source: trunk/src/binutils/bfd/elf32-ppc.c@ 610

Last change on this file since 610 was 610, checked in by bird, 22 years ago

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1/* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
22
23/* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28#include "bfd.h"
29#include "sysdep.h"
30#include "bfdlink.h"
31#include "libbfd.h"
32#include "elf-bfd.h"
33#include "elf/ppc.h"
34#include "elf32-ppc.h"
35
36/* RELA relocations are used here. */
37
38static struct bfd_hash_entry *ppc_elf_link_hash_newfunc
39 PARAMS ((struct bfd_hash_entry *entry, struct bfd_hash_table *table,
40 const char *string));
41static struct bfd_link_hash_table *ppc_elf_link_hash_table_create
42 PARAMS ((bfd *abfd));
43static void ppc_elf_copy_indirect_symbol
44 PARAMS ((struct elf_backend_data *bed, struct elf_link_hash_entry *dir,
45 struct elf_link_hash_entry *ind));
46static reloc_howto_type *ppc_elf_reloc_type_lookup
47 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
48static void ppc_elf_info_to_howto
49 PARAMS ((bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst));
50static void ppc_elf_howto_init
51 PARAMS ((void));
52static int ppc_elf_sort_rela
53 PARAMS ((const PTR, const PTR));
54static bfd_boolean ppc_elf_relax_section
55 PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
56static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
57 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
58static bfd_reloc_status_type ppc_elf_unhandled_reloc
59 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
60static bfd_boolean ppc_elf_object_p
61 PARAMS ((bfd *));
62static bfd_boolean ppc_elf_set_private_flags
63 PARAMS ((bfd *, flagword));
64static bfd_boolean ppc_elf_merge_private_bfd_data
65 PARAMS ((bfd *, bfd *));
66static int ppc_elf_additional_program_headers
67 PARAMS ((bfd *));
68static bfd_boolean ppc_elf_modify_segment_map
69 PARAMS ((bfd *));
70static bfd_boolean ppc_elf_create_got
71 PARAMS ((bfd *, struct bfd_link_info *));
72static bfd_boolean ppc_elf_create_dynamic_sections
73 PARAMS ((bfd *, struct bfd_link_info *));
74static bfd_boolean ppc_elf_section_from_shdr
75 PARAMS ((bfd *, Elf_Internal_Shdr *, const char *));
76static bfd_boolean ppc_elf_fake_sections
77 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
78static elf_linker_section_t *ppc_elf_create_linker_section
79 PARAMS ((bfd *abfd, struct bfd_link_info *info,
80 enum elf_linker_section_enum));
81static bfd_boolean update_local_sym_info
82 PARAMS ((bfd *, Elf_Internal_Shdr *, unsigned long, int));
83static void bad_shared_reloc
84 PARAMS ((bfd *, enum elf_ppc_reloc_type));
85static bfd_boolean ppc_elf_check_relocs
86 PARAMS ((bfd *, struct bfd_link_info *, asection *,
87 const Elf_Internal_Rela *));
88static asection *ppc_elf_gc_mark_hook
89 PARAMS ((asection *sec, struct bfd_link_info *info, Elf_Internal_Rela *rel,
90 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
91static bfd_boolean ppc_elf_gc_sweep_hook
92 PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *sec,
93 const Elf_Internal_Rela *relocs));
94static bfd_boolean ppc_elf_adjust_dynamic_symbol
95 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
96static bfd_boolean allocate_dynrelocs
97 PARAMS ((struct elf_link_hash_entry *, PTR));
98static bfd_boolean readonly_dynrelocs
99 PARAMS ((struct elf_link_hash_entry *, PTR));
100static bfd_boolean ppc_elf_size_dynamic_sections
101 PARAMS ((bfd *, struct bfd_link_info *));
102static bfd_boolean ppc_elf_relocate_section
103 PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *,
104 Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
105 asection **));
106static bfd_boolean ppc_elf_add_symbol_hook
107 PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
108 const char **, flagword *, asection **, bfd_vma *));
109static bfd_boolean ppc_elf_finish_dynamic_symbol
110 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
111 Elf_Internal_Sym *));
112static bfd_boolean ppc_elf_finish_dynamic_sections
113 PARAMS ((bfd *, struct bfd_link_info *));
114static enum elf_reloc_type_class ppc_elf_reloc_type_class
115 PARAMS ((const Elf_Internal_Rela *));
116static bfd_boolean ppc_elf_grok_prstatus
117 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
118static bfd_boolean ppc_elf_grok_psinfo
119 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
120
121/* Branch prediction bit for branch taken relocs. */
122#define BRANCH_PREDICT_BIT 0x200000
123/* Mask to set RA in memory instructions. */
124#define RA_REGISTER_MASK 0x001f0000
125/* Value to shift register by to insert RA. */
126#define RA_REGISTER_SHIFT 16
127
128/* The name of the dynamic interpreter. This is put in the .interp
129 section. */
130#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
131
132/* The size in bytes of an entry in the procedure linkage table. */
133#define PLT_ENTRY_SIZE 12
134/* The initial size of the plt reserved for the dynamic linker. */
135#define PLT_INITIAL_ENTRY_SIZE 72
136/* The size of the gap between entries in the PLT. */
137#define PLT_SLOT_SIZE 8
138/* The number of single-slot PLT entries (the rest use two slots). */
139#define PLT_NUM_SINGLE_ENTRIES 8192
140
141/* Some nop instructions. */
142#define NOP 0x60000000
143#define CROR_151515 0x4def7b82
144#define CROR_313131 0x4ffffb82
145
146/* Offset of tp and dtp pointers from start of TLS block. */
147#define TP_OFFSET 0x7000
148#define DTP_OFFSET 0x8000
149
150/* Will references to this symbol always reference the symbol
151 in this object? STV_PROTECTED is excluded from the visibility test
152 here so that function pointer comparisons work properly. Since
153 function symbols not defined in an app are set to their .plt entry,
154 it's necessary for shared libs to also reference the .plt even
155 though the symbol is really local to the shared lib. */
156#define SYMBOL_REFERENCES_LOCAL(INFO, H) \
157 ((! INFO->shared \
158 || INFO->symbolic \
159 || H->dynindx == -1 \
160 || ELF_ST_VISIBILITY (H->other) == STV_INTERNAL \
161 || ELF_ST_VISIBILITY (H->other) == STV_HIDDEN) \
162 && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
163
164/* Will _calls_ to this symbol always call the version in this object? */
165#define SYMBOL_CALLS_LOCAL(INFO, H) \
166 ((! INFO->shared \
167 || INFO->symbolic \
168 || H->dynindx == -1 \
169 || ELF_ST_VISIBILITY (H->other) != STV_DEFAULT) \
170 && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
171
172
173/* The PPC linker needs to keep track of the number of relocs that it
174 decides to copy as dynamic relocs in check_relocs for each symbol.
175 This is so that it can later discard them if they are found to be
176 unnecessary. We store the information in a field extending the
177 regular ELF linker hash table. */
178
179struct ppc_elf_dyn_relocs
180{
181 struct ppc_elf_dyn_relocs *next;
182
183 /* The input section of the reloc. */
184 asection *sec;
185
186 /* Total number of relocs copied for the input section. */
187 bfd_size_type count;
188
189 /* Number of pc-relative relocs copied for the input section. */
190 bfd_size_type pc_count;
191};
192
193/* PPC ELF linker hash entry. */
194
195struct ppc_elf_link_hash_entry
196{
197 struct elf_link_hash_entry elf;
198
199 /* Track dynamic relocs copied for this symbol. */
200 struct ppc_elf_dyn_relocs *dyn_relocs;
201
202 /* Contexts in which symbol is used in the GOT (or TOC).
203 TLS_GD .. TLS_TLS bits are or'd into the mask as the
204 corresponding relocs are encountered during check_relocs.
205 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
206 indicate the corresponding GOT entry type is not needed. */
207#define TLS_GD 1 /* GD reloc. */
208#define TLS_LD 2 /* LD reloc. */
209#define TLS_TPREL 4 /* TPREL reloc, => IE. */
210#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
211#define TLS_TLS 16 /* Any TLS reloc. */
212#define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
213 char tls_mask;
214};
215
216#define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
217
218/* PPC ELF linker hash table. */
219
220struct ppc_elf_link_hash_table
221{
222 struct elf_link_hash_table elf;
223
224 /* Short-cuts to get to dynamic linker sections. */
225 asection *got;
226 asection *relgot;
227 asection *plt;
228 asection *relplt;
229 asection *dynbss;
230 asection *relbss;
231 asection *dynsbss;
232 asection *relsbss;
233 elf_linker_section_t *sdata;
234 elf_linker_section_t *sdata2;
235
236 /* Short-cut to first output tls section. */
237 asection *tls_sec;
238
239 /* Shortcut to .__tls_get_addr. */
240 struct elf_link_hash_entry *tls_get_addr;
241
242 /* TLS local dynamic got entry handling. */
243 union {
244 bfd_signed_vma refcount;
245 bfd_vma offset;
246 } tlsld_got;
247
248 /* Small local sym to section mapping cache. */
249 struct sym_sec_cache sym_sec;
250};
251
252/* Get the PPC ELF linker hash table from a link_info structure. */
253
254#define ppc_elf_hash_table(p) \
255 ((struct ppc_elf_link_hash_table *) (p)->hash)
256
257/* Create an entry in a PPC ELF linker hash table. */
258
259static struct bfd_hash_entry *
260ppc_elf_link_hash_newfunc (entry, table, string)
261 struct bfd_hash_entry *entry;
262 struct bfd_hash_table *table;
263 const char *string;
264{
265 /* Allocate the structure if it has not already been allocated by a
266 subclass. */
267 if (entry == NULL)
268 {
269 entry = bfd_hash_allocate (table,
270 sizeof (struct ppc_elf_link_hash_entry));
271 if (entry == NULL)
272 return entry;
273 }
274
275 /* Call the allocation method of the superclass. */
276 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
277 if (entry != NULL)
278 {
279 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
280 ppc_elf_hash_entry (entry)->tls_mask = 0;
281 }
282
283 return entry;
284}
285
286/* Create a PPC ELF linker hash table. */
287
288static struct bfd_link_hash_table *
289ppc_elf_link_hash_table_create (abfd)
290 bfd *abfd;
291{
292 struct ppc_elf_link_hash_table *ret;
293
294 ret = ((struct ppc_elf_link_hash_table *)
295 bfd_malloc (sizeof (struct ppc_elf_link_hash_table)));
296 if (ret == NULL)
297 return NULL;
298
299 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
300 ppc_elf_link_hash_newfunc))
301 {
302 free (ret);
303 return NULL;
304 }
305
306 ret->got = NULL;
307 ret->relgot = NULL;
308 ret->plt = NULL;
309 ret->relplt = NULL;
310 ret->dynbss = NULL;
311 ret->relbss = NULL;
312 ret->dynsbss = NULL;
313 ret->relsbss = NULL;
314 ret->sdata = NULL;
315 ret->sdata2 = NULL;
316 ret->tls_sec = NULL;
317 ret->tls_get_addr = NULL;
318 ret->tlsld_got.refcount = 0;
319 ret->sym_sec.abfd = NULL;
320
321 return &ret->elf.root;
322}
323
324/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
325 copying dynamic variables from a shared lib into an app's dynbss
326 section, and instead use a dynamic relocation to point into the
327 shared lib. */
328#define ELIMINATE_COPY_RELOCS 1
329
330/* Copy the extra info we tack onto an elf_link_hash_entry. */
331
332static void
333ppc_elf_copy_indirect_symbol (bed, dir, ind)
334 struct elf_backend_data *bed;
335 struct elf_link_hash_entry *dir, *ind;
336{
337 struct ppc_elf_link_hash_entry *edir, *eind;
338
339 edir = (struct ppc_elf_link_hash_entry *) dir;
340 eind = (struct ppc_elf_link_hash_entry *) ind;
341
342 if (eind->dyn_relocs != NULL)
343 {
344 if (edir->dyn_relocs != NULL)
345 {
346 struct ppc_elf_dyn_relocs **pp;
347 struct ppc_elf_dyn_relocs *p;
348
349 if (ind->root.type == bfd_link_hash_indirect)
350 abort ();
351
352 /* Add reloc counts against the weak sym to the strong sym
353 list. Merge any entries against the same section. */
354 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
355 {
356 struct ppc_elf_dyn_relocs *q;
357
358 for (q = edir->dyn_relocs; q != NULL; q = q->next)
359 if (q->sec == p->sec)
360 {
361 q->pc_count += p->pc_count;
362 q->count += p->count;
363 *pp = p->next;
364 break;
365 }
366 if (q == NULL)
367 pp = &p->next;
368 }
369 *pp = edir->dyn_relocs;
370 }
371
372 edir->dyn_relocs = eind->dyn_relocs;
373 eind->dyn_relocs = NULL;
374 }
375
376 edir->tls_mask |= eind->tls_mask;
377
378 if (ELIMINATE_COPY_RELOCS
379 && ind->root.type != bfd_link_hash_indirect
380 && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
381 /* If called to transfer flags for a weakdef during processing
382 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
383 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
384 dir->elf_link_hash_flags |=
385 (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
386 | ELF_LINK_HASH_REF_REGULAR
387 | ELF_LINK_HASH_REF_REGULAR_NONWEAK));
388 else
389 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
390}
391
392
393static reloc_howto_type *ppc_elf_howto_table[(int) R_PPC_max];
394
395static reloc_howto_type ppc_elf_howto_raw[] = {
396 /* This reloc does nothing. */
397 HOWTO (R_PPC_NONE, /* type */
398 0, /* rightshift */
399 2, /* size (0 = byte, 1 = short, 2 = long) */
400 32, /* bitsize */
401 FALSE, /* pc_relative */
402 0, /* bitpos */
403 complain_overflow_bitfield, /* complain_on_overflow */
404 bfd_elf_generic_reloc, /* special_function */
405 "R_PPC_NONE", /* name */
406 FALSE, /* partial_inplace */
407 0, /* src_mask */
408 0, /* dst_mask */
409 FALSE), /* pcrel_offset */
410
411 /* A standard 32 bit relocation. */
412 HOWTO (R_PPC_ADDR32, /* type */
413 0, /* rightshift */
414 2, /* size (0 = byte, 1 = short, 2 = long) */
415 32, /* bitsize */
416 FALSE, /* pc_relative */
417 0, /* bitpos */
418 complain_overflow_bitfield, /* complain_on_overflow */
419 bfd_elf_generic_reloc, /* special_function */
420 "R_PPC_ADDR32", /* name */
421 FALSE, /* partial_inplace */
422 0, /* src_mask */
423 0xffffffff, /* dst_mask */
424 FALSE), /* pcrel_offset */
425
426 /* An absolute 26 bit branch; the lower two bits must be zero.
427 FIXME: we don't check that, we just clear them. */
428 HOWTO (R_PPC_ADDR24, /* type */
429 0, /* rightshift */
430 2, /* size (0 = byte, 1 = short, 2 = long) */
431 26, /* bitsize */
432 FALSE, /* pc_relative */
433 0, /* bitpos */
434 complain_overflow_bitfield, /* complain_on_overflow */
435 bfd_elf_generic_reloc, /* special_function */
436 "R_PPC_ADDR24", /* name */
437 FALSE, /* partial_inplace */
438 0, /* src_mask */
439 0x3fffffc, /* dst_mask */
440 FALSE), /* pcrel_offset */
441
442 /* A standard 16 bit relocation. */
443 HOWTO (R_PPC_ADDR16, /* type */
444 0, /* rightshift */
445 1, /* size (0 = byte, 1 = short, 2 = long) */
446 16, /* bitsize */
447 FALSE, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_bitfield, /* complain_on_overflow */
450 bfd_elf_generic_reloc, /* special_function */
451 "R_PPC_ADDR16", /* name */
452 FALSE, /* partial_inplace */
453 0, /* src_mask */
454 0xffff, /* dst_mask */
455 FALSE), /* pcrel_offset */
456
457 /* A 16 bit relocation without overflow. */
458 HOWTO (R_PPC_ADDR16_LO, /* type */
459 0, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont,/* complain_on_overflow */
465 bfd_elf_generic_reloc, /* special_function */
466 "R_PPC_ADDR16_LO", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* The high order 16 bits of an address. */
473 HOWTO (R_PPC_ADDR16_HI, /* type */
474 16, /* rightshift */
475 1, /* size (0 = byte, 1 = short, 2 = long) */
476 16, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_dont, /* complain_on_overflow */
480 bfd_elf_generic_reloc, /* special_function */
481 "R_PPC_ADDR16_HI", /* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0xffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 /* The high order 16 bits of an address, plus 1 if the contents of
488 the low 16 bits, treated as a signed number, is negative. */
489 HOWTO (R_PPC_ADDR16_HA, /* type */
490 16, /* rightshift */
491 1, /* size (0 = byte, 1 = short, 2 = long) */
492 16, /* bitsize */
493 FALSE, /* pc_relative */
494 0, /* bitpos */
495 complain_overflow_dont, /* complain_on_overflow */
496 ppc_elf_addr16_ha_reloc, /* special_function */
497 "R_PPC_ADDR16_HA", /* name */
498 FALSE, /* partial_inplace */
499 0, /* src_mask */
500 0xffff, /* dst_mask */
501 FALSE), /* pcrel_offset */
502
503 /* An absolute 16 bit branch; the lower two bits must be zero.
504 FIXME: we don't check that, we just clear them. */
505 HOWTO (R_PPC_ADDR14, /* type */
506 0, /* rightshift */
507 2, /* size (0 = byte, 1 = short, 2 = long) */
508 16, /* bitsize */
509 FALSE, /* pc_relative */
510 0, /* bitpos */
511 complain_overflow_bitfield, /* complain_on_overflow */
512 bfd_elf_generic_reloc, /* special_function */
513 "R_PPC_ADDR14", /* name */
514 FALSE, /* partial_inplace */
515 0, /* src_mask */
516 0xfffc, /* dst_mask */
517 FALSE), /* pcrel_offset */
518
519 /* An absolute 16 bit branch, for which bit 10 should be set to
520 indicate that the branch is expected to be taken. The lower two
521 bits must be zero. */
522 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
523 0, /* rightshift */
524 2, /* size (0 = byte, 1 = short, 2 = long) */
525 16, /* bitsize */
526 FALSE, /* pc_relative */
527 0, /* bitpos */
528 complain_overflow_bitfield, /* complain_on_overflow */
529 bfd_elf_generic_reloc, /* special_function */
530 "R_PPC_ADDR14_BRTAKEN",/* name */
531 FALSE, /* partial_inplace */
532 0, /* src_mask */
533 0xfffc, /* dst_mask */
534 FALSE), /* pcrel_offset */
535
536 /* An absolute 16 bit branch, for which bit 10 should be set to
537 indicate that the branch is not expected to be taken. The lower
538 two bits must be zero. */
539 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
540 0, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 16, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_bitfield, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_PPC_ADDR14_BRNTAKEN",/* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0xfffc, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* A relative 26 bit branch; the lower two bits must be zero. */
554 HOWTO (R_PPC_REL24, /* type */
555 0, /* rightshift */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
557 26, /* bitsize */
558 TRUE, /* pc_relative */
559 0, /* bitpos */
560 complain_overflow_signed, /* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_PPC_REL24", /* name */
563 FALSE, /* partial_inplace */
564 0, /* src_mask */
565 0x3fffffc, /* dst_mask */
566 TRUE), /* pcrel_offset */
567
568 /* A relative 16 bit branch; the lower two bits must be zero. */
569 HOWTO (R_PPC_REL14, /* type */
570 0, /* rightshift */
571 2, /* size (0 = byte, 1 = short, 2 = long) */
572 16, /* bitsize */
573 TRUE, /* pc_relative */
574 0, /* bitpos */
575 complain_overflow_signed, /* complain_on_overflow */
576 bfd_elf_generic_reloc, /* special_function */
577 "R_PPC_REL14", /* name */
578 FALSE, /* partial_inplace */
579 0, /* src_mask */
580 0xfffc, /* dst_mask */
581 TRUE), /* pcrel_offset */
582
583 /* A relative 16 bit branch. Bit 10 should be set to indicate that
584 the branch is expected to be taken. The lower two bits must be
585 zero. */
586 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
587 0, /* rightshift */
588 2, /* size (0 = byte, 1 = short, 2 = long) */
589 16, /* bitsize */
590 TRUE, /* pc_relative */
591 0, /* bitpos */
592 complain_overflow_signed, /* complain_on_overflow */
593 bfd_elf_generic_reloc, /* special_function */
594 "R_PPC_REL14_BRTAKEN", /* name */
595 FALSE, /* partial_inplace */
596 0, /* src_mask */
597 0xfffc, /* dst_mask */
598 TRUE), /* pcrel_offset */
599
600 /* A relative 16 bit branch. Bit 10 should be set to indicate that
601 the branch is not expected to be taken. The lower two bits must
602 be zero. */
603 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 16, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_signed, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL14_BRNTAKEN",/* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xfffc, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
618 symbol. */
619 HOWTO (R_PPC_GOT16, /* type */
620 0, /* rightshift */
621 1, /* size (0 = byte, 1 = short, 2 = long) */
622 16, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_signed, /* complain_on_overflow */
626 bfd_elf_generic_reloc, /* special_function */
627 "R_PPC_GOT16", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0xffff, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
634 the symbol. */
635 HOWTO (R_PPC_GOT16_LO, /* type */
636 0, /* rightshift */
637 1, /* size (0 = byte, 1 = short, 2 = long) */
638 16, /* bitsize */
639 FALSE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 bfd_elf_generic_reloc, /* special_function */
643 "R_PPC_GOT16_LO", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0xffff, /* dst_mask */
647 FALSE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
650 the symbol. */
651 HOWTO (R_PPC_GOT16_HI, /* type */
652 16, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_bitfield, /* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 "R_PPC_GOT16_HI", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
666 the symbol. */
667 HOWTO (R_PPC_GOT16_HA, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_bitfield, /* complain_on_overflow */
674 ppc_elf_addr16_ha_reloc, /* special_function */
675 "R_PPC_GOT16_HA", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_REL24, but referring to the procedure linkage table
682 entry for the symbol. */
683 HOWTO (R_PPC_PLTREL24, /* type */
684 0, /* rightshift */
685 2, /* size (0 = byte, 1 = short, 2 = long) */
686 26, /* bitsize */
687 TRUE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_signed, /* complain_on_overflow */
690 bfd_elf_generic_reloc, /* special_function */
691 "R_PPC_PLTREL24", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0x3fffffc, /* dst_mask */
695 TRUE), /* pcrel_offset */
696
697 /* This is used only by the dynamic linker. The symbol should exist
698 both in the object being run and in some shared library. The
699 dynamic linker copies the data addressed by the symbol from the
700 shared library into the object, because the object being
701 run has to have the data at some particular address. */
702 HOWTO (R_PPC_COPY, /* type */
703 0, /* rightshift */
704 2, /* size (0 = byte, 1 = short, 2 = long) */
705 32, /* bitsize */
706 FALSE, /* pc_relative */
707 0, /* bitpos */
708 complain_overflow_bitfield, /* complain_on_overflow */
709 bfd_elf_generic_reloc, /* special_function */
710 "R_PPC_COPY", /* name */
711 FALSE, /* partial_inplace */
712 0, /* src_mask */
713 0, /* dst_mask */
714 FALSE), /* pcrel_offset */
715
716 /* Like R_PPC_ADDR32, but used when setting global offset table
717 entries. */
718 HOWTO (R_PPC_GLOB_DAT, /* type */
719 0, /* rightshift */
720 2, /* size (0 = byte, 1 = short, 2 = long) */
721 32, /* bitsize */
722 FALSE, /* pc_relative */
723 0, /* bitpos */
724 complain_overflow_bitfield, /* complain_on_overflow */
725 bfd_elf_generic_reloc, /* special_function */
726 "R_PPC_GLOB_DAT", /* name */
727 FALSE, /* partial_inplace */
728 0, /* src_mask */
729 0xffffffff, /* dst_mask */
730 FALSE), /* pcrel_offset */
731
732 /* Marks a procedure linkage table entry for a symbol. */
733 HOWTO (R_PPC_JMP_SLOT, /* type */
734 0, /* rightshift */
735 2, /* size (0 = byte, 1 = short, 2 = long) */
736 32, /* bitsize */
737 FALSE, /* pc_relative */
738 0, /* bitpos */
739 complain_overflow_bitfield, /* complain_on_overflow */
740 bfd_elf_generic_reloc, /* special_function */
741 "R_PPC_JMP_SLOT", /* name */
742 FALSE, /* partial_inplace */
743 0, /* src_mask */
744 0, /* dst_mask */
745 FALSE), /* pcrel_offset */
746
747 /* Used only by the dynamic linker. When the object is run, this
748 longword is set to the load address of the object, plus the
749 addend. */
750 HOWTO (R_PPC_RELATIVE, /* type */
751 0, /* rightshift */
752 2, /* size (0 = byte, 1 = short, 2 = long) */
753 32, /* bitsize */
754 FALSE, /* pc_relative */
755 0, /* bitpos */
756 complain_overflow_bitfield, /* complain_on_overflow */
757 bfd_elf_generic_reloc, /* special_function */
758 "R_PPC_RELATIVE", /* name */
759 FALSE, /* partial_inplace */
760 0, /* src_mask */
761 0xffffffff, /* dst_mask */
762 FALSE), /* pcrel_offset */
763
764 /* Like R_PPC_REL24, but uses the value of the symbol within the
765 object rather than the final value. Normally used for
766 _GLOBAL_OFFSET_TABLE_. */
767 HOWTO (R_PPC_LOCAL24PC, /* type */
768 0, /* rightshift */
769 2, /* size (0 = byte, 1 = short, 2 = long) */
770 26, /* bitsize */
771 TRUE, /* pc_relative */
772 0, /* bitpos */
773 complain_overflow_signed, /* complain_on_overflow */
774 bfd_elf_generic_reloc, /* special_function */
775 "R_PPC_LOCAL24PC", /* name */
776 FALSE, /* partial_inplace */
777 0, /* src_mask */
778 0x3fffffc, /* dst_mask */
779 TRUE), /* pcrel_offset */
780
781 /* Like R_PPC_ADDR32, but may be unaligned. */
782 HOWTO (R_PPC_UADDR32, /* type */
783 0, /* rightshift */
784 2, /* size (0 = byte, 1 = short, 2 = long) */
785 32, /* bitsize */
786 FALSE, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_bitfield, /* complain_on_overflow */
789 bfd_elf_generic_reloc, /* special_function */
790 "R_PPC_UADDR32", /* name */
791 FALSE, /* partial_inplace */
792 0, /* src_mask */
793 0xffffffff, /* dst_mask */
794 FALSE), /* pcrel_offset */
795
796 /* Like R_PPC_ADDR16, but may be unaligned. */
797 HOWTO (R_PPC_UADDR16, /* type */
798 0, /* rightshift */
799 1, /* size (0 = byte, 1 = short, 2 = long) */
800 16, /* bitsize */
801 FALSE, /* pc_relative */
802 0, /* bitpos */
803 complain_overflow_bitfield, /* complain_on_overflow */
804 bfd_elf_generic_reloc, /* special_function */
805 "R_PPC_UADDR16", /* name */
806 FALSE, /* partial_inplace */
807 0, /* src_mask */
808 0xffff, /* dst_mask */
809 FALSE), /* pcrel_offset */
810
811 /* 32-bit PC relative */
812 HOWTO (R_PPC_REL32, /* type */
813 0, /* rightshift */
814 2, /* size (0 = byte, 1 = short, 2 = long) */
815 32, /* bitsize */
816 TRUE, /* pc_relative */
817 0, /* bitpos */
818 complain_overflow_bitfield, /* complain_on_overflow */
819 bfd_elf_generic_reloc, /* special_function */
820 "R_PPC_REL32", /* name */
821 FALSE, /* partial_inplace */
822 0, /* src_mask */
823 0xffffffff, /* dst_mask */
824 TRUE), /* pcrel_offset */
825
826 /* 32-bit relocation to the symbol's procedure linkage table.
827 FIXME: not supported. */
828 HOWTO (R_PPC_PLT32, /* type */
829 0, /* rightshift */
830 2, /* size (0 = byte, 1 = short, 2 = long) */
831 32, /* 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_PLT32", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 0, /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
843 FIXME: not supported. */
844 HOWTO (R_PPC_PLTREL32, /* type */
845 0, /* rightshift */
846 2, /* size (0 = byte, 1 = short, 2 = long) */
847 32, /* bitsize */
848 TRUE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_bitfield, /* complain_on_overflow */
851 bfd_elf_generic_reloc, /* special_function */
852 "R_PPC_PLTREL32", /* name */
853 FALSE, /* partial_inplace */
854 0, /* src_mask */
855 0, /* dst_mask */
856 TRUE), /* pcrel_offset */
857
858 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
859 the symbol. */
860 HOWTO (R_PPC_PLT16_LO, /* type */
861 0, /* rightshift */
862 1, /* size (0 = byte, 1 = short, 2 = long) */
863 16, /* bitsize */
864 FALSE, /* pc_relative */
865 0, /* bitpos */
866 complain_overflow_dont, /* complain_on_overflow */
867 bfd_elf_generic_reloc, /* special_function */
868 "R_PPC_PLT16_LO", /* name */
869 FALSE, /* partial_inplace */
870 0, /* src_mask */
871 0xffff, /* dst_mask */
872 FALSE), /* pcrel_offset */
873
874 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
875 the symbol. */
876 HOWTO (R_PPC_PLT16_HI, /* type */
877 16, /* rightshift */
878 1, /* size (0 = byte, 1 = short, 2 = long) */
879 16, /* bitsize */
880 FALSE, /* pc_relative */
881 0, /* bitpos */
882 complain_overflow_bitfield, /* complain_on_overflow */
883 bfd_elf_generic_reloc, /* special_function */
884 "R_PPC_PLT16_HI", /* name */
885 FALSE, /* partial_inplace */
886 0, /* src_mask */
887 0xffff, /* dst_mask */
888 FALSE), /* pcrel_offset */
889
890 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
891 the symbol. */
892 HOWTO (R_PPC_PLT16_HA, /* type */
893 16, /* rightshift */
894 1, /* size (0 = byte, 1 = short, 2 = long) */
895 16, /* bitsize */
896 FALSE, /* pc_relative */
897 0, /* bitpos */
898 complain_overflow_bitfield, /* complain_on_overflow */
899 ppc_elf_addr16_ha_reloc, /* special_function */
900 "R_PPC_PLT16_HA", /* name */
901 FALSE, /* partial_inplace */
902 0, /* src_mask */
903 0xffff, /* dst_mask */
904 FALSE), /* pcrel_offset */
905
906 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
907 small data items. */
908 HOWTO (R_PPC_SDAREL16, /* type */
909 0, /* rightshift */
910 1, /* size (0 = byte, 1 = short, 2 = long) */
911 16, /* bitsize */
912 FALSE, /* pc_relative */
913 0, /* bitpos */
914 complain_overflow_signed, /* complain_on_overflow */
915 bfd_elf_generic_reloc, /* special_function */
916 "R_PPC_SDAREL16", /* name */
917 FALSE, /* partial_inplace */
918 0, /* src_mask */
919 0xffff, /* dst_mask */
920 FALSE), /* pcrel_offset */
921
922 /* 16-bit section relative relocation. */
923 HOWTO (R_PPC_SECTOFF, /* type */
924 0, /* rightshift */
925 1, /* size (0 = byte, 1 = short, 2 = long) */
926 16, /* bitsize */
927 FALSE, /* pc_relative */
928 0, /* bitpos */
929 complain_overflow_bitfield, /* complain_on_overflow */
930 bfd_elf_generic_reloc, /* special_function */
931 "R_PPC_SECTOFF", /* name */
932 FALSE, /* partial_inplace */
933 0, /* src_mask */
934 0xffff, /* dst_mask */
935 FALSE), /* pcrel_offset */
936
937 /* 16-bit lower half section relative relocation. */
938 HOWTO (R_PPC_SECTOFF_LO, /* type */
939 0, /* rightshift */
940 1, /* size (0 = byte, 1 = short, 2 = long) */
941 16, /* bitsize */
942 FALSE, /* pc_relative */
943 0, /* bitpos */
944 complain_overflow_dont, /* complain_on_overflow */
945 bfd_elf_generic_reloc, /* special_function */
946 "R_PPC_SECTOFF_LO", /* name */
947 FALSE, /* partial_inplace */
948 0, /* src_mask */
949 0xffff, /* dst_mask */
950 FALSE), /* pcrel_offset */
951
952 /* 16-bit upper half section relative relocation. */
953 HOWTO (R_PPC_SECTOFF_HI, /* type */
954 16, /* rightshift */
955 1, /* size (0 = byte, 1 = short, 2 = long) */
956 16, /* bitsize */
957 FALSE, /* pc_relative */
958 0, /* bitpos */
959 complain_overflow_bitfield, /* complain_on_overflow */
960 bfd_elf_generic_reloc, /* special_function */
961 "R_PPC_SECTOFF_HI", /* name */
962 FALSE, /* partial_inplace */
963 0, /* src_mask */
964 0xffff, /* dst_mask */
965 FALSE), /* pcrel_offset */
966
967 /* 16-bit upper half adjusted section relative relocation. */
968 HOWTO (R_PPC_SECTOFF_HA, /* type */
969 16, /* rightshift */
970 1, /* size (0 = byte, 1 = short, 2 = long) */
971 16, /* bitsize */
972 FALSE, /* pc_relative */
973 0, /* bitpos */
974 complain_overflow_bitfield, /* complain_on_overflow */
975 ppc_elf_addr16_ha_reloc, /* special_function */
976 "R_PPC_SECTOFF_HA", /* name */
977 FALSE, /* partial_inplace */
978 0, /* src_mask */
979 0xffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
981
982 /* Marker reloc for TLS. */
983 HOWTO (R_PPC_TLS,
984 0, /* rightshift */
985 2, /* size (0 = byte, 1 = short, 2 = long) */
986 32, /* bitsize */
987 FALSE, /* pc_relative */
988 0, /* bitpos */
989 complain_overflow_dont, /* complain_on_overflow */
990 bfd_elf_generic_reloc, /* special_function */
991 "R_PPC_TLS", /* name */
992 FALSE, /* partial_inplace */
993 0, /* src_mask */
994 0, /* dst_mask */
995 FALSE), /* pcrel_offset */
996
997 /* Computes the load module index of the load module that contains the
998 definition of its TLS sym. */
999 HOWTO (R_PPC_DTPMOD32,
1000 0, /* rightshift */
1001 2, /* size (0 = byte, 1 = short, 2 = long) */
1002 32, /* bitsize */
1003 FALSE, /* pc_relative */
1004 0, /* bitpos */
1005 complain_overflow_dont, /* complain_on_overflow */
1006 ppc_elf_unhandled_reloc, /* special_function */
1007 "R_PPC_DTPMOD32", /* name */
1008 FALSE, /* partial_inplace */
1009 0, /* src_mask */
1010 0xffffffff, /* dst_mask */
1011 FALSE), /* pcrel_offset */
1012
1013 /* Computes a dtv-relative displacement, the difference between the value
1014 of sym+add and the base address of the thread-local storage block that
1015 contains the definition of sym, minus 0x8000. */
1016 HOWTO (R_PPC_DTPREL32,
1017 0, /* rightshift */
1018 2, /* size (0 = byte, 1 = short, 2 = long) */
1019 32, /* bitsize */
1020 FALSE, /* pc_relative */
1021 0, /* bitpos */
1022 complain_overflow_dont, /* complain_on_overflow */
1023 ppc_elf_unhandled_reloc, /* special_function */
1024 "R_PPC_DTPREL32", /* name */
1025 FALSE, /* partial_inplace */
1026 0, /* src_mask */
1027 0xffffffff, /* dst_mask */
1028 FALSE), /* pcrel_offset */
1029
1030 /* A 16 bit dtprel reloc. */
1031 HOWTO (R_PPC_DTPREL16,
1032 0, /* rightshift */
1033 1, /* size (0 = byte, 1 = short, 2 = long) */
1034 16, /* bitsize */
1035 FALSE, /* pc_relative */
1036 0, /* bitpos */
1037 complain_overflow_signed, /* complain_on_overflow */
1038 ppc_elf_unhandled_reloc, /* special_function */
1039 "R_PPC_DTPREL16", /* name */
1040 FALSE, /* partial_inplace */
1041 0, /* src_mask */
1042 0xffff, /* dst_mask */
1043 FALSE), /* pcrel_offset */
1044
1045 /* Like DTPREL16, but no overflow. */
1046 HOWTO (R_PPC_DTPREL16_LO,
1047 0, /* rightshift */
1048 1, /* size (0 = byte, 1 = short, 2 = long) */
1049 16, /* bitsize */
1050 FALSE, /* pc_relative */
1051 0, /* bitpos */
1052 complain_overflow_dont, /* complain_on_overflow */
1053 ppc_elf_unhandled_reloc, /* special_function */
1054 "R_PPC_DTPREL16_LO", /* name */
1055 FALSE, /* partial_inplace */
1056 0, /* src_mask */
1057 0xffff, /* dst_mask */
1058 FALSE), /* pcrel_offset */
1059
1060 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1061 HOWTO (R_PPC_DTPREL16_HI,
1062 16, /* rightshift */
1063 1, /* size (0 = byte, 1 = short, 2 = long) */
1064 16, /* bitsize */
1065 FALSE, /* pc_relative */
1066 0, /* bitpos */
1067 complain_overflow_dont, /* complain_on_overflow */
1068 ppc_elf_unhandled_reloc, /* special_function */
1069 "R_PPC_DTPREL16_HI", /* name */
1070 FALSE, /* partial_inplace */
1071 0, /* src_mask */
1072 0xffff, /* dst_mask */
1073 FALSE), /* pcrel_offset */
1074
1075 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1076 HOWTO (R_PPC_DTPREL16_HA,
1077 16, /* rightshift */
1078 1, /* size (0 = byte, 1 = short, 2 = long) */
1079 16, /* bitsize */
1080 FALSE, /* pc_relative */
1081 0, /* bitpos */
1082 complain_overflow_dont, /* complain_on_overflow */
1083 ppc_elf_unhandled_reloc, /* special_function */
1084 "R_PPC_DTPREL16_HA", /* name */
1085 FALSE, /* partial_inplace */
1086 0, /* src_mask */
1087 0xffff, /* dst_mask */
1088 FALSE), /* pcrel_offset */
1089
1090 /* Computes a tp-relative displacement, the difference between the value of
1091 sym+add and the value of the thread pointer (r13). */
1092 HOWTO (R_PPC_TPREL32,
1093 0, /* rightshift */
1094 2, /* size (0 = byte, 1 = short, 2 = long) */
1095 32, /* bitsize */
1096 FALSE, /* pc_relative */
1097 0, /* bitpos */
1098 complain_overflow_dont, /* complain_on_overflow */
1099 ppc_elf_unhandled_reloc, /* special_function */
1100 "R_PPC_TPREL32", /* name */
1101 FALSE, /* partial_inplace */
1102 0, /* src_mask */
1103 0xffffffff, /* dst_mask */
1104 FALSE), /* pcrel_offset */
1105
1106 /* A 16 bit tprel reloc. */
1107 HOWTO (R_PPC_TPREL16,
1108 0, /* rightshift */
1109 1, /* size (0 = byte, 1 = short, 2 = long) */
1110 16, /* bitsize */
1111 FALSE, /* pc_relative */
1112 0, /* bitpos */
1113 complain_overflow_signed, /* complain_on_overflow */
1114 ppc_elf_unhandled_reloc, /* special_function */
1115 "R_PPC_TPREL16", /* name */
1116 FALSE, /* partial_inplace */
1117 0, /* src_mask */
1118 0xffff, /* dst_mask */
1119 FALSE), /* pcrel_offset */
1120
1121 /* Like TPREL16, but no overflow. */
1122 HOWTO (R_PPC_TPREL16_LO,
1123 0, /* rightshift */
1124 1, /* size (0 = byte, 1 = short, 2 = long) */
1125 16, /* bitsize */
1126 FALSE, /* pc_relative */
1127 0, /* bitpos */
1128 complain_overflow_dont, /* complain_on_overflow */
1129 ppc_elf_unhandled_reloc, /* special_function */
1130 "R_PPC_TPREL16_LO", /* name */
1131 FALSE, /* partial_inplace */
1132 0, /* src_mask */
1133 0xffff, /* dst_mask */
1134 FALSE), /* pcrel_offset */
1135
1136 /* Like TPREL16_LO, but next higher group of 16 bits. */
1137 HOWTO (R_PPC_TPREL16_HI,
1138 16, /* rightshift */
1139 1, /* size (0 = byte, 1 = short, 2 = long) */
1140 16, /* bitsize */
1141 FALSE, /* pc_relative */
1142 0, /* bitpos */
1143 complain_overflow_dont, /* complain_on_overflow */
1144 ppc_elf_unhandled_reloc, /* special_function */
1145 "R_PPC_TPREL16_HI", /* name */
1146 FALSE, /* partial_inplace */
1147 0, /* src_mask */
1148 0xffff, /* dst_mask */
1149 FALSE), /* pcrel_offset */
1150
1151 /* Like TPREL16_HI, but adjust for low 16 bits. */
1152 HOWTO (R_PPC_TPREL16_HA,
1153 16, /* rightshift */
1154 1, /* size (0 = byte, 1 = short, 2 = long) */
1155 16, /* bitsize */
1156 FALSE, /* pc_relative */
1157 0, /* bitpos */
1158 complain_overflow_dont, /* complain_on_overflow */
1159 ppc_elf_unhandled_reloc, /* special_function */
1160 "R_PPC_TPREL16_HA", /* name */
1161 FALSE, /* partial_inplace */
1162 0, /* src_mask */
1163 0xffff, /* dst_mask */
1164 FALSE), /* pcrel_offset */
1165
1166 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1167 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1168 to the first entry. */
1169 HOWTO (R_PPC_GOT_TLSGD16,
1170 0, /* rightshift */
1171 1, /* size (0 = byte, 1 = short, 2 = long) */
1172 16, /* bitsize */
1173 FALSE, /* pc_relative */
1174 0, /* bitpos */
1175 complain_overflow_signed, /* complain_on_overflow */
1176 ppc_elf_unhandled_reloc, /* special_function */
1177 "R_PPC_GOT_TLSGD16", /* name */
1178 FALSE, /* partial_inplace */
1179 0, /* src_mask */
1180 0xffff, /* dst_mask */
1181 FALSE), /* pcrel_offset */
1182
1183 /* Like GOT_TLSGD16, but no overflow. */
1184 HOWTO (R_PPC_GOT_TLSGD16_LO,
1185 0, /* rightshift */
1186 1, /* size (0 = byte, 1 = short, 2 = long) */
1187 16, /* bitsize */
1188 FALSE, /* pc_relative */
1189 0, /* bitpos */
1190 complain_overflow_dont, /* complain_on_overflow */
1191 ppc_elf_unhandled_reloc, /* special_function */
1192 "R_PPC_GOT_TLSGD16_LO", /* name */
1193 FALSE, /* partial_inplace */
1194 0, /* src_mask */
1195 0xffff, /* dst_mask */
1196 FALSE), /* pcrel_offset */
1197
1198 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1199 HOWTO (R_PPC_GOT_TLSGD16_HI,
1200 16, /* rightshift */
1201 1, /* size (0 = byte, 1 = short, 2 = long) */
1202 16, /* bitsize */
1203 FALSE, /* pc_relative */
1204 0, /* bitpos */
1205 complain_overflow_dont, /* complain_on_overflow */
1206 ppc_elf_unhandled_reloc, /* special_function */
1207 "R_PPC_GOT_TLSGD16_HI", /* name */
1208 FALSE, /* partial_inplace */
1209 0, /* src_mask */
1210 0xffff, /* dst_mask */
1211 FALSE), /* pcrel_offset */
1212
1213 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1214 HOWTO (R_PPC_GOT_TLSGD16_HA,
1215 16, /* rightshift */
1216 1, /* size (0 = byte, 1 = short, 2 = long) */
1217 16, /* bitsize */
1218 FALSE, /* pc_relative */
1219 0, /* bitpos */
1220 complain_overflow_dont, /* complain_on_overflow */
1221 ppc_elf_unhandled_reloc, /* special_function */
1222 "R_PPC_GOT_TLSGD16_HA", /* name */
1223 FALSE, /* partial_inplace */
1224 0, /* src_mask */
1225 0xffff, /* dst_mask */
1226 FALSE), /* pcrel_offset */
1227
1228 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1229 with values (sym+add)@dtpmod and zero, and computes the offset to the
1230 first entry. */
1231 HOWTO (R_PPC_GOT_TLSLD16,
1232 0, /* rightshift */
1233 1, /* size (0 = byte, 1 = short, 2 = long) */
1234 16, /* bitsize */
1235 FALSE, /* pc_relative */
1236 0, /* bitpos */
1237 complain_overflow_signed, /* complain_on_overflow */
1238 ppc_elf_unhandled_reloc, /* special_function */
1239 "R_PPC_GOT_TLSLD16", /* name */
1240 FALSE, /* partial_inplace */
1241 0, /* src_mask */
1242 0xffff, /* dst_mask */
1243 FALSE), /* pcrel_offset */
1244
1245 /* Like GOT_TLSLD16, but no overflow. */
1246 HOWTO (R_PPC_GOT_TLSLD16_LO,
1247 0, /* rightshift */
1248 1, /* size (0 = byte, 1 = short, 2 = long) */
1249 16, /* bitsize */
1250 FALSE, /* pc_relative */
1251 0, /* bitpos */
1252 complain_overflow_dont, /* complain_on_overflow */
1253 ppc_elf_unhandled_reloc, /* special_function */
1254 "R_PPC_GOT_TLSLD16_LO", /* name */
1255 FALSE, /* partial_inplace */
1256 0, /* src_mask */
1257 0xffff, /* dst_mask */
1258 FALSE), /* pcrel_offset */
1259
1260 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1261 HOWTO (R_PPC_GOT_TLSLD16_HI,
1262 16, /* rightshift */
1263 1, /* size (0 = byte, 1 = short, 2 = long) */
1264 16, /* bitsize */
1265 FALSE, /* pc_relative */
1266 0, /* bitpos */
1267 complain_overflow_dont, /* complain_on_overflow */
1268 ppc_elf_unhandled_reloc, /* special_function */
1269 "R_PPC_GOT_TLSLD16_HI", /* name */
1270 FALSE, /* partial_inplace */
1271 0, /* src_mask */
1272 0xffff, /* dst_mask */
1273 FALSE), /* pcrel_offset */
1274
1275 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1276 HOWTO (R_PPC_GOT_TLSLD16_HA,
1277 16, /* rightshift */
1278 1, /* size (0 = byte, 1 = short, 2 = long) */
1279 16, /* bitsize */
1280 FALSE, /* pc_relative */
1281 0, /* bitpos */
1282 complain_overflow_dont, /* complain_on_overflow */
1283 ppc_elf_unhandled_reloc, /* special_function */
1284 "R_PPC_GOT_TLSLD16_HA", /* name */
1285 FALSE, /* partial_inplace */
1286 0, /* src_mask */
1287 0xffff, /* dst_mask */
1288 FALSE), /* pcrel_offset */
1289
1290 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1291 the offset to the entry. */
1292 HOWTO (R_PPC_GOT_DTPREL16,
1293 0, /* rightshift */
1294 1, /* size (0 = byte, 1 = short, 2 = long) */
1295 16, /* bitsize */
1296 FALSE, /* pc_relative */
1297 0, /* bitpos */
1298 complain_overflow_signed, /* complain_on_overflow */
1299 ppc_elf_unhandled_reloc, /* special_function */
1300 "R_PPC_GOT_DTPREL16", /* name */
1301 FALSE, /* partial_inplace */
1302 0, /* src_mask */
1303 0xffff, /* dst_mask */
1304 FALSE), /* pcrel_offset */
1305
1306 /* Like GOT_DTPREL16, but no overflow. */
1307 HOWTO (R_PPC_GOT_DTPREL16_LO,
1308 0, /* rightshift */
1309 1, /* size (0 = byte, 1 = short, 2 = long) */
1310 16, /* bitsize */
1311 FALSE, /* pc_relative */
1312 0, /* bitpos */
1313 complain_overflow_dont, /* complain_on_overflow */
1314 ppc_elf_unhandled_reloc, /* special_function */
1315 "R_PPC_GOT_DTPREL16_LO", /* name */
1316 FALSE, /* partial_inplace */
1317 0, /* src_mask */
1318 0xffff, /* dst_mask */
1319 FALSE), /* pcrel_offset */
1320
1321 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1322 HOWTO (R_PPC_GOT_DTPREL16_HI,
1323 16, /* rightshift */
1324 1, /* size (0 = byte, 1 = short, 2 = long) */
1325 16, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_dont, /* complain_on_overflow */
1329 ppc_elf_unhandled_reloc, /* special_function */
1330 "R_PPC_GOT_DTPREL16_HI", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0xffff, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1337 HOWTO (R_PPC_GOT_DTPREL16_HA,
1338 16, /* rightshift */
1339 1, /* size (0 = byte, 1 = short, 2 = long) */
1340 16, /* bitsize */
1341 FALSE, /* pc_relative */
1342 0, /* bitpos */
1343 complain_overflow_dont, /* complain_on_overflow */
1344 ppc_elf_unhandled_reloc, /* special_function */
1345 "R_PPC_GOT_DTPREL16_HA", /* name */
1346 FALSE, /* partial_inplace */
1347 0, /* src_mask */
1348 0xffff, /* dst_mask */
1349 FALSE), /* pcrel_offset */
1350
1351 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1352 offset to the entry. */
1353 HOWTO (R_PPC_GOT_TPREL16,
1354 0, /* rightshift */
1355 1, /* size (0 = byte, 1 = short, 2 = long) */
1356 16, /* bitsize */
1357 FALSE, /* pc_relative */
1358 0, /* bitpos */
1359 complain_overflow_signed, /* complain_on_overflow */
1360 ppc_elf_unhandled_reloc, /* special_function */
1361 "R_PPC_GOT_TPREL16", /* name */
1362 FALSE, /* partial_inplace */
1363 0, /* src_mask */
1364 0xffff, /* dst_mask */
1365 FALSE), /* pcrel_offset */
1366
1367 /* Like GOT_TPREL16, but no overflow. */
1368 HOWTO (R_PPC_GOT_TPREL16_LO,
1369 0, /* rightshift */
1370 1, /* size (0 = byte, 1 = short, 2 = long) */
1371 16, /* bitsize */
1372 FALSE, /* pc_relative */
1373 0, /* bitpos */
1374 complain_overflow_dont, /* complain_on_overflow */
1375 ppc_elf_unhandled_reloc, /* special_function */
1376 "R_PPC_GOT_TPREL16_LO", /* name */
1377 FALSE, /* partial_inplace */
1378 0, /* src_mask */
1379 0xffff, /* dst_mask */
1380 FALSE), /* pcrel_offset */
1381
1382 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1383 HOWTO (R_PPC_GOT_TPREL16_HI,
1384 16, /* rightshift */
1385 1, /* size (0 = byte, 1 = short, 2 = long) */
1386 16, /* bitsize */
1387 FALSE, /* pc_relative */
1388 0, /* bitpos */
1389 complain_overflow_dont, /* complain_on_overflow */
1390 ppc_elf_unhandled_reloc, /* special_function */
1391 "R_PPC_GOT_TPREL16_HI", /* name */
1392 FALSE, /* partial_inplace */
1393 0, /* src_mask */
1394 0xffff, /* dst_mask */
1395 FALSE), /* pcrel_offset */
1396
1397 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1398 HOWTO (R_PPC_GOT_TPREL16_HA,
1399 16, /* rightshift */
1400 1, /* size (0 = byte, 1 = short, 2 = long) */
1401 16, /* bitsize */
1402 FALSE, /* pc_relative */
1403 0, /* bitpos */
1404 complain_overflow_dont, /* complain_on_overflow */
1405 ppc_elf_unhandled_reloc, /* special_function */
1406 "R_PPC_GOT_TPREL16_HA", /* name */
1407 FALSE, /* partial_inplace */
1408 0, /* src_mask */
1409 0xffff, /* dst_mask */
1410 FALSE), /* pcrel_offset */
1411
1412 /* The remaining relocs are from the Embedded ELF ABI, and are not
1413 in the SVR4 ELF ABI. */
1414
1415 /* 32 bit value resulting from the addend minus the symbol. */
1416 HOWTO (R_PPC_EMB_NADDR32, /* type */
1417 0, /* rightshift */
1418 2, /* size (0 = byte, 1 = short, 2 = long) */
1419 32, /* bitsize */
1420 FALSE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_bitfield, /* complain_on_overflow */
1423 bfd_elf_generic_reloc, /* special_function */
1424 "R_PPC_EMB_NADDR32", /* name */
1425 FALSE, /* partial_inplace */
1426 0, /* src_mask */
1427 0xffffffff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1429
1430 /* 16 bit value resulting from the addend minus the symbol. */
1431 HOWTO (R_PPC_EMB_NADDR16, /* type */
1432 0, /* rightshift */
1433 1, /* size (0 = byte, 1 = short, 2 = long) */
1434 16, /* bitsize */
1435 FALSE, /* pc_relative */
1436 0, /* bitpos */
1437 complain_overflow_bitfield, /* complain_on_overflow */
1438 bfd_elf_generic_reloc, /* special_function */
1439 "R_PPC_EMB_NADDR16", /* name */
1440 FALSE, /* partial_inplace */
1441 0, /* src_mask */
1442 0xffff, /* dst_mask */
1443 FALSE), /* pcrel_offset */
1444
1445 /* 16 bit value resulting from the addend minus the symbol. */
1446 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1447 0, /* rightshift */
1448 1, /* size (0 = byte, 1 = short, 2 = long) */
1449 16, /* bitsize */
1450 FALSE, /* pc_relative */
1451 0, /* bitpos */
1452 complain_overflow_dont,/* complain_on_overflow */
1453 bfd_elf_generic_reloc, /* special_function */
1454 "R_PPC_EMB_ADDR16_LO", /* name */
1455 FALSE, /* partial_inplace */
1456 0, /* src_mask */
1457 0xffff, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1459
1460 /* The high order 16 bits of the addend minus the symbol. */
1461 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1462 16, /* rightshift */
1463 1, /* size (0 = byte, 1 = short, 2 = long) */
1464 16, /* bitsize */
1465 FALSE, /* pc_relative */
1466 0, /* bitpos */
1467 complain_overflow_dont, /* complain_on_overflow */
1468 bfd_elf_generic_reloc, /* special_function */
1469 "R_PPC_EMB_NADDR16_HI", /* name */
1470 FALSE, /* partial_inplace */
1471 0, /* src_mask */
1472 0xffff, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1474
1475 /* The high order 16 bits of the result of the addend minus the address,
1476 plus 1 if the contents of the low 16 bits, treated as a signed number,
1477 is negative. */
1478 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1479 16, /* rightshift */
1480 1, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 ppc_elf_addr16_ha_reloc, /* special_function */
1486 "R_PPC_EMB_NADDR16_HA", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0xffff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* 16 bit value resulting from allocating a 4 byte word to hold an
1493 address in the .sdata section, and returning the offset from
1494 _SDA_BASE_ for that relocation. */
1495 HOWTO (R_PPC_EMB_SDAI16, /* type */
1496 0, /* rightshift */
1497 1, /* size (0 = byte, 1 = short, 2 = long) */
1498 16, /* bitsize */
1499 FALSE, /* pc_relative */
1500 0, /* bitpos */
1501 complain_overflow_bitfield, /* complain_on_overflow */
1502 bfd_elf_generic_reloc, /* special_function */
1503 "R_PPC_EMB_SDAI16", /* name */
1504 FALSE, /* partial_inplace */
1505 0, /* src_mask */
1506 0xffff, /* dst_mask */
1507 FALSE), /* pcrel_offset */
1508
1509 /* 16 bit value resulting from allocating a 4 byte word to hold an
1510 address in the .sdata2 section, and returning the offset from
1511 _SDA2_BASE_ for that relocation. */
1512 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1513 0, /* rightshift */
1514 1, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_bitfield, /* complain_on_overflow */
1519 bfd_elf_generic_reloc, /* special_function */
1520 "R_PPC_EMB_SDA2I16", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1527 small data items. */
1528 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1529 0, /* rightshift */
1530 1, /* size (0 = byte, 1 = short, 2 = long) */
1531 16, /* bitsize */
1532 FALSE, /* pc_relative */
1533 0, /* bitpos */
1534 complain_overflow_signed, /* complain_on_overflow */
1535 bfd_elf_generic_reloc, /* special_function */
1536 "R_PPC_EMB_SDA2REL", /* name */
1537 FALSE, /* partial_inplace */
1538 0, /* src_mask */
1539 0xffff, /* dst_mask */
1540 FALSE), /* pcrel_offset */
1541
1542 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1543 signed offset from the appropriate base, and filling in the register
1544 field with the appropriate register (0, 2, or 13). */
1545 HOWTO (R_PPC_EMB_SDA21, /* type */
1546 0, /* rightshift */
1547 2, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_signed, /* complain_on_overflow */
1552 bfd_elf_generic_reloc, /* special_function */
1553 "R_PPC_EMB_SDA21", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Relocation not handled: R_PPC_EMB_MRKREF */
1560 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1561 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1562 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1563 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1564 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1565
1566 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1567 in the 16 bit signed offset from the appropriate base, and filling in the
1568 register field with the appropriate register (0, 2, or 13). */
1569 HOWTO (R_PPC_EMB_RELSDA, /* type */
1570 0, /* rightshift */
1571 1, /* size (0 = byte, 1 = short, 2 = long) */
1572 16, /* bitsize */
1573 TRUE, /* pc_relative */
1574 0, /* bitpos */
1575 complain_overflow_signed, /* complain_on_overflow */
1576 bfd_elf_generic_reloc, /* special_function */
1577 "R_PPC_EMB_RELSDA", /* name */
1578 FALSE, /* partial_inplace */
1579 0, /* src_mask */
1580 0xffff, /* dst_mask */
1581 FALSE), /* pcrel_offset */
1582
1583 /* GNU extension to record C++ vtable hierarchy. */
1584 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1585 0, /* rightshift */
1586 0, /* size (0 = byte, 1 = short, 2 = long) */
1587 0, /* bitsize */
1588 FALSE, /* pc_relative */
1589 0, /* bitpos */
1590 complain_overflow_dont, /* complain_on_overflow */
1591 NULL, /* special_function */
1592 "R_PPC_GNU_VTINHERIT", /* name */
1593 FALSE, /* partial_inplace */
1594 0, /* src_mask */
1595 0, /* dst_mask */
1596 FALSE), /* pcrel_offset */
1597
1598 /* GNU extension to record C++ vtable member usage. */
1599 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1600 0, /* rightshift */
1601 0, /* size (0 = byte, 1 = short, 2 = long) */
1602 0, /* bitsize */
1603 FALSE, /* pc_relative */
1604 0, /* bitpos */
1605 complain_overflow_dont, /* complain_on_overflow */
1606 NULL, /* special_function */
1607 "R_PPC_GNU_VTENTRY", /* name */
1608 FALSE, /* partial_inplace */
1609 0, /* src_mask */
1610 0, /* dst_mask */
1611 FALSE), /* pcrel_offset */
1612
1613 /* Phony reloc to handle AIX style TOC entries. */
1614 HOWTO (R_PPC_TOC16, /* type */
1615 0, /* rightshift */
1616 1, /* size (0 = byte, 1 = short, 2 = long) */
1617 16, /* bitsize */
1618 FALSE, /* pc_relative */
1619 0, /* bitpos */
1620 complain_overflow_signed, /* complain_on_overflow */
1621 bfd_elf_generic_reloc, /* special_function */
1622 "R_PPC_TOC16", /* name */
1623 FALSE, /* partial_inplace */
1624 0, /* src_mask */
1625 0xffff, /* dst_mask */
1626 FALSE), /* pcrel_offset */
1627};
1628
1629
1630/* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1631
1632static void
1633ppc_elf_howto_init ()
1634{
1635 unsigned int i, type;
1636
1637 for (i = 0;
1638 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1639 i++)
1640 {
1641 type = ppc_elf_howto_raw[i].type;
1642 if (type >= (sizeof (ppc_elf_howto_table)
1643 / sizeof (ppc_elf_howto_table[0])))
1644 abort ();
1645 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1646 }
1647}
1648
1649
1650/* This function handles relaxing for the PPC with option --mpc860c0[=<n>].
1651
1652 The MPC860, revision C0 or earlier contains a bug in the die.
1653 If all of the following conditions are true, the next instruction
1654 to be executed *may* be treated as a no-op.
1655 1/ A forward branch is executed.
1656 2/ The branch is predicted as not taken.
1657 3/ The branch is taken.
1658 4/ The branch is located in the last 5 words of a page.
1659 (The EOP limit is 5 by default but may be specified as any value
1660 from 1-10.)
1661
1662 Our software solution is to detect these problematic branches in a
1663 linker pass and modify them as follows:
1664 1/ Unconditional branches - Since these are always predicted taken,
1665 there is no problem and no action is required.
1666 2/ Conditional backward branches - No problem, no action required.
1667 3/ Conditional forward branches - Ensure that the "inverse prediction
1668 bit" is set (ensure it is predicted taken).
1669 4/ Conditional register branches - Ensure that the "y bit" is set
1670 (ensure it is predicted taken). */
1671
1672/* Sort sections by address. */
1673
1674static int
1675ppc_elf_sort_rela (arg1, arg2)
1676 const PTR arg1;
1677 const PTR arg2;
1678{
1679 const Elf_Internal_Rela **rela1 = (const Elf_Internal_Rela**) arg1;
1680 const Elf_Internal_Rela **rela2 = (const Elf_Internal_Rela**) arg2;
1681
1682 /* Sort by offset. */
1683 return ((*rela1)->r_offset - (*rela2)->r_offset);
1684}
1685
1686static bfd_boolean
1687ppc_elf_relax_section (abfd, isec, link_info, again)
1688 bfd *abfd;
1689 asection *isec;
1690 struct bfd_link_info *link_info;
1691 bfd_boolean *again;
1692{
1693#define PAGESIZE 0x1000
1694
1695 bfd_byte *contents = NULL;
1696 bfd_byte *free_contents = NULL;
1697 Elf_Internal_Rela *internal_relocs = NULL;
1698 Elf_Internal_Rela *free_relocs = NULL;
1699 Elf_Internal_Rela **rela_comb = NULL;
1700 int comb_curr, comb_count;
1701
1702 /* We never have to do this more than once per input section. */
1703 *again = FALSE;
1704
1705 /* If needed, initialize this section's cooked size. */
1706 if (isec->_cooked_size == 0)
1707 isec->_cooked_size = isec->_raw_size;
1708
1709 /* We're only interested in text sections which overlap the
1710 troublesome area at the end of a page. */
1711 if (link_info->mpc860c0 && (isec->flags & SEC_CODE) && isec->_cooked_size)
1712 {
1713 bfd_vma dot, end_page, end_section;
1714 bfd_boolean section_modified;
1715
1716 /* Get the section contents. */
1717 /* Get cached copy if it exists. */
1718 if (elf_section_data (isec)->this_hdr.contents != NULL)
1719 contents = elf_section_data (isec)->this_hdr.contents;
1720 else
1721 {
1722 /* Go get them off disk. */
1723 contents = (bfd_byte *) bfd_malloc (isec->_raw_size);
1724 if (contents == NULL)
1725 goto error_return;
1726 free_contents = contents;
1727
1728 if (! bfd_get_section_contents (abfd, isec, contents,
1729 (file_ptr) 0, isec->_raw_size))
1730 goto error_return;
1731 }
1732
1733 comb_curr = 0;
1734 comb_count = 0;
1735 if (isec->reloc_count)
1736 {
1737 unsigned n;
1738 bfd_size_type amt;
1739
1740 /* Get a copy of the native relocations. */
1741 internal_relocs
1742 = _bfd_elf32_link_read_relocs (abfd, isec, (PTR) NULL,
1743 (Elf_Internal_Rela *) NULL,
1744 link_info->keep_memory);
1745 if (internal_relocs == NULL)
1746 goto error_return;
1747 if (! link_info->keep_memory)
1748 free_relocs = internal_relocs;
1749
1750 /* Setup a faster access method for the reloc info we need. */
1751 amt = isec->reloc_count;
1752 amt *= sizeof (Elf_Internal_Rela*);
1753 rela_comb = (Elf_Internal_Rela**) bfd_malloc (amt);
1754 if (rela_comb == NULL)
1755 goto error_return;
1756 for (n = 0; n < isec->reloc_count; ++n)
1757 {
1758 long r_type;
1759
1760 r_type = ELF32_R_TYPE (internal_relocs[n].r_info);
1761 if (r_type < 0 || r_type >= (int) R_PPC_max)
1762 goto error_return;
1763
1764 /* Prologue constants are sometimes present in the ".text"
1765 sections and they can be identified by their associated
1766 relocation. We don't want to process those words and
1767 some others which can also be identified by their
1768 relocations. However, not all conditional branches will
1769 have a relocation so we will only ignore words that
1770 1) have a reloc, and 2) the reloc is not applicable to a
1771 conditional branch. The array rela_comb is built here
1772 for use in the EOP scan loop. */
1773 switch (r_type)
1774 {
1775 case R_PPC_ADDR14_BRNTAKEN:
1776 case R_PPC_REL14:
1777 case R_PPC_REL14_BRNTAKEN:
1778 /* We should check the instruction. */
1779 break;
1780 default:
1781 /* The word is not a conditional branch - ignore it. */
1782 rela_comb[comb_count++] = &internal_relocs[n];
1783 break;
1784 }
1785 }
1786 if (comb_count > 1)
1787 qsort (rela_comb, (size_t) comb_count, sizeof (int),
1788 ppc_elf_sort_rela);
1789 }
1790
1791 /* Enumerate each EOP region that overlaps this section. */
1792 end_section = isec->vma + isec->_cooked_size;
1793 dot = end_page = (isec->vma | (PAGESIZE - 1)) + 1;
1794 dot -= link_info->mpc860c0;
1795 section_modified = FALSE;
1796 /* Increment the start position if this section begins in the
1797 middle of its first EOP region. */
1798 if (dot < isec->vma)
1799 dot = isec->vma;
1800 for (;
1801 dot < end_section;
1802 dot += PAGESIZE, end_page += PAGESIZE)
1803 {
1804 /* Check each word in this EOP region. */
1805 for (; dot < end_page; dot += 4)
1806 {
1807 bfd_vma isec_offset;
1808 unsigned long insn;
1809 bfd_boolean skip, modified;
1810
1811 /* Don't process this word if there is a relocation for it
1812 and the relocation indicates the word is not a
1813 conditional branch. */
1814 skip = FALSE;
1815 isec_offset = dot - isec->vma;
1816 for (; comb_curr<comb_count; ++comb_curr)
1817 {
1818 bfd_vma r_offset;
1819
1820 r_offset = rela_comb[comb_curr]->r_offset;
1821 if (r_offset >= isec_offset)
1822 {
1823 if (r_offset == isec_offset) skip = TRUE;
1824 break;
1825 }
1826 }
1827 if (skip) continue;
1828
1829 /* Check the current word for a problematic conditional
1830 branch. */
1831#define BO0(insn) ((insn) & 0x02000000)
1832#define BO2(insn) ((insn) & 0x00800000)
1833#define BO4(insn) ((insn) & 0x00200000)
1834 insn = (unsigned long) bfd_get_32 (abfd, contents + isec_offset);
1835 modified = FALSE;
1836 if ((insn & 0xFc000000) == 0x40000000)
1837 {
1838 /* Instruction is BCx */
1839 if ((!BO0(insn) || !BO2(insn)) && !BO4(insn))
1840 {
1841 bfd_vma target;
1842
1843 /* This branch is predicted as "normal".
1844 If this is a forward branch, it is problematic. */
1845 target = insn & 0x0000Fffc;
1846 target = (target ^ 0x8000) - 0x8000;
1847 if ((insn & 0x00000002) == 0)
1848 /* Convert to abs. */
1849 target += dot;
1850 if (target > dot)
1851 {
1852 /* Set the prediction bit. */
1853 insn |= 0x00200000;
1854 modified = TRUE;
1855 }
1856 }
1857 }
1858 else if ((insn & 0xFc00Fffe) == 0x4c000420)
1859 {
1860 /* Instruction is BCCTRx. */
1861 if ((!BO0(insn) || !BO2(insn)) && !BO4(insn))
1862 {
1863 /* This branch is predicted as not-taken.
1864 If this is a forward branch, it is problematic.
1865 Since we can't tell statically if it will branch
1866 forward, always set the prediction bit. */
1867 insn |= 0x00200000;
1868 modified = TRUE;
1869 }
1870 }
1871 else if ((insn & 0xFc00Fffe) == 0x4c000020)
1872 {
1873 /* Instruction is BCLRx */
1874 if ((!BO0(insn) || !BO2(insn)) && !BO4(insn))
1875 {
1876 /* This branch is predicted as not-taken.
1877 If this is a forward branch, it is problematic.
1878 Since we can't tell statically if it will branch
1879 forward, always set the prediction bit. */
1880 insn |= 0x00200000;
1881 modified = TRUE;
1882 }
1883 }
1884#undef BO0
1885#undef BO2
1886#undef BO4
1887 if (modified)
1888 {
1889 bfd_put_32 (abfd, (bfd_vma) insn, contents + isec_offset);
1890 section_modified = TRUE;
1891 }
1892 }
1893 }
1894 if (section_modified)
1895 {
1896 elf_section_data (isec)->this_hdr.contents = contents;
1897 free_contents = NULL;
1898 }
1899 }
1900
1901 if (rela_comb != NULL)
1902 {
1903 free (rela_comb);
1904 rela_comb = NULL;
1905 }
1906
1907 if (free_relocs != NULL)
1908 {
1909 free (free_relocs);
1910 free_relocs = NULL;
1911 }
1912
1913 if (free_contents != NULL)
1914 {
1915 if (! link_info->keep_memory)
1916 free (free_contents);
1917 else
1918 {
1919 /* Cache the section contents for elf_link_input_bfd. */
1920 elf_section_data (isec)->this_hdr.contents = contents;
1921 }
1922 free_contents = NULL;
1923 }
1924
1925 return TRUE;
1926
1927 error_return:
1928 if (rela_comb != NULL)
1929 free (rela_comb);
1930 if (free_relocs != NULL)
1931 free (free_relocs);
1932 if (free_contents != NULL)
1933 free (free_contents);
1934 return FALSE;
1935}
1936
1937
1938static reloc_howto_type *
1939ppc_elf_reloc_type_lookup (abfd, code)
1940 bfd *abfd ATTRIBUTE_UNUSED;
1941 bfd_reloc_code_real_type code;
1942{
1943 enum elf_ppc_reloc_type r;
1944
1945 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1946 /* Initialize howto table if needed. */
1947 ppc_elf_howto_init ();
1948
1949 switch ((int) code)
1950 {
1951 default:
1952 return (reloc_howto_type *) NULL;
1953
1954 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1955 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1956 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1957 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1958 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1959 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1960 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1961 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1962 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1963 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1964 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1965 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1966 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1967 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1968 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1969 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1970 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1971 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1972 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1973 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1974 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1975 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1976 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1977 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1978 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1979 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1980 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1981 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1982 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1983 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1984 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1985 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1986 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1987 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1988 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1989 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1990 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1991 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1992 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1993 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1994 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1995 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1996 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1997 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1998 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1999 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
2000 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
2001 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
2002 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
2003 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
2004 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
2005 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
2006 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
2007 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
2008 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
2009 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
2010 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
2011 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
2012 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
2013 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
2014 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
2015 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
2016 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
2017 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
2018 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
2019 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
2020 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
2021 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
2022 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
2023 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
2024 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
2025 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
2026 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
2027 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
2028 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
2029 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
2030 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
2031 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
2032 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
2033 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2034 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2035 }
2036
2037 return ppc_elf_howto_table[(int) r];
2038};
2039
2040/* Set the howto pointer for a PowerPC ELF reloc. */
2041
2042static void
2043ppc_elf_info_to_howto (abfd, cache_ptr, dst)
2044 bfd *abfd ATTRIBUTE_UNUSED;
2045 arelent *cache_ptr;
2046 Elf_Internal_Rela *dst;
2047{
2048 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2049 /* Initialize howto table if needed. */
2050 ppc_elf_howto_init ();
2051
2052 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2053 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2054}
2055
2056/* Handle the R_PPC_ADDR16_HA reloc. */
2057
2058static bfd_reloc_status_type
2059ppc_elf_addr16_ha_reloc (abfd, reloc_entry, symbol, data, input_section,
2060 output_bfd, error_message)
2061 bfd *abfd ATTRIBUTE_UNUSED;
2062 arelent *reloc_entry;
2063 asymbol *symbol;
2064 PTR data ATTRIBUTE_UNUSED;
2065 asection *input_section;
2066 bfd *output_bfd;
2067 char **error_message ATTRIBUTE_UNUSED;
2068{
2069 bfd_vma relocation;
2070
2071 if (output_bfd != NULL)
2072 {
2073 reloc_entry->address += input_section->output_offset;
2074 return bfd_reloc_ok;
2075 }
2076
2077 if (reloc_entry->address > input_section->_cooked_size)
2078 return bfd_reloc_outofrange;
2079
2080 if (bfd_is_com_section (symbol->section))
2081 relocation = 0;
2082 else
2083 relocation = symbol->value;
2084
2085 relocation += symbol->section->output_section->vma;
2086 relocation += symbol->section->output_offset;
2087 relocation += reloc_entry->addend;
2088
2089 reloc_entry->addend += (relocation & 0x8000) << 1;
2090
2091 return bfd_reloc_continue;
2092}
2093
2094static bfd_reloc_status_type
2095ppc_elf_unhandled_reloc (abfd, reloc_entry, symbol, data,
2096 input_section, output_bfd, error_message)
2097 bfd *abfd;
2098 arelent *reloc_entry;
2099 asymbol *symbol;
2100 PTR data;
2101 asection *input_section;
2102 bfd *output_bfd;
2103 char **error_message;
2104{
2105 /* If this is a relocatable link (output_bfd test tells us), just
2106 call the generic function. Any adjustment will be done at final
2107 link time. */
2108 if (output_bfd != NULL)
2109 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2110 input_section, output_bfd, error_message);
2111
2112 if (error_message != NULL)
2113 {
2114 static char buf[60];
2115 sprintf (buf, "generic linker can't handle %s",
2116 reloc_entry->howto->name);
2117 *error_message = buf;
2118 }
2119 return bfd_reloc_dangerous;
2120}
2121
2122/* Fix bad default arch selected for a 32 bit input bfd when the
2123 default is 64 bit. */
2124
2125static bfd_boolean
2126ppc_elf_object_p (abfd)
2127 bfd *abfd;
2128{
2129 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2130 {
2131 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2132
2133 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2134 {
2135 /* Relies on arch after 64 bit default being 32 bit default. */
2136 abfd->arch_info = abfd->arch_info->next;
2137 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2138 }
2139 }
2140 return TRUE;
2141}
2142
2143/* Function to set whether a module needs the -mrelocatable bit set. */
2144
2145static bfd_boolean
2146ppc_elf_set_private_flags (abfd, flags)
2147 bfd *abfd;
2148 flagword flags;
2149{
2150 BFD_ASSERT (!elf_flags_init (abfd)
2151 || elf_elfheader (abfd)->e_flags == flags);
2152
2153 elf_elfheader (abfd)->e_flags = flags;
2154 elf_flags_init (abfd) = TRUE;
2155 return TRUE;
2156}
2157
2158/* Merge backend specific data from an object file to the output
2159 object file when linking. */
2160
2161static bfd_boolean
2162ppc_elf_merge_private_bfd_data (ibfd, obfd)
2163 bfd *ibfd;
2164 bfd *obfd;
2165{
2166 flagword old_flags;
2167 flagword new_flags;
2168 bfd_boolean error;
2169
2170 /* Check if we have the same endianess. */
2171 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
2172 return FALSE;
2173
2174 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2175 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2176 return TRUE;
2177
2178 new_flags = elf_elfheader (ibfd)->e_flags;
2179 old_flags = elf_elfheader (obfd)->e_flags;
2180 if (!elf_flags_init (obfd))
2181 {
2182 /* First call, no flags set. */
2183 elf_flags_init (obfd) = TRUE;
2184 elf_elfheader (obfd)->e_flags = new_flags;
2185 }
2186
2187 /* Compatible flags are ok. */
2188 else if (new_flags == old_flags)
2189 ;
2190
2191 /* Incompatible flags. */
2192 else
2193 {
2194 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
2195 to be linked with either. */
2196 error = FALSE;
2197 if ((new_flags & EF_PPC_RELOCATABLE) != 0
2198 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
2199 {
2200 error = TRUE;
2201 (*_bfd_error_handler)
2202 (_("%s: compiled with -mrelocatable and linked with modules compiled normally"),
2203 bfd_archive_filename (ibfd));
2204 }
2205 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
2206 && (old_flags & EF_PPC_RELOCATABLE) != 0)
2207 {
2208 error = TRUE;
2209 (*_bfd_error_handler)
2210 (_("%s: compiled normally and linked with modules compiled with -mrelocatable"),
2211 bfd_archive_filename (ibfd));
2212 }
2213
2214 /* The output is -mrelocatable-lib iff both the input files are. */
2215 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
2216 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
2217
2218 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
2219 but each input file is either -mrelocatable or -mrelocatable-lib. */
2220 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
2221 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
2222 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
2223 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
2224
2225 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
2226 any module uses it. */
2227 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
2228
2229 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2230 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2231
2232 /* Warn about any other mismatches. */
2233 if (new_flags != old_flags)
2234 {
2235 error = TRUE;
2236 (*_bfd_error_handler)
2237 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
2238 bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
2239 }
2240
2241 if (error)
2242 {
2243 bfd_set_error (bfd_error_bad_value);
2244 return FALSE;
2245 }
2246 }
2247
2248 return TRUE;
2249}
2250
2251
2252/* Handle a PowerPC specific section when reading an object file. This
2253 is called when elfcode.h finds a section with an unknown type. */
2254
2255static bfd_boolean
2256ppc_elf_section_from_shdr (abfd, hdr, name)
2257 bfd *abfd;
2258 Elf_Internal_Shdr *hdr;
2259 const char *name;
2260{
2261 asection *newsect;
2262 flagword flags;
2263
2264 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2265 return FALSE;
2266
2267 newsect = hdr->bfd_section;
2268 flags = bfd_get_section_flags (abfd, newsect);
2269 if (hdr->sh_flags & SHF_EXCLUDE)
2270 flags |= SEC_EXCLUDE;
2271
2272 if (hdr->sh_type == SHT_ORDERED)
2273 flags |= SEC_SORT_ENTRIES;
2274
2275 bfd_set_section_flags (abfd, newsect, flags);
2276 return TRUE;
2277}
2278
2279
2280/* Set up any other section flags and such that may be necessary. */
2281
2282static bfd_boolean
2283ppc_elf_fake_sections (abfd, shdr, asect)
2284 bfd *abfd ATTRIBUTE_UNUSED;
2285 Elf_Internal_Shdr *shdr;
2286 asection *asect;
2287{
2288 if ((asect->flags & SEC_EXCLUDE) != 0)
2289 shdr->sh_flags |= SHF_EXCLUDE;
2290
2291 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2292 shdr->sh_type = SHT_ORDERED;
2293
2294 return TRUE;
2295}
2296
2297
2298/* Create a special linker section */
2299static elf_linker_section_t *
2300ppc_elf_create_linker_section (abfd, info, which)
2301 bfd *abfd;
2302 struct bfd_link_info *info;
2303 enum elf_linker_section_enum which;
2304{
2305 bfd *dynobj = elf_hash_table (info)->dynobj;
2306 elf_linker_section_t *lsect;
2307
2308 /* Record the first bfd section that needs the special section. */
2309 if (!dynobj)
2310 dynobj = elf_hash_table (info)->dynobj = abfd;
2311
2312 /* If this is the first time, create the section. */
2313 lsect = elf_linker_section (dynobj, which);
2314 if (!lsect)
2315 {
2316 elf_linker_section_t defaults;
2317 static elf_linker_section_t zero_section;
2318
2319 defaults = zero_section;
2320 defaults.which = which;
2321 defaults.hole_written_p = FALSE;
2322 defaults.alignment = 2;
2323
2324 /* Both of these sections are (technically) created by the user
2325 putting data in them, so they shouldn't be marked
2326 SEC_LINKER_CREATED.
2327
2328 The linker creates them so it has somewhere to attach their
2329 respective symbols. In fact, if they were empty it would
2330 be OK to leave the symbol set to 0 (or any random number), because
2331 the appropriate register should never be used. */
2332 defaults.flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2333 | SEC_IN_MEMORY);
2334
2335 switch (which)
2336 {
2337 default:
2338 (*_bfd_error_handler) (_("%s: unknown special linker type %d"),
2339 bfd_get_filename (abfd),
2340 (int) which);
2341
2342 bfd_set_error (bfd_error_bad_value);
2343 return (elf_linker_section_t *) 0;
2344
2345 case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
2346 defaults.name = ".sdata";
2347 defaults.rel_name = ".rela.sdata";
2348 defaults.bss_name = ".sbss";
2349 defaults.sym_name = "_SDA_BASE_";
2350 defaults.sym_offset = 32768;
2351 break;
2352
2353 case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
2354 defaults.name = ".sdata2";
2355 defaults.rel_name = ".rela.sdata2";
2356 defaults.bss_name = ".sbss2";
2357 defaults.sym_name = "_SDA2_BASE_";
2358 defaults.sym_offset = 32768;
2359 defaults.flags |= SEC_READONLY;
2360 break;
2361 }
2362
2363 lsect = _bfd_elf_create_linker_section (abfd, info, which, &defaults);
2364 }
2365
2366 return lsect;
2367}
2368
2369
2370/* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
2371 need to bump up the number of section headers. */
2372
2373static int
2374ppc_elf_additional_program_headers (abfd)
2375 bfd *abfd;
2376{
2377 asection *s;
2378 int ret;
2379
2380 ret = 0;
2381
2382 s = bfd_get_section_by_name (abfd, ".interp");
2383 if (s != NULL)
2384 ++ret;
2385
2386 s = bfd_get_section_by_name (abfd, ".sbss2");
2387 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2388 ++ret;
2389
2390 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2391 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2392 ++ret;
2393
2394 return ret;
2395}
2396
2397/* Modify the segment map if needed. */
2398
2399static bfd_boolean
2400ppc_elf_modify_segment_map (abfd)
2401 bfd *abfd ATTRIBUTE_UNUSED;
2402{
2403 return TRUE;
2404}
2405
2406
2407/* The powerpc .got has a blrl instruction in it. Mark it executable. */
2408
2409static bfd_boolean
2410ppc_elf_create_got (abfd, info)
2411 bfd *abfd;
2412 struct bfd_link_info *info;
2413{
2414 struct ppc_elf_link_hash_table *htab;
2415 asection *s;
2416 flagword flags;
2417
2418 if (!_bfd_elf_create_got_section (abfd, info))
2419 return FALSE;
2420
2421 htab = ppc_elf_hash_table (info);
2422 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2423 if (s == NULL)
2424 abort ();
2425
2426 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2427 | SEC_LINKER_CREATED);
2428 if (!bfd_set_section_flags (abfd, s, flags))
2429 return FALSE;
2430
2431 htab->relgot = bfd_make_section (abfd, ".rela.got");
2432 if (!htab->relgot
2433 || ! bfd_set_section_flags (abfd, htab->relgot,
2434 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2435 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2436 | SEC_READONLY))
2437 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2438 return FALSE;
2439
2440 return TRUE;
2441}
2442
2443/* We have to create .dynsbss and .rela.sbss here so that they get mapped
2444 to output sections (just like _bfd_elf_create_dynamic_sections has
2445 to create .dynbss and .rela.bss). */
2446
2447static bfd_boolean
2448ppc_elf_create_dynamic_sections (abfd, info)
2449 bfd *abfd;
2450 struct bfd_link_info *info;
2451{
2452 struct ppc_elf_link_hash_table *htab;
2453 asection *s;
2454 flagword flags;
2455
2456 if (!ppc_elf_create_got (abfd, info))
2457 return FALSE;
2458
2459 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2460 return FALSE;
2461
2462 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2463 | SEC_LINKER_CREATED);
2464
2465 htab = ppc_elf_hash_table (info);
2466 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2467 htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
2468 if (s == NULL
2469 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
2470 return FALSE;
2471
2472 if (! info->shared)
2473 {
2474 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2475 htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss");
2476 if (s == NULL
2477 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
2478 || ! bfd_set_section_alignment (abfd, s, 2))
2479 return FALSE;
2480 }
2481
2482 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2483 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2484 if (s == NULL)
2485 abort ();
2486
2487 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
2488 return bfd_set_section_flags (abfd, s, flags);
2489}
2490
2491/* Adjust a symbol defined by a dynamic object and referenced by a
2492 regular object. The current definition is in some section of the
2493 dynamic object, but we're not including those sections. We have to
2494 change the definition to something the rest of the link can
2495 understand. */
2496
2497static bfd_boolean
2498ppc_elf_adjust_dynamic_symbol (info, h)
2499 struct bfd_link_info *info;
2500 struct elf_link_hash_entry *h;
2501{
2502 struct ppc_elf_link_hash_table *htab;
2503 asection *s;
2504 unsigned int power_of_two;
2505
2506#ifdef DEBUG
2507 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
2508 h->root.root.string);
2509#endif
2510
2511 /* Make sure we know what is going on here. */
2512 htab = ppc_elf_hash_table (info);
2513 BFD_ASSERT (htab->elf.dynobj != NULL
2514 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2515 || h->weakdef != NULL
2516 || ((h->elf_link_hash_flags
2517 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2518 && (h->elf_link_hash_flags
2519 & ELF_LINK_HASH_REF_REGULAR) != 0
2520 && (h->elf_link_hash_flags
2521 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2522
2523 /* Deal with function syms. */
2524 if (h->type == STT_FUNC
2525 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2526 {
2527 /* Clear procedure linkage table information for any symbol that
2528 won't need a .plt entry. */
2529 if (! htab->elf.dynamic_sections_created
2530 || SYMBOL_CALLS_LOCAL (info, h)
2531 || h->plt.refcount <= 0)
2532 {
2533 /* A PLT entry is not required/allowed when:
2534
2535 1. We are not using ld.so; because then the PLT entry
2536 can't be set up, so we can't use one.
2537
2538 2. We know for certain that a call to this symbol
2539 will go to this object.
2540
2541 3. GC has rendered the entry unused. */
2542 h->plt.offset = (bfd_vma) -1;
2543 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2544 }
2545 return TRUE;
2546 }
2547 else
2548 h->plt.offset = (bfd_vma) -1;
2549
2550 /* If this is a weak symbol, and there is a real definition, the
2551 processor independent code will have arranged for us to see the
2552 real definition first, and we can just use the same value. */
2553 if (h->weakdef != NULL)
2554 {
2555 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2556 || h->weakdef->root.type == bfd_link_hash_defweak);
2557 h->root.u.def.section = h->weakdef->root.u.def.section;
2558 h->root.u.def.value = h->weakdef->root.u.def.value;
2559 if (ELIMINATE_COPY_RELOCS)
2560 h->elf_link_hash_flags
2561 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
2562 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
2563 return TRUE;
2564 }
2565
2566 /* This is a reference to a symbol defined by a dynamic object which
2567 is not a function. */
2568
2569 /* If we are creating a shared library, we must presume that the
2570 only references to the symbol are via the global offset table.
2571 For such cases we need not do anything here; the relocations will
2572 be handled correctly by relocate_section. */
2573 if (info->shared)
2574 return TRUE;
2575
2576 /* If there are no references to this symbol that do not use the
2577 GOT, we don't need to generate a copy reloc. */
2578 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
2579 return TRUE;
2580
2581 if (ELIMINATE_COPY_RELOCS)
2582 {
2583 struct ppc_elf_dyn_relocs *p;
2584 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
2585 {
2586 s = p->sec->output_section;
2587 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2588 break;
2589 }
2590
2591 /* If we didn't find any dynamic relocs in read-only sections, then
2592 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2593 if (p == NULL)
2594 {
2595 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
2596 return TRUE;
2597 }
2598 }
2599
2600 /* We must allocate the symbol in our .dynbss section, which will
2601 become part of the .bss section of the executable. There will be
2602 an entry for this symbol in the .dynsym section. The dynamic
2603 object will contain position independent code, so all references
2604 from the dynamic object to this symbol will go through the global
2605 offset table. The dynamic linker will use the .dynsym entry to
2606 determine the address it must put in the global offset table, so
2607 both the dynamic object and the regular object will refer to the
2608 same memory location for the variable.
2609
2610 Of course, if the symbol is sufficiently small, we must instead
2611 allocate it in .sbss. FIXME: It would be better to do this if and
2612 only if there were actually SDAREL relocs for that symbol. */
2613
2614 if (h->size <= elf_gp_size (htab->elf.dynobj))
2615 s = htab->dynsbss;
2616 else
2617 s = htab->dynbss;
2618 BFD_ASSERT (s != NULL);
2619
2620 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
2621 copy the initial value out of the dynamic object and into the
2622 runtime process image. We need to remember the offset into the
2623 .rela.bss section we are going to use. */
2624 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2625 {
2626 asection *srel;
2627
2628 if (h->size <= elf_gp_size (htab->elf.dynobj))
2629 srel = htab->relsbss;
2630 else
2631 srel = htab->relbss;
2632 BFD_ASSERT (srel != NULL);
2633 srel->_raw_size += sizeof (Elf32_External_Rela);
2634 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2635 }
2636
2637 /* We need to figure out the alignment required for this symbol. I
2638 have no idea how ELF linkers handle this. */
2639 power_of_two = bfd_log2 (h->size);
2640 if (power_of_two > 4)
2641 power_of_two = 4;
2642
2643 /* Apply the required alignment. */
2644 s->_raw_size = BFD_ALIGN (s->_raw_size,
2645 (bfd_size_type) (1 << power_of_two));
2646 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
2647 {
2648 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
2649 return FALSE;
2650 }
2651
2652 /* Define the symbol as being at this point in the section. */
2653 h->root.u.def.section = s;
2654 h->root.u.def.value = s->_raw_size;
2655
2656 /* Increment the section size to make room for the symbol. */
2657 s->_raw_size += h->size;
2658
2659 return TRUE;
2660}
2661
2662
2663/* This is the condition under which finish_dynamic_symbol will be
2664 called from elflink.h. If elflink.h doesn't call our
2665 finish_dynamic_symbol routine, we'll need to do something about
2666 initializing any .plt and .got entries in relocate_section. */
2667#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2668 ((DYN) \
2669 && ((SHARED) \
2670 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
2671 && ((H)->dynindx != -1 \
2672 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
2673
2674/* Of those relocs that might be copied as dynamic relocs, this macro
2675 selects those that must be copied when linking a shared library,
2676 even when the symbol is local. */
2677
2678#define MUST_BE_DYN_RELOC(RTYPE) \
2679 ((RTYPE) != R_PPC_REL24 \
2680 && (RTYPE) != R_PPC_REL14 \
2681 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2682 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2683 && (RTYPE) != R_PPC_REL32)
2684
2685/* Allocate space in associated reloc sections for dynamic relocs. */
2686
2687static bfd_boolean
2688allocate_dynrelocs (h, inf)
2689 struct elf_link_hash_entry *h;
2690 PTR inf;
2691{
2692 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2693 struct ppc_elf_link_hash_entry *eh;
2694 struct ppc_elf_link_hash_table *htab;
2695 struct ppc_elf_dyn_relocs *p;
2696
2697 if (h->root.type == bfd_link_hash_indirect)
2698 return TRUE;
2699
2700 if (h->root.type == bfd_link_hash_warning)
2701 /* When warning symbols are created, they **replace** the "real"
2702 entry in the hash table, thus we never get to see the real
2703 symbol in a hash traversal. So look at it now. */
2704 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2705
2706 htab = ppc_elf_hash_table (info);
2707 if (htab->elf.dynamic_sections_created
2708 && h->plt.refcount > 0)
2709 {
2710 /* Make sure this symbol is output as a dynamic symbol. */
2711 if (h->dynindx == -1
2712 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
2713 {
2714 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2715 return FALSE;
2716 }
2717
2718 if (info->shared
2719 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2720 {
2721 asection *s = htab->plt;
2722
2723 /* If this is the first .plt entry, make room for the special
2724 first entry. */
2725 if (s->_raw_size == 0)
2726 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
2727
2728 /* The PowerPC PLT is actually composed of two parts, the
2729 first part is 2 words (for a load and a jump), and then
2730 there is a remaining word available at the end. */
2731 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
2732 + (PLT_SLOT_SIZE
2733 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE)
2734 / PLT_ENTRY_SIZE)));
2735
2736 /* If this symbol is not defined in a regular file, and we
2737 are not generating a shared library, then set the symbol
2738 to this location in the .plt. This is required to make
2739 function pointers compare as equal between the normal
2740 executable and the shared library. */
2741 if (! info->shared
2742 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2743 {
2744 h->root.u.def.section = s;
2745 h->root.u.def.value = h->plt.offset;
2746 }
2747
2748 /* Make room for this entry. After the 8192nd entry, room
2749 for two entries is allocated. */
2750 s->_raw_size += PLT_ENTRY_SIZE;
2751 if ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
2752 > PLT_NUM_SINGLE_ENTRIES)
2753 s->_raw_size += PLT_ENTRY_SIZE;
2754
2755 /* We also need to make an entry in the .rela.plt section. */
2756 htab->relplt->_raw_size += sizeof (Elf32_External_Rela);
2757 }
2758 else
2759 {
2760 h->plt.offset = (bfd_vma) -1;
2761 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2762 }
2763 }
2764 else
2765 {
2766 h->plt.offset = (bfd_vma) -1;
2767 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2768 }
2769
2770 eh = (struct ppc_elf_link_hash_entry *) h;
2771 if (eh->elf.got.refcount > 0)
2772 {
2773 /* Make sure this symbol is output as a dynamic symbol. */
2774 if (eh->elf.dynindx == -1
2775 && (eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
2776 {
2777 if (!bfd_elf32_link_record_dynamic_symbol (info, &eh->elf))
2778 return FALSE;
2779 }
2780
2781 if (eh->tls_mask == (TLS_TLS | TLS_LD)
2782 && !(eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
2783 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
2784 eh->elf.got.offset = (bfd_vma) -1;
2785 else
2786 {
2787 bfd_boolean dyn;
2788 eh->elf.got.offset = htab->got->_raw_size;
2789 if ((eh->tls_mask & TLS_TLS) != 0)
2790 {
2791 if ((eh->tls_mask & TLS_LD) != 0)
2792 htab->got->_raw_size += 8;
2793 if ((eh->tls_mask & TLS_GD) != 0)
2794 htab->got->_raw_size += 8;
2795 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
2796 htab->got->_raw_size += 4;
2797 if ((eh->tls_mask & TLS_DTPREL) != 0)
2798 htab->got->_raw_size += 4;
2799 }
2800 else
2801 htab->got->_raw_size += 4;
2802 dyn = htab->elf.dynamic_sections_created;
2803 if (info->shared
2804 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
2805 {
2806 /* All the entries we allocated need relocs. */
2807 htab->relgot->_raw_size
2808 += ((htab->got->_raw_size - eh->elf.got.offset) / 4
2809 * sizeof (Elf32_External_Rela));
2810 /* Except LD only needs one. */
2811 if ((eh->tls_mask & TLS_LD) != 0)
2812 htab->relgot->_raw_size -= sizeof (Elf32_External_Rela);
2813 }
2814 }
2815 }
2816 else
2817 eh->elf.got.offset = (bfd_vma) -1;
2818
2819 if (eh->dyn_relocs == NULL)
2820 return TRUE;
2821
2822 /* In the shared -Bsymbolic case, discard space allocated for
2823 dynamic pc-relative relocs against symbols which turn out to be
2824 defined in regular objects. For the normal shared case, discard
2825 space for relocs that have become local due to symbol visibility
2826 changes. */
2827 if (info->shared)
2828 {
2829 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
2830 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
2831 || info->symbolic))
2832 {
2833 struct ppc_elf_dyn_relocs **pp;
2834
2835 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2836 {
2837 p->count -= p->pc_count;
2838 p->pc_count = 0;
2839 if (p->count == 0)
2840 *pp = p->next;
2841 else
2842 pp = &p->next;
2843 }
2844 }
2845 }
2846 else if (ELIMINATE_COPY_RELOCS)
2847 {
2848 /* For the non-shared case, discard space for relocs against
2849 symbols which turn out to need copy relocs or are not
2850 dynamic. */
2851
2852 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2853 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2854 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2855 {
2856 /* Make sure this symbol is output as a dynamic symbol.
2857 Undefined weak syms won't yet be marked as dynamic. */
2858 if (h->dynindx == -1
2859 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
2860 {
2861 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
2862 return FALSE;
2863 }
2864
2865 /* If that succeeded, we know we'll be keeping all the
2866 relocs. */
2867 if (h->dynindx != -1)
2868 goto keep;
2869 }
2870
2871 eh->dyn_relocs = NULL;
2872
2873 keep: ;
2874 }
2875
2876 /* Finally, allocate space. */
2877 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2878 {
2879 asection *sreloc = elf_section_data (p->sec)->sreloc;
2880 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
2881 }
2882
2883 return TRUE;
2884}
2885
2886/* Find any dynamic relocs that apply to read-only sections. */
2887
2888static bfd_boolean
2889readonly_dynrelocs (h, info)
2890 struct elf_link_hash_entry *h;
2891 PTR info;
2892{
2893 struct ppc_elf_dyn_relocs *p;
2894
2895 if (h->root.type == bfd_link_hash_indirect)
2896 return TRUE;
2897
2898 if (h->root.type == bfd_link_hash_warning)
2899 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2900
2901 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
2902 {
2903 asection *s = p->sec->output_section;
2904
2905 if (s != NULL
2906 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
2907 == (SEC_READONLY | SEC_ALLOC)))
2908 {
2909 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
2910
2911 /* Not an error, just cut short the traversal. */
2912 return FALSE;
2913 }
2914 }
2915 return TRUE;
2916}
2917
2918/* Set the sizes of the dynamic sections. */
2919
2920static bfd_boolean
2921ppc_elf_size_dynamic_sections (output_bfd, info)
2922 bfd *output_bfd ATTRIBUTE_UNUSED;
2923 struct bfd_link_info *info;
2924{
2925 struct ppc_elf_link_hash_table *htab;
2926 asection *s;
2927 bfd_boolean relocs;
2928 bfd *ibfd;
2929
2930#ifdef DEBUG
2931 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
2932#endif
2933
2934 htab = ppc_elf_hash_table (info);
2935 BFD_ASSERT (htab->elf.dynobj != NULL);
2936
2937 if (elf_hash_table (info)->dynamic_sections_created)
2938 {
2939 /* Set the contents of the .interp section to the interpreter. */
2940 if (! info->shared)
2941 {
2942 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
2943 BFD_ASSERT (s != NULL);
2944 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
2945 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2946 }
2947 }
2948
2949 if (htab->tlsld_got.refcount > 0)
2950 {
2951 htab->tlsld_got.offset = htab->got->_raw_size;
2952 htab->got->_raw_size += 8;
2953 if (info->shared)
2954 htab->relgot->_raw_size += sizeof (Elf32_External_Rela);
2955 }
2956 else
2957 htab->tlsld_got.offset = (bfd_vma) -1;
2958
2959 /* Set up .got offsets for local syms, and space for local dynamic
2960 relocs. */
2961 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2962 {
2963 bfd_signed_vma *local_got;
2964 bfd_signed_vma *end_local_got;
2965 char *lgot_masks;
2966 bfd_size_type locsymcount;
2967 Elf_Internal_Shdr *symtab_hdr;
2968 asection *srel;
2969
2970 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2971 continue;
2972
2973 for (s = ibfd->sections; s != NULL; s = s->next)
2974 {
2975 struct ppc_elf_dyn_relocs *p;
2976
2977 for (p = ((struct ppc_elf_dyn_relocs *)
2978 elf_section_data (s)->local_dynrel);
2979 p != NULL;
2980 p = p->next)
2981 {
2982 if (!bfd_is_abs_section (p->sec)
2983 && bfd_is_abs_section (p->sec->output_section))
2984 {
2985 /* Input section has been discarded, either because
2986 it is a copy of a linkonce section or due to
2987 linker script /DISCARD/, so we'll be discarding
2988 the relocs too. */
2989 }
2990 else if (p->count != 0)
2991 {
2992 elf_section_data (p->sec)->sreloc->_raw_size
2993 += p->count * sizeof (Elf32_External_Rela);
2994 if ((p->sec->output_section->flags
2995 & (SEC_READONLY | SEC_ALLOC))
2996 == (SEC_READONLY | SEC_ALLOC))
2997 info->flags |= DF_TEXTREL;
2998 }
2999 }
3000 }
3001
3002 local_got = elf_local_got_refcounts (ibfd);
3003 if (!local_got)
3004 continue;
3005
3006 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3007 locsymcount = symtab_hdr->sh_info;
3008 end_local_got = local_got + locsymcount;
3009 lgot_masks = (char *) end_local_got;
3010 s = htab->got;
3011 srel = htab->relgot;
3012 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3013 if (*local_got > 0)
3014 {
3015 if (*lgot_masks == (TLS_TLS | TLS_LD))
3016 {
3017 /* If just an LD reloc, we'll just use
3018 htab->tlsld_got.offset. */
3019 if (htab->tlsld_got.offset == (bfd_vma) -1)
3020 {
3021 htab->tlsld_got.offset = s->_raw_size;
3022 s->_raw_size += 8;
3023 if (info->shared)
3024 srel->_raw_size += sizeof (Elf32_External_Rela);
3025 }
3026 *local_got = (bfd_vma) -1;
3027 }
3028 else
3029 {
3030 *local_got = s->_raw_size;
3031 if ((*lgot_masks & TLS_TLS) != 0)
3032 {
3033 if ((*lgot_masks & TLS_GD) != 0)
3034 s->_raw_size += 8;
3035 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
3036 s->_raw_size += 4;
3037 if ((*lgot_masks & TLS_DTPREL) != 0)
3038 s->_raw_size += 4;
3039 }
3040 else
3041 s->_raw_size += 4;
3042 if (info->shared)
3043 srel->_raw_size += ((s->_raw_size - *local_got) / 4
3044 * sizeof (Elf32_External_Rela));
3045 }
3046 }
3047 else
3048 *local_got = (bfd_vma) -1;
3049 }
3050
3051 /* Allocate space for global sym dynamic relocs. */
3052 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3053
3054 /* We've now determined the sizes of the various dynamic sections.
3055 Allocate memory for them. */
3056 relocs = FALSE;
3057 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
3058 {
3059 if ((s->flags & SEC_LINKER_CREATED) == 0)
3060 continue;
3061
3062 if (s == htab->plt
3063 || s == htab->got
3064 || (htab->sdata != NULL && s == htab->sdata->section)
3065 || (htab->sdata2 != NULL && s == htab->sdata2->section))
3066 {
3067 /* Strip this section if we don't need it; see the
3068 comment below. */
3069 }
3070 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
3071 {
3072 if (s->_raw_size == 0)
3073 {
3074 /* If we don't need this section, strip it from the
3075 output file. This is mostly to handle .rela.bss and
3076 .rela.plt. We must create both sections in
3077 create_dynamic_sections, because they must be created
3078 before the linker maps input sections to output
3079 sections. The linker does that before
3080 adjust_dynamic_symbol is called, and it is that
3081 function which decides whether anything needs to go
3082 into these sections. */
3083 }
3084 else
3085 {
3086 /* Remember whether there are any relocation sections. */
3087 relocs = TRUE;
3088
3089 /* We use the reloc_count field as a counter if we need
3090 to copy relocs into the output file. */
3091 s->reloc_count = 0;
3092 }
3093 }
3094 else
3095 {
3096 /* It's not one of our sections, so don't allocate space. */
3097 continue;
3098 }
3099
3100 if (s->_raw_size == 0)
3101 {
3102 _bfd_strip_section_from_output (info, s);
3103 continue;
3104 }
3105
3106 /* Allocate memory for the section contents. */
3107 s->contents = (bfd_byte *) bfd_zalloc (htab->elf.dynobj, s->_raw_size);
3108 if (s->contents == NULL)
3109 return FALSE;
3110 }
3111
3112 if (htab->elf.dynamic_sections_created)
3113 {
3114 /* Add some entries to the .dynamic section. We fill in the
3115 values later, in ppc_elf_finish_dynamic_sections, but we
3116 must add the entries now so that we get the correct size for
3117 the .dynamic section. The DT_DEBUG entry is filled in by the
3118 dynamic linker and used by the debugger. */
3119#define add_dynamic_entry(TAG, VAL) \
3120 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
3121
3122 if (!info->shared)
3123 {
3124 if (!add_dynamic_entry (DT_DEBUG, 0))
3125 return FALSE;
3126 }
3127
3128 if (htab->plt != NULL && htab->plt->_raw_size != 0)
3129 {
3130 if (!add_dynamic_entry (DT_PLTGOT, 0)
3131 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3132 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3133 || !add_dynamic_entry (DT_JMPREL, 0))
3134 return FALSE;
3135 }
3136
3137 if (relocs)
3138 {
3139 if (!add_dynamic_entry (DT_RELA, 0)
3140 || !add_dynamic_entry (DT_RELASZ, 0)
3141 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3142 return FALSE;
3143 }
3144
3145 /* If any dynamic relocs apply to a read-only section, then we
3146 need a DT_TEXTREL entry. */
3147 if ((info->flags & DF_TEXTREL) == 0)
3148 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
3149 (PTR) info);
3150
3151 if ((info->flags & DF_TEXTREL) != 0)
3152 {
3153 if (!add_dynamic_entry (DT_TEXTREL, 0))
3154 return FALSE;
3155 }
3156 }
3157#undef add_dynamic_entry
3158
3159 return TRUE;
3160}
3161
3162
3163static bfd_boolean
3164update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)
3165 bfd *abfd;
3166 Elf_Internal_Shdr *symtab_hdr;
3167 unsigned long r_symndx;
3168 int tls_type;
3169{
3170 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3171 char *local_got_tls_masks;
3172
3173 if (local_got_refcounts == NULL)
3174 {
3175 bfd_size_type size = symtab_hdr->sh_info;
3176
3177 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3178 local_got_refcounts = (bfd_signed_vma *) bfd_zalloc (abfd, size);
3179 if (local_got_refcounts == NULL)
3180 return FALSE;
3181 elf_local_got_refcounts (abfd) = local_got_refcounts;
3182 }
3183
3184 local_got_refcounts[r_symndx] += 1;
3185 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3186 local_got_tls_masks[r_symndx] |= tls_type;
3187 return TRUE;
3188}
3189
3190static void
3191bad_shared_reloc (abfd, r_type)
3192 bfd *abfd;
3193 enum elf_ppc_reloc_type r_type;
3194{
3195 (*_bfd_error_handler)
3196 (_("%s: relocation %s cannot be used when making a shared object"),
3197 bfd_archive_filename (abfd),
3198 ppc_elf_howto_table[(int) r_type]->name);
3199 bfd_set_error (bfd_error_bad_value);
3200}
3201
3202/* Look through the relocs for a section during the first phase, and
3203 allocate space in the global offset table or procedure linkage
3204 table. */
3205
3206static bfd_boolean
3207ppc_elf_check_relocs (abfd, info, sec, relocs)
3208 bfd *abfd;
3209 struct bfd_link_info *info;
3210 asection *sec;
3211 const Elf_Internal_Rela *relocs;
3212{
3213 struct ppc_elf_link_hash_table *htab;
3214 Elf_Internal_Shdr *symtab_hdr;
3215 struct elf_link_hash_entry **sym_hashes;
3216 const Elf_Internal_Rela *rel;
3217 const Elf_Internal_Rela *rel_end;
3218 asection *sreloc;
3219
3220 if (info->relocateable)
3221 return TRUE;
3222
3223#ifdef DEBUG
3224 fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n",
3225 bfd_get_section_name (abfd, sec),
3226 bfd_archive_filename (abfd));
3227#endif
3228
3229 /* Create the linker generated sections all the time so that the
3230 special symbols are created. */
3231
3232 htab = ppc_elf_hash_table (info);
3233 if (htab->sdata == NULL)
3234 {
3235 htab->sdata = elf_linker_section (abfd, LINKER_SECTION_SDATA);
3236 if (htab->sdata == NULL)
3237 htab->sdata = ppc_elf_create_linker_section (abfd, info,
3238 LINKER_SECTION_SDATA);
3239 if (htab->sdata == NULL)
3240 return FALSE;
3241 }
3242
3243 if (htab->sdata2 == NULL)
3244 {
3245 htab->sdata2 = elf_linker_section (abfd, LINKER_SECTION_SDATA2);
3246 if (htab->sdata2 == NULL)
3247 htab->sdata2 = ppc_elf_create_linker_section (abfd, info,
3248 LINKER_SECTION_SDATA2);
3249 if (htab->sdata2 == NULL)
3250 return FALSE;
3251 }
3252
3253 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3254 sym_hashes = elf_sym_hashes (abfd);
3255 sreloc = NULL;
3256
3257 rel_end = relocs + sec->reloc_count;
3258 for (rel = relocs; rel < rel_end; rel++)
3259 {
3260 unsigned long r_symndx;
3261 enum elf_ppc_reloc_type r_type;
3262 struct elf_link_hash_entry *h;
3263 int tls_type = 0;
3264
3265 r_symndx = ELF32_R_SYM (rel->r_info);
3266 if (r_symndx < symtab_hdr->sh_info)
3267 h = NULL;
3268 else
3269 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3270
3271 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3272 This shows up in particular in an R_PPC_ADDR32 in the eabi
3273 startup code. */
3274 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3275 {
3276 if (htab->got == NULL)
3277 {
3278 if (htab->elf.dynobj == NULL)
3279 htab->elf.dynobj = abfd;
3280 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3281 return FALSE;
3282 }
3283 }
3284
3285 r_type = (enum elf_ppc_reloc_type) ELF32_R_TYPE (rel->r_info);
3286 switch (r_type)
3287 {
3288 case R_PPC_GOT_TLSLD16:
3289 case R_PPC_GOT_TLSLD16_LO:
3290 case R_PPC_GOT_TLSLD16_HI:
3291 case R_PPC_GOT_TLSLD16_HA:
3292 htab->tlsld_got.refcount += 1;
3293 tls_type = TLS_TLS | TLS_LD;
3294 goto dogottls;
3295
3296 case R_PPC_GOT_TLSGD16:
3297 case R_PPC_GOT_TLSGD16_LO:
3298 case R_PPC_GOT_TLSGD16_HI:
3299 case R_PPC_GOT_TLSGD16_HA:
3300 tls_type = TLS_TLS | TLS_GD;
3301 goto dogottls;
3302
3303 case R_PPC_GOT_TPREL16:
3304 case R_PPC_GOT_TPREL16_LO:
3305 case R_PPC_GOT_TPREL16_HI:
3306 case R_PPC_GOT_TPREL16_HA:
3307 if (info->shared)
3308 info->flags |= DF_STATIC_TLS;
3309 tls_type = TLS_TLS | TLS_TPREL;
3310 goto dogottls;
3311
3312 case R_PPC_GOT_DTPREL16:
3313 case R_PPC_GOT_DTPREL16_LO:
3314 case R_PPC_GOT_DTPREL16_HI:
3315 case R_PPC_GOT_DTPREL16_HA:
3316 tls_type = TLS_TLS | TLS_DTPREL;
3317 dogottls:
3318 sec->has_tls_reloc = 1;
3319 /* Fall thru */
3320
3321 /* GOT16 relocations */
3322 case R_PPC_GOT16:
3323 case R_PPC_GOT16_LO:
3324 case R_PPC_GOT16_HI:
3325 case R_PPC_GOT16_HA:
3326 /* This symbol requires a global offset table entry. */
3327 if (htab->got == NULL)
3328 {
3329 if (htab->elf.dynobj == NULL)
3330 htab->elf.dynobj = abfd;
3331 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3332 return FALSE;
3333 }
3334 if (h != NULL)
3335 {
3336 h->got.refcount += 1;
3337 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3338 }
3339 else
3340 /* This is a global offset table entry for a local symbol. */
3341 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3342 return FALSE;
3343 break;
3344
3345 /* Indirect .sdata relocation. */
3346 case R_PPC_EMB_SDAI16:
3347 if (info->shared)
3348 {
3349 bad_shared_reloc (abfd, r_type);
3350 return FALSE;
3351 }
3352 if (!bfd_elf32_create_pointer_linker_section (abfd, info,
3353 htab->sdata, h, rel))
3354 return FALSE;
3355 break;
3356
3357 /* Indirect .sdata2 relocation. */
3358 case R_PPC_EMB_SDA2I16:
3359 if (info->shared)
3360 {
3361 bad_shared_reloc (abfd, r_type);
3362 return FALSE;
3363 }
3364 if (!bfd_elf32_create_pointer_linker_section (abfd, info,
3365 htab->sdata2, h, rel))
3366 return FALSE;
3367 break;
3368
3369 case R_PPC_SDAREL16:
3370 case R_PPC_EMB_SDA2REL:
3371 case R_PPC_EMB_SDA21:
3372 case R_PPC_EMB_RELSDA:
3373 case R_PPC_EMB_NADDR32:
3374 case R_PPC_EMB_NADDR16:
3375 case R_PPC_EMB_NADDR16_LO:
3376 case R_PPC_EMB_NADDR16_HI:
3377 case R_PPC_EMB_NADDR16_HA:
3378 if (info->shared)
3379 {
3380 bad_shared_reloc (abfd, r_type);
3381 return FALSE;
3382 }
3383 break;
3384
3385 case R_PPC_PLT32:
3386 case R_PPC_PLTREL24:
3387 case R_PPC_PLTREL32:
3388 case R_PPC_PLT16_LO:
3389 case R_PPC_PLT16_HI:
3390 case R_PPC_PLT16_HA:
3391#ifdef DEBUG
3392 fprintf (stderr, "Reloc requires a PLT entry\n");
3393#endif
3394 /* This symbol requires a procedure linkage table entry. We
3395 actually build the entry in finish_dynamic_symbol,
3396 because this might be a case of linking PIC code without
3397 linking in any dynamic objects, in which case we don't
3398 need to generate a procedure linkage table after all. */
3399
3400 if (h == NULL)
3401 {
3402 /* It does not make sense to have a procedure linkage
3403 table entry for a local symbol. */
3404 bfd_set_error (bfd_error_bad_value);
3405 return FALSE;
3406 }
3407
3408 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3409 h->plt.refcount++;
3410 break;
3411
3412 /* The following relocations don't need to propagate the
3413 relocation if linking a shared object since they are
3414 section relative. */
3415 case R_PPC_SECTOFF:
3416 case R_PPC_SECTOFF_LO:
3417 case R_PPC_SECTOFF_HI:
3418 case R_PPC_SECTOFF_HA:
3419 case R_PPC_DTPREL16:
3420 case R_PPC_DTPREL16_LO:
3421 case R_PPC_DTPREL16_HI:
3422 case R_PPC_DTPREL16_HA:
3423 case R_PPC_TOC16:
3424 break;
3425
3426 /* This are just markers. */
3427 case R_PPC_TLS:
3428 case R_PPC_EMB_MRKREF:
3429 case R_PPC_NONE:
3430 case R_PPC_max:
3431 break;
3432
3433 /* These should only appear in dynamic objects. */
3434 case R_PPC_COPY:
3435 case R_PPC_GLOB_DAT:
3436 case R_PPC_JMP_SLOT:
3437 case R_PPC_RELATIVE:
3438 break;
3439
3440 /* These aren't handled yet. We'll report an error later. */
3441 case R_PPC_ADDR30:
3442 case R_PPC_EMB_RELSEC16:
3443 case R_PPC_EMB_RELST_LO:
3444 case R_PPC_EMB_RELST_HI:
3445 case R_PPC_EMB_RELST_HA:
3446 case R_PPC_EMB_BIT_FLD:
3447 break;
3448
3449 /* This refers only to functions defined in the shared library. */
3450 case R_PPC_LOCAL24PC:
3451 break;
3452
3453 /* This relocation describes the C++ object vtable hierarchy.
3454 Reconstruct it for later use during GC. */
3455 case R_PPC_GNU_VTINHERIT:
3456 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3457 return FALSE;
3458 break;
3459
3460 /* This relocation describes which C++ vtable entries are actually
3461 used. Record for later use during GC. */
3462 case R_PPC_GNU_VTENTRY:
3463 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3464 return FALSE;
3465 break;
3466
3467 /* We shouldn't really be seeing these. */
3468 case R_PPC_TPREL32:
3469 if (info->shared)
3470 info->flags |= DF_STATIC_TLS;
3471 goto dodyn;
3472
3473 /* Nor these. */
3474 case R_PPC_DTPMOD32:
3475 case R_PPC_DTPREL32:
3476 goto dodyn;
3477
3478 case R_PPC_TPREL16:
3479 case R_PPC_TPREL16_LO:
3480 case R_PPC_TPREL16_HI:
3481 case R_PPC_TPREL16_HA:
3482 if (info->shared)
3483 info->flags |= DF_STATIC_TLS;
3484 goto dodyn;
3485
3486 /* When creating a shared object, we must copy these
3487 relocs into the output file. We create a reloc
3488 section in dynobj and make room for the reloc. */
3489 case R_PPC_REL24:
3490 case R_PPC_REL14:
3491 case R_PPC_REL14_BRTAKEN:
3492 case R_PPC_REL14_BRNTAKEN:
3493 case R_PPC_REL32:
3494 if (h == NULL
3495 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3496 break;
3497 /* fall through */
3498
3499 case R_PPC_ADDR32:
3500 case R_PPC_ADDR24:
3501 case R_PPC_ADDR16:
3502 case R_PPC_ADDR16_LO:
3503 case R_PPC_ADDR16_HI:
3504 case R_PPC_ADDR16_HA:
3505 case R_PPC_ADDR14:
3506 case R_PPC_ADDR14_BRTAKEN:
3507 case R_PPC_ADDR14_BRNTAKEN:
3508 case R_PPC_UADDR32:
3509 case R_PPC_UADDR16:
3510 if (h != NULL && !info->shared)
3511 {
3512 /* We may need a plt entry if the symbol turns out to be
3513 a function defined in a dynamic object. */
3514 h->plt.refcount++;
3515
3516 /* We may need a copy reloc too. */
3517 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3518 }
3519
3520 dodyn:
3521 /* If we are creating a shared library, and this is a reloc
3522 against a global symbol, or a non PC relative reloc
3523 against a local symbol, then we need to copy the reloc
3524 into the shared library. However, if we are linking with
3525 -Bsymbolic, we do not need to copy a reloc against a
3526 global symbol which is defined in an object we are
3527 including in the link (i.e., DEF_REGULAR is set). At
3528 this point we have not seen all the input files, so it is
3529 possible that DEF_REGULAR is not set now but will be set
3530 later (it is never cleared). In case of a weak definition,
3531 DEF_REGULAR may be cleared later by a strong definition in
3532 a shared library. We account for that possibility below by
3533 storing information in the dyn_relocs field of the hash
3534 table entry. A similar situation occurs when creating
3535 shared libraries and symbol visibility changes render the
3536 symbol local.
3537
3538 If on the other hand, we are creating an executable, we
3539 may need to keep relocations for symbols satisfied by a
3540 dynamic library if we manage to avoid copy relocs for the
3541 symbol. */
3542 if ((info->shared
3543 && (MUST_BE_DYN_RELOC (r_type)
3544 || (h != NULL
3545 && (! info->symbolic
3546 || h->root.type == bfd_link_hash_defweak
3547 || (h->elf_link_hash_flags
3548 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3549 || (ELIMINATE_COPY_RELOCS
3550 && !info->shared
3551 && (sec->flags & SEC_ALLOC) != 0
3552 && h != NULL
3553 && (h->root.type == bfd_link_hash_defweak
3554 || (h->elf_link_hash_flags
3555 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3556 {
3557 struct ppc_elf_dyn_relocs *p;
3558 struct ppc_elf_dyn_relocs **head;
3559
3560#ifdef DEBUG
3561 fprintf (stderr, "ppc_elf_check_relocs need to create relocation for %s\n",
3562 (h && h->root.root.string
3563 ? h->root.root.string : "<unknown>"));
3564#endif
3565 if (sreloc == NULL)
3566 {
3567 const char *name;
3568
3569 name = (bfd_elf_string_from_elf_section
3570 (abfd,
3571 elf_elfheader (abfd)->e_shstrndx,
3572 elf_section_data (sec)->rel_hdr.sh_name));
3573 if (name == NULL)
3574 return FALSE;
3575
3576 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3577 && strcmp (bfd_get_section_name (abfd, sec),
3578 name + 5) == 0);
3579
3580 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3581 if (sreloc == NULL)
3582 {
3583 flagword flags;
3584
3585 sreloc = bfd_make_section (htab->elf.dynobj, name);
3586 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3587 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3588 if ((sec->flags & SEC_ALLOC) != 0)
3589 flags |= SEC_ALLOC | SEC_LOAD;
3590 if (sreloc == NULL
3591 || ! bfd_set_section_flags (htab->elf.dynobj,
3592 sreloc, flags)
3593 || ! bfd_set_section_alignment (htab->elf.dynobj,
3594 sreloc, 2))
3595 return FALSE;
3596 }
3597 elf_section_data (sec)->sreloc = sreloc;
3598 }
3599
3600 /* If this is a global symbol, we count the number of
3601 relocations we need for this symbol. */
3602 if (h != NULL)
3603 {
3604 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3605 }
3606 else
3607 {
3608 /* Track dynamic relocs needed for local syms too.
3609 We really need local syms available to do this
3610 easily. Oh well. */
3611
3612 asection *s;
3613 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3614 sec, r_symndx);
3615 if (s == NULL)
3616 return FALSE;
3617
3618 head = ((struct ppc_elf_dyn_relocs **)
3619 &elf_section_data (s)->local_dynrel);
3620 }
3621
3622 p = *head;
3623 if (p == NULL || p->sec != sec)
3624 {
3625 p = ((struct ppc_elf_dyn_relocs *)
3626 bfd_alloc (htab->elf.dynobj, sizeof *p));
3627 if (p == NULL)
3628 return FALSE;
3629 p->next = *head;
3630 *head = p;
3631 p->sec = sec;
3632 p->count = 0;
3633 p->pc_count = 0;
3634 }
3635
3636 p->count += 1;
3637 if (!MUST_BE_DYN_RELOC (r_type))
3638 p->pc_count += 1;
3639 }
3640
3641 break;
3642 }
3643 }
3644
3645 return TRUE;
3646}
3647
3648/* Return the section that should be marked against GC for a given
3649 relocation. */
3650
3651static asection *
3652ppc_elf_gc_mark_hook (sec, info, rel, h, sym)
3653 asection *sec;
3654 struct bfd_link_info *info ATTRIBUTE_UNUSED;
3655 Elf_Internal_Rela *rel;
3656 struct elf_link_hash_entry *h;
3657 Elf_Internal_Sym *sym;
3658{
3659 if (h != NULL)
3660 {
3661 switch (ELF32_R_TYPE (rel->r_info))
3662 {
3663 case R_PPC_GNU_VTINHERIT:
3664 case R_PPC_GNU_VTENTRY:
3665 break;
3666
3667 default:
3668 switch (h->root.type)
3669 {
3670 case bfd_link_hash_defined:
3671 case bfd_link_hash_defweak:
3672 return h->root.u.def.section;
3673
3674 case bfd_link_hash_common:
3675 return h->root.u.c.p->section;
3676
3677 default:
3678 break;
3679 }
3680 }
3681 }
3682 else
3683 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3684
3685 return NULL;
3686}
3687
3688/* Update the got, plt and dynamic reloc reference counts for the
3689 section being removed. */
3690
3691static bfd_boolean
3692ppc_elf_gc_sweep_hook (abfd, info, sec, relocs)
3693 bfd *abfd;
3694 struct bfd_link_info *info;
3695 asection *sec;
3696 const Elf_Internal_Rela *relocs;
3697{
3698 struct ppc_elf_link_hash_table *htab;
3699 Elf_Internal_Shdr *symtab_hdr;
3700 struct elf_link_hash_entry **sym_hashes;
3701 bfd_signed_vma *local_got_refcounts;
3702 const Elf_Internal_Rela *rel, *relend;
3703
3704 elf_section_data (sec)->local_dynrel = NULL;
3705
3706 htab = ppc_elf_hash_table (info);
3707 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3708 sym_hashes = elf_sym_hashes (abfd);
3709 local_got_refcounts = elf_local_got_refcounts (abfd);
3710
3711 relend = relocs + sec->reloc_count;
3712 for (rel = relocs; rel < relend; rel++)
3713 {
3714 unsigned long r_symndx;
3715 enum elf_ppc_reloc_type r_type;
3716 struct elf_link_hash_entry *h = NULL;
3717
3718 r_symndx = ELF32_R_SYM (rel->r_info);
3719 if (r_symndx >= symtab_hdr->sh_info)
3720 {
3721 struct ppc_elf_dyn_relocs **pp, *p;
3722 struct ppc_elf_link_hash_entry *eh;
3723
3724 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3725 eh = (struct ppc_elf_link_hash_entry *) h;
3726
3727 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3728 if (p->sec == sec)
3729 {
3730 /* Everything must go for SEC. */
3731 *pp = p->next;
3732 break;
3733 }
3734 }
3735
3736 r_type = (enum elf_ppc_reloc_type) ELF32_R_TYPE (rel->r_info);
3737 switch (r_type)
3738 {
3739 case R_PPC_GOT_TLSLD16:
3740 case R_PPC_GOT_TLSLD16_LO:
3741 case R_PPC_GOT_TLSLD16_HI:
3742 case R_PPC_GOT_TLSLD16_HA:
3743 htab->tlsld_got.refcount -= 1;
3744 /* Fall thru */
3745
3746 case R_PPC_GOT_TLSGD16:
3747 case R_PPC_GOT_TLSGD16_LO:
3748 case R_PPC_GOT_TLSGD16_HI:
3749 case R_PPC_GOT_TLSGD16_HA:
3750 case R_PPC_GOT_TPREL16:
3751 case R_PPC_GOT_TPREL16_LO:
3752 case R_PPC_GOT_TPREL16_HI:
3753 case R_PPC_GOT_TPREL16_HA:
3754 case R_PPC_GOT_DTPREL16:
3755 case R_PPC_GOT_DTPREL16_LO:
3756 case R_PPC_GOT_DTPREL16_HI:
3757 case R_PPC_GOT_DTPREL16_HA:
3758 case R_PPC_GOT16:
3759 case R_PPC_GOT16_LO:
3760 case R_PPC_GOT16_HI:
3761 case R_PPC_GOT16_HA:
3762 if (h != NULL)
3763 {
3764 if (h->got.refcount > 0)
3765 h->got.refcount--;
3766 }
3767 else if (local_got_refcounts != NULL)
3768 {
3769 if (local_got_refcounts[r_symndx] > 0)
3770 local_got_refcounts[r_symndx]--;
3771 }
3772 break;
3773
3774 case R_PPC_REL24:
3775 case R_PPC_REL14:
3776 case R_PPC_REL14_BRTAKEN:
3777 case R_PPC_REL14_BRNTAKEN:
3778 case R_PPC_REL32:
3779 if (h == NULL
3780 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3781 break;
3782 /* Fall thru */
3783
3784 case R_PPC_ADDR32:
3785 case R_PPC_ADDR24:
3786 case R_PPC_ADDR16:
3787 case R_PPC_ADDR16_LO:
3788 case R_PPC_ADDR16_HI:
3789 case R_PPC_ADDR16_HA:
3790 case R_PPC_ADDR14:
3791 case R_PPC_ADDR14_BRTAKEN:
3792 case R_PPC_ADDR14_BRNTAKEN:
3793 case R_PPC_UADDR32:
3794 case R_PPC_UADDR16:
3795 case R_PPC_PLT32:
3796 case R_PPC_PLTREL24:
3797 case R_PPC_PLT16_LO:
3798 case R_PPC_PLT16_HI:
3799 case R_PPC_PLT16_HA:
3800 if (h != NULL)
3801 {
3802 if (h->plt.refcount > 0)
3803 h->plt.refcount--;
3804 }
3805 break;
3806
3807 default:
3808 break;
3809 }
3810 }
3811 return TRUE;
3812}
3813
3814/* Set htab->tls_sec and htab->tls_get_addr. */
3815
3816bfd_boolean
3817ppc_elf_tls_setup (obfd, info)
3818 bfd *obfd;
3819 struct bfd_link_info *info;
3820{
3821 asection *tls;
3822 struct ppc_elf_link_hash_table *htab;
3823
3824 htab = ppc_elf_hash_table (info);
3825 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3826 FALSE, FALSE, TRUE);
3827
3828 for (tls = obfd->sections; tls != NULL; tls = tls->next)
3829 if ((tls->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
3830 == (SEC_THREAD_LOCAL | SEC_LOAD))
3831 break;
3832 htab->tls_sec = tls;
3833
3834 return tls != NULL;
3835}
3836
3837/* Run through all the TLS relocs looking for optimization
3838 opportunities. */
3839
3840bfd_boolean
3841ppc_elf_tls_optimize (obfd, info)
3842 bfd *obfd ATTRIBUTE_UNUSED;
3843 struct bfd_link_info *info;
3844{
3845 bfd *ibfd;
3846 asection *sec;
3847 struct ppc_elf_link_hash_table *htab;
3848
3849 if (info->relocateable || info->shared)
3850 return TRUE;
3851
3852 htab = ppc_elf_hash_table (info);
3853 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3854 {
3855 Elf_Internal_Sym *locsyms = NULL;
3856 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3857
3858 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3859 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3860 {
3861 Elf_Internal_Rela *relstart, *rel, *relend;
3862 int expecting_tls_get_addr;
3863
3864 /* Read the relocations. */
3865 relstart = _bfd_elf32_link_read_relocs (ibfd, sec, (PTR) NULL,
3866 (Elf_Internal_Rela *) NULL,
3867 info->keep_memory);
3868 if (relstart == NULL)
3869 return FALSE;
3870
3871 expecting_tls_get_addr = 0;
3872 relend = relstart + sec->reloc_count;
3873 for (rel = relstart; rel < relend; rel++)
3874 {
3875 enum elf_ppc_reloc_type r_type;
3876 unsigned long r_symndx;
3877 struct elf_link_hash_entry *h = NULL;
3878 char *tls_mask;
3879 char tls_set, tls_clear;
3880 bfd_boolean is_local;
3881
3882 r_symndx = ELF32_R_SYM (rel->r_info);
3883 if (r_symndx >= symtab_hdr->sh_info)
3884 {
3885 struct elf_link_hash_entry **sym_hashes;
3886
3887 sym_hashes = elf_sym_hashes (ibfd);
3888 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3889 while (h->root.type == bfd_link_hash_indirect
3890 || h->root.type == bfd_link_hash_warning)
3891 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3892 }
3893
3894 is_local = FALSE;
3895 if (h == NULL
3896 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
3897 is_local = TRUE;
3898
3899 r_type = (enum elf_ppc_reloc_type) ELF32_R_TYPE (rel->r_info);
3900 switch (r_type)
3901 {
3902 case R_PPC_GOT_TLSLD16:
3903 case R_PPC_GOT_TLSLD16_LO:
3904 case R_PPC_GOT_TLSLD16_HI:
3905 case R_PPC_GOT_TLSLD16_HA:
3906 /* These relocs should never be against a symbol
3907 defined in a shared lib. Leave them alone if
3908 that turns out to be the case. */
3909 expecting_tls_get_addr = 0;
3910 htab->tlsld_got.refcount -= 1;
3911 if (!is_local)
3912 continue;
3913
3914 /* LD -> LE */
3915 tls_set = 0;
3916 tls_clear = TLS_LD;
3917 expecting_tls_get_addr = 1;
3918 break;
3919
3920 case R_PPC_GOT_TLSGD16:
3921 case R_PPC_GOT_TLSGD16_LO:
3922 case R_PPC_GOT_TLSGD16_HI:
3923 case R_PPC_GOT_TLSGD16_HA:
3924 if (is_local)
3925 /* GD -> LE */
3926 tls_set = 0;
3927 else
3928 /* GD -> IE */
3929 tls_set = TLS_TLS | TLS_TPRELGD;
3930 tls_clear = TLS_GD;
3931 expecting_tls_get_addr = 1;
3932 break;
3933
3934 case R_PPC_GOT_TPREL16:
3935 case R_PPC_GOT_TPREL16_LO:
3936 case R_PPC_GOT_TPREL16_HI:
3937 case R_PPC_GOT_TPREL16_HA:
3938 expecting_tls_get_addr = 0;
3939 if (is_local)
3940 {
3941 /* IE -> LE */
3942 tls_set = 0;
3943 tls_clear = TLS_TPREL;
3944 break;
3945 }
3946 else
3947 continue;
3948
3949 case R_PPC_REL14:
3950 case R_PPC_REL14_BRTAKEN:
3951 case R_PPC_REL14_BRNTAKEN:
3952 case R_PPC_REL24:
3953 if (expecting_tls_get_addr
3954 && h != NULL
3955 && h == htab->tls_get_addr)
3956 {
3957 if (h->plt.refcount > 0)
3958 h->plt.refcount -= 1;
3959 }
3960 expecting_tls_get_addr = 0;
3961 continue;
3962
3963 default:
3964 expecting_tls_get_addr = 0;
3965 continue;
3966 }
3967
3968 if (h != NULL)
3969 {
3970 if (tls_set == 0)
3971 {
3972 /* We managed to get rid of a got entry. */
3973 if (h->got.refcount > 0)
3974 h->got.refcount -= 1;
3975 }
3976 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3977 }
3978 else
3979 {
3980 Elf_Internal_Sym *sym;
3981 bfd_signed_vma *lgot_refs;
3982 char *lgot_masks;
3983
3984 if (locsyms == NULL)
3985 {
3986 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3987 if (locsyms == NULL)
3988 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3989 symtab_hdr->sh_info,
3990 0, NULL, NULL, NULL);
3991 if (locsyms == NULL)
3992 {
3993 if (elf_section_data (sec)->relocs != relstart)
3994 free (relstart);
3995 return FALSE;
3996 }
3997 }
3998 sym = locsyms + r_symndx;
3999 lgot_refs = elf_local_got_refcounts (ibfd);
4000 if (lgot_refs == NULL)
4001 abort ();
4002 if (tls_set == 0)
4003 {
4004 /* We managed to get rid of a got entry. */
4005 if (lgot_refs[r_symndx] > 0)
4006 lgot_refs[r_symndx] -= 1;
4007 }
4008 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4009 tls_mask = &lgot_masks[r_symndx];
4010 }
4011
4012 *tls_mask |= tls_set;
4013 *tls_mask &= ~tls_clear;
4014 }
4015
4016 if (elf_section_data (sec)->relocs != relstart)
4017 free (relstart);
4018 }
4019
4020 if (locsyms != NULL
4021 && (symtab_hdr->contents != (unsigned char *) locsyms))
4022 {
4023 if (!info->keep_memory)
4024 free (locsyms);
4025 else
4026 symtab_hdr->contents = (unsigned char *) locsyms;
4027 }
4028 }
4029 return TRUE;
4030}
4031
4032
4033/* Hook called by the linker routine which adds symbols from an object
4034 file. We use it to put .comm items in .sbss, and not .bss. */
4035
4036static bfd_boolean
4037ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
4038 bfd *abfd;
4039 struct bfd_link_info *info;
4040 const Elf_Internal_Sym *sym;
4041 const char **namep ATTRIBUTE_UNUSED;
4042 flagword *flagsp ATTRIBUTE_UNUSED;
4043 asection **secp;
4044 bfd_vma *valp;
4045{
4046 if (sym->st_shndx == SHN_COMMON
4047 && !info->relocateable
4048 && sym->st_size <= elf_gp_size (abfd)
4049 && info->hash->creator->flavour == bfd_target_elf_flavour)
4050 {
4051 /* Common symbols less than or equal to -G nn bytes are automatically
4052 put into .sdata. */
4053 elf_linker_section_t *sdata
4054 = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA);
4055
4056 if (!sdata->bss_section)
4057 {
4058 bfd_size_type amt;
4059
4060 /* We don't go through bfd_make_section, because we don't
4061 want to attach this common section to DYNOBJ. The linker
4062 will move the symbols to the appropriate output section
4063 when it defines common symbols. */
4064 amt = sizeof (asection);
4065 sdata->bss_section = (asection *) bfd_zalloc (abfd, amt);
4066 if (sdata->bss_section == NULL)
4067 return FALSE;
4068 sdata->bss_section->name = sdata->bss_name;
4069 sdata->bss_section->flags = SEC_IS_COMMON;
4070 sdata->bss_section->output_section = sdata->bss_section;
4071 amt = sizeof (asymbol);
4072 sdata->bss_section->symbol = (asymbol *) bfd_zalloc (abfd, amt);
4073 amt = sizeof (asymbol *);
4074 sdata->bss_section->symbol_ptr_ptr =
4075 (asymbol **) bfd_zalloc (abfd, amt);
4076 if (sdata->bss_section->symbol == NULL
4077 || sdata->bss_section->symbol_ptr_ptr == NULL)
4078 return FALSE;
4079 sdata->bss_section->symbol->name = sdata->bss_name;
4080 sdata->bss_section->symbol->flags = BSF_SECTION_SYM;
4081 sdata->bss_section->symbol->section = sdata->bss_section;
4082 *sdata->bss_section->symbol_ptr_ptr = sdata->bss_section->symbol;
4083 }
4084
4085 *secp = sdata->bss_section;
4086 *valp = sym->st_size;
4087 }
4088
4089 return TRUE;
4090}
4091
4092
4093/* Finish up dynamic symbol handling. We set the contents of various
4094 dynamic sections here. */
4095
4096static bfd_boolean
4097ppc_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
4098 bfd *output_bfd;
4099 struct bfd_link_info *info;
4100 struct elf_link_hash_entry *h;
4101 Elf_Internal_Sym *sym;
4102{
4103 struct ppc_elf_link_hash_table *htab;
4104
4105#ifdef DEBUG
4106 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
4107 h->root.root.string);
4108#endif
4109
4110 htab = ppc_elf_hash_table (info);
4111 BFD_ASSERT (htab->elf.dynobj != NULL);
4112
4113 if (h->plt.offset != (bfd_vma) -1)
4114 {
4115 Elf_Internal_Rela rela;
4116 bfd_byte *loc;
4117 bfd_vma reloc_index;
4118
4119#ifdef DEBUG
4120 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
4121#endif
4122
4123 /* This symbol has an entry in the procedure linkage table. Set
4124 it up. */
4125
4126 BFD_ASSERT (h->dynindx != -1);
4127 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
4128
4129 /* We don't need to fill in the .plt. The ppc dynamic linker
4130 will fill it in. */
4131
4132 /* Fill in the entry in the .rela.plt section. */
4133 rela.r_offset = (htab->plt->output_section->vma
4134 + htab->plt->output_offset
4135 + h->plt.offset);
4136 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
4137 rela.r_addend = 0;
4138
4139 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
4140 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
4141 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
4142 loc = (htab->relplt->contents
4143 + reloc_index * sizeof (Elf32_External_Rela));
4144 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4145
4146 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4147 {
4148 /* Mark the symbol as undefined, rather than as defined in
4149 the .plt section. Leave the value alone. */
4150 sym->st_shndx = SHN_UNDEF;
4151 /* If the symbol is weak, we do need to clear the value.
4152 Otherwise, the PLT entry would provide a definition for
4153 the symbol even if the symbol wasn't defined anywhere,
4154 and so the symbol would never be NULL. */
4155 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
4156 == 0)
4157 sym->st_value = 0;
4158 }
4159 }
4160
4161 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4162 {
4163 asection *s;
4164 Elf_Internal_Rela rela;
4165 bfd_byte *loc;
4166
4167 /* This symbols needs a copy reloc. Set it up. */
4168
4169#ifdef DEBUG
4170 fprintf (stderr, ", copy");
4171#endif
4172
4173 BFD_ASSERT (h->dynindx != -1);
4174
4175 if (h->size <= elf_gp_size (htab->elf.dynobj))
4176 s = htab->relsbss;
4177 else
4178 s = htab->relbss;
4179 BFD_ASSERT (s != NULL);
4180
4181 rela.r_offset = (h->root.u.def.value
4182 + h->root.u.def.section->output_section->vma
4183 + h->root.u.def.section->output_offset);
4184 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
4185 rela.r_addend = 0;
4186 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4187 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4188 }
4189
4190#ifdef DEBUG
4191 fprintf (stderr, "\n");
4192#endif
4193
4194 /* Mark some specially defined symbols as absolute. */
4195 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4196 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
4197 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
4198 sym->st_shndx = SHN_ABS;
4199
4200 return TRUE;
4201}
4202
4203
4204/* Finish up the dynamic sections. */
4205
4206static bfd_boolean
4207ppc_elf_finish_dynamic_sections (output_bfd, info)
4208 bfd *output_bfd;
4209 struct bfd_link_info *info;
4210{
4211 asection *sdyn;
4212 struct ppc_elf_link_hash_table *htab;
4213
4214#ifdef DEBUG
4215 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
4216#endif
4217
4218 htab = ppc_elf_hash_table (info);
4219 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
4220
4221 if (htab->elf.dynamic_sections_created)
4222 {
4223 Elf32_External_Dyn *dyncon, *dynconend;
4224
4225 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
4226
4227 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4228 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4229 for (; dyncon < dynconend; dyncon++)
4230 {
4231 Elf_Internal_Dyn dyn;
4232 asection *s;
4233
4234 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
4235
4236 switch (dyn.d_tag)
4237 {
4238 case DT_PLTGOT:
4239 s = htab->plt;
4240 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4241 break;
4242
4243 case DT_PLTRELSZ:
4244 dyn.d_un.d_val = htab->relplt->_raw_size;
4245 break;
4246
4247 case DT_JMPREL:
4248 s = htab->relplt;
4249 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4250 break;
4251
4252 default:
4253 continue;
4254 }
4255
4256 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4257 }
4258 }
4259
4260 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
4261 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
4262 if (htab->got)
4263 {
4264 unsigned char *contents = htab->got->contents;
4265 bfd_put_32 (output_bfd, (bfd_vma) 0x4e800021 /* blrl */, contents);
4266
4267 if (sdyn == NULL)
4268 bfd_put_32 (output_bfd, (bfd_vma) 0, contents + 4);
4269 else
4270 bfd_put_32 (output_bfd,
4271 sdyn->output_section->vma + sdyn->output_offset,
4272 contents + 4);
4273
4274 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
4275 }
4276
4277 return TRUE;
4278}
4279
4280
4281/* The RELOCATE_SECTION function is called by the ELF backend linker
4282 to handle the relocations for a section.
4283
4284 The relocs are always passed as Rela structures; if the section
4285 actually uses Rel structures, the r_addend field will always be
4286 zero.
4287
4288 This function is responsible for adjust the section contents as
4289 necessary, and (if using Rela relocs and generating a
4290 relocateable output file) adjusting the reloc addend as
4291 necessary.
4292
4293 This function does not have to worry about setting the reloc
4294 address or the reloc symbol index.
4295
4296 LOCAL_SYMS is a pointer to the swapped in local symbols.
4297
4298 LOCAL_SECTIONS is an array giving the section in the input file
4299 corresponding to the st_shndx field of each local symbol.
4300
4301 The global hash table entry for the global symbols can be found
4302 via elf_sym_hashes (input_bfd).
4303
4304 When generating relocateable output, this function must handle
4305 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
4306 going to be the section symbol corresponding to the output
4307 section, which means that the addend must be adjusted
4308 accordingly. */
4309
4310static bfd_boolean
4311ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section,
4312 contents, relocs, local_syms, local_sections)
4313 bfd *output_bfd;
4314 struct bfd_link_info *info;
4315 bfd *input_bfd;
4316 asection *input_section;
4317 bfd_byte *contents;
4318 Elf_Internal_Rela *relocs;
4319 Elf_Internal_Sym *local_syms;
4320 asection **local_sections;
4321{
4322 Elf_Internal_Shdr *symtab_hdr;
4323 struct elf_link_hash_entry **sym_hashes;
4324 struct ppc_elf_link_hash_table *htab;
4325 Elf_Internal_Rela *rel;
4326 Elf_Internal_Rela *relend;
4327 Elf_Internal_Rela outrel;
4328 bfd_byte *loc;
4329 asection *sreloc = NULL;
4330 bfd_vma *local_got_offsets;
4331 bfd_boolean ret = TRUE;
4332
4333#ifdef DEBUG
4334 fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n",
4335 bfd_archive_filename (input_bfd),
4336 bfd_section_name(input_bfd, input_section),
4337 (long) input_section->reloc_count,
4338 (info->relocateable) ? " (relocatable)" : "");
4339#endif
4340
4341 if (info->relocateable)
4342 return TRUE;
4343
4344 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4345 /* Initialize howto table if needed. */
4346 ppc_elf_howto_init ();
4347
4348 htab = ppc_elf_hash_table (info);
4349 local_got_offsets = elf_local_got_offsets (input_bfd);
4350 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4351 sym_hashes = elf_sym_hashes (input_bfd);
4352 rel = relocs;
4353 relend = relocs + input_section->reloc_count;
4354 for (; rel < relend; rel++)
4355 {
4356 enum elf_ppc_reloc_type r_type;
4357 bfd_vma addend;
4358 bfd_reloc_status_type r;
4359 Elf_Internal_Sym *sym;
4360 asection *sec;
4361 struct elf_link_hash_entry *h;
4362 const char *sym_name;
4363 reloc_howto_type *howto;
4364 unsigned long r_symndx;
4365 bfd_vma relocation;
4366 bfd_vma branch_bit, insn, from;
4367 bfd_boolean unresolved_reloc;
4368 bfd_boolean warned;
4369 unsigned int tls_type, tls_mask, tls_gd;
4370
4371 r_type = (enum elf_ppc_reloc_type)ELF32_R_TYPE (rel->r_info);
4372 sym = (Elf_Internal_Sym *) 0;
4373 sec = (asection *) 0;
4374 h = (struct elf_link_hash_entry *) 0;
4375 unresolved_reloc = FALSE;
4376 warned = FALSE;
4377 r_symndx = ELF32_R_SYM (rel->r_info);
4378 if (r_symndx < symtab_hdr->sh_info)
4379 {
4380 sym = local_syms + r_symndx;
4381 sec = local_sections[r_symndx];
4382 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
4383
4384 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
4385 }
4386 else
4387 {
4388 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4389 while (h->root.type == bfd_link_hash_indirect
4390 || h->root.type == bfd_link_hash_warning)
4391 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4392 sym_name = h->root.root.string;
4393
4394 relocation = 0;
4395 if (h->root.type == bfd_link_hash_defined
4396 || h->root.type == bfd_link_hash_defweak)
4397 {
4398 sec = h->root.u.def.section;
4399 /* Set a flag that will be cleared later if we find a
4400 relocation value for this symbol. output_section
4401 is typically NULL for symbols satisfied by a shared
4402 library. */
4403 if (sec->output_section == NULL)
4404 unresolved_reloc = TRUE;
4405 else
4406 relocation = (h->root.u.def.value
4407 + sec->output_section->vma
4408 + sec->output_offset);
4409 }
4410 else if (h->root.type == bfd_link_hash_undefweak)
4411 ;
4412 else if (info->shared
4413 && !info->no_undefined
4414 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
4415 ;
4416 else
4417 {
4418 if (! ((*info->callbacks->undefined_symbol)
4419 (info, h->root.root.string, input_bfd, input_section,
4420 rel->r_offset, (!info->shared
4421 || info->no_undefined
4422 || ELF_ST_VISIBILITY (h->other)))))
4423 return FALSE;
4424 warned = TRUE;
4425 }
4426 }
4427
4428 /* TLS optimizations. Replace instruction sequences and relocs
4429 based on information we collected in tls_optimize. We edit
4430 RELOCS so that --emit-relocs will output something sensible
4431 for the final instruction stream. */
4432 tls_mask = 0;
4433 tls_gd = 0;
4434 if (IS_PPC_TLS_RELOC (r_type))
4435 {
4436 if (h != NULL)
4437 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
4438 else if (local_got_offsets != NULL)
4439 {
4440 char *lgot_masks;
4441 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
4442 tls_mask = lgot_masks[r_symndx];
4443 }
4444 }
4445
4446 /* Ensure reloc mapping code below stays sane. */
4447 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
4448 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
4449 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
4450 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
4451 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
4452 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
4453 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
4454 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
4455 abort ();
4456 switch (r_type)
4457 {
4458 default:
4459 break;
4460
4461 case R_PPC_GOT_TPREL16:
4462 case R_PPC_GOT_TPREL16_LO:
4463 if (tls_mask != 0
4464 && (tls_mask & TLS_TPREL) == 0)
4465 {
4466 bfd_vma insn;
4467 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
4468 insn &= 31 << 21;
4469 insn |= 0x3c020000; /* addis 0,2,0 */
4470 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
4471 r_type = R_PPC_TPREL16_HA;
4472 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4473 }
4474 break;
4475
4476 case R_PPC_TLS:
4477 if (tls_mask != 0
4478 && (tls_mask & TLS_TPREL) == 0)
4479 {
4480 bfd_vma insn, rtra;
4481 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4482 if ((insn & ((31 << 26) | (31 << 11)))
4483 == ((31 << 26) | (2 << 11)))
4484 rtra = insn & ((1 << 26) - (1 << 16));
4485 else if ((insn & ((31 << 26) | (31 << 16)))
4486 == ((31 << 26) | (2 << 16)))
4487 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
4488 else
4489 abort ();
4490 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
4491 /* add -> addi. */
4492 insn = 14 << 26;
4493 else if ((insn & (31 << 1)) == 23 << 1
4494 && ((insn & (31 << 6)) < 14 << 6
4495 || ((insn & (31 << 6)) >= 16 << 6
4496 && (insn & (31 << 6)) < 24 << 6)))
4497 /* load and store indexed -> dform. */
4498 insn = (32 | ((insn >> 6) & 31)) << 26;
4499 else if ((insn & (31 << 1)) == 21 << 1
4500 && (insn & (0x1a << 6)) == 0)
4501 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
4502 insn = (((58 | ((insn >> 6) & 4)) << 26)
4503 | ((insn >> 6) & 1));
4504 else if ((insn & (31 << 1)) == 21 << 1
4505 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
4506 /* lwax -> lwa. */
4507 insn = (58 << 26) | 2;
4508 else
4509 abort ();
4510 insn |= rtra;
4511 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4512 r_type = R_PPC_TPREL16_LO;
4513 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4514 /* Was PPC_TLS which sits on insn boundary, now
4515 PPC_TPREL16_LO which is at insn+2. */
4516 rel->r_offset += 2;
4517 }
4518 break;
4519
4520 case R_PPC_GOT_TLSGD16_HI:
4521 case R_PPC_GOT_TLSGD16_HA:
4522 tls_gd = TLS_TPRELGD;
4523 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4524 goto tls_gdld_hi;
4525 break;
4526
4527 case R_PPC_GOT_TLSLD16_HI:
4528 case R_PPC_GOT_TLSLD16_HA:
4529 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4530 {
4531 tls_gdld_hi:
4532 if ((tls_mask & tls_gd) != 0)
4533 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4534 + R_PPC_GOT_TPREL16);
4535 else
4536 {
4537 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
4538 rel->r_offset -= 2;
4539 r_type = R_PPC_NONE;
4540 }
4541 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4542 }
4543 break;
4544
4545 case R_PPC_GOT_TLSGD16:
4546 case R_PPC_GOT_TLSGD16_LO:
4547 tls_gd = TLS_TPRELGD;
4548 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4549 goto tls_get_addr_check;
4550 break;
4551
4552 case R_PPC_GOT_TLSLD16:
4553 case R_PPC_GOT_TLSLD16_LO:
4554 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4555 {
4556 tls_get_addr_check:
4557 if (rel + 1 < relend)
4558 {
4559 enum elf_ppc_reloc_type r_type2;
4560 unsigned long r_symndx2;
4561 struct elf_link_hash_entry *h2;
4562 bfd_vma insn1, insn2;
4563 bfd_vma offset;
4564
4565 /* The next instruction should be a call to
4566 __tls_get_addr. Peek at the reloc to be sure. */
4567 r_type2
4568 = (enum elf_ppc_reloc_type) ELF32_R_TYPE (rel[1].r_info);
4569 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4570 if (r_symndx2 < symtab_hdr->sh_info
4571 || (r_type2 != R_PPC_REL14
4572 && r_type2 != R_PPC_REL14_BRTAKEN
4573 && r_type2 != R_PPC_REL14_BRNTAKEN
4574 && r_type2 != R_PPC_REL24
4575 && r_type2 != R_PPC_PLTREL24))
4576 break;
4577
4578 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4579 while (h2->root.type == bfd_link_hash_indirect
4580 || h2->root.type == bfd_link_hash_warning)
4581 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
4582 if (h2 == NULL || h2 != htab->tls_get_addr)
4583 break;
4584
4585 /* OK, it checks out. Replace the call. */
4586 offset = rel[1].r_offset;
4587 insn1 = bfd_get_32 (output_bfd,
4588 contents + rel->r_offset - 2);
4589 if ((tls_mask & tls_gd) != 0)
4590 {
4591 /* IE */
4592 insn1 &= (1 << 26) - 1;
4593 insn1 |= 32 << 26; /* lwz */
4594 insn2 = 0x7c631214; /* add 3,3,2 */
4595 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
4596 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4597 + R_PPC_GOT_TPREL16);
4598 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4599 }
4600 else
4601 {
4602 /* LE */
4603 insn1 = 0x3c620000; /* addis 3,2,0 */
4604 insn2 = 0x38630000; /* addi 3,3,0 */
4605 if (tls_gd == 0)
4606 {
4607 /* Was an LD reloc. */
4608 r_symndx = 0;
4609 rel->r_addend = htab->tls_sec->vma + DTP_OFFSET;
4610 rel[1].r_addend = htab->tls_sec->vma + DTP_OFFSET;
4611 }
4612 r_type = R_PPC_TPREL16_HA;
4613 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4614 rel[1].r_info = ELF32_R_INFO (r_symndx,
4615 R_PPC_TPREL16_LO);
4616 rel[1].r_offset += 2;
4617 }
4618 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
4619 bfd_put_32 (output_bfd, insn2, contents + offset);
4620 if (tls_gd == 0)
4621 {
4622 /* We changed the symbol on an LD reloc. Start over
4623 in order to get h, sym, sec etc. right. */
4624 rel--;
4625 continue;
4626 }
4627 }
4628 }
4629 break;
4630 }
4631
4632 /* Handle other relocations that tweak non-addend part of insn. */
4633 branch_bit = 0;
4634 switch (r_type)
4635 {
4636 default:
4637 break;
4638
4639 /* Branch taken prediction relocations. */
4640 case R_PPC_ADDR14_BRTAKEN:
4641 case R_PPC_REL14_BRTAKEN:
4642 branch_bit = BRANCH_PREDICT_BIT;
4643 /* Fall thru */
4644
4645 /* Branch not taken predicition relocations. */
4646 case R_PPC_ADDR14_BRNTAKEN:
4647 case R_PPC_REL14_BRNTAKEN:
4648 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4649 insn &= ~BRANCH_PREDICT_BIT;
4650 insn |= branch_bit;
4651
4652 from = (rel->r_offset
4653 + input_section->output_offset
4654 + input_section->output_section->vma);
4655
4656 /* Invert 'y' bit if not the default. */
4657 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
4658 insn ^= BRANCH_PREDICT_BIT;
4659
4660 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4661 break;
4662 }
4663
4664 addend = rel->r_addend;
4665 tls_type = 0;
4666 howto = NULL;
4667 if ((unsigned) r_type < (unsigned) R_PPC_max)
4668 howto = ppc_elf_howto_table[(int) r_type];
4669 switch (r_type)
4670 {
4671 default:
4672 (*_bfd_error_handler)
4673 (_("%s: unknown relocation type %d for symbol %s"),
4674 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
4675
4676 bfd_set_error (bfd_error_bad_value);
4677 ret = FALSE;
4678 continue;
4679
4680 case R_PPC_NONE:
4681 case R_PPC_TLS:
4682 case R_PPC_EMB_MRKREF:
4683 case R_PPC_GNU_VTINHERIT:
4684 case R_PPC_GNU_VTENTRY:
4685 continue;
4686
4687 /* GOT16 relocations. Like an ADDR16 using the symbol's
4688 address in the GOT as relocation value instead of the
4689 symbol's value itself. Also, create a GOT entry for the
4690 symbol and put the symbol value there. */
4691 case R_PPC_GOT_TLSGD16:
4692 case R_PPC_GOT_TLSGD16_LO:
4693 case R_PPC_GOT_TLSGD16_HI:
4694 case R_PPC_GOT_TLSGD16_HA:
4695 tls_type = TLS_TLS | TLS_GD;
4696 goto dogot;
4697
4698 case R_PPC_GOT_TLSLD16:
4699 case R_PPC_GOT_TLSLD16_LO:
4700 case R_PPC_GOT_TLSLD16_HI:
4701 case R_PPC_GOT_TLSLD16_HA:
4702 tls_type = TLS_TLS | TLS_LD;
4703 goto dogot;
4704
4705 case R_PPC_GOT_TPREL16:
4706 case R_PPC_GOT_TPREL16_LO:
4707 case R_PPC_GOT_TPREL16_HI:
4708 case R_PPC_GOT_TPREL16_HA:
4709 tls_type = TLS_TLS | TLS_TPREL;
4710 goto dogot;
4711
4712 case R_PPC_GOT_DTPREL16:
4713 case R_PPC_GOT_DTPREL16_LO:
4714 case R_PPC_GOT_DTPREL16_HI:
4715 case R_PPC_GOT_DTPREL16_HA:
4716 tls_type = TLS_TLS | TLS_DTPREL;
4717 goto dogot;
4718
4719 case R_PPC_GOT16:
4720 case R_PPC_GOT16_LO:
4721 case R_PPC_GOT16_HI:
4722 case R_PPC_GOT16_HA:
4723 dogot:
4724 {
4725 /* Relocation is to the entry for this symbol in the global
4726 offset table. */
4727 bfd_vma off;
4728 bfd_vma *offp;
4729 unsigned long indx;
4730
4731 if (htab->got == NULL)
4732 abort ();
4733
4734 indx = 0;
4735 if (tls_type == (TLS_TLS | TLS_LD)
4736 && (h == NULL
4737 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
4738 offp = &htab->tlsld_got.offset;
4739 else if (h != NULL)
4740 {
4741 bfd_boolean dyn;
4742 dyn = htab->elf.dynamic_sections_created;
4743 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
4744 || (info->shared
4745 && SYMBOL_REFERENCES_LOCAL (info, h)))
4746 /* This is actually a static link, or it is a
4747 -Bsymbolic link and the symbol is defined
4748 locally, or the symbol was forced to be local
4749 because of a version file. */
4750 ;
4751 else
4752 {
4753 indx = h->dynindx;
4754 unresolved_reloc = FALSE;
4755 }
4756 offp = &h->got.offset;
4757 }
4758 else
4759 {
4760 if (local_got_offsets == NULL)
4761 abort ();
4762 offp = &local_got_offsets[r_symndx];
4763 }
4764
4765 /* The offset must always be a multiple of 4. We use the
4766 least significant bit to record whether we have already
4767 processed this entry. */
4768 off = *offp;
4769 if ((off & 1) != 0)
4770 off &= ~1;
4771 else
4772 {
4773 unsigned int tls_m = (tls_mask
4774 & (TLS_LD | TLS_GD | TLS_DTPREL
4775 | TLS_TPREL | TLS_TPRELGD));
4776
4777 if (offp == &htab->tlsld_got.offset)
4778 tls_m = TLS_LD;
4779 else if (h == NULL
4780 || !(h->elf_link_hash_flags
4781 & ELF_LINK_HASH_DEF_DYNAMIC))
4782 tls_m &= ~TLS_LD;
4783
4784 /* We might have multiple got entries for this sym.
4785 Initialize them all. */
4786 do
4787 {
4788 int tls_ty = 0;
4789
4790 if ((tls_m & TLS_LD) != 0)
4791 {
4792 tls_ty = TLS_TLS | TLS_LD;
4793 tls_m &= ~TLS_LD;
4794 }
4795 else if ((tls_m & TLS_GD) != 0)
4796 {
4797 tls_ty = TLS_TLS | TLS_GD;
4798 tls_m &= ~TLS_GD;
4799 }
4800 else if ((tls_m & TLS_DTPREL) != 0)
4801 {
4802 tls_ty = TLS_TLS | TLS_DTPREL;
4803 tls_m &= ~TLS_DTPREL;
4804 }
4805 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
4806 {
4807 tls_ty = TLS_TLS | TLS_TPREL;
4808 tls_m = 0;
4809 }
4810
4811 /* Generate relocs for the dynamic linker. */
4812 if (info->shared || indx != 0)
4813 {
4814 outrel.r_offset = (htab->got->output_section->vma
4815 + htab->got->output_offset
4816 + off);
4817 outrel.r_addend = 0;
4818 if (tls_ty & (TLS_LD | TLS_GD))
4819 {
4820 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
4821 if (tls_ty == (TLS_TLS | TLS_GD))
4822 {
4823 loc = htab->relgot->contents;
4824 loc += (htab->relgot->reloc_count++
4825 * sizeof (Elf32_External_Rela));
4826 bfd_elf32_swap_reloca_out (output_bfd,
4827 &outrel, loc);
4828 outrel.r_offset += 4;
4829 outrel.r_info
4830 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
4831 }
4832 }
4833 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
4834 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
4835 else if (tls_ty == (TLS_TLS | TLS_TPREL))
4836 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
4837 else if (indx == 0)
4838 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
4839 else
4840 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
4841 if (indx == 0)
4842 {
4843 outrel.r_addend += relocation;
4844 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
4845 outrel.r_addend -= htab->tls_sec->vma;
4846 }
4847 loc = htab->relgot->contents;
4848 loc += (htab->relgot->reloc_count++
4849 * sizeof (Elf32_External_Rela));
4850 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4851 }
4852
4853 /* Init the .got section contents if we're not
4854 emitting a reloc. */
4855 else
4856 {
4857 bfd_vma value = relocation;
4858
4859 if (tls_ty == (TLS_TLS | TLS_LD))
4860 value = 1;
4861 else if (tls_ty != 0)
4862 {
4863 value -= htab->tls_sec->vma + DTP_OFFSET;
4864 if (tls_ty == (TLS_TLS | TLS_TPREL))
4865 value += DTP_OFFSET - TP_OFFSET;
4866
4867 if (tls_ty == (TLS_TLS | TLS_GD))
4868 {
4869 bfd_put_32 (output_bfd, value,
4870 htab->got->contents + off + 4);
4871 value = 1;
4872 }
4873 }
4874 bfd_put_32 (output_bfd, value,
4875 htab->got->contents + off);
4876 }
4877
4878 off += 4;
4879 if (tls_ty & (TLS_LD | TLS_GD))
4880 off += 4;
4881 }
4882 while (tls_m != 0);
4883
4884 off = *offp;
4885 *offp = off | 1;
4886 }
4887
4888 if (off >= (bfd_vma) -2)
4889 abort ();
4890
4891 if ((tls_type & TLS_TLS) != 0)
4892 {
4893 if (tls_type != (TLS_TLS | TLS_LD))
4894 {
4895 if ((tls_mask & TLS_LD) != 0
4896 && !(h == NULL
4897 || !(h->elf_link_hash_flags
4898 & ELF_LINK_HASH_DEF_DYNAMIC)))
4899 off += 8;
4900 if (tls_type != (TLS_TLS | TLS_GD))
4901 {
4902 if ((tls_mask & TLS_GD) != 0)
4903 off += 8;
4904 if (tls_type != (TLS_TLS | TLS_DTPREL))
4905 {
4906 if ((tls_mask & TLS_DTPREL) != 0)
4907 off += 4;
4908 }
4909 }
4910 }
4911 }
4912
4913 relocation = htab->got->output_offset + off - 4;
4914
4915 /* Addends on got relocations don't make much sense.
4916 x+off@got is actually x@got+off, and since the got is
4917 generated by a hash table traversal, the value in the
4918 got at entry m+n bears little relation to the entry m. */
4919 if (addend != 0)
4920 (*_bfd_error_handler)
4921 (_("%s(%s+0x%lx): non-zero addend on %s reloc against `%s'"),
4922 bfd_archive_filename (input_bfd),
4923 bfd_get_section_name (input_bfd, input_section),
4924 (long) rel->r_offset,
4925 howto->name,
4926 sym_name);
4927 }
4928 break;
4929
4930 /* Relocations that need no special processing. */
4931 case R_PPC_LOCAL24PC:
4932 /* It makes no sense to point a local relocation
4933 at a symbol not in this object. */
4934 if (unresolved_reloc)
4935 {
4936 if (! (*info->callbacks->undefined_symbol) (info,
4937 h->root.root.string,
4938 input_bfd,
4939 input_section,
4940 rel->r_offset,
4941 TRUE))
4942 return FALSE;
4943 continue;
4944 }
4945 break;
4946
4947 case R_PPC_DTPREL16:
4948 case R_PPC_DTPREL16_LO:
4949 case R_PPC_DTPREL16_HI:
4950 case R_PPC_DTPREL16_HA:
4951 addend -= htab->tls_sec->vma + DTP_OFFSET;
4952 break;
4953
4954 /* Relocations that may need to be propagated if this is a shared
4955 object. */
4956 case R_PPC_TPREL16:
4957 case R_PPC_TPREL16_LO:
4958 case R_PPC_TPREL16_HI:
4959 case R_PPC_TPREL16_HA:
4960 addend -= htab->tls_sec->vma + TP_OFFSET;
4961 /* The TPREL16 relocs shouldn't really be used in shared
4962 libs as they will result in DT_TEXTREL being set, but
4963 support them anyway. */
4964 goto dodyn;
4965
4966 case R_PPC_TPREL32:
4967 addend -= htab->tls_sec->vma + TP_OFFSET;
4968 goto dodyn;
4969
4970 case R_PPC_DTPREL32:
4971 addend -= htab->tls_sec->vma + DTP_OFFSET;
4972 goto dodyn;
4973
4974 case R_PPC_DTPMOD32:
4975 relocation = 1;
4976 addend = 0;
4977 goto dodyn;
4978
4979 case R_PPC_REL24:
4980 case R_PPC_REL32:
4981 case R_PPC_REL14:
4982 case R_PPC_REL14_BRTAKEN:
4983 case R_PPC_REL14_BRNTAKEN:
4984 /* If these relocations are not to a named symbol, they can be
4985 handled right here, no need to bother the dynamic linker. */
4986 if (h == NULL
4987 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
4988 || SYMBOL_REFERENCES_LOCAL (info, h))
4989 break;
4990 /* fall through */
4991
4992 /* Relocations that always need to be propagated if this is a shared
4993 object. */
4994 case R_PPC_ADDR32:
4995 case R_PPC_ADDR24:
4996 case R_PPC_ADDR16:
4997 case R_PPC_ADDR16_LO:
4998 case R_PPC_ADDR16_HI:
4999 case R_PPC_ADDR16_HA:
5000 case R_PPC_ADDR14:
5001 case R_PPC_ADDR14_BRTAKEN:
5002 case R_PPC_ADDR14_BRNTAKEN:
5003 case R_PPC_UADDR32:
5004 case R_PPC_UADDR16:
5005 /* r_symndx will be zero only for relocs against symbols
5006 from removed linkonce sections, or sections discarded by
5007 a linker script. */
5008 dodyn:
5009 if (r_symndx == 0)
5010 break;
5011 /* Fall thru. */
5012
5013 if ((info->shared
5014 && (MUST_BE_DYN_RELOC (r_type)
5015 || (h != NULL
5016 && h->dynindx != -1
5017 && (!info->symbolic
5018 || (h->elf_link_hash_flags
5019 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
5020 || (ELIMINATE_COPY_RELOCS
5021 && !info->shared
5022 && (input_section->flags & SEC_ALLOC) != 0
5023 && h != NULL
5024 && h->dynindx != -1
5025 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5026 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5027 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
5028 {
5029 int skip;
5030
5031#ifdef DEBUG
5032 fprintf (stderr, "ppc_elf_relocate_section need to create relocation for %s\n",
5033 (h && h->root.root.string
5034 ? h->root.root.string : "<unknown>"));
5035#endif
5036
5037 /* When generating a shared object, these relocations
5038 are copied into the output file to be resolved at run
5039 time. */
5040 if (sreloc == NULL)
5041 {
5042 const char *name;
5043
5044 name = (bfd_elf_string_from_elf_section
5045 (input_bfd,
5046 elf_elfheader (input_bfd)->e_shstrndx,
5047 elf_section_data (input_section)->rel_hdr.sh_name));
5048 if (name == NULL)
5049 return FALSE;
5050
5051 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
5052 && strcmp (bfd_get_section_name (input_bfd,
5053 input_section),
5054 name + 5) == 0);
5055
5056 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
5057 BFD_ASSERT (sreloc != NULL);
5058 }
5059
5060 skip = 0;
5061
5062 outrel.r_offset =
5063 _bfd_elf_section_offset (output_bfd, info, input_section,
5064 rel->r_offset);
5065 if (outrel.r_offset == (bfd_vma) -1
5066 || outrel.r_offset == (bfd_vma) -2)
5067 skip = (int) outrel.r_offset;
5068 outrel.r_offset += (input_section->output_section->vma
5069 + input_section->output_offset);
5070
5071 if (skip)
5072 memset (&outrel, 0, sizeof outrel);
5073 else if (h != NULL
5074 && !SYMBOL_REFERENCES_LOCAL (info, h))
5075 {
5076 unresolved_reloc = FALSE;
5077 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5078 outrel.r_addend = rel->r_addend;
5079 }
5080 else
5081 {
5082 outrel.r_addend = relocation + rel->r_addend;
5083
5084 if (r_type == R_PPC_ADDR32)
5085 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
5086 else
5087 {
5088 long indx;
5089
5090 if (bfd_is_abs_section (sec))
5091 indx = 0;
5092 else if (sec == NULL || sec->owner == NULL)
5093 {
5094 bfd_set_error (bfd_error_bad_value);
5095 return FALSE;
5096 }
5097 else
5098 {
5099 asection *osec;
5100
5101 /* We are turning this relocation into one
5102 against a section symbol. It would be
5103 proper to subtract the symbol's value,
5104 osec->vma, from the emitted reloc addend,
5105 but ld.so expects buggy relocs. */
5106 osec = sec->output_section;
5107 indx = elf_section_data (osec)->dynindx;
5108 BFD_ASSERT (indx > 0);
5109#ifdef DEBUG
5110 if (indx <= 0)
5111 {
5112 printf ("indx=%d section=%s flags=%08x name=%s\n",
5113 indx, osec->name, osec->flags,
5114 h->root.root.string);
5115 }
5116#endif
5117 }
5118
5119 outrel.r_info = ELF32_R_INFO (indx, r_type);
5120 }
5121 }
5122
5123 loc = sreloc->contents;
5124 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5125 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5126
5127 if (skip == -1)
5128 continue;
5129
5130 /* This reloc will be computed at runtime. We clear the memory
5131 so that it contains predictable value. */
5132 if (! skip
5133 && ((input_section->flags & SEC_ALLOC) != 0
5134 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
5135 {
5136 relocation = howto->pc_relative ? outrel.r_offset : 0;
5137 addend = 0;
5138 break;
5139 }
5140 }
5141 break;
5142
5143 /* Indirect .sdata relocation. */
5144 case R_PPC_EMB_SDAI16:
5145 BFD_ASSERT (htab->sdata != NULL);
5146 relocation
5147 = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd,
5148 info, htab->sdata, h,
5149 relocation, rel,
5150 R_PPC_RELATIVE);
5151 break;
5152
5153 /* Indirect .sdata2 relocation. */
5154 case R_PPC_EMB_SDA2I16:
5155 BFD_ASSERT (htab->sdata2 != NULL);
5156 relocation
5157 = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd,
5158 info, htab->sdata2, h,
5159 relocation, rel,
5160 R_PPC_RELATIVE);
5161 break;
5162
5163 /* Handle the TOC16 reloc. We want to use the offset within the .got
5164 section, not the actual VMA. This is appropriate when generating
5165 an embedded ELF object, for which the .got section acts like the
5166 AIX .toc section. */
5167 case R_PPC_TOC16: /* phony GOT16 relocations */
5168 BFD_ASSERT (sec != (asection *) 0);
5169 BFD_ASSERT (bfd_is_und_section (sec)
5170 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
5171 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)
5172
5173 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
5174 break;
5175
5176 case R_PPC_PLTREL24:
5177 /* Relocation is to the entry for this symbol in the
5178 procedure linkage table. */
5179 BFD_ASSERT (h != NULL);
5180
5181 if (h->plt.offset == (bfd_vma) -1
5182 || htab->plt == NULL)
5183 {
5184 /* We didn't make a PLT entry for this symbol. This
5185 happens when statically linking PIC code, or when
5186 using -Bsymbolic. */
5187 break;
5188 }
5189
5190 unresolved_reloc = FALSE;
5191 relocation = (htab->plt->output_section->vma
5192 + htab->plt->output_offset
5193 + h->plt.offset);
5194 break;
5195
5196 /* Relocate against _SDA_BASE_. */
5197 case R_PPC_SDAREL16:
5198 {
5199 const char *name;
5200 const struct elf_link_hash_entry *sh;
5201
5202 BFD_ASSERT (sec != (asection *) 0);
5203 name = bfd_get_section_name (abfd, sec->output_section);
5204 if (! ((strncmp (name, ".sdata", 6) == 0
5205 && (name[6] == 0 || name[6] == '.'))
5206 || (strncmp (name, ".sbss", 5) == 0
5207 && (name[5] == 0 || name[5] == '.'))))
5208 {
5209 (*_bfd_error_handler) (_("%s: the target (%s) of a %s relocation is in the wrong output section (%s)"),
5210 bfd_archive_filename (input_bfd),
5211 sym_name,
5212 howto->name,
5213 name);
5214 }
5215 sh = htab->sdata->sym_hash;
5216 addend -= (sh->root.u.def.value
5217 + sh->root.u.def.section->output_section->vma
5218 + sh->root.u.def.section->output_offset);
5219 }
5220 break;
5221
5222 /* Relocate against _SDA2_BASE_. */
5223 case R_PPC_EMB_SDA2REL:
5224 {
5225 const char *name;
5226 const struct elf_link_hash_entry *sh;
5227
5228 BFD_ASSERT (sec != (asection *) 0);
5229 name = bfd_get_section_name (abfd, sec->output_section);
5230 if (! (strncmp (name, ".sdata2", 7) == 0
5231 || strncmp (name, ".sbss2", 6) == 0))
5232 {
5233 (*_bfd_error_handler) (_("%s: the target (%s) of a %s relocation is in the wrong output section (%s)"),
5234 bfd_archive_filename (input_bfd),
5235 sym_name,
5236 howto->name,
5237 name);
5238
5239 bfd_set_error (bfd_error_bad_value);
5240 ret = FALSE;
5241 continue;
5242 }
5243 sh = htab->sdata2->sym_hash;
5244 addend -= (sh->root.u.def.value
5245 + sh->root.u.def.section->output_section->vma
5246 + sh->root.u.def.section->output_offset);
5247 }
5248 break;
5249
5250 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
5251 case R_PPC_EMB_SDA21:
5252 case R_PPC_EMB_RELSDA:
5253 {
5254 const char *name;
5255 const struct elf_link_hash_entry *sh;
5256 int reg;
5257
5258 BFD_ASSERT (sec != (asection *) 0);
5259 name = bfd_get_section_name (abfd, sec->output_section);
5260 if (((strncmp (name, ".sdata", 6) == 0
5261 && (name[6] == 0 || name[6] == '.'))
5262 || (strncmp (name, ".sbss", 5) == 0
5263 && (name[5] == 0 || name[5] == '.'))))
5264 {
5265 reg = 13;
5266 sh = htab->sdata->sym_hash;
5267 addend -= (sh->root.u.def.value
5268 + sh->root.u.def.section->output_section->vma
5269 + sh->root.u.def.section->output_offset);
5270 }
5271
5272 else if (strncmp (name, ".sdata2", 7) == 0
5273 || strncmp (name, ".sbss2", 6) == 0)
5274 {
5275 reg = 2;
5276 sh = htab->sdata2->sym_hash;
5277 addend -= (sh->root.u.def.value
5278 + sh->root.u.def.section->output_section->vma
5279 + sh->root.u.def.section->output_offset);
5280 }
5281
5282 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
5283 || strcmp (name, ".PPC.EMB.sbss0") == 0)
5284 {
5285 reg = 0;
5286 }
5287
5288 else
5289 {
5290 (*_bfd_error_handler) (_("%s: the target (%s) of a %s relocation is in the wrong output section (%s)"),
5291 bfd_archive_filename (input_bfd),
5292 sym_name,
5293 howto->name,
5294 name);
5295
5296 bfd_set_error (bfd_error_bad_value);
5297 ret = FALSE;
5298 continue;
5299 }
5300
5301 if (r_type == R_PPC_EMB_SDA21)
5302 { /* fill in register field */
5303 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5304 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
5305 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5306 }
5307 }
5308 break;
5309
5310 /* Relocate against the beginning of the section. */
5311 case R_PPC_SECTOFF:
5312 case R_PPC_SECTOFF_LO:
5313 case R_PPC_SECTOFF_HI:
5314 case R_PPC_SECTOFF_HA:
5315 BFD_ASSERT (sec != (asection *) 0);
5316 addend -= sec->output_section->vma;
5317 break;
5318
5319 /* Negative relocations. */
5320 case R_PPC_EMB_NADDR32:
5321 case R_PPC_EMB_NADDR16:
5322 case R_PPC_EMB_NADDR16_LO:
5323 case R_PPC_EMB_NADDR16_HI:
5324 case R_PPC_EMB_NADDR16_HA:
5325 addend -= 2 * relocation;
5326 break;
5327
5328 case R_PPC_COPY:
5329 case R_PPC_GLOB_DAT:
5330 case R_PPC_JMP_SLOT:
5331 case R_PPC_RELATIVE:
5332 case R_PPC_PLT32:
5333 case R_PPC_PLTREL32:
5334 case R_PPC_PLT16_LO:
5335 case R_PPC_PLT16_HI:
5336 case R_PPC_PLT16_HA:
5337 case R_PPC_ADDR30:
5338 case R_PPC_EMB_RELSEC16:
5339 case R_PPC_EMB_RELST_LO:
5340 case R_PPC_EMB_RELST_HI:
5341 case R_PPC_EMB_RELST_HA:
5342 case R_PPC_EMB_BIT_FLD:
5343 (*_bfd_error_handler)
5344 (_("%s: relocation %s is not yet supported for symbol %s."),
5345 bfd_archive_filename (input_bfd),
5346 howto->name,
5347 sym_name);
5348
5349 bfd_set_error (bfd_error_invalid_operation);
5350 ret = FALSE;
5351 continue;
5352 }
5353
5354 /* Do any further special processing. */
5355 switch (r_type)
5356 {
5357 default:
5358 break;
5359
5360 case R_PPC_ADDR16_HA:
5361 case R_PPC_GOT16_HA:
5362 case R_PPC_PLT16_HA:
5363 case R_PPC_SECTOFF_HA:
5364 case R_PPC_TPREL16_HA:
5365 case R_PPC_DTPREL16_HA:
5366 case R_PPC_GOT_TLSGD16_HA:
5367 case R_PPC_GOT_TLSLD16_HA:
5368 case R_PPC_GOT_TPREL16_HA:
5369 case R_PPC_GOT_DTPREL16_HA:
5370 case R_PPC_EMB_NADDR16_HA:
5371 case R_PPC_EMB_RELST_HA:
5372 /* It's just possible that this symbol is a weak symbol
5373 that's not actually defined anywhere. In that case,
5374 'sec' would be NULL, and we should leave the symbol
5375 alone (it will be set to zero elsewhere in the link). */
5376 if (sec != NULL)
5377 /* Add 0x10000 if sign bit in 0:15 is set.
5378 Bits 0:15 are not used. */
5379 addend += 0x8000;
5380 break;
5381 }
5382
5383#ifdef DEBUG
5384 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n",
5385 howto->name,
5386 (int) r_type,
5387 sym_name,
5388 r_symndx,
5389 (long) rel->r_offset,
5390 (long) addend);
5391#endif
5392
5393 if (unresolved_reloc
5394 && !((input_section->flags & SEC_DEBUGGING) != 0
5395 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
5396 {
5397 (*_bfd_error_handler)
5398 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
5399 bfd_archive_filename (input_bfd),
5400 bfd_get_section_name (input_bfd, input_section),
5401 (long) rel->r_offset,
5402 howto->name,
5403 sym_name);
5404 ret = FALSE;
5405 }
5406
5407 r = _bfd_final_link_relocate (howto,
5408 input_bfd,
5409 input_section,
5410 contents,
5411 rel->r_offset,
5412 relocation,
5413 addend);
5414
5415 if (r != bfd_reloc_ok)
5416 {
5417 if (sym_name == NULL)
5418 sym_name = "(null)";
5419 if (r == bfd_reloc_overflow)
5420 {
5421 if (warned)
5422 continue;
5423 if (h != NULL
5424 && h->root.type == bfd_link_hash_undefweak
5425 && howto->pc_relative)
5426 {
5427 /* Assume this is a call protected by other code that
5428 detect the symbol is undefined. If this is the case,
5429 we can safely ignore the overflow. If not, the
5430 program is hosed anyway, and a little warning isn't
5431 going to help. */
5432
5433 continue;
5434 }
5435
5436 if (! (*info->callbacks->reloc_overflow) (info,
5437 sym_name,
5438 howto->name,
5439 rel->r_addend,
5440 input_bfd,
5441 input_section,
5442 rel->r_offset))
5443 return FALSE;
5444 }
5445 else
5446 {
5447 (*_bfd_error_handler)
5448 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
5449 bfd_archive_filename (input_bfd),
5450 bfd_get_section_name (input_bfd, input_section),
5451 (long) rel->r_offset, howto->name, sym_name, (int) r);
5452 ret = FALSE;
5453 }
5454 }
5455 }
5456
5457#ifdef DEBUG
5458 fprintf (stderr, "\n");
5459#endif
5460
5461 return ret;
5462}
5463
5464static enum elf_reloc_type_class
5465ppc_elf_reloc_type_class (rela)
5466 const Elf_Internal_Rela *rela;
5467{
5468 switch ((int) ELF32_R_TYPE (rela->r_info))
5469 {
5470 case R_PPC_RELATIVE:
5471 return reloc_class_relative;
5472 case R_PPC_REL24:
5473 case R_PPC_ADDR24:
5474 case R_PPC_JMP_SLOT:
5475 return reloc_class_plt;
5476 case R_PPC_COPY:
5477 return reloc_class_copy;
5478 default:
5479 return reloc_class_normal;
5480 }
5481}
5482
5483
5484/* Support for core dump NOTE sections. */
5485
5486static bfd_boolean
5487ppc_elf_grok_prstatus (abfd, note)
5488 bfd *abfd;
5489 Elf_Internal_Note *note;
5490{
5491 int offset;
5492 unsigned int raw_size;
5493
5494 switch (note->descsz)
5495 {
5496 default:
5497 return FALSE;
5498
5499 case 268: /* Linux/PPC. */
5500 /* pr_cursig */
5501 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
5502
5503 /* pr_pid */
5504 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
5505
5506 /* pr_reg */
5507 offset = 72;
5508 raw_size = 192;
5509
5510 break;
5511 }
5512
5513 /* Make a ".reg/999" section. */
5514 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
5515 raw_size, note->descpos + offset);
5516}
5517
5518static bfd_boolean
5519ppc_elf_grok_psinfo (abfd, note)
5520 bfd *abfd;
5521 Elf_Internal_Note *note;
5522{
5523 switch (note->descsz)
5524 {
5525 default:
5526 return FALSE;
5527
5528 case 128: /* Linux/PPC elf_prpsinfo. */
5529 elf_tdata (abfd)->core_program
5530 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
5531 elf_tdata (abfd)->core_command
5532 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
5533 }
5534
5535 /* Note that for some reason, a spurious space is tacked
5536 onto the end of the args in some (at least one anyway)
5537 implementations, so strip it off if it exists. */
5538
5539 {
5540 char *command = elf_tdata (abfd)->core_command;
5541 int n = strlen (command);
5542
5543 if (0 < n && command[n - 1] == ' ')
5544 command[n - 1] = '\0';
5545 }
5546
5547 return TRUE;
5548}
5549
5550
5551/* Very simple linked list structure for recording apuinfo values. */
5552typedef struct apuinfo_list
5553{
5554 struct apuinfo_list *next;
5555 unsigned long value;
5556}
5557apuinfo_list;
5558
5559static apuinfo_list * head;
5560
5561static void apuinfo_list_init PARAMS ((void));
5562static void apuinfo_list_add PARAMS ((unsigned long));
5563static unsigned apuinfo_list_length PARAMS ((void));
5564static unsigned long apuinfo_list_element PARAMS ((unsigned long));
5565static void apuinfo_list_finish PARAMS ((void));
5566
5567extern void ppc_elf_begin_write_processing
5568 PARAMS ((bfd *, struct bfd_link_info *));
5569extern void ppc_elf_final_write_processing
5570 PARAMS ((bfd *, bfd_boolean));
5571extern bfd_boolean ppc_elf_write_section
5572 PARAMS ((bfd *, asection *, bfd_byte *));
5573
5574
5575static void
5576apuinfo_list_init PARAMS ((void))
5577{
5578 head = NULL;
5579}
5580
5581static void
5582apuinfo_list_add (value)
5583 unsigned long value;
5584{
5585 apuinfo_list *entry = head;
5586
5587 while (entry != NULL)
5588 {
5589 if (entry->value == value)
5590 return;
5591 entry = entry->next;
5592 }
5593
5594 entry = bfd_malloc (sizeof (* entry));
5595 if (entry == NULL)
5596 return;
5597
5598 entry->value = value;
5599 entry->next = head;
5600 head = entry;
5601}
5602
5603static unsigned
5604apuinfo_list_length PARAMS ((void))
5605{
5606 apuinfo_list *entry;
5607 unsigned long count;
5608
5609 for (entry = head, count = 0;
5610 entry;
5611 entry = entry->next)
5612 ++ count;
5613
5614 return count;
5615}
5616
5617static inline unsigned long
5618apuinfo_list_element (number)
5619 unsigned long number;
5620{
5621 apuinfo_list * entry;
5622
5623 for (entry = head;
5624 entry && number --;
5625 entry = entry->next)
5626 ;
5627
5628 return entry ? entry->value : 0;
5629}
5630
5631static void
5632apuinfo_list_finish PARAMS ((void))
5633{
5634 apuinfo_list *entry;
5635
5636 for (entry = head; entry;)
5637 {
5638 apuinfo_list *next = entry->next;
5639 free (entry);
5640 entry = next;
5641 }
5642
5643 head = NULL;
5644}
5645
5646#define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
5647#define APUINFO_LABEL "APUinfo"
5648
5649/* Scan the input BFDs and create a linked list of
5650 the APUinfo values that will need to be emitted. */
5651
5652void
5653ppc_elf_begin_write_processing (abfd, link_info)
5654 bfd *abfd;
5655 struct bfd_link_info *link_info;
5656{
5657 bfd *ibfd;
5658 asection *asec;
5659 char *buffer;
5660 unsigned num_input_sections;
5661 bfd_size_type output_section_size;
5662 unsigned i;
5663 unsigned num_entries;
5664 unsigned long offset;
5665 unsigned long length;
5666 const char *error_message = NULL;
5667
5668 if (link_info == NULL)
5669 return;
5670
5671 /* Scan the input bfds, looking for apuinfo sections. */
5672 num_input_sections = 0;
5673 output_section_size = 0;
5674
5675 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5676 {
5677 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
5678 if (asec)
5679 {
5680 ++ num_input_sections;
5681 output_section_size += asec->_raw_size;
5682 }
5683 }
5684
5685 /* We need at least one input sections
5686 in order to make merging worthwhile. */
5687 if (num_input_sections < 1)
5688 return;
5689
5690 /* Just make sure that the output section exists as well. */
5691 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
5692 if (asec == NULL)
5693 return;
5694
5695 /* Allocate a buffer for the contents of the input sections. */
5696 buffer = bfd_malloc (output_section_size);
5697 if (buffer == NULL)
5698 return;
5699
5700 offset = 0;
5701 apuinfo_list_init ();
5702
5703 /* Read in the input sections contents. */
5704 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5705 {
5706 unsigned long datum;
5707 char *ptr;
5708
5709 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
5710 if (asec == NULL)
5711 continue;
5712
5713 length = asec->_raw_size;
5714 if (length < 24)
5715 {
5716 error_message = _("corrupt or empty %s section in %s");
5717 goto fail;
5718 }
5719
5720 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
5721 || (bfd_bread (buffer + offset, length, ibfd) != length))
5722 {
5723 error_message = _("unable to read in %s section from %s");
5724 goto fail;
5725 }
5726
5727 /* Process the contents of the section. */
5728 ptr = buffer + offset;
5729 error_message = _("corrupt %s section in %s");
5730
5731 /* Verify the contents of the header. Note - we have to
5732 extract the values this way in order to allow for a
5733 host whose endian-ness is different from the target. */
5734 datum = bfd_get_32 (ibfd, ptr);
5735 if (datum != sizeof APUINFO_LABEL)
5736 goto fail;
5737
5738 datum = bfd_get_32 (ibfd, ptr + 8);
5739 if (datum != 0x2)
5740 goto fail;
5741
5742 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
5743 goto fail;
5744
5745 /* Get the number of apuinfo entries. */
5746 datum = bfd_get_32 (ibfd, ptr + 4);
5747 if ((datum * 4 + 20) != length)
5748 goto fail;
5749
5750 /* Make sure that we do not run off the end of the section. */
5751 if (offset + length > output_section_size)
5752 goto fail;
5753
5754 /* Scan the apuinfo section, building a list of apuinfo numbers. */
5755 for (i = 0; i < datum; i++)
5756 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + (i * 4)));
5757
5758 /* Update the offset. */
5759 offset += length;
5760 }
5761
5762 error_message = NULL;
5763
5764 /* Compute the size of the output section. */
5765 num_entries = apuinfo_list_length ();
5766 output_section_size = 20 + num_entries * 4;
5767
5768 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
5769
5770 if (! bfd_set_section_size (abfd, asec, output_section_size))
5771 ibfd = abfd,
5772 error_message = _("warning: unable to set size of %s section in %s");
5773
5774 fail:
5775 free (buffer);
5776
5777 if (error_message)
5778 (*_bfd_error_handler) (error_message, APUINFO_SECTION_NAME,
5779 bfd_archive_filename (ibfd));
5780}
5781
5782
5783/* Prevent the output section from accumulating the input sections'
5784 contents. We have already stored this in our linked list structure. */
5785
5786bfd_boolean
5787ppc_elf_write_section (abfd, asec, contents)
5788 bfd *abfd ATTRIBUTE_UNUSED;
5789 asection *asec;
5790 bfd_byte *contents ATTRIBUTE_UNUSED;
5791{
5792 return (apuinfo_list_length ()
5793 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
5794}
5795
5796
5797/* Finally we can generate the output section. */
5798
5799void
5800ppc_elf_final_write_processing (abfd, linker)
5801 bfd *abfd;
5802 bfd_boolean linker ATTRIBUTE_UNUSED;
5803{
5804 bfd_byte *buffer;
5805 asection *asec;
5806 unsigned i;
5807 unsigned num_entries;
5808 bfd_size_type length;
5809
5810 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
5811 if (asec == NULL)
5812 return;
5813
5814 if (apuinfo_list_length () == 0)
5815 return;
5816
5817 length = asec->_raw_size;
5818 if (length < 20)
5819 return;
5820
5821 buffer = bfd_malloc (length);
5822 if (buffer == NULL)
5823 {
5824 (*_bfd_error_handler)
5825 (_("failed to allocate space for new APUinfo section."));
5826 return;
5827 }
5828
5829 /* Create the apuinfo header. */
5830 num_entries = apuinfo_list_length ();
5831 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
5832 bfd_put_32 (abfd, num_entries, buffer + 4);
5833 bfd_put_32 (abfd, 0x2, buffer + 8);
5834 strcpy (buffer + 12, APUINFO_LABEL);
5835
5836 length = 20;
5837 for (i = 0; i < num_entries; i++)
5838 {
5839 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
5840 length += 4;
5841 }
5842
5843 if (length != asec->_raw_size)
5844 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
5845
5846 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
5847 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
5848
5849 free (buffer);
5850
5851 apuinfo_list_finish ();
5852}
5853
5854
5855#define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
5856#define TARGET_LITTLE_NAME "elf32-powerpcle"
5857#define TARGET_BIG_SYM bfd_elf32_powerpc_vec
5858#define TARGET_BIG_NAME "elf32-powerpc"
5859#define ELF_ARCH bfd_arch_powerpc
5860#define ELF_MACHINE_CODE EM_PPC
5861#define ELF_MAXPAGESIZE 0x10000
5862#define elf_info_to_howto ppc_elf_info_to_howto
5863
5864#ifdef EM_CYGNUS_POWERPC
5865#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
5866#endif
5867
5868#ifdef EM_PPC_OLD
5869#define ELF_MACHINE_ALT2 EM_PPC_OLD
5870#endif
5871
5872#define elf_backend_plt_not_loaded 1
5873#define elf_backend_got_symbol_offset 4
5874#define elf_backend_can_gc_sections 1
5875#define elf_backend_can_refcount 1
5876#define elf_backend_got_header_size 12
5877#define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
5878#define elf_backend_rela_normal 1
5879
5880#define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
5881#define bfd_elf32_bfd_relax_section ppc_elf_relax_section
5882#define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
5883#define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
5884#define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
5885
5886#define elf_backend_object_p ppc_elf_object_p
5887#define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
5888#define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
5889#define elf_backend_section_from_shdr ppc_elf_section_from_shdr
5890#define elf_backend_relocate_section ppc_elf_relocate_section
5891#define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
5892#define elf_backend_check_relocs ppc_elf_check_relocs
5893#define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
5894#define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
5895#define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
5896#define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
5897#define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
5898#define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
5899#define elf_backend_fake_sections ppc_elf_fake_sections
5900#define elf_backend_additional_program_headers ppc_elf_additional_program_headers
5901#define elf_backend_modify_segment_map ppc_elf_modify_segment_map
5902#define elf_backend_grok_prstatus ppc_elf_grok_prstatus
5903#define elf_backend_grok_psinfo ppc_elf_grok_psinfo
5904#define elf_backend_reloc_type_class ppc_elf_reloc_type_class
5905#define elf_backend_begin_write_processing ppc_elf_begin_write_processing
5906#define elf_backend_final_write_processing ppc_elf_final_write_processing
5907#define elf_backend_write_section ppc_elf_write_section
5908
5909#include "elf32-target.h"
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