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Generate warning message if .endr is used without preceeding .rept/.irc/.irp
[binutils.git] / bfd / elf32-ppc.c
blobf3143497c3cff6fc74f47ed54cc79fd19a8aefe4
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21
22 /* This file is based on a preliminary PowerPC ELF ABI. The
23 information may not match the final PowerPC ELF ABI. It includes
24 suggestions from the in-progress Embedded PowerPC ABI, and that
25 information may also not match. */
26
27 #include "bfd.h"
28 #include "sysdep.h"
29 #include "bfdlink.h"
30 #include "libbfd.h"
31 #include "elf-bfd.h"
32 #include "elf/ppc.h"
33
34 #define USE_RELA /* we want RELA relocations, not REL */
35
36 static reloc_howto_type *ppc_elf_reloc_type_lookup
37 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
38 static void ppc_elf_info_to_howto
39 PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rela *dst));
40 static void ppc_elf_howto_init PARAMS ((void));
41 static int ppc_elf_sort_rela PARAMS ((const PTR, const PTR));
42 static boolean ppc_elf_relax_section
43 PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
44 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
45 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
46 static boolean ppc_elf_set_private_flags PARAMS ((bfd *, flagword));
47 static boolean ppc_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
48 static boolean ppc_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
49
50 static int ppc_elf_additional_program_headers PARAMS ((bfd *));
51 static boolean ppc_elf_modify_segment_map PARAMS ((bfd *));
52
53 static boolean ppc_elf_create_dynamic_sections
54 PARAMS ((bfd *, struct bfd_link_info *));
55
56 static boolean ppc_elf_section_from_shdr PARAMS ((bfd *,
57 Elf32_Internal_Shdr *,
58 char *));
59 static boolean ppc_elf_fake_sections
60 PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *));
61
62 static elf_linker_section_t *ppc_elf_create_linker_section
63 PARAMS ((bfd *abfd,
64 struct bfd_link_info *info,
65 enum elf_linker_section_enum));
66
67 static boolean ppc_elf_check_relocs PARAMS ((bfd *,
68 struct bfd_link_info *,
69 asection *,
70 const Elf_Internal_Rela *));
71
72 static asection * ppc_elf_gc_mark_hook PARAMS ((bfd *abfd,
73 struct bfd_link_info *info,
74 Elf_Internal_Rela *rel,
75 struct elf_link_hash_entry *h,
76 Elf_Internal_Sym *sym));
77
78 static boolean ppc_elf_gc_sweep_hook PARAMS ((bfd *abfd,
79 struct bfd_link_info *info,
80 asection *sec,
81 const Elf_Internal_Rela *relocs));
82
83 static boolean ppc_elf_adjust_dynamic_symbol PARAMS ((struct bfd_link_info *,
84 struct elf_link_hash_entry *));
85
86 static boolean ppc_elf_size_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *));
87
88 static boolean ppc_elf_relocate_section PARAMS ((bfd *,
89 struct bfd_link_info *info,
90 bfd *,
91 asection *,
92 bfd_byte *,
93 Elf_Internal_Rela *relocs,
94 Elf_Internal_Sym *local_syms,
95 asection **));
96
97 static boolean ppc_elf_add_symbol_hook PARAMS ((bfd *,
98 struct bfd_link_info *,
99 const Elf_Internal_Sym *,
100 const char **,
101 flagword *,
102 asection **,
103 bfd_vma *));
104
105 static boolean ppc_elf_finish_dynamic_symbol PARAMS ((bfd *,
106 struct bfd_link_info *,
107 struct elf_link_hash_entry *,
108 Elf_Internal_Sym *));
109
110 static boolean ppc_elf_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *));
111 static enum elf_reloc_type_class ppc_elf_reloc_type_class
112 PARAMS ((const Elf_Internal_Rela *));
113 static boolean ppc_elf_grok_prstatus
114 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
115 static boolean ppc_elf_grok_psinfo
116 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
117
118 #define BRANCH_PREDICT_BIT 0x200000 /* branch prediction bit for branch taken relocs */
119 #define RA_REGISTER_MASK 0x001f0000 /* mask to set RA in memory instructions */
120 #define RA_REGISTER_SHIFT 16 /* value to shift register by to insert RA */
121
122 /* The name of the dynamic interpreter. This is put in the .interp
123 section. */
124
125 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
126
127 /* The size in bytes of an entry in the procedure linkage table. */
128 #define PLT_ENTRY_SIZE 12
129 /* The initial size of the plt reserved for the dynamic linker. */
130 #define PLT_INITIAL_ENTRY_SIZE 72
131 /* The size of the gap between entries in the PLT. */
132 #define PLT_SLOT_SIZE 8
133 /* The number of single-slot PLT entries (the rest use two slots). */
134 #define PLT_NUM_SINGLE_ENTRIES 8192
135
136 /* Will references to this symbol always reference the symbol
137 in this object? */
138 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
139 ((! INFO->shared \
140 || INFO->symbolic \
141 || H->dynindx == -1 \
142 || ELF_ST_VISIBILITY (H->other) == STV_INTERNAL \
143 || ELF_ST_VISIBILITY (H->other) == STV_HIDDEN) \
144 && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
145
146 /* Will _calls_ to this symbol always call the version in this object? */
147 #define SYMBOL_CALLS_LOCAL(INFO, H) \
148 ((! INFO->shared \
149 || INFO->symbolic \
150 || H->dynindx == -1 \
151 || ELF_ST_VISIBILITY (H->other) != STV_DEFAULT) \
152 && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
153 \f
154 static reloc_howto_type *ppc_elf_howto_table[(int) R_PPC_max];
155
156 static reloc_howto_type ppc_elf_howto_raw[] = {
157 /* This reloc does nothing. */
158 HOWTO (R_PPC_NONE, /* type */
159 0, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 32, /* bitsize */
162 false, /* pc_relative */
163 0, /* bitpos */
164 complain_overflow_bitfield, /* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_PPC_NONE", /* name */
167 false, /* partial_inplace */
168 0, /* src_mask */
169 0, /* dst_mask */
170 false), /* pcrel_offset */
171
172 /* A standard 32 bit relocation. */
173 HOWTO (R_PPC_ADDR32, /* type */
174 0, /* rightshift */
175 2, /* size (0 = byte, 1 = short, 2 = long) */
176 32, /* bitsize */
177 false, /* pc_relative */
178 0, /* bitpos */
179 complain_overflow_bitfield, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_PPC_ADDR32", /* name */
182 false, /* partial_inplace */
183 0, /* src_mask */
184 0xffffffff, /* dst_mask */
185 false), /* pcrel_offset */
186
187 /* An absolute 26 bit branch; the lower two bits must be zero.
188 FIXME: we don't check that, we just clear them. */
189 HOWTO (R_PPC_ADDR24, /* type */
190 0, /* rightshift */
191 2, /* size (0 = byte, 1 = short, 2 = long) */
192 26, /* bitsize */
193 false, /* pc_relative */
194 0, /* bitpos */
195 complain_overflow_bitfield, /* complain_on_overflow */
196 bfd_elf_generic_reloc, /* special_function */
197 "R_PPC_ADDR24", /* name */
198 false, /* partial_inplace */
199 0, /* src_mask */
200 0x3fffffc, /* dst_mask */
201 false), /* pcrel_offset */
202
203 /* A standard 16 bit relocation. */
204 HOWTO (R_PPC_ADDR16, /* type */
205 0, /* rightshift */
206 1, /* size (0 = byte, 1 = short, 2 = long) */
207 16, /* bitsize */
208 false, /* pc_relative */
209 0, /* bitpos */
210 complain_overflow_bitfield, /* complain_on_overflow */
211 bfd_elf_generic_reloc, /* special_function */
212 "R_PPC_ADDR16", /* name */
213 false, /* partial_inplace */
214 0, /* src_mask */
215 0xffff, /* dst_mask */
216 false), /* pcrel_offset */
217
218 /* A 16 bit relocation without overflow. */
219 HOWTO (R_PPC_ADDR16_LO, /* type */
220 0, /* rightshift */
221 1, /* size (0 = byte, 1 = short, 2 = long) */
222 16, /* bitsize */
223 false, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_dont,/* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR16_LO", /* name */
228 false, /* partial_inplace */
229 0, /* src_mask */
230 0xffff, /* dst_mask */
231 false), /* pcrel_offset */
232
233 /* The high order 16 bits of an address. */
234 HOWTO (R_PPC_ADDR16_HI, /* type */
235 16, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 false, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_dont, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16_HI", /* name */
243 false, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 false), /* pcrel_offset */
247
248 /* The high order 16 bits of an address, plus 1 if the contents of
249 the low 16 bits, treated as a signed number, is negative. */
250 HOWTO (R_PPC_ADDR16_HA, /* type */
251 16, /* rightshift */
252 1, /* size (0 = byte, 1 = short, 2 = long) */
253 16, /* bitsize */
254 false, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_dont, /* complain_on_overflow */
257 ppc_elf_addr16_ha_reloc, /* special_function */
258 "R_PPC_ADDR16_HA", /* name */
259 false, /* partial_inplace */
260 0, /* src_mask */
261 0xffff, /* dst_mask */
262 false), /* pcrel_offset */
263
264 /* An absolute 16 bit branch; the lower two bits must be zero.
265 FIXME: we don't check that, we just clear them. */
266 HOWTO (R_PPC_ADDR14, /* type */
267 0, /* rightshift */
268 2, /* size (0 = byte, 1 = short, 2 = long) */
269 16, /* bitsize */
270 false, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_bitfield, /* complain_on_overflow */
273 bfd_elf_generic_reloc, /* special_function */
274 "R_PPC_ADDR14", /* name */
275 false, /* partial_inplace */
276 0, /* src_mask */
277 0xfffc, /* dst_mask */
278 false), /* pcrel_offset */
279
280 /* An absolute 16 bit branch, for which bit 10 should be set to
281 indicate that the branch is expected to be taken. The lower two
282 bits must be zero. */
283 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
284 0, /* rightshift */
285 2, /* size (0 = byte, 1 = short, 2 = long) */
286 16, /* bitsize */
287 false, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_bitfield, /* complain_on_overflow */
290 bfd_elf_generic_reloc, /* special_function */
291 "R_PPC_ADDR14_BRTAKEN",/* name */
292 false, /* partial_inplace */
293 0, /* src_mask */
294 0xfffc, /* dst_mask */
295 false), /* pcrel_offset */
296
297 /* An absolute 16 bit branch, for which bit 10 should be set to
298 indicate that the branch is not expected to be taken. The lower
299 two bits must be zero. */
300 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
301 0, /* rightshift */
302 2, /* size (0 = byte, 1 = short, 2 = long) */
303 16, /* bitsize */
304 false, /* pc_relative */
305 0, /* bitpos */
306 complain_overflow_bitfield, /* complain_on_overflow */
307 bfd_elf_generic_reloc, /* special_function */
308 "R_PPC_ADDR14_BRNTAKEN",/* name */
309 false, /* partial_inplace */
310 0, /* src_mask */
311 0xfffc, /* dst_mask */
312 false), /* pcrel_offset */
313
314 /* A relative 26 bit branch; the lower two bits must be zero. */
315 HOWTO (R_PPC_REL24, /* type */
316 0, /* rightshift */
317 2, /* size (0 = byte, 1 = short, 2 = long) */
318 26, /* bitsize */
319 true, /* pc_relative */
320 0, /* bitpos */
321 complain_overflow_signed, /* complain_on_overflow */
322 bfd_elf_generic_reloc, /* special_function */
323 "R_PPC_REL24", /* name */
324 false, /* partial_inplace */
325 0, /* src_mask */
326 0x3fffffc, /* dst_mask */
327 true), /* pcrel_offset */
328
329 /* A relative 16 bit branch; the lower two bits must be zero. */
330 HOWTO (R_PPC_REL14, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 true, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_REL14", /* name */
339 false, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 true), /* pcrel_offset */
343
344 /* A relative 16 bit branch. Bit 10 should be set to indicate that
345 the branch is expected to be taken. The lower two bits must be
346 zero. */
347 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 16, /* bitsize */
351 true, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_signed, /* complain_on_overflow */
354 bfd_elf_generic_reloc, /* special_function */
355 "R_PPC_REL14_BRTAKEN", /* name */
356 false, /* partial_inplace */
357 0, /* src_mask */
358 0xfffc, /* dst_mask */
359 true), /* pcrel_offset */
360
361 /* A relative 16 bit branch. Bit 10 should be set to indicate that
362 the branch is not expected to be taken. The lower two bits must
363 be zero. */
364 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
365 0, /* rightshift */
366 2, /* size (0 = byte, 1 = short, 2 = long) */
367 16, /* bitsize */
368 true, /* pc_relative */
369 0, /* bitpos */
370 complain_overflow_signed, /* complain_on_overflow */
371 bfd_elf_generic_reloc, /* special_function */
372 "R_PPC_REL14_BRNTAKEN",/* name */
373 false, /* partial_inplace */
374 0, /* src_mask */
375 0xfffc, /* dst_mask */
376 true), /* pcrel_offset */
377
378 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
379 symbol. */
380 HOWTO (R_PPC_GOT16, /* type */
381 0, /* rightshift */
382 1, /* size (0 = byte, 1 = short, 2 = long) */
383 16, /* bitsize */
384 false, /* pc_relative */
385 0, /* bitpos */
386 complain_overflow_signed, /* complain_on_overflow */
387 bfd_elf_generic_reloc, /* special_function */
388 "R_PPC_GOT16", /* name */
389 false, /* partial_inplace */
390 0, /* src_mask */
391 0xffff, /* dst_mask */
392 false), /* pcrel_offset */
393
394 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
395 the symbol. */
396 HOWTO (R_PPC_GOT16_LO, /* type */
397 0, /* rightshift */
398 1, /* size (0 = byte, 1 = short, 2 = long) */
399 16, /* bitsize */
400 false, /* pc_relative */
401 0, /* bitpos */
402 complain_overflow_dont, /* complain_on_overflow */
403 bfd_elf_generic_reloc, /* special_function */
404 "R_PPC_GOT16_LO", /* name */
405 false, /* partial_inplace */
406 0, /* src_mask */
407 0xffff, /* dst_mask */
408 false), /* pcrel_offset */
409
410 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
411 the symbol. */
412 HOWTO (R_PPC_GOT16_HI, /* type */
413 16, /* rightshift */
414 1, /* size (0 = byte, 1 = short, 2 = long) */
415 16, /* bitsize */
416 false, /* pc_relative */
417 0, /* bitpos */
418 complain_overflow_bitfield, /* complain_on_overflow */
419 bfd_elf_generic_reloc, /* special_function */
420 "R_PPC_GOT16_HI", /* name */
421 false, /* partial_inplace */
422 0, /* src_mask */
423 0xffff, /* dst_mask */
424 false), /* pcrel_offset */
425
426 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
427 the symbol. */
428 HOWTO (R_PPC_GOT16_HA, /* type */
429 16, /* rightshift */
430 1, /* size (0 = byte, 1 = short, 2 = long) */
431 16, /* bitsize */
432 false, /* pc_relative */
433 0, /* bitpos */
434 complain_overflow_bitfield, /* complain_on_overflow */
435 ppc_elf_addr16_ha_reloc, /* special_function */
436 "R_PPC_GOT16_HA", /* name */
437 false, /* partial_inplace */
438 0, /* src_mask */
439 0xffff, /* dst_mask */
440 false), /* pcrel_offset */
441
442 /* Like R_PPC_REL24, but referring to the procedure linkage table
443 entry for the symbol. */
444 HOWTO (R_PPC_PLTREL24, /* type */
445 0, /* rightshift */
446 2, /* size (0 = byte, 1 = short, 2 = long) */
447 26, /* bitsize */
448 true, /* pc_relative */
449 0, /* bitpos */
450 complain_overflow_signed, /* complain_on_overflow */
451 bfd_elf_generic_reloc, /* special_function */
452 "R_PPC_PLTREL24", /* name */
453 false, /* partial_inplace */
454 0, /* src_mask */
455 0x3fffffc, /* dst_mask */
456 true), /* pcrel_offset */
457
458 /* This is used only by the dynamic linker. The symbol should exist
459 both in the object being run and in some shared library. The
460 dynamic linker copies the data addressed by the symbol from the
461 shared library into the object, because the object being
462 run has to have the data at some particular address. */
463 HOWTO (R_PPC_COPY, /* type */
464 0, /* rightshift */
465 2, /* size (0 = byte, 1 = short, 2 = long) */
466 32, /* bitsize */
467 false, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_bitfield, /* complain_on_overflow */
470 bfd_elf_generic_reloc, /* special_function */
471 "R_PPC_COPY", /* name */
472 false, /* partial_inplace */
473 0, /* src_mask */
474 0, /* dst_mask */
475 false), /* pcrel_offset */
476
477 /* Like R_PPC_ADDR32, but used when setting global offset table
478 entries. */
479 HOWTO (R_PPC_GLOB_DAT, /* type */
480 0, /* rightshift */
481 2, /* size (0 = byte, 1 = short, 2 = long) */
482 32, /* bitsize */
483 false, /* pc_relative */
484 0, /* bitpos */
485 complain_overflow_bitfield, /* complain_on_overflow */
486 bfd_elf_generic_reloc, /* special_function */
487 "R_PPC_GLOB_DAT", /* name */
488 false, /* partial_inplace */
489 0, /* src_mask */
490 0xffffffff, /* dst_mask */
491 false), /* pcrel_offset */
492
493 /* Marks a procedure linkage table entry for a symbol. */
494 HOWTO (R_PPC_JMP_SLOT, /* type */
495 0, /* rightshift */
496 2, /* size (0 = byte, 1 = short, 2 = long) */
497 32, /* bitsize */
498 false, /* pc_relative */
499 0, /* bitpos */
500 complain_overflow_bitfield, /* complain_on_overflow */
501 bfd_elf_generic_reloc, /* special_function */
502 "R_PPC_JMP_SLOT", /* name */
503 false, /* partial_inplace */
504 0, /* src_mask */
505 0, /* dst_mask */
506 false), /* pcrel_offset */
507
508 /* Used only by the dynamic linker. When the object is run, this
509 longword is set to the load address of the object, plus the
510 addend. */
511 HOWTO (R_PPC_RELATIVE, /* type */
512 0, /* rightshift */
513 2, /* size (0 = byte, 1 = short, 2 = long) */
514 32, /* bitsize */
515 false, /* pc_relative */
516 0, /* bitpos */
517 complain_overflow_bitfield, /* complain_on_overflow */
518 bfd_elf_generic_reloc, /* special_function */
519 "R_PPC_RELATIVE", /* name */
520 false, /* partial_inplace */
521 0, /* src_mask */
522 0xffffffff, /* dst_mask */
523 false), /* pcrel_offset */
524
525 /* Like R_PPC_REL24, but uses the value of the symbol within the
526 object rather than the final value. Normally used for
527 _GLOBAL_OFFSET_TABLE_. */
528 HOWTO (R_PPC_LOCAL24PC, /* type */
529 0, /* rightshift */
530 2, /* size (0 = byte, 1 = short, 2 = long) */
531 26, /* bitsize */
532 true, /* pc_relative */
533 0, /* bitpos */
534 complain_overflow_signed, /* complain_on_overflow */
535 bfd_elf_generic_reloc, /* special_function */
536 "R_PPC_LOCAL24PC", /* name */
537 false, /* partial_inplace */
538 0, /* src_mask */
539 0x3fffffc, /* dst_mask */
540 true), /* pcrel_offset */
541
542 /* Like R_PPC_ADDR32, but may be unaligned. */
543 HOWTO (R_PPC_UADDR32, /* type */
544 0, /* rightshift */
545 2, /* size (0 = byte, 1 = short, 2 = long) */
546 32, /* bitsize */
547 false, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_bitfield, /* complain_on_overflow */
550 bfd_elf_generic_reloc, /* special_function */
551 "R_PPC_UADDR32", /* name */
552 false, /* partial_inplace */
553 0, /* src_mask */
554 0xffffffff, /* dst_mask */
555 false), /* pcrel_offset */
556
557 /* Like R_PPC_ADDR16, but may be unaligned. */
558 HOWTO (R_PPC_UADDR16, /* type */
559 0, /* rightshift */
560 1, /* size (0 = byte, 1 = short, 2 = long) */
561 16, /* bitsize */
562 false, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_bitfield, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_UADDR16", /* name */
567 false, /* partial_inplace */
568 0, /* src_mask */
569 0xffff, /* dst_mask */
570 false), /* pcrel_offset */
571
572 /* 32-bit PC relative */
573 HOWTO (R_PPC_REL32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 true, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_bitfield, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_REL32", /* name */
582 false, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 true), /* pcrel_offset */
586
587 /* 32-bit relocation to the symbol's procedure linkage table.
588 FIXME: not supported. */
589 HOWTO (R_PPC_PLT32, /* type */
590 0, /* rightshift */
591 2, /* size (0 = byte, 1 = short, 2 = long) */
592 32, /* bitsize */
593 false, /* pc_relative */
594 0, /* bitpos */
595 complain_overflow_bitfield, /* complain_on_overflow */
596 bfd_elf_generic_reloc, /* special_function */
597 "R_PPC_PLT32", /* name */
598 false, /* partial_inplace */
599 0, /* src_mask */
600 0, /* dst_mask */
601 false), /* pcrel_offset */
602
603 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
604 FIXME: not supported. */
605 HOWTO (R_PPC_PLTREL32, /* type */
606 0, /* rightshift */
607 2, /* size (0 = byte, 1 = short, 2 = long) */
608 32, /* bitsize */
609 true, /* pc_relative */
610 0, /* bitpos */
611 complain_overflow_bitfield, /* complain_on_overflow */
612 bfd_elf_generic_reloc, /* special_function */
613 "R_PPC_PLTREL32", /* name */
614 false, /* partial_inplace */
615 0, /* src_mask */
616 0, /* dst_mask */
617 true), /* pcrel_offset */
618
619 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
620 the symbol. */
621 HOWTO (R_PPC_PLT16_LO, /* type */
622 0, /* rightshift */
623 1, /* size (0 = byte, 1 = short, 2 = long) */
624 16, /* bitsize */
625 false, /* pc_relative */
626 0, /* bitpos */
627 complain_overflow_dont, /* complain_on_overflow */
628 bfd_elf_generic_reloc, /* special_function */
629 "R_PPC_PLT16_LO", /* name */
630 false, /* partial_inplace */
631 0, /* src_mask */
632 0xffff, /* dst_mask */
633 false), /* pcrel_offset */
634
635 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
636 the symbol. */
637 HOWTO (R_PPC_PLT16_HI, /* type */
638 16, /* rightshift */
639 1, /* size (0 = byte, 1 = short, 2 = long) */
640 16, /* bitsize */
641 false, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_bitfield, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC_PLT16_HI", /* name */
646 false, /* partial_inplace */
647 0, /* src_mask */
648 0xffff, /* dst_mask */
649 false), /* pcrel_offset */
650
651 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
652 the symbol. */
653 HOWTO (R_PPC_PLT16_HA, /* type */
654 16, /* rightshift */
655 1, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 false, /* pc_relative */
658 0, /* bitpos */
659 complain_overflow_bitfield, /* complain_on_overflow */
660 ppc_elf_addr16_ha_reloc, /* special_function */
661 "R_PPC_PLT16_HA", /* name */
662 false, /* partial_inplace */
663 0, /* src_mask */
664 0xffff, /* dst_mask */
665 false), /* pcrel_offset */
666
667 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
668 small data items. */
669 HOWTO (R_PPC_SDAREL16, /* type */
670 0, /* rightshift */
671 1, /* size (0 = byte, 1 = short, 2 = long) */
672 16, /* bitsize */
673 false, /* pc_relative */
674 0, /* bitpos */
675 complain_overflow_signed, /* complain_on_overflow */
676 bfd_elf_generic_reloc, /* special_function */
677 "R_PPC_SDAREL16", /* name */
678 false, /* partial_inplace */
679 0, /* src_mask */
680 0xffff, /* dst_mask */
681 false), /* pcrel_offset */
682
683 /* 32-bit section relative relocation. */
684 HOWTO (R_PPC_SECTOFF, /* type */
685 0, /* rightshift */
686 2, /* size (0 = byte, 1 = short, 2 = long) */
687 32, /* bitsize */
688 true, /* pc_relative */
689 0, /* bitpos */
690 complain_overflow_bitfield, /* complain_on_overflow */
691 bfd_elf_generic_reloc, /* special_function */
692 "R_PPC_SECTOFF", /* name */
693 false, /* partial_inplace */
694 0, /* src_mask */
695 0, /* dst_mask */
696 true), /* pcrel_offset */
697
698 /* 16-bit lower half section relative relocation. */
699 HOWTO (R_PPC_SECTOFF_LO, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 false, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_dont, /* complain_on_overflow */
706 bfd_elf_generic_reloc, /* special_function */
707 "R_PPC_SECTOFF_LO", /* name */
708 false, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 false), /* pcrel_offset */
712
713 /* 16-bit upper half section relative relocation. */
714 HOWTO (R_PPC_SECTOFF_HI, /* type */
715 16, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 false, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_bitfield, /* complain_on_overflow */
721 bfd_elf_generic_reloc, /* special_function */
722 "R_PPC_SECTOFF_HI", /* name */
723 false, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 false), /* pcrel_offset */
727
728 /* 16-bit upper half adjusted section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_HA, /* type */
730 16, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 false, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_bitfield, /* complain_on_overflow */
736 ppc_elf_addr16_ha_reloc, /* special_function */
737 "R_PPC_SECTOFF_HA", /* name */
738 false, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 false), /* pcrel_offset */
742
743 /* The remaining relocs are from the Embedded ELF ABI, and are not
744 in the SVR4 ELF ABI. */
745
746 /* 32 bit value resulting from the addend minus the symbol */
747 HOWTO (R_PPC_EMB_NADDR32, /* type */
748 0, /* rightshift */
749 2, /* size (0 = byte, 1 = short, 2 = long) */
750 32, /* bitsize */
751 false, /* pc_relative */
752 0, /* bitpos */
753 complain_overflow_bitfield, /* complain_on_overflow */
754 bfd_elf_generic_reloc, /* special_function */
755 "R_PPC_EMB_NADDR32", /* name */
756 false, /* partial_inplace */
757 0, /* src_mask */
758 0xffffffff, /* dst_mask */
759 false), /* pcrel_offset */
760
761 /* 16 bit value resulting from the addend minus the symbol */
762 HOWTO (R_PPC_EMB_NADDR16, /* type */
763 0, /* rightshift */
764 1, /* size (0 = byte, 1 = short, 2 = long) */
765 16, /* bitsize */
766 false, /* pc_relative */
767 0, /* bitpos */
768 complain_overflow_bitfield, /* complain_on_overflow */
769 bfd_elf_generic_reloc, /* special_function */
770 "R_PPC_EMB_NADDR16", /* name */
771 false, /* partial_inplace */
772 0, /* src_mask */
773 0xffff, /* dst_mask */
774 false), /* pcrel_offset */
775
776 /* 16 bit value resulting from the addend minus the symbol */
777 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
778 0, /* rightshift */
779 1, /* size (0 = byte, 1 = short, 2 = long) */
780 16, /* bitsize */
781 false, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_dont,/* complain_on_overflow */
784 bfd_elf_generic_reloc, /* special_function */
785 "R_PPC_EMB_ADDR16_LO", /* name */
786 false, /* partial_inplace */
787 0, /* src_mask */
788 0xffff, /* dst_mask */
789 false), /* pcrel_offset */
790
791 /* The high order 16 bits of the addend minus the symbol */
792 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
793 16, /* rightshift */
794 1, /* size (0 = byte, 1 = short, 2 = long) */
795 16, /* bitsize */
796 false, /* pc_relative */
797 0, /* bitpos */
798 complain_overflow_dont, /* complain_on_overflow */
799 bfd_elf_generic_reloc, /* special_function */
800 "R_PPC_EMB_NADDR16_HI", /* name */
801 false, /* partial_inplace */
802 0, /* src_mask */
803 0xffff, /* dst_mask */
804 false), /* pcrel_offset */
805
806 /* The high order 16 bits of the result of the addend minus the address,
807 plus 1 if the contents of the low 16 bits, treated as a signed number,
808 is negative. */
809 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
810 16, /* rightshift */
811 1, /* size (0 = byte, 1 = short, 2 = long) */
812 16, /* bitsize */
813 false, /* pc_relative */
814 0, /* bitpos */
815 complain_overflow_dont, /* complain_on_overflow */
816 ppc_elf_addr16_ha_reloc, /* special_function */
817 "R_PPC_EMB_NADDR16_HA", /* name */
818 false, /* partial_inplace */
819 0, /* src_mask */
820 0xffff, /* dst_mask */
821 false), /* pcrel_offset */
822
823 /* 16 bit value resulting from allocating a 4 byte word to hold an
824 address in the .sdata section, and returning the offset from
825 _SDA_BASE_ for that relocation */
826 HOWTO (R_PPC_EMB_SDAI16, /* type */
827 0, /* rightshift */
828 1, /* size (0 = byte, 1 = short, 2 = long) */
829 16, /* bitsize */
830 false, /* pc_relative */
831 0, /* bitpos */
832 complain_overflow_bitfield, /* complain_on_overflow */
833 bfd_elf_generic_reloc, /* special_function */
834 "R_PPC_EMB_SDAI16", /* name */
835 false, /* partial_inplace */
836 0, /* src_mask */
837 0xffff, /* dst_mask */
838 false), /* pcrel_offset */
839
840 /* 16 bit value resulting from allocating a 4 byte word to hold an
841 address in the .sdata2 section, and returning the offset from
842 _SDA2_BASE_ for that relocation */
843 HOWTO (R_PPC_EMB_SDA2I16, /* type */
844 0, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 false, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_bitfield, /* complain_on_overflow */
850 bfd_elf_generic_reloc, /* special_function */
851 "R_PPC_EMB_SDA2I16", /* name */
852 false, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 false), /* pcrel_offset */
856
857 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
858 small data items. */
859 HOWTO (R_PPC_EMB_SDA2REL, /* type */
860 0, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 false, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_signed, /* complain_on_overflow */
866 bfd_elf_generic_reloc, /* special_function */
867 "R_PPC_EMB_SDA2REL", /* name */
868 false, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 false), /* pcrel_offset */
872
873 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
874 signed offset from the appropriate base, and filling in the register
875 field with the appropriate register (0, 2, or 13). */
876 HOWTO (R_PPC_EMB_SDA21, /* type */
877 0, /* rightshift */
878 2, /* size (0 = byte, 1 = short, 2 = long) */
879 16, /* bitsize */
880 false, /* pc_relative */
881 0, /* bitpos */
882 complain_overflow_signed, /* complain_on_overflow */
883 bfd_elf_generic_reloc, /* special_function */
884 "R_PPC_EMB_SDA21", /* name */
885 false, /* partial_inplace */
886 0, /* src_mask */
887 0xffff, /* dst_mask */
888 false), /* pcrel_offset */
889
890 /* Relocation not handled: R_PPC_EMB_MRKREF */
891 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
892 /* Relocation not handled: R_PPC_EMB_RELST_LO */
893 /* Relocation not handled: R_PPC_EMB_RELST_HI */
894 /* Relocation not handled: R_PPC_EMB_RELST_HA */
895 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
896
897 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
898 in the 16 bit signed offset from the appropriate base, and filling in the
899 register field with the appropriate register (0, 2, or 13). */
900 HOWTO (R_PPC_EMB_RELSDA, /* type */
901 0, /* rightshift */
902 1, /* size (0 = byte, 1 = short, 2 = long) */
903 16, /* bitsize */
904 true, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_signed, /* complain_on_overflow */
907 bfd_elf_generic_reloc, /* special_function */
908 "R_PPC_EMB_RELSDA", /* name */
909 false, /* partial_inplace */
910 0, /* src_mask */
911 0xffff, /* dst_mask */
912 false), /* pcrel_offset */
913
914 /* GNU extension to record C++ vtable hierarchy */
915 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
916 0, /* rightshift */
917 0, /* size (0 = byte, 1 = short, 2 = long) */
918 0, /* bitsize */
919 false, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_dont, /* complain_on_overflow */
922 NULL, /* special_function */
923 "R_PPC_GNU_VTINHERIT", /* name */
924 false, /* partial_inplace */
925 0, /* src_mask */
926 0, /* dst_mask */
927 false), /* pcrel_offset */
928
929 /* GNU extension to record C++ vtable member usage */
930 HOWTO (R_PPC_GNU_VTENTRY, /* type */
931 0, /* rightshift */
932 0, /* size (0 = byte, 1 = short, 2 = long) */
933 0, /* bitsize */
934 false, /* pc_relative */
935 0, /* bitpos */
936 complain_overflow_dont, /* complain_on_overflow */
937 NULL, /* special_function */
938 "R_PPC_GNU_VTENTRY", /* name */
939 false, /* partial_inplace */
940 0, /* src_mask */
941 0, /* dst_mask */
942 false), /* pcrel_offset */
943
944 /* Phony reloc to handle AIX style TOC entries */
945 HOWTO (R_PPC_TOC16, /* type */
946 0, /* rightshift */
947 1, /* size (0 = byte, 1 = short, 2 = long) */
948 16, /* bitsize */
949 false, /* pc_relative */
950 0, /* bitpos */
951 complain_overflow_signed, /* complain_on_overflow */
952 bfd_elf_generic_reloc, /* special_function */
953 "R_PPC_TOC16", /* name */
954 false, /* partial_inplace */
955 0, /* src_mask */
956 0xffff, /* dst_mask */
957 false), /* pcrel_offset */
958 };
959 \f
960 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
961
962 static void
963 ppc_elf_howto_init ()
964 {
965 unsigned int i, type;
966
967 for (i = 0; i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); i++)
968 {
969 type = ppc_elf_howto_raw[i].type;
970 BFD_ASSERT (type < sizeof (ppc_elf_howto_table) / sizeof (ppc_elf_howto_table[0]));
971 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
972 }
973 }
974 \f
975 /* This function handles relaxing for the PPC with option --mpc860c0[=<n>].
976
977 The MPC860, revision C0 or earlier contains a bug in the die.
978 If all of the following conditions are true, the next instruction
979 to be executed *may* be treated as a no-op.
980 1/ A forward branch is executed.
981 2/ The branch is predicted as not taken.
982 3/ The branch is taken.
983 4/ The branch is located in the last 5 words of a page.
984 (The EOP limit is 5 by default but may be specified as any value from 1-10.)
985
986 Our software solution is to detect these problematic branches in a
987 linker pass and modify them as follows:
988 1/ Unconditional branches - Since these are always predicted taken,
989 there is no problem and no action is required.
990 2/ Conditional backward branches - No problem, no action required.
991 3/ Conditional forward branches - Ensure that the "inverse prediction
992 bit" is set (ensure it is predicted taken).
993 4/ Conditional register branches - Ensure that the "y bit" is set
994 (ensure it is predicted taken).
995 */
996
997 /* Sort sections by address. */
998
999 static int
1000 ppc_elf_sort_rela (arg1, arg2)
1001 const PTR arg1;
1002 const PTR arg2;
1003 {
1004 const Elf_Internal_Rela **rela1 = (const Elf_Internal_Rela**) arg1;
1005 const Elf_Internal_Rela **rela2 = (const Elf_Internal_Rela**) arg2;
1006
1007 /* Sort by offset. */
1008 return ((*rela1)->r_offset - (*rela2)->r_offset);
1009 }
1010
1011 static boolean
1012 ppc_elf_relax_section (abfd, isec, link_info, again)
1013 bfd *abfd;
1014 asection *isec;
1015 struct bfd_link_info *link_info;
1016 boolean *again;
1017 {
1018 #define PAGESIZE 0x1000
1019
1020 bfd_byte *contents = NULL;
1021 bfd_byte *free_contents = NULL;
1022 Elf_Internal_Rela *internal_relocs = NULL;
1023 Elf_Internal_Rela *free_relocs = NULL;
1024 Elf_Internal_Rela **rela_comb = NULL;
1025 int comb_curr, comb_count;
1026
1027 /* We never have to do this more than once per input section. */
1028 *again = false;
1029
1030 /* If needed, initialize this section's cooked size. */
1031 if (isec->_cooked_size == 0)
1032 isec->_cooked_size = isec->_raw_size;
1033
1034 /* We're only interested in text sections which overlap the
1035 troublesome area at the end of a page. */
1036 if (link_info->mpc860c0 && (isec->flags & SEC_CODE) && isec->_cooked_size)
1037 {
1038 bfd_vma dot, end_page, end_section;
1039 boolean section_modified;
1040
1041 /* Get the section contents. */
1042 /* Get cached copy if it exists. */
1043 if (elf_section_data (isec)->this_hdr.contents != NULL)
1044 contents = elf_section_data (isec)->this_hdr.contents;
1045 else
1046 {
1047 /* Go get them off disk. */
1048 contents = (bfd_byte *) bfd_malloc (isec->_raw_size);
1049 if (contents == NULL)
1050 goto error_return;
1051 free_contents = contents;
1052
1053 if (! bfd_get_section_contents (abfd, isec, contents,
1054 (file_ptr) 0, isec->_raw_size))
1055 goto error_return;
1056 }
1057
1058 comb_curr = 0;
1059 comb_count = 0;
1060 if (isec->reloc_count)
1061 {
1062 unsigned n;
1063 bfd_size_type amt;
1064
1065 /* Get a copy of the native relocations. */
1066 internal_relocs = _bfd_elf32_link_read_relocs (
1067 abfd, isec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
1068 link_info->keep_memory);
1069 if (internal_relocs == NULL)
1070 goto error_return;
1071 if (! link_info->keep_memory)
1072 free_relocs = internal_relocs;
1073
1074 /* Setup a faster access method for the reloc info we need. */
1075 amt = isec->reloc_count;
1076 amt *= sizeof (Elf_Internal_Rela*);
1077 rela_comb = (Elf_Internal_Rela**) bfd_malloc (amt);
1078 if (rela_comb == NULL)
1079 goto error_return;
1080 for (n = 0; n < isec->reloc_count; ++n)
1081 {
1082 long r_type;
1083
1084 r_type = ELF32_R_TYPE (internal_relocs[n].r_info);
1085 if (r_type < 0 || r_type >= (int) R_PPC_max)
1086 goto error_return;
1087
1088 /* Prologue constants are sometimes present in the ".text"
1089 sections and they can be identified by their associated relocation.
1090 We don't want to process those words and some others which
1091 can also be identified by their relocations. However, not all
1092 conditional branches will have a relocation so we will
1093 only ignore words that 1) have a reloc, and 2) the reloc
1094 is not applicable to a conditional branch.
1095 The array rela_comb is built here for use in the EOP scan loop. */
1096 switch (r_type)
1097 {
1098 case R_PPC_ADDR14_BRNTAKEN: /* absolute, predicted not taken */
1099 case R_PPC_REL14: /* relative cond. br. */
1100 case R_PPC_REL14_BRNTAKEN: /* rel. cond. br., predicted not taken */
1101 /* We should check the instruction. */
1102 break;
1103 default:
1104 /* The word is not a conditional branch - ignore it. */
1105 rela_comb[comb_count++] = &internal_relocs[n];
1106 break;
1107 }
1108 }
1109 if (comb_count > 1)
1110 qsort (rela_comb, (size_t) comb_count, sizeof (int), ppc_elf_sort_rela);
1111 }
1112
1113 /* Enumerate each EOP region that overlaps this section. */
1114 end_section = isec->vma + isec->_cooked_size;
1115 dot = end_page = (isec->vma | (PAGESIZE - 1)) + 1;
1116 dot -= link_info->mpc860c0;
1117 section_modified = false;
1118 if (dot < isec->vma) /* Increment the start position if this section */
1119 dot = isec->vma; /* begins in the middle of its first EOP region. */
1120 for (;
1121 dot < end_section;
1122 dot += PAGESIZE, end_page += PAGESIZE)
1123 {
1124
1125 /* Check each word in this EOP region. */
1126 for (; dot < end_page; dot += 4)
1127 {
1128 bfd_vma isec_offset;
1129 unsigned long insn;
1130 boolean skip, modified;
1131
1132 /* Don't process this word if there is a relocation for it and
1133 the relocation indicates the word is not a conditional branch. */
1134 skip = false;
1135 isec_offset = dot - isec->vma;
1136 for (; comb_curr<comb_count; ++comb_curr)
1137 {
1138 bfd_vma r_offset;
1139
1140 r_offset = rela_comb[comb_curr]->r_offset;
1141 if (r_offset >= isec_offset)
1142 {
1143 if (r_offset == isec_offset) skip = true;
1144 break;
1145 }
1146 }
1147 if (skip) continue;
1148
1149 /* Check the current word for a problematic conditional branch. */
1150 #define BO0(insn) ((insn) & 0x02000000)
1151 #define BO2(insn) ((insn) & 0x00800000)
1152 #define BO4(insn) ((insn) & 0x00200000)
1153 insn = (unsigned long) bfd_get_32 (abfd, contents + isec_offset);
1154 modified = false;
1155 if ((insn & 0xFc000000) == 0x40000000)
1156 {
1157 /* Instruction is BCx */
1158 if ((!BO0(insn) || !BO2(insn)) && !BO4(insn))
1159 {
1160 bfd_vma target;
1161 /* This branch is predicted as "normal".
1162 If this is a forward branch, it is problematic. */
1163
1164 target = insn & 0x0000Fffc; /*extract*/
1165 target = (target ^ 0x8000) - 0x8000; /*sign extend*/
1166 if ((insn & 0x00000002) == 0)
1167 target += dot; /*convert to abs*/
1168 if (target > dot)
1169 {
1170 insn |= 0x00200000; /* set the prediction bit */
1171 modified = true;
1172 }
1173 }
1174 }
1175 else if ((insn & 0xFc00Fffe) == 0x4c000420)
1176 {
1177 /* Instruction is BCCTRx */
1178 if ((!BO0(insn) || !BO2(insn)) && !BO4(insn))
1179 {
1180 /* This branch is predicted as not-taken.
1181 If this is a forward branch, it is problematic.
1182 Since we can't tell statically if it will branch forward,
1183 always set the prediction bit. */
1184 insn |= 0x00200000; /* set the prediction bit */
1185 modified = true;
1186 }
1187 }
1188 else if ((insn & 0xFc00Fffe) == 0x4c000020)
1189 {
1190 /* Instruction is BCLRx */
1191 if ((!BO0(insn) || !BO2(insn)) && !BO4(insn))
1192 {
1193 /* This branch is predicted as not-taken.
1194 If this is a forward branch, it is problematic.
1195 Since we can't tell statically if it will branch forward,
1196 always set the prediction bit. */
1197 insn |= 0x00200000; /* set the prediction bit */
1198 modified = true;
1199 }
1200 }
1201 #undef BO0
1202 #undef BO2
1203 #undef BO4
1204 if (modified)
1205 {
1206 bfd_put_32 (abfd, (bfd_vma) insn, contents + isec_offset);
1207 section_modified = true;
1208 }
1209 }
1210 }
1211 if (section_modified)
1212 {
1213 elf_section_data (isec)->this_hdr.contents = contents;
1214 free_contents = NULL;
1215 }
1216 }
1217
1218 if (rela_comb != NULL)
1219 {
1220 free (rela_comb);
1221 rela_comb = NULL;
1222 }
1223
1224 if (free_relocs != NULL)
1225 {
1226 free (free_relocs);
1227 free_relocs = NULL;
1228 }
1229
1230 if (free_contents != NULL)
1231 {
1232 if (! link_info->keep_memory)
1233 free (free_contents);
1234 else
1235 {
1236 /* Cache the section contents for elf_link_input_bfd. */
1237 elf_section_data (isec)->this_hdr.contents = contents;
1238 }
1239 free_contents = NULL;
1240 }
1241
1242 return true;
1243
1244 error_return:
1245 if (rela_comb != NULL)
1246 free (rela_comb);
1247 if (free_relocs != NULL)
1248 free (free_relocs);
1249 if (free_contents != NULL)
1250 free (free_contents);
1251 return false;
1252 }
1253 \f
1254 static reloc_howto_type *
1255 ppc_elf_reloc_type_lookup (abfd, code)
1256 bfd *abfd ATTRIBUTE_UNUSED;
1257 bfd_reloc_code_real_type code;
1258 {
1259 enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE;
1260
1261 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1262 /* Initialize howto table if needed. */
1263 ppc_elf_howto_init ();
1264
1265 switch ((int) code)
1266 {
1267 default:
1268 return (reloc_howto_type *) NULL;
1269
1270 case BFD_RELOC_NONE: ppc_reloc = R_PPC_NONE; break;
1271 case BFD_RELOC_32: ppc_reloc = R_PPC_ADDR32; break;
1272 case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC_ADDR24; break;
1273 case BFD_RELOC_16: ppc_reloc = R_PPC_ADDR16; break;
1274 case BFD_RELOC_LO16: ppc_reloc = R_PPC_ADDR16_LO; break;
1275 case BFD_RELOC_HI16: ppc_reloc = R_PPC_ADDR16_HI; break;
1276 case BFD_RELOC_HI16_S: ppc_reloc = R_PPC_ADDR16_HA; break;
1277 case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC_ADDR14; break;
1278 case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC_ADDR14_BRTAKEN; break;
1279 case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC_ADDR14_BRNTAKEN; break;
1280 case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC_REL24; break;
1281 case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC_REL14; break;
1282 case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC_REL14_BRTAKEN; break;
1283 case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC_REL14_BRNTAKEN; break;
1284 case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC_GOT16; break;
1285 case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC_GOT16_LO; break;
1286 case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC_GOT16_HI; break;
1287 case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC_GOT16_HA; break;
1288 case BFD_RELOC_24_PLT_PCREL: ppc_reloc = R_PPC_PLTREL24; break;
1289 case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC_COPY; break;
1290 case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC_GLOB_DAT; break;
1291 case BFD_RELOC_PPC_LOCAL24PC: ppc_reloc = R_PPC_LOCAL24PC; break;
1292 case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC_REL32; break;
1293 case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC_PLT32; break;
1294 case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC_PLTREL32; break;
1295 case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC_PLT16_LO; break;
1296 case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC_PLT16_HI; break;
1297 case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC_PLT16_HA; break;
1298 case BFD_RELOC_GPREL16: ppc_reloc = R_PPC_SDAREL16; break;
1299 case BFD_RELOC_32_BASEREL: ppc_reloc = R_PPC_SECTOFF; break;
1300 case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC_SECTOFF_LO; break;
1301 case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC_SECTOFF_HI; break;
1302 case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC_SECTOFF_HA; break;
1303 case BFD_RELOC_CTOR: ppc_reloc = R_PPC_ADDR32; break;
1304 case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC_TOC16; break;
1305 case BFD_RELOC_PPC_EMB_NADDR32: ppc_reloc = R_PPC_EMB_NADDR32; break;
1306 case BFD_RELOC_PPC_EMB_NADDR16: ppc_reloc = R_PPC_EMB_NADDR16; break;
1307 case BFD_RELOC_PPC_EMB_NADDR16_LO: ppc_reloc = R_PPC_EMB_NADDR16_LO; break;
1308 case BFD_RELOC_PPC_EMB_NADDR16_HI: ppc_reloc = R_PPC_EMB_NADDR16_HI; break;
1309 case BFD_RELOC_PPC_EMB_NADDR16_HA: ppc_reloc = R_PPC_EMB_NADDR16_HA; break;
1310 case BFD_RELOC_PPC_EMB_SDAI16: ppc_reloc = R_PPC_EMB_SDAI16; break;
1311 case BFD_RELOC_PPC_EMB_SDA2I16: ppc_reloc = R_PPC_EMB_SDA2I16; break;
1312 case BFD_RELOC_PPC_EMB_SDA2REL: ppc_reloc = R_PPC_EMB_SDA2REL; break;
1313 case BFD_RELOC_PPC_EMB_SDA21: ppc_reloc = R_PPC_EMB_SDA21; break;
1314 case BFD_RELOC_PPC_EMB_MRKREF: ppc_reloc = R_PPC_EMB_MRKREF; break;
1315 case BFD_RELOC_PPC_EMB_RELSEC16: ppc_reloc = R_PPC_EMB_RELSEC16; break;
1316 case BFD_RELOC_PPC_EMB_RELST_LO: ppc_reloc = R_PPC_EMB_RELST_LO; break;
1317 case BFD_RELOC_PPC_EMB_RELST_HI: ppc_reloc = R_PPC_EMB_RELST_HI; break;
1318 case BFD_RELOC_PPC_EMB_RELST_HA: ppc_reloc = R_PPC_EMB_RELST_HA; break;
1319 case BFD_RELOC_PPC_EMB_BIT_FLD: ppc_reloc = R_PPC_EMB_BIT_FLD; break;
1320 case BFD_RELOC_PPC_EMB_RELSDA: ppc_reloc = R_PPC_EMB_RELSDA; break;
1321 case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC_GNU_VTINHERIT; break;
1322 case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC_GNU_VTENTRY; break;
1323 }
1324
1325 return ppc_elf_howto_table[(int) ppc_reloc];
1326 };
1327
1328 /* Set the howto pointer for a PowerPC ELF reloc. */
1329
1330 static void
1331 ppc_elf_info_to_howto (abfd, cache_ptr, dst)
1332 bfd *abfd ATTRIBUTE_UNUSED;
1333 arelent *cache_ptr;
1334 Elf32_Internal_Rela *dst;
1335 {
1336 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1337 /* Initialize howto table if needed. */
1338 ppc_elf_howto_init ();
1339
1340 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1341 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1342 }
1343
1344 /* Handle the R_PPC_ADDR16_HA reloc. */
1345
1346 static bfd_reloc_status_type
1347 ppc_elf_addr16_ha_reloc (abfd, reloc_entry, symbol, data, input_section,
1348 output_bfd, error_message)
1349 bfd *abfd ATTRIBUTE_UNUSED;
1350 arelent *reloc_entry;
1351 asymbol *symbol;
1352 PTR data ATTRIBUTE_UNUSED;
1353 asection *input_section;
1354 bfd *output_bfd;
1355 char **error_message ATTRIBUTE_UNUSED;
1356 {
1357 bfd_vma relocation;
1358
1359 if (output_bfd != NULL)
1360 {
1361 reloc_entry->address += input_section->output_offset;
1362 return bfd_reloc_ok;
1363 }
1364
1365 if (reloc_entry->address > input_section->_cooked_size)
1366 return bfd_reloc_outofrange;
1367
1368 if (bfd_is_com_section (symbol->section))
1369 relocation = 0;
1370 else
1371 relocation = symbol->value;
1372
1373 relocation += symbol->section->output_section->vma;
1374 relocation += symbol->section->output_offset;
1375 relocation += reloc_entry->addend;
1376
1377 reloc_entry->addend += (relocation & 0x8000) << 1;
1378
1379 return bfd_reloc_continue;
1380 }
1381
1382 /* Function to set whether a module needs the -mrelocatable bit set. */
1383
1384 static boolean
1385 ppc_elf_set_private_flags (abfd, flags)
1386 bfd *abfd;
1387 flagword flags;
1388 {
1389 BFD_ASSERT (!elf_flags_init (abfd)
1390 || elf_elfheader (abfd)->e_flags == flags);
1391
1392 elf_elfheader (abfd)->e_flags = flags;
1393 elf_flags_init (abfd) = true;
1394 return true;
1395 }
1396
1397 /* Copy backend specific data from one object module to another */
1398 static boolean
1399 ppc_elf_copy_private_bfd_data (ibfd, obfd)
1400 bfd *ibfd;
1401 bfd *obfd;
1402 {
1403 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1404 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1405 return true;
1406
1407 BFD_ASSERT (!elf_flags_init (obfd)
1408 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
1409
1410 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1411 elf_flags_init (obfd) = true;
1412 return true;
1413 }
1414
1415 /* Merge backend specific data from an object file to the output
1416 object file when linking */
1417 static boolean
1418 ppc_elf_merge_private_bfd_data (ibfd, obfd)
1419 bfd *ibfd;
1420 bfd *obfd;
1421 {
1422 flagword old_flags;
1423 flagword new_flags;
1424 boolean error;
1425
1426 /* Check if we have the same endianess */
1427 if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
1428 return false;
1429
1430 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1431 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1432 return true;
1433
1434 new_flags = elf_elfheader (ibfd)->e_flags;
1435 old_flags = elf_elfheader (obfd)->e_flags;
1436 if (!elf_flags_init (obfd)) /* First call, no flags set */
1437 {
1438 elf_flags_init (obfd) = true;
1439 elf_elfheader (obfd)->e_flags = new_flags;
1440 }
1441
1442 else if (new_flags == old_flags) /* Compatible flags are ok */
1443 ;
1444
1445 else /* Incompatible flags */
1446 {
1447 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib to be linked
1448 with either. */
1449 error = false;
1450 if ((new_flags & EF_PPC_RELOCATABLE) != 0
1451 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
1452 {
1453 error = true;
1454 (*_bfd_error_handler)
1455 (_("%s: compiled with -mrelocatable and linked with modules compiled normally"),
1456 bfd_archive_filename (ibfd));
1457 }
1458 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
1459 && (old_flags & EF_PPC_RELOCATABLE) != 0)
1460 {
1461 error = true;
1462 (*_bfd_error_handler)
1463 (_("%s: compiled normally and linked with modules compiled with -mrelocatable"),
1464 bfd_archive_filename (ibfd));
1465 }
1466
1467 /* The output is -mrelocatable-lib iff both the input files are. */
1468 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
1469 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
1470
1471 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
1472 but each input file is either -mrelocatable or -mrelocatable-lib. */
1473 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
1474 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
1475 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
1476 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
1477
1478 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if any module uses it */
1479 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
1480
1481 new_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
1482 old_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
1483
1484 /* Warn about any other mismatches */
1485 if (new_flags != old_flags)
1486 {
1487 error = true;
1488 (*_bfd_error_handler)
1489 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
1490 bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
1491 }
1492
1493 if (error)
1494 {
1495 bfd_set_error (bfd_error_bad_value);
1496 return false;
1497 }
1498 }
1499
1500 return true;
1501 }
1502 \f
1503 /* Handle a PowerPC specific section when reading an object file. This
1504 is called when elfcode.h finds a section with an unknown type. */
1505
1506 static boolean
1507 ppc_elf_section_from_shdr (abfd, hdr, name)
1508 bfd *abfd;
1509 Elf32_Internal_Shdr *hdr;
1510 char *name;
1511 {
1512 asection *newsect;
1513 flagword flags;
1514
1515 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1516 return false;
1517
1518 newsect = hdr->bfd_section;
1519 flags = bfd_get_section_flags (abfd, newsect);
1520 if (hdr->sh_flags & SHF_EXCLUDE)
1521 flags |= SEC_EXCLUDE;
1522
1523 if (hdr->sh_type == SHT_ORDERED)
1524 flags |= SEC_SORT_ENTRIES;
1525
1526 bfd_set_section_flags (abfd, newsect, flags);
1527 return true;
1528 }
1529 \f
1530 /* Set up any other section flags and such that may be necessary. */
1531
1532 static boolean
1533 ppc_elf_fake_sections (abfd, shdr, asect)
1534 bfd *abfd ATTRIBUTE_UNUSED;
1535 Elf32_Internal_Shdr *shdr;
1536 asection *asect;
1537 {
1538 if ((asect->flags & SEC_EXCLUDE) != 0)
1539 shdr->sh_flags |= SHF_EXCLUDE;
1540
1541 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1542 shdr->sh_type = SHT_ORDERED;
1543
1544 return true;
1545 }
1546 \f
1547 /* Create a special linker section */
1548 static elf_linker_section_t *
1549 ppc_elf_create_linker_section (abfd, info, which)
1550 bfd *abfd;
1551 struct bfd_link_info *info;
1552 enum elf_linker_section_enum which;
1553 {
1554 bfd *dynobj = elf_hash_table (info)->dynobj;
1555 elf_linker_section_t *lsect;
1556
1557 /* Record the first bfd section that needs the special section */
1558 if (!dynobj)
1559 dynobj = elf_hash_table (info)->dynobj = abfd;
1560
1561 /* If this is the first time, create the section */
1562 lsect = elf_linker_section (dynobj, which);
1563 if (!lsect)
1564 {
1565 elf_linker_section_t defaults;
1566 static elf_linker_section_t zero_section;
1567
1568 defaults = zero_section;
1569 defaults.which = which;
1570 defaults.hole_written_p = false;
1571 defaults.alignment = 2;
1572
1573 /* Both of these sections are (technically) created by the user
1574 putting data in them, so they shouldn't be marked
1575 SEC_LINKER_CREATED.
1576
1577 The linker creates them so it has somewhere to attach their
1578 respective symbols. In fact, if they were empty it would
1579 be OK to leave the symbol set to 0 (or any random number), because
1580 the appropriate register should never be used. */
1581 defaults.flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1582 | SEC_IN_MEMORY);
1583
1584 switch (which)
1585 {
1586 default:
1587 (*_bfd_error_handler) (_("%s: Unknown special linker type %d"),
1588 bfd_get_filename (abfd),
1589 (int) which);
1590
1591 bfd_set_error (bfd_error_bad_value);
1592 return (elf_linker_section_t *) 0;
1593
1594 case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
1595 defaults.name = ".sdata";
1596 defaults.rel_name = ".rela.sdata";
1597 defaults.bss_name = ".sbss";
1598 defaults.sym_name = "_SDA_BASE_";
1599 defaults.sym_offset = 32768;
1600 break;
1601
1602 case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
1603 defaults.name = ".sdata2";
1604 defaults.rel_name = ".rela.sdata2";
1605 defaults.bss_name = ".sbss2";
1606 defaults.sym_name = "_SDA2_BASE_";
1607 defaults.sym_offset = 32768;
1608 defaults.flags |= SEC_READONLY;
1609 break;
1610 }
1611
1612 lsect = _bfd_elf_create_linker_section (abfd, info, which, &defaults);
1613 }
1614
1615 return lsect;
1616 }
1617 \f
1618 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
1619 need to bump up the number of section headers. */
1620
1621 static int
1622 ppc_elf_additional_program_headers (abfd)
1623 bfd *abfd;
1624 {
1625 asection *s;
1626 int ret;
1627
1628 ret = 0;
1629
1630 s = bfd_get_section_by_name (abfd, ".interp");
1631 if (s != NULL)
1632 ++ret;
1633
1634 s = bfd_get_section_by_name (abfd, ".sbss2");
1635 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
1636 ++ret;
1637
1638 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1639 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
1640 ++ret;
1641
1642 return ret;
1643 }
1644
1645 /* Modify the segment map if needed. */
1646
1647 static boolean
1648 ppc_elf_modify_segment_map (abfd)
1649 bfd *abfd ATTRIBUTE_UNUSED;
1650 {
1651 return true;
1652 }
1653 \f
1654 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
1655 to output sections (just like _bfd_elf_create_dynamic_sections has
1656 to create .dynbss and .rela.bss). */
1657
1658 static boolean
1659 ppc_elf_create_dynamic_sections (abfd, info)
1660 bfd *abfd;
1661 struct bfd_link_info *info;
1662 {
1663 register asection *s;
1664 flagword flags;
1665
1666 if (!_bfd_elf_create_dynamic_sections (abfd, info))
1667 return false;
1668
1669 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1670 | SEC_LINKER_CREATED);
1671
1672 s = bfd_make_section (abfd, ".dynsbss");
1673 if (s == NULL
1674 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
1675 return false;
1676
1677 if (! info->shared)
1678 {
1679 s = bfd_make_section (abfd, ".rela.sbss");
1680 if (s == NULL
1681 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
1682 || ! bfd_set_section_alignment (abfd, s, 2))
1683 return false;
1684 }
1685 return true;
1686 }
1687
1688 /* Adjust a symbol defined by a dynamic object and referenced by a
1689 regular object. The current definition is in some section of the
1690 dynamic object, but we're not including those sections. We have to
1691 change the definition to something the rest of the link can
1692 understand. */
1693
1694 static boolean
1695 ppc_elf_adjust_dynamic_symbol (info, h)
1696 struct bfd_link_info *info;
1697 struct elf_link_hash_entry *h;
1698 {
1699 bfd *dynobj = elf_hash_table (info)->dynobj;
1700 asection *s;
1701 unsigned int power_of_two;
1702 bfd_vma plt_offset;
1703
1704 #ifdef DEBUG
1705 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", h->root.root.string);
1706 #endif
1707
1708 /* Make sure we know what is going on here. */
1709 BFD_ASSERT (dynobj != NULL
1710 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
1711 || h->weakdef != NULL
1712 || ((h->elf_link_hash_flags
1713 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1714 && (h->elf_link_hash_flags
1715 & ELF_LINK_HASH_REF_REGULAR) != 0
1716 && (h->elf_link_hash_flags
1717 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
1718
1719 /* If this is a function, put it in the procedure linkage table. We
1720 will fill in the contents of the procedure linkage table later,
1721 when we know the address of the .got section. */
1722 if (h->type == STT_FUNC
1723 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1724 {
1725 if (! elf_hash_table (info)->dynamic_sections_created
1726 || SYMBOL_CALLS_LOCAL (info, h)
1727 || (info->shared && h->plt.refcount <= 0))
1728 {
1729 /* A PLT entry is not required/allowed when:
1730
1731 1. We are not using ld.so; because then the PLT entry
1732 can't be set up, so we can't use one.
1733
1734 2. We know for certain that a call to this symbol
1735 will go to this object.
1736
1737 3. GC has rendered the entry unused.
1738 Note, however, that in an executable all references to the
1739 symbol go to the PLT, so we can't turn it off in that case.
1740 ??? The correct thing to do here is to reference count
1741 all uses of the symbol, not just those to the GOT or PLT. */
1742 h->plt.offset = (bfd_vma) -1;
1743 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1744 return true;
1745 }
1746
1747 /* Make sure this symbol is output as a dynamic symbol. */
1748 if (h->dynindx == -1)
1749 {
1750 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1751 return false;
1752 }
1753 BFD_ASSERT (h->dynindx != -1);
1754
1755 s = bfd_get_section_by_name (dynobj, ".plt");
1756 BFD_ASSERT (s != NULL);
1757
1758 /* If this is the first .plt entry, make room for the special
1759 first entry. */
1760 if (s->_raw_size == 0)
1761 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
1762
1763 /* The PowerPC PLT is actually composed of two parts, the first part
1764 is 2 words (for a load and a jump), and then there is a remaining
1765 word available at the end. */
1766 plt_offset = (PLT_INITIAL_ENTRY_SIZE
1767 + (PLT_SLOT_SIZE
1768 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE)
1769 / PLT_ENTRY_SIZE)));
1770
1771 /* If this symbol is not defined in a regular file, and we are
1772 not generating a shared library, then set the symbol to this
1773 location in the .plt. This is required to make function
1774 pointers compare as equal between the normal executable and
1775 the shared library. */
1776 if (! info->shared
1777 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1778 {
1779 h->root.u.def.section = s;
1780 h->root.u.def.value = plt_offset;
1781 }
1782
1783 h->plt.offset = plt_offset;
1784
1785 /* Make room for this entry. After the 8192nd entry, room
1786 for two entries is allocated. */
1787 if ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
1788 >= PLT_NUM_SINGLE_ENTRIES)
1789 s->_raw_size += 2 * PLT_ENTRY_SIZE;
1790 else
1791 s->_raw_size += PLT_ENTRY_SIZE;
1792
1793 /* We also need to make an entry in the .rela.plt section. */
1794 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1795 BFD_ASSERT (s != NULL);
1796 s->_raw_size += sizeof (Elf32_External_Rela);
1797
1798 return true;
1799 }
1800
1801 /* If this is a weak symbol, and there is a real definition, the
1802 processor independent code will have arranged for us to see the
1803 real definition first, and we can just use the same value. */
1804 if (h->weakdef != NULL)
1805 {
1806 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1807 || h->weakdef->root.type == bfd_link_hash_defweak);
1808 h->root.u.def.section = h->weakdef->root.u.def.section;
1809 h->root.u.def.value = h->weakdef->root.u.def.value;
1810 return true;
1811 }
1812
1813 /* This is a reference to a symbol defined by a dynamic object which
1814 is not a function. */
1815
1816 /* If we are creating a shared library, we must presume that the
1817 only references to the symbol are via the global offset table.
1818 For such cases we need not do anything here; the relocations will
1819 be handled correctly by relocate_section. */
1820 if (info->shared)
1821 return true;
1822
1823 /* We must allocate the symbol in our .dynbss section, which will
1824 become part of the .bss section of the executable. There will be
1825 an entry for this symbol in the .dynsym section. The dynamic
1826 object will contain position independent code, so all references
1827 from the dynamic object to this symbol will go through the global
1828 offset table. The dynamic linker will use the .dynsym entry to
1829 determine the address it must put in the global offset table, so
1830 both the dynamic object and the regular object will refer to the
1831 same memory location for the variable.
1832
1833 Of course, if the symbol is sufficiently small, we must instead
1834 allocate it in .sbss. FIXME: It would be better to do this if and
1835 only if there were actually SDAREL relocs for that symbol. */
1836
1837 if (h->size <= elf_gp_size (dynobj))
1838 s = bfd_get_section_by_name (dynobj, ".dynsbss");
1839 else
1840 s = bfd_get_section_by_name (dynobj, ".dynbss");
1841 BFD_ASSERT (s != NULL);
1842
1843 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
1844 copy the initial value out of the dynamic object and into the
1845 runtime process image. We need to remember the offset into the
1846 .rela.bss section we are going to use. */
1847 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1848 {
1849 asection *srel;
1850
1851 if (h->size <= elf_gp_size (dynobj))
1852 srel = bfd_get_section_by_name (dynobj, ".rela.sbss");
1853 else
1854 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1855 BFD_ASSERT (srel != NULL);
1856 srel->_raw_size += sizeof (Elf32_External_Rela);
1857 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1858 }
1859
1860 /* We need to figure out the alignment required for this symbol. I
1861 have no idea how ELF linkers handle this. */
1862 power_of_two = bfd_log2 (h->size);
1863 if (power_of_two > 4)
1864 power_of_two = 4;
1865
1866 /* Apply the required alignment. */
1867 s->_raw_size = BFD_ALIGN (s->_raw_size,
1868 (bfd_size_type) (1 << power_of_two));
1869 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1870 {
1871 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
1872 return false;
1873 }
1874
1875 /* Define the symbol as being at this point in the section. */
1876 h->root.u.def.section = s;
1877 h->root.u.def.value = s->_raw_size;
1878
1879 /* Increment the section size to make room for the symbol. */
1880 s->_raw_size += h->size;
1881
1882 return true;
1883 }
1884 \f
1885 /* Set the sizes of the dynamic sections. */
1886
1887 static boolean
1888 ppc_elf_size_dynamic_sections (output_bfd, info)
1889 bfd *output_bfd ATTRIBUTE_UNUSED;
1890 struct bfd_link_info *info;
1891 {
1892 bfd *dynobj;
1893 asection *s;
1894 boolean plt;
1895 boolean relocs;
1896
1897 #ifdef DEBUG
1898 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
1899 #endif
1900
1901 dynobj = elf_hash_table (info)->dynobj;
1902 BFD_ASSERT (dynobj != NULL);
1903
1904 if (elf_hash_table (info)->dynamic_sections_created)
1905 {
1906 /* Set the contents of the .interp section to the interpreter. */
1907 if (! info->shared)
1908 {
1909 s = bfd_get_section_by_name (dynobj, ".interp");
1910 BFD_ASSERT (s != NULL);
1911 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1912 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1913 }
1914 }
1915 else
1916 {
1917 /* We may have created entries in the .rela.got, .rela.sdata, and
1918 .rela.sdata2 sections. However, if we are not creating the
1919 dynamic sections, we will not actually use these entries. Reset
1920 the size of .rela.got, et al, which will cause it to get
1921 stripped from the output file below. */
1922 static char *rela_sections[] = { ".rela.got", ".rela.sdata",
1923 ".rela.sdata2", ".rela.sbss",
1924 (char *) 0 };
1925 char **p;
1926
1927 for (p = rela_sections; *p != (char *) 0; p++)
1928 {
1929 s = bfd_get_section_by_name (dynobj, *p);
1930 if (s != NULL)
1931 s->_raw_size = 0;
1932 }
1933 }
1934
1935 /* The check_relocs and adjust_dynamic_symbol entry points have
1936 determined the sizes of the various dynamic sections. Allocate
1937 memory for them. */
1938 plt = false;
1939 relocs = false;
1940 for (s = dynobj->sections; s != NULL; s = s->next)
1941 {
1942 const char *name;
1943 boolean strip;
1944
1945 if ((s->flags & SEC_LINKER_CREATED) == 0)
1946 continue;
1947
1948 /* It's OK to base decisions on the section name, because none
1949 of the dynobj section names depend upon the input files. */
1950 name = bfd_get_section_name (dynobj, s);
1951
1952 strip = false;
1953
1954 if (strcmp (name, ".plt") == 0)
1955 {
1956 if (s->_raw_size == 0)
1957 {
1958 /* Strip this section if we don't need it; see the
1959 comment below. */
1960 strip = true;
1961 }
1962 else
1963 {
1964 /* Remember whether there is a PLT. */
1965 plt = true;
1966 }
1967 }
1968 else if (strncmp (name, ".rela", 5) == 0)
1969 {
1970 if (s->_raw_size == 0)
1971 {
1972 /* If we don't need this section, strip it from the
1973 output file. This is mostly to handle .rela.bss and
1974 .rela.plt. We must create both sections in
1975 create_dynamic_sections, because they must be created
1976 before the linker maps input sections to output
1977 sections. The linker does that before
1978 adjust_dynamic_symbol is called, and it is that
1979 function which decides whether anything needs to go
1980 into these sections. */
1981 strip = true;
1982 }
1983 else
1984 {
1985 /* Remember whether there are any relocation sections. */
1986 relocs = true;
1987
1988 /* We use the reloc_count field as a counter if we need
1989 to copy relocs into the output file. */
1990 s->reloc_count = 0;
1991 }
1992 }
1993 else if (strcmp (name, ".got") != 0
1994 && strcmp (name, ".sdata") != 0
1995 && strcmp (name, ".sdata2") != 0)
1996 {
1997 /* It's not one of our sections, so don't allocate space. */
1998 continue;
1999 }
2000
2001 if (strip)
2002 {
2003 _bfd_strip_section_from_output (info, s);
2004 continue;
2005 }
2006
2007 /* Allocate memory for the section contents. */
2008 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
2009 if (s->contents == NULL && s->_raw_size != 0)
2010 return false;
2011 }
2012
2013 if (elf_hash_table (info)->dynamic_sections_created)
2014 {
2015 /* Add some entries to the .dynamic section. We fill in the
2016 values later, in ppc_elf_finish_dynamic_sections, but we
2017 must add the entries now so that we get the correct size for
2018 the .dynamic section. The DT_DEBUG entry is filled in by the
2019 dynamic linker and used by the debugger. */
2020 #define add_dynamic_entry(TAG, VAL) \
2021 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
2022
2023 if (!info->shared)
2024 {
2025 if (!add_dynamic_entry (DT_DEBUG, 0))
2026 return false;
2027 }
2028
2029 if (plt)
2030 {
2031 if (!add_dynamic_entry (DT_PLTGOT, 0)
2032 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2033 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2034 || !add_dynamic_entry (DT_JMPREL, 0))
2035 return false;
2036 }
2037
2038 if (relocs)
2039 {
2040 if (!add_dynamic_entry (DT_RELA, 0)
2041 || !add_dynamic_entry (DT_RELASZ, 0)
2042 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2043 return false;
2044 }
2045
2046 if ((info->flags & DF_TEXTREL) != 0)
2047 {
2048 if (!add_dynamic_entry (DT_TEXTREL, 0))
2049 return false;
2050 info->flags |= DF_TEXTREL;
2051 }
2052 }
2053 #undef add_dynamic_entry
2054
2055 return true;
2056 }
2057 \f
2058 /* Look through the relocs for a section during the first phase, and
2059 allocate space in the global offset table or procedure linkage
2060 table. */
2061
2062 static boolean
2063 ppc_elf_check_relocs (abfd, info, sec, relocs)
2064 bfd *abfd;
2065 struct bfd_link_info *info;
2066 asection *sec;
2067 const Elf_Internal_Rela *relocs;
2068 {
2069 bfd *dynobj;
2070 Elf_Internal_Shdr *symtab_hdr;
2071 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
2072 const Elf_Internal_Rela *rel;
2073 const Elf_Internal_Rela *rel_end;
2074 bfd_signed_vma *local_got_refcounts;
2075 elf_linker_section_t *sdata;
2076 elf_linker_section_t *sdata2;
2077 asection *sreloc;
2078 asection *sgot = NULL;
2079 asection *srelgot = NULL;
2080
2081 if (info->relocateable)
2082 return true;
2083
2084 #ifdef DEBUG
2085 fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n",
2086 bfd_get_section_name (abfd, sec),
2087 bfd_archive_filename (abfd));
2088 #endif
2089
2090 /* Create the linker generated sections all the time so that the
2091 special symbols are created. */
2092
2093 if ((sdata = elf_linker_section (abfd, LINKER_SECTION_SDATA)) == NULL)
2094 {
2095 sdata = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA);
2096 if (!sdata)
2097 return false;
2098 }
2099
2100 if ((sdata2 = elf_linker_section (abfd, LINKER_SECTION_SDATA2)) == NULL)
2101 {
2102 sdata2 = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA2);
2103 if (!sdata2)
2104 return false;
2105 }
2106
2107 dynobj = elf_hash_table (info)->dynobj;
2108 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2109 local_got_refcounts = elf_local_got_refcounts (abfd);
2110
2111 sym_hashes = elf_sym_hashes (abfd);
2112 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
2113 if (!elf_bad_symtab (abfd))
2114 sym_hashes_end -= symtab_hdr->sh_info;
2115
2116 sreloc = NULL;
2117
2118 rel_end = relocs + sec->reloc_count;
2119 for (rel = relocs; rel < rel_end; rel++)
2120 {
2121 unsigned long r_symndx;
2122 struct elf_link_hash_entry *h;
2123
2124 r_symndx = ELF32_R_SYM (rel->r_info);
2125 if (r_symndx < symtab_hdr->sh_info)
2126 h = NULL;
2127 else
2128 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2129
2130 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
2131 This shows up in particular in an R_PPC_ADDR32 in the eabi
2132 startup code. */
2133 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2134 {
2135 if (sgot == NULL)
2136 {
2137 if (dynobj == NULL)
2138 elf_hash_table (info)->dynobj = dynobj = abfd;
2139 if (! _bfd_elf_create_got_section (dynobj, info))
2140 return false;
2141 sgot = bfd_get_section_by_name (dynobj, ".got");
2142 BFD_ASSERT (sgot != NULL);
2143 }
2144 }
2145
2146 switch (ELF32_R_TYPE (rel->r_info))
2147 {
2148 /* GOT16 relocations */
2149 case R_PPC_GOT16:
2150 case R_PPC_GOT16_LO:
2151 case R_PPC_GOT16_HI:
2152 case R_PPC_GOT16_HA:
2153 /* This symbol requires a global offset table entry. */
2154
2155 if (sgot == NULL)
2156 {
2157 if (dynobj == NULL)
2158 elf_hash_table (info)->dynobj = dynobj = abfd;
2159 if (! _bfd_elf_create_got_section (dynobj, info))
2160 return false;
2161 sgot = bfd_get_section_by_name (dynobj, ".got");
2162 BFD_ASSERT (sgot != NULL);
2163 }
2164
2165 if (srelgot == NULL
2166 && (h != NULL || info->shared))
2167 {
2168 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2169 if (srelgot == NULL)
2170 {
2171 srelgot = bfd_make_section (dynobj, ".rela.got");
2172 if (srelgot == NULL
2173 || ! bfd_set_section_flags (dynobj, srelgot,
2174 (SEC_ALLOC
2175 | SEC_LOAD
2176 | SEC_HAS_CONTENTS
2177 | SEC_IN_MEMORY
2178 | SEC_LINKER_CREATED
2179 | SEC_READONLY))
2180 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
2181 return false;
2182 }
2183 }
2184
2185 if (h != NULL)
2186 {
2187 if (h->got.refcount == 0)
2188 {
2189 /* Make sure this symbol is output as a dynamic symbol. */
2190 if (h->dynindx == -1)
2191 if (!bfd_elf32_link_record_dynamic_symbol (info, h))
2192 return false;
2193
2194 /* Allocate space in the .got. */
2195 sgot->_raw_size += 4;
2196 /* Allocate relocation space. */
2197 srelgot->_raw_size += sizeof (Elf32_External_Rela);
2198 }
2199 h->got.refcount++;
2200 }
2201 else
2202 {
2203 /* This is a global offset table entry for a local symbol. */
2204 if (local_got_refcounts == NULL)
2205 {
2206 bfd_size_type size;
2207
2208 size = symtab_hdr->sh_info;
2209 size *= sizeof (bfd_signed_vma);
2210 local_got_refcounts
2211 = (bfd_signed_vma *) bfd_zalloc (abfd, size);
2212 if (local_got_refcounts == NULL)
2213 return false;
2214 elf_local_got_refcounts (abfd) = local_got_refcounts;
2215 }
2216 if (local_got_refcounts[r_symndx] == 0)
2217 {
2218 sgot->_raw_size += 4;
2219
2220 /* If we are generating a shared object, we need to
2221 output a R_PPC_RELATIVE reloc so that the
2222 dynamic linker can adjust this GOT entry. */
2223 if (info->shared)
2224 srelgot->_raw_size += sizeof (Elf32_External_Rela);
2225 }
2226 local_got_refcounts[r_symndx]++;
2227 }
2228 break;
2229
2230 /* Indirect .sdata relocation */
2231 case R_PPC_EMB_SDAI16:
2232 if (info->shared)
2233 {
2234 ((*_bfd_error_handler)
2235 (_("%s: relocation %s cannot be used when making a shared object"),
2236 bfd_archive_filename (abfd), "R_PPC_EMB_SDAI16"));
2237 return false;
2238 }
2239
2240 if (srelgot == NULL && (h != NULL || info->shared))
2241 {
2242 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2243 if (srelgot == NULL)
2244 {
2245 srelgot = bfd_make_section (dynobj, ".rela.got");
2246 if (srelgot == NULL
2247 || ! bfd_set_section_flags (dynobj, srelgot,
2248 (SEC_ALLOC
2249 | SEC_LOAD
2250 | SEC_HAS_CONTENTS
2251 | SEC_IN_MEMORY
2252 | SEC_LINKER_CREATED
2253 | SEC_READONLY))
2254 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
2255 return false;
2256 }
2257 }
2258
2259 if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata, h, rel))
2260 return false;
2261
2262 break;
2263
2264 /* Indirect .sdata2 relocation */
2265 case R_PPC_EMB_SDA2I16:
2266 if (info->shared)
2267 {
2268 ((*_bfd_error_handler)
2269 (_("%s: relocation %s cannot be used when making a shared object"),
2270 bfd_archive_filename (abfd), "R_PPC_EMB_SDA2I16"));
2271 return false;
2272 }
2273
2274 if (srelgot == NULL && (h != NULL || info->shared))
2275 {
2276 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2277 if (srelgot == NULL)
2278 {
2279 srelgot = bfd_make_section (dynobj, ".rela.got");
2280 if (srelgot == NULL
2281 || ! bfd_set_section_flags (dynobj, srelgot,
2282 (SEC_ALLOC
2283 | SEC_LOAD
2284 | SEC_HAS_CONTENTS
2285 | SEC_IN_MEMORY
2286 | SEC_LINKER_CREATED
2287 | SEC_READONLY))
2288 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
2289 return false;
2290 }
2291 }
2292
2293 if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata2, h, rel))
2294 return false;
2295
2296 break;
2297
2298 case R_PPC_SDAREL16:
2299 case R_PPC_EMB_SDA2REL:
2300 case R_PPC_EMB_SDA21:
2301 if (info->shared)
2302 {
2303 ((*_bfd_error_handler)
2304 (_("%s: relocation %s cannot be used when making a shared object"),
2305 bfd_archive_filename (abfd),
2306 ppc_elf_howto_table[(int) ELF32_R_TYPE (rel->r_info)]->name));
2307 return false;
2308 }
2309 break;
2310
2311 case R_PPC_PLT32:
2312 case R_PPC_PLTREL24:
2313 case R_PPC_PLT16_LO:
2314 case R_PPC_PLT16_HI:
2315 case R_PPC_PLT16_HA:
2316 #ifdef DEBUG
2317 fprintf (stderr, "Reloc requires a PLT entry\n");
2318 #endif
2319 /* This symbol requires a procedure linkage table entry. We
2320 actually build the entry in adjust_dynamic_symbol,
2321 because this might be a case of linking PIC code without
2322 linking in any dynamic objects, in which case we don't
2323 need to generate a procedure linkage table after all. */
2324
2325 if (h == NULL)
2326 {
2327 /* It does not make sense to have a procedure linkage
2328 table entry for a local symbol. */
2329 bfd_set_error (bfd_error_bad_value);
2330 return false;
2331 }
2332
2333 /* Make sure this symbol is output as a dynamic symbol. */
2334 if (h->dynindx == -1)
2335 {
2336 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2337 return false;
2338 }
2339 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2340 h->plt.refcount++;
2341 break;
2342
2343 /* The following relocations don't need to propagate the
2344 relocation if linking a shared object since they are
2345 section relative. */
2346 case R_PPC_SECTOFF:
2347 case R_PPC_SECTOFF_LO:
2348 case R_PPC_SECTOFF_HI:
2349 case R_PPC_SECTOFF_HA:
2350 break;
2351
2352 /* This refers only to functions defined in the shared library */
2353 case R_PPC_LOCAL24PC:
2354 break;
2355
2356 /* This relocation describes the C++ object vtable hierarchy.
2357 Reconstruct it for later use during GC. */
2358 case R_PPC_GNU_VTINHERIT:
2359 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2360 return false;
2361 break;
2362
2363 /* This relocation describes which C++ vtable entries are actually
2364 used. Record for later use during GC. */
2365 case R_PPC_GNU_VTENTRY:
2366 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2367 return false;
2368 break;
2369
2370 /* When creating a shared object, we must copy these
2371 relocs into the output file. We create a reloc
2372 section in dynobj and make room for the reloc. */
2373 case R_PPC_REL24:
2374 case R_PPC_REL14:
2375 case R_PPC_REL14_BRTAKEN:
2376 case R_PPC_REL14_BRNTAKEN:
2377 case R_PPC_REL32:
2378 if (h == NULL
2379 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
2380 || SYMBOL_REFERENCES_LOCAL (info, h))
2381 break;
2382 /* fall through */
2383
2384 default:
2385 if (info->shared)
2386 {
2387 #ifdef DEBUG
2388 fprintf (stderr, "ppc_elf_check_relocs need to create relocation for %s\n",
2389 (h && h->root.root.string) ? h->root.root.string : "<unknown>");
2390 #endif
2391 if (sreloc == NULL)
2392 {
2393 const char *name;
2394
2395 name = (bfd_elf_string_from_elf_section
2396 (abfd,
2397 elf_elfheader (abfd)->e_shstrndx,
2398 elf_section_data (sec)->rel_hdr.sh_name));
2399 if (name == NULL)
2400 return false;
2401
2402 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
2403 && strcmp (bfd_get_section_name (abfd, sec),
2404 name + 5) == 0);
2405
2406 sreloc = bfd_get_section_by_name (dynobj, name);
2407 if (sreloc == NULL)
2408 {
2409 flagword flags;
2410
2411 sreloc = bfd_make_section (dynobj, name);
2412 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2413 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2414 if ((sec->flags & SEC_ALLOC) != 0)
2415 flags |= SEC_ALLOC | SEC_LOAD;
2416 if (sreloc == NULL
2417 || ! bfd_set_section_flags (dynobj, sreloc, flags)
2418 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
2419 return false;
2420 }
2421 if (sec->flags & SEC_READONLY)
2422 info->flags |= DF_TEXTREL;
2423 }
2424
2425 sreloc->_raw_size += sizeof (Elf32_External_Rela);
2426
2427 /* FIXME: We should here do what the m68k and i386
2428 backends do: if the reloc is pc-relative, record it
2429 in case it turns out that the reloc is unnecessary
2430 because the symbol is forced local by versioning or
2431 we are linking with -Bdynamic. Fortunately this
2432 case is not frequent. */
2433 }
2434
2435 break;
2436 }
2437 }
2438
2439 return true;
2440 }
2441
2442 /* Return the section that should be marked against GC for a given
2443 relocation. */
2444
2445 static asection *
2446 ppc_elf_gc_mark_hook (abfd, info, rel, h, sym)
2447 bfd *abfd;
2448 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2449 Elf_Internal_Rela *rel;
2450 struct elf_link_hash_entry *h;
2451 Elf_Internal_Sym *sym;
2452 {
2453 if (h != NULL)
2454 {
2455 switch (ELF32_R_TYPE (rel->r_info))
2456 {
2457 case R_PPC_GNU_VTINHERIT:
2458 case R_PPC_GNU_VTENTRY:
2459 break;
2460
2461 default:
2462 switch (h->root.type)
2463 {
2464 case bfd_link_hash_defined:
2465 case bfd_link_hash_defweak:
2466 return h->root.u.def.section;
2467
2468 case bfd_link_hash_common:
2469 return h->root.u.c.p->section;
2470
2471 default:
2472 break;
2473 }
2474 }
2475 }
2476 else
2477 {
2478 if (!(elf_bad_symtab (abfd)
2479 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
2480 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
2481 && sym->st_shndx != SHN_COMMON))
2482 {
2483 return bfd_section_from_elf_index (abfd, sym->st_shndx);
2484 }
2485 }
2486
2487 return NULL;
2488 }
2489
2490 /* Update the got entry reference counts for the section being removed. */
2491
2492 static boolean
2493 ppc_elf_gc_sweep_hook (abfd, info, sec, relocs)
2494 bfd *abfd;
2495 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2496 asection *sec;
2497 const Elf_Internal_Rela *relocs;
2498 {
2499 Elf_Internal_Shdr *symtab_hdr;
2500 struct elf_link_hash_entry **sym_hashes;
2501 bfd_signed_vma *local_got_refcounts;
2502 const Elf_Internal_Rela *rel, *relend;
2503 unsigned long r_symndx;
2504 struct elf_link_hash_entry *h;
2505
2506 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2507 sym_hashes = elf_sym_hashes (abfd);
2508 local_got_refcounts = elf_local_got_refcounts (abfd);
2509
2510 relend = relocs + sec->reloc_count;
2511 for (rel = relocs; rel < relend; rel++)
2512 switch (ELF32_R_TYPE (rel->r_info))
2513 {
2514 case R_PPC_GOT16:
2515 case R_PPC_GOT16_LO:
2516 case R_PPC_GOT16_HI:
2517 case R_PPC_GOT16_HA:
2518 r_symndx = ELF32_R_SYM (rel->r_info);
2519 if (r_symndx >= symtab_hdr->sh_info)
2520 {
2521 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2522 if (h->got.refcount > 0)
2523 h->got.refcount--;
2524 }
2525 else if (local_got_refcounts != NULL)
2526 {
2527 if (local_got_refcounts[r_symndx] > 0)
2528 local_got_refcounts[r_symndx]--;
2529 }
2530 break;
2531
2532 case R_PPC_PLT32:
2533 case R_PPC_PLTREL24:
2534 case R_PPC_PLT16_LO:
2535 case R_PPC_PLT16_HI:
2536 case R_PPC_PLT16_HA:
2537 r_symndx = ELF32_R_SYM (rel->r_info);
2538 if (r_symndx >= symtab_hdr->sh_info)
2539 {
2540 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2541 if (h->plt.refcount > 0)
2542 h->plt.refcount--;
2543 }
2544 break;
2545
2546 default:
2547 break;
2548 }
2549
2550 return true;
2551 }
2552 \f
2553 /* Hook called by the linker routine which adds symbols from an object
2554 file. We use it to put .comm items in .sbss, and not .bss. */
2555
2556 static boolean
2557 ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
2558 bfd *abfd;
2559 struct bfd_link_info *info;
2560 const Elf_Internal_Sym *sym;
2561 const char **namep ATTRIBUTE_UNUSED;
2562 flagword *flagsp ATTRIBUTE_UNUSED;
2563 asection **secp;
2564 bfd_vma *valp;
2565 {
2566 if (sym->st_shndx == SHN_COMMON
2567 && !info->relocateable
2568 && sym->st_size <= elf_gp_size (abfd))
2569 {
2570 /* Common symbols less than or equal to -G nn bytes are automatically
2571 put into .sdata. */
2572 elf_linker_section_t *sdata
2573 = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA);
2574
2575 if (!sdata->bss_section)
2576 {
2577 bfd_size_type amt;
2578
2579 /* We don't go through bfd_make_section, because we don't
2580 want to attach this common section to DYNOBJ. The linker
2581 will move the symbols to the appropriate output section
2582 when it defines common symbols. */
2583 amt = sizeof (asection);
2584 sdata->bss_section = (asection *) bfd_zalloc (abfd, amt);
2585 if (sdata->bss_section == NULL)
2586 return false;
2587 sdata->bss_section->name = sdata->bss_name;
2588 sdata->bss_section->flags = SEC_IS_COMMON;
2589 sdata->bss_section->output_section = sdata->bss_section;
2590 amt = sizeof (asymbol);
2591 sdata->bss_section->symbol = (asymbol *) bfd_zalloc (abfd, amt);
2592 amt = sizeof (asymbol *);
2593 sdata->bss_section->symbol_ptr_ptr =
2594 (asymbol **) bfd_zalloc (abfd, amt);
2595 if (sdata->bss_section->symbol == NULL
2596 || sdata->bss_section->symbol_ptr_ptr == NULL)
2597 return false;
2598 sdata->bss_section->symbol->name = sdata->bss_name;
2599 sdata->bss_section->symbol->flags = BSF_SECTION_SYM;
2600 sdata->bss_section->symbol->section = sdata->bss_section;
2601 *sdata->bss_section->symbol_ptr_ptr = sdata->bss_section->symbol;
2602 }
2603
2604 *secp = sdata->bss_section;
2605 *valp = sym->st_size;
2606 }
2607
2608 return true;
2609 }
2610 \f
2611 /* Finish up dynamic symbol handling. We set the contents of various
2612 dynamic sections here. */
2613
2614 static boolean
2615 ppc_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
2616 bfd *output_bfd;
2617 struct bfd_link_info *info;
2618 struct elf_link_hash_entry *h;
2619 Elf_Internal_Sym *sym;
2620 {
2621 bfd *dynobj;
2622
2623 #ifdef DEBUG
2624 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
2625 h->root.root.string);
2626 #endif
2627
2628 dynobj = elf_hash_table (info)->dynobj;
2629 BFD_ASSERT (dynobj != NULL);
2630
2631 if (h->plt.offset != (bfd_vma) -1)
2632 {
2633 asection *splt;
2634 asection *srela;
2635 Elf_Internal_Rela rela;
2636 bfd_vma reloc_index;
2637
2638 #ifdef DEBUG
2639 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
2640 #endif
2641
2642 /* This symbol has an entry in the procedure linkage table. Set
2643 it up. */
2644
2645 BFD_ASSERT (h->dynindx != -1);
2646
2647 splt = bfd_get_section_by_name (dynobj, ".plt");
2648 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
2649 BFD_ASSERT (splt != NULL && srela != NULL);
2650
2651 /* We don't need to fill in the .plt. The ppc dynamic linker
2652 will fill it in. */
2653
2654 /* Fill in the entry in the .rela.plt section. */
2655 rela.r_offset = (splt->output_section->vma
2656 + splt->output_offset
2657 + h->plt.offset);
2658 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
2659 rela.r_addend = 0;
2660
2661 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
2662 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
2663 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
2664 bfd_elf32_swap_reloca_out (output_bfd, &rela,
2665 ((Elf32_External_Rela *) srela->contents
2666 + reloc_index));
2667
2668 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2669 {
2670 /* Mark the symbol as undefined, rather than as defined in
2671 the .plt section. Leave the value alone. */
2672 sym->st_shndx = SHN_UNDEF;
2673 /* If the symbol is weak, we do need to clear the value.
2674 Otherwise, the PLT entry would provide a definition for
2675 the symbol even if the symbol wasn't defined anywhere,
2676 and so the symbol would never be NULL. */
2677 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
2678 == 0)
2679 sym->st_value = 0;
2680 }
2681 }
2682
2683 if (h->got.offset != (bfd_vma) -1)
2684 {
2685 asection *sgot;
2686 asection *srela;
2687 Elf_Internal_Rela rela;
2688
2689 /* This symbol has an entry in the global offset table. Set it
2690 up. */
2691
2692 sgot = bfd_get_section_by_name (dynobj, ".got");
2693 srela = bfd_get_section_by_name (dynobj, ".rela.got");
2694 BFD_ASSERT (sgot != NULL && srela != NULL);
2695
2696 rela.r_offset = (sgot->output_section->vma
2697 + sgot->output_offset
2698 + (h->got.offset &~ (bfd_vma) 1));
2699
2700 /* If this is a -Bsymbolic link, and the symbol is defined
2701 locally, we just want to emit a RELATIVE reloc. The entry in
2702 the global offset table will already have been initialized in
2703 the relocate_section function. */
2704 if (info->shared
2705 && SYMBOL_REFERENCES_LOCAL (info, h))
2706 {
2707 rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
2708 rela.r_addend = (h->root.u.def.value
2709 + h->root.u.def.section->output_section->vma
2710 + h->root.u.def.section->output_offset);
2711 }
2712 else
2713 {
2714 BFD_ASSERT ((h->got.offset & 1) == 0);
2715 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
2716 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_GLOB_DAT);
2717 rela.r_addend = 0;
2718 }
2719
2720 bfd_elf32_swap_reloca_out (output_bfd, &rela,
2721 ((Elf32_External_Rela *) srela->contents
2722 + srela->reloc_count));
2723 ++srela->reloc_count;
2724 }
2725
2726 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2727 {
2728 asection *s;
2729 Elf_Internal_Rela rela;
2730
2731 /* This symbols needs a copy reloc. Set it up. */
2732
2733 #ifdef DEBUG
2734 fprintf (stderr, ", copy");
2735 #endif
2736
2737 BFD_ASSERT (h->dynindx != -1);
2738
2739 if (h->size <= elf_gp_size (dynobj))
2740 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2741 ".rela.sbss");
2742 else
2743 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2744 ".rela.bss");
2745 BFD_ASSERT (s != NULL);
2746
2747 rela.r_offset = (h->root.u.def.value
2748 + h->root.u.def.section->output_section->vma
2749 + h->root.u.def.section->output_offset);
2750 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
2751 rela.r_addend = 0;
2752 bfd_elf32_swap_reloca_out (output_bfd, &rela,
2753 ((Elf32_External_Rela *) s->contents
2754 + s->reloc_count));
2755 ++s->reloc_count;
2756 }
2757
2758 #ifdef DEBUG
2759 fprintf (stderr, "\n");
2760 #endif
2761
2762 /* Mark some specially defined symbols as absolute. */
2763 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2764 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
2765 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
2766 sym->st_shndx = SHN_ABS;
2767
2768 return true;
2769 }
2770 \f
2771 /* Finish up the dynamic sections. */
2772
2773 static boolean
2774 ppc_elf_finish_dynamic_sections (output_bfd, info)
2775 bfd *output_bfd;
2776 struct bfd_link_info *info;
2777 {
2778 asection *sdyn;
2779 bfd *dynobj = elf_hash_table (info)->dynobj;
2780 asection *sgot = bfd_get_section_by_name (dynobj, ".got");
2781
2782 #ifdef DEBUG
2783 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
2784 #endif
2785
2786 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2787
2788 if (elf_hash_table (info)->dynamic_sections_created)
2789 {
2790 asection *splt;
2791 Elf32_External_Dyn *dyncon, *dynconend;
2792
2793 splt = bfd_get_section_by_name (dynobj, ".plt");
2794 BFD_ASSERT (splt != NULL && sdyn != NULL);
2795
2796 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2797 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2798 for (; dyncon < dynconend; dyncon++)
2799 {
2800 Elf_Internal_Dyn dyn;
2801 const char *name;
2802 boolean size;
2803
2804 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2805
2806 switch (dyn.d_tag)
2807 {
2808 case DT_PLTGOT: name = ".plt"; size = false; break;
2809 case DT_PLTRELSZ: name = ".rela.plt"; size = true; break;
2810 case DT_JMPREL: name = ".rela.plt"; size = false; break;
2811 default: name = NULL; size = false; break;
2812 }
2813
2814 if (name != NULL)
2815 {
2816 asection *s;
2817
2818 s = bfd_get_section_by_name (output_bfd, name);
2819 if (s == NULL)
2820 dyn.d_un.d_val = 0;
2821 else
2822 {
2823 if (! size)
2824 dyn.d_un.d_ptr = s->vma;
2825 else
2826 {
2827 if (s->_cooked_size != 0)
2828 dyn.d_un.d_val = s->_cooked_size;
2829 else
2830 dyn.d_un.d_val = s->_raw_size;
2831 }
2832 }
2833 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2834 }
2835 }
2836 }
2837
2838 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
2839 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
2840 if (sgot)
2841 {
2842 unsigned char *contents = sgot->contents;
2843 bfd_put_32 (output_bfd, (bfd_vma) 0x4e800021 /* blrl */, contents);
2844
2845 if (sdyn == NULL)
2846 bfd_put_32 (output_bfd, (bfd_vma) 0, contents+4);
2847 else
2848 bfd_put_32 (output_bfd,
2849 sdyn->output_section->vma + sdyn->output_offset,
2850 contents+4);
2851
2852 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2853 }
2854
2855 return true;
2856 }
2857 \f
2858 /* The RELOCATE_SECTION function is called by the ELF backend linker
2859 to handle the relocations for a section.
2860
2861 The relocs are always passed as Rela structures; if the section
2862 actually uses Rel structures, the r_addend field will always be
2863 zero.
2864
2865 This function is responsible for adjust the section contents as
2866 necessary, and (if using Rela relocs and generating a
2867 relocateable output file) adjusting the reloc addend as
2868 necessary.
2869
2870 This function does not have to worry about setting the reloc
2871 address or the reloc symbol index.
2872
2873 LOCAL_SYMS is a pointer to the swapped in local symbols.
2874
2875 LOCAL_SECTIONS is an array giving the section in the input file
2876 corresponding to the st_shndx field of each local symbol.
2877
2878 The global hash table entry for the global symbols can be found
2879 via elf_sym_hashes (input_bfd).
2880
2881 When generating relocateable output, this function must handle
2882 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2883 going to be the section symbol corresponding to the output
2884 section, which means that the addend must be adjusted
2885 accordingly. */
2886
2887 static boolean
2888 ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section,
2889 contents, relocs, local_syms, local_sections)
2890 bfd *output_bfd;
2891 struct bfd_link_info *info;
2892 bfd *input_bfd;
2893 asection *input_section;
2894 bfd_byte *contents;
2895 Elf_Internal_Rela *relocs;
2896 Elf_Internal_Sym *local_syms;
2897 asection **local_sections;
2898 {
2899 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2900 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
2901 bfd *dynobj = elf_hash_table (info)->dynobj;
2902 elf_linker_section_t *sdata = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA) : NULL;
2903 elf_linker_section_t *sdata2 = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA2) : NULL;
2904 Elf_Internal_Rela *rel = relocs;
2905 Elf_Internal_Rela *relend = relocs + input_section->reloc_count;
2906 asection *sreloc = NULL;
2907 asection *splt;
2908 asection *sgot;
2909 bfd_vma *local_got_offsets;
2910 boolean ret = true;
2911 long insn;
2912
2913 #ifdef DEBUG
2914 fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n",
2915 bfd_archive_filename (input_bfd),
2916 bfd_section_name(input_bfd, input_section),
2917 (long) input_section->reloc_count,
2918 (info->relocateable) ? " (relocatable)" : "");
2919 #endif
2920
2921 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2922 /* Initialize howto table if needed. */
2923 ppc_elf_howto_init ();
2924
2925 local_got_offsets = elf_local_got_offsets (input_bfd);
2926
2927 splt = sgot = NULL;
2928 if (dynobj != NULL)
2929 {
2930 splt = bfd_get_section_by_name (dynobj, ".plt");
2931 sgot = bfd_get_section_by_name (dynobj, ".got");
2932 }
2933
2934 for (; rel < relend; rel++)
2935 {
2936 enum elf_ppc_reloc_type r_type = (enum elf_ppc_reloc_type)ELF32_R_TYPE (rel->r_info);
2937 bfd_vma offset = rel->r_offset;
2938 bfd_vma addend = rel->r_addend;
2939 bfd_reloc_status_type r = bfd_reloc_other;
2940 Elf_Internal_Sym *sym = (Elf_Internal_Sym *) 0;
2941 asection *sec = (asection *) 0;
2942 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) 0;
2943 const char *sym_name = (const char *) 0;
2944 reloc_howto_type *howto;
2945 unsigned long r_symndx;
2946 bfd_vma relocation;
2947 int will_become_local;
2948
2949 /* Unknown relocation handling */
2950 if ((unsigned) r_type >= (unsigned) R_PPC_max
2951 || !ppc_elf_howto_table[(int) r_type])
2952 {
2953 (*_bfd_error_handler) (_("%s: unknown relocation type %d"),
2954 bfd_archive_filename (input_bfd),
2955 (int) r_type);
2956
2957 bfd_set_error (bfd_error_bad_value);
2958 ret = false;
2959 continue;
2960 }
2961
2962 howto = ppc_elf_howto_table[(int) r_type];
2963 r_symndx = ELF32_R_SYM (rel->r_info);
2964
2965 if (info->relocateable)
2966 {
2967 /* This is a relocateable link. We don't have to change
2968 anything, unless the reloc is against a section symbol,
2969 in which case we have to adjust according to where the
2970 section symbol winds up in the output section. */
2971 if (r_symndx < symtab_hdr->sh_info)
2972 {
2973 sym = local_syms + r_symndx;
2974 if ((unsigned) ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2975 {
2976 sec = local_sections[r_symndx];
2977 addend = rel->r_addend += sec->output_offset + sym->st_value;
2978 }
2979 }
2980
2981 #ifdef DEBUG
2982 fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
2983 howto->name,
2984 (int) r_type,
2985 r_symndx,
2986 (long) offset,
2987 (long) addend);
2988 #endif
2989 continue;
2990 }
2991
2992 /* This is a final link. */
2993 if (r_symndx < symtab_hdr->sh_info)
2994 {
2995 sym = local_syms + r_symndx;
2996 sec = local_sections[r_symndx];
2997 sym_name = "<local symbol>";
2998
2999 relocation = (sec->output_section->vma
3000 + sec->output_offset
3001 + sym->st_value);
3002 /* Relocs to local symbols are always resolved. */
3003 will_become_local = 1;
3004 }
3005 else
3006 {
3007 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3008 while (h->root.type == bfd_link_hash_indirect
3009 || h->root.type == bfd_link_hash_warning)
3010 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3011 sym_name = h->root.root.string;
3012
3013 /* Can this relocation be resolved immediately? */
3014 will_become_local = SYMBOL_REFERENCES_LOCAL (info, h);
3015
3016 if (h->root.type == bfd_link_hash_defined
3017 || h->root.type == bfd_link_hash_defweak)
3018 {
3019 sec = h->root.u.def.section;
3020 if (((r_type == R_PPC_PLT32
3021 || r_type == R_PPC_PLTREL24)
3022 && splt != NULL
3023 && h->plt.offset != (bfd_vma) -1)
3024 || (r_type == R_PPC_LOCAL24PC
3025 && sec->output_section == NULL)
3026 || ((r_type == R_PPC_GOT16
3027 || r_type == R_PPC_GOT16_LO
3028 || r_type == R_PPC_GOT16_HI
3029 || r_type == R_PPC_GOT16_HA)
3030 && elf_hash_table (info)->dynamic_sections_created
3031 && (! info->shared || ! will_become_local))
3032 || (info->shared
3033 && ! will_become_local
3034 && ((input_section->flags & SEC_ALLOC) != 0
3035 /* Testing SEC_DEBUGGING here may be wrong.
3036 It's here to avoid a crash when
3037 generating a shared library with DWARF
3038 debugging information. */
3039 || ((input_section->flags & SEC_DEBUGGING) != 0
3040 && (h->elf_link_hash_flags
3041 & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
3042 && (r_type == R_PPC_ADDR32
3043 || r_type == R_PPC_ADDR24
3044 || r_type == R_PPC_ADDR16
3045 || r_type == R_PPC_ADDR16_LO
3046 || r_type == R_PPC_ADDR16_HI
3047 || r_type == R_PPC_ADDR16_HA
3048 || r_type == R_PPC_ADDR14
3049 || r_type == R_PPC_ADDR14_BRTAKEN
3050 || r_type == R_PPC_ADDR14_BRNTAKEN
3051 || r_type == R_PPC_COPY
3052 || r_type == R_PPC_GLOB_DAT
3053 || r_type == R_PPC_JMP_SLOT
3054 || r_type == R_PPC_UADDR32
3055 || r_type == R_PPC_UADDR16
3056 || r_type == R_PPC_SDAREL16
3057 || r_type == R_PPC_EMB_NADDR32
3058 || r_type == R_PPC_EMB_NADDR16
3059 || r_type == R_PPC_EMB_NADDR16_LO
3060 || r_type == R_PPC_EMB_NADDR16_HI
3061 || r_type == R_PPC_EMB_NADDR16_HA
3062 || r_type == R_PPC_EMB_SDAI16
3063 || r_type == R_PPC_EMB_SDA2I16
3064 || r_type == R_PPC_EMB_SDA2REL
3065 || r_type == R_PPC_EMB_SDA21
3066 || r_type == R_PPC_EMB_MRKREF
3067 || r_type == R_PPC_EMB_BIT_FLD
3068 || r_type == R_PPC_EMB_RELSDA
3069 || ((r_type == R_PPC_REL24
3070 || r_type == R_PPC_REL32
3071 || r_type == R_PPC_REL14
3072 || r_type == R_PPC_REL14_BRTAKEN
3073 || r_type == R_PPC_REL14_BRNTAKEN
3074 || r_type == R_PPC_RELATIVE)
3075 && strcmp (h->root.root.string,
3076 "_GLOBAL_OFFSET_TABLE_") != 0))))
3077 {
3078 /* In these cases, we don't need the relocation
3079 value. We check specially because in some
3080 obscure cases sec->output_section will be NULL. */
3081 relocation = 0;
3082 }
3083 else if (sec->output_section == NULL)
3084 {
3085 (*_bfd_error_handler)
3086 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
3087 bfd_archive_filename (input_bfd), h->root.root.string,
3088 bfd_get_section_name (input_bfd, input_section));
3089 relocation = 0;
3090 }
3091 else
3092 relocation = (h->root.u.def.value
3093 + sec->output_section->vma
3094 + sec->output_offset);
3095 }
3096 else if (h->root.type == bfd_link_hash_undefweak)
3097 relocation = 0;
3098 else if (info->shared
3099 && (!info->symbolic || info->allow_shlib_undefined)
3100 && !info->no_undefined
3101 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3102 relocation = 0;
3103 else
3104 {
3105 if (! (*info->callbacks->undefined_symbol) (info,
3106 h->root.root.string,
3107 input_bfd,
3108 input_section,
3109 rel->r_offset,
3110 (!info->shared
3111 || info->no_undefined
3112 || ELF_ST_VISIBILITY (h->other))))
3113 return false;
3114 relocation = 0;
3115 }
3116 }
3117
3118 switch ((int) r_type)
3119 {
3120 default:
3121 (*_bfd_error_handler) (_("%s: unknown relocation type %d for symbol %s"),
3122 bfd_archive_filename (input_bfd),
3123 (int) r_type, sym_name);
3124
3125 bfd_set_error (bfd_error_bad_value);
3126 ret = false;
3127 continue;
3128
3129 /* Relocations that need no special processing. */
3130 case (int) R_PPC_LOCAL24PC:
3131 /* It makes no sense to point a local relocation
3132 at a symbol not in this object. */
3133 if (h != NULL
3134 && (h->root.type == bfd_link_hash_defined
3135 || h->root.type == bfd_link_hash_defweak)
3136 && sec->output_section == NULL)
3137 {
3138 if (! (*info->callbacks->undefined_symbol) (info,
3139 h->root.root.string,
3140 input_bfd,
3141 input_section,
3142 rel->r_offset,
3143 true))
3144 return false;
3145 continue;
3146 }
3147 break;
3148
3149 /* Relocations that may need to be propagated if this is a shared
3150 object. */
3151 case (int) R_PPC_REL24:
3152 case (int) R_PPC_REL32:
3153 case (int) R_PPC_REL14:
3154 /* If these relocations are not to a named symbol, they can be
3155 handled right here, no need to bother the dynamic linker. */
3156 if (h == NULL
3157 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3158 || SYMBOL_REFERENCES_LOCAL (info, h))
3159 break;
3160 /* fall through */
3161
3162 /* Relocations that always need to be propagated if this is a shared
3163 object. */
3164 case (int) R_PPC_NONE:
3165 case (int) R_PPC_ADDR32:
3166 case (int) R_PPC_ADDR24:
3167 case (int) R_PPC_ADDR16:
3168 case (int) R_PPC_ADDR16_LO:
3169 case (int) R_PPC_ADDR16_HI:
3170 case (int) R_PPC_ADDR16_HA:
3171 case (int) R_PPC_ADDR14:
3172 case (int) R_PPC_UADDR32:
3173 case (int) R_PPC_UADDR16:
3174 if (info->shared)
3175 {
3176 Elf_Internal_Rela outrel;
3177 boolean skip;
3178
3179 #ifdef DEBUG
3180 fprintf (stderr, "ppc_elf_relocate_section need to create relocation for %s\n",
3181 (h && h->root.root.string) ? h->root.root.string : "<unknown>");
3182 #endif
3183
3184 /* When generating a shared object, these relocations
3185 are copied into the output file to be resolved at run
3186 time. */
3187
3188 if (sreloc == NULL)
3189 {
3190 const char *name;
3191
3192 name = (bfd_elf_string_from_elf_section
3193 (input_bfd,
3194 elf_elfheader (input_bfd)->e_shstrndx,
3195 elf_section_data (input_section)->rel_hdr.sh_name));
3196 if (name == NULL)
3197 return false;
3198
3199 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3200 && strcmp (bfd_get_section_name (input_bfd,
3201 input_section),
3202 name + 5) == 0);
3203
3204 sreloc = bfd_get_section_by_name (dynobj, name);
3205 BFD_ASSERT (sreloc != NULL);
3206 }
3207
3208 skip = false;
3209
3210 if (elf_section_data (input_section)->stab_info == NULL)
3211 outrel.r_offset = rel->r_offset;
3212 else
3213 {
3214 bfd_vma off;
3215
3216 off = (_bfd_stab_section_offset
3217 (output_bfd, &elf_hash_table (info)->stab_info,
3218 input_section,
3219 &elf_section_data (input_section)->stab_info,
3220 rel->r_offset));
3221 if (off == (bfd_vma) -1)
3222 skip = true;
3223 outrel.r_offset = off;
3224 }
3225
3226 outrel.r_offset += (input_section->output_section->vma
3227 + input_section->output_offset);
3228
3229 if (skip)
3230 memset (&outrel, 0, sizeof outrel);
3231 /* h->dynindx may be -1 if this symbol was marked to
3232 become local. */
3233 else if (! will_become_local)
3234 {
3235 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3236 outrel.r_addend = rel->r_addend;
3237 }
3238 else
3239 {
3240 if (r_type == R_PPC_ADDR32)
3241 {
3242 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
3243 outrel.r_addend = relocation + rel->r_addend;
3244 }
3245 else
3246 {
3247 long indx;
3248
3249 if (h == NULL)
3250 sec = local_sections[r_symndx];
3251 else
3252 {
3253 BFD_ASSERT (h->root.type == bfd_link_hash_defined
3254 || (h->root.type
3255 == bfd_link_hash_defweak));
3256 sec = h->root.u.def.section;
3257 }
3258 if (sec != NULL && bfd_is_abs_section (sec))
3259 indx = 0;
3260 else if (sec == NULL || sec->owner == NULL)
3261 {
3262 bfd_set_error (bfd_error_bad_value);
3263 return false;
3264 }
3265 else
3266 {
3267 asection *osec;
3268
3269 osec = sec->output_section;
3270 indx = elf_section_data (osec)->dynindx;
3271 BFD_ASSERT (indx > 0);
3272 #ifdef DEBUG
3273 if (indx <= 0)
3274 {
3275 printf ("indx=%d section=%s flags=%08x name=%s\n",
3276 indx, osec->name, osec->flags,
3277 h->root.root.string);
3278 }
3279 #endif
3280 }
3281
3282 outrel.r_info = ELF32_R_INFO (indx, r_type);
3283 outrel.r_addend = relocation + rel->r_addend;
3284 }
3285 }
3286
3287 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
3288 (((Elf32_External_Rela *)
3289 sreloc->contents)
3290 + sreloc->reloc_count));
3291 ++sreloc->reloc_count;
3292
3293 /* This reloc will be computed at runtime, so there's no
3294 need to do anything now, unless this is a RELATIVE
3295 reloc in an unallocated section. */
3296 if (skip
3297 || (input_section->flags & SEC_ALLOC) != 0
3298 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)
3299 continue;
3300 }
3301
3302 /* Arithmetic adjust relocations that aren't going into a
3303 shared object. */
3304 if (r_type == R_PPC_ADDR16_HA
3305 /* It's just possible that this symbol is a weak symbol
3306 that's not actually defined anywhere. In that case,
3307 'sec' would be NULL, and we should leave the symbol
3308 alone (it will be set to zero elsewhere in the link). */
3309 && sec != NULL)
3310 {
3311 addend += ((relocation + addend) & 0x8000) << 1;
3312 }
3313 break;
3314
3315 /* branch taken prediction relocations */
3316 case (int) R_PPC_ADDR14_BRTAKEN:
3317 case (int) R_PPC_REL14_BRTAKEN:
3318 insn = bfd_get_32 (output_bfd, contents + offset);
3319 if ((relocation - offset) & 0x8000)
3320 insn &= ~BRANCH_PREDICT_BIT;
3321 else
3322 insn |= BRANCH_PREDICT_BIT;
3323 bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
3324 break;
3325
3326 /* branch not taken predicition relocations */
3327 case (int) R_PPC_ADDR14_BRNTAKEN:
3328 case (int) R_PPC_REL14_BRNTAKEN:
3329 insn = bfd_get_32 (output_bfd, contents + offset);
3330 if ((relocation - offset) & 0x8000)
3331 insn |= BRANCH_PREDICT_BIT;
3332 else
3333 insn &= ~BRANCH_PREDICT_BIT;
3334 bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
3335 break;
3336
3337 /* GOT16 relocations */
3338 case (int) R_PPC_GOT16:
3339 case (int) R_PPC_GOT16_LO:
3340 case (int) R_PPC_GOT16_HI:
3341 case (int) R_PPC_GOT16_HA:
3342 /* Relocation is to the entry for this symbol in the global
3343 offset table. */
3344 BFD_ASSERT (sgot != NULL);
3345
3346 if (h != NULL)
3347 {
3348 bfd_vma off;
3349
3350 off = h->got.offset;
3351 BFD_ASSERT (off != (bfd_vma) -1);
3352
3353 if (! elf_hash_table (info)->dynamic_sections_created
3354 || (info->shared
3355 && SYMBOL_REFERENCES_LOCAL (info, h)))
3356 {
3357 /* This is actually a static link, or it is a
3358 -Bsymbolic link and the symbol is defined
3359 locally. We must initialize this entry in the
3360 global offset table. Since the offset must
3361 always be a multiple of 4, we use the least
3362 significant bit to record whether we have
3363 initialized it already.
3364
3365 When doing a dynamic link, we create a .rela.got
3366 relocation entry to initialize the value. This
3367 is done in the finish_dynamic_symbol routine. */
3368 if ((off & 1) != 0)
3369 off &= ~1;
3370 else
3371 {
3372 bfd_put_32 (output_bfd, relocation,
3373 sgot->contents + off);
3374 h->got.offset |= 1;
3375 }
3376 }
3377
3378 relocation = sgot->output_offset + off - 4;
3379 }
3380 else
3381 {
3382 bfd_vma off;
3383
3384 BFD_ASSERT (local_got_offsets != NULL
3385 && local_got_offsets[r_symndx] != (bfd_vma) -1);
3386
3387 off = local_got_offsets[r_symndx];
3388
3389 /* The offset must always be a multiple of 4. We use
3390 the least significant bit to record whether we have
3391 already processed this entry. */
3392 if ((off & 1) != 0)
3393 off &= ~1;
3394 else
3395 {
3396 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
3397
3398 if (info->shared)
3399 {
3400 asection *srelgot;
3401 Elf_Internal_Rela outrel;
3402
3403 /* We need to generate a R_PPC_RELATIVE reloc
3404 for the dynamic linker. */
3405 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3406 BFD_ASSERT (srelgot != NULL);
3407
3408 outrel.r_offset = (sgot->output_section->vma
3409 + sgot->output_offset
3410 + off);
3411 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
3412 outrel.r_addend = relocation;
3413 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
3414 (((Elf32_External_Rela *)
3415 srelgot->contents)
3416 + srelgot->reloc_count));
3417 ++srelgot->reloc_count;
3418 }
3419
3420 local_got_offsets[r_symndx] |= 1;
3421 }
3422
3423 relocation = sgot->output_offset + off - 4;
3424 }
3425 break;
3426
3427 /* Indirect .sdata relocation */
3428 case (int) R_PPC_EMB_SDAI16:
3429 BFD_ASSERT (sdata != NULL);
3430 relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info,
3431 sdata, h, relocation, rel,
3432 R_PPC_RELATIVE);
3433 break;
3434
3435 /* Indirect .sdata2 relocation */
3436 case (int) R_PPC_EMB_SDA2I16:
3437 BFD_ASSERT (sdata2 != NULL);
3438 relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info,
3439 sdata2, h, relocation, rel,
3440 R_PPC_RELATIVE);
3441 break;
3442
3443 /* Handle the TOC16 reloc. We want to use the offset within the .got
3444 section, not the actual VMA. This is appropriate when generating
3445 an embedded ELF object, for which the .got section acts like the
3446 AIX .toc section. */
3447 case (int) R_PPC_TOC16: /* phony GOT16 relocations */
3448 BFD_ASSERT (sec != (asection *) 0);
3449 BFD_ASSERT (bfd_is_und_section (sec)
3450 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
3451 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)
3452
3453 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
3454 break;
3455
3456 case (int) R_PPC_PLTREL24:
3457 /* Relocation is to the entry for this symbol in the
3458 procedure linkage table. */
3459 BFD_ASSERT (h != NULL);
3460
3461 if (h->plt.offset == (bfd_vma) -1
3462 || splt == NULL)
3463 {
3464 /* We didn't make a PLT entry for this symbol. This
3465 happens when statically linking PIC code, or when
3466 using -Bsymbolic. */
3467 break;
3468 }
3469
3470 relocation = (splt->output_section->vma
3471 + splt->output_offset
3472 + h->plt.offset);
3473 break;
3474
3475 /* relocate against _SDA_BASE_ */
3476 case (int) R_PPC_SDAREL16:
3477 {
3478 const char *name;
3479
3480 BFD_ASSERT (sec != (asection *) 0);
3481 name = bfd_get_section_name (abfd, sec->output_section);
3482 if (strcmp (name, ".sdata") != 0
3483 && strcmp (name, ".sbss") != 0)
3484 {
3485 (*_bfd_error_handler) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3486 bfd_archive_filename (input_bfd),
3487 sym_name,
3488 ppc_elf_howto_table[(int) r_type]->name,
3489 name);
3490 }
3491 addend -= (sdata->sym_hash->root.u.def.value
3492 + sdata->sym_hash->root.u.def.section->output_section->vma
3493 + sdata->sym_hash->root.u.def.section->output_offset);
3494 }
3495 break;
3496
3497 /* relocate against _SDA2_BASE_ */
3498 case (int) R_PPC_EMB_SDA2REL:
3499 {
3500 const char *name;
3501
3502 BFD_ASSERT (sec != (asection *) 0);
3503 name = bfd_get_section_name (abfd, sec->output_section);
3504 if (strcmp (name, ".sdata2") != 0 && strcmp (name, ".sbss2") != 0)
3505 {
3506 (*_bfd_error_handler) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3507 bfd_archive_filename (input_bfd),
3508 sym_name,
3509 ppc_elf_howto_table[(int) r_type]->name,
3510 name);
3511
3512 bfd_set_error (bfd_error_bad_value);
3513 ret = false;
3514 continue;
3515 }
3516 addend -= (sdata2->sym_hash->root.u.def.value
3517 + sdata2->sym_hash->root.u.def.section->output_section->vma
3518 + sdata2->sym_hash->root.u.def.section->output_offset);
3519 }
3520 break;
3521
3522 /* relocate against either _SDA_BASE_, _SDA2_BASE_, or 0 */
3523 case (int) R_PPC_EMB_SDA21:
3524 case (int) R_PPC_EMB_RELSDA:
3525 {
3526 const char *name;
3527 int reg;
3528
3529 BFD_ASSERT (sec != (asection *) 0);
3530 name = bfd_get_section_name (abfd, sec->output_section);
3531 if (strcmp (name, ".sdata") == 0 || strcmp (name, ".sbss") == 0)
3532 {
3533 reg = 13;
3534 addend -= (sdata->sym_hash->root.u.def.value
3535 + sdata->sym_hash->root.u.def.section->output_section->vma
3536 + sdata->sym_hash->root.u.def.section->output_offset);
3537 }
3538
3539 else if (strcmp (name, ".sdata2") == 0
3540 || strcmp (name, ".sbss2") == 0)
3541 {
3542 reg = 2;
3543 addend -= (sdata2->sym_hash->root.u.def.value
3544 + sdata2->sym_hash->root.u.def.section->output_section->vma
3545 + sdata2->sym_hash->root.u.def.section->output_offset);
3546 }
3547
3548 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
3549 || strcmp (name, ".PPC.EMB.sbss0") == 0)
3550 {
3551 reg = 0;
3552 }
3553
3554 else
3555 {
3556 (*_bfd_error_handler) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3557 bfd_archive_filename (input_bfd),
3558 sym_name,
3559 ppc_elf_howto_table[(int) r_type]->name,
3560 name);
3561
3562 bfd_set_error (bfd_error_bad_value);
3563 ret = false;
3564 continue;
3565 }
3566
3567 if (r_type == R_PPC_EMB_SDA21)
3568 { /* fill in register field */
3569 insn = bfd_get_32 (output_bfd, contents + offset);
3570 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
3571 bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
3572 }
3573 }
3574 break;
3575
3576 /* Relocate against the beginning of the section */
3577 case (int) R_PPC_SECTOFF:
3578 case (int) R_PPC_SECTOFF_LO:
3579 case (int) R_PPC_SECTOFF_HI:
3580 BFD_ASSERT (sec != (asection *) 0);
3581 addend -= sec->output_section->vma;
3582 break;
3583
3584 case (int) R_PPC_SECTOFF_HA:
3585 BFD_ASSERT (sec != (asection *) 0);
3586 addend -= sec->output_section->vma;
3587 addend += ((relocation + addend) & 0x8000) << 1;
3588 break;
3589
3590 /* Negative relocations */
3591 case (int) R_PPC_EMB_NADDR32:
3592 case (int) R_PPC_EMB_NADDR16:
3593 case (int) R_PPC_EMB_NADDR16_LO:
3594 case (int) R_PPC_EMB_NADDR16_HI:
3595 addend -= 2 * relocation;
3596 break;
3597
3598 case (int) R_PPC_EMB_NADDR16_HA:
3599 addend -= 2 * relocation;
3600 addend += ((relocation + addend) & 0x8000) << 1;
3601 break;
3602
3603 /* NOP relocation that prevents garbage collecting linkers from omitting a
3604 reference. */
3605 case (int) R_PPC_EMB_MRKREF:
3606 continue;
3607
3608 case (int) R_PPC_COPY:
3609 case (int) R_PPC_GLOB_DAT:
3610 case (int) R_PPC_JMP_SLOT:
3611 case (int) R_PPC_RELATIVE:
3612 case (int) R_PPC_PLT32:
3613 case (int) R_PPC_PLTREL32:
3614 case (int) R_PPC_PLT16_LO:
3615 case (int) R_PPC_PLT16_HI:
3616 case (int) R_PPC_PLT16_HA:
3617 case (int) R_PPC_EMB_RELSEC16:
3618 case (int) R_PPC_EMB_RELST_LO:
3619 case (int) R_PPC_EMB_RELST_HI:
3620 case (int) R_PPC_EMB_RELST_HA:
3621 case (int) R_PPC_EMB_BIT_FLD:
3622 (*_bfd_error_handler) (_("%s: Relocation %s is not yet supported for symbol %s."),
3623 bfd_archive_filename (input_bfd),
3624 ppc_elf_howto_table[(int) r_type]->name,
3625 sym_name);
3626
3627 bfd_set_error (bfd_error_invalid_operation);
3628 ret = false;
3629 continue;
3630
3631 case (int) R_PPC_GNU_VTINHERIT:
3632 case (int) R_PPC_GNU_VTENTRY:
3633 /* These are no-ops in the end. */
3634 continue;
3635 }
3636
3637 #ifdef DEBUG
3638 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n",
3639 howto->name,
3640 (int) r_type,
3641 sym_name,
3642 r_symndx,
3643 (long) offset,
3644 (long) addend);
3645 #endif
3646
3647 r = _bfd_final_link_relocate (howto,
3648 input_bfd,
3649 input_section,
3650 contents,
3651 offset,
3652 relocation,
3653 addend);
3654
3655 if (r == bfd_reloc_ok)
3656 ;
3657 else if (r == bfd_reloc_overflow)
3658 {
3659 const char *name;
3660
3661 if (h != NULL)
3662 {
3663 if (h->root.type == bfd_link_hash_undefweak
3664 && howto->pc_relative)
3665 {
3666 /* Assume this is a call protected by other code that
3667 detect the symbol is undefined. If this is the case,
3668 we can safely ignore the overflow. If not, the
3669 program is hosed anyway, and a little warning isn't
3670 going to help. */
3671
3672 continue;
3673 }
3674
3675 name = h->root.root.string;
3676 }
3677 else
3678 {
3679 name = bfd_elf_string_from_elf_section (input_bfd,
3680 symtab_hdr->sh_link,
3681 sym->st_name);
3682 if (name == NULL)
3683 continue;
3684 if (*name == '\0')
3685 name = bfd_section_name (input_bfd, sec);
3686 }
3687
3688 if (! (*info->callbacks->reloc_overflow) (info,
3689 name,
3690 howto->name,
3691 (bfd_vma) 0,
3692 input_bfd,
3693 input_section,
3694 offset))
3695 return false;
3696 }
3697 else
3698 ret = false;
3699 }
3700
3701 #ifdef DEBUG
3702 fprintf (stderr, "\n");
3703 #endif
3704
3705 return ret;
3706 }
3707
3708 static enum elf_reloc_type_class
3709 ppc_elf_reloc_type_class (rela)
3710 const Elf_Internal_Rela *rela;
3711 {
3712 switch ((int) ELF32_R_TYPE (rela->r_info))
3713 {
3714 case R_PPC_RELATIVE:
3715 return reloc_class_relative;
3716 case R_PPC_REL24:
3717 case R_PPC_ADDR24:
3718 case R_PPC_JMP_SLOT:
3719 return reloc_class_plt;
3720 case R_PPC_COPY:
3721 return reloc_class_copy;
3722 default:
3723 return reloc_class_normal;
3724 }
3725 }
3726 \f
3727 /* Support for core dump NOTE sections */
3728 static boolean
3729 ppc_elf_grok_prstatus (abfd, note)
3730 bfd *abfd;
3731 Elf_Internal_Note *note;
3732 {
3733 int offset;
3734 unsigned int raw_size;
3735
3736 switch (note->descsz)
3737 {
3738 default:
3739 return false;
3740
3741 case 268: /* Linux/PPC */
3742 /* pr_cursig */
3743 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3744
3745 /* pr_pid */
3746 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3747
3748 /* pr_reg */
3749 offset = 72;
3750 raw_size = 192;
3751
3752 break;
3753 }
3754
3755 /* Make a ".reg/999" section. */
3756 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3757 raw_size, note->descpos + offset);
3758 }
3759
3760 static boolean
3761 ppc_elf_grok_psinfo (abfd, note)
3762 bfd *abfd;
3763 Elf_Internal_Note *note;
3764 {
3765 switch (note->descsz)
3766 {
3767 default:
3768 return false;
3769
3770 case 128: /* Linux/PPC elf_prpsinfo */
3771 elf_tdata (abfd)->core_program
3772 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
3773 elf_tdata (abfd)->core_command
3774 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
3775 }
3776
3777 /* Note that for some reason, a spurious space is tacked
3778 onto the end of the args in some (at least one anyway)
3779 implementations, so strip it off if it exists. */
3780
3781 {
3782 char *command = elf_tdata (abfd)->core_command;
3783 int n = strlen (command);
3784
3785 if (0 < n && command[n - 1] == ' ')
3786 command[n - 1] = '\0';
3787 }
3788
3789 return true;
3790 }
3791 \f
3792 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
3793 #define TARGET_LITTLE_NAME "elf32-powerpcle"
3794 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
3795 #define TARGET_BIG_NAME "elf32-powerpc"
3796 #define ELF_ARCH bfd_arch_powerpc
3797 #define ELF_MACHINE_CODE EM_PPC
3798 #define ELF_MAXPAGESIZE 0x10000
3799 #define elf_info_to_howto ppc_elf_info_to_howto
3800
3801 #ifdef EM_CYGNUS_POWERPC
3802 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
3803 #endif
3804
3805 #ifdef EM_PPC_OLD
3806 #define ELF_MACHINE_ALT2 EM_PPC_OLD
3807 #endif
3808
3809 #define elf_backend_plt_not_loaded 1
3810 #define elf_backend_got_symbol_offset 4
3811 #define elf_backend_can_gc_sections 1
3812 #define elf_backend_can_refcount 1
3813 #define elf_backend_got_header_size 12
3814 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
3815
3816 #define bfd_elf32_bfd_copy_private_bfd_data ppc_elf_copy_private_bfd_data
3817 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
3818 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
3819 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
3820 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
3821 #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
3822
3823 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
3824 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
3825 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
3826 #define elf_backend_relocate_section ppc_elf_relocate_section
3827 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
3828 #define elf_backend_check_relocs ppc_elf_check_relocs
3829 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
3830 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
3831 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
3832 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
3833 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
3834 #define elf_backend_fake_sections ppc_elf_fake_sections
3835 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
3836 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
3837 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
3838 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
3839 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
3840
3841 #include "elf32-target.h"
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