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* ld-cris/expdyn1.d, ld-cris/expdyn5.d, ld-cris/expdyn6.d,
[binutils.git] / bfd / elf32-ppc.c
blob9c22c17244924d72b460c04c071c95aa24b7b54e
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004 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 trampoff = (isec->size + 3) & (bfd_vma) -4;
1683 /* Space for a branch around any trampolines. */
1684 trampoff += 4;
1685
1686 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1687
1688 /* Get a copy of the native relocations. */
1689 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
1690 link_info->keep_memory);
1691 if (internal_relocs == NULL)
1692 goto error_return;
1693
1694 ppc_info = ppc_elf_hash_table (link_info);
1695 irelend = internal_relocs + isec->reloc_count;
1696
1697 for (irel = internal_relocs; irel < irelend; irel++)
1698 {
1699 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
1700 bfd_vma symaddr, reladdr, toff, roff;
1701 asection *tsec;
1702 struct one_fixup *f;
1703 size_t insn_offset = 0;
1704 bfd_vma max_branch_offset, val;
1705 bfd_byte *hit_addr;
1706 unsigned long t0;
1707 unsigned char sym_type;
1708
1709 switch (r_type)
1710 {
1711 case R_PPC_REL24:
1712 case R_PPC_LOCAL24PC:
1713 case R_PPC_PLTREL24:
1714 max_branch_offset = 1 << 25;
1715 break;
1716
1717 case R_PPC_REL14:
1718 case R_PPC_REL14_BRTAKEN:
1719 case R_PPC_REL14_BRNTAKEN:
1720 max_branch_offset = 1 << 15;
1721 break;
1722
1723 default:
1724 continue;
1725 }
1726
1727 /* Get the value of the symbol referred to by the reloc. */
1728 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1729 {
1730 /* A local symbol. */
1731 Elf_Internal_Sym *isym;
1732
1733 /* Read this BFD's local symbols. */
1734 if (isymbuf == NULL)
1735 {
1736 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1737 if (isymbuf == NULL)
1738 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1739 symtab_hdr->sh_info, 0,
1740 NULL, NULL, NULL);
1741 if (isymbuf == 0)
1742 goto error_return;
1743 }
1744 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1745 if (isym->st_shndx == SHN_UNDEF)
1746 continue; /* We can't do anything with undefined symbols. */
1747 else if (isym->st_shndx == SHN_ABS)
1748 tsec = bfd_abs_section_ptr;
1749 else if (isym->st_shndx == SHN_COMMON)
1750 tsec = bfd_com_section_ptr;
1751 else
1752 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1753
1754 toff = isym->st_value;
1755 sym_type = ELF_ST_TYPE (isym->st_info);
1756 }
1757 else
1758 {
1759 /* Global symbol handling. */
1760 unsigned long indx;
1761 struct elf_link_hash_entry *h;
1762
1763 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1764 h = elf_sym_hashes (abfd)[indx];
1765
1766 while (h->root.type == bfd_link_hash_indirect
1767 || h->root.type == bfd_link_hash_warning)
1768 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1769
1770 if (r_type == R_PPC_PLTREL24
1771 && ppc_info->plt != NULL
1772 && h->plt.offset != (bfd_vma) -1)
1773 {
1774 tsec = ppc_info->plt;
1775 toff = h->plt.offset;
1776 }
1777 else if (h->root.type == bfd_link_hash_defined
1778 || h->root.type == bfd_link_hash_defweak)
1779 {
1780 tsec = h->root.u.def.section;
1781 toff = h->root.u.def.value;
1782 }
1783 else
1784 continue;
1785
1786 sym_type = h->type;
1787 }
1788
1789 /* If the branch and target are in the same section, you have
1790 no hope of adding stubs. We'll error out later should the
1791 branch overflow. */
1792 if (tsec == isec)
1793 continue;
1794
1795 /* There probably isn't any reason to handle symbols in
1796 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
1797 attribute for a code section, and we are only looking at
1798 branches. However, implement it correctly here as a
1799 reference for other target relax_section functions. */
1800 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
1801 {
1802 /* At this stage in linking, no SEC_MERGE symbol has been
1803 adjusted, so all references to such symbols need to be
1804 passed through _bfd_merged_section_offset. (Later, in
1805 relocate_section, all SEC_MERGE symbols *except* for
1806 section symbols have been adjusted.)
1807
1808 gas may reduce relocations against symbols in SEC_MERGE
1809 sections to a relocation against the section symbol when
1810 the original addend was zero. When the reloc is against
1811 a section symbol we should include the addend in the
1812 offset passed to _bfd_merged_section_offset, since the
1813 location of interest is the original symbol. On the
1814 other hand, an access to "sym+addend" where "sym" is not
1815 a section symbol should not include the addend; Such an
1816 access is presumed to be an offset from "sym"; The
1817 location of interest is just "sym". */
1818 if (sym_type == STT_SECTION)
1819 toff += irel->r_addend;
1820
1821 toff = _bfd_merged_section_offset (abfd, &tsec,
1822 elf_section_data (tsec)->sec_info,
1823 toff);
1824
1825 if (sym_type != STT_SECTION)
1826 toff += irel->r_addend;
1827 }
1828 else
1829 toff += irel->r_addend;
1830
1831 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
1832
1833 roff = irel->r_offset;
1834 reladdr = isec->output_section->vma + isec->output_offset + roff;
1835
1836 /* If the branch is in range, no need to do anything. */
1837 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
1838 continue;
1839
1840 /* Look for an existing fixup to this address. */
1841 for (f = fixups; f ; f = f->next)
1842 if (f->tsec == tsec && f->toff == toff)
1843 break;
1844
1845 if (f == NULL)
1846 {
1847 size_t size;
1848 unsigned long stub_rtype;
1849
1850 val = trampoff - roff;
1851 if (val >= max_branch_offset)
1852 /* Oh dear, we can't reach a trampoline. Don't try to add
1853 one. We'll report an error later. */
1854 continue;
1855
1856 if (link_info->shared)
1857 {
1858 size = 4 * ARRAY_SIZE (shared_stub_entry);
1859 insn_offset = 12;
1860 stub_rtype = R_PPC_RELAX32PC;
1861 }
1862 else
1863 {
1864 size = 4 * ARRAY_SIZE (stub_entry);
1865 insn_offset = 0;
1866 stub_rtype = R_PPC_RELAX32;
1867 }
1868
1869 /* Hijack the old relocation. Since we need two
1870 relocations for this use a "composite" reloc. */
1871 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1872 stub_rtype);
1873 irel->r_offset = trampoff + insn_offset;
1874
1875 /* Record the fixup so we don't do it again this section. */
1876 f = bfd_malloc (sizeof (*f));
1877 f->next = fixups;
1878 f->tsec = tsec;
1879 f->toff = toff;
1880 f->trampoff = trampoff;
1881 fixups = f;
1882
1883 trampoff += size;
1884 }
1885 else
1886 {
1887 val = f->trampoff - roff;
1888 if (val >= max_branch_offset)
1889 continue;
1890
1891 /* Nop out the reloc, since we're finalizing things here. */
1892 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
1893 }
1894
1895 /* Get the section contents. */
1896 if (contents == NULL)
1897 {
1898 /* Get cached copy if it exists. */
1899 if (elf_section_data (isec)->this_hdr.contents != NULL)
1900 contents = elf_section_data (isec)->this_hdr.contents;
1901 else
1902 {
1903 /* Go get them off disk. */
1904 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
1905 goto error_return;
1906 }
1907 }
1908
1909 /* Fix up the existing branch to hit the trampoline. */
1910 hit_addr = contents + roff;
1911 switch (r_type)
1912 {
1913 case R_PPC_REL24:
1914 case R_PPC_LOCAL24PC:
1915 case R_PPC_PLTREL24:
1916 t0 = bfd_get_32 (abfd, hit_addr);
1917 t0 &= ~0x3fffffc;
1918 t0 |= val & 0x3fffffc;
1919 bfd_put_32 (abfd, t0, hit_addr);
1920 break;
1921
1922 case R_PPC_REL14:
1923 case R_PPC_REL14_BRTAKEN:
1924 case R_PPC_REL14_BRNTAKEN:
1925 t0 = bfd_get_32 (abfd, hit_addr);
1926 t0 &= ~0xfffc;
1927 t0 |= val & 0xfffc;
1928 bfd_put_32 (abfd, t0, hit_addr);
1929 break;
1930 }
1931 }
1932
1933 /* Write out the trampolines. */
1934 changed = fixups != NULL;
1935 if (fixups != NULL)
1936 {
1937 const int *stub;
1938 bfd_byte *dest;
1939 bfd_vma val;
1940 int i, size;
1941
1942 do
1943 {
1944 struct one_fixup *f = fixups;
1945 fixups = fixups->next;
1946 free (f);
1947 }
1948 while (fixups);
1949
1950 contents = bfd_realloc (contents, trampoff);
1951 if (contents == NULL)
1952 goto error_return;
1953
1954 isec->size = (isec->size + 3) & (bfd_vma) -4;
1955 /* Branch around the trampolines. */
1956 val = trampoff - isec->size + 0x48000000;
1957 dest = contents + isec->size;
1958 isec->size = trampoff;
1959 bfd_put_32 (abfd, val, dest);
1960 dest += 4;
1961
1962 if (link_info->shared)
1963 {
1964 stub = shared_stub_entry;
1965 size = ARRAY_SIZE (shared_stub_entry);
1966 }
1967 else
1968 {
1969 stub = stub_entry;
1970 size = ARRAY_SIZE (stub_entry);
1971 }
1972
1973 i = 0;
1974 while (dest < contents + trampoff)
1975 {
1976 bfd_put_32 (abfd, stub[i], dest);
1977 i++;
1978 if (i == size)
1979 i = 0;
1980 dest += 4;
1981 }
1982 BFD_ASSERT (i == 0);
1983 }
1984
1985 if (isymbuf != NULL
1986 && symtab_hdr->contents != (unsigned char *) isymbuf)
1987 {
1988 if (! link_info->keep_memory)
1989 free (isymbuf);
1990 else
1991 {
1992 /* Cache the symbols for elf_link_input_bfd. */
1993 symtab_hdr->contents = (unsigned char *) isymbuf;
1994 }
1995 }
1996
1997 if (contents != NULL
1998 && elf_section_data (isec)->this_hdr.contents != contents)
1999 {
2000 if (!changed && !link_info->keep_memory)
2001 free (contents);
2002 else
2003 {
2004 /* Cache the section contents for elf_link_input_bfd. */
2005 elf_section_data (isec)->this_hdr.contents = contents;
2006 }
2007 }
2008
2009 if (elf_section_data (isec)->relocs != internal_relocs)
2010 {
2011 if (!changed)
2012 free (internal_relocs);
2013 else
2014 elf_section_data (isec)->relocs = internal_relocs;
2015 }
2016
2017 *again = changed;
2018 return TRUE;
2019
2020 error_return:
2021 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
2022 free (isymbuf);
2023 if (contents != NULL
2024 && elf_section_data (isec)->this_hdr.contents != contents)
2025 free (contents);
2026 if (internal_relocs != NULL
2027 && elf_section_data (isec)->relocs != internal_relocs)
2028 free (internal_relocs);
2029 return FALSE;
2030 }
2031 \f
2032 static reloc_howto_type *
2033 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2034 bfd_reloc_code_real_type code)
2035 {
2036 enum elf_ppc_reloc_type r;
2037
2038 /* Initialize howto table if not already done. */
2039 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2040 ppc_elf_howto_init ();
2041
2042 switch (code)
2043 {
2044 default:
2045 return NULL;
2046
2047 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
2048 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
2049 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
2050 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
2051 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
2052 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
2053 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
2054 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
2055 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
2056 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
2057 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
2058 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
2059 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
2060 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
2061 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
2062 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
2063 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
2064 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
2065 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
2066 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
2067 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
2068 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
2069 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
2070 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
2071 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
2072 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
2073 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
2074 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
2075 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
2076 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
2077 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
2078 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
2079 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
2080 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
2081 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
2082 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
2083 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
2084 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
2085 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
2086 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
2087 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
2088 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
2089 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
2090 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
2091 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
2092 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
2093 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
2094 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
2095 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
2096 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
2097 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
2098 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
2099 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
2100 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
2101 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
2102 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
2103 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
2104 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
2105 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
2106 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
2107 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
2108 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
2109 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
2110 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
2111 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
2112 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
2113 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
2114 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
2115 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
2116 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
2117 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
2118 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
2119 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
2120 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
2121 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
2122 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
2123 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
2124 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
2125 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
2126 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2127 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2128 }
2129
2130 return ppc_elf_howto_table[r];
2131 };
2132
2133 /* Set the howto pointer for a PowerPC ELF reloc. */
2134
2135 static void
2136 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2137 arelent *cache_ptr,
2138 Elf_Internal_Rela *dst)
2139 {
2140 /* Initialize howto table if not already done. */
2141 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2142 ppc_elf_howto_init ();
2143
2144 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2145 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2146 }
2147
2148 /* Handle the R_PPC_ADDR16_HA reloc. */
2149
2150 static bfd_reloc_status_type
2151 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2152 arelent *reloc_entry,
2153 asymbol *symbol,
2154 void *data ATTRIBUTE_UNUSED,
2155 asection *input_section,
2156 bfd *output_bfd,
2157 char **error_message ATTRIBUTE_UNUSED)
2158 {
2159 bfd_vma relocation;
2160
2161 if (output_bfd != NULL)
2162 {
2163 reloc_entry->address += input_section->output_offset;
2164 return bfd_reloc_ok;
2165 }
2166
2167 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2168 return bfd_reloc_outofrange;
2169
2170 if (bfd_is_com_section (symbol->section))
2171 relocation = 0;
2172 else
2173 relocation = symbol->value;
2174
2175 relocation += symbol->section->output_section->vma;
2176 relocation += symbol->section->output_offset;
2177 relocation += reloc_entry->addend;
2178
2179 reloc_entry->addend += (relocation & 0x8000) << 1;
2180
2181 return bfd_reloc_continue;
2182 }
2183
2184 static bfd_reloc_status_type
2185 ppc_elf_unhandled_reloc (bfd *abfd,
2186 arelent *reloc_entry,
2187 asymbol *symbol,
2188 void *data,
2189 asection *input_section,
2190 bfd *output_bfd,
2191 char **error_message)
2192 {
2193 /* If this is a relocatable link (output_bfd test tells us), just
2194 call the generic function. Any adjustment will be done at final
2195 link time. */
2196 if (output_bfd != NULL)
2197 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2198 input_section, output_bfd, error_message);
2199
2200 if (error_message != NULL)
2201 {
2202 static char buf[60];
2203 sprintf (buf, _("generic linker can't handle %s"),
2204 reloc_entry->howto->name);
2205 *error_message = buf;
2206 }
2207 return bfd_reloc_dangerous;
2208 }
2209
2210 /* Fix bad default arch selected for a 32 bit input bfd when the
2211 default is 64 bit. */
2212
2213 static bfd_boolean
2214 ppc_elf_object_p (bfd *abfd)
2215 {
2216 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2217 {
2218 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2219
2220 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2221 {
2222 /* Relies on arch after 64 bit default being 32 bit default. */
2223 abfd->arch_info = abfd->arch_info->next;
2224 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2225 }
2226 }
2227 return TRUE;
2228 }
2229
2230 /* Function to set whether a module needs the -mrelocatable bit set. */
2231
2232 static bfd_boolean
2233 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2234 {
2235 BFD_ASSERT (!elf_flags_init (abfd)
2236 || elf_elfheader (abfd)->e_flags == flags);
2237
2238 elf_elfheader (abfd)->e_flags = flags;
2239 elf_flags_init (abfd) = TRUE;
2240 return TRUE;
2241 }
2242
2243 /* Merge backend specific data from an object file to the output
2244 object file when linking. */
2245
2246 static bfd_boolean
2247 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2248 {
2249 flagword old_flags;
2250 flagword new_flags;
2251 bfd_boolean error;
2252
2253 /* Check if we have the same endianess. */
2254 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
2255 return FALSE;
2256
2257 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2258 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2259 return TRUE;
2260
2261 new_flags = elf_elfheader (ibfd)->e_flags;
2262 old_flags = elf_elfheader (obfd)->e_flags;
2263 if (!elf_flags_init (obfd))
2264 {
2265 /* First call, no flags set. */
2266 elf_flags_init (obfd) = TRUE;
2267 elf_elfheader (obfd)->e_flags = new_flags;
2268 }
2269
2270 /* Compatible flags are ok. */
2271 else if (new_flags == old_flags)
2272 ;
2273
2274 /* Incompatible flags. */
2275 else
2276 {
2277 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
2278 to be linked with either. */
2279 error = FALSE;
2280 if ((new_flags & EF_PPC_RELOCATABLE) != 0
2281 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
2282 {
2283 error = TRUE;
2284 (*_bfd_error_handler)
2285 (_("%B: compiled with -mrelocatable and linked with "
2286 "modules compiled normally"), ibfd);
2287 }
2288 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
2289 && (old_flags & EF_PPC_RELOCATABLE) != 0)
2290 {
2291 error = TRUE;
2292 (*_bfd_error_handler)
2293 (_("%B: compiled normally and linked with "
2294 "modules compiled with -mrelocatable"), ibfd);
2295 }
2296
2297 /* The output is -mrelocatable-lib iff both the input files are. */
2298 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
2299 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
2300
2301 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
2302 but each input file is either -mrelocatable or -mrelocatable-lib. */
2303 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
2304 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
2305 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
2306 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
2307
2308 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
2309 any module uses it. */
2310 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
2311
2312 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2313 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2314
2315 /* Warn about any other mismatches. */
2316 if (new_flags != old_flags)
2317 {
2318 error = TRUE;
2319 (*_bfd_error_handler)
2320 (_("%B: uses different e_flags (0x%lx) fields "
2321 "than previous modules (0x%lx)"),
2322 ibfd, (long) new_flags, (long) old_flags);
2323 }
2324
2325 if (error)
2326 {
2327 bfd_set_error (bfd_error_bad_value);
2328 return FALSE;
2329 }
2330 }
2331
2332 return TRUE;
2333 }
2334 \f
2335 /* Handle a PowerPC specific section when reading an object file. This
2336 is called when elfcode.h finds a section with an unknown type. */
2337
2338 static bfd_boolean
2339 ppc_elf_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, const char *name)
2340 {
2341 asection *newsect;
2342 flagword flags;
2343
2344 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2345 return FALSE;
2346
2347 newsect = hdr->bfd_section;
2348 flags = bfd_get_section_flags (abfd, newsect);
2349 if (hdr->sh_flags & SHF_EXCLUDE)
2350 flags |= SEC_EXCLUDE;
2351
2352 if (hdr->sh_type == SHT_ORDERED)
2353 flags |= SEC_SORT_ENTRIES;
2354
2355 bfd_set_section_flags (abfd, newsect, flags);
2356 return TRUE;
2357 }
2358 \f
2359 /* Set up any other section flags and such that may be necessary. */
2360
2361 static bfd_boolean
2362 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2363 Elf_Internal_Shdr *shdr,
2364 asection *asect)
2365 {
2366 if ((asect->flags & SEC_EXCLUDE) != 0)
2367 shdr->sh_flags |= SHF_EXCLUDE;
2368
2369 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2370 shdr->sh_type = SHT_ORDERED;
2371
2372 return TRUE;
2373 }
2374 \f
2375 /* Find a linker generated pointer with a given addend and type. */
2376
2377 static elf_linker_section_pointers_t *
2378 elf_find_pointer_linker_section
2379 (elf_linker_section_pointers_t *linker_pointers,
2380 bfd_vma addend,
2381 elf_linker_section_t *lsect)
2382 {
2383 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2384 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2385 return linker_pointers;
2386
2387 return NULL;
2388 }
2389 \f
2390 /* Allocate a pointer to live in a linker created section. */
2391
2392 static bfd_boolean
2393 elf_create_pointer_linker_section (bfd *abfd,
2394 struct bfd_link_info *info,
2395 elf_linker_section_t *lsect,
2396 struct elf_link_hash_entry *h,
2397 const Elf_Internal_Rela *rel)
2398 {
2399 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2400 elf_linker_section_pointers_t *linker_section_ptr;
2401 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2402 bfd_size_type amt;
2403
2404 BFD_ASSERT (lsect != NULL);
2405
2406 /* Is this a global symbol? */
2407 if (h != NULL)
2408 {
2409 struct ppc_elf_link_hash_entry *eh;
2410
2411 /* Has this symbol already been allocated? If so, our work is done. */
2412 eh = (struct ppc_elf_link_hash_entry *) h;
2413 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2414 rel->r_addend,
2415 lsect))
2416 return TRUE;
2417
2418 ptr_linker_section_ptr = &eh->linker_section_pointer;
2419 /* Make sure this symbol is output as a dynamic symbol. */
2420 if (h->dynindx == -1)
2421 {
2422 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2423 return FALSE;
2424 }
2425
2426 if (lsect->rel_section)
2427 lsect->rel_section->size += sizeof (Elf32_External_Rela);
2428 }
2429 else
2430 {
2431 /* Allocation of a pointer to a local symbol. */
2432 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2433
2434 /* Allocate a table to hold the local symbols if first time. */
2435 if (!ptr)
2436 {
2437 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2438
2439 amt = num_symbols;
2440 amt *= sizeof (elf_linker_section_pointers_t *);
2441 ptr = bfd_zalloc (abfd, amt);
2442
2443 if (!ptr)
2444 return FALSE;
2445
2446 elf_local_ptr_offsets (abfd) = ptr;
2447 }
2448
2449 /* Has this symbol already been allocated? If so, our work is done. */
2450 if (elf_find_pointer_linker_section (ptr[r_symndx],
2451 rel->r_addend,
2452 lsect))
2453 return TRUE;
2454
2455 ptr_linker_section_ptr = &ptr[r_symndx];
2456
2457 if (info->shared)
2458 {
2459 /* If we are generating a shared object, we need to
2460 output a R_<xxx>_RELATIVE reloc so that the
2461 dynamic linker can adjust this GOT entry. */
2462 BFD_ASSERT (lsect->rel_section != NULL);
2463 lsect->rel_section->size += sizeof (Elf32_External_Rela);
2464 }
2465 }
2466
2467 /* Allocate space for a pointer in the linker section, and allocate
2468 a new pointer record from internal memory. */
2469 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2470 amt = sizeof (elf_linker_section_pointers_t);
2471 linker_section_ptr = bfd_alloc (abfd, amt);
2472
2473 if (!linker_section_ptr)
2474 return FALSE;
2475
2476 linker_section_ptr->next = *ptr_linker_section_ptr;
2477 linker_section_ptr->addend = rel->r_addend;
2478 linker_section_ptr->lsect = lsect;
2479 linker_section_ptr->written_address_p = FALSE;
2480 *ptr_linker_section_ptr = linker_section_ptr;
2481
2482 linker_section_ptr->offset = lsect->section->size;
2483 lsect->section->size += 4;
2484
2485 #ifdef DEBUG
2486 fprintf (stderr,
2487 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2488 lsect->name, (long) linker_section_ptr->offset,
2489 (long) lsect->section->size);
2490 #endif
2491
2492 return TRUE;
2493 }
2494 \f
2495 #define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR)
2496
2497 /* Fill in the address for a pointer generated in a linker section. */
2498
2499 static bfd_vma
2500 elf_finish_pointer_linker_section (bfd *output_bfd,
2501 bfd *input_bfd,
2502 struct bfd_link_info *info,
2503 elf_linker_section_t *lsect,
2504 struct elf_link_hash_entry *h,
2505 bfd_vma relocation,
2506 const Elf_Internal_Rela *rel,
2507 int relative_reloc)
2508 {
2509 elf_linker_section_pointers_t *linker_section_ptr;
2510
2511 BFD_ASSERT (lsect != NULL);
2512
2513 if (h != NULL)
2514 {
2515 /* Handle global symbol. */
2516 struct ppc_elf_link_hash_entry *eh;
2517
2518 eh = (struct ppc_elf_link_hash_entry *) h;
2519 linker_section_ptr
2520 = elf_find_pointer_linker_section (eh->linker_section_pointer,
2521 rel->r_addend,
2522 lsect);
2523
2524 BFD_ASSERT (linker_section_ptr != NULL);
2525
2526 if (! elf_hash_table (info)->dynamic_sections_created
2527 || (info->shared
2528 && info->symbolic
2529 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
2530 {
2531 /* This is actually a static link, or it is a
2532 -Bsymbolic link and the symbol is defined
2533 locally. We must initialize this entry in the
2534 global section.
2535
2536 When doing a dynamic link, we create a .rela.<xxx>
2537 relocation entry to initialize the value. This
2538 is done in the finish_dynamic_symbol routine. */
2539 if (!linker_section_ptr->written_address_p)
2540 {
2541 linker_section_ptr->written_address_p = TRUE;
2542 bfd_put_ptr (output_bfd,
2543 relocation + linker_section_ptr->addend,
2544 (lsect->section->contents
2545 + linker_section_ptr->offset));
2546 }
2547 }
2548 }
2549 else
2550 {
2551 /* Handle local symbol. */
2552 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2553 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
2554 BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
2555 linker_section_ptr = (elf_find_pointer_linker_section
2556 (elf_local_ptr_offsets (input_bfd)[r_symndx],
2557 rel->r_addend,
2558 lsect));
2559
2560 BFD_ASSERT (linker_section_ptr != NULL);
2561
2562 /* Write out pointer if it hasn't been rewritten out before. */
2563 if (!linker_section_ptr->written_address_p)
2564 {
2565 linker_section_ptr->written_address_p = TRUE;
2566 bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
2567 lsect->section->contents + linker_section_ptr->offset);
2568
2569 if (info->shared)
2570 {
2571 /* We need to generate a relative reloc for the dynamic
2572 linker. */
2573
2574 asection *srel = lsect->rel_section;
2575 Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL];
2576 bfd_byte *erel;
2577 const struct elf_backend_data *bed;
2578 unsigned int i;
2579
2580 BFD_ASSERT (srel != NULL);
2581
2582 bed = get_elf_backend_data (output_bfd);
2583 for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
2584 {
2585 outrel[i].r_offset = (lsect->section->output_section->vma
2586 + lsect->section->output_offset
2587 + linker_section_ptr->offset);
2588 outrel[i].r_info = 0;
2589 outrel[i].r_addend = 0;
2590 }
2591 outrel[0].r_info = ELF32_R_INFO (0, relative_reloc);
2592 erel = lsect->section->contents;
2593 erel += (elf_section_data (lsect->section)->rel_count++
2594 * sizeof (Elf32_External_Rela));
2595 bfd_elf32_swap_reloca_out (output_bfd, outrel, erel);
2596 }
2597 }
2598 }
2599
2600 relocation = (lsect->section->output_offset
2601 + linker_section_ptr->offset
2602 - lsect->sym_offset);
2603
2604 #ifdef DEBUG
2605 fprintf (stderr,
2606 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
2607 lsect->name, (long) relocation, (long) relocation);
2608 #endif
2609
2610 /* Subtract out the addend, because it will get added back in by the normal
2611 processing. */
2612 return relocation - linker_section_ptr->addend;
2613 }
2614 \f
2615 /* Create a special linker section */
2616 static elf_linker_section_t *
2617 ppc_elf_create_linker_section (bfd *abfd,
2618 struct bfd_link_info *info,
2619 enum elf_linker_section_enum which)
2620 {
2621 elf_linker_section_t *lsect;
2622 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2623 asection *s, *sym_sec;
2624 bfd_size_type amt;
2625 flagword flags;
2626 const char *name;
2627 const char *rel_name;
2628 const char *sym_name;
2629 bfd_vma sym_offset;
2630
2631 /* Both of these sections are (technically) created by the user
2632 putting data in them, so they shouldn't be marked
2633 SEC_LINKER_CREATED.
2634
2635 The linker creates them so it has somewhere to attach their
2636 respective symbols. In fact, if they were empty it would
2637 be OK to leave the symbol set to 0 (or any random number), because
2638 the appropriate register should never be used. */
2639 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
2640 sym_offset = 32768;
2641
2642 switch (which)
2643 {
2644 default:
2645 abort ();
2646 return NULL;
2647
2648 case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
2649 name = ".sdata";
2650 rel_name = ".rela.sdata";
2651 sym_name = "_SDA_BASE_";
2652 break;
2653
2654 case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
2655 name = ".sdata2";
2656 rel_name = ".rela.sdata2";
2657 sym_name = "_SDA2_BASE_";
2658 flags |= SEC_READONLY;
2659 break;
2660 }
2661
2662 /* Record the first bfd that needs the special sections. */
2663 if (!htab->elf.dynobj)
2664 htab->elf.dynobj = abfd;
2665
2666 amt = sizeof (elf_linker_section_t);
2667 lsect = bfd_zalloc (htab->elf.dynobj, amt);
2668
2669 lsect->sym_offset = sym_offset;
2670
2671 /* See if the sections already exist. */
2672 sym_sec = s = bfd_get_section_by_name (htab->elf.dynobj, name);
2673 if (s == NULL || (s->flags & flags) != flags)
2674 {
2675 s = bfd_make_section_anyway (htab->elf.dynobj, name);
2676 if (s == NULL
2677 || !bfd_set_section_flags (htab->elf.dynobj, s, flags))
2678 return NULL;
2679 if (sym_sec == NULL)
2680 sym_sec = s;
2681 }
2682 lsect->section = s;
2683
2684 if (bfd_get_section_alignment (htab->elf.dynobj, s) < 2
2685 && !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2686 return NULL;
2687
2688 s->size = align_power (s->size, 2);
2689
2690 #ifdef DEBUG
2691 fprintf (stderr, "Creating section %s, current size = %ld\n",
2692 name, (long) s->size);
2693 #endif
2694
2695 if (sym_name)
2696 {
2697 struct elf_link_hash_entry *h;
2698 struct bfd_link_hash_entry *bh;
2699
2700 #ifdef DEBUG
2701 fprintf (stderr, "Adding %s to section %s\n", sym_name, name);
2702 #endif
2703 bh = bfd_link_hash_lookup (info->hash, sym_name,
2704 FALSE, FALSE, FALSE);
2705
2706 if ((bh == NULL || bh->type == bfd_link_hash_undefined)
2707 && !(_bfd_generic_link_add_one_symbol
2708 (info, abfd, sym_name, BSF_GLOBAL, sym_sec, sym_offset, NULL,
2709 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
2710 return NULL;
2711 h = (struct elf_link_hash_entry *) bh;
2712
2713 h->type = STT_OBJECT;
2714 lsect->sym_hash = h;
2715
2716 if (info->shared
2717 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2718 return NULL;
2719 }
2720
2721 if (info->shared)
2722 {
2723 s = bfd_make_section_anyway (htab->elf.dynobj, rel_name);
2724 lsect->rel_section = s;
2725 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2726 | SEC_LINKER_CREATED | SEC_READONLY);
2727 if (s == NULL
2728 || ! bfd_set_section_flags (htab->elf.dynobj, s, flags)
2729 || ! bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2730 return NULL;
2731 }
2732
2733 return lsect;
2734 }
2735 \f
2736 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
2737 need to bump up the number of section headers. */
2738
2739 static int
2740 ppc_elf_additional_program_headers (bfd *abfd)
2741 {
2742 asection *s;
2743 int ret;
2744
2745 ret = 0;
2746
2747 s = bfd_get_section_by_name (abfd, ".interp");
2748 if (s != NULL)
2749 ++ret;
2750
2751 s = bfd_get_section_by_name (abfd, ".sbss2");
2752 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->size > 0)
2753 ++ret;
2754
2755 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2756 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->size > 0)
2757 ++ret;
2758
2759 return ret;
2760 }
2761
2762 /* Modify the segment map if needed. */
2763
2764 static bfd_boolean
2765 ppc_elf_modify_segment_map (bfd *abfd ATTRIBUTE_UNUSED,
2766 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2767 {
2768 return TRUE;
2769 }
2770 \f
2771 /* The powerpc .got has a blrl instruction in it. Mark it executable. */
2772
2773 static bfd_boolean
2774 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2775 {
2776 struct ppc_elf_link_hash_table *htab;
2777 asection *s;
2778 flagword flags;
2779
2780 if (!_bfd_elf_create_got_section (abfd, info))
2781 return FALSE;
2782
2783 htab = ppc_elf_hash_table (info);
2784 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2785 if (s == NULL)
2786 abort ();
2787
2788 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2789 | SEC_LINKER_CREATED);
2790 if (!bfd_set_section_flags (abfd, s, flags))
2791 return FALSE;
2792
2793 htab->relgot = bfd_make_section (abfd, ".rela.got");
2794 if (!htab->relgot
2795 || ! bfd_set_section_flags (abfd, htab->relgot,
2796 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2797 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2798 | SEC_READONLY))
2799 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2800 return FALSE;
2801
2802 return TRUE;
2803 }
2804
2805 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2806 to output sections (just like _bfd_elf_create_dynamic_sections has
2807 to create .dynbss and .rela.bss). */
2808
2809 static bfd_boolean
2810 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2811 {
2812 struct ppc_elf_link_hash_table *htab;
2813 asection *s;
2814 flagword flags;
2815
2816 htab = ppc_elf_hash_table (info);
2817
2818 if (htab->got == NULL
2819 && !ppc_elf_create_got (abfd, info))
2820 return FALSE;
2821
2822 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2823 return FALSE;
2824
2825 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2826 | SEC_LINKER_CREATED);
2827
2828 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2829 htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
2830 if (s == NULL
2831 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
2832 return FALSE;
2833
2834 if (! info->shared)
2835 {
2836 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2837 htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss");
2838 if (s == NULL
2839 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
2840 || ! bfd_set_section_alignment (abfd, s, 2))
2841 return FALSE;
2842 }
2843
2844 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2845 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2846 if (s == NULL)
2847 abort ();
2848
2849 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
2850 return bfd_set_section_flags (abfd, s, flags);
2851 }
2852
2853 /* Adjust a symbol defined by a dynamic object and referenced by a
2854 regular object. The current definition is in some section of the
2855 dynamic object, but we're not including those sections. We have to
2856 change the definition to something the rest of the link can
2857 understand. */
2858
2859 static bfd_boolean
2860 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2861 struct elf_link_hash_entry *h)
2862 {
2863 struct ppc_elf_link_hash_table *htab;
2864 asection *s;
2865 unsigned int power_of_two;
2866
2867 #ifdef DEBUG
2868 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
2869 h->root.root.string);
2870 #endif
2871
2872 /* Make sure we know what is going on here. */
2873 htab = ppc_elf_hash_table (info);
2874 BFD_ASSERT (htab->elf.dynobj != NULL
2875 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2876 || h->weakdef != NULL
2877 || ((h->elf_link_hash_flags
2878 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2879 && (h->elf_link_hash_flags
2880 & ELF_LINK_HASH_REF_REGULAR) != 0
2881 && (h->elf_link_hash_flags
2882 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2883
2884 /* Deal with function syms. */
2885 if (h->type == STT_FUNC
2886 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2887 {
2888 /* Clear procedure linkage table information for any symbol that
2889 won't need a .plt entry. */
2890 if (h->plt.refcount <= 0
2891 || SYMBOL_CALLS_LOCAL (info, h)
2892 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2893 && h->root.type == bfd_link_hash_undefweak))
2894 {
2895 /* A PLT entry is not required/allowed when:
2896
2897 1. We are not using ld.so; because then the PLT entry
2898 can't be set up, so we can't use one. In this case,
2899 ppc_elf_adjust_dynamic_symbol won't even be called.
2900
2901 2. GC has rendered the entry unused.
2902
2903 3. We know for certain that a call to this symbol
2904 will go to this object, or will remain undefined. */
2905 h->plt.offset = (bfd_vma) -1;
2906 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2907 }
2908 return TRUE;
2909 }
2910 else
2911 h->plt.offset = (bfd_vma) -1;
2912
2913 /* If this is a weak symbol, and there is a real definition, the
2914 processor independent code will have arranged for us to see the
2915 real definition first, and we can just use the same value. */
2916 if (h->weakdef != NULL)
2917 {
2918 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2919 || h->weakdef->root.type == bfd_link_hash_defweak);
2920 h->root.u.def.section = h->weakdef->root.u.def.section;
2921 h->root.u.def.value = h->weakdef->root.u.def.value;
2922 if (ELIMINATE_COPY_RELOCS)
2923 h->elf_link_hash_flags
2924 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
2925 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
2926 return TRUE;
2927 }
2928
2929 /* This is a reference to a symbol defined by a dynamic object which
2930 is not a function. */
2931
2932 /* If we are creating a shared library, we must presume that the
2933 only references to the symbol are via the global offset table.
2934 For such cases we need not do anything here; the relocations will
2935 be handled correctly by relocate_section. */
2936 if (info->shared)
2937 return TRUE;
2938
2939 /* If there are no references to this symbol that do not use the
2940 GOT, we don't need to generate a copy reloc. */
2941 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
2942 return TRUE;
2943
2944 if (ELIMINATE_COPY_RELOCS)
2945 {
2946 struct ppc_elf_dyn_relocs *p;
2947 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
2948 {
2949 s = p->sec->output_section;
2950 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2951 break;
2952 }
2953
2954 /* If we didn't find any dynamic relocs in read-only sections, then
2955 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2956 if (p == NULL)
2957 {
2958 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
2959 return TRUE;
2960 }
2961 }
2962
2963 /* We must allocate the symbol in our .dynbss section, which will
2964 become part of the .bss section of the executable. There will be
2965 an entry for this symbol in the .dynsym section. The dynamic
2966 object will contain position independent code, so all references
2967 from the dynamic object to this symbol will go through the global
2968 offset table. The dynamic linker will use the .dynsym entry to
2969 determine the address it must put in the global offset table, so
2970 both the dynamic object and the regular object will refer to the
2971 same memory location for the variable.
2972
2973 Of course, if the symbol is sufficiently small, we must instead
2974 allocate it in .sbss. FIXME: It would be better to do this if and
2975 only if there were actually SDAREL relocs for that symbol. */
2976
2977 if (h->size <= elf_gp_size (htab->elf.dynobj))
2978 s = htab->dynsbss;
2979 else
2980 s = htab->dynbss;
2981 BFD_ASSERT (s != NULL);
2982
2983 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
2984 copy the initial value out of the dynamic object and into the
2985 runtime process image. We need to remember the offset into the
2986 .rela.bss section we are going to use. */
2987 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2988 {
2989 asection *srel;
2990
2991 if (h->size <= elf_gp_size (htab->elf.dynobj))
2992 srel = htab->relsbss;
2993 else
2994 srel = htab->relbss;
2995 BFD_ASSERT (srel != NULL);
2996 srel->size += sizeof (Elf32_External_Rela);
2997 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2998 }
2999
3000 /* We need to figure out the alignment required for this symbol. I
3001 have no idea how ELF linkers handle this. */
3002 power_of_two = bfd_log2 (h->size);
3003 if (power_of_two > 4)
3004 power_of_two = 4;
3005
3006 /* Apply the required alignment. */
3007 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
3008 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
3009 {
3010 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
3011 return FALSE;
3012 }
3013
3014 /* Define the symbol as being at this point in the section. */
3015 h->root.u.def.section = s;
3016 h->root.u.def.value = s->size;
3017
3018 /* Increment the section size to make room for the symbol. */
3019 s->size += h->size;
3020
3021 return TRUE;
3022 }
3023 \f
3024 /* Of those relocs that might be copied as dynamic relocs, this macro
3025 selects those that must be copied when linking a shared library,
3026 even when the symbol is local. */
3027
3028 #define MUST_BE_DYN_RELOC(RTYPE) \
3029 ((RTYPE) != R_PPC_REL24 \
3030 && (RTYPE) != R_PPC_REL14 \
3031 && (RTYPE) != R_PPC_REL14_BRTAKEN \
3032 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
3033 && (RTYPE) != R_PPC_REL32)
3034
3035 /* Allocate space in associated reloc sections for dynamic relocs. */
3036
3037 static bfd_boolean
3038 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3039 {
3040 struct bfd_link_info *info = inf;
3041 struct ppc_elf_link_hash_entry *eh;
3042 struct ppc_elf_link_hash_table *htab;
3043 struct ppc_elf_dyn_relocs *p;
3044
3045 if (h->root.type == bfd_link_hash_indirect)
3046 return TRUE;
3047
3048 if (h->root.type == bfd_link_hash_warning)
3049 /* When warning symbols are created, they **replace** the "real"
3050 entry in the hash table, thus we never get to see the real
3051 symbol in a hash traversal. So look at it now. */
3052 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3053
3054 htab = ppc_elf_hash_table (info);
3055 if (htab->elf.dynamic_sections_created
3056 && h->plt.refcount > 0)
3057 {
3058 /* Make sure this symbol is output as a dynamic symbol. */
3059 if (h->dynindx == -1
3060 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3061 {
3062 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3063 return FALSE;
3064 }
3065
3066 if (info->shared
3067 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3068 {
3069 asection *s = htab->plt;
3070
3071 /* If this is the first .plt entry, make room for the special
3072 first entry. */
3073 if (s->size == 0)
3074 s->size += PLT_INITIAL_ENTRY_SIZE;
3075
3076 /* The PowerPC PLT is actually composed of two parts, the
3077 first part is 2 words (for a load and a jump), and then
3078 there is a remaining word available at the end. */
3079 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
3080 + (PLT_SLOT_SIZE
3081 * ((s->size - PLT_INITIAL_ENTRY_SIZE)
3082 / PLT_ENTRY_SIZE)));
3083
3084 /* If this symbol is not defined in a regular file, and we
3085 are not generating a shared library, then set the symbol
3086 to this location in the .plt. This is required to make
3087 function pointers compare as equal between the normal
3088 executable and the shared library. */
3089 if (! info->shared
3090 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3091 {
3092 h->root.u.def.section = s;
3093 h->root.u.def.value = h->plt.offset;
3094 }
3095
3096 /* Make room for this entry. After the 8192nd entry, room
3097 for two entries is allocated. */
3098 s->size += PLT_ENTRY_SIZE;
3099 if ((s->size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
3100 > PLT_NUM_SINGLE_ENTRIES)
3101 s->size += PLT_ENTRY_SIZE;
3102
3103 /* We also need to make an entry in the .rela.plt section. */
3104 htab->relplt->size += sizeof (Elf32_External_Rela);
3105 }
3106 else
3107 {
3108 h->plt.offset = (bfd_vma) -1;
3109 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3110 }
3111 }
3112 else
3113 {
3114 h->plt.offset = (bfd_vma) -1;
3115 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3116 }
3117
3118 eh = (struct ppc_elf_link_hash_entry *) h;
3119 if (eh->elf.got.refcount > 0)
3120 {
3121 /* Make sure this symbol is output as a dynamic symbol. */
3122 if (eh->elf.dynindx == -1
3123 && (eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3124 {
3125 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
3126 return FALSE;
3127 }
3128
3129 if (eh->tls_mask == (TLS_TLS | TLS_LD)
3130 && !(eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
3131 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
3132 eh->elf.got.offset = (bfd_vma) -1;
3133 else
3134 {
3135 bfd_boolean dyn;
3136 eh->elf.got.offset = htab->got->size;
3137 if ((eh->tls_mask & TLS_TLS) != 0)
3138 {
3139 if ((eh->tls_mask & TLS_LD) != 0)
3140 htab->got->size += 8;
3141 if ((eh->tls_mask & TLS_GD) != 0)
3142 htab->got->size += 8;
3143 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
3144 htab->got->size += 4;
3145 if ((eh->tls_mask & TLS_DTPREL) != 0)
3146 htab->got->size += 4;
3147 }
3148 else
3149 htab->got->size += 4;
3150 dyn = htab->elf.dynamic_sections_created;
3151 if ((info->shared
3152 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
3153 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
3154 || eh->elf.root.type != bfd_link_hash_undefweak))
3155 {
3156 /* All the entries we allocated need relocs. */
3157 htab->relgot->size
3158 += ((htab->got->size - eh->elf.got.offset) / 4
3159 * sizeof (Elf32_External_Rela));
3160 /* Except LD only needs one. */
3161 if ((eh->tls_mask & TLS_LD) != 0)
3162 htab->relgot->size -= sizeof (Elf32_External_Rela);
3163 }
3164 }
3165 }
3166 else
3167 eh->elf.got.offset = (bfd_vma) -1;
3168
3169 if (eh->dyn_relocs == NULL)
3170 return TRUE;
3171
3172 /* In the shared -Bsymbolic case, discard space allocated for
3173 dynamic pc-relative relocs against symbols which turn out to be
3174 defined in regular objects. For the normal shared case, discard
3175 space for relocs that have become local due to symbol visibility
3176 changes. */
3177
3178 if (info->shared)
3179 {
3180 /* Relocs that use pc_count are those that appear on a call insn,
3181 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
3182 generated via assembly. We want calls to protected symbols to
3183 resolve directly to the function rather than going via the plt.
3184 If people want function pointer comparisons to work as expected
3185 then they should avoid writing weird assembly. */
3186 if (SYMBOL_CALLS_LOCAL (info, h))
3187 {
3188 struct ppc_elf_dyn_relocs **pp;
3189
3190 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3191 {
3192 p->count -= p->pc_count;
3193 p->pc_count = 0;
3194 if (p->count == 0)
3195 *pp = p->next;
3196 else
3197 pp = &p->next;
3198 }
3199 }
3200
3201 /* Also discard relocs on undefined weak syms with non-default
3202 visibility. */
3203 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3204 && h->root.type == bfd_link_hash_undefweak)
3205 eh->dyn_relocs = NULL;
3206
3207 /* Make sure undefined weak symbols are output as a dynamic symbol
3208 in PIEs. */
3209 if (info->pie
3210 && eh->dyn_relocs != NULL
3211 && h->dynindx == -1
3212 && h->root.type == bfd_link_hash_undefweak
3213 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3214 {
3215 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3216 return FALSE;
3217 }
3218 }
3219 else if (ELIMINATE_COPY_RELOCS)
3220 {
3221 /* For the non-shared case, discard space for relocs against
3222 symbols which turn out to need copy relocs or are not
3223 dynamic. */
3224
3225 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3226 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3227 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3228 {
3229 /* Make sure this symbol is output as a dynamic symbol.
3230 Undefined weak syms won't yet be marked as dynamic. */
3231 if (h->dynindx == -1
3232 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3233 {
3234 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3235 return FALSE;
3236 }
3237
3238 /* If that succeeded, we know we'll be keeping all the
3239 relocs. */
3240 if (h->dynindx != -1)
3241 goto keep;
3242 }
3243
3244 eh->dyn_relocs = NULL;
3245
3246 keep: ;
3247 }
3248
3249 /* Finally, allocate space. */
3250 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3251 {
3252 asection *sreloc = elf_section_data (p->sec)->sreloc;
3253 sreloc->size += p->count * sizeof (Elf32_External_Rela);
3254 }
3255
3256 return TRUE;
3257 }
3258
3259 /* Find any dynamic relocs that apply to read-only sections. */
3260
3261 static bfd_boolean
3262 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
3263 {
3264 struct ppc_elf_dyn_relocs *p;
3265
3266 if (h->root.type == bfd_link_hash_indirect)
3267 return TRUE;
3268
3269 if (h->root.type == bfd_link_hash_warning)
3270 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3271
3272 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3273 {
3274 asection *s = p->sec->output_section;
3275
3276 if (s != NULL
3277 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
3278 == (SEC_READONLY | SEC_ALLOC)))
3279 {
3280 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
3281
3282 /* Not an error, just cut short the traversal. */
3283 return FALSE;
3284 }
3285 }
3286 return TRUE;
3287 }
3288
3289 /* Set the sizes of the dynamic sections. */
3290
3291 static bfd_boolean
3292 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3293 struct bfd_link_info *info)
3294 {
3295 struct ppc_elf_link_hash_table *htab;
3296 asection *s;
3297 bfd_boolean relocs;
3298 bfd *ibfd;
3299
3300 #ifdef DEBUG
3301 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
3302 #endif
3303
3304 htab = ppc_elf_hash_table (info);
3305 BFD_ASSERT (htab->elf.dynobj != NULL);
3306
3307 if (elf_hash_table (info)->dynamic_sections_created)
3308 {
3309 /* Set the contents of the .interp section to the interpreter. */
3310 if (info->executable)
3311 {
3312 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
3313 BFD_ASSERT (s != NULL);
3314 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3315 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3316 }
3317 }
3318
3319 if (htab->tlsld_got.refcount > 0)
3320 {
3321 htab->tlsld_got.offset = htab->got->size;
3322 htab->got->size += 8;
3323 if (info->shared)
3324 htab->relgot->size += sizeof (Elf32_External_Rela);
3325 }
3326 else
3327 htab->tlsld_got.offset = (bfd_vma) -1;
3328
3329 /* Set up .got offsets for local syms, and space for local dynamic
3330 relocs. */
3331 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3332 {
3333 bfd_signed_vma *local_got;
3334 bfd_signed_vma *end_local_got;
3335 char *lgot_masks;
3336 bfd_size_type locsymcount;
3337 Elf_Internal_Shdr *symtab_hdr;
3338 asection *srel;
3339
3340 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
3341 continue;
3342
3343 for (s = ibfd->sections; s != NULL; s = s->next)
3344 {
3345 struct ppc_elf_dyn_relocs *p;
3346
3347 for (p = ((struct ppc_elf_dyn_relocs *)
3348 elf_section_data (s)->local_dynrel);
3349 p != NULL;
3350 p = p->next)
3351 {
3352 if (!bfd_is_abs_section (p->sec)
3353 && bfd_is_abs_section (p->sec->output_section))
3354 {
3355 /* Input section has been discarded, either because
3356 it is a copy of a linkonce section or due to
3357 linker script /DISCARD/, so we'll be discarding
3358 the relocs too. */
3359 }
3360 else if (p->count != 0)
3361 {
3362 elf_section_data (p->sec)->sreloc->size
3363 += p->count * sizeof (Elf32_External_Rela);
3364 if ((p->sec->output_section->flags
3365 & (SEC_READONLY | SEC_ALLOC))
3366 == (SEC_READONLY | SEC_ALLOC))
3367 info->flags |= DF_TEXTREL;
3368 }
3369 }
3370 }
3371
3372 local_got = elf_local_got_refcounts (ibfd);
3373 if (!local_got)
3374 continue;
3375
3376 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3377 locsymcount = symtab_hdr->sh_info;
3378 end_local_got = local_got + locsymcount;
3379 lgot_masks = (char *) end_local_got;
3380 s = htab->got;
3381 srel = htab->relgot;
3382 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3383 if (*local_got > 0)
3384 {
3385 if (*lgot_masks == (TLS_TLS | TLS_LD))
3386 {
3387 /* If just an LD reloc, we'll just use
3388 htab->tlsld_got.offset. */
3389 if (htab->tlsld_got.offset == (bfd_vma) -1)
3390 {
3391 htab->tlsld_got.offset = s->size;
3392 s->size += 8;
3393 if (info->shared)
3394 srel->size += sizeof (Elf32_External_Rela);
3395 }
3396 *local_got = (bfd_vma) -1;
3397 }
3398 else
3399 {
3400 *local_got = s->size;
3401 if ((*lgot_masks & TLS_TLS) != 0)
3402 {
3403 if ((*lgot_masks & TLS_GD) != 0)
3404 s->size += 8;
3405 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
3406 s->size += 4;
3407 if ((*lgot_masks & TLS_DTPREL) != 0)
3408 s->size += 4;
3409 }
3410 else
3411 s->size += 4;
3412 if (info->shared)
3413 srel->size += ((s->size - *local_got) / 4
3414 * sizeof (Elf32_External_Rela));
3415 }
3416 }
3417 else
3418 *local_got = (bfd_vma) -1;
3419 }
3420
3421 /* Allocate space for global sym dynamic relocs. */
3422 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3423
3424 /* We've now determined the sizes of the various dynamic sections.
3425 Allocate memory for them. */
3426 relocs = FALSE;
3427 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
3428 {
3429 if ((s->flags & SEC_LINKER_CREATED) == 0)
3430 continue;
3431
3432 if (s == htab->plt
3433 || s == htab->got
3434 || (htab->sdata != NULL && s == htab->sdata->section)
3435 || (htab->sdata2 != NULL && s == htab->sdata2->section))
3436 {
3437 /* Strip this section if we don't need it; see the
3438 comment below. */
3439 }
3440 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
3441 {
3442 if (s->size == 0)
3443 {
3444 /* If we don't need this section, strip it from the
3445 output file. This is mostly to handle .rela.bss and
3446 .rela.plt. We must create both sections in
3447 create_dynamic_sections, because they must be created
3448 before the linker maps input sections to output
3449 sections. The linker does that before
3450 adjust_dynamic_symbol is called, and it is that
3451 function which decides whether anything needs to go
3452 into these sections. */
3453 }
3454 else
3455 {
3456 /* Remember whether there are any relocation sections. */
3457 relocs = TRUE;
3458
3459 /* We use the reloc_count field as a counter if we need
3460 to copy relocs into the output file. */
3461 s->reloc_count = 0;
3462 }
3463 }
3464 else
3465 {
3466 /* It's not one of our sections, so don't allocate space. */
3467 continue;
3468 }
3469
3470 if (s->size == 0)
3471 {
3472 _bfd_strip_section_from_output (info, s);
3473 continue;
3474 }
3475
3476 /* Allocate memory for the section contents. */
3477 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
3478 if (s->contents == NULL)
3479 return FALSE;
3480 }
3481
3482 if (htab->elf.dynamic_sections_created)
3483 {
3484 /* Add some entries to the .dynamic section. We fill in the
3485 values later, in ppc_elf_finish_dynamic_sections, but we
3486 must add the entries now so that we get the correct size for
3487 the .dynamic section. The DT_DEBUG entry is filled in by the
3488 dynamic linker and used by the debugger. */
3489 #define add_dynamic_entry(TAG, VAL) \
3490 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3491
3492 if (info->executable)
3493 {
3494 if (!add_dynamic_entry (DT_DEBUG, 0))
3495 return FALSE;
3496 }
3497
3498 if (htab->plt != NULL && htab->plt->size != 0)
3499 {
3500 if (!add_dynamic_entry (DT_PLTGOT, 0)
3501 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3502 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3503 || !add_dynamic_entry (DT_JMPREL, 0))
3504 return FALSE;
3505 }
3506
3507 if (relocs)
3508 {
3509 if (!add_dynamic_entry (DT_RELA, 0)
3510 || !add_dynamic_entry (DT_RELASZ, 0)
3511 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3512 return FALSE;
3513 }
3514
3515 /* If any dynamic relocs apply to a read-only section, then we
3516 need a DT_TEXTREL entry. */
3517 if ((info->flags & DF_TEXTREL) == 0)
3518 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
3519 info);
3520
3521 if ((info->flags & DF_TEXTREL) != 0)
3522 {
3523 if (!add_dynamic_entry (DT_TEXTREL, 0))
3524 return FALSE;
3525 }
3526 }
3527 #undef add_dynamic_entry
3528
3529 return TRUE;
3530 }
3531 \f
3532 static bfd_boolean
3533 update_local_sym_info (bfd *abfd,
3534 Elf_Internal_Shdr *symtab_hdr,
3535 unsigned long r_symndx,
3536 int tls_type)
3537 {
3538 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3539 char *local_got_tls_masks;
3540
3541 if (local_got_refcounts == NULL)
3542 {
3543 bfd_size_type size = symtab_hdr->sh_info;
3544
3545 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3546 local_got_refcounts = bfd_zalloc (abfd, size);
3547 if (local_got_refcounts == NULL)
3548 return FALSE;
3549 elf_local_got_refcounts (abfd) = local_got_refcounts;
3550 }
3551
3552 local_got_refcounts[r_symndx] += 1;
3553 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3554 local_got_tls_masks[r_symndx] |= tls_type;
3555 return TRUE;
3556 }
3557
3558 static void
3559 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3560 {
3561 (*_bfd_error_handler)
3562 (_("%B: relocation %s cannot be used when making a shared object"),
3563 abfd,
3564 ppc_elf_howto_table[r_type]->name);
3565 bfd_set_error (bfd_error_bad_value);
3566 }
3567
3568 /* Look through the relocs for a section during the first phase, and
3569 allocate space in the global offset table or procedure linkage
3570 table. */
3571
3572 static bfd_boolean
3573 ppc_elf_check_relocs (bfd *abfd,
3574 struct bfd_link_info *info,
3575 asection *sec,
3576 const Elf_Internal_Rela *relocs)
3577 {
3578 struct ppc_elf_link_hash_table *htab;
3579 Elf_Internal_Shdr *symtab_hdr;
3580 struct elf_link_hash_entry **sym_hashes;
3581 const Elf_Internal_Rela *rel;
3582 const Elf_Internal_Rela *rel_end;
3583 asection *sreloc;
3584
3585 if (info->relocatable)
3586 return TRUE;
3587
3588 #ifdef DEBUG
3589 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3590 sec, abfd);
3591 #endif
3592
3593 /* Initialize howto table if not already done. */
3594 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3595 ppc_elf_howto_init ();
3596
3597 /* Create the linker generated sections all the time so that the
3598 special symbols are created. */
3599 htab = ppc_elf_hash_table (info);
3600 if (htab->sdata == NULL)
3601 {
3602 htab->sdata = ppc_elf_create_linker_section (abfd, info,
3603 LINKER_SECTION_SDATA);
3604 if (htab->sdata == NULL)
3605 return FALSE;
3606 }
3607
3608 if (htab->sdata2 == NULL)
3609 {
3610 htab->sdata2 = ppc_elf_create_linker_section (abfd, info,
3611 LINKER_SECTION_SDATA2);
3612 if (htab->sdata2 == NULL)
3613 return FALSE;
3614 }
3615
3616 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3617 sym_hashes = elf_sym_hashes (abfd);
3618 sreloc = NULL;
3619
3620 rel_end = relocs + sec->reloc_count;
3621 for (rel = relocs; rel < rel_end; rel++)
3622 {
3623 unsigned long r_symndx;
3624 enum elf_ppc_reloc_type r_type;
3625 struct elf_link_hash_entry *h;
3626 int tls_type = 0;
3627
3628 r_symndx = ELF32_R_SYM (rel->r_info);
3629 if (r_symndx < symtab_hdr->sh_info)
3630 h = NULL;
3631 else
3632 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3633
3634 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3635 This shows up in particular in an R_PPC_ADDR32 in the eabi
3636 startup code. */
3637 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3638 {
3639 if (htab->got == NULL)
3640 {
3641 if (htab->elf.dynobj == NULL)
3642 htab->elf.dynobj = abfd;
3643 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3644 return FALSE;
3645 }
3646 }
3647
3648 r_type = ELF32_R_TYPE (rel->r_info);
3649 switch (r_type)
3650 {
3651 case R_PPC_GOT_TLSLD16:
3652 case R_PPC_GOT_TLSLD16_LO:
3653 case R_PPC_GOT_TLSLD16_HI:
3654 case R_PPC_GOT_TLSLD16_HA:
3655 htab->tlsld_got.refcount += 1;
3656 tls_type = TLS_TLS | TLS_LD;
3657 goto dogottls;
3658
3659 case R_PPC_GOT_TLSGD16:
3660 case R_PPC_GOT_TLSGD16_LO:
3661 case R_PPC_GOT_TLSGD16_HI:
3662 case R_PPC_GOT_TLSGD16_HA:
3663 tls_type = TLS_TLS | TLS_GD;
3664 goto dogottls;
3665
3666 case R_PPC_GOT_TPREL16:
3667 case R_PPC_GOT_TPREL16_LO:
3668 case R_PPC_GOT_TPREL16_HI:
3669 case R_PPC_GOT_TPREL16_HA:
3670 if (info->shared)
3671 info->flags |= DF_STATIC_TLS;
3672 tls_type = TLS_TLS | TLS_TPREL;
3673 goto dogottls;
3674
3675 case R_PPC_GOT_DTPREL16:
3676 case R_PPC_GOT_DTPREL16_LO:
3677 case R_PPC_GOT_DTPREL16_HI:
3678 case R_PPC_GOT_DTPREL16_HA:
3679 tls_type = TLS_TLS | TLS_DTPREL;
3680 dogottls:
3681 sec->has_tls_reloc = 1;
3682 /* Fall thru */
3683
3684 /* GOT16 relocations */
3685 case R_PPC_GOT16:
3686 case R_PPC_GOT16_LO:
3687 case R_PPC_GOT16_HI:
3688 case R_PPC_GOT16_HA:
3689 /* This symbol requires a global offset table entry. */
3690 if (htab->got == NULL)
3691 {
3692 if (htab->elf.dynobj == NULL)
3693 htab->elf.dynobj = abfd;
3694 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3695 return FALSE;
3696 }
3697 if (h != NULL)
3698 {
3699 h->got.refcount += 1;
3700 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3701 }
3702 else
3703 /* This is a global offset table entry for a local symbol. */
3704 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3705 return FALSE;
3706 break;
3707
3708 /* Indirect .sdata relocation. */
3709 case R_PPC_EMB_SDAI16:
3710 if (info->shared)
3711 {
3712 bad_shared_reloc (abfd, r_type);
3713 return FALSE;
3714 }
3715 if (!elf_create_pointer_linker_section (abfd, info,
3716 htab->sdata, h, rel))
3717 return FALSE;
3718 break;
3719
3720 /* Indirect .sdata2 relocation. */
3721 case R_PPC_EMB_SDA2I16:
3722 if (info->shared)
3723 {
3724 bad_shared_reloc (abfd, r_type);
3725 return FALSE;
3726 }
3727 if (!elf_create_pointer_linker_section (abfd, info,
3728 htab->sdata2, h, rel))
3729 return FALSE;
3730 break;
3731
3732 case R_PPC_SDAREL16:
3733 case R_PPC_EMB_SDA2REL:
3734 case R_PPC_EMB_SDA21:
3735 case R_PPC_EMB_RELSDA:
3736 case R_PPC_EMB_NADDR32:
3737 case R_PPC_EMB_NADDR16:
3738 case R_PPC_EMB_NADDR16_LO:
3739 case R_PPC_EMB_NADDR16_HI:
3740 case R_PPC_EMB_NADDR16_HA:
3741 if (info->shared)
3742 {
3743 bad_shared_reloc (abfd, r_type);
3744 return FALSE;
3745 }
3746 break;
3747
3748 case R_PPC_PLT32:
3749 case R_PPC_PLTREL24:
3750 case R_PPC_PLTREL32:
3751 case R_PPC_PLT16_LO:
3752 case R_PPC_PLT16_HI:
3753 case R_PPC_PLT16_HA:
3754 #ifdef DEBUG
3755 fprintf (stderr, "Reloc requires a PLT entry\n");
3756 #endif
3757 /* This symbol requires a procedure linkage table entry. We
3758 actually build the entry in finish_dynamic_symbol,
3759 because this might be a case of linking PIC code without
3760 linking in any dynamic objects, in which case we don't
3761 need to generate a procedure linkage table after all. */
3762
3763 if (h == NULL)
3764 {
3765 /* It does not make sense to have a procedure linkage
3766 table entry for a local symbol. */
3767 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3768 "local symbol"),
3769 abfd,
3770 sec,
3771 (long) rel->r_offset,
3772 ppc_elf_howto_table[r_type]->name);
3773 bfd_set_error (bfd_error_bad_value);
3774 return FALSE;
3775 }
3776
3777 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3778 h->plt.refcount++;
3779 break;
3780
3781 /* The following relocations don't need to propagate the
3782 relocation if linking a shared object since they are
3783 section relative. */
3784 case R_PPC_SECTOFF:
3785 case R_PPC_SECTOFF_LO:
3786 case R_PPC_SECTOFF_HI:
3787 case R_PPC_SECTOFF_HA:
3788 case R_PPC_DTPREL16:
3789 case R_PPC_DTPREL16_LO:
3790 case R_PPC_DTPREL16_HI:
3791 case R_PPC_DTPREL16_HA:
3792 case R_PPC_TOC16:
3793 break;
3794
3795 /* This are just markers. */
3796 case R_PPC_TLS:
3797 case R_PPC_EMB_MRKREF:
3798 case R_PPC_NONE:
3799 case R_PPC_max:
3800 break;
3801
3802 /* These should only appear in dynamic objects. */
3803 case R_PPC_COPY:
3804 case R_PPC_GLOB_DAT:
3805 case R_PPC_JMP_SLOT:
3806 case R_PPC_RELATIVE:
3807 break;
3808
3809 /* These aren't handled yet. We'll report an error later. */
3810 case R_PPC_ADDR30:
3811 case R_PPC_EMB_RELSEC16:
3812 case R_PPC_EMB_RELST_LO:
3813 case R_PPC_EMB_RELST_HI:
3814 case R_PPC_EMB_RELST_HA:
3815 case R_PPC_EMB_BIT_FLD:
3816 break;
3817
3818 /* This refers only to functions defined in the shared library. */
3819 case R_PPC_LOCAL24PC:
3820 break;
3821
3822 /* This relocation describes the C++ object vtable hierarchy.
3823 Reconstruct it for later use during GC. */
3824 case R_PPC_GNU_VTINHERIT:
3825 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3826 return FALSE;
3827 break;
3828
3829 /* This relocation describes which C++ vtable entries are actually
3830 used. Record for later use during GC. */
3831 case R_PPC_GNU_VTENTRY:
3832 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3833 return FALSE;
3834 break;
3835
3836 /* We shouldn't really be seeing these. */
3837 case R_PPC_TPREL32:
3838 if (info->shared)
3839 info->flags |= DF_STATIC_TLS;
3840 goto dodyn;
3841
3842 /* Nor these. */
3843 case R_PPC_DTPMOD32:
3844 case R_PPC_DTPREL32:
3845 goto dodyn;
3846
3847 case R_PPC_TPREL16:
3848 case R_PPC_TPREL16_LO:
3849 case R_PPC_TPREL16_HI:
3850 case R_PPC_TPREL16_HA:
3851 if (info->shared)
3852 info->flags |= DF_STATIC_TLS;
3853 goto dodyn;
3854
3855 /* When creating a shared object, we must copy these
3856 relocs into the output file. We create a reloc
3857 section in dynobj and make room for the reloc. */
3858 case R_PPC_REL24:
3859 case R_PPC_REL14:
3860 case R_PPC_REL14_BRTAKEN:
3861 case R_PPC_REL14_BRNTAKEN:
3862 case R_PPC_REL32:
3863 if (h == NULL
3864 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3865 break;
3866 /* fall through */
3867
3868 case R_PPC_ADDR32:
3869 case R_PPC_ADDR24:
3870 case R_PPC_ADDR16:
3871 case R_PPC_ADDR16_LO:
3872 case R_PPC_ADDR16_HI:
3873 case R_PPC_ADDR16_HA:
3874 case R_PPC_ADDR14:
3875 case R_PPC_ADDR14_BRTAKEN:
3876 case R_PPC_ADDR14_BRNTAKEN:
3877 case R_PPC_UADDR32:
3878 case R_PPC_UADDR16:
3879 if (h != NULL && !info->shared)
3880 {
3881 /* We may need a plt entry if the symbol turns out to be
3882 a function defined in a dynamic object. */
3883 h->plt.refcount++;
3884
3885 /* We may need a copy reloc too. */
3886 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3887 }
3888
3889 dodyn:
3890 /* If we are creating a shared library, and this is a reloc
3891 against a global symbol, or a non PC relative reloc
3892 against a local symbol, then we need to copy the reloc
3893 into the shared library. However, if we are linking with
3894 -Bsymbolic, we do not need to copy a reloc against a
3895 global symbol which is defined in an object we are
3896 including in the link (i.e., DEF_REGULAR is set). At
3897 this point we have not seen all the input files, so it is
3898 possible that DEF_REGULAR is not set now but will be set
3899 later (it is never cleared). In case of a weak definition,
3900 DEF_REGULAR may be cleared later by a strong definition in
3901 a shared library. We account for that possibility below by
3902 storing information in the dyn_relocs field of the hash
3903 table entry. A similar situation occurs when creating
3904 shared libraries and symbol visibility changes render the
3905 symbol local.
3906
3907 If on the other hand, we are creating an executable, we
3908 may need to keep relocations for symbols satisfied by a
3909 dynamic library if we manage to avoid copy relocs for the
3910 symbol. */
3911 if ((info->shared
3912 && (MUST_BE_DYN_RELOC (r_type)
3913 || (h != NULL
3914 && (! info->symbolic
3915 || h->root.type == bfd_link_hash_defweak
3916 || (h->elf_link_hash_flags
3917 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3918 || (ELIMINATE_COPY_RELOCS
3919 && !info->shared
3920 && (sec->flags & SEC_ALLOC) != 0
3921 && h != NULL
3922 && (h->root.type == bfd_link_hash_defweak
3923 || (h->elf_link_hash_flags
3924 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3925 {
3926 struct ppc_elf_dyn_relocs *p;
3927 struct ppc_elf_dyn_relocs **head;
3928
3929 #ifdef DEBUG
3930 fprintf (stderr,
3931 "ppc_elf_check_relocs needs to "
3932 "create relocation for %s\n",
3933 (h && h->root.root.string
3934 ? h->root.root.string : "<unknown>"));
3935 #endif
3936 if (sreloc == NULL)
3937 {
3938 const char *name;
3939
3940 name = (bfd_elf_string_from_elf_section
3941 (abfd,
3942 elf_elfheader (abfd)->e_shstrndx,
3943 elf_section_data (sec)->rel_hdr.sh_name));
3944 if (name == NULL)
3945 return FALSE;
3946
3947 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3948 && strcmp (bfd_get_section_name (abfd, sec),
3949 name + 5) == 0);
3950
3951 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3952 if (sreloc == NULL)
3953 {
3954 flagword flags;
3955
3956 sreloc = bfd_make_section (htab->elf.dynobj, name);
3957 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3958 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3959 if ((sec->flags & SEC_ALLOC) != 0)
3960 flags |= SEC_ALLOC | SEC_LOAD;
3961 if (sreloc == NULL
3962 || ! bfd_set_section_flags (htab->elf.dynobj,
3963 sreloc, flags)
3964 || ! bfd_set_section_alignment (htab->elf.dynobj,
3965 sreloc, 2))
3966 return FALSE;
3967 }
3968 elf_section_data (sec)->sreloc = sreloc;
3969 }
3970
3971 /* If this is a global symbol, we count the number of
3972 relocations we need for this symbol. */
3973 if (h != NULL)
3974 {
3975 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3976 }
3977 else
3978 {
3979 /* Track dynamic relocs needed for local syms too.
3980 We really need local syms available to do this
3981 easily. Oh well. */
3982
3983 asection *s;
3984 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3985 sec, r_symndx);
3986 if (s == NULL)
3987 return FALSE;
3988
3989 head = ((struct ppc_elf_dyn_relocs **)
3990 &elf_section_data (s)->local_dynrel);
3991 }
3992
3993 p = *head;
3994 if (p == NULL || p->sec != sec)
3995 {
3996 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3997 if (p == NULL)
3998 return FALSE;
3999 p->next = *head;
4000 *head = p;
4001 p->sec = sec;
4002 p->count = 0;
4003 p->pc_count = 0;
4004 }
4005
4006 p->count += 1;
4007 if (!MUST_BE_DYN_RELOC (r_type))
4008 p->pc_count += 1;
4009 }
4010
4011 break;
4012 }
4013 }
4014
4015 return TRUE;
4016 }
4017
4018 /* Return the section that should be marked against GC for a given
4019 relocation. */
4020
4021 static asection *
4022 ppc_elf_gc_mark_hook (asection *sec,
4023 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4024 Elf_Internal_Rela *rel,
4025 struct elf_link_hash_entry *h,
4026 Elf_Internal_Sym *sym)
4027 {
4028 if (h != NULL)
4029 {
4030 switch (ELF32_R_TYPE (rel->r_info))
4031 {
4032 case R_PPC_GNU_VTINHERIT:
4033 case R_PPC_GNU_VTENTRY:
4034 break;
4035
4036 default:
4037 switch (h->root.type)
4038 {
4039 case bfd_link_hash_defined:
4040 case bfd_link_hash_defweak:
4041 return h->root.u.def.section;
4042
4043 case bfd_link_hash_common:
4044 return h->root.u.c.p->section;
4045
4046 default:
4047 break;
4048 }
4049 }
4050 }
4051 else
4052 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4053
4054 return NULL;
4055 }
4056
4057 /* Update the got, plt and dynamic reloc reference counts for the
4058 section being removed. */
4059
4060 static bfd_boolean
4061 ppc_elf_gc_sweep_hook (bfd *abfd,
4062 struct bfd_link_info *info,
4063 asection *sec,
4064 const Elf_Internal_Rela *relocs)
4065 {
4066 struct ppc_elf_link_hash_table *htab;
4067 Elf_Internal_Shdr *symtab_hdr;
4068 struct elf_link_hash_entry **sym_hashes;
4069 bfd_signed_vma *local_got_refcounts;
4070 const Elf_Internal_Rela *rel, *relend;
4071
4072 elf_section_data (sec)->local_dynrel = NULL;
4073
4074 htab = ppc_elf_hash_table (info);
4075 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4076 sym_hashes = elf_sym_hashes (abfd);
4077 local_got_refcounts = elf_local_got_refcounts (abfd);
4078
4079 relend = relocs + sec->reloc_count;
4080 for (rel = relocs; rel < relend; rel++)
4081 {
4082 unsigned long r_symndx;
4083 enum elf_ppc_reloc_type r_type;
4084 struct elf_link_hash_entry *h = NULL;
4085
4086 r_symndx = ELF32_R_SYM (rel->r_info);
4087 if (r_symndx >= symtab_hdr->sh_info)
4088 {
4089 struct ppc_elf_dyn_relocs **pp, *p;
4090 struct ppc_elf_link_hash_entry *eh;
4091
4092 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4093 eh = (struct ppc_elf_link_hash_entry *) h;
4094
4095 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4096 if (p->sec == sec)
4097 {
4098 /* Everything must go for SEC. */
4099 *pp = p->next;
4100 break;
4101 }
4102 }
4103
4104 r_type = ELF32_R_TYPE (rel->r_info);
4105 switch (r_type)
4106 {
4107 case R_PPC_GOT_TLSLD16:
4108 case R_PPC_GOT_TLSLD16_LO:
4109 case R_PPC_GOT_TLSLD16_HI:
4110 case R_PPC_GOT_TLSLD16_HA:
4111 htab->tlsld_got.refcount -= 1;
4112 /* Fall thru */
4113
4114 case R_PPC_GOT_TLSGD16:
4115 case R_PPC_GOT_TLSGD16_LO:
4116 case R_PPC_GOT_TLSGD16_HI:
4117 case R_PPC_GOT_TLSGD16_HA:
4118 case R_PPC_GOT_TPREL16:
4119 case R_PPC_GOT_TPREL16_LO:
4120 case R_PPC_GOT_TPREL16_HI:
4121 case R_PPC_GOT_TPREL16_HA:
4122 case R_PPC_GOT_DTPREL16:
4123 case R_PPC_GOT_DTPREL16_LO:
4124 case R_PPC_GOT_DTPREL16_HI:
4125 case R_PPC_GOT_DTPREL16_HA:
4126 case R_PPC_GOT16:
4127 case R_PPC_GOT16_LO:
4128 case R_PPC_GOT16_HI:
4129 case R_PPC_GOT16_HA:
4130 if (h != NULL)
4131 {
4132 if (h->got.refcount > 0)
4133 h->got.refcount--;
4134 }
4135 else if (local_got_refcounts != NULL)
4136 {
4137 if (local_got_refcounts[r_symndx] > 0)
4138 local_got_refcounts[r_symndx]--;
4139 }
4140 break;
4141
4142 case R_PPC_REL24:
4143 case R_PPC_REL14:
4144 case R_PPC_REL14_BRTAKEN:
4145 case R_PPC_REL14_BRNTAKEN:
4146 case R_PPC_REL32:
4147 if (h == NULL
4148 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4149 break;
4150 /* Fall thru */
4151
4152 case R_PPC_ADDR32:
4153 case R_PPC_ADDR24:
4154 case R_PPC_ADDR16:
4155 case R_PPC_ADDR16_LO:
4156 case R_PPC_ADDR16_HI:
4157 case R_PPC_ADDR16_HA:
4158 case R_PPC_ADDR14:
4159 case R_PPC_ADDR14_BRTAKEN:
4160 case R_PPC_ADDR14_BRNTAKEN:
4161 case R_PPC_UADDR32:
4162 case R_PPC_UADDR16:
4163 case R_PPC_PLT32:
4164 case R_PPC_PLTREL24:
4165 case R_PPC_PLT16_LO:
4166 case R_PPC_PLT16_HI:
4167 case R_PPC_PLT16_HA:
4168 if (h != NULL)
4169 {
4170 if (h->plt.refcount > 0)
4171 h->plt.refcount--;
4172 }
4173 break;
4174
4175 default:
4176 break;
4177 }
4178 }
4179 return TRUE;
4180 }
4181
4182 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4183
4184 asection *
4185 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4186 {
4187 struct ppc_elf_link_hash_table *htab;
4188
4189 htab = ppc_elf_hash_table (info);
4190 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4191 FALSE, FALSE, TRUE);
4192
4193 return _bfd_elf_tls_setup (obfd, info);
4194 }
4195
4196 /* Run through all the TLS relocs looking for optimization
4197 opportunities. */
4198
4199 bfd_boolean
4200 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4201 struct bfd_link_info *info)
4202 {
4203 bfd *ibfd;
4204 asection *sec;
4205 struct ppc_elf_link_hash_table *htab;
4206
4207 if (info->relocatable || info->shared)
4208 return TRUE;
4209
4210 htab = ppc_elf_hash_table (info);
4211 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4212 {
4213 Elf_Internal_Sym *locsyms = NULL;
4214 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4215
4216 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4217 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4218 {
4219 Elf_Internal_Rela *relstart, *rel, *relend;
4220 int expecting_tls_get_addr;
4221
4222 /* Read the relocations. */
4223 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4224 info->keep_memory);
4225 if (relstart == NULL)
4226 return FALSE;
4227
4228 expecting_tls_get_addr = 0;
4229 relend = relstart + sec->reloc_count;
4230 for (rel = relstart; rel < relend; rel++)
4231 {
4232 enum elf_ppc_reloc_type r_type;
4233 unsigned long r_symndx;
4234 struct elf_link_hash_entry *h = NULL;
4235 char *tls_mask;
4236 char tls_set, tls_clear;
4237 bfd_boolean is_local;
4238
4239 r_symndx = ELF32_R_SYM (rel->r_info);
4240 if (r_symndx >= symtab_hdr->sh_info)
4241 {
4242 struct elf_link_hash_entry **sym_hashes;
4243
4244 sym_hashes = elf_sym_hashes (ibfd);
4245 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4246 while (h->root.type == bfd_link_hash_indirect
4247 || h->root.type == bfd_link_hash_warning)
4248 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4249 }
4250
4251 is_local = FALSE;
4252 if (h == NULL
4253 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
4254 is_local = TRUE;
4255
4256 r_type = ELF32_R_TYPE (rel->r_info);
4257 switch (r_type)
4258 {
4259 case R_PPC_GOT_TLSLD16:
4260 case R_PPC_GOT_TLSLD16_LO:
4261 case R_PPC_GOT_TLSLD16_HI:
4262 case R_PPC_GOT_TLSLD16_HA:
4263 /* These relocs should never be against a symbol
4264 defined in a shared lib. Leave them alone if
4265 that turns out to be the case. */
4266 expecting_tls_get_addr = 0;
4267 htab->tlsld_got.refcount -= 1;
4268 if (!is_local)
4269 continue;
4270
4271 /* LD -> LE */
4272 tls_set = 0;
4273 tls_clear = TLS_LD;
4274 expecting_tls_get_addr = 1;
4275 break;
4276
4277 case R_PPC_GOT_TLSGD16:
4278 case R_PPC_GOT_TLSGD16_LO:
4279 case R_PPC_GOT_TLSGD16_HI:
4280 case R_PPC_GOT_TLSGD16_HA:
4281 if (is_local)
4282 /* GD -> LE */
4283 tls_set = 0;
4284 else
4285 /* GD -> IE */
4286 tls_set = TLS_TLS | TLS_TPRELGD;
4287 tls_clear = TLS_GD;
4288 expecting_tls_get_addr = 1;
4289 break;
4290
4291 case R_PPC_GOT_TPREL16:
4292 case R_PPC_GOT_TPREL16_LO:
4293 case R_PPC_GOT_TPREL16_HI:
4294 case R_PPC_GOT_TPREL16_HA:
4295 expecting_tls_get_addr = 0;
4296 if (is_local)
4297 {
4298 /* IE -> LE */
4299 tls_set = 0;
4300 tls_clear = TLS_TPREL;
4301 break;
4302 }
4303 else
4304 continue;
4305
4306 case R_PPC_REL14:
4307 case R_PPC_REL14_BRTAKEN:
4308 case R_PPC_REL14_BRNTAKEN:
4309 case R_PPC_REL24:
4310 if (expecting_tls_get_addr
4311 && h != NULL
4312 && h == htab->tls_get_addr)
4313 {
4314 if (h->plt.refcount > 0)
4315 h->plt.refcount -= 1;
4316 }
4317 expecting_tls_get_addr = 0;
4318 continue;
4319
4320 default:
4321 expecting_tls_get_addr = 0;
4322 continue;
4323 }
4324
4325 if (h != NULL)
4326 {
4327 if (tls_set == 0)
4328 {
4329 /* We managed to get rid of a got entry. */
4330 if (h->got.refcount > 0)
4331 h->got.refcount -= 1;
4332 }
4333 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4334 }
4335 else
4336 {
4337 Elf_Internal_Sym *sym;
4338 bfd_signed_vma *lgot_refs;
4339 char *lgot_masks;
4340
4341 if (locsyms == NULL)
4342 {
4343 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4344 if (locsyms == NULL)
4345 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4346 symtab_hdr->sh_info,
4347 0, NULL, NULL, NULL);
4348 if (locsyms == NULL)
4349 {
4350 if (elf_section_data (sec)->relocs != relstart)
4351 free (relstart);
4352 return FALSE;
4353 }
4354 }
4355 sym = locsyms + r_symndx;
4356 lgot_refs = elf_local_got_refcounts (ibfd);
4357 if (lgot_refs == NULL)
4358 abort ();
4359 if (tls_set == 0)
4360 {
4361 /* We managed to get rid of a got entry. */
4362 if (lgot_refs[r_symndx] > 0)
4363 lgot_refs[r_symndx] -= 1;
4364 }
4365 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4366 tls_mask = &lgot_masks[r_symndx];
4367 }
4368
4369 *tls_mask |= tls_set;
4370 *tls_mask &= ~tls_clear;
4371 }
4372
4373 if (elf_section_data (sec)->relocs != relstart)
4374 free (relstart);
4375 }
4376
4377 if (locsyms != NULL
4378 && (symtab_hdr->contents != (unsigned char *) locsyms))
4379 {
4380 if (!info->keep_memory)
4381 free (locsyms);
4382 else
4383 symtab_hdr->contents = (unsigned char *) locsyms;
4384 }
4385 }
4386 return TRUE;
4387 }
4388 \f
4389 /* Hook called by the linker routine which adds symbols from an object
4390 file. We use it to put .comm items in .sbss, and not .bss. */
4391
4392 static bfd_boolean
4393 ppc_elf_add_symbol_hook (bfd *abfd,
4394 struct bfd_link_info *info,
4395 Elf_Internal_Sym *sym,
4396 const char **namep ATTRIBUTE_UNUSED,
4397 flagword *flagsp ATTRIBUTE_UNUSED,
4398 asection **secp,
4399 bfd_vma *valp)
4400 {
4401 if (sym->st_shndx == SHN_COMMON
4402 && !info->relocatable
4403 && sym->st_size <= elf_gp_size (abfd)
4404 && (info->hash->creator == abfd->xvec
4405 || info->hash->creator == abfd->xvec->alternative_target))
4406 {
4407 /* Common symbols less than or equal to -G nn bytes are automatically
4408 put into .sbss. */
4409 struct ppc_elf_link_hash_table *htab;
4410
4411 htab = ppc_elf_hash_table (info);
4412 if (htab->sbss == NULL)
4413 {
4414 flagword flags = SEC_IS_COMMON;
4415
4416 htab->sbss = bfd_make_section_anyway (abfd, ".sbss");
4417 if (htab->sbss == NULL
4418 || ! bfd_set_section_flags (abfd, htab->sbss, flags))
4419 return FALSE;
4420 }
4421
4422 *secp = htab->sbss;
4423 *valp = sym->st_size;
4424 }
4425
4426 return TRUE;
4427 }
4428 \f
4429 /* Finish up dynamic symbol handling. We set the contents of various
4430 dynamic sections here. */
4431
4432 static bfd_boolean
4433 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
4434 struct bfd_link_info *info,
4435 struct elf_link_hash_entry *h,
4436 Elf_Internal_Sym *sym)
4437 {
4438 struct ppc_elf_link_hash_table *htab;
4439
4440 #ifdef DEBUG
4441 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
4442 h->root.root.string);
4443 #endif
4444
4445 htab = ppc_elf_hash_table (info);
4446 BFD_ASSERT (htab->elf.dynobj != NULL);
4447
4448 if (h->plt.offset != (bfd_vma) -1)
4449 {
4450 Elf_Internal_Rela rela;
4451 bfd_byte *loc;
4452 bfd_vma reloc_index;
4453
4454 #ifdef DEBUG
4455 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
4456 #endif
4457
4458 /* This symbol has an entry in the procedure linkage table. Set
4459 it up. */
4460
4461 BFD_ASSERT (h->dynindx != -1);
4462 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
4463
4464 /* We don't need to fill in the .plt. The ppc dynamic linker
4465 will fill it in. */
4466
4467 /* Fill in the entry in the .rela.plt section. */
4468 rela.r_offset = (htab->plt->output_section->vma
4469 + htab->plt->output_offset
4470 + h->plt.offset);
4471 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
4472 rela.r_addend = 0;
4473
4474 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
4475 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
4476 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
4477 loc = (htab->relplt->contents
4478 + reloc_index * sizeof (Elf32_External_Rela));
4479 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4480
4481 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4482 {
4483 /* Mark the symbol as undefined, rather than as defined in
4484 the .plt section. Leave the value alone. */
4485 sym->st_shndx = SHN_UNDEF;
4486 /* If the symbol is weak, we do need to clear the value.
4487 Otherwise, the PLT entry would provide a definition for
4488 the symbol even if the symbol wasn't defined anywhere,
4489 and so the symbol would never be NULL. */
4490 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
4491 == 0)
4492 sym->st_value = 0;
4493 }
4494 }
4495
4496 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4497 {
4498 asection *s;
4499 Elf_Internal_Rela rela;
4500 bfd_byte *loc;
4501
4502 /* This symbols needs a copy reloc. Set it up. */
4503
4504 #ifdef DEBUG
4505 fprintf (stderr, ", copy");
4506 #endif
4507
4508 BFD_ASSERT (h->dynindx != -1);
4509
4510 if (h->size <= elf_gp_size (htab->elf.dynobj))
4511 s = htab->relsbss;
4512 else
4513 s = htab->relbss;
4514 BFD_ASSERT (s != NULL);
4515
4516 rela.r_offset = (h->root.u.def.value
4517 + h->root.u.def.section->output_section->vma
4518 + h->root.u.def.section->output_offset);
4519 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
4520 rela.r_addend = 0;
4521 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4522 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4523 }
4524
4525 #ifdef DEBUG
4526 fprintf (stderr, "\n");
4527 #endif
4528
4529 /* Mark some specially defined symbols as absolute. */
4530 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4531 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
4532 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
4533 sym->st_shndx = SHN_ABS;
4534
4535 return TRUE;
4536 }
4537 \f
4538 /* Finish up the dynamic sections. */
4539
4540 static bfd_boolean
4541 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
4542 struct bfd_link_info *info)
4543 {
4544 asection *sdyn;
4545 struct ppc_elf_link_hash_table *htab;
4546
4547 #ifdef DEBUG
4548 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
4549 #endif
4550
4551 htab = ppc_elf_hash_table (info);
4552 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
4553
4554 if (htab->elf.dynamic_sections_created)
4555 {
4556 Elf32_External_Dyn *dyncon, *dynconend;
4557
4558 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
4559
4560 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4561 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4562 for (; dyncon < dynconend; dyncon++)
4563 {
4564 Elf_Internal_Dyn dyn;
4565 asection *s;
4566
4567 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
4568
4569 switch (dyn.d_tag)
4570 {
4571 case DT_PLTGOT:
4572 s = htab->plt;
4573 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4574 break;
4575
4576 case DT_PLTRELSZ:
4577 dyn.d_un.d_val = htab->relplt->size;
4578 break;
4579
4580 case DT_JMPREL:
4581 s = htab->relplt;
4582 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4583 break;
4584
4585 default:
4586 continue;
4587 }
4588
4589 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4590 }
4591 }
4592
4593 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
4594 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
4595 if (htab->got)
4596 {
4597 unsigned char *contents = htab->got->contents;
4598 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
4599
4600 if (sdyn == NULL)
4601 bfd_put_32 (output_bfd, 0, contents + 4);
4602 else
4603 bfd_put_32 (output_bfd,
4604 sdyn->output_section->vma + sdyn->output_offset,
4605 contents + 4);
4606
4607 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
4608 }
4609
4610 return TRUE;
4611 }
4612 \f
4613 /* The RELOCATE_SECTION function is called by the ELF backend linker
4614 to handle the relocations for a section.
4615
4616 The relocs are always passed as Rela structures; if the section
4617 actually uses Rel structures, the r_addend field will always be
4618 zero.
4619
4620 This function is responsible for adjust the section contents as
4621 necessary, and (if using Rela relocs and generating a
4622 relocatable output file) adjusting the reloc addend as
4623 necessary.
4624
4625 This function does not have to worry about setting the reloc
4626 address or the reloc symbol index.
4627
4628 LOCAL_SYMS is a pointer to the swapped in local symbols.
4629
4630 LOCAL_SECTIONS is an array giving the section in the input file
4631 corresponding to the st_shndx field of each local symbol.
4632
4633 The global hash table entry for the global symbols can be found
4634 via elf_sym_hashes (input_bfd).
4635
4636 When generating relocatable output, this function must handle
4637 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
4638 going to be the section symbol corresponding to the output
4639 section, which means that the addend must be adjusted
4640 accordingly. */
4641
4642 static bfd_boolean
4643 ppc_elf_relocate_section (bfd *output_bfd,
4644 struct bfd_link_info *info,
4645 bfd *input_bfd,
4646 asection *input_section,
4647 bfd_byte *contents,
4648 Elf_Internal_Rela *relocs,
4649 Elf_Internal_Sym *local_syms,
4650 asection **local_sections)
4651 {
4652 Elf_Internal_Shdr *symtab_hdr;
4653 struct elf_link_hash_entry **sym_hashes;
4654 struct ppc_elf_link_hash_table *htab;
4655 Elf_Internal_Rela *rel;
4656 Elf_Internal_Rela *relend;
4657 Elf_Internal_Rela outrel;
4658 bfd_byte *loc;
4659 asection *sreloc = NULL;
4660 bfd_vma *local_got_offsets;
4661 bfd_boolean ret = TRUE;
4662
4663 #ifdef DEBUG
4664 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
4665 "%ld relocations%s",
4666 input_bfd, input_section,
4667 (long) input_section->reloc_count,
4668 (info->relocatable) ? " (relocatable)" : "");
4669 #endif
4670
4671 if (info->relocatable)
4672 return TRUE;
4673
4674 /* Initialize howto table if not already done. */
4675 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4676 ppc_elf_howto_init ();
4677
4678 htab = ppc_elf_hash_table (info);
4679 local_got_offsets = elf_local_got_offsets (input_bfd);
4680 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4681 sym_hashes = elf_sym_hashes (input_bfd);
4682 rel = relocs;
4683 relend = relocs + input_section->reloc_count;
4684 for (; rel < relend; rel++)
4685 {
4686 enum elf_ppc_reloc_type r_type;
4687 bfd_vma addend;
4688 bfd_reloc_status_type r;
4689 Elf_Internal_Sym *sym;
4690 asection *sec;
4691 struct elf_link_hash_entry *h;
4692 const char *sym_name;
4693 reloc_howto_type *howto;
4694 unsigned long r_symndx;
4695 bfd_vma relocation;
4696 bfd_vma branch_bit, insn, from;
4697 bfd_boolean unresolved_reloc;
4698 bfd_boolean warned;
4699 unsigned int tls_type, tls_mask, tls_gd;
4700
4701 r_type = ELF32_R_TYPE (rel->r_info);
4702 sym = NULL;
4703 sec = NULL;
4704 h = NULL;
4705 unresolved_reloc = FALSE;
4706 warned = FALSE;
4707 r_symndx = ELF32_R_SYM (rel->r_info);
4708
4709 if (r_symndx < symtab_hdr->sh_info)
4710 {
4711 sym = local_syms + r_symndx;
4712 sec = local_sections[r_symndx];
4713 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
4714
4715 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4716 }
4717 else
4718 {
4719 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4720 r_symndx, symtab_hdr, sym_hashes,
4721 h, sec, relocation,
4722 unresolved_reloc, warned);
4723
4724 sym_name = h->root.root.string;
4725 }
4726
4727 /* TLS optimizations. Replace instruction sequences and relocs
4728 based on information we collected in tls_optimize. We edit
4729 RELOCS so that --emit-relocs will output something sensible
4730 for the final instruction stream. */
4731 tls_mask = 0;
4732 tls_gd = 0;
4733 if (IS_PPC_TLS_RELOC (r_type))
4734 {
4735 if (h != NULL)
4736 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
4737 else if (local_got_offsets != NULL)
4738 {
4739 char *lgot_masks;
4740 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
4741 tls_mask = lgot_masks[r_symndx];
4742 }
4743 }
4744
4745 /* Ensure reloc mapping code below stays sane. */
4746 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
4747 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
4748 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
4749 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
4750 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
4751 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
4752 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
4753 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
4754 abort ();
4755 switch (r_type)
4756 {
4757 default:
4758 break;
4759
4760 case R_PPC_GOT_TPREL16:
4761 case R_PPC_GOT_TPREL16_LO:
4762 if (tls_mask != 0
4763 && (tls_mask & TLS_TPREL) == 0)
4764 {
4765 bfd_vma insn;
4766 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
4767 insn &= 31 << 21;
4768 insn |= 0x3c020000; /* addis 0,2,0 */
4769 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
4770 r_type = R_PPC_TPREL16_HA;
4771 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4772 }
4773 break;
4774
4775 case R_PPC_TLS:
4776 if (tls_mask != 0
4777 && (tls_mask & TLS_TPREL) == 0)
4778 {
4779 bfd_vma insn, rtra;
4780 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4781 if ((insn & ((31 << 26) | (31 << 11)))
4782 == ((31 << 26) | (2 << 11)))
4783 rtra = insn & ((1 << 26) - (1 << 16));
4784 else if ((insn & ((31 << 26) | (31 << 16)))
4785 == ((31 << 26) | (2 << 16)))
4786 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
4787 else
4788 abort ();
4789 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
4790 /* add -> addi. */
4791 insn = 14 << 26;
4792 else if ((insn & (31 << 1)) == 23 << 1
4793 && ((insn & (31 << 6)) < 14 << 6
4794 || ((insn & (31 << 6)) >= 16 << 6
4795 && (insn & (31 << 6)) < 24 << 6)))
4796 /* load and store indexed -> dform. */
4797 insn = (32 | ((insn >> 6) & 31)) << 26;
4798 else if ((insn & (31 << 1)) == 21 << 1
4799 && (insn & (0x1a << 6)) == 0)
4800 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
4801 insn = (((58 | ((insn >> 6) & 4)) << 26)
4802 | ((insn >> 6) & 1));
4803 else if ((insn & (31 << 1)) == 21 << 1
4804 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
4805 /* lwax -> lwa. */
4806 insn = (58 << 26) | 2;
4807 else
4808 abort ();
4809 insn |= rtra;
4810 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4811 r_type = R_PPC_TPREL16_LO;
4812 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4813 /* Was PPC_TLS which sits on insn boundary, now
4814 PPC_TPREL16_LO which is at insn+2. */
4815 rel->r_offset += 2;
4816 }
4817 break;
4818
4819 case R_PPC_GOT_TLSGD16_HI:
4820 case R_PPC_GOT_TLSGD16_HA:
4821 tls_gd = TLS_TPRELGD;
4822 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4823 goto tls_gdld_hi;
4824 break;
4825
4826 case R_PPC_GOT_TLSLD16_HI:
4827 case R_PPC_GOT_TLSLD16_HA:
4828 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4829 {
4830 tls_gdld_hi:
4831 if ((tls_mask & tls_gd) != 0)
4832 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4833 + R_PPC_GOT_TPREL16);
4834 else
4835 {
4836 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
4837 rel->r_offset -= 2;
4838 r_type = R_PPC_NONE;
4839 }
4840 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4841 }
4842 break;
4843
4844 case R_PPC_GOT_TLSGD16:
4845 case R_PPC_GOT_TLSGD16_LO:
4846 tls_gd = TLS_TPRELGD;
4847 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4848 goto tls_get_addr_check;
4849 break;
4850
4851 case R_PPC_GOT_TLSLD16:
4852 case R_PPC_GOT_TLSLD16_LO:
4853 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4854 {
4855 tls_get_addr_check:
4856 if (rel + 1 < relend)
4857 {
4858 enum elf_ppc_reloc_type r_type2;
4859 unsigned long r_symndx2;
4860 struct elf_link_hash_entry *h2;
4861 bfd_vma insn1, insn2;
4862 bfd_vma offset;
4863
4864 /* The next instruction should be a call to
4865 __tls_get_addr. Peek at the reloc to be sure. */
4866 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4867 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4868 if (r_symndx2 < symtab_hdr->sh_info
4869 || (r_type2 != R_PPC_REL14
4870 && r_type2 != R_PPC_REL14_BRTAKEN
4871 && r_type2 != R_PPC_REL14_BRNTAKEN
4872 && r_type2 != R_PPC_REL24
4873 && r_type2 != R_PPC_PLTREL24))
4874 break;
4875
4876 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4877 while (h2->root.type == bfd_link_hash_indirect
4878 || h2->root.type == bfd_link_hash_warning)
4879 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
4880 if (h2 == NULL || h2 != htab->tls_get_addr)
4881 break;
4882
4883 /* OK, it checks out. Replace the call. */
4884 offset = rel[1].r_offset;
4885 insn1 = bfd_get_32 (output_bfd,
4886 contents + rel->r_offset - 2);
4887 if ((tls_mask & tls_gd) != 0)
4888 {
4889 /* IE */
4890 insn1 &= (1 << 26) - 1;
4891 insn1 |= 32 << 26; /* lwz */
4892 insn2 = 0x7c631214; /* add 3,3,2 */
4893 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
4894 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4895 + R_PPC_GOT_TPREL16);
4896 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4897 }
4898 else
4899 {
4900 /* LE */
4901 insn1 = 0x3c620000; /* addis 3,2,0 */
4902 insn2 = 0x38630000; /* addi 3,3,0 */
4903 if (tls_gd == 0)
4904 {
4905 /* Was an LD reloc. */
4906 r_symndx = 0;
4907 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4908 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4909 }
4910 r_type = R_PPC_TPREL16_HA;
4911 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4912 rel[1].r_info = ELF32_R_INFO (r_symndx,
4913 R_PPC_TPREL16_LO);
4914 rel[1].r_offset += 2;
4915 }
4916 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
4917 bfd_put_32 (output_bfd, insn2, contents + offset);
4918 if (tls_gd == 0)
4919 {
4920 /* We changed the symbol on an LD reloc. Start over
4921 in order to get h, sym, sec etc. right. */
4922 rel--;
4923 continue;
4924 }
4925 }
4926 }
4927 break;
4928 }
4929
4930 /* Handle other relocations that tweak non-addend part of insn. */
4931 branch_bit = 0;
4932 switch (r_type)
4933 {
4934 default:
4935 break;
4936
4937 /* Branch taken prediction relocations. */
4938 case R_PPC_ADDR14_BRTAKEN:
4939 case R_PPC_REL14_BRTAKEN:
4940 branch_bit = BRANCH_PREDICT_BIT;
4941 /* Fall thru */
4942
4943 /* Branch not taken prediction relocations. */
4944 case R_PPC_ADDR14_BRNTAKEN:
4945 case R_PPC_REL14_BRNTAKEN:
4946 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4947 insn &= ~BRANCH_PREDICT_BIT;
4948 insn |= branch_bit;
4949
4950 from = (rel->r_offset
4951 + input_section->output_offset
4952 + input_section->output_section->vma);
4953
4954 /* Invert 'y' bit if not the default. */
4955 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
4956 insn ^= BRANCH_PREDICT_BIT;
4957
4958 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4959 break;
4960 }
4961
4962 addend = rel->r_addend;
4963 tls_type = 0;
4964 howto = NULL;
4965 if (r_type < R_PPC_max)
4966 howto = ppc_elf_howto_table[r_type];
4967 switch (r_type)
4968 {
4969 default:
4970 (*_bfd_error_handler)
4971 (_("%B: unknown relocation type %d for symbol %s"),
4972 input_bfd, (int) r_type, sym_name);
4973
4974 bfd_set_error (bfd_error_bad_value);
4975 ret = FALSE;
4976 continue;
4977
4978 case R_PPC_NONE:
4979 case R_PPC_TLS:
4980 case R_PPC_EMB_MRKREF:
4981 case R_PPC_GNU_VTINHERIT:
4982 case R_PPC_GNU_VTENTRY:
4983 continue;
4984
4985 /* GOT16 relocations. Like an ADDR16 using the symbol's
4986 address in the GOT as relocation value instead of the
4987 symbol's value itself. Also, create a GOT entry for the
4988 symbol and put the symbol value there. */
4989 case R_PPC_GOT_TLSGD16:
4990 case R_PPC_GOT_TLSGD16_LO:
4991 case R_PPC_GOT_TLSGD16_HI:
4992 case R_PPC_GOT_TLSGD16_HA:
4993 tls_type = TLS_TLS | TLS_GD;
4994 goto dogot;
4995
4996 case R_PPC_GOT_TLSLD16:
4997 case R_PPC_GOT_TLSLD16_LO:
4998 case R_PPC_GOT_TLSLD16_HI:
4999 case R_PPC_GOT_TLSLD16_HA:
5000 tls_type = TLS_TLS | TLS_LD;
5001 goto dogot;
5002
5003 case R_PPC_GOT_TPREL16:
5004 case R_PPC_GOT_TPREL16_LO:
5005 case R_PPC_GOT_TPREL16_HI:
5006 case R_PPC_GOT_TPREL16_HA:
5007 tls_type = TLS_TLS | TLS_TPREL;
5008 goto dogot;
5009
5010 case R_PPC_GOT_DTPREL16:
5011 case R_PPC_GOT_DTPREL16_LO:
5012 case R_PPC_GOT_DTPREL16_HI:
5013 case R_PPC_GOT_DTPREL16_HA:
5014 tls_type = TLS_TLS | TLS_DTPREL;
5015 goto dogot;
5016
5017 case R_PPC_GOT16:
5018 case R_PPC_GOT16_LO:
5019 case R_PPC_GOT16_HI:
5020 case R_PPC_GOT16_HA:
5021 dogot:
5022 {
5023 /* Relocation is to the entry for this symbol in the global
5024 offset table. */
5025 bfd_vma off;
5026 bfd_vma *offp;
5027 unsigned long indx;
5028
5029 if (htab->got == NULL)
5030 abort ();
5031
5032 indx = 0;
5033 if (tls_type == (TLS_TLS | TLS_LD)
5034 && (h == NULL
5035 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
5036 offp = &htab->tlsld_got.offset;
5037 else if (h != NULL)
5038 {
5039 bfd_boolean dyn;
5040 dyn = htab->elf.dynamic_sections_created;
5041 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5042 || (info->shared
5043 && SYMBOL_REFERENCES_LOCAL (info, h)))
5044 /* This is actually a static link, or it is a
5045 -Bsymbolic link and the symbol is defined
5046 locally, or the symbol was forced to be local
5047 because of a version file. */
5048 ;
5049 else
5050 {
5051 indx = h->dynindx;
5052 unresolved_reloc = FALSE;
5053 }
5054 offp = &h->got.offset;
5055 }
5056 else
5057 {
5058 if (local_got_offsets == NULL)
5059 abort ();
5060 offp = &local_got_offsets[r_symndx];
5061 }
5062
5063 /* The offset must always be a multiple of 4. We use the
5064 least significant bit to record whether we have already
5065 processed this entry. */
5066 off = *offp;
5067 if ((off & 1) != 0)
5068 off &= ~1;
5069 else
5070 {
5071 unsigned int tls_m = (tls_mask
5072 & (TLS_LD | TLS_GD | TLS_DTPREL
5073 | TLS_TPREL | TLS_TPRELGD));
5074
5075 if (offp == &htab->tlsld_got.offset)
5076 tls_m = TLS_LD;
5077 else if (h == NULL
5078 || !(h->elf_link_hash_flags
5079 & ELF_LINK_HASH_DEF_DYNAMIC))
5080 tls_m &= ~TLS_LD;
5081
5082 /* We might have multiple got entries for this sym.
5083 Initialize them all. */
5084 do
5085 {
5086 int tls_ty = 0;
5087
5088 if ((tls_m & TLS_LD) != 0)
5089 {
5090 tls_ty = TLS_TLS | TLS_LD;
5091 tls_m &= ~TLS_LD;
5092 }
5093 else if ((tls_m & TLS_GD) != 0)
5094 {
5095 tls_ty = TLS_TLS | TLS_GD;
5096 tls_m &= ~TLS_GD;
5097 }
5098 else if ((tls_m & TLS_DTPREL) != 0)
5099 {
5100 tls_ty = TLS_TLS | TLS_DTPREL;
5101 tls_m &= ~TLS_DTPREL;
5102 }
5103 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5104 {
5105 tls_ty = TLS_TLS | TLS_TPREL;
5106 tls_m = 0;
5107 }
5108
5109 /* Generate relocs for the dynamic linker. */
5110 if ((info->shared || indx != 0)
5111 && (h == NULL
5112 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5113 || h->root.type != bfd_link_hash_undefweak))
5114 {
5115 outrel.r_offset = (htab->got->output_section->vma
5116 + htab->got->output_offset
5117 + off);
5118 outrel.r_addend = 0;
5119 if (tls_ty & (TLS_LD | TLS_GD))
5120 {
5121 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5122 if (tls_ty == (TLS_TLS | TLS_GD))
5123 {
5124 loc = htab->relgot->contents;
5125 loc += (htab->relgot->reloc_count++
5126 * sizeof (Elf32_External_Rela));
5127 bfd_elf32_swap_reloca_out (output_bfd,
5128 &outrel, loc);
5129 outrel.r_offset += 4;
5130 outrel.r_info
5131 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5132 }
5133 }
5134 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5135 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5136 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5137 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5138 else if (indx == 0)
5139 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5140 else
5141 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5142 if (indx == 0)
5143 {
5144 outrel.r_addend += relocation;
5145 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5146 outrel.r_addend -= htab->elf.tls_sec->vma;
5147 }
5148 loc = htab->relgot->contents;
5149 loc += (htab->relgot->reloc_count++
5150 * sizeof (Elf32_External_Rela));
5151 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5152 }
5153
5154 /* Init the .got section contents if we're not
5155 emitting a reloc. */
5156 else
5157 {
5158 bfd_vma value = relocation;
5159
5160 if (tls_ty == (TLS_TLS | TLS_LD))
5161 value = 1;
5162 else if (tls_ty != 0)
5163 {
5164 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
5165 if (tls_ty == (TLS_TLS | TLS_TPREL))
5166 value += DTP_OFFSET - TP_OFFSET;
5167
5168 if (tls_ty == (TLS_TLS | TLS_GD))
5169 {
5170 bfd_put_32 (output_bfd, value,
5171 htab->got->contents + off + 4);
5172 value = 1;
5173 }
5174 }
5175 bfd_put_32 (output_bfd, value,
5176 htab->got->contents + off);
5177 }
5178
5179 off += 4;
5180 if (tls_ty & (TLS_LD | TLS_GD))
5181 off += 4;
5182 }
5183 while (tls_m != 0);
5184
5185 off = *offp;
5186 *offp = off | 1;
5187 }
5188
5189 if (off >= (bfd_vma) -2)
5190 abort ();
5191
5192 if ((tls_type & TLS_TLS) != 0)
5193 {
5194 if (tls_type != (TLS_TLS | TLS_LD))
5195 {
5196 if ((tls_mask & TLS_LD) != 0
5197 && !(h == NULL
5198 || !(h->elf_link_hash_flags
5199 & ELF_LINK_HASH_DEF_DYNAMIC)))
5200 off += 8;
5201 if (tls_type != (TLS_TLS | TLS_GD))
5202 {
5203 if ((tls_mask & TLS_GD) != 0)
5204 off += 8;
5205 if (tls_type != (TLS_TLS | TLS_DTPREL))
5206 {
5207 if ((tls_mask & TLS_DTPREL) != 0)
5208 off += 4;
5209 }
5210 }
5211 }
5212 }
5213
5214 relocation = htab->got->output_offset + off - 4;
5215
5216 /* Addends on got relocations don't make much sense.
5217 x+off@got is actually x@got+off, and since the got is
5218 generated by a hash table traversal, the value in the
5219 got at entry m+n bears little relation to the entry m. */
5220 if (addend != 0)
5221 (*_bfd_error_handler)
5222 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
5223 input_bfd,
5224 input_section,
5225 (long) rel->r_offset,
5226 howto->name,
5227 sym_name);
5228 }
5229 break;
5230
5231 /* Relocations that need no special processing. */
5232 case R_PPC_LOCAL24PC:
5233 /* It makes no sense to point a local relocation
5234 at a symbol not in this object. */
5235 if (unresolved_reloc)
5236 {
5237 if (! (*info->callbacks->undefined_symbol) (info,
5238 h->root.root.string,
5239 input_bfd,
5240 input_section,
5241 rel->r_offset,
5242 TRUE))
5243 return FALSE;
5244 continue;
5245 }
5246 break;
5247
5248 case R_PPC_DTPREL16:
5249 case R_PPC_DTPREL16_LO:
5250 case R_PPC_DTPREL16_HI:
5251 case R_PPC_DTPREL16_HA:
5252 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5253 break;
5254
5255 /* Relocations that may need to be propagated if this is a shared
5256 object. */
5257 case R_PPC_TPREL16:
5258 case R_PPC_TPREL16_LO:
5259 case R_PPC_TPREL16_HI:
5260 case R_PPC_TPREL16_HA:
5261 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5262 /* The TPREL16 relocs shouldn't really be used in shared
5263 libs as they will result in DT_TEXTREL being set, but
5264 support them anyway. */
5265 goto dodyn;
5266
5267 case R_PPC_TPREL32:
5268 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5269 goto dodyn;
5270
5271 case R_PPC_DTPREL32:
5272 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5273 goto dodyn;
5274
5275 case R_PPC_DTPMOD32:
5276 relocation = 1;
5277 addend = 0;
5278 goto dodyn;
5279
5280 case R_PPC_REL24:
5281 case R_PPC_REL32:
5282 case R_PPC_REL14:
5283 case R_PPC_REL14_BRTAKEN:
5284 case R_PPC_REL14_BRNTAKEN:
5285 /* If these relocations are not to a named symbol, they can be
5286 handled right here, no need to bother the dynamic linker. */
5287 if (SYMBOL_REFERENCES_LOCAL (info, h)
5288 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5289 break;
5290 /* fall through */
5291
5292 /* Relocations that always need to be propagated if this is a shared
5293 object. */
5294 case R_PPC_ADDR32:
5295 case R_PPC_ADDR24:
5296 case R_PPC_ADDR16:
5297 case R_PPC_ADDR16_LO:
5298 case R_PPC_ADDR16_HI:
5299 case R_PPC_ADDR16_HA:
5300 case R_PPC_ADDR14:
5301 case R_PPC_ADDR14_BRTAKEN:
5302 case R_PPC_ADDR14_BRNTAKEN:
5303 case R_PPC_UADDR32:
5304 case R_PPC_UADDR16:
5305 /* r_symndx will be zero only for relocs against symbols
5306 from removed linkonce sections, or sections discarded by
5307 a linker script. */
5308 dodyn:
5309 if (r_symndx == 0)
5310 break;
5311 /* Fall thru. */
5312
5313 if ((info->shared
5314 && (h == NULL
5315 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5316 || h->root.type != bfd_link_hash_undefweak)
5317 && (MUST_BE_DYN_RELOC (r_type)
5318 || !SYMBOL_CALLS_LOCAL (info, h)))
5319 || (ELIMINATE_COPY_RELOCS
5320 && !info->shared
5321 && (input_section->flags & SEC_ALLOC) != 0
5322 && h != NULL
5323 && h->dynindx != -1
5324 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5325 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5326 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
5327 {
5328 int skip;
5329
5330 #ifdef DEBUG
5331 fprintf (stderr, "ppc_elf_relocate_section needs to "
5332 "create relocation for %s\n",
5333 (h && h->root.root.string
5334 ? h->root.root.string : "<unknown>"));
5335 #endif
5336
5337 /* When generating a shared object, these relocations
5338 are copied into the output file to be resolved at run
5339 time. */
5340 if (sreloc == NULL)
5341 {
5342 const char *name;
5343
5344 name = (bfd_elf_string_from_elf_section
5345 (input_bfd,
5346 elf_elfheader (input_bfd)->e_shstrndx,
5347 elf_section_data (input_section)->rel_hdr.sh_name));
5348 if (name == NULL)
5349 return FALSE;
5350
5351 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
5352 && strcmp (bfd_get_section_name (input_bfd,
5353 input_section),
5354 name + 5) == 0);
5355
5356 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
5357 BFD_ASSERT (sreloc != NULL);
5358 }
5359
5360 skip = 0;
5361
5362 outrel.r_offset =
5363 _bfd_elf_section_offset (output_bfd, info, input_section,
5364 rel->r_offset);
5365 if (outrel.r_offset == (bfd_vma) -1
5366 || outrel.r_offset == (bfd_vma) -2)
5367 skip = (int) outrel.r_offset;
5368 outrel.r_offset += (input_section->output_section->vma
5369 + input_section->output_offset);
5370
5371 if (skip)
5372 memset (&outrel, 0, sizeof outrel);
5373 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
5374 {
5375 unresolved_reloc = FALSE;
5376 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5377 outrel.r_addend = rel->r_addend;
5378 }
5379 else
5380 {
5381 outrel.r_addend = relocation + rel->r_addend;
5382
5383 if (r_type == R_PPC_ADDR32)
5384 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
5385 else
5386 {
5387 long indx;
5388
5389 if (bfd_is_abs_section (sec))
5390 indx = 0;
5391 else if (sec == NULL || sec->owner == NULL)
5392 {
5393 bfd_set_error (bfd_error_bad_value);
5394 return FALSE;
5395 }
5396 else
5397 {
5398 asection *osec;
5399
5400 /* We are turning this relocation into one
5401 against a section symbol. It would be
5402 proper to subtract the symbol's value,
5403 osec->vma, from the emitted reloc addend,
5404 but ld.so expects buggy relocs. */
5405 osec = sec->output_section;
5406 indx = elf_section_data (osec)->dynindx;
5407 BFD_ASSERT (indx > 0);
5408 #ifdef DEBUG
5409 if (indx <= 0)
5410 printf ("indx=%d section=%s flags=%08x name=%s\n",
5411 indx, osec->name, osec->flags,
5412 h->root.root.string);
5413 #endif
5414 }
5415
5416 outrel.r_info = ELF32_R_INFO (indx, r_type);
5417 }
5418 }
5419
5420 loc = sreloc->contents;
5421 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5422 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5423
5424 if (skip == -1)
5425 continue;
5426
5427 /* This reloc will be computed at runtime. We clear the memory
5428 so that it contains predictable value. */
5429 if (! skip
5430 && ((input_section->flags & SEC_ALLOC) != 0
5431 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
5432 {
5433 relocation = howto->pc_relative ? outrel.r_offset : 0;
5434 addend = 0;
5435 break;
5436 }
5437 }
5438 break;
5439
5440 case R_PPC_RELAX32PC:
5441 relocation -= (input_section->output_section->vma
5442 + input_section->output_offset
5443 + rel->r_offset - 4);
5444 /* Fall thru */
5445 case R_PPC_RELAX32:
5446 {
5447 unsigned long t0;
5448 unsigned long t1;
5449
5450 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
5451 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
5452
5453 /* We're clearing the bits for R_PPC_ADDR16_HA
5454 and R_PPC_ADDR16_LO here. */
5455 t0 &= ~0xffff;
5456 t1 &= ~0xffff;
5457
5458 /* t0 is HA, t1 is LO */
5459 relocation += addend;
5460 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
5461 t1 |= relocation & 0xffff;
5462
5463 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
5464 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
5465 }
5466 continue;
5467
5468 /* Indirect .sdata relocation. */
5469 case R_PPC_EMB_SDAI16:
5470 BFD_ASSERT (htab->sdata != NULL);
5471 relocation
5472 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5473 htab->sdata, h, relocation,
5474 rel, R_PPC_RELATIVE);
5475 break;
5476
5477 /* Indirect .sdata2 relocation. */
5478 case R_PPC_EMB_SDA2I16:
5479 BFD_ASSERT (htab->sdata2 != NULL);
5480 relocation
5481 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5482 htab->sdata2, h, relocation,
5483 rel, R_PPC_RELATIVE);
5484 break;
5485
5486 /* Handle the TOC16 reloc. We want to use the offset within the .got
5487 section, not the actual VMA. This is appropriate when generating
5488 an embedded ELF object, for which the .got section acts like the
5489 AIX .toc section. */
5490 case R_PPC_TOC16: /* phony GOT16 relocations */
5491 BFD_ASSERT (sec != NULL);
5492 BFD_ASSERT (bfd_is_und_section (sec)
5493 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
5494 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)
5495
5496 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
5497 break;
5498
5499 case R_PPC_PLTREL24:
5500 /* Relocation is to the entry for this symbol in the
5501 procedure linkage table. */
5502 BFD_ASSERT (h != NULL);
5503
5504 if (h->plt.offset == (bfd_vma) -1
5505 || htab->plt == NULL)
5506 {
5507 /* We didn't make a PLT entry for this symbol. This
5508 happens when statically linking PIC code, or when
5509 using -Bsymbolic. */
5510 break;
5511 }
5512
5513 unresolved_reloc = FALSE;
5514 relocation = (htab->plt->output_section->vma
5515 + htab->plt->output_offset
5516 + h->plt.offset);
5517 break;
5518
5519 /* Relocate against _SDA_BASE_. */
5520 case R_PPC_SDAREL16:
5521 {
5522 const char *name;
5523 const struct elf_link_hash_entry *sh;
5524
5525 BFD_ASSERT (sec != NULL);
5526 name = bfd_get_section_name (abfd, sec->output_section);
5527 if (! ((strncmp (name, ".sdata", 6) == 0
5528 && (name[6] == 0 || name[6] == '.'))
5529 || (strncmp (name, ".sbss", 5) == 0
5530 && (name[5] == 0 || name[5] == '.'))))
5531 {
5532 (*_bfd_error_handler)
5533 (_("%B: the target (%s) of a %s relocation is "
5534 "in the wrong output section (%s)"),
5535 input_bfd,
5536 sym_name,
5537 howto->name,
5538 name);
5539 }
5540 sh = htab->sdata->sym_hash;
5541 addend -= (sh->root.u.def.value
5542 + sh->root.u.def.section->output_section->vma
5543 + sh->root.u.def.section->output_offset);
5544 }
5545 break;
5546
5547 /* Relocate against _SDA2_BASE_. */
5548 case R_PPC_EMB_SDA2REL:
5549 {
5550 const char *name;
5551 const struct elf_link_hash_entry *sh;
5552
5553 BFD_ASSERT (sec != NULL);
5554 name = bfd_get_section_name (abfd, sec->output_section);
5555 if (! (strncmp (name, ".sdata2", 7) == 0
5556 || strncmp (name, ".sbss2", 6) == 0))
5557 {
5558 (*_bfd_error_handler)
5559 (_("%B: the target (%s) of a %s relocation is "
5560 "in the wrong output section (%s)"),
5561 input_bfd,
5562 sym_name,
5563 howto->name,
5564 name);
5565
5566 bfd_set_error (bfd_error_bad_value);
5567 ret = FALSE;
5568 continue;
5569 }
5570 sh = htab->sdata2->sym_hash;
5571 addend -= (sh->root.u.def.value
5572 + sh->root.u.def.section->output_section->vma
5573 + sh->root.u.def.section->output_offset);
5574 }
5575 break;
5576
5577 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
5578 case R_PPC_EMB_SDA21:
5579 case R_PPC_EMB_RELSDA:
5580 {
5581 const char *name;
5582 const struct elf_link_hash_entry *sh;
5583 int reg;
5584
5585 BFD_ASSERT (sec != NULL);
5586 name = bfd_get_section_name (abfd, sec->output_section);
5587 if (((strncmp (name, ".sdata", 6) == 0
5588 && (name[6] == 0 || name[6] == '.'))
5589 || (strncmp (name, ".sbss", 5) == 0
5590 && (name[5] == 0 || name[5] == '.'))))
5591 {
5592 reg = 13;
5593 sh = htab->sdata->sym_hash;
5594 addend -= (sh->root.u.def.value
5595 + sh->root.u.def.section->output_section->vma
5596 + sh->root.u.def.section->output_offset);
5597 }
5598
5599 else if (strncmp (name, ".sdata2", 7) == 0
5600 || strncmp (name, ".sbss2", 6) == 0)
5601 {
5602 reg = 2;
5603 sh = htab->sdata2->sym_hash;
5604 addend -= (sh->root.u.def.value
5605 + sh->root.u.def.section->output_section->vma
5606 + sh->root.u.def.section->output_offset);
5607 }
5608
5609 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
5610 || strcmp (name, ".PPC.EMB.sbss0") == 0)
5611 {
5612 reg = 0;
5613 }
5614
5615 else
5616 {
5617 (*_bfd_error_handler)
5618 (_("%B: the target (%s) of a %s relocation is "
5619 "in the wrong output section (%s)"),
5620 input_bfd,
5621 sym_name,
5622 howto->name,
5623 name);
5624
5625 bfd_set_error (bfd_error_bad_value);
5626 ret = FALSE;
5627 continue;
5628 }
5629
5630 if (r_type == R_PPC_EMB_SDA21)
5631 { /* fill in register field */
5632 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5633 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
5634 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5635 }
5636 }
5637 break;
5638
5639 /* Relocate against the beginning of the section. */
5640 case R_PPC_SECTOFF:
5641 case R_PPC_SECTOFF_LO:
5642 case R_PPC_SECTOFF_HI:
5643 case R_PPC_SECTOFF_HA:
5644 BFD_ASSERT (sec != NULL);
5645 addend -= sec->output_section->vma;
5646 break;
5647
5648 /* Negative relocations. */
5649 case R_PPC_EMB_NADDR32:
5650 case R_PPC_EMB_NADDR16:
5651 case R_PPC_EMB_NADDR16_LO:
5652 case R_PPC_EMB_NADDR16_HI:
5653 case R_PPC_EMB_NADDR16_HA:
5654 addend -= 2 * relocation;
5655 break;
5656
5657 case R_PPC_COPY:
5658 case R_PPC_GLOB_DAT:
5659 case R_PPC_JMP_SLOT:
5660 case R_PPC_RELATIVE:
5661 case R_PPC_PLT32:
5662 case R_PPC_PLTREL32:
5663 case R_PPC_PLT16_LO:
5664 case R_PPC_PLT16_HI:
5665 case R_PPC_PLT16_HA:
5666 case R_PPC_ADDR30:
5667 case R_PPC_EMB_RELSEC16:
5668 case R_PPC_EMB_RELST_LO:
5669 case R_PPC_EMB_RELST_HI:
5670 case R_PPC_EMB_RELST_HA:
5671 case R_PPC_EMB_BIT_FLD:
5672 (*_bfd_error_handler)
5673 (_("%B: relocation %s is not yet supported for symbol %s."),
5674 input_bfd,
5675 howto->name,
5676 sym_name);
5677
5678 bfd_set_error (bfd_error_invalid_operation);
5679 ret = FALSE;
5680 continue;
5681 }
5682
5683 /* Do any further special processing. */
5684 switch (r_type)
5685 {
5686 default:
5687 break;
5688
5689 case R_PPC_ADDR16_HA:
5690 case R_PPC_GOT16_HA:
5691 case R_PPC_PLT16_HA:
5692 case R_PPC_SECTOFF_HA:
5693 case R_PPC_TPREL16_HA:
5694 case R_PPC_DTPREL16_HA:
5695 case R_PPC_GOT_TLSGD16_HA:
5696 case R_PPC_GOT_TLSLD16_HA:
5697 case R_PPC_GOT_TPREL16_HA:
5698 case R_PPC_GOT_DTPREL16_HA:
5699 case R_PPC_EMB_NADDR16_HA:
5700 case R_PPC_EMB_RELST_HA:
5701 /* It's just possible that this symbol is a weak symbol
5702 that's not actually defined anywhere. In that case,
5703 'sec' would be NULL, and we should leave the symbol
5704 alone (it will be set to zero elsewhere in the link). */
5705 if (sec != NULL)
5706 /* Add 0x10000 if sign bit in 0:15 is set.
5707 Bits 0:15 are not used. */
5708 addend += 0x8000;
5709 break;
5710 }
5711
5712 #ifdef DEBUG
5713 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
5714 "offset = %ld, addend = %ld\n",
5715 howto->name,
5716 (int) r_type,
5717 sym_name,
5718 r_symndx,
5719 (long) rel->r_offset,
5720 (long) addend);
5721 #endif
5722
5723 if (unresolved_reloc
5724 && !((input_section->flags & SEC_DEBUGGING) != 0
5725 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
5726 {
5727 (*_bfd_error_handler)
5728 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5729 input_bfd,
5730 input_section,
5731 (long) rel->r_offset,
5732 howto->name,
5733 sym_name);
5734 ret = FALSE;
5735 }
5736
5737 r = _bfd_final_link_relocate (howto,
5738 input_bfd,
5739 input_section,
5740 contents,
5741 rel->r_offset,
5742 relocation,
5743 addend);
5744
5745 if (r != bfd_reloc_ok)
5746 {
5747 if (sym_name == NULL)
5748 sym_name = "(null)";
5749 if (r == bfd_reloc_overflow)
5750 {
5751 if (warned)
5752 continue;
5753 if (h != NULL
5754 && h->root.type == bfd_link_hash_undefweak
5755 && howto->pc_relative)
5756 {
5757 /* Assume this is a call protected by other code that
5758 detect the symbol is undefined. If this is the case,
5759 we can safely ignore the overflow. If not, the
5760 program is hosed anyway, and a little warning isn't
5761 going to help. */
5762
5763 continue;
5764 }
5765
5766 if (! (*info->callbacks->reloc_overflow) (info,
5767 sym_name,
5768 howto->name,
5769 rel->r_addend,
5770 input_bfd,
5771 input_section,
5772 rel->r_offset))
5773 return FALSE;
5774 }
5775 else
5776 {
5777 (*_bfd_error_handler)
5778 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
5779 input_bfd, input_section,
5780 (long) rel->r_offset, howto->name, sym_name, (int) r);
5781 ret = FALSE;
5782 }
5783 }
5784 }
5785
5786 #ifdef DEBUG
5787 fprintf (stderr, "\n");
5788 #endif
5789
5790 return ret;
5791 }
5792
5793 static enum elf_reloc_type_class
5794 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
5795 {
5796 switch (ELF32_R_TYPE (rela->r_info))
5797 {
5798 case R_PPC_RELATIVE:
5799 return reloc_class_relative;
5800 case R_PPC_REL24:
5801 case R_PPC_ADDR24:
5802 case R_PPC_JMP_SLOT:
5803 return reloc_class_plt;
5804 case R_PPC_COPY:
5805 return reloc_class_copy;
5806 default:
5807 return reloc_class_normal;
5808 }
5809 }
5810 \f
5811 /* Support for core dump NOTE sections. */
5812
5813 static bfd_boolean
5814 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
5815 {
5816 int offset;
5817 unsigned int size;
5818
5819 switch (note->descsz)
5820 {
5821 default:
5822 return FALSE;
5823
5824 case 268: /* Linux/PPC. */
5825 /* pr_cursig */
5826 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
5827
5828 /* pr_pid */
5829 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
5830
5831 /* pr_reg */
5832 offset = 72;
5833 size = 192;
5834
5835 break;
5836 }
5837
5838 /* Make a ".reg/999" section. */
5839 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
5840 size, note->descpos + offset);
5841 }
5842
5843 static bfd_boolean
5844 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
5845 {
5846 switch (note->descsz)
5847 {
5848 default:
5849 return FALSE;
5850
5851 case 128: /* Linux/PPC elf_prpsinfo. */
5852 elf_tdata (abfd)->core_program
5853 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
5854 elf_tdata (abfd)->core_command
5855 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
5856 }
5857
5858 /* Note that for some reason, a spurious space is tacked
5859 onto the end of the args in some (at least one anyway)
5860 implementations, so strip it off if it exists. */
5861
5862 {
5863 char *command = elf_tdata (abfd)->core_command;
5864 int n = strlen (command);
5865
5866 if (0 < n && command[n - 1] == ' ')
5867 command[n - 1] = '\0';
5868 }
5869
5870 return TRUE;
5871 }
5872 \f
5873 /* Very simple linked list structure for recording apuinfo values. */
5874 typedef struct apuinfo_list
5875 {
5876 struct apuinfo_list *next;
5877 unsigned long value;
5878 }
5879 apuinfo_list;
5880
5881 static apuinfo_list *head;
5882
5883
5884 static void
5885 apuinfo_list_init (void)
5886 {
5887 head = NULL;
5888 }
5889
5890 static void
5891 apuinfo_list_add (unsigned long value)
5892 {
5893 apuinfo_list *entry = head;
5894
5895 while (entry != NULL)
5896 {
5897 if (entry->value == value)
5898 return;
5899 entry = entry->next;
5900 }
5901
5902 entry = bfd_malloc (sizeof (* entry));
5903 if (entry == NULL)
5904 return;
5905
5906 entry->value = value;
5907 entry->next = head;
5908 head = entry;
5909 }
5910
5911 static unsigned
5912 apuinfo_list_length (void)
5913 {
5914 apuinfo_list *entry;
5915 unsigned long count;
5916
5917 for (entry = head, count = 0;
5918 entry;
5919 entry = entry->next)
5920 ++ count;
5921
5922 return count;
5923 }
5924
5925 static inline unsigned long
5926 apuinfo_list_element (unsigned long number)
5927 {
5928 apuinfo_list * entry;
5929
5930 for (entry = head;
5931 entry && number --;
5932 entry = entry->next)
5933 ;
5934
5935 return entry ? entry->value : 0;
5936 }
5937
5938 static void
5939 apuinfo_list_finish (void)
5940 {
5941 apuinfo_list *entry;
5942
5943 for (entry = head; entry;)
5944 {
5945 apuinfo_list *next = entry->next;
5946 free (entry);
5947 entry = next;
5948 }
5949
5950 head = NULL;
5951 }
5952
5953 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
5954 #define APUINFO_LABEL "APUinfo"
5955
5956 /* Scan the input BFDs and create a linked list of
5957 the APUinfo values that will need to be emitted. */
5958
5959 static void
5960 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
5961 {
5962 bfd *ibfd;
5963 asection *asec;
5964 char *buffer;
5965 unsigned num_input_sections;
5966 bfd_size_type output_section_size;
5967 unsigned i;
5968 unsigned num_entries;
5969 unsigned long offset;
5970 unsigned long length;
5971 const char *error_message = NULL;
5972
5973 if (link_info == NULL)
5974 return;
5975
5976 /* Scan the input bfds, looking for apuinfo sections. */
5977 num_input_sections = 0;
5978 output_section_size = 0;
5979
5980 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5981 {
5982 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
5983 if (asec)
5984 {
5985 ++ num_input_sections;
5986 output_section_size += asec->size;
5987 }
5988 }
5989
5990 /* We need at least one input sections
5991 in order to make merging worthwhile. */
5992 if (num_input_sections < 1)
5993 return;
5994
5995 /* Just make sure that the output section exists as well. */
5996 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
5997 if (asec == NULL)
5998 return;
5999
6000 /* Allocate a buffer for the contents of the input sections. */
6001 buffer = bfd_malloc (output_section_size);
6002 if (buffer == NULL)
6003 return;
6004
6005 offset = 0;
6006 apuinfo_list_init ();
6007
6008 /* Read in the input sections contents. */
6009 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
6010 {
6011 unsigned long datum;
6012 char *ptr;
6013
6014 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
6015 if (asec == NULL)
6016 continue;
6017
6018 length = asec->size;
6019 if (length < 24)
6020 {
6021 error_message = _("corrupt or empty %s section in %B");
6022 goto fail;
6023 }
6024
6025 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
6026 || (bfd_bread (buffer + offset, length, ibfd) != length))
6027 {
6028 error_message = _("unable to read in %s section from %B");
6029 goto fail;
6030 }
6031
6032 /* Process the contents of the section. */
6033 ptr = buffer + offset;
6034 error_message = _("corrupt %s section in %B");
6035
6036 /* Verify the contents of the header. Note - we have to
6037 extract the values this way in order to allow for a
6038 host whose endian-ness is different from the target. */
6039 datum = bfd_get_32 (ibfd, ptr);
6040 if (datum != sizeof APUINFO_LABEL)
6041 goto fail;
6042
6043 datum = bfd_get_32 (ibfd, ptr + 8);
6044 if (datum != 0x2)
6045 goto fail;
6046
6047 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
6048 goto fail;
6049
6050 /* Get the number of bytes used for apuinfo entries. */
6051 datum = bfd_get_32 (ibfd, ptr + 4);
6052 if (datum + 20 != length)
6053 goto fail;
6054
6055 /* Make sure that we do not run off the end of the section. */
6056 if (offset + length > output_section_size)
6057 goto fail;
6058
6059 /* Scan the apuinfo section, building a list of apuinfo numbers. */
6060 for (i = 0; i < datum; i += 4)
6061 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
6062
6063 /* Update the offset. */
6064 offset += length;
6065 }
6066
6067 error_message = NULL;
6068
6069 /* Compute the size of the output section. */
6070 num_entries = apuinfo_list_length ();
6071 output_section_size = 20 + num_entries * 4;
6072
6073 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6074
6075 if (! bfd_set_section_size (abfd, asec, output_section_size))
6076 ibfd = abfd,
6077 error_message = _("warning: unable to set size of %s section in %B");
6078
6079 fail:
6080 free (buffer);
6081
6082 if (error_message)
6083 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
6084 }
6085
6086
6087 /* Prevent the output section from accumulating the input sections'
6088 contents. We have already stored this in our linked list structure. */
6089
6090 static bfd_boolean
6091 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
6092 asection *asec,
6093 bfd_byte *contents ATTRIBUTE_UNUSED)
6094 {
6095 return (apuinfo_list_length ()
6096 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
6097 }
6098
6099
6100 /* Finally we can generate the output section. */
6101
6102 static void
6103 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
6104 {
6105 bfd_byte *buffer;
6106 asection *asec;
6107 unsigned i;
6108 unsigned num_entries;
6109 bfd_size_type length;
6110
6111 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6112 if (asec == NULL)
6113 return;
6114
6115 if (apuinfo_list_length () == 0)
6116 return;
6117
6118 length = asec->size;
6119 if (length < 20)
6120 return;
6121
6122 buffer = bfd_malloc (length);
6123 if (buffer == NULL)
6124 {
6125 (*_bfd_error_handler)
6126 (_("failed to allocate space for new APUinfo section."));
6127 return;
6128 }
6129
6130 /* Create the apuinfo header. */
6131 num_entries = apuinfo_list_length ();
6132 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
6133 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
6134 bfd_put_32 (abfd, 0x2, buffer + 8);
6135 strcpy (buffer + 12, APUINFO_LABEL);
6136
6137 length = 20;
6138 for (i = 0; i < num_entries; i++)
6139 {
6140 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
6141 length += 4;
6142 }
6143
6144 if (length != asec->size)
6145 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
6146
6147 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
6148 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
6149
6150 free (buffer);
6151
6152 apuinfo_list_finish ();
6153 }
6154
6155 /* Return address for Ith PLT stub in section PLT, for relocation REL
6156 or (bfd_vma) -1 if it should not be included. */
6157
6158 static bfd_vma
6159 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
6160 const asection *plt ATTRIBUTE_UNUSED,
6161 const arelent *rel)
6162 {
6163 return rel->address;
6164 }
6165
6166 /* Add extra PPC sections -- Note, for now, make .sbss2 and
6167 .PPC.EMB.sbss0 a normal section, and not a bss section so
6168 that the linker doesn't crater when trying to make more than
6169 2 sections. */
6170
6171 static struct bfd_elf_special_section const ppc_elf_special_sections[]=
6172 {
6173 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
6174 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
6175 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
6176 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
6177 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
6178 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
6179 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
6180 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
6181 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
6182 { NULL, 0, 0, 0, 0 }
6183 };
6184 \f
6185 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
6186 #define TARGET_LITTLE_NAME "elf32-powerpcle"
6187 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
6188 #define TARGET_BIG_NAME "elf32-powerpc"
6189 #define ELF_ARCH bfd_arch_powerpc
6190 #define ELF_MACHINE_CODE EM_PPC
6191 #ifdef __QNXTARGET__
6192 #define ELF_MAXPAGESIZE 0x1000
6193 #else
6194 #define ELF_MAXPAGESIZE 0x10000
6195 #endif
6196 #define elf_info_to_howto ppc_elf_info_to_howto
6197
6198 #ifdef EM_CYGNUS_POWERPC
6199 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6200 #endif
6201
6202 #ifdef EM_PPC_OLD
6203 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6204 #endif
6205
6206 #define elf_backend_plt_not_loaded 1
6207 #define elf_backend_got_symbol_offset 4
6208 #define elf_backend_can_gc_sections 1
6209 #define elf_backend_can_refcount 1
6210 #define elf_backend_got_header_size 12
6211 #define elf_backend_rela_normal 1
6212
6213 #define bfd_elf32_mkobject ppc_elf_mkobject
6214 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
6215 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
6216 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
6217 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
6218 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
6219
6220 #define elf_backend_object_p ppc_elf_object_p
6221 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
6222 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
6223 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
6224 #define elf_backend_relocate_section ppc_elf_relocate_section
6225 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
6226 #define elf_backend_check_relocs ppc_elf_check_relocs
6227 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
6228 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
6229 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
6230 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
6231 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
6232 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
6233 #define elf_backend_fake_sections ppc_elf_fake_sections
6234 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
6235 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
6236 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
6237 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
6238 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
6239 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
6240 #define elf_backend_final_write_processing ppc_elf_final_write_processing
6241 #define elf_backend_write_section ppc_elf_write_section
6242 #define elf_backend_special_sections ppc_elf_special_sections
6243 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
6244
6245 #include "elf32-target.h"
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