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* elflink.c (elf_link_read_relocs_from_section): Don't use
[binutils.git] / bfd / elf32-ppc.c
blob813d1491742f124453fc8805f6dcfd2fb5aca7d9
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. */
1679 if ((isec->flags & SEC_RELOC) == 0 || isec->reloc_count == 0)
1680 return TRUE;
1681
1682 /* If needed, initialize this section's cooked size. */
1683 if (isec->_cooked_size == 0)
1684 isec->_cooked_size = isec->_raw_size;
1685
1686 trampoff = (isec->_cooked_size + 3) & (bfd_vma) -4;
1687 /* Space for a branch around any trampolines. */
1688 trampoff += 4;
1689
1690 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1691
1692 /* Get a copy of the native relocations. */
1693 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
1694 link_info->keep_memory);
1695 if (internal_relocs == NULL)
1696 goto error_return;
1697
1698 ppc_info = ppc_elf_hash_table (link_info);
1699 irelend = internal_relocs + isec->reloc_count;
1700
1701 /* Get the section contents. */
1702 /* Get cached copy if it exists. */
1703 if (elf_section_data (isec)->this_hdr.contents != NULL)
1704 contents = elf_section_data (isec)->this_hdr.contents;
1705 else
1706 {
1707 /* Go get them off disk. */
1708 contents = bfd_malloc (isec->_raw_size);
1709 if (contents == NULL)
1710 goto error_return;
1711
1712 if (!bfd_get_section_contents (abfd, isec, contents, 0, isec->_raw_size))
1713 goto error_return;
1714 }
1715
1716 for (irel = internal_relocs; irel < irelend; irel++)
1717 {
1718 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
1719 bfd_vma symaddr, reladdr, toff, roff;
1720 asection *tsec;
1721 struct one_fixup *f;
1722 size_t insn_offset = 0;
1723 bfd_vma max_branch_offset, val;
1724 bfd_byte *hit_addr;
1725 unsigned long t0;
1726
1727 switch (r_type)
1728 {
1729 case R_PPC_REL24:
1730 case R_PPC_LOCAL24PC:
1731 case R_PPC_PLTREL24:
1732 max_branch_offset = 1 << 25;
1733 break;
1734
1735 case R_PPC_REL14:
1736 case R_PPC_REL14_BRTAKEN:
1737 case R_PPC_REL14_BRNTAKEN:
1738 max_branch_offset = 1 << 15;
1739 break;
1740
1741 default:
1742 continue;
1743 }
1744
1745 /* Get the value of the symbol referred to by the reloc. */
1746 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1747 {
1748 /* A local symbol. */
1749 Elf_Internal_Sym *isym;
1750
1751 /* Read this BFD's local symbols. */
1752 if (isymbuf == NULL)
1753 {
1754 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1755 if (isymbuf == NULL)
1756 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1757 symtab_hdr->sh_info, 0,
1758 NULL, NULL, NULL);
1759 if (isymbuf == 0)
1760 goto error_return;
1761 }
1762 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1763 if (isym->st_shndx == SHN_UNDEF)
1764 continue; /* We can't do anything with undefined symbols. */
1765 else if (isym->st_shndx == SHN_ABS)
1766 tsec = bfd_abs_section_ptr;
1767 else if (isym->st_shndx == SHN_COMMON)
1768 tsec = bfd_com_section_ptr;
1769 else
1770 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1771
1772 toff = isym->st_value;
1773 }
1774 else
1775 {
1776 /* Global symbol handling. */
1777 unsigned long indx;
1778 struct elf_link_hash_entry *h;
1779
1780 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1781 h = elf_sym_hashes (abfd)[indx];
1782
1783 while (h->root.type == bfd_link_hash_indirect
1784 || h->root.type == bfd_link_hash_warning)
1785 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1786
1787 if (r_type == R_PPC_PLTREL24
1788 && ppc_info->plt != NULL
1789 && h->plt.offset != (bfd_vma) -1)
1790 {
1791 tsec = ppc_info->plt;
1792 toff = h->plt.offset;
1793 }
1794 else if (h->root.type == bfd_link_hash_defined
1795 || h->root.type == bfd_link_hash_defweak)
1796 {
1797 tsec = h->root.u.def.section;
1798 toff = h->root.u.def.value;
1799 }
1800 else
1801 continue;
1802 }
1803
1804 /* If the branch and target are in the same section, you have
1805 no hope of adding stubs. We'll error out later should the
1806 branch overflow. */
1807 if (tsec == isec)
1808 continue;
1809
1810 toff += irel->r_addend;
1811 if (tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
1812 toff = _bfd_merged_section_offset (abfd, &tsec,
1813 elf_section_data (tsec)->sec_info,
1814 toff, 0);
1815
1816 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
1817
1818 roff = irel->r_offset;
1819 reladdr = isec->output_section->vma + isec->output_offset + roff;
1820
1821 /* If the branch is in range, no need to do anything. */
1822 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
1823 continue;
1824
1825 /* Look for an existing fixup to this address. */
1826 for (f = fixups; f ; f = f->next)
1827 if (f->tsec == tsec && f->toff == toff)
1828 break;
1829
1830 if (f == NULL)
1831 {
1832 size_t size;
1833 unsigned long stub_rtype;
1834
1835 val = trampoff - roff;
1836 if (val >= max_branch_offset)
1837 /* Oh dear, we can't reach a trampoline. Don't try to add
1838 one. We'll report an error later. */
1839 continue;
1840
1841 if (link_info->shared)
1842 {
1843 size = 4 * ARRAY_SIZE (shared_stub_entry);
1844 insn_offset = 12;
1845 stub_rtype = R_PPC_RELAX32PC;
1846 }
1847 else
1848 {
1849 size = 4 * ARRAY_SIZE (stub_entry);
1850 insn_offset = 0;
1851 stub_rtype = R_PPC_RELAX32;
1852 }
1853
1854 /* Hijack the old relocation. Since we need two
1855 relocations for this use a "composite" reloc. */
1856 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1857 stub_rtype);
1858 irel->r_offset = trampoff + insn_offset;
1859
1860 /* Record the fixup so we don't do it again this section. */
1861 f = bfd_malloc (sizeof (*f));
1862 f->next = fixups;
1863 f->tsec = tsec;
1864 f->toff = toff;
1865 f->trampoff = trampoff;
1866 fixups = f;
1867
1868 trampoff += size;
1869 }
1870 else
1871 {
1872 val = f->trampoff - roff;
1873 if (val >= max_branch_offset)
1874 continue;
1875
1876 /* Nop out the reloc, since we're finalizing things here. */
1877 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
1878 }
1879
1880 /* Fix up the existing branch to hit the trampoline. */
1881 hit_addr = contents + roff;
1882 switch (r_type)
1883 {
1884 case R_PPC_REL24:
1885 case R_PPC_LOCAL24PC:
1886 case R_PPC_PLTREL24:
1887 t0 = bfd_get_32 (abfd, hit_addr);
1888 t0 &= ~0x3fffffc;
1889 t0 |= val & 0x3fffffc;
1890 bfd_put_32 (abfd, t0, hit_addr);
1891 break;
1892
1893 case R_PPC_REL14:
1894 case R_PPC_REL14_BRTAKEN:
1895 case R_PPC_REL14_BRNTAKEN:
1896 t0 = bfd_get_32 (abfd, hit_addr);
1897 t0 &= ~0xfffc;
1898 t0 |= val & 0xfffc;
1899 bfd_put_32 (abfd, t0, hit_addr);
1900 break;
1901 }
1902 }
1903
1904 /* Write out the trampolines. */
1905 changed = fixups != NULL;
1906 if (fixups != NULL)
1907 {
1908 const int *stub;
1909 bfd_byte *dest;
1910 bfd_vma val;
1911 int i, size;
1912
1913 do
1914 {
1915 struct one_fixup *f = fixups;
1916 fixups = fixups->next;
1917 free (f);
1918 }
1919 while (fixups);
1920
1921 contents = bfd_realloc (contents, trampoff);
1922 if (contents == NULL)
1923 goto error_return;
1924
1925 isec->_cooked_size = (isec->_cooked_size + 3) & (bfd_vma) -4;
1926 /* Branch around the trampolines. */
1927 val = trampoff - isec->_cooked_size + 0x48000000;
1928 dest = contents + isec->_cooked_size;
1929 isec->_cooked_size = trampoff;
1930 bfd_put_32 (abfd, val, dest);
1931 dest += 4;
1932
1933 if (link_info->shared)
1934 {
1935 stub = shared_stub_entry;
1936 size = ARRAY_SIZE (shared_stub_entry);
1937 }
1938 else
1939 {
1940 stub = stub_entry;
1941 size = ARRAY_SIZE (stub_entry);
1942 }
1943
1944 i = 0;
1945 while (dest < contents + trampoff)
1946 {
1947 bfd_put_32 (abfd, stub[i], dest);
1948 i++;
1949 if (i == size)
1950 i = 0;
1951 dest += 4;
1952 }
1953 BFD_ASSERT (i == 0);
1954 }
1955
1956 if (isymbuf != NULL
1957 && symtab_hdr->contents != (unsigned char *) isymbuf)
1958 {
1959 if (! link_info->keep_memory)
1960 free (isymbuf);
1961 else
1962 {
1963 /* Cache the symbols for elf_link_input_bfd. */
1964 symtab_hdr->contents = (unsigned char *) isymbuf;
1965 }
1966 }
1967
1968 if (contents != NULL
1969 && elf_section_data (isec)->this_hdr.contents != contents)
1970 {
1971 if (!changed && !link_info->keep_memory)
1972 free (contents);
1973 else
1974 {
1975 /* Cache the section contents for elf_link_input_bfd. */
1976 elf_section_data (isec)->this_hdr.contents = contents;
1977 }
1978 }
1979
1980 if (elf_section_data (isec)->relocs != internal_relocs)
1981 {
1982 if (!changed)
1983 free (internal_relocs);
1984 else
1985 elf_section_data (isec)->relocs = internal_relocs;
1986 }
1987
1988 *again = changed;
1989 return TRUE;
1990
1991 error_return:
1992 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
1993 free (isymbuf);
1994 if (contents != NULL
1995 && elf_section_data (isec)->this_hdr.contents != contents)
1996 free (contents);
1997 if (internal_relocs != NULL
1998 && elf_section_data (isec)->relocs != internal_relocs)
1999 free (internal_relocs);
2000 return FALSE;
2001 }
2002 \f
2003 static reloc_howto_type *
2004 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2005 bfd_reloc_code_real_type code)
2006 {
2007 enum elf_ppc_reloc_type r;
2008
2009 /* Initialize howto table if not already done. */
2010 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2011 ppc_elf_howto_init ();
2012
2013 switch (code)
2014 {
2015 default:
2016 return NULL;
2017
2018 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
2019 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
2020 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
2021 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
2022 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
2023 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
2024 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
2025 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
2026 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
2027 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
2028 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
2029 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
2030 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
2031 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
2032 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
2033 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
2034 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
2035 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
2036 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
2037 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
2038 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
2039 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
2040 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
2041 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
2042 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
2043 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
2044 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
2045 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
2046 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
2047 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
2048 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
2049 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
2050 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
2051 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
2052 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
2053 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
2054 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
2055 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
2056 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
2057 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
2058 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
2059 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
2060 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
2061 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
2062 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
2063 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
2064 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
2065 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
2066 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
2067 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
2068 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
2069 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
2070 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
2071 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
2072 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
2073 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
2074 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
2075 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
2076 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
2077 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
2078 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
2079 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
2080 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
2081 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
2082 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
2083 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
2084 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
2085 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
2086 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
2087 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
2088 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
2089 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
2090 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
2091 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
2092 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
2093 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
2094 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
2095 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
2096 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
2097 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2098 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2099 }
2100
2101 return ppc_elf_howto_table[r];
2102 };
2103
2104 /* Set the howto pointer for a PowerPC ELF reloc. */
2105
2106 static void
2107 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2108 arelent *cache_ptr,
2109 Elf_Internal_Rela *dst)
2110 {
2111 /* Initialize howto table if not already done. */
2112 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2113 ppc_elf_howto_init ();
2114
2115 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2116 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2117 }
2118
2119 /* Handle the R_PPC_ADDR16_HA reloc. */
2120
2121 static bfd_reloc_status_type
2122 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2123 arelent *reloc_entry,
2124 asymbol *symbol,
2125 void *data ATTRIBUTE_UNUSED,
2126 asection *input_section,
2127 bfd *output_bfd,
2128 char **error_message ATTRIBUTE_UNUSED)
2129 {
2130 bfd_vma relocation;
2131
2132 if (output_bfd != NULL)
2133 {
2134 reloc_entry->address += input_section->output_offset;
2135 return bfd_reloc_ok;
2136 }
2137
2138 if (reloc_entry->address > input_section->_cooked_size)
2139 return bfd_reloc_outofrange;
2140
2141 if (bfd_is_com_section (symbol->section))
2142 relocation = 0;
2143 else
2144 relocation = symbol->value;
2145
2146 relocation += symbol->section->output_section->vma;
2147 relocation += symbol->section->output_offset;
2148 relocation += reloc_entry->addend;
2149
2150 reloc_entry->addend += (relocation & 0x8000) << 1;
2151
2152 return bfd_reloc_continue;
2153 }
2154
2155 static bfd_reloc_status_type
2156 ppc_elf_unhandled_reloc (bfd *abfd,
2157 arelent *reloc_entry,
2158 asymbol *symbol,
2159 void *data,
2160 asection *input_section,
2161 bfd *output_bfd,
2162 char **error_message)
2163 {
2164 /* If this is a relocatable link (output_bfd test tells us), just
2165 call the generic function. Any adjustment will be done at final
2166 link time. */
2167 if (output_bfd != NULL)
2168 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2169 input_section, output_bfd, error_message);
2170
2171 if (error_message != NULL)
2172 {
2173 static char buf[60];
2174 sprintf (buf, _("generic linker can't handle %s"),
2175 reloc_entry->howto->name);
2176 *error_message = buf;
2177 }
2178 return bfd_reloc_dangerous;
2179 }
2180
2181 /* Fix bad default arch selected for a 32 bit input bfd when the
2182 default is 64 bit. */
2183
2184 static bfd_boolean
2185 ppc_elf_object_p (bfd *abfd)
2186 {
2187 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2188 {
2189 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2190
2191 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2192 {
2193 /* Relies on arch after 64 bit default being 32 bit default. */
2194 abfd->arch_info = abfd->arch_info->next;
2195 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2196 }
2197 }
2198 return TRUE;
2199 }
2200
2201 /* Function to set whether a module needs the -mrelocatable bit set. */
2202
2203 static bfd_boolean
2204 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2205 {
2206 BFD_ASSERT (!elf_flags_init (abfd)
2207 || elf_elfheader (abfd)->e_flags == flags);
2208
2209 elf_elfheader (abfd)->e_flags = flags;
2210 elf_flags_init (abfd) = TRUE;
2211 return TRUE;
2212 }
2213
2214 /* Merge backend specific data from an object file to the output
2215 object file when linking. */
2216
2217 static bfd_boolean
2218 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2219 {
2220 flagword old_flags;
2221 flagword new_flags;
2222 bfd_boolean error;
2223
2224 /* Check if we have the same endianess. */
2225 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
2226 return FALSE;
2227
2228 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2229 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2230 return TRUE;
2231
2232 new_flags = elf_elfheader (ibfd)->e_flags;
2233 old_flags = elf_elfheader (obfd)->e_flags;
2234 if (!elf_flags_init (obfd))
2235 {
2236 /* First call, no flags set. */
2237 elf_flags_init (obfd) = TRUE;
2238 elf_elfheader (obfd)->e_flags = new_flags;
2239 }
2240
2241 /* Compatible flags are ok. */
2242 else if (new_flags == old_flags)
2243 ;
2244
2245 /* Incompatible flags. */
2246 else
2247 {
2248 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
2249 to be linked with either. */
2250 error = FALSE;
2251 if ((new_flags & EF_PPC_RELOCATABLE) != 0
2252 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
2253 {
2254 error = TRUE;
2255 (*_bfd_error_handler)
2256 (_("%s: compiled with -mrelocatable and linked with "
2257 "modules compiled normally"),
2258 bfd_archive_filename (ibfd));
2259 }
2260 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
2261 && (old_flags & EF_PPC_RELOCATABLE) != 0)
2262 {
2263 error = TRUE;
2264 (*_bfd_error_handler)
2265 (_("%s: compiled normally and linked with "
2266 "modules compiled with -mrelocatable"),
2267 bfd_archive_filename (ibfd));
2268 }
2269
2270 /* The output is -mrelocatable-lib iff both the input files are. */
2271 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
2272 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
2273
2274 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
2275 but each input file is either -mrelocatable or -mrelocatable-lib. */
2276 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
2277 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
2278 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
2279 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
2280
2281 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
2282 any module uses it. */
2283 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
2284
2285 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2286 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2287
2288 /* Warn about any other mismatches. */
2289 if (new_flags != old_flags)
2290 {
2291 error = TRUE;
2292 (*_bfd_error_handler)
2293 (_("%s: uses different e_flags (0x%lx) fields "
2294 "than previous modules (0x%lx)"),
2295 bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
2296 }
2297
2298 if (error)
2299 {
2300 bfd_set_error (bfd_error_bad_value);
2301 return FALSE;
2302 }
2303 }
2304
2305 return TRUE;
2306 }
2307 \f
2308 /* Handle a PowerPC specific section when reading an object file. This
2309 is called when elfcode.h finds a section with an unknown type. */
2310
2311 static bfd_boolean
2312 ppc_elf_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, const char *name)
2313 {
2314 asection *newsect;
2315 flagword flags;
2316
2317 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2318 return FALSE;
2319
2320 newsect = hdr->bfd_section;
2321 flags = bfd_get_section_flags (abfd, newsect);
2322 if (hdr->sh_flags & SHF_EXCLUDE)
2323 flags |= SEC_EXCLUDE;
2324
2325 if (hdr->sh_type == SHT_ORDERED)
2326 flags |= SEC_SORT_ENTRIES;
2327
2328 bfd_set_section_flags (abfd, newsect, flags);
2329 return TRUE;
2330 }
2331 \f
2332 /* Set up any other section flags and such that may be necessary. */
2333
2334 static bfd_boolean
2335 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2336 Elf_Internal_Shdr *shdr,
2337 asection *asect)
2338 {
2339 if ((asect->flags & SEC_EXCLUDE) != 0)
2340 shdr->sh_flags |= SHF_EXCLUDE;
2341
2342 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2343 shdr->sh_type = SHT_ORDERED;
2344
2345 return TRUE;
2346 }
2347 \f
2348 /* Find a linker generated pointer with a given addend and type. */
2349
2350 static elf_linker_section_pointers_t *
2351 elf_find_pointer_linker_section
2352 (elf_linker_section_pointers_t *linker_pointers,
2353 bfd_vma addend,
2354 elf_linker_section_t *lsect)
2355 {
2356 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2357 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2358 return linker_pointers;
2359
2360 return NULL;
2361 }
2362 \f
2363 /* Allocate a pointer to live in a linker created section. */
2364
2365 static bfd_boolean
2366 elf_create_pointer_linker_section (bfd *abfd,
2367 struct bfd_link_info *info,
2368 elf_linker_section_t *lsect,
2369 struct elf_link_hash_entry *h,
2370 const Elf_Internal_Rela *rel)
2371 {
2372 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2373 elf_linker_section_pointers_t *linker_section_ptr;
2374 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2375 bfd_size_type amt;
2376
2377 BFD_ASSERT (lsect != NULL);
2378
2379 /* Is this a global symbol? */
2380 if (h != NULL)
2381 {
2382 struct ppc_elf_link_hash_entry *eh;
2383
2384 /* Has this symbol already been allocated? If so, our work is done. */
2385 eh = (struct ppc_elf_link_hash_entry *) h;
2386 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2387 rel->r_addend,
2388 lsect))
2389 return TRUE;
2390
2391 ptr_linker_section_ptr = &eh->linker_section_pointer;
2392 /* Make sure this symbol is output as a dynamic symbol. */
2393 if (h->dynindx == -1)
2394 {
2395 if (! _bfd_elf_link_record_dynamic_symbol (info, h))
2396 return FALSE;
2397 }
2398
2399 if (lsect->rel_section)
2400 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
2401 }
2402 else
2403 {
2404 /* Allocation of a pointer to a local symbol. */
2405 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2406
2407 /* Allocate a table to hold the local symbols if first time. */
2408 if (!ptr)
2409 {
2410 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2411
2412 amt = num_symbols;
2413 amt *= sizeof (elf_linker_section_pointers_t *);
2414 ptr = bfd_zalloc (abfd, amt);
2415
2416 if (!ptr)
2417 return FALSE;
2418
2419 elf_local_ptr_offsets (abfd) = ptr;
2420 }
2421
2422 /* Has this symbol already been allocated? If so, our work is done. */
2423 if (elf_find_pointer_linker_section (ptr[r_symndx],
2424 rel->r_addend,
2425 lsect))
2426 return TRUE;
2427
2428 ptr_linker_section_ptr = &ptr[r_symndx];
2429
2430 if (info->shared)
2431 {
2432 /* If we are generating a shared object, we need to
2433 output a R_<xxx>_RELATIVE reloc so that the
2434 dynamic linker can adjust this GOT entry. */
2435 BFD_ASSERT (lsect->rel_section != NULL);
2436 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
2437 }
2438 }
2439
2440 /* Allocate space for a pointer in the linker section, and allocate
2441 a new pointer record from internal memory. */
2442 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2443 amt = sizeof (elf_linker_section_pointers_t);
2444 linker_section_ptr = bfd_alloc (abfd, amt);
2445
2446 if (!linker_section_ptr)
2447 return FALSE;
2448
2449 linker_section_ptr->next = *ptr_linker_section_ptr;
2450 linker_section_ptr->addend = rel->r_addend;
2451 linker_section_ptr->lsect = lsect;
2452 linker_section_ptr->written_address_p = FALSE;
2453 *ptr_linker_section_ptr = linker_section_ptr;
2454
2455 linker_section_ptr->offset = lsect->section->_raw_size;
2456 lsect->section->_raw_size += 4;
2457
2458 #ifdef DEBUG
2459 fprintf (stderr,
2460 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2461 lsect->name, (long) linker_section_ptr->offset,
2462 (long) lsect->section->_raw_size);
2463 #endif
2464
2465 return TRUE;
2466 }
2467 \f
2468 #define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR)
2469
2470 /* Fill in the address for a pointer generated in a linker section. */
2471
2472 static bfd_vma
2473 elf_finish_pointer_linker_section (bfd *output_bfd,
2474 bfd *input_bfd,
2475 struct bfd_link_info *info,
2476 elf_linker_section_t *lsect,
2477 struct elf_link_hash_entry *h,
2478 bfd_vma relocation,
2479 const Elf_Internal_Rela *rel,
2480 int relative_reloc)
2481 {
2482 elf_linker_section_pointers_t *linker_section_ptr;
2483
2484 BFD_ASSERT (lsect != NULL);
2485
2486 if (h != NULL)
2487 {
2488 /* Handle global symbol. */
2489 struct ppc_elf_link_hash_entry *eh;
2490
2491 eh = (struct ppc_elf_link_hash_entry *) h;
2492 linker_section_ptr
2493 = elf_find_pointer_linker_section (eh->linker_section_pointer,
2494 rel->r_addend,
2495 lsect);
2496
2497 BFD_ASSERT (linker_section_ptr != NULL);
2498
2499 if (! elf_hash_table (info)->dynamic_sections_created
2500 || (info->shared
2501 && info->symbolic
2502 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
2503 {
2504 /* This is actually a static link, or it is a
2505 -Bsymbolic link and the symbol is defined
2506 locally. We must initialize this entry in the
2507 global section.
2508
2509 When doing a dynamic link, we create a .rela.<xxx>
2510 relocation entry to initialize the value. This
2511 is done in the finish_dynamic_symbol routine. */
2512 if (!linker_section_ptr->written_address_p)
2513 {
2514 linker_section_ptr->written_address_p = TRUE;
2515 bfd_put_ptr (output_bfd,
2516 relocation + linker_section_ptr->addend,
2517 (lsect->section->contents
2518 + linker_section_ptr->offset));
2519 }
2520 }
2521 }
2522 else
2523 {
2524 /* Handle local symbol. */
2525 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2526 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
2527 BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
2528 linker_section_ptr = (elf_find_pointer_linker_section
2529 (elf_local_ptr_offsets (input_bfd)[r_symndx],
2530 rel->r_addend,
2531 lsect));
2532
2533 BFD_ASSERT (linker_section_ptr != NULL);
2534
2535 /* Write out pointer if it hasn't been rewritten out before. */
2536 if (!linker_section_ptr->written_address_p)
2537 {
2538 linker_section_ptr->written_address_p = TRUE;
2539 bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
2540 lsect->section->contents + linker_section_ptr->offset);
2541
2542 if (info->shared)
2543 {
2544 /* We need to generate a relative reloc for the dynamic
2545 linker. */
2546
2547 asection *srel = lsect->rel_section;
2548 Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL];
2549 bfd_byte *erel;
2550 const struct elf_backend_data *bed;
2551 unsigned int i;
2552
2553 BFD_ASSERT (srel != NULL);
2554
2555 bed = get_elf_backend_data (output_bfd);
2556 for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
2557 {
2558 outrel[i].r_offset = (lsect->section->output_section->vma
2559 + lsect->section->output_offset
2560 + linker_section_ptr->offset);
2561 outrel[i].r_info = 0;
2562 outrel[i].r_addend = 0;
2563 }
2564 outrel[0].r_info = ELF32_R_INFO (0, relative_reloc);
2565 erel = lsect->section->contents;
2566 erel += (elf_section_data (lsect->section)->rel_count++
2567 * sizeof (Elf32_External_Rela));
2568 bfd_elf32_swap_reloca_out (output_bfd, outrel, erel);
2569 }
2570 }
2571 }
2572
2573 relocation = (lsect->section->output_offset
2574 + linker_section_ptr->offset
2575 - lsect->sym_offset);
2576
2577 #ifdef DEBUG
2578 fprintf (stderr,
2579 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
2580 lsect->name, (long) relocation, (long) relocation);
2581 #endif
2582
2583 /* Subtract out the addend, because it will get added back in by the normal
2584 processing. */
2585 return relocation - linker_section_ptr->addend;
2586 }
2587 \f
2588 /* Create a special linker section */
2589 static elf_linker_section_t *
2590 ppc_elf_create_linker_section (bfd *abfd,
2591 struct bfd_link_info *info,
2592 enum elf_linker_section_enum which)
2593 {
2594 elf_linker_section_t *lsect;
2595 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2596 asection *s;
2597 bfd_size_type amt;
2598 flagword flags;
2599 const char *name;
2600 const char *rel_name;
2601 const char *sym_name;
2602 bfd_vma sym_offset;
2603
2604 /* Both of these sections are (technically) created by the user
2605 putting data in them, so they shouldn't be marked
2606 SEC_LINKER_CREATED.
2607
2608 The linker creates them so it has somewhere to attach their
2609 respective symbols. In fact, if they were empty it would
2610 be OK to leave the symbol set to 0 (or any random number), because
2611 the appropriate register should never be used. */
2612 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
2613 sym_offset = 32768;
2614
2615 switch (which)
2616 {
2617 default:
2618 abort ();
2619 return NULL;
2620
2621 case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
2622 name = ".sdata";
2623 rel_name = ".rela.sdata";
2624 sym_name = "_SDA_BASE_";
2625 break;
2626
2627 case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
2628 name = ".sdata2";
2629 rel_name = ".rela.sdata2";
2630 sym_name = "_SDA2_BASE_";
2631 flags |= SEC_READONLY;
2632 break;
2633 }
2634
2635 /* Record the first bfd that needs the special sections. */
2636 if (!htab->elf.dynobj)
2637 htab->elf.dynobj = abfd;
2638
2639 amt = sizeof (elf_linker_section_t);
2640 lsect = bfd_zalloc (htab->elf.dynobj, amt);
2641
2642 lsect->sym_offset = sym_offset;
2643
2644 /* See if the sections already exist. */
2645 s = bfd_get_section_by_name (htab->elf.dynobj, name);
2646 if (s == NULL || (s->flags & flags) != flags)
2647 {
2648 s = bfd_make_section_anyway (htab->elf.dynobj, name);
2649 if (s == NULL
2650 || !bfd_set_section_flags (htab->elf.dynobj, s, flags))
2651 return NULL;
2652 }
2653 lsect->section = s;
2654
2655 if (bfd_get_section_alignment (htab->elf.dynobj, s) < 2
2656 && !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2657 return NULL;
2658
2659 s->_raw_size = align_power (s->_raw_size, 2);
2660
2661 #ifdef DEBUG
2662 fprintf (stderr, "Creating section %s, current size = %ld\n",
2663 name, (long) s->_raw_size);
2664 #endif
2665
2666 if (sym_name)
2667 {
2668 struct elf_link_hash_entry *h;
2669 struct bfd_link_hash_entry *bh;
2670
2671 #ifdef DEBUG
2672 fprintf (stderr, "Adding %s to section %s\n", sym_name, name);
2673 #endif
2674 bh = bfd_link_hash_lookup (info->hash, sym_name,
2675 FALSE, FALSE, FALSE);
2676
2677 if ((bh == NULL || bh->type == bfd_link_hash_undefined)
2678 && !(_bfd_generic_link_add_one_symbol
2679 (info, abfd, sym_name, BSF_GLOBAL, s, sym_offset, NULL,
2680 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
2681 return NULL;
2682 h = (struct elf_link_hash_entry *) bh;
2683
2684 h->type = STT_OBJECT;
2685 lsect->sym_hash = h;
2686
2687 if (info->shared
2688 && ! _bfd_elf_link_record_dynamic_symbol (info, h))
2689 return NULL;
2690 }
2691
2692 if (info->shared)
2693 {
2694 s = bfd_make_section_anyway (htab->elf.dynobj, rel_name);
2695 lsect->rel_section = s;
2696 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2697 | SEC_LINKER_CREATED | SEC_READONLY);
2698 if (s == NULL
2699 || ! bfd_set_section_flags (htab->elf.dynobj, s, flags)
2700 || ! bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2701 return NULL;
2702 }
2703
2704 return lsect;
2705 }
2706 \f
2707 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
2708 need to bump up the number of section headers. */
2709
2710 static int
2711 ppc_elf_additional_program_headers (bfd *abfd)
2712 {
2713 asection *s;
2714 int ret;
2715
2716 ret = 0;
2717
2718 s = bfd_get_section_by_name (abfd, ".interp");
2719 if (s != NULL)
2720 ++ret;
2721
2722 s = bfd_get_section_by_name (abfd, ".sbss2");
2723 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2724 ++ret;
2725
2726 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2727 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2728 ++ret;
2729
2730 return ret;
2731 }
2732
2733 /* Modify the segment map if needed. */
2734
2735 static bfd_boolean
2736 ppc_elf_modify_segment_map (bfd *abfd ATTRIBUTE_UNUSED,
2737 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2738 {
2739 return TRUE;
2740 }
2741 \f
2742 /* The powerpc .got has a blrl instruction in it. Mark it executable. */
2743
2744 static bfd_boolean
2745 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2746 {
2747 struct ppc_elf_link_hash_table *htab;
2748 asection *s;
2749 flagword flags;
2750
2751 if (!_bfd_elf_create_got_section (abfd, info))
2752 return FALSE;
2753
2754 htab = ppc_elf_hash_table (info);
2755 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2756 if (s == NULL)
2757 abort ();
2758
2759 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2760 | SEC_LINKER_CREATED);
2761 if (!bfd_set_section_flags (abfd, s, flags))
2762 return FALSE;
2763
2764 htab->relgot = bfd_make_section (abfd, ".rela.got");
2765 if (!htab->relgot
2766 || ! bfd_set_section_flags (abfd, htab->relgot,
2767 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2768 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2769 | SEC_READONLY))
2770 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2771 return FALSE;
2772
2773 return TRUE;
2774 }
2775
2776 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2777 to output sections (just like _bfd_elf_create_dynamic_sections has
2778 to create .dynbss and .rela.bss). */
2779
2780 static bfd_boolean
2781 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2782 {
2783 struct ppc_elf_link_hash_table *htab;
2784 asection *s;
2785 flagword flags;
2786
2787 htab = ppc_elf_hash_table (info);
2788
2789 if (htab->got == NULL
2790 && !ppc_elf_create_got (abfd, info))
2791 return FALSE;
2792
2793 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2794 return FALSE;
2795
2796 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2797 | SEC_LINKER_CREATED);
2798
2799 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2800 htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
2801 if (s == NULL
2802 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
2803 return FALSE;
2804
2805 if (! info->shared)
2806 {
2807 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2808 htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss");
2809 if (s == NULL
2810 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
2811 || ! bfd_set_section_alignment (abfd, s, 2))
2812 return FALSE;
2813 }
2814
2815 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2816 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2817 if (s == NULL)
2818 abort ();
2819
2820 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
2821 return bfd_set_section_flags (abfd, s, flags);
2822 }
2823
2824 /* Adjust a symbol defined by a dynamic object and referenced by a
2825 regular object. The current definition is in some section of the
2826 dynamic object, but we're not including those sections. We have to
2827 change the definition to something the rest of the link can
2828 understand. */
2829
2830 static bfd_boolean
2831 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2832 struct elf_link_hash_entry *h)
2833 {
2834 struct ppc_elf_link_hash_table *htab;
2835 asection *s;
2836 unsigned int power_of_two;
2837
2838 #ifdef DEBUG
2839 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
2840 h->root.root.string);
2841 #endif
2842
2843 /* Make sure we know what is going on here. */
2844 htab = ppc_elf_hash_table (info);
2845 BFD_ASSERT (htab->elf.dynobj != NULL
2846 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2847 || h->weakdef != NULL
2848 || ((h->elf_link_hash_flags
2849 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2850 && (h->elf_link_hash_flags
2851 & ELF_LINK_HASH_REF_REGULAR) != 0
2852 && (h->elf_link_hash_flags
2853 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2854
2855 /* Deal with function syms. */
2856 if (h->type == STT_FUNC
2857 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2858 {
2859 /* Clear procedure linkage table information for any symbol that
2860 won't need a .plt entry. */
2861 if (h->plt.refcount <= 0
2862 || SYMBOL_CALLS_LOCAL (info, h)
2863 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2864 && h->root.type == bfd_link_hash_undefweak))
2865 {
2866 /* A PLT entry is not required/allowed when:
2867
2868 1. We are not using ld.so; because then the PLT entry
2869 can't be set up, so we can't use one. In this case,
2870 ppc_elf_adjust_dynamic_symbol won't even be called.
2871
2872 2. GC has rendered the entry unused.
2873
2874 3. We know for certain that a call to this symbol
2875 will go to this object, or will remain undefined. */
2876 h->plt.offset = (bfd_vma) -1;
2877 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2878 }
2879 return TRUE;
2880 }
2881 else
2882 h->plt.offset = (bfd_vma) -1;
2883
2884 /* If this is a weak symbol, and there is a real definition, the
2885 processor independent code will have arranged for us to see the
2886 real definition first, and we can just use the same value. */
2887 if (h->weakdef != NULL)
2888 {
2889 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2890 || h->weakdef->root.type == bfd_link_hash_defweak);
2891 h->root.u.def.section = h->weakdef->root.u.def.section;
2892 h->root.u.def.value = h->weakdef->root.u.def.value;
2893 if (ELIMINATE_COPY_RELOCS)
2894 h->elf_link_hash_flags
2895 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
2896 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
2897 return TRUE;
2898 }
2899
2900 /* This is a reference to a symbol defined by a dynamic object which
2901 is not a function. */
2902
2903 /* If we are creating a shared library, we must presume that the
2904 only references to the symbol are via the global offset table.
2905 For such cases we need not do anything here; the relocations will
2906 be handled correctly by relocate_section. */
2907 if (info->shared)
2908 return TRUE;
2909
2910 /* If there are no references to this symbol that do not use the
2911 GOT, we don't need to generate a copy reloc. */
2912 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
2913 return TRUE;
2914
2915 if (ELIMINATE_COPY_RELOCS)
2916 {
2917 struct ppc_elf_dyn_relocs *p;
2918 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
2919 {
2920 s = p->sec->output_section;
2921 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2922 break;
2923 }
2924
2925 /* If we didn't find any dynamic relocs in read-only sections, then
2926 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2927 if (p == NULL)
2928 {
2929 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
2930 return TRUE;
2931 }
2932 }
2933
2934 /* We must allocate the symbol in our .dynbss section, which will
2935 become part of the .bss section of the executable. There will be
2936 an entry for this symbol in the .dynsym section. The dynamic
2937 object will contain position independent code, so all references
2938 from the dynamic object to this symbol will go through the global
2939 offset table. The dynamic linker will use the .dynsym entry to
2940 determine the address it must put in the global offset table, so
2941 both the dynamic object and the regular object will refer to the
2942 same memory location for the variable.
2943
2944 Of course, if the symbol is sufficiently small, we must instead
2945 allocate it in .sbss. FIXME: It would be better to do this if and
2946 only if there were actually SDAREL relocs for that symbol. */
2947
2948 if (h->size <= elf_gp_size (htab->elf.dynobj))
2949 s = htab->dynsbss;
2950 else
2951 s = htab->dynbss;
2952 BFD_ASSERT (s != NULL);
2953
2954 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
2955 copy the initial value out of the dynamic object and into the
2956 runtime process image. We need to remember the offset into the
2957 .rela.bss section we are going to use. */
2958 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2959 {
2960 asection *srel;
2961
2962 if (h->size <= elf_gp_size (htab->elf.dynobj))
2963 srel = htab->relsbss;
2964 else
2965 srel = htab->relbss;
2966 BFD_ASSERT (srel != NULL);
2967 srel->_raw_size += sizeof (Elf32_External_Rela);
2968 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2969 }
2970
2971 /* We need to figure out the alignment required for this symbol. I
2972 have no idea how ELF linkers handle this. */
2973 power_of_two = bfd_log2 (h->size);
2974 if (power_of_two > 4)
2975 power_of_two = 4;
2976
2977 /* Apply the required alignment. */
2978 s->_raw_size = BFD_ALIGN (s->_raw_size,
2979 (bfd_size_type) (1 << power_of_two));
2980 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
2981 {
2982 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
2983 return FALSE;
2984 }
2985
2986 /* Define the symbol as being at this point in the section. */
2987 h->root.u.def.section = s;
2988 h->root.u.def.value = s->_raw_size;
2989
2990 /* Increment the section size to make room for the symbol. */
2991 s->_raw_size += h->size;
2992
2993 return TRUE;
2994 }
2995 \f
2996 /* This is the condition under which finish_dynamic_symbol will be
2997 called from elflink.h. If elflink.h doesn't call our
2998 finish_dynamic_symbol routine, we'll need to do something about
2999 initializing any .plt and .got entries in relocate_section. */
3000 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
3001 ((DYN) \
3002 && ((SHARED) \
3003 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
3004 && ((H)->dynindx != -1 \
3005 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
3006
3007 /* Of those relocs that might be copied as dynamic relocs, this macro
3008 selects those that must be copied when linking a shared library,
3009 even when the symbol is local. */
3010
3011 #define MUST_BE_DYN_RELOC(RTYPE) \
3012 ((RTYPE) != R_PPC_REL24 \
3013 && (RTYPE) != R_PPC_REL14 \
3014 && (RTYPE) != R_PPC_REL14_BRTAKEN \
3015 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
3016 && (RTYPE) != R_PPC_REL32)
3017
3018 /* Allocate space in associated reloc sections for dynamic relocs. */
3019
3020 static bfd_boolean
3021 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3022 {
3023 struct bfd_link_info *info = inf;
3024 struct ppc_elf_link_hash_entry *eh;
3025 struct ppc_elf_link_hash_table *htab;
3026 struct ppc_elf_dyn_relocs *p;
3027
3028 if (h->root.type == bfd_link_hash_indirect)
3029 return TRUE;
3030
3031 if (h->root.type == bfd_link_hash_warning)
3032 /* When warning symbols are created, they **replace** the "real"
3033 entry in the hash table, thus we never get to see the real
3034 symbol in a hash traversal. So look at it now. */
3035 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3036
3037 htab = ppc_elf_hash_table (info);
3038 if (htab->elf.dynamic_sections_created
3039 && h->plt.refcount > 0)
3040 {
3041 /* Make sure this symbol is output as a dynamic symbol. */
3042 if (h->dynindx == -1
3043 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3044 {
3045 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
3046 return FALSE;
3047 }
3048
3049 if (info->shared
3050 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3051 {
3052 asection *s = htab->plt;
3053
3054 /* If this is the first .plt entry, make room for the special
3055 first entry. */
3056 if (s->_raw_size == 0)
3057 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
3058
3059 /* The PowerPC PLT is actually composed of two parts, the
3060 first part is 2 words (for a load and a jump), and then
3061 there is a remaining word available at the end. */
3062 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
3063 + (PLT_SLOT_SIZE
3064 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE)
3065 / PLT_ENTRY_SIZE)));
3066
3067 /* If this symbol is not defined in a regular file, and we
3068 are not generating a shared library, then set the symbol
3069 to this location in the .plt. This is required to make
3070 function pointers compare as equal between the normal
3071 executable and the shared library. */
3072 if (! info->shared
3073 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3074 {
3075 h->root.u.def.section = s;
3076 h->root.u.def.value = h->plt.offset;
3077 }
3078
3079 /* Make room for this entry. After the 8192nd entry, room
3080 for two entries is allocated. */
3081 s->_raw_size += PLT_ENTRY_SIZE;
3082 if ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
3083 > PLT_NUM_SINGLE_ENTRIES)
3084 s->_raw_size += PLT_ENTRY_SIZE;
3085
3086 /* We also need to make an entry in the .rela.plt section. */
3087 htab->relplt->_raw_size += sizeof (Elf32_External_Rela);
3088 }
3089 else
3090 {
3091 h->plt.offset = (bfd_vma) -1;
3092 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3093 }
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 eh = (struct ppc_elf_link_hash_entry *) h;
3102 if (eh->elf.got.refcount > 0)
3103 {
3104 /* Make sure this symbol is output as a dynamic symbol. */
3105 if (eh->elf.dynindx == -1
3106 && (eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3107 {
3108 if (!bfd_elf32_link_record_dynamic_symbol (info, &eh->elf))
3109 return FALSE;
3110 }
3111
3112 if (eh->tls_mask == (TLS_TLS | TLS_LD)
3113 && !(eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
3114 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
3115 eh->elf.got.offset = (bfd_vma) -1;
3116 else
3117 {
3118 bfd_boolean dyn;
3119 eh->elf.got.offset = htab->got->_raw_size;
3120 if ((eh->tls_mask & TLS_TLS) != 0)
3121 {
3122 if ((eh->tls_mask & TLS_LD) != 0)
3123 htab->got->_raw_size += 8;
3124 if ((eh->tls_mask & TLS_GD) != 0)
3125 htab->got->_raw_size += 8;
3126 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
3127 htab->got->_raw_size += 4;
3128 if ((eh->tls_mask & TLS_DTPREL) != 0)
3129 htab->got->_raw_size += 4;
3130 }
3131 else
3132 htab->got->_raw_size += 4;
3133 dyn = htab->elf.dynamic_sections_created;
3134 if ((info->shared
3135 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
3136 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
3137 || eh->elf.root.type != bfd_link_hash_undefweak))
3138 {
3139 /* All the entries we allocated need relocs. */
3140 htab->relgot->_raw_size
3141 += ((htab->got->_raw_size - eh->elf.got.offset) / 4
3142 * sizeof (Elf32_External_Rela));
3143 /* Except LD only needs one. */
3144 if ((eh->tls_mask & TLS_LD) != 0)
3145 htab->relgot->_raw_size -= sizeof (Elf32_External_Rela);
3146 }
3147 }
3148 }
3149 else
3150 eh->elf.got.offset = (bfd_vma) -1;
3151
3152 if (eh->dyn_relocs == NULL)
3153 return TRUE;
3154
3155 /* In the shared -Bsymbolic case, discard space allocated for
3156 dynamic pc-relative relocs against symbols which turn out to be
3157 defined in regular objects. For the normal shared case, discard
3158 space for relocs that have become local due to symbol visibility
3159 changes. */
3160
3161 if (info->shared)
3162 {
3163 /* Relocs that use pc_count are those that appear on a call insn,
3164 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
3165 generated via assembly. We want calls to protected symbols to
3166 resolve directly to the function rather than going via the plt.
3167 If people want function pointer comparisons to work as expected
3168 then they should avoid writing weird assembly. */
3169 if (SYMBOL_CALLS_LOCAL (info, h))
3170 {
3171 struct ppc_elf_dyn_relocs **pp;
3172
3173 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3174 {
3175 p->count -= p->pc_count;
3176 p->pc_count = 0;
3177 if (p->count == 0)
3178 *pp = p->next;
3179 else
3180 pp = &p->next;
3181 }
3182 }
3183
3184 /* Also discard relocs on undefined weak syms with non-default
3185 visibility. */
3186 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3187 && h->root.type == bfd_link_hash_undefweak)
3188 eh->dyn_relocs = NULL;
3189
3190 /* Make sure undefined weak symbols are output as a dynamic symbol
3191 in PIEs. */
3192 if (info->pie
3193 && eh->dyn_relocs != NULL
3194 && h->dynindx == -1
3195 && h->root.type == bfd_link_hash_undefweak
3196 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3197 {
3198 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
3199 return FALSE;
3200 }
3201 }
3202 else if (ELIMINATE_COPY_RELOCS)
3203 {
3204 /* For the non-shared case, discard space for relocs against
3205 symbols which turn out to need copy relocs or are not
3206 dynamic. */
3207
3208 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3209 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3210 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3211 {
3212 /* Make sure this symbol is output as a dynamic symbol.
3213 Undefined weak syms won't yet be marked as dynamic. */
3214 if (h->dynindx == -1
3215 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3216 {
3217 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
3218 return FALSE;
3219 }
3220
3221 /* If that succeeded, we know we'll be keeping all the
3222 relocs. */
3223 if (h->dynindx != -1)
3224 goto keep;
3225 }
3226
3227 eh->dyn_relocs = NULL;
3228
3229 keep: ;
3230 }
3231
3232 /* Finally, allocate space. */
3233 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3234 {
3235 asection *sreloc = elf_section_data (p->sec)->sreloc;
3236 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
3237 }
3238
3239 return TRUE;
3240 }
3241
3242 /* Find any dynamic relocs that apply to read-only sections. */
3243
3244 static bfd_boolean
3245 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
3246 {
3247 struct ppc_elf_dyn_relocs *p;
3248
3249 if (h->root.type == bfd_link_hash_indirect)
3250 return TRUE;
3251
3252 if (h->root.type == bfd_link_hash_warning)
3253 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3254
3255 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3256 {
3257 asection *s = p->sec->output_section;
3258
3259 if (s != NULL
3260 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
3261 == (SEC_READONLY | SEC_ALLOC)))
3262 {
3263 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
3264
3265 /* Not an error, just cut short the traversal. */
3266 return FALSE;
3267 }
3268 }
3269 return TRUE;
3270 }
3271
3272 /* Set the sizes of the dynamic sections. */
3273
3274 static bfd_boolean
3275 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3276 struct bfd_link_info *info)
3277 {
3278 struct ppc_elf_link_hash_table *htab;
3279 asection *s;
3280 bfd_boolean relocs;
3281 bfd *ibfd;
3282
3283 #ifdef DEBUG
3284 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
3285 #endif
3286
3287 htab = ppc_elf_hash_table (info);
3288 BFD_ASSERT (htab->elf.dynobj != NULL);
3289
3290 if (elf_hash_table (info)->dynamic_sections_created)
3291 {
3292 /* Set the contents of the .interp section to the interpreter. */
3293 if (info->executable)
3294 {
3295 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
3296 BFD_ASSERT (s != NULL);
3297 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3298 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3299 }
3300 }
3301
3302 if (htab->tlsld_got.refcount > 0)
3303 {
3304 htab->tlsld_got.offset = htab->got->_raw_size;
3305 htab->got->_raw_size += 8;
3306 if (info->shared)
3307 htab->relgot->_raw_size += sizeof (Elf32_External_Rela);
3308 }
3309 else
3310 htab->tlsld_got.offset = (bfd_vma) -1;
3311
3312 /* Set up .got offsets for local syms, and space for local dynamic
3313 relocs. */
3314 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3315 {
3316 bfd_signed_vma *local_got;
3317 bfd_signed_vma *end_local_got;
3318 char *lgot_masks;
3319 bfd_size_type locsymcount;
3320 Elf_Internal_Shdr *symtab_hdr;
3321 asection *srel;
3322
3323 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
3324 continue;
3325
3326 for (s = ibfd->sections; s != NULL; s = s->next)
3327 {
3328 struct ppc_elf_dyn_relocs *p;
3329
3330 for (p = ((struct ppc_elf_dyn_relocs *)
3331 elf_section_data (s)->local_dynrel);
3332 p != NULL;
3333 p = p->next)
3334 {
3335 if (!bfd_is_abs_section (p->sec)
3336 && bfd_is_abs_section (p->sec->output_section))
3337 {
3338 /* Input section has been discarded, either because
3339 it is a copy of a linkonce section or due to
3340 linker script /DISCARD/, so we'll be discarding
3341 the relocs too. */
3342 }
3343 else if (p->count != 0)
3344 {
3345 elf_section_data (p->sec)->sreloc->_raw_size
3346 += p->count * sizeof (Elf32_External_Rela);
3347 if ((p->sec->output_section->flags
3348 & (SEC_READONLY | SEC_ALLOC))
3349 == (SEC_READONLY | SEC_ALLOC))
3350 info->flags |= DF_TEXTREL;
3351 }
3352 }
3353 }
3354
3355 local_got = elf_local_got_refcounts (ibfd);
3356 if (!local_got)
3357 continue;
3358
3359 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3360 locsymcount = symtab_hdr->sh_info;
3361 end_local_got = local_got + locsymcount;
3362 lgot_masks = (char *) end_local_got;
3363 s = htab->got;
3364 srel = htab->relgot;
3365 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3366 if (*local_got > 0)
3367 {
3368 if (*lgot_masks == (TLS_TLS | TLS_LD))
3369 {
3370 /* If just an LD reloc, we'll just use
3371 htab->tlsld_got.offset. */
3372 if (htab->tlsld_got.offset == (bfd_vma) -1)
3373 {
3374 htab->tlsld_got.offset = s->_raw_size;
3375 s->_raw_size += 8;
3376 if (info->shared)
3377 srel->_raw_size += sizeof (Elf32_External_Rela);
3378 }
3379 *local_got = (bfd_vma) -1;
3380 }
3381 else
3382 {
3383 *local_got = s->_raw_size;
3384 if ((*lgot_masks & TLS_TLS) != 0)
3385 {
3386 if ((*lgot_masks & TLS_GD) != 0)
3387 s->_raw_size += 8;
3388 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
3389 s->_raw_size += 4;
3390 if ((*lgot_masks & TLS_DTPREL) != 0)
3391 s->_raw_size += 4;
3392 }
3393 else
3394 s->_raw_size += 4;
3395 if (info->shared)
3396 srel->_raw_size += ((s->_raw_size - *local_got) / 4
3397 * sizeof (Elf32_External_Rela));
3398 }
3399 }
3400 else
3401 *local_got = (bfd_vma) -1;
3402 }
3403
3404 /* Allocate space for global sym dynamic relocs. */
3405 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3406
3407 /* We've now determined the sizes of the various dynamic sections.
3408 Allocate memory for them. */
3409 relocs = FALSE;
3410 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
3411 {
3412 if ((s->flags & SEC_LINKER_CREATED) == 0)
3413 continue;
3414
3415 if (s == htab->plt
3416 || s == htab->got
3417 || (htab->sdata != NULL && s == htab->sdata->section)
3418 || (htab->sdata2 != NULL && s == htab->sdata2->section))
3419 {
3420 /* Strip this section if we don't need it; see the
3421 comment below. */
3422 }
3423 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
3424 {
3425 if (s->_raw_size == 0)
3426 {
3427 /* If we don't need this section, strip it from the
3428 output file. This is mostly to handle .rela.bss and
3429 .rela.plt. We must create both sections in
3430 create_dynamic_sections, because they must be created
3431 before the linker maps input sections to output
3432 sections. The linker does that before
3433 adjust_dynamic_symbol is called, and it is that
3434 function which decides whether anything needs to go
3435 into these sections. */
3436 }
3437 else
3438 {
3439 /* Remember whether there are any relocation sections. */
3440 relocs = TRUE;
3441
3442 /* We use the reloc_count field as a counter if we need
3443 to copy relocs into the output file. */
3444 s->reloc_count = 0;
3445 }
3446 }
3447 else
3448 {
3449 /* It's not one of our sections, so don't allocate space. */
3450 continue;
3451 }
3452
3453 if (s->_raw_size == 0)
3454 {
3455 _bfd_strip_section_from_output (info, s);
3456 continue;
3457 }
3458
3459 /* Allocate memory for the section contents. */
3460 s->contents = bfd_zalloc (htab->elf.dynobj, s->_raw_size);
3461 if (s->contents == NULL)
3462 return FALSE;
3463 }
3464
3465 if (htab->elf.dynamic_sections_created)
3466 {
3467 /* Add some entries to the .dynamic section. We fill in the
3468 values later, in ppc_elf_finish_dynamic_sections, but we
3469 must add the entries now so that we get the correct size for
3470 the .dynamic section. The DT_DEBUG entry is filled in by the
3471 dynamic linker and used by the debugger. */
3472 #define add_dynamic_entry(TAG, VAL) \
3473 bfd_elf32_add_dynamic_entry (info, (TAG), (VAL))
3474
3475 if (info->executable)
3476 {
3477 if (!add_dynamic_entry (DT_DEBUG, 0))
3478 return FALSE;
3479 }
3480
3481 if (htab->plt != NULL && htab->plt->_raw_size != 0)
3482 {
3483 if (!add_dynamic_entry (DT_PLTGOT, 0)
3484 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3485 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3486 || !add_dynamic_entry (DT_JMPREL, 0))
3487 return FALSE;
3488 }
3489
3490 if (relocs)
3491 {
3492 if (!add_dynamic_entry (DT_RELA, 0)
3493 || !add_dynamic_entry (DT_RELASZ, 0)
3494 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3495 return FALSE;
3496 }
3497
3498 /* If any dynamic relocs apply to a read-only section, then we
3499 need a DT_TEXTREL entry. */
3500 if ((info->flags & DF_TEXTREL) == 0)
3501 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
3502 info);
3503
3504 if ((info->flags & DF_TEXTREL) != 0)
3505 {
3506 if (!add_dynamic_entry (DT_TEXTREL, 0))
3507 return FALSE;
3508 }
3509 }
3510 #undef add_dynamic_entry
3511
3512 return TRUE;
3513 }
3514 \f
3515 static bfd_boolean
3516 update_local_sym_info (bfd *abfd,
3517 Elf_Internal_Shdr *symtab_hdr,
3518 unsigned long r_symndx,
3519 int tls_type)
3520 {
3521 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3522 char *local_got_tls_masks;
3523
3524 if (local_got_refcounts == NULL)
3525 {
3526 bfd_size_type size = symtab_hdr->sh_info;
3527
3528 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3529 local_got_refcounts = bfd_zalloc (abfd, size);
3530 if (local_got_refcounts == NULL)
3531 return FALSE;
3532 elf_local_got_refcounts (abfd) = local_got_refcounts;
3533 }
3534
3535 local_got_refcounts[r_symndx] += 1;
3536 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3537 local_got_tls_masks[r_symndx] |= tls_type;
3538 return TRUE;
3539 }
3540
3541 static void
3542 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3543 {
3544 (*_bfd_error_handler)
3545 (_("%s: relocation %s cannot be used when making a shared object"),
3546 bfd_archive_filename (abfd),
3547 ppc_elf_howto_table[r_type]->name);
3548 bfd_set_error (bfd_error_bad_value);
3549 }
3550
3551 /* Look through the relocs for a section during the first phase, and
3552 allocate space in the global offset table or procedure linkage
3553 table. */
3554
3555 static bfd_boolean
3556 ppc_elf_check_relocs (bfd *abfd,
3557 struct bfd_link_info *info,
3558 asection *sec,
3559 const Elf_Internal_Rela *relocs)
3560 {
3561 struct ppc_elf_link_hash_table *htab;
3562 Elf_Internal_Shdr *symtab_hdr;
3563 struct elf_link_hash_entry **sym_hashes;
3564 const Elf_Internal_Rela *rel;
3565 const Elf_Internal_Rela *rel_end;
3566 asection *sreloc;
3567
3568 if (info->relocatable)
3569 return TRUE;
3570
3571 #ifdef DEBUG
3572 fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n",
3573 bfd_get_section_name (abfd, sec),
3574 bfd_archive_filename (abfd));
3575 #endif
3576
3577 /* Initialize howto table if not already done. */
3578 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3579 ppc_elf_howto_init ();
3580
3581 /* Create the linker generated sections all the time so that the
3582 special symbols are created. */
3583 htab = ppc_elf_hash_table (info);
3584 if (htab->sdata == NULL)
3585 {
3586 htab->sdata = ppc_elf_create_linker_section (abfd, info,
3587 LINKER_SECTION_SDATA);
3588 if (htab->sdata == NULL)
3589 return FALSE;
3590 }
3591
3592 if (htab->sdata2 == NULL)
3593 {
3594 htab->sdata2 = ppc_elf_create_linker_section (abfd, info,
3595 LINKER_SECTION_SDATA2);
3596 if (htab->sdata2 == NULL)
3597 return FALSE;
3598 }
3599
3600 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3601 sym_hashes = elf_sym_hashes (abfd);
3602 sreloc = NULL;
3603
3604 rel_end = relocs + sec->reloc_count;
3605 for (rel = relocs; rel < rel_end; rel++)
3606 {
3607 unsigned long r_symndx;
3608 enum elf_ppc_reloc_type r_type;
3609 struct elf_link_hash_entry *h;
3610 int tls_type = 0;
3611
3612 r_symndx = ELF32_R_SYM (rel->r_info);
3613 if (r_symndx < symtab_hdr->sh_info)
3614 h = NULL;
3615 else
3616 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3617
3618 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3619 This shows up in particular in an R_PPC_ADDR32 in the eabi
3620 startup code. */
3621 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3622 {
3623 if (htab->got == NULL)
3624 {
3625 if (htab->elf.dynobj == NULL)
3626 htab->elf.dynobj = abfd;
3627 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3628 return FALSE;
3629 }
3630 }
3631
3632 r_type = ELF32_R_TYPE (rel->r_info);
3633 switch (r_type)
3634 {
3635 case R_PPC_GOT_TLSLD16:
3636 case R_PPC_GOT_TLSLD16_LO:
3637 case R_PPC_GOT_TLSLD16_HI:
3638 case R_PPC_GOT_TLSLD16_HA:
3639 htab->tlsld_got.refcount += 1;
3640 tls_type = TLS_TLS | TLS_LD;
3641 goto dogottls;
3642
3643 case R_PPC_GOT_TLSGD16:
3644 case R_PPC_GOT_TLSGD16_LO:
3645 case R_PPC_GOT_TLSGD16_HI:
3646 case R_PPC_GOT_TLSGD16_HA:
3647 tls_type = TLS_TLS | TLS_GD;
3648 goto dogottls;
3649
3650 case R_PPC_GOT_TPREL16:
3651 case R_PPC_GOT_TPREL16_LO:
3652 case R_PPC_GOT_TPREL16_HI:
3653 case R_PPC_GOT_TPREL16_HA:
3654 if (info->shared)
3655 info->flags |= DF_STATIC_TLS;
3656 tls_type = TLS_TLS | TLS_TPREL;
3657 goto dogottls;
3658
3659 case R_PPC_GOT_DTPREL16:
3660 case R_PPC_GOT_DTPREL16_LO:
3661 case R_PPC_GOT_DTPREL16_HI:
3662 case R_PPC_GOT_DTPREL16_HA:
3663 tls_type = TLS_TLS | TLS_DTPREL;
3664 dogottls:
3665 sec->has_tls_reloc = 1;
3666 /* Fall thru */
3667
3668 /* GOT16 relocations */
3669 case R_PPC_GOT16:
3670 case R_PPC_GOT16_LO:
3671 case R_PPC_GOT16_HI:
3672 case R_PPC_GOT16_HA:
3673 /* This symbol requires a global offset table entry. */
3674 if (htab->got == NULL)
3675 {
3676 if (htab->elf.dynobj == NULL)
3677 htab->elf.dynobj = abfd;
3678 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3679 return FALSE;
3680 }
3681 if (h != NULL)
3682 {
3683 h->got.refcount += 1;
3684 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3685 }
3686 else
3687 /* This is a global offset table entry for a local symbol. */
3688 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3689 return FALSE;
3690 break;
3691
3692 /* Indirect .sdata relocation. */
3693 case R_PPC_EMB_SDAI16:
3694 if (info->shared)
3695 {
3696 bad_shared_reloc (abfd, r_type);
3697 return FALSE;
3698 }
3699 if (!elf_create_pointer_linker_section (abfd, info,
3700 htab->sdata, h, rel))
3701 return FALSE;
3702 break;
3703
3704 /* Indirect .sdata2 relocation. */
3705 case R_PPC_EMB_SDA2I16:
3706 if (info->shared)
3707 {
3708 bad_shared_reloc (abfd, r_type);
3709 return FALSE;
3710 }
3711 if (!elf_create_pointer_linker_section (abfd, info,
3712 htab->sdata2, h, rel))
3713 return FALSE;
3714 break;
3715
3716 case R_PPC_SDAREL16:
3717 case R_PPC_EMB_SDA2REL:
3718 case R_PPC_EMB_SDA21:
3719 case R_PPC_EMB_RELSDA:
3720 case R_PPC_EMB_NADDR32:
3721 case R_PPC_EMB_NADDR16:
3722 case R_PPC_EMB_NADDR16_LO:
3723 case R_PPC_EMB_NADDR16_HI:
3724 case R_PPC_EMB_NADDR16_HA:
3725 if (info->shared)
3726 {
3727 bad_shared_reloc (abfd, r_type);
3728 return FALSE;
3729 }
3730 break;
3731
3732 case R_PPC_PLT32:
3733 case R_PPC_PLTREL24:
3734 case R_PPC_PLTREL32:
3735 case R_PPC_PLT16_LO:
3736 case R_PPC_PLT16_HI:
3737 case R_PPC_PLT16_HA:
3738 #ifdef DEBUG
3739 fprintf (stderr, "Reloc requires a PLT entry\n");
3740 #endif
3741 /* This symbol requires a procedure linkage table entry. We
3742 actually build the entry in finish_dynamic_symbol,
3743 because this might be a case of linking PIC code without
3744 linking in any dynamic objects, in which case we don't
3745 need to generate a procedure linkage table after all. */
3746
3747 if (h == NULL)
3748 {
3749 /* It does not make sense to have a procedure linkage
3750 table entry for a local symbol. */
3751 (*_bfd_error_handler) (_("%s(%s+0x%lx): %s reloc against "
3752 "local symbol"),
3753 bfd_archive_filename (abfd),
3754 sec->name,
3755 (long) rel->r_offset,
3756 ppc_elf_howto_table[r_type]->name);
3757 bfd_set_error (bfd_error_bad_value);
3758 return FALSE;
3759 }
3760
3761 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3762 h->plt.refcount++;
3763 break;
3764
3765 /* The following relocations don't need to propagate the
3766 relocation if linking a shared object since they are
3767 section relative. */
3768 case R_PPC_SECTOFF:
3769 case R_PPC_SECTOFF_LO:
3770 case R_PPC_SECTOFF_HI:
3771 case R_PPC_SECTOFF_HA:
3772 case R_PPC_DTPREL16:
3773 case R_PPC_DTPREL16_LO:
3774 case R_PPC_DTPREL16_HI:
3775 case R_PPC_DTPREL16_HA:
3776 case R_PPC_TOC16:
3777 break;
3778
3779 /* This are just markers. */
3780 case R_PPC_TLS:
3781 case R_PPC_EMB_MRKREF:
3782 case R_PPC_NONE:
3783 case R_PPC_max:
3784 break;
3785
3786 /* These should only appear in dynamic objects. */
3787 case R_PPC_COPY:
3788 case R_PPC_GLOB_DAT:
3789 case R_PPC_JMP_SLOT:
3790 case R_PPC_RELATIVE:
3791 break;
3792
3793 /* These aren't handled yet. We'll report an error later. */
3794 case R_PPC_ADDR30:
3795 case R_PPC_EMB_RELSEC16:
3796 case R_PPC_EMB_RELST_LO:
3797 case R_PPC_EMB_RELST_HI:
3798 case R_PPC_EMB_RELST_HA:
3799 case R_PPC_EMB_BIT_FLD:
3800 break;
3801
3802 /* This refers only to functions defined in the shared library. */
3803 case R_PPC_LOCAL24PC:
3804 break;
3805
3806 /* This relocation describes the C++ object vtable hierarchy.
3807 Reconstruct it for later use during GC. */
3808 case R_PPC_GNU_VTINHERIT:
3809 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3810 return FALSE;
3811 break;
3812
3813 /* This relocation describes which C++ vtable entries are actually
3814 used. Record for later use during GC. */
3815 case R_PPC_GNU_VTENTRY:
3816 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3817 return FALSE;
3818 break;
3819
3820 /* We shouldn't really be seeing these. */
3821 case R_PPC_TPREL32:
3822 if (info->shared)
3823 info->flags |= DF_STATIC_TLS;
3824 goto dodyn;
3825
3826 /* Nor these. */
3827 case R_PPC_DTPMOD32:
3828 case R_PPC_DTPREL32:
3829 goto dodyn;
3830
3831 case R_PPC_TPREL16:
3832 case R_PPC_TPREL16_LO:
3833 case R_PPC_TPREL16_HI:
3834 case R_PPC_TPREL16_HA:
3835 if (info->shared)
3836 info->flags |= DF_STATIC_TLS;
3837 goto dodyn;
3838
3839 /* When creating a shared object, we must copy these
3840 relocs into the output file. We create a reloc
3841 section in dynobj and make room for the reloc. */
3842 case R_PPC_REL24:
3843 case R_PPC_REL14:
3844 case R_PPC_REL14_BRTAKEN:
3845 case R_PPC_REL14_BRNTAKEN:
3846 case R_PPC_REL32:
3847 if (h == NULL
3848 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3849 break;
3850 /* fall through */
3851
3852 case R_PPC_ADDR32:
3853 case R_PPC_ADDR24:
3854 case R_PPC_ADDR16:
3855 case R_PPC_ADDR16_LO:
3856 case R_PPC_ADDR16_HI:
3857 case R_PPC_ADDR16_HA:
3858 case R_PPC_ADDR14:
3859 case R_PPC_ADDR14_BRTAKEN:
3860 case R_PPC_ADDR14_BRNTAKEN:
3861 case R_PPC_UADDR32:
3862 case R_PPC_UADDR16:
3863 if (h != NULL && !info->shared)
3864 {
3865 /* We may need a plt entry if the symbol turns out to be
3866 a function defined in a dynamic object. */
3867 h->plt.refcount++;
3868
3869 /* We may need a copy reloc too. */
3870 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3871 }
3872
3873 dodyn:
3874 /* If we are creating a shared library, and this is a reloc
3875 against a global symbol, or a non PC relative reloc
3876 against a local symbol, then we need to copy the reloc
3877 into the shared library. However, if we are linking with
3878 -Bsymbolic, we do not need to copy a reloc against a
3879 global symbol which is defined in an object we are
3880 including in the link (i.e., DEF_REGULAR is set). At
3881 this point we have not seen all the input files, so it is
3882 possible that DEF_REGULAR is not set now but will be set
3883 later (it is never cleared). In case of a weak definition,
3884 DEF_REGULAR may be cleared later by a strong definition in
3885 a shared library. We account for that possibility below by
3886 storing information in the dyn_relocs field of the hash
3887 table entry. A similar situation occurs when creating
3888 shared libraries and symbol visibility changes render the
3889 symbol local.
3890
3891 If on the other hand, we are creating an executable, we
3892 may need to keep relocations for symbols satisfied by a
3893 dynamic library if we manage to avoid copy relocs for the
3894 symbol. */
3895 if ((info->shared
3896 && (MUST_BE_DYN_RELOC (r_type)
3897 || (h != NULL
3898 && (! info->symbolic
3899 || h->root.type == bfd_link_hash_defweak
3900 || (h->elf_link_hash_flags
3901 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3902 || (ELIMINATE_COPY_RELOCS
3903 && !info->shared
3904 && (sec->flags & SEC_ALLOC) != 0
3905 && h != NULL
3906 && (h->root.type == bfd_link_hash_defweak
3907 || (h->elf_link_hash_flags
3908 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3909 {
3910 struct ppc_elf_dyn_relocs *p;
3911 struct ppc_elf_dyn_relocs **head;
3912
3913 #ifdef DEBUG
3914 fprintf (stderr,
3915 "ppc_elf_check_relocs needs to "
3916 "create relocation for %s\n",
3917 (h && h->root.root.string
3918 ? h->root.root.string : "<unknown>"));
3919 #endif
3920 if (sreloc == NULL)
3921 {
3922 const char *name;
3923
3924 name = (bfd_elf_string_from_elf_section
3925 (abfd,
3926 elf_elfheader (abfd)->e_shstrndx,
3927 elf_section_data (sec)->rel_hdr.sh_name));
3928 if (name == NULL)
3929 return FALSE;
3930
3931 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3932 && strcmp (bfd_get_section_name (abfd, sec),
3933 name + 5) == 0);
3934
3935 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3936 if (sreloc == NULL)
3937 {
3938 flagword flags;
3939
3940 sreloc = bfd_make_section (htab->elf.dynobj, name);
3941 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3942 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3943 if ((sec->flags & SEC_ALLOC) != 0)
3944 flags |= SEC_ALLOC | SEC_LOAD;
3945 if (sreloc == NULL
3946 || ! bfd_set_section_flags (htab->elf.dynobj,
3947 sreloc, flags)
3948 || ! bfd_set_section_alignment (htab->elf.dynobj,
3949 sreloc, 2))
3950 return FALSE;
3951 }
3952 elf_section_data (sec)->sreloc = sreloc;
3953 }
3954
3955 /* If this is a global symbol, we count the number of
3956 relocations we need for this symbol. */
3957 if (h != NULL)
3958 {
3959 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3960 }
3961 else
3962 {
3963 /* Track dynamic relocs needed for local syms too.
3964 We really need local syms available to do this
3965 easily. Oh well. */
3966
3967 asection *s;
3968 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3969 sec, r_symndx);
3970 if (s == NULL)
3971 return FALSE;
3972
3973 head = ((struct ppc_elf_dyn_relocs **)
3974 &elf_section_data (s)->local_dynrel);
3975 }
3976
3977 p = *head;
3978 if (p == NULL || p->sec != sec)
3979 {
3980 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3981 if (p == NULL)
3982 return FALSE;
3983 p->next = *head;
3984 *head = p;
3985 p->sec = sec;
3986 p->count = 0;
3987 p->pc_count = 0;
3988 }
3989
3990 p->count += 1;
3991 if (!MUST_BE_DYN_RELOC (r_type))
3992 p->pc_count += 1;
3993 }
3994
3995 break;
3996 }
3997 }
3998
3999 return TRUE;
4000 }
4001
4002 /* Return the section that should be marked against GC for a given
4003 relocation. */
4004
4005 static asection *
4006 ppc_elf_gc_mark_hook (asection *sec,
4007 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4008 Elf_Internal_Rela *rel,
4009 struct elf_link_hash_entry *h,
4010 Elf_Internal_Sym *sym)
4011 {
4012 if (h != NULL)
4013 {
4014 switch (ELF32_R_TYPE (rel->r_info))
4015 {
4016 case R_PPC_GNU_VTINHERIT:
4017 case R_PPC_GNU_VTENTRY:
4018 break;
4019
4020 default:
4021 switch (h->root.type)
4022 {
4023 case bfd_link_hash_defined:
4024 case bfd_link_hash_defweak:
4025 return h->root.u.def.section;
4026
4027 case bfd_link_hash_common:
4028 return h->root.u.c.p->section;
4029
4030 default:
4031 break;
4032 }
4033 }
4034 }
4035 else
4036 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4037
4038 return NULL;
4039 }
4040
4041 /* Update the got, plt and dynamic reloc reference counts for the
4042 section being removed. */
4043
4044 static bfd_boolean
4045 ppc_elf_gc_sweep_hook (bfd *abfd,
4046 struct bfd_link_info *info,
4047 asection *sec,
4048 const Elf_Internal_Rela *relocs)
4049 {
4050 struct ppc_elf_link_hash_table *htab;
4051 Elf_Internal_Shdr *symtab_hdr;
4052 struct elf_link_hash_entry **sym_hashes;
4053 bfd_signed_vma *local_got_refcounts;
4054 const Elf_Internal_Rela *rel, *relend;
4055
4056 elf_section_data (sec)->local_dynrel = NULL;
4057
4058 htab = ppc_elf_hash_table (info);
4059 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4060 sym_hashes = elf_sym_hashes (abfd);
4061 local_got_refcounts = elf_local_got_refcounts (abfd);
4062
4063 relend = relocs + sec->reloc_count;
4064 for (rel = relocs; rel < relend; rel++)
4065 {
4066 unsigned long r_symndx;
4067 enum elf_ppc_reloc_type r_type;
4068 struct elf_link_hash_entry *h = NULL;
4069
4070 r_symndx = ELF32_R_SYM (rel->r_info);
4071 if (r_symndx >= symtab_hdr->sh_info)
4072 {
4073 struct ppc_elf_dyn_relocs **pp, *p;
4074 struct ppc_elf_link_hash_entry *eh;
4075
4076 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4077 eh = (struct ppc_elf_link_hash_entry *) h;
4078
4079 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4080 if (p->sec == sec)
4081 {
4082 /* Everything must go for SEC. */
4083 *pp = p->next;
4084 break;
4085 }
4086 }
4087
4088 r_type = ELF32_R_TYPE (rel->r_info);
4089 switch (r_type)
4090 {
4091 case R_PPC_GOT_TLSLD16:
4092 case R_PPC_GOT_TLSLD16_LO:
4093 case R_PPC_GOT_TLSLD16_HI:
4094 case R_PPC_GOT_TLSLD16_HA:
4095 htab->tlsld_got.refcount -= 1;
4096 /* Fall thru */
4097
4098 case R_PPC_GOT_TLSGD16:
4099 case R_PPC_GOT_TLSGD16_LO:
4100 case R_PPC_GOT_TLSGD16_HI:
4101 case R_PPC_GOT_TLSGD16_HA:
4102 case R_PPC_GOT_TPREL16:
4103 case R_PPC_GOT_TPREL16_LO:
4104 case R_PPC_GOT_TPREL16_HI:
4105 case R_PPC_GOT_TPREL16_HA:
4106 case R_PPC_GOT_DTPREL16:
4107 case R_PPC_GOT_DTPREL16_LO:
4108 case R_PPC_GOT_DTPREL16_HI:
4109 case R_PPC_GOT_DTPREL16_HA:
4110 case R_PPC_GOT16:
4111 case R_PPC_GOT16_LO:
4112 case R_PPC_GOT16_HI:
4113 case R_PPC_GOT16_HA:
4114 if (h != NULL)
4115 {
4116 if (h->got.refcount > 0)
4117 h->got.refcount--;
4118 }
4119 else if (local_got_refcounts != NULL)
4120 {
4121 if (local_got_refcounts[r_symndx] > 0)
4122 local_got_refcounts[r_symndx]--;
4123 }
4124 break;
4125
4126 case R_PPC_REL24:
4127 case R_PPC_REL14:
4128 case R_PPC_REL14_BRTAKEN:
4129 case R_PPC_REL14_BRNTAKEN:
4130 case R_PPC_REL32:
4131 if (h == NULL
4132 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4133 break;
4134 /* Fall thru */
4135
4136 case R_PPC_ADDR32:
4137 case R_PPC_ADDR24:
4138 case R_PPC_ADDR16:
4139 case R_PPC_ADDR16_LO:
4140 case R_PPC_ADDR16_HI:
4141 case R_PPC_ADDR16_HA:
4142 case R_PPC_ADDR14:
4143 case R_PPC_ADDR14_BRTAKEN:
4144 case R_PPC_ADDR14_BRNTAKEN:
4145 case R_PPC_UADDR32:
4146 case R_PPC_UADDR16:
4147 case R_PPC_PLT32:
4148 case R_PPC_PLTREL24:
4149 case R_PPC_PLT16_LO:
4150 case R_PPC_PLT16_HI:
4151 case R_PPC_PLT16_HA:
4152 if (h != NULL)
4153 {
4154 if (h->plt.refcount > 0)
4155 h->plt.refcount--;
4156 }
4157 break;
4158
4159 default:
4160 break;
4161 }
4162 }
4163 return TRUE;
4164 }
4165
4166 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4167
4168 asection *
4169 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4170 {
4171 struct ppc_elf_link_hash_table *htab;
4172
4173 htab = ppc_elf_hash_table (info);
4174 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4175 FALSE, FALSE, TRUE);
4176
4177 return _bfd_elf_tls_setup (obfd, info);
4178 }
4179
4180 /* Run through all the TLS relocs looking for optimization
4181 opportunities. */
4182
4183 bfd_boolean
4184 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4185 struct bfd_link_info *info)
4186 {
4187 bfd *ibfd;
4188 asection *sec;
4189 struct ppc_elf_link_hash_table *htab;
4190
4191 if (info->relocatable || info->shared)
4192 return TRUE;
4193
4194 htab = ppc_elf_hash_table (info);
4195 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4196 {
4197 Elf_Internal_Sym *locsyms = NULL;
4198 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4199
4200 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4201 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4202 {
4203 Elf_Internal_Rela *relstart, *rel, *relend;
4204 int expecting_tls_get_addr;
4205
4206 /* Read the relocations. */
4207 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4208 info->keep_memory);
4209 if (relstart == NULL)
4210 return FALSE;
4211
4212 expecting_tls_get_addr = 0;
4213 relend = relstart + sec->reloc_count;
4214 for (rel = relstart; rel < relend; rel++)
4215 {
4216 enum elf_ppc_reloc_type r_type;
4217 unsigned long r_symndx;
4218 struct elf_link_hash_entry *h = NULL;
4219 char *tls_mask;
4220 char tls_set, tls_clear;
4221 bfd_boolean is_local;
4222
4223 r_symndx = ELF32_R_SYM (rel->r_info);
4224 if (r_symndx >= symtab_hdr->sh_info)
4225 {
4226 struct elf_link_hash_entry **sym_hashes;
4227
4228 sym_hashes = elf_sym_hashes (ibfd);
4229 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4230 while (h->root.type == bfd_link_hash_indirect
4231 || h->root.type == bfd_link_hash_warning)
4232 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4233 }
4234
4235 is_local = FALSE;
4236 if (h == NULL
4237 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
4238 is_local = TRUE;
4239
4240 r_type = ELF32_R_TYPE (rel->r_info);
4241 switch (r_type)
4242 {
4243 case R_PPC_GOT_TLSLD16:
4244 case R_PPC_GOT_TLSLD16_LO:
4245 case R_PPC_GOT_TLSLD16_HI:
4246 case R_PPC_GOT_TLSLD16_HA:
4247 /* These relocs should never be against a symbol
4248 defined in a shared lib. Leave them alone if
4249 that turns out to be the case. */
4250 expecting_tls_get_addr = 0;
4251 htab->tlsld_got.refcount -= 1;
4252 if (!is_local)
4253 continue;
4254
4255 /* LD -> LE */
4256 tls_set = 0;
4257 tls_clear = TLS_LD;
4258 expecting_tls_get_addr = 1;
4259 break;
4260
4261 case R_PPC_GOT_TLSGD16:
4262 case R_PPC_GOT_TLSGD16_LO:
4263 case R_PPC_GOT_TLSGD16_HI:
4264 case R_PPC_GOT_TLSGD16_HA:
4265 if (is_local)
4266 /* GD -> LE */
4267 tls_set = 0;
4268 else
4269 /* GD -> IE */
4270 tls_set = TLS_TLS | TLS_TPRELGD;
4271 tls_clear = TLS_GD;
4272 expecting_tls_get_addr = 1;
4273 break;
4274
4275 case R_PPC_GOT_TPREL16:
4276 case R_PPC_GOT_TPREL16_LO:
4277 case R_PPC_GOT_TPREL16_HI:
4278 case R_PPC_GOT_TPREL16_HA:
4279 expecting_tls_get_addr = 0;
4280 if (is_local)
4281 {
4282 /* IE -> LE */
4283 tls_set = 0;
4284 tls_clear = TLS_TPREL;
4285 break;
4286 }
4287 else
4288 continue;
4289
4290 case R_PPC_REL14:
4291 case R_PPC_REL14_BRTAKEN:
4292 case R_PPC_REL14_BRNTAKEN:
4293 case R_PPC_REL24:
4294 if (expecting_tls_get_addr
4295 && h != NULL
4296 && h == htab->tls_get_addr)
4297 {
4298 if (h->plt.refcount > 0)
4299 h->plt.refcount -= 1;
4300 }
4301 expecting_tls_get_addr = 0;
4302 continue;
4303
4304 default:
4305 expecting_tls_get_addr = 0;
4306 continue;
4307 }
4308
4309 if (h != NULL)
4310 {
4311 if (tls_set == 0)
4312 {
4313 /* We managed to get rid of a got entry. */
4314 if (h->got.refcount > 0)
4315 h->got.refcount -= 1;
4316 }
4317 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4318 }
4319 else
4320 {
4321 Elf_Internal_Sym *sym;
4322 bfd_signed_vma *lgot_refs;
4323 char *lgot_masks;
4324
4325 if (locsyms == NULL)
4326 {
4327 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4328 if (locsyms == NULL)
4329 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4330 symtab_hdr->sh_info,
4331 0, NULL, NULL, NULL);
4332 if (locsyms == NULL)
4333 {
4334 if (elf_section_data (sec)->relocs != relstart)
4335 free (relstart);
4336 return FALSE;
4337 }
4338 }
4339 sym = locsyms + r_symndx;
4340 lgot_refs = elf_local_got_refcounts (ibfd);
4341 if (lgot_refs == NULL)
4342 abort ();
4343 if (tls_set == 0)
4344 {
4345 /* We managed to get rid of a got entry. */
4346 if (lgot_refs[r_symndx] > 0)
4347 lgot_refs[r_symndx] -= 1;
4348 }
4349 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4350 tls_mask = &lgot_masks[r_symndx];
4351 }
4352
4353 *tls_mask |= tls_set;
4354 *tls_mask &= ~tls_clear;
4355 }
4356
4357 if (elf_section_data (sec)->relocs != relstart)
4358 free (relstart);
4359 }
4360
4361 if (locsyms != NULL
4362 && (symtab_hdr->contents != (unsigned char *) locsyms))
4363 {
4364 if (!info->keep_memory)
4365 free (locsyms);
4366 else
4367 symtab_hdr->contents = (unsigned char *) locsyms;
4368 }
4369 }
4370 return TRUE;
4371 }
4372 \f
4373 /* Hook called by the linker routine which adds symbols from an object
4374 file. We use it to put .comm items in .sbss, and not .bss. */
4375
4376 static bfd_boolean
4377 ppc_elf_add_symbol_hook (bfd *abfd,
4378 struct bfd_link_info *info,
4379 const Elf_Internal_Sym *sym,
4380 const char **namep ATTRIBUTE_UNUSED,
4381 flagword *flagsp ATTRIBUTE_UNUSED,
4382 asection **secp,
4383 bfd_vma *valp)
4384 {
4385 if (sym->st_shndx == SHN_COMMON
4386 && !info->relocatable
4387 && sym->st_size <= elf_gp_size (abfd)
4388 && (info->hash->creator == abfd->xvec
4389 || info->hash->creator == abfd->xvec->alternative_target))
4390 {
4391 /* Common symbols less than or equal to -G nn bytes are automatically
4392 put into .sbss. */
4393 struct ppc_elf_link_hash_table *htab;
4394
4395 htab = ppc_elf_hash_table (info);
4396 if (htab->sbss == NULL)
4397 {
4398 flagword flags = SEC_IS_COMMON;
4399
4400 htab->sbss = bfd_make_section_anyway (abfd, ".sbss");
4401 if (htab->sbss == NULL
4402 || ! bfd_set_section_flags (abfd, htab->sbss, flags))
4403 return FALSE;
4404 }
4405
4406 *secp = htab->sbss;
4407 *valp = sym->st_size;
4408 }
4409
4410 return TRUE;
4411 }
4412 \f
4413 /* Finish up dynamic symbol handling. We set the contents of various
4414 dynamic sections here. */
4415
4416 static bfd_boolean
4417 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
4418 struct bfd_link_info *info,
4419 struct elf_link_hash_entry *h,
4420 Elf_Internal_Sym *sym)
4421 {
4422 struct ppc_elf_link_hash_table *htab;
4423
4424 #ifdef DEBUG
4425 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
4426 h->root.root.string);
4427 #endif
4428
4429 htab = ppc_elf_hash_table (info);
4430 BFD_ASSERT (htab->elf.dynobj != NULL);
4431
4432 if (h->plt.offset != (bfd_vma) -1)
4433 {
4434 Elf_Internal_Rela rela;
4435 bfd_byte *loc;
4436 bfd_vma reloc_index;
4437
4438 #ifdef DEBUG
4439 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
4440 #endif
4441
4442 /* This symbol has an entry in the procedure linkage table. Set
4443 it up. */
4444
4445 BFD_ASSERT (h->dynindx != -1);
4446 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
4447
4448 /* We don't need to fill in the .plt. The ppc dynamic linker
4449 will fill it in. */
4450
4451 /* Fill in the entry in the .rela.plt section. */
4452 rela.r_offset = (htab->plt->output_section->vma
4453 + htab->plt->output_offset
4454 + h->plt.offset);
4455 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
4456 rela.r_addend = 0;
4457
4458 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
4459 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
4460 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
4461 loc = (htab->relplt->contents
4462 + reloc_index * sizeof (Elf32_External_Rela));
4463 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4464
4465 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4466 {
4467 /* Mark the symbol as undefined, rather than as defined in
4468 the .plt section. Leave the value alone. */
4469 sym->st_shndx = SHN_UNDEF;
4470 /* If the symbol is weak, we do need to clear the value.
4471 Otherwise, the PLT entry would provide a definition for
4472 the symbol even if the symbol wasn't defined anywhere,
4473 and so the symbol would never be NULL. */
4474 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
4475 == 0)
4476 sym->st_value = 0;
4477 }
4478 }
4479
4480 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4481 {
4482 asection *s;
4483 Elf_Internal_Rela rela;
4484 bfd_byte *loc;
4485
4486 /* This symbols needs a copy reloc. Set it up. */
4487
4488 #ifdef DEBUG
4489 fprintf (stderr, ", copy");
4490 #endif
4491
4492 BFD_ASSERT (h->dynindx != -1);
4493
4494 if (h->size <= elf_gp_size (htab->elf.dynobj))
4495 s = htab->relsbss;
4496 else
4497 s = htab->relbss;
4498 BFD_ASSERT (s != NULL);
4499
4500 rela.r_offset = (h->root.u.def.value
4501 + h->root.u.def.section->output_section->vma
4502 + h->root.u.def.section->output_offset);
4503 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
4504 rela.r_addend = 0;
4505 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4506 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4507 }
4508
4509 #ifdef DEBUG
4510 fprintf (stderr, "\n");
4511 #endif
4512
4513 /* Mark some specially defined symbols as absolute. */
4514 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4515 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
4516 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
4517 sym->st_shndx = SHN_ABS;
4518
4519 return TRUE;
4520 }
4521 \f
4522 /* Finish up the dynamic sections. */
4523
4524 static bfd_boolean
4525 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
4526 struct bfd_link_info *info)
4527 {
4528 asection *sdyn;
4529 struct ppc_elf_link_hash_table *htab;
4530
4531 #ifdef DEBUG
4532 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
4533 #endif
4534
4535 htab = ppc_elf_hash_table (info);
4536 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
4537
4538 if (htab->elf.dynamic_sections_created)
4539 {
4540 Elf32_External_Dyn *dyncon, *dynconend;
4541
4542 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
4543
4544 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4545 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4546 for (; dyncon < dynconend; dyncon++)
4547 {
4548 Elf_Internal_Dyn dyn;
4549 asection *s;
4550
4551 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
4552
4553 switch (dyn.d_tag)
4554 {
4555 case DT_PLTGOT:
4556 s = htab->plt;
4557 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4558 break;
4559
4560 case DT_PLTRELSZ:
4561 dyn.d_un.d_val = htab->relplt->_raw_size;
4562 break;
4563
4564 case DT_JMPREL:
4565 s = htab->relplt;
4566 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4567 break;
4568
4569 default:
4570 continue;
4571 }
4572
4573 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4574 }
4575 }
4576
4577 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
4578 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
4579 if (htab->got)
4580 {
4581 unsigned char *contents = htab->got->contents;
4582 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
4583
4584 if (sdyn == NULL)
4585 bfd_put_32 (output_bfd, 0, contents + 4);
4586 else
4587 bfd_put_32 (output_bfd,
4588 sdyn->output_section->vma + sdyn->output_offset,
4589 contents + 4);
4590
4591 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
4592 }
4593
4594 return TRUE;
4595 }
4596 \f
4597 /* The RELOCATE_SECTION function is called by the ELF backend linker
4598 to handle the relocations for a section.
4599
4600 The relocs are always passed as Rela structures; if the section
4601 actually uses Rel structures, the r_addend field will always be
4602 zero.
4603
4604 This function is responsible for adjust the section contents as
4605 necessary, and (if using Rela relocs and generating a
4606 relocatable output file) adjusting the reloc addend as
4607 necessary.
4608
4609 This function does not have to worry about setting the reloc
4610 address or the reloc symbol index.
4611
4612 LOCAL_SYMS is a pointer to the swapped in local symbols.
4613
4614 LOCAL_SECTIONS is an array giving the section in the input file
4615 corresponding to the st_shndx field of each local symbol.
4616
4617 The global hash table entry for the global symbols can be found
4618 via elf_sym_hashes (input_bfd).
4619
4620 When generating relocatable output, this function must handle
4621 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
4622 going to be the section symbol corresponding to the output
4623 section, which means that the addend must be adjusted
4624 accordingly. */
4625
4626 static bfd_boolean
4627 ppc_elf_relocate_section (bfd *output_bfd,
4628 struct bfd_link_info *info,
4629 bfd *input_bfd,
4630 asection *input_section,
4631 bfd_byte *contents,
4632 Elf_Internal_Rela *relocs,
4633 Elf_Internal_Sym *local_syms,
4634 asection **local_sections)
4635 {
4636 Elf_Internal_Shdr *symtab_hdr;
4637 struct elf_link_hash_entry **sym_hashes;
4638 struct ppc_elf_link_hash_table *htab;
4639 Elf_Internal_Rela *rel;
4640 Elf_Internal_Rela *relend;
4641 Elf_Internal_Rela outrel;
4642 bfd_byte *loc;
4643 asection *sreloc = NULL;
4644 bfd_vma *local_got_offsets;
4645 bfd_boolean ret = TRUE;
4646
4647 #ifdef DEBUG
4648 fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, "
4649 "%ld relocations%s\n",
4650 bfd_archive_filename (input_bfd),
4651 bfd_section_name(input_bfd, input_section),
4652 (long) input_section->reloc_count,
4653 (info->relocatable) ? " (relocatable)" : "");
4654 #endif
4655
4656 if (info->relocatable)
4657 return TRUE;
4658
4659 /* Initialize howto table if not already done. */
4660 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4661 ppc_elf_howto_init ();
4662
4663 htab = ppc_elf_hash_table (info);
4664 local_got_offsets = elf_local_got_offsets (input_bfd);
4665 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4666 sym_hashes = elf_sym_hashes (input_bfd);
4667 rel = relocs;
4668 relend = relocs + input_section->reloc_count;
4669 for (; rel < relend; rel++)
4670 {
4671 enum elf_ppc_reloc_type r_type;
4672 bfd_vma addend;
4673 bfd_reloc_status_type r;
4674 Elf_Internal_Sym *sym;
4675 asection *sec;
4676 struct elf_link_hash_entry *h;
4677 const char *sym_name;
4678 reloc_howto_type *howto;
4679 unsigned long r_symndx;
4680 bfd_vma relocation;
4681 bfd_vma branch_bit, insn, from;
4682 bfd_boolean unresolved_reloc;
4683 bfd_boolean warned;
4684 unsigned int tls_type, tls_mask, tls_gd;
4685
4686 r_type = ELF32_R_TYPE (rel->r_info);
4687 sym = NULL;
4688 sec = NULL;
4689 h = NULL;
4690 unresolved_reloc = FALSE;
4691 warned = FALSE;
4692 r_symndx = ELF32_R_SYM (rel->r_info);
4693
4694 if (r_symndx < symtab_hdr->sh_info)
4695 {
4696 sym = local_syms + r_symndx;
4697 sec = local_sections[r_symndx];
4698 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
4699
4700 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4701 }
4702 else
4703 {
4704 RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
4705 symtab_hdr, relocation, sec,
4706 unresolved_reloc, info,
4707 warned);
4708
4709 sym_name = h->root.root.string;
4710 }
4711
4712 /* TLS optimizations. Replace instruction sequences and relocs
4713 based on information we collected in tls_optimize. We edit
4714 RELOCS so that --emit-relocs will output something sensible
4715 for the final instruction stream. */
4716 tls_mask = 0;
4717 tls_gd = 0;
4718 if (IS_PPC_TLS_RELOC (r_type))
4719 {
4720 if (h != NULL)
4721 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
4722 else if (local_got_offsets != NULL)
4723 {
4724 char *lgot_masks;
4725 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
4726 tls_mask = lgot_masks[r_symndx];
4727 }
4728 }
4729
4730 /* Ensure reloc mapping code below stays sane. */
4731 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
4732 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
4733 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
4734 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
4735 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
4736 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
4737 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
4738 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
4739 abort ();
4740 switch (r_type)
4741 {
4742 default:
4743 break;
4744
4745 case R_PPC_GOT_TPREL16:
4746 case R_PPC_GOT_TPREL16_LO:
4747 if (tls_mask != 0
4748 && (tls_mask & TLS_TPREL) == 0)
4749 {
4750 bfd_vma insn;
4751 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
4752 insn &= 31 << 21;
4753 insn |= 0x3c020000; /* addis 0,2,0 */
4754 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
4755 r_type = R_PPC_TPREL16_HA;
4756 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4757 }
4758 break;
4759
4760 case R_PPC_TLS:
4761 if (tls_mask != 0
4762 && (tls_mask & TLS_TPREL) == 0)
4763 {
4764 bfd_vma insn, rtra;
4765 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4766 if ((insn & ((31 << 26) | (31 << 11)))
4767 == ((31 << 26) | (2 << 11)))
4768 rtra = insn & ((1 << 26) - (1 << 16));
4769 else if ((insn & ((31 << 26) | (31 << 16)))
4770 == ((31 << 26) | (2 << 16)))
4771 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
4772 else
4773 abort ();
4774 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
4775 /* add -> addi. */
4776 insn = 14 << 26;
4777 else if ((insn & (31 << 1)) == 23 << 1
4778 && ((insn & (31 << 6)) < 14 << 6
4779 || ((insn & (31 << 6)) >= 16 << 6
4780 && (insn & (31 << 6)) < 24 << 6)))
4781 /* load and store indexed -> dform. */
4782 insn = (32 | ((insn >> 6) & 31)) << 26;
4783 else if ((insn & (31 << 1)) == 21 << 1
4784 && (insn & (0x1a << 6)) == 0)
4785 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
4786 insn = (((58 | ((insn >> 6) & 4)) << 26)
4787 | ((insn >> 6) & 1));
4788 else if ((insn & (31 << 1)) == 21 << 1
4789 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
4790 /* lwax -> lwa. */
4791 insn = (58 << 26) | 2;
4792 else
4793 abort ();
4794 insn |= rtra;
4795 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4796 r_type = R_PPC_TPREL16_LO;
4797 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4798 /* Was PPC_TLS which sits on insn boundary, now
4799 PPC_TPREL16_LO which is at insn+2. */
4800 rel->r_offset += 2;
4801 }
4802 break;
4803
4804 case R_PPC_GOT_TLSGD16_HI:
4805 case R_PPC_GOT_TLSGD16_HA:
4806 tls_gd = TLS_TPRELGD;
4807 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4808 goto tls_gdld_hi;
4809 break;
4810
4811 case R_PPC_GOT_TLSLD16_HI:
4812 case R_PPC_GOT_TLSLD16_HA:
4813 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4814 {
4815 tls_gdld_hi:
4816 if ((tls_mask & tls_gd) != 0)
4817 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4818 + R_PPC_GOT_TPREL16);
4819 else
4820 {
4821 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
4822 rel->r_offset -= 2;
4823 r_type = R_PPC_NONE;
4824 }
4825 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4826 }
4827 break;
4828
4829 case R_PPC_GOT_TLSGD16:
4830 case R_PPC_GOT_TLSGD16_LO:
4831 tls_gd = TLS_TPRELGD;
4832 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4833 goto tls_get_addr_check;
4834 break;
4835
4836 case R_PPC_GOT_TLSLD16:
4837 case R_PPC_GOT_TLSLD16_LO:
4838 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4839 {
4840 tls_get_addr_check:
4841 if (rel + 1 < relend)
4842 {
4843 enum elf_ppc_reloc_type r_type2;
4844 unsigned long r_symndx2;
4845 struct elf_link_hash_entry *h2;
4846 bfd_vma insn1, insn2;
4847 bfd_vma offset;
4848
4849 /* The next instruction should be a call to
4850 __tls_get_addr. Peek at the reloc to be sure. */
4851 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4852 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4853 if (r_symndx2 < symtab_hdr->sh_info
4854 || (r_type2 != R_PPC_REL14
4855 && r_type2 != R_PPC_REL14_BRTAKEN
4856 && r_type2 != R_PPC_REL14_BRNTAKEN
4857 && r_type2 != R_PPC_REL24
4858 && r_type2 != R_PPC_PLTREL24))
4859 break;
4860
4861 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4862 while (h2->root.type == bfd_link_hash_indirect
4863 || h2->root.type == bfd_link_hash_warning)
4864 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
4865 if (h2 == NULL || h2 != htab->tls_get_addr)
4866 break;
4867
4868 /* OK, it checks out. Replace the call. */
4869 offset = rel[1].r_offset;
4870 insn1 = bfd_get_32 (output_bfd,
4871 contents + rel->r_offset - 2);
4872 if ((tls_mask & tls_gd) != 0)
4873 {
4874 /* IE */
4875 insn1 &= (1 << 26) - 1;
4876 insn1 |= 32 << 26; /* lwz */
4877 insn2 = 0x7c631214; /* add 3,3,2 */
4878 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
4879 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4880 + R_PPC_GOT_TPREL16);
4881 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4882 }
4883 else
4884 {
4885 /* LE */
4886 insn1 = 0x3c620000; /* addis 3,2,0 */
4887 insn2 = 0x38630000; /* addi 3,3,0 */
4888 if (tls_gd == 0)
4889 {
4890 /* Was an LD reloc. */
4891 r_symndx = 0;
4892 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4893 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4894 }
4895 r_type = R_PPC_TPREL16_HA;
4896 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4897 rel[1].r_info = ELF32_R_INFO (r_symndx,
4898 R_PPC_TPREL16_LO);
4899 rel[1].r_offset += 2;
4900 }
4901 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
4902 bfd_put_32 (output_bfd, insn2, contents + offset);
4903 if (tls_gd == 0)
4904 {
4905 /* We changed the symbol on an LD reloc. Start over
4906 in order to get h, sym, sec etc. right. */
4907 rel--;
4908 continue;
4909 }
4910 }
4911 }
4912 break;
4913 }
4914
4915 /* Handle other relocations that tweak non-addend part of insn. */
4916 branch_bit = 0;
4917 switch (r_type)
4918 {
4919 default:
4920 break;
4921
4922 /* Branch taken prediction relocations. */
4923 case R_PPC_ADDR14_BRTAKEN:
4924 case R_PPC_REL14_BRTAKEN:
4925 branch_bit = BRANCH_PREDICT_BIT;
4926 /* Fall thru */
4927
4928 /* Branch not taken prediction relocations. */
4929 case R_PPC_ADDR14_BRNTAKEN:
4930 case R_PPC_REL14_BRNTAKEN:
4931 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4932 insn &= ~BRANCH_PREDICT_BIT;
4933 insn |= branch_bit;
4934
4935 from = (rel->r_offset
4936 + input_section->output_offset
4937 + input_section->output_section->vma);
4938
4939 /* Invert 'y' bit if not the default. */
4940 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
4941 insn ^= BRANCH_PREDICT_BIT;
4942
4943 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4944 break;
4945 }
4946
4947 addend = rel->r_addend;
4948 tls_type = 0;
4949 howto = NULL;
4950 if (r_type < R_PPC_max)
4951 howto = ppc_elf_howto_table[r_type];
4952 switch (r_type)
4953 {
4954 default:
4955 (*_bfd_error_handler)
4956 (_("%s: unknown relocation type %d for symbol %s"),
4957 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
4958
4959 bfd_set_error (bfd_error_bad_value);
4960 ret = FALSE;
4961 continue;
4962
4963 case R_PPC_NONE:
4964 case R_PPC_TLS:
4965 case R_PPC_EMB_MRKREF:
4966 case R_PPC_GNU_VTINHERIT:
4967 case R_PPC_GNU_VTENTRY:
4968 continue;
4969
4970 /* GOT16 relocations. Like an ADDR16 using the symbol's
4971 address in the GOT as relocation value instead of the
4972 symbol's value itself. Also, create a GOT entry for the
4973 symbol and put the symbol value there. */
4974 case R_PPC_GOT_TLSGD16:
4975 case R_PPC_GOT_TLSGD16_LO:
4976 case R_PPC_GOT_TLSGD16_HI:
4977 case R_PPC_GOT_TLSGD16_HA:
4978 tls_type = TLS_TLS | TLS_GD;
4979 goto dogot;
4980
4981 case R_PPC_GOT_TLSLD16:
4982 case R_PPC_GOT_TLSLD16_LO:
4983 case R_PPC_GOT_TLSLD16_HI:
4984 case R_PPC_GOT_TLSLD16_HA:
4985 tls_type = TLS_TLS | TLS_LD;
4986 goto dogot;
4987
4988 case R_PPC_GOT_TPREL16:
4989 case R_PPC_GOT_TPREL16_LO:
4990 case R_PPC_GOT_TPREL16_HI:
4991 case R_PPC_GOT_TPREL16_HA:
4992 tls_type = TLS_TLS | TLS_TPREL;
4993 goto dogot;
4994
4995 case R_PPC_GOT_DTPREL16:
4996 case R_PPC_GOT_DTPREL16_LO:
4997 case R_PPC_GOT_DTPREL16_HI:
4998 case R_PPC_GOT_DTPREL16_HA:
4999 tls_type = TLS_TLS | TLS_DTPREL;
5000 goto dogot;
5001
5002 case R_PPC_GOT16:
5003 case R_PPC_GOT16_LO:
5004 case R_PPC_GOT16_HI:
5005 case R_PPC_GOT16_HA:
5006 dogot:
5007 {
5008 /* Relocation is to the entry for this symbol in the global
5009 offset table. */
5010 bfd_vma off;
5011 bfd_vma *offp;
5012 unsigned long indx;
5013
5014 if (htab->got == NULL)
5015 abort ();
5016
5017 indx = 0;
5018 if (tls_type == (TLS_TLS | TLS_LD)
5019 && (h == NULL
5020 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
5021 offp = &htab->tlsld_got.offset;
5022 else if (h != NULL)
5023 {
5024 bfd_boolean dyn;
5025 dyn = htab->elf.dynamic_sections_created;
5026 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5027 || (info->shared
5028 && SYMBOL_REFERENCES_LOCAL (info, h)))
5029 /* This is actually a static link, or it is a
5030 -Bsymbolic link and the symbol is defined
5031 locally, or the symbol was forced to be local
5032 because of a version file. */
5033 ;
5034 else
5035 {
5036 indx = h->dynindx;
5037 unresolved_reloc = FALSE;
5038 }
5039 offp = &h->got.offset;
5040 }
5041 else
5042 {
5043 if (local_got_offsets == NULL)
5044 abort ();
5045 offp = &local_got_offsets[r_symndx];
5046 }
5047
5048 /* The offset must always be a multiple of 4. We use the
5049 least significant bit to record whether we have already
5050 processed this entry. */
5051 off = *offp;
5052 if ((off & 1) != 0)
5053 off &= ~1;
5054 else
5055 {
5056 unsigned int tls_m = (tls_mask
5057 & (TLS_LD | TLS_GD | TLS_DTPREL
5058 | TLS_TPREL | TLS_TPRELGD));
5059
5060 if (offp == &htab->tlsld_got.offset)
5061 tls_m = TLS_LD;
5062 else if (h == NULL
5063 || !(h->elf_link_hash_flags
5064 & ELF_LINK_HASH_DEF_DYNAMIC))
5065 tls_m &= ~TLS_LD;
5066
5067 /* We might have multiple got entries for this sym.
5068 Initialize them all. */
5069 do
5070 {
5071 int tls_ty = 0;
5072
5073 if ((tls_m & TLS_LD) != 0)
5074 {
5075 tls_ty = TLS_TLS | TLS_LD;
5076 tls_m &= ~TLS_LD;
5077 }
5078 else if ((tls_m & TLS_GD) != 0)
5079 {
5080 tls_ty = TLS_TLS | TLS_GD;
5081 tls_m &= ~TLS_GD;
5082 }
5083 else if ((tls_m & TLS_DTPREL) != 0)
5084 {
5085 tls_ty = TLS_TLS | TLS_DTPREL;
5086 tls_m &= ~TLS_DTPREL;
5087 }
5088 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5089 {
5090 tls_ty = TLS_TLS | TLS_TPREL;
5091 tls_m = 0;
5092 }
5093
5094 /* Generate relocs for the dynamic linker. */
5095 if ((info->shared || indx != 0)
5096 && (h == NULL
5097 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5098 || h->root.type != bfd_link_hash_undefweak))
5099 {
5100 outrel.r_offset = (htab->got->output_section->vma
5101 + htab->got->output_offset
5102 + off);
5103 outrel.r_addend = 0;
5104 if (tls_ty & (TLS_LD | TLS_GD))
5105 {
5106 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5107 if (tls_ty == (TLS_TLS | TLS_GD))
5108 {
5109 loc = htab->relgot->contents;
5110 loc += (htab->relgot->reloc_count++
5111 * sizeof (Elf32_External_Rela));
5112 bfd_elf32_swap_reloca_out (output_bfd,
5113 &outrel, loc);
5114 outrel.r_offset += 4;
5115 outrel.r_info
5116 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5117 }
5118 }
5119 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5120 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5121 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5122 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5123 else if (indx == 0)
5124 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5125 else
5126 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5127 if (indx == 0)
5128 {
5129 outrel.r_addend += relocation;
5130 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5131 outrel.r_addend -= htab->elf.tls_sec->vma;
5132 }
5133 loc = htab->relgot->contents;
5134 loc += (htab->relgot->reloc_count++
5135 * sizeof (Elf32_External_Rela));
5136 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5137 }
5138
5139 /* Init the .got section contents if we're not
5140 emitting a reloc. */
5141 else
5142 {
5143 bfd_vma value = relocation;
5144
5145 if (tls_ty == (TLS_TLS | TLS_LD))
5146 value = 1;
5147 else if (tls_ty != 0)
5148 {
5149 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
5150 if (tls_ty == (TLS_TLS | TLS_TPREL))
5151 value += DTP_OFFSET - TP_OFFSET;
5152
5153 if (tls_ty == (TLS_TLS | TLS_GD))
5154 {
5155 bfd_put_32 (output_bfd, value,
5156 htab->got->contents + off + 4);
5157 value = 1;
5158 }
5159 }
5160 bfd_put_32 (output_bfd, value,
5161 htab->got->contents + off);
5162 }
5163
5164 off += 4;
5165 if (tls_ty & (TLS_LD | TLS_GD))
5166 off += 4;
5167 }
5168 while (tls_m != 0);
5169
5170 off = *offp;
5171 *offp = off | 1;
5172 }
5173
5174 if (off >= (bfd_vma) -2)
5175 abort ();
5176
5177 if ((tls_type & TLS_TLS) != 0)
5178 {
5179 if (tls_type != (TLS_TLS | TLS_LD))
5180 {
5181 if ((tls_mask & TLS_LD) != 0
5182 && !(h == NULL
5183 || !(h->elf_link_hash_flags
5184 & ELF_LINK_HASH_DEF_DYNAMIC)))
5185 off += 8;
5186 if (tls_type != (TLS_TLS | TLS_GD))
5187 {
5188 if ((tls_mask & TLS_GD) != 0)
5189 off += 8;
5190 if (tls_type != (TLS_TLS | TLS_DTPREL))
5191 {
5192 if ((tls_mask & TLS_DTPREL) != 0)
5193 off += 4;
5194 }
5195 }
5196 }
5197 }
5198
5199 relocation = htab->got->output_offset + off - 4;
5200
5201 /* Addends on got relocations don't make much sense.
5202 x+off@got is actually x@got+off, and since the got is
5203 generated by a hash table traversal, the value in the
5204 got at entry m+n bears little relation to the entry m. */
5205 if (addend != 0)
5206 (*_bfd_error_handler)
5207 (_("%s(%s+0x%lx): non-zero addend on %s reloc against `%s'"),
5208 bfd_archive_filename (input_bfd),
5209 bfd_get_section_name (input_bfd, input_section),
5210 (long) rel->r_offset,
5211 howto->name,
5212 sym_name);
5213 }
5214 break;
5215
5216 /* Relocations that need no special processing. */
5217 case R_PPC_LOCAL24PC:
5218 /* It makes no sense to point a local relocation
5219 at a symbol not in this object. */
5220 if (unresolved_reloc)
5221 {
5222 if (! (*info->callbacks->undefined_symbol) (info,
5223 h->root.root.string,
5224 input_bfd,
5225 input_section,
5226 rel->r_offset,
5227 TRUE))
5228 return FALSE;
5229 continue;
5230 }
5231 break;
5232
5233 case R_PPC_DTPREL16:
5234 case R_PPC_DTPREL16_LO:
5235 case R_PPC_DTPREL16_HI:
5236 case R_PPC_DTPREL16_HA:
5237 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5238 break;
5239
5240 /* Relocations that may need to be propagated if this is a shared
5241 object. */
5242 case R_PPC_TPREL16:
5243 case R_PPC_TPREL16_LO:
5244 case R_PPC_TPREL16_HI:
5245 case R_PPC_TPREL16_HA:
5246 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5247 /* The TPREL16 relocs shouldn't really be used in shared
5248 libs as they will result in DT_TEXTREL being set, but
5249 support them anyway. */
5250 goto dodyn;
5251
5252 case R_PPC_TPREL32:
5253 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5254 goto dodyn;
5255
5256 case R_PPC_DTPREL32:
5257 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5258 goto dodyn;
5259
5260 case R_PPC_DTPMOD32:
5261 relocation = 1;
5262 addend = 0;
5263 goto dodyn;
5264
5265 case R_PPC_REL24:
5266 case R_PPC_REL32:
5267 case R_PPC_REL14:
5268 case R_PPC_REL14_BRTAKEN:
5269 case R_PPC_REL14_BRNTAKEN:
5270 /* If these relocations are not to a named symbol, they can be
5271 handled right here, no need to bother the dynamic linker. */
5272 if (SYMBOL_REFERENCES_LOCAL (info, h)
5273 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5274 break;
5275 /* fall through */
5276
5277 /* Relocations that always need to be propagated if this is a shared
5278 object. */
5279 case R_PPC_ADDR32:
5280 case R_PPC_ADDR24:
5281 case R_PPC_ADDR16:
5282 case R_PPC_ADDR16_LO:
5283 case R_PPC_ADDR16_HI:
5284 case R_PPC_ADDR16_HA:
5285 case R_PPC_ADDR14:
5286 case R_PPC_ADDR14_BRTAKEN:
5287 case R_PPC_ADDR14_BRNTAKEN:
5288 case R_PPC_UADDR32:
5289 case R_PPC_UADDR16:
5290 /* r_symndx will be zero only for relocs against symbols
5291 from removed linkonce sections, or sections discarded by
5292 a linker script. */
5293 dodyn:
5294 if (r_symndx == 0)
5295 break;
5296 /* Fall thru. */
5297
5298 if ((info->shared
5299 && (h == NULL
5300 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5301 || h->root.type != bfd_link_hash_undefweak)
5302 && (MUST_BE_DYN_RELOC (r_type)
5303 || !SYMBOL_CALLS_LOCAL (info, h)))
5304 || (ELIMINATE_COPY_RELOCS
5305 && !info->shared
5306 && (input_section->flags & SEC_ALLOC) != 0
5307 && h != NULL
5308 && h->dynindx != -1
5309 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5310 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5311 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
5312 {
5313 int skip;
5314
5315 #ifdef DEBUG
5316 fprintf (stderr, "ppc_elf_relocate_section needs to "
5317 "create relocation for %s\n",
5318 (h && h->root.root.string
5319 ? h->root.root.string : "<unknown>"));
5320 #endif
5321
5322 /* When generating a shared object, these relocations
5323 are copied into the output file to be resolved at run
5324 time. */
5325 if (sreloc == NULL)
5326 {
5327 const char *name;
5328
5329 name = (bfd_elf_string_from_elf_section
5330 (input_bfd,
5331 elf_elfheader (input_bfd)->e_shstrndx,
5332 elf_section_data (input_section)->rel_hdr.sh_name));
5333 if (name == NULL)
5334 return FALSE;
5335
5336 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
5337 && strcmp (bfd_get_section_name (input_bfd,
5338 input_section),
5339 name + 5) == 0);
5340
5341 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
5342 BFD_ASSERT (sreloc != NULL);
5343 }
5344
5345 skip = 0;
5346
5347 outrel.r_offset =
5348 _bfd_elf_section_offset (output_bfd, info, input_section,
5349 rel->r_offset);
5350 if (outrel.r_offset == (bfd_vma) -1
5351 || outrel.r_offset == (bfd_vma) -2)
5352 skip = (int) outrel.r_offset;
5353 outrel.r_offset += (input_section->output_section->vma
5354 + input_section->output_offset);
5355
5356 if (skip)
5357 memset (&outrel, 0, sizeof outrel);
5358 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
5359 {
5360 unresolved_reloc = FALSE;
5361 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5362 outrel.r_addend = rel->r_addend;
5363 }
5364 else
5365 {
5366 outrel.r_addend = relocation + rel->r_addend;
5367
5368 if (r_type == R_PPC_ADDR32)
5369 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
5370 else
5371 {
5372 long indx;
5373
5374 if (bfd_is_abs_section (sec))
5375 indx = 0;
5376 else if (sec == NULL || sec->owner == NULL)
5377 {
5378 bfd_set_error (bfd_error_bad_value);
5379 return FALSE;
5380 }
5381 else
5382 {
5383 asection *osec;
5384
5385 /* We are turning this relocation into one
5386 against a section symbol. It would be
5387 proper to subtract the symbol's value,
5388 osec->vma, from the emitted reloc addend,
5389 but ld.so expects buggy relocs. */
5390 osec = sec->output_section;
5391 indx = elf_section_data (osec)->dynindx;
5392 BFD_ASSERT (indx > 0);
5393 #ifdef DEBUG
5394 if (indx <= 0)
5395 printf ("indx=%d section=%s flags=%08x name=%s\n",
5396 indx, osec->name, osec->flags,
5397 h->root.root.string);
5398 #endif
5399 }
5400
5401 outrel.r_info = ELF32_R_INFO (indx, r_type);
5402 }
5403 }
5404
5405 loc = sreloc->contents;
5406 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5407 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5408
5409 if (skip == -1)
5410 continue;
5411
5412 /* This reloc will be computed at runtime. We clear the memory
5413 so that it contains predictable value. */
5414 if (! skip
5415 && ((input_section->flags & SEC_ALLOC) != 0
5416 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
5417 {
5418 relocation = howto->pc_relative ? outrel.r_offset : 0;
5419 addend = 0;
5420 break;
5421 }
5422 }
5423 break;
5424
5425 case R_PPC_RELAX32PC:
5426 relocation -= (input_section->output_section->vma
5427 + input_section->output_offset
5428 + rel->r_offset - 4);
5429 /* Fall thru */
5430 case R_PPC_RELAX32:
5431 {
5432 unsigned long t0;
5433 unsigned long t1;
5434
5435 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
5436 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
5437
5438 /* We're clearing the bits for R_PPC_ADDR16_HA
5439 and R_PPC_ADDR16_LO here. */
5440 t0 &= ~0xffff;
5441 t1 &= ~0xffff;
5442
5443 /* t0 is HA, t1 is LO */
5444 relocation += addend;
5445 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
5446 t1 |= relocation & 0xffff;
5447
5448 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
5449 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
5450 }
5451 continue;
5452
5453 /* Indirect .sdata relocation. */
5454 case R_PPC_EMB_SDAI16:
5455 BFD_ASSERT (htab->sdata != NULL);
5456 relocation
5457 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5458 htab->sdata, h, relocation,
5459 rel, R_PPC_RELATIVE);
5460 break;
5461
5462 /* Indirect .sdata2 relocation. */
5463 case R_PPC_EMB_SDA2I16:
5464 BFD_ASSERT (htab->sdata2 != NULL);
5465 relocation
5466 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5467 htab->sdata2, h, relocation,
5468 rel, R_PPC_RELATIVE);
5469 break;
5470
5471 /* Handle the TOC16 reloc. We want to use the offset within the .got
5472 section, not the actual VMA. This is appropriate when generating
5473 an embedded ELF object, for which the .got section acts like the
5474 AIX .toc section. */
5475 case R_PPC_TOC16: /* phony GOT16 relocations */
5476 BFD_ASSERT (sec != NULL);
5477 BFD_ASSERT (bfd_is_und_section (sec)
5478 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
5479 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)
5480
5481 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
5482 break;
5483
5484 case R_PPC_PLTREL24:
5485 /* Relocation is to the entry for this symbol in the
5486 procedure linkage table. */
5487 BFD_ASSERT (h != NULL);
5488
5489 if (h->plt.offset == (bfd_vma) -1
5490 || htab->plt == NULL)
5491 {
5492 /* We didn't make a PLT entry for this symbol. This
5493 happens when statically linking PIC code, or when
5494 using -Bsymbolic. */
5495 break;
5496 }
5497
5498 unresolved_reloc = FALSE;
5499 relocation = (htab->plt->output_section->vma
5500 + htab->plt->output_offset
5501 + h->plt.offset);
5502 break;
5503
5504 /* Relocate against _SDA_BASE_. */
5505 case R_PPC_SDAREL16:
5506 {
5507 const char *name;
5508 const struct elf_link_hash_entry *sh;
5509
5510 BFD_ASSERT (sec != NULL);
5511 name = bfd_get_section_name (abfd, sec->output_section);
5512 if (! ((strncmp (name, ".sdata", 6) == 0
5513 && (name[6] == 0 || name[6] == '.'))
5514 || (strncmp (name, ".sbss", 5) == 0
5515 && (name[5] == 0 || name[5] == '.'))))
5516 {
5517 (*_bfd_error_handler)
5518 (_("%s: the target (%s) of a %s relocation is "
5519 "in the wrong output section (%s)"),
5520 bfd_archive_filename (input_bfd),
5521 sym_name,
5522 howto->name,
5523 name);
5524 }
5525 sh = htab->sdata->sym_hash;
5526 addend -= (sh->root.u.def.value
5527 + sh->root.u.def.section->output_section->vma
5528 + sh->root.u.def.section->output_offset);
5529 }
5530 break;
5531
5532 /* Relocate against _SDA2_BASE_. */
5533 case R_PPC_EMB_SDA2REL:
5534 {
5535 const char *name;
5536 const struct elf_link_hash_entry *sh;
5537
5538 BFD_ASSERT (sec != NULL);
5539 name = bfd_get_section_name (abfd, sec->output_section);
5540 if (! (strncmp (name, ".sdata2", 7) == 0
5541 || strncmp (name, ".sbss2", 6) == 0))
5542 {
5543 (*_bfd_error_handler)
5544 (_("%s: the target (%s) of a %s relocation is "
5545 "in the wrong output section (%s)"),
5546 bfd_archive_filename (input_bfd),
5547 sym_name,
5548 howto->name,
5549 name);
5550
5551 bfd_set_error (bfd_error_bad_value);
5552 ret = FALSE;
5553 continue;
5554 }
5555 sh = htab->sdata2->sym_hash;
5556 addend -= (sh->root.u.def.value
5557 + sh->root.u.def.section->output_section->vma
5558 + sh->root.u.def.section->output_offset);
5559 }
5560 break;
5561
5562 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
5563 case R_PPC_EMB_SDA21:
5564 case R_PPC_EMB_RELSDA:
5565 {
5566 const char *name;
5567 const struct elf_link_hash_entry *sh;
5568 int reg;
5569
5570 BFD_ASSERT (sec != NULL);
5571 name = bfd_get_section_name (abfd, sec->output_section);
5572 if (((strncmp (name, ".sdata", 6) == 0
5573 && (name[6] == 0 || name[6] == '.'))
5574 || (strncmp (name, ".sbss", 5) == 0
5575 && (name[5] == 0 || name[5] == '.'))))
5576 {
5577 reg = 13;
5578 sh = htab->sdata->sym_hash;
5579 addend -= (sh->root.u.def.value
5580 + sh->root.u.def.section->output_section->vma
5581 + sh->root.u.def.section->output_offset);
5582 }
5583
5584 else if (strncmp (name, ".sdata2", 7) == 0
5585 || strncmp (name, ".sbss2", 6) == 0)
5586 {
5587 reg = 2;
5588 sh = htab->sdata2->sym_hash;
5589 addend -= (sh->root.u.def.value
5590 + sh->root.u.def.section->output_section->vma
5591 + sh->root.u.def.section->output_offset);
5592 }
5593
5594 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
5595 || strcmp (name, ".PPC.EMB.sbss0") == 0)
5596 {
5597 reg = 0;
5598 }
5599
5600 else
5601 {
5602 (*_bfd_error_handler)
5603 (_("%s: the target (%s) of a %s relocation is "
5604 "in the wrong output section (%s)"),
5605 bfd_archive_filename (input_bfd),
5606 sym_name,
5607 howto->name,
5608 name);
5609
5610 bfd_set_error (bfd_error_bad_value);
5611 ret = FALSE;
5612 continue;
5613 }
5614
5615 if (r_type == R_PPC_EMB_SDA21)
5616 { /* fill in register field */
5617 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5618 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
5619 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5620 }
5621 }
5622 break;
5623
5624 /* Relocate against the beginning of the section. */
5625 case R_PPC_SECTOFF:
5626 case R_PPC_SECTOFF_LO:
5627 case R_PPC_SECTOFF_HI:
5628 case R_PPC_SECTOFF_HA:
5629 BFD_ASSERT (sec != NULL);
5630 addend -= sec->output_section->vma;
5631 break;
5632
5633 /* Negative relocations. */
5634 case R_PPC_EMB_NADDR32:
5635 case R_PPC_EMB_NADDR16:
5636 case R_PPC_EMB_NADDR16_LO:
5637 case R_PPC_EMB_NADDR16_HI:
5638 case R_PPC_EMB_NADDR16_HA:
5639 addend -= 2 * relocation;
5640 break;
5641
5642 case R_PPC_COPY:
5643 case R_PPC_GLOB_DAT:
5644 case R_PPC_JMP_SLOT:
5645 case R_PPC_RELATIVE:
5646 case R_PPC_PLT32:
5647 case R_PPC_PLTREL32:
5648 case R_PPC_PLT16_LO:
5649 case R_PPC_PLT16_HI:
5650 case R_PPC_PLT16_HA:
5651 case R_PPC_ADDR30:
5652 case R_PPC_EMB_RELSEC16:
5653 case R_PPC_EMB_RELST_LO:
5654 case R_PPC_EMB_RELST_HI:
5655 case R_PPC_EMB_RELST_HA:
5656 case R_PPC_EMB_BIT_FLD:
5657 (*_bfd_error_handler)
5658 (_("%s: relocation %s is not yet supported for symbol %s."),
5659 bfd_archive_filename (input_bfd),
5660 howto->name,
5661 sym_name);
5662
5663 bfd_set_error (bfd_error_invalid_operation);
5664 ret = FALSE;
5665 continue;
5666 }
5667
5668 /* Do any further special processing. */
5669 switch (r_type)
5670 {
5671 default:
5672 break;
5673
5674 case R_PPC_ADDR16_HA:
5675 case R_PPC_GOT16_HA:
5676 case R_PPC_PLT16_HA:
5677 case R_PPC_SECTOFF_HA:
5678 case R_PPC_TPREL16_HA:
5679 case R_PPC_DTPREL16_HA:
5680 case R_PPC_GOT_TLSGD16_HA:
5681 case R_PPC_GOT_TLSLD16_HA:
5682 case R_PPC_GOT_TPREL16_HA:
5683 case R_PPC_GOT_DTPREL16_HA:
5684 case R_PPC_EMB_NADDR16_HA:
5685 case R_PPC_EMB_RELST_HA:
5686 /* It's just possible that this symbol is a weak symbol
5687 that's not actually defined anywhere. In that case,
5688 'sec' would be NULL, and we should leave the symbol
5689 alone (it will be set to zero elsewhere in the link). */
5690 if (sec != NULL)
5691 /* Add 0x10000 if sign bit in 0:15 is set.
5692 Bits 0:15 are not used. */
5693 addend += 0x8000;
5694 break;
5695 }
5696
5697 #ifdef DEBUG
5698 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
5699 "offset = %ld, addend = %ld\n",
5700 howto->name,
5701 (int) r_type,
5702 sym_name,
5703 r_symndx,
5704 (long) rel->r_offset,
5705 (long) addend);
5706 #endif
5707
5708 if (unresolved_reloc
5709 && !((input_section->flags & SEC_DEBUGGING) != 0
5710 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
5711 {
5712 (*_bfd_error_handler)
5713 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
5714 bfd_archive_filename (input_bfd),
5715 bfd_get_section_name (input_bfd, input_section),
5716 (long) rel->r_offset,
5717 howto->name,
5718 sym_name);
5719 ret = FALSE;
5720 }
5721
5722 r = _bfd_final_link_relocate (howto,
5723 input_bfd,
5724 input_section,
5725 contents,
5726 rel->r_offset,
5727 relocation,
5728 addend);
5729
5730 if (r != bfd_reloc_ok)
5731 {
5732 if (sym_name == NULL)
5733 sym_name = "(null)";
5734 if (r == bfd_reloc_overflow)
5735 {
5736 if (warned)
5737 continue;
5738 if (h != NULL
5739 && h->root.type == bfd_link_hash_undefweak
5740 && howto->pc_relative)
5741 {
5742 /* Assume this is a call protected by other code that
5743 detect the symbol is undefined. If this is the case,
5744 we can safely ignore the overflow. If not, the
5745 program is hosed anyway, and a little warning isn't
5746 going to help. */
5747
5748 continue;
5749 }
5750
5751 if (! (*info->callbacks->reloc_overflow) (info,
5752 sym_name,
5753 howto->name,
5754 rel->r_addend,
5755 input_bfd,
5756 input_section,
5757 rel->r_offset))
5758 return FALSE;
5759 }
5760 else
5761 {
5762 (*_bfd_error_handler)
5763 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
5764 bfd_archive_filename (input_bfd),
5765 bfd_get_section_name (input_bfd, input_section),
5766 (long) rel->r_offset, howto->name, sym_name, (int) r);
5767 ret = FALSE;
5768 }
5769 }
5770 }
5771
5772 #ifdef DEBUG
5773 fprintf (stderr, "\n");
5774 #endif
5775
5776 return ret;
5777 }
5778
5779 static enum elf_reloc_type_class
5780 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
5781 {
5782 switch (ELF32_R_TYPE (rela->r_info))
5783 {
5784 case R_PPC_RELATIVE:
5785 return reloc_class_relative;
5786 case R_PPC_REL24:
5787 case R_PPC_ADDR24:
5788 case R_PPC_JMP_SLOT:
5789 return reloc_class_plt;
5790 case R_PPC_COPY:
5791 return reloc_class_copy;
5792 default:
5793 return reloc_class_normal;
5794 }
5795 }
5796 \f
5797 /* Support for core dump NOTE sections. */
5798
5799 static bfd_boolean
5800 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
5801 {
5802 int offset;
5803 unsigned int raw_size;
5804
5805 switch (note->descsz)
5806 {
5807 default:
5808 return FALSE;
5809
5810 case 268: /* Linux/PPC. */
5811 /* pr_cursig */
5812 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
5813
5814 /* pr_pid */
5815 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
5816
5817 /* pr_reg */
5818 offset = 72;
5819 raw_size = 192;
5820
5821 break;
5822 }
5823
5824 /* Make a ".reg/999" section. */
5825 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
5826 raw_size, note->descpos + offset);
5827 }
5828
5829 static bfd_boolean
5830 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
5831 {
5832 switch (note->descsz)
5833 {
5834 default:
5835 return FALSE;
5836
5837 case 128: /* Linux/PPC elf_prpsinfo. */
5838 elf_tdata (abfd)->core_program
5839 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
5840 elf_tdata (abfd)->core_command
5841 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
5842 }
5843
5844 /* Note that for some reason, a spurious space is tacked
5845 onto the end of the args in some (at least one anyway)
5846 implementations, so strip it off if it exists. */
5847
5848 {
5849 char *command = elf_tdata (abfd)->core_command;
5850 int n = strlen (command);
5851
5852 if (0 < n && command[n - 1] == ' ')
5853 command[n - 1] = '\0';
5854 }
5855
5856 return TRUE;
5857 }
5858 \f
5859 /* Very simple linked list structure for recording apuinfo values. */
5860 typedef struct apuinfo_list
5861 {
5862 struct apuinfo_list *next;
5863 unsigned long value;
5864 }
5865 apuinfo_list;
5866
5867 static apuinfo_list *head;
5868
5869
5870 static void
5871 apuinfo_list_init (void)
5872 {
5873 head = NULL;
5874 }
5875
5876 static void
5877 apuinfo_list_add (unsigned long value)
5878 {
5879 apuinfo_list *entry = head;
5880
5881 while (entry != NULL)
5882 {
5883 if (entry->value == value)
5884 return;
5885 entry = entry->next;
5886 }
5887
5888 entry = bfd_malloc (sizeof (* entry));
5889 if (entry == NULL)
5890 return;
5891
5892 entry->value = value;
5893 entry->next = head;
5894 head = entry;
5895 }
5896
5897 static unsigned
5898 apuinfo_list_length (void)
5899 {
5900 apuinfo_list *entry;
5901 unsigned long count;
5902
5903 for (entry = head, count = 0;
5904 entry;
5905 entry = entry->next)
5906 ++ count;
5907
5908 return count;
5909 }
5910
5911 static inline unsigned long
5912 apuinfo_list_element (unsigned long number)
5913 {
5914 apuinfo_list * entry;
5915
5916 for (entry = head;
5917 entry && number --;
5918 entry = entry->next)
5919 ;
5920
5921 return entry ? entry->value : 0;
5922 }
5923
5924 static void
5925 apuinfo_list_finish (void)
5926 {
5927 apuinfo_list *entry;
5928
5929 for (entry = head; entry;)
5930 {
5931 apuinfo_list *next = entry->next;
5932 free (entry);
5933 entry = next;
5934 }
5935
5936 head = NULL;
5937 }
5938
5939 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
5940 #define APUINFO_LABEL "APUinfo"
5941
5942 /* Scan the input BFDs and create a linked list of
5943 the APUinfo values that will need to be emitted. */
5944
5945 static void
5946 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
5947 {
5948 bfd *ibfd;
5949 asection *asec;
5950 char *buffer;
5951 unsigned num_input_sections;
5952 bfd_size_type output_section_size;
5953 unsigned i;
5954 unsigned num_entries;
5955 unsigned long offset;
5956 unsigned long length;
5957 const char *error_message = NULL;
5958
5959 if (link_info == NULL)
5960 return;
5961
5962 /* Scan the input bfds, looking for apuinfo sections. */
5963 num_input_sections = 0;
5964 output_section_size = 0;
5965
5966 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5967 {
5968 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
5969 if (asec)
5970 {
5971 ++ num_input_sections;
5972 output_section_size += asec->_raw_size;
5973 }
5974 }
5975
5976 /* We need at least one input sections
5977 in order to make merging worthwhile. */
5978 if (num_input_sections < 1)
5979 return;
5980
5981 /* Just make sure that the output section exists as well. */
5982 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
5983 if (asec == NULL)
5984 return;
5985
5986 /* Allocate a buffer for the contents of the input sections. */
5987 buffer = bfd_malloc (output_section_size);
5988 if (buffer == NULL)
5989 return;
5990
5991 offset = 0;
5992 apuinfo_list_init ();
5993
5994 /* Read in the input sections contents. */
5995 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5996 {
5997 unsigned long datum;
5998 char *ptr;
5999
6000 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
6001 if (asec == NULL)
6002 continue;
6003
6004 length = asec->_raw_size;
6005 if (length < 24)
6006 {
6007 error_message = _("corrupt or empty %s section in %s");
6008 goto fail;
6009 }
6010
6011 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
6012 || (bfd_bread (buffer + offset, length, ibfd) != length))
6013 {
6014 error_message = _("unable to read in %s section from %s");
6015 goto fail;
6016 }
6017
6018 /* Process the contents of the section. */
6019 ptr = buffer + offset;
6020 error_message = _("corrupt %s section in %s");
6021
6022 /* Verify the contents of the header. Note - we have to
6023 extract the values this way in order to allow for a
6024 host whose endian-ness is different from the target. */
6025 datum = bfd_get_32 (ibfd, ptr);
6026 if (datum != sizeof APUINFO_LABEL)
6027 goto fail;
6028
6029 datum = bfd_get_32 (ibfd, ptr + 8);
6030 if (datum != 0x2)
6031 goto fail;
6032
6033 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
6034 goto fail;
6035
6036 /* Get the number of bytes used for apuinfo entries. */
6037 datum = bfd_get_32 (ibfd, ptr + 4);
6038 if (datum + 20 != length)
6039 goto fail;
6040
6041 /* Make sure that we do not run off the end of the section. */
6042 if (offset + length > output_section_size)
6043 goto fail;
6044
6045 /* Scan the apuinfo section, building a list of apuinfo numbers. */
6046 for (i = 0; i < datum; i += 4)
6047 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
6048
6049 /* Update the offset. */
6050 offset += length;
6051 }
6052
6053 error_message = NULL;
6054
6055 /* Compute the size of the output section. */
6056 num_entries = apuinfo_list_length ();
6057 output_section_size = 20 + num_entries * 4;
6058
6059 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6060
6061 if (! bfd_set_section_size (abfd, asec, output_section_size))
6062 ibfd = abfd,
6063 error_message = _("warning: unable to set size of %s section in %s");
6064
6065 fail:
6066 free (buffer);
6067
6068 if (error_message)
6069 (*_bfd_error_handler) (error_message, APUINFO_SECTION_NAME,
6070 bfd_archive_filename (ibfd));
6071 }
6072
6073
6074 /* Prevent the output section from accumulating the input sections'
6075 contents. We have already stored this in our linked list structure. */
6076
6077 static bfd_boolean
6078 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
6079 asection *asec,
6080 bfd_byte *contents ATTRIBUTE_UNUSED)
6081 {
6082 return (apuinfo_list_length ()
6083 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
6084 }
6085
6086
6087 /* Finally we can generate the output section. */
6088
6089 static void
6090 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
6091 {
6092 bfd_byte *buffer;
6093 asection *asec;
6094 unsigned i;
6095 unsigned num_entries;
6096 bfd_size_type length;
6097
6098 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6099 if (asec == NULL)
6100 return;
6101
6102 if (apuinfo_list_length () == 0)
6103 return;
6104
6105 length = asec->_raw_size;
6106 if (length < 20)
6107 return;
6108
6109 buffer = bfd_malloc (length);
6110 if (buffer == NULL)
6111 {
6112 (*_bfd_error_handler)
6113 (_("failed to allocate space for new APUinfo section."));
6114 return;
6115 }
6116
6117 /* Create the apuinfo header. */
6118 num_entries = apuinfo_list_length ();
6119 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
6120 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
6121 bfd_put_32 (abfd, 0x2, buffer + 8);
6122 strcpy (buffer + 12, APUINFO_LABEL);
6123
6124 length = 20;
6125 for (i = 0; i < num_entries; i++)
6126 {
6127 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
6128 length += 4;
6129 }
6130
6131 if (length != asec->_raw_size)
6132 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
6133
6134 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
6135 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
6136
6137 free (buffer);
6138
6139 apuinfo_list_finish ();
6140 }
6141
6142 /* Add extra PPC sections -- Note, for now, make .sbss2 and
6143 .PPC.EMB.sbss0 a normal section, and not a bss section so
6144 that the linker doesn't crater when trying to make more than
6145 2 sections. */
6146
6147 static struct bfd_elf_special_section const ppc_elf_special_sections[]=
6148 {
6149 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
6150 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
6151 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
6152 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
6153 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
6154 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
6155 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
6156 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
6157 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
6158 { NULL, 0, 0, 0, 0 }
6159 };
6160 \f
6161 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
6162 #define TARGET_LITTLE_NAME "elf32-powerpcle"
6163 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
6164 #define TARGET_BIG_NAME "elf32-powerpc"
6165 #define ELF_ARCH bfd_arch_powerpc
6166 #define ELF_MACHINE_CODE EM_PPC
6167 #ifdef __QNXTARGET__
6168 #define ELF_MAXPAGESIZE 0x1000
6169 #else
6170 #define ELF_MAXPAGESIZE 0x10000
6171 #endif
6172 #define elf_info_to_howto ppc_elf_info_to_howto
6173
6174 #ifdef EM_CYGNUS_POWERPC
6175 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6176 #endif
6177
6178 #ifdef EM_PPC_OLD
6179 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6180 #endif
6181
6182 #define elf_backend_plt_not_loaded 1
6183 #define elf_backend_got_symbol_offset 4
6184 #define elf_backend_can_gc_sections 1
6185 #define elf_backend_can_refcount 1
6186 #define elf_backend_got_header_size 12
6187 #define elf_backend_rela_normal 1
6188
6189 #define bfd_elf32_mkobject ppc_elf_mkobject
6190 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
6191 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
6192 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
6193 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
6194 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
6195
6196 #define elf_backend_object_p ppc_elf_object_p
6197 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
6198 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
6199 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
6200 #define elf_backend_relocate_section ppc_elf_relocate_section
6201 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
6202 #define elf_backend_check_relocs ppc_elf_check_relocs
6203 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
6204 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
6205 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
6206 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
6207 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
6208 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
6209 #define elf_backend_fake_sections ppc_elf_fake_sections
6210 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
6211 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
6212 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
6213 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
6214 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
6215 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
6216 #define elf_backend_final_write_processing ppc_elf_final_write_processing
6217 #define elf_backend_write_section ppc_elf_write_section
6218 #define elf_backend_special_sections ppc_elf_special_sections
6219
6220 #include "elf32-target.h"
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