
965 bfd *input_bfd,
966 asection *input_section,
967 bfd_byte *contents,
968 Elf_Internal_Rela *relocs,
969 Elf_Internal_Sym *local_syms,
970 asection **local_sections)
971 {
972 struct elf_cris_link_hash_table * htab;
973 bfd *dynobj;
974 Elf_Internal_Shdr *symtab_hdr;
975 struct elf_link_hash_entry **sym_hashes;
976 bfd_vma *local_got_offsets;
977 asection *sgot;
978 asection *splt;
979 asection *sreloc;
980 Elf_Internal_Rela *rel;
981 Elf_Internal_Rela *relend;
982 asection *srelgot;
983
984 htab = elf_cris_hash_table (info);
985 if (htab == NULL)
986 return FALSE;
987
988 dynobj = elf_hash_table (info)->dynobj;
989 local_got_offsets = elf_local_got_offsets (input_bfd);
990 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
991 sym_hashes = elf_sym_hashes (input_bfd);
992 relend = relocs + input_section->reloc_count;
993
994 sgot = NULL;
995 splt = NULL;
996 sreloc = NULL;
997 srelgot = NULL;
998
999 if (dynobj != NULL)
1000 {
1001 splt = bfd_get_linker_section (dynobj, ".plt");
1002 sgot = bfd_get_linker_section (dynobj, ".got");
1003 }
1004
1005 for (rel = relocs; rel < relend; rel ++)
1006 {
1007 reloc_howto_type *howto;
1008 unsigned long r_symndx;
1009 Elf_Internal_Sym *sym;
1010 asection *sec;
1011 struct elf_link_hash_entry *h;
1012 bfd_vma relocation;
1013 bfd_reloc_status_type r;
1014 const char *symname = NULL;
1015 enum elf_cris_reloc_type r_type;
1016
1017 r_type = ELF32_R_TYPE (rel->r_info);
1018
1019 if ( r_type == R_CRIS_GNU_VTINHERIT
1020 || r_type == R_CRIS_GNU_VTENTRY)
1021 continue;
1022
1023 r_symndx = ELF32_R_SYM (rel->r_info);
1024 howto = cris_elf_howto_table + r_type;
1025 h = NULL;
1026 sym = NULL;
1027 sec = NULL;
1028
1029 if (r_symndx < symtab_hdr->sh_info)
1030 {
1031 sym = local_syms + r_symndx;
1032 sec = local_sections [r_symndx];
1033 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1034
1035 symname = (bfd_elf_string_from_elf_section
1036 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1037 if (symname == NULL)
1038 symname = bfd_section_name (input_bfd, sec);
1039 }
1040 else
1041 {
1042 bfd_boolean warned, ignored;
1043 bfd_boolean unresolved_reloc;
1044
1045 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1046 r_symndx, symtab_hdr, sym_hashes,
1047 h, sec, relocation,
1048 unresolved_reloc, warned, ignored);
1049
1050 symname = h->root.root.string;
1051
1052 if (unresolved_reloc
1053 /* Perhaps we should detect the cases that
1054 sec->output_section is expected to be NULL like i386 and
1055 m68k, but apparently (and according to elfxx-ia64.c) all
1056 valid cases are where the symbol is defined in a shared
1057 object which we link dynamically against. This includes
1058 PLT relocs for which we've created a PLT entry and other
1059 relocs for which we're prepared to create dynamic
1060 relocations.
1061
1062 For now, new situations cause us to just err when
1063 sec->output_offset is NULL but the object with the symbol
1064 is *not* dynamically linked against. Thus this will
1065 automatically remind us so we can see if there are other
1066 valid cases we need to revisit. */
1067 && (sec->owner->flags & DYNAMIC) != 0)
1068 relocation = 0;
1069
1070 else if (h->root.type == bfd_link_hash_defined
1071 || h->root.type == bfd_link_hash_defweak)
1072 {
1073 /* Here follow the cases where the relocation value must
1074 be zero (or when further handling is simplified when
1075 zero). I can't claim to understand the various
1076 conditions and they weren't described in the files
1077 where I copied them from (elf32-m68k.c and
1078 elf32-i386.c), but let's mention examples of where
1079 they happen. FIXME: Perhaps define and use a
1080 dynamic_symbol_p function like ia64.
1081
1082 - When creating a shared library, we can have an
1083 ordinary relocation for a symbol defined in a shared
1084 library (perhaps the one we create). We then make
1085 the relocation value zero, as the value seen now will
1086 be added into the relocation addend in this shared
1087 library, but must be handled only at dynamic-link
1088 time. FIXME: Not sure this example covers the
1089 h->elf_link_hash_flags test, though it's there in
1090 other targets. */
1091 if (info->shared
1092 && ((! info->symbolic && h->dynindx != -1)
1093 || !h->def_regular)
1094 && (input_section->flags & SEC_ALLOC) != 0
1095 && (r_type == R_CRIS_8
1096 || r_type == R_CRIS_16
1097 || r_type == R_CRIS_32
1098 || r_type == R_CRIS_8_PCREL
1099 || r_type == R_CRIS_16_PCREL
1100 || r_type == R_CRIS_32_PCREL))
1101 relocation = 0;
1102 else if (!info->relocatable && unresolved_reloc
1103 && (_bfd_elf_section_offset (output_bfd, info,
1104 input_section,
1105 rel->r_offset)
1106 != (bfd_vma) -1))
1107 {
1108 _bfd_error_handler
1109 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1110 input_bfd,
1111 input_section,
1112 cris_elf_howto_table[r_type].name,
1113 symname);
1114 bfd_set_error (bfd_error_bad_value);
1115 return FALSE;
1116 }
1117 }
1118 }
1119
1120 if (sec != NULL && discarded_section (sec))
1121 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1122 rel, 1, relend, howto, 0, contents);
1123
1124 if (info->relocatable)
1125 continue;
1126
1127 switch (r_type)
1128 {
1129 case R_CRIS_16_GOTPLT:
1130 case R_CRIS_32_GOTPLT:
1131 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1132 but we require a PLT, and the PLT handling will take care of
1133 filling in the PLT-specific GOT entry. For the GOT offset,
1134 calculate it as we do when filling it in for the .got.plt
1135 section. If we don't have a PLT, punt to GOT handling. */
1136 if (h != NULL
1137 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1138 {
1139 asection *sgotplt
1140 = bfd_get_linker_section (dynobj, ".got.plt");
1141 bfd_vma got_offset;
1142
1143 BFD_ASSERT (h->dynindx != -1);
1144 BFD_ASSERT (sgotplt != NULL);
1145
1146 got_offset
1147 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1148
1149 relocation = got_offset;
1150 break;
1151 }
1152
1153 /* We didn't make a PLT entry for this symbol. Maybe everything is
1154 folded into the GOT. Other than folding, this happens when
1155 statically linking PIC code, or when using -Bsymbolic. Check
1156 that we instead have a GOT entry as done for us by
1157 elf_cris_adjust_dynamic_symbol, and drop through into the
1158 ordinary GOT cases. This must not happen for the
1159 executable, because any reference it does to a function
1160 that is satisfied by a DSO must generate a PLT. We assume
1161 these call-specific relocs don't address non-functions. */
1162 if (h != NULL
1163 && (h->got.offset == (bfd_vma) -1
1164 || (!info->shared
1165 && !(h->def_regular
1166 || (!h->def_dynamic
1167 && h->root.type == bfd_link_hash_undefweak)))))
1168 {
1169 (*_bfd_error_handler)
1170 ((h->got.offset == (bfd_vma) -1)
1171 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1172 " against symbol `%s'")
1173 : _("%B, section %A: No PLT for relocation %s"
1174 " against symbol `%s'"),
1175 input_bfd,
1176 input_section,
1177 cris_elf_howto_table[r_type].name,
1178 (symname != NULL && symname[0] != '\0'
1179 ? symname : _("[whose name is lost]")));
1180
1181 /* FIXME: Perhaps blaming input is not the right thing to
1182 do; this is probably an internal error. But it is true
1183 that we didn't like that particular input. */
1184 bfd_set_error (bfd_error_bad_value);
1185 return FALSE;
1186 }
1187 /* Fall through. */
1188
1189 /* The size of the actual relocation is not used here; we only
1190 fill in the GOT table here. */
1191 case R_CRIS_16_GOT:
1192 case R_CRIS_32_GOT:
1193 {
1194 bfd_vma off;
1195
1196 /* Note that despite using RELA relocations, the .got contents
1197 is always filled in with the link-relative relocation
1198 value; the addend. */
1199
1200 if (h != NULL)
1201 {
1202 off = h->got.offset;
1203 BFD_ASSERT (off != (bfd_vma) -1);
1204
1205 if (!elf_hash_table (info)->dynamic_sections_created
1206 || (! info->shared
1207 && (h->def_regular
1208 || h->type == STT_FUNC
1209 || h->needs_plt))
1210 || (info->shared
1211 && (info->symbolic || h->dynindx == -1)
1212 && h->def_regular))
1213 {
1214 /* This wasn't checked above for ! info->shared, but
1215 must hold there if we get here; the symbol must
1216 be defined in the regular program or be undefweak
1217 or be a function or otherwise need a PLT. */
1218 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1219 || info->shared
1220 || h->def_regular
1221 || h->type == STT_FUNC
1222 || h->needs_plt
1223 || h->root.type == bfd_link_hash_undefweak);
1224
1225 /* This is actually a static link, or it is a
1226 -Bsymbolic link and the symbol is defined locally,
1227 or is undefweak, or the symbol was forced to be
1228 local because of a version file, or we're not
1229 creating a dynamic object. We must initialize this
1230 entry in the global offset table. Since the offset
1231 must always be a multiple of 4, we use the least
1232 significant bit to record whether we have
1233 initialized it already.
1234
1235 If this GOT entry should be runtime-initialized, we
1236 will create a .rela.got relocation entry to
1237 initialize the value. This is done in the
1238 finish_dynamic_symbol routine. */
1239 if ((off & 1) != 0)
1240 off &= ~1;
1241 else
1242 {
1243 bfd_put_32 (output_bfd, relocation,
1244 sgot->contents + off);
1245 h->got.offset |= 1;
1246 }
1247 }
1248 }
1249 else
1250 {
1251 BFD_ASSERT (local_got_offsets != NULL
1252 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1253
1254 off = local_got_offsets[r_symndx];
1255
1256 /* The offset must always be a multiple of 4. We use
1257 the least significant bit to record whether we have
1258 already generated the necessary reloc. */
1259 if ((off & 1) != 0)
1260 off &= ~1;
1261 else
1262 {
1263 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1264
1265 if (info->shared)
1266 {
1267 Elf_Internal_Rela outrel;
1268 bfd_byte *loc;
1269
1270 if (srelgot == NULL)
1271 srelgot
1272 = bfd_get_linker_section (dynobj, ".rela.got");
1273 BFD_ASSERT (srelgot != NULL);
1274
1275 outrel.r_offset = (sgot->output_section->vma
1276 + sgot->output_offset
1277 + off);
1278 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1279 outrel.r_addend = relocation;
1280 loc = srelgot->contents;
1281 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1282 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1283 }
1284
1285 local_got_offsets[r_symndx] |= 1;
1286 }
1287 }
1288
1289 relocation = sgot->output_offset + off;
1290 if (rel->r_addend != 0)
1291 {
1292 /* We can't do anything for a relocation which is against
1293 a symbol *plus offset*. GOT holds relocations for
1294 symbols. Make this an error; the compiler isn't
1295 allowed to pass us these kinds of things. */
1296 if (h == NULL)
1297 (*_bfd_error_handler)
1298 (_("%B, section %A: relocation %s with non-zero addend %d"
1299 " against local symbol"),
1300 input_bfd,
1301 input_section,
1302 cris_elf_howto_table[r_type].name,
1303 rel->r_addend);
1304 else
1305 (*_bfd_error_handler)
1306 (_("%B, section %A: relocation %s with non-zero addend %d"
1307 " against symbol `%s'"),
1308 input_bfd,
1309 input_section,
1310 cris_elf_howto_table[r_type].name,
1311 rel->r_addend,
1312 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1313
1314 bfd_set_error (bfd_error_bad_value);
1315 return FALSE;
1316 }
1317 }
1318 break;
1319
1320 case R_CRIS_32_GOTREL:
1321 /* This relocation must only be performed against local symbols.
1322 It's also ok when we link a program and the symbol is either
1323 defined in an ordinary (non-DSO) object or is undefined weak. */
1324 if (h != NULL
1325 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1326 && !(!info->shared
1327 && (h->def_regular
1328 || (!h->def_dynamic
1329 && h->root.type == bfd_link_hash_undefweak))))
1330 {
1331 (*_bfd_error_handler)
1332 (_("%B, section %A: relocation %s is"
1333 " not allowed for global symbol: `%s'"),
1334 input_bfd,
1335 input_section,
1336 cris_elf_howto_table[r_type].name,
1337 symname);
1338 bfd_set_error (bfd_error_bad_value);
1339 return FALSE;
1340 }
1341
1342 /* This can happen if we get a link error with the input ELF
1343 variant mismatching the output variant. Emit an error so
1344 it's noticed if it happens elsewhere. */
1345 if (sgot == NULL)
1346 {
1347 (*_bfd_error_handler)
1348 (_("%B, section %A: relocation %s with no GOT created"),
1349 input_bfd,
1350 input_section,
1351 cris_elf_howto_table[r_type].name);
1352 bfd_set_error (bfd_error_bad_value);
1353 return FALSE;
1354 }
1355
1356 /* This relocation is like a PC-relative one, except the
1357 reference point is the location of GOT. Note that
1358 sgot->output_offset is not involved in this calculation. We
1359 always want the start of entire .got section, not the
1360 position after the reserved header. */
1361 relocation -= sgot->output_section->vma;
1362 break;
1363
1364 case R_CRIS_32_PLT_PCREL:
1365 /* Relocation is to the entry for this symbol in the
1366 procedure linkage table. */
1367
1368 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1369 without using the procedure linkage table. */
1370 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1371 break;
1372
1373 if (h->plt.offset == (bfd_vma) -1
1374 || splt == NULL)
1375 {
1376 /* We didn't make a PLT entry for this symbol. This
1377 happens when statically linking PIC code, or when
1378 using -Bsymbolic. */
1379 break;
1380 }
1381
1382 relocation = (splt->output_section->vma
1383 + splt->output_offset
1384 + h->plt.offset);
1385 break;
1386
1387 case R_CRIS_32_PLT_GOTREL:
1388 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1389 start of the .got section. See also comment at
1390 R_CRIS_32_GOT. */
1391 relocation -= sgot->output_section->vma;
1392
1393 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1394 without using the procedure linkage table. */
1395 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1396 break;
1397
1398 if (h->plt.offset == (bfd_vma) -1
1399 || splt == NULL)
1400 {
1401 /* We didn't make a PLT entry for this symbol. This
1402 happens when statically linking PIC code, or when
1403 using -Bsymbolic. */
1404 break;
1405 }
1406
1407 relocation = (splt->output_section->vma
1408 + splt->output_offset
1409 + h->plt.offset
1410 - sgot->output_section->vma);
1411 break;
1412
1413 case R_CRIS_8_PCREL:
1414 case R_CRIS_16_PCREL:
1415 case R_CRIS_32_PCREL:
1416 /* If the symbol was local, we need no shlib-specific handling. */
1417 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1418 || h->dynindx == -1)
1419 break;
1420
1421 /* Fall through. */
1422 case R_CRIS_8:
1423 case R_CRIS_16:
1424 case R_CRIS_32:
1425 if (info->shared
1426 && r_symndx != STN_UNDEF
1427 && (input_section->flags & SEC_ALLOC) != 0
1428 && ((r_type != R_CRIS_8_PCREL
1429 && r_type != R_CRIS_16_PCREL
1430 && r_type != R_CRIS_32_PCREL)
1431 || (!info->symbolic
1432 || (h != NULL && !h->def_regular))))
1433 {
1434 Elf_Internal_Rela outrel;
1435 bfd_byte *loc;
1436 bfd_boolean skip, relocate;
1437
1438 /* When generating a shared object, these relocations
1439 are copied into the output file to be resolved at run
1440 time. */
1441
1442 if (sreloc == NULL)
1443 {
1444 sreloc = _bfd_elf_get_dynamic_reloc_section
1445 (dynobj, input_section, /*rela?*/ TRUE);
1446 /* The section should have been created in cris_elf_check_relocs,
1447 but that function will not be called for objects which fail in
1448 cris_elf_merge_private_bfd_data. */
1449 if (sreloc == NULL)
1450 {
1451 bfd_set_error (bfd_error_bad_value);
1452 return FALSE;
1453 }
1454 }
1455
1456 skip = FALSE;
1457 relocate = FALSE;
1458
1459 outrel.r_offset =
1460 _bfd_elf_section_offset (output_bfd, info, input_section,
1461 rel->r_offset);
1462 if (outrel.r_offset == (bfd_vma) -1)
1463 skip = TRUE;
1464 else if (outrel.r_offset == (bfd_vma) -2
1465 /* For now, undefined weak symbols with non-default
1466 visibility (yielding 0), like exception info for
1467 discarded sections, will get a R_CRIS_NONE
1468 relocation rather than no relocation, because we
1469 notice too late that the symbol doesn't need a
1470 relocation. */
1471 || (h != NULL
1472 && h->root.type == bfd_link_hash_undefweak
1473 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1474 skip = TRUE, relocate = TRUE;
1475 outrel.r_offset += (input_section->output_section->vma
1476 + input_section->output_offset);
1477
1478 if (skip)
1479 memset (&outrel, 0, sizeof outrel);
1480 /* h->dynindx may be -1 if the symbol was marked to
1481 become local. */
1482 else if (h != NULL
1483 && ((! info->symbolic && h->dynindx != -1)
1484 || !h->def_regular))
1485 {
1486 BFD_ASSERT (h->dynindx != -1);
1487 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1488 outrel.r_addend = relocation + rel->r_addend;
1489 }
1490 else
1491 {
1492 outrel.r_addend = relocation + rel->r_addend;
1493
1494 if (r_type == R_CRIS_32)
1495 {
1496 relocate = TRUE;
1497 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1498 }
1499 else
1500 {
1501 long indx;
1502
1503 if (bfd_is_abs_section (sec))
1504 indx = 0;
1505 else if (sec == NULL || sec->owner == NULL)
1506 {
1507 bfd_set_error (bfd_error_bad_value);
1508 return FALSE;
1509 }
1510 else
1511 {
1512 asection *osec;
1513
1514 /* We are turning this relocation into one
1515 against a section symbol. It would be
1516 proper to subtract the symbol's value,
1517 osec->vma, from the emitted reloc addend,
1518 but ld.so expects buggy relocs. */
1519 osec = sec->output_section;
1520 indx = elf_section_data (osec)->dynindx;
1521 if (indx == 0)
1522 {
1523 osec = htab->root.text_index_section;
1524 indx = elf_section_data (osec)->dynindx;
1525 }
1526 BFD_ASSERT (indx != 0);
1527 }
1528
1529 outrel.r_info = ELF32_R_INFO (indx, r_type);
1530 }
1531 }
1532
1533 loc = sreloc->contents;
1534 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1535 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1536
1537 /* This reloc will be computed at runtime, so there's no
1538 need to do anything now, except for R_CRIS_32 relocations
1539 that have been turned into R_CRIS_RELATIVE. */
1540 if (!relocate)
1541 continue;
1542 }
1543
1544 break;
1545
1546 case R_CRIS_16_DTPREL:
1547 case R_CRIS_32_DTPREL:
1548 /* This relocation must only be performed against local
1549 symbols, or to sections that are not loadable. It's also
1550 ok when we link a program and the symbol is defined in an
1551 ordinary (non-DSO) object (if it's undefined there, we've
1552 already seen an error). */
1553 if (h != NULL
1554 && (input_section->flags & SEC_ALLOC) != 0
1555 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1556 && (info->shared
1557 || (!h->def_regular
1558 && h->root.type != bfd_link_hash_undefined)))
1559 {
1560 (*_bfd_error_handler)
1561 ((h->root.type == bfd_link_hash_undefined)
1562 /* We shouldn't get here for GCC-emitted code. */
1563 ? _("%B, section %A: relocation %s has an undefined"
1564 " reference to `%s', perhaps a declaration mixup?")
1565 : ("%B, section %A: relocation %s is"
1566 " not allowed for `%s', a global symbol with default"
1567 " visibility, perhaps a declaration mixup?"),
1568 input_bfd,
1569 input_section,
1570 cris_elf_howto_table[r_type].name,
1571 symname != NULL && symname[0] != '\0'
1572 ? symname : _("[whose name is lost]"));
1573 bfd_set_error (bfd_error_bad_value);
1574 return FALSE;
1575 }
1576
1577 BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1578 || htab->dtpmod_refcount != 0);
1579
1580 /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1581 already done so. Note that we do this in .got.plt, not
1582 in .got, as .got.plt contains the first part, still the
1583 reloc is against .got, because the linker script directs
1584 (is required to direct) them both into .got. */
1585 if (htab->dtpmod_refcount > 0
1586 && (input_section->flags & SEC_ALLOC) != 0)
1587 {
1588 asection *sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1589 BFD_ASSERT (sgotplt != NULL);
1590
1591 if (info->shared)
1592 {
1593 Elf_Internal_Rela outrel;
1594 bfd_byte *loc;
1595
1596 if (srelgot == NULL)
1597 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1598 BFD_ASSERT (srelgot != NULL);
1599 loc = srelgot->contents;
1600 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1601
1602 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1603 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1604 outrel.r_offset = (sgotplt->output_section->vma
1605 + sgotplt->output_offset
1606 + 12);
1607 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1608 outrel.r_addend = 0;
1609 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1610 }
1611 else
1612 {
1613 /* For an executable, the GOT entry contents is known. */
1614 bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1615 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1616 }
1617
1618 /* Reverse the sign to mark that we've emitted the
1619 required GOT entry. */
1620 htab->dtpmod_refcount = - htab->dtpmod_refcount;
1621 }
1622
1623 /* The relocation is the offset from the start of the module
1624 TLS block to the (local) symbol. */
1625 relocation -= elf_hash_table (info)->tls_sec == NULL
1626 ? 0 : elf_hash_table (info)->tls_sec->vma;
1627 break;
1628
1629 case R_CRIS_32_GD:
1630 if (info->shared)
1631 {
1632 bfd_set_error (bfd_error_invalid_operation);
1633
1634 /* We've already informed in cris_elf_check_relocs that
1635 this is an error. */
1636 return FALSE;
1637 }
1638 /* Fall through. */
1639
1640 case R_CRIS_16_GOT_GD:
1641 case R_CRIS_32_GOT_GD:
1642 if (rel->r_addend != 0)
1643 {
1644 /* We can't do anything for a relocation which is against a
1645 symbol *plus offset*. The GOT holds relocations for
1646 symbols. Make this an error; the compiler isn't allowed
1647 to pass us these kinds of things. */
1648 (*_bfd_error_handler)
1649 (_("%B, section %A: relocation %s with non-zero addend %d"
1650 " against symbol `%s'"),
1651 input_bfd,
1652 input_section,
1653 cris_elf_howto_table[r_type].name,
1654 rel->r_addend,
1655 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1656
1657 bfd_set_error (bfd_error_bad_value);
1658 return FALSE;
1659 }
1660
1661 if (!info->shared
1662 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1663 {
1664 /* Known contents of the GOT. */
1665 bfd_vma off;
1666
1667 /* The symbol is defined in the program, so just write
1668 (1, known_tpoffset) into the GOT. */
1669 relocation -= elf_hash_table (info)->tls_sec->vma;
1670
1671 if (h != NULL)
1672 {
1673 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1674 ? h->got.offset + 4 : h->got.offset;
1675 }
1676 else
1677 {
1678 off = local_got_offsets[r_symndx];
1679 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1680 off += 4;
1681 }
1682
1683 /* We use bit 1 of the offset as a flag for GOT entry with
1684 the R_CRIS_DTP reloc, setting it when we've emitted the
1685 GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL
1686 relocs. */
1687 if ((off & 2) == 0)
1688 {
1689 off &= ~3;
1690
1691 if (h != NULL)
1692 h->got.offset |= 2;
1693 else
1694 local_got_offsets[r_symndx] |= 2;
1695
1696 bfd_put_32 (output_bfd, 1, sgot->contents + off);
1697 bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1698 }
1699 else
1700 off &= ~3;
1701
1702 relocation = sgot->output_offset + off
1703 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1704 }
1705 else
1706 {
1707 /* Not all parts of the GOT entry are known; emit a real
1708 relocation. */
1709 bfd_vma off;
1710
1711 if (h != NULL)
1712 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1713 ? h->got.offset + 4 : h->got.offset;
1714 else
1715 {
1716 off = local_got_offsets[r_symndx];
1717 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1718 off += 4;
1719 }
1720
1721 /* See above re bit 1 and bit 0 usage. */
1722 if ((off & 2) == 0)
1723 {
1724 Elf_Internal_Rela outrel;
1725 bfd_byte *loc;
1726
1727 off &= ~3;
1728
1729 if (h != NULL)
1730 h->got.offset |= 2;
1731 else
1732 local_got_offsets[r_symndx] |= 2;
1733
1734 /* Clear the target contents of the GOT (just as a
1735 gesture; it's already cleared on allocation): this
1736 relocation is not like the other dynrelocs. */
1737 bfd_put_32 (output_bfd, 0, sgot->contents + off);
1738 bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1739
1740 if (srelgot == NULL)
1741 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1742 BFD_ASSERT (srelgot != NULL);
1743
1744 if (h != NULL && h->dynindx != -1)
1745 {
1746 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1747 relocation = 0;
1748 }
1749 else
1750 {
1751 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1752
1753 /* NULL if we had an error. */
1754 relocation -= elf_hash_table (info)->tls_sec == NULL
1755 ? 0 : elf_hash_table (info)->tls_sec->vma;
1756 }
1757
1758 outrel.r_offset = (sgot->output_section->vma
1759 + sgot->output_offset
1760 + off);
1761 outrel.r_addend = relocation;
1762 loc = srelgot->contents;
1763 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1764
1765 /* NULL if we had an error. */
1766 if (srelgot->contents != NULL)
1767 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1768 }
1769 else
1770 off &= ~3;
1771
1772 relocation = sgot->output_offset + off
1773 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1774 }
1775
1776 /* The GOT-relative offset to the GOT entry is the
1777 relocation, or for R_CRIS_32_GD, the actual address of
1778 the GOT entry. */
1779 break;
1780
1781 case R_CRIS_32_IE:
1782 if (info->shared)
1783 {
1784 bfd_set_error (bfd_error_invalid_operation);
1785
1786 /* We've already informed in cris_elf_check_relocs that
1787 this is an error. */
1788 return FALSE;
1789 }
1790 /* Fall through. */
1791
1792 case R_CRIS_32_GOT_TPREL:
1793 case R_CRIS_16_GOT_TPREL:
1794 if (rel->r_addend != 0)
1795 {
1796 /* We can't do anything for a relocation which is
1797 against a symbol *plus offset*. GOT holds
1798 relocations for symbols. Make this an error; the
1799 compiler isn't allowed to pass us these kinds of
1800 things. */
1801 (*_bfd_error_handler)
1802 (_("%B, section %A: relocation %s with non-zero addend %d"
1803 " against symbol `%s'"),
1804 input_bfd,
1805 input_section,
1806 cris_elf_howto_table[r_type].name,
1807 rel->r_addend,
1808 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1809 bfd_set_error (bfd_error_bad_value);
1810 return FALSE;
1811 }
1812
1813 if (!info->shared
1814 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1815 {
1816 /* Known contents of the GOT. */
1817 bfd_vma off;
1818
1819 /* The symbol is defined in the program, so just write
1820 the -prog_tls_size+known_tpoffset into the GOT. */
1821 relocation -= elf_hash_table (info)->tls_sec->vma;
1822 relocation -= elf_hash_table (info)->tls_size;
1823
1824 if (h != NULL)
1825 off = h->got.offset;
1826 else
1827 off = local_got_offsets[r_symndx];
1828
1829 /* Bit 0 is used to mark whether we've emitted the required
1830 entry (and if needed R_CRIS_32_TPREL reloc). Bit 1
1831 is used similarly for R_CRIS_DTP, see above. */
1832 if ((off & 1) == 0)
1833 {
1834 off &= ~3;
1835
1836 if (h != NULL)
1837 h->got.offset |= 1;
1838 else
1839 local_got_offsets[r_symndx] |= 1;
1840
1841 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1842 }
1843 else
1844 off &= ~3;
1845
1846 relocation = sgot->output_offset + off
1847 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1848 }
1849 else
1850 {
1851 /* Emit a real relocation. */
1852 bfd_vma off;
1853
1854 if (h != NULL)
1855 off = h->got.offset;
1856 else
1857 off = local_got_offsets[r_symndx];
1858
1859 /* See above re usage of bit 0 and 1. */
1860 if ((off & 1) == 0)
1861 {
1862 Elf_Internal_Rela outrel;
1863 bfd_byte *loc;
1864
1865 off &= ~3;
1866
1867 if (h != NULL)
1868 h->got.offset |= 1;
1869 else
1870 local_got_offsets[r_symndx] |= 1;
1871
1872 if (srelgot == NULL)
1873 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1874 BFD_ASSERT (srelgot != NULL);
1875
1876 if (h != NULL && h->dynindx != -1)
1877 {
1878 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1879 relocation = 0;
1880 }
1881 else
1882 {
1883 outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1884
1885 /* NULL if we had an error. */
1886 relocation -= elf_hash_table (info)->tls_sec == NULL
1887 ? 0 : elf_hash_table (info)->tls_sec->vma;
1888 }
1889
1890 /* Just "define" the initial contents in some
1891 semi-logical way. */
1892 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1893
1894 outrel.r_offset = (sgot->output_section->vma
1895 + sgot->output_offset
1896 + off);
1897 outrel.r_addend = relocation;
1898 loc = srelgot->contents;
1899 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1900 /* NULL if we had an error. */
1901 if (srelgot->contents != NULL)
1902 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1903 }
1904 else
1905 off &= ~3;
1906
1907 relocation = sgot->output_offset + off
1908 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1909 }
1910
1911 /* The GOT-relative offset to the GOT entry is the relocation,
1912 or for R_CRIS_32_GD, the actual address of the GOT entry. */
1913 break;
1914
1915 case R_CRIS_16_TPREL:
1916 case R_CRIS_32_TPREL:
1917 /* This relocation must only be performed against symbols
1918 defined in an ordinary (non-DSO) object. */
1919 if (info->shared)
1920 {
1921 bfd_set_error (bfd_error_invalid_operation);
1922
1923 /* We've already informed in cris_elf_check_relocs that
1924 this is an error. */
1925 return FALSE;
1926 }
1927
1928 if (h != NULL
1929 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1930 && !(h->def_regular || ELF_COMMON_DEF_P (h))
1931 /* If it's undefined, then an error message has already
1932 been emitted. */
1933 && h->root.type != bfd_link_hash_undefined)
1934 {
1935 (*_bfd_error_handler)
1936 (_("%B, section %A: relocation %s is"
1937 " not allowed for symbol: `%s'"
1938 " which is defined outside the program,"
1939 " perhaps a declaration mixup?"),
1940 input_bfd,
1941 input_section,
1942 cris_elf_howto_table[r_type].name,
1943 symname);
1944 bfd_set_error (bfd_error_bad_value);
1945 return FALSE;
1946 }
1947
1948 /* NULL if we had an error. */
1949 relocation -= elf_hash_table (info)->tls_sec == NULL
1950 ? 0
1951 : (elf_hash_table (info)->tls_sec->vma
1952 + elf_hash_table (info)->tls_size);
1953
1954 /* The TLS-relative offset is the relocation. */
1955 break;
1956
1957 default:
1958 BFD_FAIL ();
1959 return FALSE;
1960 }
1961
1962 r = cris_final_link_relocate (howto, input_bfd, input_section,
1963 contents, rel, relocation);
1964
1965 if (r != bfd_reloc_ok)
1966 {
1967 const char * msg = (const char *) NULL;
1968
1969 switch (r)
1970 {
1971 case bfd_reloc_overflow:
1972 r = info->callbacks->reloc_overflow
1973 (info, (h ? &h->root : NULL), symname, howto->name,
1974 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1975 if (additional_relocation_error_msg_count > 0)
1976 {
1977 additional_relocation_error_msg_count--;
1978 switch (r_type)
1979 {
1980 case R_CRIS_16_GOTPLT:
1981 case R_CRIS_16_GOT:
1982
1983 /* Not just TLS is involved here, so we make
1984 generation and message depend on -fPIC/-fpic
1985 only. */
1986 case R_CRIS_16_GOT_TPREL:
1987 case R_CRIS_16_GOT_GD:
1988 (*_bfd_error_handler)
1989 (_("(too many global variables for -fpic:"
1990 " recompile with -fPIC)"));
1991 break;
1992
1993 case R_CRIS_16_TPREL:
1994 case R_CRIS_16_DTPREL:
1995 (*_bfd_error_handler)
1996 (_("(thread-local data too big for -fpic or"
1997 " -msmall-tls: recompile with -fPIC or"
1998 " -mno-small-tls)"));
1999 break;
2000
2001 /* No known cause for overflow for other relocs. */
2002 default:
2003 break;
2004 }
2005 }
2006 break;
2007
2008 case bfd_reloc_undefined:
2009 r = info->callbacks->undefined_symbol
2010 (info, symname, input_bfd, input_section, rel->r_offset,
2011 TRUE);
2012 break;
2013
2014 case bfd_reloc_outofrange:
2015 msg = _("internal error: out of range error");
2016 break;
2017
2018 case bfd_reloc_notsupported:
2019 msg = _("internal error: unsupported relocation error");
2020 break;
2021
2022 case bfd_reloc_dangerous:
2023 msg = _("internal error: dangerous relocation");
2024 break;
2025
2026 default:
2027 msg = _("internal error: unknown error");
2028 break;
2029 }
2030
2031 if (msg)
2032 r = info->callbacks->warning
2033 (info, msg, symname, input_bfd, input_section, rel->r_offset);
2034
2035 if (! r)
2036 return FALSE;
2037 }
2038 }
2039
2040 return TRUE;
2041 }
2042 \f
2043 /* Finish up dynamic symbol handling. We set the contents of various
2044 dynamic sections here. */
2045
2046 static bfd_boolean
2047 elf_cris_finish_dynamic_symbol (bfd *output_bfd,
2048 struct bfd_link_info *info,
2049 struct elf_link_hash_entry *h,
2050 Elf_Internal_Sym *sym)
2051 {
2052 struct elf_cris_link_hash_table * htab;
2053 bfd *dynobj;
2054
2055 /* Where in the plt entry to put values. */
2056 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2057
2058 /* What offset to add to the distance to the first PLT entry for the
2059 value at plt_off3. */
2060 int plt_off3_value_bias = 4;
2061
2062 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2063 for PIC and non-PIC for v32 and pre-v32). */
2064 int plt_stub_offset = 8;
2065 int plt_entry_size = PLT_ENTRY_SIZE;
2066 const bfd_byte *plt_entry = elf_cris_plt_entry;
2067 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2068
2069 htab = elf_cris_hash_table (info);
2070 if (htab == NULL)
2071 return FALSE;
2072
2073 /* Adjust the various PLT entry offsets. */
2074 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2075 {
2076 plt_off2 = 14;
2077 plt_off3 = 20;
2078 plt_off3_value_bias = -2;
2079 plt_stub_offset = 12;
2080 plt_entry_size = PLT_ENTRY_SIZE_V32;
2081 plt_entry = elf_cris_plt_entry_v32;
2082 plt_pic_entry = elf_cris_pic_plt_entry_v32;
2083 }
2084
2085 dynobj = elf_hash_table (info)->dynobj;
2086
2087 if (h->plt.offset != (bfd_vma) -1)
2088 {
2089 asection *splt;
2090 asection *sgotplt;
2091 asection *srela;
2092 bfd_vma got_base;
2093
2094 bfd_vma gotplt_offset
2095 = elf_cris_hash_entry (h)->gotplt_offset;
2096 Elf_Internal_Rela rela;
2097 bfd_byte *loc;
2098 bfd_boolean has_gotplt = gotplt_offset != 0;
2099
2100 /* Get the index in the .rela.plt relocations for the .got.plt
2101 entry that corresponds to this symbol.
2102 We have to count backwards here, and the result is only valid
2103 as an index into .rela.plt. We also have to undo the effect
2104 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2105 .got.plt) for which gotplt_offset is adjusted, because while
2106 that entry goes into .got.plt, its relocation goes into
2107 .rela.got, not .rela.plt. (It's not PLT-specific; not to be
2108 processed as part of the runtime lazy .rela.plt relocation).
2109 FIXME: There be literal constants here... */
2110 bfd_vma rela_plt_index
2111 = (htab->dtpmod_refcount != 0
2112 ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2113
2114 /* Get the offset into the .got table of the entry that corresponds
2115 to this function. Note that we embed knowledge that "incoming"
2116 .got goes after .got.plt in the output without padding (pointer
2117 aligned). However, that knowledge is present in several other
2118 places too. */
2119 bfd_vma got_offset
2120 = (has_gotplt
2121 ? gotplt_offset
2122 : h->got.offset + htab->next_gotplt_entry);
2123
2124 /* This symbol has an entry in the procedure linkage table. Set it
2125 up. */
2126
2127 BFD_ASSERT (h->dynindx != -1);
2128
2129 splt = bfd_get_linker_section (dynobj, ".plt");
2130 sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
2131 srela = bfd_get_linker_section (dynobj, ".rela.plt");
2132 BFD_ASSERT (splt != NULL && sgotplt != NULL
2133 && (! has_gotplt || srela != NULL));
2134
2135 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2136
2137 /* Fill in the entry in the procedure linkage table. */
2138 if (! info->shared)
2139 {
2140 memcpy (splt->contents + h->plt.offset, plt_entry,
2141 plt_entry_size);
2142
2143 /* We need to enter the absolute address of the GOT entry here. */
2144 bfd_put_32 (output_bfd, got_base + got_offset,
2145 splt->contents + h->plt.offset + plt_off1);
2146 }
2147 else
2148 {
2149 memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2150 plt_entry_size);
2151 bfd_put_32 (output_bfd, got_offset,
2152 splt->contents + h->plt.offset + plt_off1);
2153 }
2154
2155 /* Fill in the plt entry and make a relocation, if this is a "real"
2156 PLT entry. */
2157 if (has_gotplt)
2158 {
2159 /* Fill in the offset to the reloc table. */
2160 bfd_put_32 (output_bfd,
2161 rela_plt_index * sizeof (Elf32_External_Rela),
2162 splt->contents + h->plt.offset + plt_off2);
2163
2164 /* Fill in the offset to the first PLT entry, where to "jump". */
2165 bfd_put_32 (output_bfd,
2166 - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2167 splt->contents + h->plt.offset + plt_off3);
2168
2169 /* Fill in the entry in the global offset table with the address of
2170 the relocating stub. */
2171 bfd_put_32 (output_bfd,
2172 (splt->output_section->vma
2173 + splt->output_offset
2174 + h->plt.offset
2175 + plt_stub_offset),
2176 sgotplt->contents + got_offset);
2177
2178 /* Fill in the entry in the .rela.plt section. */
2179 rela.r_offset = (sgotplt->output_section->vma
2180 + sgotplt->output_offset
2181 + got_offset);
2182 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2183 rela.r_addend = 0;
2184 loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2185 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2186 }
2187
2188 if (!h->def_regular)
2189 {
2190 /* Mark the symbol as undefined, rather than as defined in
2191 the .plt section. Leave the value alone. */
2192 sym->st_shndx = SHN_UNDEF;
2193
2194 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
2195 know whether resetting the value is significant; if it really
2196 is, rather than a quirk or bug in the sparc port, then I
2197 believe we'd see this elsewhere. */
2198 /* If the symbol is weak, we do need to clear the value.
2199 Otherwise, the PLT entry would provide a definition for
2200 the symbol even if the symbol wasn't defined anywhere,
2201 and so the symbol would never be NULL. */
2202 if (!h->ref_regular_nonweak)
2203 sym->st_value = 0;
2204 }
2205 }
2206
2207 /* For an ordinary program, we emit .got relocs only for symbols that
2208 are in the dynamic-symbols table and are either defined by the
2209 program or are undefined weak symbols, or are function symbols
2210 where we do not output a PLT: the PLT reloc was output above and all
2211 references to the function symbol are redirected to the PLT. */
2212 if (h->got.offset != (bfd_vma) -1
2213 && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2214 && (info->shared
2215 || (h->dynindx != -1
2216 && h->plt.offset == (bfd_vma) -1
2217 && !h->def_regular
2218 && h->root.type != bfd_link_hash_undefweak)))
2219 {
2220 asection *sgot;
2221 asection *srela;
2222 Elf_Internal_Rela rela;
2223 bfd_byte *loc;
2224 bfd_byte *where;
2225
2226 /* This symbol has an entry in the global offset table. Set it up. */
2227
2228 sgot = bfd_get_linker_section (dynobj, ".got");
2229 srela = bfd_get_linker_section (dynobj, ".rela.got");
2230 BFD_ASSERT (sgot != NULL && srela != NULL);
2231
2232 rela.r_offset = (sgot->output_section->vma
2233 + sgot->output_offset
2234 + (h->got.offset &~ (bfd_vma) 1));
2235
2236 /* If this is a static link, or it is a -Bsymbolic link and the
2237 symbol is defined locally or was forced to be local because
2238 of a version file, we just want to emit a RELATIVE reloc.
2239 The entry in the global offset table will already have been
2240 initialized in the relocate_section function. */
2241 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2242 if (! elf_hash_table (info)->dynamic_sections_created
2243 || (info->shared
2244 && (info->symbolic || h->dynindx == -1)
2245 && h->def_regular))
2246 {
2247 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2248 rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2249 }
2250 else
2251 {
2252 bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2253 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2254 rela.r_addend = 0;
2255 }
2256
2257 loc = srela->contents;
2258 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2259 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2260 }
2261
2262 if (h->needs_copy)
2263 {
2264 asection *s;
2265 Elf_Internal_Rela rela;
2266 bfd_byte *loc;
2267
2268 /* This symbol needs a copy reloc. Set it up. */
2269
2270 BFD_ASSERT (h->dynindx != -1
2271 && (h->root.type == bfd_link_hash_defined
2272 || h->root.type == bfd_link_hash_defweak));
2273
2274 s = bfd_get_linker_section (dynobj, ".rela.bss");
2275 BFD_ASSERT (s != NULL);
2276
2277 rela.r_offset = (h->root.u.def.value
2278 + h->root.u.def.section->output_section->vma
2279 + h->root.u.def.section->output_offset);
2280 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2281 rela.r_addend = 0;
2282 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2283 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2284 }
2285
2286 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2287 if (h == elf_hash_table (info)->hdynamic
2288 || h == elf_hash_table (info)->hgot)
2289 sym->st_shndx = SHN_ABS;
2290
2291 return TRUE;
2292 }
2293 \f
2294 /* Finish up the dynamic sections. Do *not* emit relocs here, as their
2295 offsets were changed, as part of -z combreloc handling, from those we
2296 computed. */
2297
2298 static bfd_boolean
2299 elf_cris_finish_dynamic_sections (bfd *output_bfd,
2300 struct bfd_link_info *info)
2301 {
2302 bfd *dynobj;
2303 asection *sgot;
2304 asection *sdyn;
2305
2306 dynobj = elf_hash_table (info)->dynobj;
2307
2308 sgot = bfd_get_linker_section (dynobj, ".got.plt");
2309 BFD_ASSERT (sgot != NULL);
2310 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2311
2312 if (elf_hash_table (info)->dynamic_sections_created)
2313 {
2314 asection *splt;
2315 Elf32_External_Dyn *dyncon, *dynconend;
2316
2317 splt = bfd_get_linker_section (dynobj, ".plt");
2318 BFD_ASSERT (splt != NULL && sdyn != NULL);
2319
2320 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2321 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2322 for (; dyncon < dynconend; dyncon++)
2323 {
2324 Elf_Internal_Dyn dyn;
2325 asection *s;
2326
2327 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2328
2329 switch (dyn.d_tag)
2330 {
2331 default:
2332 break;
2333
2334 case DT_PLTGOT:
2335 s = bfd_get_section_by_name (output_bfd, ".got");
2336 BFD_ASSERT (s != NULL);
2337 dyn.d_un.d_ptr = s->vma;
2338 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2339 break;
2340
2341 case DT_JMPREL:
2342 /* Yes, we *can* have a .plt and no .plt.rela, for instance
2343 if all symbols are found in the .got (not .got.plt). */
2344 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2345 dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
2346 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2347 break;
2348
2349 case DT_PLTRELSZ:
2350 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2351 if (s == NULL)
2352 dyn.d_un.d_val = 0;
2353 else
2354 dyn.d_un.d_val = s->size;
2355 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2356 break;
2357
2358 case DT_RELASZ:
2359 /* The procedure linkage table relocs (DT_JMPREL) should
2360 not be included in the overall relocs (DT_RELA).
2361 Therefore, we override the DT_RELASZ entry here to
2362 make it not include the JMPREL relocs. Since the
2363 linker script arranges for .rela.plt to follow all
2364 other relocation sections, we don't have to worry
2365 about changing the DT_RELA entry. */
2366 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2367 if (s != NULL)
2368 dyn.d_un.d_val -= s->size;
2369 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2370 break;
2371 }
2372 }
2373
2374 /* Fill in the first entry in the procedure linkage table. */
2375 if (splt->size > 0)
2376 {
2377 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2378 {
2379 if (info->shared)
2380 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2381 PLT_ENTRY_SIZE_V32);
2382 else
2383 {
2384 memcpy (splt->contents, elf_cris_plt0_entry_v32,
2385 PLT_ENTRY_SIZE_V32);
2386 bfd_put_32 (output_bfd,
2387 sgot->output_section->vma
2388 + sgot->output_offset + 4,
2389 splt->contents + 4);
2390
2391 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2392 = PLT_ENTRY_SIZE_V32;
2393 }
2394 }
2395 else
2396 {
2397 if (info->shared)
2398 memcpy (splt->contents, elf_cris_pic_plt0_entry,
2399 PLT_ENTRY_SIZE);
2400 else
2401 {
2402 memcpy (splt->contents, elf_cris_plt0_entry,
2403 PLT_ENTRY_SIZE);
2404 bfd_put_32 (output_bfd,
2405 sgot->output_section->vma
2406 + sgot->output_offset + 4,
2407 splt->contents + 6);
2408 bfd_put_32 (output_bfd,
2409 sgot->output_section->vma
2410 + sgot->output_offset + 8,
2411 splt->contents + 14);
2412
2413 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2414 = PLT_ENTRY_SIZE;
2415 }
2416 }
2417 }
2418 }
2419
2420 /* Fill in the first three entries in the global offset table. */
2421 if (sgot->size > 0)
2422 {
2423 if (sdyn == NULL)
2424 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2425 else
2426 bfd_put_32 (output_bfd,
2427 sdyn->output_section->vma + sdyn->output_offset,
2428 sgot->contents);
2429 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2430 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2431 }
2432
2433 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2434
2435 return TRUE;
2436 }
2437 \f
2438 /* Return the section that should be marked against GC for a given
2439 relocation. */
2440
2441 static asection *
2442 cris_elf_gc_mark_hook (asection *sec,
2443 struct bfd_link_info *info,
2444 Elf_Internal_Rela *rel,
2445 struct elf_link_hash_entry *h,
2446 Elf_Internal_Sym *sym)
2447 {
2448 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2449 if (h != NULL)
2450 switch (r_type)
2451 {
2452 case R_CRIS_GNU_VTINHERIT:
2453 case R_CRIS_GNU_VTENTRY:
2454 return NULL;
2455
2456 default:
2457 break;
2458 }
2459
2460 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2461 }
2462
2463 /* Update the got entry reference counts for the section being removed. */
2464
2465 static bfd_boolean
2466 cris_elf_gc_sweep_hook (bfd *abfd,
2467 struct bfd_link_info *info,
2468 asection *sec,
2469 const Elf_Internal_Rela *relocs)
2470 {
2471 struct elf_cris_link_hash_table * htab;
2472 Elf_Internal_Shdr *symtab_hdr;
2473 struct elf_link_hash_entry **sym_hashes;
2474 bfd_signed_vma *local_got_refcounts;
2475 const Elf_Internal_Rela *rel, *relend;
2476 bfd *dynobj;
2477 asection *sgot;
2478 asection *srelgot;
2479
2480 if (info->relocatable)
2481 return TRUE;
2482
2483 dynobj = elf_hash_table (info)->dynobj;
2484 if (dynobj == NULL)
2485 return TRUE;
2486
2487 htab = elf_cris_hash_table (info);
2488 if (htab == NULL)
2489 return FALSE;
2490
2491 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2492 sym_hashes = elf_sym_hashes (abfd);
2493 local_got_refcounts = elf_local_got_refcounts (abfd);
2494
2495 sgot = bfd_get_linker_section (dynobj, ".got");
2496 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
2497
2498 relend = relocs + sec->reloc_count;
2499 for (rel = relocs; rel < relend; rel++)
2500 {
2501 unsigned long r_symndx;
2502 struct elf_link_hash_entry *h = NULL;
2503 bfd_signed_vma got_element_size = 4;
2504 bfd_signed_vma *specific_refcount = NULL;
2505 enum elf_cris_reloc_type r_type;
2506
2507 r_symndx = ELF32_R_SYM (rel->r_info);
2508 if (r_symndx >= symtab_hdr->sh_info)
2509 {
2510 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2511 while (h->root.type == bfd_link_hash_indirect
2512 || h->root.type == bfd_link_hash_warning)
2513 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2514 }
2515
2516 r_type = ELF32_R_TYPE (rel->r_info);
2517 switch (r_type)
2518 {
2519 case R_CRIS_32_GOT:
2520 case R_CRIS_16_GOT:
2521 case R_CRIS_16_GOTPLT:
2522 case R_CRIS_32_GOTPLT:
2523 specific_refcount = h != NULL
2524 ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount
2525 : &local_got_refcounts[LGOT_REG_NDX (r_symndx)];
2526 break;
2527
2528 case R_CRIS_32_GD:
2529 case R_CRIS_32_GOT_GD:
2530 case R_CRIS_16_GOT_GD:
2531 got_element_size = 8;
2532 specific_refcount = h != NULL
2533 ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount
2534 : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)];
2535 break;
2536
2537 case R_CRIS_32_IE:
2538 case R_CRIS_16_GOT_TPREL:
2539 case R_CRIS_32_GOT_TPREL:
2540 specific_refcount = h != NULL
2541 ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount
2542 : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)];
2543 break;
2544
2545 default:
2546 break;
2547 }
2548
2549 switch (r_type)
2550 {
2551 case R_CRIS_32_IE:
2552 case R_CRIS_32_GD:
2553 case R_CRIS_16_GOT_TPREL:
2554 case R_CRIS_32_GOT_TPREL:
2555 case R_CRIS_32_GOT_GD:
2556 case R_CRIS_16_GOT_GD:
2557 case R_CRIS_16_GOT:
2558 case R_CRIS_32_GOT:
2559 if (h != NULL)
2560 {
2561 /* If the counters are 0 when we got here, we've
2562 miscounted somehow somewhere, an internal error. */
2563 BFD_ASSERT (h->got.refcount > 0);
2564 --h->got.refcount;
2565
2566 BFD_ASSERT (*specific_refcount > 0);
2567 --*specific_refcount;
2568 if (*specific_refcount == 0)
2569 {
2570 /* We don't need the .got entry any more. */
2571 sgot->size -= got_element_size;
2572 srelgot->size -= sizeof (Elf32_External_Rela);
2573 }
2574 break;
2575 }
2576
2577 local_got_reloc:
2578 if (local_got_refcounts != NULL)
2579 {
2580 /* If the counters are 0 when we got here, we've
2581 miscounted somehow somewhere, an internal error. */
2582 BFD_ASSERT (local_got_refcounts[r_symndx] > 0);
2583 --local_got_refcounts[r_symndx];
2584
2585 BFD_ASSERT (*specific_refcount > 0);
2586 --*specific_refcount;
2587 if (*specific_refcount == 0)
2588 {
2589 /* We don't need the .got entry any more. */
2590 sgot->size -= got_element_size;
2591 if (info->shared)
2592 srelgot->size -= sizeof (Elf32_External_Rela);
2593 }
2594 }
2595 break;
2596
2597 case R_CRIS_16_GOTPLT:
2598 case R_CRIS_32_GOTPLT:
2599 /* For local symbols, treat these like GOT relocs. */
2600 if (h == NULL)
2601 goto local_got_reloc;
2602 else
2603 /* For global symbols, adjust the reloc-specific refcount. */
2604 elf_cris_hash_entry (h)->gotplt_refcount--;
2605 /* Fall through. */
2606
2607 case R_CRIS_32_PLT_GOTREL:
2608 /* FIXME: We don't garbage-collect away the .got section. */
2609 if (local_got_refcounts != NULL)
2610 local_got_refcounts[-1]--;
2611 /* Fall through. */
2612
2613 case R_CRIS_8:
2614 case R_CRIS_16:
2615 case R_CRIS_32:
2616 case R_CRIS_8_PCREL:
2617 case R_CRIS_16_PCREL:
2618 case R_CRIS_32_PCREL:
2619 case R_CRIS_32_PLT_PCREL:
2620 /* Negate the increment we did in cris_elf_check_relocs. */
2621 if (h != NULL)
2622 {
2623 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2624 && h->plt.refcount > 0)
2625 --h->plt.refcount;
2626 }
2627 break;
2628
2629 case R_CRIS_32_DTPREL:
2630 /* This'd be a .dtpreld entry in e.g. debug info. */
2631 if ((sec->flags & SEC_ALLOC) == 0)
2632 break;
2633 /* Fall through. */
2634 case R_CRIS_16_DTPREL:
2635 htab->dtpmod_refcount--;
2636 if (htab->dtpmod_refcount == 0)
2637 htab->next_gotplt_entry -= 8;
2638 BFD_ASSERT (local_got_refcounts != NULL);
2639 local_got_refcounts[-1]--;
2640 break;
2641
2642 default:
2643 break;
2644 }
2645 }
2646
2647 return TRUE;
2648 }
2649
2650 /* The elf_backend_plt_sym_val hook function. */
2651
2652 static bfd_vma
2653 cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, const asection *plt,
2654 const arelent *rel)
2655 {
2656 bfd_size_type plt_entry_size;
2657 bfd_size_type pltoffs;
2658 bfd *abfd = plt->owner;
2659
2660 /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[]. */
2661 bfd_size_type plt_entry_got_offset = 2;
2662 bfd_size_type plt_sec_size;
2663 bfd_size_type got_vma_for_dyn;
2664 asection *got;
2665
2666 /* FIXME: the .got section should be readily available also when
2667 we're not linking. */
2668 if ((got = bfd_get_section_by_name (abfd, ".got")) == NULL)
2669 return (bfd_vma) -1;
2670
2671 plt_sec_size = bfd_section_size (plt->owner, plt);
2672 plt_entry_size
2673 = (bfd_get_mach (abfd) == bfd_mach_cris_v32
2674 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2675
2676 /* Data in PLT is GOT-relative for DYN, but absolute for EXE. */
2677 got_vma_for_dyn = (abfd->flags & EXEC_P) ? 0 : got->vma;
2678
2679 /* Because we can have merged GOT entries; a single .got entry for
2680 both GOT and the PLT part of the GOT (.got.plt), the index of the
2681 reloc in .rela.plt is not the same as the index in the PLT.
2682 Instead, we have to hunt down the GOT offset in the PLT that
2683 corresponds to that of this reloc. Unfortunately, we will only
2684 be called for the .rela.plt relocs, so we'll miss synthetic
2685 symbols for .plt entries with merged GOT entries. (FIXME:
2686 fixable by providing our own bfd_elf32_get_synthetic_symtab.
2687 Doesn't seem worthwile at time of this writing.) FIXME: we've
2688 gone from O(1) to O(N) (N number of PLT entries) for finding each
2689 PLT address. Shouldn't matter in practice though. */
2690
2691 for (pltoffs = plt_entry_size;
2692 pltoffs < plt_sec_size;
2693 pltoffs += plt_entry_size)
2694 {
2695 bfd_size_type got_offset;
2696 bfd_byte gotoffs_raw[4];
2697
2698 if (!bfd_get_section_contents (abfd, (asection *) plt, gotoffs_raw,
2699 pltoffs + plt_entry_got_offset,
2700 sizeof (gotoffs_raw)))
2701 return (bfd_vma) -1;
2702
2703 got_offset = bfd_get_32 (abfd, gotoffs_raw);
2704 if (got_offset + got_vma_for_dyn == rel->address)
2705 return plt->vma + pltoffs;
2706 }
2707
2708 /* While it's tempting to BFD_ASSERT that we shouldn't get here,
2709 that'd not be graceful behavior for invalid input. */
2710 return (bfd_vma) -1;
2711 }
2712
2713 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2714 entry but we found we will not create any. Called when we find we will
2715 not have any PLT for this symbol, by for example
2716 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2717 or elf_cris_size_dynamic_sections if no dynamic sections will be
2718 created (we're only linking static objects). */
2719
2720 static bfd_boolean
2721 elf_cris_adjust_gotplt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2722 {
2723 struct bfd_link_info *info = (struct bfd_link_info *) p;
2724
2725 /* A GOTPLT reloc, when activated, is supposed to be included into
2726 the PLT refcount. */
2727 BFD_ASSERT (h->gotplt_refcount == 0
2728 || h->gotplt_refcount <= h->root.plt.refcount);
2729
2730 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2731 if (h->gotplt_refcount <= 0)
2732 return TRUE;
2733
2734 if (h->reg_got_refcount > 0)
2735 {
2736 /* There's a GOT entry for this symbol. Just adjust the refcounts.
2737 Probably not necessary at this stage, but keeping them accurate
2738 helps avoiding surprises later. */
2739 h->root.got.refcount += h->gotplt_refcount;
2740 h->reg_got_refcount += h->gotplt_refcount;
2741 h->gotplt_refcount = 0;
2742 }
2743 else
2744 {
2745 /* No GOT entry for this symbol. We need to create one. */
2746 bfd *dynobj = elf_hash_table (info)->dynobj;
2747 asection *sgot;
2748 asection *srelgot;
2749
2750 BFD_ASSERT (dynobj != NULL);
2751 sgot = bfd_get_linker_section (dynobj, ".got");
2752 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
2753
2754 /* Put accurate refcounts there. */
2755 h->root.got.refcount += h->gotplt_refcount;
2756 h->reg_got_refcount = h->gotplt_refcount;
2757
2758 h->gotplt_refcount = 0;
2759
2760 /* We always have a .got and a .rela.got section if there were
2761 GOTPLT relocs in input. */
2762 BFD_ASSERT (sgot != NULL && srelgot != NULL);
2763
2764 /* Allocate space in the .got section. */
2765 sgot->size += 4;
2766
2767 /* Allocate relocation space. */
2768 srelgot->size += sizeof (Elf32_External_Rela);
2769 }
2770
2771 return TRUE;
2772 }
2773
2774 /* Try to fold PLT entries with GOT entries. There are two cases when we
2775 want to do this:
2776
2777 - When all PLT references are GOTPLT references, and there are GOT
2778 references, and this is not the executable. We don't have to
2779 generate a PLT at all.
2780
2781 - When there are both (ordinary) PLT references and GOT references,
2782 and this isn't the executable.
2783 We want to make the PLT reference use the ordinary GOT entry rather
2784 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2785 since the GOT entry will have to be resolved at startup anyway.
2786
2787 Though the latter case is handled when room for the PLT is allocated,
2788 not here.
2789
2790 By folding into the GOT, we may need a round-trip to a PLT in the
2791 executable for calls, a loss in performance. Still, losing a
2792 reloc is a win in size and at least in start-up time.
2793
2794 Note that this function is called before symbols are forced local by
2795 version scripts. The differing cases are handled by
2796 elf_cris_hide_symbol. */
2797
2798 static bfd_boolean
2799 elf_cris_try_fold_plt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2800 {
2801 struct bfd_link_info *info = (struct bfd_link_info *) p;
2802
2803 /* If there are no GOT references for this symbol, we can't fold any
2804 other reference so there's nothing to do. Likewise if there are no
2805 PLT references; GOTPLT references included. */
2806 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2807 return TRUE;
2808
2809 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2810 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2811
2812 if (h->gotplt_refcount == h->root.plt.refcount)
2813 {
2814 /* The only PLT references are GOTPLT references, and there are GOT
2815 references. Convert PLT to GOT references. */
2816 if (! elf_cris_adjust_gotplt_to_got (h, info))
2817 return FALSE;
2818
2819 /* Clear the PLT references, so no PLT will be created. */
2820 h->root.plt.offset = (bfd_vma) -1;
2821 }
2822
2823 return TRUE;
2824 }
2825
2826 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2827 to use a GOT entry (and create one) rather than requiring a GOTPLT
2828 entry. */
2829
2830 static void
2831 elf_cris_hide_symbol (struct bfd_link_info *info,
2832 struct elf_link_hash_entry *h,
2833 bfd_boolean force_local)
2834 {
2835 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2836
2837 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2838 }
2839
2840 /* Adjust a symbol defined by a dynamic object and referenced by a
2841 regular object. The current definition is in some section of the
2842 dynamic object, but we're not including those sections. We have to
2843 change the definition to something the rest of the link can
2844 understand. */
2845
2846 static bfd_boolean
2847 elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
2848 struct elf_link_hash_entry *h)
2849 {
2850 struct elf_cris_link_hash_table * htab;
2851 bfd *dynobj;
2852 asection *s;
2853 bfd_size_type plt_entry_size;
2854
2855 htab = elf_cris_hash_table (info);
2856 if (htab == NULL)
2857 return FALSE;
2858
2859 dynobj = elf_hash_table (info)->dynobj;
2860
2861 /* Make sure we know what is going on here. */
2862 BFD_ASSERT (dynobj != NULL
2863 && (h->needs_plt
2864 || h->u.weakdef != NULL
2865 || (h->def_dynamic
2866 && h->ref_regular
2867 && !h->def_regular)));
2868
2869 plt_entry_size
2870 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2871 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2872
2873 /* If this is a function, put it in the procedure linkage table. We
2874 will fill in the contents of the procedure linkage table later,
2875 when we know the address of the .got section. */
2876 if (h->type == STT_FUNC
2877 || h->needs_plt)
2878 {
2879 /* If we link a program (not a DSO), we'll get rid of unnecessary
2880 PLT entries; we point to the actual symbols -- even for pic
2881 relocs, because a program built with -fpic should have the same
2882 result as one built without -fpic, specifically considering weak
2883 symbols.
2884 FIXME: m68k and i386 differ here, for unclear reasons. */
2885 if (! info->shared
2886 && !h->def_dynamic)
2887 {
2888 /* This case can occur if we saw a PLT reloc in an input file,
2889 but the symbol was not defined by a dynamic object. In such
2890 a case, we don't actually need to build a procedure linkage
2891 table, and we can just do an absolute or PC reloc instead, or
2892 change a .got.plt index to a .got index for GOTPLT relocs. */
2893 BFD_ASSERT (h->needs_plt);
2894 h->needs_plt = 0;
2895 h->plt.offset = (bfd_vma) -1;
2896 return
2897 elf_cris_adjust_gotplt_to_got ((struct
2898 elf_cris_link_hash_entry *) h,
2899 info);
2900 }
2901
2902 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2903 where a pointer-equivalent symbol was unimportant (i.e. more
2904 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2905 of the PLT. We can't for the executable, because the GOT
2906 entries will point to the PLT there (and be constant). */
2907 if (info->shared
2908 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2909 h, info))
2910 return FALSE;
2911
2912 /* GC or folding may have rendered this entry unused. */
2913 if (h->plt.refcount <= 0)
2914 {
2915 h->needs_plt = 0;
2916 h->plt.offset = (bfd_vma) -1;
2917 return TRUE;
2918 }
2919
2920 /* Make sure this symbol is output as a dynamic symbol. */
2921 if (h->dynindx == -1)
2922 {
2923 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2924 return FALSE;
2925 }
2926
2927 s = bfd_get_linker_section (dynobj, ".plt");
2928 BFD_ASSERT (s != NULL);
2929
2930 /* If this is the first .plt entry, make room for the special
2931 first entry. */
2932 if (s->size == 0)
2933 s->size += plt_entry_size;
2934
2935 /* If this symbol is not defined in a regular file, and we are
2936 not generating a shared library, then set the symbol to this
2937 location in the .plt. */
2938 if (!info->shared
2939 && !h->def_regular)
2940 {
2941 h->root.u.def.section = s;
2942 h->root.u.def.value = s->size;
2943 }
2944
2945 /* If there's already a GOT entry, use that, not a .got.plt. A
2946 GOT field still has a reference count when we get here; it's
2947 not yet changed to an offset. We can't do this for an
2948 executable, because then the reloc associated with the PLT
2949 would get a non-PLT reloc pointing to the PLT. FIXME: Move
2950 this to elf_cris_try_fold_plt_to_got. */
2951 if (info->shared && h->got.refcount > 0)
2952 {
2953 h->got.refcount += h->plt.refcount;
2954
2955 /* Mark the PLT offset to use the GOT entry by setting the low
2956 bit in the plt offset; it is always a multiple of
2957 plt_entry_size (which is at least a multiple of 2). */
2958 BFD_ASSERT ((s->size % plt_entry_size) == 0);
2959
2960 /* Change the PLT refcount to an offset. */
2961 h->plt.offset = s->size;
2962
2963 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2964 that the got entry should be used instead. */
2965 BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2966 h)->gotplt_offset == 0);
2967
2968 /* Make room for this entry. */
2969 s->size += plt_entry_size;
2970
2971 return TRUE;
2972 }
2973
2974 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2975 h->plt.offset = s->size;
2976
2977 /* Make room for this entry. */
2978 s->size += plt_entry_size;
2979
2980 /* We also need to make an entry in the .got.plt section, which
2981 will be placed in the .got section by the linker script. */
2982 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2983 = htab->next_gotplt_entry;
2984 htab->next_gotplt_entry += 4;
2985
2986 s = bfd_get_linker_section (dynobj, ".got.plt");
2987 BFD_ASSERT (s != NULL);
2988 s->size += 4;
2989
2990 /* We also need to make an entry in the .rela.plt section. */
2991
2992 s = bfd_get_linker_section (dynobj, ".rela.plt");
2993 BFD_ASSERT (s != NULL);
2994 s->size += sizeof (Elf32_External_Rela);
2995
2996 return TRUE;
2997 }
2998
2999 /* Reinitialize the plt offset now that it is not used as a reference
3000 count any more. */
3001 h->plt.offset = (bfd_vma) -1;
3002
3003 /* If this is a weak symbol, and there is a real definition, the
3004 processor independent code will have arranged for us to see the
3005 real definition first, and we can just use the same value. */
3006 if (h->u.weakdef != NULL)
3007 {
3008 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3009 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3010 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3011 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3012 return TRUE;
3013 }
3014
3015 /* This is a reference to a symbol defined by a dynamic object which
3016 is not a function. */
3017
3018 /* If we are creating a shared library, we must presume that the
3019 only references to the symbol are via the global offset table.
3020 For such cases we need not do anything here; the relocations will
3021 be handled correctly by relocate_section. */
3022 if (info->shared)
3023 return TRUE;
3024
3025 /* If there are no references to this symbol that do not use the
3026 GOT, we don't need to generate a copy reloc. */
3027 if (!h->non_got_ref)
3028 return TRUE;
3029
3030 /* We must allocate the symbol in our .dynbss section, which will
3031 become part of the .bss section of the executable. There will be
3032 an entry for this symbol in the .dynsym section. The dynamic
3033 object will contain position independent code, so all references
3034 from the dynamic object to this symbol will go through the global
3035 offset table. The dynamic linker will use the .dynsym entry to
3036 determine the address it must put in the global offset table, so
3037 both the dynamic object and the regular object will refer to the
3038 same memory location for the variable. */
3039
3040 s = bfd_get_linker_section (dynobj, ".dynbss");
3041 BFD_ASSERT (s != NULL);
3042
3043 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
3044 copy the initial value out of the dynamic object and into the
3045 runtime process image. We need to remember the offset into the
3046 .rela.bss section we are going to use. */
3047 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
3048 {
3049 asection *srel;
3050
3051 srel = bfd_get_linker_section (dynobj, ".rela.bss");
3052 BFD_ASSERT (srel != NULL);
3053 srel->size += sizeof (Elf32_External_Rela);
3054 h->needs_copy = 1;
3055 }
3056
3057 return _bfd_elf_adjust_dynamic_copy (info, h, s);
3058 }
3059
3060 /* Adjust our "subclass" elements for an indirect symbol. */
3061
3062 static void
3063 elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
3064 struct elf_link_hash_entry *dir,
3065 struct elf_link_hash_entry *ind)
3066 {
3067 struct elf_cris_link_hash_entry *edir, *eind;
3068
3069 edir = (struct elf_cris_link_hash_entry *) dir;
3070 eind = (struct elf_cris_link_hash_entry *) ind;
3071
3072 /* Only indirect symbols are replaced; we're not interested in
3073 updating any of EIND's fields for other symbols. */
3074 if (eind->root.root.type != bfd_link_hash_indirect)
3075 {
3076 /* Still, we need to copy flags for e.g. weak definitions. */
3077 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3078 return;
3079 }
3080
3081 BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
3082
3083 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
3084 #define XMOVE(F) XMOVOPZ (F, +=, 0)
3085 if (eind->pcrel_relocs_copied != NULL)
3086 {
3087 if (edir->pcrel_relocs_copied != NULL)
3088 {
3089 struct elf_cris_pcrel_relocs_copied **pp;
3090 struct elf_cris_pcrel_relocs_copied *p;
3091
3092 /* Add reloc counts against the indirect sym to the direct sym
3093 list. Merge any entries against the same section. */
3094 for (pp = &eind->pcrel_relocs_copied; *pp != NULL;)
3095 {
3096 struct elf_cris_pcrel_relocs_copied *q;
3097 p = *pp;
3098 for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next)
3099 if (q->section == p->section)
3100 {
3101 q->count += p->count;
3102 *pp = p->next;
3103 break;
3104 }
3105 if (q == NULL)
3106 pp = &p->next;
3107 }
3108 *pp = edir->pcrel_relocs_copied;
3109 }
3110 XMOVOPZ (pcrel_relocs_copied, =, NULL);
3111 }
3112 XMOVE (gotplt_refcount);
3113 XMOVE (gotplt_offset);
3114 XMOVE (reg_got_refcount);
3115 XMOVE (tprel_refcount);
3116 XMOVE (dtp_refcount);
3117 #undef XMOVE
3118 #undef XMOVOPZ
3119
3120 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3121 }
3122
3123 /* Look through the relocs for a section during the first phase. */
3124
3125 static bfd_boolean
3126 cris_elf_check_relocs (bfd *abfd,
3127 struct bfd_link_info *info,
3128 asection *sec,
3129 const Elf_Internal_Rela *relocs)
3130 {
3131 struct elf_cris_link_hash_table * htab;
3132 bfd *dynobj;
3133 Elf_Internal_Shdr *symtab_hdr;
3134 struct elf_link_hash_entry **sym_hashes;
3135 bfd_signed_vma *local_got_refcounts;
3136 const Elf_Internal_Rela *rel;
3137 const Elf_Internal_Rela *rel_end;
3138 asection *sgot;
3139 asection *srelgot;
3140 asection *sreloc;
3141
3142 if (info->relocatable)
3143 return TRUE;
3144
3145 htab = elf_cris_hash_table (info);
3146 if (htab == NULL)
3147 return FALSE;
3148
3149 dynobj = elf_hash_table (info)->dynobj;
3150 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3151 sym_hashes = elf_sym_hashes (abfd);
3152 local_got_refcounts = elf_local_got_refcounts (abfd);
3153
3154 sgot = NULL;
3155 srelgot = NULL;
3156 sreloc = NULL;
3157
3158 rel_end = relocs + sec->reloc_count;
3159 for (rel = relocs; rel < rel_end; rel++)
3160 {
3161 struct elf_link_hash_entry *h;
3162 unsigned long r_symndx;
3163 enum elf_cris_reloc_type r_type;
3164 bfd_signed_vma got_element_size = 4;
3165 unsigned long r_symndx_lgot = INT_MAX;
3166
3167 r_symndx = ELF32_R_SYM (rel->r_info);
3168 if (r_symndx < symtab_hdr->sh_info)
3169 {
3170 h = NULL;
3171 r_symndx_lgot = LGOT_REG_NDX (r_symndx);
3172 }
3173 else
3174 {
3175 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3176 while (h->root.type == bfd_link_hash_indirect
3177 || h->root.type == bfd_link_hash_warning)
3178 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3179
3180 /* PR15323, ref flags aren't set for references in the same
3181 object. */
3182 h->root.non_ir_ref = 1;
3183 }
3184
3185 r_type = ELF32_R_TYPE (rel->r_info);
3186
3187 /* Some relocs require linker-created sections; we need to hang them
3188 on the first input bfd we found that contained dynamic relocs. */
3189 switch (r_type)
3190 {
3191 case R_CRIS_32_DTPREL:
3192 if ((sec->flags & SEC_ALLOC) == 0)
3193 /* This'd be a .dtpreld entry in e.g. debug info. We have
3194 several different switch statements below, but none of
3195 that is needed; we need no preparations for resolving
3196 R_CRIS_32_DTPREL into a non-allocated section (debug
3197 info), so let's just move on to the next
3198 relocation. */
3199 continue;
3200 /* Fall through. */
3201 case R_CRIS_16_DTPREL:
3202 /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3203 entry at index 3. */
3204 if (htab->dtpmod_refcount == 0)
3205 htab->next_gotplt_entry += 8;
3206
3207 htab->dtpmod_refcount++;
3208 /* Fall through. */
3209
3210 case R_CRIS_32_IE:
3211 case R_CRIS_32_GD:
3212 case R_CRIS_16_GOT_GD:
3213 case R_CRIS_32_GOT_GD:
3214 case R_CRIS_32_GOT_TPREL:
3215 case R_CRIS_16_GOT_TPREL:
3216 case R_CRIS_16_GOT:
3217 case R_CRIS_32_GOT:
3218 case R_CRIS_32_GOTREL:
3219 case R_CRIS_32_PLT_GOTREL:
3220 case R_CRIS_32_PLT_PCREL:
3221 case R_CRIS_16_GOTPLT:
3222 case R_CRIS_32_GOTPLT:
3223 if (dynobj == NULL)
3224 {
3225 elf_hash_table (info)->dynobj = dynobj = abfd;
3226
3227 /* We could handle this if we can get a handle on the
3228 output bfd in elf_cris_adjust_dynamic_symbol. Failing
3229 that, we must insist on dynobj being a specific mach. */
3230 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3231 {
3232 (*_bfd_error_handler)
3233 (_("%B, section %A:\n v10/v32 compatible object %s"
3234 " must not contain a PIC relocation"),
3235 abfd, sec);
3236 return FALSE;
3237 }
3238 }
3239
3240 if (sgot == NULL)
3241 {
3242 /* We may have a dynobj but no .got section, if machine-
3243 independent parts of the linker found a reason to create
3244 a dynobj. We want to create the .got section now, so we
3245 can assume it's always present whenever there's a dynobj.
3246 It's ok to call this function more than once. */
3247 if (!_bfd_elf_create_got_section (dynobj, info))
3248 return FALSE;
3249
3250 sgot = bfd_get_linker_section (dynobj, ".got");
3251 }
3252
3253 if (local_got_refcounts == NULL)
3254 {
3255 bfd_size_type amt;
3256
3257 /* We use index local_got_refcounts[-1] to count all
3258 GOT-relative relocations that do not have explicit
3259 GOT entries. */
3260 amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3261 amt *= sizeof (bfd_signed_vma);
3262 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3263 if (local_got_refcounts == NULL)
3264 return FALSE;
3265
3266 local_got_refcounts++;
3267 elf_local_got_refcounts (abfd) = local_got_refcounts;
3268 }
3269 break;
3270
3271 default:
3272 break;
3273 }
3274
3275 /* Some relocs require a global offset table (but perhaps not a
3276 specific GOT entry). */
3277 switch (r_type)
3278 {
3279 case R_CRIS_16_DTPREL:
3280 case R_CRIS_32_DTPREL:
3281 /* Not requesting .got.rela for an executable: the contents
3282 of the first entry is constant there. For a shared
3283 library, we need .got.rela for the R_CRIS_DTPMOD
3284 relocation at index 3. */
3285 if (!info->shared)
3286 break;
3287 /* Fall through. */
3288
3289 case R_CRIS_32_IE:
3290 case R_CRIS_32_GD:
3291 case R_CRIS_16_GOT_GD:
3292 case R_CRIS_32_GOT_GD:
3293 case R_CRIS_32_GOT_TPREL:
3294 case R_CRIS_16_GOT_TPREL:
3295 /* Fall through. */
3296
3297 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
3298 entry only for local symbols. Unfortunately, we don't know
3299 until later on if there's a version script that forces the
3300 symbol local. We must have the .rela.got section in place
3301 before we know if the symbol looks global now, so we need
3302 to treat the reloc just like for R_CRIS_16_GOT and
3303 R_CRIS_32_GOT. */
3304 case R_CRIS_16_GOTPLT:
3305 case R_CRIS_32_GOTPLT:
3306 case R_CRIS_16_GOT:
3307 case R_CRIS_32_GOT:
3308 if (srelgot == NULL
3309 && (h != NULL || info->shared))
3310 {
3311 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
3312 if (srelgot == NULL)
3313 {
3314 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3315 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3316 | SEC_READONLY);
3317 srelgot = bfd_make_section_anyway_with_flags (dynobj,
3318 ".rela.got",
3319 flags);
3320 if (srelgot == NULL
3321 || !bfd_set_section_alignment (dynobj, srelgot, 2))
3322 return FALSE;
3323 }
3324 }
3325 break;
3326
3327 default:
3328 break;
3329 }
3330
3331 /* Warn and error for invalid input. */
3332 switch (r_type)
3333 {
3334 case R_CRIS_32_IE:
3335 case R_CRIS_32_TPREL:
3336 case R_CRIS_16_TPREL:
3337 case R_CRIS_32_GD:
3338 if (info->shared)
3339 {
3340 (*_bfd_error_handler)
3341 (_("%B, section %A:\n relocation %s not valid"
3342 " in a shared object;"
3343 " typically an option mixup, recompile with -fPIC"),
3344 abfd,
3345 sec,
3346 cris_elf_howto_table[r_type].name);
3347 /* Don't return FALSE here; we want messages for all of
3348 these and the error behavior is ungraceful
3349 anyway. */
3350 }
3351 default:
3352 break;
3353 }
3354
3355 switch (r_type)
3356 {
3357 case R_CRIS_32_GD:
3358 case R_CRIS_16_GOT_GD:
3359 case R_CRIS_32_GOT_GD:
3360 /* These are requests for tls_index entries, run-time R_CRIS_DTP. */
3361 got_element_size = 8;
3362 r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3363 break;
3364
3365 case R_CRIS_16_DTPREL:
3366 case R_CRIS_32_DTPREL:
3367 /* These two just request for the constant-index
3368 module-local tls_index-sized GOT entry, which we add
3369 elsewhere. */
3370 break;
3371
3372 case R_CRIS_32_IE:
3373 case R_CRIS_32_GOT_TPREL:
3374 case R_CRIS_16_GOT_TPREL:
3375 r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3376
3377 /* Those relocs also require that a DSO is of type
3378 Initial Exec. Like other targets, we don't reset this
3379 flag even if the relocs are GC:ed away. */
3380 if (info->shared)
3381 info->flags |= DF_STATIC_TLS;
3382 break;
3383
3384 /* Let's list the other assembler-generated TLS-relocs too,
3385 just to show that they're not forgotten. */
3386 case R_CRIS_16_TPREL:
3387 case R_CRIS_32_TPREL:
3388 default:
3389 break;
3390 }
3391
3392 switch (r_type)
3393 {
3394 case R_CRIS_16_GOTPLT:
3395 case R_CRIS_32_GOTPLT:
3396 /* Mark that we need a GOT entry if the PLT entry (and its GOT
3397 entry) is eliminated. We can only do this for a non-local
3398 symbol. */
3399 if (h != NULL)
3400 {
3401 elf_cris_hash_entry (h)->gotplt_refcount++;
3402 goto handle_gotplt_reloc;
3403 }
3404 /* If h is NULL then this is a local symbol, and we must make a
3405 GOT entry for it, so handle it like a GOT reloc. */
3406 /* Fall through. */
3407
3408 case R_CRIS_32_IE:
3409 case R_CRIS_32_GD:
3410 case R_CRIS_16_GOT_GD:
3411 case R_CRIS_32_GOT_GD:
3412 case R_CRIS_32_GOT_TPREL:
3413 case R_CRIS_16_GOT_TPREL:
3414 case R_CRIS_16_GOT:
3415 case R_CRIS_32_GOT:
3416 /* This symbol requires a global offset table entry. */
3417 if (h != NULL)
3418 {
3419 if (h->got.refcount == 0)
3420 {
3421 /* Make sure this symbol is output as a dynamic symbol. */
3422 if (h->dynindx == -1)
3423 {
3424 if (!bfd_elf_link_record_dynamic_symbol (info, h))
3425 return FALSE;
3426 }
3427 }
3428
3429 /* Update the sum of reloc counts for this symbol. */
3430 h->got.refcount++;
3431
3432 switch (r_type)
3433 {
3434 case R_CRIS_16_GOT:
3435 case R_CRIS_32_GOT:
3436 if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3437 {
3438 /* Allocate space in the .got section. */
3439 sgot->size += got_element_size;
3440 /* Allocate relocation space. */
3441 srelgot->size += sizeof (Elf32_External_Rela);
3442 }
3443 elf_cris_hash_entry (h)->reg_got_refcount++;
3444 break;
3445
3446 case R_CRIS_32_GD:
3447 case R_CRIS_16_GOT_GD:
3448 case R_CRIS_32_GOT_GD:
3449 if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3450 {
3451 /* Allocate space in the .got section. */
3452 sgot->size += got_element_size;
3453 /* Allocate relocation space. */
3454 srelgot->size += sizeof (Elf32_External_Rela);
3455 }
3456 elf_cris_hash_entry (h)->dtp_refcount++;
3457 break;
3458
3459 case R_CRIS_32_IE:
3460 case R_CRIS_32_GOT_TPREL:
3461 case R_CRIS_16_GOT_TPREL:
3462 if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3463 {
3464 /* Allocate space in the .got section. */
3465 sgot->size += got_element_size;
3466 /* Allocate relocation space. */
3467 srelgot->size += sizeof (Elf32_External_Rela);
3468 }
3469 elf_cris_hash_entry (h)->tprel_refcount++;
3470 break;
3471
3472 default:
3473 BFD_FAIL ();
3474 break;
3475 }
3476 }
3477 else
3478 {
3479 /* This is a global offset table entry for a local symbol. */
3480 if (local_got_refcounts[r_symndx_lgot] == 0)
3481 {
3482 sgot->size += got_element_size;
3483 if (info->shared)
3484 {
3485 /* If we are generating a shared object, we need
3486 to output a R_CRIS_RELATIVE reloc so that the
3487 dynamic linker can adjust this GOT entry.
3488 Similarly for non-regular got entries. */
3489 srelgot->size += sizeof (Elf32_External_Rela);
3490 }
3491 }
3492 /* Update the reloc-specific count. */
3493 local_got_refcounts[r_symndx_lgot]++;
3494
3495 /* This one is the sum of all the others. */
3496 local_got_refcounts[r_symndx]++;
3497 }
3498 break;
3499
3500 case R_CRIS_16_DTPREL:
3501 case R_CRIS_32_DTPREL:
3502 case R_CRIS_32_GOTREL:
3503 /* This reference requires a global offset table.
3504 FIXME: The actual refcount isn't used currently; the .got
3505 section can't be removed if there were any references in the
3506 input. */
3507 local_got_refcounts[-1]++;
3508 break;
3509
3510 handle_gotplt_reloc:
3511
3512 case R_CRIS_32_PLT_GOTREL:
3513 /* This reference requires a global offset table. */
3514 local_got_refcounts[-1]++;
3515 /* Fall through. */
3516
3517 case R_CRIS_32_PLT_PCREL:
3518 /* This symbol requires a procedure linkage table entry. We
3519 actually build the entry in adjust_dynamic_symbol,
3520 because this might be a case of linking PIC code which is
3521 never referenced by a dynamic object, in which case we
3522 don't need to generate a procedure linkage table entry
3523 after all. */
3524
3525 /* Beware: if we'd check for visibility of the symbol here
3526 (and not marking the need for a PLT when non-visible), we'd
3527 get into trouble with keeping handling consistent with
3528 regards to relocs found before definition and GOTPLT
3529 handling. Eliminable PLT entries will be dealt with later
3530 anyway. */
3531 if (h == NULL)
3532 continue;
3533
3534 h->needs_plt = 1;
3535 h->plt.refcount++;
3536 break;
3537
3538 case R_CRIS_8:
3539 case R_CRIS_16:
3540 case R_CRIS_32:
3541 /* Let's help debug shared library creation. Any of these
3542 relocs *can* be used in shared libs, but pages containing
3543 them cannot be shared, so they're not appropriate for
3544 common use. Don't warn for sections we don't care about,
3545 such as debug sections or non-constant sections. We
3546 can't help tables of (global) function pointers, for
3547 example, though they must be emitted in a (writable) data
3548 section to avoid having impure text sections. */
3549 if (info->shared
3550 && (sec->flags & SEC_ALLOC) != 0
3551 && (sec->flags & SEC_READONLY) != 0)
3552 {
3553 /* FIXME: How do we make this optionally a warning only? */
3554 (*_bfd_error_handler)
3555 (_("%B, section %A:\n relocation %s should not"
3556 " be used in a shared object; recompile with -fPIC"),
3557 abfd,
3558 sec,
3559 cris_elf_howto_table[r_type].name);
3560 }
3561
3562 /* We don't need to handle relocs into sections not going into
3563 the "real" output. */
3564 if ((sec->flags & SEC_ALLOC) == 0)
3565 break;
3566
3567 if (h != NULL)
3568 {
3569 h->non_got_ref = 1;
3570
3571 /* Make sure a plt entry is created for this symbol if it
3572 turns out to be a function defined by a dynamic object. */
3573 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3574 h->plt.refcount++;
3575 }
3576
3577 /* If we are creating a shared library and this is not a local
3578 symbol, we need to copy the reloc into the shared library.
3579 However when linking with -Bsymbolic and this is a global
3580 symbol which is defined in an object we are including in the
3581 link (i.e., DEF_REGULAR is set), then we can resolve the
3582 reloc directly. At this point we have not seen all the input
3583 files, so it is possible that DEF_REGULAR is not set now but
3584 will be set later (it is never cleared). In case of a weak
3585 definition, DEF_REGULAR may be cleared later by a strong
3586 definition in a shared library. We account for that
3587 possibility below by storing information in the relocs_copied
3588 field of the hash table entry. A similar situation occurs
3589 when creating shared libraries and symbol visibility changes
3590 render the symbol local. */
3591
3592 /* No need to do anything if we're not creating a shared object. */
3593 if (! info->shared)
3594 break;
3595
3596 /* We may need to create a reloc section in the dynobj and made room
3597 for this reloc. */
3598 if (sreloc == NULL)
3599 {
3600 sreloc = _bfd_elf_make_dynamic_reloc_section
3601 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3602
3603 if (sreloc == NULL)
3604 return FALSE;
3605 }
3606
3607 if (sec->flags & SEC_READONLY)
3608 info->flags |= DF_TEXTREL;
3609
3610 sreloc->size += sizeof (Elf32_External_Rela);
3611 break;
3612
3613 case R_CRIS_8_PCREL:
3614 case R_CRIS_16_PCREL:
3615 case R_CRIS_32_PCREL:
3616 if (h != NULL)
3617 {
3618 h->non_got_ref = 1;
3619
3620 /* Make sure a plt entry is created for this symbol if it
3621 turns out to be a function defined by a dynamic object. */
3622 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3623 h->plt.refcount++;
3624 }
3625
3626 /* If we are creating a shared library and this is not a local
3627 symbol, we need to copy the reloc into the shared library.
3628 However when linking with -Bsymbolic and this is a global
3629 symbol which is defined in an object we are including in the
3630 link (i.e., DEF_REGULAR is set), then we can resolve the
3631 reloc directly. At this point we have not seen all the input
3632 files, so it is possible that DEF_REGULAR is not set now but
3633 will be set later (it is never cleared). In case of a weak
3634 definition, DEF_REGULAR may be cleared later by a strong
3635 definition in a shared library. We account for that
3636 possibility below by storing information in the relocs_copied
3637 field of the hash table entry. A similar situation occurs
3638 when creating shared libraries and symbol visibility changes
3639 render the symbol local. */
3640
3641 /* No need to do anything if we're not creating a shared object. */
3642 if (! info->shared)
3643 break;
3644
3645 /* We don't need to handle relocs into sections not going into
3646 the "real" output. */
3647 if ((sec->flags & SEC_ALLOC) == 0)
3648 break;
3649
3650 /* If the symbol is local, then we know already we can
3651 eliminate the reloc. */
3652 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3653 break;
3654
3655 /* If this is with -Bsymbolic and the symbol isn't weak, and
3656 is defined by an ordinary object (the ones we include in
3657 this shared library) then we can also eliminate the
3658 reloc. See comment above for more eliminable cases which
3659 we can't identify at this time. */
3660 if (info->symbolic
3661 && h->root.type != bfd_link_hash_defweak
3662 && h->def_regular)
3663 break;
3664
3665 /* We may need to create a reloc section in the dynobj and made room
3666 for this reloc. */
3667 if (sreloc == NULL)
3668 {
3669 sreloc = _bfd_elf_make_dynamic_reloc_section
3670 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3671
3672 if (sreloc == NULL)
3673 return FALSE;
3674 }
3675
3676 sreloc->size += sizeof (Elf32_External_Rela);
3677
3678 /* We count the number of PC relative relocations we have
3679 entered for this symbol, so that we can discard them
3680 again if the symbol is later defined by a regular object.
3681 We know that h is really a pointer to an
3682 elf_cris_link_hash_entry. */
3683 {
3684 struct elf_cris_link_hash_entry *eh;
3685 struct elf_cris_pcrel_relocs_copied *p;
3686
3687 eh = elf_cris_hash_entry (h);
3688
3689 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3690 if (p->section == sec)
3691 break;
3692
3693 if (p == NULL)
3694 {
3695 p = ((struct elf_cris_pcrel_relocs_copied *)
3696 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3697 if (p == NULL)
3698 return FALSE;
3699 p->next = eh->pcrel_relocs_copied;
3700 eh->pcrel_relocs_copied = p;
3701 p->section = sec;
3702 p->count = 0;
3703 p->r_type = r_type;
3704 }
3705
3706 ++p->count;
3707 }
3708 break;
3709
3710 /* This relocation describes the C++ object vtable hierarchy.
3711 Reconstruct it for later use during GC. */
3712 case R_CRIS_GNU_VTINHERIT:
3713 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3714 return FALSE;
3715 break;
3716
3717 /* This relocation describes which C++ vtable entries are actually
3718 used. Record for later use during GC. */
3719 case R_CRIS_GNU_VTENTRY:
3720 BFD_ASSERT (h != NULL);
3721 if (h != NULL
3722 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3723 return FALSE;
3724 break;
3725
3726 case R_CRIS_16_TPREL:
3727 case R_CRIS_32_TPREL:
3728 /* Already warned above, when necessary. */
3729 break;
3730
3731 default:
3732 /* Other relocs do not appear here. */
3733 bfd_set_error (bfd_error_bad_value);
3734 return FALSE;
3735 }
3736 }
3737
3738 return TRUE;
3739 }
3740
3741 /* Set the sizes of the dynamic sections. */
3742
3743 static bfd_boolean
3744 elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3745 struct bfd_link_info *info)
3746 {
3747 struct elf_cris_link_hash_table * htab;
3748 bfd *dynobj;
3749 asection *s;
3750 bfd_boolean plt;
3751 bfd_boolean relocs;
3752
3753 htab = elf_cris_hash_table (info);
3754 if (htab == NULL)
3755 return FALSE;
3756
3757 dynobj = elf_hash_table (info)->dynobj;
3758 BFD_ASSERT (dynobj != NULL);
3759
3760 if (elf_hash_table (info)->dynamic_sections_created)
3761 {
3762 /* Set the contents of the .interp section to the interpreter. */
3763 if (info->executable)
3764 {
3765 s = bfd_get_linker_section (dynobj, ".interp");
3766 BFD_ASSERT (s != NULL);
3767 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3768 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3769 }
3770 }
3771 else
3772 {
3773 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
3774 elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
3775 info);
3776
3777 /* We may have created entries in the .rela.got section.
3778 However, if we are not creating the dynamic sections, we will
3779 not actually use these entries. Reset the size of .rela.got,
3780 which will cause it to get stripped from the output file
3781 below. */
3782 s = bfd_get_linker_section (dynobj, ".rela.got");
3783 if (s != NULL)
3784 s->size = 0;
3785 }
3786
3787 /* If this is a -Bsymbolic shared link, then we need to discard all PC
3788 relative relocs against symbols defined in a regular object. We
3789 allocated space for them in the check_relocs routine, but we will not
3790 fill them in in the relocate_section routine. We also discard space
3791 for relocs that have become for local symbols due to symbol
3792 visibility changes. For programs, we discard space for relocs for
3793 symbols not referenced by any dynamic object. */
3794 if (info->shared)
3795 elf_cris_link_hash_traverse (htab,
3796 elf_cris_discard_excess_dso_dynamics,
3797 info);
3798 else
3799 elf_cris_link_hash_traverse (htab,
3800 elf_cris_discard_excess_program_dynamics,
3801 info);
3802
3803 /* The check_relocs and adjust_dynamic_symbol entry points have
3804 determined the sizes of the various dynamic sections. Allocate
3805 memory for them. */
3806 plt = FALSE;
3807 relocs = FALSE;
3808 for (s = dynobj->sections; s != NULL; s = s->next)
3809 {
3810 const char *name;
3811
3812 if ((s->flags & SEC_LINKER_CREATED) == 0)
3813 continue;
3814
3815 /* It's OK to base decisions on the section name, because none
3816 of the dynobj section names depend upon the input files. */
3817 name = bfd_get_section_name (dynobj, s);
3818
3819 if (strcmp (name, ".plt") == 0)
3820 {
3821 /* Remember whether there is a PLT. */
3822 plt = s->size != 0;
3823 }
3824 else if (strcmp (name, ".got.plt") == 0)
3825 {
3826 /* The .got.plt contains the .got header as well as the
3827 actual .got.plt contents. The .got header may contain a
3828 R_CRIS_DTPMOD entry at index 3. */
3829 s->size += htab->dtpmod_refcount != 0
3830 ? 8 : 0;
3831 }
3832 else if (CONST_STRNEQ (name, ".rela"))
3833 {
3834 if (strcmp (name, ".rela.got") == 0
3835 && htab->dtpmod_refcount != 0
3836 && info->shared)
3837 s->size += sizeof (Elf32_External_Rela);
3838
3839 if (s->size != 0)
3840 {
3841 /* Remember whether there are any reloc sections other
3842 than .rela.plt. */
3843 if (strcmp (name, ".rela.plt") != 0)
3844 relocs = TRUE;
3845
3846 /* We use the reloc_count field as a counter if we need
3847 to copy relocs into the output file. */
3848 s->reloc_count = 0;
3849 }
3850 }
3851 else if (! CONST_STRNEQ (name, ".got")
3852 && strcmp (name, ".dynbss") != 0)
3853 {
3854 /* It's not one of our sections, so don't allocate space. */
3855 continue;
3856 }
3857
3858 if (s->size == 0)
3859 {
3860 /* If we don't need this section, strip it from the
3861 output file. This is mostly to handle .rela.bss and
3862 .rela.plt. We must create both sections in
3863 create_dynamic_sections, because they must be created
3864 before the linker maps input sections to output
3865 sections. The linker does that before
3866 adjust_dynamic_symbol is called, and it is that
3867 function which decides whether anything needs to go
3868 into these sections. */
3869 s->flags |= SEC_EXCLUDE;
3870 continue;
3871 }
3872
3873 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3874 continue;
3875
3876 /* Allocate memory for the section contents. We use bfd_zalloc here
3877 in case unused entries are not reclaimed before the section's
3878 contents are written out. This should not happen, but this way
3879 if it does, we will not write out garbage. For reloc sections,
3880 this will make entries have the type R_CRIS_NONE. */
3881 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3882 if (s->contents == NULL)
3883 return FALSE;
3884 }
3885
3886 if (elf_hash_table (info)->dynamic_sections_created)
3887 {
3888 /* Add some entries to the .dynamic section. We fill in the
3889 values later, in elf_cris_finish_dynamic_sections, but we
3890 must add the entries now so that we get the correct size for
3891 the .dynamic section. The DT_DEBUG entry is filled in by the
3892 dynamic linker and used by the debugger. */
3893 #define add_dynamic_entry(TAG, VAL) \
3894 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3895
3896 if (!info->shared)
3897 {
3898 if (!add_dynamic_entry (DT_DEBUG, 0))
3899 return FALSE;
3900 }
3901
3902 if (plt)
3903 {
3904 if (!add_dynamic_entry (DT_PLTGOT, 0)
3905 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3906 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3907 || !add_dynamic_entry (DT_JMPREL, 0))
3908 return FALSE;
3909 }
3910
3911 if (relocs)
3912 {
3913 if (!add_dynamic_entry (DT_RELA, 0)
3914 || !add_dynamic_entry (DT_RELASZ, 0)
3915 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3916 return FALSE;
3917 }
3918
3919 if ((info->flags & DF_TEXTREL) != 0)
3920 {
3921 if (!add_dynamic_entry (DT_TEXTREL, 0))
3922 return FALSE;
3923 info->flags |= DF_TEXTREL;
3924 }
3925 }
3926 #undef add_dynamic_entry
3927
3928 return TRUE;
3929 }
3930
3931 /* This function is called via elf_cris_link_hash_traverse if we are
3932 creating a shared object. In the -Bsymbolic case, it discards the
3933 space allocated to copy PC relative relocs against symbols which
3934 are defined in regular objects. For the normal non-symbolic case,
3935 we also discard space for relocs that have become local due to
3936 symbol visibility changes. We allocated space for them in the
3937 check_relocs routine, but we won't fill them in in the
3938 relocate_section routine. */
3939
3940 static bfd_boolean
3941 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *h,
3942 void * inf)
3943 {
3944 struct elf_cris_pcrel_relocs_copied *s;
3945 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3946
3947 /* If a symbol has been forced local or we have found a regular
3948 definition for the symbolic link case, then we won't be needing
3949 any relocs. */
3950 if (h->root.def_regular
3951 && (h->root.forced_local
3952 || info->symbolic))
3953 {
3954 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3955 {
3956 asection *sreloc
3957 = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info)
3958 ->dynobj,
3959 s->section,
3960 /*rela?*/ TRUE);
3961 sreloc->size -= s->count * sizeof (Elf32_External_Rela);
3962 }
3963 return TRUE;
3964 }
3965
3966 /* If we have accounted for PC-relative relocs for read-only
3967 sections, now is the time to warn for them. We can't do it in
3968 cris_elf_check_relocs, because we don't know the status of all
3969 symbols at that time (and it's common to force symbols local
3970 late). */
3971
3972 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3973 if ((s->section->flags & SEC_READONLY) != 0)
3974 {
3975 /* FIXME: How do we make this optionally a warning only? */
3976 (*_bfd_error_handler)
3977 (_("%B, section `%A', to symbol `%s':\n"
3978 " relocation %s should not be used"
3979 " in a shared object; recompile with -fPIC"),
3980 s->section->owner,
3981 s->section,
3982 h->root.root.root.string,
3983 cris_elf_howto_table[s->r_type].name);
3984
3985 info->flags |= DF_TEXTREL;
3986 }
3987
3988 return TRUE;
3989 }
3990
3991 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3992 creating a shared object. We discard space for relocs for symbols put
3993 in the .got, but which we found we do not have to resolve at run-time. */
3994
3995 static bfd_boolean
3996 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *h,
3997 void * inf)
3998 {
3999 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4000
4001 /* If we're not creating a shared library and have a symbol which is
4002 referred to by .got references, but the symbol is defined locally,
4003 (or rather, not defined by a DSO) then lose the reloc for the .got
4004 (don't allocate room for it). Likewise for relocs for something
4005 for which we create a PLT. */
4006 if (!h->root.def_dynamic
4007 || h->root.plt.refcount > 0)
4008 {
4009 if (h->reg_got_refcount > 0
4010 /* The size of this section is only valid and in sync with the
4011 various reference counts if we do dynamic; don't decrement it
4012 otherwise. */
4013 && elf_hash_table (info)->dynamic_sections_created)
4014 {
4015 bfd *dynobj = elf_hash_table (info)->dynobj;
4016 asection *srelgot;
4017
4018 BFD_ASSERT (dynobj != NULL);
4019
4020 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
4021
4022 BFD_ASSERT (srelgot != NULL);
4023
4024 srelgot->size -= sizeof (Elf32_External_Rela);
4025 }
4026
4027 /* If the locally-defined symbol isn't used by a DSO, then we don't
4028 have to export it as a dynamic symbol. This was already done for
4029 functions; doing this for all symbols would presumably not
4030 introduce new problems. Of course we don't do this if we're
4031 exporting all dynamic symbols. */
4032 if (! info->export_dynamic
4033 && h->root.dynindx != -1
4034 && !h->root.def_dynamic
4035 && !h->root.ref_dynamic)
4036 {
4037 h->root.dynindx = -1;
4038 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4039 h->root.dynstr_index);
4040 }
4041 }
4042
4043 return TRUE;
4044 }
4045
4046 /* Reject a file depending on presence and expectation of prefixed
4047 underscores on symbols. */
4048
4049 static bfd_boolean
4050 cris_elf_object_p (bfd *abfd)
4051 {
4052 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
4053 return FALSE;
4054
4055 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
4056 return (bfd_get_symbol_leading_char (abfd) == '_');
4057 else
4058 return (bfd_get_symbol_leading_char (abfd) == 0);
4059 }
4060
4061 /* Mark presence or absence of leading underscore. Set machine type
4062 flags from mach type. */
4063
4064 static void
4065 cris_elf_final_write_processing (bfd *abfd,
4066 bfd_boolean linker ATTRIBUTE_UNUSED)
4067 {
4068 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
4069
4070 e_flags &= ~EF_CRIS_UNDERSCORE;
4071 if (bfd_get_symbol_leading_char (abfd) == '_')
4072 e_flags |= EF_CRIS_UNDERSCORE;
4073
4074 switch (bfd_get_mach (abfd))
4075 {
4076 case bfd_mach_cris_v0_v10:
4077 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
4078 break;
4079
4080 case bfd_mach_cris_v10_v32:
4081 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
4082 break;
4083
4084 case bfd_mach_cris_v32:
4085 e_flags |= EF_CRIS_VARIANT_V32;
4086 break;
4087
4088 default:
4089 _bfd_abort (__FILE__, __LINE__,
4090 _("Unexpected machine number"));
4091 }
4092
4093 elf_elfheader (abfd)->e_flags = e_flags;
4094 }
4095
4096 /* Set the mach type from e_flags value. */
4097
4098 static bfd_boolean
4099 cris_elf_set_mach_from_flags (bfd *abfd,
4100 unsigned long flags)
4101 {
4102 switch (flags & EF_CRIS_VARIANT_MASK)
4103 {
4104 case EF_CRIS_VARIANT_ANY_V0_V10:
4105 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
4106 break;
4107
4108 case EF_CRIS_VARIANT_V32:
4109 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
4110 break;
4111
4112 case EF_CRIS_VARIANT_COMMON_V10_V32:
4113 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
4114 break;
4115
4116 default:
4117 /* Since we don't recognize them, we obviously can't support them
4118 with this code; we'd have to require that all future handling
4119 would be optional. */
4120 bfd_set_error (bfd_error_wrong_format);
4121 return FALSE;
4122 }
4123
4124 return TRUE;
4125 }
4126
4127 /* Display the flags field. */
4128
4129 static bfd_boolean
4130 cris_elf_print_private_bfd_data (bfd *abfd, void * ptr)
4131 {
4132 FILE *file = (FILE *) ptr;
4133
4134 BFD_ASSERT (abfd != NULL && ptr != NULL);
4135
4136 _bfd_elf_print_private_bfd_data (abfd, ptr);
4137
4138 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4139
4140 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
4141 fprintf (file, _(" [symbols have a _ prefix]"));
4142 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4143 == EF_CRIS_VARIANT_COMMON_V10_V32)
4144 fprintf (file, _(" [v10 and v32]"));
4145 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4146 == EF_CRIS_VARIANT_V32)
4147 fprintf (file, _(" [v32]"));
4148
4149 fputc ('\n', file);
4150 return TRUE;
4151 }
4152
4153 /* Don't mix files with and without a leading underscore. */
4154
4155 static bfd_boolean
4156 cris_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4157 {
4158 int imach, omach;
4159
4160 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4161 return FALSE;
4162
4163 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4164 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4165 return TRUE;
4166
4167 imach = bfd_get_mach (ibfd);
4168
4169 if (! elf_flags_init (obfd))
4170 {
4171 /* This happens when ld starts out with a 'blank' output file. */
4172 elf_flags_init (obfd) = TRUE;
4173
4174 /* We ignore the linker-set mach, and instead set it according to
4175 the first input file. This would also happen if we could
4176 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
4177 This allows us to keep the same linker config across
4178 cris(v0..v10) and crisv32. The drawback is that we can't force
4179 the output type, which might be a sane thing to do for a
4180 v10+v32 compatibility object. */
4181 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4182 return FALSE;
4183 }
4184
4185 if (bfd_get_symbol_leading_char (ibfd)
4186 != bfd_get_symbol_leading_char (obfd))
4187 {
4188 (*_bfd_error_handler)
4189 (bfd_get_symbol_leading_char (ibfd) == '_'
4190 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
4191 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
4192 ibfd);
4193 bfd_set_error (bfd_error_bad_value);
4194 return FALSE;
4195 }
4196
4197 omach = bfd_get_mach (obfd);
4198
4199 if (imach != omach)
4200 {
4201 /* We can get an incompatible combination only if either is
4202 bfd_mach_cris_v32, and the other one isn't compatible. */
4203 if ((imach == bfd_mach_cris_v32
4204 && omach != bfd_mach_cris_v10_v32)
4205 || (omach == bfd_mach_cris_v32
4206 && imach != bfd_mach_cris_v10_v32))
4207 {
4208 (*_bfd_error_handler)
4209 ((imach == bfd_mach_cris_v32)
4210 ? _("%B contains CRIS v32 code, incompatible"
4211 " with previous objects")
4212 : _("%B contains non-CRIS-v32 code, incompatible"
4213 " with previous objects"),
4214 ibfd);
4215 bfd_set_error (bfd_error_bad_value);
4216 return FALSE;
4217 }
4218
4219 /* We don't have to check the case where the input is compatible
4220 with v10 and v32, because the output is already known to be set
4221 to the other (compatible) mach. */
4222 if (omach == bfd_mach_cris_v10_v32
4223 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4224 return FALSE;
4225 }
4226
4227 return TRUE;
4228 }
4229
4230 /* Do side-effects of e_flags copying to obfd. */
4231
4232 static bfd_boolean
4233 cris_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4234 {
4235 /* Call the base function. */
4236 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
4237 return FALSE;
4238
4239 /* If output is big-endian for some obscure reason, stop here. */
4240 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
4241 return FALSE;
4242
4243 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4244 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4245 return TRUE;
4246
4247 /* Do what we really came here for. */
4248 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
4249 }
4250
4251 static enum elf_reloc_type_class
4252 elf_cris_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4253 const asection *rel_sec ATTRIBUTE_UNUSED,
4254 const Elf_Internal_Rela *rela)
4255 {
4256 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
4257 switch (r_type)
4258 {
4259 case R_CRIS_RELATIVE:
4260 return reloc_class_relative;
4261 case R_CRIS_JUMP_SLOT:
4262 return reloc_class_plt;
4263 case R_CRIS_COPY:
4264 return reloc_class_copy;
4265 default:
4266 return reloc_class_normal;
4267 }
4268 }
4269
4270 /* The elf_backend_got_elt_size worker. For one symbol, we can have up to
4271 two GOT entries from three types with two different sizes. We handle
4272 it as a single entry, so we can use the regular offset-calculation
4273 machinery. */
4274
4275 static bfd_vma
4276 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
4277 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4278 struct elf_link_hash_entry *hr,
4279 bfd *ibfd,
4280 unsigned long symndx)
4281 {
4282 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4283 bfd_vma eltsiz = 0;
4284
4285 /* We may have one regular GOT entry or up to two TLS GOT
4286 entries. */
4287 if (h == NULL)
4288 {
4289 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4290 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4291
4292 BFD_ASSERT (local_got_refcounts != NULL);
4293
4294 if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4295 {
4296 /* We can't have a variable referred to both as a regular
4297 variable and through TLS relocs. */
4298 BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4299 && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4300 return 4;
4301 }
4302
4303 if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4304 eltsiz += 8;
4305
4306 if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4307 eltsiz += 4;
4308 }
4309 else
4310 {
4311 struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4312 if (hh->reg_got_refcount > 0)
4313 {
4314 /* The actual error-on-input is emitted elsewhere. */
4315 BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4316 return 4;
4317 }
4318
4319 if (hh->dtp_refcount > 0)
4320 eltsiz += 8;
4321
4322 if (hh->tprel_refcount > 0)
4323 eltsiz += 4;
4324 }
4325
4326 /* We're only called when h->got.refcount is non-zero, so we must
4327 have a non-zero size. */
4328 BFD_ASSERT (eltsiz != 0);
4329 return eltsiz;
4330 }
4331 \f
4332 #define ELF_ARCH bfd_arch_cris
4333 #define ELF_TARGET_ID CRIS_ELF_DATA
4334 #define ELF_MACHINE_CODE EM_CRIS
4335 #define ELF_MAXPAGESIZE 0x2000
4336
4337 #define TARGET_LITTLE_SYM cris_elf32_vec
4338 #define TARGET_LITTLE_NAME "elf32-cris"
4339 #define elf_symbol_leading_char 0
4340
4341 #define elf_info_to_howto_rel NULL
4342 #define elf_info_to_howto cris_info_to_howto_rela
4343 #define elf_backend_relocate_section cris_elf_relocate_section
4344 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
4345 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook
4346 #define elf_backend_plt_sym_val cris_elf_plt_sym_val
4347 #define elf_backend_check_relocs cris_elf_check_relocs
4348 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
4349 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
4350
4351 #define elf_backend_can_gc_sections 1
4352 #define elf_backend_can_refcount 1
4353
4354 #define elf_backend_object_p cris_elf_object_p
4355 #define elf_backend_final_write_processing \
4356 cris_elf_final_write_processing
4357 #define bfd_elf32_bfd_print_private_bfd_data \
4358 cris_elf_print_private_bfd_data
4359 #define bfd_elf32_bfd_merge_private_bfd_data \
4360 cris_elf_merge_private_bfd_data
4361 #define bfd_elf32_bfd_copy_private_bfd_data \
4362 cris_elf_copy_private_bfd_data
4363
4364 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
4365 #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
4366
4367 #define bfd_elf32_bfd_link_hash_table_create \
4368 elf_cris_link_hash_table_create
4369 #define elf_backend_adjust_dynamic_symbol \
4370 elf_cris_adjust_dynamic_symbol
4371 #define elf_backend_copy_indirect_symbol \
4372 elf_cris_copy_indirect_symbol
4373 #define elf_backend_size_dynamic_sections \
4374 elf_cris_size_dynamic_sections
4375 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4376 #define elf_backend_finish_dynamic_symbol \
4377 elf_cris_finish_dynamic_symbol
4378 #define elf_backend_finish_dynamic_sections \
4379 elf_cris_finish_dynamic_sections
4380 #define elf_backend_create_dynamic_sections \
4381 _bfd_elf_create_dynamic_sections
4382 #define bfd_elf32_bfd_final_link \
4383 bfd_elf_gc_common_final_link
4384 #define elf_backend_hide_symbol elf_cris_hide_symbol
4385 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
4386
4387 #define elf_backend_want_got_plt 1
4388 #define elf_backend_plt_readonly 1
4389 #define elf_backend_want_plt_sym 0
4390 #define elf_backend_got_header_size 12
4391 #define elf_backend_got_elt_size elf_cris_got_elt_size
4392
4393 /* Later, we my want to optimize RELA entries into REL entries for dynamic
4394 linking and libraries (if it's a win of any significance). Until then,
4395 take the easy route. */
4396 #define elf_backend_may_use_rel_p 0
4397 #define elf_backend_may_use_rela_p 1
4398 #define elf_backend_rela_normal 1
4399
4400 #include "elf32-target.h"
4401
4402 #undef TARGET_LITTLE_SYM
4403 #undef TARGET_LITTLE_NAME
4404 #undef elf_symbol_leading_char
4405
4406 #define TARGET_LITTLE_SYM cris_elf32_us_vec
4407 #define TARGET_LITTLE_NAME "elf32-us-cris"
4408 #define elf_symbol_leading_char '_'
4409 #undef elf32_bed
4410 #define elf32_bed elf32_us_cris_bed
4411
4412 #include "elf32-target.h"
GDB Binutils - Deliverables
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