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[thirdparty/binutils-gdb.git] / bfd / elf32-cris.c
1 /* CRIS-specific support for 32-bit ELF.
2 Copyright (C) 2000-2018 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 3, /* size (0 = byte, 1 = short, 2 = long) */
44 0, /* bitsize */
45 FALSE, /* pc_relative */
46 0, /* bitpos */
47 complain_overflow_dont, /* 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 if (r_type >= R_CRIS_max)
465 {
466 /* xgettext:c-format */
467 _bfd_error_handler (_("%B: invalid CRIS reloc number: %d"), abfd, r_type);
468 r_type = 0;
469 }
470 cache_ptr->howto = & cris_elf_howto_table [r_type];
471 }
472
473 bfd_reloc_status_type
474 cris_elf_pcrel_reloc (bfd *abfd ATTRIBUTE_UNUSED,
475 arelent *reloc_entry,
476 asymbol *symbol,
477 void * data ATTRIBUTE_UNUSED,
478 asection *input_section,
479 bfd *output_bfd,
480 char **error_message ATTRIBUTE_UNUSED)
481 {
482 /* By default (using only bfd_elf_generic_reloc when linking to
483 non-ELF formats) PC-relative relocs are relative to the beginning
484 of the reloc. CRIS PC-relative relocs are relative to the position
485 *after* the reloc because that's what pre-CRISv32 PC points to
486 after reading an insn field with that reloc. (For CRISv32, PC is
487 actually relative to the start of the insn, but we keep the old
488 definition.) Still, we use as much generic machinery as we can.
489
490 Only adjust when doing a final link. */
491 if (output_bfd == (bfd *) NULL)
492 reloc_entry->addend -= 1 << reloc_entry->howto->size;
493
494 return
495 bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
496 input_section, output_bfd, error_message);
497 }
498 \f
499 /* Support for core dump NOTE sections.
500 The slightly unintuitive code layout is an attempt to keep at least
501 some similarities with other ports, hoping to simplify general
502 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
503
504 static bfd_boolean
505 cris_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
506 {
507 int offset;
508 size_t size;
509
510 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
511 switch (note->descsz)
512 {
513 default:
514 return FALSE;
515
516 case 202: /* Linux/CRISv32 */
517 /* pr_cursig */
518 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
519
520 /* pr_pid */
521 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
522
523 /* pr_reg */
524 offset = 70;
525 size = 128;
526
527 break;
528 }
529 else
530 switch (note->descsz)
531 {
532 default:
533 return FALSE;
534
535 case 214: /* Linux/CRIS */
536 /* pr_cursig */
537 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
538
539 /* pr_pid */
540 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
541
542 /* pr_reg */
543 offset = 70;
544 size = 140;
545
546 break;
547 }
548
549 /* Make a ".reg/999" section. */
550 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
551 size, note->descpos + offset);
552 }
553
554 static bfd_boolean
555 cris_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
556 {
557 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
558 switch (note->descsz)
559 {
560 default:
561 return FALSE;
562
563 case 124: /* Linux/CRISv32 elf_prpsinfo */
564 elf_tdata (abfd)->core->program
565 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
566 elf_tdata (abfd)->core->command
567 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
568 }
569 else
570 switch (note->descsz)
571 {
572 default:
573 return FALSE;
574
575 case 124: /* Linux/CRIS elf_prpsinfo */
576 elf_tdata (abfd)->core->program
577 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
578 elf_tdata (abfd)->core->command
579 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
580 }
581
582 /* Note that for some reason, a spurious space is tacked
583 onto the end of the args in some (at least one anyway)
584 implementations, so strip it off if it exists. */
585
586 {
587 char *command = elf_tdata (abfd)->core->command;
588 int n = strlen (command);
589
590 if (0 < n && command[n - 1] == ' ')
591 command[n - 1] = '\0';
592 }
593
594 return TRUE;
595 }
596 \f
597 /* The name of the dynamic interpreter. This is put in the .interp
598 section. */
599
600 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
601
602 /* The size in bytes of an entry in the procedure linkage table. */
603
604 #define PLT_ENTRY_SIZE 20
605 #define PLT_ENTRY_SIZE_V32 26
606
607 /* The first entry in an absolute procedure linkage table looks like this. */
608
609 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
610 {
611 0xfc, 0xe1,
612 0x7e, 0x7e, /* push mof. */
613 0x7f, 0x0d, /* (dip [pc+]) */
614 0, 0, 0, 0, /* Replaced with address of .got + 4. */
615 0x30, 0x7a, /* move [...],mof */
616 0x7f, 0x0d, /* (dip [pc+]) */
617 0, 0, 0, 0, /* Replaced with address of .got + 8. */
618 0x30, 0x09 /* jump [...] */
619 };
620
621 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
622 {
623 0x84, 0xe2, /* subq 4,$sp */
624 0x6f, 0xfe, /* move.d 0,$acr */
625 0, 0, 0, 0, /* Replaced by address of .got + 4. */
626 0x7e, 0x7a, /* move $mof,[$sp] */
627 0x3f, 0x7a, /* move [$acr],$mof */
628 0x04, 0xf2, /* addq 4,acr */
629 0x6f, 0xfa, /* move.d [$acr],$acr */
630 0xbf, 0x09, /* jump $acr */
631 0xb0, 0x05, /* nop */
632 0, 0 /* Pad out to 26 bytes. */
633 };
634
635 /* Subsequent entries in an absolute procedure linkage table look like
636 this. */
637
638 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
639 {
640 0x7f, 0x0d, /* (dip [pc+]) */
641 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
642 0x30, 0x09, /* jump [...] */
643 0x3f, 0x7e, /* move [pc+],mof */
644 0, 0, 0, 0, /* Replaced with offset into relocation table. */
645 0x2f, 0xfe, /* add.d [pc+],pc */
646 0xec, 0xff,
647 0xff, 0xff /* Replaced with offset to start of .plt. */
648 };
649
650 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
651 {
652 0x6f, 0xfe, /* move.d 0,$acr */
653 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
654 0x6f, 0xfa, /* move.d [$acr],$acr */
655 0xbf, 0x09, /* jump $acr */
656 0xb0, 0x05, /* nop */
657 0x3f, 0x7e, /* move 0,mof */
658 0, 0, 0, 0, /* Replaced with offset into relocation table. */
659 0xbf, 0x0e, /* ba start_of_plt0_entry */
660 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
661 0xb0, 0x05 /* nop */
662 };
663
664 /* The first entry in a PIC procedure linkage table looks like this. */
665
666 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
667 {
668 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
669 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
670 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
671 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
672 };
673
674 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
675 {
676 0x84, 0xe2, /* subq 4,$sp */
677 0x04, 0x01, /* addoq 4,$r0,$acr */
678 0x7e, 0x7a, /* move $mof,[$sp] */
679 0x3f, 0x7a, /* move [$acr],$mof */
680 0x04, 0xf2, /* addq 4,$acr */
681 0x6f, 0xfa, /* move.d [$acr],$acr */
682 0xbf, 0x09, /* jump $acr */
683 0xb0, 0x05, /* nop */
684 0, 0, /* Pad out to 26 bytes. */
685 0, 0, 0, 0,
686 0, 0, 0, 0
687 };
688
689 /* Subsequent entries in a PIC procedure linkage table look like this. */
690
691 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
692 {
693 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
694 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
695 0x30, 0x09, /* jump [...] */
696 0x3f, 0x7e, /* move [pc+],mof */
697 0, 0, 0, 0, /* Replaced with offset into relocation table. */
698 0x2f, 0xfe, /* add.d [pc+],pc */
699 0xec, 0xff, /* Replaced with offset to start of .plt. */
700 0xff, 0xff
701 };
702
703 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
704 {
705 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
706 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
707 0x6f, 0xfa, /* move.d [$acr],$acr */
708 0xbf, 0x09, /* jump $acr */
709 0xb0, 0x05, /* nop */
710 0x3f, 0x7e, /* move relocoffs,$mof */
711 0, 0, 0, 0, /* Replaced with offset into relocation table. */
712 0xbf, 0x0e, /* ba start_of_plt */
713 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
714 0xb0, 0x05 /* nop */
715 };
716 \f
717 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
718 (and most other PIC/shlib stuff). Check that we don't drift away
719 without reason.
720
721 The CRIS linker, like the m68k and i386 linkers (and probably the rest
722 too) needs to keep track of the number of relocs that it decides to
723 copy in check_relocs for each symbol. This is so that it can discard
724 PC relative relocs if it doesn't need them when linking with
725 -Bsymbolic. We store the information in a field extending the regular
726 ELF linker hash table. */
727
728 /* This structure keeps track of the number of PC relative relocs we have
729 copied for a given symbol. */
730
731 struct elf_cris_pcrel_relocs_copied
732 {
733 /* Next section. */
734 struct elf_cris_pcrel_relocs_copied *next;
735
736 /* A section in dynobj. */
737 asection *section;
738
739 /* Number of relocs copied in this section. */
740 bfd_size_type count;
741
742 /* Example of reloc being copied, for message. */
743 enum elf_cris_reloc_type r_type;
744 };
745
746 /* CRIS ELF linker hash entry. */
747
748 struct elf_cris_link_hash_entry
749 {
750 struct elf_link_hash_entry root;
751
752 /* Number of PC relative relocs copied for this symbol. */
753 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
754
755 /* The GOTPLT references are CRIS-specific; the goal is to avoid having
756 both a general GOT and a PLT-specific GOT entry for the same symbol,
757 when it is referenced both as a function and as a function pointer.
758
759 Number of GOTPLT references for a function. */
760 bfd_signed_vma gotplt_refcount;
761
762 /* Actual GOTPLT index for this symbol, if applicable, or zero if not
763 (zero is never used as an index). FIXME: We should be able to fold
764 this with gotplt_refcount in a union, like the got and plt unions in
765 elf_link_hash_entry. */
766 bfd_size_type gotplt_offset;
767
768 /* The root.got.refcount is the sum of the regular reference counts
769 (this) and those members below. We have to keep a separate count
770 to track when we've found the first (or last) reference to a
771 regular got entry. The offset is in root.got.offset. */
772 bfd_signed_vma reg_got_refcount;
773
774 /* Similar to the above, the number of reloc references to this
775 symbols that need a R_CRIS_32_TPREL slot. The offset is in
776 root.got.offset, because this and .dtp_refcount can't validly
777 happen when there's also a regular GOT entry; that's invalid
778 input for which an error is emitted. */
779 bfd_signed_vma tprel_refcount;
780
781 /* Similar to the above, the number of reloc references to this
782 symbols that need a R_CRIS_DTP slot. The offset is in
783 root.got.offset; plus 4 if .tprel_refcount > 0. */
784 bfd_signed_vma dtp_refcount;
785 };
786
787 static bfd_boolean
788 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *,
789 void * );
790 static bfd_boolean
791 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *,
792 void *);
793
794 /* The local_got_refcounts and local_got_offsets are a multiple of
795 LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
796 refcount for GOT itself, see code), with the summary / group offset
797 for local symbols located at offset N, reference counts for
798 ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
799 relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
800 3*LSNUM. */
801
802 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
803 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
804 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
805 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
806
807 /* CRIS ELF linker hash table. */
808
809 struct elf_cris_link_hash_table
810 {
811 struct elf_link_hash_table root;
812
813 /* We can't use the PLT offset and calculate to get the GOTPLT offset,
814 since we try and avoid creating GOTPLT:s when there's already a GOT.
815 Instead, we keep and update the next available index here. */
816 bfd_size_type next_gotplt_entry;
817
818 /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
819 been seen for any input; if != 0, then the constant-offset
820 R_CRIS_DTPMOD is needed for this DSO/executable. This turns
821 negative at relocation, so that we don't need an extra flag for
822 when the reloc is output. */
823 bfd_signed_vma dtpmod_refcount;
824 };
825
826 /* Traverse a CRIS ELF linker hash table. */
827
828 #define elf_cris_link_hash_traverse(table, func, info) \
829 (elf_link_hash_traverse \
830 (&(table)->root, \
831 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
832 (info)))
833
834 /* Get the CRIS ELF linker hash table from a link_info structure. */
835
836 #define elf_cris_hash_table(p) \
837 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
838 == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL)
839
840 /* Get the CRIS ELF linker hash entry from a regular hash entry (the
841 "parent class"). The .root reference is just a simple type
842 check on the argument. */
843
844 #define elf_cris_hash_entry(p) \
845 ((struct elf_cris_link_hash_entry *) (&(p)->root))
846
847 /* Create an entry in a CRIS ELF linker hash table. */
848
849 static struct bfd_hash_entry *
850 elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry,
851 struct bfd_hash_table *table,
852 const char *string)
853 {
854 struct elf_cris_link_hash_entry *ret =
855 (struct elf_cris_link_hash_entry *) entry;
856
857 /* Allocate the structure if it has not already been allocated by a
858 subclass. */
859 if (ret == (struct elf_cris_link_hash_entry *) NULL)
860 ret = ((struct elf_cris_link_hash_entry *)
861 bfd_hash_allocate (table,
862 sizeof (struct elf_cris_link_hash_entry)));
863 if (ret == (struct elf_cris_link_hash_entry *) NULL)
864 return (struct bfd_hash_entry *) ret;
865
866 /* Call the allocation method of the superclass. */
867 ret = ((struct elf_cris_link_hash_entry *)
868 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
869 table, string));
870 if (ret != (struct elf_cris_link_hash_entry *) NULL)
871 {
872 ret->pcrel_relocs_copied = NULL;
873 ret->gotplt_refcount = 0;
874 ret->gotplt_offset = 0;
875 ret->dtp_refcount = 0;
876 ret->tprel_refcount = 0;
877 ret->reg_got_refcount = 0;
878 }
879
880 return (struct bfd_hash_entry *) ret;
881 }
882
883 /* Create a CRIS ELF linker hash table. */
884
885 static struct bfd_link_hash_table *
886 elf_cris_link_hash_table_create (bfd *abfd)
887 {
888 struct elf_cris_link_hash_table *ret;
889 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
890
891 ret = ((struct elf_cris_link_hash_table *) bfd_zmalloc (amt));
892 if (ret == (struct elf_cris_link_hash_table *) NULL)
893 return NULL;
894
895 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
896 elf_cris_link_hash_newfunc,
897 sizeof (struct elf_cris_link_hash_entry),
898 CRIS_ELF_DATA))
899 {
900 free (ret);
901 return NULL;
902 }
903
904 /* Initialize to skip over the first three entries in the gotplt; they
905 are used for run-time symbol evaluation. */
906 ret->next_gotplt_entry = 12;
907
908 return &ret->root.root;
909 }
910 \f
911 /* Perform a single relocation. By default we use the standard BFD
912 routines, with a few tweaks. */
913
914 static bfd_reloc_status_type
915 cris_final_link_relocate (reloc_howto_type * howto,
916 bfd * input_bfd,
917 asection * input_section,
918 bfd_byte * contents,
919 Elf_Internal_Rela * rel,
920 bfd_vma relocation)
921 {
922 bfd_reloc_status_type r;
923 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
924
925 /* PC-relative relocations are relative to the position *after*
926 the reloc. Note that for R_CRIS_8_PCREL the adjustment is
927 not a single byte, since PC must be 16-bit-aligned. */
928 switch (r_type)
929 {
930 /* Check that the 16-bit GOT relocs are positive. */
931 case R_CRIS_16_GOTPLT:
932 case R_CRIS_16_GOT:
933 if ((bfd_signed_vma) relocation < 0)
934 return bfd_reloc_overflow;
935 break;
936
937 case R_CRIS_32_PLT_PCREL:
938 case R_CRIS_32_PCREL:
939 relocation -= 2;
940 /* Fall through. */
941 case R_CRIS_8_PCREL:
942 case R_CRIS_16_PCREL:
943 relocation -= 2;
944 break;
945
946 default:
947 break;
948 }
949
950 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
951 contents, rel->r_offset,
952 relocation, rel->r_addend);
953 return r;
954 }
955 \f
956
957 /* The number of errors left before we stop outputting reloc-specific
958 explanatory messages. By coincidence, this works nicely together
959 with the default number of messages you'll get from LD about
960 "relocation truncated to fit" messages before you get an
961 "additional relocation overflows omitted from the output". */
962 static int additional_relocation_error_msg_count = 10;
963
964 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
965 copied, for further comments. */
966
967 static bfd_boolean
968 cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
969 struct bfd_link_info *info,
970 bfd *input_bfd,
971 asection *input_section,
972 bfd_byte *contents,
973 Elf_Internal_Rela *relocs,
974 Elf_Internal_Sym *local_syms,
975 asection **local_sections)
976 {
977 struct elf_cris_link_hash_table * htab;
978 bfd *dynobj;
979 Elf_Internal_Shdr *symtab_hdr;
980 struct elf_link_hash_entry **sym_hashes;
981 bfd_vma *local_got_offsets;
982 asection *sgot;
983 asection *splt;
984 asection *sreloc;
985 Elf_Internal_Rela *rel;
986 Elf_Internal_Rela *relend;
987 asection *srelgot;
988
989 htab = elf_cris_hash_table (info);
990 if (htab == NULL)
991 return FALSE;
992
993 dynobj = htab->root.dynobj;
994 local_got_offsets = elf_local_got_offsets (input_bfd);
995 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
996 sym_hashes = elf_sym_hashes (input_bfd);
997 relend = relocs + input_section->reloc_count;
998
999 sgot = NULL;
1000 splt = NULL;
1001 sreloc = NULL;
1002 srelgot = NULL;
1003
1004 if (dynobj != NULL)
1005 {
1006 splt = htab->root.splt;
1007 sgot = htab->root.sgot;
1008 }
1009
1010 for (rel = relocs; rel < relend; rel ++)
1011 {
1012 reloc_howto_type *howto;
1013 unsigned long r_symndx;
1014 Elf_Internal_Sym *sym;
1015 asection *sec;
1016 struct elf_link_hash_entry *h;
1017 bfd_vma relocation;
1018 bfd_reloc_status_type r;
1019 const char *symname = NULL;
1020 enum elf_cris_reloc_type r_type;
1021 bfd_boolean resolved_to_zero;
1022
1023 r_type = ELF32_R_TYPE (rel->r_info);
1024
1025 if ( r_type == R_CRIS_GNU_VTINHERIT
1026 || r_type == R_CRIS_GNU_VTENTRY)
1027 continue;
1028
1029 r_symndx = ELF32_R_SYM (rel->r_info);
1030 howto = cris_elf_howto_table + r_type;
1031 h = NULL;
1032 sym = NULL;
1033 sec = NULL;
1034
1035 if (r_symndx < symtab_hdr->sh_info)
1036 {
1037 sym = local_syms + r_symndx;
1038 sec = local_sections [r_symndx];
1039 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1040
1041 symname = (bfd_elf_string_from_elf_section
1042 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1043 if (symname == NULL)
1044 symname = bfd_section_name (input_bfd, sec);
1045 }
1046 else
1047 {
1048 bfd_boolean warned, ignored;
1049 bfd_boolean unresolved_reloc;
1050
1051 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1052 r_symndx, symtab_hdr, sym_hashes,
1053 h, sec, relocation,
1054 unresolved_reloc, warned, ignored);
1055
1056 symname = h->root.root.string;
1057
1058 if (unresolved_reloc
1059 /* Perhaps we should detect the cases that
1060 sec->output_section is expected to be NULL like i386 and
1061 m68k, but apparently (and according to elfxx-ia64.c) all
1062 valid cases are where the symbol is defined in a shared
1063 object which we link dynamically against. This includes
1064 PLT relocs for which we've created a PLT entry and other
1065 relocs for which we're prepared to create dynamic
1066 relocations.
1067
1068 For now, new situations cause us to just err when
1069 sec->output_offset is NULL but the object with the symbol
1070 is *not* dynamically linked against. Thus this will
1071 automatically remind us so we can see if there are other
1072 valid cases we need to revisit. */
1073 && (sec->owner->flags & DYNAMIC) != 0)
1074 relocation = 0;
1075
1076 else if (h->root.type == bfd_link_hash_defined
1077 || h->root.type == bfd_link_hash_defweak)
1078 {
1079 /* Here follow the cases where the relocation value must
1080 be zero (or when further handling is simplified when
1081 zero). I can't claim to understand the various
1082 conditions and they weren't described in the files
1083 where I copied them from (elf32-m68k.c and
1084 elf32-i386.c), but let's mention examples of where
1085 they happen. FIXME: Perhaps define and use a
1086 dynamic_symbol_p function like ia64.
1087
1088 - When creating a shared library, we can have an
1089 ordinary relocation for a symbol defined in a shared
1090 library (perhaps the one we create). We then make
1091 the relocation value zero, as the value seen now will
1092 be added into the relocation addend in this shared
1093 library, but must be handled only at dynamic-link
1094 time. FIXME: Not sure this example covers the
1095 h->elf_link_hash_flags test, though it's there in
1096 other targets. */
1097 if (bfd_link_pic (info)
1098 && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1)
1099 || !h->def_regular)
1100 && (input_section->flags & SEC_ALLOC) != 0
1101 && (r_type == R_CRIS_8
1102 || r_type == R_CRIS_16
1103 || r_type == R_CRIS_32
1104 || r_type == R_CRIS_8_PCREL
1105 || r_type == R_CRIS_16_PCREL
1106 || r_type == R_CRIS_32_PCREL))
1107 relocation = 0;
1108 else if (!bfd_link_relocatable (info) && unresolved_reloc
1109 && (_bfd_elf_section_offset (output_bfd, info,
1110 input_section,
1111 rel->r_offset)
1112 != (bfd_vma) -1))
1113 {
1114 _bfd_error_handler
1115 /* xgettext:c-format */
1116 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1117 input_bfd,
1118 input_section,
1119 cris_elf_howto_table[r_type].name,
1120 symname);
1121 bfd_set_error (bfd_error_bad_value);
1122 return FALSE;
1123 }
1124 }
1125 }
1126
1127 if (sec != NULL && discarded_section (sec))
1128 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1129 rel, 1, relend, howto, 0, contents);
1130
1131 if (bfd_link_relocatable (info))
1132 continue;
1133
1134 resolved_to_zero = (h != NULL
1135 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
1136
1137 switch (r_type)
1138 {
1139 case R_CRIS_16_GOTPLT:
1140 case R_CRIS_32_GOTPLT:
1141 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1142 but we require a PLT, and the PLT handling will take care of
1143 filling in the PLT-specific GOT entry. For the GOT offset,
1144 calculate it as we do when filling it in for the .got.plt
1145 section. If we don't have a PLT, punt to GOT handling. */
1146 if (h != NULL
1147 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1148 {
1149 asection *sgotplt = htab->root.sgotplt;
1150 bfd_vma got_offset;
1151
1152 BFD_ASSERT (h->dynindx != -1);
1153 BFD_ASSERT (sgotplt != NULL);
1154
1155 got_offset
1156 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1157
1158 relocation = got_offset;
1159 break;
1160 }
1161
1162 /* We didn't make a PLT entry for this symbol. Maybe everything is
1163 folded into the GOT. Other than folding, this happens when
1164 statically linking PIC code, or when using -Bsymbolic. Check
1165 that we instead have a GOT entry as done for us by
1166 elf_cris_adjust_dynamic_symbol, and drop through into the
1167 ordinary GOT cases. This must not happen for the
1168 executable, because any reference it does to a function
1169 that is satisfied by a DSO must generate a PLT. We assume
1170 these call-specific relocs don't address non-functions. */
1171 if (h != NULL
1172 && (h->got.offset == (bfd_vma) -1
1173 || (!bfd_link_pic (info)
1174 && !(h->def_regular
1175 || (!h->def_dynamic
1176 && h->root.type == bfd_link_hash_undefweak)))))
1177 {
1178 _bfd_error_handler
1179 ((h->got.offset == (bfd_vma) -1)
1180 /* xgettext:c-format */
1181 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1182 " against symbol `%s'")
1183 /* xgettext:c-format */
1184 : _("%B, section %A: No PLT for relocation %s"
1185 " against symbol `%s'"),
1186 input_bfd,
1187 input_section,
1188 cris_elf_howto_table[r_type].name,
1189 (symname != NULL && symname[0] != '\0'
1190 ? symname : _("[whose name is lost]")));
1191
1192 /* FIXME: Perhaps blaming input is not the right thing to
1193 do; this is probably an internal error. But it is true
1194 that we didn't like that particular input. */
1195 bfd_set_error (bfd_error_bad_value);
1196 return FALSE;
1197 }
1198 /* Fall through. */
1199
1200 /* The size of the actual relocation is not used here; we only
1201 fill in the GOT table here. */
1202 case R_CRIS_16_GOT:
1203 case R_CRIS_32_GOT:
1204 {
1205 bfd_vma off;
1206
1207 /* Note that despite using RELA relocations, the .got contents
1208 is always filled in with the link-relative relocation
1209 value; the addend. */
1210
1211 if (h != NULL)
1212 {
1213 off = h->got.offset;
1214 BFD_ASSERT (off != (bfd_vma) -1);
1215
1216 if (!elf_hash_table (info)->dynamic_sections_created
1217 || (! bfd_link_pic (info)
1218 && (h->def_regular
1219 || h->type == STT_FUNC
1220 || h->needs_plt))
1221 || (bfd_link_pic (info)
1222 && (SYMBOLIC_BIND (info, h) || h->dynindx == -1)
1223 && h->def_regular))
1224 {
1225 /* This wasn't checked above for ! bfd_link_pic (info), but
1226 must hold there if we get here; the symbol must
1227 be defined in the regular program or be undefweak
1228 or be a function or otherwise need a PLT. */
1229 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1230 || bfd_link_pic (info)
1231 || h->def_regular
1232 || h->type == STT_FUNC
1233 || h->needs_plt
1234 || h->root.type == bfd_link_hash_undefweak);
1235
1236 /* This is actually a static link, or it is a
1237 -Bsymbolic link and the symbol is defined locally,
1238 or is undefweak, or the symbol was forced to be
1239 local because of a version file, or we're not
1240 creating a dynamic object. We must initialize this
1241 entry in the global offset table. Since the offset
1242 must always be a multiple of 4, we use the least
1243 significant bit to record whether we have
1244 initialized it already.
1245
1246 If this GOT entry should be runtime-initialized, we
1247 will create a .rela.got relocation entry to
1248 initialize the value. This is done in the
1249 finish_dynamic_symbol routine. */
1250 if ((off & 1) != 0)
1251 off &= ~1;
1252 else
1253 {
1254 bfd_put_32 (output_bfd, relocation,
1255 sgot->contents + off);
1256 h->got.offset |= 1;
1257 }
1258 }
1259 }
1260 else
1261 {
1262 BFD_ASSERT (local_got_offsets != NULL
1263 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1264
1265 off = local_got_offsets[r_symndx];
1266
1267 /* The offset must always be a multiple of 4. We use
1268 the least significant bit to record whether we have
1269 already generated the necessary reloc. */
1270 if ((off & 1) != 0)
1271 off &= ~1;
1272 else
1273 {
1274 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1275
1276 if (bfd_link_pic (info))
1277 {
1278 Elf_Internal_Rela outrel;
1279 bfd_byte *loc;
1280
1281 srelgot = htab->root.srelgot;
1282 BFD_ASSERT (srelgot != NULL);
1283
1284 outrel.r_offset = (sgot->output_section->vma
1285 + sgot->output_offset
1286 + off);
1287 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1288 outrel.r_addend = relocation;
1289 loc = srelgot->contents;
1290 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1291 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1292 }
1293
1294 local_got_offsets[r_symndx] |= 1;
1295 }
1296 }
1297
1298 relocation = sgot->output_offset + off;
1299 if (rel->r_addend != 0)
1300 {
1301 /* We can't do anything for a relocation which is against
1302 a symbol *plus offset*. GOT holds relocations for
1303 symbols. Make this an error; the compiler isn't
1304 allowed to pass us these kinds of things. */
1305 if (h == NULL)
1306 _bfd_error_handler
1307 /* xgettext:c-format */
1308 (_("%B, section %A: relocation %s with non-zero addend %Ld"
1309 " against local symbol"),
1310 input_bfd,
1311 input_section,
1312 cris_elf_howto_table[r_type].name,
1313 rel->r_addend);
1314 else
1315 _bfd_error_handler
1316 /* xgettext:c-format */
1317 (_("%B, section %A: relocation %s with non-zero addend %Ld"
1318 " against symbol `%s'"),
1319 input_bfd,
1320 input_section,
1321 cris_elf_howto_table[r_type].name,
1322 rel->r_addend,
1323 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1324
1325 bfd_set_error (bfd_error_bad_value);
1326 return FALSE;
1327 }
1328 }
1329 break;
1330
1331 case R_CRIS_32_GOTREL:
1332 /* This relocation must only be performed against local symbols.
1333 It's also ok when we link a program and the symbol is either
1334 defined in an ordinary (non-DSO) object or is undefined weak. */
1335 if (h != NULL
1336 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1337 && !(!bfd_link_pic (info)
1338 && (h->def_regular
1339 || (!h->def_dynamic
1340 && h->root.type == bfd_link_hash_undefweak))))
1341 {
1342 _bfd_error_handler
1343 /* xgettext:c-format */
1344 (_("%B, section %A: relocation %s is"
1345 " not allowed for global symbol: `%s'"),
1346 input_bfd,
1347 input_section,
1348 cris_elf_howto_table[r_type].name,
1349 symname);
1350 bfd_set_error (bfd_error_bad_value);
1351 return FALSE;
1352 }
1353
1354 /* This can happen if we get a link error with the input ELF
1355 variant mismatching the output variant. Emit an error so
1356 it's noticed if it happens elsewhere. */
1357 if (sgot == NULL)
1358 {
1359 _bfd_error_handler
1360 /* xgettext:c-format */
1361 (_("%B, section %A: relocation %s with no GOT created"),
1362 input_bfd,
1363 input_section,
1364 cris_elf_howto_table[r_type].name);
1365 bfd_set_error (bfd_error_bad_value);
1366 return FALSE;
1367 }
1368
1369 /* This relocation is like a PC-relative one, except the
1370 reference point is the location of GOT. Note that
1371 sgot->output_offset is not involved in this calculation. We
1372 always want the start of entire .got section, not the
1373 position after the reserved header. */
1374 relocation -= sgot->output_section->vma;
1375 break;
1376
1377 case R_CRIS_32_PLT_PCREL:
1378 /* Relocation is to the entry for this symbol in the
1379 procedure linkage table. */
1380
1381 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1382 without using the procedure linkage table. */
1383 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1384 break;
1385
1386 if (h->plt.offset == (bfd_vma) -1
1387 || splt == NULL)
1388 {
1389 /* We didn't make a PLT entry for this symbol. This
1390 happens when statically linking PIC code, or when
1391 using -Bsymbolic. */
1392 break;
1393 }
1394
1395 relocation = (splt->output_section->vma
1396 + splt->output_offset
1397 + h->plt.offset);
1398 break;
1399
1400 case R_CRIS_32_PLT_GOTREL:
1401 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1402 start of the .got section. See also comment at
1403 R_CRIS_32_GOT. */
1404 relocation -= sgot->output_section->vma;
1405
1406 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1407 without using the procedure linkage table. */
1408 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1409 break;
1410
1411 if (h->plt.offset == (bfd_vma) -1
1412 || splt == NULL)
1413 {
1414 /* We didn't make a PLT entry for this symbol. This
1415 happens when statically linking PIC code, or when
1416 using -Bsymbolic. */
1417 break;
1418 }
1419
1420 relocation = (splt->output_section->vma
1421 + splt->output_offset
1422 + h->plt.offset
1423 - sgot->output_section->vma);
1424 break;
1425
1426 case R_CRIS_8_PCREL:
1427 case R_CRIS_16_PCREL:
1428 case R_CRIS_32_PCREL:
1429 /* If the symbol was local, we need no shlib-specific handling. */
1430 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1431 || h->dynindx == -1)
1432 break;
1433
1434 /* Fall through. */
1435 case R_CRIS_8:
1436 case R_CRIS_16:
1437 case R_CRIS_32:
1438 if (bfd_link_pic (info)
1439 && !resolved_to_zero
1440 && r_symndx != STN_UNDEF
1441 && (input_section->flags & SEC_ALLOC) != 0
1442 && ((r_type != R_CRIS_8_PCREL
1443 && r_type != R_CRIS_16_PCREL
1444 && r_type != R_CRIS_32_PCREL)
1445 || (!SYMBOLIC_BIND (info, h)
1446 || (h != NULL && !h->def_regular))))
1447 {
1448 Elf_Internal_Rela outrel;
1449 bfd_byte *loc;
1450 bfd_boolean skip, relocate;
1451
1452 /* When generating a shared object, these relocations
1453 are copied into the output file to be resolved at run
1454 time. */
1455
1456 if (sreloc == NULL)
1457 {
1458 sreloc = _bfd_elf_get_dynamic_reloc_section
1459 (dynobj, input_section, /*rela?*/ TRUE);
1460 /* The section should have been created in cris_elf_check_relocs,
1461 but that function will not be called for objects which fail in
1462 cris_elf_merge_private_bfd_data. */
1463 if (sreloc == NULL)
1464 {
1465 bfd_set_error (bfd_error_bad_value);
1466 return FALSE;
1467 }
1468 }
1469
1470 skip = FALSE;
1471 relocate = FALSE;
1472
1473 outrel.r_offset =
1474 _bfd_elf_section_offset (output_bfd, info, input_section,
1475 rel->r_offset);
1476 if (outrel.r_offset == (bfd_vma) -1)
1477 skip = TRUE;
1478 else if (outrel.r_offset == (bfd_vma) -2
1479 /* For now, undefined weak symbols with non-default
1480 visibility (yielding 0), like exception info for
1481 discarded sections, will get a R_CRIS_NONE
1482 relocation rather than no relocation, because we
1483 notice too late that the symbol doesn't need a
1484 relocation. */
1485 || (h != NULL
1486 && h->root.type == bfd_link_hash_undefweak
1487 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1488 skip = TRUE, relocate = TRUE;
1489 outrel.r_offset += (input_section->output_section->vma
1490 + input_section->output_offset);
1491
1492 if (skip)
1493 memset (&outrel, 0, sizeof outrel);
1494 /* h->dynindx may be -1 if the symbol was marked to
1495 become local. */
1496 else if (h != NULL
1497 && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1)
1498 || !h->def_regular))
1499 {
1500 BFD_ASSERT (h->dynindx != -1);
1501 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1502 outrel.r_addend = relocation + rel->r_addend;
1503 }
1504 else
1505 {
1506 outrel.r_addend = relocation + rel->r_addend;
1507
1508 if (r_type == R_CRIS_32)
1509 {
1510 relocate = TRUE;
1511 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1512 }
1513 else
1514 {
1515 long indx;
1516
1517 if (bfd_is_abs_section (sec))
1518 indx = 0;
1519 else if (sec == NULL || sec->owner == NULL)
1520 {
1521 bfd_set_error (bfd_error_bad_value);
1522 return FALSE;
1523 }
1524 else
1525 {
1526 asection *osec;
1527
1528 /* We are turning this relocation into one
1529 against a section symbol. It would be
1530 proper to subtract the symbol's value,
1531 osec->vma, from the emitted reloc addend,
1532 but ld.so expects buggy relocs. */
1533 osec = sec->output_section;
1534 indx = elf_section_data (osec)->dynindx;
1535 if (indx == 0)
1536 {
1537 osec = htab->root.text_index_section;
1538 indx = elf_section_data (osec)->dynindx;
1539 }
1540 BFD_ASSERT (indx != 0);
1541 }
1542
1543 outrel.r_info = ELF32_R_INFO (indx, r_type);
1544 }
1545 }
1546
1547 loc = sreloc->contents;
1548 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1549 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1550
1551 /* This reloc will be computed at runtime, so there's no
1552 need to do anything now, except for R_CRIS_32 relocations
1553 that have been turned into R_CRIS_RELATIVE. */
1554 if (!relocate)
1555 continue;
1556 }
1557
1558 break;
1559
1560 case R_CRIS_16_DTPREL:
1561 case R_CRIS_32_DTPREL:
1562 /* This relocation must only be performed against local
1563 symbols, or to sections that are not loadable. It's also
1564 ok when we link a program and the symbol is defined in an
1565 ordinary (non-DSO) object (if it's undefined there, we've
1566 already seen an error). */
1567 if (h != NULL
1568 && (input_section->flags & SEC_ALLOC) != 0
1569 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1570 && (bfd_link_pic (info)
1571 || (!h->def_regular
1572 && h->root.type != bfd_link_hash_undefined)))
1573 {
1574 _bfd_error_handler
1575 ((h->root.type == bfd_link_hash_undefined)
1576 /* We shouldn't get here for GCC-emitted code. */
1577 /* xgettext:c-format */
1578 ? _("%B, section %A: relocation %s has an undefined"
1579 " reference to `%s', perhaps a declaration mixup?")
1580 /* xgettext:c-format */
1581 : _("%B, section %A: relocation %s is"
1582 " not allowed for `%s', a global symbol with default"
1583 " visibility, perhaps a declaration mixup?"),
1584 input_bfd,
1585 input_section,
1586 cris_elf_howto_table[r_type].name,
1587 symname != NULL && symname[0] != '\0'
1588 ? symname : _("[whose name is lost]"));
1589 bfd_set_error (bfd_error_bad_value);
1590 return FALSE;
1591 }
1592
1593 BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1594 || htab->dtpmod_refcount != 0);
1595
1596 /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1597 already done so. Note that we do this in .got.plt, not
1598 in .got, as .got.plt contains the first part, still the
1599 reloc is against .got, because the linker script directs
1600 (is required to direct) them both into .got. */
1601 if (htab->dtpmod_refcount > 0
1602 && (input_section->flags & SEC_ALLOC) != 0)
1603 {
1604 asection *sgotplt = htab->root.sgotplt;
1605 BFD_ASSERT (sgotplt != NULL);
1606
1607 if (bfd_link_pic (info))
1608 {
1609 Elf_Internal_Rela outrel;
1610 bfd_byte *loc;
1611
1612 srelgot = htab->root.srelgot;
1613 BFD_ASSERT (srelgot != NULL);
1614 loc = srelgot->contents;
1615 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1616
1617 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1618 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1619 outrel.r_offset = (sgotplt->output_section->vma
1620 + sgotplt->output_offset
1621 + 12);
1622 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1623 outrel.r_addend = 0;
1624 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1625 }
1626 else
1627 {
1628 /* For an executable, the GOT entry contents is known. */
1629 bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1630 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1631 }
1632
1633 /* Reverse the sign to mark that we've emitted the
1634 required GOT entry. */
1635 htab->dtpmod_refcount = - htab->dtpmod_refcount;
1636 }
1637
1638 /* The relocation is the offset from the start of the module
1639 TLS block to the (local) symbol. */
1640 relocation -= elf_hash_table (info)->tls_sec == NULL
1641 ? 0 : elf_hash_table (info)->tls_sec->vma;
1642 break;
1643
1644 case R_CRIS_32_GD:
1645 if (bfd_link_pic (info))
1646 {
1647 bfd_set_error (bfd_error_invalid_operation);
1648
1649 /* We've already informed in cris_elf_check_relocs that
1650 this is an error. */
1651 return FALSE;
1652 }
1653 /* Fall through. */
1654
1655 case R_CRIS_16_GOT_GD:
1656 case R_CRIS_32_GOT_GD:
1657 if (rel->r_addend != 0)
1658 {
1659 /* We can't do anything for a relocation which is against a
1660 symbol *plus offset*. The GOT holds relocations for
1661 symbols. Make this an error; the compiler isn't allowed
1662 to pass us these kinds of things. */
1663 _bfd_error_handler
1664 /* xgettext:c-format */
1665 (_("%B, section %A: relocation %s with non-zero addend %Ld"
1666 " against symbol `%s'"),
1667 input_bfd,
1668 input_section,
1669 cris_elf_howto_table[r_type].name,
1670 rel->r_addend,
1671 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1672
1673 bfd_set_error (bfd_error_bad_value);
1674 return FALSE;
1675 }
1676
1677 if (!bfd_link_pic (info)
1678 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1679 {
1680 /* Known contents of the GOT. */
1681 bfd_vma off;
1682
1683 /* The symbol is defined in the program, so just write
1684 (1, known_tpoffset) into the GOT. */
1685 relocation -= elf_hash_table (info)->tls_sec->vma;
1686
1687 if (h != NULL)
1688 {
1689 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1690 ? h->got.offset + 4 : h->got.offset;
1691 }
1692 else
1693 {
1694 off = local_got_offsets[r_symndx];
1695 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1696 off += 4;
1697 }
1698
1699 /* We use bit 1 of the offset as a flag for GOT entry with
1700 the R_CRIS_DTP reloc, setting it when we've emitted the
1701 GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL
1702 relocs. */
1703 if ((off & 2) == 0)
1704 {
1705 off &= ~3;
1706
1707 if (h != NULL)
1708 h->got.offset |= 2;
1709 else
1710 local_got_offsets[r_symndx] |= 2;
1711
1712 bfd_put_32 (output_bfd, 1, sgot->contents + off);
1713 bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1714 }
1715 else
1716 off &= ~3;
1717
1718 relocation = sgot->output_offset + off
1719 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1720 }
1721 else
1722 {
1723 /* Not all parts of the GOT entry are known; emit a real
1724 relocation. */
1725 bfd_vma off;
1726
1727 if (h != NULL)
1728 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1729 ? h->got.offset + 4 : h->got.offset;
1730 else
1731 {
1732 off = local_got_offsets[r_symndx];
1733 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1734 off += 4;
1735 }
1736
1737 /* See above re bit 1 and bit 0 usage. */
1738 if ((off & 2) == 0)
1739 {
1740 Elf_Internal_Rela outrel;
1741 bfd_byte *loc;
1742
1743 off &= ~3;
1744
1745 if (h != NULL)
1746 h->got.offset |= 2;
1747 else
1748 local_got_offsets[r_symndx] |= 2;
1749
1750 /* Clear the target contents of the GOT (just as a
1751 gesture; it's already cleared on allocation): this
1752 relocation is not like the other dynrelocs. */
1753 bfd_put_32 (output_bfd, 0, sgot->contents + off);
1754 bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1755
1756 srelgot = htab->root.srelgot;
1757 BFD_ASSERT (srelgot != NULL);
1758
1759 if (h != NULL && h->dynindx != -1)
1760 {
1761 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1762 relocation = 0;
1763 }
1764 else
1765 {
1766 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1767
1768 /* NULL if we had an error. */
1769 relocation -= elf_hash_table (info)->tls_sec == NULL
1770 ? 0 : elf_hash_table (info)->tls_sec->vma;
1771 }
1772
1773 outrel.r_offset = (sgot->output_section->vma
1774 + sgot->output_offset
1775 + off);
1776 outrel.r_addend = relocation;
1777 loc = srelgot->contents;
1778 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1779
1780 /* NULL if we had an error. */
1781 if (srelgot->contents != NULL)
1782 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1783 }
1784 else
1785 off &= ~3;
1786
1787 relocation = sgot->output_offset + off
1788 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1789 }
1790
1791 /* The GOT-relative offset to the GOT entry is the
1792 relocation, or for R_CRIS_32_GD, the actual address of
1793 the GOT entry. */
1794 break;
1795
1796 case R_CRIS_32_IE:
1797 if (bfd_link_pic (info))
1798 {
1799 bfd_set_error (bfd_error_invalid_operation);
1800
1801 /* We've already informed in cris_elf_check_relocs that
1802 this is an error. */
1803 return FALSE;
1804 }
1805 /* Fall through. */
1806
1807 case R_CRIS_32_GOT_TPREL:
1808 case R_CRIS_16_GOT_TPREL:
1809 if (rel->r_addend != 0)
1810 {
1811 /* We can't do anything for a relocation which is
1812 against a symbol *plus offset*. GOT holds
1813 relocations for symbols. Make this an error; the
1814 compiler isn't allowed to pass us these kinds of
1815 things. */
1816 _bfd_error_handler
1817 /* xgettext:c-format */
1818 (_("%B, section %A: relocation %s with non-zero addend %Ld"
1819 " against symbol `%s'"),
1820 input_bfd,
1821 input_section,
1822 cris_elf_howto_table[r_type].name,
1823 rel->r_addend,
1824 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1825 bfd_set_error (bfd_error_bad_value);
1826 return FALSE;
1827 }
1828
1829 if (!bfd_link_pic (info)
1830 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1831 {
1832 /* Known contents of the GOT. */
1833 bfd_vma off;
1834
1835 /* The symbol is defined in the program, so just write
1836 the -prog_tls_size+known_tpoffset into the GOT. */
1837 relocation -= elf_hash_table (info)->tls_sec->vma;
1838 relocation -= elf_hash_table (info)->tls_size;
1839
1840 if (h != NULL)
1841 off = h->got.offset;
1842 else
1843 off = local_got_offsets[r_symndx];
1844
1845 /* Bit 0 is used to mark whether we've emitted the required
1846 entry (and if needed R_CRIS_32_TPREL reloc). Bit 1
1847 is used similarly for R_CRIS_DTP, see above. */
1848 if ((off & 1) == 0)
1849 {
1850 off &= ~3;
1851
1852 if (h != NULL)
1853 h->got.offset |= 1;
1854 else
1855 local_got_offsets[r_symndx] |= 1;
1856
1857 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1858 }
1859 else
1860 off &= ~3;
1861
1862 relocation = sgot->output_offset + off
1863 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1864 }
1865 else
1866 {
1867 /* Emit a real relocation. */
1868 bfd_vma off;
1869
1870 if (h != NULL)
1871 off = h->got.offset;
1872 else
1873 off = local_got_offsets[r_symndx];
1874
1875 /* See above re usage of bit 0 and 1. */
1876 if ((off & 1) == 0)
1877 {
1878 Elf_Internal_Rela outrel;
1879 bfd_byte *loc;
1880
1881 off &= ~3;
1882
1883 if (h != NULL)
1884 h->got.offset |= 1;
1885 else
1886 local_got_offsets[r_symndx] |= 1;
1887
1888 srelgot = htab->root.srelgot;
1889 BFD_ASSERT (srelgot != NULL);
1890
1891 if (h != NULL && h->dynindx != -1)
1892 {
1893 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1894 relocation = 0;
1895 }
1896 else
1897 {
1898 outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1899
1900 /* NULL if we had an error. */
1901 relocation -= elf_hash_table (info)->tls_sec == NULL
1902 ? 0 : elf_hash_table (info)->tls_sec->vma;
1903 }
1904
1905 /* Just "define" the initial contents in some
1906 semi-logical way. */
1907 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1908
1909 outrel.r_offset = (sgot->output_section->vma
1910 + sgot->output_offset
1911 + off);
1912 outrel.r_addend = relocation;
1913 loc = srelgot->contents;
1914 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1915 /* NULL if we had an error. */
1916 if (srelgot->contents != NULL)
1917 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1918 }
1919 else
1920 off &= ~3;
1921
1922 relocation = sgot->output_offset + off
1923 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1924 }
1925
1926 /* The GOT-relative offset to the GOT entry is the relocation,
1927 or for R_CRIS_32_GD, the actual address of the GOT entry. */
1928 break;
1929
1930 case R_CRIS_16_TPREL:
1931 case R_CRIS_32_TPREL:
1932 /* This relocation must only be performed against symbols
1933 defined in an ordinary (non-DSO) object. */
1934 if (bfd_link_pic (info))
1935 {
1936 bfd_set_error (bfd_error_invalid_operation);
1937
1938 /* We've already informed in cris_elf_check_relocs that
1939 this is an error. */
1940 return FALSE;
1941 }
1942
1943 if (h != NULL
1944 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1945 && !(h->def_regular || ELF_COMMON_DEF_P (h))
1946 /* If it's undefined, then an error message has already
1947 been emitted. */
1948 && h->root.type != bfd_link_hash_undefined)
1949 {
1950 _bfd_error_handler
1951 /* xgettext:c-format */
1952 (_("%B, section %A: relocation %s is"
1953 " not allowed for symbol: `%s'"
1954 " which is defined outside the program,"
1955 " perhaps a declaration mixup?"),
1956 input_bfd,
1957 input_section,
1958 cris_elf_howto_table[r_type].name,
1959 symname);
1960 bfd_set_error (bfd_error_bad_value);
1961 return FALSE;
1962 }
1963
1964 /* NULL if we had an error. */
1965 relocation -= elf_hash_table (info)->tls_sec == NULL
1966 ? 0
1967 : (elf_hash_table (info)->tls_sec->vma
1968 + elf_hash_table (info)->tls_size);
1969
1970 /* The TLS-relative offset is the relocation. */
1971 break;
1972
1973 default:
1974 BFD_FAIL ();
1975 return FALSE;
1976 }
1977
1978 r = cris_final_link_relocate (howto, input_bfd, input_section,
1979 contents, rel, relocation);
1980
1981 if (r != bfd_reloc_ok)
1982 {
1983 const char * msg = (const char *) NULL;
1984
1985 switch (r)
1986 {
1987 case bfd_reloc_overflow:
1988 (*info->callbacks->reloc_overflow)
1989 (info, (h ? &h->root : NULL), symname, howto->name,
1990 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1991 if (additional_relocation_error_msg_count > 0)
1992 {
1993 additional_relocation_error_msg_count--;
1994 switch (r_type)
1995 {
1996 case R_CRIS_16_GOTPLT:
1997 case R_CRIS_16_GOT:
1998
1999 /* Not just TLS is involved here, so we make
2000 generation and message depend on -fPIC/-fpic
2001 only. */
2002 case R_CRIS_16_GOT_TPREL:
2003 case R_CRIS_16_GOT_GD:
2004 _bfd_error_handler
2005 (_("(too many global variables for -fpic:"
2006 " recompile with -fPIC)"));
2007 break;
2008
2009 case R_CRIS_16_TPREL:
2010 case R_CRIS_16_DTPREL:
2011 _bfd_error_handler
2012 (_("(thread-local data too big for -fpic or"
2013 " -msmall-tls: recompile with -fPIC or"
2014 " -mno-small-tls)"));
2015 break;
2016
2017 /* No known cause for overflow for other relocs. */
2018 default:
2019 break;
2020 }
2021 }
2022 break;
2023
2024 case bfd_reloc_undefined:
2025 (*info->callbacks->undefined_symbol)
2026 (info, symname, input_bfd, input_section, rel->r_offset, TRUE);
2027 break;
2028
2029 case bfd_reloc_outofrange:
2030 msg = _("internal error: out of range error");
2031 break;
2032
2033 case bfd_reloc_notsupported:
2034 msg = _("internal error: unsupported relocation error");
2035 break;
2036
2037 case bfd_reloc_dangerous:
2038 msg = _("internal error: dangerous relocation");
2039 break;
2040
2041 default:
2042 msg = _("internal error: unknown error");
2043 break;
2044 }
2045
2046 if (msg)
2047 (*info->callbacks->warning) (info, msg, symname, input_bfd,
2048 input_section, rel->r_offset);
2049 }
2050 }
2051
2052 return TRUE;
2053 }
2054 \f
2055 /* Finish up dynamic symbol handling. We set the contents of various
2056 dynamic sections here. */
2057
2058 static bfd_boolean
2059 elf_cris_finish_dynamic_symbol (bfd *output_bfd,
2060 struct bfd_link_info *info,
2061 struct elf_link_hash_entry *h,
2062 Elf_Internal_Sym *sym)
2063 {
2064 struct elf_cris_link_hash_table * htab;
2065
2066 /* Where in the plt entry to put values. */
2067 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2068
2069 /* What offset to add to the distance to the first PLT entry for the
2070 value at plt_off3. */
2071 int plt_off3_value_bias = 4;
2072
2073 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2074 for PIC and non-PIC for v32 and pre-v32). */
2075 int plt_stub_offset = 8;
2076 int plt_entry_size = PLT_ENTRY_SIZE;
2077 const bfd_byte *plt_entry = elf_cris_plt_entry;
2078 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2079
2080 htab = elf_cris_hash_table (info);
2081 if (htab == NULL)
2082 return FALSE;
2083
2084 /* Adjust the various PLT entry offsets. */
2085 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2086 {
2087 plt_off2 = 14;
2088 plt_off3 = 20;
2089 plt_off3_value_bias = -2;
2090 plt_stub_offset = 12;
2091 plt_entry_size = PLT_ENTRY_SIZE_V32;
2092 plt_entry = elf_cris_plt_entry_v32;
2093 plt_pic_entry = elf_cris_pic_plt_entry_v32;
2094 }
2095
2096 if (h->plt.offset != (bfd_vma) -1)
2097 {
2098 asection *splt;
2099 asection *sgotplt;
2100 asection *srela;
2101 bfd_vma got_base;
2102
2103 bfd_vma gotplt_offset
2104 = elf_cris_hash_entry (h)->gotplt_offset;
2105 Elf_Internal_Rela rela;
2106 bfd_byte *loc;
2107 bfd_boolean has_gotplt = gotplt_offset != 0;
2108
2109 /* Get the index in the .rela.plt relocations for the .got.plt
2110 entry that corresponds to this symbol.
2111 We have to count backwards here, and the result is only valid
2112 as an index into .rela.plt. We also have to undo the effect
2113 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2114 .got.plt) for which gotplt_offset is adjusted, because while
2115 that entry goes into .got.plt, its relocation goes into
2116 .rela.got, not .rela.plt. (It's not PLT-specific; not to be
2117 processed as part of the runtime lazy .rela.plt relocation).
2118 FIXME: There be literal constants here... */
2119 bfd_vma rela_plt_index
2120 = (htab->dtpmod_refcount != 0
2121 ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2122
2123 /* Get the offset into the .got table of the entry that corresponds
2124 to this function. Note that we embed knowledge that "incoming"
2125 .got goes after .got.plt in the output without padding (pointer
2126 aligned). However, that knowledge is present in several other
2127 places too. */
2128 bfd_vma got_offset
2129 = (has_gotplt
2130 ? gotplt_offset
2131 : h->got.offset + htab->next_gotplt_entry);
2132
2133 /* This symbol has an entry in the procedure linkage table. Set it
2134 up. */
2135
2136 BFD_ASSERT (h->dynindx != -1);
2137
2138 splt = htab->root.splt;
2139 sgotplt = htab->root.sgotplt;
2140 srela = htab->root.srelplt;
2141 BFD_ASSERT (splt != NULL && sgotplt != NULL
2142 && (! has_gotplt || srela != NULL));
2143
2144 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2145
2146 /* Fill in the entry in the procedure linkage table. */
2147 if (! bfd_link_pic (info))
2148 {
2149 memcpy (splt->contents + h->plt.offset, plt_entry,
2150 plt_entry_size);
2151
2152 /* We need to enter the absolute address of the GOT entry here. */
2153 bfd_put_32 (output_bfd, got_base + got_offset,
2154 splt->contents + h->plt.offset + plt_off1);
2155 }
2156 else
2157 {
2158 memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2159 plt_entry_size);
2160 bfd_put_32 (output_bfd, got_offset,
2161 splt->contents + h->plt.offset + plt_off1);
2162 }
2163
2164 /* Fill in the plt entry and make a relocation, if this is a "real"
2165 PLT entry. */
2166 if (has_gotplt)
2167 {
2168 /* Fill in the offset to the reloc table. */
2169 bfd_put_32 (output_bfd,
2170 rela_plt_index * sizeof (Elf32_External_Rela),
2171 splt->contents + h->plt.offset + plt_off2);
2172
2173 /* Fill in the offset to the first PLT entry, where to "jump". */
2174 bfd_put_32 (output_bfd,
2175 - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2176 splt->contents + h->plt.offset + plt_off3);
2177
2178 /* Fill in the entry in the global offset table with the address of
2179 the relocating stub. */
2180 bfd_put_32 (output_bfd,
2181 (splt->output_section->vma
2182 + splt->output_offset
2183 + h->plt.offset
2184 + plt_stub_offset),
2185 sgotplt->contents + got_offset);
2186
2187 /* Fill in the entry in the .rela.plt section. */
2188 rela.r_offset = (sgotplt->output_section->vma
2189 + sgotplt->output_offset
2190 + got_offset);
2191 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2192 rela.r_addend = 0;
2193 loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2194 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2195 }
2196
2197 if (!h->def_regular)
2198 {
2199 /* Mark the symbol as undefined, rather than as defined in
2200 the .plt section. Leave the value alone. */
2201 sym->st_shndx = SHN_UNDEF;
2202
2203 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
2204 know whether resetting the value is significant; if it really
2205 is, rather than a quirk or bug in the sparc port, then I
2206 believe we'd see this elsewhere. */
2207 /* If the symbol is weak, we do need to clear the value.
2208 Otherwise, the PLT entry would provide a definition for
2209 the symbol even if the symbol wasn't defined anywhere,
2210 and so the symbol would never be NULL. */
2211 if (!h->ref_regular_nonweak)
2212 sym->st_value = 0;
2213 }
2214 }
2215
2216 /* For an ordinary program, we emit .got relocs only for symbols that
2217 are in the dynamic-symbols table and are either defined by the
2218 program or are undefined weak symbols, or are function symbols
2219 where we do not output a PLT: the PLT reloc was output above and all
2220 references to the function symbol are redirected to the PLT. */
2221 if (h->got.offset != (bfd_vma) -1
2222 && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2223 && (bfd_link_pic (info)
2224 || (h->dynindx != -1
2225 && h->plt.offset == (bfd_vma) -1
2226 && !h->def_regular
2227 && h->root.type != bfd_link_hash_undefweak)))
2228 {
2229 asection *sgot;
2230 asection *srela;
2231 Elf_Internal_Rela rela;
2232 bfd_byte *loc;
2233 bfd_byte *where;
2234
2235 /* This symbol has an entry in the global offset table. Set it up. */
2236
2237 sgot = htab->root.sgot;
2238 srela = htab->root.srelgot;
2239 BFD_ASSERT (sgot != NULL && srela != NULL);
2240
2241 rela.r_offset = (sgot->output_section->vma
2242 + sgot->output_offset
2243 + (h->got.offset &~ (bfd_vma) 1));
2244
2245 /* If this is a static link, or it is a -Bsymbolic link and the
2246 symbol is defined locally or was forced to be local because
2247 of a version file, we just want to emit a RELATIVE reloc.
2248 The entry in the global offset table will already have been
2249 initialized in the relocate_section function. */
2250 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2251 if (! elf_hash_table (info)->dynamic_sections_created
2252 || (bfd_link_pic (info)
2253 && (SYMBOLIC_BIND (info, h) || h->dynindx == -1)
2254 && h->def_regular))
2255 {
2256 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2257 rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2258 }
2259 else
2260 {
2261 bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2262 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2263 rela.r_addend = 0;
2264 }
2265
2266 loc = srela->contents;
2267 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2268 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2269 }
2270
2271 if (h->needs_copy)
2272 {
2273 asection *s;
2274 Elf_Internal_Rela rela;
2275 bfd_byte *loc;
2276
2277 /* This symbol needs a copy reloc. Set it up. */
2278
2279 BFD_ASSERT (h->dynindx != -1
2280 && (h->root.type == bfd_link_hash_defined
2281 || h->root.type == bfd_link_hash_defweak));
2282
2283 if (h->root.u.def.section == htab->root.sdynrelro)
2284 s = htab->root.sreldynrelro;
2285 else
2286 s = htab->root.srelbss;
2287
2288 rela.r_offset = (h->root.u.def.value
2289 + h->root.u.def.section->output_section->vma
2290 + h->root.u.def.section->output_offset);
2291 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2292 rela.r_addend = 0;
2293 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2294 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2295 }
2296
2297 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2298 if (h == elf_hash_table (info)->hdynamic
2299 || h == elf_hash_table (info)->hgot)
2300 sym->st_shndx = SHN_ABS;
2301
2302 return TRUE;
2303 }
2304 \f
2305 /* Finish up the dynamic sections. Do *not* emit relocs here, as their
2306 offsets were changed, as part of -z combreloc handling, from those we
2307 computed. */
2308
2309 static bfd_boolean
2310 elf_cris_finish_dynamic_sections (bfd *output_bfd,
2311 struct bfd_link_info *info)
2312 {
2313 bfd *dynobj;
2314 asection *sgot;
2315 asection *sdyn;
2316
2317 dynobj = elf_hash_table (info)->dynobj;
2318
2319 sgot = elf_hash_table (info)->sgotplt;
2320 BFD_ASSERT (sgot != NULL);
2321 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2322
2323 if (elf_hash_table (info)->dynamic_sections_created)
2324 {
2325 asection *splt;
2326 Elf32_External_Dyn *dyncon, *dynconend;
2327
2328 splt = elf_hash_table (info)->splt;
2329 BFD_ASSERT (splt != NULL && sdyn != NULL);
2330
2331 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2332 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2333 for (; dyncon < dynconend; dyncon++)
2334 {
2335 Elf_Internal_Dyn dyn;
2336 asection *s;
2337
2338 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2339
2340 switch (dyn.d_tag)
2341 {
2342 default:
2343 break;
2344
2345 case DT_PLTGOT:
2346 dyn.d_un.d_ptr = sgot->output_section->vma + sgot->output_offset;
2347 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2348 break;
2349
2350 case DT_JMPREL:
2351 /* Yes, we *can* have a .plt and no .plt.rela, for instance
2352 if all symbols are found in the .got (not .got.plt). */
2353 s = elf_hash_table (info)->srelplt;
2354 dyn.d_un.d_ptr = s != NULL ? (s->output_section->vma
2355 + s->output_offset) : 0;
2356 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2357 break;
2358
2359 case DT_PLTRELSZ:
2360 s = elf_hash_table (info)->srelplt;
2361 if (s == NULL)
2362 dyn.d_un.d_val = 0;
2363 else
2364 dyn.d_un.d_val = s->size;
2365 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2366 break;
2367 }
2368 }
2369
2370 /* Fill in the first entry in the procedure linkage table. */
2371 if (splt->size > 0)
2372 {
2373 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2374 {
2375 if (bfd_link_pic (info))
2376 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2377 PLT_ENTRY_SIZE_V32);
2378 else
2379 {
2380 memcpy (splt->contents, elf_cris_plt0_entry_v32,
2381 PLT_ENTRY_SIZE_V32);
2382 bfd_put_32 (output_bfd,
2383 sgot->output_section->vma
2384 + sgot->output_offset + 4,
2385 splt->contents + 4);
2386
2387 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2388 = PLT_ENTRY_SIZE_V32;
2389 }
2390 }
2391 else
2392 {
2393 if (bfd_link_pic (info))
2394 memcpy (splt->contents, elf_cris_pic_plt0_entry,
2395 PLT_ENTRY_SIZE);
2396 else
2397 {
2398 memcpy (splt->contents, elf_cris_plt0_entry,
2399 PLT_ENTRY_SIZE);
2400 bfd_put_32 (output_bfd,
2401 sgot->output_section->vma
2402 + sgot->output_offset + 4,
2403 splt->contents + 6);
2404 bfd_put_32 (output_bfd,
2405 sgot->output_section->vma
2406 + sgot->output_offset + 8,
2407 splt->contents + 14);
2408
2409 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2410 = PLT_ENTRY_SIZE;
2411 }
2412 }
2413 }
2414 }
2415
2416 /* Fill in the first three entries in the global offset table. */
2417 if (sgot->size > 0)
2418 {
2419 if (sdyn == NULL)
2420 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2421 else
2422 bfd_put_32 (output_bfd,
2423 sdyn->output_section->vma + sdyn->output_offset,
2424 sgot->contents);
2425 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2426 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2427 }
2428
2429 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2430
2431 return TRUE;
2432 }
2433 \f
2434 /* Return the section that should be marked against GC for a given
2435 relocation. */
2436
2437 static asection *
2438 cris_elf_gc_mark_hook (asection *sec,
2439 struct bfd_link_info *info,
2440 Elf_Internal_Rela *rel,
2441 struct elf_link_hash_entry *h,
2442 Elf_Internal_Sym *sym)
2443 {
2444 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2445 if (h != NULL)
2446 switch (r_type)
2447 {
2448 case R_CRIS_GNU_VTINHERIT:
2449 case R_CRIS_GNU_VTENTRY:
2450 return NULL;
2451
2452 default:
2453 break;
2454 }
2455
2456 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2457 }
2458
2459 /* The elf_backend_plt_sym_val hook function. */
2460
2461 static bfd_vma
2462 cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, const asection *plt,
2463 const arelent *rel)
2464 {
2465 bfd_size_type plt_entry_size;
2466 bfd_size_type pltoffs;
2467 bfd *abfd = plt->owner;
2468
2469 /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[]. */
2470 bfd_size_type plt_entry_got_offset = 2;
2471 bfd_size_type plt_sec_size;
2472 bfd_size_type got_vma_for_dyn;
2473 asection *got;
2474
2475 /* FIXME: the .got section should be readily available also when
2476 we're not linking. */
2477 if ((got = bfd_get_section_by_name (abfd, ".got")) == NULL)
2478 return (bfd_vma) -1;
2479
2480 plt_sec_size = bfd_section_size (plt->owner, plt);
2481 plt_entry_size
2482 = (bfd_get_mach (abfd) == bfd_mach_cris_v32
2483 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2484
2485 /* Data in PLT is GOT-relative for DYN, but absolute for EXE. */
2486 got_vma_for_dyn = (abfd->flags & EXEC_P) ? 0 : got->vma;
2487
2488 /* Because we can have merged GOT entries; a single .got entry for
2489 both GOT and the PLT part of the GOT (.got.plt), the index of the
2490 reloc in .rela.plt is not the same as the index in the PLT.
2491 Instead, we have to hunt down the GOT offset in the PLT that
2492 corresponds to that of this reloc. Unfortunately, we will only
2493 be called for the .rela.plt relocs, so we'll miss synthetic
2494 symbols for .plt entries with merged GOT entries. (FIXME:
2495 fixable by providing our own bfd_elf32_get_synthetic_symtab.
2496 Doesn't seem worthwile at time of this writing.) FIXME: we've
2497 gone from O(1) to O(N) (N number of PLT entries) for finding each
2498 PLT address. Shouldn't matter in practice though. */
2499
2500 for (pltoffs = plt_entry_size;
2501 pltoffs < plt_sec_size;
2502 pltoffs += plt_entry_size)
2503 {
2504 bfd_size_type got_offset;
2505 bfd_byte gotoffs_raw[4];
2506
2507 if (!bfd_get_section_contents (abfd, (asection *) plt, gotoffs_raw,
2508 pltoffs + plt_entry_got_offset,
2509 sizeof (gotoffs_raw)))
2510 return (bfd_vma) -1;
2511
2512 got_offset = bfd_get_32 (abfd, gotoffs_raw);
2513 if (got_offset + got_vma_for_dyn == rel->address)
2514 return plt->vma + pltoffs;
2515 }
2516
2517 /* While it's tempting to BFD_ASSERT that we shouldn't get here,
2518 that'd not be graceful behavior for invalid input. */
2519 return (bfd_vma) -1;
2520 }
2521
2522 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2523 entry but we found we will not create any. Called when we find we will
2524 not have any PLT for this symbol, by for example
2525 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2526 or elf_cris_size_dynamic_sections if no dynamic sections will be
2527 created (we're only linking static objects). */
2528
2529 static bfd_boolean
2530 elf_cris_adjust_gotplt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2531 {
2532 struct bfd_link_info *info = (struct bfd_link_info *) p;
2533
2534 /* A GOTPLT reloc, when activated, is supposed to be included into
2535 the PLT refcount, when the symbol isn't set-or-forced local. */
2536 BFD_ASSERT (h->gotplt_refcount == 0
2537 || h->root.plt.refcount == -1
2538 || h->gotplt_refcount <= h->root.plt.refcount);
2539
2540 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2541 if (h->gotplt_refcount <= 0)
2542 return TRUE;
2543
2544 if (h->reg_got_refcount > 0)
2545 {
2546 /* There's a GOT entry for this symbol. Just adjust the refcounts.
2547 Probably not necessary at this stage, but keeping them accurate
2548 helps avoiding surprises later. */
2549 h->root.got.refcount += h->gotplt_refcount;
2550 h->reg_got_refcount += h->gotplt_refcount;
2551 h->gotplt_refcount = 0;
2552 }
2553 else
2554 {
2555 /* No GOT entry for this symbol. We need to create one. */
2556 asection *sgot;
2557 asection *srelgot;
2558
2559 sgot = elf_hash_table (info)->sgot;
2560 srelgot = elf_hash_table (info)->srelgot;
2561
2562 /* Put accurate refcounts there. */
2563 BFD_ASSERT (h->root.got.refcount >= 0);
2564 h->root.got.refcount += h->gotplt_refcount;
2565 h->reg_got_refcount = h->gotplt_refcount;
2566
2567 h->gotplt_refcount = 0;
2568
2569 /* We always have a .got and a .rela.got section if there were
2570 GOTPLT relocs in input. */
2571 BFD_ASSERT (sgot != NULL && srelgot != NULL);
2572
2573 /* Allocate space in the .got section. */
2574 sgot->size += 4;
2575
2576 /* Allocate relocation space. */
2577 srelgot->size += sizeof (Elf32_External_Rela);
2578 }
2579
2580 return TRUE;
2581 }
2582
2583 /* Try to fold PLT entries with GOT entries. There are two cases when we
2584 want to do this:
2585
2586 - When all PLT references are GOTPLT references, and there are GOT
2587 references, and this is not the executable. We don't have to
2588 generate a PLT at all.
2589
2590 - When there are both (ordinary) PLT references and GOT references,
2591 and this isn't the executable.
2592 We want to make the PLT reference use the ordinary GOT entry rather
2593 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2594 since the GOT entry will have to be resolved at startup anyway.
2595
2596 Though the latter case is handled when room for the PLT is allocated,
2597 not here.
2598
2599 By folding into the GOT, we may need a round-trip to a PLT in the
2600 executable for calls, a loss in performance. Still, losing a
2601 reloc is a win in size and at least in start-up time.
2602
2603 Note that this function is called before symbols are forced local by
2604 version scripts. The differing cases are handled by
2605 elf_cris_hide_symbol. */
2606
2607 static bfd_boolean
2608 elf_cris_try_fold_plt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2609 {
2610 struct bfd_link_info *info = (struct bfd_link_info *) p;
2611
2612 /* If there are no GOT references for this symbol, we can't fold any
2613 other reference so there's nothing to do. Likewise if there are no
2614 PLT references; GOTPLT references included. */
2615 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2616 return TRUE;
2617
2618 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2619 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2620
2621 if (h->gotplt_refcount == h->root.plt.refcount)
2622 {
2623 /* The only PLT references are GOTPLT references, and there are GOT
2624 references. Convert PLT to GOT references. */
2625 if (! elf_cris_adjust_gotplt_to_got (h, info))
2626 return FALSE;
2627
2628 /* Clear the PLT references, so no PLT will be created. */
2629 h->root.plt.offset = (bfd_vma) -1;
2630 }
2631
2632 return TRUE;
2633 }
2634
2635 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2636 to use a GOT entry (and create one) rather than requiring a GOTPLT
2637 entry. */
2638
2639 static void
2640 elf_cris_hide_symbol (struct bfd_link_info *info,
2641 struct elf_link_hash_entry *h,
2642 bfd_boolean force_local)
2643 {
2644 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2645
2646 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2647 }
2648
2649 /* Adjust a symbol defined by a dynamic object and referenced by a
2650 regular object. The current definition is in some section of the
2651 dynamic object, but we're not including those sections. We have to
2652 change the definition to something the rest of the link can
2653 understand. */
2654
2655 static bfd_boolean
2656 elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
2657 struct elf_link_hash_entry *h)
2658 {
2659 struct elf_cris_link_hash_table * htab;
2660 bfd *dynobj;
2661 asection *s;
2662 asection *srel;
2663 bfd_size_type plt_entry_size;
2664
2665 htab = elf_cris_hash_table (info);
2666 if (htab == NULL)
2667 return FALSE;
2668
2669 dynobj = htab->root.dynobj;
2670
2671 /* Make sure we know what is going on here. */
2672 BFD_ASSERT (dynobj != NULL
2673 && (h->needs_plt
2674 || h->is_weakalias
2675 || (h->def_dynamic
2676 && h->ref_regular
2677 && !h->def_regular)));
2678
2679 plt_entry_size
2680 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2681 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2682
2683 /* If this is a function, put it in the procedure linkage table. We
2684 will fill in the contents of the procedure linkage table later,
2685 when we know the address of the .got section. */
2686 if (h->type == STT_FUNC
2687 || h->needs_plt)
2688 {
2689 /* If we link a program (not a DSO), we'll get rid of unnecessary
2690 PLT entries; we point to the actual symbols -- even for pic
2691 relocs, because a program built with -fpic should have the same
2692 result as one built without -fpic, specifically considering weak
2693 symbols.
2694 FIXME: m68k and i386 differ here, for unclear reasons. */
2695 if (! bfd_link_pic (info)
2696 && !h->def_dynamic)
2697 {
2698 /* This case can occur if we saw a PLT reloc in an input file,
2699 but the symbol was not defined by a dynamic object. In such
2700 a case, we don't actually need to build a procedure linkage
2701 table, and we can just do an absolute or PC reloc instead, or
2702 change a .got.plt index to a .got index for GOTPLT relocs. */
2703 BFD_ASSERT (h->needs_plt);
2704 h->needs_plt = 0;
2705 h->plt.offset = (bfd_vma) -1;
2706 return
2707 elf_cris_adjust_gotplt_to_got ((struct
2708 elf_cris_link_hash_entry *) h,
2709 info);
2710 }
2711
2712 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2713 where a pointer-equivalent symbol was unimportant (i.e. more
2714 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2715 of the PLT. We can't for the executable, because the GOT
2716 entries will point to the PLT there (and be constant). */
2717 if (bfd_link_pic (info)
2718 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2719 h, info))
2720 return FALSE;
2721
2722 /* GC or folding may have rendered this entry unused. */
2723 if (h->plt.refcount <= 0)
2724 {
2725 h->needs_plt = 0;
2726 h->plt.offset = (bfd_vma) -1;
2727 return TRUE;
2728 }
2729
2730 /* Make sure this symbol is output as a dynamic symbol. */
2731 if (h->dynindx == -1)
2732 {
2733 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2734 return FALSE;
2735 }
2736
2737 s = htab->root.splt;
2738 BFD_ASSERT (s != NULL);
2739
2740 /* If this is the first .plt entry, make room for the special
2741 first entry. */
2742 if (s->size == 0)
2743 s->size += plt_entry_size;
2744
2745 /* If this symbol is not defined in a regular file, and we are
2746 not generating a shared library, then set the symbol to this
2747 location in the .plt. */
2748 if (!bfd_link_pic (info)
2749 && !h->def_regular)
2750 {
2751 h->root.u.def.section = s;
2752 h->root.u.def.value = s->size;
2753 }
2754
2755 /* If there's already a GOT entry, use that, not a .got.plt. A
2756 GOT field still has a reference count when we get here; it's
2757 not yet changed to an offset. We can't do this for an
2758 executable, because then the reloc associated with the PLT
2759 would get a non-PLT reloc pointing to the PLT. FIXME: Move
2760 this to elf_cris_try_fold_plt_to_got. */
2761 if (bfd_link_pic (info) && h->got.refcount > 0)
2762 {
2763 h->got.refcount += h->plt.refcount;
2764
2765 /* Mark the PLT offset to use the GOT entry by setting the low
2766 bit in the plt offset; it is always a multiple of
2767 plt_entry_size (which is at least a multiple of 2). */
2768 BFD_ASSERT ((s->size % plt_entry_size) == 0);
2769
2770 /* Change the PLT refcount to an offset. */
2771 h->plt.offset = s->size;
2772
2773 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2774 that the got entry should be used instead. */
2775 BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2776 h)->gotplt_offset == 0);
2777
2778 /* Make room for this entry. */
2779 s->size += plt_entry_size;
2780
2781 return TRUE;
2782 }
2783
2784 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2785 h->plt.offset = s->size;
2786
2787 /* Make room for this entry. */
2788 s->size += plt_entry_size;
2789
2790 /* We also need to make an entry in the .got.plt section, which
2791 will be placed in the .got section by the linker script. */
2792 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2793 = htab->next_gotplt_entry;
2794 htab->next_gotplt_entry += 4;
2795
2796 s = htab->root.sgotplt;
2797 BFD_ASSERT (s != NULL);
2798 s->size += 4;
2799
2800 /* We also need to make an entry in the .rela.plt section. */
2801
2802 s = htab->root.srelplt;
2803 BFD_ASSERT (s != NULL);
2804 s->size += sizeof (Elf32_External_Rela);
2805
2806 return TRUE;
2807 }
2808
2809 /* Reinitialize the plt offset now that it is not used as a reference
2810 count any more. */
2811 h->plt.offset = (bfd_vma) -1;
2812
2813 /* If this is a weak symbol, and there is a real definition, the
2814 processor independent code will have arranged for us to see the
2815 real definition first, and we can just use the same value. */
2816 if (h->is_weakalias)
2817 {
2818 struct elf_link_hash_entry *def = weakdef (h);
2819 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2820 h->root.u.def.section = def->root.u.def.section;
2821 h->root.u.def.value = def->root.u.def.value;
2822 return TRUE;
2823 }
2824
2825 /* This is a reference to a symbol defined by a dynamic object which
2826 is not a function. */
2827
2828 /* If we are creating a shared library, we must presume that the
2829 only references to the symbol are via the global offset table.
2830 For such cases we need not do anything here; the relocations will
2831 be handled correctly by relocate_section. */
2832 if (bfd_link_pic (info))
2833 return TRUE;
2834
2835 /* If there are no references to this symbol that do not use the
2836 GOT, we don't need to generate a copy reloc. */
2837 if (!h->non_got_ref)
2838 return TRUE;
2839
2840 /* We must allocate the symbol in our .dynbss section, which will
2841 become part of the .bss section of the executable. There will be
2842 an entry for this symbol in the .dynsym section. The dynamic
2843 object will contain position independent code, so all references
2844 from the dynamic object to this symbol will go through the global
2845 offset table. The dynamic linker will use the .dynsym entry to
2846 determine the address it must put in the global offset table, so
2847 both the dynamic object and the regular object will refer to the
2848 same memory location for the variable. */
2849
2850 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2851 copy the initial value out of the dynamic object and into the
2852 runtime process image. We need to remember the offset into the
2853 .rela.bss section we are going to use. */
2854
2855 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
2856 {
2857 s = htab->root.sdynrelro;
2858 srel = htab->root.sreldynrelro;
2859 }
2860 else
2861 {
2862 s = htab->root.sdynbss;
2863 srel = htab->root.srelbss;
2864 }
2865 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2866 {
2867 BFD_ASSERT (srel != NULL);
2868 srel->size += sizeof (Elf32_External_Rela);
2869 h->needs_copy = 1;
2870 }
2871
2872 BFD_ASSERT (s != NULL);
2873
2874 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2875 }
2876
2877 /* Adjust our "subclass" elements for an indirect symbol. */
2878
2879 static void
2880 elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
2881 struct elf_link_hash_entry *dir,
2882 struct elf_link_hash_entry *ind)
2883 {
2884 struct elf_cris_link_hash_entry *edir, *eind;
2885
2886 edir = (struct elf_cris_link_hash_entry *) dir;
2887 eind = (struct elf_cris_link_hash_entry *) ind;
2888
2889 /* Only indirect symbols are replaced; we're not interested in
2890 updating any of EIND's fields for other symbols. */
2891 if (eind->root.root.type != bfd_link_hash_indirect)
2892 {
2893 /* Still, we need to copy flags for e.g. weak definitions. */
2894 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2895 return;
2896 }
2897
2898 BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
2899
2900 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
2901 #define XMOVE(F) XMOVOPZ (F, +=, 0)
2902 if (eind->pcrel_relocs_copied != NULL)
2903 {
2904 if (edir->pcrel_relocs_copied != NULL)
2905 {
2906 struct elf_cris_pcrel_relocs_copied **pp;
2907 struct elf_cris_pcrel_relocs_copied *p;
2908
2909 /* Add reloc counts against the indirect sym to the direct sym
2910 list. Merge any entries against the same section. */
2911 for (pp = &eind->pcrel_relocs_copied; *pp != NULL;)
2912 {
2913 struct elf_cris_pcrel_relocs_copied *q;
2914 p = *pp;
2915 for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next)
2916 if (q->section == p->section)
2917 {
2918 q->count += p->count;
2919 *pp = p->next;
2920 break;
2921 }
2922 if (q == NULL)
2923 pp = &p->next;
2924 }
2925 *pp = edir->pcrel_relocs_copied;
2926 }
2927 XMOVOPZ (pcrel_relocs_copied, =, NULL);
2928 }
2929 XMOVE (gotplt_refcount);
2930 XMOVE (gotplt_offset);
2931 XMOVE (reg_got_refcount);
2932 XMOVE (tprel_refcount);
2933 XMOVE (dtp_refcount);
2934 #undef XMOVE
2935 #undef XMOVOPZ
2936
2937 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2938 }
2939
2940 /* Look through the relocs for a section during the first phase. */
2941
2942 static bfd_boolean
2943 cris_elf_check_relocs (bfd *abfd,
2944 struct bfd_link_info *info,
2945 asection *sec,
2946 const Elf_Internal_Rela *relocs)
2947 {
2948 struct elf_cris_link_hash_table * htab;
2949 bfd *dynobj;
2950 Elf_Internal_Shdr *symtab_hdr;
2951 struct elf_link_hash_entry **sym_hashes;
2952 bfd_signed_vma *local_got_refcounts;
2953 const Elf_Internal_Rela *rel;
2954 const Elf_Internal_Rela *rel_end;
2955 asection *sgot;
2956 asection *srelgot;
2957 asection *sreloc;
2958
2959 if (bfd_link_relocatable (info))
2960 return TRUE;
2961
2962 htab = elf_cris_hash_table (info);
2963 if (htab == NULL)
2964 return FALSE;
2965
2966 dynobj = elf_hash_table (info)->dynobj;
2967 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2968 sym_hashes = elf_sym_hashes (abfd);
2969 local_got_refcounts = elf_local_got_refcounts (abfd);
2970
2971 sgot = NULL;
2972 srelgot = NULL;
2973 sreloc = NULL;
2974
2975 rel_end = relocs + sec->reloc_count;
2976 for (rel = relocs; rel < rel_end; rel++)
2977 {
2978 struct elf_link_hash_entry *h;
2979 unsigned long r_symndx;
2980 enum elf_cris_reloc_type r_type;
2981 bfd_signed_vma got_element_size = 4;
2982 unsigned long r_symndx_lgot = INT_MAX;
2983
2984 r_symndx = ELF32_R_SYM (rel->r_info);
2985 if (r_symndx < symtab_hdr->sh_info)
2986 {
2987 h = NULL;
2988 r_symndx_lgot = LGOT_REG_NDX (r_symndx);
2989 }
2990 else
2991 {
2992 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2993 while (h->root.type == bfd_link_hash_indirect
2994 || h->root.type == bfd_link_hash_warning)
2995 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2996 }
2997
2998 r_type = ELF32_R_TYPE (rel->r_info);
2999
3000 /* Some relocs require linker-created sections; we need to hang them
3001 on the first input bfd we found that contained dynamic relocs. */
3002 switch (r_type)
3003 {
3004 case R_CRIS_32_DTPREL:
3005 if ((sec->flags & SEC_ALLOC) == 0)
3006 /* This'd be a .dtpreld entry in e.g. debug info. We have
3007 several different switch statements below, but none of
3008 that is needed; we need no preparations for resolving
3009 R_CRIS_32_DTPREL into a non-allocated section (debug
3010 info), so let's just move on to the next
3011 relocation. */
3012 continue;
3013 /* Fall through. */
3014 case R_CRIS_16_DTPREL:
3015 /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3016 entry at index 3. */
3017 if (htab->dtpmod_refcount == 0)
3018 htab->next_gotplt_entry += 8;
3019
3020 htab->dtpmod_refcount++;
3021 /* Fall through. */
3022
3023 case R_CRIS_32_IE:
3024 case R_CRIS_32_GD:
3025 case R_CRIS_16_GOT_GD:
3026 case R_CRIS_32_GOT_GD:
3027 case R_CRIS_32_GOT_TPREL:
3028 case R_CRIS_16_GOT_TPREL:
3029 case R_CRIS_16_GOT:
3030 case R_CRIS_32_GOT:
3031 case R_CRIS_32_GOTREL:
3032 case R_CRIS_32_PLT_GOTREL:
3033 case R_CRIS_32_PLT_PCREL:
3034 case R_CRIS_16_GOTPLT:
3035 case R_CRIS_32_GOTPLT:
3036 if (dynobj == NULL)
3037 {
3038 elf_hash_table (info)->dynobj = dynobj = abfd;
3039
3040 /* We could handle this if we can get a handle on the
3041 output bfd in elf_cris_adjust_dynamic_symbol. Failing
3042 that, we must insist on dynobj being a specific mach. */
3043 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3044 {
3045 _bfd_error_handler
3046 /* xgettext:c-format */
3047 (_("%B, section %A:\n v10/v32 compatible object"
3048 " must not contain a PIC relocation"),
3049 abfd, sec);
3050 return FALSE;
3051 }
3052 }
3053
3054 if (sgot == NULL)
3055 {
3056 /* We may have a dynobj but no .got section, if machine-
3057 independent parts of the linker found a reason to create
3058 a dynobj. We want to create the .got section now, so we
3059 can assume it's always present whenever there's a dynobj.
3060 It's ok to call this function more than once. */
3061 if (!_bfd_elf_create_got_section (dynobj, info))
3062 return FALSE;
3063
3064 sgot = elf_hash_table (info)->sgot;
3065 srelgot = elf_hash_table (info)->srelgot;
3066 }
3067
3068 if (local_got_refcounts == NULL)
3069 {
3070 bfd_size_type amt;
3071
3072 /* We use index local_got_refcounts[-1] to count all
3073 GOT-relative relocations that do not have explicit
3074 GOT entries. */
3075 amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3076 amt *= sizeof (bfd_signed_vma);
3077 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3078 if (local_got_refcounts == NULL)
3079 return FALSE;
3080
3081 local_got_refcounts++;
3082 elf_local_got_refcounts (abfd) = local_got_refcounts;
3083 }
3084 break;
3085
3086 default:
3087 break;
3088 }
3089
3090 /* Warn and error for invalid input. */
3091 switch (r_type)
3092 {
3093 case R_CRIS_32_IE:
3094 case R_CRIS_32_TPREL:
3095 case R_CRIS_16_TPREL:
3096 case R_CRIS_32_GD:
3097 if (bfd_link_pic (info))
3098 {
3099 _bfd_error_handler
3100 /* xgettext:c-format */
3101 (_("%B, section %A:\n relocation %s not valid"
3102 " in a shared object;"
3103 " typically an option mixup, recompile with -fPIC"),
3104 abfd,
3105 sec,
3106 cris_elf_howto_table[r_type].name);
3107 /* Don't return FALSE here; we want messages for all of
3108 these and the error behavior is ungraceful
3109 anyway. */
3110 }
3111 default:
3112 break;
3113 }
3114
3115 switch (r_type)
3116 {
3117 case R_CRIS_32_GD:
3118 case R_CRIS_16_GOT_GD:
3119 case R_CRIS_32_GOT_GD:
3120 /* These are requests for tls_index entries, run-time R_CRIS_DTP. */
3121 got_element_size = 8;
3122 r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3123 break;
3124
3125 case R_CRIS_16_DTPREL:
3126 case R_CRIS_32_DTPREL:
3127 /* These two just request for the constant-index
3128 module-local tls_index-sized GOT entry, which we add
3129 elsewhere. */
3130 break;
3131
3132 case R_CRIS_32_IE:
3133 case R_CRIS_32_GOT_TPREL:
3134 case R_CRIS_16_GOT_TPREL:
3135 r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3136
3137 /* Those relocs also require that a DSO is of type
3138 Initial Exec. Like other targets, we don't reset this
3139 flag even if the relocs are GC:ed away. */
3140 if (bfd_link_pic (info))
3141 info->flags |= DF_STATIC_TLS;
3142 break;
3143
3144 /* Let's list the other assembler-generated TLS-relocs too,
3145 just to show that they're not forgotten. */
3146 case R_CRIS_16_TPREL:
3147 case R_CRIS_32_TPREL:
3148 default:
3149 break;
3150 }
3151
3152 switch (r_type)
3153 {
3154 case R_CRIS_16_GOTPLT:
3155 case R_CRIS_32_GOTPLT:
3156 /* Mark that we need a GOT entry if the PLT entry (and its GOT
3157 entry) is eliminated. We can only do this for a non-local
3158 symbol. */
3159 if (h != NULL)
3160 {
3161 elf_cris_hash_entry (h)->gotplt_refcount++;
3162 goto handle_gotplt_reloc;
3163 }
3164 /* If h is NULL then this is a local symbol, and we must make a
3165 GOT entry for it, so handle it like a GOT reloc. */
3166 /* Fall through. */
3167
3168 case R_CRIS_32_IE:
3169 case R_CRIS_32_GD:
3170 case R_CRIS_16_GOT_GD:
3171 case R_CRIS_32_GOT_GD:
3172 case R_CRIS_32_GOT_TPREL:
3173 case R_CRIS_16_GOT_TPREL:
3174 case R_CRIS_16_GOT:
3175 case R_CRIS_32_GOT:
3176 /* This symbol requires a global offset table entry. */
3177 if (h != NULL)
3178 {
3179 if (h->got.refcount == 0)
3180 {
3181 /* Make sure this symbol is output as a dynamic symbol. */
3182 if (h->dynindx == -1)
3183 {
3184 if (!bfd_elf_link_record_dynamic_symbol (info, h))
3185 return FALSE;
3186 }
3187 }
3188
3189 /* Update the sum of reloc counts for this symbol. */
3190 h->got.refcount++;
3191
3192 switch (r_type)
3193 {
3194 case R_CRIS_16_GOT:
3195 case R_CRIS_32_GOT:
3196 if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3197 {
3198 /* Allocate space in the .got section. */
3199 sgot->size += got_element_size;
3200 /* Allocate relocation space. */
3201 srelgot->size += sizeof (Elf32_External_Rela);
3202 }
3203 elf_cris_hash_entry (h)->reg_got_refcount++;
3204 break;
3205
3206 case R_CRIS_32_GD:
3207 case R_CRIS_16_GOT_GD:
3208 case R_CRIS_32_GOT_GD:
3209 if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3210 {
3211 /* Allocate space in the .got section. */
3212 sgot->size += got_element_size;
3213 /* Allocate relocation space. */
3214 srelgot->size += sizeof (Elf32_External_Rela);
3215 }
3216 elf_cris_hash_entry (h)->dtp_refcount++;
3217 break;
3218
3219 case R_CRIS_32_IE:
3220 case R_CRIS_32_GOT_TPREL:
3221 case R_CRIS_16_GOT_TPREL:
3222 if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3223 {
3224 /* Allocate space in the .got section. */
3225 sgot->size += got_element_size;
3226 /* Allocate relocation space. */
3227 srelgot->size += sizeof (Elf32_External_Rela);
3228 }
3229 elf_cris_hash_entry (h)->tprel_refcount++;
3230 break;
3231
3232 default:
3233 BFD_FAIL ();
3234 break;
3235 }
3236 }
3237 else
3238 {
3239 /* This is a global offset table entry for a local symbol. */
3240 if (local_got_refcounts[r_symndx_lgot] == 0)
3241 {
3242 sgot->size += got_element_size;
3243 if (bfd_link_pic (info))
3244 {
3245 /* If we are generating a shared object, we need
3246 to output a R_CRIS_RELATIVE reloc so that the
3247 dynamic linker can adjust this GOT entry.
3248 Similarly for non-regular got entries. */
3249 srelgot->size += sizeof (Elf32_External_Rela);
3250 }
3251 }
3252 /* Update the reloc-specific count. */
3253 local_got_refcounts[r_symndx_lgot]++;
3254
3255 /* This one is the sum of all the others. */
3256 local_got_refcounts[r_symndx]++;
3257 }
3258 break;
3259
3260 case R_CRIS_16_DTPREL:
3261 case R_CRIS_32_DTPREL:
3262 case R_CRIS_32_GOTREL:
3263 /* This reference requires a global offset table.
3264 FIXME: The actual refcount isn't used currently; the .got
3265 section can't be removed if there were any references in the
3266 input. */
3267 local_got_refcounts[-1]++;
3268 break;
3269
3270 handle_gotplt_reloc:
3271
3272 case R_CRIS_32_PLT_GOTREL:
3273 /* This reference requires a global offset table. */
3274 local_got_refcounts[-1]++;
3275 /* Fall through. */
3276
3277 case R_CRIS_32_PLT_PCREL:
3278 /* This symbol requires a procedure linkage table entry. We
3279 actually build the entry in adjust_dynamic_symbol,
3280 because this might be a case of linking PIC code which is
3281 never referenced by a dynamic object, in which case we
3282 don't need to generate a procedure linkage table entry
3283 after all. */
3284
3285 /* Beware: if we'd check for visibility of the symbol here
3286 (and not marking the need for a PLT when non-visible), we'd
3287 get into trouble with keeping handling consistent with
3288 regards to relocs found before definition and GOTPLT
3289 handling. Eliminable PLT entries will be dealt with later
3290 anyway. */
3291 if (h == NULL)
3292 continue;
3293
3294 h->needs_plt = 1;
3295
3296 /* If the symbol is forced local, the refcount is unavailable. */
3297 if (h->plt.refcount != -1)
3298 h->plt.refcount++;
3299 break;
3300
3301 case R_CRIS_8:
3302 case R_CRIS_16:
3303 case R_CRIS_32:
3304 /* Let's help debug shared library creation. Any of these
3305 relocs *can* be used in shared libs, but pages containing
3306 them cannot be shared, so they're not appropriate for
3307 common use. Don't warn for sections we don't care about,
3308 such as debug sections or non-constant sections. We
3309 can't help tables of (global) function pointers, for
3310 example, though they must be emitted in a (writable) data
3311 section to avoid having impure text sections. */
3312 if (bfd_link_pic (info)
3313 && (sec->flags & SEC_ALLOC) != 0
3314 && (sec->flags & SEC_READONLY) != 0)
3315 {
3316 /* FIXME: How do we make this optionally a warning only? */
3317 _bfd_error_handler
3318 /* xgettext:c-format */
3319 (_("%B, section %A:\n relocation %s should not"
3320 " be used in a shared object; recompile with -fPIC"),
3321 abfd,
3322 sec,
3323 cris_elf_howto_table[r_type].name);
3324 }
3325
3326 /* We don't need to handle relocs into sections not going into
3327 the "real" output. */
3328 if ((sec->flags & SEC_ALLOC) == 0)
3329 break;
3330
3331 if (h != NULL)
3332 {
3333 h->non_got_ref = 1;
3334
3335 /* Make sure a plt entry is created for this symbol if it
3336 turns out to be a function defined by a dynamic object. */
3337 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3338 h->plt.refcount++;
3339 }
3340
3341 /* If we are creating a shared library and this is not a local
3342 symbol, we need to copy the reloc into the shared library.
3343 However when linking with -Bsymbolic and this is a global
3344 symbol which is defined in an object we are including in the
3345 link (i.e., DEF_REGULAR is set), then we can resolve the
3346 reloc directly. At this point we have not seen all the input
3347 files, so it is possible that DEF_REGULAR is not set now but
3348 will be set later (it is never cleared). In case of a weak
3349 definition, DEF_REGULAR may be cleared later by a strong
3350 definition in a shared library. We account for that
3351 possibility below by storing information in the relocs_copied
3352 field of the hash table entry. A similar situation occurs
3353 when creating shared libraries and symbol visibility changes
3354 render the symbol local. */
3355
3356 /* No need to do anything if we're not creating a shared object. */
3357 if (! bfd_link_pic (info)
3358 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3359 break;
3360
3361 /* We may need to create a reloc section in the dynobj and made room
3362 for this reloc. */
3363 if (sreloc == NULL)
3364 {
3365 sreloc = _bfd_elf_make_dynamic_reloc_section
3366 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3367
3368 if (sreloc == NULL)
3369 return FALSE;
3370 }
3371
3372 if (sec->flags & SEC_READONLY)
3373 info->flags |= DF_TEXTREL;
3374
3375 sreloc->size += sizeof (Elf32_External_Rela);
3376 break;
3377
3378 case R_CRIS_8_PCREL:
3379 case R_CRIS_16_PCREL:
3380 case R_CRIS_32_PCREL:
3381 if (h != NULL)
3382 {
3383 h->non_got_ref = 1;
3384
3385 /* Make sure a plt entry is created for this symbol if it
3386 turns out to be a function defined by a dynamic object. */
3387 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3388 h->plt.refcount++;
3389 }
3390
3391 /* If we are creating a shared library and this is not a local
3392 symbol, we need to copy the reloc into the shared library.
3393 However when linking with -Bsymbolic and this is a global
3394 symbol which is defined in an object we are including in the
3395 link (i.e., DEF_REGULAR is set), then we can resolve the
3396 reloc directly. At this point we have not seen all the input
3397 files, so it is possible that DEF_REGULAR is not set now but
3398 will be set later (it is never cleared). In case of a weak
3399 definition, DEF_REGULAR may be cleared later by a strong
3400 definition in a shared library. We account for that
3401 possibility below by storing information in the relocs_copied
3402 field of the hash table entry. A similar situation occurs
3403 when creating shared libraries and symbol visibility changes
3404 render the symbol local. */
3405
3406 /* No need to do anything if we're not creating a shared object. */
3407 if (! bfd_link_pic (info))
3408 break;
3409
3410 /* We don't need to handle relocs into sections not going into
3411 the "real" output. */
3412 if ((sec->flags & SEC_ALLOC) == 0)
3413 break;
3414
3415 /* If the symbol is local, then we know already we can
3416 eliminate the reloc. */
3417 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3418 break;
3419
3420 /* If this is with -Bsymbolic and the symbol isn't weak, and
3421 is defined by an ordinary object (the ones we include in
3422 this shared library) then we can also eliminate the
3423 reloc. See comment above for more eliminable cases which
3424 we can't identify at this time. */
3425 if (SYMBOLIC_BIND (info, h)
3426 && h->root.type != bfd_link_hash_defweak
3427 && h->def_regular)
3428 break;
3429
3430 /* We may need to create a reloc section in the dynobj and made room
3431 for this reloc. */
3432 if (sreloc == NULL)
3433 {
3434 sreloc = _bfd_elf_make_dynamic_reloc_section
3435 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3436
3437 if (sreloc == NULL)
3438 return FALSE;
3439 }
3440
3441 sreloc->size += sizeof (Elf32_External_Rela);
3442
3443 /* We count the number of PC relative relocations we have
3444 entered for this symbol, so that we can discard them
3445 again if the symbol is later defined by a regular object.
3446 We know that h is really a pointer to an
3447 elf_cris_link_hash_entry. */
3448 {
3449 struct elf_cris_link_hash_entry *eh;
3450 struct elf_cris_pcrel_relocs_copied *p;
3451
3452 eh = elf_cris_hash_entry (h);
3453
3454 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3455 if (p->section == sec)
3456 break;
3457
3458 if (p == NULL)
3459 {
3460 p = ((struct elf_cris_pcrel_relocs_copied *)
3461 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3462 if (p == NULL)
3463 return FALSE;
3464 p->next = eh->pcrel_relocs_copied;
3465 eh->pcrel_relocs_copied = p;
3466 p->section = sec;
3467 p->count = 0;
3468 p->r_type = r_type;
3469 }
3470
3471 ++p->count;
3472 }
3473 break;
3474
3475 /* This relocation describes the C++ object vtable hierarchy.
3476 Reconstruct it for later use during GC. */
3477 case R_CRIS_GNU_VTINHERIT:
3478 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3479 return FALSE;
3480 break;
3481
3482 /* This relocation describes which C++ vtable entries are actually
3483 used. Record for later use during GC. */
3484 case R_CRIS_GNU_VTENTRY:
3485 BFD_ASSERT (h != NULL);
3486 if (h != NULL
3487 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3488 return FALSE;
3489 break;
3490
3491 case R_CRIS_16_TPREL:
3492 case R_CRIS_32_TPREL:
3493 /* Already warned above, when necessary. */
3494 break;
3495
3496 default:
3497 /* Other relocs do not appear here. */
3498 bfd_set_error (bfd_error_bad_value);
3499 return FALSE;
3500 }
3501 }
3502
3503 return TRUE;
3504 }
3505
3506 /* Set the sizes of the dynamic sections. */
3507
3508 static bfd_boolean
3509 elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3510 struct bfd_link_info *info)
3511 {
3512 struct elf_cris_link_hash_table * htab;
3513 bfd *dynobj;
3514 asection *s;
3515 bfd_boolean plt;
3516 bfd_boolean relocs;
3517
3518 htab = elf_cris_hash_table (info);
3519 if (htab == NULL)
3520 return FALSE;
3521
3522 dynobj = htab->root.dynobj;
3523 BFD_ASSERT (dynobj != NULL);
3524
3525 if (htab->root.dynamic_sections_created)
3526 {
3527 /* Set the contents of the .interp section to the interpreter. */
3528 if (bfd_link_executable (info) && !info->nointerp)
3529 {
3530 s = bfd_get_linker_section (dynobj, ".interp");
3531 BFD_ASSERT (s != NULL);
3532 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3533 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3534 }
3535 }
3536 else
3537 {
3538 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
3539 elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
3540 info);
3541
3542 /* We may have created entries in the .rela.got section.
3543 However, if we are not creating the dynamic sections, we will
3544 not actually use these entries. Reset the size of .rela.got,
3545 which will cause it to get stripped from the output file
3546 below. */
3547 s = htab->root.srelgot;
3548 if (s != NULL)
3549 s->size = 0;
3550 }
3551
3552 /* If this is a -Bsymbolic shared link, then we need to discard all PC
3553 relative relocs against symbols defined in a regular object. We
3554 allocated space for them in the check_relocs routine, but we will not
3555 fill them in in the relocate_section routine. We also discard space
3556 for relocs that have become for local symbols due to symbol
3557 visibility changes. For programs, we discard space for relocs for
3558 symbols not referenced by any dynamic object. */
3559 if (bfd_link_pic (info))
3560 elf_cris_link_hash_traverse (htab,
3561 elf_cris_discard_excess_dso_dynamics,
3562 info);
3563 else
3564 elf_cris_link_hash_traverse (htab,
3565 elf_cris_discard_excess_program_dynamics,
3566 info);
3567
3568 /* The check_relocs and adjust_dynamic_symbol entry points have
3569 determined the sizes of the various dynamic sections. Allocate
3570 memory for them. */
3571 plt = FALSE;
3572 relocs = FALSE;
3573 for (s = dynobj->sections; s != NULL; s = s->next)
3574 {
3575 const char *name;
3576
3577 if ((s->flags & SEC_LINKER_CREATED) == 0)
3578 continue;
3579
3580 /* It's OK to base decisions on the section name, because none
3581 of the dynobj section names depend upon the input files. */
3582 name = bfd_get_section_name (dynobj, s);
3583
3584 if (strcmp (name, ".plt") == 0)
3585 {
3586 /* Remember whether there is a PLT. */
3587 plt = s->size != 0;
3588 }
3589 else if (strcmp (name, ".got.plt") == 0)
3590 {
3591 /* The .got.plt contains the .got header as well as the
3592 actual .got.plt contents. The .got header may contain a
3593 R_CRIS_DTPMOD entry at index 3. */
3594 s->size += htab->dtpmod_refcount != 0
3595 ? 8 : 0;
3596 }
3597 else if (CONST_STRNEQ (name, ".rela"))
3598 {
3599 if (strcmp (name, ".rela.got") == 0
3600 && htab->dtpmod_refcount != 0
3601 && bfd_link_pic (info))
3602 s->size += sizeof (Elf32_External_Rela);
3603
3604 if (s->size != 0)
3605 {
3606 /* Remember whether there are any reloc sections other
3607 than .rela.plt. */
3608 if (strcmp (name, ".rela.plt") != 0)
3609 relocs = TRUE;
3610
3611 /* We use the reloc_count field as a counter if we need
3612 to copy relocs into the output file. */
3613 s->reloc_count = 0;
3614 }
3615 }
3616 else if (! CONST_STRNEQ (name, ".got")
3617 && strcmp (name, ".dynbss") != 0
3618 && s != htab->root.sdynrelro)
3619 {
3620 /* It's not one of our sections, so don't allocate space. */
3621 continue;
3622 }
3623
3624 if (s->size == 0)
3625 {
3626 /* If we don't need this section, strip it from the
3627 output file. This is mostly to handle .rela.bss and
3628 .rela.plt. We must create both sections in
3629 create_dynamic_sections, because they must be created
3630 before the linker maps input sections to output
3631 sections. The linker does that before
3632 adjust_dynamic_symbol is called, and it is that
3633 function which decides whether anything needs to go
3634 into these sections. */
3635 s->flags |= SEC_EXCLUDE;
3636 continue;
3637 }
3638
3639 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3640 continue;
3641
3642 /* Allocate memory for the section contents. We use bfd_zalloc here
3643 in case unused entries are not reclaimed before the section's
3644 contents are written out. This should not happen, but this way
3645 if it does, we will not write out garbage. For reloc sections,
3646 this will make entries have the type R_CRIS_NONE. */
3647 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3648 if (s->contents == NULL)
3649 return FALSE;
3650 }
3651
3652 if (elf_hash_table (info)->dynamic_sections_created)
3653 {
3654 /* Add some entries to the .dynamic section. We fill in the
3655 values later, in elf_cris_finish_dynamic_sections, but we
3656 must add the entries now so that we get the correct size for
3657 the .dynamic section. The DT_DEBUG entry is filled in by the
3658 dynamic linker and used by the debugger. */
3659 #define add_dynamic_entry(TAG, VAL) \
3660 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3661
3662 if (!bfd_link_pic (info))
3663 {
3664 if (!add_dynamic_entry (DT_DEBUG, 0))
3665 return FALSE;
3666 }
3667
3668 if (plt)
3669 {
3670 if (!add_dynamic_entry (DT_PLTGOT, 0)
3671 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3672 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3673 || !add_dynamic_entry (DT_JMPREL, 0))
3674 return FALSE;
3675 }
3676
3677 if (relocs)
3678 {
3679 if (!add_dynamic_entry (DT_RELA, 0)
3680 || !add_dynamic_entry (DT_RELASZ, 0)
3681 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3682 return FALSE;
3683 }
3684
3685 if ((info->flags & DF_TEXTREL) != 0)
3686 {
3687 if (!add_dynamic_entry (DT_TEXTREL, 0))
3688 return FALSE;
3689 info->flags |= DF_TEXTREL;
3690 }
3691 }
3692 #undef add_dynamic_entry
3693
3694 return TRUE;
3695 }
3696
3697 /* This function is called via elf_cris_link_hash_traverse if we are
3698 creating a shared object. In the -Bsymbolic case, it discards the
3699 space allocated to copy PC relative relocs against symbols which
3700 are defined in regular objects. For the normal non-symbolic case,
3701 we also discard space for relocs that have become local due to
3702 symbol visibility changes. We allocated space for them in the
3703 check_relocs routine, but we won't fill them in in the
3704 relocate_section routine. */
3705
3706 static bfd_boolean
3707 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *h,
3708 void * inf)
3709 {
3710 struct elf_cris_pcrel_relocs_copied *s;
3711 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3712
3713 /* If a symbol has been forced local or we have found a regular
3714 definition for the symbolic link case, then we won't be needing
3715 any relocs. */
3716 if (h->root.def_regular
3717 && (h->root.forced_local
3718 || SYMBOLIC_BIND (info, &h->root)))
3719 {
3720 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3721 {
3722 asection *sreloc
3723 = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info)
3724 ->dynobj,
3725 s->section,
3726 /*rela?*/ TRUE);
3727 sreloc->size -= s->count * sizeof (Elf32_External_Rela);
3728 }
3729 return TRUE;
3730 }
3731
3732 /* If we have accounted for PC-relative relocs for read-only
3733 sections, now is the time to warn for them. We can't do it in
3734 cris_elf_check_relocs, because we don't know the status of all
3735 symbols at that time (and it's common to force symbols local
3736 late). */
3737
3738 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3739 if ((s->section->flags & SEC_READONLY) != 0)
3740 {
3741 /* FIXME: How do we make this optionally a warning only? */
3742 _bfd_error_handler
3743 /* xgettext:c-format */
3744 (_("%B, section `%A', to symbol `%s':\n"
3745 " relocation %s should not be used"
3746 " in a shared object; recompile with -fPIC"),
3747 s->section->owner,
3748 s->section,
3749 h->root.root.root.string,
3750 cris_elf_howto_table[s->r_type].name);
3751
3752 info->flags |= DF_TEXTREL;
3753 }
3754
3755 return TRUE;
3756 }
3757
3758 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3759 creating a shared object. We discard space for relocs for symbols put
3760 in the .got, but which we found we do not have to resolve at run-time. */
3761
3762 static bfd_boolean
3763 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *h,
3764 void * inf)
3765 {
3766 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3767
3768 /* If we're not creating a shared library and have a symbol which is
3769 referred to by .got references, but the symbol is defined locally,
3770 (or rather, not defined by a DSO) then lose the reloc for the .got
3771 (don't allocate room for it). Likewise for relocs for something
3772 for which we create a PLT. */
3773 if (!h->root.def_dynamic
3774 || h->root.plt.refcount > 0)
3775 {
3776 if (h->reg_got_refcount > 0
3777 /* The size of this section is only valid and in sync with the
3778 various reference counts if we do dynamic; don't decrement it
3779 otherwise. */
3780 && elf_hash_table (info)->dynamic_sections_created)
3781 {
3782 bfd *dynobj = elf_hash_table (info)->dynobj;
3783 asection *srelgot = elf_hash_table (info)->srelgot;
3784
3785 BFD_ASSERT (dynobj != NULL);
3786 BFD_ASSERT (srelgot != NULL);
3787
3788 srelgot->size -= sizeof (Elf32_External_Rela);
3789 }
3790
3791 /* If the locally-defined symbol isn't used by a DSO, then we don't
3792 have to export it as a dynamic symbol. This was already done for
3793 functions; doing this for all symbols would presumably not
3794 introduce new problems. Of course we don't do this if we're
3795 exporting all dynamic symbols, or all data symbols, regardless of
3796 them being referenced or not. */
3797 if (! (info->export_dynamic
3798 || (h->root.type != STT_FUNC && info->dynamic_data))
3799 && h->root.dynindx != -1
3800 && !h->root.dynamic
3801 && !h->root.def_dynamic
3802 && !h->root.ref_dynamic)
3803 {
3804 h->root.dynindx = -1;
3805 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3806 h->root.dynstr_index);
3807 }
3808 }
3809
3810 return TRUE;
3811 }
3812
3813 /* Reject a file depending on presence and expectation of prefixed
3814 underscores on symbols. */
3815
3816 static bfd_boolean
3817 cris_elf_object_p (bfd *abfd)
3818 {
3819 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
3820 return FALSE;
3821
3822 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
3823 return (bfd_get_symbol_leading_char (abfd) == '_');
3824 else
3825 return (bfd_get_symbol_leading_char (abfd) == 0);
3826 }
3827
3828 /* Mark presence or absence of leading underscore. Set machine type
3829 flags from mach type. */
3830
3831 static void
3832 cris_elf_final_write_processing (bfd *abfd,
3833 bfd_boolean linker ATTRIBUTE_UNUSED)
3834 {
3835 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
3836
3837 e_flags &= ~EF_CRIS_UNDERSCORE;
3838 if (bfd_get_symbol_leading_char (abfd) == '_')
3839 e_flags |= EF_CRIS_UNDERSCORE;
3840
3841 switch (bfd_get_mach (abfd))
3842 {
3843 case bfd_mach_cris_v0_v10:
3844 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
3845 break;
3846
3847 case bfd_mach_cris_v10_v32:
3848 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
3849 break;
3850
3851 case bfd_mach_cris_v32:
3852 e_flags |= EF_CRIS_VARIANT_V32;
3853 break;
3854
3855 default:
3856 _bfd_abort (__FILE__, __LINE__,
3857 _("Unexpected machine number"));
3858 }
3859
3860 elf_elfheader (abfd)->e_flags = e_flags;
3861 }
3862
3863 /* Set the mach type from e_flags value. */
3864
3865 static bfd_boolean
3866 cris_elf_set_mach_from_flags (bfd *abfd,
3867 unsigned long flags)
3868 {
3869 switch (flags & EF_CRIS_VARIANT_MASK)
3870 {
3871 case EF_CRIS_VARIANT_ANY_V0_V10:
3872 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
3873 break;
3874
3875 case EF_CRIS_VARIANT_V32:
3876 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
3877 break;
3878
3879 case EF_CRIS_VARIANT_COMMON_V10_V32:
3880 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
3881 break;
3882
3883 default:
3884 /* Since we don't recognize them, we obviously can't support them
3885 with this code; we'd have to require that all future handling
3886 would be optional. */
3887 bfd_set_error (bfd_error_wrong_format);
3888 return FALSE;
3889 }
3890
3891 return TRUE;
3892 }
3893
3894 /* Display the flags field. */
3895
3896 static bfd_boolean
3897 cris_elf_print_private_bfd_data (bfd *abfd, void * ptr)
3898 {
3899 FILE *file = (FILE *) ptr;
3900
3901 BFD_ASSERT (abfd != NULL && ptr != NULL);
3902
3903 _bfd_elf_print_private_bfd_data (abfd, ptr);
3904
3905 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3906
3907 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
3908 fprintf (file, _(" [symbols have a _ prefix]"));
3909 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3910 == EF_CRIS_VARIANT_COMMON_V10_V32)
3911 fprintf (file, _(" [v10 and v32]"));
3912 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3913 == EF_CRIS_VARIANT_V32)
3914 fprintf (file, _(" [v32]"));
3915
3916 fputc ('\n', file);
3917 return TRUE;
3918 }
3919
3920 /* Don't mix files with and without a leading underscore. */
3921
3922 static bfd_boolean
3923 cris_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3924 {
3925 bfd *obfd = info->output_bfd;
3926 int imach, omach;
3927
3928 if (! _bfd_generic_verify_endian_match (ibfd, info))
3929 return FALSE;
3930
3931 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3932 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3933 return TRUE;
3934
3935 imach = bfd_get_mach (ibfd);
3936
3937 if (! elf_flags_init (obfd))
3938 {
3939 /* This happens when ld starts out with a 'blank' output file. */
3940 elf_flags_init (obfd) = TRUE;
3941
3942 /* We ignore the linker-set mach, and instead set it according to
3943 the first input file. This would also happen if we could
3944 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
3945 This allows us to keep the same linker config across
3946 cris(v0..v10) and crisv32. The drawback is that we can't force
3947 the output type, which might be a sane thing to do for a
3948 v10+v32 compatibility object. */
3949 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3950 return FALSE;
3951 }
3952
3953 if (bfd_get_symbol_leading_char (ibfd)
3954 != bfd_get_symbol_leading_char (obfd))
3955 {
3956 _bfd_error_handler
3957 (bfd_get_symbol_leading_char (ibfd) == '_'
3958 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
3959 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
3960 ibfd);
3961 bfd_set_error (bfd_error_bad_value);
3962 return FALSE;
3963 }
3964
3965 omach = bfd_get_mach (obfd);
3966
3967 if (imach != omach)
3968 {
3969 /* We can get an incompatible combination only if either is
3970 bfd_mach_cris_v32, and the other one isn't compatible. */
3971 if ((imach == bfd_mach_cris_v32
3972 && omach != bfd_mach_cris_v10_v32)
3973 || (omach == bfd_mach_cris_v32
3974 && imach != bfd_mach_cris_v10_v32))
3975 {
3976 _bfd_error_handler
3977 ((imach == bfd_mach_cris_v32)
3978 ? _("%B contains CRIS v32 code, incompatible"
3979 " with previous objects")
3980 : _("%B contains non-CRIS-v32 code, incompatible"
3981 " with previous objects"),
3982 ibfd);
3983 bfd_set_error (bfd_error_bad_value);
3984 return FALSE;
3985 }
3986
3987 /* We don't have to check the case where the input is compatible
3988 with v10 and v32, because the output is already known to be set
3989 to the other (compatible) mach. */
3990 if (omach == bfd_mach_cris_v10_v32
3991 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3992 return FALSE;
3993 }
3994
3995 return TRUE;
3996 }
3997
3998 /* Do side-effects of e_flags copying to obfd. */
3999
4000 static bfd_boolean
4001 cris_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4002 {
4003 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4004 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4005 return TRUE;
4006
4007 /* Call the base function. */
4008 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
4009 return FALSE;
4010
4011 /* Do what we really came here for. */
4012 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
4013 }
4014
4015 static enum elf_reloc_type_class
4016 elf_cris_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4017 const asection *rel_sec ATTRIBUTE_UNUSED,
4018 const Elf_Internal_Rela *rela)
4019 {
4020 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
4021 switch (r_type)
4022 {
4023 case R_CRIS_RELATIVE:
4024 return reloc_class_relative;
4025 case R_CRIS_JUMP_SLOT:
4026 return reloc_class_plt;
4027 case R_CRIS_COPY:
4028 return reloc_class_copy;
4029 default:
4030 return reloc_class_normal;
4031 }
4032 }
4033
4034 /* The elf_backend_got_elt_size worker. For one symbol, we can have up to
4035 two GOT entries from three types with two different sizes. We handle
4036 it as a single entry, so we can use the regular offset-calculation
4037 machinery. */
4038
4039 static bfd_vma
4040 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
4041 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4042 struct elf_link_hash_entry *hr,
4043 bfd *ibfd,
4044 unsigned long symndx)
4045 {
4046 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4047 bfd_vma eltsiz = 0;
4048
4049 /* We may have one regular GOT entry or up to two TLS GOT
4050 entries. */
4051 if (h == NULL)
4052 {
4053 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4054 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4055
4056 BFD_ASSERT (local_got_refcounts != NULL);
4057
4058 if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4059 {
4060 /* We can't have a variable referred to both as a regular
4061 variable and through TLS relocs. */
4062 BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4063 && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4064 return 4;
4065 }
4066
4067 if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4068 eltsiz += 8;
4069
4070 if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4071 eltsiz += 4;
4072 }
4073 else
4074 {
4075 struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4076 if (hh->reg_got_refcount > 0)
4077 {
4078 /* The actual error-on-input is emitted elsewhere. */
4079 BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4080 return 4;
4081 }
4082
4083 if (hh->dtp_refcount > 0)
4084 eltsiz += 8;
4085
4086 if (hh->tprel_refcount > 0)
4087 eltsiz += 4;
4088 }
4089
4090 /* We're only called when h->got.refcount is non-zero, so we must
4091 have a non-zero size. */
4092 BFD_ASSERT (eltsiz != 0);
4093 return eltsiz;
4094 }
4095 \f
4096 #define ELF_ARCH bfd_arch_cris
4097 #define ELF_TARGET_ID CRIS_ELF_DATA
4098 #define ELF_MACHINE_CODE EM_CRIS
4099 #define ELF_MAXPAGESIZE 0x2000
4100
4101 #define TARGET_LITTLE_SYM cris_elf32_vec
4102 #define TARGET_LITTLE_NAME "elf32-cris"
4103 #define elf_symbol_leading_char 0
4104
4105 #define elf_info_to_howto_rel NULL
4106 #define elf_info_to_howto cris_info_to_howto_rela
4107 #define elf_backend_relocate_section cris_elf_relocate_section
4108 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
4109 #define elf_backend_plt_sym_val cris_elf_plt_sym_val
4110 #define elf_backend_check_relocs cris_elf_check_relocs
4111 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
4112 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
4113
4114 #define elf_backend_can_gc_sections 1
4115 #define elf_backend_can_refcount 1
4116
4117 #define elf_backend_object_p cris_elf_object_p
4118 #define elf_backend_final_write_processing \
4119 cris_elf_final_write_processing
4120 #define bfd_elf32_bfd_print_private_bfd_data \
4121 cris_elf_print_private_bfd_data
4122 #define bfd_elf32_bfd_merge_private_bfd_data \
4123 cris_elf_merge_private_bfd_data
4124 #define bfd_elf32_bfd_copy_private_bfd_data \
4125 cris_elf_copy_private_bfd_data
4126
4127 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
4128 #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
4129
4130 #define bfd_elf32_bfd_link_hash_table_create \
4131 elf_cris_link_hash_table_create
4132 #define elf_backend_adjust_dynamic_symbol \
4133 elf_cris_adjust_dynamic_symbol
4134 #define elf_backend_copy_indirect_symbol \
4135 elf_cris_copy_indirect_symbol
4136 #define elf_backend_size_dynamic_sections \
4137 elf_cris_size_dynamic_sections
4138 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4139 #define elf_backend_finish_dynamic_symbol \
4140 elf_cris_finish_dynamic_symbol
4141 #define elf_backend_finish_dynamic_sections \
4142 elf_cris_finish_dynamic_sections
4143 #define elf_backend_create_dynamic_sections \
4144 _bfd_elf_create_dynamic_sections
4145 #define bfd_elf32_bfd_final_link \
4146 bfd_elf_gc_common_final_link
4147 #define elf_backend_hide_symbol elf_cris_hide_symbol
4148 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
4149
4150 #define elf_backend_want_got_plt 1
4151 #define elf_backend_plt_readonly 1
4152 #define elf_backend_want_plt_sym 0
4153 #define elf_backend_got_header_size 12
4154 #define elf_backend_got_elt_size elf_cris_got_elt_size
4155 #define elf_backend_dtrel_excludes_plt 1
4156 #define elf_backend_want_dynrelro 1
4157
4158 /* Later, we my want to optimize RELA entries into REL entries for dynamic
4159 linking and libraries (if it's a win of any significance). Until then,
4160 take the easy route. */
4161 #define elf_backend_may_use_rel_p 0
4162 #define elf_backend_may_use_rela_p 1
4163 #define elf_backend_rela_normal 1
4164
4165 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4166
4167 #include "elf32-target.h"
4168
4169 #undef TARGET_LITTLE_SYM
4170 #undef TARGET_LITTLE_NAME
4171 #undef elf_symbol_leading_char
4172
4173 #define TARGET_LITTLE_SYM cris_elf32_us_vec
4174 #define TARGET_LITTLE_NAME "elf32-us-cris"
4175 #define elf_symbol_leading_char '_'
4176 #undef elf32_bed
4177 #define elf32_bed elf32_us_cris_bed
4178
4179 #include "elf32-target.h"
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