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[thirdparty/binutils-gdb.git] / bfd / elf32-cris.c
1 /* CRIS-specific support for 32-bit ELF.
2 Copyright (C) 2000-2021 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 bfd_boolean
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 (_("%pB: unsupported relocation type %#x"),
468 abfd, r_type);
469 bfd_set_error (bfd_error_bad_value);
470 return FALSE;
471 }
472 cache_ptr->howto = & cris_elf_howto_table [r_type];
473 return TRUE;
474 }
475
476 bfd_reloc_status_type
477 cris_elf_pcrel_reloc (bfd *abfd ATTRIBUTE_UNUSED,
478 arelent *reloc_entry,
479 asymbol *symbol,
480 void * data ATTRIBUTE_UNUSED,
481 asection *input_section,
482 bfd *output_bfd,
483 char **error_message ATTRIBUTE_UNUSED)
484 {
485 /* By default (using only bfd_elf_generic_reloc when linking to
486 non-ELF formats) PC-relative relocs are relative to the beginning
487 of the reloc. CRIS PC-relative relocs are relative to the position
488 *after* the reloc because that's what pre-CRISv32 PC points to
489 after reading an insn field with that reloc. (For CRISv32, PC is
490 actually relative to the start of the insn, but we keep the old
491 definition.) Still, we use as much generic machinery as we can.
492
493 Only adjust when doing a final link. */
494 if (output_bfd == (bfd *) NULL)
495 reloc_entry->addend -= 1 << reloc_entry->howto->size;
496
497 return
498 bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
499 input_section, output_bfd, error_message);
500 }
501 \f
502 /* Support for core dump NOTE sections.
503 The slightly unintuitive code layout is an attempt to keep at least
504 some similarities with other ports, hoping to simplify general
505 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
506
507 static bfd_boolean
508 cris_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
509 {
510 int offset;
511 size_t size;
512
513 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
514 switch (note->descsz)
515 {
516 default:
517 return FALSE;
518
519 case 202: /* Linux/CRISv32 */
520 /* pr_cursig */
521 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
522
523 /* pr_pid */
524 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
525
526 /* pr_reg */
527 offset = 70;
528 size = 128;
529
530 break;
531 }
532 else
533 switch (note->descsz)
534 {
535 default:
536 return FALSE;
537
538 case 214: /* Linux/CRIS */
539 /* pr_cursig */
540 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
541
542 /* pr_pid */
543 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
544
545 /* pr_reg */
546 offset = 70;
547 size = 140;
548
549 break;
550 }
551
552 /* Make a ".reg/999" section. */
553 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
554 size, note->descpos + offset);
555 }
556
557 static bfd_boolean
558 cris_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
559 {
560 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
561 switch (note->descsz)
562 {
563 default:
564 return FALSE;
565
566 case 124: /* Linux/CRISv32 elf_prpsinfo */
567 elf_tdata (abfd)->core->program
568 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
569 elf_tdata (abfd)->core->command
570 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
571 }
572 else
573 switch (note->descsz)
574 {
575 default:
576 return FALSE;
577
578 case 124: /* Linux/CRIS elf_prpsinfo */
579 elf_tdata (abfd)->core->program
580 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
581 elf_tdata (abfd)->core->command
582 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
583 }
584
585 /* Note that for some reason, a spurious space is tacked
586 onto the end of the args in some (at least one anyway)
587 implementations, so strip it off if it exists. */
588
589 {
590 char *command = elf_tdata (abfd)->core->command;
591 int n = strlen (command);
592
593 if (0 < n && command[n - 1] == ' ')
594 command[n - 1] = '\0';
595 }
596
597 return TRUE;
598 }
599 \f
600 /* The name of the dynamic interpreter. This is put in the .interp
601 section. */
602
603 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
604
605 /* The size in bytes of an entry in the procedure linkage table. */
606
607 #define PLT_ENTRY_SIZE 20
608 #define PLT_ENTRY_SIZE_V32 26
609
610 /* The first entry in an absolute procedure linkage table looks like this. */
611
612 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
613 {
614 0xfc, 0xe1,
615 0x7e, 0x7e, /* push mof. */
616 0x7f, 0x0d, /* (dip [pc+]) */
617 0, 0, 0, 0, /* Replaced with address of .got + 4. */
618 0x30, 0x7a, /* move [...],mof */
619 0x7f, 0x0d, /* (dip [pc+]) */
620 0, 0, 0, 0, /* Replaced with address of .got + 8. */
621 0x30, 0x09 /* jump [...] */
622 };
623
624 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
625 {
626 0x84, 0xe2, /* subq 4,$sp */
627 0x6f, 0xfe, /* move.d 0,$acr */
628 0, 0, 0, 0, /* Replaced by address of .got + 4. */
629 0x7e, 0x7a, /* move $mof,[$sp] */
630 0x3f, 0x7a, /* move [$acr],$mof */
631 0x04, 0xf2, /* addq 4,acr */
632 0x6f, 0xfa, /* move.d [$acr],$acr */
633 0xbf, 0x09, /* jump $acr */
634 0xb0, 0x05, /* nop */
635 0, 0 /* Pad out to 26 bytes. */
636 };
637
638 /* Subsequent entries in an absolute procedure linkage table look like
639 this. */
640
641 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
642 {
643 0x7f, 0x0d, /* (dip [pc+]) */
644 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
645 0x30, 0x09, /* jump [...] */
646 0x3f, 0x7e, /* move [pc+],mof */
647 0, 0, 0, 0, /* Replaced with offset into relocation table. */
648 0x2f, 0xfe, /* add.d [pc+],pc */
649 0xec, 0xff,
650 0xff, 0xff /* Replaced with offset to start of .plt. */
651 };
652
653 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
654 {
655 0x6f, 0xfe, /* move.d 0,$acr */
656 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
657 0x6f, 0xfa, /* move.d [$acr],$acr */
658 0xbf, 0x09, /* jump $acr */
659 0xb0, 0x05, /* nop */
660 0x3f, 0x7e, /* move 0,mof */
661 0, 0, 0, 0, /* Replaced with offset into relocation table. */
662 0xbf, 0x0e, /* ba start_of_plt0_entry */
663 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
664 0xb0, 0x05 /* nop */
665 };
666
667 /* The first entry in a PIC procedure linkage table looks like this. */
668
669 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
670 {
671 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
672 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
673 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
674 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
675 };
676
677 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
678 {
679 0x84, 0xe2, /* subq 4,$sp */
680 0x04, 0x01, /* addoq 4,$r0,$acr */
681 0x7e, 0x7a, /* move $mof,[$sp] */
682 0x3f, 0x7a, /* move [$acr],$mof */
683 0x04, 0xf2, /* addq 4,$acr */
684 0x6f, 0xfa, /* move.d [$acr],$acr */
685 0xbf, 0x09, /* jump $acr */
686 0xb0, 0x05, /* nop */
687 0, 0, /* Pad out to 26 bytes. */
688 0, 0, 0, 0,
689 0, 0, 0, 0
690 };
691
692 /* Subsequent entries in a PIC procedure linkage table look like this. */
693
694 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
695 {
696 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
697 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
698 0x30, 0x09, /* jump [...] */
699 0x3f, 0x7e, /* move [pc+],mof */
700 0, 0, 0, 0, /* Replaced with offset into relocation table. */
701 0x2f, 0xfe, /* add.d [pc+],pc */
702 0xec, 0xff, /* Replaced with offset to start of .plt. */
703 0xff, 0xff
704 };
705
706 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
707 {
708 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
709 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
710 0x6f, 0xfa, /* move.d [$acr],$acr */
711 0xbf, 0x09, /* jump $acr */
712 0xb0, 0x05, /* nop */
713 0x3f, 0x7e, /* move relocoffs,$mof */
714 0, 0, 0, 0, /* Replaced with offset into relocation table. */
715 0xbf, 0x0e, /* ba start_of_plt */
716 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
717 0xb0, 0x05 /* nop */
718 };
719 \f
720 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
721 (and most other PIC/shlib stuff). Check that we don't drift away
722 without reason.
723
724 The CRIS linker, like the m68k and i386 linkers (and probably the rest
725 too) needs to keep track of the number of relocs that it decides to
726 copy in check_relocs for each symbol. This is so that it can discard
727 PC relative relocs if it doesn't need them when linking with
728 -Bsymbolic. We store the information in a field extending the regular
729 ELF linker hash table. */
730
731 /* This structure keeps track of the number of PC relative relocs we have
732 copied for a given symbol. */
733
734 struct elf_cris_pcrel_relocs_copied
735 {
736 /* Next section. */
737 struct elf_cris_pcrel_relocs_copied *next;
738
739 /* A section in dynobj. */
740 asection *section;
741
742 /* Number of relocs copied in this section. */
743 bfd_size_type count;
744
745 /* Example of reloc being copied, for message. */
746 enum elf_cris_reloc_type r_type;
747 };
748
749 /* CRIS ELF linker hash entry. */
750
751 struct elf_cris_link_hash_entry
752 {
753 struct elf_link_hash_entry root;
754
755 /* Number of PC relative relocs copied for this symbol. */
756 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
757
758 /* The GOTPLT references are CRIS-specific; the goal is to avoid having
759 both a general GOT and a PLT-specific GOT entry for the same symbol,
760 when it is referenced both as a function and as a function pointer.
761
762 Number of GOTPLT references for a function. */
763 bfd_signed_vma gotplt_refcount;
764
765 /* Actual GOTPLT index for this symbol, if applicable, or zero if not
766 (zero is never used as an index). FIXME: We should be able to fold
767 this with gotplt_refcount in a union, like the got and plt unions in
768 elf_link_hash_entry. */
769 bfd_size_type gotplt_offset;
770
771 /* The root.got.refcount is the sum of the regular reference counts
772 (this) and those members below. We have to keep a separate count
773 to track when we've found the first (or last) reference to a
774 regular got entry. The offset is in root.got.offset. */
775 bfd_signed_vma reg_got_refcount;
776
777 /* Similar to the above, the number of reloc references to this
778 symbols that need a R_CRIS_32_TPREL slot. The offset is in
779 root.got.offset, because this and .dtp_refcount can't validly
780 happen when there's also a regular GOT entry; that's invalid
781 input for which an error is emitted. */
782 bfd_signed_vma tprel_refcount;
783
784 /* Similar to the above, the number of reloc references to this
785 symbols that need a R_CRIS_DTP slot. The offset is in
786 root.got.offset; plus 4 if .tprel_refcount > 0. */
787 bfd_signed_vma dtp_refcount;
788 };
789
790 static bfd_boolean
791 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *,
792 void * );
793 static bfd_boolean
794 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *,
795 void *);
796
797 /* The local_got_refcounts and local_got_offsets are a multiple of
798 LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
799 refcount for GOT itself, see code), with the summary / group offset
800 for local symbols located at offset N, reference counts for
801 ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
802 relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
803 3*LSNUM. */
804
805 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
806 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
807 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
808 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
809
810 /* CRIS ELF linker hash table. */
811
812 struct elf_cris_link_hash_table
813 {
814 struct elf_link_hash_table root;
815
816 /* We can't use the PLT offset and calculate to get the GOTPLT offset,
817 since we try and avoid creating GOTPLT:s when there's already a GOT.
818 Instead, we keep and update the next available index here. */
819 bfd_size_type next_gotplt_entry;
820
821 /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
822 been seen for any input; if != 0, then the constant-offset
823 R_CRIS_DTPMOD is needed for this DSO/executable. This turns
824 negative at relocation, so that we don't need an extra flag for
825 when the reloc is output. */
826 bfd_signed_vma dtpmod_refcount;
827 };
828
829 /* Traverse a CRIS ELF linker hash table. */
830
831 #define elf_cris_link_hash_traverse(table, func, info) \
832 (elf_link_hash_traverse \
833 (&(table)->root, \
834 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
835 (info)))
836
837 /* Get the CRIS ELF linker hash table from a link_info structure. */
838
839 #define elf_cris_hash_table(p) \
840 ((is_elf_hash_table ((p)->hash) \
841 && elf_hash_table_id (elf_hash_table (p)) == CRIS_ELF_DATA) \
842 ? (struct elf_cris_link_hash_table *) (p)->hash : NULL)
843
844 /* Get the CRIS ELF linker hash entry from a regular hash entry (the
845 "parent class"). The .root reference is just a simple type
846 check on the argument. */
847
848 #define elf_cris_hash_entry(p) \
849 ((struct elf_cris_link_hash_entry *) (&(p)->root))
850
851 /* Create an entry in a CRIS ELF linker hash table. */
852
853 static struct bfd_hash_entry *
854 elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry,
855 struct bfd_hash_table *table,
856 const char *string)
857 {
858 struct elf_cris_link_hash_entry *ret =
859 (struct elf_cris_link_hash_entry *) entry;
860
861 /* Allocate the structure if it has not already been allocated by a
862 subclass. */
863 if (ret == (struct elf_cris_link_hash_entry *) NULL)
864 ret = ((struct elf_cris_link_hash_entry *)
865 bfd_hash_allocate (table,
866 sizeof (struct elf_cris_link_hash_entry)));
867 if (ret == (struct elf_cris_link_hash_entry *) NULL)
868 return (struct bfd_hash_entry *) ret;
869
870 /* Call the allocation method of the superclass. */
871 ret = ((struct elf_cris_link_hash_entry *)
872 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
873 table, string));
874 if (ret != (struct elf_cris_link_hash_entry *) NULL)
875 {
876 ret->pcrel_relocs_copied = NULL;
877 ret->gotplt_refcount = 0;
878 ret->gotplt_offset = 0;
879 ret->dtp_refcount = 0;
880 ret->tprel_refcount = 0;
881 ret->reg_got_refcount = 0;
882 }
883
884 return (struct bfd_hash_entry *) ret;
885 }
886
887 /* Create a CRIS ELF linker hash table. */
888
889 static struct bfd_link_hash_table *
890 elf_cris_link_hash_table_create (bfd *abfd)
891 {
892 struct elf_cris_link_hash_table *ret;
893 size_t amt = sizeof (struct elf_cris_link_hash_table);
894
895 ret = ((struct elf_cris_link_hash_table *) bfd_zmalloc (amt));
896 if (ret == (struct elf_cris_link_hash_table *) NULL)
897 return NULL;
898
899 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
900 elf_cris_link_hash_newfunc,
901 sizeof (struct elf_cris_link_hash_entry),
902 CRIS_ELF_DATA))
903 {
904 free (ret);
905 return NULL;
906 }
907
908 /* Initialize to skip over the first three entries in the gotplt; they
909 are used for run-time symbol evaluation. */
910 ret->next_gotplt_entry = 12;
911
912 return &ret->root.root;
913 }
914 \f
915 /* Perform a single relocation. By default we use the standard BFD
916 routines, with a few tweaks. */
917
918 static bfd_reloc_status_type
919 cris_final_link_relocate (reloc_howto_type * howto,
920 bfd * input_bfd,
921 asection * input_section,
922 bfd_byte * contents,
923 Elf_Internal_Rela * rel,
924 bfd_vma relocation)
925 {
926 bfd_reloc_status_type r;
927 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
928
929 /* PC-relative relocations are relative to the position *after*
930 the reloc. Note that for R_CRIS_8_PCREL the adjustment is
931 not a single byte, since PC must be 16-bit-aligned. */
932 switch (r_type)
933 {
934 /* Check that the 16-bit GOT relocs are positive. */
935 case R_CRIS_16_GOTPLT:
936 case R_CRIS_16_GOT:
937 if ((bfd_signed_vma) relocation < 0)
938 return bfd_reloc_overflow;
939 break;
940
941 case R_CRIS_32_PLT_PCREL:
942 case R_CRIS_32_PCREL:
943 relocation -= 2;
944 /* Fall through. */
945 case R_CRIS_8_PCREL:
946 case R_CRIS_16_PCREL:
947 relocation -= 2;
948 break;
949
950 default:
951 break;
952 }
953
954 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
955 contents, rel->r_offset,
956 relocation, rel->r_addend);
957 return r;
958 }
959 \f
960
961 /* The number of errors left before we stop outputting reloc-specific
962 explanatory messages. By coincidence, this works nicely together
963 with the default number of messages you'll get from LD about
964 "relocation truncated to fit" messages before you get an
965 "additional relocation overflows omitted from the output". */
966 static int additional_relocation_error_msg_count = 10;
967
968 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
969 copied, for further comments. */
970
971 static bfd_boolean
972 cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
973 struct bfd_link_info *info,
974 bfd *input_bfd,
975 asection *input_section,
976 bfd_byte *contents,
977 Elf_Internal_Rela *relocs,
978 Elf_Internal_Sym *local_syms,
979 asection **local_sections)
980 {
981 struct elf_cris_link_hash_table * htab;
982 bfd *dynobj;
983 Elf_Internal_Shdr *symtab_hdr;
984 struct elf_link_hash_entry **sym_hashes;
985 bfd_vma *local_got_offsets;
986 asection *sgot;
987 asection *splt;
988 asection *sreloc;
989 Elf_Internal_Rela *rel;
990 Elf_Internal_Rela *relend;
991 asection *srelgot;
992
993 htab = elf_cris_hash_table (info);
994 if (htab == NULL)
995 return FALSE;
996
997 dynobj = htab->root.dynobj;
998 local_got_offsets = elf_local_got_offsets (input_bfd);
999 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1000 sym_hashes = elf_sym_hashes (input_bfd);
1001 relend = relocs + input_section->reloc_count;
1002
1003 sgot = NULL;
1004 splt = NULL;
1005 sreloc = NULL;
1006 srelgot = NULL;
1007
1008 if (dynobj != NULL)
1009 {
1010 splt = htab->root.splt;
1011 sgot = htab->root.sgot;
1012 }
1013
1014 for (rel = relocs; rel < relend; rel ++)
1015 {
1016 reloc_howto_type *howto;
1017 unsigned long r_symndx;
1018 Elf_Internal_Sym *sym;
1019 asection *sec;
1020 struct elf_link_hash_entry *h;
1021 bfd_vma relocation;
1022 bfd_reloc_status_type r;
1023 const char *symname = NULL;
1024 enum elf_cris_reloc_type r_type;
1025 bfd_boolean resolved_to_zero;
1026
1027 r_type = ELF32_R_TYPE (rel->r_info);
1028
1029 if ( r_type == R_CRIS_GNU_VTINHERIT
1030 || r_type == R_CRIS_GNU_VTENTRY)
1031 continue;
1032
1033 r_symndx = ELF32_R_SYM (rel->r_info);
1034 howto = cris_elf_howto_table + r_type;
1035 h = NULL;
1036 sym = NULL;
1037 sec = NULL;
1038
1039 if (r_symndx < symtab_hdr->sh_info)
1040 {
1041 sym = local_syms + r_symndx;
1042 sec = local_sections [r_symndx];
1043 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1044
1045 symname = (bfd_elf_string_from_elf_section
1046 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1047 if (symname == NULL)
1048 symname = bfd_section_name (sec);
1049 }
1050 else
1051 {
1052 bfd_boolean warned, ignored;
1053 bfd_boolean unresolved_reloc;
1054
1055 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1056 r_symndx, symtab_hdr, sym_hashes,
1057 h, sec, relocation,
1058 unresolved_reloc, warned, ignored);
1059
1060 symname = h->root.root.string;
1061
1062 if (unresolved_reloc
1063 /* Perhaps we should detect the cases that
1064 sec->output_section is expected to be NULL like i386 and
1065 m68k, but apparently (and according to elfxx-ia64.c) all
1066 valid cases are where the symbol is defined in a shared
1067 object which we link dynamically against. This includes
1068 PLT relocs for which we've created a PLT entry and other
1069 relocs for which we're prepared to create dynamic
1070 relocations.
1071
1072 For now, new situations cause us to just err when
1073 sec->output_offset is NULL but the object with the symbol
1074 is *not* dynamically linked against. Thus this will
1075 automatically remind us so we can see if there are other
1076 valid cases we need to revisit. */
1077 && (sec->owner->flags & DYNAMIC) != 0)
1078 relocation = 0;
1079
1080 else if (h->root.type == bfd_link_hash_defined
1081 || h->root.type == bfd_link_hash_defweak)
1082 {
1083 /* Here follow the cases where the relocation value must
1084 be zero (or when further handling is simplified when
1085 zero). I can't claim to understand the various
1086 conditions and they weren't described in the files
1087 where I copied them from (elf32-m68k.c and
1088 elf32-i386.c), but let's mention examples of where
1089 they happen. FIXME: Perhaps define and use a
1090 dynamic_symbol_p function like ia64.
1091
1092 - When creating a shared library, we can have an
1093 ordinary relocation for a symbol defined in a shared
1094 library (perhaps the one we create). We then make
1095 the relocation value zero, as the value seen now will
1096 be added into the relocation addend in this shared
1097 library, but must be handled only at dynamic-link
1098 time. FIXME: Not sure this example covers the
1099 h->elf_link_hash_flags test, though it's there in
1100 other targets. */
1101 if (bfd_link_pic (info)
1102 && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1)
1103 || !h->def_regular)
1104 && (input_section->flags & SEC_ALLOC) != 0
1105 && (r_type == R_CRIS_8
1106 || r_type == R_CRIS_16
1107 || r_type == R_CRIS_32
1108 || r_type == R_CRIS_8_PCREL
1109 || r_type == R_CRIS_16_PCREL
1110 || r_type == R_CRIS_32_PCREL))
1111 relocation = 0;
1112 else if (!bfd_link_relocatable (info) && unresolved_reloc
1113 && (_bfd_elf_section_offset (output_bfd, info,
1114 input_section,
1115 rel->r_offset)
1116 != (bfd_vma) -1))
1117 {
1118 _bfd_error_handler
1119 /* xgettext:c-format */
1120 (_("%pB, section %pA: unresolvable relocation %s against symbol `%s'"),
1121 input_bfd,
1122 input_section,
1123 cris_elf_howto_table[r_type].name,
1124 symname);
1125 bfd_set_error (bfd_error_bad_value);
1126 return FALSE;
1127 }
1128 }
1129 }
1130
1131 if (sec != NULL && discarded_section (sec))
1132 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1133 rel, 1, relend, howto, 0, contents);
1134
1135 if (bfd_link_relocatable (info))
1136 continue;
1137
1138 resolved_to_zero = (h != NULL
1139 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
1140
1141 switch (r_type)
1142 {
1143 case R_CRIS_16_GOTPLT:
1144 case R_CRIS_32_GOTPLT:
1145 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1146 but we require a PLT, and the PLT handling will take care of
1147 filling in the PLT-specific GOT entry. For the GOT offset,
1148 calculate it as we do when filling it in for the .got.plt
1149 section. If we don't have a PLT, punt to GOT handling. */
1150 if (h != NULL
1151 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1152 {
1153 asection *sgotplt = htab->root.sgotplt;
1154 bfd_vma got_offset;
1155
1156 BFD_ASSERT (h->dynindx != -1);
1157 BFD_ASSERT (sgotplt != NULL);
1158
1159 got_offset
1160 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1161
1162 relocation = got_offset;
1163 break;
1164 }
1165
1166 /* We didn't make a PLT entry for this symbol. Maybe everything is
1167 folded into the GOT. Other than folding, this happens when
1168 statically linking PIC code, or when using -Bsymbolic. Check
1169 that we instead have a GOT entry as done for us by
1170 elf_cris_adjust_dynamic_symbol, and drop through into the
1171 ordinary GOT cases. This must not happen for the
1172 executable, because any reference it does to a function
1173 that is satisfied by a DSO must generate a PLT. We assume
1174 these call-specific relocs don't address non-functions. */
1175 if (h != NULL
1176 && (h->got.offset == (bfd_vma) -1
1177 || (!bfd_link_pic (info)
1178 && !(h->def_regular
1179 || (!h->def_dynamic
1180 && h->root.type == bfd_link_hash_undefweak)))))
1181 {
1182 _bfd_error_handler
1183 ((h->got.offset == (bfd_vma) -1)
1184 /* xgettext:c-format */
1185 ? _("%pB, section %pA: no PLT nor GOT for relocation %s"
1186 " against symbol `%s'")
1187 /* xgettext:c-format */
1188 : _("%pB, section %pA: no PLT for relocation %s"
1189 " against symbol `%s'"),
1190 input_bfd,
1191 input_section,
1192 cris_elf_howto_table[r_type].name,
1193 (symname != NULL && symname[0] != '\0'
1194 ? symname : _("[whose name is lost]")));
1195
1196 /* FIXME: Perhaps blaming input is not the right thing to
1197 do; this is probably an internal error. But it is true
1198 that we didn't like that particular input. */
1199 bfd_set_error (bfd_error_bad_value);
1200 return FALSE;
1201 }
1202 /* Fall through. */
1203
1204 /* The size of the actual relocation is not used here; we only
1205 fill in the GOT table here. */
1206 case R_CRIS_16_GOT:
1207 case R_CRIS_32_GOT:
1208 {
1209 bfd_vma off;
1210
1211 /* Note that despite using RELA relocations, the .got contents
1212 is always filled in with the link-relative relocation
1213 value; the addend. */
1214
1215 if (h != NULL)
1216 {
1217 off = h->got.offset;
1218 BFD_ASSERT (off != (bfd_vma) -1);
1219
1220 if (!elf_hash_table (info)->dynamic_sections_created
1221 || (! bfd_link_pic (info)
1222 && (h->def_regular
1223 || h->type == STT_FUNC
1224 || h->needs_plt))
1225 || (bfd_link_pic (info)
1226 && (SYMBOLIC_BIND (info, h) || h->dynindx == -1)
1227 && h->def_regular))
1228 {
1229 /* This wasn't checked above for ! bfd_link_pic (info), but
1230 must hold there if we get here; the symbol must
1231 be defined in the regular program or be undefweak
1232 or be a function or otherwise need a PLT. */
1233 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1234 || bfd_link_pic (info)
1235 || h->def_regular
1236 || h->type == STT_FUNC
1237 || h->needs_plt
1238 || h->root.type == bfd_link_hash_undefweak);
1239
1240 /* This is actually a static link, or it is a
1241 -Bsymbolic link and the symbol is defined locally,
1242 or is undefweak, or the symbol was forced to be
1243 local because of a version file, or we're not
1244 creating a dynamic object. We must initialize this
1245 entry in the global offset table. Since the offset
1246 must always be a multiple of 4, we use the least
1247 significant bit to record whether we have
1248 initialized it already.
1249
1250 If this GOT entry should be runtime-initialized, we
1251 will create a .rela.got relocation entry to
1252 initialize the value. This is done in the
1253 finish_dynamic_symbol routine. */
1254 if ((off & 1) != 0)
1255 off &= ~1;
1256 else
1257 {
1258 bfd_put_32 (output_bfd, relocation,
1259 sgot->contents + off);
1260 h->got.offset |= 1;
1261 }
1262 }
1263 }
1264 else
1265 {
1266 BFD_ASSERT (local_got_offsets != NULL
1267 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1268
1269 off = local_got_offsets[r_symndx];
1270
1271 /* The offset must always be a multiple of 4. We use
1272 the least significant bit to record whether we have
1273 already generated the necessary reloc. */
1274 if ((off & 1) != 0)
1275 off &= ~1;
1276 else
1277 {
1278 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1279
1280 if (bfd_link_pic (info))
1281 {
1282 Elf_Internal_Rela outrel;
1283 bfd_byte *loc;
1284
1285 srelgot = htab->root.srelgot;
1286 BFD_ASSERT (srelgot != NULL);
1287
1288 outrel.r_offset = (sgot->output_section->vma
1289 + sgot->output_offset
1290 + off);
1291 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1292 outrel.r_addend = relocation;
1293 loc = srelgot->contents;
1294 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1295 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1296 }
1297
1298 local_got_offsets[r_symndx] |= 1;
1299 }
1300 }
1301
1302 relocation = sgot->output_offset + off;
1303 if (rel->r_addend != 0)
1304 {
1305 /* We can't do anything for a relocation which is against
1306 a symbol *plus offset*. GOT holds relocations for
1307 symbols. Make this an error; the compiler isn't
1308 allowed to pass us these kinds of things. */
1309 if (h == NULL)
1310 _bfd_error_handler
1311 /* xgettext:c-format */
1312 (_("%pB, section %pA: relocation %s with non-zero addend"
1313 " %" PRId64 " against local symbol"),
1314 input_bfd,
1315 input_section,
1316 cris_elf_howto_table[r_type].name,
1317 (int64_t) rel->r_addend);
1318 else
1319 _bfd_error_handler
1320 /* xgettext:c-format */
1321 (_("%pB, section %pA: relocation %s with non-zero addend"
1322 " %" PRId64 " against symbol `%s'"),
1323 input_bfd,
1324 input_section,
1325 cris_elf_howto_table[r_type].name,
1326 (int64_t) rel->r_addend,
1327 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1328
1329 bfd_set_error (bfd_error_bad_value);
1330 return FALSE;
1331 }
1332 }
1333 break;
1334
1335 case R_CRIS_32_GOTREL:
1336 /* This relocation must only be performed against local symbols.
1337 It's also ok when we link a program and the symbol is either
1338 defined in an ordinary (non-DSO) object or is undefined weak. */
1339 if (h != NULL
1340 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1341 && !(!bfd_link_pic (info)
1342 && (h->def_regular
1343 || (!h->def_dynamic
1344 && h->root.type == bfd_link_hash_undefweak))))
1345 {
1346 _bfd_error_handler
1347 /* xgettext:c-format */
1348 (_("%pB, section %pA: relocation %s is"
1349 " not allowed for global symbol: `%s'"),
1350 input_bfd,
1351 input_section,
1352 cris_elf_howto_table[r_type].name,
1353 symname);
1354 bfd_set_error (bfd_error_bad_value);
1355 return FALSE;
1356 }
1357
1358 /* This can happen if we get a link error with the input ELF
1359 variant mismatching the output variant. Emit an error so
1360 it's noticed if it happens elsewhere. */
1361 if (sgot == NULL)
1362 {
1363 _bfd_error_handler
1364 /* xgettext:c-format */
1365 (_("%pB, section %pA: relocation %s with no GOT created"),
1366 input_bfd,
1367 input_section,
1368 cris_elf_howto_table[r_type].name);
1369 bfd_set_error (bfd_error_bad_value);
1370 return FALSE;
1371 }
1372
1373 /* This relocation is like a PC-relative one, except the
1374 reference point is the location of GOT. Note that
1375 sgot->output_offset is not involved in this calculation. We
1376 always want the start of entire .got section, not the
1377 position after the reserved header. */
1378 relocation -= sgot->output_section->vma;
1379 break;
1380
1381 case R_CRIS_32_PLT_PCREL:
1382 /* Relocation is to the entry for this symbol in the
1383 procedure linkage table. */
1384
1385 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1386 without using the procedure linkage table. */
1387 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1388 break;
1389
1390 if (h->plt.offset == (bfd_vma) -1
1391 || splt == NULL)
1392 {
1393 /* We didn't make a PLT entry for this symbol. This
1394 happens when statically linking PIC code, or when
1395 using -Bsymbolic. */
1396 break;
1397 }
1398
1399 relocation = (splt->output_section->vma
1400 + splt->output_offset
1401 + h->plt.offset);
1402 break;
1403
1404 case R_CRIS_32_PLT_GOTREL:
1405 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1406 start of the .got section. See also comment at
1407 R_CRIS_32_GOT. */
1408 relocation -= sgot->output_section->vma;
1409
1410 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1411 without using the procedure linkage table. */
1412 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1413 break;
1414
1415 if (h->plt.offset == (bfd_vma) -1
1416 || splt == NULL)
1417 {
1418 /* We didn't make a PLT entry for this symbol. This
1419 happens when statically linking PIC code, or when
1420 using -Bsymbolic. */
1421 break;
1422 }
1423
1424 relocation = (splt->output_section->vma
1425 + splt->output_offset
1426 + h->plt.offset
1427 - sgot->output_section->vma);
1428 break;
1429
1430 case R_CRIS_8_PCREL:
1431 case R_CRIS_16_PCREL:
1432 case R_CRIS_32_PCREL:
1433 /* If the symbol was local, we need no shlib-specific handling. */
1434 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1435 || h->dynindx == -1)
1436 break;
1437
1438 /* Fall through. */
1439 case R_CRIS_8:
1440 case R_CRIS_16:
1441 case R_CRIS_32:
1442 if (bfd_link_pic (info)
1443 && !resolved_to_zero
1444 && r_symndx != STN_UNDEF
1445 && (input_section->flags & SEC_ALLOC) != 0
1446 && ((r_type != R_CRIS_8_PCREL
1447 && r_type != R_CRIS_16_PCREL
1448 && r_type != R_CRIS_32_PCREL)
1449 || (!SYMBOLIC_BIND (info, h)
1450 || (h != NULL && !h->def_regular))))
1451 {
1452 Elf_Internal_Rela outrel;
1453 bfd_byte *loc;
1454 bfd_boolean skip, relocate;
1455
1456 /* When generating a shared object, these relocations
1457 are copied into the output file to be resolved at run
1458 time. */
1459
1460 if (sreloc == NULL)
1461 {
1462 sreloc = _bfd_elf_get_dynamic_reloc_section
1463 (dynobj, input_section, /*rela?*/ TRUE);
1464 /* The section should have been created in cris_elf_check_relocs,
1465 but that function will not be called for objects which fail in
1466 cris_elf_merge_private_bfd_data. */
1467 if (sreloc == NULL)
1468 {
1469 bfd_set_error (bfd_error_bad_value);
1470 return FALSE;
1471 }
1472 }
1473
1474 skip = FALSE;
1475 relocate = FALSE;
1476
1477 outrel.r_offset =
1478 _bfd_elf_section_offset (output_bfd, info, input_section,
1479 rel->r_offset);
1480 if (outrel.r_offset == (bfd_vma) -1)
1481 skip = TRUE;
1482 else if (outrel.r_offset == (bfd_vma) -2
1483 /* For now, undefined weak symbols with non-default
1484 visibility (yielding 0), like exception info for
1485 discarded sections, will get a R_CRIS_NONE
1486 relocation rather than no relocation, because we
1487 notice too late that the symbol doesn't need a
1488 relocation. */
1489 || (h != NULL
1490 && h->root.type == bfd_link_hash_undefweak
1491 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1492 skip = TRUE, relocate = TRUE;
1493 outrel.r_offset += (input_section->output_section->vma
1494 + input_section->output_offset);
1495
1496 if (skip)
1497 memset (&outrel, 0, sizeof outrel);
1498 /* h->dynindx may be -1 if the symbol was marked to
1499 become local. */
1500 else if (h != NULL
1501 && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1)
1502 || !h->def_regular))
1503 {
1504 BFD_ASSERT (h->dynindx != -1);
1505 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1506 outrel.r_addend = relocation + rel->r_addend;
1507 }
1508 else
1509 {
1510 outrel.r_addend = relocation + rel->r_addend;
1511
1512 if (r_type == R_CRIS_32)
1513 {
1514 relocate = TRUE;
1515 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1516 }
1517 else
1518 {
1519 long indx;
1520
1521 if (bfd_is_abs_section (sec))
1522 indx = 0;
1523 else if (sec == NULL || sec->owner == NULL)
1524 {
1525 bfd_set_error (bfd_error_bad_value);
1526 return FALSE;
1527 }
1528 else
1529 {
1530 asection *osec;
1531
1532 /* We are turning this relocation into one
1533 against a section symbol. It would be
1534 proper to subtract the symbol's value,
1535 osec->vma, from the emitted reloc addend,
1536 but ld.so expects buggy relocs. */
1537 osec = sec->output_section;
1538 indx = elf_section_data (osec)->dynindx;
1539 if (indx == 0)
1540 {
1541 osec = htab->root.text_index_section;
1542 indx = elf_section_data (osec)->dynindx;
1543 }
1544 BFD_ASSERT (indx != 0);
1545 }
1546
1547 outrel.r_info = ELF32_R_INFO (indx, r_type);
1548 }
1549 }
1550
1551 loc = sreloc->contents;
1552 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1553 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1554
1555 /* This reloc will be computed at runtime, so there's no
1556 need to do anything now, except for R_CRIS_32 relocations
1557 that have been turned into R_CRIS_RELATIVE. */
1558 if (!relocate)
1559 continue;
1560 }
1561
1562 break;
1563
1564 case R_CRIS_16_DTPREL:
1565 case R_CRIS_32_DTPREL:
1566 /* This relocation must only be performed against local
1567 symbols, or to sections that are not loadable. It's also
1568 ok when we link a program and the symbol is defined in an
1569 ordinary (non-DSO) object (if it's undefined there, we've
1570 already seen an error). */
1571 if (h != NULL
1572 && (input_section->flags & SEC_ALLOC) != 0
1573 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1574 && (bfd_link_pic (info)
1575 || (!h->def_regular
1576 && h->root.type != bfd_link_hash_undefined)))
1577 {
1578 _bfd_error_handler
1579 ((h->root.type == bfd_link_hash_undefined)
1580 /* We shouldn't get here for GCC-emitted code. */
1581 /* xgettext:c-format */
1582 ? _("%pB, section %pA: relocation %s has an undefined"
1583 " reference to `%s', perhaps a declaration mixup?")
1584 /* xgettext:c-format */
1585 : _("%pB, section %pA: relocation %s is"
1586 " not allowed for `%s', a global symbol with default"
1587 " visibility, perhaps a declaration mixup?"),
1588 input_bfd,
1589 input_section,
1590 cris_elf_howto_table[r_type].name,
1591 symname != NULL && symname[0] != '\0'
1592 ? symname : _("[whose name is lost]"));
1593 bfd_set_error (bfd_error_bad_value);
1594 return FALSE;
1595 }
1596
1597 BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1598 || htab->dtpmod_refcount != 0);
1599
1600 /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1601 already done so. Note that we do this in .got.plt, not
1602 in .got, as .got.plt contains the first part, still the
1603 reloc is against .got, because the linker script directs
1604 (is required to direct) them both into .got. */
1605 if (htab->dtpmod_refcount > 0
1606 && (input_section->flags & SEC_ALLOC) != 0)
1607 {
1608 asection *sgotplt = htab->root.sgotplt;
1609 BFD_ASSERT (sgotplt != NULL);
1610
1611 if (bfd_link_pic (info))
1612 {
1613 Elf_Internal_Rela outrel;
1614 bfd_byte *loc;
1615
1616 srelgot = htab->root.srelgot;
1617 BFD_ASSERT (srelgot != NULL);
1618 loc = srelgot->contents;
1619 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1620
1621 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1622 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1623 outrel.r_offset = (sgotplt->output_section->vma
1624 + sgotplt->output_offset
1625 + 12);
1626 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1627 outrel.r_addend = 0;
1628 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1629 }
1630 else
1631 {
1632 /* For an executable, the GOT entry contents is known. */
1633 bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1634 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1635 }
1636
1637 /* Reverse the sign to mark that we've emitted the
1638 required GOT entry. */
1639 htab->dtpmod_refcount = - htab->dtpmod_refcount;
1640 }
1641
1642 /* The relocation is the offset from the start of the module
1643 TLS block to the (local) symbol. */
1644 relocation -= elf_hash_table (info)->tls_sec == NULL
1645 ? 0 : elf_hash_table (info)->tls_sec->vma;
1646 break;
1647
1648 case R_CRIS_32_GD:
1649 if (bfd_link_pic (info))
1650 {
1651 bfd_set_error (bfd_error_invalid_operation);
1652
1653 /* We've already informed in cris_elf_check_relocs that
1654 this is an error. */
1655 return FALSE;
1656 }
1657 /* Fall through. */
1658
1659 case R_CRIS_16_GOT_GD:
1660 case R_CRIS_32_GOT_GD:
1661 if (rel->r_addend != 0)
1662 {
1663 /* We can't do anything for a relocation which is against a
1664 symbol *plus offset*. The GOT holds relocations for
1665 symbols. Make this an error; the compiler isn't allowed
1666 to pass us these kinds of things. */
1667 _bfd_error_handler
1668 /* xgettext:c-format */
1669 (_("%pB, section %pA: relocation %s with non-zero addend"
1670 " %" PRId64 " against symbol `%s'"),
1671 input_bfd,
1672 input_section,
1673 cris_elf_howto_table[r_type].name,
1674 (int64_t) rel->r_addend,
1675 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1676
1677 bfd_set_error (bfd_error_bad_value);
1678 return FALSE;
1679 }
1680
1681 if (!bfd_link_pic (info)
1682 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1683 {
1684 /* Known contents of the GOT. */
1685 bfd_vma off;
1686
1687 /* The symbol is defined in the program, so just write
1688 (1, known_tpoffset) into the GOT. */
1689 relocation -= elf_hash_table (info)->tls_sec->vma;
1690
1691 if (h != NULL)
1692 {
1693 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1694 ? h->got.offset + 4 : h->got.offset;
1695 }
1696 else
1697 {
1698 off = local_got_offsets[r_symndx];
1699 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1700 off += 4;
1701 }
1702
1703 /* We use bit 1 of the offset as a flag for GOT entry with
1704 the R_CRIS_DTP reloc, setting it when we've emitted the
1705 GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL
1706 relocs. */
1707 if ((off & 2) == 0)
1708 {
1709 off &= ~3;
1710
1711 if (h != NULL)
1712 h->got.offset |= 2;
1713 else
1714 local_got_offsets[r_symndx] |= 2;
1715
1716 bfd_put_32 (output_bfd, 1, sgot->contents + off);
1717 bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1718 }
1719 else
1720 off &= ~3;
1721
1722 relocation = sgot->output_offset + off
1723 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1724 }
1725 else
1726 {
1727 /* Not all parts of the GOT entry are known; emit a real
1728 relocation. */
1729 bfd_vma off;
1730
1731 if (h != NULL)
1732 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1733 ? h->got.offset + 4 : h->got.offset;
1734 else
1735 {
1736 off = local_got_offsets[r_symndx];
1737 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1738 off += 4;
1739 }
1740
1741 /* See above re bit 1 and bit 0 usage. */
1742 if ((off & 2) == 0)
1743 {
1744 Elf_Internal_Rela outrel;
1745 bfd_byte *loc;
1746
1747 off &= ~3;
1748
1749 if (h != NULL)
1750 h->got.offset |= 2;
1751 else
1752 local_got_offsets[r_symndx] |= 2;
1753
1754 /* Clear the target contents of the GOT (just as a
1755 gesture; it's already cleared on allocation): this
1756 relocation is not like the other dynrelocs. */
1757 bfd_put_32 (output_bfd, 0, sgot->contents + off);
1758 bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1759
1760 srelgot = htab->root.srelgot;
1761 BFD_ASSERT (srelgot != NULL);
1762
1763 if (h != NULL && h->dynindx != -1)
1764 {
1765 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1766 relocation = 0;
1767 }
1768 else
1769 {
1770 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1771
1772 /* NULL if we had an error. */
1773 relocation -= elf_hash_table (info)->tls_sec == NULL
1774 ? 0 : elf_hash_table (info)->tls_sec->vma;
1775 }
1776
1777 outrel.r_offset = (sgot->output_section->vma
1778 + sgot->output_offset
1779 + off);
1780 outrel.r_addend = relocation;
1781 loc = srelgot->contents;
1782 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1783
1784 /* NULL if we had an error. */
1785 if (srelgot->contents != NULL)
1786 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1787 }
1788 else
1789 off &= ~3;
1790
1791 relocation = sgot->output_offset + off
1792 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1793 }
1794
1795 /* The GOT-relative offset to the GOT entry is the
1796 relocation, or for R_CRIS_32_GD, the actual address of
1797 the GOT entry. */
1798 break;
1799
1800 case R_CRIS_32_IE:
1801 if (bfd_link_pic (info))
1802 {
1803 bfd_set_error (bfd_error_invalid_operation);
1804
1805 /* We've already informed in cris_elf_check_relocs that
1806 this is an error. */
1807 return FALSE;
1808 }
1809 /* Fall through. */
1810
1811 case R_CRIS_32_GOT_TPREL:
1812 case R_CRIS_16_GOT_TPREL:
1813 if (rel->r_addend != 0)
1814 {
1815 /* We can't do anything for a relocation which is
1816 against a symbol *plus offset*. GOT holds
1817 relocations for symbols. Make this an error; the
1818 compiler isn't allowed to pass us these kinds of
1819 things. */
1820 _bfd_error_handler
1821 /* xgettext:c-format */
1822 (_("%pB, section %pA: relocation %s with non-zero addend"
1823 " %" PRId64 " against symbol `%s'"),
1824 input_bfd,
1825 input_section,
1826 cris_elf_howto_table[r_type].name,
1827 (int64_t) rel->r_addend,
1828 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1829 bfd_set_error (bfd_error_bad_value);
1830 return FALSE;
1831 }
1832
1833 if (!bfd_link_pic (info)
1834 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1835 {
1836 /* Known contents of the GOT. */
1837 bfd_vma off;
1838
1839 /* The symbol is defined in the program, so just write
1840 the -prog_tls_size+known_tpoffset into the GOT. */
1841 relocation -= elf_hash_table (info)->tls_sec->vma;
1842 relocation -= elf_hash_table (info)->tls_size;
1843
1844 if (h != NULL)
1845 off = h->got.offset;
1846 else
1847 off = local_got_offsets[r_symndx];
1848
1849 /* Bit 0 is used to mark whether we've emitted the required
1850 entry (and if needed R_CRIS_32_TPREL reloc). Bit 1
1851 is used similarly for R_CRIS_DTP, see above. */
1852 if ((off & 1) == 0)
1853 {
1854 off &= ~3;
1855
1856 if (h != NULL)
1857 h->got.offset |= 1;
1858 else
1859 local_got_offsets[r_symndx] |= 1;
1860
1861 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1862 }
1863 else
1864 off &= ~3;
1865
1866 relocation = sgot->output_offset + off
1867 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1868 }
1869 else
1870 {
1871 /* Emit a real relocation. */
1872 bfd_vma off;
1873
1874 if (h != NULL)
1875 off = h->got.offset;
1876 else
1877 off = local_got_offsets[r_symndx];
1878
1879 /* See above re usage of bit 0 and 1. */
1880 if ((off & 1) == 0)
1881 {
1882 Elf_Internal_Rela outrel;
1883 bfd_byte *loc;
1884
1885 off &= ~3;
1886
1887 if (h != NULL)
1888 h->got.offset |= 1;
1889 else
1890 local_got_offsets[r_symndx] |= 1;
1891
1892 srelgot = htab->root.srelgot;
1893 BFD_ASSERT (srelgot != NULL);
1894
1895 if (h != NULL && h->dynindx != -1)
1896 {
1897 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1898 relocation = 0;
1899 }
1900 else
1901 {
1902 outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1903
1904 /* NULL if we had an error. */
1905 relocation -= elf_hash_table (info)->tls_sec == NULL
1906 ? 0 : elf_hash_table (info)->tls_sec->vma;
1907 }
1908
1909 /* Just "define" the initial contents in some
1910 semi-logical way. */
1911 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1912
1913 outrel.r_offset = (sgot->output_section->vma
1914 + sgot->output_offset
1915 + off);
1916 outrel.r_addend = relocation;
1917 loc = srelgot->contents;
1918 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1919 /* NULL if we had an error. */
1920 if (srelgot->contents != NULL)
1921 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1922 }
1923 else
1924 off &= ~3;
1925
1926 relocation = sgot->output_offset + off
1927 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1928 }
1929
1930 /* The GOT-relative offset to the GOT entry is the relocation,
1931 or for R_CRIS_32_GD, the actual address of the GOT entry. */
1932 break;
1933
1934 case R_CRIS_16_TPREL:
1935 case R_CRIS_32_TPREL:
1936 /* This relocation must only be performed against symbols
1937 defined in an ordinary (non-DSO) object. */
1938 if (bfd_link_pic (info))
1939 {
1940 bfd_set_error (bfd_error_invalid_operation);
1941
1942 /* We've already informed in cris_elf_check_relocs that
1943 this is an error. */
1944 return FALSE;
1945 }
1946
1947 if (h != NULL
1948 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1949 && !(h->def_regular || ELF_COMMON_DEF_P (h))
1950 /* If it's undefined, then an error message has already
1951 been emitted. */
1952 && h->root.type != bfd_link_hash_undefined)
1953 {
1954 _bfd_error_handler
1955 /* xgettext:c-format */
1956 (_("%pB, section %pA: relocation %s is"
1957 " not allowed for symbol: `%s'"
1958 " which is defined outside the program,"
1959 " perhaps a declaration mixup?"),
1960 input_bfd,
1961 input_section,
1962 cris_elf_howto_table[r_type].name,
1963 symname);
1964 bfd_set_error (bfd_error_bad_value);
1965 return FALSE;
1966 }
1967
1968 /* NULL if we had an error. */
1969 relocation -= elf_hash_table (info)->tls_sec == NULL
1970 ? 0
1971 : (elf_hash_table (info)->tls_sec->vma
1972 + elf_hash_table (info)->tls_size);
1973
1974 /* The TLS-relative offset is the relocation. */
1975 break;
1976
1977 default:
1978 BFD_FAIL ();
1979 return FALSE;
1980 }
1981
1982 r = cris_final_link_relocate (howto, input_bfd, input_section,
1983 contents, rel, relocation);
1984
1985 if (r != bfd_reloc_ok)
1986 {
1987 const char * msg = (const char *) NULL;
1988
1989 switch (r)
1990 {
1991 case bfd_reloc_overflow:
1992 (*info->callbacks->reloc_overflow)
1993 (info, (h ? &h->root : NULL), symname, howto->name,
1994 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1995 if (additional_relocation_error_msg_count > 0)
1996 {
1997 additional_relocation_error_msg_count--;
1998 switch (r_type)
1999 {
2000 case R_CRIS_16_GOTPLT:
2001 case R_CRIS_16_GOT:
2002
2003 /* Not just TLS is involved here, so we make
2004 generation and message depend on -fPIC/-fpic
2005 only. */
2006 case R_CRIS_16_GOT_TPREL:
2007 case R_CRIS_16_GOT_GD:
2008 _bfd_error_handler
2009 (_("(too many global variables for -fpic:"
2010 " recompile with -fPIC)"));
2011 break;
2012
2013 case R_CRIS_16_TPREL:
2014 case R_CRIS_16_DTPREL:
2015 _bfd_error_handler
2016 (_("(thread-local data too big for -fpic or"
2017 " -msmall-tls: recompile with -fPIC or"
2018 " -mno-small-tls)"));
2019 break;
2020
2021 /* No known cause for overflow for other relocs. */
2022 default:
2023 break;
2024 }
2025 }
2026 break;
2027
2028 case bfd_reloc_undefined:
2029 (*info->callbacks->undefined_symbol)
2030 (info, symname, input_bfd, input_section, rel->r_offset, TRUE);
2031 break;
2032
2033 case bfd_reloc_outofrange:
2034 msg = _("internal error: out of range error");
2035 break;
2036
2037 case bfd_reloc_notsupported:
2038 msg = _("internal error: unsupported relocation error");
2039 break;
2040
2041 case bfd_reloc_dangerous:
2042 msg = _("internal error: dangerous relocation");
2043 break;
2044
2045 default:
2046 msg = _("internal error: unknown error");
2047 break;
2048 }
2049
2050 if (msg)
2051 (*info->callbacks->warning) (info, msg, symname, input_bfd,
2052 input_section, rel->r_offset);
2053 }
2054 }
2055
2056 return TRUE;
2057 }
2058 \f
2059 /* Finish up dynamic symbol handling. We set the contents of various
2060 dynamic sections here. */
2061
2062 static bfd_boolean
2063 elf_cris_finish_dynamic_symbol (bfd *output_bfd,
2064 struct bfd_link_info *info,
2065 struct elf_link_hash_entry *h,
2066 Elf_Internal_Sym *sym)
2067 {
2068 struct elf_cris_link_hash_table * htab;
2069
2070 /* Where in the plt entry to put values. */
2071 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2072
2073 /* What offset to add to the distance to the first PLT entry for the
2074 value at plt_off3. */
2075 int plt_off3_value_bias = 4;
2076
2077 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2078 for PIC and non-PIC for v32 and pre-v32). */
2079 int plt_stub_offset = 8;
2080 int plt_entry_size = PLT_ENTRY_SIZE;
2081 const bfd_byte *plt_entry = elf_cris_plt_entry;
2082 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2083
2084 htab = elf_cris_hash_table (info);
2085 if (htab == NULL)
2086 return FALSE;
2087
2088 /* Adjust the various PLT entry offsets. */
2089 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2090 {
2091 plt_off2 = 14;
2092 plt_off3 = 20;
2093 plt_off3_value_bias = -2;
2094 plt_stub_offset = 12;
2095 plt_entry_size = PLT_ENTRY_SIZE_V32;
2096 plt_entry = elf_cris_plt_entry_v32;
2097 plt_pic_entry = elf_cris_pic_plt_entry_v32;
2098 }
2099
2100 if (h->plt.offset != (bfd_vma) -1)
2101 {
2102 asection *splt;
2103 asection *sgotplt;
2104 asection *srela;
2105 bfd_vma got_base;
2106
2107 bfd_vma gotplt_offset
2108 = elf_cris_hash_entry (h)->gotplt_offset;
2109 Elf_Internal_Rela rela;
2110 bfd_byte *loc;
2111 bfd_boolean has_gotplt = gotplt_offset != 0;
2112
2113 /* Get the index in the .rela.plt relocations for the .got.plt
2114 entry that corresponds to this symbol.
2115 We have to count backwards here, and the result is only valid
2116 as an index into .rela.plt. We also have to undo the effect
2117 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2118 .got.plt) for which gotplt_offset is adjusted, because while
2119 that entry goes into .got.plt, its relocation goes into
2120 .rela.got, not .rela.plt. (It's not PLT-specific; not to be
2121 processed as part of the runtime lazy .rela.plt relocation).
2122 FIXME: There be literal constants here... */
2123 bfd_vma rela_plt_index
2124 = (htab->dtpmod_refcount != 0
2125 ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2126
2127 /* Get the offset into the .got table of the entry that corresponds
2128 to this function. Note that we embed knowledge that "incoming"
2129 .got goes after .got.plt in the output without padding (pointer
2130 aligned). However, that knowledge is present in several other
2131 places too. */
2132 bfd_vma got_offset
2133 = (has_gotplt
2134 ? gotplt_offset
2135 : h->got.offset + htab->next_gotplt_entry);
2136
2137 /* This symbol has an entry in the procedure linkage table. Set it
2138 up. */
2139
2140 BFD_ASSERT (h->dynindx != -1);
2141
2142 splt = htab->root.splt;
2143 sgotplt = htab->root.sgotplt;
2144 srela = htab->root.srelplt;
2145 BFD_ASSERT (splt != NULL && sgotplt != NULL
2146 && (! has_gotplt || srela != NULL));
2147
2148 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2149
2150 /* Fill in the entry in the procedure linkage table. */
2151 if (! bfd_link_pic (info))
2152 {
2153 memcpy (splt->contents + h->plt.offset, plt_entry,
2154 plt_entry_size);
2155
2156 /* We need to enter the absolute address of the GOT entry here. */
2157 bfd_put_32 (output_bfd, got_base + got_offset,
2158 splt->contents + h->plt.offset + plt_off1);
2159 }
2160 else
2161 {
2162 memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2163 plt_entry_size);
2164 bfd_put_32 (output_bfd, got_offset,
2165 splt->contents + h->plt.offset + plt_off1);
2166 }
2167
2168 /* Fill in the plt entry and make a relocation, if this is a "real"
2169 PLT entry. */
2170 if (has_gotplt)
2171 {
2172 /* Fill in the offset to the reloc table. */
2173 bfd_put_32 (output_bfd,
2174 rela_plt_index * sizeof (Elf32_External_Rela),
2175 splt->contents + h->plt.offset + plt_off2);
2176
2177 /* Fill in the offset to the first PLT entry, where to "jump". */
2178 bfd_put_32 (output_bfd,
2179 - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2180 splt->contents + h->plt.offset + plt_off3);
2181
2182 /* Fill in the entry in the global offset table with the address of
2183 the relocating stub. */
2184 bfd_put_32 (output_bfd,
2185 (splt->output_section->vma
2186 + splt->output_offset
2187 + h->plt.offset
2188 + plt_stub_offset),
2189 sgotplt->contents + got_offset);
2190
2191 /* Fill in the entry in the .rela.plt section. */
2192 rela.r_offset = (sgotplt->output_section->vma
2193 + sgotplt->output_offset
2194 + got_offset);
2195 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2196 rela.r_addend = 0;
2197 loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2198 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2199 }
2200
2201 if (!h->def_regular)
2202 {
2203 /* Mark the symbol as undefined, rather than as defined in
2204 the .plt section. Leave the value alone. */
2205 sym->st_shndx = SHN_UNDEF;
2206
2207 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
2208 know whether resetting the value is significant; if it really
2209 is, rather than a quirk or bug in the sparc port, then I
2210 believe we'd see this elsewhere. */
2211 /* If the symbol is weak, we do need to clear the value.
2212 Otherwise, the PLT entry would provide a definition for
2213 the symbol even if the symbol wasn't defined anywhere,
2214 and so the symbol would never be NULL. */
2215 if (!h->ref_regular_nonweak)
2216 sym->st_value = 0;
2217 }
2218 }
2219
2220 /* For an ordinary program, we emit .got relocs only for symbols that
2221 are in the dynamic-symbols table and are either defined by the
2222 program or are undefined weak symbols, or are function symbols
2223 where we do not output a PLT: the PLT reloc was output above and all
2224 references to the function symbol are redirected to the PLT. */
2225 if (h->got.offset != (bfd_vma) -1
2226 && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2227 && (bfd_link_pic (info)
2228 || (h->dynindx != -1
2229 && h->plt.offset == (bfd_vma) -1
2230 && !h->def_regular
2231 && h->root.type != bfd_link_hash_undefweak)))
2232 {
2233 asection *sgot;
2234 asection *srela;
2235 Elf_Internal_Rela rela;
2236 bfd_byte *loc;
2237 bfd_byte *where;
2238
2239 /* This symbol has an entry in the global offset table. Set it up. */
2240
2241 sgot = htab->root.sgot;
2242 srela = htab->root.srelgot;
2243 BFD_ASSERT (sgot != NULL && srela != NULL);
2244
2245 rela.r_offset = (sgot->output_section->vma
2246 + sgot->output_offset
2247 + (h->got.offset &~ (bfd_vma) 1));
2248
2249 /* If this is a static link, or it is a -Bsymbolic link and the
2250 symbol is defined locally or was forced to be local because
2251 of a version file, we just want to emit a RELATIVE reloc.
2252 The entry in the global offset table will already have been
2253 initialized in the relocate_section function. */
2254 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2255 if (! elf_hash_table (info)->dynamic_sections_created
2256 || (bfd_link_pic (info)
2257 && (SYMBOLIC_BIND (info, h) || h->dynindx == -1)
2258 && h->def_regular))
2259 {
2260 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2261 rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2262 }
2263 else
2264 {
2265 bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2266 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2267 rela.r_addend = 0;
2268 }
2269
2270 loc = srela->contents;
2271 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2272 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2273 }
2274
2275 if (h->needs_copy)
2276 {
2277 asection *s;
2278 Elf_Internal_Rela rela;
2279 bfd_byte *loc;
2280
2281 /* This symbol needs a copy reloc. Set it up. */
2282
2283 BFD_ASSERT (h->dynindx != -1
2284 && (h->root.type == bfd_link_hash_defined
2285 || h->root.type == bfd_link_hash_defweak));
2286
2287 if (h->root.u.def.section == htab->root.sdynrelro)
2288 s = htab->root.sreldynrelro;
2289 else
2290 s = htab->root.srelbss;
2291
2292 rela.r_offset = (h->root.u.def.value
2293 + h->root.u.def.section->output_section->vma
2294 + h->root.u.def.section->output_offset);
2295 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2296 rela.r_addend = 0;
2297 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2298 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2299 }
2300
2301 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2302 if (h == elf_hash_table (info)->hdynamic
2303 || h == elf_hash_table (info)->hgot)
2304 sym->st_shndx = SHN_ABS;
2305
2306 return TRUE;
2307 }
2308 \f
2309 /* Finish up the dynamic sections. Do *not* emit relocs here, as their
2310 offsets were changed, as part of -z combreloc handling, from those we
2311 computed. */
2312
2313 static bfd_boolean
2314 elf_cris_finish_dynamic_sections (bfd *output_bfd,
2315 struct bfd_link_info *info)
2316 {
2317 bfd *dynobj;
2318 asection *sgot;
2319 asection *sdyn;
2320
2321 dynobj = elf_hash_table (info)->dynobj;
2322
2323 sgot = elf_hash_table (info)->sgotplt;
2324 BFD_ASSERT (sgot != NULL);
2325 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2326
2327 if (elf_hash_table (info)->dynamic_sections_created)
2328 {
2329 asection *splt;
2330 Elf32_External_Dyn *dyncon, *dynconend;
2331
2332 splt = elf_hash_table (info)->splt;
2333 BFD_ASSERT (splt != NULL && sdyn != NULL);
2334
2335 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2336 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2337 for (; dyncon < dynconend; dyncon++)
2338 {
2339 Elf_Internal_Dyn dyn;
2340 asection *s;
2341
2342 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2343
2344 switch (dyn.d_tag)
2345 {
2346 default:
2347 break;
2348
2349 case DT_PLTGOT:
2350 dyn.d_un.d_ptr = sgot->output_section->vma + sgot->output_offset;
2351 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2352 break;
2353
2354 case DT_JMPREL:
2355 /* Yes, we *can* have a .plt and no .plt.rela, for instance
2356 if all symbols are found in the .got (not .got.plt). */
2357 s = elf_hash_table (info)->srelplt;
2358 dyn.d_un.d_ptr = s != NULL ? (s->output_section->vma
2359 + s->output_offset) : 0;
2360 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2361 break;
2362
2363 case DT_PLTRELSZ:
2364 s = elf_hash_table (info)->srelplt;
2365 if (s == NULL)
2366 dyn.d_un.d_val = 0;
2367 else
2368 dyn.d_un.d_val = s->size;
2369 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2370 break;
2371 }
2372 }
2373
2374 /* Fill in the first entry in the procedure linkage table. */
2375 if (splt->size > 0)
2376 {
2377 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2378 {
2379 if (bfd_link_pic (info))
2380 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2381 PLT_ENTRY_SIZE_V32);
2382 else
2383 {
2384 memcpy (splt->contents, elf_cris_plt0_entry_v32,
2385 PLT_ENTRY_SIZE_V32);
2386 bfd_put_32 (output_bfd,
2387 sgot->output_section->vma
2388 + sgot->output_offset + 4,
2389 splt->contents + 4);
2390
2391 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2392 = PLT_ENTRY_SIZE_V32;
2393 }
2394 }
2395 else
2396 {
2397 if (bfd_link_pic (info))
2398 memcpy (splt->contents, elf_cris_pic_plt0_entry,
2399 PLT_ENTRY_SIZE);
2400 else
2401 {
2402 memcpy (splt->contents, elf_cris_plt0_entry,
2403 PLT_ENTRY_SIZE);
2404 bfd_put_32 (output_bfd,
2405 sgot->output_section->vma
2406 + sgot->output_offset + 4,
2407 splt->contents + 6);
2408 bfd_put_32 (output_bfd,
2409 sgot->output_section->vma
2410 + sgot->output_offset + 8,
2411 splt->contents + 14);
2412
2413 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2414 = PLT_ENTRY_SIZE;
2415 }
2416 }
2417 }
2418 }
2419
2420 /* Fill in the first three entries in the global offset table. */
2421 if (sgot->size > 0)
2422 {
2423 if (sdyn == NULL)
2424 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2425 else
2426 bfd_put_32 (output_bfd,
2427 sdyn->output_section->vma + sdyn->output_offset,
2428 sgot->contents);
2429 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2430 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2431 }
2432
2433 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2434
2435 return TRUE;
2436 }
2437 \f
2438 /* Return the section that should be marked against GC for a given
2439 relocation. */
2440
2441 static asection *
2442 cris_elf_gc_mark_hook (asection *sec,
2443 struct bfd_link_info *info,
2444 Elf_Internal_Rela *rel,
2445 struct elf_link_hash_entry *h,
2446 Elf_Internal_Sym *sym)
2447 {
2448 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2449 if (h != NULL)
2450 switch (r_type)
2451 {
2452 case R_CRIS_GNU_VTINHERIT:
2453 case R_CRIS_GNU_VTENTRY:
2454 return NULL;
2455
2456 default:
2457 break;
2458 }
2459
2460 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2461 }
2462
2463 /* The elf_backend_plt_sym_val hook function. */
2464
2465 static bfd_vma
2466 cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, const asection *plt,
2467 const arelent *rel)
2468 {
2469 bfd_size_type plt_entry_size;
2470 bfd_size_type pltoffs;
2471 bfd *abfd = plt->owner;
2472
2473 /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[]. */
2474 bfd_size_type plt_entry_got_offset = 2;
2475 bfd_size_type plt_sec_size;
2476 bfd_size_type got_vma_for_dyn;
2477 asection *got;
2478
2479 /* FIXME: the .got section should be readily available also when
2480 we're not linking. */
2481 if ((got = bfd_get_section_by_name (abfd, ".got")) == NULL)
2482 return (bfd_vma) -1;
2483
2484 plt_sec_size = bfd_section_size (plt);
2485 plt_entry_size
2486 = (bfd_get_mach (abfd) == bfd_mach_cris_v32
2487 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2488
2489 /* Data in PLT is GOT-relative for DYN, but absolute for EXE. */
2490 got_vma_for_dyn = (abfd->flags & EXEC_P) ? 0 : got->vma;
2491
2492 /* Because we can have merged GOT entries; a single .got entry for
2493 both GOT and the PLT part of the GOT (.got.plt), the index of the
2494 reloc in .rela.plt is not the same as the index in the PLT.
2495 Instead, we have to hunt down the GOT offset in the PLT that
2496 corresponds to that of this reloc. Unfortunately, we will only
2497 be called for the .rela.plt relocs, so we'll miss synthetic
2498 symbols for .plt entries with merged GOT entries. (FIXME:
2499 fixable by providing our own bfd_elf32_get_synthetic_symtab.
2500 Doesn't seem worthwile at time of this writing.) FIXME: we've
2501 gone from O(1) to O(N) (N number of PLT entries) for finding each
2502 PLT address. Shouldn't matter in practice though. */
2503
2504 for (pltoffs = plt_entry_size;
2505 pltoffs < plt_sec_size;
2506 pltoffs += plt_entry_size)
2507 {
2508 bfd_size_type got_offset;
2509 bfd_byte gotoffs_raw[4];
2510
2511 if (!bfd_get_section_contents (abfd, (asection *) plt, gotoffs_raw,
2512 pltoffs + plt_entry_got_offset,
2513 sizeof (gotoffs_raw)))
2514 return (bfd_vma) -1;
2515
2516 got_offset = bfd_get_32 (abfd, gotoffs_raw);
2517 if (got_offset + got_vma_for_dyn == rel->address)
2518 return plt->vma + pltoffs;
2519 }
2520
2521 /* While it's tempting to BFD_ASSERT that we shouldn't get here,
2522 that'd not be graceful behavior for invalid input. */
2523 return (bfd_vma) -1;
2524 }
2525
2526 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2527 entry but we found we will not create any. Called when we find we will
2528 not have any PLT for this symbol, by for example
2529 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2530 or elf_cris_size_dynamic_sections if no dynamic sections will be
2531 created (we're only linking static objects). */
2532
2533 static bfd_boolean
2534 elf_cris_adjust_gotplt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2535 {
2536 struct bfd_link_info *info = (struct bfd_link_info *) p;
2537
2538 /* A GOTPLT reloc, when activated, is supposed to be included into
2539 the PLT refcount, when the symbol isn't set-or-forced local. */
2540 BFD_ASSERT (h->gotplt_refcount == 0
2541 || h->root.plt.refcount == -1
2542 || h->gotplt_refcount <= h->root.plt.refcount);
2543
2544 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2545 if (h->gotplt_refcount <= 0)
2546 return TRUE;
2547
2548 if (h->reg_got_refcount > 0)
2549 {
2550 /* There's a GOT entry for this symbol. Just adjust the refcounts.
2551 Probably not necessary at this stage, but keeping them accurate
2552 helps avoiding surprises later. */
2553 h->root.got.refcount += h->gotplt_refcount;
2554 h->reg_got_refcount += h->gotplt_refcount;
2555 h->gotplt_refcount = 0;
2556 }
2557 else
2558 {
2559 /* No GOT entry for this symbol. We need to create one. */
2560 asection *sgot;
2561 asection *srelgot;
2562
2563 sgot = elf_hash_table (info)->sgot;
2564 srelgot = elf_hash_table (info)->srelgot;
2565
2566 /* Put accurate refcounts there. */
2567 BFD_ASSERT (h->root.got.refcount >= 0);
2568 h->root.got.refcount += h->gotplt_refcount;
2569 h->reg_got_refcount = h->gotplt_refcount;
2570
2571 h->gotplt_refcount = 0;
2572
2573 /* We always have a .got and a .rela.got section if there were
2574 GOTPLT relocs in input. */
2575 BFD_ASSERT (sgot != NULL && srelgot != NULL);
2576
2577 /* Allocate space in the .got section. */
2578 sgot->size += 4;
2579
2580 /* Allocate relocation space. */
2581 srelgot->size += sizeof (Elf32_External_Rela);
2582 }
2583
2584 return TRUE;
2585 }
2586
2587 /* Try to fold PLT entries with GOT entries. There are two cases when we
2588 want to do this:
2589
2590 - When all PLT references are GOTPLT references, and there are GOT
2591 references, and this is not the executable. We don't have to
2592 generate a PLT at all.
2593
2594 - When there are both (ordinary) PLT references and GOT references,
2595 and this isn't the executable.
2596 We want to make the PLT reference use the ordinary GOT entry rather
2597 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2598 since the GOT entry will have to be resolved at startup anyway.
2599
2600 Though the latter case is handled when room for the PLT is allocated,
2601 not here.
2602
2603 By folding into the GOT, we may need a round-trip to a PLT in the
2604 executable for calls, a loss in performance. Still, losing a
2605 reloc is a win in size and at least in start-up time.
2606
2607 Note that this function is called before symbols are forced local by
2608 version scripts. The differing cases are handled by
2609 elf_cris_hide_symbol. */
2610
2611 static bfd_boolean
2612 elf_cris_try_fold_plt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2613 {
2614 struct bfd_link_info *info = (struct bfd_link_info *) p;
2615
2616 /* If there are no GOT references for this symbol, we can't fold any
2617 other reference so there's nothing to do. Likewise if there are no
2618 PLT references; GOTPLT references included. */
2619 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2620 return TRUE;
2621
2622 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2623 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2624
2625 if (h->gotplt_refcount == h->root.plt.refcount)
2626 {
2627 /* The only PLT references are GOTPLT references, and there are GOT
2628 references. Convert PLT to GOT references. */
2629 if (! elf_cris_adjust_gotplt_to_got (h, info))
2630 return FALSE;
2631
2632 /* Clear the PLT references, so no PLT will be created. */
2633 h->root.plt.offset = (bfd_vma) -1;
2634 }
2635
2636 return TRUE;
2637 }
2638
2639 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2640 to use a GOT entry (and create one) rather than requiring a GOTPLT
2641 entry. */
2642
2643 static void
2644 elf_cris_hide_symbol (struct bfd_link_info *info,
2645 struct elf_link_hash_entry *h,
2646 bfd_boolean force_local)
2647 {
2648 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2649
2650 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2651 }
2652
2653 /* Adjust a symbol defined by a dynamic object and referenced by a
2654 regular object. The current definition is in some section of the
2655 dynamic object, but we're not including those sections. We have to
2656 change the definition to something the rest of the link can
2657 understand. */
2658
2659 static bfd_boolean
2660 elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
2661 struct elf_link_hash_entry *h)
2662 {
2663 struct elf_cris_link_hash_table * htab;
2664 bfd *dynobj;
2665 asection *s;
2666 asection *srel;
2667 bfd_size_type plt_entry_size;
2668
2669 htab = elf_cris_hash_table (info);
2670 if (htab == NULL)
2671 return FALSE;
2672
2673 dynobj = htab->root.dynobj;
2674
2675 /* Make sure we know what is going on here. */
2676 BFD_ASSERT (dynobj != NULL
2677 && (h->needs_plt
2678 || h->is_weakalias
2679 || (h->def_dynamic
2680 && h->ref_regular
2681 && !h->def_regular)));
2682
2683 plt_entry_size
2684 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2685 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2686
2687 /* If this is a function, put it in the procedure linkage table. We
2688 will fill in the contents of the procedure linkage table later,
2689 when we know the address of the .got section. */
2690 if (h->type == STT_FUNC
2691 || h->needs_plt)
2692 {
2693 /* If we link a program (not a DSO), we'll get rid of unnecessary
2694 PLT entries; we point to the actual symbols -- even for pic
2695 relocs, because a program built with -fpic should have the same
2696 result as one built without -fpic, specifically considering weak
2697 symbols.
2698 FIXME: m68k and i386 differ here, for unclear reasons. */
2699 if (! bfd_link_pic (info)
2700 && !h->def_dynamic)
2701 {
2702 /* This case can occur if we saw a PLT reloc in an input file,
2703 but the symbol was not defined by a dynamic object. In such
2704 a case, we don't actually need to build a procedure linkage
2705 table, and we can just do an absolute or PC reloc instead, or
2706 change a .got.plt index to a .got index for GOTPLT relocs. */
2707 BFD_ASSERT (h->needs_plt);
2708 h->needs_plt = 0;
2709 h->plt.offset = (bfd_vma) -1;
2710 return
2711 elf_cris_adjust_gotplt_to_got ((struct
2712 elf_cris_link_hash_entry *) h,
2713 info);
2714 }
2715
2716 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2717 where a pointer-equivalent symbol was unimportant (i.e. more
2718 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2719 of the PLT. We can't for the executable, because the GOT
2720 entries will point to the PLT there (and be constant). */
2721 if (bfd_link_pic (info)
2722 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2723 h, info))
2724 return FALSE;
2725
2726 /* GC or folding may have rendered this entry unused. */
2727 if (h->plt.refcount <= 0)
2728 {
2729 h->needs_plt = 0;
2730 h->plt.offset = (bfd_vma) -1;
2731 return TRUE;
2732 }
2733
2734 /* Make sure this symbol is output as a dynamic symbol. */
2735 if (h->dynindx == -1)
2736 {
2737 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2738 return FALSE;
2739 }
2740
2741 s = htab->root.splt;
2742 BFD_ASSERT (s != NULL);
2743
2744 /* If this is the first .plt entry, make room for the special
2745 first entry. */
2746 if (s->size == 0)
2747 s->size += plt_entry_size;
2748
2749 /* If this symbol is not defined in a regular file, and we are
2750 not generating a shared library, then set the symbol to this
2751 location in the .plt. */
2752 if (!bfd_link_pic (info)
2753 && !h->def_regular)
2754 {
2755 h->root.u.def.section = s;
2756 h->root.u.def.value = s->size;
2757 }
2758
2759 /* If there's already a GOT entry, use that, not a .got.plt. A
2760 GOT field still has a reference count when we get here; it's
2761 not yet changed to an offset. We can't do this for an
2762 executable, because then the reloc associated with the PLT
2763 would get a non-PLT reloc pointing to the PLT. FIXME: Move
2764 this to elf_cris_try_fold_plt_to_got. */
2765 if (bfd_link_pic (info) && h->got.refcount > 0)
2766 {
2767 h->got.refcount += h->plt.refcount;
2768
2769 /* Mark the PLT offset to use the GOT entry by setting the low
2770 bit in the plt offset; it is always a multiple of
2771 plt_entry_size (which is at least a multiple of 2). */
2772 BFD_ASSERT ((s->size % plt_entry_size) == 0);
2773
2774 /* Change the PLT refcount to an offset. */
2775 h->plt.offset = s->size;
2776
2777 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2778 that the got entry should be used instead. */
2779 BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2780 h)->gotplt_offset == 0);
2781
2782 /* Make room for this entry. */
2783 s->size += plt_entry_size;
2784
2785 return TRUE;
2786 }
2787
2788 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2789 h->plt.offset = s->size;
2790
2791 /* Make room for this entry. */
2792 s->size += plt_entry_size;
2793
2794 /* We also need to make an entry in the .got.plt section, which
2795 will be placed in the .got section by the linker script. */
2796 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2797 = htab->next_gotplt_entry;
2798 htab->next_gotplt_entry += 4;
2799
2800 s = htab->root.sgotplt;
2801 BFD_ASSERT (s != NULL);
2802 s->size += 4;
2803
2804 /* We also need to make an entry in the .rela.plt section. */
2805
2806 s = htab->root.srelplt;
2807 BFD_ASSERT (s != NULL);
2808 s->size += sizeof (Elf32_External_Rela);
2809
2810 return TRUE;
2811 }
2812
2813 /* Reinitialize the plt offset now that it is not used as a reference
2814 count any more. */
2815 h->plt.offset = (bfd_vma) -1;
2816
2817 /* If this is a weak symbol, and there is a real definition, the
2818 processor independent code will have arranged for us to see the
2819 real definition first, and we can just use the same value. */
2820 if (h->is_weakalias)
2821 {
2822 struct elf_link_hash_entry *def = weakdef (h);
2823 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2824 h->root.u.def.section = def->root.u.def.section;
2825 h->root.u.def.value = def->root.u.def.value;
2826 return TRUE;
2827 }
2828
2829 /* This is a reference to a symbol defined by a dynamic object which
2830 is not a function. */
2831
2832 /* If we are creating a shared library, we must presume that the
2833 only references to the symbol are via the global offset table.
2834 For such cases we need not do anything here; the relocations will
2835 be handled correctly by relocate_section. */
2836 if (bfd_link_pic (info))
2837 return TRUE;
2838
2839 /* If there are no references to this symbol that do not use the
2840 GOT, we don't need to generate a copy reloc. */
2841 if (!h->non_got_ref)
2842 return TRUE;
2843
2844 /* We must allocate the symbol in our .dynbss section, which will
2845 become part of the .bss section of the executable. There will be
2846 an entry for this symbol in the .dynsym section. The dynamic
2847 object will contain position independent code, so all references
2848 from the dynamic object to this symbol will go through the global
2849 offset table. The dynamic linker will use the .dynsym entry to
2850 determine the address it must put in the global offset table, so
2851 both the dynamic object and the regular object will refer to the
2852 same memory location for the variable. */
2853
2854 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2855 copy the initial value out of the dynamic object and into the
2856 runtime process image. We need to remember the offset into the
2857 .rela.bss section we are going to use. */
2858
2859 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
2860 {
2861 s = htab->root.sdynrelro;
2862 srel = htab->root.sreldynrelro;
2863 }
2864 else
2865 {
2866 s = htab->root.sdynbss;
2867 srel = htab->root.srelbss;
2868 }
2869 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2870 {
2871 BFD_ASSERT (srel != NULL);
2872 srel->size += sizeof (Elf32_External_Rela);
2873 h->needs_copy = 1;
2874 }
2875
2876 BFD_ASSERT (s != NULL);
2877
2878 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2879 }
2880
2881 /* Adjust our "subclass" elements for an indirect symbol. */
2882
2883 static void
2884 elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
2885 struct elf_link_hash_entry *dir,
2886 struct elf_link_hash_entry *ind)
2887 {
2888 struct elf_cris_link_hash_entry *edir, *eind;
2889
2890 edir = (struct elf_cris_link_hash_entry *) dir;
2891 eind = (struct elf_cris_link_hash_entry *) ind;
2892
2893 /* Only indirect symbols are replaced; we're not interested in
2894 updating any of EIND's fields for other symbols. */
2895 if (eind->root.root.type != bfd_link_hash_indirect)
2896 {
2897 /* Still, we need to copy flags for e.g. weak definitions. */
2898 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2899 return;
2900 }
2901
2902 BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
2903
2904 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
2905 #define XMOVE(F) XMOVOPZ (F, +=, 0)
2906 if (eind->pcrel_relocs_copied != NULL)
2907 {
2908 if (edir->pcrel_relocs_copied != NULL)
2909 {
2910 struct elf_cris_pcrel_relocs_copied **pp;
2911 struct elf_cris_pcrel_relocs_copied *p;
2912
2913 /* Add reloc counts against the indirect sym to the direct sym
2914 list. Merge any entries against the same section. */
2915 for (pp = &eind->pcrel_relocs_copied; *pp != NULL;)
2916 {
2917 struct elf_cris_pcrel_relocs_copied *q;
2918 p = *pp;
2919 for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next)
2920 if (q->section == p->section)
2921 {
2922 q->count += p->count;
2923 *pp = p->next;
2924 break;
2925 }
2926 if (q == NULL)
2927 pp = &p->next;
2928 }
2929 *pp = edir->pcrel_relocs_copied;
2930 }
2931 XMOVOPZ (pcrel_relocs_copied, =, NULL);
2932 }
2933 XMOVE (gotplt_refcount);
2934 XMOVE (gotplt_offset);
2935 XMOVE (reg_got_refcount);
2936 XMOVE (tprel_refcount);
2937 XMOVE (dtp_refcount);
2938 #undef XMOVE
2939 #undef XMOVOPZ
2940
2941 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2942 }
2943
2944 /* Look through the relocs for a section during the first phase. */
2945
2946 static bfd_boolean
2947 cris_elf_check_relocs (bfd *abfd,
2948 struct bfd_link_info *info,
2949 asection *sec,
2950 const Elf_Internal_Rela *relocs)
2951 {
2952 struct elf_cris_link_hash_table * htab;
2953 bfd *dynobj;
2954 Elf_Internal_Shdr *symtab_hdr;
2955 struct elf_link_hash_entry **sym_hashes;
2956 bfd_signed_vma *local_got_refcounts;
2957 const Elf_Internal_Rela *rel;
2958 const Elf_Internal_Rela *rel_end;
2959 asection *sgot;
2960 asection *srelgot;
2961 asection *sreloc;
2962
2963 if (bfd_link_relocatable (info))
2964 return TRUE;
2965
2966 htab = elf_cris_hash_table (info);
2967 if (htab == NULL)
2968 return FALSE;
2969
2970 dynobj = elf_hash_table (info)->dynobj;
2971 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2972 sym_hashes = elf_sym_hashes (abfd);
2973 local_got_refcounts = elf_local_got_refcounts (abfd);
2974
2975 sgot = NULL;
2976 srelgot = NULL;
2977 sreloc = NULL;
2978
2979 rel_end = relocs + sec->reloc_count;
2980 for (rel = relocs; rel < rel_end; rel++)
2981 {
2982 struct elf_link_hash_entry *h;
2983 unsigned long r_symndx;
2984 enum elf_cris_reloc_type r_type;
2985 bfd_signed_vma got_element_size = 4;
2986 unsigned long r_symndx_lgot = INT_MAX;
2987
2988 r_symndx = ELF32_R_SYM (rel->r_info);
2989 if (r_symndx < symtab_hdr->sh_info)
2990 {
2991 h = NULL;
2992 r_symndx_lgot = LGOT_REG_NDX (r_symndx);
2993 }
2994 else
2995 {
2996 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2997 while (h->root.type == bfd_link_hash_indirect
2998 || h->root.type == bfd_link_hash_warning)
2999 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3000 }
3001
3002 r_type = ELF32_R_TYPE (rel->r_info);
3003
3004 /* Some relocs require linker-created sections; we need to hang them
3005 on the first input bfd we found that contained dynamic relocs. */
3006 switch (r_type)
3007 {
3008 case R_CRIS_32_DTPREL:
3009 if ((sec->flags & SEC_ALLOC) == 0)
3010 /* This'd be a .dtpreld entry in e.g. debug info. We have
3011 several different switch statements below, but none of
3012 that is needed; we need no preparations for resolving
3013 R_CRIS_32_DTPREL into a non-allocated section (debug
3014 info), so let's just move on to the next
3015 relocation. */
3016 continue;
3017 /* Fall through. */
3018 case R_CRIS_16_DTPREL:
3019 /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3020 entry at index 3. */
3021 if (htab->dtpmod_refcount == 0)
3022 htab->next_gotplt_entry += 8;
3023
3024 htab->dtpmod_refcount++;
3025 /* Fall through. */
3026
3027 case R_CRIS_32_IE:
3028 case R_CRIS_32_GD:
3029 case R_CRIS_16_GOT_GD:
3030 case R_CRIS_32_GOT_GD:
3031 case R_CRIS_32_GOT_TPREL:
3032 case R_CRIS_16_GOT_TPREL:
3033 case R_CRIS_16_GOT:
3034 case R_CRIS_32_GOT:
3035 case R_CRIS_32_GOTREL:
3036 case R_CRIS_32_PLT_GOTREL:
3037 case R_CRIS_32_PLT_PCREL:
3038 case R_CRIS_16_GOTPLT:
3039 case R_CRIS_32_GOTPLT:
3040 if (dynobj == NULL)
3041 {
3042 elf_hash_table (info)->dynobj = dynobj = abfd;
3043
3044 /* We could handle this if we can get a handle on the
3045 output bfd in elf_cris_adjust_dynamic_symbol. Failing
3046 that, we must insist on dynobj being a specific mach. */
3047 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3048 {
3049 _bfd_error_handler
3050 /* xgettext:c-format */
3051 (_("%pB, section %pA: v10/v32 compatible object"
3052 " must not contain a PIC relocation"),
3053 abfd, sec);
3054 return FALSE;
3055 }
3056 }
3057
3058 if (sgot == NULL)
3059 {
3060 /* We may have a dynobj but no .got section, if machine-
3061 independent parts of the linker found a reason to create
3062 a dynobj. We want to create the .got section now, so we
3063 can assume it's always present whenever there's a dynobj.
3064 It's ok to call this function more than once. */
3065 if (!_bfd_elf_create_got_section (dynobj, info))
3066 return FALSE;
3067
3068 sgot = elf_hash_table (info)->sgot;
3069 srelgot = elf_hash_table (info)->srelgot;
3070 }
3071
3072 if (local_got_refcounts == NULL)
3073 {
3074 bfd_size_type amt;
3075
3076 /* We use index local_got_refcounts[-1] to count all
3077 GOT-relative relocations that do not have explicit
3078 GOT entries. */
3079 amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3080 amt *= sizeof (bfd_signed_vma);
3081 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3082 if (local_got_refcounts == NULL)
3083 return FALSE;
3084
3085 local_got_refcounts++;
3086 elf_local_got_refcounts (abfd) = local_got_refcounts;
3087 }
3088 break;
3089
3090 default:
3091 break;
3092 }
3093
3094 /* Warn and error for invalid input. */
3095 switch (r_type)
3096 {
3097 case R_CRIS_32_IE:
3098 case R_CRIS_32_TPREL:
3099 case R_CRIS_16_TPREL:
3100 case R_CRIS_32_GD:
3101 if (bfd_link_pic (info))
3102 {
3103 _bfd_error_handler
3104 /* xgettext:c-format */
3105 (_("%pB, section %pA:\n relocation %s not valid"
3106 " in a shared object;"
3107 " typically an option mixup, recompile with -fPIC"),
3108 abfd,
3109 sec,
3110 cris_elf_howto_table[r_type].name);
3111 /* Don't return FALSE here; we want messages for all of
3112 these and the error behavior is ungraceful
3113 anyway. */
3114 }
3115 default:
3116 break;
3117 }
3118
3119 switch (r_type)
3120 {
3121 case R_CRIS_32_GD:
3122 case R_CRIS_16_GOT_GD:
3123 case R_CRIS_32_GOT_GD:
3124 /* These are requests for tls_index entries, run-time R_CRIS_DTP. */
3125 got_element_size = 8;
3126 r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3127 break;
3128
3129 case R_CRIS_16_DTPREL:
3130 case R_CRIS_32_DTPREL:
3131 /* These two just request for the constant-index
3132 module-local tls_index-sized GOT entry, which we add
3133 elsewhere. */
3134 break;
3135
3136 case R_CRIS_32_IE:
3137 case R_CRIS_32_GOT_TPREL:
3138 case R_CRIS_16_GOT_TPREL:
3139 r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3140
3141 /* Those relocs also require that a DSO is of type
3142 Initial Exec. Like other targets, we don't reset this
3143 flag even if the relocs are GC:ed away. */
3144 if (bfd_link_pic (info))
3145 info->flags |= DF_STATIC_TLS;
3146 break;
3147
3148 /* Let's list the other assembler-generated TLS-relocs too,
3149 just to show that they're not forgotten. */
3150 case R_CRIS_16_TPREL:
3151 case R_CRIS_32_TPREL:
3152 default:
3153 break;
3154 }
3155
3156 switch (r_type)
3157 {
3158 case R_CRIS_16_GOTPLT:
3159 case R_CRIS_32_GOTPLT:
3160 /* Mark that we need a GOT entry if the PLT entry (and its GOT
3161 entry) is eliminated. We can only do this for a non-local
3162 symbol. */
3163 if (h != NULL)
3164 {
3165 elf_cris_hash_entry (h)->gotplt_refcount++;
3166 goto handle_gotplt_reloc;
3167 }
3168 /* If h is NULL then this is a local symbol, and we must make a
3169 GOT entry for it, so handle it like a GOT reloc. */
3170 /* Fall through. */
3171
3172 case R_CRIS_32_IE:
3173 case R_CRIS_32_GD:
3174 case R_CRIS_16_GOT_GD:
3175 case R_CRIS_32_GOT_GD:
3176 case R_CRIS_32_GOT_TPREL:
3177 case R_CRIS_16_GOT_TPREL:
3178 case R_CRIS_16_GOT:
3179 case R_CRIS_32_GOT:
3180 /* This symbol requires a global offset table entry. */
3181 if (h != NULL)
3182 {
3183 if (h->got.refcount == 0)
3184 {
3185 /* Make sure this symbol is output as a dynamic symbol. */
3186 if (h->dynindx == -1)
3187 {
3188 if (!bfd_elf_link_record_dynamic_symbol (info, h))
3189 return FALSE;
3190 }
3191 }
3192
3193 /* Update the sum of reloc counts for this symbol. */
3194 h->got.refcount++;
3195
3196 switch (r_type)
3197 {
3198 case R_CRIS_16_GOT:
3199 case R_CRIS_32_GOT:
3200 if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3201 {
3202 /* Allocate space in the .got section. */
3203 sgot->size += got_element_size;
3204 /* Allocate relocation space. */
3205 srelgot->size += sizeof (Elf32_External_Rela);
3206 }
3207 elf_cris_hash_entry (h)->reg_got_refcount++;
3208 break;
3209
3210 case R_CRIS_32_GD:
3211 case R_CRIS_16_GOT_GD:
3212 case R_CRIS_32_GOT_GD:
3213 if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3214 {
3215 /* Allocate space in the .got section. */
3216 sgot->size += got_element_size;
3217 /* Allocate relocation space. */
3218 srelgot->size += sizeof (Elf32_External_Rela);
3219 }
3220 elf_cris_hash_entry (h)->dtp_refcount++;
3221 break;
3222
3223 case R_CRIS_32_IE:
3224 case R_CRIS_32_GOT_TPREL:
3225 case R_CRIS_16_GOT_TPREL:
3226 if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3227 {
3228 /* Allocate space in the .got section. */
3229 sgot->size += got_element_size;
3230 /* Allocate relocation space. */
3231 srelgot->size += sizeof (Elf32_External_Rela);
3232 }
3233 elf_cris_hash_entry (h)->tprel_refcount++;
3234 break;
3235
3236 default:
3237 BFD_FAIL ();
3238 break;
3239 }
3240 }
3241 else
3242 {
3243 /* This is a global offset table entry for a local symbol. */
3244 if (local_got_refcounts[r_symndx_lgot] == 0)
3245 {
3246 sgot->size += got_element_size;
3247 if (bfd_link_pic (info))
3248 {
3249 /* If we are generating a shared object, we need
3250 to output a R_CRIS_RELATIVE reloc so that the
3251 dynamic linker can adjust this GOT entry.
3252 Similarly for non-regular got entries. */
3253 srelgot->size += sizeof (Elf32_External_Rela);
3254 }
3255 }
3256 /* Update the reloc-specific count. */
3257 local_got_refcounts[r_symndx_lgot]++;
3258
3259 /* This one is the sum of all the others. */
3260 local_got_refcounts[r_symndx]++;
3261 }
3262 break;
3263
3264 case R_CRIS_16_DTPREL:
3265 case R_CRIS_32_DTPREL:
3266 case R_CRIS_32_GOTREL:
3267 /* This reference requires a global offset table.
3268 FIXME: The actual refcount isn't used currently; the .got
3269 section can't be removed if there were any references in the
3270 input. */
3271 local_got_refcounts[-1]++;
3272 break;
3273
3274 handle_gotplt_reloc:
3275
3276 case R_CRIS_32_PLT_GOTREL:
3277 /* This reference requires a global offset table. */
3278 local_got_refcounts[-1]++;
3279 /* Fall through. */
3280
3281 case R_CRIS_32_PLT_PCREL:
3282 /* This symbol requires a procedure linkage table entry. We
3283 actually build the entry in adjust_dynamic_symbol,
3284 because this might be a case of linking PIC code which is
3285 never referenced by a dynamic object, in which case we
3286 don't need to generate a procedure linkage table entry
3287 after all. */
3288
3289 /* Beware: if we'd check for visibility of the symbol here
3290 (and not marking the need for a PLT when non-visible), we'd
3291 get into trouble with keeping handling consistent with
3292 regards to relocs found before definition and GOTPLT
3293 handling. Eliminable PLT entries will be dealt with later
3294 anyway. */
3295 if (h == NULL)
3296 continue;
3297
3298 h->needs_plt = 1;
3299
3300 /* If the symbol is forced local, the refcount is unavailable. */
3301 if (h->plt.refcount != -1)
3302 h->plt.refcount++;
3303 break;
3304
3305 case R_CRIS_8:
3306 case R_CRIS_16:
3307 case R_CRIS_32:
3308 /* Let's help debug shared library creation. Any of these
3309 relocs *can* be used in shared libs, but pages containing
3310 them cannot be shared, so they're not appropriate for
3311 common use. Don't warn for sections we don't care about,
3312 such as debug sections or non-constant sections. We
3313 can't help tables of (global) function pointers, for
3314 example, though they must be emitted in a (writable) data
3315 section to avoid having impure text sections. */
3316 if (bfd_link_pic (info)
3317 && (sec->flags & SEC_ALLOC) != 0
3318 && (sec->flags & SEC_READONLY) != 0)
3319 {
3320 /* FIXME: How do we make this optionally a warning only? */
3321 _bfd_error_handler
3322 /* xgettext:c-format */
3323 (_("%pB, section %pA: relocation %s should not"
3324 " be used in a shared object; recompile with -fPIC"),
3325 abfd,
3326 sec,
3327 cris_elf_howto_table[r_type].name);
3328 }
3329
3330 /* We don't need to handle relocs into sections not going into
3331 the "real" output. */
3332 if ((sec->flags & SEC_ALLOC) == 0)
3333 break;
3334
3335 if (h != NULL)
3336 {
3337 h->non_got_ref = 1;
3338
3339 /* Make sure a plt entry is created for this symbol if it
3340 turns out to be a function defined by a dynamic object. */
3341 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3342 h->plt.refcount++;
3343 }
3344
3345 /* If we are creating a shared library and this is not a local
3346 symbol, we need to copy the reloc into the shared library.
3347 However when linking with -Bsymbolic and this is a global
3348 symbol which is defined in an object we are including in the
3349 link (i.e., DEF_REGULAR is set), then we can resolve the
3350 reloc directly. At this point we have not seen all the input
3351 files, so it is possible that DEF_REGULAR is not set now but
3352 will be set later (it is never cleared). In case of a weak
3353 definition, DEF_REGULAR may be cleared later by a strong
3354 definition in a shared library. We account for that
3355 possibility below by storing information in the relocs_copied
3356 field of the hash table entry. A similar situation occurs
3357 when creating shared libraries and symbol visibility changes
3358 render the symbol local. */
3359
3360 /* No need to do anything if we're not creating a shared object. */
3361 if (! bfd_link_pic (info)
3362 || (h != NULL && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
3363 break;
3364
3365 /* We may need to create a reloc section in the dynobj and made room
3366 for this reloc. */
3367 if (sreloc == NULL)
3368 {
3369 sreloc = _bfd_elf_make_dynamic_reloc_section
3370 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3371
3372 if (sreloc == NULL)
3373 return FALSE;
3374 }
3375
3376 if (sec->flags & SEC_READONLY)
3377 info->flags |= DF_TEXTREL;
3378
3379 sreloc->size += sizeof (Elf32_External_Rela);
3380 break;
3381
3382 case R_CRIS_8_PCREL:
3383 case R_CRIS_16_PCREL:
3384 case R_CRIS_32_PCREL:
3385 if (h != NULL)
3386 {
3387 h->non_got_ref = 1;
3388
3389 /* Make sure a plt entry is created for this symbol if it
3390 turns out to be a function defined by a dynamic object. */
3391 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3392 h->plt.refcount++;
3393 }
3394
3395 /* If we are creating a shared library and this is not a local
3396 symbol, we need to copy the reloc into the shared library.
3397 However when linking with -Bsymbolic and this is a global
3398 symbol which is defined in an object we are including in the
3399 link (i.e., DEF_REGULAR is set), then we can resolve the
3400 reloc directly. At this point we have not seen all the input
3401 files, so it is possible that DEF_REGULAR is not set now but
3402 will be set later (it is never cleared). In case of a weak
3403 definition, DEF_REGULAR may be cleared later by a strong
3404 definition in a shared library. We account for that
3405 possibility below by storing information in the relocs_copied
3406 field of the hash table entry. A similar situation occurs
3407 when creating shared libraries and symbol visibility changes
3408 render the symbol local. */
3409
3410 /* No need to do anything if we're not creating a shared object. */
3411 if (! bfd_link_pic (info))
3412 break;
3413
3414 /* We don't need to handle relocs into sections not going into
3415 the "real" output. */
3416 if ((sec->flags & SEC_ALLOC) == 0)
3417 break;
3418
3419 /* If the symbol is local, then we know already we can
3420 eliminate the reloc. */
3421 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3422 break;
3423
3424 /* If this is with -Bsymbolic and the symbol isn't weak, and
3425 is defined by an ordinary object (the ones we include in
3426 this shared library) then we can also eliminate the
3427 reloc. See comment above for more eliminable cases which
3428 we can't identify at this time. */
3429 if (SYMBOLIC_BIND (info, h)
3430 && h->root.type != bfd_link_hash_defweak
3431 && h->def_regular)
3432 break;
3433
3434 /* We may need to create a reloc section in the dynobj and made room
3435 for this reloc. */
3436 if (sreloc == NULL)
3437 {
3438 sreloc = _bfd_elf_make_dynamic_reloc_section
3439 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3440
3441 if (sreloc == NULL)
3442 return FALSE;
3443 }
3444
3445 sreloc->size += sizeof (Elf32_External_Rela);
3446
3447 /* We count the number of PC relative relocations we have
3448 entered for this symbol, so that we can discard them
3449 again if the symbol is later defined by a regular object.
3450 We know that h is really a pointer to an
3451 elf_cris_link_hash_entry. */
3452 {
3453 struct elf_cris_link_hash_entry *eh;
3454 struct elf_cris_pcrel_relocs_copied *p;
3455
3456 eh = elf_cris_hash_entry (h);
3457
3458 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3459 if (p->section == sec)
3460 break;
3461
3462 if (p == NULL)
3463 {
3464 p = ((struct elf_cris_pcrel_relocs_copied *)
3465 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3466 if (p == NULL)
3467 return FALSE;
3468 p->next = eh->pcrel_relocs_copied;
3469 eh->pcrel_relocs_copied = p;
3470 p->section = sec;
3471 p->count = 0;
3472 p->r_type = r_type;
3473 }
3474
3475 ++p->count;
3476 }
3477 break;
3478
3479 /* This relocation describes the C++ object vtable hierarchy.
3480 Reconstruct it for later use during GC. */
3481 case R_CRIS_GNU_VTINHERIT:
3482 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3483 return FALSE;
3484 break;
3485
3486 /* This relocation describes which C++ vtable entries are actually
3487 used. Record for later use during GC. */
3488 case R_CRIS_GNU_VTENTRY:
3489 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3490 return FALSE;
3491 break;
3492
3493 case R_CRIS_16_TPREL:
3494 case R_CRIS_32_TPREL:
3495 /* Already warned above, when necessary. */
3496 break;
3497
3498 default:
3499 /* Other relocs do not appear here. */
3500 bfd_set_error (bfd_error_bad_value);
3501 return FALSE;
3502 }
3503 }
3504
3505 return TRUE;
3506 }
3507
3508 /* Set the sizes of the dynamic sections. */
3509
3510 static bfd_boolean
3511 elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3512 struct bfd_link_info *info)
3513 {
3514 struct elf_cris_link_hash_table * htab;
3515 bfd *dynobj;
3516 asection *s;
3517 bfd_boolean relocs;
3518
3519 htab = elf_cris_hash_table (info);
3520 if (htab == NULL)
3521 return FALSE;
3522
3523 dynobj = htab->root.dynobj;
3524 BFD_ASSERT (dynobj != NULL);
3525
3526 if (htab->root.dynamic_sections_created)
3527 {
3528 /* Set the contents of the .interp section to the interpreter. */
3529 if (bfd_link_executable (info) && !info->nointerp)
3530 {
3531 s = bfd_get_linker_section (dynobj, ".interp");
3532 BFD_ASSERT (s != NULL);
3533 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3534 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3535 }
3536 }
3537 else
3538 {
3539 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
3540 elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
3541 info);
3542
3543 /* We may have created entries in the .rela.got section.
3544 However, if we are not creating the dynamic sections, we will
3545 not actually use these entries. Reset the size of .rela.got,
3546 which will cause it to get stripped from the output file
3547 below. */
3548 s = htab->root.srelgot;
3549 if (s != NULL)
3550 s->size = 0;
3551 }
3552
3553 /* If this is a -Bsymbolic shared link, then we need to discard all PC
3554 relative relocs against symbols defined in a regular object. We
3555 allocated space for them in the check_relocs routine, but we will not
3556 fill them in in the relocate_section routine. We also discard space
3557 for relocs that have become for local symbols due to symbol
3558 visibility changes. For programs, we discard space for relocs for
3559 symbols not referenced by any dynamic object. */
3560 if (bfd_link_pic (info))
3561 elf_cris_link_hash_traverse (htab,
3562 elf_cris_discard_excess_dso_dynamics,
3563 info);
3564 else
3565 elf_cris_link_hash_traverse (htab,
3566 elf_cris_discard_excess_program_dynamics,
3567 info);
3568
3569 /* The check_relocs and adjust_dynamic_symbol entry points have
3570 determined the sizes of the various dynamic sections. Allocate
3571 memory for them. */
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_section_name (s);
3583
3584 if (strcmp (name, ".plt") == 0)
3585 {
3586 ;
3587 }
3588 else if (strcmp (name, ".got.plt") == 0)
3589 {
3590 /* The .got.plt contains the .got header as well as the
3591 actual .got.plt contents. The .got header may contain a
3592 R_CRIS_DTPMOD entry at index 3. */
3593 s->size += htab->dtpmod_refcount != 0
3594 ? 8 : 0;
3595 }
3596 else if (CONST_STRNEQ (name, ".rela"))
3597 {
3598 if (strcmp (name, ".rela.got") == 0
3599 && htab->dtpmod_refcount != 0
3600 && bfd_link_pic (info))
3601 s->size += sizeof (Elf32_External_Rela);
3602
3603 if (s->size != 0)
3604 {
3605 /* Remember whether there are any reloc sections other
3606 than .rela.plt. */
3607 if (strcmp (name, ".rela.plt") != 0)
3608 relocs = TRUE;
3609
3610 /* We use the reloc_count field as a counter if we need
3611 to copy relocs into the output file. */
3612 s->reloc_count = 0;
3613 }
3614 }
3615 else if (! CONST_STRNEQ (name, ".got")
3616 && strcmp (name, ".dynbss") != 0
3617 && s != htab->root.sdynrelro)
3618 {
3619 /* It's not one of our sections, so don't allocate space. */
3620 continue;
3621 }
3622
3623 if (s->size == 0)
3624 {
3625 /* If we don't need this section, strip it from the
3626 output file. This is mostly to handle .rela.bss and
3627 .rela.plt. We must create both sections in
3628 create_dynamic_sections, because they must be created
3629 before the linker maps input sections to output
3630 sections. The linker does that before
3631 adjust_dynamic_symbol is called, and it is that
3632 function which decides whether anything needs to go
3633 into these sections. */
3634 s->flags |= SEC_EXCLUDE;
3635 continue;
3636 }
3637
3638 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3639 continue;
3640
3641 /* Allocate memory for the section contents. We use bfd_zalloc here
3642 in case unused entries are not reclaimed before the section's
3643 contents are written out. This should not happen, but this way
3644 if it does, we will not write out garbage. For reloc sections,
3645 this will make entries have the type R_CRIS_NONE. */
3646 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3647 if (s->contents == NULL)
3648 return FALSE;
3649 }
3650
3651 return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
3652 }
3653
3654 /* This function is called via elf_cris_link_hash_traverse if we are
3655 creating a shared object. In the -Bsymbolic case, it discards the
3656 space allocated to copy PC relative relocs against symbols which
3657 are defined in regular objects. For the normal non-symbolic case,
3658 we also discard space for relocs that have become local due to
3659 symbol visibility changes. We allocated space for them in the
3660 check_relocs routine, but we won't fill them in in the
3661 relocate_section routine. */
3662
3663 static bfd_boolean
3664 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *h,
3665 void * inf)
3666 {
3667 struct elf_cris_pcrel_relocs_copied *s;
3668 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3669
3670 /* If a symbol has been forced local or we have found a regular
3671 definition for the symbolic link case, then we won't be needing
3672 any relocs. */
3673 if (h->root.def_regular
3674 && (h->root.forced_local
3675 || SYMBOLIC_BIND (info, &h->root)))
3676 {
3677 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3678 {
3679 asection *sreloc
3680 = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info)
3681 ->dynobj,
3682 s->section,
3683 /*rela?*/ TRUE);
3684 sreloc->size -= s->count * sizeof (Elf32_External_Rela);
3685 }
3686 return TRUE;
3687 }
3688
3689 /* If we have accounted for PC-relative relocs for read-only
3690 sections, now is the time to warn for them. We can't do it in
3691 cris_elf_check_relocs, because we don't know the status of all
3692 symbols at that time (and it's common to force symbols local
3693 late). */
3694
3695 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3696 if ((s->section->flags & SEC_READONLY) != 0)
3697 {
3698 /* FIXME: How do we make this optionally a warning only? */
3699 _bfd_error_handler
3700 /* xgettext:c-format */
3701 (_("%pB, section `%pA', to symbol `%s':"
3702 " relocation %s should not be used"
3703 " in a shared object; recompile with -fPIC"),
3704 s->section->owner,
3705 s->section,
3706 h->root.root.root.string,
3707 cris_elf_howto_table[s->r_type].name);
3708
3709 info->flags |= DF_TEXTREL;
3710 }
3711
3712 return TRUE;
3713 }
3714
3715 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3716 creating a shared object. We discard space for relocs for symbols put
3717 in the .got, but which we found we do not have to resolve at run-time. */
3718
3719 static bfd_boolean
3720 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *h,
3721 void * inf)
3722 {
3723 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3724
3725 /* If we're not creating a shared library and have a symbol which is
3726 referred to by .got references, but the symbol is defined locally,
3727 (or rather, not defined by a DSO) then lose the reloc for the .got
3728 (don't allocate room for it). Likewise for relocs for something
3729 for which we create a PLT. */
3730 if (!h->root.def_dynamic
3731 || h->root.plt.refcount > 0)
3732 {
3733 if (h->reg_got_refcount > 0
3734 /* The size of this section is only valid and in sync with the
3735 various reference counts if we do dynamic; don't decrement it
3736 otherwise. */
3737 && elf_hash_table (info)->dynamic_sections_created)
3738 {
3739 bfd *dynobj = elf_hash_table (info)->dynobj;
3740 asection *srelgot = elf_hash_table (info)->srelgot;
3741
3742 BFD_ASSERT (dynobj != NULL);
3743 BFD_ASSERT (srelgot != NULL);
3744
3745 srelgot->size -= sizeof (Elf32_External_Rela);
3746 }
3747
3748 /* If the locally-defined symbol isn't used by a DSO, then we don't
3749 have to export it as a dynamic symbol. This was already done for
3750 functions; doing this for all symbols would presumably not
3751 introduce new problems. Of course we don't do this if we're
3752 exporting all dynamic symbols, or all data symbols, regardless of
3753 them being referenced or not. */
3754 if (! (info->export_dynamic
3755 || (h->root.type != STT_FUNC && info->dynamic_data))
3756 && h->root.dynindx != -1
3757 && !h->root.dynamic
3758 && !h->root.def_dynamic
3759 && !h->root.ref_dynamic)
3760 {
3761 h->root.dynindx = -1;
3762 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3763 h->root.dynstr_index);
3764 }
3765 }
3766
3767 return TRUE;
3768 }
3769
3770 /* Reject a file depending on presence and expectation of prefixed
3771 underscores on symbols. */
3772
3773 static bfd_boolean
3774 cris_elf_object_p (bfd *abfd)
3775 {
3776 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
3777 return FALSE;
3778
3779 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
3780 return (bfd_get_symbol_leading_char (abfd) == '_');
3781 else
3782 return (bfd_get_symbol_leading_char (abfd) == 0);
3783 }
3784
3785 /* Mark presence or absence of leading underscore. Set machine type
3786 flags from mach type. */
3787
3788 static bfd_boolean
3789 cris_elf_final_write_processing (bfd *abfd)
3790 {
3791 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
3792
3793 e_flags &= ~EF_CRIS_UNDERSCORE;
3794 if (bfd_get_symbol_leading_char (abfd) == '_')
3795 e_flags |= EF_CRIS_UNDERSCORE;
3796
3797 switch (bfd_get_mach (abfd))
3798 {
3799 case bfd_mach_cris_v0_v10:
3800 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
3801 break;
3802
3803 case bfd_mach_cris_v10_v32:
3804 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
3805 break;
3806
3807 case bfd_mach_cris_v32:
3808 e_flags |= EF_CRIS_VARIANT_V32;
3809 break;
3810
3811 default:
3812 _bfd_abort (__FILE__, __LINE__,
3813 _("unexpected machine number"));
3814 }
3815
3816 elf_elfheader (abfd)->e_flags = e_flags;
3817 return _bfd_elf_final_write_processing (abfd);
3818 }
3819
3820 /* Set the mach type from e_flags value. */
3821
3822 static bfd_boolean
3823 cris_elf_set_mach_from_flags (bfd *abfd,
3824 unsigned long flags)
3825 {
3826 switch (flags & EF_CRIS_VARIANT_MASK)
3827 {
3828 case EF_CRIS_VARIANT_ANY_V0_V10:
3829 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
3830 break;
3831
3832 case EF_CRIS_VARIANT_V32:
3833 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
3834 break;
3835
3836 case EF_CRIS_VARIANT_COMMON_V10_V32:
3837 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
3838 break;
3839
3840 default:
3841 /* Since we don't recognize them, we obviously can't support them
3842 with this code; we'd have to require that all future handling
3843 would be optional. */
3844 bfd_set_error (bfd_error_wrong_format);
3845 return FALSE;
3846 }
3847
3848 return TRUE;
3849 }
3850
3851 /* Display the flags field. */
3852
3853 static bfd_boolean
3854 cris_elf_print_private_bfd_data (bfd *abfd, void * ptr)
3855 {
3856 FILE *file = (FILE *) ptr;
3857
3858 BFD_ASSERT (abfd != NULL && ptr != NULL);
3859
3860 _bfd_elf_print_private_bfd_data (abfd, ptr);
3861
3862 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3863
3864 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
3865 fprintf (file, _(" [symbols have a _ prefix]"));
3866 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3867 == EF_CRIS_VARIANT_COMMON_V10_V32)
3868 fprintf (file, _(" [v10 and v32]"));
3869 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3870 == EF_CRIS_VARIANT_V32)
3871 fprintf (file, _(" [v32]"));
3872
3873 fputc ('\n', file);
3874 return TRUE;
3875 }
3876
3877 /* Don't mix files with and without a leading underscore. */
3878
3879 static bfd_boolean
3880 cris_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3881 {
3882 bfd *obfd = info->output_bfd;
3883 int imach, omach;
3884
3885 if (! _bfd_generic_verify_endian_match (ibfd, info))
3886 return FALSE;
3887
3888 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3889 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3890 return TRUE;
3891
3892 imach = bfd_get_mach (ibfd);
3893
3894 if (! elf_flags_init (obfd))
3895 {
3896 /* This happens when ld starts out with a 'blank' output file. */
3897 elf_flags_init (obfd) = TRUE;
3898
3899 /* We ignore the linker-set mach, and instead set it according to
3900 the first input file. This would also happen if we could
3901 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
3902 This allows us to keep the same linker config across
3903 cris(v0..v10) and crisv32. The drawback is that we can't force
3904 the output type, which might be a sane thing to do for a
3905 v10+v32 compatibility object. */
3906 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3907 return FALSE;
3908 }
3909
3910 if (bfd_get_symbol_leading_char (ibfd)
3911 != bfd_get_symbol_leading_char (obfd))
3912 {
3913 _bfd_error_handler
3914 (bfd_get_symbol_leading_char (ibfd) == '_'
3915 ? _("%pB: uses _-prefixed symbols, but writing file with non-prefixed symbols")
3916 : _("%pB: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
3917 ibfd);
3918 bfd_set_error (bfd_error_bad_value);
3919 return FALSE;
3920 }
3921
3922 omach = bfd_get_mach (obfd);
3923
3924 if (imach != omach)
3925 {
3926 /* We can get an incompatible combination only if either is
3927 bfd_mach_cris_v32, and the other one isn't compatible. */
3928 if ((imach == bfd_mach_cris_v32
3929 && omach != bfd_mach_cris_v10_v32)
3930 || (omach == bfd_mach_cris_v32
3931 && imach != bfd_mach_cris_v10_v32))
3932 {
3933 _bfd_error_handler
3934 ((imach == bfd_mach_cris_v32)
3935 ? _("%pB contains CRIS v32 code, incompatible"
3936 " with previous objects")
3937 : _("%pB contains non-CRIS-v32 code, incompatible"
3938 " with previous objects"),
3939 ibfd);
3940 bfd_set_error (bfd_error_bad_value);
3941 return FALSE;
3942 }
3943
3944 /* We don't have to check the case where the input is compatible
3945 with v10 and v32, because the output is already known to be set
3946 to the other (compatible) mach. */
3947 if (omach == bfd_mach_cris_v10_v32
3948 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3949 return FALSE;
3950 }
3951
3952 return TRUE;
3953 }
3954
3955 /* Do side-effects of e_flags copying to obfd. */
3956
3957 static bfd_boolean
3958 cris_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
3959 {
3960 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3961 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3962 return TRUE;
3963
3964 /* Call the base function. */
3965 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
3966 return FALSE;
3967
3968 /* Do what we really came here for. */
3969 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
3970 }
3971
3972 static enum elf_reloc_type_class
3973 elf_cris_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3974 const asection *rel_sec ATTRIBUTE_UNUSED,
3975 const Elf_Internal_Rela *rela)
3976 {
3977 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
3978 switch (r_type)
3979 {
3980 case R_CRIS_RELATIVE:
3981 return reloc_class_relative;
3982 case R_CRIS_JUMP_SLOT:
3983 return reloc_class_plt;
3984 case R_CRIS_COPY:
3985 return reloc_class_copy;
3986 default:
3987 return reloc_class_normal;
3988 }
3989 }
3990
3991 /* The elf_backend_got_elt_size worker. For one symbol, we can have up to
3992 two GOT entries from three types with two different sizes. We handle
3993 it as a single entry, so we can use the regular offset-calculation
3994 machinery. */
3995
3996 static bfd_vma
3997 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
3998 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3999 struct elf_link_hash_entry *hr,
4000 bfd *ibfd,
4001 unsigned long symndx)
4002 {
4003 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4004 bfd_vma eltsiz = 0;
4005
4006 /* We may have one regular GOT entry or up to two TLS GOT
4007 entries. */
4008 if (h == NULL)
4009 {
4010 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4011 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4012
4013 BFD_ASSERT (local_got_refcounts != NULL);
4014
4015 if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4016 {
4017 /* We can't have a variable referred to both as a regular
4018 variable and through TLS relocs. */
4019 BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4020 && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4021 return 4;
4022 }
4023
4024 if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4025 eltsiz += 8;
4026
4027 if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4028 eltsiz += 4;
4029 }
4030 else
4031 {
4032 struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4033 if (hh->reg_got_refcount > 0)
4034 {
4035 /* The actual error-on-input is emitted elsewhere. */
4036 BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4037 return 4;
4038 }
4039
4040 if (hh->dtp_refcount > 0)
4041 eltsiz += 8;
4042
4043 if (hh->tprel_refcount > 0)
4044 eltsiz += 4;
4045 }
4046
4047 /* We're only called when h->got.refcount is non-zero, so we must
4048 have a non-zero size. */
4049 BFD_ASSERT (eltsiz != 0);
4050 return eltsiz;
4051 }
4052 \f
4053 #define ELF_ARCH bfd_arch_cris
4054 #define ELF_TARGET_ID CRIS_ELF_DATA
4055 #define ELF_MACHINE_CODE EM_CRIS
4056 #define ELF_MAXPAGESIZE 0x2000
4057
4058 #define TARGET_LITTLE_SYM cris_elf32_vec
4059 #define TARGET_LITTLE_NAME "elf32-cris"
4060 #define elf_symbol_leading_char 0
4061
4062 #define elf_info_to_howto_rel NULL
4063 #define elf_info_to_howto cris_info_to_howto_rela
4064 #define elf_backend_relocate_section cris_elf_relocate_section
4065 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
4066 #define elf_backend_plt_sym_val cris_elf_plt_sym_val
4067 #define elf_backend_check_relocs cris_elf_check_relocs
4068 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
4069 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
4070
4071 #define elf_backend_can_gc_sections 1
4072 #define elf_backend_can_refcount 1
4073
4074 #define elf_backend_object_p cris_elf_object_p
4075 #define elf_backend_final_write_processing \
4076 cris_elf_final_write_processing
4077 #define bfd_elf32_bfd_print_private_bfd_data \
4078 cris_elf_print_private_bfd_data
4079 #define bfd_elf32_bfd_merge_private_bfd_data \
4080 cris_elf_merge_private_bfd_data
4081 #define bfd_elf32_bfd_copy_private_bfd_data \
4082 cris_elf_copy_private_bfd_data
4083
4084 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
4085 #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
4086
4087 #define bfd_elf32_bfd_link_hash_table_create \
4088 elf_cris_link_hash_table_create
4089 #define elf_backend_adjust_dynamic_symbol \
4090 elf_cris_adjust_dynamic_symbol
4091 #define elf_backend_copy_indirect_symbol \
4092 elf_cris_copy_indirect_symbol
4093 #define elf_backend_size_dynamic_sections \
4094 elf_cris_size_dynamic_sections
4095 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4096 #define elf_backend_finish_dynamic_symbol \
4097 elf_cris_finish_dynamic_symbol
4098 #define elf_backend_finish_dynamic_sections \
4099 elf_cris_finish_dynamic_sections
4100 #define elf_backend_create_dynamic_sections \
4101 _bfd_elf_create_dynamic_sections
4102 #define bfd_elf32_bfd_final_link \
4103 bfd_elf_gc_common_final_link
4104 #define elf_backend_hide_symbol elf_cris_hide_symbol
4105 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
4106
4107 #define elf_backend_want_got_plt 1
4108 #define elf_backend_plt_readonly 1
4109 #define elf_backend_want_plt_sym 0
4110 #define elf_backend_got_header_size 12
4111 #define elf_backend_got_elt_size elf_cris_got_elt_size
4112 #define elf_backend_dtrel_excludes_plt 1
4113 #define elf_backend_want_dynrelro 1
4114
4115 /* Later, we my want to optimize RELA entries into REL entries for dynamic
4116 linking and libraries (if it's a win of any significance). Until then,
4117 take the easy route. */
4118 #define elf_backend_may_use_rel_p 0
4119 #define elf_backend_may_use_rela_p 1
4120 #define elf_backend_rela_normal 1
4121
4122 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4123
4124 #include "elf32-target.h"
4125
4126 #undef TARGET_LITTLE_SYM
4127 #undef TARGET_LITTLE_NAME
4128 #undef elf_symbol_leading_char
4129
4130 #define TARGET_LITTLE_SYM cris_elf32_us_vec
4131 #define TARGET_LITTLE_NAME "elf32-us-cris"
4132 #define elf_symbol_leading_char '_'
4133 #undef elf32_bed
4134 #define elf32_bed elf32_us_cris_bed
4135
4136 #include "elf32-target.h"
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