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* elf-bfd.h (elf_backend_data::elf_backend_modify_segment_map):
[binutils.git] / bfd / elf32-ppc.c
blob9dcc2ea0269a77e0241c3ded5a40549f380842f3
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
38 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc_elf_unhandled_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42
43 /* Branch prediction bit for branch taken relocs. */
44 #define BRANCH_PREDICT_BIT 0x200000
45 /* Mask to set RA in memory instructions. */
46 #define RA_REGISTER_MASK 0x001f0000
47 /* Value to shift register by to insert RA. */
48 #define RA_REGISTER_SHIFT 16
49
50 /* The name of the dynamic interpreter. This is put in the .interp
51 section. */
52 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
53
54 /* The size in bytes of an entry in the procedure linkage table. */
55 #define PLT_ENTRY_SIZE 12
56 /* The initial size of the plt reserved for the dynamic linker. */
57 #define PLT_INITIAL_ENTRY_SIZE 72
58 /* The size of the gap between entries in the PLT. */
59 #define PLT_SLOT_SIZE 8
60 /* The number of single-slot PLT entries (the rest use two slots). */
61 #define PLT_NUM_SINGLE_ENTRIES 8192
62
63 /* Some nop instructions. */
64 #define NOP 0x60000000
65 #define CROR_151515 0x4def7b82
66 #define CROR_313131 0x4ffffb82
67
68 /* Offset of tp and dtp pointers from start of TLS block. */
69 #define TP_OFFSET 0x7000
70 #define DTP_OFFSET 0x8000
71
72 \f
73 /* Enumeration to specify the special section. */
74 enum elf_linker_section_enum
75 {
76 LINKER_SECTION_SDATA,
77 LINKER_SECTION_SDATA2
78 };
79
80 /* Sections created by the linker. */
81
82 typedef struct elf_linker_section
83 {
84 /* pointer to the section */
85 asection *section;
86 /* pointer to the relocations needed for this section */
87 asection *rel_section;
88 /* pointer to the created symbol hash value */
89 struct elf_link_hash_entry *sym_hash;
90 /* offset of symbol from beginning of section */
91 bfd_vma sym_offset;
92 } elf_linker_section_t;
93
94 /* Linked list of allocated pointer entries. This hangs off of the
95 symbol lists, and provides allows us to return different pointers,
96 based on different addend's. */
97
98 typedef struct elf_linker_section_pointers
99 {
100 /* next allocated pointer for this symbol */
101 struct elf_linker_section_pointers *next;
102 /* offset of pointer from beginning of section */
103 bfd_vma offset;
104 /* addend used */
105 bfd_vma addend;
106 /* which linker section this is */
107 elf_linker_section_t *lsect;
108 /* whether address was written yet */
109 bfd_boolean written_address_p;
110 } elf_linker_section_pointers_t;
111
112 struct ppc_elf_obj_tdata
113 {
114 struct elf_obj_tdata elf;
115
116 /* A mapping from local symbols to offsets into the various linker
117 sections added. This is index by the symbol index. */
118 elf_linker_section_pointers_t **linker_section_pointers;
119 };
120
121 #define ppc_elf_tdata(bfd) \
122 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
123
124 #define elf_local_ptr_offsets(bfd) \
125 (ppc_elf_tdata (bfd)->linker_section_pointers)
126
127 /* Override the generic function because we store some extras. */
128
129 static bfd_boolean
130 ppc_elf_mkobject (bfd *abfd)
131 {
132 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
133 abfd->tdata.any = bfd_zalloc (abfd, amt);
134 if (abfd->tdata.any == NULL)
135 return FALSE;
136 return TRUE;
137 }
138
139 /* The PPC linker needs to keep track of the number of relocs that it
140 decides to copy as dynamic relocs in check_relocs for each symbol.
141 This is so that it can later discard them if they are found to be
142 unnecessary. We store the information in a field extending the
143 regular ELF linker hash table. */
144
145 struct ppc_elf_dyn_relocs
146 {
147 struct ppc_elf_dyn_relocs *next;
148
149 /* The input section of the reloc. */
150 asection *sec;
151
152 /* Total number of relocs copied for the input section. */
153 bfd_size_type count;
154
155 /* Number of pc-relative relocs copied for the input section. */
156 bfd_size_type pc_count;
157 };
158
159 /* PPC ELF linker hash entry. */
160
161 struct ppc_elf_link_hash_entry
162 {
163 struct elf_link_hash_entry elf;
164
165 /* If this symbol is used in the linker created sections, the processor
166 specific backend uses this field to map the field into the offset
167 from the beginning of the section. */
168 elf_linker_section_pointers_t *linker_section_pointer;
169
170 /* Track dynamic relocs copied for this symbol. */
171 struct ppc_elf_dyn_relocs *dyn_relocs;
172
173 /* Contexts in which symbol is used in the GOT (or TOC).
174 TLS_GD .. TLS_TLS bits are or'd into the mask as the
175 corresponding relocs are encountered during check_relocs.
176 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
177 indicate the corresponding GOT entry type is not needed. */
178 #define TLS_GD 1 /* GD reloc. */
179 #define TLS_LD 2 /* LD reloc. */
180 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
181 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
182 #define TLS_TLS 16 /* Any TLS reloc. */
183 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
184 char tls_mask;
185 };
186
187 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
188
189 /* PPC ELF linker hash table. */
190
191 struct ppc_elf_link_hash_table
192 {
193 struct elf_link_hash_table elf;
194
195 /* Short-cuts to get to dynamic linker sections. */
196 asection *got;
197 asection *relgot;
198 asection *plt;
199 asection *relplt;
200 asection *dynbss;
201 asection *relbss;
202 asection *dynsbss;
203 asection *relsbss;
204 elf_linker_section_t *sdata;
205 elf_linker_section_t *sdata2;
206 asection *sbss;
207
208 /* Shortcut to .__tls_get_addr. */
209 struct elf_link_hash_entry *tls_get_addr;
210
211 /* TLS local dynamic got entry handling. */
212 union {
213 bfd_signed_vma refcount;
214 bfd_vma offset;
215 } tlsld_got;
216
217 /* Small local sym to section mapping cache. */
218 struct sym_sec_cache sym_sec;
219 };
220
221 /* Get the PPC ELF linker hash table from a link_info structure. */
222
223 #define ppc_elf_hash_table(p) \
224 ((struct ppc_elf_link_hash_table *) (p)->hash)
225
226 /* Create an entry in a PPC ELF linker hash table. */
227
228 static struct bfd_hash_entry *
229 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
230 struct bfd_hash_table *table,
231 const char *string)
232 {
233 /* Allocate the structure if it has not already been allocated by a
234 subclass. */
235 if (entry == NULL)
236 {
237 entry = bfd_hash_allocate (table,
238 sizeof (struct ppc_elf_link_hash_entry));
239 if (entry == NULL)
240 return entry;
241 }
242
243 /* Call the allocation method of the superclass. */
244 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
245 if (entry != NULL)
246 {
247 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
248 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
249 ppc_elf_hash_entry (entry)->tls_mask = 0;
250 }
251
252 return entry;
253 }
254
255 /* Create a PPC ELF linker hash table. */
256
257 static struct bfd_link_hash_table *
258 ppc_elf_link_hash_table_create (bfd *abfd)
259 {
260 struct ppc_elf_link_hash_table *ret;
261
262 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
263 if (ret == NULL)
264 return NULL;
265
266 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
267 ppc_elf_link_hash_newfunc))
268 {
269 free (ret);
270 return NULL;
271 }
272
273 return &ret->elf.root;
274 }
275
276 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
277 copying dynamic variables from a shared lib into an app's dynbss
278 section, and instead use a dynamic relocation to point into the
279 shared lib. */
280 #define ELIMINATE_COPY_RELOCS 1
281
282 /* Copy the extra info we tack onto an elf_link_hash_entry. */
283
284 static void
285 ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed,
286 struct elf_link_hash_entry *dir,
287 struct elf_link_hash_entry *ind)
288 {
289 struct ppc_elf_link_hash_entry *edir, *eind;
290
291 edir = (struct ppc_elf_link_hash_entry *) dir;
292 eind = (struct ppc_elf_link_hash_entry *) ind;
293
294 if (eind->dyn_relocs != NULL)
295 {
296 if (edir->dyn_relocs != NULL)
297 {
298 struct ppc_elf_dyn_relocs **pp;
299 struct ppc_elf_dyn_relocs *p;
300
301 if (ind->root.type == bfd_link_hash_indirect)
302 abort ();
303
304 /* Add reloc counts against the weak sym to the strong sym
305 list. Merge any entries against the same section. */
306 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
307 {
308 struct ppc_elf_dyn_relocs *q;
309
310 for (q = edir->dyn_relocs; q != NULL; q = q->next)
311 if (q->sec == p->sec)
312 {
313 q->pc_count += p->pc_count;
314 q->count += p->count;
315 *pp = p->next;
316 break;
317 }
318 if (q == NULL)
319 pp = &p->next;
320 }
321 *pp = edir->dyn_relocs;
322 }
323
324 edir->dyn_relocs = eind->dyn_relocs;
325 eind->dyn_relocs = NULL;
326 }
327
328 edir->tls_mask |= eind->tls_mask;
329
330 if (ELIMINATE_COPY_RELOCS
331 && ind->root.type != bfd_link_hash_indirect
332 && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
333 /* If called to transfer flags for a weakdef during processing
334 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
335 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
336 dir->elf_link_hash_flags |=
337 (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
338 | ELF_LINK_HASH_REF_REGULAR
339 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
340 | ELF_LINK_HASH_NEEDS_PLT));
341 else
342 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
343 }
344 \f
345 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
346
347 static reloc_howto_type ppc_elf_howto_raw[] = {
348 /* This reloc does nothing. */
349 HOWTO (R_PPC_NONE, /* type */
350 0, /* rightshift */
351 2, /* size (0 = byte, 1 = short, 2 = long) */
352 32, /* bitsize */
353 FALSE, /* pc_relative */
354 0, /* bitpos */
355 complain_overflow_bitfield, /* complain_on_overflow */
356 bfd_elf_generic_reloc, /* special_function */
357 "R_PPC_NONE", /* name */
358 FALSE, /* partial_inplace */
359 0, /* src_mask */
360 0, /* dst_mask */
361 FALSE), /* pcrel_offset */
362
363 /* A standard 32 bit relocation. */
364 HOWTO (R_PPC_ADDR32, /* type */
365 0, /* rightshift */
366 2, /* size (0 = byte, 1 = short, 2 = long) */
367 32, /* bitsize */
368 FALSE, /* pc_relative */
369 0, /* bitpos */
370 complain_overflow_bitfield, /* complain_on_overflow */
371 bfd_elf_generic_reloc, /* special_function */
372 "R_PPC_ADDR32", /* name */
373 FALSE, /* partial_inplace */
374 0, /* src_mask */
375 0xffffffff, /* dst_mask */
376 FALSE), /* pcrel_offset */
377
378 /* An absolute 26 bit branch; the lower two bits must be zero.
379 FIXME: we don't check that, we just clear them. */
380 HOWTO (R_PPC_ADDR24, /* type */
381 0, /* rightshift */
382 2, /* size (0 = byte, 1 = short, 2 = long) */
383 26, /* bitsize */
384 FALSE, /* pc_relative */
385 0, /* bitpos */
386 complain_overflow_bitfield, /* complain_on_overflow */
387 bfd_elf_generic_reloc, /* special_function */
388 "R_PPC_ADDR24", /* name */
389 FALSE, /* partial_inplace */
390 0, /* src_mask */
391 0x3fffffc, /* dst_mask */
392 FALSE), /* pcrel_offset */
393
394 /* A standard 16 bit relocation. */
395 HOWTO (R_PPC_ADDR16, /* type */
396 0, /* rightshift */
397 1, /* size (0 = byte, 1 = short, 2 = long) */
398 16, /* bitsize */
399 FALSE, /* pc_relative */
400 0, /* bitpos */
401 complain_overflow_bitfield, /* complain_on_overflow */
402 bfd_elf_generic_reloc, /* special_function */
403 "R_PPC_ADDR16", /* name */
404 FALSE, /* partial_inplace */
405 0, /* src_mask */
406 0xffff, /* dst_mask */
407 FALSE), /* pcrel_offset */
408
409 /* A 16 bit relocation without overflow. */
410 HOWTO (R_PPC_ADDR16_LO, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_dont,/* complain_on_overflow */
417 bfd_elf_generic_reloc, /* special_function */
418 "R_PPC_ADDR16_LO", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* The high order 16 bits of an address. */
425 HOWTO (R_PPC_ADDR16_HI, /* type */
426 16, /* rightshift */
427 1, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 FALSE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_dont, /* complain_on_overflow */
432 bfd_elf_generic_reloc, /* special_function */
433 "R_PPC_ADDR16_HI", /* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0xffff, /* dst_mask */
437 FALSE), /* pcrel_offset */
438
439 /* The high order 16 bits of an address, plus 1 if the contents of
440 the low 16 bits, treated as a signed number, is negative. */
441 HOWTO (R_PPC_ADDR16_HA, /* type */
442 16, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_dont, /* complain_on_overflow */
448 ppc_elf_addr16_ha_reloc, /* special_function */
449 "R_PPC_ADDR16_HA", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* An absolute 16 bit branch; the lower two bits must be zero.
456 FIXME: we don't check that, we just clear them. */
457 HOWTO (R_PPC_ADDR14, /* type */
458 0, /* rightshift */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_bitfield, /* complain_on_overflow */
464 bfd_elf_generic_reloc, /* special_function */
465 "R_PPC_ADDR14", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xfffc, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* An absolute 16 bit branch, for which bit 10 should be set to
472 indicate that the branch is expected to be taken. The lower two
473 bits must be zero. */
474 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 16, /* bitsize */
478 FALSE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_bitfield, /* complain_on_overflow */
481 bfd_elf_generic_reloc, /* special_function */
482 "R_PPC_ADDR14_BRTAKEN",/* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0xfffc, /* dst_mask */
486 FALSE), /* pcrel_offset */
487
488 /* An absolute 16 bit branch, for which bit 10 should be set to
489 indicate that the branch is not expected to be taken. The lower
490 two bits must be zero. */
491 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
492 0, /* rightshift */
493 2, /* size (0 = byte, 1 = short, 2 = long) */
494 16, /* bitsize */
495 FALSE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_bitfield, /* complain_on_overflow */
498 bfd_elf_generic_reloc, /* special_function */
499 "R_PPC_ADDR14_BRNTAKEN",/* name */
500 FALSE, /* partial_inplace */
501 0, /* src_mask */
502 0xfffc, /* dst_mask */
503 FALSE), /* pcrel_offset */
504
505 /* A relative 26 bit branch; the lower two bits must be zero. */
506 HOWTO (R_PPC_REL24, /* type */
507 0, /* rightshift */
508 2, /* size (0 = byte, 1 = short, 2 = long) */
509 26, /* bitsize */
510 TRUE, /* pc_relative */
511 0, /* bitpos */
512 complain_overflow_signed, /* complain_on_overflow */
513 bfd_elf_generic_reloc, /* special_function */
514 "R_PPC_REL24", /* name */
515 FALSE, /* partial_inplace */
516 0, /* src_mask */
517 0x3fffffc, /* dst_mask */
518 TRUE), /* pcrel_offset */
519
520 /* A relative 16 bit branch; the lower two bits must be zero. */
521 HOWTO (R_PPC_REL14, /* type */
522 0, /* rightshift */
523 2, /* size (0 = byte, 1 = short, 2 = long) */
524 16, /* bitsize */
525 TRUE, /* pc_relative */
526 0, /* bitpos */
527 complain_overflow_signed, /* complain_on_overflow */
528 bfd_elf_generic_reloc, /* special_function */
529 "R_PPC_REL14", /* name */
530 FALSE, /* partial_inplace */
531 0, /* src_mask */
532 0xfffc, /* dst_mask */
533 TRUE), /* pcrel_offset */
534
535 /* A relative 16 bit branch. Bit 10 should be set to indicate that
536 the branch is expected to be taken. The lower two bits must be
537 zero. */
538 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
539 0, /* rightshift */
540 2, /* size (0 = byte, 1 = short, 2 = long) */
541 16, /* bitsize */
542 TRUE, /* pc_relative */
543 0, /* bitpos */
544 complain_overflow_signed, /* complain_on_overflow */
545 bfd_elf_generic_reloc, /* special_function */
546 "R_PPC_REL14_BRTAKEN", /* name */
547 FALSE, /* partial_inplace */
548 0, /* src_mask */
549 0xfffc, /* dst_mask */
550 TRUE), /* pcrel_offset */
551
552 /* A relative 16 bit branch. Bit 10 should be set to indicate that
553 the branch is not expected to be taken. The lower two bits must
554 be zero. */
555 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
556 0, /* rightshift */
557 2, /* size (0 = byte, 1 = short, 2 = long) */
558 16, /* bitsize */
559 TRUE, /* pc_relative */
560 0, /* bitpos */
561 complain_overflow_signed, /* complain_on_overflow */
562 bfd_elf_generic_reloc, /* special_function */
563 "R_PPC_REL14_BRNTAKEN",/* name */
564 FALSE, /* partial_inplace */
565 0, /* src_mask */
566 0xfffc, /* dst_mask */
567 TRUE), /* pcrel_offset */
568
569 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
570 symbol. */
571 HOWTO (R_PPC_GOT16, /* type */
572 0, /* rightshift */
573 1, /* size (0 = byte, 1 = short, 2 = long) */
574 16, /* bitsize */
575 FALSE, /* pc_relative */
576 0, /* bitpos */
577 complain_overflow_signed, /* complain_on_overflow */
578 bfd_elf_generic_reloc, /* special_function */
579 "R_PPC_GOT16", /* name */
580 FALSE, /* partial_inplace */
581 0, /* src_mask */
582 0xffff, /* dst_mask */
583 FALSE), /* pcrel_offset */
584
585 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
586 the symbol. */
587 HOWTO (R_PPC_GOT16_LO, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_dont, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC_GOT16_LO", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
602 the symbol. */
603 HOWTO (R_PPC_GOT16_HI, /* type */
604 16, /* rightshift */
605 1, /* size (0 = byte, 1 = short, 2 = long) */
606 16, /* bitsize */
607 FALSE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_bitfield, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_GOT16_HI", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffff, /* dst_mask */
615 FALSE), /* pcrel_offset */
616
617 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
618 the symbol. */
619 HOWTO (R_PPC_GOT16_HA, /* type */
620 16, /* rightshift */
621 1, /* size (0 = byte, 1 = short, 2 = long) */
622 16, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_bitfield, /* complain_on_overflow */
626 ppc_elf_addr16_ha_reloc, /* special_function */
627 "R_PPC_GOT16_HA", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0xffff, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* Like R_PPC_REL24, but referring to the procedure linkage table
634 entry for the symbol. */
635 HOWTO (R_PPC_PLTREL24, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 26, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_signed, /* complain_on_overflow */
642 bfd_elf_generic_reloc, /* special_function */
643 "R_PPC_PLTREL24", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0x3fffffc, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* This is used only by the dynamic linker. The symbol should exist
650 both in the object being run and in some shared library. The
651 dynamic linker copies the data addressed by the symbol from the
652 shared library into the object, because the object being
653 run has to have the data at some particular address. */
654 HOWTO (R_PPC_COPY, /* type */
655 0, /* rightshift */
656 2, /* size (0 = byte, 1 = short, 2 = long) */
657 32, /* bitsize */
658 FALSE, /* pc_relative */
659 0, /* bitpos */
660 complain_overflow_bitfield, /* complain_on_overflow */
661 bfd_elf_generic_reloc, /* special_function */
662 "R_PPC_COPY", /* name */
663 FALSE, /* partial_inplace */
664 0, /* src_mask */
665 0, /* dst_mask */
666 FALSE), /* pcrel_offset */
667
668 /* Like R_PPC_ADDR32, but used when setting global offset table
669 entries. */
670 HOWTO (R_PPC_GLOB_DAT, /* type */
671 0, /* rightshift */
672 2, /* size (0 = byte, 1 = short, 2 = long) */
673 32, /* bitsize */
674 FALSE, /* pc_relative */
675 0, /* bitpos */
676 complain_overflow_bitfield, /* complain_on_overflow */
677 bfd_elf_generic_reloc, /* special_function */
678 "R_PPC_GLOB_DAT", /* name */
679 FALSE, /* partial_inplace */
680 0, /* src_mask */
681 0xffffffff, /* dst_mask */
682 FALSE), /* pcrel_offset */
683
684 /* Marks a procedure linkage table entry for a symbol. */
685 HOWTO (R_PPC_JMP_SLOT, /* type */
686 0, /* rightshift */
687 2, /* size (0 = byte, 1 = short, 2 = long) */
688 32, /* bitsize */
689 FALSE, /* pc_relative */
690 0, /* bitpos */
691 complain_overflow_bitfield, /* complain_on_overflow */
692 bfd_elf_generic_reloc, /* special_function */
693 "R_PPC_JMP_SLOT", /* name */
694 FALSE, /* partial_inplace */
695 0, /* src_mask */
696 0, /* dst_mask */
697 FALSE), /* pcrel_offset */
698
699 /* Used only by the dynamic linker. When the object is run, this
700 longword is set to the load address of the object, plus the
701 addend. */
702 HOWTO (R_PPC_RELATIVE, /* 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_RELATIVE", /* name */
711 FALSE, /* partial_inplace */
712 0, /* src_mask */
713 0xffffffff, /* dst_mask */
714 FALSE), /* pcrel_offset */
715
716 /* Like R_PPC_REL24, but uses the value of the symbol within the
717 object rather than the final value. Normally used for
718 _GLOBAL_OFFSET_TABLE_. */
719 HOWTO (R_PPC_LOCAL24PC, /* type */
720 0, /* rightshift */
721 2, /* size (0 = byte, 1 = short, 2 = long) */
722 26, /* bitsize */
723 TRUE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_signed, /* complain_on_overflow */
726 bfd_elf_generic_reloc, /* special_function */
727 "R_PPC_LOCAL24PC", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0x3fffffc, /* dst_mask */
731 TRUE), /* pcrel_offset */
732
733 /* Like R_PPC_ADDR32, but may be unaligned. */
734 HOWTO (R_PPC_UADDR32, /* type */
735 0, /* rightshift */
736 2, /* size (0 = byte, 1 = short, 2 = long) */
737 32, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_bitfield, /* complain_on_overflow */
741 bfd_elf_generic_reloc, /* special_function */
742 "R_PPC_UADDR32", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffffffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* Like R_PPC_ADDR16, but may be unaligned. */
749 HOWTO (R_PPC_UADDR16, /* type */
750 0, /* rightshift */
751 1, /* size (0 = byte, 1 = short, 2 = long) */
752 16, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_bitfield, /* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_PPC_UADDR16", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0xffff, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* 32-bit PC relative */
764 HOWTO (R_PPC_REL32, /* type */
765 0, /* rightshift */
766 2, /* size (0 = byte, 1 = short, 2 = long) */
767 32, /* bitsize */
768 TRUE, /* pc_relative */
769 0, /* bitpos */
770 complain_overflow_bitfield, /* complain_on_overflow */
771 bfd_elf_generic_reloc, /* special_function */
772 "R_PPC_REL32", /* name */
773 FALSE, /* partial_inplace */
774 0, /* src_mask */
775 0xffffffff, /* dst_mask */
776 TRUE), /* pcrel_offset */
777
778 /* 32-bit relocation to the symbol's procedure linkage table.
779 FIXME: not supported. */
780 HOWTO (R_PPC_PLT32, /* type */
781 0, /* rightshift */
782 2, /* size (0 = byte, 1 = short, 2 = long) */
783 32, /* bitsize */
784 FALSE, /* pc_relative */
785 0, /* bitpos */
786 complain_overflow_bitfield, /* complain_on_overflow */
787 bfd_elf_generic_reloc, /* special_function */
788 "R_PPC_PLT32", /* name */
789 FALSE, /* partial_inplace */
790 0, /* src_mask */
791 0, /* dst_mask */
792 FALSE), /* pcrel_offset */
793
794 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
795 FIXME: not supported. */
796 HOWTO (R_PPC_PLTREL32, /* type */
797 0, /* rightshift */
798 2, /* size (0 = byte, 1 = short, 2 = long) */
799 32, /* bitsize */
800 TRUE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_bitfield, /* complain_on_overflow */
803 bfd_elf_generic_reloc, /* special_function */
804 "R_PPC_PLTREL32", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0, /* dst_mask */
808 TRUE), /* pcrel_offset */
809
810 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
811 the symbol. */
812 HOWTO (R_PPC_PLT16_LO, /* type */
813 0, /* rightshift */
814 1, /* size (0 = byte, 1 = short, 2 = long) */
815 16, /* bitsize */
816 FALSE, /* pc_relative */
817 0, /* bitpos */
818 complain_overflow_dont, /* complain_on_overflow */
819 bfd_elf_generic_reloc, /* special_function */
820 "R_PPC_PLT16_LO", /* name */
821 FALSE, /* partial_inplace */
822 0, /* src_mask */
823 0xffff, /* dst_mask */
824 FALSE), /* pcrel_offset */
825
826 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
827 the symbol. */
828 HOWTO (R_PPC_PLT16_HI, /* type */
829 16, /* rightshift */
830 1, /* size (0 = byte, 1 = short, 2 = long) */
831 16, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_bitfield, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC_PLT16_HI", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 0xffff, /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
843 the symbol. */
844 HOWTO (R_PPC_PLT16_HA, /* type */
845 16, /* rightshift */
846 1, /* size (0 = byte, 1 = short, 2 = long) */
847 16, /* bitsize */
848 FALSE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_bitfield, /* complain_on_overflow */
851 ppc_elf_addr16_ha_reloc, /* special_function */
852 "R_PPC_PLT16_HA", /* name */
853 FALSE, /* partial_inplace */
854 0, /* src_mask */
855 0xffff, /* dst_mask */
856 FALSE), /* pcrel_offset */
857
858 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
859 small data items. */
860 HOWTO (R_PPC_SDAREL16, /* 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_signed, /* complain_on_overflow */
867 bfd_elf_generic_reloc, /* special_function */
868 "R_PPC_SDAREL16", /* name */
869 FALSE, /* partial_inplace */
870 0, /* src_mask */
871 0xffff, /* dst_mask */
872 FALSE), /* pcrel_offset */
873
874 /* 16-bit section relative relocation. */
875 HOWTO (R_PPC_SECTOFF, /* type */
876 0, /* rightshift */
877 1, /* size (0 = byte, 1 = short, 2 = long) */
878 16, /* bitsize */
879 FALSE, /* pc_relative */
880 0, /* bitpos */
881 complain_overflow_bitfield, /* complain_on_overflow */
882 bfd_elf_generic_reloc, /* special_function */
883 "R_PPC_SECTOFF", /* name */
884 FALSE, /* partial_inplace */
885 0, /* src_mask */
886 0xffff, /* dst_mask */
887 FALSE), /* pcrel_offset */
888
889 /* 16-bit lower half section relative relocation. */
890 HOWTO (R_PPC_SECTOFF_LO, /* type */
891 0, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 bfd_elf_generic_reloc, /* special_function */
898 "R_PPC_SECTOFF_LO", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* 16-bit upper half section relative relocation. */
905 HOWTO (R_PPC_SECTOFF_HI, /* type */
906 16, /* rightshift */
907 1, /* size (0 = byte, 1 = short, 2 = long) */
908 16, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_bitfield, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC_SECTOFF_HI", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 0xffff, /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* 16-bit upper half adjusted section relative relocation. */
920 HOWTO (R_PPC_SECTOFF_HA, /* type */
921 16, /* rightshift */
922 1, /* size (0 = byte, 1 = short, 2 = long) */
923 16, /* bitsize */
924 FALSE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_bitfield, /* complain_on_overflow */
927 ppc_elf_addr16_ha_reloc, /* special_function */
928 "R_PPC_SECTOFF_HA", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 0xffff, /* dst_mask */
932 FALSE), /* pcrel_offset */
933
934 /* Marker reloc for TLS. */
935 HOWTO (R_PPC_TLS,
936 0, /* rightshift */
937 2, /* size (0 = byte, 1 = short, 2 = long) */
938 32, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 bfd_elf_generic_reloc, /* special_function */
943 "R_PPC_TLS", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* Computes the load module index of the load module that contains the
950 definition of its TLS sym. */
951 HOWTO (R_PPC_DTPMOD32,
952 0, /* rightshift */
953 2, /* size (0 = byte, 1 = short, 2 = long) */
954 32, /* bitsize */
955 FALSE, /* pc_relative */
956 0, /* bitpos */
957 complain_overflow_dont, /* complain_on_overflow */
958 ppc_elf_unhandled_reloc, /* special_function */
959 "R_PPC_DTPMOD32", /* name */
960 FALSE, /* partial_inplace */
961 0, /* src_mask */
962 0xffffffff, /* dst_mask */
963 FALSE), /* pcrel_offset */
964
965 /* Computes a dtv-relative displacement, the difference between the value
966 of sym+add and the base address of the thread-local storage block that
967 contains the definition of sym, minus 0x8000. */
968 HOWTO (R_PPC_DTPREL32,
969 0, /* rightshift */
970 2, /* size (0 = byte, 1 = short, 2 = long) */
971 32, /* bitsize */
972 FALSE, /* pc_relative */
973 0, /* bitpos */
974 complain_overflow_dont, /* complain_on_overflow */
975 ppc_elf_unhandled_reloc, /* special_function */
976 "R_PPC_DTPREL32", /* name */
977 FALSE, /* partial_inplace */
978 0, /* src_mask */
979 0xffffffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
981
982 /* A 16 bit dtprel reloc. */
983 HOWTO (R_PPC_DTPREL16,
984 0, /* rightshift */
985 1, /* size (0 = byte, 1 = short, 2 = long) */
986 16, /* bitsize */
987 FALSE, /* pc_relative */
988 0, /* bitpos */
989 complain_overflow_signed, /* complain_on_overflow */
990 ppc_elf_unhandled_reloc, /* special_function */
991 "R_PPC_DTPREL16", /* name */
992 FALSE, /* partial_inplace */
993 0, /* src_mask */
994 0xffff, /* dst_mask */
995 FALSE), /* pcrel_offset */
996
997 /* Like DTPREL16, but no overflow. */
998 HOWTO (R_PPC_DTPREL16_LO,
999 0, /* rightshift */
1000 1, /* size (0 = byte, 1 = short, 2 = long) */
1001 16, /* bitsize */
1002 FALSE, /* pc_relative */
1003 0, /* bitpos */
1004 complain_overflow_dont, /* complain_on_overflow */
1005 ppc_elf_unhandled_reloc, /* special_function */
1006 "R_PPC_DTPREL16_LO", /* name */
1007 FALSE, /* partial_inplace */
1008 0, /* src_mask */
1009 0xffff, /* dst_mask */
1010 FALSE), /* pcrel_offset */
1011
1012 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1013 HOWTO (R_PPC_DTPREL16_HI,
1014 16, /* rightshift */
1015 1, /* size (0 = byte, 1 = short, 2 = long) */
1016 16, /* bitsize */
1017 FALSE, /* pc_relative */
1018 0, /* bitpos */
1019 complain_overflow_dont, /* complain_on_overflow */
1020 ppc_elf_unhandled_reloc, /* special_function */
1021 "R_PPC_DTPREL16_HI", /* name */
1022 FALSE, /* partial_inplace */
1023 0, /* src_mask */
1024 0xffff, /* dst_mask */
1025 FALSE), /* pcrel_offset */
1026
1027 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1028 HOWTO (R_PPC_DTPREL16_HA,
1029 16, /* rightshift */
1030 1, /* size (0 = byte, 1 = short, 2 = long) */
1031 16, /* bitsize */
1032 FALSE, /* pc_relative */
1033 0, /* bitpos */
1034 complain_overflow_dont, /* complain_on_overflow */
1035 ppc_elf_unhandled_reloc, /* special_function */
1036 "R_PPC_DTPREL16_HA", /* name */
1037 FALSE, /* partial_inplace */
1038 0, /* src_mask */
1039 0xffff, /* dst_mask */
1040 FALSE), /* pcrel_offset */
1041
1042 /* Computes a tp-relative displacement, the difference between the value of
1043 sym+add and the value of the thread pointer (r13). */
1044 HOWTO (R_PPC_TPREL32,
1045 0, /* rightshift */
1046 2, /* size (0 = byte, 1 = short, 2 = long) */
1047 32, /* bitsize */
1048 FALSE, /* pc_relative */
1049 0, /* bitpos */
1050 complain_overflow_dont, /* complain_on_overflow */
1051 ppc_elf_unhandled_reloc, /* special_function */
1052 "R_PPC_TPREL32", /* name */
1053 FALSE, /* partial_inplace */
1054 0, /* src_mask */
1055 0xffffffff, /* dst_mask */
1056 FALSE), /* pcrel_offset */
1057
1058 /* A 16 bit tprel reloc. */
1059 HOWTO (R_PPC_TPREL16,
1060 0, /* rightshift */
1061 1, /* size (0 = byte, 1 = short, 2 = long) */
1062 16, /* bitsize */
1063 FALSE, /* pc_relative */
1064 0, /* bitpos */
1065 complain_overflow_signed, /* complain_on_overflow */
1066 ppc_elf_unhandled_reloc, /* special_function */
1067 "R_PPC_TPREL16", /* name */
1068 FALSE, /* partial_inplace */
1069 0, /* src_mask */
1070 0xffff, /* dst_mask */
1071 FALSE), /* pcrel_offset */
1072
1073 /* Like TPREL16, but no overflow. */
1074 HOWTO (R_PPC_TPREL16_LO,
1075 0, /* rightshift */
1076 1, /* size (0 = byte, 1 = short, 2 = long) */
1077 16, /* bitsize */
1078 FALSE, /* pc_relative */
1079 0, /* bitpos */
1080 complain_overflow_dont, /* complain_on_overflow */
1081 ppc_elf_unhandled_reloc, /* special_function */
1082 "R_PPC_TPREL16_LO", /* name */
1083 FALSE, /* partial_inplace */
1084 0, /* src_mask */
1085 0xffff, /* dst_mask */
1086 FALSE), /* pcrel_offset */
1087
1088 /* Like TPREL16_LO, but next higher group of 16 bits. */
1089 HOWTO (R_PPC_TPREL16_HI,
1090 16, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_dont, /* complain_on_overflow */
1096 ppc_elf_unhandled_reloc, /* special_function */
1097 "R_PPC_TPREL16_HI", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xffff, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like TPREL16_HI, but adjust for low 16 bits. */
1104 HOWTO (R_PPC_TPREL16_HA,
1105 16, /* rightshift */
1106 1, /* size (0 = byte, 1 = short, 2 = long) */
1107 16, /* bitsize */
1108 FALSE, /* pc_relative */
1109 0, /* bitpos */
1110 complain_overflow_dont, /* complain_on_overflow */
1111 ppc_elf_unhandled_reloc, /* special_function */
1112 "R_PPC_TPREL16_HA", /* name */
1113 FALSE, /* partial_inplace */
1114 0, /* src_mask */
1115 0xffff, /* dst_mask */
1116 FALSE), /* pcrel_offset */
1117
1118 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1119 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1120 to the first entry. */
1121 HOWTO (R_PPC_GOT_TLSGD16,
1122 0, /* rightshift */
1123 1, /* size (0 = byte, 1 = short, 2 = long) */
1124 16, /* bitsize */
1125 FALSE, /* pc_relative */
1126 0, /* bitpos */
1127 complain_overflow_signed, /* complain_on_overflow */
1128 ppc_elf_unhandled_reloc, /* special_function */
1129 "R_PPC_GOT_TLSGD16", /* name */
1130 FALSE, /* partial_inplace */
1131 0, /* src_mask */
1132 0xffff, /* dst_mask */
1133 FALSE), /* pcrel_offset */
1134
1135 /* Like GOT_TLSGD16, but no overflow. */
1136 HOWTO (R_PPC_GOT_TLSGD16_LO,
1137 0, /* rightshift */
1138 1, /* size (0 = byte, 1 = short, 2 = long) */
1139 16, /* bitsize */
1140 FALSE, /* pc_relative */
1141 0, /* bitpos */
1142 complain_overflow_dont, /* complain_on_overflow */
1143 ppc_elf_unhandled_reloc, /* special_function */
1144 "R_PPC_GOT_TLSGD16_LO", /* name */
1145 FALSE, /* partial_inplace */
1146 0, /* src_mask */
1147 0xffff, /* dst_mask */
1148 FALSE), /* pcrel_offset */
1149
1150 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1151 HOWTO (R_PPC_GOT_TLSGD16_HI,
1152 16, /* rightshift */
1153 1, /* size (0 = byte, 1 = short, 2 = long) */
1154 16, /* bitsize */
1155 FALSE, /* pc_relative */
1156 0, /* bitpos */
1157 complain_overflow_dont, /* complain_on_overflow */
1158 ppc_elf_unhandled_reloc, /* special_function */
1159 "R_PPC_GOT_TLSGD16_HI", /* name */
1160 FALSE, /* partial_inplace */
1161 0, /* src_mask */
1162 0xffff, /* dst_mask */
1163 FALSE), /* pcrel_offset */
1164
1165 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1166 HOWTO (R_PPC_GOT_TLSGD16_HA,
1167 16, /* rightshift */
1168 1, /* size (0 = byte, 1 = short, 2 = long) */
1169 16, /* bitsize */
1170 FALSE, /* pc_relative */
1171 0, /* bitpos */
1172 complain_overflow_dont, /* complain_on_overflow */
1173 ppc_elf_unhandled_reloc, /* special_function */
1174 "R_PPC_GOT_TLSGD16_HA", /* name */
1175 FALSE, /* partial_inplace */
1176 0, /* src_mask */
1177 0xffff, /* dst_mask */
1178 FALSE), /* pcrel_offset */
1179
1180 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1181 with values (sym+add)@dtpmod and zero, and computes the offset to the
1182 first entry. */
1183 HOWTO (R_PPC_GOT_TLSLD16,
1184 0, /* rightshift */
1185 1, /* size (0 = byte, 1 = short, 2 = long) */
1186 16, /* bitsize */
1187 FALSE, /* pc_relative */
1188 0, /* bitpos */
1189 complain_overflow_signed, /* complain_on_overflow */
1190 ppc_elf_unhandled_reloc, /* special_function */
1191 "R_PPC_GOT_TLSLD16", /* name */
1192 FALSE, /* partial_inplace */
1193 0, /* src_mask */
1194 0xffff, /* dst_mask */
1195 FALSE), /* pcrel_offset */
1196
1197 /* Like GOT_TLSLD16, but no overflow. */
1198 HOWTO (R_PPC_GOT_TLSLD16_LO,
1199 0, /* rightshift */
1200 1, /* size (0 = byte, 1 = short, 2 = long) */
1201 16, /* bitsize */
1202 FALSE, /* pc_relative */
1203 0, /* bitpos */
1204 complain_overflow_dont, /* complain_on_overflow */
1205 ppc_elf_unhandled_reloc, /* special_function */
1206 "R_PPC_GOT_TLSLD16_LO", /* name */
1207 FALSE, /* partial_inplace */
1208 0, /* src_mask */
1209 0xffff, /* dst_mask */
1210 FALSE), /* pcrel_offset */
1211
1212 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1213 HOWTO (R_PPC_GOT_TLSLD16_HI,
1214 16, /* rightshift */
1215 1, /* size (0 = byte, 1 = short, 2 = long) */
1216 16, /* bitsize */
1217 FALSE, /* pc_relative */
1218 0, /* bitpos */
1219 complain_overflow_dont, /* complain_on_overflow */
1220 ppc_elf_unhandled_reloc, /* special_function */
1221 "R_PPC_GOT_TLSLD16_HI", /* name */
1222 FALSE, /* partial_inplace */
1223 0, /* src_mask */
1224 0xffff, /* dst_mask */
1225 FALSE), /* pcrel_offset */
1226
1227 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1228 HOWTO (R_PPC_GOT_TLSLD16_HA,
1229 16, /* rightshift */
1230 1, /* size (0 = byte, 1 = short, 2 = long) */
1231 16, /* bitsize */
1232 FALSE, /* pc_relative */
1233 0, /* bitpos */
1234 complain_overflow_dont, /* complain_on_overflow */
1235 ppc_elf_unhandled_reloc, /* special_function */
1236 "R_PPC_GOT_TLSLD16_HA", /* name */
1237 FALSE, /* partial_inplace */
1238 0, /* src_mask */
1239 0xffff, /* dst_mask */
1240 FALSE), /* pcrel_offset */
1241
1242 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1243 the offset to the entry. */
1244 HOWTO (R_PPC_GOT_DTPREL16,
1245 0, /* rightshift */
1246 1, /* size (0 = byte, 1 = short, 2 = long) */
1247 16, /* bitsize */
1248 FALSE, /* pc_relative */
1249 0, /* bitpos */
1250 complain_overflow_signed, /* complain_on_overflow */
1251 ppc_elf_unhandled_reloc, /* special_function */
1252 "R_PPC_GOT_DTPREL16", /* name */
1253 FALSE, /* partial_inplace */
1254 0, /* src_mask */
1255 0xffff, /* dst_mask */
1256 FALSE), /* pcrel_offset */
1257
1258 /* Like GOT_DTPREL16, but no overflow. */
1259 HOWTO (R_PPC_GOT_DTPREL16_LO,
1260 0, /* rightshift */
1261 1, /* size (0 = byte, 1 = short, 2 = long) */
1262 16, /* bitsize */
1263 FALSE, /* pc_relative */
1264 0, /* bitpos */
1265 complain_overflow_dont, /* complain_on_overflow */
1266 ppc_elf_unhandled_reloc, /* special_function */
1267 "R_PPC_GOT_DTPREL16_LO", /* name */
1268 FALSE, /* partial_inplace */
1269 0, /* src_mask */
1270 0xffff, /* dst_mask */
1271 FALSE), /* pcrel_offset */
1272
1273 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1274 HOWTO (R_PPC_GOT_DTPREL16_HI,
1275 16, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_dont, /* complain_on_overflow */
1281 ppc_elf_unhandled_reloc, /* special_function */
1282 "R_PPC_GOT_DTPREL16_HI", /* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xffff, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1289 HOWTO (R_PPC_GOT_DTPREL16_HA,
1290 16, /* rightshift */
1291 1, /* size (0 = byte, 1 = short, 2 = long) */
1292 16, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 ppc_elf_unhandled_reloc, /* special_function */
1297 "R_PPC_GOT_DTPREL16_HA", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0xffff, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1304 offset to the entry. */
1305 HOWTO (R_PPC_GOT_TPREL16,
1306 0, /* rightshift */
1307 1, /* size (0 = byte, 1 = short, 2 = long) */
1308 16, /* bitsize */
1309 FALSE, /* pc_relative */
1310 0, /* bitpos */
1311 complain_overflow_signed, /* complain_on_overflow */
1312 ppc_elf_unhandled_reloc, /* special_function */
1313 "R_PPC_GOT_TPREL16", /* name */
1314 FALSE, /* partial_inplace */
1315 0, /* src_mask */
1316 0xffff, /* dst_mask */
1317 FALSE), /* pcrel_offset */
1318
1319 /* Like GOT_TPREL16, but no overflow. */
1320 HOWTO (R_PPC_GOT_TPREL16_LO,
1321 0, /* rightshift */
1322 1, /* size (0 = byte, 1 = short, 2 = long) */
1323 16, /* bitsize */
1324 FALSE, /* pc_relative */
1325 0, /* bitpos */
1326 complain_overflow_dont, /* complain_on_overflow */
1327 ppc_elf_unhandled_reloc, /* special_function */
1328 "R_PPC_GOT_TPREL16_LO", /* name */
1329 FALSE, /* partial_inplace */
1330 0, /* src_mask */
1331 0xffff, /* dst_mask */
1332 FALSE), /* pcrel_offset */
1333
1334 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1335 HOWTO (R_PPC_GOT_TPREL16_HI,
1336 16, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 FALSE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_dont, /* complain_on_overflow */
1342 ppc_elf_unhandled_reloc, /* special_function */
1343 "R_PPC_GOT_TPREL16_HI", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1350 HOWTO (R_PPC_GOT_TPREL16_HA,
1351 16, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 FALSE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_dont, /* complain_on_overflow */
1357 ppc_elf_unhandled_reloc, /* special_function */
1358 "R_PPC_GOT_TPREL16_HA", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 FALSE), /* pcrel_offset */
1363
1364 /* The remaining relocs are from the Embedded ELF ABI, and are not
1365 in the SVR4 ELF ABI. */
1366
1367 /* 32 bit value resulting from the addend minus the symbol. */
1368 HOWTO (R_PPC_EMB_NADDR32, /* type */
1369 0, /* rightshift */
1370 2, /* size (0 = byte, 1 = short, 2 = long) */
1371 32, /* bitsize */
1372 FALSE, /* pc_relative */
1373 0, /* bitpos */
1374 complain_overflow_bitfield, /* complain_on_overflow */
1375 bfd_elf_generic_reloc, /* special_function */
1376 "R_PPC_EMB_NADDR32", /* name */
1377 FALSE, /* partial_inplace */
1378 0, /* src_mask */
1379 0xffffffff, /* dst_mask */
1380 FALSE), /* pcrel_offset */
1381
1382 /* 16 bit value resulting from the addend minus the symbol. */
1383 HOWTO (R_PPC_EMB_NADDR16, /* type */
1384 0, /* rightshift */
1385 1, /* size (0 = byte, 1 = short, 2 = long) */
1386 16, /* bitsize */
1387 FALSE, /* pc_relative */
1388 0, /* bitpos */
1389 complain_overflow_bitfield, /* complain_on_overflow */
1390 bfd_elf_generic_reloc, /* special_function */
1391 "R_PPC_EMB_NADDR16", /* name */
1392 FALSE, /* partial_inplace */
1393 0, /* src_mask */
1394 0xffff, /* dst_mask */
1395 FALSE), /* pcrel_offset */
1396
1397 /* 16 bit value resulting from the addend minus the symbol. */
1398 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1399 0, /* 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 bfd_elf_generic_reloc, /* special_function */
1406 "R_PPC_EMB_ADDR16_LO", /* name */
1407 FALSE, /* partial_inplace */
1408 0, /* src_mask */
1409 0xffff, /* dst_mask */
1410 FALSE), /* pcrel_offset */
1411
1412 /* The high order 16 bits of the addend minus the symbol. */
1413 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1414 16, /* rightshift */
1415 1, /* size (0 = byte, 1 = short, 2 = long) */
1416 16, /* bitsize */
1417 FALSE, /* pc_relative */
1418 0, /* bitpos */
1419 complain_overflow_dont, /* complain_on_overflow */
1420 bfd_elf_generic_reloc, /* special_function */
1421 "R_PPC_EMB_NADDR16_HI", /* name */
1422 FALSE, /* partial_inplace */
1423 0, /* src_mask */
1424 0xffff, /* dst_mask */
1425 FALSE), /* pcrel_offset */
1426
1427 /* The high order 16 bits of the result of the addend minus the address,
1428 plus 1 if the contents of the low 16 bits, treated as a signed number,
1429 is negative. */
1430 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1431 16, /* rightshift */
1432 1, /* size (0 = byte, 1 = short, 2 = long) */
1433 16, /* bitsize */
1434 FALSE, /* pc_relative */
1435 0, /* bitpos */
1436 complain_overflow_dont, /* complain_on_overflow */
1437 ppc_elf_addr16_ha_reloc, /* special_function */
1438 "R_PPC_EMB_NADDR16_HA", /* name */
1439 FALSE, /* partial_inplace */
1440 0, /* src_mask */
1441 0xffff, /* dst_mask */
1442 FALSE), /* pcrel_offset */
1443
1444 /* 16 bit value resulting from allocating a 4 byte word to hold an
1445 address in the .sdata section, and returning the offset from
1446 _SDA_BASE_ for that relocation. */
1447 HOWTO (R_PPC_EMB_SDAI16, /* type */
1448 0, /* rightshift */
1449 1, /* size (0 = byte, 1 = short, 2 = long) */
1450 16, /* bitsize */
1451 FALSE, /* pc_relative */
1452 0, /* bitpos */
1453 complain_overflow_bitfield, /* complain_on_overflow */
1454 bfd_elf_generic_reloc, /* special_function */
1455 "R_PPC_EMB_SDAI16", /* name */
1456 FALSE, /* partial_inplace */
1457 0, /* src_mask */
1458 0xffff, /* dst_mask */
1459 FALSE), /* pcrel_offset */
1460
1461 /* 16 bit value resulting from allocating a 4 byte word to hold an
1462 address in the .sdata2 section, and returning the offset from
1463 _SDA2_BASE_ for that relocation. */
1464 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1465 0, /* rightshift */
1466 1, /* size (0 = byte, 1 = short, 2 = long) */
1467 16, /* bitsize */
1468 FALSE, /* pc_relative */
1469 0, /* bitpos */
1470 complain_overflow_bitfield, /* complain_on_overflow */
1471 bfd_elf_generic_reloc, /* special_function */
1472 "R_PPC_EMB_SDA2I16", /* name */
1473 FALSE, /* partial_inplace */
1474 0, /* src_mask */
1475 0xffff, /* dst_mask */
1476 FALSE), /* pcrel_offset */
1477
1478 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1479 small data items. */
1480 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1481 0, /* rightshift */
1482 1, /* size (0 = byte, 1 = short, 2 = long) */
1483 16, /* bitsize */
1484 FALSE, /* pc_relative */
1485 0, /* bitpos */
1486 complain_overflow_signed, /* complain_on_overflow */
1487 bfd_elf_generic_reloc, /* special_function */
1488 "R_PPC_EMB_SDA2REL", /* name */
1489 FALSE, /* partial_inplace */
1490 0, /* src_mask */
1491 0xffff, /* dst_mask */
1492 FALSE), /* pcrel_offset */
1493
1494 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1495 signed offset from the appropriate base, and filling in the register
1496 field with the appropriate register (0, 2, or 13). */
1497 HOWTO (R_PPC_EMB_SDA21, /* type */
1498 0, /* rightshift */
1499 2, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_signed, /* complain_on_overflow */
1504 bfd_elf_generic_reloc, /* special_function */
1505 "R_PPC_EMB_SDA21", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Relocation not handled: R_PPC_EMB_MRKREF */
1512 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1513 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1514 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1515 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1516 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1517
1518 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1519 in the 16 bit signed offset from the appropriate base, and filling in the
1520 register field with the appropriate register (0, 2, or 13). */
1521 HOWTO (R_PPC_EMB_RELSDA, /* type */
1522 0, /* rightshift */
1523 1, /* size (0 = byte, 1 = short, 2 = long) */
1524 16, /* bitsize */
1525 TRUE, /* pc_relative */
1526 0, /* bitpos */
1527 complain_overflow_signed, /* complain_on_overflow */
1528 bfd_elf_generic_reloc, /* special_function */
1529 "R_PPC_EMB_RELSDA", /* name */
1530 FALSE, /* partial_inplace */
1531 0, /* src_mask */
1532 0xffff, /* dst_mask */
1533 FALSE), /* pcrel_offset */
1534
1535 /* Phony relocs to handle branch stubs. */
1536 HOWTO (R_PPC_RELAX32, /* type */
1537 0, /* rightshift */
1538 0, /* size */
1539 0, /* bitsize */
1540 FALSE, /* pc_relative */
1541 0, /* bitpos */
1542 complain_overflow_dont, /* complain_on_overflow */
1543 bfd_elf_generic_reloc, /* special_function */
1544 "R_PPC_RELAX32", /* name */
1545 FALSE, /* partial_inplace */
1546 0, /* src_mask */
1547 0, /* dst_mask */
1548 FALSE), /* pcrel_offset */
1549
1550 HOWTO (R_PPC_RELAX32PC, /* type */
1551 0, /* rightshift */
1552 0, /* size */
1553 0, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_dont, /* complain_on_overflow */
1557 bfd_elf_generic_reloc, /* special_function */
1558 "R_PPC_RELAX32PC", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* GNU extension to record C++ vtable hierarchy. */
1565 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1566 0, /* rightshift */
1567 0, /* size (0 = byte, 1 = short, 2 = long) */
1568 0, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 NULL, /* special_function */
1573 "R_PPC_GNU_VTINHERIT", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* GNU extension to record C++ vtable member usage. */
1580 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1581 0, /* rightshift */
1582 0, /* size (0 = byte, 1 = short, 2 = long) */
1583 0, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_dont, /* complain_on_overflow */
1587 NULL, /* special_function */
1588 "R_PPC_GNU_VTENTRY", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Phony reloc to handle AIX style TOC entries. */
1595 HOWTO (R_PPC_TOC16, /* type */
1596 0, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_signed, /* complain_on_overflow */
1602 bfd_elf_generic_reloc, /* special_function */
1603 "R_PPC_TOC16", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608 };
1609 \f
1610 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1611
1612 static void
1613 ppc_elf_howto_init (void)
1614 {
1615 unsigned int i, type;
1616
1617 for (i = 0;
1618 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1619 i++)
1620 {
1621 type = ppc_elf_howto_raw[i].type;
1622 if (type >= (sizeof (ppc_elf_howto_table)
1623 / sizeof (ppc_elf_howto_table[0])))
1624 abort ();
1625 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1626 }
1627 }
1628 \f
1629 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
1630
1631 static const int shared_stub_entry[] =
1632 {
1633 0x7c0802a6, /* mflr 0 */
1634 0x429f0005, /* bcl 20, 31, .Lxxx */
1635 0x7d6802a6, /* mflr 11 */
1636 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
1637 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
1638 0x7c0803a6, /* mtlr 0 */
1639 0x7d6903a6, /* mtctr 11 */
1640 0x4e800420, /* bctr */
1641 };
1642
1643 static const int stub_entry[] =
1644 {
1645 0x3d600000, /* lis 11,xxx@ha */
1646 0x396b0000, /* addi 11,11,xxx@l */
1647 0x7d6903a6, /* mtctr 11 */
1648 0x4e800420, /* bctr */
1649 };
1650
1651
1652 static bfd_boolean
1653 ppc_elf_relax_section (bfd *abfd,
1654 asection *isec,
1655 struct bfd_link_info *link_info,
1656 bfd_boolean *again)
1657 {
1658 struct one_fixup
1659 {
1660 struct one_fixup *next;
1661 asection *tsec;
1662 bfd_vma toff;
1663 bfd_vma trampoff;
1664 };
1665
1666 Elf_Internal_Shdr *symtab_hdr;
1667 bfd_byte *contents = NULL;
1668 Elf_Internal_Sym *isymbuf = NULL;
1669 Elf_Internal_Rela *internal_relocs = NULL;
1670 Elf_Internal_Rela *irel, *irelend;
1671 struct one_fixup *fixups = NULL;
1672 bfd_boolean changed;
1673 struct ppc_elf_link_hash_table *ppc_info;
1674 bfd_size_type trampoff;
1675
1676 *again = FALSE;
1677
1678 /* Nothing to do if there are no relocations and no need for
1679 the relax finalize pass. */
1680 if ((isec->flags & SEC_RELOC) == 0
1681 || isec->reloc_count == 0
1682 || link_info->relax_finalizing)
1683 return TRUE;
1684
1685 /* If needed, initialize this section's cooked size. */
1686 if (isec->_cooked_size == 0)
1687 isec->_cooked_size = isec->_raw_size;
1688
1689 trampoff = (isec->_cooked_size + 3) & (bfd_vma) -4;
1690 /* Space for a branch around any trampolines. */
1691 trampoff += 4;
1692
1693 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1694
1695 /* Get a copy of the native relocations. */
1696 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
1697 link_info->keep_memory);
1698 if (internal_relocs == NULL)
1699 goto error_return;
1700
1701 ppc_info = ppc_elf_hash_table (link_info);
1702 irelend = internal_relocs + isec->reloc_count;
1703
1704 /* Get the section contents. */
1705 /* Get cached copy if it exists. */
1706 if (elf_section_data (isec)->this_hdr.contents != NULL)
1707 contents = elf_section_data (isec)->this_hdr.contents;
1708 else
1709 {
1710 /* Go get them off disk. */
1711 contents = bfd_malloc (isec->_raw_size);
1712 if (contents == NULL)
1713 goto error_return;
1714
1715 if (!bfd_get_section_contents (abfd, isec, contents, 0, isec->_raw_size))
1716 goto error_return;
1717 }
1718
1719 for (irel = internal_relocs; irel < irelend; irel++)
1720 {
1721 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
1722 bfd_vma symaddr, reladdr, toff, roff;
1723 asection *tsec;
1724 struct one_fixup *f;
1725 size_t insn_offset = 0;
1726 bfd_vma max_branch_offset, val;
1727 bfd_byte *hit_addr;
1728 unsigned long t0;
1729
1730 switch (r_type)
1731 {
1732 case R_PPC_REL24:
1733 case R_PPC_LOCAL24PC:
1734 case R_PPC_PLTREL24:
1735 max_branch_offset = 1 << 25;
1736 break;
1737
1738 case R_PPC_REL14:
1739 case R_PPC_REL14_BRTAKEN:
1740 case R_PPC_REL14_BRNTAKEN:
1741 max_branch_offset = 1 << 15;
1742 break;
1743
1744 default:
1745 continue;
1746 }
1747
1748 /* Get the value of the symbol referred to by the reloc. */
1749 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1750 {
1751 /* A local symbol. */
1752 Elf_Internal_Sym *isym;
1753
1754 /* Read this BFD's local symbols. */
1755 if (isymbuf == NULL)
1756 {
1757 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1758 if (isymbuf == NULL)
1759 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1760 symtab_hdr->sh_info, 0,
1761 NULL, NULL, NULL);
1762 if (isymbuf == 0)
1763 goto error_return;
1764 }
1765 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1766 if (isym->st_shndx == SHN_UNDEF)
1767 continue; /* We can't do anthing with undefined symbols. */
1768 else if (isym->st_shndx == SHN_ABS)
1769 tsec = bfd_abs_section_ptr;
1770 else if (isym->st_shndx == SHN_COMMON)
1771 tsec = bfd_com_section_ptr;
1772 else
1773 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1774
1775 toff = isym->st_value;
1776 }
1777 else
1778 {
1779 /* Global symbol handling. */
1780 unsigned long indx;
1781 struct elf_link_hash_entry *h;
1782
1783 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1784 h = elf_sym_hashes (abfd)[indx];
1785
1786 while (h->root.type == bfd_link_hash_indirect
1787 || h->root.type == bfd_link_hash_warning)
1788 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1789
1790 if (r_type == R_PPC_PLTREL24
1791 && ppc_info->plt != NULL
1792 && h->plt.offset != (bfd_vma) -1)
1793 {
1794 tsec = ppc_info->plt;
1795 toff = h->plt.offset;
1796 }
1797 else if (h->root.type == bfd_link_hash_defined
1798 || h->root.type == bfd_link_hash_defweak)
1799 {
1800 tsec = h->root.u.def.section;
1801 toff = h->root.u.def.value;
1802 }
1803 else
1804 continue;
1805 }
1806
1807 /* If the branch and target are in the same section, you have
1808 no hope of adding stubs. We'll error out later should the
1809 branch overflow. */
1810 if (tsec == isec)
1811 continue;
1812
1813 toff += irel->r_addend;
1814 if (tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
1815 toff = _bfd_merged_section_offset (abfd, &tsec,
1816 elf_section_data (tsec)->sec_info,
1817 toff, 0);
1818
1819 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
1820
1821 roff = irel->r_offset;
1822
1823 reladdr = (isec->output_section->vma
1824 + isec->output_offset
1825 + roff);
1826
1827 /* If the branch is in range, no need to do anything. */
1828 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
1829 continue;
1830
1831 /* Look for an existing fixup to this address. */
1832 for (f = fixups; f ; f = f->next)
1833 if (f->tsec == tsec && f->toff == toff)
1834 break;
1835
1836 if (f == NULL)
1837 {
1838 size_t size;
1839 unsigned long stub_rtype;
1840
1841 val = trampoff - roff;
1842 if (val >= max_branch_offset)
1843 /* Oh dear, we can't reach a trampoline. Don't try to add
1844 one. We'll report an error later. */
1845 continue;
1846
1847 if (link_info->shared)
1848 {
1849 size = 4 * ARRAY_SIZE (shared_stub_entry);
1850 insn_offset = 12;
1851 stub_rtype = R_PPC_RELAX32PC;
1852 }
1853 else
1854 {
1855 size = 4 * ARRAY_SIZE (stub_entry);
1856 insn_offset = 0;
1857 stub_rtype = R_PPC_RELAX32;
1858 }
1859
1860 /* Hijack the old relocation. Since we need two
1861 relocations for this use a "composite" reloc. */
1862 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1863 stub_rtype);
1864 irel->r_offset = trampoff + insn_offset;
1865
1866 /* Record the fixup so we don't do it again this section. */
1867 f = bfd_malloc (sizeof (*f));
1868 f->next = fixups;
1869 f->tsec = tsec;
1870 f->toff = toff;
1871 f->trampoff = trampoff;
1872 fixups = f;
1873
1874 trampoff += size;
1875 }
1876 else
1877 {
1878 val = f->trampoff - roff;
1879 if (val >= max_branch_offset)
1880 continue;
1881
1882 /* Nop out the reloc, since we're finalizing things here. */
1883 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
1884 }
1885
1886 /* Fix up the existing branch to hit the trampoline. */
1887 hit_addr = contents + roff;
1888 switch (r_type)
1889 {
1890 case R_PPC_REL24:
1891 case R_PPC_LOCAL24PC:
1892 case R_PPC_PLTREL24:
1893 t0 = bfd_get_32 (abfd, hit_addr);
1894 t0 &= ~0x3fffffc;
1895 t0 |= val & 0x3fffffc;
1896 bfd_put_32 (abfd, t0, hit_addr);
1897 break;
1898
1899 case R_PPC_REL14:
1900 case R_PPC_REL14_BRTAKEN:
1901 case R_PPC_REL14_BRNTAKEN:
1902 t0 = bfd_get_32 (abfd, hit_addr);
1903 t0 &= ~0xfffc;
1904 t0 |= val & 0xfffc;
1905 bfd_put_32 (abfd, t0, hit_addr);
1906 break;
1907 }
1908 }
1909
1910 /* Write out the trampolines. */
1911 changed = fixups != NULL;
1912 if (fixups != NULL)
1913 {
1914 const int *stub;
1915 bfd_byte *dest;
1916 bfd_vma val;
1917 int i, size;
1918
1919 do
1920 {
1921 struct one_fixup *f = fixups;
1922 fixups = fixups->next;
1923 free (f);
1924 }
1925 while (fixups);
1926
1927 contents = bfd_realloc (contents, trampoff);
1928 if (contents == NULL)
1929 goto error_return;
1930
1931 isec->_cooked_size = (isec->_cooked_size + 3) & (bfd_vma) -4;
1932 /* Branch around the trampolines. */
1933 val = trampoff - isec->_cooked_size + 0x48000000;
1934 dest = contents + isec->_cooked_size;
1935 isec->_cooked_size = trampoff;
1936 bfd_put_32 (abfd, val, dest);
1937 dest += 4;
1938
1939 if (link_info->shared)
1940 {
1941 stub = shared_stub_entry;
1942 size = ARRAY_SIZE (shared_stub_entry);
1943 }
1944 else
1945 {
1946 stub = stub_entry;
1947 size = ARRAY_SIZE (stub_entry);
1948 }
1949
1950 i = 0;
1951 while (dest < contents + trampoff)
1952 {
1953 bfd_put_32 (abfd, stub[i], dest);
1954 i++;
1955 if (i == size)
1956 i = 0;
1957 dest += 4;
1958 }
1959 BFD_ASSERT (i == 0);
1960 }
1961
1962 if (isymbuf != NULL
1963 && symtab_hdr->contents != (unsigned char *) isymbuf)
1964 {
1965 if (! link_info->keep_memory)
1966 free (isymbuf);
1967 else
1968 {
1969 /* Cache the symbols for elf_link_input_bfd. */
1970 symtab_hdr->contents = (unsigned char *) isymbuf;
1971 }
1972 }
1973
1974 if (contents != NULL
1975 && elf_section_data (isec)->this_hdr.contents != contents)
1976 {
1977 if (!changed && !link_info->keep_memory)
1978 free (contents);
1979 else
1980 {
1981 /* Cache the section contents for elf_link_input_bfd. */
1982 elf_section_data (isec)->this_hdr.contents = contents;
1983 }
1984 }
1985
1986 if (elf_section_data (isec)->relocs != internal_relocs)
1987 {
1988 if (!changed)
1989 free (internal_relocs);
1990 else
1991 elf_section_data (isec)->relocs = internal_relocs;
1992 }
1993
1994 *again = changed;
1995 return TRUE;
1996
1997 error_return:
1998 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
1999 free (isymbuf);
2000 if (contents != NULL
2001 && elf_section_data (isec)->this_hdr.contents != contents)
2002 free (contents);
2003 if (internal_relocs != NULL
2004 && elf_section_data (isec)->relocs != internal_relocs)
2005 free (internal_relocs);
2006 return FALSE;
2007 }
2008 \f
2009 static reloc_howto_type *
2010 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2011 bfd_reloc_code_real_type code)
2012 {
2013 enum elf_ppc_reloc_type r;
2014
2015 /* Initialize howto table if not already done. */
2016 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2017 ppc_elf_howto_init ();
2018
2019 switch (code)
2020 {
2021 default:
2022 return NULL;
2023
2024 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
2025 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
2026 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
2027 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
2028 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
2029 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
2030 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
2031 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
2032 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
2033 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
2034 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
2035 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
2036 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
2037 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
2038 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
2039 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
2040 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
2041 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
2042 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
2043 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
2044 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
2045 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
2046 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
2047 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
2048 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
2049 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
2050 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
2051 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
2052 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
2053 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
2054 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
2055 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
2056 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
2057 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
2058 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
2059 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
2060 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
2061 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
2062 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
2063 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
2064 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
2065 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
2066 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
2067 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
2068 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
2069 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
2070 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
2071 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
2072 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
2073 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
2074 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
2075 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
2076 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
2077 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
2078 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
2079 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
2080 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
2081 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
2082 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
2083 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
2084 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
2085 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
2086 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
2087 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
2088 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
2089 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
2090 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
2091 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
2092 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
2093 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
2094 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
2095 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
2096 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
2097 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
2098 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
2099 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
2100 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
2101 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
2102 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
2103 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2104 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2105 }
2106
2107 return ppc_elf_howto_table[r];
2108 };
2109
2110 /* Set the howto pointer for a PowerPC ELF reloc. */
2111
2112 static void
2113 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2114 arelent *cache_ptr,
2115 Elf_Internal_Rela *dst)
2116 {
2117 /* Initialize howto table if not already done. */
2118 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2119 ppc_elf_howto_init ();
2120
2121 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2122 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2123 }
2124
2125 /* Handle the R_PPC_ADDR16_HA reloc. */
2126
2127 static bfd_reloc_status_type
2128 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2129 arelent *reloc_entry,
2130 asymbol *symbol,
2131 void *data ATTRIBUTE_UNUSED,
2132 asection *input_section,
2133 bfd *output_bfd,
2134 char **error_message ATTRIBUTE_UNUSED)
2135 {
2136 bfd_vma relocation;
2137
2138 if (output_bfd != NULL)
2139 {
2140 reloc_entry->address += input_section->output_offset;
2141 return bfd_reloc_ok;
2142 }
2143
2144 if (reloc_entry->address > input_section->_cooked_size)
2145 return bfd_reloc_outofrange;
2146
2147 if (bfd_is_com_section (symbol->section))
2148 relocation = 0;
2149 else
2150 relocation = symbol->value;
2151
2152 relocation += symbol->section->output_section->vma;
2153 relocation += symbol->section->output_offset;
2154 relocation += reloc_entry->addend;
2155
2156 reloc_entry->addend += (relocation & 0x8000) << 1;
2157
2158 return bfd_reloc_continue;
2159 }
2160
2161 static bfd_reloc_status_type
2162 ppc_elf_unhandled_reloc (bfd *abfd,
2163 arelent *reloc_entry,
2164 asymbol *symbol,
2165 void *data,
2166 asection *input_section,
2167 bfd *output_bfd,
2168 char **error_message)
2169 {
2170 /* If this is a relocatable link (output_bfd test tells us), just
2171 call the generic function. Any adjustment will be done at final
2172 link time. */
2173 if (output_bfd != NULL)
2174 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2175 input_section, output_bfd, error_message);
2176
2177 if (error_message != NULL)
2178 {
2179 static char buf[60];
2180 sprintf (buf, _("generic linker can't handle %s"),
2181 reloc_entry->howto->name);
2182 *error_message = buf;
2183 }
2184 return bfd_reloc_dangerous;
2185 }
2186
2187 /* Fix bad default arch selected for a 32 bit input bfd when the
2188 default is 64 bit. */
2189
2190 static bfd_boolean
2191 ppc_elf_object_p (bfd *abfd)
2192 {
2193 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2194 {
2195 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2196
2197 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2198 {
2199 /* Relies on arch after 64 bit default being 32 bit default. */
2200 abfd->arch_info = abfd->arch_info->next;
2201 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2202 }
2203 }
2204 return TRUE;
2205 }
2206
2207 /* Function to set whether a module needs the -mrelocatable bit set. */
2208
2209 static bfd_boolean
2210 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2211 {
2212 BFD_ASSERT (!elf_flags_init (abfd)
2213 || elf_elfheader (abfd)->e_flags == flags);
2214
2215 elf_elfheader (abfd)->e_flags = flags;
2216 elf_flags_init (abfd) = TRUE;
2217 return TRUE;
2218 }
2219
2220 /* Merge backend specific data from an object file to the output
2221 object file when linking. */
2222
2223 static bfd_boolean
2224 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2225 {
2226 flagword old_flags;
2227 flagword new_flags;
2228 bfd_boolean error;
2229
2230 /* Check if we have the same endianess. */
2231 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
2232 return FALSE;
2233
2234 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2235 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2236 return TRUE;
2237
2238 new_flags = elf_elfheader (ibfd)->e_flags;
2239 old_flags = elf_elfheader (obfd)->e_flags;
2240 if (!elf_flags_init (obfd))
2241 {
2242 /* First call, no flags set. */
2243 elf_flags_init (obfd) = TRUE;
2244 elf_elfheader (obfd)->e_flags = new_flags;
2245 }
2246
2247 /* Compatible flags are ok. */
2248 else if (new_flags == old_flags)
2249 ;
2250
2251 /* Incompatible flags. */
2252 else
2253 {
2254 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
2255 to be linked with either. */
2256 error = FALSE;
2257 if ((new_flags & EF_PPC_RELOCATABLE) != 0
2258 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
2259 {
2260 error = TRUE;
2261 (*_bfd_error_handler)
2262 (_("%s: compiled with -mrelocatable and linked with "
2263 "modules compiled normally"),
2264 bfd_archive_filename (ibfd));
2265 }
2266 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
2267 && (old_flags & EF_PPC_RELOCATABLE) != 0)
2268 {
2269 error = TRUE;
2270 (*_bfd_error_handler)
2271 (_("%s: compiled normally and linked with "
2272 "modules compiled with -mrelocatable"),
2273 bfd_archive_filename (ibfd));
2274 }
2275
2276 /* The output is -mrelocatable-lib iff both the input files are. */
2277 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
2278 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
2279
2280 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
2281 but each input file is either -mrelocatable or -mrelocatable-lib. */
2282 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
2283 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
2284 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
2285 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
2286
2287 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
2288 any module uses it. */
2289 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
2290
2291 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2292 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2293
2294 /* Warn about any other mismatches. */
2295 if (new_flags != old_flags)
2296 {
2297 error = TRUE;
2298 (*_bfd_error_handler)
2299 (_("%s: uses different e_flags (0x%lx) fields "
2300 "than previous modules (0x%lx)"),
2301 bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
2302 }
2303
2304 if (error)
2305 {
2306 bfd_set_error (bfd_error_bad_value);
2307 return FALSE;
2308 }
2309 }
2310
2311 return TRUE;
2312 }
2313 \f
2314 /* Handle a PowerPC specific section when reading an object file. This
2315 is called when elfcode.h finds a section with an unknown type. */
2316
2317 static bfd_boolean
2318 ppc_elf_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, const char *name)
2319 {
2320 asection *newsect;
2321 flagword flags;
2322
2323 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2324 return FALSE;
2325
2326 newsect = hdr->bfd_section;
2327 flags = bfd_get_section_flags (abfd, newsect);
2328 if (hdr->sh_flags & SHF_EXCLUDE)
2329 flags |= SEC_EXCLUDE;
2330
2331 if (hdr->sh_type == SHT_ORDERED)
2332 flags |= SEC_SORT_ENTRIES;
2333
2334 bfd_set_section_flags (abfd, newsect, flags);
2335 return TRUE;
2336 }
2337 \f
2338 /* Set up any other section flags and such that may be necessary. */
2339
2340 static bfd_boolean
2341 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2342 Elf_Internal_Shdr *shdr,
2343 asection *asect)
2344 {
2345 if ((asect->flags & SEC_EXCLUDE) != 0)
2346 shdr->sh_flags |= SHF_EXCLUDE;
2347
2348 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2349 shdr->sh_type = SHT_ORDERED;
2350
2351 return TRUE;
2352 }
2353 \f
2354 /* Find a linker generated pointer with a given addend and type. */
2355
2356 static elf_linker_section_pointers_t *
2357 elf_find_pointer_linker_section
2358 (elf_linker_section_pointers_t *linker_pointers,
2359 bfd_vma addend,
2360 elf_linker_section_t *lsect)
2361 {
2362 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2363 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2364 return linker_pointers;
2365
2366 return NULL;
2367 }
2368 \f
2369 /* Allocate a pointer to live in a linker created section. */
2370
2371 static bfd_boolean
2372 elf_create_pointer_linker_section (bfd *abfd,
2373 struct bfd_link_info *info,
2374 elf_linker_section_t *lsect,
2375 struct elf_link_hash_entry *h,
2376 const Elf_Internal_Rela *rel)
2377 {
2378 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2379 elf_linker_section_pointers_t *linker_section_ptr;
2380 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2381 bfd_size_type amt;
2382
2383 BFD_ASSERT (lsect != NULL);
2384
2385 /* Is this a global symbol? */
2386 if (h != NULL)
2387 {
2388 struct ppc_elf_link_hash_entry *eh;
2389
2390 /* Has this symbol already been allocated? If so, our work is done. */
2391 eh = (struct ppc_elf_link_hash_entry *) h;
2392 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2393 rel->r_addend,
2394 lsect))
2395 return TRUE;
2396
2397 ptr_linker_section_ptr = &eh->linker_section_pointer;
2398 /* Make sure this symbol is output as a dynamic symbol. */
2399 if (h->dynindx == -1)
2400 {
2401 if (! _bfd_elf_link_record_dynamic_symbol (info, h))
2402 return FALSE;
2403 }
2404
2405 if (lsect->rel_section)
2406 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
2407 }
2408 else
2409 {
2410 /* Allocation of a pointer to a local symbol. */
2411 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2412
2413 /* Allocate a table to hold the local symbols if first time. */
2414 if (!ptr)
2415 {
2416 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2417
2418 amt = num_symbols;
2419 amt *= sizeof (elf_linker_section_pointers_t *);
2420 ptr = bfd_zalloc (abfd, amt);
2421
2422 if (!ptr)
2423 return FALSE;
2424
2425 elf_local_ptr_offsets (abfd) = ptr;
2426 }
2427
2428 /* Has this symbol already been allocated? If so, our work is done. */
2429 if (elf_find_pointer_linker_section (ptr[r_symndx],
2430 rel->r_addend,
2431 lsect))
2432 return TRUE;
2433
2434 ptr_linker_section_ptr = &ptr[r_symndx];
2435
2436 if (info->shared)
2437 {
2438 /* If we are generating a shared object, we need to
2439 output a R_<xxx>_RELATIVE reloc so that the
2440 dynamic linker can adjust this GOT entry. */
2441 BFD_ASSERT (lsect->rel_section != NULL);
2442 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
2443 }
2444 }
2445
2446 /* Allocate space for a pointer in the linker section, and allocate
2447 a new pointer record from internal memory. */
2448 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2449 amt = sizeof (elf_linker_section_pointers_t);
2450 linker_section_ptr = bfd_alloc (abfd, amt);
2451
2452 if (!linker_section_ptr)
2453 return FALSE;
2454
2455 linker_section_ptr->next = *ptr_linker_section_ptr;
2456 linker_section_ptr->addend = rel->r_addend;
2457 linker_section_ptr->lsect = lsect;
2458 linker_section_ptr->written_address_p = FALSE;
2459 *ptr_linker_section_ptr = linker_section_ptr;
2460
2461 linker_section_ptr->offset = lsect->section->_raw_size;
2462 lsect->section->_raw_size += 4;
2463
2464 #ifdef DEBUG
2465 fprintf (stderr,
2466 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2467 lsect->name, (long) linker_section_ptr->offset,
2468 (long) lsect->section->_raw_size);
2469 #endif
2470
2471 return TRUE;
2472 }
2473 \f
2474 #define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR)
2475
2476 /* Fill in the address for a pointer generated in a linker section. */
2477
2478 static bfd_vma
2479 elf_finish_pointer_linker_section (bfd *output_bfd,
2480 bfd *input_bfd,
2481 struct bfd_link_info *info,
2482 elf_linker_section_t *lsect,
2483 struct elf_link_hash_entry *h,
2484 bfd_vma relocation,
2485 const Elf_Internal_Rela *rel,
2486 int relative_reloc)
2487 {
2488 elf_linker_section_pointers_t *linker_section_ptr;
2489
2490 BFD_ASSERT (lsect != NULL);
2491
2492 if (h != NULL)
2493 {
2494 /* Handle global symbol. */
2495 struct ppc_elf_link_hash_entry *eh;
2496
2497 eh = (struct ppc_elf_link_hash_entry *) h;
2498 linker_section_ptr
2499 = elf_find_pointer_linker_section (eh->linker_section_pointer,
2500 rel->r_addend,
2501 lsect);
2502
2503 BFD_ASSERT (linker_section_ptr != NULL);
2504
2505 if (! elf_hash_table (info)->dynamic_sections_created
2506 || (info->shared
2507 && info->symbolic
2508 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
2509 {
2510 /* This is actually a static link, or it is a
2511 -Bsymbolic link and the symbol is defined
2512 locally. We must initialize this entry in the
2513 global section.
2514
2515 When doing a dynamic link, we create a .rela.<xxx>
2516 relocation entry to initialize the value. This
2517 is done in the finish_dynamic_symbol routine. */
2518 if (!linker_section_ptr->written_address_p)
2519 {
2520 linker_section_ptr->written_address_p = TRUE;
2521 bfd_put_ptr (output_bfd,
2522 relocation + linker_section_ptr->addend,
2523 (lsect->section->contents
2524 + linker_section_ptr->offset));
2525 }
2526 }
2527 }
2528 else
2529 {
2530 /* Handle local symbol. */
2531 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2532 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
2533 BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
2534 linker_section_ptr = (elf_find_pointer_linker_section
2535 (elf_local_ptr_offsets (input_bfd)[r_symndx],
2536 rel->r_addend,
2537 lsect));
2538
2539 BFD_ASSERT (linker_section_ptr != NULL);
2540
2541 /* Write out pointer if it hasn't been rewritten out before. */
2542 if (!linker_section_ptr->written_address_p)
2543 {
2544 linker_section_ptr->written_address_p = TRUE;
2545 bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
2546 lsect->section->contents + linker_section_ptr->offset);
2547
2548 if (info->shared)
2549 {
2550 /* We need to generate a relative reloc for the dynamic
2551 linker. */
2552
2553 asection *srel = lsect->rel_section;
2554 Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL];
2555 bfd_byte *erel;
2556 const struct elf_backend_data *bed;
2557 unsigned int i;
2558
2559 BFD_ASSERT (srel != NULL);
2560
2561 bed = get_elf_backend_data (output_bfd);
2562 for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
2563 {
2564 outrel[i].r_offset = (lsect->section->output_section->vma
2565 + lsect->section->output_offset
2566 + linker_section_ptr->offset);
2567 outrel[i].r_info = 0;
2568 outrel[i].r_addend = 0;
2569 }
2570 outrel[0].r_info = ELF32_R_INFO (0, relative_reloc);
2571 erel = lsect->section->contents;
2572 erel += (elf_section_data (lsect->section)->rel_count++
2573 * sizeof (Elf32_External_Rela));
2574 bfd_elf32_swap_reloca_out (output_bfd, outrel, erel);
2575 }
2576 }
2577 }
2578
2579 relocation = (lsect->section->output_offset
2580 + linker_section_ptr->offset
2581 - lsect->sym_offset);
2582
2583 #ifdef DEBUG
2584 fprintf (stderr,
2585 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
2586 lsect->name, (long) relocation, (long) relocation);
2587 #endif
2588
2589 /* Subtract out the addend, because it will get added back in by the normal
2590 processing. */
2591 return relocation - linker_section_ptr->addend;
2592 }
2593 \f
2594 /* Create a special linker section */
2595 static elf_linker_section_t *
2596 ppc_elf_create_linker_section (bfd *abfd,
2597 struct bfd_link_info *info,
2598 enum elf_linker_section_enum which)
2599 {
2600 elf_linker_section_t *lsect;
2601 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2602 asection *s;
2603 bfd_size_type amt;
2604 flagword flags;
2605 const char *name;
2606 const char *rel_name;
2607 const char *sym_name;
2608 bfd_vma sym_offset;
2609
2610 /* Both of these sections are (technically) created by the user
2611 putting data in them, so they shouldn't be marked
2612 SEC_LINKER_CREATED.
2613
2614 The linker creates them so it has somewhere to attach their
2615 respective symbols. In fact, if they were empty it would
2616 be OK to leave the symbol set to 0 (or any random number), because
2617 the appropriate register should never be used. */
2618 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
2619 sym_offset = 32768;
2620
2621 switch (which)
2622 {
2623 default:
2624 abort ();
2625 return NULL;
2626
2627 case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
2628 name = ".sdata";
2629 rel_name = ".rela.sdata";
2630 sym_name = "_SDA_BASE_";
2631 break;
2632
2633 case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
2634 name = ".sdata2";
2635 rel_name = ".rela.sdata2";
2636 sym_name = "_SDA2_BASE_";
2637 flags |= SEC_READONLY;
2638 break;
2639 }
2640
2641 /* Record the first bfd that needs the special sections. */
2642 if (!htab->elf.dynobj)
2643 htab->elf.dynobj = abfd;
2644
2645 amt = sizeof (elf_linker_section_t);
2646 lsect = bfd_zalloc (htab->elf.dynobj, amt);
2647
2648 lsect->sym_offset = sym_offset;
2649
2650 /* See if the sections already exist. */
2651 s = bfd_get_section_by_name (htab->elf.dynobj, name);
2652 if (s == NULL || (s->flags & flags) != flags)
2653 {
2654 s = bfd_make_section_anyway (htab->elf.dynobj, name);
2655 if (s == NULL
2656 || !bfd_set_section_flags (htab->elf.dynobj, s, flags))
2657 return NULL;
2658 }
2659 lsect->section = s;
2660
2661 if (bfd_get_section_alignment (htab->elf.dynobj, s) < 2
2662 && !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2663 return NULL;
2664
2665 s->_raw_size = align_power (s->_raw_size, 2);
2666
2667 #ifdef DEBUG
2668 fprintf (stderr, "Creating section %s, current size = %ld\n",
2669 name, (long) s->_raw_size);
2670 #endif
2671
2672 if (sym_name)
2673 {
2674 struct elf_link_hash_entry *h;
2675 struct bfd_link_hash_entry *bh;
2676
2677 #ifdef DEBUG
2678 fprintf (stderr, "Adding %s to section %s\n", sym_name, name);
2679 #endif
2680 bh = bfd_link_hash_lookup (info->hash, sym_name,
2681 FALSE, FALSE, FALSE);
2682
2683 if ((bh == NULL || bh->type == bfd_link_hash_undefined)
2684 && !(_bfd_generic_link_add_one_symbol
2685 (info, abfd, sym_name, BSF_GLOBAL, s, sym_offset, NULL,
2686 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
2687 return NULL;
2688 h = (struct elf_link_hash_entry *) bh;
2689
2690 h->type = STT_OBJECT;
2691 lsect->sym_hash = h;
2692
2693 if (info->shared
2694 && ! _bfd_elf_link_record_dynamic_symbol (info, h))
2695 return NULL;
2696 }
2697
2698 if (info->shared)
2699 {
2700 s = bfd_make_section_anyway (htab->elf.dynobj, rel_name);
2701 lsect->rel_section = s;
2702 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2703 | SEC_LINKER_CREATED | SEC_READONLY);
2704 if (s == NULL
2705 || ! bfd_set_section_flags (htab->elf.dynobj, s, flags)
2706 || ! bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2707 return NULL;
2708 }
2709
2710 return lsect;
2711 }
2712 \f
2713 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
2714 need to bump up the number of section headers. */
2715
2716 static int
2717 ppc_elf_additional_program_headers (bfd *abfd)
2718 {
2719 asection *s;
2720 int ret;
2721
2722 ret = 0;
2723
2724 s = bfd_get_section_by_name (abfd, ".interp");
2725 if (s != NULL)
2726 ++ret;
2727
2728 s = bfd_get_section_by_name (abfd, ".sbss2");
2729 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2730 ++ret;
2731
2732 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2733 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2734 ++ret;
2735
2736 return ret;
2737 }
2738
2739 /* Modify the segment map if needed. */
2740
2741 static bfd_boolean
2742 ppc_elf_modify_segment_map (bfd *abfd ATTRIBUTE_UNUSED,
2743 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2744 {
2745 return TRUE;
2746 }
2747 \f
2748 /* The powerpc .got has a blrl instruction in it. Mark it executable. */
2749
2750 static bfd_boolean
2751 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2752 {
2753 struct ppc_elf_link_hash_table *htab;
2754 asection *s;
2755 flagword flags;
2756
2757 if (!_bfd_elf_create_got_section (abfd, info))
2758 return FALSE;
2759
2760 htab = ppc_elf_hash_table (info);
2761 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2762 if (s == NULL)
2763 abort ();
2764
2765 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2766 | SEC_LINKER_CREATED);
2767 if (!bfd_set_section_flags (abfd, s, flags))
2768 return FALSE;
2769
2770 htab->relgot = bfd_make_section (abfd, ".rela.got");
2771 if (!htab->relgot
2772 || ! bfd_set_section_flags (abfd, htab->relgot,
2773 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2774 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2775 | SEC_READONLY))
2776 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2777 return FALSE;
2778
2779 return TRUE;
2780 }
2781
2782 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2783 to output sections (just like _bfd_elf_create_dynamic_sections has
2784 to create .dynbss and .rela.bss). */
2785
2786 static bfd_boolean
2787 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2788 {
2789 struct ppc_elf_link_hash_table *htab;
2790 asection *s;
2791 flagword flags;
2792
2793 htab = ppc_elf_hash_table (info);
2794
2795 if (htab->got == NULL
2796 && !ppc_elf_create_got (abfd, info))
2797 return FALSE;
2798
2799 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2800 return FALSE;
2801
2802 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2803 | SEC_LINKER_CREATED);
2804
2805 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2806 htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
2807 if (s == NULL
2808 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
2809 return FALSE;
2810
2811 if (! info->shared)
2812 {
2813 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2814 htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss");
2815 if (s == NULL
2816 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
2817 || ! bfd_set_section_alignment (abfd, s, 2))
2818 return FALSE;
2819 }
2820
2821 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2822 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2823 if (s == NULL)
2824 abort ();
2825
2826 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
2827 return bfd_set_section_flags (abfd, s, flags);
2828 }
2829
2830 /* Adjust a symbol defined by a dynamic object and referenced by a
2831 regular object. The current definition is in some section of the
2832 dynamic object, but we're not including those sections. We have to
2833 change the definition to something the rest of the link can
2834 understand. */
2835
2836 static bfd_boolean
2837 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2838 struct elf_link_hash_entry *h)
2839 {
2840 struct ppc_elf_link_hash_table *htab;
2841 asection *s;
2842 unsigned int power_of_two;
2843
2844 #ifdef DEBUG
2845 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
2846 h->root.root.string);
2847 #endif
2848
2849 /* Make sure we know what is going on here. */
2850 htab = ppc_elf_hash_table (info);
2851 BFD_ASSERT (htab->elf.dynobj != NULL
2852 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2853 || h->weakdef != NULL
2854 || ((h->elf_link_hash_flags
2855 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2856 && (h->elf_link_hash_flags
2857 & ELF_LINK_HASH_REF_REGULAR) != 0
2858 && (h->elf_link_hash_flags
2859 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2860
2861 /* Deal with function syms. */
2862 if (h->type == STT_FUNC
2863 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2864 {
2865 /* Clear procedure linkage table information for any symbol that
2866 won't need a .plt entry. */
2867 if (h->plt.refcount <= 0
2868 || SYMBOL_CALLS_LOCAL (info, h)
2869 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2870 && h->root.type == bfd_link_hash_undefweak))
2871 {
2872 /* A PLT entry is not required/allowed when:
2873
2874 1. We are not using ld.so; because then the PLT entry
2875 can't be set up, so we can't use one. In this case,
2876 ppc_elf_adjust_dynamic_symbol won't even be called.
2877
2878 2. GC has rendered the entry unused.
2879
2880 3. We know for certain that a call to this symbol
2881 will go to this object, or will remain undefined. */
2882 h->plt.offset = (bfd_vma) -1;
2883 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2884 }
2885 return TRUE;
2886 }
2887 else
2888 h->plt.offset = (bfd_vma) -1;
2889
2890 /* If this is a weak symbol, and there is a real definition, the
2891 processor independent code will have arranged for us to see the
2892 real definition first, and we can just use the same value. */
2893 if (h->weakdef != NULL)
2894 {
2895 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2896 || h->weakdef->root.type == bfd_link_hash_defweak);
2897 h->root.u.def.section = h->weakdef->root.u.def.section;
2898 h->root.u.def.value = h->weakdef->root.u.def.value;
2899 if (ELIMINATE_COPY_RELOCS)
2900 h->elf_link_hash_flags
2901 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
2902 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
2903 return TRUE;
2904 }
2905
2906 /* This is a reference to a symbol defined by a dynamic object which
2907 is not a function. */
2908
2909 /* If we are creating a shared library, we must presume that the
2910 only references to the symbol are via the global offset table.
2911 For such cases we need not do anything here; the relocations will
2912 be handled correctly by relocate_section. */
2913 if (info->shared)
2914 return TRUE;
2915
2916 /* If there are no references to this symbol that do not use the
2917 GOT, we don't need to generate a copy reloc. */
2918 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
2919 return TRUE;
2920
2921 if (ELIMINATE_COPY_RELOCS)
2922 {
2923 struct ppc_elf_dyn_relocs *p;
2924 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
2925 {
2926 s = p->sec->output_section;
2927 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2928 break;
2929 }
2930
2931 /* If we didn't find any dynamic relocs in read-only sections, then
2932 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2933 if (p == NULL)
2934 {
2935 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
2936 return TRUE;
2937 }
2938 }
2939
2940 /* We must allocate the symbol in our .dynbss section, which will
2941 become part of the .bss section of the executable. There will be
2942 an entry for this symbol in the .dynsym section. The dynamic
2943 object will contain position independent code, so all references
2944 from the dynamic object to this symbol will go through the global
2945 offset table. The dynamic linker will use the .dynsym entry to
2946 determine the address it must put in the global offset table, so
2947 both the dynamic object and the regular object will refer to the
2948 same memory location for the variable.
2949
2950 Of course, if the symbol is sufficiently small, we must instead
2951 allocate it in .sbss. FIXME: It would be better to do this if and
2952 only if there were actually SDAREL relocs for that symbol. */
2953
2954 if (h->size <= elf_gp_size (htab->elf.dynobj))
2955 s = htab->dynsbss;
2956 else
2957 s = htab->dynbss;
2958 BFD_ASSERT (s != NULL);
2959
2960 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
2961 copy the initial value out of the dynamic object and into the
2962 runtime process image. We need to remember the offset into the
2963 .rela.bss section we are going to use. */
2964 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2965 {
2966 asection *srel;
2967
2968 if (h->size <= elf_gp_size (htab->elf.dynobj))
2969 srel = htab->relsbss;
2970 else
2971 srel = htab->relbss;
2972 BFD_ASSERT (srel != NULL);
2973 srel->_raw_size += sizeof (Elf32_External_Rela);
2974 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2975 }
2976
2977 /* We need to figure out the alignment required for this symbol. I
2978 have no idea how ELF linkers handle this. */
2979 power_of_two = bfd_log2 (h->size);
2980 if (power_of_two > 4)
2981 power_of_two = 4;
2982
2983 /* Apply the required alignment. */
2984 s->_raw_size = BFD_ALIGN (s->_raw_size,
2985 (bfd_size_type) (1 << power_of_two));
2986 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
2987 {
2988 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
2989 return FALSE;
2990 }
2991
2992 /* Define the symbol as being at this point in the section. */
2993 h->root.u.def.section = s;
2994 h->root.u.def.value = s->_raw_size;
2995
2996 /* Increment the section size to make room for the symbol. */
2997 s->_raw_size += h->size;
2998
2999 return TRUE;
3000 }
3001 \f
3002 /* This is the condition under which finish_dynamic_symbol will be
3003 called from elflink.h. If elflink.h doesn't call our
3004 finish_dynamic_symbol routine, we'll need to do something about
3005 initializing any .plt and .got entries in relocate_section. */
3006 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
3007 ((DYN) \
3008 && ((SHARED) \
3009 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
3010 && ((H)->dynindx != -1 \
3011 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
3012
3013 /* Of those relocs that might be copied as dynamic relocs, this macro
3014 selects those that must be copied when linking a shared library,
3015 even when the symbol is local. */
3016
3017 #define MUST_BE_DYN_RELOC(RTYPE) \
3018 ((RTYPE) != R_PPC_REL24 \
3019 && (RTYPE) != R_PPC_REL14 \
3020 && (RTYPE) != R_PPC_REL14_BRTAKEN \
3021 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
3022 && (RTYPE) != R_PPC_REL32)
3023
3024 /* Allocate space in associated reloc sections for dynamic relocs. */
3025
3026 static bfd_boolean
3027 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3028 {
3029 struct bfd_link_info *info = inf;
3030 struct ppc_elf_link_hash_entry *eh;
3031 struct ppc_elf_link_hash_table *htab;
3032 struct ppc_elf_dyn_relocs *p;
3033
3034 if (h->root.type == bfd_link_hash_indirect)
3035 return TRUE;
3036
3037 if (h->root.type == bfd_link_hash_warning)
3038 /* When warning symbols are created, they **replace** the "real"
3039 entry in the hash table, thus we never get to see the real
3040 symbol in a hash traversal. So look at it now. */
3041 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3042
3043 htab = ppc_elf_hash_table (info);
3044 if (htab->elf.dynamic_sections_created
3045 && h->plt.refcount > 0)
3046 {
3047 /* Make sure this symbol is output as a dynamic symbol. */
3048 if (h->dynindx == -1
3049 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3050 {
3051 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
3052 return FALSE;
3053 }
3054
3055 if (info->shared
3056 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3057 {
3058 asection *s = htab->plt;
3059
3060 /* If this is the first .plt entry, make room for the special
3061 first entry. */
3062 if (s->_raw_size == 0)
3063 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
3064
3065 /* The PowerPC PLT is actually composed of two parts, the
3066 first part is 2 words (for a load and a jump), and then
3067 there is a remaining word available at the end. */
3068 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
3069 + (PLT_SLOT_SIZE
3070 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE)
3071 / PLT_ENTRY_SIZE)));
3072
3073 /* If this symbol is not defined in a regular file, and we
3074 are not generating a shared library, then set the symbol
3075 to this location in the .plt. This is required to make
3076 function pointers compare as equal between the normal
3077 executable and the shared library. */
3078 if (! info->shared
3079 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3080 {
3081 h->root.u.def.section = s;
3082 h->root.u.def.value = h->plt.offset;
3083 }
3084
3085 /* Make room for this entry. After the 8192nd entry, room
3086 for two entries is allocated. */
3087 s->_raw_size += PLT_ENTRY_SIZE;
3088 if ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
3089 > PLT_NUM_SINGLE_ENTRIES)
3090 s->_raw_size += PLT_ENTRY_SIZE;
3091
3092 /* We also need to make an entry in the .rela.plt section. */
3093 htab->relplt->_raw_size += sizeof (Elf32_External_Rela);
3094 }
3095 else
3096 {
3097 h->plt.offset = (bfd_vma) -1;
3098 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3099 }
3100 }
3101 else
3102 {
3103 h->plt.offset = (bfd_vma) -1;
3104 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3105 }
3106
3107 eh = (struct ppc_elf_link_hash_entry *) h;
3108 if (eh->elf.got.refcount > 0)
3109 {
3110 /* Make sure this symbol is output as a dynamic symbol. */
3111 if (eh->elf.dynindx == -1
3112 && (eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3113 {
3114 if (!bfd_elf32_link_record_dynamic_symbol (info, &eh->elf))
3115 return FALSE;
3116 }
3117
3118 if (eh->tls_mask == (TLS_TLS | TLS_LD)
3119 && !(eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
3120 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
3121 eh->elf.got.offset = (bfd_vma) -1;
3122 else
3123 {
3124 bfd_boolean dyn;
3125 eh->elf.got.offset = htab->got->_raw_size;
3126 if ((eh->tls_mask & TLS_TLS) != 0)
3127 {
3128 if ((eh->tls_mask & TLS_LD) != 0)
3129 htab->got->_raw_size += 8;
3130 if ((eh->tls_mask & TLS_GD) != 0)
3131 htab->got->_raw_size += 8;
3132 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
3133 htab->got->_raw_size += 4;
3134 if ((eh->tls_mask & TLS_DTPREL) != 0)
3135 htab->got->_raw_size += 4;
3136 }
3137 else
3138 htab->got->_raw_size += 4;
3139 dyn = htab->elf.dynamic_sections_created;
3140 if ((info->shared
3141 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
3142 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
3143 || eh->elf.root.type != bfd_link_hash_undefweak))
3144 {
3145 /* All the entries we allocated need relocs. */
3146 htab->relgot->_raw_size
3147 += ((htab->got->_raw_size - eh->elf.got.offset) / 4
3148 * sizeof (Elf32_External_Rela));
3149 /* Except LD only needs one. */
3150 if ((eh->tls_mask & TLS_LD) != 0)
3151 htab->relgot->_raw_size -= sizeof (Elf32_External_Rela);
3152 }
3153 }
3154 }
3155 else
3156 eh->elf.got.offset = (bfd_vma) -1;
3157
3158 if (eh->dyn_relocs == NULL)
3159 return TRUE;
3160
3161 /* In the shared -Bsymbolic case, discard space allocated for
3162 dynamic pc-relative relocs against symbols which turn out to be
3163 defined in regular objects. For the normal shared case, discard
3164 space for relocs that have become local due to symbol visibility
3165 changes. */
3166
3167 if (info->shared)
3168 {
3169 /* Relocs that use pc_count are those that appear on a call insn,
3170 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
3171 generated via assembly. We want calls to protected symbols to
3172 resolve directly to the function rather than going via the plt.
3173 If people want function pointer comparisons to work as expected
3174 then they should avoid writing weird assembly. */
3175 if (SYMBOL_CALLS_LOCAL (info, h))
3176 {
3177 struct ppc_elf_dyn_relocs **pp;
3178
3179 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3180 {
3181 p->count -= p->pc_count;
3182 p->pc_count = 0;
3183 if (p->count == 0)
3184 *pp = p->next;
3185 else
3186 pp = &p->next;
3187 }
3188 }
3189
3190 /* Also discard relocs on undefined weak syms with non-default
3191 visibility. */
3192 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3193 && h->root.type == bfd_link_hash_undefweak)
3194 eh->dyn_relocs = NULL;
3195 }
3196 else if (ELIMINATE_COPY_RELOCS)
3197 {
3198 /* For the non-shared case, discard space for relocs against
3199 symbols which turn out to need copy relocs or are not
3200 dynamic. */
3201
3202 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3203 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3204 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3205 {
3206 /* Make sure this symbol is output as a dynamic symbol.
3207 Undefined weak syms won't yet be marked as dynamic. */
3208 if (h->dynindx == -1
3209 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3210 {
3211 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
3212 return FALSE;
3213 }
3214
3215 /* If that succeeded, we know we'll be keeping all the
3216 relocs. */
3217 if (h->dynindx != -1)
3218 goto keep;
3219 }
3220
3221 eh->dyn_relocs = NULL;
3222
3223 keep: ;
3224 }
3225
3226 /* Finally, allocate space. */
3227 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3228 {
3229 asection *sreloc = elf_section_data (p->sec)->sreloc;
3230 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
3231 }
3232
3233 return TRUE;
3234 }
3235
3236 /* Find any dynamic relocs that apply to read-only sections. */
3237
3238 static bfd_boolean
3239 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
3240 {
3241 struct ppc_elf_dyn_relocs *p;
3242
3243 if (h->root.type == bfd_link_hash_indirect)
3244 return TRUE;
3245
3246 if (h->root.type == bfd_link_hash_warning)
3247 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3248
3249 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3250 {
3251 asection *s = p->sec->output_section;
3252
3253 if (s != NULL
3254 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
3255 == (SEC_READONLY | SEC_ALLOC)))
3256 {
3257 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
3258
3259 /* Not an error, just cut short the traversal. */
3260 return FALSE;
3261 }
3262 }
3263 return TRUE;
3264 }
3265
3266 /* Set the sizes of the dynamic sections. */
3267
3268 static bfd_boolean
3269 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3270 struct bfd_link_info *info)
3271 {
3272 struct ppc_elf_link_hash_table *htab;
3273 asection *s;
3274 bfd_boolean relocs;
3275 bfd *ibfd;
3276
3277 #ifdef DEBUG
3278 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
3279 #endif
3280
3281 htab = ppc_elf_hash_table (info);
3282 BFD_ASSERT (htab->elf.dynobj != NULL);
3283
3284 if (elf_hash_table (info)->dynamic_sections_created)
3285 {
3286 /* Set the contents of the .interp section to the interpreter. */
3287 if (info->executable)
3288 {
3289 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
3290 BFD_ASSERT (s != NULL);
3291 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3292 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3293 }
3294 }
3295
3296 if (htab->tlsld_got.refcount > 0)
3297 {
3298 htab->tlsld_got.offset = htab->got->_raw_size;
3299 htab->got->_raw_size += 8;
3300 if (info->shared)
3301 htab->relgot->_raw_size += sizeof (Elf32_External_Rela);
3302 }
3303 else
3304 htab->tlsld_got.offset = (bfd_vma) -1;
3305
3306 /* Set up .got offsets for local syms, and space for local dynamic
3307 relocs. */
3308 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3309 {
3310 bfd_signed_vma *local_got;
3311 bfd_signed_vma *end_local_got;
3312 char *lgot_masks;
3313 bfd_size_type locsymcount;
3314 Elf_Internal_Shdr *symtab_hdr;
3315 asection *srel;
3316
3317 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
3318 continue;
3319
3320 for (s = ibfd->sections; s != NULL; s = s->next)
3321 {
3322 struct ppc_elf_dyn_relocs *p;
3323
3324 for (p = ((struct ppc_elf_dyn_relocs *)
3325 elf_section_data (s)->local_dynrel);
3326 p != NULL;
3327 p = p->next)
3328 {
3329 if (!bfd_is_abs_section (p->sec)
3330 && bfd_is_abs_section (p->sec->output_section))
3331 {
3332 /* Input section has been discarded, either because
3333 it is a copy of a linkonce section or due to
3334 linker script /DISCARD/, so we'll be discarding
3335 the relocs too. */
3336 }
3337 else if (p->count != 0)
3338 {
3339 elf_section_data (p->sec)->sreloc->_raw_size
3340 += p->count * sizeof (Elf32_External_Rela);
3341 if ((p->sec->output_section->flags
3342 & (SEC_READONLY | SEC_ALLOC))
3343 == (SEC_READONLY | SEC_ALLOC))
3344 info->flags |= DF_TEXTREL;
3345 }
3346 }
3347 }
3348
3349 local_got = elf_local_got_refcounts (ibfd);
3350 if (!local_got)
3351 continue;
3352
3353 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3354 locsymcount = symtab_hdr->sh_info;
3355 end_local_got = local_got + locsymcount;
3356 lgot_masks = (char *) end_local_got;
3357 s = htab->got;
3358 srel = htab->relgot;
3359 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3360 if (*local_got > 0)
3361 {
3362 if (*lgot_masks == (TLS_TLS | TLS_LD))
3363 {
3364 /* If just an LD reloc, we'll just use
3365 htab->tlsld_got.offset. */
3366 if (htab->tlsld_got.offset == (bfd_vma) -1)
3367 {
3368 htab->tlsld_got.offset = s->_raw_size;
3369 s->_raw_size += 8;
3370 if (info->shared)
3371 srel->_raw_size += sizeof (Elf32_External_Rela);
3372 }
3373 *local_got = (bfd_vma) -1;
3374 }
3375 else
3376 {
3377 *local_got = s->_raw_size;
3378 if ((*lgot_masks & TLS_TLS) != 0)
3379 {
3380 if ((*lgot_masks & TLS_GD) != 0)
3381 s->_raw_size += 8;
3382 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
3383 s->_raw_size += 4;
3384 if ((*lgot_masks & TLS_DTPREL) != 0)
3385 s->_raw_size += 4;
3386 }
3387 else
3388 s->_raw_size += 4;
3389 if (info->shared)
3390 srel->_raw_size += ((s->_raw_size - *local_got) / 4
3391 * sizeof (Elf32_External_Rela));
3392 }
3393 }
3394 else
3395 *local_got = (bfd_vma) -1;
3396 }
3397
3398 /* Allocate space for global sym dynamic relocs. */
3399 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3400
3401 /* We've now determined the sizes of the various dynamic sections.
3402 Allocate memory for them. */
3403 relocs = FALSE;
3404 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
3405 {
3406 if ((s->flags & SEC_LINKER_CREATED) == 0)
3407 continue;
3408
3409 if (s == htab->plt
3410 || s == htab->got
3411 || (htab->sdata != NULL && s == htab->sdata->section)
3412 || (htab->sdata2 != NULL && s == htab->sdata2->section))
3413 {
3414 /* Strip this section if we don't need it; see the
3415 comment below. */
3416 }
3417 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
3418 {
3419 if (s->_raw_size == 0)
3420 {
3421 /* If we don't need this section, strip it from the
3422 output file. This is mostly to handle .rela.bss and
3423 .rela.plt. We must create both sections in
3424 create_dynamic_sections, because they must be created
3425 before the linker maps input sections to output
3426 sections. The linker does that before
3427 adjust_dynamic_symbol is called, and it is that
3428 function which decides whether anything needs to go
3429 into these sections. */
3430 }
3431 else
3432 {
3433 /* Remember whether there are any relocation sections. */
3434 relocs = TRUE;
3435
3436 /* We use the reloc_count field as a counter if we need
3437 to copy relocs into the output file. */
3438 s->reloc_count = 0;
3439 }
3440 }
3441 else
3442 {
3443 /* It's not one of our sections, so don't allocate space. */
3444 continue;
3445 }
3446
3447 if (s->_raw_size == 0)
3448 {
3449 _bfd_strip_section_from_output (info, s);
3450 continue;
3451 }
3452
3453 /* Allocate memory for the section contents. */
3454 s->contents = bfd_zalloc (htab->elf.dynobj, s->_raw_size);
3455 if (s->contents == NULL)
3456 return FALSE;
3457 }
3458
3459 if (htab->elf.dynamic_sections_created)
3460 {
3461 /* Add some entries to the .dynamic section. We fill in the
3462 values later, in ppc_elf_finish_dynamic_sections, but we
3463 must add the entries now so that we get the correct size for
3464 the .dynamic section. The DT_DEBUG entry is filled in by the
3465 dynamic linker and used by the debugger. */
3466 #define add_dynamic_entry(TAG, VAL) \
3467 bfd_elf32_add_dynamic_entry (info, (TAG), (VAL))
3468
3469 if (info->executable)
3470 {
3471 if (!add_dynamic_entry (DT_DEBUG, 0))
3472 return FALSE;
3473 }
3474
3475 if (htab->plt != NULL && htab->plt->_raw_size != 0)
3476 {
3477 if (!add_dynamic_entry (DT_PLTGOT, 0)
3478 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3479 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3480 || !add_dynamic_entry (DT_JMPREL, 0))
3481 return FALSE;
3482 }
3483
3484 if (relocs)
3485 {
3486 if (!add_dynamic_entry (DT_RELA, 0)
3487 || !add_dynamic_entry (DT_RELASZ, 0)
3488 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3489 return FALSE;
3490 }
3491
3492 /* If any dynamic relocs apply to a read-only section, then we
3493 need a DT_TEXTREL entry. */
3494 if ((info->flags & DF_TEXTREL) == 0)
3495 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
3496 info);
3497
3498 if ((info->flags & DF_TEXTREL) != 0)
3499 {
3500 if (!add_dynamic_entry (DT_TEXTREL, 0))
3501 return FALSE;
3502 }
3503 }
3504 #undef add_dynamic_entry
3505
3506 return TRUE;
3507 }
3508 \f
3509 static bfd_boolean
3510 update_local_sym_info (bfd *abfd,
3511 Elf_Internal_Shdr *symtab_hdr,
3512 unsigned long r_symndx,
3513 int tls_type)
3514 {
3515 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3516 char *local_got_tls_masks;
3517
3518 if (local_got_refcounts == NULL)
3519 {
3520 bfd_size_type size = symtab_hdr->sh_info;
3521
3522 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3523 local_got_refcounts = bfd_zalloc (abfd, size);
3524 if (local_got_refcounts == NULL)
3525 return FALSE;
3526 elf_local_got_refcounts (abfd) = local_got_refcounts;
3527 }
3528
3529 local_got_refcounts[r_symndx] += 1;
3530 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3531 local_got_tls_masks[r_symndx] |= tls_type;
3532 return TRUE;
3533 }
3534
3535 static void
3536 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3537 {
3538 (*_bfd_error_handler)
3539 (_("%s: relocation %s cannot be used when making a shared object"),
3540 bfd_archive_filename (abfd),
3541 ppc_elf_howto_table[r_type]->name);
3542 bfd_set_error (bfd_error_bad_value);
3543 }
3544
3545 /* Look through the relocs for a section during the first phase, and
3546 allocate space in the global offset table or procedure linkage
3547 table. */
3548
3549 static bfd_boolean
3550 ppc_elf_check_relocs (bfd *abfd,
3551 struct bfd_link_info *info,
3552 asection *sec,
3553 const Elf_Internal_Rela *relocs)
3554 {
3555 struct ppc_elf_link_hash_table *htab;
3556 Elf_Internal_Shdr *symtab_hdr;
3557 struct elf_link_hash_entry **sym_hashes;
3558 const Elf_Internal_Rela *rel;
3559 const Elf_Internal_Rela *rel_end;
3560 asection *sreloc;
3561
3562 if (info->relocatable)
3563 return TRUE;
3564
3565 #ifdef DEBUG
3566 fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n",
3567 bfd_get_section_name (abfd, sec),
3568 bfd_archive_filename (abfd));
3569 #endif
3570
3571 /* Initialize howto table if not already done. */
3572 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3573 ppc_elf_howto_init ();
3574
3575 /* Create the linker generated sections all the time so that the
3576 special symbols are created. */
3577 htab = ppc_elf_hash_table (info);
3578 if (htab->sdata == NULL)
3579 {
3580 htab->sdata = ppc_elf_create_linker_section (abfd, info,
3581 LINKER_SECTION_SDATA);
3582 if (htab->sdata == NULL)
3583 return FALSE;
3584 }
3585
3586 if (htab->sdata2 == NULL)
3587 {
3588 htab->sdata2 = ppc_elf_create_linker_section (abfd, info,
3589 LINKER_SECTION_SDATA2);
3590 if (htab->sdata2 == NULL)
3591 return FALSE;
3592 }
3593
3594 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3595 sym_hashes = elf_sym_hashes (abfd);
3596 sreloc = NULL;
3597
3598 rel_end = relocs + sec->reloc_count;
3599 for (rel = relocs; rel < rel_end; rel++)
3600 {
3601 unsigned long r_symndx;
3602 enum elf_ppc_reloc_type r_type;
3603 struct elf_link_hash_entry *h;
3604 int tls_type = 0;
3605
3606 r_symndx = ELF32_R_SYM (rel->r_info);
3607 if (r_symndx < symtab_hdr->sh_info)
3608 h = NULL;
3609 else
3610 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3611
3612 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3613 This shows up in particular in an R_PPC_ADDR32 in the eabi
3614 startup code. */
3615 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3616 {
3617 if (htab->got == NULL)
3618 {
3619 if (htab->elf.dynobj == NULL)
3620 htab->elf.dynobj = abfd;
3621 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3622 return FALSE;
3623 }
3624 }
3625
3626 r_type = ELF32_R_TYPE (rel->r_info);
3627 switch (r_type)
3628 {
3629 case R_PPC_GOT_TLSLD16:
3630 case R_PPC_GOT_TLSLD16_LO:
3631 case R_PPC_GOT_TLSLD16_HI:
3632 case R_PPC_GOT_TLSLD16_HA:
3633 htab->tlsld_got.refcount += 1;
3634 tls_type = TLS_TLS | TLS_LD;
3635 goto dogottls;
3636
3637 case R_PPC_GOT_TLSGD16:
3638 case R_PPC_GOT_TLSGD16_LO:
3639 case R_PPC_GOT_TLSGD16_HI:
3640 case R_PPC_GOT_TLSGD16_HA:
3641 tls_type = TLS_TLS | TLS_GD;
3642 goto dogottls;
3643
3644 case R_PPC_GOT_TPREL16:
3645 case R_PPC_GOT_TPREL16_LO:
3646 case R_PPC_GOT_TPREL16_HI:
3647 case R_PPC_GOT_TPREL16_HA:
3648 if (info->shared)
3649 info->flags |= DF_STATIC_TLS;
3650 tls_type = TLS_TLS | TLS_TPREL;
3651 goto dogottls;
3652
3653 case R_PPC_GOT_DTPREL16:
3654 case R_PPC_GOT_DTPREL16_LO:
3655 case R_PPC_GOT_DTPREL16_HI:
3656 case R_PPC_GOT_DTPREL16_HA:
3657 tls_type = TLS_TLS | TLS_DTPREL;
3658 dogottls:
3659 sec->has_tls_reloc = 1;
3660 /* Fall thru */
3661
3662 /* GOT16 relocations */
3663 case R_PPC_GOT16:
3664 case R_PPC_GOT16_LO:
3665 case R_PPC_GOT16_HI:
3666 case R_PPC_GOT16_HA:
3667 /* This symbol requires a global offset table entry. */
3668 if (htab->got == NULL)
3669 {
3670 if (htab->elf.dynobj == NULL)
3671 htab->elf.dynobj = abfd;
3672 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3673 return FALSE;
3674 }
3675 if (h != NULL)
3676 {
3677 h->got.refcount += 1;
3678 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3679 }
3680 else
3681 /* This is a global offset table entry for a local symbol. */
3682 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3683 return FALSE;
3684 break;
3685
3686 /* Indirect .sdata relocation. */
3687 case R_PPC_EMB_SDAI16:
3688 if (info->shared)
3689 {
3690 bad_shared_reloc (abfd, r_type);
3691 return FALSE;
3692 }
3693 if (!elf_create_pointer_linker_section (abfd, info,
3694 htab->sdata, h, rel))
3695 return FALSE;
3696 break;
3697
3698 /* Indirect .sdata2 relocation. */
3699 case R_PPC_EMB_SDA2I16:
3700 if (info->shared)
3701 {
3702 bad_shared_reloc (abfd, r_type);
3703 return FALSE;
3704 }
3705 if (!elf_create_pointer_linker_section (abfd, info,
3706 htab->sdata2, h, rel))
3707 return FALSE;
3708 break;
3709
3710 case R_PPC_SDAREL16:
3711 case R_PPC_EMB_SDA2REL:
3712 case R_PPC_EMB_SDA21:
3713 case R_PPC_EMB_RELSDA:
3714 case R_PPC_EMB_NADDR32:
3715 case R_PPC_EMB_NADDR16:
3716 case R_PPC_EMB_NADDR16_LO:
3717 case R_PPC_EMB_NADDR16_HI:
3718 case R_PPC_EMB_NADDR16_HA:
3719 if (info->shared)
3720 {
3721 bad_shared_reloc (abfd, r_type);
3722 return FALSE;
3723 }
3724 break;
3725
3726 case R_PPC_PLT32:
3727 case R_PPC_PLTREL24:
3728 case R_PPC_PLTREL32:
3729 case R_PPC_PLT16_LO:
3730 case R_PPC_PLT16_HI:
3731 case R_PPC_PLT16_HA:
3732 #ifdef DEBUG
3733 fprintf (stderr, "Reloc requires a PLT entry\n");
3734 #endif
3735 /* This symbol requires a procedure linkage table entry. We
3736 actually build the entry in finish_dynamic_symbol,
3737 because this might be a case of linking PIC code without
3738 linking in any dynamic objects, in which case we don't
3739 need to generate a procedure linkage table after all. */
3740
3741 if (h == NULL)
3742 {
3743 /* It does not make sense to have a procedure linkage
3744 table entry for a local symbol. */
3745 (*_bfd_error_handler) (_("%s(%s+0x%lx): %s reloc against "
3746 "local symbol"),
3747 bfd_archive_filename (abfd),
3748 sec->name,
3749 (long) rel->r_offset,
3750 ppc_elf_howto_table[r_type]->name);
3751 bfd_set_error (bfd_error_bad_value);
3752 return FALSE;
3753 }
3754
3755 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3756 h->plt.refcount++;
3757 break;
3758
3759 /* The following relocations don't need to propagate the
3760 relocation if linking a shared object since they are
3761 section relative. */
3762 case R_PPC_SECTOFF:
3763 case R_PPC_SECTOFF_LO:
3764 case R_PPC_SECTOFF_HI:
3765 case R_PPC_SECTOFF_HA:
3766 case R_PPC_DTPREL16:
3767 case R_PPC_DTPREL16_LO:
3768 case R_PPC_DTPREL16_HI:
3769 case R_PPC_DTPREL16_HA:
3770 case R_PPC_TOC16:
3771 break;
3772
3773 /* This are just markers. */
3774 case R_PPC_TLS:
3775 case R_PPC_EMB_MRKREF:
3776 case R_PPC_NONE:
3777 case R_PPC_max:
3778 break;
3779
3780 /* These should only appear in dynamic objects. */
3781 case R_PPC_COPY:
3782 case R_PPC_GLOB_DAT:
3783 case R_PPC_JMP_SLOT:
3784 case R_PPC_RELATIVE:
3785 break;
3786
3787 /* These aren't handled yet. We'll report an error later. */
3788 case R_PPC_ADDR30:
3789 case R_PPC_EMB_RELSEC16:
3790 case R_PPC_EMB_RELST_LO:
3791 case R_PPC_EMB_RELST_HI:
3792 case R_PPC_EMB_RELST_HA:
3793 case R_PPC_EMB_BIT_FLD:
3794 break;
3795
3796 /* This refers only to functions defined in the shared library. */
3797 case R_PPC_LOCAL24PC:
3798 break;
3799
3800 /* This relocation describes the C++ object vtable hierarchy.
3801 Reconstruct it for later use during GC. */
3802 case R_PPC_GNU_VTINHERIT:
3803 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3804 return FALSE;
3805 break;
3806
3807 /* This relocation describes which C++ vtable entries are actually
3808 used. Record for later use during GC. */
3809 case R_PPC_GNU_VTENTRY:
3810 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3811 return FALSE;
3812 break;
3813
3814 /* We shouldn't really be seeing these. */
3815 case R_PPC_TPREL32:
3816 if (info->shared)
3817 info->flags |= DF_STATIC_TLS;
3818 goto dodyn;
3819
3820 /* Nor these. */
3821 case R_PPC_DTPMOD32:
3822 case R_PPC_DTPREL32:
3823 goto dodyn;
3824
3825 case R_PPC_TPREL16:
3826 case R_PPC_TPREL16_LO:
3827 case R_PPC_TPREL16_HI:
3828 case R_PPC_TPREL16_HA:
3829 if (info->shared)
3830 info->flags |= DF_STATIC_TLS;
3831 goto dodyn;
3832
3833 /* When creating a shared object, we must copy these
3834 relocs into the output file. We create a reloc
3835 section in dynobj and make room for the reloc. */
3836 case R_PPC_REL24:
3837 case R_PPC_REL14:
3838 case R_PPC_REL14_BRTAKEN:
3839 case R_PPC_REL14_BRNTAKEN:
3840 case R_PPC_REL32:
3841 if (h == NULL
3842 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3843 break;
3844 /* fall through */
3845
3846 case R_PPC_ADDR32:
3847 case R_PPC_ADDR24:
3848 case R_PPC_ADDR16:
3849 case R_PPC_ADDR16_LO:
3850 case R_PPC_ADDR16_HI:
3851 case R_PPC_ADDR16_HA:
3852 case R_PPC_ADDR14:
3853 case R_PPC_ADDR14_BRTAKEN:
3854 case R_PPC_ADDR14_BRNTAKEN:
3855 case R_PPC_UADDR32:
3856 case R_PPC_UADDR16:
3857 if (h != NULL && !info->shared)
3858 {
3859 /* We may need a plt entry if the symbol turns out to be
3860 a function defined in a dynamic object. */
3861 h->plt.refcount++;
3862
3863 /* We may need a copy reloc too. */
3864 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3865 }
3866
3867 dodyn:
3868 /* If we are creating a shared library, and this is a reloc
3869 against a global symbol, or a non PC relative reloc
3870 against a local symbol, then we need to copy the reloc
3871 into the shared library. However, if we are linking with
3872 -Bsymbolic, we do not need to copy a reloc against a
3873 global symbol which is defined in an object we are
3874 including in the link (i.e., DEF_REGULAR is set). At
3875 this point we have not seen all the input files, so it is
3876 possible that DEF_REGULAR is not set now but will be set
3877 later (it is never cleared). In case of a weak definition,
3878 DEF_REGULAR may be cleared later by a strong definition in
3879 a shared library. We account for that possibility below by
3880 storing information in the dyn_relocs field of the hash
3881 table entry. A similar situation occurs when creating
3882 shared libraries and symbol visibility changes render the
3883 symbol local.
3884
3885 If on the other hand, we are creating an executable, we
3886 may need to keep relocations for symbols satisfied by a
3887 dynamic library if we manage to avoid copy relocs for the
3888 symbol. */
3889 if ((info->shared
3890 && (MUST_BE_DYN_RELOC (r_type)
3891 || (h != NULL
3892 && (! info->symbolic
3893 || h->root.type == bfd_link_hash_defweak
3894 || (h->elf_link_hash_flags
3895 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3896 || (ELIMINATE_COPY_RELOCS
3897 && !info->shared
3898 && (sec->flags & SEC_ALLOC) != 0
3899 && h != NULL
3900 && (h->root.type == bfd_link_hash_defweak
3901 || (h->elf_link_hash_flags
3902 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3903 {
3904 struct ppc_elf_dyn_relocs *p;
3905 struct ppc_elf_dyn_relocs **head;
3906
3907 #ifdef DEBUG
3908 fprintf (stderr,
3909 "ppc_elf_check_relocs needs to "
3910 "create relocation for %s\n",
3911 (h && h->root.root.string
3912 ? h->root.root.string : "<unknown>"));
3913 #endif
3914 if (sreloc == NULL)
3915 {
3916 const char *name;
3917
3918 name = (bfd_elf_string_from_elf_section
3919 (abfd,
3920 elf_elfheader (abfd)->e_shstrndx,
3921 elf_section_data (sec)->rel_hdr.sh_name));
3922 if (name == NULL)
3923 return FALSE;
3924
3925 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3926 && strcmp (bfd_get_section_name (abfd, sec),
3927 name + 5) == 0);
3928
3929 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3930 if (sreloc == NULL)
3931 {
3932 flagword flags;
3933
3934 sreloc = bfd_make_section (htab->elf.dynobj, name);
3935 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3936 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3937 if ((sec->flags & SEC_ALLOC) != 0)
3938 flags |= SEC_ALLOC | SEC_LOAD;
3939 if (sreloc == NULL
3940 || ! bfd_set_section_flags (htab->elf.dynobj,
3941 sreloc, flags)
3942 || ! bfd_set_section_alignment (htab->elf.dynobj,
3943 sreloc, 2))
3944 return FALSE;
3945 }
3946 elf_section_data (sec)->sreloc = sreloc;
3947 }
3948
3949 /* If this is a global symbol, we count the number of
3950 relocations we need for this symbol. */
3951 if (h != NULL)
3952 {
3953 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3954 }
3955 else
3956 {
3957 /* Track dynamic relocs needed for local syms too.
3958 We really need local syms available to do this
3959 easily. Oh well. */
3960
3961 asection *s;
3962 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3963 sec, r_symndx);
3964 if (s == NULL)
3965 return FALSE;
3966
3967 head = ((struct ppc_elf_dyn_relocs **)
3968 &elf_section_data (s)->local_dynrel);
3969 }
3970
3971 p = *head;
3972 if (p == NULL || p->sec != sec)
3973 {
3974 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3975 if (p == NULL)
3976 return FALSE;
3977 p->next = *head;
3978 *head = p;
3979 p->sec = sec;
3980 p->count = 0;
3981 p->pc_count = 0;
3982 }
3983
3984 p->count += 1;
3985 if (!MUST_BE_DYN_RELOC (r_type))
3986 p->pc_count += 1;
3987 }
3988
3989 break;
3990 }
3991 }
3992
3993 return TRUE;
3994 }
3995
3996 /* Return the section that should be marked against GC for a given
3997 relocation. */
3998
3999 static asection *
4000 ppc_elf_gc_mark_hook (asection *sec,
4001 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4002 Elf_Internal_Rela *rel,
4003 struct elf_link_hash_entry *h,
4004 Elf_Internal_Sym *sym)
4005 {
4006 if (h != NULL)
4007 {
4008 switch (ELF32_R_TYPE (rel->r_info))
4009 {
4010 case R_PPC_GNU_VTINHERIT:
4011 case R_PPC_GNU_VTENTRY:
4012 break;
4013
4014 default:
4015 switch (h->root.type)
4016 {
4017 case bfd_link_hash_defined:
4018 case bfd_link_hash_defweak:
4019 return h->root.u.def.section;
4020
4021 case bfd_link_hash_common:
4022 return h->root.u.c.p->section;
4023
4024 default:
4025 break;
4026 }
4027 }
4028 }
4029 else
4030 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4031
4032 return NULL;
4033 }
4034
4035 /* Update the got, plt and dynamic reloc reference counts for the
4036 section being removed. */
4037
4038 static bfd_boolean
4039 ppc_elf_gc_sweep_hook (bfd *abfd,
4040 struct bfd_link_info *info,
4041 asection *sec,
4042 const Elf_Internal_Rela *relocs)
4043 {
4044 struct ppc_elf_link_hash_table *htab;
4045 Elf_Internal_Shdr *symtab_hdr;
4046 struct elf_link_hash_entry **sym_hashes;
4047 bfd_signed_vma *local_got_refcounts;
4048 const Elf_Internal_Rela *rel, *relend;
4049
4050 elf_section_data (sec)->local_dynrel = NULL;
4051
4052 htab = ppc_elf_hash_table (info);
4053 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4054 sym_hashes = elf_sym_hashes (abfd);
4055 local_got_refcounts = elf_local_got_refcounts (abfd);
4056
4057 relend = relocs + sec->reloc_count;
4058 for (rel = relocs; rel < relend; rel++)
4059 {
4060 unsigned long r_symndx;
4061 enum elf_ppc_reloc_type r_type;
4062 struct elf_link_hash_entry *h = NULL;
4063
4064 r_symndx = ELF32_R_SYM (rel->r_info);
4065 if (r_symndx >= symtab_hdr->sh_info)
4066 {
4067 struct ppc_elf_dyn_relocs **pp, *p;
4068 struct ppc_elf_link_hash_entry *eh;
4069
4070 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4071 eh = (struct ppc_elf_link_hash_entry *) h;
4072
4073 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4074 if (p->sec == sec)
4075 {
4076 /* Everything must go for SEC. */
4077 *pp = p->next;
4078 break;
4079 }
4080 }
4081
4082 r_type = ELF32_R_TYPE (rel->r_info);
4083 switch (r_type)
4084 {
4085 case R_PPC_GOT_TLSLD16:
4086 case R_PPC_GOT_TLSLD16_LO:
4087 case R_PPC_GOT_TLSLD16_HI:
4088 case R_PPC_GOT_TLSLD16_HA:
4089 htab->tlsld_got.refcount -= 1;
4090 /* Fall thru */
4091
4092 case R_PPC_GOT_TLSGD16:
4093 case R_PPC_GOT_TLSGD16_LO:
4094 case R_PPC_GOT_TLSGD16_HI:
4095 case R_PPC_GOT_TLSGD16_HA:
4096 case R_PPC_GOT_TPREL16:
4097 case R_PPC_GOT_TPREL16_LO:
4098 case R_PPC_GOT_TPREL16_HI:
4099 case R_PPC_GOT_TPREL16_HA:
4100 case R_PPC_GOT_DTPREL16:
4101 case R_PPC_GOT_DTPREL16_LO:
4102 case R_PPC_GOT_DTPREL16_HI:
4103 case R_PPC_GOT_DTPREL16_HA:
4104 case R_PPC_GOT16:
4105 case R_PPC_GOT16_LO:
4106 case R_PPC_GOT16_HI:
4107 case R_PPC_GOT16_HA:
4108 if (h != NULL)
4109 {
4110 if (h->got.refcount > 0)
4111 h->got.refcount--;
4112 }
4113 else if (local_got_refcounts != NULL)
4114 {
4115 if (local_got_refcounts[r_symndx] > 0)
4116 local_got_refcounts[r_symndx]--;
4117 }
4118 break;
4119
4120 case R_PPC_REL24:
4121 case R_PPC_REL14:
4122 case R_PPC_REL14_BRTAKEN:
4123 case R_PPC_REL14_BRNTAKEN:
4124 case R_PPC_REL32:
4125 if (h == NULL
4126 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4127 break;
4128 /* Fall thru */
4129
4130 case R_PPC_ADDR32:
4131 case R_PPC_ADDR24:
4132 case R_PPC_ADDR16:
4133 case R_PPC_ADDR16_LO:
4134 case R_PPC_ADDR16_HI:
4135 case R_PPC_ADDR16_HA:
4136 case R_PPC_ADDR14:
4137 case R_PPC_ADDR14_BRTAKEN:
4138 case R_PPC_ADDR14_BRNTAKEN:
4139 case R_PPC_UADDR32:
4140 case R_PPC_UADDR16:
4141 case R_PPC_PLT32:
4142 case R_PPC_PLTREL24:
4143 case R_PPC_PLT16_LO:
4144 case R_PPC_PLT16_HI:
4145 case R_PPC_PLT16_HA:
4146 if (h != NULL)
4147 {
4148 if (h->plt.refcount > 0)
4149 h->plt.refcount--;
4150 }
4151 break;
4152
4153 default:
4154 break;
4155 }
4156 }
4157 return TRUE;
4158 }
4159
4160 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4161
4162 asection *
4163 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4164 {
4165 struct ppc_elf_link_hash_table *htab;
4166
4167 htab = ppc_elf_hash_table (info);
4168 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4169 FALSE, FALSE, TRUE);
4170
4171 return _bfd_elf_tls_setup (obfd, info);
4172 }
4173
4174 /* Run through all the TLS relocs looking for optimization
4175 opportunities. */
4176
4177 bfd_boolean
4178 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4179 struct bfd_link_info *info)
4180 {
4181 bfd *ibfd;
4182 asection *sec;
4183 struct ppc_elf_link_hash_table *htab;
4184
4185 if (info->relocatable || info->shared)
4186 return TRUE;
4187
4188 htab = ppc_elf_hash_table (info);
4189 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4190 {
4191 Elf_Internal_Sym *locsyms = NULL;
4192 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4193
4194 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4195 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4196 {
4197 Elf_Internal_Rela *relstart, *rel, *relend;
4198 int expecting_tls_get_addr;
4199
4200 /* Read the relocations. */
4201 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4202 info->keep_memory);
4203 if (relstart == NULL)
4204 return FALSE;
4205
4206 expecting_tls_get_addr = 0;
4207 relend = relstart + sec->reloc_count;
4208 for (rel = relstart; rel < relend; rel++)
4209 {
4210 enum elf_ppc_reloc_type r_type;
4211 unsigned long r_symndx;
4212 struct elf_link_hash_entry *h = NULL;
4213 char *tls_mask;
4214 char tls_set, tls_clear;
4215 bfd_boolean is_local;
4216
4217 r_symndx = ELF32_R_SYM (rel->r_info);
4218 if (r_symndx >= symtab_hdr->sh_info)
4219 {
4220 struct elf_link_hash_entry **sym_hashes;
4221
4222 sym_hashes = elf_sym_hashes (ibfd);
4223 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4224 while (h->root.type == bfd_link_hash_indirect
4225 || h->root.type == bfd_link_hash_warning)
4226 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4227 }
4228
4229 is_local = FALSE;
4230 if (h == NULL
4231 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
4232 is_local = TRUE;
4233
4234 r_type = ELF32_R_TYPE (rel->r_info);
4235 switch (r_type)
4236 {
4237 case R_PPC_GOT_TLSLD16:
4238 case R_PPC_GOT_TLSLD16_LO:
4239 case R_PPC_GOT_TLSLD16_HI:
4240 case R_PPC_GOT_TLSLD16_HA:
4241 /* These relocs should never be against a symbol
4242 defined in a shared lib. Leave them alone if
4243 that turns out to be the case. */
4244 expecting_tls_get_addr = 0;
4245 htab->tlsld_got.refcount -= 1;
4246 if (!is_local)
4247 continue;
4248
4249 /* LD -> LE */
4250 tls_set = 0;
4251 tls_clear = TLS_LD;
4252 expecting_tls_get_addr = 1;
4253 break;
4254
4255 case R_PPC_GOT_TLSGD16:
4256 case R_PPC_GOT_TLSGD16_LO:
4257 case R_PPC_GOT_TLSGD16_HI:
4258 case R_PPC_GOT_TLSGD16_HA:
4259 if (is_local)
4260 /* GD -> LE */
4261 tls_set = 0;
4262 else
4263 /* GD -> IE */
4264 tls_set = TLS_TLS | TLS_TPRELGD;
4265 tls_clear = TLS_GD;
4266 expecting_tls_get_addr = 1;
4267 break;
4268
4269 case R_PPC_GOT_TPREL16:
4270 case R_PPC_GOT_TPREL16_LO:
4271 case R_PPC_GOT_TPREL16_HI:
4272 case R_PPC_GOT_TPREL16_HA:
4273 expecting_tls_get_addr = 0;
4274 if (is_local)
4275 {
4276 /* IE -> LE */
4277 tls_set = 0;
4278 tls_clear = TLS_TPREL;
4279 break;
4280 }
4281 else
4282 continue;
4283
4284 case R_PPC_REL14:
4285 case R_PPC_REL14_BRTAKEN:
4286 case R_PPC_REL14_BRNTAKEN:
4287 case R_PPC_REL24:
4288 if (expecting_tls_get_addr
4289 && h != NULL
4290 && h == htab->tls_get_addr)
4291 {
4292 if (h->plt.refcount > 0)
4293 h->plt.refcount -= 1;
4294 }
4295 expecting_tls_get_addr = 0;
4296 continue;
4297
4298 default:
4299 expecting_tls_get_addr = 0;
4300 continue;
4301 }
4302
4303 if (h != NULL)
4304 {
4305 if (tls_set == 0)
4306 {
4307 /* We managed to get rid of a got entry. */
4308 if (h->got.refcount > 0)
4309 h->got.refcount -= 1;
4310 }
4311 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4312 }
4313 else
4314 {
4315 Elf_Internal_Sym *sym;
4316 bfd_signed_vma *lgot_refs;
4317 char *lgot_masks;
4318
4319 if (locsyms == NULL)
4320 {
4321 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4322 if (locsyms == NULL)
4323 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4324 symtab_hdr->sh_info,
4325 0, NULL, NULL, NULL);
4326 if (locsyms == NULL)
4327 {
4328 if (elf_section_data (sec)->relocs != relstart)
4329 free (relstart);
4330 return FALSE;
4331 }
4332 }
4333 sym = locsyms + r_symndx;
4334 lgot_refs = elf_local_got_refcounts (ibfd);
4335 if (lgot_refs == NULL)
4336 abort ();
4337 if (tls_set == 0)
4338 {
4339 /* We managed to get rid of a got entry. */
4340 if (lgot_refs[r_symndx] > 0)
4341 lgot_refs[r_symndx] -= 1;
4342 }
4343 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4344 tls_mask = &lgot_masks[r_symndx];
4345 }
4346
4347 *tls_mask |= tls_set;
4348 *tls_mask &= ~tls_clear;
4349 }
4350
4351 if (elf_section_data (sec)->relocs != relstart)
4352 free (relstart);
4353 }
4354
4355 if (locsyms != NULL
4356 && (symtab_hdr->contents != (unsigned char *) locsyms))
4357 {
4358 if (!info->keep_memory)
4359 free (locsyms);
4360 else
4361 symtab_hdr->contents = (unsigned char *) locsyms;
4362 }
4363 }
4364 return TRUE;
4365 }
4366 \f
4367 /* Hook called by the linker routine which adds symbols from an object
4368 file. We use it to put .comm items in .sbss, and not .bss. */
4369
4370 static bfd_boolean
4371 ppc_elf_add_symbol_hook (bfd *abfd,
4372 struct bfd_link_info *info,
4373 const Elf_Internal_Sym *sym,
4374 const char **namep ATTRIBUTE_UNUSED,
4375 flagword *flagsp ATTRIBUTE_UNUSED,
4376 asection **secp,
4377 bfd_vma *valp)
4378 {
4379 if (sym->st_shndx == SHN_COMMON
4380 && !info->relocatable
4381 && sym->st_size <= elf_gp_size (abfd)
4382 && (info->hash->creator == abfd->xvec
4383 || info->hash->creator == abfd->xvec->alternative_target))
4384 {
4385 /* Common symbols less than or equal to -G nn bytes are automatically
4386 put into .sbss. */
4387 struct ppc_elf_link_hash_table *htab;
4388
4389 htab = ppc_elf_hash_table (info);
4390 if (htab->sbss == NULL)
4391 {
4392 flagword flags = SEC_IS_COMMON;
4393
4394 htab->sbss = bfd_make_section_anyway (abfd, ".sbss");
4395 if (htab->sbss == NULL
4396 || ! bfd_set_section_flags (abfd, htab->sbss, flags))
4397 return FALSE;
4398 }
4399
4400 *secp = htab->sbss;
4401 *valp = sym->st_size;
4402 }
4403
4404 return TRUE;
4405 }
4406 \f
4407 /* Finish up dynamic symbol handling. We set the contents of various
4408 dynamic sections here. */
4409
4410 static bfd_boolean
4411 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
4412 struct bfd_link_info *info,
4413 struct elf_link_hash_entry *h,
4414 Elf_Internal_Sym *sym)
4415 {
4416 struct ppc_elf_link_hash_table *htab;
4417
4418 #ifdef DEBUG
4419 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
4420 h->root.root.string);
4421 #endif
4422
4423 htab = ppc_elf_hash_table (info);
4424 BFD_ASSERT (htab->elf.dynobj != NULL);
4425
4426 if (h->plt.offset != (bfd_vma) -1)
4427 {
4428 Elf_Internal_Rela rela;
4429 bfd_byte *loc;
4430 bfd_vma reloc_index;
4431
4432 #ifdef DEBUG
4433 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
4434 #endif
4435
4436 /* This symbol has an entry in the procedure linkage table. Set
4437 it up. */
4438
4439 BFD_ASSERT (h->dynindx != -1);
4440 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
4441
4442 /* We don't need to fill in the .plt. The ppc dynamic linker
4443 will fill it in. */
4444
4445 /* Fill in the entry in the .rela.plt section. */
4446 rela.r_offset = (htab->plt->output_section->vma
4447 + htab->plt->output_offset
4448 + h->plt.offset);
4449 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
4450 rela.r_addend = 0;
4451
4452 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
4453 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
4454 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
4455 loc = (htab->relplt->contents
4456 + reloc_index * sizeof (Elf32_External_Rela));
4457 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4458
4459 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4460 {
4461 /* Mark the symbol as undefined, rather than as defined in
4462 the .plt section. Leave the value alone. */
4463 sym->st_shndx = SHN_UNDEF;
4464 /* If the symbol is weak, we do need to clear the value.
4465 Otherwise, the PLT entry would provide a definition for
4466 the symbol even if the symbol wasn't defined anywhere,
4467 and so the symbol would never be NULL. */
4468 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
4469 == 0)
4470 sym->st_value = 0;
4471 }
4472 }
4473
4474 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4475 {
4476 asection *s;
4477 Elf_Internal_Rela rela;
4478 bfd_byte *loc;
4479
4480 /* This symbols needs a copy reloc. Set it up. */
4481
4482 #ifdef DEBUG
4483 fprintf (stderr, ", copy");
4484 #endif
4485
4486 BFD_ASSERT (h->dynindx != -1);
4487
4488 if (h->size <= elf_gp_size (htab->elf.dynobj))
4489 s = htab->relsbss;
4490 else
4491 s = htab->relbss;
4492 BFD_ASSERT (s != NULL);
4493
4494 rela.r_offset = (h->root.u.def.value
4495 + h->root.u.def.section->output_section->vma
4496 + h->root.u.def.section->output_offset);
4497 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
4498 rela.r_addend = 0;
4499 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4500 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4501 }
4502
4503 #ifdef DEBUG
4504 fprintf (stderr, "\n");
4505 #endif
4506
4507 /* Mark some specially defined symbols as absolute. */
4508 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4509 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
4510 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
4511 sym->st_shndx = SHN_ABS;
4512
4513 return TRUE;
4514 }
4515 \f
4516 /* Finish up the dynamic sections. */
4517
4518 static bfd_boolean
4519 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
4520 struct bfd_link_info *info)
4521 {
4522 asection *sdyn;
4523 struct ppc_elf_link_hash_table *htab;
4524
4525 #ifdef DEBUG
4526 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
4527 #endif
4528
4529 htab = ppc_elf_hash_table (info);
4530 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
4531
4532 if (htab->elf.dynamic_sections_created)
4533 {
4534 Elf32_External_Dyn *dyncon, *dynconend;
4535
4536 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
4537
4538 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4539 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4540 for (; dyncon < dynconend; dyncon++)
4541 {
4542 Elf_Internal_Dyn dyn;
4543 asection *s;
4544
4545 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
4546
4547 switch (dyn.d_tag)
4548 {
4549 case DT_PLTGOT:
4550 s = htab->plt;
4551 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4552 break;
4553
4554 case DT_PLTRELSZ:
4555 dyn.d_un.d_val = htab->relplt->_raw_size;
4556 break;
4557
4558 case DT_JMPREL:
4559 s = htab->relplt;
4560 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4561 break;
4562
4563 default:
4564 continue;
4565 }
4566
4567 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4568 }
4569 }
4570
4571 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
4572 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
4573 if (htab->got)
4574 {
4575 unsigned char *contents = htab->got->contents;
4576 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
4577
4578 if (sdyn == NULL)
4579 bfd_put_32 (output_bfd, 0, contents + 4);
4580 else
4581 bfd_put_32 (output_bfd,
4582 sdyn->output_section->vma + sdyn->output_offset,
4583 contents + 4);
4584
4585 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
4586 }
4587
4588 return TRUE;
4589 }
4590 \f
4591 /* The RELOCATE_SECTION function is called by the ELF backend linker
4592 to handle the relocations for a section.
4593
4594 The relocs are always passed as Rela structures; if the section
4595 actually uses Rel structures, the r_addend field will always be
4596 zero.
4597
4598 This function is responsible for adjust the section contents as
4599 necessary, and (if using Rela relocs and generating a
4600 relocatable output file) adjusting the reloc addend as
4601 necessary.
4602
4603 This function does not have to worry about setting the reloc
4604 address or the reloc symbol index.
4605
4606 LOCAL_SYMS is a pointer to the swapped in local symbols.
4607
4608 LOCAL_SECTIONS is an array giving the section in the input file
4609 corresponding to the st_shndx field of each local symbol.
4610
4611 The global hash table entry for the global symbols can be found
4612 via elf_sym_hashes (input_bfd).
4613
4614 When generating relocatable output, this function must handle
4615 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
4616 going to be the section symbol corresponding to the output
4617 section, which means that the addend must be adjusted
4618 accordingly. */
4619
4620 static bfd_boolean
4621 ppc_elf_relocate_section (bfd *output_bfd,
4622 struct bfd_link_info *info,
4623 bfd *input_bfd,
4624 asection *input_section,
4625 bfd_byte *contents,
4626 Elf_Internal_Rela *relocs,
4627 Elf_Internal_Sym *local_syms,
4628 asection **local_sections)
4629 {
4630 Elf_Internal_Shdr *symtab_hdr;
4631 struct elf_link_hash_entry **sym_hashes;
4632 struct ppc_elf_link_hash_table *htab;
4633 Elf_Internal_Rela *rel;
4634 Elf_Internal_Rela *relend;
4635 Elf_Internal_Rela outrel;
4636 bfd_byte *loc;
4637 asection *sreloc = NULL;
4638 bfd_vma *local_got_offsets;
4639 bfd_boolean ret = TRUE;
4640
4641 #ifdef DEBUG
4642 fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, "
4643 "%ld relocations%s\n",
4644 bfd_archive_filename (input_bfd),
4645 bfd_section_name(input_bfd, input_section),
4646 (long) input_section->reloc_count,
4647 (info->relocatable) ? " (relocatable)" : "");
4648 #endif
4649
4650 if (info->relocatable)
4651 return TRUE;
4652
4653 /* Initialize howto table if not already done. */
4654 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4655 ppc_elf_howto_init ();
4656
4657 htab = ppc_elf_hash_table (info);
4658 local_got_offsets = elf_local_got_offsets (input_bfd);
4659 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4660 sym_hashes = elf_sym_hashes (input_bfd);
4661 rel = relocs;
4662 relend = relocs + input_section->reloc_count;
4663 for (; rel < relend; rel++)
4664 {
4665 enum elf_ppc_reloc_type r_type;
4666 bfd_vma addend;
4667 bfd_reloc_status_type r;
4668 Elf_Internal_Sym *sym;
4669 asection *sec;
4670 struct elf_link_hash_entry *h;
4671 const char *sym_name;
4672 reloc_howto_type *howto;
4673 unsigned long r_symndx;
4674 bfd_vma relocation;
4675 bfd_vma branch_bit, insn, from;
4676 bfd_boolean unresolved_reloc;
4677 bfd_boolean warned;
4678 unsigned int tls_type, tls_mask, tls_gd;
4679
4680 r_type = ELF32_R_TYPE (rel->r_info);
4681 sym = NULL;
4682 sec = NULL;
4683 h = NULL;
4684 unresolved_reloc = FALSE;
4685 warned = FALSE;
4686 r_symndx = ELF32_R_SYM (rel->r_info);
4687
4688 if (r_symndx < symtab_hdr->sh_info)
4689 {
4690 sym = local_syms + r_symndx;
4691 sec = local_sections[r_symndx];
4692 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
4693
4694 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4695 }
4696 else
4697 {
4698 RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
4699 symtab_hdr, relocation, sec,
4700 unresolved_reloc, info,
4701 warned);
4702
4703 sym_name = h->root.root.string;
4704 }
4705
4706 /* TLS optimizations. Replace instruction sequences and relocs
4707 based on information we collected in tls_optimize. We edit
4708 RELOCS so that --emit-relocs will output something sensible
4709 for the final instruction stream. */
4710 tls_mask = 0;
4711 tls_gd = 0;
4712 if (IS_PPC_TLS_RELOC (r_type))
4713 {
4714 if (h != NULL)
4715 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
4716 else if (local_got_offsets != NULL)
4717 {
4718 char *lgot_masks;
4719 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
4720 tls_mask = lgot_masks[r_symndx];
4721 }
4722 }
4723
4724 /* Ensure reloc mapping code below stays sane. */
4725 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
4726 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
4727 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
4728 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
4729 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
4730 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
4731 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
4732 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
4733 abort ();
4734 switch (r_type)
4735 {
4736 default:
4737 break;
4738
4739 case R_PPC_GOT_TPREL16:
4740 case R_PPC_GOT_TPREL16_LO:
4741 if (tls_mask != 0
4742 && (tls_mask & TLS_TPREL) == 0)
4743 {
4744 bfd_vma insn;
4745 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
4746 insn &= 31 << 21;
4747 insn |= 0x3c020000; /* addis 0,2,0 */
4748 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
4749 r_type = R_PPC_TPREL16_HA;
4750 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4751 }
4752 break;
4753
4754 case R_PPC_TLS:
4755 if (tls_mask != 0
4756 && (tls_mask & TLS_TPREL) == 0)
4757 {
4758 bfd_vma insn, rtra;
4759 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4760 if ((insn & ((31 << 26) | (31 << 11)))
4761 == ((31 << 26) | (2 << 11)))
4762 rtra = insn & ((1 << 26) - (1 << 16));
4763 else if ((insn & ((31 << 26) | (31 << 16)))
4764 == ((31 << 26) | (2 << 16)))
4765 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
4766 else
4767 abort ();
4768 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
4769 /* add -> addi. */
4770 insn = 14 << 26;
4771 else if ((insn & (31 << 1)) == 23 << 1
4772 && ((insn & (31 << 6)) < 14 << 6
4773 || ((insn & (31 << 6)) >= 16 << 6
4774 && (insn & (31 << 6)) < 24 << 6)))
4775 /* load and store indexed -> dform. */
4776 insn = (32 | ((insn >> 6) & 31)) << 26;
4777 else if ((insn & (31 << 1)) == 21 << 1
4778 && (insn & (0x1a << 6)) == 0)
4779 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
4780 insn = (((58 | ((insn >> 6) & 4)) << 26)
4781 | ((insn >> 6) & 1));
4782 else if ((insn & (31 << 1)) == 21 << 1
4783 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
4784 /* lwax -> lwa. */
4785 insn = (58 << 26) | 2;
4786 else
4787 abort ();
4788 insn |= rtra;
4789 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4790 r_type = R_PPC_TPREL16_LO;
4791 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4792 /* Was PPC_TLS which sits on insn boundary, now
4793 PPC_TPREL16_LO which is at insn+2. */
4794 rel->r_offset += 2;
4795 }
4796 break;
4797
4798 case R_PPC_GOT_TLSGD16_HI:
4799 case R_PPC_GOT_TLSGD16_HA:
4800 tls_gd = TLS_TPRELGD;
4801 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4802 goto tls_gdld_hi;
4803 break;
4804
4805 case R_PPC_GOT_TLSLD16_HI:
4806 case R_PPC_GOT_TLSLD16_HA:
4807 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4808 {
4809 tls_gdld_hi:
4810 if ((tls_mask & tls_gd) != 0)
4811 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4812 + R_PPC_GOT_TPREL16);
4813 else
4814 {
4815 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
4816 rel->r_offset -= 2;
4817 r_type = R_PPC_NONE;
4818 }
4819 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4820 }
4821 break;
4822
4823 case R_PPC_GOT_TLSGD16:
4824 case R_PPC_GOT_TLSGD16_LO:
4825 tls_gd = TLS_TPRELGD;
4826 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4827 goto tls_get_addr_check;
4828 break;
4829
4830 case R_PPC_GOT_TLSLD16:
4831 case R_PPC_GOT_TLSLD16_LO:
4832 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4833 {
4834 tls_get_addr_check:
4835 if (rel + 1 < relend)
4836 {
4837 enum elf_ppc_reloc_type r_type2;
4838 unsigned long r_symndx2;
4839 struct elf_link_hash_entry *h2;
4840 bfd_vma insn1, insn2;
4841 bfd_vma offset;
4842
4843 /* The next instruction should be a call to
4844 __tls_get_addr. Peek at the reloc to be sure. */
4845 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4846 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4847 if (r_symndx2 < symtab_hdr->sh_info
4848 || (r_type2 != R_PPC_REL14
4849 && r_type2 != R_PPC_REL14_BRTAKEN
4850 && r_type2 != R_PPC_REL14_BRNTAKEN
4851 && r_type2 != R_PPC_REL24
4852 && r_type2 != R_PPC_PLTREL24))
4853 break;
4854
4855 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4856 while (h2->root.type == bfd_link_hash_indirect
4857 || h2->root.type == bfd_link_hash_warning)
4858 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
4859 if (h2 == NULL || h2 != htab->tls_get_addr)
4860 break;
4861
4862 /* OK, it checks out. Replace the call. */
4863 offset = rel[1].r_offset;
4864 insn1 = bfd_get_32 (output_bfd,
4865 contents + rel->r_offset - 2);
4866 if ((tls_mask & tls_gd) != 0)
4867 {
4868 /* IE */
4869 insn1 &= (1 << 26) - 1;
4870 insn1 |= 32 << 26; /* lwz */
4871 insn2 = 0x7c631214; /* add 3,3,2 */
4872 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
4873 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4874 + R_PPC_GOT_TPREL16);
4875 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4876 }
4877 else
4878 {
4879 /* LE */
4880 insn1 = 0x3c620000; /* addis 3,2,0 */
4881 insn2 = 0x38630000; /* addi 3,3,0 */
4882 if (tls_gd == 0)
4883 {
4884 /* Was an LD reloc. */
4885 r_symndx = 0;
4886 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4887 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4888 }
4889 r_type = R_PPC_TPREL16_HA;
4890 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4891 rel[1].r_info = ELF32_R_INFO (r_symndx,
4892 R_PPC_TPREL16_LO);
4893 rel[1].r_offset += 2;
4894 }
4895 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
4896 bfd_put_32 (output_bfd, insn2, contents + offset);
4897 if (tls_gd == 0)
4898 {
4899 /* We changed the symbol on an LD reloc. Start over
4900 in order to get h, sym, sec etc. right. */
4901 rel--;
4902 continue;
4903 }
4904 }
4905 }
4906 break;
4907 }
4908
4909 /* Handle other relocations that tweak non-addend part of insn. */
4910 branch_bit = 0;
4911 switch (r_type)
4912 {
4913 default:
4914 break;
4915
4916 /* Branch taken prediction relocations. */
4917 case R_PPC_ADDR14_BRTAKEN:
4918 case R_PPC_REL14_BRTAKEN:
4919 branch_bit = BRANCH_PREDICT_BIT;
4920 /* Fall thru */
4921
4922 /* Branch not taken predicition relocations. */
4923 case R_PPC_ADDR14_BRNTAKEN:
4924 case R_PPC_REL14_BRNTAKEN:
4925 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4926 insn &= ~BRANCH_PREDICT_BIT;
4927 insn |= branch_bit;
4928
4929 from = (rel->r_offset
4930 + input_section->output_offset
4931 + input_section->output_section->vma);
4932
4933 /* Invert 'y' bit if not the default. */
4934 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
4935 insn ^= BRANCH_PREDICT_BIT;
4936
4937 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4938 break;
4939 }
4940
4941 addend = rel->r_addend;
4942 tls_type = 0;
4943 howto = NULL;
4944 if (r_type < R_PPC_max)
4945 howto = ppc_elf_howto_table[r_type];
4946 switch (r_type)
4947 {
4948 default:
4949 (*_bfd_error_handler)
4950 (_("%s: unknown relocation type %d for symbol %s"),
4951 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
4952
4953 bfd_set_error (bfd_error_bad_value);
4954 ret = FALSE;
4955 continue;
4956
4957 case R_PPC_NONE:
4958 case R_PPC_TLS:
4959 case R_PPC_EMB_MRKREF:
4960 case R_PPC_GNU_VTINHERIT:
4961 case R_PPC_GNU_VTENTRY:
4962 continue;
4963
4964 /* GOT16 relocations. Like an ADDR16 using the symbol's
4965 address in the GOT as relocation value instead of the
4966 symbol's value itself. Also, create a GOT entry for the
4967 symbol and put the symbol value there. */
4968 case R_PPC_GOT_TLSGD16:
4969 case R_PPC_GOT_TLSGD16_LO:
4970 case R_PPC_GOT_TLSGD16_HI:
4971 case R_PPC_GOT_TLSGD16_HA:
4972 tls_type = TLS_TLS | TLS_GD;
4973 goto dogot;
4974
4975 case R_PPC_GOT_TLSLD16:
4976 case R_PPC_GOT_TLSLD16_LO:
4977 case R_PPC_GOT_TLSLD16_HI:
4978 case R_PPC_GOT_TLSLD16_HA:
4979 tls_type = TLS_TLS | TLS_LD;
4980 goto dogot;
4981
4982 case R_PPC_GOT_TPREL16:
4983 case R_PPC_GOT_TPREL16_LO:
4984 case R_PPC_GOT_TPREL16_HI:
4985 case R_PPC_GOT_TPREL16_HA:
4986 tls_type = TLS_TLS | TLS_TPREL;
4987 goto dogot;
4988
4989 case R_PPC_GOT_DTPREL16:
4990 case R_PPC_GOT_DTPREL16_LO:
4991 case R_PPC_GOT_DTPREL16_HI:
4992 case R_PPC_GOT_DTPREL16_HA:
4993 tls_type = TLS_TLS | TLS_DTPREL;
4994 goto dogot;
4995
4996 case R_PPC_GOT16:
4997 case R_PPC_GOT16_LO:
4998 case R_PPC_GOT16_HI:
4999 case R_PPC_GOT16_HA:
5000 dogot:
5001 {
5002 /* Relocation is to the entry for this symbol in the global
5003 offset table. */
5004 bfd_vma off;
5005 bfd_vma *offp;
5006 unsigned long indx;
5007
5008 if (htab->got == NULL)
5009 abort ();
5010
5011 indx = 0;
5012 if (tls_type == (TLS_TLS | TLS_LD)
5013 && (h == NULL
5014 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
5015 offp = &htab->tlsld_got.offset;
5016 else if (h != NULL)
5017 {
5018 bfd_boolean dyn;
5019 dyn = htab->elf.dynamic_sections_created;
5020 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5021 || (info->shared
5022 && SYMBOL_REFERENCES_LOCAL (info, h)))
5023 /* This is actually a static link, or it is a
5024 -Bsymbolic link and the symbol is defined
5025 locally, or the symbol was forced to be local
5026 because of a version file. */
5027 ;
5028 else
5029 {
5030 indx = h->dynindx;
5031 unresolved_reloc = FALSE;
5032 }
5033 offp = &h->got.offset;
5034 }
5035 else
5036 {
5037 if (local_got_offsets == NULL)
5038 abort ();
5039 offp = &local_got_offsets[r_symndx];
5040 }
5041
5042 /* The offset must always be a multiple of 4. We use the
5043 least significant bit to record whether we have already
5044 processed this entry. */
5045 off = *offp;
5046 if ((off & 1) != 0)
5047 off &= ~1;
5048 else
5049 {
5050 unsigned int tls_m = (tls_mask
5051 & (TLS_LD | TLS_GD | TLS_DTPREL
5052 | TLS_TPREL | TLS_TPRELGD));
5053
5054 if (offp == &htab->tlsld_got.offset)
5055 tls_m = TLS_LD;
5056 else if (h == NULL
5057 || !(h->elf_link_hash_flags
5058 & ELF_LINK_HASH_DEF_DYNAMIC))
5059 tls_m &= ~TLS_LD;
5060
5061 /* We might have multiple got entries for this sym.
5062 Initialize them all. */
5063 do
5064 {
5065 int tls_ty = 0;
5066
5067 if ((tls_m & TLS_LD) != 0)
5068 {
5069 tls_ty = TLS_TLS | TLS_LD;
5070 tls_m &= ~TLS_LD;
5071 }
5072 else if ((tls_m & TLS_GD) != 0)
5073 {
5074 tls_ty = TLS_TLS | TLS_GD;
5075 tls_m &= ~TLS_GD;
5076 }
5077 else if ((tls_m & TLS_DTPREL) != 0)
5078 {
5079 tls_ty = TLS_TLS | TLS_DTPREL;
5080 tls_m &= ~TLS_DTPREL;
5081 }
5082 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5083 {
5084 tls_ty = TLS_TLS | TLS_TPREL;
5085 tls_m = 0;
5086 }
5087
5088 /* Generate relocs for the dynamic linker. */
5089 if ((info->shared || indx != 0)
5090 && (h == NULL
5091 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5092 || h->root.type != bfd_link_hash_undefweak))
5093 {
5094 outrel.r_offset = (htab->got->output_section->vma
5095 + htab->got->output_offset
5096 + off);
5097 outrel.r_addend = 0;
5098 if (tls_ty & (TLS_LD | TLS_GD))
5099 {
5100 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5101 if (tls_ty == (TLS_TLS | TLS_GD))
5102 {
5103 loc = htab->relgot->contents;
5104 loc += (htab->relgot->reloc_count++
5105 * sizeof (Elf32_External_Rela));
5106 bfd_elf32_swap_reloca_out (output_bfd,
5107 &outrel, loc);
5108 outrel.r_offset += 4;
5109 outrel.r_info
5110 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5111 }
5112 }
5113 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5114 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5115 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5116 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5117 else if (indx == 0)
5118 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5119 else
5120 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5121 if (indx == 0)
5122 {
5123 outrel.r_addend += relocation;
5124 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5125 outrel.r_addend -= htab->elf.tls_sec->vma;
5126 }
5127 loc = htab->relgot->contents;
5128 loc += (htab->relgot->reloc_count++
5129 * sizeof (Elf32_External_Rela));
5130 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5131 }
5132
5133 /* Init the .got section contents if we're not
5134 emitting a reloc. */
5135 else
5136 {
5137 bfd_vma value = relocation;
5138
5139 if (tls_ty == (TLS_TLS | TLS_LD))
5140 value = 1;
5141 else if (tls_ty != 0)
5142 {
5143 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
5144 if (tls_ty == (TLS_TLS | TLS_TPREL))
5145 value += DTP_OFFSET - TP_OFFSET;
5146
5147 if (tls_ty == (TLS_TLS | TLS_GD))
5148 {
5149 bfd_put_32 (output_bfd, value,
5150 htab->got->contents + off + 4);
5151 value = 1;
5152 }
5153 }
5154 bfd_put_32 (output_bfd, value,
5155 htab->got->contents + off);
5156 }
5157
5158 off += 4;
5159 if (tls_ty & (TLS_LD | TLS_GD))
5160 off += 4;
5161 }
5162 while (tls_m != 0);
5163
5164 off = *offp;
5165 *offp = off | 1;
5166 }
5167
5168 if (off >= (bfd_vma) -2)
5169 abort ();
5170
5171 if ((tls_type & TLS_TLS) != 0)
5172 {
5173 if (tls_type != (TLS_TLS | TLS_LD))
5174 {
5175 if ((tls_mask & TLS_LD) != 0
5176 && !(h == NULL
5177 || !(h->elf_link_hash_flags
5178 & ELF_LINK_HASH_DEF_DYNAMIC)))
5179 off += 8;
5180 if (tls_type != (TLS_TLS | TLS_GD))
5181 {
5182 if ((tls_mask & TLS_GD) != 0)
5183 off += 8;
5184 if (tls_type != (TLS_TLS | TLS_DTPREL))
5185 {
5186 if ((tls_mask & TLS_DTPREL) != 0)
5187 off += 4;
5188 }
5189 }
5190 }
5191 }
5192
5193 relocation = htab->got->output_offset + off - 4;
5194
5195 /* Addends on got relocations don't make much sense.
5196 x+off@got is actually x@got+off, and since the got is
5197 generated by a hash table traversal, the value in the
5198 got at entry m+n bears little relation to the entry m. */
5199 if (addend != 0)
5200 (*_bfd_error_handler)
5201 (_("%s(%s+0x%lx): non-zero addend on %s reloc against `%s'"),
5202 bfd_archive_filename (input_bfd),
5203 bfd_get_section_name (input_bfd, input_section),
5204 (long) rel->r_offset,
5205 howto->name,
5206 sym_name);
5207 }
5208 break;
5209
5210 /* Relocations that need no special processing. */
5211 case R_PPC_LOCAL24PC:
5212 /* It makes no sense to point a local relocation
5213 at a symbol not in this object. */
5214 if (unresolved_reloc)
5215 {
5216 if (! (*info->callbacks->undefined_symbol) (info,
5217 h->root.root.string,
5218 input_bfd,
5219 input_section,
5220 rel->r_offset,
5221 TRUE))
5222 return FALSE;
5223 continue;
5224 }
5225 break;
5226
5227 case R_PPC_DTPREL16:
5228 case R_PPC_DTPREL16_LO:
5229 case R_PPC_DTPREL16_HI:
5230 case R_PPC_DTPREL16_HA:
5231 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5232 break;
5233
5234 /* Relocations that may need to be propagated if this is a shared
5235 object. */
5236 case R_PPC_TPREL16:
5237 case R_PPC_TPREL16_LO:
5238 case R_PPC_TPREL16_HI:
5239 case R_PPC_TPREL16_HA:
5240 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5241 /* The TPREL16 relocs shouldn't really be used in shared
5242 libs as they will result in DT_TEXTREL being set, but
5243 support them anyway. */
5244 goto dodyn;
5245
5246 case R_PPC_TPREL32:
5247 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5248 goto dodyn;
5249
5250 case R_PPC_DTPREL32:
5251 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5252 goto dodyn;
5253
5254 case R_PPC_DTPMOD32:
5255 relocation = 1;
5256 addend = 0;
5257 goto dodyn;
5258
5259 case R_PPC_REL24:
5260 case R_PPC_REL32:
5261 case R_PPC_REL14:
5262 case R_PPC_REL14_BRTAKEN:
5263 case R_PPC_REL14_BRNTAKEN:
5264 /* If these relocations are not to a named symbol, they can be
5265 handled right here, no need to bother the dynamic linker. */
5266 if (SYMBOL_REFERENCES_LOCAL (info, h)
5267 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5268 break;
5269 /* fall through */
5270
5271 /* Relocations that always need to be propagated if this is a shared
5272 object. */
5273 case R_PPC_ADDR32:
5274 case R_PPC_ADDR24:
5275 case R_PPC_ADDR16:
5276 case R_PPC_ADDR16_LO:
5277 case R_PPC_ADDR16_HI:
5278 case R_PPC_ADDR16_HA:
5279 case R_PPC_ADDR14:
5280 case R_PPC_ADDR14_BRTAKEN:
5281 case R_PPC_ADDR14_BRNTAKEN:
5282 case R_PPC_UADDR32:
5283 case R_PPC_UADDR16:
5284 /* r_symndx will be zero only for relocs against symbols
5285 from removed linkonce sections, or sections discarded by
5286 a linker script. */
5287 dodyn:
5288 if (r_symndx == 0)
5289 break;
5290 /* Fall thru. */
5291
5292 if ((info->shared
5293 && (h == NULL
5294 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5295 || h->root.type != bfd_link_hash_undefweak)
5296 && (MUST_BE_DYN_RELOC (r_type)
5297 || !SYMBOL_CALLS_LOCAL (info, h)))
5298 || (ELIMINATE_COPY_RELOCS
5299 && !info->shared
5300 && (input_section->flags & SEC_ALLOC) != 0
5301 && h != NULL
5302 && h->dynindx != -1
5303 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5304 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5305 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
5306 {
5307 int skip;
5308
5309 #ifdef DEBUG
5310 fprintf (stderr, "ppc_elf_relocate_section needs to "
5311 "create relocation for %s\n",
5312 (h && h->root.root.string
5313 ? h->root.root.string : "<unknown>"));
5314 #endif
5315
5316 /* When generating a shared object, these relocations
5317 are copied into the output file to be resolved at run
5318 time. */
5319 if (sreloc == NULL)
5320 {
5321 const char *name;
5322
5323 name = (bfd_elf_string_from_elf_section
5324 (input_bfd,
5325 elf_elfheader (input_bfd)->e_shstrndx,
5326 elf_section_data (input_section)->rel_hdr.sh_name));
5327 if (name == NULL)
5328 return FALSE;
5329
5330 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
5331 && strcmp (bfd_get_section_name (input_bfd,
5332 input_section),
5333 name + 5) == 0);
5334
5335 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
5336 BFD_ASSERT (sreloc != NULL);
5337 }
5338
5339 skip = 0;
5340
5341 outrel.r_offset =
5342 _bfd_elf_section_offset (output_bfd, info, input_section,
5343 rel->r_offset);
5344 if (outrel.r_offset == (bfd_vma) -1
5345 || outrel.r_offset == (bfd_vma) -2)
5346 skip = (int) outrel.r_offset;
5347 outrel.r_offset += (input_section->output_section->vma
5348 + input_section->output_offset);
5349
5350 if (skip)
5351 memset (&outrel, 0, sizeof outrel);
5352 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
5353 {
5354 unresolved_reloc = FALSE;
5355 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5356 outrel.r_addend = rel->r_addend;
5357 }
5358 else
5359 {
5360 outrel.r_addend = relocation + rel->r_addend;
5361
5362 if (r_type == R_PPC_ADDR32)
5363 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
5364 else
5365 {
5366 long indx;
5367
5368 if (bfd_is_abs_section (sec))
5369 indx = 0;
5370 else if (sec == NULL || sec->owner == NULL)
5371 {
5372 bfd_set_error (bfd_error_bad_value);
5373 return FALSE;
5374 }
5375 else
5376 {
5377 asection *osec;
5378
5379 /* We are turning this relocation into one
5380 against a section symbol. It would be
5381 proper to subtract the symbol's value,
5382 osec->vma, from the emitted reloc addend,
5383 but ld.so expects buggy relocs. */
5384 osec = sec->output_section;
5385 indx = elf_section_data (osec)->dynindx;
5386 BFD_ASSERT (indx > 0);
5387 #ifdef DEBUG
5388 if (indx <= 0)
5389 printf ("indx=%d section=%s flags=%08x name=%s\n",
5390 indx, osec->name, osec->flags,
5391 h->root.root.string);
5392 #endif
5393 }
5394
5395 outrel.r_info = ELF32_R_INFO (indx, r_type);
5396 }
5397 }
5398
5399 loc = sreloc->contents;
5400 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5401 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5402
5403 if (skip == -1)
5404 continue;
5405
5406 /* This reloc will be computed at runtime. We clear the memory
5407 so that it contains predictable value. */
5408 if (! skip
5409 && ((input_section->flags & SEC_ALLOC) != 0
5410 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
5411 {
5412 relocation = howto->pc_relative ? outrel.r_offset : 0;
5413 addend = 0;
5414 break;
5415 }
5416 }
5417 break;
5418
5419 case R_PPC_RELAX32PC:
5420 relocation -= (input_section->output_section->vma
5421 + input_section->output_offset
5422 + rel->r_offset - 4);
5423 /* Fall thru */
5424 case R_PPC_RELAX32:
5425 {
5426 unsigned long t0;
5427 unsigned long t1;
5428
5429 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
5430 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
5431
5432 /* We're clearing the bits for R_PPC_ADDR16_HA
5433 and R_PPC_ADDR16_LO here. */
5434 t0 &= ~0xffff;
5435 t1 &= ~0xffff;
5436
5437 /* t0 is HA, t1 is LO */
5438 relocation += addend;
5439 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
5440 t1 |= relocation & 0xffff;
5441
5442 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
5443 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
5444 }
5445 continue;
5446
5447 /* Indirect .sdata relocation. */
5448 case R_PPC_EMB_SDAI16:
5449 BFD_ASSERT (htab->sdata != NULL);
5450 relocation
5451 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5452 htab->sdata, h, relocation,
5453 rel, R_PPC_RELATIVE);
5454 break;
5455
5456 /* Indirect .sdata2 relocation. */
5457 case R_PPC_EMB_SDA2I16:
5458 BFD_ASSERT (htab->sdata2 != NULL);
5459 relocation
5460 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5461 htab->sdata2, h, relocation,
5462 rel, R_PPC_RELATIVE);
5463 break;
5464
5465 /* Handle the TOC16 reloc. We want to use the offset within the .got
5466 section, not the actual VMA. This is appropriate when generating
5467 an embedded ELF object, for which the .got section acts like the
5468 AIX .toc section. */
5469 case R_PPC_TOC16: /* phony GOT16 relocations */
5470 BFD_ASSERT (sec != NULL);
5471 BFD_ASSERT (bfd_is_und_section (sec)
5472 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
5473 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)
5474
5475 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
5476 break;
5477
5478 case R_PPC_PLTREL24:
5479 /* Relocation is to the entry for this symbol in the
5480 procedure linkage table. */
5481 BFD_ASSERT (h != NULL);
5482
5483 if (h->plt.offset == (bfd_vma) -1
5484 || htab->plt == NULL)
5485 {
5486 /* We didn't make a PLT entry for this symbol. This
5487 happens when statically linking PIC code, or when
5488 using -Bsymbolic. */
5489 break;
5490 }
5491
5492 unresolved_reloc = FALSE;
5493 relocation = (htab->plt->output_section->vma
5494 + htab->plt->output_offset
5495 + h->plt.offset);
5496 break;
5497
5498 /* Relocate against _SDA_BASE_. */
5499 case R_PPC_SDAREL16:
5500 {
5501 const char *name;
5502 const struct elf_link_hash_entry *sh;
5503
5504 BFD_ASSERT (sec != NULL);
5505 name = bfd_get_section_name (abfd, sec->output_section);
5506 if (! ((strncmp (name, ".sdata", 6) == 0
5507 && (name[6] == 0 || name[6] == '.'))
5508 || (strncmp (name, ".sbss", 5) == 0
5509 && (name[5] == 0 || name[5] == '.'))))
5510 {
5511 (*_bfd_error_handler)
5512 (_("%s: the target (%s) of a %s relocation is "
5513 "in the wrong output section (%s)"),
5514 bfd_archive_filename (input_bfd),
5515 sym_name,
5516 howto->name,
5517 name);
5518 }
5519 sh = htab->sdata->sym_hash;
5520 addend -= (sh->root.u.def.value
5521 + sh->root.u.def.section->output_section->vma
5522 + sh->root.u.def.section->output_offset);
5523 }
5524 break;
5525
5526 /* Relocate against _SDA2_BASE_. */
5527 case R_PPC_EMB_SDA2REL:
5528 {
5529 const char *name;
5530 const struct elf_link_hash_entry *sh;
5531
5532 BFD_ASSERT (sec != NULL);
5533 name = bfd_get_section_name (abfd, sec->output_section);
5534 if (! (strncmp (name, ".sdata2", 7) == 0
5535 || strncmp (name, ".sbss2", 6) == 0))
5536 {
5537 (*_bfd_error_handler)
5538 (_("%s: the target (%s) of a %s relocation is "
5539 "in the wrong output section (%s)"),
5540 bfd_archive_filename (input_bfd),
5541 sym_name,
5542 howto->name,
5543 name);
5544
5545 bfd_set_error (bfd_error_bad_value);
5546 ret = FALSE;
5547 continue;
5548 }
5549 sh = htab->sdata2->sym_hash;
5550 addend -= (sh->root.u.def.value
5551 + sh->root.u.def.section->output_section->vma
5552 + sh->root.u.def.section->output_offset);
5553 }
5554 break;
5555
5556 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
5557 case R_PPC_EMB_SDA21:
5558 case R_PPC_EMB_RELSDA:
5559 {
5560 const char *name;
5561 const struct elf_link_hash_entry *sh;
5562 int reg;
5563
5564 BFD_ASSERT (sec != NULL);
5565 name = bfd_get_section_name (abfd, sec->output_section);
5566 if (((strncmp (name, ".sdata", 6) == 0
5567 && (name[6] == 0 || name[6] == '.'))
5568 || (strncmp (name, ".sbss", 5) == 0
5569 && (name[5] == 0 || name[5] == '.'))))
5570 {
5571 reg = 13;
5572 sh = htab->sdata->sym_hash;
5573 addend -= (sh->root.u.def.value
5574 + sh->root.u.def.section->output_section->vma
5575 + sh->root.u.def.section->output_offset);
5576 }
5577
5578 else if (strncmp (name, ".sdata2", 7) == 0
5579 || strncmp (name, ".sbss2", 6) == 0)
5580 {
5581 reg = 2;
5582 sh = htab->sdata2->sym_hash;
5583 addend -= (sh->root.u.def.value
5584 + sh->root.u.def.section->output_section->vma
5585 + sh->root.u.def.section->output_offset);
5586 }
5587
5588 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
5589 || strcmp (name, ".PPC.EMB.sbss0") == 0)
5590 {
5591 reg = 0;
5592 }
5593
5594 else
5595 {
5596 (*_bfd_error_handler)
5597 (_("%s: the target (%s) of a %s relocation is "
5598 "in the wrong output section (%s)"),
5599 bfd_archive_filename (input_bfd),
5600 sym_name,
5601 howto->name,
5602 name);
5603
5604 bfd_set_error (bfd_error_bad_value);
5605 ret = FALSE;
5606 continue;
5607 }
5608
5609 if (r_type == R_PPC_EMB_SDA21)
5610 { /* fill in register field */
5611 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5612 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
5613 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5614 }
5615 }
5616 break;
5617
5618 /* Relocate against the beginning of the section. */
5619 case R_PPC_SECTOFF:
5620 case R_PPC_SECTOFF_LO:
5621 case R_PPC_SECTOFF_HI:
5622 case R_PPC_SECTOFF_HA:
5623 BFD_ASSERT (sec != NULL);
5624 addend -= sec->output_section->vma;
5625 break;
5626
5627 /* Negative relocations. */
5628 case R_PPC_EMB_NADDR32:
5629 case R_PPC_EMB_NADDR16:
5630 case R_PPC_EMB_NADDR16_LO:
5631 case R_PPC_EMB_NADDR16_HI:
5632 case R_PPC_EMB_NADDR16_HA:
5633 addend -= 2 * relocation;
5634 break;
5635
5636 case R_PPC_COPY:
5637 case R_PPC_GLOB_DAT:
5638 case R_PPC_JMP_SLOT:
5639 case R_PPC_RELATIVE:
5640 case R_PPC_PLT32:
5641 case R_PPC_PLTREL32:
5642 case R_PPC_PLT16_LO:
5643 case R_PPC_PLT16_HI:
5644 case R_PPC_PLT16_HA:
5645 case R_PPC_ADDR30:
5646 case R_PPC_EMB_RELSEC16:
5647 case R_PPC_EMB_RELST_LO:
5648 case R_PPC_EMB_RELST_HI:
5649 case R_PPC_EMB_RELST_HA:
5650 case R_PPC_EMB_BIT_FLD:
5651 (*_bfd_error_handler)
5652 (_("%s: relocation %s is not yet supported for symbol %s."),
5653 bfd_archive_filename (input_bfd),
5654 howto->name,
5655 sym_name);
5656
5657 bfd_set_error (bfd_error_invalid_operation);
5658 ret = FALSE;
5659 continue;
5660 }
5661
5662 /* Do any further special processing. */
5663 switch (r_type)
5664 {
5665 default:
5666 break;
5667
5668 case R_PPC_ADDR16_HA:
5669 case R_PPC_GOT16_HA:
5670 case R_PPC_PLT16_HA:
5671 case R_PPC_SECTOFF_HA:
5672 case R_PPC_TPREL16_HA:
5673 case R_PPC_DTPREL16_HA:
5674 case R_PPC_GOT_TLSGD16_HA:
5675 case R_PPC_GOT_TLSLD16_HA:
5676 case R_PPC_GOT_TPREL16_HA:
5677 case R_PPC_GOT_DTPREL16_HA:
5678 case R_PPC_EMB_NADDR16_HA:
5679 case R_PPC_EMB_RELST_HA:
5680 /* It's just possible that this symbol is a weak symbol
5681 that's not actually defined anywhere. In that case,
5682 'sec' would be NULL, and we should leave the symbol
5683 alone (it will be set to zero elsewhere in the link). */
5684 if (sec != NULL)
5685 /* Add 0x10000 if sign bit in 0:15 is set.
5686 Bits 0:15 are not used. */
5687 addend += 0x8000;
5688 break;
5689 }
5690
5691 #ifdef DEBUG
5692 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
5693 "offset = %ld, addend = %ld\n",
5694 howto->name,
5695 (int) r_type,
5696 sym_name,
5697 r_symndx,
5698 (long) rel->r_offset,
5699 (long) addend);
5700 #endif
5701
5702 if (unresolved_reloc
5703 && !((input_section->flags & SEC_DEBUGGING) != 0
5704 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
5705 {
5706 (*_bfd_error_handler)
5707 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
5708 bfd_archive_filename (input_bfd),
5709 bfd_get_section_name (input_bfd, input_section),
5710 (long) rel->r_offset,
5711 howto->name,
5712 sym_name);
5713 ret = FALSE;
5714 }
5715
5716 r = _bfd_final_link_relocate (howto,
5717 input_bfd,
5718 input_section,
5719 contents,
5720 rel->r_offset,
5721 relocation,
5722 addend);
5723
5724 if (r != bfd_reloc_ok)
5725 {
5726 if (sym_name == NULL)
5727 sym_name = "(null)";
5728 if (r == bfd_reloc_overflow)
5729 {
5730 if (warned)
5731 continue;
5732 if (h != NULL
5733 && h->root.type == bfd_link_hash_undefweak
5734 && howto->pc_relative)
5735 {
5736 /* Assume this is a call protected by other code that
5737 detect the symbol is undefined. If this is the case,
5738 we can safely ignore the overflow. If not, the
5739 program is hosed anyway, and a little warning isn't
5740 going to help. */
5741
5742 continue;
5743 }
5744
5745 if (! (*info->callbacks->reloc_overflow) (info,
5746 sym_name,
5747 howto->name,
5748 rel->r_addend,
5749 input_bfd,
5750 input_section,
5751 rel->r_offset))
5752 return FALSE;
5753 }
5754 else
5755 {
5756 (*_bfd_error_handler)
5757 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
5758 bfd_archive_filename (input_bfd),
5759 bfd_get_section_name (input_bfd, input_section),
5760 (long) rel->r_offset, howto->name, sym_name, (int) r);
5761 ret = FALSE;
5762 }
5763 }
5764 }
5765
5766 #ifdef DEBUG
5767 fprintf (stderr, "\n");
5768 #endif
5769
5770 return ret;
5771 }
5772
5773 static enum elf_reloc_type_class
5774 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
5775 {
5776 switch (ELF32_R_TYPE (rela->r_info))
5777 {
5778 case R_PPC_RELATIVE:
5779 return reloc_class_relative;
5780 case R_PPC_REL24:
5781 case R_PPC_ADDR24:
5782 case R_PPC_JMP_SLOT:
5783 return reloc_class_plt;
5784 case R_PPC_COPY:
5785 return reloc_class_copy;
5786 default:
5787 return reloc_class_normal;
5788 }
5789 }
5790 \f
5791 /* Support for core dump NOTE sections. */
5792
5793 static bfd_boolean
5794 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
5795 {
5796 int offset;
5797 unsigned int raw_size;
5798
5799 switch (note->descsz)
5800 {
5801 default:
5802 return FALSE;
5803
5804 case 268: /* Linux/PPC. */
5805 /* pr_cursig */
5806 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
5807
5808 /* pr_pid */
5809 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
5810
5811 /* pr_reg */
5812 offset = 72;
5813 raw_size = 192;
5814
5815 break;
5816 }
5817
5818 /* Make a ".reg/999" section. */
5819 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
5820 raw_size, note->descpos + offset);
5821 }
5822
5823 static bfd_boolean
5824 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
5825 {
5826 switch (note->descsz)
5827 {
5828 default:
5829 return FALSE;
5830
5831 case 128: /* Linux/PPC elf_prpsinfo. */
5832 elf_tdata (abfd)->core_program
5833 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
5834 elf_tdata (abfd)->core_command
5835 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
5836 }
5837
5838 /* Note that for some reason, a spurious space is tacked
5839 onto the end of the args in some (at least one anyway)
5840 implementations, so strip it off if it exists. */
5841
5842 {
5843 char *command = elf_tdata (abfd)->core_command;
5844 int n = strlen (command);
5845
5846 if (0 < n && command[n - 1] == ' ')
5847 command[n - 1] = '\0';
5848 }
5849
5850 return TRUE;
5851 }
5852 \f
5853 /* Very simple linked list structure for recording apuinfo values. */
5854 typedef struct apuinfo_list
5855 {
5856 struct apuinfo_list *next;
5857 unsigned long value;
5858 }
5859 apuinfo_list;
5860
5861 static apuinfo_list *head;
5862
5863
5864 static void
5865 apuinfo_list_init (void)
5866 {
5867 head = NULL;
5868 }
5869
5870 static void
5871 apuinfo_list_add (unsigned long value)
5872 {
5873 apuinfo_list *entry = head;
5874
5875 while (entry != NULL)
5876 {
5877 if (entry->value == value)
5878 return;
5879 entry = entry->next;
5880 }
5881
5882 entry = bfd_malloc (sizeof (* entry));
5883 if (entry == NULL)
5884 return;
5885
5886 entry->value = value;
5887 entry->next = head;
5888 head = entry;
5889 }
5890
5891 static unsigned
5892 apuinfo_list_length (void)
5893 {
5894 apuinfo_list *entry;
5895 unsigned long count;
5896
5897 for (entry = head, count = 0;
5898 entry;
5899 entry = entry->next)
5900 ++ count;
5901
5902 return count;
5903 }
5904
5905 static inline unsigned long
5906 apuinfo_list_element (unsigned long number)
5907 {
5908 apuinfo_list * entry;
5909
5910 for (entry = head;
5911 entry && number --;
5912 entry = entry->next)
5913 ;
5914
5915 return entry ? entry->value : 0;
5916 }
5917
5918 static void
5919 apuinfo_list_finish (void)
5920 {
5921 apuinfo_list *entry;
5922
5923 for (entry = head; entry;)
5924 {
5925 apuinfo_list *next = entry->next;
5926 free (entry);
5927 entry = next;
5928 }
5929
5930 head = NULL;
5931 }
5932
5933 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
5934 #define APUINFO_LABEL "APUinfo"
5935
5936 /* Scan the input BFDs and create a linked list of
5937 the APUinfo values that will need to be emitted. */
5938
5939 static void
5940 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
5941 {
5942 bfd *ibfd;
5943 asection *asec;
5944 char *buffer;
5945 unsigned num_input_sections;
5946 bfd_size_type output_section_size;
5947 unsigned i;
5948 unsigned num_entries;
5949 unsigned long offset;
5950 unsigned long length;
5951 const char *error_message = NULL;
5952
5953 if (link_info == NULL)
5954 return;
5955
5956 /* Scan the input bfds, looking for apuinfo sections. */
5957 num_input_sections = 0;
5958 output_section_size = 0;
5959
5960 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5961 {
5962 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
5963 if (asec)
5964 {
5965 ++ num_input_sections;
5966 output_section_size += asec->_raw_size;
5967 }
5968 }
5969
5970 /* We need at least one input sections
5971 in order to make merging worthwhile. */
5972 if (num_input_sections < 1)
5973 return;
5974
5975 /* Just make sure that the output section exists as well. */
5976 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
5977 if (asec == NULL)
5978 return;
5979
5980 /* Allocate a buffer for the contents of the input sections. */
5981 buffer = bfd_malloc (output_section_size);
5982 if (buffer == NULL)
5983 return;
5984
5985 offset = 0;
5986 apuinfo_list_init ();
5987
5988 /* Read in the input sections contents. */
5989 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5990 {
5991 unsigned long datum;
5992 char *ptr;
5993
5994 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
5995 if (asec == NULL)
5996 continue;
5997
5998 length = asec->_raw_size;
5999 if (length < 24)
6000 {
6001 error_message = _("corrupt or empty %s section in %s");
6002 goto fail;
6003 }
6004
6005 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
6006 || (bfd_bread (buffer + offset, length, ibfd) != length))
6007 {
6008 error_message = _("unable to read in %s section from %s");
6009 goto fail;
6010 }
6011
6012 /* Process the contents of the section. */
6013 ptr = buffer + offset;
6014 error_message = _("corrupt %s section in %s");
6015
6016 /* Verify the contents of the header. Note - we have to
6017 extract the values this way in order to allow for a
6018 host whose endian-ness is different from the target. */
6019 datum = bfd_get_32 (ibfd, ptr);
6020 if (datum != sizeof APUINFO_LABEL)
6021 goto fail;
6022
6023 datum = bfd_get_32 (ibfd, ptr + 8);
6024 if (datum != 0x2)
6025 goto fail;
6026
6027 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
6028 goto fail;
6029
6030 /* Get the number of bytes used for apuinfo entries. */
6031 datum = bfd_get_32 (ibfd, ptr + 4);
6032 if (datum + 20 != length)
6033 goto fail;
6034
6035 /* Make sure that we do not run off the end of the section. */
6036 if (offset + length > output_section_size)
6037 goto fail;
6038
6039 /* Scan the apuinfo section, building a list of apuinfo numbers. */
6040 for (i = 0; i < datum; i += 4)
6041 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
6042
6043 /* Update the offset. */
6044 offset += length;
6045 }
6046
6047 error_message = NULL;
6048
6049 /* Compute the size of the output section. */
6050 num_entries = apuinfo_list_length ();
6051 output_section_size = 20 + num_entries * 4;
6052
6053 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6054
6055 if (! bfd_set_section_size (abfd, asec, output_section_size))
6056 ibfd = abfd,
6057 error_message = _("warning: unable to set size of %s section in %s");
6058
6059 fail:
6060 free (buffer);
6061
6062 if (error_message)
6063 (*_bfd_error_handler) (error_message, APUINFO_SECTION_NAME,
6064 bfd_archive_filename (ibfd));
6065 }
6066
6067
6068 /* Prevent the output section from accumulating the input sections'
6069 contents. We have already stored this in our linked list structure. */
6070
6071 static bfd_boolean
6072 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
6073 asection *asec,
6074 bfd_byte *contents ATTRIBUTE_UNUSED)
6075 {
6076 return (apuinfo_list_length ()
6077 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
6078 }
6079
6080
6081 /* Finally we can generate the output section. */
6082
6083 static void
6084 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
6085 {
6086 bfd_byte *buffer;
6087 asection *asec;
6088 unsigned i;
6089 unsigned num_entries;
6090 bfd_size_type length;
6091
6092 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6093 if (asec == NULL)
6094 return;
6095
6096 if (apuinfo_list_length () == 0)
6097 return;
6098
6099 length = asec->_raw_size;
6100 if (length < 20)
6101 return;
6102
6103 buffer = bfd_malloc (length);
6104 if (buffer == NULL)
6105 {
6106 (*_bfd_error_handler)
6107 (_("failed to allocate space for new APUinfo section."));
6108 return;
6109 }
6110
6111 /* Create the apuinfo header. */
6112 num_entries = apuinfo_list_length ();
6113 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
6114 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
6115 bfd_put_32 (abfd, 0x2, buffer + 8);
6116 strcpy (buffer + 12, APUINFO_LABEL);
6117
6118 length = 20;
6119 for (i = 0; i < num_entries; i++)
6120 {
6121 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
6122 length += 4;
6123 }
6124
6125 if (length != asec->_raw_size)
6126 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
6127
6128 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
6129 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
6130
6131 free (buffer);
6132
6133 apuinfo_list_finish ();
6134 }
6135
6136 /* Add extra PPC sections -- Note, for now, make .sbss2 and
6137 .PPC.EMB.sbss0 a normal section, and not a bss section so
6138 that the linker doesn't crater when trying to make more than
6139 2 sections. */
6140
6141 static struct bfd_elf_special_section const ppc_elf_special_sections[]=
6142 {
6143 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
6144 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
6145 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
6146 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
6147 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
6148 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
6149 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
6150 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
6151 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
6152 { NULL, 0, 0, 0, 0 }
6153 };
6154 \f
6155 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
6156 #define TARGET_LITTLE_NAME "elf32-powerpcle"
6157 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
6158 #define TARGET_BIG_NAME "elf32-powerpc"
6159 #define ELF_ARCH bfd_arch_powerpc
6160 #define ELF_MACHINE_CODE EM_PPC
6161 #ifdef __QNXTARGET__
6162 #define ELF_MAXPAGESIZE 0x1000
6163 #else
6164 #define ELF_MAXPAGESIZE 0x10000
6165 #endif
6166 #define elf_info_to_howto ppc_elf_info_to_howto
6167
6168 #ifdef EM_CYGNUS_POWERPC
6169 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6170 #endif
6171
6172 #ifdef EM_PPC_OLD
6173 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6174 #endif
6175
6176 #define elf_backend_plt_not_loaded 1
6177 #define elf_backend_got_symbol_offset 4
6178 #define elf_backend_can_gc_sections 1
6179 #define elf_backend_can_refcount 1
6180 #define elf_backend_got_header_size 12
6181 #define elf_backend_rela_normal 1
6182
6183 #define bfd_elf32_mkobject ppc_elf_mkobject
6184 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
6185 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
6186 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
6187 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
6188 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
6189
6190 #define elf_backend_object_p ppc_elf_object_p
6191 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
6192 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
6193 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
6194 #define elf_backend_relocate_section ppc_elf_relocate_section
6195 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
6196 #define elf_backend_check_relocs ppc_elf_check_relocs
6197 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
6198 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
6199 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
6200 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
6201 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
6202 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
6203 #define elf_backend_fake_sections ppc_elf_fake_sections
6204 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
6205 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
6206 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
6207 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
6208 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
6209 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
6210 #define elf_backend_final_write_processing ppc_elf_final_write_processing
6211 #define elf_backend_write_section ppc_elf_write_section
6212 #define elf_backend_special_sections ppc_elf_special_sections
6213
6214 #include "elf32-target.h"
git-cvsimport of binutils cvsroot