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[binutils.git] / bfd / elf32-ppc.c
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252b5132 1/* PowerPC-specific support for 32-bit ELF
b491616a 2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
7898deda 3 Free Software Foundation, Inc.
252b5132
RH		 4 Written by Ian Lance Taylor, Cygnus Support.
5
6This file is part of BFD, the Binary File Descriptor library.
7
8This program is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 2 of the License, or
11(at your option) any later version.
12
13This program is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with this program; if not, write to the Free Software
20Foundation, 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
f0fe0e16 34/* RELA relocations are used here. */
252b5132 35
252b5132
RH		 36static reloc_howto_type *ppc_elf_reloc_type_lookup
37 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
38static void ppc_elf_info_to_howto
947216bf 39 PARAMS ((bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst));
252b5132 40static void ppc_elf_howto_init PARAMS ((void));
a7b97311
AM		 41static int ppc_elf_sort_rela PARAMS ((const PTR, const PTR));
42static boolean ppc_elf_relax_section
43 PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
252b5132
RH		 44static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
45 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
feee612b 46static boolean ppc_elf_object_p PARAMS ((bfd *));
252b5132 47static boolean ppc_elf_set_private_flags PARAMS ((bfd *, flagword));
252b5132
RH		 48static boolean ppc_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
49
50static int ppc_elf_additional_program_headers PARAMS ((bfd *));
51static boolean ppc_elf_modify_segment_map PARAMS ((bfd *));
52
41fcb14e
AM		 53static asection *ppc_elf_create_got
54 PARAMS ((bfd *, struct bfd_link_info *));
252b5132
RH		 55static boolean ppc_elf_create_dynamic_sections
56 PARAMS ((bfd *, struct bfd_link_info *));
57
58static boolean ppc_elf_section_from_shdr PARAMS ((bfd *,
947216bf 59 Elf_Internal_Shdr *,
90937f86 60 const char *));
252b5132 61static boolean ppc_elf_fake_sections
947216bf 62 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
252b5132
RH		 63
64static elf_linker_section_t *ppc_elf_create_linker_section
65 PARAMS ((bfd *abfd,
66 struct bfd_link_info *info,
67 enum elf_linker_section_enum));
68
69static boolean ppc_elf_check_relocs PARAMS ((bfd *,
70 struct bfd_link_info *,
71 asection *,
72 const Elf_Internal_Rela *));
73
1e2f5b6e 74static asection * ppc_elf_gc_mark_hook PARAMS ((asection *sec,
252b5132
RH		 75 struct bfd_link_info *info,
76 Elf_Internal_Rela *rel,
77 struct elf_link_hash_entry *h,
78 Elf_Internal_Sym *sym));
79
80static boolean ppc_elf_gc_sweep_hook PARAMS ((bfd *abfd,
81 struct bfd_link_info *info,
82 asection *sec,
83 const Elf_Internal_Rela *relocs));
84
85static boolean ppc_elf_adjust_dynamic_symbol PARAMS ((struct bfd_link_info *,
86 struct elf_link_hash_entry *));
87
252b5132
RH		 88static boolean ppc_elf_size_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *));
89
90static boolean ppc_elf_relocate_section PARAMS ((bfd *,
91 struct bfd_link_info *info,
92 bfd *,
93 asection *,
94 bfd_byte *,
95 Elf_Internal_Rela *relocs,
96 Elf_Internal_Sym *local_syms,
97 asection **));
98
99static boolean ppc_elf_add_symbol_hook PARAMS ((bfd *,
100 struct bfd_link_info *,
101 const Elf_Internal_Sym *,
102 const char **,
103 flagword *,
104 asection **,
105 bfd_vma *));
106
107static boolean ppc_elf_finish_dynamic_symbol PARAMS ((bfd *,
108 struct bfd_link_info *,
109 struct elf_link_hash_entry *,
110 Elf_Internal_Sym *));
111
112static boolean ppc_elf_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *));
f51e552e
AM		 113static enum elf_reloc_type_class ppc_elf_reloc_type_class
114 PARAMS ((const Elf_Internal_Rela *));
2e67030c
DJ		 115static boolean ppc_elf_grok_prstatus
116 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
117static boolean ppc_elf_grok_psinfo
118 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
252b5132
RH		 119
120#define BRANCH_PREDICT_BIT 0x200000 /* branch prediction bit for branch taken relocs */
121#define RA_REGISTER_MASK 0x001f0000 /* mask to set RA in memory instructions */
122#define RA_REGISTER_SHIFT 16 /* value to shift register by to insert RA */
123
124/* The name of the dynamic interpreter. This is put in the .interp
125 section. */
126
127#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
128
129/* The size in bytes of an entry in the procedure linkage table. */
130#define PLT_ENTRY_SIZE 12
131/* The initial size of the plt reserved for the dynamic linker. */
132#define PLT_INITIAL_ENTRY_SIZE 72
133/* The size of the gap between entries in the PLT. */
134#define PLT_SLOT_SIZE 8
135/* The number of single-slot PLT entries (the rest use two slots). */
136#define PLT_NUM_SINGLE_ENTRIES 8192
137
e1e0340b
GK		 138/* Will references to this symbol always reference the symbol
139 in this object? */
140#define SYMBOL_REFERENCES_LOCAL(INFO, H) \
141 ((! INFO->shared \
142 || INFO->symbolic \
143 || H->dynindx == -1 \
144 || ELF_ST_VISIBILITY (H->other) == STV_INTERNAL \
145 || ELF_ST_VISIBILITY (H->other) == STV_HIDDEN) \
146 && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
147
148/* Will _calls_ to this symbol always call the version in this object? */
149#define SYMBOL_CALLS_LOCAL(INFO, H) \
150 ((! INFO->shared \
151 || INFO->symbolic \
152 || H->dynindx == -1 \
153 || ELF_ST_VISIBILITY (H->other) != STV_DEFAULT) \
154 && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
252b5132 155\f
8da6118f 156static reloc_howto_type *ppc_elf_howto_table[(int) R_PPC_max];
252b5132 157
8da6118f 158static reloc_howto_type ppc_elf_howto_raw[] = {
252b5132
RH		 159 /* This reloc does nothing. */
160 HOWTO (R_PPC_NONE, /* type */
161 0, /* rightshift */
162 2, /* size (0 = byte, 1 = short, 2 = long) */
163 32, /* bitsize */
164 false, /* pc_relative */
165 0, /* bitpos */
166 complain_overflow_bitfield, /* complain_on_overflow */
167 bfd_elf_generic_reloc, /* special_function */
168 "R_PPC_NONE", /* name */
169 false, /* partial_inplace */
170 0, /* src_mask */
171 0, /* dst_mask */
172 false), /* pcrel_offset */
173
174 /* A standard 32 bit relocation. */
175 HOWTO (R_PPC_ADDR32, /* type */
176 0, /* rightshift */
177 2, /* size (0 = byte, 1 = short, 2 = long) */
178 32, /* bitsize */
179 false, /* pc_relative */
180 0, /* bitpos */
181 complain_overflow_bitfield, /* complain_on_overflow */
182 bfd_elf_generic_reloc, /* special_function */
183 "R_PPC_ADDR32", /* name */
184 false, /* partial_inplace */
185 0, /* src_mask */
186 0xffffffff, /* dst_mask */
187 false), /* pcrel_offset */
188
189 /* An absolute 26 bit branch; the lower two bits must be zero.
190 FIXME: we don't check that, we just clear them. */
191 HOWTO (R_PPC_ADDR24, /* type */
192 0, /* rightshift */
193 2, /* size (0 = byte, 1 = short, 2 = long) */
194 26, /* bitsize */
195 false, /* pc_relative */
196 0, /* bitpos */
197 complain_overflow_bitfield, /* complain_on_overflow */
198 bfd_elf_generic_reloc, /* special_function */
199 "R_PPC_ADDR24", /* name */
200 false, /* partial_inplace */
201 0, /* src_mask */
202 0x3fffffc, /* dst_mask */
203 false), /* pcrel_offset */
204
205 /* A standard 16 bit relocation. */
206 HOWTO (R_PPC_ADDR16, /* type */
207 0, /* rightshift */
208 1, /* size (0 = byte, 1 = short, 2 = long) */
209 16, /* bitsize */
210 false, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_bitfield, /* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_PPC_ADDR16", /* name */
215 false, /* partial_inplace */
216 0, /* src_mask */
217 0xffff, /* dst_mask */
218 false), /* pcrel_offset */
219
220 /* A 16 bit relocation without overflow. */
221 HOWTO (R_PPC_ADDR16_LO, /* type */
222 0, /* rightshift */
223 1, /* size (0 = byte, 1 = short, 2 = long) */
224 16, /* bitsize */
225 false, /* pc_relative */
226 0, /* bitpos */
227 complain_overflow_dont,/* complain_on_overflow */
228 bfd_elf_generic_reloc, /* special_function */
229 "R_PPC_ADDR16_LO", /* name */
230 false, /* partial_inplace */
231 0, /* src_mask */
232 0xffff, /* dst_mask */
233 false), /* pcrel_offset */
234
235 /* The high order 16 bits of an address. */
236 HOWTO (R_PPC_ADDR16_HI, /* type */
237 16, /* rightshift */
238 1, /* size (0 = byte, 1 = short, 2 = long) */
239 16, /* bitsize */
240 false, /* pc_relative */
241 0, /* bitpos */
242 complain_overflow_dont, /* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_PPC_ADDR16_HI", /* name */
245 false, /* partial_inplace */
246 0, /* src_mask */
247 0xffff, /* dst_mask */
248 false), /* pcrel_offset */
249
250 /* The high order 16 bits of an address, plus 1 if the contents of
8da6118f 251 the low 16 bits, treated as a signed number, is negative. */
252b5132
RH		 252 HOWTO (R_PPC_ADDR16_HA, /* type */
253 16, /* rightshift */
254 1, /* size (0 = byte, 1 = short, 2 = long) */
255 16, /* bitsize */
256 false, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_dont, /* complain_on_overflow */
259 ppc_elf_addr16_ha_reloc, /* special_function */
260 "R_PPC_ADDR16_HA", /* name */
261 false, /* partial_inplace */
262 0, /* src_mask */
263 0xffff, /* dst_mask */
264 false), /* pcrel_offset */
265
266 /* An absolute 16 bit branch; the lower two bits must be zero.
267 FIXME: we don't check that, we just clear them. */
268 HOWTO (R_PPC_ADDR14, /* type */
269 0, /* rightshift */
270 2, /* size (0 = byte, 1 = short, 2 = long) */
271 16, /* bitsize */
272 false, /* pc_relative */
273 0, /* bitpos */
274 complain_overflow_bitfield, /* complain_on_overflow */
275 bfd_elf_generic_reloc, /* special_function */
276 "R_PPC_ADDR14", /* name */
277 false, /* partial_inplace */
278 0, /* src_mask */
279 0xfffc, /* dst_mask */
280 false), /* pcrel_offset */
281
282 /* An absolute 16 bit branch, for which bit 10 should be set to
283 indicate that the branch is expected to be taken. The lower two
8da6118f 284 bits must be zero. */
252b5132
RH		 285 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
286 0, /* rightshift */
287 2, /* size (0 = byte, 1 = short, 2 = long) */
288 16, /* bitsize */
289 false, /* pc_relative */
290 0, /* bitpos */
291 complain_overflow_bitfield, /* complain_on_overflow */
292 bfd_elf_generic_reloc, /* special_function */
293 "R_PPC_ADDR14_BRTAKEN",/* name */
294 false, /* partial_inplace */
295 0, /* src_mask */
296 0xfffc, /* dst_mask */
297 false), /* pcrel_offset */
298
299 /* An absolute 16 bit branch, for which bit 10 should be set to
300 indicate that the branch is not expected to be taken. The lower
301 two bits must be zero. */
302 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
303 0, /* rightshift */
304 2, /* size (0 = byte, 1 = short, 2 = long) */
305 16, /* bitsize */
306 false, /* pc_relative */
307 0, /* bitpos */
308 complain_overflow_bitfield, /* complain_on_overflow */
309 bfd_elf_generic_reloc, /* special_function */
310 "R_PPC_ADDR14_BRNTAKEN",/* name */
311 false, /* partial_inplace */
312 0, /* src_mask */
313 0xfffc, /* dst_mask */
314 false), /* pcrel_offset */
315
8da6118f 316 /* A relative 26 bit branch; the lower two bits must be zero. */
252b5132
RH		 317 HOWTO (R_PPC_REL24, /* type */
318 0, /* rightshift */
319 2, /* size (0 = byte, 1 = short, 2 = long) */
320 26, /* bitsize */
321 true, /* pc_relative */
322 0, /* bitpos */
323 complain_overflow_signed, /* complain_on_overflow */
324 bfd_elf_generic_reloc, /* special_function */
325 "R_PPC_REL24", /* name */
326 false, /* partial_inplace */
327 0, /* src_mask */
328 0x3fffffc, /* dst_mask */
329 true), /* pcrel_offset */
330
8da6118f 331 /* A relative 16 bit branch; the lower two bits must be zero. */
252b5132
RH		 332 HOWTO (R_PPC_REL14, /* type */
333 0, /* rightshift */
334 2, /* size (0 = byte, 1 = short, 2 = long) */
335 16, /* bitsize */
336 true, /* pc_relative */
337 0, /* bitpos */
338 complain_overflow_signed, /* complain_on_overflow */
339 bfd_elf_generic_reloc, /* special_function */
340 "R_PPC_REL14", /* name */
341 false, /* partial_inplace */
342 0, /* src_mask */
343 0xfffc, /* dst_mask */
344 true), /* pcrel_offset */
345
8da6118f 346 /* A relative 16 bit branch. Bit 10 should be set to indicate that
252b5132
RH		 347 the branch is expected to be taken. The lower two bits must be
348 zero. */
349 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
350 0, /* rightshift */
351 2, /* size (0 = byte, 1 = short, 2 = long) */
352 16, /* bitsize */
353 true, /* pc_relative */
354 0, /* bitpos */
355 complain_overflow_signed, /* complain_on_overflow */
356 bfd_elf_generic_reloc, /* special_function */
357 "R_PPC_REL14_BRTAKEN", /* name */
358 false, /* partial_inplace */
359 0, /* src_mask */
360 0xfffc, /* dst_mask */
361 true), /* pcrel_offset */
362
8da6118f 363 /* A relative 16 bit branch. Bit 10 should be set to indicate that
252b5132
RH		 364 the branch is not expected to be taken. The lower two bits must
365 be zero. */
366 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
367 0, /* rightshift */
368 2, /* size (0 = byte, 1 = short, 2 = long) */
369 16, /* bitsize */
370 true, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_signed, /* complain_on_overflow */
373 bfd_elf_generic_reloc, /* special_function */
374 "R_PPC_REL14_BRNTAKEN",/* name */
375 false, /* partial_inplace */
376 0, /* src_mask */
377 0xfffc, /* dst_mask */
378 true), /* pcrel_offset */
379
380 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
381 symbol. */
382 HOWTO (R_PPC_GOT16, /* type */
383 0, /* rightshift */
384 1, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 false, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_PPC_GOT16", /* name */
391 false, /* partial_inplace */
392 0, /* src_mask */
393 0xffff, /* dst_mask */
394 false), /* pcrel_offset */
395
396 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
397 the symbol. */
398 HOWTO (R_PPC_GOT16_LO, /* type */
399 0, /* rightshift */
400 1, /* size (0 = byte, 1 = short, 2 = long) */
401 16, /* bitsize */
402 false, /* pc_relative */
403 0, /* bitpos */
404 complain_overflow_dont, /* complain_on_overflow */
405 bfd_elf_generic_reloc, /* special_function */
406 "R_PPC_GOT16_LO", /* name */
407 false, /* partial_inplace */
408 0, /* src_mask */
409 0xffff, /* dst_mask */
410 false), /* pcrel_offset */
411
412 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
413 the symbol. */
414 HOWTO (R_PPC_GOT16_HI, /* type */
415 16, /* rightshift */
416 1, /* size (0 = byte, 1 = short, 2 = long) */
417 16, /* bitsize */
418 false, /* pc_relative */
419 0, /* bitpos */
420 complain_overflow_bitfield, /* complain_on_overflow */
421 bfd_elf_generic_reloc, /* special_function */
422 "R_PPC_GOT16_HI", /* name */
423 false, /* partial_inplace */
424 0, /* src_mask */
425 0xffff, /* dst_mask */
426 false), /* pcrel_offset */
427
428 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
429 the symbol. */
430 HOWTO (R_PPC_GOT16_HA, /* type */
431 16, /* rightshift */
432 1, /* size (0 = byte, 1 = short, 2 = long) */
433 16, /* bitsize */
434 false, /* pc_relative */
435 0, /* bitpos */
436 complain_overflow_bitfield, /* complain_on_overflow */
437 ppc_elf_addr16_ha_reloc, /* special_function */
438 "R_PPC_GOT16_HA", /* name */
439 false, /* partial_inplace */
440 0, /* src_mask */
441 0xffff, /* dst_mask */
442 false), /* pcrel_offset */
443
444 /* Like R_PPC_REL24, but referring to the procedure linkage table
445 entry for the symbol. */
446 HOWTO (R_PPC_PLTREL24, /* type */
447 0, /* rightshift */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
449 26, /* bitsize */
450 true, /* pc_relative */
451 0, /* bitpos */
452 complain_overflow_signed, /* complain_on_overflow */
453 bfd_elf_generic_reloc, /* special_function */
454 "R_PPC_PLTREL24", /* name */
455 false, /* partial_inplace */
456 0, /* src_mask */
457 0x3fffffc, /* dst_mask */
458 true), /* pcrel_offset */
459
460 /* This is used only by the dynamic linker. The symbol should exist
461 both in the object being run and in some shared library. The
462 dynamic linker copies the data addressed by the symbol from the
463 shared library into the object, because the object being
464 run has to have the data at some particular address. */
465 HOWTO (R_PPC_COPY, /* type */
466 0, /* rightshift */
467 2, /* size (0 = byte, 1 = short, 2 = long) */
468 32, /* bitsize */
469 false, /* pc_relative */
470 0, /* bitpos */
471 complain_overflow_bitfield, /* complain_on_overflow */
472 bfd_elf_generic_reloc, /* special_function */
473 "R_PPC_COPY", /* name */
474 false, /* partial_inplace */
475 0, /* src_mask */
476 0, /* dst_mask */
477 false), /* pcrel_offset */
478
479 /* Like R_PPC_ADDR32, but used when setting global offset table
480 entries. */
481 HOWTO (R_PPC_GLOB_DAT, /* type */
482 0, /* rightshift */
483 2, /* size (0 = byte, 1 = short, 2 = long) */
484 32, /* bitsize */
485 false, /* pc_relative */
486 0, /* bitpos */
487 complain_overflow_bitfield, /* complain_on_overflow */
488 bfd_elf_generic_reloc, /* special_function */
489 "R_PPC_GLOB_DAT", /* name */
490 false, /* partial_inplace */
491 0, /* src_mask */
492 0xffffffff, /* dst_mask */
493 false), /* pcrel_offset */
494
495 /* Marks a procedure linkage table entry for a symbol. */
496 HOWTO (R_PPC_JMP_SLOT, /* type */
497 0, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 32, /* bitsize */
500 false, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_PPC_JMP_SLOT", /* name */
505 false, /* partial_inplace */
506 0, /* src_mask */
507 0, /* dst_mask */
508 false), /* pcrel_offset */
509
510 /* Used only by the dynamic linker. When the object is run, this
511 longword is set to the load address of the object, plus the
512 addend. */
513 HOWTO (R_PPC_RELATIVE, /* type */
514 0, /* rightshift */
515 2, /* size (0 = byte, 1 = short, 2 = long) */
516 32, /* bitsize */
517 false, /* pc_relative */
518 0, /* bitpos */
519 complain_overflow_bitfield, /* complain_on_overflow */
520 bfd_elf_generic_reloc, /* special_function */
521 "R_PPC_RELATIVE", /* name */
522 false, /* partial_inplace */
523 0, /* src_mask */
524 0xffffffff, /* dst_mask */
525 false), /* pcrel_offset */
526
527 /* Like R_PPC_REL24, but uses the value of the symbol within the
528 object rather than the final value. Normally used for
529 _GLOBAL_OFFSET_TABLE_. */
530 HOWTO (R_PPC_LOCAL24PC, /* type */
531 0, /* rightshift */
532 2, /* size (0 = byte, 1 = short, 2 = long) */
533 26, /* bitsize */
534 true, /* pc_relative */
535 0, /* bitpos */
536 complain_overflow_signed, /* complain_on_overflow */
537 bfd_elf_generic_reloc, /* special_function */
538 "R_PPC_LOCAL24PC", /* name */
539 false, /* partial_inplace */
540 0, /* src_mask */
541 0x3fffffc, /* dst_mask */
542 true), /* pcrel_offset */
543
544 /* Like R_PPC_ADDR32, but may be unaligned. */
545 HOWTO (R_PPC_UADDR32, /* type */
546 0, /* rightshift */
547 2, /* size (0 = byte, 1 = short, 2 = long) */
548 32, /* bitsize */
549 false, /* pc_relative */
550 0, /* bitpos */
551 complain_overflow_bitfield, /* complain_on_overflow */
552 bfd_elf_generic_reloc, /* special_function */
553 "R_PPC_UADDR32", /* name */
554 false, /* partial_inplace */
555 0, /* src_mask */
556 0xffffffff, /* dst_mask */
557 false), /* pcrel_offset */
558
559 /* Like R_PPC_ADDR16, but may be unaligned. */
560 HOWTO (R_PPC_UADDR16, /* type */
561 0, /* rightshift */
562 1, /* size (0 = byte, 1 = short, 2 = long) */
563 16, /* bitsize */
564 false, /* pc_relative */
565 0, /* bitpos */
566 complain_overflow_bitfield, /* complain_on_overflow */
567 bfd_elf_generic_reloc, /* special_function */
568 "R_PPC_UADDR16", /* name */
569 false, /* partial_inplace */
570 0, /* src_mask */
571 0xffff, /* dst_mask */
572 false), /* pcrel_offset */
573
574 /* 32-bit PC relative */
575 HOWTO (R_PPC_REL32, /* type */
576 0, /* rightshift */
577 2, /* size (0 = byte, 1 = short, 2 = long) */
578 32, /* bitsize */
579 true, /* pc_relative */
580 0, /* bitpos */
581 complain_overflow_bitfield, /* complain_on_overflow */
582 bfd_elf_generic_reloc, /* special_function */
583 "R_PPC_REL32", /* name */
584 false, /* partial_inplace */
585 0, /* src_mask */
586 0xffffffff, /* dst_mask */
587 true), /* pcrel_offset */
588
589 /* 32-bit relocation to the symbol's procedure linkage table.
c3668558 590 FIXME: not supported. */
252b5132
RH		 591 HOWTO (R_PPC_PLT32, /* type */
592 0, /* rightshift */
593 2, /* size (0 = byte, 1 = short, 2 = long) */
594 32, /* bitsize */
595 false, /* pc_relative */
596 0, /* bitpos */
597 complain_overflow_bitfield, /* complain_on_overflow */
598 bfd_elf_generic_reloc, /* special_function */
599 "R_PPC_PLT32", /* name */
600 false, /* partial_inplace */
601 0, /* src_mask */
602 0, /* dst_mask */
603 false), /* pcrel_offset */
604
605 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
c3668558 606 FIXME: not supported. */
252b5132
RH		 607 HOWTO (R_PPC_PLTREL32, /* type */
608 0, /* rightshift */
609 2, /* size (0 = byte, 1 = short, 2 = long) */
610 32, /* bitsize */
611 true, /* pc_relative */
612 0, /* bitpos */
613 complain_overflow_bitfield, /* complain_on_overflow */
614 bfd_elf_generic_reloc, /* special_function */
615 "R_PPC_PLTREL32", /* name */
616 false, /* partial_inplace */
617 0, /* src_mask */
618 0, /* dst_mask */
619 true), /* pcrel_offset */
620
621 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
622 the symbol. */
623 HOWTO (R_PPC_PLT16_LO, /* type */
624 0, /* rightshift */
625 1, /* size (0 = byte, 1 = short, 2 = long) */
626 16, /* bitsize */
627 false, /* pc_relative */
628 0, /* bitpos */
629 complain_overflow_dont, /* complain_on_overflow */
630 bfd_elf_generic_reloc, /* special_function */
631 "R_PPC_PLT16_LO", /* name */
632 false, /* partial_inplace */
633 0, /* src_mask */
634 0xffff, /* dst_mask */
635 false), /* pcrel_offset */
636
637 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
638 the symbol. */
639 HOWTO (R_PPC_PLT16_HI, /* type */
640 16, /* rightshift */
641 1, /* size (0 = byte, 1 = short, 2 = long) */
642 16, /* bitsize */
643 false, /* pc_relative */
644 0, /* bitpos */
645 complain_overflow_bitfield, /* complain_on_overflow */
646 bfd_elf_generic_reloc, /* special_function */
647 "R_PPC_PLT16_HI", /* name */
648 false, /* partial_inplace */
649 0, /* src_mask */
650 0xffff, /* dst_mask */
651 false), /* pcrel_offset */
652
653 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
654 the symbol. */
655 HOWTO (R_PPC_PLT16_HA, /* type */
656 16, /* rightshift */
657 1, /* size (0 = byte, 1 = short, 2 = long) */
658 16, /* bitsize */
659 false, /* pc_relative */
660 0, /* bitpos */
661 complain_overflow_bitfield, /* complain_on_overflow */
662 ppc_elf_addr16_ha_reloc, /* special_function */
663 "R_PPC_PLT16_HA", /* name */
664 false, /* partial_inplace */
665 0, /* src_mask */
666 0xffff, /* dst_mask */
667 false), /* pcrel_offset */
668
669 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
670 small data items. */
671 HOWTO (R_PPC_SDAREL16, /* type */
672 0, /* rightshift */
673 1, /* size (0 = byte, 1 = short, 2 = long) */
674 16, /* bitsize */
675 false, /* pc_relative */
676 0, /* bitpos */
677 complain_overflow_signed, /* complain_on_overflow */
678 bfd_elf_generic_reloc, /* special_function */
679 "R_PPC_SDAREL16", /* name */
680 false, /* partial_inplace */
681 0, /* src_mask */
682 0xffff, /* dst_mask */
683 false), /* pcrel_offset */
684
c061c2d8 685 /* 16-bit section relative relocation. */
252b5132
RH		 686 HOWTO (R_PPC_SECTOFF, /* type */
687 0, /* rightshift */
c061c2d8
AM		 688 1, /* size (0 = byte, 1 = short, 2 = long) */
689 16, /* bitsize */
690 false, /* pc_relative */
252b5132
RH		 691 0, /* bitpos */
692 complain_overflow_bitfield, /* complain_on_overflow */
693 bfd_elf_generic_reloc, /* special_function */
694 "R_PPC_SECTOFF", /* name */
695 false, /* partial_inplace */
696 0, /* src_mask */
c061c2d8
AM		 697 0xffff, /* dst_mask */
698 false), /* pcrel_offset */
252b5132 699
c3668558 700 /* 16-bit lower half section relative relocation. */
252b5132
RH		 701 HOWTO (R_PPC_SECTOFF_LO, /* type */
702 0, /* rightshift */
703 1, /* size (0 = byte, 1 = short, 2 = long) */
704 16, /* bitsize */
705 false, /* pc_relative */
706 0, /* bitpos */
707 complain_overflow_dont, /* complain_on_overflow */
708 bfd_elf_generic_reloc, /* special_function */
709 "R_PPC_SECTOFF_LO", /* name */
710 false, /* partial_inplace */
711 0, /* src_mask */
712 0xffff, /* dst_mask */
713 false), /* pcrel_offset */
714
c3668558 715 /* 16-bit upper half section relative relocation. */
252b5132
RH		 716 HOWTO (R_PPC_SECTOFF_HI, /* type */
717 16, /* rightshift */
718 1, /* size (0 = byte, 1 = short, 2 = long) */
719 16, /* bitsize */
720 false, /* pc_relative */
721 0, /* bitpos */
722 complain_overflow_bitfield, /* complain_on_overflow */
723 bfd_elf_generic_reloc, /* special_function */
724 "R_PPC_SECTOFF_HI", /* name */
725 false, /* partial_inplace */
726 0, /* src_mask */
727 0xffff, /* dst_mask */
728 false), /* pcrel_offset */
729
c3668558 730 /* 16-bit upper half adjusted section relative relocation. */
252b5132
RH		 731 HOWTO (R_PPC_SECTOFF_HA, /* type */
732 16, /* rightshift */
733 1, /* size (0 = byte, 1 = short, 2 = long) */
734 16, /* bitsize */
735 false, /* pc_relative */
736 0, /* bitpos */
737 complain_overflow_bitfield, /* complain_on_overflow */
738 ppc_elf_addr16_ha_reloc, /* special_function */
739 "R_PPC_SECTOFF_HA", /* name */
740 false, /* partial_inplace */
741 0, /* src_mask */
742 0xffff, /* dst_mask */
743 false), /* pcrel_offset */
744
745 /* The remaining relocs are from the Embedded ELF ABI, and are not
746 in the SVR4 ELF ABI. */
747
748 /* 32 bit value resulting from the addend minus the symbol */
749 HOWTO (R_PPC_EMB_NADDR32, /* type */
750 0, /* rightshift */
751 2, /* size (0 = byte, 1 = short, 2 = long) */
752 32, /* bitsize */
753 false, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_bitfield, /* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_PPC_EMB_NADDR32", /* name */
758 false, /* partial_inplace */
759 0, /* src_mask */
760 0xffffffff, /* dst_mask */
761 false), /* pcrel_offset */
762
763 /* 16 bit value resulting from the addend minus the symbol */
764 HOWTO (R_PPC_EMB_NADDR16, /* type */
765 0, /* rightshift */
766 1, /* size (0 = byte, 1 = short, 2 = long) */
767 16, /* bitsize */
768 false, /* pc_relative */
769 0, /* bitpos */
770 complain_overflow_bitfield, /* complain_on_overflow */
771 bfd_elf_generic_reloc, /* special_function */
772 "R_PPC_EMB_NADDR16", /* name */
773 false, /* partial_inplace */
774 0, /* src_mask */
775 0xffff, /* dst_mask */
776 false), /* pcrel_offset */
777
778 /* 16 bit value resulting from the addend minus the symbol */
779 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
780 0, /* rightshift */
781 1, /* size (0 = byte, 1 = short, 2 = long) */
782 16, /* bitsize */
783 false, /* pc_relative */
784 0, /* bitpos */
785 complain_overflow_dont,/* complain_on_overflow */
786 bfd_elf_generic_reloc, /* special_function */
787 "R_PPC_EMB_ADDR16_LO", /* name */
788 false, /* partial_inplace */
789 0, /* src_mask */
790 0xffff, /* dst_mask */
791 false), /* pcrel_offset */
792
793 /* The high order 16 bits of the addend minus the symbol */
794 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
795 16, /* rightshift */
796 1, /* size (0 = byte, 1 = short, 2 = long) */
797 16, /* bitsize */
798 false, /* pc_relative */
799 0, /* bitpos */
800 complain_overflow_dont, /* complain_on_overflow */
801 bfd_elf_generic_reloc, /* special_function */
802 "R_PPC_EMB_NADDR16_HI", /* name */
803 false, /* partial_inplace */
804 0, /* src_mask */
805 0xffff, /* dst_mask */
806 false), /* pcrel_offset */
807
808 /* The high order 16 bits of the result of the addend minus the address,
809 plus 1 if the contents of the low 16 bits, treated as a signed number,
810 is negative. */
811 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
812 16, /* rightshift */
813 1, /* size (0 = byte, 1 = short, 2 = long) */
814 16, /* bitsize */
815 false, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 ppc_elf_addr16_ha_reloc, /* special_function */
819 "R_PPC_EMB_NADDR16_HA", /* name */
820 false, /* partial_inplace */
821 0, /* src_mask */
822 0xffff, /* dst_mask */
823 false), /* pcrel_offset */
824
825 /* 16 bit value resulting from allocating a 4 byte word to hold an
826 address in the .sdata section, and returning the offset from
827 _SDA_BASE_ for that relocation */
828 HOWTO (R_PPC_EMB_SDAI16, /* type */
829 0, /* rightshift */
830 1, /* size (0 = byte, 1 = short, 2 = long) */
831 16, /* bitsize */
832 false, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_bitfield, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC_EMB_SDAI16", /* name */
837 false, /* partial_inplace */
838 0, /* src_mask */
839 0xffff, /* dst_mask */
840 false), /* pcrel_offset */
841
842 /* 16 bit value resulting from allocating a 4 byte word to hold an
843 address in the .sdata2 section, and returning the offset from
844 _SDA2_BASE_ for that relocation */
845 HOWTO (R_PPC_EMB_SDA2I16, /* type */
846 0, /* rightshift */
847 1, /* size (0 = byte, 1 = short, 2 = long) */
848 16, /* bitsize */
849 false, /* pc_relative */
850 0, /* bitpos */
851 complain_overflow_bitfield, /* complain_on_overflow */
852 bfd_elf_generic_reloc, /* special_function */
853 "R_PPC_EMB_SDA2I16", /* name */
854 false, /* partial_inplace */
855 0, /* src_mask */
856 0xffff, /* dst_mask */
857 false), /* pcrel_offset */
858
859 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
860 small data items. */
861 HOWTO (R_PPC_EMB_SDA2REL, /* type */
862 0, /* rightshift */
863 1, /* size (0 = byte, 1 = short, 2 = long) */
864 16, /* bitsize */
865 false, /* pc_relative */
866 0, /* bitpos */
867 complain_overflow_signed, /* complain_on_overflow */
868 bfd_elf_generic_reloc, /* special_function */
869 "R_PPC_EMB_SDA2REL", /* name */
870 false, /* partial_inplace */
871 0, /* src_mask */
872 0xffff, /* dst_mask */
873 false), /* pcrel_offset */
874
875 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
876 signed offset from the appropriate base, and filling in the register
877 field with the appropriate register (0, 2, or 13). */
878 HOWTO (R_PPC_EMB_SDA21, /* type */
879 0, /* rightshift */
880 2, /* size (0 = byte, 1 = short, 2 = long) */
881 16, /* bitsize */
882 false, /* pc_relative */
883 0, /* bitpos */
884 complain_overflow_signed, /* complain_on_overflow */
885 bfd_elf_generic_reloc, /* special_function */
886 "R_PPC_EMB_SDA21", /* name */
887 false, /* partial_inplace */
888 0, /* src_mask */
889 0xffff, /* dst_mask */
890 false), /* pcrel_offset */
891
892 /* Relocation not handled: R_PPC_EMB_MRKREF */
893 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
894 /* Relocation not handled: R_PPC_EMB_RELST_LO */
895 /* Relocation not handled: R_PPC_EMB_RELST_HI */
896 /* Relocation not handled: R_PPC_EMB_RELST_HA */
897 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
898
899 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
900 in the 16 bit signed offset from the appropriate base, and filling in the
901 register field with the appropriate register (0, 2, or 13). */
902 HOWTO (R_PPC_EMB_RELSDA, /* type */
903 0, /* rightshift */
904 1, /* size (0 = byte, 1 = short, 2 = long) */
905 16, /* bitsize */
906 true, /* pc_relative */
907 0, /* bitpos */
908 complain_overflow_signed, /* complain_on_overflow */
909 bfd_elf_generic_reloc, /* special_function */
910 "R_PPC_EMB_RELSDA", /* name */
911 false, /* partial_inplace */
912 0, /* src_mask */
913 0xffff, /* dst_mask */
914 false), /* pcrel_offset */
915
916 /* GNU extension to record C++ vtable hierarchy */
917 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
918 0, /* rightshift */
919 0, /* size (0 = byte, 1 = short, 2 = long) */
920 0, /* bitsize */
921 false, /* pc_relative */
922 0, /* bitpos */
923 complain_overflow_dont, /* complain_on_overflow */
924 NULL, /* special_function */
925 "R_PPC_GNU_VTINHERIT", /* name */
926 false, /* partial_inplace */
927 0, /* src_mask */
928 0, /* dst_mask */
929 false), /* pcrel_offset */
930
931 /* GNU extension to record C++ vtable member usage */
932 HOWTO (R_PPC_GNU_VTENTRY, /* type */
933 0, /* rightshift */
934 0, /* size (0 = byte, 1 = short, 2 = long) */
935 0, /* bitsize */
936 false, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont, /* complain_on_overflow */
939 NULL, /* special_function */
940 "R_PPC_GNU_VTENTRY", /* name */
941 false, /* partial_inplace */
942 0, /* src_mask */
943 0, /* dst_mask */
944 false), /* pcrel_offset */
945
946 /* Phony reloc to handle AIX style TOC entries */
947 HOWTO (R_PPC_TOC16, /* type */
948 0, /* rightshift */
949 1, /* size (0 = byte, 1 = short, 2 = long) */
950 16, /* bitsize */
951 false, /* pc_relative */
952 0, /* bitpos */
953 complain_overflow_signed, /* complain_on_overflow */
954 bfd_elf_generic_reloc, /* special_function */
955 "R_PPC_TOC16", /* name */
956 false, /* partial_inplace */
957 0, /* src_mask */
958 0xffff, /* dst_mask */
959 false), /* pcrel_offset */
960};
252b5132
RH		 961\f
962/* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
963
964static void
965ppc_elf_howto_init ()
966{
967 unsigned int i, type;
968
969 for (i = 0; i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); i++)
970 {
971 type = ppc_elf_howto_raw[i].type;
c3668558 972 BFD_ASSERT (type < sizeof (ppc_elf_howto_table) / sizeof (ppc_elf_howto_table[0]));
252b5132
RH		 973 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
974 }
975}
252b5132
RH		 976\f
977/* This function handles relaxing for the PPC with option --mpc860c0[=<n>].
978
979 The MPC860, revision C0 or earlier contains a bug in the die.
980 If all of the following conditions are true, the next instruction
981 to be executed *may* be treated as a no-op.
982 1/ A forward branch is executed.
983 2/ The branch is predicted as not taken.
984 3/ The branch is taken.
985 4/ The branch is located in the last 5 words of a page.
986 (The EOP limit is 5 by default but may be specified as any value from 1-10.)
c3668558 987
252b5132
RH		 988 Our software solution is to detect these problematic branches in a
989 linker pass and modify them as follows:
990 1/ Unconditional branches - Since these are always predicted taken,
991 there is no problem and no action is required.
992 2/ Conditional backward branches - No problem, no action required.
993 3/ Conditional forward branches - Ensure that the "inverse prediction
994 bit" is set (ensure it is predicted taken).
995 4/ Conditional register branches - Ensure that the "y bit" is set
996 (ensure it is predicted taken).
997*/
998
999/* Sort sections by address. */
1000
1001static int
1002ppc_elf_sort_rela (arg1, arg2)
a7b97311
AM		 1003 const PTR arg1;
1004 const PTR arg2;
252b5132
RH		 1005{
1006 const Elf_Internal_Rela **rela1 = (const Elf_Internal_Rela**) arg1;
1007 const Elf_Internal_Rela **rela2 = (const Elf_Internal_Rela**) arg2;
1008
c3668558 1009 /* Sort by offset. */
252b5132
RH		 1010 return ((*rela1)->r_offset - (*rela2)->r_offset);
1011}
1012
1013static boolean
1014ppc_elf_relax_section (abfd, isec, link_info, again)
8da6118f
KH		 1015 bfd *abfd;
1016 asection *isec;
1017 struct bfd_link_info *link_info;
1018 boolean *again;
252b5132
RH		 1019{
1020#define PAGESIZE 0x1000
1021
1022 bfd_byte *contents = NULL;
1023 bfd_byte *free_contents = NULL;
1024 Elf_Internal_Rela *internal_relocs = NULL;
1025 Elf_Internal_Rela *free_relocs = NULL;
1026 Elf_Internal_Rela **rela_comb = NULL;
1027 int comb_curr, comb_count;
1028
c3668558 1029 /* We never have to do this more than once per input section. */
252b5132
RH		 1030 *again = false;
1031
1032 /* If needed, initialize this section's cooked size. */
1033 if (isec->_cooked_size == 0)
1034 isec->_cooked_size = isec->_raw_size;
1035
1036 /* We're only interested in text sections which overlap the
8da6118f 1037 troublesome area at the end of a page. */
252b5132
RH		 1038 if (link_info->mpc860c0 && (isec->flags & SEC_CODE) && isec->_cooked_size)
1039 {
1040 bfd_vma dot, end_page, end_section;
1041 boolean section_modified;
1042
c3668558 1043 /* Get the section contents. */
252b5132
RH		 1044 /* Get cached copy if it exists. */
1045 if (elf_section_data (isec)->this_hdr.contents != NULL)
1046 contents = elf_section_data (isec)->this_hdr.contents;
1047 else
1048 {
1049 /* Go get them off disk. */
1050 contents = (bfd_byte *) bfd_malloc (isec->_raw_size);
1051 if (contents == NULL)
8da6118f 1052 goto error_return;
252b5132
RH		 1053 free_contents = contents;
1054
1055 if (! bfd_get_section_contents (abfd, isec, contents,
1056 (file_ptr) 0, isec->_raw_size))
8da6118f 1057 goto error_return;
252b5132
RH		 1058 }
1059
1060 comb_curr = 0;
1061 comb_count = 0;
1062 if (isec->reloc_count)
8da6118f 1063 {
252b5132 1064 unsigned n;
dc810e39 1065 bfd_size_type amt;
252b5132
RH		 1066
1067 /* Get a copy of the native relocations. */
1068 internal_relocs = _bfd_elf32_link_read_relocs (
c3668558 1069 abfd, isec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
252b5132
RH		 1070 link_info->keep_memory);
1071 if (internal_relocs == NULL)
1072 goto error_return;
1073 if (! link_info->keep_memory)
1074 free_relocs = internal_relocs;
c3668558
KH		 1075
1076 /* Setup a faster access method for the reloc info we need. */
dc810e39
AM		 1077 amt = isec->reloc_count;
1078 amt *= sizeof (Elf_Internal_Rela*);
1079 rela_comb = (Elf_Internal_Rela**) bfd_malloc (amt);
252b5132
RH		 1080 if (rela_comb == NULL)
1081 goto error_return;
8da6118f 1082 for (n = 0; n < isec->reloc_count; ++n)
252b5132
RH		 1083 {
1084 long r_type;
c3668558 1085
252b5132 1086 r_type = ELF32_R_TYPE (internal_relocs[n].r_info);
8da6118f 1087 if (r_type < 0 || r_type >= (int) R_PPC_max)
252b5132 1088 goto error_return;
c3668558 1089
252b5132
RH		 1090 /* Prologue constants are sometimes present in the ".text"
1091 sections and they can be identified by their associated relocation.
1092 We don't want to process those words and some others which
1093 can also be identified by their relocations. However, not all
1094 conditional branches will have a relocation so we will
1095 only ignore words that 1) have a reloc, and 2) the reloc
1096 is not applicable to a conditional branch.
c3668558 1097 The array rela_comb is built here for use in the EOP scan loop. */
252b5132
RH		 1098 switch (r_type)
1099 {
1100 case R_PPC_ADDR14_BRNTAKEN: /* absolute, predicted not taken */
c3668558 1101 case R_PPC_REL14: /* relative cond. br. */
252b5132 1102 case R_PPC_REL14_BRNTAKEN: /* rel. cond. br., predicted not taken */
c3668558 1103 /* We should check the instruction. */
252b5132
RH		 1104 break;
1105 default:
c3668558 1106 /* The word is not a conditional branch - ignore it. */
252b5132
RH		 1107 rela_comb[comb_count++] = &internal_relocs[n];
1108 break;
1109 }
1110 }
1111 if (comb_count > 1)
8da6118f
KH		 1112 qsort (rela_comb, (size_t) comb_count, sizeof (int), ppc_elf_sort_rela);
1113 }
252b5132 1114
c3668558 1115 /* Enumerate each EOP region that overlaps this section. */
252b5132
RH		 1116 end_section = isec->vma + isec->_cooked_size;
1117 dot = end_page = (isec->vma | (PAGESIZE - 1)) + 1;
1118 dot -= link_info->mpc860c0;
1119 section_modified = false;
1120 if (dot < isec->vma) /* Increment the start position if this section */
c3668558 1121 dot = isec->vma; /* begins in the middle of its first EOP region. */
252b5132
RH		 1122 for (;
1123 dot < end_section;
1124 dot += PAGESIZE, end_page += PAGESIZE)
1125 {
1126
c3668558 1127 /* Check each word in this EOP region. */
252b5132
RH		 1128 for (; dot < end_page; dot += 4)
1129 {
1130 bfd_vma isec_offset;
1131 unsigned long insn;
1132 boolean skip, modified;
1133
1134 /* Don't process this word if there is a relocation for it and
c3668558 1135 the relocation indicates the word is not a conditional branch. */
252b5132
RH		 1136 skip = false;
1137 isec_offset = dot - isec->vma;
1138 for (; comb_curr<comb_count; ++comb_curr)
1139 {
1140 bfd_vma r_offset;
1141
1142 r_offset = rela_comb[comb_curr]->r_offset;
1143 if (r_offset >= isec_offset)
1144 {
1145 if (r_offset == isec_offset) skip = true;
1146 break;
1147 }
1148 }
1149 if (skip) continue;
1150
c3668558 1151 /* Check the current word for a problematic conditional branch. */
252b5132
RH		 1152#define BO0(insn) ((insn) & 0x02000000)
1153#define BO2(insn) ((insn) & 0x00800000)
1154#define BO4(insn) ((insn) & 0x00200000)
1155 insn = (unsigned long) bfd_get_32 (abfd, contents + isec_offset);
1156 modified = false;
1157 if ((insn & 0xFc000000) == 0x40000000)
1158 {
1159 /* Instruction is BCx */
1160 if ((!BO0(insn) || !BO2(insn)) && !BO4(insn))
1161 {
1162 bfd_vma target;
1163 /* This branch is predicted as "normal".
c3668558 1164 If this is a forward branch, it is problematic. */
252b5132
RH		 1165
1166 target = insn & 0x0000Fffc; /*extract*/
1167 target = (target ^ 0x8000) - 0x8000; /*sign extend*/
1168 if ((insn & 0x00000002) == 0)
1169 target += dot; /*convert to abs*/
1170 if (target > dot)
1171 {
1172 insn |= 0x00200000; /* set the prediction bit */
1173 modified = true;
1174 }
1175 }
1176 }
1177 else if ((insn & 0xFc00Fffe) == 0x4c000420)
1178 {
1179 /* Instruction is BCCTRx */
1180 if ((!BO0(insn) || !BO2(insn)) && !BO4(insn))
1181 {
1182 /* This branch is predicted as not-taken.
1183 If this is a forward branch, it is problematic.
1184 Since we can't tell statically if it will branch forward,
c3668558 1185 always set the prediction bit. */
252b5132
RH		 1186 insn |= 0x00200000; /* set the prediction bit */
1187 modified = true;
1188 }
1189 }
1190 else if ((insn & 0xFc00Fffe) == 0x4c000020)
1191 {
1192 /* Instruction is BCLRx */
1193 if ((!BO0(insn) || !BO2(insn)) && !BO4(insn))
1194 {
1195 /* This branch is predicted as not-taken.
1196 If this is a forward branch, it is problematic.
1197 Since we can't tell statically if it will branch forward,
c3668558 1198 always set the prediction bit. */
252b5132
RH		 1199 insn |= 0x00200000; /* set the prediction bit */
1200 modified = true;
1201 }
1202 }
1203#undef BO0
1204#undef BO2
1205#undef BO4
1206 if (modified)
1207 {
dc810e39 1208 bfd_put_32 (abfd, (bfd_vma) insn, contents + isec_offset);
252b5132
RH		 1209 section_modified = true;
1210 }
1211 }
1212 }
1213 if (section_modified)
1214 {
1215 elf_section_data (isec)->this_hdr.contents = contents;
1216 free_contents = NULL;
1217 }
1218 }
1219
1220 if (rela_comb != NULL)
1221 {
1222 free (rela_comb);
1223 rela_comb = NULL;
1224 }
1225
1226 if (free_relocs != NULL)
1227 {
1228 free (free_relocs);
1229 free_relocs = NULL;
1230 }
1231
1232 if (free_contents != NULL)
1233 {
1234 if (! link_info->keep_memory)
1235 free (free_contents);
1236 else
1237 {
1238 /* Cache the section contents for elf_link_input_bfd. */
1239 elf_section_data (isec)->this_hdr.contents = contents;
1240 }
1241 free_contents = NULL;
1242 }
1243
1244 return true;
1245
1246error_return:
1247 if (rela_comb != NULL)
1248 free (rela_comb);
1249 if (free_relocs != NULL)
1250 free (free_relocs);
1251 if (free_contents != NULL)
1252 free (free_contents);
1253 return false;
1254}
252b5132
RH		 1255\f
1256static reloc_howto_type *
1257ppc_elf_reloc_type_lookup (abfd, code)
5f771d47 1258 bfd *abfd ATTRIBUTE_UNUSED;
252b5132
RH		 1259 bfd_reloc_code_real_type code;
1260{
1261 enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE;
1262
1263 if (!ppc_elf_howto_table[R_PPC_ADDR32])
8da6118f 1264 /* Initialize howto table if needed. */
252b5132
RH		 1265 ppc_elf_howto_init ();
1266
8da6118f 1267 switch ((int) code)
252b5132
RH		 1268 {
1269 default:
8da6118f 1270 return (reloc_howto_type *) NULL;
252b5132
RH		 1271
1272 case BFD_RELOC_NONE: ppc_reloc = R_PPC_NONE; break;
1273 case BFD_RELOC_32: ppc_reloc = R_PPC_ADDR32; break;
1274 case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC_ADDR24; break;
1275 case BFD_RELOC_16: ppc_reloc = R_PPC_ADDR16; break;
1276 case BFD_RELOC_LO16: ppc_reloc = R_PPC_ADDR16_LO; break;
1277 case BFD_RELOC_HI16: ppc_reloc = R_PPC_ADDR16_HI; break;
1278 case BFD_RELOC_HI16_S: ppc_reloc = R_PPC_ADDR16_HA; break;
1279 case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC_ADDR14; break;
1280 case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC_ADDR14_BRTAKEN; break;
1281 case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC_ADDR14_BRNTAKEN; break;
1282 case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC_REL24; break;
1283 case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC_REL14; break;
1284 case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC_REL14_BRTAKEN; break;
1285 case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC_REL14_BRNTAKEN; break;
1286 case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC_GOT16; break;
1287 case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC_GOT16_LO; break;
1288 case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC_GOT16_HI; break;
1289 case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC_GOT16_HA; break;
1290 case BFD_RELOC_24_PLT_PCREL: ppc_reloc = R_PPC_PLTREL24; break;
1291 case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC_COPY; break;
1292 case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC_GLOB_DAT; break;
1293 case BFD_RELOC_PPC_LOCAL24PC: ppc_reloc = R_PPC_LOCAL24PC; break;
1294 case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC_REL32; break;
1295 case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC_PLT32; break;
1296 case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC_PLTREL32; break;
1297 case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC_PLT16_LO; break;
1298 case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC_PLT16_HI; break;
1299 case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC_PLT16_HA; break;
1300 case BFD_RELOC_GPREL16: ppc_reloc = R_PPC_SDAREL16; break;
c061c2d8 1301 case BFD_RELOC_16_BASEREL: ppc_reloc = R_PPC_SECTOFF; break;
252b5132
RH		 1302 case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC_SECTOFF_LO; break;
1303 case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC_SECTOFF_HI; break;
1304 case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC_SECTOFF_HA; break;
1305 case BFD_RELOC_CTOR: ppc_reloc = R_PPC_ADDR32; break;
1306 case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC_TOC16; break;
1307 case BFD_RELOC_PPC_EMB_NADDR32: ppc_reloc = R_PPC_EMB_NADDR32; break;
1308 case BFD_RELOC_PPC_EMB_NADDR16: ppc_reloc = R_PPC_EMB_NADDR16; break;
1309 case BFD_RELOC_PPC_EMB_NADDR16_LO: ppc_reloc = R_PPC_EMB_NADDR16_LO; break;
1310 case BFD_RELOC_PPC_EMB_NADDR16_HI: ppc_reloc = R_PPC_EMB_NADDR16_HI; break;
1311 case BFD_RELOC_PPC_EMB_NADDR16_HA: ppc_reloc = R_PPC_EMB_NADDR16_HA; break;
1312 case BFD_RELOC_PPC_EMB_SDAI16: ppc_reloc = R_PPC_EMB_SDAI16; break;
1313 case BFD_RELOC_PPC_EMB_SDA2I16: ppc_reloc = R_PPC_EMB_SDA2I16; break;
1314 case BFD_RELOC_PPC_EMB_SDA2REL: ppc_reloc = R_PPC_EMB_SDA2REL; break;
1315 case BFD_RELOC_PPC_EMB_SDA21: ppc_reloc = R_PPC_EMB_SDA21; break;
1316 case BFD_RELOC_PPC_EMB_MRKREF: ppc_reloc = R_PPC_EMB_MRKREF; break;
1317 case BFD_RELOC_PPC_EMB_RELSEC16: ppc_reloc = R_PPC_EMB_RELSEC16; break;
1318 case BFD_RELOC_PPC_EMB_RELST_LO: ppc_reloc = R_PPC_EMB_RELST_LO; break;
1319 case BFD_RELOC_PPC_EMB_RELST_HI: ppc_reloc = R_PPC_EMB_RELST_HI; break;
1320 case BFD_RELOC_PPC_EMB_RELST_HA: ppc_reloc = R_PPC_EMB_RELST_HA; break;
1321 case BFD_RELOC_PPC_EMB_BIT_FLD: ppc_reloc = R_PPC_EMB_BIT_FLD; break;
1322 case BFD_RELOC_PPC_EMB_RELSDA: ppc_reloc = R_PPC_EMB_RELSDA; break;
1323 case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC_GNU_VTINHERIT; break;
1324 case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC_GNU_VTENTRY; break;
1325 }
1326
8da6118f 1327 return ppc_elf_howto_table[(int) ppc_reloc];
252b5132
RH		 1328};
1329
1330/* Set the howto pointer for a PowerPC ELF reloc. */
1331
1332static void
1333ppc_elf_info_to_howto (abfd, cache_ptr, dst)
5f771d47 1334 bfd *abfd ATTRIBUTE_UNUSED;
252b5132 1335 arelent *cache_ptr;
947216bf 1336 Elf_Internal_Rela *dst;
252b5132 1337{
8da6118f
KH		 1338 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1339 /* Initialize howto table if needed. */
252b5132
RH		 1340 ppc_elf_howto_init ();
1341
1342 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1343 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1344}
1345
1346/* Handle the R_PPC_ADDR16_HA reloc. */
1347
1348static bfd_reloc_status_type
1349ppc_elf_addr16_ha_reloc (abfd, reloc_entry, symbol, data, input_section,
1350 output_bfd, error_message)
5f771d47 1351 bfd *abfd ATTRIBUTE_UNUSED;
252b5132
RH		 1352 arelent *reloc_entry;
1353 asymbol *symbol;
5f771d47 1354 PTR data ATTRIBUTE_UNUSED;
252b5132
RH		 1355 asection *input_section;
1356 bfd *output_bfd;
5f771d47 1357 char **error_message ATTRIBUTE_UNUSED;
252b5132
RH		 1358{
1359 bfd_vma relocation;
1360
1361 if (output_bfd != NULL)
1362 {
1363 reloc_entry->address += input_section->output_offset;
1364 return bfd_reloc_ok;
1365 }
1366
1367 if (reloc_entry->address > input_section->_cooked_size)
1368 return bfd_reloc_outofrange;
1369
1370 if (bfd_is_com_section (symbol->section))
1371 relocation = 0;
1372 else
1373 relocation = symbol->value;
1374
1375 relocation += symbol->section->output_section->vma;
1376 relocation += symbol->section->output_offset;
1377 relocation += reloc_entry->addend;
1378
1379 reloc_entry->addend += (relocation & 0x8000) << 1;
1380
1381 return bfd_reloc_continue;
1382}
1383
feee612b
AM		 1384/* Fix bad default arch selected for a 32 bit input bfd when the
1385 default is 64 bit. */
1386
1387static boolean
1388ppc_elf_object_p (abfd)
1389 bfd *abfd;
1390{
1391 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1392 {
1393 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1394
1395 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1396 {
1397 /* Relies on arch after 64 bit default being 32 bit default. */
1398 abfd->arch_info = abfd->arch_info->next;
1399 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1400 }
1401 }
1402 return true;
1403}
1404
c3668558 1405/* Function to set whether a module needs the -mrelocatable bit set. */
252b5132
RH		 1406
1407static boolean
1408ppc_elf_set_private_flags (abfd, flags)
1409 bfd *abfd;
1410 flagword flags;
1411{
1412 BFD_ASSERT (!elf_flags_init (abfd)
1413 || elf_elfheader (abfd)->e_flags == flags);
1414
1415 elf_elfheader (abfd)->e_flags = flags;
1416 elf_flags_init (abfd) = true;
1417 return true;
1418}
1419
252b5132
RH		 1420/* Merge backend specific data from an object file to the output
1421 object file when linking */
1422static boolean
1423ppc_elf_merge_private_bfd_data (ibfd, obfd)
1424 bfd *ibfd;
1425 bfd *obfd;
1426{
1427 flagword old_flags;
1428 flagword new_flags;
1429 boolean error;
1430
1431 /* Check if we have the same endianess */
82e51918 1432 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
1fe494a5 1433 return false;
252b5132
RH		 1434
1435 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1436 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1437 return true;
1438
1439 new_flags = elf_elfheader (ibfd)->e_flags;
1440 old_flags = elf_elfheader (obfd)->e_flags;
1441 if (!elf_flags_init (obfd)) /* First call, no flags set */
1442 {
1443 elf_flags_init (obfd) = true;
1444 elf_elfheader (obfd)->e_flags = new_flags;
1445 }
1446
1447 else if (new_flags == old_flags) /* Compatible flags are ok */
1448 ;
1449
1450 else /* Incompatible flags */
1451 {
1452 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib to be linked
1453 with either. */
1454 error = false;
1455 if ((new_flags & EF_PPC_RELOCATABLE) != 0
1456 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
1457 {
1458 error = true;
1459 (*_bfd_error_handler)
1460 (_("%s: compiled with -mrelocatable and linked with modules compiled normally"),
8f615d07 1461 bfd_archive_filename (ibfd));
252b5132
RH		 1462 }
1463 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
1464 && (old_flags & EF_PPC_RELOCATABLE) != 0)
1465 {
1466 error = true;
1467 (*_bfd_error_handler)
1468 (_("%s: compiled normally and linked with modules compiled with -mrelocatable"),
8f615d07 1469 bfd_archive_filename (ibfd));
252b5132
RH		 1470 }
1471
1472 /* The output is -mrelocatable-lib iff both the input files are. */
1473 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
1474 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
1475
1476 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
1477 but each input file is either -mrelocatable or -mrelocatable-lib. */
1478 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
1479 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
1480 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
1481 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
1482
1483 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if any module uses it */
1484 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
1485
1486 new_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
1487 old_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
1488
1489 /* Warn about any other mismatches */
1490 if (new_flags != old_flags)
1491 {
1492 error = true;
1493 (*_bfd_error_handler)
1494 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
8f615d07 1495 bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
252b5132
RH		 1496 }
1497
1498 if (error)
1499 {
1500 bfd_set_error (bfd_error_bad_value);
1501 return false;
1502 }
1503 }
1504
1505 return true;
1506}
252b5132
RH		 1507\f
1508/* Handle a PowerPC specific section when reading an object file. This
1509 is called when elfcode.h finds a section with an unknown type. */
1510
1511static boolean
1512ppc_elf_section_from_shdr (abfd, hdr, name)
1513 bfd *abfd;
947216bf 1514 Elf_Internal_Shdr *hdr;
90937f86 1515 const char *name;
252b5132
RH		 1516{
1517 asection *newsect;
1518 flagword flags;
1519
1520 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1521 return false;
1522
1523 newsect = hdr->bfd_section;
1524 flags = bfd_get_section_flags (abfd, newsect);
1525 if (hdr->sh_flags & SHF_EXCLUDE)
1526 flags |= SEC_EXCLUDE;
1527
1528 if (hdr->sh_type == SHT_ORDERED)
1529 flags |= SEC_SORT_ENTRIES;
1530
1531 bfd_set_section_flags (abfd, newsect, flags);
1532 return true;
1533}
252b5132
RH		 1534\f
1535/* Set up any other section flags and such that may be necessary. */
1536
1537static boolean
1538ppc_elf_fake_sections (abfd, shdr, asect)
5f771d47 1539 bfd *abfd ATTRIBUTE_UNUSED;
947216bf 1540 Elf_Internal_Shdr *shdr;
252b5132
RH		 1541 asection *asect;
1542{
1543 if ((asect->flags & SEC_EXCLUDE) != 0)
1544 shdr->sh_flags |= SHF_EXCLUDE;
1545
1546 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1547 shdr->sh_type = SHT_ORDERED;
1548
1549 return true;
1550}
252b5132
RH		 1551\f
1552/* Create a special linker section */
1553static elf_linker_section_t *
1554ppc_elf_create_linker_section (abfd, info, which)
1555 bfd *abfd;
1556 struct bfd_link_info *info;
1557 enum elf_linker_section_enum which;
1558{
1559 bfd *dynobj = elf_hash_table (info)->dynobj;
1560 elf_linker_section_t *lsect;
1561
1562 /* Record the first bfd section that needs the special section */
1563 if (!dynobj)
1564 dynobj = elf_hash_table (info)->dynobj = abfd;
1565
1566 /* If this is the first time, create the section */
1567 lsect = elf_linker_section (dynobj, which);
1568 if (!lsect)
1569 {
1570 elf_linker_section_t defaults;
1571 static elf_linker_section_t zero_section;
1572
1573 defaults = zero_section;
1574 defaults.which = which;
1575 defaults.hole_written_p = false;
1576 defaults.alignment = 2;
1577
1578 /* Both of these sections are (technically) created by the user
1579 putting data in them, so they shouldn't be marked
1580 SEC_LINKER_CREATED.
1581
1582 The linker creates them so it has somewhere to attach their
1583 respective symbols. In fact, if they were empty it would
1584 be OK to leave the symbol set to 0 (or any random number), because
1585 the appropriate register should never be used. */
1586 defaults.flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1587 | SEC_IN_MEMORY);
1588
1589 switch (which)
1590 {
1591 default:
1592 (*_bfd_error_handler) (_("%s: Unknown special linker type %d"),
1593 bfd_get_filename (abfd),
8da6118f 1594 (int) which);
252b5132
RH		 1595
1596 bfd_set_error (bfd_error_bad_value);
8da6118f 1597 return (elf_linker_section_t *) 0;
252b5132
RH		 1598
1599 case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
1600 defaults.name = ".sdata";
1601 defaults.rel_name = ".rela.sdata";
1602 defaults.bss_name = ".sbss";
1603 defaults.sym_name = "_SDA_BASE_";
1604 defaults.sym_offset = 32768;
1605 break;
1606
1607 case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
1608 defaults.name = ".sdata2";
1609 defaults.rel_name = ".rela.sdata2";
1610 defaults.bss_name = ".sbss2";
1611 defaults.sym_name = "_SDA2_BASE_";
1612 defaults.sym_offset = 32768;
1613 defaults.flags |= SEC_READONLY;
1614 break;
1615 }
1616
1617 lsect = _bfd_elf_create_linker_section (abfd, info, which, &defaults);
1618 }
1619
1620 return lsect;
1621}
252b5132 1622\f
8da6118f
KH		 1623/* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
1624 need to bump up the number of section headers. */
252b5132
RH		 1625
1626static int
1627ppc_elf_additional_program_headers (abfd)
1628 bfd *abfd;
1629{
1630 asection *s;
1631 int ret;
1632
1633 ret = 0;
1634
1635 s = bfd_get_section_by_name (abfd, ".interp");
1636 if (s != NULL)
1637 ++ret;
1638
1639 s = bfd_get_section_by_name (abfd, ".sbss2");
1640 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
1641 ++ret;
1642
1643 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1644 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
1645 ++ret;
1646
1647 return ret;
1648}
1649
8da6118f 1650/* Modify the segment map if needed. */
252b5132
RH		 1651
1652static boolean
1653ppc_elf_modify_segment_map (abfd)
5f771d47 1654 bfd *abfd ATTRIBUTE_UNUSED;
252b5132
RH		 1655{
1656 return true;
1657}
1658\f
41fcb14e
AM		 1659/* The powerpc .got has a blrl instruction in it. Mark it executable. */
1660
1661static asection *
1662ppc_elf_create_got (abfd, info)
1663 bfd *abfd;
1664 struct bfd_link_info *info;
1665{
1666 register asection *s;
1667 flagword flags;
1668
1669 if (!_bfd_elf_create_got_section (abfd, info))
1670 return NULL;
1671
1672 s = bfd_get_section_by_name (abfd, ".got");
1673 if (s == NULL)
1674 abort ();
1675
1676 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1677 | SEC_LINKER_CREATED);
1678 if (!bfd_set_section_flags (abfd, s, flags))
1679 return NULL;
1680 return s;
1681}
1682
252b5132
RH		 1683/* We have to create .dynsbss and .rela.sbss here so that they get mapped
1684 to output sections (just like _bfd_elf_create_dynamic_sections has
1685 to create .dynbss and .rela.bss). */
1686
1687static boolean
1688ppc_elf_create_dynamic_sections (abfd, info)
1689 bfd *abfd;
1690 struct bfd_link_info *info;
1691{
1692 register asection *s;
1693 flagword flags;
1694
41fcb14e
AM		 1695 if (!ppc_elf_create_got (abfd, info))
1696 return false;
1697
8da6118f 1698 if (!_bfd_elf_create_dynamic_sections (abfd, info))
252b5132
RH		 1699 return false;
1700
1701 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1702 | SEC_LINKER_CREATED);
1703
1704 s = bfd_make_section (abfd, ".dynsbss");
1705 if (s == NULL
1706 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
1707 return false;
1708
1709 if (! info->shared)
1710 {
1711 s = bfd_make_section (abfd, ".rela.sbss");
1712 if (s == NULL
1713 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
1714 || ! bfd_set_section_alignment (abfd, s, 2))
1715 return false;
1716 }
41fcb14e
AM		 1717
1718 s = bfd_get_section_by_name (abfd, ".plt");
1719 if (s == NULL)
1720 abort ();
1721
1722 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
1723 return bfd_set_section_flags (abfd, s, flags);
252b5132
RH		 1724}
1725
1726/* Adjust a symbol defined by a dynamic object and referenced by a
1727 regular object. The current definition is in some section of the
1728 dynamic object, but we're not including those sections. We have to
1729 change the definition to something the rest of the link can
1730 understand. */
1731
1732static boolean
1733ppc_elf_adjust_dynamic_symbol (info, h)
1734 struct bfd_link_info *info;
1735 struct elf_link_hash_entry *h;
1736{
1737 bfd *dynobj = elf_hash_table (info)->dynobj;
1738 asection *s;
1739 unsigned int power_of_two;
1740 bfd_vma plt_offset;
1741
1742#ifdef DEBUG
1743 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", h->root.root.string);
1744#endif
1745
1746 /* Make sure we know what is going on here. */
1747 BFD_ASSERT (dynobj != NULL
1748 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
1749 || h->weakdef != NULL
1750 || ((h->elf_link_hash_flags
1751 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1752 && (h->elf_link_hash_flags
1753 & ELF_LINK_HASH_REF_REGULAR) != 0
1754 && (h->elf_link_hash_flags
1755 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
1756
252b5132
RH		 1757 /* If this is a function, put it in the procedure linkage table. We
1758 will fill in the contents of the procedure linkage table later,
1759 when we know the address of the .got section. */
1760 if (h->type == STT_FUNC
1761 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1762 {
1763 if (! elf_hash_table (info)->dynamic_sections_created
e1e0340b 1764 || SYMBOL_CALLS_LOCAL (info, h)
252b5132
RH		 1765 || (info->shared && h->plt.refcount <= 0))
1766 {
1767 /* A PLT entry is not required/allowed when:
1768
1769 1. We are not using ld.so; because then the PLT entry
1770 can't be set up, so we can't use one.
1771
e1e0340b
GK		 1772 2. We know for certain that a call to this symbol
1773 will go to this object.
252b5132
RH		 1774
1775 3. GC has rendered the entry unused.
1776 Note, however, that in an executable all references to the
1777 symbol go to the PLT, so we can't turn it off in that case.
1778 ??? The correct thing to do here is to reference count
1779 all uses of the symbol, not just those to the GOT or PLT. */
1780 h->plt.offset = (bfd_vma) -1;
1781 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1782 return true;
1783 }
1784
1785 /* Make sure this symbol is output as a dynamic symbol. */
1786 if (h->dynindx == -1)
1787 {
1788 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1789 return false;
1790 }
1791 BFD_ASSERT (h->dynindx != -1);
1792
1793 s = bfd_get_section_by_name (dynobj, ".plt");
1794 BFD_ASSERT (s != NULL);
1795
1796 /* If this is the first .plt entry, make room for the special
1797 first entry. */
1798 if (s->_raw_size == 0)
1799 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
1800
1801 /* The PowerPC PLT is actually composed of two parts, the first part
1802 is 2 words (for a load and a jump), and then there is a remaining
1803 word available at the end. */
1804 plt_offset = (PLT_INITIAL_ENTRY_SIZE
1805 + (PLT_SLOT_SIZE
1806 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE)
1807 / PLT_ENTRY_SIZE)));
1808
1809 /* If this symbol is not defined in a regular file, and we are
1810 not generating a shared library, then set the symbol to this
1811 location in the .plt. This is required to make function
1812 pointers compare as equal between the normal executable and
1813 the shared library. */
1814 if (! info->shared
1815 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1816 {
1817 h->root.u.def.section = s;
1818 h->root.u.def.value = plt_offset;
1819 }
1820
1821 h->plt.offset = plt_offset;
1822
1823 /* Make room for this entry. After the 8192nd entry, room
1824 for two entries is allocated. */
1825 if ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
1826 >= PLT_NUM_SINGLE_ENTRIES)
1827 s->_raw_size += 2 * PLT_ENTRY_SIZE;
1828 else
1829 s->_raw_size += PLT_ENTRY_SIZE;
1830
1831 /* We also need to make an entry in the .rela.plt section. */
1832 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1833 BFD_ASSERT (s != NULL);
1834 s->_raw_size += sizeof (Elf32_External_Rela);
1835
1836 return true;
1837 }
bbd7ec4a
AM		 1838 else
1839 h->plt.offset = (bfd_vma) -1;
252b5132
RH		 1840
1841 /* If this is a weak symbol, and there is a real definition, the
1842 processor independent code will have arranged for us to see the
1843 real definition first, and we can just use the same value. */
1844 if (h->weakdef != NULL)
1845 {
1846 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1847 || h->weakdef->root.type == bfd_link_hash_defweak);
1848 h->root.u.def.section = h->weakdef->root.u.def.section;
1849 h->root.u.def.value = h->weakdef->root.u.def.value;
1850 return true;
1851 }
1852
1853 /* This is a reference to a symbol defined by a dynamic object which
1854 is not a function. */
1855
1856 /* If we are creating a shared library, we must presume that the
1857 only references to the symbol are via the global offset table.
1858 For such cases we need not do anything here; the relocations will
1859 be handled correctly by relocate_section. */
1860 if (info->shared)
1861 return true;
1862
1863 /* We must allocate the symbol in our .dynbss section, which will
1864 become part of the .bss section of the executable. There will be
1865 an entry for this symbol in the .dynsym section. The dynamic
1866 object will contain position independent code, so all references
1867 from the dynamic object to this symbol will go through the global
1868 offset table. The dynamic linker will use the .dynsym entry to
1869 determine the address it must put in the global offset table, so
1870 both the dynamic object and the regular object will refer to the
1871 same memory location for the variable.
1872
1873 Of course, if the symbol is sufficiently small, we must instead
1874 allocate it in .sbss. FIXME: It would be better to do this if and
1875 only if there were actually SDAREL relocs for that symbol. */
1876
1877 if (h->size <= elf_gp_size (dynobj))
1878 s = bfd_get_section_by_name (dynobj, ".dynsbss");
1879 else
1880 s = bfd_get_section_by_name (dynobj, ".dynbss");
1881 BFD_ASSERT (s != NULL);
1882
1883 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
1884 copy the initial value out of the dynamic object and into the
1885 runtime process image. We need to remember the offset into the
1886 .rela.bss section we are going to use. */
1887 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1888 {
1889 asection *srel;
1890
1891 if (h->size <= elf_gp_size (dynobj))
1892 srel = bfd_get_section_by_name (dynobj, ".rela.sbss");
1893 else
1894 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1895 BFD_ASSERT (srel != NULL);
1896 srel->_raw_size += sizeof (Elf32_External_Rela);
1897 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1898 }
1899
1900 /* We need to figure out the alignment required for this symbol. I
1901 have no idea how ELF linkers handle this. */
1902 power_of_two = bfd_log2 (h->size);
1903 if (power_of_two > 4)
1904 power_of_two = 4;
1905
1906 /* Apply the required alignment. */
1907 s->_raw_size = BFD_ALIGN (s->_raw_size,
1908 (bfd_size_type) (1 << power_of_two));
1909 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1910 {
1911 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
1912 return false;
1913 }
1914
1915 /* Define the symbol as being at this point in the section. */
1916 h->root.u.def.section = s;
1917 h->root.u.def.value = s->_raw_size;
1918
1919 /* Increment the section size to make room for the symbol. */
1920 s->_raw_size += h->size;
1921
1922 return true;
1923}
252b5132
RH		 1924\f
1925/* Set the sizes of the dynamic sections. */
1926
1927static boolean
1928ppc_elf_size_dynamic_sections (output_bfd, info)
29c2fb7c 1929 bfd *output_bfd ATTRIBUTE_UNUSED;
252b5132
RH		 1930 struct bfd_link_info *info;
1931{
1932 bfd *dynobj;
1933 asection *s;
1934 boolean plt;
1935 boolean relocs;
252b5132
RH		 1936
1937#ifdef DEBUG
1938 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
1939#endif
1940
1941 dynobj = elf_hash_table (info)->dynobj;
1942 BFD_ASSERT (dynobj != NULL);
1943
1944 if (elf_hash_table (info)->dynamic_sections_created)
1945 {
1946 /* Set the contents of the .interp section to the interpreter. */
1947 if (! info->shared)
1948 {
1949 s = bfd_get_section_by_name (dynobj, ".interp");
1950 BFD_ASSERT (s != NULL);
1951 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1952 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1953 }
1954 }
1955 else
1956 {
1957 /* We may have created entries in the .rela.got, .rela.sdata, and
1958 .rela.sdata2 sections. However, if we are not creating the
1959 dynamic sections, we will not actually use these entries. Reset
1960 the size of .rela.got, et al, which will cause it to get
1961 stripped from the output file below. */
1962 static char *rela_sections[] = { ".rela.got", ".rela.sdata",
1963 ".rela.sdata2", ".rela.sbss",
8da6118f 1964 (char *) 0 };
252b5132
RH		 1965 char **p;
1966
8da6118f 1967 for (p = rela_sections; *p != (char *) 0; p++)
252b5132
RH		 1968 {
1969 s = bfd_get_section_by_name (dynobj, *p);
1970 if (s != NULL)
1971 s->_raw_size = 0;
1972 }
1973 }
1974
1975 /* The check_relocs and adjust_dynamic_symbol entry points have
1976 determined the sizes of the various dynamic sections. Allocate
1977 memory for them. */
1978 plt = false;
1979 relocs = false;
252b5132
RH		 1980 for (s = dynobj->sections; s != NULL; s = s->next)
1981 {
1982 const char *name;
1983 boolean strip;
1984
1985 if ((s->flags & SEC_LINKER_CREATED) == 0)
1986 continue;
1987
1988 /* It's OK to base decisions on the section name, because none
1989 of the dynobj section names depend upon the input files. */
1990 name = bfd_get_section_name (dynobj, s);
1991
1992 strip = false;
1993
1994 if (strcmp (name, ".plt") == 0)
1995 {
1996 if (s->_raw_size == 0)
1997 {
1998 /* Strip this section if we don't need it; see the
1999 comment below. */
2000 strip = true;
2001 }
2002 else
2003 {
2004 /* Remember whether there is a PLT. */
2005 plt = true;
2006 }
2007 }
2008 else if (strncmp (name, ".rela", 5) == 0)
2009 {
2010 if (s->_raw_size == 0)
2011 {
2012 /* If we don't need this section, strip it from the
2013 output file. This is mostly to handle .rela.bss and
2014 .rela.plt. We must create both sections in
2015 create_dynamic_sections, because they must be created
2016 before the linker maps input sections to output
2017 sections. The linker does that before
2018 adjust_dynamic_symbol is called, and it is that
2019 function which decides whether anything needs to go
2020 into these sections. */
2021 strip = true;
2022 }
2023 else
2024 {
c3668558 2025 /* Remember whether there are any relocation sections. */
252b5132
RH		 2026 relocs = true;
2027
252b5132
RH		 2028 /* We use the reloc_count field as a counter if we need
2029 to copy relocs into the output file. */
2030 s->reloc_count = 0;
2031 }
2032 }
2033 else if (strcmp (name, ".got") != 0
2034 && strcmp (name, ".sdata") != 0
2035 && strcmp (name, ".sdata2") != 0)
2036 {
2037 /* It's not one of our sections, so don't allocate space. */
2038 continue;
2039 }
2040
2041 if (strip)
2042 {
7f8d5fc9 2043 _bfd_strip_section_from_output (info, s);
252b5132
RH		 2044 continue;
2045 }
2046
2047 /* Allocate memory for the section contents. */
2048 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
2049 if (s->contents == NULL && s->_raw_size != 0)
2050 return false;
2051 }
2052
2053 if (elf_hash_table (info)->dynamic_sections_created)
2054 {
2055 /* Add some entries to the .dynamic section. We fill in the
2056 values later, in ppc_elf_finish_dynamic_sections, but we
2057 must add the entries now so that we get the correct size for
2058 the .dynamic section. The DT_DEBUG entry is filled in by the
2059 dynamic linker and used by the debugger. */
dc810e39
AM		 2060#define add_dynamic_entry(TAG, VAL) \
2061 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
2062
2063 if (!info->shared)
252b5132 2064 {
dc810e39 2065 if (!add_dynamic_entry (DT_DEBUG, 0))
252b5132
RH		 2066 return false;
2067 }
2068
2069 if (plt)
2070 {
dc810e39
AM		 2071 if (!add_dynamic_entry (DT_PLTGOT, 0)
2072 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2073 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2074 || !add_dynamic_entry (DT_JMPREL, 0))
252b5132
RH		 2075 return false;
2076 }
2077
2078 if (relocs)
2079 {
dc810e39
AM		 2080 if (!add_dynamic_entry (DT_RELA, 0)
2081 || !add_dynamic_entry (DT_RELASZ, 0)
2082 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
252b5132
RH		 2083 return false;
2084 }
2085
29c2fb7c 2086 if ((info->flags & DF_TEXTREL) != 0)
252b5132 2087 {
dc810e39 2088 if (!add_dynamic_entry (DT_TEXTREL, 0))
252b5132 2089 return false;
d6cf2879 2090 info->flags |= DF_TEXTREL;
252b5132
RH		 2091 }
2092 }
dc810e39 2093#undef add_dynamic_entry
252b5132 2094
252b5132
RH		 2095 return true;
2096}
252b5132
RH		 2097\f
2098/* Look through the relocs for a section during the first phase, and
2099 allocate space in the global offset table or procedure linkage
2100 table. */
2101
2102static boolean
2103ppc_elf_check_relocs (abfd, info, sec, relocs)
2104 bfd *abfd;
2105 struct bfd_link_info *info;
2106 asection *sec;
2107 const Elf_Internal_Rela *relocs;
2108{
2109 bfd *dynobj;
2110 Elf_Internal_Shdr *symtab_hdr;
2111 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
2112 const Elf_Internal_Rela *rel;
2113 const Elf_Internal_Rela *rel_end;
2114 bfd_signed_vma *local_got_refcounts;
2115 elf_linker_section_t *sdata;
2116 elf_linker_section_t *sdata2;
2117 asection *sreloc;
2118 asection *sgot = NULL;
2119 asection *srelgot = NULL;
2120
2121 if (info->relocateable)
2122 return true;
2123
2124#ifdef DEBUG
2125 fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n",
2126 bfd_get_section_name (abfd, sec),
8f615d07 2127 bfd_archive_filename (abfd));
252b5132
RH		 2128#endif
2129
2130 /* Create the linker generated sections all the time so that the
2131 special symbols are created. */
2132
2133 if ((sdata = elf_linker_section (abfd, LINKER_SECTION_SDATA)) == NULL)
2134 {
2135 sdata = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA);
2136 if (!sdata)
2137 return false;
2138 }
2139
252b5132
RH		 2140 if ((sdata2 = elf_linker_section (abfd, LINKER_SECTION_SDATA2)) == NULL)
2141 {
2142 sdata2 = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA2);
2143 if (!sdata2)
2144 return false;
2145 }
2146
2147 dynobj = elf_hash_table (info)->dynobj;
2148 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2149 local_got_refcounts = elf_local_got_refcounts (abfd);
2150
2151 sym_hashes = elf_sym_hashes (abfd);
c3668558 2152 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
252b5132
RH		 2153 if (!elf_bad_symtab (abfd))
2154 sym_hashes_end -= symtab_hdr->sh_info;
2155
2156 sreloc = NULL;
2157
2158 rel_end = relocs + sec->reloc_count;
2159 for (rel = relocs; rel < rel_end; rel++)
2160 {
2161 unsigned long r_symndx;
2162 struct elf_link_hash_entry *h;
2163
2164 r_symndx = ELF32_R_SYM (rel->r_info);
2165 if (r_symndx < symtab_hdr->sh_info)
2166 h = NULL;
2167 else
2168 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2169
2170 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
2171 This shows up in particular in an R_PPC_ADDR32 in the eabi
2172 startup code. */
2173 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2174 {
2175 if (sgot == NULL)
2176 {
2177 if (dynobj == NULL)
2178 elf_hash_table (info)->dynobj = dynobj = abfd;
41fcb14e
AM		 2179 sgot = ppc_elf_create_got (dynobj, info);
2180 if (sgot == NULL)
252b5132 2181 return false;
252b5132
RH		 2182 }
2183 }
2184
2185 switch (ELF32_R_TYPE (rel->r_info))
2186 {
2187 /* GOT16 relocations */
2188 case R_PPC_GOT16:
2189 case R_PPC_GOT16_LO:
2190 case R_PPC_GOT16_HI:
2191 case R_PPC_GOT16_HA:
2192 /* This symbol requires a global offset table entry. */
2193
2194 if (sgot == NULL)
2195 {
2196 if (dynobj == NULL)
2197 elf_hash_table (info)->dynobj = dynobj = abfd;
41fcb14e
AM		 2198 sgot = ppc_elf_create_got (dynobj, info);
2199 if (sgot == NULL)
252b5132 2200 return false;
252b5132
RH		 2201 }
2202
2203 if (srelgot == NULL
2204 && (h != NULL || info->shared))
2205 {
2206 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2207 if (srelgot == NULL)
2208 {
2209 srelgot = bfd_make_section (dynobj, ".rela.got");
2210 if (srelgot == NULL
2211 || ! bfd_set_section_flags (dynobj, srelgot,
2212 (SEC_ALLOC
2213 | SEC_LOAD
2214 | SEC_HAS_CONTENTS
2215 | SEC_IN_MEMORY
2216 | SEC_LINKER_CREATED
2217 | SEC_READONLY))
2218 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
2219 return false;
2220 }
2221 }
2222
2223 if (h != NULL)
2224 {
51b64d56 2225 if (h->got.refcount == 0)
252b5132
RH		 2226 {
2227 /* Make sure this symbol is output as a dynamic symbol. */
2228 if (h->dynindx == -1)
2229 if (!bfd_elf32_link_record_dynamic_symbol (info, h))
2230 return false;
2231
2232 /* Allocate space in the .got. */
2233 sgot->_raw_size += 4;
2234 /* Allocate relocation space. */
2235 srelgot->_raw_size += sizeof (Elf32_External_Rela);
252b5132 2236 }
51b64d56 2237 h->got.refcount++;
252b5132
RH		 2238 }
2239 else
2240 {
2241 /* This is a global offset table entry for a local symbol. */
2242 if (local_got_refcounts == NULL)
2243 {
dc810e39 2244 bfd_size_type size;
252b5132 2245
dc810e39
AM		 2246 size = symtab_hdr->sh_info;
2247 size *= sizeof (bfd_signed_vma);
2248 local_got_refcounts
51b64d56 2249 = (bfd_signed_vma *) bfd_zalloc (abfd, size);
252b5132
RH		 2250 if (local_got_refcounts == NULL)
2251 return false;
2252 elf_local_got_refcounts (abfd) = local_got_refcounts;
252b5132 2253 }
51b64d56 2254 if (local_got_refcounts[r_symndx] == 0)
252b5132
RH		 2255 {
2256 sgot->_raw_size += 4;
2257
2258 /* If we are generating a shared object, we need to
2259 output a R_PPC_RELATIVE reloc so that the
2260 dynamic linker can adjust this GOT entry. */
2261 if (info->shared)
2262 srelgot->_raw_size += sizeof (Elf32_External_Rela);
252b5132 2263 }
51b64d56 2264 local_got_refcounts[r_symndx]++;
252b5132
RH		 2265 }
2266 break;
2267
2268 /* Indirect .sdata relocation */
2269 case R_PPC_EMB_SDAI16:
2270 if (info->shared)
2271 {
2272 ((*_bfd_error_handler)
2273 (_("%s: relocation %s cannot be used when making a shared object"),
8f615d07 2274 bfd_archive_filename (abfd), "R_PPC_EMB_SDAI16"));
8da6118f 2275 return false;
252b5132
RH		 2276 }
2277
2278 if (srelgot == NULL && (h != NULL || info->shared))
2279 {
2280 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2281 if (srelgot == NULL)
2282 {
2283 srelgot = bfd_make_section (dynobj, ".rela.got");
2284 if (srelgot == NULL
2285 || ! bfd_set_section_flags (dynobj, srelgot,
2286 (SEC_ALLOC
2287 | SEC_LOAD
2288 | SEC_HAS_CONTENTS
2289 | SEC_IN_MEMORY
2290 | SEC_LINKER_CREATED
2291 | SEC_READONLY))
2292 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
2293 return false;
2294 }
2295 }
2296
2297 if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata, h, rel))
2298 return false;
2299
2300 break;
2301
2302 /* Indirect .sdata2 relocation */
2303 case R_PPC_EMB_SDA2I16:
2304 if (info->shared)
2305 {
2306 ((*_bfd_error_handler)
2307 (_("%s: relocation %s cannot be used when making a shared object"),
8f615d07 2308 bfd_archive_filename (abfd), "R_PPC_EMB_SDA2I16"));
252b5132
RH		 2309 return false;
2310 }
2311
2312 if (srelgot == NULL && (h != NULL || info->shared))
2313 {
2314 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2315 if (srelgot == NULL)
2316 {
2317 srelgot = bfd_make_section (dynobj, ".rela.got");
2318 if (srelgot == NULL
2319 || ! bfd_set_section_flags (dynobj, srelgot,
2320 (SEC_ALLOC
2321 | SEC_LOAD
2322 | SEC_HAS_CONTENTS
2323 | SEC_IN_MEMORY
2324 | SEC_LINKER_CREATED
2325 | SEC_READONLY))
2326 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
2327 return false;
2328 }
2329 }
2330
2331 if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata2, h, rel))
2332 return false;
2333
2334 break;
2335
2336 case R_PPC_SDAREL16:
2337 case R_PPC_EMB_SDA2REL:
2338 case R_PPC_EMB_SDA21:
2339 if (info->shared)
2340 {
2341 ((*_bfd_error_handler)
2342 (_("%s: relocation %s cannot be used when making a shared object"),
8f615d07 2343 bfd_archive_filename (abfd),
8da6118f 2344 ppc_elf_howto_table[(int) ELF32_R_TYPE (rel->r_info)]->name));
252b5132
RH		 2345 return false;
2346 }
2347 break;
2348
2349 case R_PPC_PLT32:
2350 case R_PPC_PLTREL24:
2351 case R_PPC_PLT16_LO:
2352 case R_PPC_PLT16_HI:
2353 case R_PPC_PLT16_HA:
2354#ifdef DEBUG
2355 fprintf (stderr, "Reloc requires a PLT entry\n");
2356#endif
2357 /* This symbol requires a procedure linkage table entry. We
2358 actually build the entry in adjust_dynamic_symbol,
2359 because this might be a case of linking PIC code without
2360 linking in any dynamic objects, in which case we don't
2361 need to generate a procedure linkage table after all. */
2362
2363 if (h == NULL)
2364 {
2365 /* It does not make sense to have a procedure linkage
2366 table entry for a local symbol. */
2367 bfd_set_error (bfd_error_bad_value);
2368 return false;
2369 }
2370
2371 /* Make sure this symbol is output as a dynamic symbol. */
2372 if (h->dynindx == -1)
2373 {
2374 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2375 return false;
2376 }
51b64d56
AM		 2377 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2378 h->plt.refcount++;
252b5132
RH		 2379 break;
2380
2381 /* The following relocations don't need to propagate the
2382 relocation if linking a shared object since they are
2383 section relative. */
2384 case R_PPC_SECTOFF:
2385 case R_PPC_SECTOFF_LO:
2386 case R_PPC_SECTOFF_HI:
2387 case R_PPC_SECTOFF_HA:
2388 break;
2389
2390 /* This refers only to functions defined in the shared library */
2391 case R_PPC_LOCAL24PC:
2392 break;
2393
2394 /* This relocation describes the C++ object vtable hierarchy.
2395 Reconstruct it for later use during GC. */
2396 case R_PPC_GNU_VTINHERIT:
2397 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2398 return false;
2399 break;
2400
2401 /* This relocation describes which C++ vtable entries are actually
2402 used. Record for later use during GC. */
2403 case R_PPC_GNU_VTENTRY:
2404 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2405 return false;
2406 break;
2407
2408 /* When creating a shared object, we must copy these
2409 relocs into the output file. We create a reloc
2410 section in dynobj and make room for the reloc. */
2411 case R_PPC_REL24:
2412 case R_PPC_REL14:
2413 case R_PPC_REL14_BRTAKEN:
2414 case R_PPC_REL14_BRNTAKEN:
2415 case R_PPC_REL32:
2416 if (h == NULL
e1e0340b
GK		 2417 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
2418 || SYMBOL_REFERENCES_LOCAL (info, h))
252b5132
RH		 2419 break;
2420 /* fall through */
2421
2422 default:
2423 if (info->shared)
2424 {
2425#ifdef DEBUG
2426 fprintf (stderr, "ppc_elf_check_relocs need to create relocation for %s\n",
2427 (h && h->root.root.string) ? h->root.root.string : "<unknown>");
2428#endif
2429 if (sreloc == NULL)
2430 {
2431 const char *name;
2432
2433 name = (bfd_elf_string_from_elf_section
2434 (abfd,
2435 elf_elfheader (abfd)->e_shstrndx,
2436 elf_section_data (sec)->rel_hdr.sh_name));
2437 if (name == NULL)
2438 return false;
2439
2440 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
2441 && strcmp (bfd_get_section_name (abfd, sec),
2442 name + 5) == 0);
2443
2444 sreloc = bfd_get_section_by_name (dynobj, name);
2445 if (sreloc == NULL)
2446 {
2447 flagword flags;
2448
2449 sreloc = bfd_make_section (dynobj, name);
2450 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2451 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2452 if ((sec->flags & SEC_ALLOC) != 0)
2453 flags |= SEC_ALLOC | SEC_LOAD;
2454 if (sreloc == NULL
2455 || ! bfd_set_section_flags (dynobj, sreloc, flags)
2456 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
2457 return false;
2458 }
29c2fb7c
AJ		 2459 if (sec->flags & SEC_READONLY)
2460 info->flags |= DF_TEXTREL;
252b5132
RH		 2461 }
2462
2463 sreloc->_raw_size += sizeof (Elf32_External_Rela);
2464
2465 /* FIXME: We should here do what the m68k and i386
2466 backends do: if the reloc is pc-relative, record it
2467 in case it turns out that the reloc is unnecessary
2468 because the symbol is forced local by versioning or
2469 we are linking with -Bdynamic. Fortunately this
2470 case is not frequent. */
2471 }
2472
2473 break;
2474 }
2475 }
2476
2477 return true;
2478}
2479
2480/* Return the section that should be marked against GC for a given
2481 relocation. */
2482
2483static asection *
1e2f5b6e
AM		 2484ppc_elf_gc_mark_hook (sec, info, rel, h, sym)
2485 asection *sec;
5f771d47 2486 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH		 2487 Elf_Internal_Rela *rel;
2488 struct elf_link_hash_entry *h;
2489 Elf_Internal_Sym *sym;
2490{
2491 if (h != NULL)
2492 {
2493 switch (ELF32_R_TYPE (rel->r_info))
2494 {
2495 case R_PPC_GNU_VTINHERIT:
2496 case R_PPC_GNU_VTENTRY:
2497 break;
2498
2499 default:
2500 switch (h->root.type)
2501 {
2502 case bfd_link_hash_defined:
2503 case bfd_link_hash_defweak:
2504 return h->root.u.def.section;
2505
2506 case bfd_link_hash_common:
2507 return h->root.u.c.p->section;
2508
2509 default:
2510 break;
2511 }
2512 }
2513 }
2514 else
1e2f5b6e 2515 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
252b5132
RH		 2516
2517 return NULL;
2518}
2519
2520/* Update the got entry reference counts for the section being removed. */
2521
2522static boolean
2523ppc_elf_gc_sweep_hook (abfd, info, sec, relocs)
2524 bfd *abfd;
5f771d47 2525 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH		 2526 asection *sec;
2527 const Elf_Internal_Rela *relocs;
2528{
2529 Elf_Internal_Shdr *symtab_hdr;
2530 struct elf_link_hash_entry **sym_hashes;
2531 bfd_signed_vma *local_got_refcounts;
2532 const Elf_Internal_Rela *rel, *relend;
2533 unsigned long r_symndx;
2534 struct elf_link_hash_entry *h;
2535
2536 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2537 sym_hashes = elf_sym_hashes (abfd);
2538 local_got_refcounts = elf_local_got_refcounts (abfd);
2539
2540 relend = relocs + sec->reloc_count;
2541 for (rel = relocs; rel < relend; rel++)
2542 switch (ELF32_R_TYPE (rel->r_info))
2543 {
2544 case R_PPC_GOT16:
2545 case R_PPC_GOT16_LO:
2546 case R_PPC_GOT16_HI:
2547 case R_PPC_GOT16_HA:
2548 r_symndx = ELF32_R_SYM (rel->r_info);
2549 if (r_symndx >= symtab_hdr->sh_info)
2550 {
2551 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2552 if (h->got.refcount > 0)
2553 h->got.refcount--;
2554 }
dd5724d5 2555 else if (local_got_refcounts != NULL)
252b5132
RH		 2556 {
2557 if (local_got_refcounts[r_symndx] > 0)
2558 local_got_refcounts[r_symndx]--;
2559 }
2560 break;
2561
2562 case R_PPC_PLT32:
2563 case R_PPC_PLTREL24:
2564 case R_PPC_PLT16_LO:
2565 case R_PPC_PLT16_HI:
2566 case R_PPC_PLT16_HA:
2567 r_symndx = ELF32_R_SYM (rel->r_info);
2568 if (r_symndx >= symtab_hdr->sh_info)
2569 {
2570 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2571 if (h->plt.refcount > 0)
2572 h->plt.refcount--;
2573 }
2574 break;
2575
2576 default:
2577 break;
2578 }
2579
2580 return true;
2581}
2582\f
2583/* Hook called by the linker routine which adds symbols from an object
2584 file. We use it to put .comm items in .sbss, and not .bss. */
2585
252b5132
RH		 2586static boolean
2587ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
2588 bfd *abfd;
2589 struct bfd_link_info *info;
2590 const Elf_Internal_Sym *sym;
5f771d47
ILT		 2591 const char **namep ATTRIBUTE_UNUSED;
2592 flagword *flagsp ATTRIBUTE_UNUSED;
252b5132
RH		 2593 asection **secp;
2594 bfd_vma *valp;
2595{
2596 if (sym->st_shndx == SHN_COMMON
2597 && !info->relocateable
27242387
AM		 2598 && sym->st_size <= elf_gp_size (abfd)
2599 && info->hash->creator->flavour == bfd_target_elf_flavour)
252b5132
RH		 2600 {
2601 /* Common symbols less than or equal to -G nn bytes are automatically
2602 put into .sdata. */
2603 elf_linker_section_t *sdata
2604 = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA);
2605
2606 if (!sdata->bss_section)
2607 {
dc810e39
AM		 2608 bfd_size_type amt;
2609
252b5132
RH		 2610 /* We don't go through bfd_make_section, because we don't
2611 want to attach this common section to DYNOBJ. The linker
2612 will move the symbols to the appropriate output section
2613 when it defines common symbols. */
dc810e39
AM		 2614 amt = sizeof (asection);
2615 sdata->bss_section = (asection *) bfd_zalloc (abfd, amt);
252b5132
RH		 2616 if (sdata->bss_section == NULL)
2617 return false;
2618 sdata->bss_section->name = sdata->bss_name;
2619 sdata->bss_section->flags = SEC_IS_COMMON;
2620 sdata->bss_section->output_section = sdata->bss_section;
dc810e39
AM		 2621 amt = sizeof (asymbol);
2622 sdata->bss_section->symbol = (asymbol *) bfd_zalloc (abfd, amt);
2623 amt = sizeof (asymbol *);
252b5132 2624 sdata->bss_section->symbol_ptr_ptr =
dc810e39 2625 (asymbol **) bfd_zalloc (abfd, amt);
252b5132
RH		 2626 if (sdata->bss_section->symbol == NULL
2627 || sdata->bss_section->symbol_ptr_ptr == NULL)
2628 return false;
2629 sdata->bss_section->symbol->name = sdata->bss_name;
2630 sdata->bss_section->symbol->flags = BSF_SECTION_SYM;
2631 sdata->bss_section->symbol->section = sdata->bss_section;
2632 *sdata->bss_section->symbol_ptr_ptr = sdata->bss_section->symbol;
2633 }
2634
2635 *secp = sdata->bss_section;
2636 *valp = sym->st_size;
2637 }
2638
2639 return true;
2640}
252b5132
RH		 2641\f
2642/* Finish up dynamic symbol handling. We set the contents of various
2643 dynamic sections here. */
2644
2645static boolean
2646ppc_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
2647 bfd *output_bfd;
2648 struct bfd_link_info *info;
2649 struct elf_link_hash_entry *h;
2650 Elf_Internal_Sym *sym;
2651{
2652 bfd *dynobj;
2653
2654#ifdef DEBUG
2655 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
2656 h->root.root.string);
2657#endif
2658
2659 dynobj = elf_hash_table (info)->dynobj;
2660 BFD_ASSERT (dynobj != NULL);
2661
2662 if (h->plt.offset != (bfd_vma) -1)
2663 {
2664 asection *splt;
2665 asection *srela;
2666 Elf_Internal_Rela rela;
947216bf 2667 bfd_byte *loc;
252b5132
RH		 2668 bfd_vma reloc_index;
2669
2670#ifdef DEBUG
2671 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
2672#endif
2673
2674 /* This symbol has an entry in the procedure linkage table. Set
2675 it up. */
2676
2677 BFD_ASSERT (h->dynindx != -1);
2678
2679 splt = bfd_get_section_by_name (dynobj, ".plt");
2680 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
2681 BFD_ASSERT (splt != NULL && srela != NULL);
2682
2683 /* We don't need to fill in the .plt. The ppc dynamic linker
2684 will fill it in. */
2685
2686 /* Fill in the entry in the .rela.plt section. */
2687 rela.r_offset = (splt->output_section->vma
2688 + splt->output_offset
2689 + h->plt.offset);
2690 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
2691 rela.r_addend = 0;
2692
2693 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
2694 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
2695 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
947216bf
AM		 2696 loc = srela->contents + reloc_index * sizeof (Elf32_External_Rela);
2697 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
252b5132
RH		 2698
2699 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2700 {
2701 /* Mark the symbol as undefined, rather than as defined in
2702 the .plt section. Leave the value alone. */
2703 sym->st_shndx = SHN_UNDEF;
a4b120e1
GK		 2704 /* If the symbol is weak, we do need to clear the value.
2705 Otherwise, the PLT entry would provide a definition for
2706 the symbol even if the symbol wasn't defined anywhere,
2707 and so the symbol would never be NULL. */
c3668558 2708 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
a4b120e1
GK		 2709 == 0)
2710 sym->st_value = 0;
252b5132
RH		 2711 }
2712 }
2713
2714 if (h->got.offset != (bfd_vma) -1)
2715 {
2716 asection *sgot;
2717 asection *srela;
2718 Elf_Internal_Rela rela;
947216bf 2719 bfd_byte *loc;
252b5132
RH		 2720
2721 /* This symbol has an entry in the global offset table. Set it
2722 up. */
2723
2724 sgot = bfd_get_section_by_name (dynobj, ".got");
2725 srela = bfd_get_section_by_name (dynobj, ".rela.got");
2726 BFD_ASSERT (sgot != NULL && srela != NULL);
2727
2728 rela.r_offset = (sgot->output_section->vma
2729 + sgot->output_offset
dc810e39 2730 + (h->got.offset &~ (bfd_vma) 1));
252b5132
RH		 2731
2732 /* If this is a -Bsymbolic link, and the symbol is defined
2733 locally, we just want to emit a RELATIVE reloc. The entry in
2734 the global offset table will already have been initialized in
2735 the relocate_section function. */
2736 if (info->shared
e1e0340b 2737 && SYMBOL_REFERENCES_LOCAL (info, h))
252b5132
RH		 2738 {
2739 rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
2740 rela.r_addend = (h->root.u.def.value
2741 + h->root.u.def.section->output_section->vma
2742 + h->root.u.def.section->output_offset);
2743 }
2744 else
2745 {
8da6118f 2746 BFD_ASSERT ((h->got.offset & 1) == 0);
252b5132
RH		 2747 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_GLOB_DAT);
2748 rela.r_addend = 0;
2749 }
2750
2243deae 2751 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
947216bf
AM		 2752 loc = srela->contents;
2753 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2754 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
252b5132
RH		 2755 }
2756
2757 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2758 {
2759 asection *s;
2760 Elf_Internal_Rela rela;
947216bf 2761 bfd_byte *loc;
252b5132
RH		 2762
2763 /* This symbols needs a copy reloc. Set it up. */
2764
2765#ifdef DEBUG
2766 fprintf (stderr, ", copy");
2767#endif
2768
2769 BFD_ASSERT (h->dynindx != -1);
2770
2771 if (h->size <= elf_gp_size (dynobj))
2772 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2773 ".rela.sbss");
2774 else
2775 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2776 ".rela.bss");
2777 BFD_ASSERT (s != NULL);
2778
2779 rela.r_offset = (h->root.u.def.value
2780 + h->root.u.def.section->output_section->vma
2781 + h->root.u.def.section->output_offset);
2782 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
2783 rela.r_addend = 0;
947216bf
AM		 2784 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2785 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
252b5132
RH		 2786 }
2787
2788#ifdef DEBUG
2789 fprintf (stderr, "\n");
2790#endif
2791
2792 /* Mark some specially defined symbols as absolute. */
2793 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2794 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
2795 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
2796 sym->st_shndx = SHN_ABS;
2797
2798 return true;
2799}
252b5132
RH		 2800\f
2801/* Finish up the dynamic sections. */
2802
2803static boolean
2804ppc_elf_finish_dynamic_sections (output_bfd, info)
2805 bfd *output_bfd;
2806 struct bfd_link_info *info;
2807{
2808 asection *sdyn;
2809 bfd *dynobj = elf_hash_table (info)->dynobj;
2810 asection *sgot = bfd_get_section_by_name (dynobj, ".got");
2811
2812#ifdef DEBUG
2813 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
2814#endif
2815
2816 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2817
2818 if (elf_hash_table (info)->dynamic_sections_created)
2819 {
2820 asection *splt;
2821 Elf32_External_Dyn *dyncon, *dynconend;
2822
2823 splt = bfd_get_section_by_name (dynobj, ".plt");
2824 BFD_ASSERT (splt != NULL && sdyn != NULL);
2825
2826 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2827 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2828 for (; dyncon < dynconend; dyncon++)
2829 {
2830 Elf_Internal_Dyn dyn;
2831 const char *name;
2832 boolean size;
2833
2834 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2835
2836 switch (dyn.d_tag)
2837 {
2838 case DT_PLTGOT: name = ".plt"; size = false; break;
2839 case DT_PLTRELSZ: name = ".rela.plt"; size = true; break;
2840 case DT_JMPREL: name = ".rela.plt"; size = false; break;
2841 default: name = NULL; size = false; break;
2842 }
2843
2844 if (name != NULL)
2845 {
2846 asection *s;
2847
2848 s = bfd_get_section_by_name (output_bfd, name);
2849 if (s == NULL)
2850 dyn.d_un.d_val = 0;
2851 else
2852 {
2853 if (! size)
2854 dyn.d_un.d_ptr = s->vma;
2855 else
2856 {
2857 if (s->_cooked_size != 0)
2858 dyn.d_un.d_val = s->_cooked_size;
2859 else
2860 dyn.d_un.d_val = s->_raw_size;
2861 }
2862 }
2863 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2864 }
2865 }
2866 }
2867
2868 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
2869 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
2870 if (sgot)
2871 {
2872 unsigned char *contents = sgot->contents;
dc810e39 2873 bfd_put_32 (output_bfd, (bfd_vma) 0x4e800021 /* blrl */, contents);
252b5132
RH		 2874
2875 if (sdyn == NULL)
2876 bfd_put_32 (output_bfd, (bfd_vma) 0, contents+4);
2877 else
2878 bfd_put_32 (output_bfd,
2879 sdyn->output_section->vma + sdyn->output_offset,
2880 contents+4);
2881
2882 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2883 }
2884
252b5132
RH		 2885 return true;
2886}
252b5132
RH		 2887\f
2888/* The RELOCATE_SECTION function is called by the ELF backend linker
2889 to handle the relocations for a section.
2890
2891 The relocs are always passed as Rela structures; if the section
2892 actually uses Rel structures, the r_addend field will always be
2893 zero.
2894
2895 This function is responsible for adjust the section contents as
2896 necessary, and (if using Rela relocs and generating a
2897 relocateable output file) adjusting the reloc addend as
2898 necessary.
2899
2900 This function does not have to worry about setting the reloc
2901 address or the reloc symbol index.
2902
2903 LOCAL_SYMS is a pointer to the swapped in local symbols.
2904
2905 LOCAL_SECTIONS is an array giving the section in the input file
2906 corresponding to the st_shndx field of each local symbol.
2907
2908 The global hash table entry for the global symbols can be found
2909 via elf_sym_hashes (input_bfd).
2910
2911 When generating relocateable output, this function must handle
2912 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2913 going to be the section symbol corresponding to the output
2914 section, which means that the addend must be adjusted
2915 accordingly. */
2916
2917static boolean
2918ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section,
2919 contents, relocs, local_syms, local_sections)
2920 bfd *output_bfd;
2921 struct bfd_link_info *info;
2922 bfd *input_bfd;
2923 asection *input_section;
2924 bfd_byte *contents;
2925 Elf_Internal_Rela *relocs;
2926 Elf_Internal_Sym *local_syms;
2927 asection **local_sections;
2928{
2929 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2930 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
2931 bfd *dynobj = elf_hash_table (info)->dynobj;
2932 elf_linker_section_t *sdata = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA) : NULL;
2933 elf_linker_section_t *sdata2 = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA2) : NULL;
2934 Elf_Internal_Rela *rel = relocs;
2935 Elf_Internal_Rela *relend = relocs + input_section->reloc_count;
2936 asection *sreloc = NULL;
2937 asection *splt;
2938 asection *sgot;
2939 bfd_vma *local_got_offsets;
2940 boolean ret = true;
2941 long insn;
2942
2943#ifdef DEBUG
2944 fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n",
8f615d07 2945 bfd_archive_filename (input_bfd),
252b5132 2946 bfd_section_name(input_bfd, input_section),
8da6118f 2947 (long) input_section->reloc_count,
252b5132
RH		 2948 (info->relocateable) ? " (relocatable)" : "");
2949#endif
2950
b491616a
AM		 2951 if (info->relocateable)
2952 return true;
2953
8da6118f
KH		 2954 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2955 /* Initialize howto table if needed. */
252b5132
RH		 2956 ppc_elf_howto_init ();
2957
2958 local_got_offsets = elf_local_got_offsets (input_bfd);
2959
2960 splt = sgot = NULL;
2961 if (dynobj != NULL)
2962 {
2963 splt = bfd_get_section_by_name (dynobj, ".plt");
2964 sgot = bfd_get_section_by_name (dynobj, ".got");
2965 }
2966
2967 for (; rel < relend; rel++)
2968 {
2969 enum elf_ppc_reloc_type r_type = (enum elf_ppc_reloc_type)ELF32_R_TYPE (rel->r_info);
2970 bfd_vma offset = rel->r_offset;
2971 bfd_vma addend = rel->r_addend;
2972 bfd_reloc_status_type r = bfd_reloc_other;
8da6118f
KH		 2973 Elf_Internal_Sym *sym = (Elf_Internal_Sym *) 0;
2974 asection *sec = (asection *) 0;
2975 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) 0;
2976 const char *sym_name = (const char *) 0;
252b5132
RH		 2977 reloc_howto_type *howto;
2978 unsigned long r_symndx;
2979 bfd_vma relocation;
e1e0340b 2980 int will_become_local;
252b5132
RH		 2981
2982 /* Unknown relocation handling */
8da6118f
KH		 2983 if ((unsigned) r_type >= (unsigned) R_PPC_max
2984 || !ppc_elf_howto_table[(int) r_type])
252b5132
RH		 2985 {
2986 (*_bfd_error_handler) (_("%s: unknown relocation type %d"),
8f615d07 2987 bfd_archive_filename (input_bfd),
8da6118f 2988 (int) r_type);
252b5132
RH		 2989
2990 bfd_set_error (bfd_error_bad_value);
2991 ret = false;
2992 continue;
2993 }
2994
8da6118f 2995 howto = ppc_elf_howto_table[(int) r_type];
252b5132
RH		 2996 r_symndx = ELF32_R_SYM (rel->r_info);
2997
252b5132
RH		 2998 if (r_symndx < symtab_hdr->sh_info)
2999 {
3000 sym = local_syms + r_symndx;
3001 sec = local_sections[r_symndx];
3002 sym_name = "<local symbol>";
3003
f8df10f4
JJ		 3004 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
3005 addend = rel->r_addend;
e1e0340b
GK		 3006 /* Relocs to local symbols are always resolved. */
3007 will_become_local = 1;
252b5132
RH		 3008 }
3009 else
3010 {
3011 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3012 while (h->root.type == bfd_link_hash_indirect
3013 || h->root.type == bfd_link_hash_warning)
3014 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3015 sym_name = h->root.root.string;
e1e0340b
GK		 3016
3017 /* Can this relocation be resolved immediately? */
3018 will_become_local = SYMBOL_REFERENCES_LOCAL (info, h);
3019
252b5132
RH		 3020 if (h->root.type == bfd_link_hash_defined
3021 || h->root.type == bfd_link_hash_defweak)
3022 {
3023 sec = h->root.u.def.section;
e1e0340b
GK		 3024 if (((r_type == R_PPC_PLT32
3025 || r_type == R_PPC_PLTREL24)
dd5724d5 3026 && splt != NULL
252b5132
RH		 3027 && h->plt.offset != (bfd_vma) -1)
3028 || (r_type == R_PPC_LOCAL24PC
3029 && sec->output_section == NULL)
3030 || ((r_type == R_PPC_GOT16
3031 || r_type == R_PPC_GOT16_LO
3032 || r_type == R_PPC_GOT16_HI
3033 || r_type == R_PPC_GOT16_HA)
3034 && elf_hash_table (info)->dynamic_sections_created
e1e0340b 3035 && (! info->shared || ! will_become_local))
252b5132 3036 || (info->shared
e1e0340b 3037 && ! will_become_local
2d146250
ILT		 3038 && ((input_section->flags & SEC_ALLOC) != 0
3039 /* Testing SEC_DEBUGGING here may be wrong.
3040 It's here to avoid a crash when
3041 generating a shared library with DWARF
3042 debugging information. */
1319985e
AM		 3043 || ((input_section->flags & SEC_DEBUGGING) != 0
3044 && (h->elf_link_hash_flags
3045 & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
252b5132
RH		 3046 && (r_type == R_PPC_ADDR32
3047 || r_type == R_PPC_ADDR24
3048 || r_type == R_PPC_ADDR16
3049 || r_type == R_PPC_ADDR16_LO
3050 || r_type == R_PPC_ADDR16_HI
3051 || r_type == R_PPC_ADDR16_HA
3052 || r_type == R_PPC_ADDR14
3053 || r_type == R_PPC_ADDR14_BRTAKEN
3054 || r_type == R_PPC_ADDR14_BRNTAKEN
252b5132
RH		 3055 || r_type == R_PPC_COPY
3056 || r_type == R_PPC_GLOB_DAT
3057 || r_type == R_PPC_JMP_SLOT
3058 || r_type == R_PPC_UADDR32
3059 || r_type == R_PPC_UADDR16
3060 || r_type == R_PPC_SDAREL16
3061 || r_type == R_PPC_EMB_NADDR32
3062 || r_type == R_PPC_EMB_NADDR16
3063 || r_type == R_PPC_EMB_NADDR16_LO
3064 || r_type == R_PPC_EMB_NADDR16_HI
3065 || r_type == R_PPC_EMB_NADDR16_HA
3066 || r_type == R_PPC_EMB_SDAI16
3067 || r_type == R_PPC_EMB_SDA2I16
3068 || r_type == R_PPC_EMB_SDA2REL
3069 || r_type == R_PPC_EMB_SDA21
3070 || r_type == R_PPC_EMB_MRKREF
3071 || r_type == R_PPC_EMB_BIT_FLD
3072 || r_type == R_PPC_EMB_RELSDA
3073 || ((r_type == R_PPC_REL24
3074 || r_type == R_PPC_REL32
3075 || r_type == R_PPC_REL14
3076 || r_type == R_PPC_REL14_BRTAKEN
3077 || r_type == R_PPC_REL14_BRNTAKEN
3078 || r_type == R_PPC_RELATIVE)
3079 && strcmp (h->root.root.string,
3080 "_GLOBAL_OFFSET_TABLE_") != 0))))
3081 {
3082 /* In these cases, we don't need the relocation
3083 value. We check specially because in some
3084 obscure cases sec->output_section will be NULL. */
3085 relocation = 0;
3086 }
2d146250 3087 else if (sec->output_section == NULL)
8da6118f 3088 {
2d146250
ILT		 3089 (*_bfd_error_handler)
3090 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
8f615d07 3091 bfd_archive_filename (input_bfd), h->root.root.string,
2d146250
ILT		 3092 bfd_get_section_name (input_bfd, input_section));
3093 relocation = 0;
8da6118f 3094 }
252b5132
RH		 3095 else
3096 relocation = (h->root.u.def.value
3097 + sec->output_section->vma
3098 + sec->output_offset);
3099 }
3100 else if (h->root.type == bfd_link_hash_undefweak)
3101 relocation = 0;
671bae9c
NC		 3102 else if (info->shared
3103 && (!info->symbolic || info->allow_shlib_undefined)
3104 && !info->no_undefined
3a27a730 3105 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
252b5132
RH		 3106 relocation = 0;
3107 else
3108 {
c3668558 3109 if (! (*info->callbacks->undefined_symbol) (info,
464e1740
ILT		 3110 h->root.root.string,
3111 input_bfd,
3112 input_section,
5cc7c785
L		 3113 rel->r_offset,
3114 (!info->shared
3a27a730 3115 || info->no_undefined
ba09750c 3116 || ELF_ST_VISIBILITY (h->other))))
464e1740
ILT		 3117 return false;
3118 relocation = 0;
252b5132
RH		 3119 }
3120 }
3121
8da6118f 3122 switch ((int) r_type)
252b5132
RH		 3123 {
3124 default:
3125 (*_bfd_error_handler) (_("%s: unknown relocation type %d for symbol %s"),
8f615d07 3126 bfd_archive_filename (input_bfd),
8da6118f 3127 (int) r_type, sym_name);
252b5132
RH		 3128
3129 bfd_set_error (bfd_error_bad_value);
3130 ret = false;
3131 continue;
3132
7595d193
L		 3133 case (int) R_PPC_NONE:
3134 continue;
3135
252b5132 3136 /* Relocations that need no special processing. */
8da6118f 3137 case (int) R_PPC_LOCAL24PC:
252b5132
RH		 3138 /* It makes no sense to point a local relocation
3139 at a symbol not in this object. */
3140 if (h != NULL
3141 && (h->root.type == bfd_link_hash_defined
3142 || h->root.type == bfd_link_hash_defweak)
3143 && sec->output_section == NULL)
3144 {
464e1740
ILT		 3145 if (! (*info->callbacks->undefined_symbol) (info,
3146 h->root.root.string,
3147 input_bfd,
3148 input_section,
5cc7c785
L		 3149 rel->r_offset,
3150 true))
464e1740 3151 return false;
252b5132
RH		 3152 continue;
3153 }
3154 break;
3155
3156 /* Relocations that may need to be propagated if this is a shared
3157 object. */
8da6118f
KH		 3158 case (int) R_PPC_REL24:
3159 case (int) R_PPC_REL32:
3160 case (int) R_PPC_REL14:
252b5132
RH		 3161 /* If these relocations are not to a named symbol, they can be
3162 handled right here, no need to bother the dynamic linker. */
3163 if (h == NULL
e1e0340b
GK		 3164 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3165 || SYMBOL_REFERENCES_LOCAL (info, h))
252b5132
RH		 3166 break;
3167 /* fall through */
3168
3169 /* Relocations that always need to be propagated if this is a shared
3170 object. */
8da6118f
KH		 3171 case (int) R_PPC_ADDR32:
3172 case (int) R_PPC_ADDR24:
3173 case (int) R_PPC_ADDR16:
3174 case (int) R_PPC_ADDR16_LO:
3175 case (int) R_PPC_ADDR16_HI:
3176 case (int) R_PPC_ADDR16_HA:
3177 case (int) R_PPC_ADDR14:
3178 case (int) R_PPC_UADDR32:
3179 case (int) R_PPC_UADDR16:
ec338859 3180 if (info->shared && r_symndx != 0)
252b5132
RH		 3181 {
3182 Elf_Internal_Rela outrel;
947216bf 3183 bfd_byte *loc;
0bb2d96a 3184 int skip;
252b5132
RH		 3185
3186#ifdef DEBUG
3187 fprintf (stderr, "ppc_elf_relocate_section need to create relocation for %s\n",
3188 (h && h->root.root.string) ? h->root.root.string : "<unknown>");
3189#endif
3190
3191 /* When generating a shared object, these relocations
3192 are copied into the output file to be resolved at run
3193 time. */
3194
3195 if (sreloc == NULL)
3196 {
3197 const char *name;
3198
3199 name = (bfd_elf_string_from_elf_section
3200 (input_bfd,
3201 elf_elfheader (input_bfd)->e_shstrndx,
3202 elf_section_data (input_section)->rel_hdr.sh_name));
3203 if (name == NULL)
3204 return false;
3205
3206 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3207 && strcmp (bfd_get_section_name (input_bfd,
3208 input_section),
3209 name + 5) == 0);
3210
3211 sreloc = bfd_get_section_by_name (dynobj, name);
3212 BFD_ASSERT (sreloc != NULL);
3213 }
3214
0bb2d96a 3215 skip = 0;
252b5132 3216
c629eae0
JJ		 3217 outrel.r_offset =
3218 _bfd_elf_section_offset (output_bfd, info, input_section,
3219 rel->r_offset);
0bb2d96a
JJ		 3220 if (outrel.r_offset == (bfd_vma) -1
3221 || outrel.r_offset == (bfd_vma) -2)
3222 skip = (int) outrel.r_offset;
252b5132
RH		 3223 outrel.r_offset += (input_section->output_section->vma
3224 + input_section->output_offset);
3225
3226 if (skip)
3227 memset (&outrel, 0, sizeof outrel);
3228 /* h->dynindx may be -1 if this symbol was marked to
3229 become local. */
e1e0340b 3230 else if (! will_become_local)
252b5132 3231 {
252b5132
RH		 3232 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3233 outrel.r_addend = rel->r_addend;
3234 }
3235 else
3236 {
3237 if (r_type == R_PPC_ADDR32)
3238 {
3239 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
3240 outrel.r_addend = relocation + rel->r_addend;
3241 }
3242 else
3243 {
3244 long indx;
3245
3246 if (h == NULL)
3247 sec = local_sections[r_symndx];
3248 else
3249 {
3250 BFD_ASSERT (h->root.type == bfd_link_hash_defined
3251 || (h->root.type
3252 == bfd_link_hash_defweak));
3253 sec = h->root.u.def.section;
3254 }
3255 if (sec != NULL && bfd_is_abs_section (sec))
3256 indx = 0;
3257 else if (sec == NULL || sec->owner == NULL)
3258 {
3259 bfd_set_error (bfd_error_bad_value);
3260 return false;
3261 }
3262 else
3263 {
3264 asection *osec;
3265
3266 osec = sec->output_section;
3267 indx = elf_section_data (osec)->dynindx;
8da6118f 3268 BFD_ASSERT (indx > 0);
252b5132
RH		 3269#ifdef DEBUG
3270 if (indx <= 0)
3271 {
c3668558 3272 printf ("indx=%d section=%s flags=%08x name=%s\n",
252b5132
RH		 3273 indx, osec->name, osec->flags,
3274 h->root.root.string);
3275 }
3276#endif
3277 }
3278
3279 outrel.r_info = ELF32_R_INFO (indx, r_type);
3280 outrel.r_addend = relocation + rel->r_addend;
3281 }
3282 }
3283
947216bf
AM		 3284 loc = sreloc->contents;
3285 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3286 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
252b5132 3287
2243deae 3288 if (skip == -1)
252b5132 3289 continue;
2243deae
L		 3290
3291 /* This reloc will be computed at runtime. We clear the memory
3292 so that it contains predictable value. */
3293 if (! skip
3294 && ((input_section->flags & SEC_ALLOC) != 0
3295 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
3296 {
3297 relocation = howto->pc_relative ? outrel.r_offset : 0;
3298 addend = 0;
3299 break;
3300 }
252b5132
RH		 3301 }
3302
3303 /* Arithmetic adjust relocations that aren't going into a
3304 shared object. */
3305 if (r_type == R_PPC_ADDR16_HA
3306 /* It's just possible that this symbol is a weak symbol
3307 that's not actually defined anywhere. In that case,
3308 'sec' would be NULL, and we should leave the symbol
3309 alone (it will be set to zero elsewhere in the link). */
3310 && sec != NULL)
3311 {
3312 addend += ((relocation + addend) & 0x8000) << 1;
3313 }
3314 break;
3315
3316 /* branch taken prediction relocations */
8da6118f
KH		 3317 case (int) R_PPC_ADDR14_BRTAKEN:
3318 case (int) R_PPC_REL14_BRTAKEN:
252b5132
RH		 3319 insn = bfd_get_32 (output_bfd, contents + offset);
3320 if ((relocation - offset) & 0x8000)
3321 insn &= ~BRANCH_PREDICT_BIT;
3322 else
3323 insn |= BRANCH_PREDICT_BIT;
dc810e39 3324 bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
252b5132
RH		 3325 break;
3326
3327 /* branch not taken predicition relocations */
8da6118f
KH		 3328 case (int) R_PPC_ADDR14_BRNTAKEN:
3329 case (int) R_PPC_REL14_BRNTAKEN:
252b5132
RH		 3330 insn = bfd_get_32 (output_bfd, contents + offset);
3331 if ((relocation - offset) & 0x8000)
3332 insn |= BRANCH_PREDICT_BIT;
3333 else
3334 insn &= ~BRANCH_PREDICT_BIT;
dc810e39 3335 bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
252b5132
RH		 3336 break;
3337
3338 /* GOT16 relocations */
8da6118f
KH		 3339 case (int) R_PPC_GOT16:
3340 case (int) R_PPC_GOT16_LO:
3341 case (int) R_PPC_GOT16_HI:
3342 case (int) R_PPC_GOT16_HA:
252b5132
RH		 3343 /* Relocation is to the entry for this symbol in the global
3344 offset table. */
3345 BFD_ASSERT (sgot != NULL);
3346
3347 if (h != NULL)
3348 {
3349 bfd_vma off;
3350
3351 off = h->got.offset;
3352 BFD_ASSERT (off != (bfd_vma) -1);
3353
3354 if (! elf_hash_table (info)->dynamic_sections_created
3355 || (info->shared
e1e0340b 3356 && SYMBOL_REFERENCES_LOCAL (info, h)))
252b5132
RH		 3357 {
3358 /* This is actually a static link, or it is a
3359 -Bsymbolic link and the symbol is defined
3360 locally. We must initialize this entry in the
3361 global offset table. Since the offset must
3362 always be a multiple of 4, we use the least
3363 significant bit to record whether we have
3364 initialized it already.
3365
3366 When doing a dynamic link, we create a .rela.got
3367 relocation entry to initialize the value. This
3368 is done in the finish_dynamic_symbol routine. */
3369 if ((off & 1) != 0)
3370 off &= ~1;
3371 else
3372 {
3373 bfd_put_32 (output_bfd, relocation,
3374 sgot->contents + off);
3375 h->got.offset |= 1;
3376 }
3377 }
3378
3379 relocation = sgot->output_offset + off - 4;
3380 }
3381 else
3382 {
3383 bfd_vma off;
3384
3385 BFD_ASSERT (local_got_offsets != NULL
3386 && local_got_offsets[r_symndx] != (bfd_vma) -1);
3387
3388 off = local_got_offsets[r_symndx];
3389
3390 /* The offset must always be a multiple of 4. We use
3391 the least significant bit to record whether we have
3392 already processed this entry. */
3393 if ((off & 1) != 0)
3394 off &= ~1;
3395 else
3396 {
252b5132
RH		 3397
3398 if (info->shared)
3399 {
3400 asection *srelgot;
3401 Elf_Internal_Rela outrel;
947216bf 3402 bfd_byte *loc;
252b5132
RH		 3403
3404 /* We need to generate a R_PPC_RELATIVE reloc
3405 for the dynamic linker. */
3406 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3407 BFD_ASSERT (srelgot != NULL);
3408
3409 outrel.r_offset = (sgot->output_section->vma
3410 + sgot->output_offset
3411 + off);
3412 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
3413 outrel.r_addend = relocation;
947216bf
AM		 3414 loc = srelgot->contents;
3415 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3416 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2243deae 3417 relocation = 0;
252b5132
RH		 3418 }
3419
2243deae 3420 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
252b5132
RH		 3421 local_got_offsets[r_symndx] |= 1;
3422 }
3423
3424 relocation = sgot->output_offset + off - 4;
3425 }
3426 break;
3427
3428 /* Indirect .sdata relocation */
8da6118f 3429 case (int) R_PPC_EMB_SDAI16:
252b5132
RH		 3430 BFD_ASSERT (sdata != NULL);
3431 relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info,
3432 sdata, h, relocation, rel,
3433 R_PPC_RELATIVE);
3434 break;
3435
3436 /* Indirect .sdata2 relocation */
8da6118f 3437 case (int) R_PPC_EMB_SDA2I16:
252b5132
RH		 3438 BFD_ASSERT (sdata2 != NULL);
3439 relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info,
3440 sdata2, h, relocation, rel,
3441 R_PPC_RELATIVE);
3442 break;
3443
3444 /* Handle the TOC16 reloc. We want to use the offset within the .got
3445 section, not the actual VMA. This is appropriate when generating
3446 an embedded ELF object, for which the .got section acts like the
3447 AIX .toc section. */
8da6118f
KH		 3448 case (int) R_PPC_TOC16: /* phony GOT16 relocations */
3449 BFD_ASSERT (sec != (asection *) 0);
252b5132
RH		 3450 BFD_ASSERT (bfd_is_und_section (sec)
3451 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
3452 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)
3453
3454 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
3455 break;
3456
8da6118f 3457 case (int) R_PPC_PLTREL24:
252b5132
RH		 3458 /* Relocation is to the entry for this symbol in the
3459 procedure linkage table. */
3460 BFD_ASSERT (h != NULL);
3461
3462 if (h->plt.offset == (bfd_vma) -1
3463 || splt == NULL)
3464 {
3465 /* We didn't make a PLT entry for this symbol. This
3466 happens when statically linking PIC code, or when
3467 using -Bsymbolic. */
3468 break;
3469 }
3470
3471 relocation = (splt->output_section->vma
3472 + splt->output_offset
3473 + h->plt.offset);
8da6118f 3474 break;
252b5132
RH		 3475
3476 /* relocate against _SDA_BASE_ */
8da6118f 3477 case (int) R_PPC_SDAREL16:
252b5132
RH		 3478 {
3479 const char *name;
3480
8da6118f 3481 BFD_ASSERT (sec != (asection *) 0);
252b5132 3482 name = bfd_get_section_name (abfd, sec->output_section);
5f819128
AM		 3483 if (! ((strncmp (name, ".sdata", 6) == 0
3484 && (name[6] == 0 || name[6] == '.'))
3485 || (strncmp (name, ".sbss", 5) == 0
3486 && (name[5] == 0 || name[5] == '.'))))
252b5132
RH		 3487 {
3488 (*_bfd_error_handler) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
8f615d07 3489 bfd_archive_filename (input_bfd),
252b5132 3490 sym_name,
8da6118f 3491 ppc_elf_howto_table[(int) r_type]->name,
252b5132
RH		 3492 name);
3493 }
3494 addend -= (sdata->sym_hash->root.u.def.value
3495 + sdata->sym_hash->root.u.def.section->output_section->vma
3496 + sdata->sym_hash->root.u.def.section->output_offset);
3497 }
3498 break;
3499
252b5132 3500 /* relocate against _SDA2_BASE_ */
8da6118f 3501 case (int) R_PPC_EMB_SDA2REL:
252b5132
RH		 3502 {
3503 const char *name;
3504
8da6118f 3505 BFD_ASSERT (sec != (asection *) 0);
252b5132 3506 name = bfd_get_section_name (abfd, sec->output_section);
5f819128
AM		 3507 if (! (strncmp (name, ".sdata2", 7) == 0
3508 || strncmp (name, ".sbss2", 6) == 0))
252b5132
RH		 3509 {
3510 (*_bfd_error_handler) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
8f615d07 3511 bfd_archive_filename (input_bfd),
252b5132 3512 sym_name,
8da6118f 3513 ppc_elf_howto_table[(int) r_type]->name,
252b5132 3514 name);
c3668558 3515
252b5132
RH		 3516 bfd_set_error (bfd_error_bad_value);
3517 ret = false;
3518 continue;
3519 }
3520 addend -= (sdata2->sym_hash->root.u.def.value
3521 + sdata2->sym_hash->root.u.def.section->output_section->vma
3522 + sdata2->sym_hash->root.u.def.section->output_offset);
3523 }
3524 break;
3525
252b5132 3526 /* relocate against either _SDA_BASE_, _SDA2_BASE_, or 0 */
8da6118f
KH		 3527 case (int) R_PPC_EMB_SDA21:
3528 case (int) R_PPC_EMB_RELSDA:
252b5132
RH		 3529 {
3530 const char *name;
3531 int reg;
3532
8da6118f 3533 BFD_ASSERT (sec != (asection *) 0);
252b5132 3534 name = bfd_get_section_name (abfd, sec->output_section);
5f819128
AM		 3535 if (((strncmp (name, ".sdata", 6) == 0
3536 && (name[6] == 0 || name[6] == '.'))
3537 || (strncmp (name, ".sbss", 5) == 0
3538 && (name[5] == 0 || name[5] == '.'))))
252b5132
RH		 3539 {
3540 reg = 13;
3541 addend -= (sdata->sym_hash->root.u.def.value
3542 + sdata->sym_hash->root.u.def.section->output_section->vma
3543 + sdata->sym_hash->root.u.def.section->output_offset);
3544 }
3545
5f819128
AM		 3546 else if (strncmp (name, ".sdata2", 7) == 0
3547 || strncmp (name, ".sbss2", 6) == 0)
252b5132
RH		 3548 {
3549 reg = 2;
3550 addend -= (sdata2->sym_hash->root.u.def.value
3551 + sdata2->sym_hash->root.u.def.section->output_section->vma
3552 + sdata2->sym_hash->root.u.def.section->output_offset);
3553 }
3554
8da6118f
KH		 3555 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
3556 || strcmp (name, ".PPC.EMB.sbss0") == 0)
252b5132
RH		 3557 {
3558 reg = 0;
3559 }
3560
3561 else
3562 {
3563 (*_bfd_error_handler) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
8f615d07 3564 bfd_archive_filename (input_bfd),
252b5132 3565 sym_name,
8da6118f 3566 ppc_elf_howto_table[(int) r_type]->name,
252b5132
RH		 3567 name);
3568
3569 bfd_set_error (bfd_error_bad_value);
3570 ret = false;
3571 continue;
3572 }
3573
3574 if (r_type == R_PPC_EMB_SDA21)
3575 { /* fill in register field */
3576 insn = bfd_get_32 (output_bfd, contents + offset);
3577 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
dc810e39 3578 bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
252b5132
RH		 3579 }
3580 }
3581 break;
3582
3583 /* Relocate against the beginning of the section */
8da6118f
KH		 3584 case (int) R_PPC_SECTOFF:
3585 case (int) R_PPC_SECTOFF_LO:
3586 case (int) R_PPC_SECTOFF_HI:
3587 BFD_ASSERT (sec != (asection *) 0);
252b5132
RH		 3588 addend -= sec->output_section->vma;
3589 break;
3590
8da6118f
KH		 3591 case (int) R_PPC_SECTOFF_HA:
3592 BFD_ASSERT (sec != (asection *) 0);
252b5132
RH		 3593 addend -= sec->output_section->vma;
3594 addend += ((relocation + addend) & 0x8000) << 1;
3595 break;
3596
3597 /* Negative relocations */
8da6118f
KH		 3598 case (int) R_PPC_EMB_NADDR32:
3599 case (int) R_PPC_EMB_NADDR16:
3600 case (int) R_PPC_EMB_NADDR16_LO:
3601 case (int) R_PPC_EMB_NADDR16_HI:
3602 addend -= 2 * relocation;
252b5132
RH		 3603 break;
3604
8da6118f
KH		 3605 case (int) R_PPC_EMB_NADDR16_HA:
3606 addend -= 2 * relocation;
252b5132
RH		 3607 addend += ((relocation + addend) & 0x8000) << 1;
3608 break;
3609
3610 /* NOP relocation that prevents garbage collecting linkers from omitting a
3611 reference. */
8da6118f 3612 case (int) R_PPC_EMB_MRKREF:
252b5132
RH		 3613 continue;
3614
8da6118f
KH		 3615 case (int) R_PPC_COPY:
3616 case (int) R_PPC_GLOB_DAT:
3617 case (int) R_PPC_JMP_SLOT:
3618 case (int) R_PPC_RELATIVE:
3619 case (int) R_PPC_PLT32:
3620 case (int) R_PPC_PLTREL32:
3621 case (int) R_PPC_PLT16_LO:
3622 case (int) R_PPC_PLT16_HI:
3623 case (int) R_PPC_PLT16_HA:
3624 case (int) R_PPC_EMB_RELSEC16:
3625 case (int) R_PPC_EMB_RELST_LO:
3626 case (int) R_PPC_EMB_RELST_HI:
3627 case (int) R_PPC_EMB_RELST_HA:
3628 case (int) R_PPC_EMB_BIT_FLD:
252b5132 3629 (*_bfd_error_handler) (_("%s: Relocation %s is not yet supported for symbol %s."),
8f615d07 3630 bfd_archive_filename (input_bfd),
8da6118f 3631 ppc_elf_howto_table[(int) r_type]->name,
252b5132
RH		 3632 sym_name);
3633
3634 bfd_set_error (bfd_error_invalid_operation);
3635 ret = false;
3636 continue;
3637
8da6118f
KH		 3638 case (int) R_PPC_GNU_VTINHERIT:
3639 case (int) R_PPC_GNU_VTENTRY:
252b5132
RH		 3640 /* These are no-ops in the end. */
3641 continue;
3642 }
3643
252b5132
RH		 3644#ifdef DEBUG
3645 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n",
3646 howto->name,
8da6118f 3647 (int) r_type,
252b5132
RH		 3648 sym_name,
3649 r_symndx,
8da6118f
KH		 3650 (long) offset,
3651 (long) addend);
252b5132
RH		 3652#endif
3653
3654 r = _bfd_final_link_relocate (howto,
3655 input_bfd,
3656 input_section,
3657 contents,
3658 offset,
3659 relocation,
3660 addend);
3661
dc1bc0c9
RH		 3662 if (r == bfd_reloc_ok)
3663 ;
3664 else if (r == bfd_reloc_overflow)
252b5132 3665 {
dc1bc0c9
RH		 3666 const char *name;
3667
3668 if (h != NULL)
252b5132 3669 {
dc1bc0c9
RH		 3670 if (h->root.type == bfd_link_hash_undefweak
3671 && howto->pc_relative)
3672 {
3673 /* Assume this is a call protected by other code that
3674 detect the symbol is undefined. If this is the case,
3675 we can safely ignore the overflow. If not, the
3676 program is hosed anyway, and a little warning isn't
3677 going to help. */
252b5132 3678
dc1bc0c9
RH		 3679 continue;
3680 }
252b5132 3681
dc1bc0c9
RH		 3682 name = h->root.root.string;
3683 }
3684 else
3685 {
3686 name = bfd_elf_string_from_elf_section (input_bfd,
3687 symtab_hdr->sh_link,
3688 sym->st_name);
3689 if (name == NULL)
3690 continue;
3691 if (*name == '\0')
3692 name = bfd_section_name (input_bfd, sec);
252b5132 3693 }
dc1bc0c9 3694
c3668558 3695 if (! (*info->callbacks->reloc_overflow) (info,
464e1740
ILT		 3696 name,
3697 howto->name,
3698 (bfd_vma) 0,
3699 input_bfd,
3700 input_section,
3701 offset))
3702 return false;
252b5132 3703 }
dc1bc0c9
RH		 3704 else
3705 ret = false;
252b5132
RH		 3706 }
3707
252b5132
RH		 3708#ifdef DEBUG
3709 fprintf (stderr, "\n");
3710#endif
3711
3712 return ret;
3713}
29c2fb7c
AJ		 3714
3715static enum elf_reloc_type_class
f51e552e
AM		 3716ppc_elf_reloc_type_class (rela)
3717 const Elf_Internal_Rela *rela;
29c2fb7c 3718{
f51e552e 3719 switch ((int) ELF32_R_TYPE (rela->r_info))
29c2fb7c
AJ		 3720 {
3721 case R_PPC_RELATIVE:
3722 return reloc_class_relative;
3723 case R_PPC_REL24:
3724 case R_PPC_ADDR24:
3725 case R_PPC_JMP_SLOT:
3726 return reloc_class_plt;
3727 case R_PPC_COPY:
3728 return reloc_class_copy;
3729 default:
3730 return reloc_class_normal;
3731 }
3732}
252b5132 3733\f
c5fccbec
DJ		 3734/* Support for core dump NOTE sections */
3735static boolean
3736ppc_elf_grok_prstatus (abfd, note)
3737 bfd *abfd;
3738 Elf_Internal_Note *note;
3739{
3740 int offset;
dc810e39 3741 unsigned int raw_size;
c5fccbec
DJ		 3742
3743 switch (note->descsz)
3744 {
3745 default:
3746 return false;
3747
3748 case 268: /* Linux/PPC */
3749 /* pr_cursig */
3750 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3751
3752 /* pr_pid */
3753 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3754
3755 /* pr_reg */
3756 offset = 72;
3757 raw_size = 192;
3758
3759 break;
3760 }
3761
3762 /* Make a ".reg/999" section. */
3763 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3764 raw_size, note->descpos + offset);
3765}
3766
3767static boolean
3768ppc_elf_grok_psinfo (abfd, note)
3769 bfd *abfd;
3770 Elf_Internal_Note *note;
3771{
3772 switch (note->descsz)
3773 {
3774 default:
3775 return false;
3776
3777 case 128: /* Linux/PPC elf_prpsinfo */
3778 elf_tdata (abfd)->core_program
3779 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
3780 elf_tdata (abfd)->core_command
3781 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
3782 }
3783
3784 /* Note that for some reason, a spurious space is tacked
3785 onto the end of the args in some (at least one anyway)
3786 implementations, so strip it off if it exists. */
3787
3788 {
3789 char *command = elf_tdata (abfd)->core_command;
3790 int n = strlen (command);
3791
3792 if (0 < n && command[n - 1] == ' ')
3793 command[n - 1] = '\0';
3794 }
3795
3796 return true;
3797}
3798\f
252b5132
RH		 3799#define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
3800#define TARGET_LITTLE_NAME "elf32-powerpcle"
3801#define TARGET_BIG_SYM bfd_elf32_powerpc_vec
3802#define TARGET_BIG_NAME "elf32-powerpc"
3803#define ELF_ARCH bfd_arch_powerpc
3804#define ELF_MACHINE_CODE EM_PPC
3805#define ELF_MAXPAGESIZE 0x10000
3806#define elf_info_to_howto ppc_elf_info_to_howto
3807
3808#ifdef EM_CYGNUS_POWERPC
3809#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
3810#endif
3811
3812#ifdef EM_PPC_OLD
3813#define ELF_MACHINE_ALT2 EM_PPC_OLD
3814#endif
3815
3816#define elf_backend_plt_not_loaded 1
3817#define elf_backend_got_symbol_offset 4
3818#define elf_backend_can_gc_sections 1
51b64d56 3819#define elf_backend_can_refcount 1
252b5132
RH		 3820#define elf_backend_got_header_size 12
3821#define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
b491616a 3822#define elf_backend_rela_normal 1
252b5132 3823
252b5132
RH		 3824#define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
3825#define bfd_elf32_bfd_relax_section ppc_elf_relax_section
3826#define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
3827#define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
3828#define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
3829
feee612b 3830#define elf_backend_object_p ppc_elf_object_p
252b5132
RH		 3831#define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
3832#define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
3833#define elf_backend_section_from_shdr ppc_elf_section_from_shdr
3834#define elf_backend_relocate_section ppc_elf_relocate_section
3835#define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
3836#define elf_backend_check_relocs ppc_elf_check_relocs
3837#define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
3838#define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
3839#define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
3840#define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
3841#define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
3842#define elf_backend_fake_sections ppc_elf_fake_sections
3843#define elf_backend_additional_program_headers ppc_elf_additional_program_headers
3844#define elf_backend_modify_segment_map ppc_elf_modify_segment_map
c5fccbec
DJ		 3845#define elf_backend_grok_prstatus ppc_elf_grok_prstatus
3846#define elf_backend_grok_psinfo ppc_elf_grok_psinfo
29c2fb7c 3847#define elf_backend_reloc_type_class ppc_elf_reloc_type_class
252b5132
RH		 3848
3849#include "elf32-target.h"
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