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* bfd/elf32-arm.c (elf32_arm_final_link_relocate): Resolve
[binutils.git] / bfd / elf32-ppc.c
blob0605da64f943a87e0a59f77b2e539a5a80bb3d3a
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->dynamic_adjusted)
333 {
334 /* If called to transfer flags for a weakdef during processing
335 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
336 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
337 dir->ref_dynamic |= ind->ref_dynamic;
338 dir->ref_regular |= ind->ref_regular;
339 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
340 dir->needs_plt |= ind->needs_plt;
341 }
342 else
343 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
344 }
345 \f
346 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
347
348 static reloc_howto_type ppc_elf_howto_raw[] = {
349 /* This reloc does nothing. */
350 HOWTO (R_PPC_NONE, /* type */
351 0, /* rightshift */
352 2, /* size (0 = byte, 1 = short, 2 = long) */
353 32, /* bitsize */
354 FALSE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_bitfield, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC_NONE", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0, /* dst_mask */
362 FALSE), /* pcrel_offset */
363
364 /* A standard 32 bit relocation. */
365 HOWTO (R_PPC_ADDR32, /* type */
366 0, /* rightshift */
367 2, /* size (0 = byte, 1 = short, 2 = long) */
368 32, /* bitsize */
369 FALSE, /* pc_relative */
370 0, /* bitpos */
371 complain_overflow_bitfield, /* complain_on_overflow */
372 bfd_elf_generic_reloc, /* special_function */
373 "R_PPC_ADDR32", /* name */
374 FALSE, /* partial_inplace */
375 0, /* src_mask */
376 0xffffffff, /* dst_mask */
377 FALSE), /* pcrel_offset */
378
379 /* An absolute 26 bit branch; the lower two bits must be zero.
380 FIXME: we don't check that, we just clear them. */
381 HOWTO (R_PPC_ADDR24, /* type */
382 0, /* rightshift */
383 2, /* size (0 = byte, 1 = short, 2 = long) */
384 26, /* bitsize */
385 FALSE, /* pc_relative */
386 0, /* bitpos */
387 complain_overflow_bitfield, /* complain_on_overflow */
388 bfd_elf_generic_reloc, /* special_function */
389 "R_PPC_ADDR24", /* name */
390 FALSE, /* partial_inplace */
391 0, /* src_mask */
392 0x3fffffc, /* dst_mask */
393 FALSE), /* pcrel_offset */
394
395 /* A standard 16 bit relocation. */
396 HOWTO (R_PPC_ADDR16, /* type */
397 0, /* rightshift */
398 1, /* size (0 = byte, 1 = short, 2 = long) */
399 16, /* bitsize */
400 FALSE, /* pc_relative */
401 0, /* bitpos */
402 complain_overflow_bitfield, /* complain_on_overflow */
403 bfd_elf_generic_reloc, /* special_function */
404 "R_PPC_ADDR16", /* name */
405 FALSE, /* partial_inplace */
406 0, /* src_mask */
407 0xffff, /* dst_mask */
408 FALSE), /* pcrel_offset */
409
410 /* A 16 bit relocation without overflow. */
411 HOWTO (R_PPC_ADDR16_LO, /* type */
412 0, /* rightshift */
413 1, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 FALSE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_dont,/* complain_on_overflow */
418 bfd_elf_generic_reloc, /* special_function */
419 "R_PPC_ADDR16_LO", /* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0xffff, /* dst_mask */
423 FALSE), /* pcrel_offset */
424
425 /* The high order 16 bits of an address. */
426 HOWTO (R_PPC_ADDR16_HI, /* type */
427 16, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 bfd_elf_generic_reloc, /* special_function */
434 "R_PPC_ADDR16_HI", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* The high order 16 bits of an address, plus 1 if the contents of
441 the low 16 bits, treated as a signed number, is negative. */
442 HOWTO (R_PPC_ADDR16_HA, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 ppc_elf_addr16_ha_reloc, /* special_function */
450 "R_PPC_ADDR16_HA", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* An absolute 16 bit branch; the lower two bits must be zero.
457 FIXME: we don't check that, we just clear them. */
458 HOWTO (R_PPC_ADDR14, /* type */
459 0, /* rightshift */
460 2, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_bitfield, /* complain_on_overflow */
465 bfd_elf_generic_reloc, /* special_function */
466 "R_PPC_ADDR14", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xfffc, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* An absolute 16 bit branch, for which bit 10 should be set to
473 indicate that the branch is expected to be taken. The lower two
474 bits must be zero. */
475 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
476 0, /* rightshift */
477 2, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 FALSE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_bitfield, /* complain_on_overflow */
482 bfd_elf_generic_reloc, /* special_function */
483 "R_PPC_ADDR14_BRTAKEN",/* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0xfffc, /* dst_mask */
487 FALSE), /* pcrel_offset */
488
489 /* An absolute 16 bit branch, for which bit 10 should be set to
490 indicate that the branch is not expected to be taken. The lower
491 two bits must be zero. */
492 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
493 0, /* rightshift */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
495 16, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_bitfield, /* complain_on_overflow */
499 bfd_elf_generic_reloc, /* special_function */
500 "R_PPC_ADDR14_BRNTAKEN",/* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0xfffc, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* A relative 26 bit branch; the lower two bits must be zero. */
507 HOWTO (R_PPC_REL24, /* type */
508 0, /* rightshift */
509 2, /* size (0 = byte, 1 = short, 2 = long) */
510 26, /* bitsize */
511 TRUE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_signed, /* complain_on_overflow */
514 bfd_elf_generic_reloc, /* special_function */
515 "R_PPC_REL24", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0x3fffffc, /* dst_mask */
519 TRUE), /* pcrel_offset */
520
521 /* A relative 16 bit branch; the lower two bits must be zero. */
522 HOWTO (R_PPC_REL14, /* type */
523 0, /* rightshift */
524 2, /* size (0 = byte, 1 = short, 2 = long) */
525 16, /* bitsize */
526 TRUE, /* pc_relative */
527 0, /* bitpos */
528 complain_overflow_signed, /* complain_on_overflow */
529 bfd_elf_generic_reloc, /* special_function */
530 "R_PPC_REL14", /* name */
531 FALSE, /* partial_inplace */
532 0, /* src_mask */
533 0xfffc, /* dst_mask */
534 TRUE), /* pcrel_offset */
535
536 /* A relative 16 bit branch. Bit 10 should be set to indicate that
537 the branch is expected to be taken. The lower two bits must be
538 zero. */
539 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
540 0, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 16, /* bitsize */
543 TRUE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_signed, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_PPC_REL14_BRTAKEN", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0xfffc, /* dst_mask */
551 TRUE), /* pcrel_offset */
552
553 /* A relative 16 bit branch. Bit 10 should be set to indicate that
554 the branch is not expected to be taken. The lower two bits must
555 be zero. */
556 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
557 0, /* rightshift */
558 2, /* size (0 = byte, 1 = short, 2 = long) */
559 16, /* bitsize */
560 TRUE, /* pc_relative */
561 0, /* bitpos */
562 complain_overflow_signed, /* complain_on_overflow */
563 bfd_elf_generic_reloc, /* special_function */
564 "R_PPC_REL14_BRNTAKEN",/* name */
565 FALSE, /* partial_inplace */
566 0, /* src_mask */
567 0xfffc, /* dst_mask */
568 TRUE), /* pcrel_offset */
569
570 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
571 symbol. */
572 HOWTO (R_PPC_GOT16, /* type */
573 0, /* rightshift */
574 1, /* size (0 = byte, 1 = short, 2 = long) */
575 16, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_signed, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC_GOT16", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
587 the symbol. */
588 HOWTO (R_PPC_GOT16_LO, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_dont, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_GOT16_LO", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
603 the symbol. */
604 HOWTO (R_PPC_GOT16_HI, /* type */
605 16, /* rightshift */
606 1, /* size (0 = byte, 1 = short, 2 = long) */
607 16, /* bitsize */
608 FALSE, /* pc_relative */
609 0, /* bitpos */
610 complain_overflow_bitfield, /* complain_on_overflow */
611 bfd_elf_generic_reloc, /* special_function */
612 "R_PPC_GOT16_HI", /* name */
613 FALSE, /* partial_inplace */
614 0, /* src_mask */
615 0xffff, /* dst_mask */
616 FALSE), /* pcrel_offset */
617
618 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
619 the symbol. */
620 HOWTO (R_PPC_GOT16_HA, /* type */
621 16, /* rightshift */
622 1, /* size (0 = byte, 1 = short, 2 = long) */
623 16, /* bitsize */
624 FALSE, /* pc_relative */
625 0, /* bitpos */
626 complain_overflow_bitfield, /* complain_on_overflow */
627 ppc_elf_addr16_ha_reloc, /* special_function */
628 "R_PPC_GOT16_HA", /* name */
629 FALSE, /* partial_inplace */
630 0, /* src_mask */
631 0xffff, /* dst_mask */
632 FALSE), /* pcrel_offset */
633
634 /* Like R_PPC_REL24, but referring to the procedure linkage table
635 entry for the symbol. */
636 HOWTO (R_PPC_PLTREL24, /* type */
637 0, /* rightshift */
638 2, /* size (0 = byte, 1 = short, 2 = long) */
639 26, /* bitsize */
640 TRUE, /* pc_relative */
641 0, /* bitpos */
642 complain_overflow_signed, /* complain_on_overflow */
643 bfd_elf_generic_reloc, /* special_function */
644 "R_PPC_PLTREL24", /* name */
645 FALSE, /* partial_inplace */
646 0, /* src_mask */
647 0x3fffffc, /* dst_mask */
648 TRUE), /* pcrel_offset */
649
650 /* This is used only by the dynamic linker. The symbol should exist
651 both in the object being run and in some shared library. The
652 dynamic linker copies the data addressed by the symbol from the
653 shared library into the object, because the object being
654 run has to have the data at some particular address. */
655 HOWTO (R_PPC_COPY, /* type */
656 0, /* rightshift */
657 2, /* size (0 = byte, 1 = short, 2 = long) */
658 32, /* bitsize */
659 FALSE, /* pc_relative */
660 0, /* bitpos */
661 complain_overflow_bitfield, /* complain_on_overflow */
662 bfd_elf_generic_reloc, /* special_function */
663 "R_PPC_COPY", /* name */
664 FALSE, /* partial_inplace */
665 0, /* src_mask */
666 0, /* dst_mask */
667 FALSE), /* pcrel_offset */
668
669 /* Like R_PPC_ADDR32, but used when setting global offset table
670 entries. */
671 HOWTO (R_PPC_GLOB_DAT, /* type */
672 0, /* rightshift */
673 2, /* size (0 = byte, 1 = short, 2 = long) */
674 32, /* bitsize */
675 FALSE, /* pc_relative */
676 0, /* bitpos */
677 complain_overflow_bitfield, /* complain_on_overflow */
678 bfd_elf_generic_reloc, /* special_function */
679 "R_PPC_GLOB_DAT", /* name */
680 FALSE, /* partial_inplace */
681 0, /* src_mask */
682 0xffffffff, /* dst_mask */
683 FALSE), /* pcrel_offset */
684
685 /* Marks a procedure linkage table entry for a symbol. */
686 HOWTO (R_PPC_JMP_SLOT, /* type */
687 0, /* rightshift */
688 2, /* size (0 = byte, 1 = short, 2 = long) */
689 32, /* bitsize */
690 FALSE, /* pc_relative */
691 0, /* bitpos */
692 complain_overflow_bitfield, /* complain_on_overflow */
693 bfd_elf_generic_reloc, /* special_function */
694 "R_PPC_JMP_SLOT", /* name */
695 FALSE, /* partial_inplace */
696 0, /* src_mask */
697 0, /* dst_mask */
698 FALSE), /* pcrel_offset */
699
700 /* Used only by the dynamic linker. When the object is run, this
701 longword is set to the load address of the object, plus the
702 addend. */
703 HOWTO (R_PPC_RELATIVE, /* type */
704 0, /* rightshift */
705 2, /* size (0 = byte, 1 = short, 2 = long) */
706 32, /* bitsize */
707 FALSE, /* pc_relative */
708 0, /* bitpos */
709 complain_overflow_bitfield, /* complain_on_overflow */
710 bfd_elf_generic_reloc, /* special_function */
711 "R_PPC_RELATIVE", /* name */
712 FALSE, /* partial_inplace */
713 0, /* src_mask */
714 0xffffffff, /* dst_mask */
715 FALSE), /* pcrel_offset */
716
717 /* Like R_PPC_REL24, but uses the value of the symbol within the
718 object rather than the final value. Normally used for
719 _GLOBAL_OFFSET_TABLE_. */
720 HOWTO (R_PPC_LOCAL24PC, /* type */
721 0, /* rightshift */
722 2, /* size (0 = byte, 1 = short, 2 = long) */
723 26, /* bitsize */
724 TRUE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_signed, /* complain_on_overflow */
727 bfd_elf_generic_reloc, /* special_function */
728 "R_PPC_LOCAL24PC", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0x3fffffc, /* dst_mask */
732 TRUE), /* pcrel_offset */
733
734 /* Like R_PPC_ADDR32, but may be unaligned. */
735 HOWTO (R_PPC_UADDR32, /* type */
736 0, /* rightshift */
737 2, /* size (0 = byte, 1 = short, 2 = long) */
738 32, /* bitsize */
739 FALSE, /* pc_relative */
740 0, /* bitpos */
741 complain_overflow_bitfield, /* complain_on_overflow */
742 bfd_elf_generic_reloc, /* special_function */
743 "R_PPC_UADDR32", /* name */
744 FALSE, /* partial_inplace */
745 0, /* src_mask */
746 0xffffffff, /* dst_mask */
747 FALSE), /* pcrel_offset */
748
749 /* Like R_PPC_ADDR16, but may be unaligned. */
750 HOWTO (R_PPC_UADDR16, /* type */
751 0, /* rightshift */
752 1, /* size (0 = byte, 1 = short, 2 = long) */
753 16, /* bitsize */
754 FALSE, /* pc_relative */
755 0, /* bitpos */
756 complain_overflow_bitfield, /* complain_on_overflow */
757 bfd_elf_generic_reloc, /* special_function */
758 "R_PPC_UADDR16", /* name */
759 FALSE, /* partial_inplace */
760 0, /* src_mask */
761 0xffff, /* dst_mask */
762 FALSE), /* pcrel_offset */
763
764 /* 32-bit PC relative */
765 HOWTO (R_PPC_REL32, /* type */
766 0, /* rightshift */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
768 32, /* bitsize */
769 TRUE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_bitfield, /* complain_on_overflow */
772 bfd_elf_generic_reloc, /* special_function */
773 "R_PPC_REL32", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0xffffffff, /* dst_mask */
777 TRUE), /* pcrel_offset */
778
779 /* 32-bit relocation to the symbol's procedure linkage table.
780 FIXME: not supported. */
781 HOWTO (R_PPC_PLT32, /* type */
782 0, /* rightshift */
783 2, /* size (0 = byte, 1 = short, 2 = long) */
784 32, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_bitfield, /* complain_on_overflow */
788 bfd_elf_generic_reloc, /* special_function */
789 "R_PPC_PLT32", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
796 FIXME: not supported. */
797 HOWTO (R_PPC_PLTREL32, /* type */
798 0, /* rightshift */
799 2, /* size (0 = byte, 1 = short, 2 = long) */
800 32, /* bitsize */
801 TRUE, /* pc_relative */
802 0, /* bitpos */
803 complain_overflow_bitfield, /* complain_on_overflow */
804 bfd_elf_generic_reloc, /* special_function */
805 "R_PPC_PLTREL32", /* name */
806 FALSE, /* partial_inplace */
807 0, /* src_mask */
808 0, /* dst_mask */
809 TRUE), /* pcrel_offset */
810
811 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
812 the symbol. */
813 HOWTO (R_PPC_PLT16_LO, /* type */
814 0, /* rightshift */
815 1, /* size (0 = byte, 1 = short, 2 = long) */
816 16, /* bitsize */
817 FALSE, /* pc_relative */
818 0, /* bitpos */
819 complain_overflow_dont, /* complain_on_overflow */
820 bfd_elf_generic_reloc, /* special_function */
821 "R_PPC_PLT16_LO", /* name */
822 FALSE, /* partial_inplace */
823 0, /* src_mask */
824 0xffff, /* dst_mask */
825 FALSE), /* pcrel_offset */
826
827 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
828 the symbol. */
829 HOWTO (R_PPC_PLT16_HI, /* type */
830 16, /* rightshift */
831 1, /* size (0 = byte, 1 = short, 2 = long) */
832 16, /* bitsize */
833 FALSE, /* pc_relative */
834 0, /* bitpos */
835 complain_overflow_bitfield, /* complain_on_overflow */
836 bfd_elf_generic_reloc, /* special_function */
837 "R_PPC_PLT16_HI", /* name */
838 FALSE, /* partial_inplace */
839 0, /* src_mask */
840 0xffff, /* dst_mask */
841 FALSE), /* pcrel_offset */
842
843 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
844 the symbol. */
845 HOWTO (R_PPC_PLT16_HA, /* type */
846 16, /* rightshift */
847 1, /* size (0 = byte, 1 = short, 2 = long) */
848 16, /* bitsize */
849 FALSE, /* pc_relative */
850 0, /* bitpos */
851 complain_overflow_bitfield, /* complain_on_overflow */
852 ppc_elf_addr16_ha_reloc, /* special_function */
853 "R_PPC_PLT16_HA", /* name */
854 FALSE, /* partial_inplace */
855 0, /* src_mask */
856 0xffff, /* dst_mask */
857 FALSE), /* pcrel_offset */
858
859 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
860 small data items. */
861 HOWTO (R_PPC_SDAREL16, /* type */
862 0, /* rightshift */
863 1, /* size (0 = byte, 1 = short, 2 = long) */
864 16, /* bitsize */
865 FALSE, /* pc_relative */
866 0, /* bitpos */
867 complain_overflow_signed, /* complain_on_overflow */
868 bfd_elf_generic_reloc, /* special_function */
869 "R_PPC_SDAREL16", /* name */
870 FALSE, /* partial_inplace */
871 0, /* src_mask */
872 0xffff, /* dst_mask */
873 FALSE), /* pcrel_offset */
874
875 /* 16-bit section relative relocation. */
876 HOWTO (R_PPC_SECTOFF, /* type */
877 0, /* rightshift */
878 1, /* size (0 = byte, 1 = short, 2 = long) */
879 16, /* bitsize */
880 FALSE, /* pc_relative */
881 0, /* bitpos */
882 complain_overflow_bitfield, /* complain_on_overflow */
883 bfd_elf_generic_reloc, /* special_function */
884 "R_PPC_SECTOFF", /* name */
885 FALSE, /* partial_inplace */
886 0, /* src_mask */
887 0xffff, /* dst_mask */
888 FALSE), /* pcrel_offset */
889
890 /* 16-bit lower half section relative relocation. */
891 HOWTO (R_PPC_SECTOFF_LO, /* type */
892 0, /* rightshift */
893 1, /* size (0 = byte, 1 = short, 2 = long) */
894 16, /* bitsize */
895 FALSE, /* pc_relative */
896 0, /* bitpos */
897 complain_overflow_dont, /* complain_on_overflow */
898 bfd_elf_generic_reloc, /* special_function */
899 "R_PPC_SECTOFF_LO", /* name */
900 FALSE, /* partial_inplace */
901 0, /* src_mask */
902 0xffff, /* dst_mask */
903 FALSE), /* pcrel_offset */
904
905 /* 16-bit upper half section relative relocation. */
906 HOWTO (R_PPC_SECTOFF_HI, /* type */
907 16, /* rightshift */
908 1, /* size (0 = byte, 1 = short, 2 = long) */
909 16, /* bitsize */
910 FALSE, /* pc_relative */
911 0, /* bitpos */
912 complain_overflow_bitfield, /* complain_on_overflow */
913 bfd_elf_generic_reloc, /* special_function */
914 "R_PPC_SECTOFF_HI", /* name */
915 FALSE, /* partial_inplace */
916 0, /* src_mask */
917 0xffff, /* dst_mask */
918 FALSE), /* pcrel_offset */
919
920 /* 16-bit upper half adjusted section relative relocation. */
921 HOWTO (R_PPC_SECTOFF_HA, /* type */
922 16, /* rightshift */
923 1, /* size (0 = byte, 1 = short, 2 = long) */
924 16, /* bitsize */
925 FALSE, /* pc_relative */
926 0, /* bitpos */
927 complain_overflow_bitfield, /* complain_on_overflow */
928 ppc_elf_addr16_ha_reloc, /* special_function */
929 "R_PPC_SECTOFF_HA", /* name */
930 FALSE, /* partial_inplace */
931 0, /* src_mask */
932 0xffff, /* dst_mask */
933 FALSE), /* pcrel_offset */
934
935 /* Marker reloc for TLS. */
936 HOWTO (R_PPC_TLS,
937 0, /* rightshift */
938 2, /* size (0 = byte, 1 = short, 2 = long) */
939 32, /* bitsize */
940 FALSE, /* pc_relative */
941 0, /* bitpos */
942 complain_overflow_dont, /* complain_on_overflow */
943 bfd_elf_generic_reloc, /* special_function */
944 "R_PPC_TLS", /* name */
945 FALSE, /* partial_inplace */
946 0, /* src_mask */
947 0, /* dst_mask */
948 FALSE), /* pcrel_offset */
949
950 /* Computes the load module index of the load module that contains the
951 definition of its TLS sym. */
952 HOWTO (R_PPC_DTPMOD32,
953 0, /* rightshift */
954 2, /* size (0 = byte, 1 = short, 2 = long) */
955 32, /* bitsize */
956 FALSE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc_elf_unhandled_reloc, /* special_function */
960 "R_PPC_DTPMOD32", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 0xffffffff, /* dst_mask */
964 FALSE), /* pcrel_offset */
965
966 /* Computes a dtv-relative displacement, the difference between the value
967 of sym+add and the base address of the thread-local storage block that
968 contains the definition of sym, minus 0x8000. */
969 HOWTO (R_PPC_DTPREL32,
970 0, /* rightshift */
971 2, /* size (0 = byte, 1 = short, 2 = long) */
972 32, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_dont, /* complain_on_overflow */
976 ppc_elf_unhandled_reloc, /* special_function */
977 "R_PPC_DTPREL32", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffffffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* A 16 bit dtprel reloc. */
984 HOWTO (R_PPC_DTPREL16,
985 0, /* rightshift */
986 1, /* size (0 = byte, 1 = short, 2 = long) */
987 16, /* bitsize */
988 FALSE, /* pc_relative */
989 0, /* bitpos */
990 complain_overflow_signed, /* complain_on_overflow */
991 ppc_elf_unhandled_reloc, /* special_function */
992 "R_PPC_DTPREL16", /* name */
993 FALSE, /* partial_inplace */
994 0, /* src_mask */
995 0xffff, /* dst_mask */
996 FALSE), /* pcrel_offset */
997
998 /* Like DTPREL16, but no overflow. */
999 HOWTO (R_PPC_DTPREL16_LO,
1000 0, /* rightshift */
1001 1, /* size (0 = byte, 1 = short, 2 = long) */
1002 16, /* bitsize */
1003 FALSE, /* pc_relative */
1004 0, /* bitpos */
1005 complain_overflow_dont, /* complain_on_overflow */
1006 ppc_elf_unhandled_reloc, /* special_function */
1007 "R_PPC_DTPREL16_LO", /* name */
1008 FALSE, /* partial_inplace */
1009 0, /* src_mask */
1010 0xffff, /* dst_mask */
1011 FALSE), /* pcrel_offset */
1012
1013 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1014 HOWTO (R_PPC_DTPREL16_HI,
1015 16, /* rightshift */
1016 1, /* size (0 = byte, 1 = short, 2 = long) */
1017 16, /* bitsize */
1018 FALSE, /* pc_relative */
1019 0, /* bitpos */
1020 complain_overflow_dont, /* complain_on_overflow */
1021 ppc_elf_unhandled_reloc, /* special_function */
1022 "R_PPC_DTPREL16_HI", /* name */
1023 FALSE, /* partial_inplace */
1024 0, /* src_mask */
1025 0xffff, /* dst_mask */
1026 FALSE), /* pcrel_offset */
1027
1028 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1029 HOWTO (R_PPC_DTPREL16_HA,
1030 16, /* rightshift */
1031 1, /* size (0 = byte, 1 = short, 2 = long) */
1032 16, /* bitsize */
1033 FALSE, /* pc_relative */
1034 0, /* bitpos */
1035 complain_overflow_dont, /* complain_on_overflow */
1036 ppc_elf_unhandled_reloc, /* special_function */
1037 "R_PPC_DTPREL16_HA", /* name */
1038 FALSE, /* partial_inplace */
1039 0, /* src_mask */
1040 0xffff, /* dst_mask */
1041 FALSE), /* pcrel_offset */
1042
1043 /* Computes a tp-relative displacement, the difference between the value of
1044 sym+add and the value of the thread pointer (r13). */
1045 HOWTO (R_PPC_TPREL32,
1046 0, /* rightshift */
1047 2, /* size (0 = byte, 1 = short, 2 = long) */
1048 32, /* bitsize */
1049 FALSE, /* pc_relative */
1050 0, /* bitpos */
1051 complain_overflow_dont, /* complain_on_overflow */
1052 ppc_elf_unhandled_reloc, /* special_function */
1053 "R_PPC_TPREL32", /* name */
1054 FALSE, /* partial_inplace */
1055 0, /* src_mask */
1056 0xffffffff, /* dst_mask */
1057 FALSE), /* pcrel_offset */
1058
1059 /* A 16 bit tprel reloc. */
1060 HOWTO (R_PPC_TPREL16,
1061 0, /* rightshift */
1062 1, /* size (0 = byte, 1 = short, 2 = long) */
1063 16, /* bitsize */
1064 FALSE, /* pc_relative */
1065 0, /* bitpos */
1066 complain_overflow_signed, /* complain_on_overflow */
1067 ppc_elf_unhandled_reloc, /* special_function */
1068 "R_PPC_TPREL16", /* name */
1069 FALSE, /* partial_inplace */
1070 0, /* src_mask */
1071 0xffff, /* dst_mask */
1072 FALSE), /* pcrel_offset */
1073
1074 /* Like TPREL16, but no overflow. */
1075 HOWTO (R_PPC_TPREL16_LO,
1076 0, /* rightshift */
1077 1, /* size (0 = byte, 1 = short, 2 = long) */
1078 16, /* bitsize */
1079 FALSE, /* pc_relative */
1080 0, /* bitpos */
1081 complain_overflow_dont, /* complain_on_overflow */
1082 ppc_elf_unhandled_reloc, /* special_function */
1083 "R_PPC_TPREL16_LO", /* name */
1084 FALSE, /* partial_inplace */
1085 0, /* src_mask */
1086 0xffff, /* dst_mask */
1087 FALSE), /* pcrel_offset */
1088
1089 /* Like TPREL16_LO, but next higher group of 16 bits. */
1090 HOWTO (R_PPC_TPREL16_HI,
1091 16, /* rightshift */
1092 1, /* size (0 = byte, 1 = short, 2 = long) */
1093 16, /* bitsize */
1094 FALSE, /* pc_relative */
1095 0, /* bitpos */
1096 complain_overflow_dont, /* complain_on_overflow */
1097 ppc_elf_unhandled_reloc, /* special_function */
1098 "R_PPC_TPREL16_HI", /* name */
1099 FALSE, /* partial_inplace */
1100 0, /* src_mask */
1101 0xffff, /* dst_mask */
1102 FALSE), /* pcrel_offset */
1103
1104 /* Like TPREL16_HI, but adjust for low 16 bits. */
1105 HOWTO (R_PPC_TPREL16_HA,
1106 16, /* rightshift */
1107 1, /* size (0 = byte, 1 = short, 2 = long) */
1108 16, /* bitsize */
1109 FALSE, /* pc_relative */
1110 0, /* bitpos */
1111 complain_overflow_dont, /* complain_on_overflow */
1112 ppc_elf_unhandled_reloc, /* special_function */
1113 "R_PPC_TPREL16_HA", /* name */
1114 FALSE, /* partial_inplace */
1115 0, /* src_mask */
1116 0xffff, /* dst_mask */
1117 FALSE), /* pcrel_offset */
1118
1119 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1120 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1121 to the first entry. */
1122 HOWTO (R_PPC_GOT_TLSGD16,
1123 0, /* rightshift */
1124 1, /* size (0 = byte, 1 = short, 2 = long) */
1125 16, /* bitsize */
1126 FALSE, /* pc_relative */
1127 0, /* bitpos */
1128 complain_overflow_signed, /* complain_on_overflow */
1129 ppc_elf_unhandled_reloc, /* special_function */
1130 "R_PPC_GOT_TLSGD16", /* name */
1131 FALSE, /* partial_inplace */
1132 0, /* src_mask */
1133 0xffff, /* dst_mask */
1134 FALSE), /* pcrel_offset */
1135
1136 /* Like GOT_TLSGD16, but no overflow. */
1137 HOWTO (R_PPC_GOT_TLSGD16_LO,
1138 0, /* rightshift */
1139 1, /* size (0 = byte, 1 = short, 2 = long) */
1140 16, /* bitsize */
1141 FALSE, /* pc_relative */
1142 0, /* bitpos */
1143 complain_overflow_dont, /* complain_on_overflow */
1144 ppc_elf_unhandled_reloc, /* special_function */
1145 "R_PPC_GOT_TLSGD16_LO", /* name */
1146 FALSE, /* partial_inplace */
1147 0, /* src_mask */
1148 0xffff, /* dst_mask */
1149 FALSE), /* pcrel_offset */
1150
1151 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1152 HOWTO (R_PPC_GOT_TLSGD16_HI,
1153 16, /* rightshift */
1154 1, /* size (0 = byte, 1 = short, 2 = long) */
1155 16, /* bitsize */
1156 FALSE, /* pc_relative */
1157 0, /* bitpos */
1158 complain_overflow_dont, /* complain_on_overflow */
1159 ppc_elf_unhandled_reloc, /* special_function */
1160 "R_PPC_GOT_TLSGD16_HI", /* name */
1161 FALSE, /* partial_inplace */
1162 0, /* src_mask */
1163 0xffff, /* dst_mask */
1164 FALSE), /* pcrel_offset */
1165
1166 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1167 HOWTO (R_PPC_GOT_TLSGD16_HA,
1168 16, /* rightshift */
1169 1, /* size (0 = byte, 1 = short, 2 = long) */
1170 16, /* bitsize */
1171 FALSE, /* pc_relative */
1172 0, /* bitpos */
1173 complain_overflow_dont, /* complain_on_overflow */
1174 ppc_elf_unhandled_reloc, /* special_function */
1175 "R_PPC_GOT_TLSGD16_HA", /* name */
1176 FALSE, /* partial_inplace */
1177 0, /* src_mask */
1178 0xffff, /* dst_mask */
1179 FALSE), /* pcrel_offset */
1180
1181 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1182 with values (sym+add)@dtpmod and zero, and computes the offset to the
1183 first entry. */
1184 HOWTO (R_PPC_GOT_TLSLD16,
1185 0, /* rightshift */
1186 1, /* size (0 = byte, 1 = short, 2 = long) */
1187 16, /* bitsize */
1188 FALSE, /* pc_relative */
1189 0, /* bitpos */
1190 complain_overflow_signed, /* complain_on_overflow */
1191 ppc_elf_unhandled_reloc, /* special_function */
1192 "R_PPC_GOT_TLSLD16", /* name */
1193 FALSE, /* partial_inplace */
1194 0, /* src_mask */
1195 0xffff, /* dst_mask */
1196 FALSE), /* pcrel_offset */
1197
1198 /* Like GOT_TLSLD16, but no overflow. */
1199 HOWTO (R_PPC_GOT_TLSLD16_LO,
1200 0, /* rightshift */
1201 1, /* size (0 = byte, 1 = short, 2 = long) */
1202 16, /* bitsize */
1203 FALSE, /* pc_relative */
1204 0, /* bitpos */
1205 complain_overflow_dont, /* complain_on_overflow */
1206 ppc_elf_unhandled_reloc, /* special_function */
1207 "R_PPC_GOT_TLSLD16_LO", /* name */
1208 FALSE, /* partial_inplace */
1209 0, /* src_mask */
1210 0xffff, /* dst_mask */
1211 FALSE), /* pcrel_offset */
1212
1213 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1214 HOWTO (R_PPC_GOT_TLSLD16_HI,
1215 16, /* rightshift */
1216 1, /* size (0 = byte, 1 = short, 2 = long) */
1217 16, /* bitsize */
1218 FALSE, /* pc_relative */
1219 0, /* bitpos */
1220 complain_overflow_dont, /* complain_on_overflow */
1221 ppc_elf_unhandled_reloc, /* special_function */
1222 "R_PPC_GOT_TLSLD16_HI", /* name */
1223 FALSE, /* partial_inplace */
1224 0, /* src_mask */
1225 0xffff, /* dst_mask */
1226 FALSE), /* pcrel_offset */
1227
1228 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1229 HOWTO (R_PPC_GOT_TLSLD16_HA,
1230 16, /* rightshift */
1231 1, /* size (0 = byte, 1 = short, 2 = long) */
1232 16, /* bitsize */
1233 FALSE, /* pc_relative */
1234 0, /* bitpos */
1235 complain_overflow_dont, /* complain_on_overflow */
1236 ppc_elf_unhandled_reloc, /* special_function */
1237 "R_PPC_GOT_TLSLD16_HA", /* name */
1238 FALSE, /* partial_inplace */
1239 0, /* src_mask */
1240 0xffff, /* dst_mask */
1241 FALSE), /* pcrel_offset */
1242
1243 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1244 the offset to the entry. */
1245 HOWTO (R_PPC_GOT_DTPREL16,
1246 0, /* rightshift */
1247 1, /* size (0 = byte, 1 = short, 2 = long) */
1248 16, /* bitsize */
1249 FALSE, /* pc_relative */
1250 0, /* bitpos */
1251 complain_overflow_signed, /* complain_on_overflow */
1252 ppc_elf_unhandled_reloc, /* special_function */
1253 "R_PPC_GOT_DTPREL16", /* name */
1254 FALSE, /* partial_inplace */
1255 0, /* src_mask */
1256 0xffff, /* dst_mask */
1257 FALSE), /* pcrel_offset */
1258
1259 /* Like GOT_DTPREL16, but no overflow. */
1260 HOWTO (R_PPC_GOT_DTPREL16_LO,
1261 0, /* rightshift */
1262 1, /* size (0 = byte, 1 = short, 2 = long) */
1263 16, /* bitsize */
1264 FALSE, /* pc_relative */
1265 0, /* bitpos */
1266 complain_overflow_dont, /* complain_on_overflow */
1267 ppc_elf_unhandled_reloc, /* special_function */
1268 "R_PPC_GOT_DTPREL16_LO", /* name */
1269 FALSE, /* partial_inplace */
1270 0, /* src_mask */
1271 0xffff, /* dst_mask */
1272 FALSE), /* pcrel_offset */
1273
1274 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1275 HOWTO (R_PPC_GOT_DTPREL16_HI,
1276 16, /* rightshift */
1277 1, /* size (0 = byte, 1 = short, 2 = long) */
1278 16, /* bitsize */
1279 FALSE, /* pc_relative */
1280 0, /* bitpos */
1281 complain_overflow_dont, /* complain_on_overflow */
1282 ppc_elf_unhandled_reloc, /* special_function */
1283 "R_PPC_GOT_DTPREL16_HI", /* name */
1284 FALSE, /* partial_inplace */
1285 0, /* src_mask */
1286 0xffff, /* dst_mask */
1287 FALSE), /* pcrel_offset */
1288
1289 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1290 HOWTO (R_PPC_GOT_DTPREL16_HA,
1291 16, /* rightshift */
1292 1, /* size (0 = byte, 1 = short, 2 = long) */
1293 16, /* bitsize */
1294 FALSE, /* pc_relative */
1295 0, /* bitpos */
1296 complain_overflow_dont, /* complain_on_overflow */
1297 ppc_elf_unhandled_reloc, /* special_function */
1298 "R_PPC_GOT_DTPREL16_HA", /* name */
1299 FALSE, /* partial_inplace */
1300 0, /* src_mask */
1301 0xffff, /* dst_mask */
1302 FALSE), /* pcrel_offset */
1303
1304 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1305 offset to the entry. */
1306 HOWTO (R_PPC_GOT_TPREL16,
1307 0, /* rightshift */
1308 1, /* size (0 = byte, 1 = short, 2 = long) */
1309 16, /* bitsize */
1310 FALSE, /* pc_relative */
1311 0, /* bitpos */
1312 complain_overflow_signed, /* complain_on_overflow */
1313 ppc_elf_unhandled_reloc, /* special_function */
1314 "R_PPC_GOT_TPREL16", /* name */
1315 FALSE, /* partial_inplace */
1316 0, /* src_mask */
1317 0xffff, /* dst_mask */
1318 FALSE), /* pcrel_offset */
1319
1320 /* Like GOT_TPREL16, but no overflow. */
1321 HOWTO (R_PPC_GOT_TPREL16_LO,
1322 0, /* rightshift */
1323 1, /* size (0 = byte, 1 = short, 2 = long) */
1324 16, /* bitsize */
1325 FALSE, /* pc_relative */
1326 0, /* bitpos */
1327 complain_overflow_dont, /* complain_on_overflow */
1328 ppc_elf_unhandled_reloc, /* special_function */
1329 "R_PPC_GOT_TPREL16_LO", /* name */
1330 FALSE, /* partial_inplace */
1331 0, /* src_mask */
1332 0xffff, /* dst_mask */
1333 FALSE), /* pcrel_offset */
1334
1335 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1336 HOWTO (R_PPC_GOT_TPREL16_HI,
1337 16, /* rightshift */
1338 1, /* size (0 = byte, 1 = short, 2 = long) */
1339 16, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont, /* complain_on_overflow */
1343 ppc_elf_unhandled_reloc, /* special_function */
1344 "R_PPC_GOT_TPREL16_HI", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0xffff, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1351 HOWTO (R_PPC_GOT_TPREL16_HA,
1352 16, /* rightshift */
1353 1, /* size (0 = byte, 1 = short, 2 = long) */
1354 16, /* bitsize */
1355 FALSE, /* pc_relative */
1356 0, /* bitpos */
1357 complain_overflow_dont, /* complain_on_overflow */
1358 ppc_elf_unhandled_reloc, /* special_function */
1359 "R_PPC_GOT_TPREL16_HA", /* name */
1360 FALSE, /* partial_inplace */
1361 0, /* src_mask */
1362 0xffff, /* dst_mask */
1363 FALSE), /* pcrel_offset */
1364
1365 /* The remaining relocs are from the Embedded ELF ABI, and are not
1366 in the SVR4 ELF ABI. */
1367
1368 /* 32 bit value resulting from the addend minus the symbol. */
1369 HOWTO (R_PPC_EMB_NADDR32, /* type */
1370 0, /* rightshift */
1371 2, /* size (0 = byte, 1 = short, 2 = long) */
1372 32, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_bitfield, /* complain_on_overflow */
1376 bfd_elf_generic_reloc, /* special_function */
1377 "R_PPC_EMB_NADDR32", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 0xffffffff, /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* 16 bit value resulting from the addend minus the symbol. */
1384 HOWTO (R_PPC_EMB_NADDR16, /* type */
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_bitfield, /* complain_on_overflow */
1391 bfd_elf_generic_reloc, /* special_function */
1392 "R_PPC_EMB_NADDR16", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* 16 bit value resulting from the addend minus the symbol. */
1399 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1400 0, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_dont,/* complain_on_overflow */
1406 bfd_elf_generic_reloc, /* special_function */
1407 "R_PPC_EMB_ADDR16_LO", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* The high order 16 bits of the addend minus the symbol. */
1414 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1415 16, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_dont, /* complain_on_overflow */
1421 bfd_elf_generic_reloc, /* special_function */
1422 "R_PPC_EMB_NADDR16_HI", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* The high order 16 bits of the result of the addend minus the address,
1429 plus 1 if the contents of the low 16 bits, treated as a signed number,
1430 is negative. */
1431 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1432 16, /* rightshift */
1433 1, /* size (0 = byte, 1 = short, 2 = long) */
1434 16, /* bitsize */
1435 FALSE, /* pc_relative */
1436 0, /* bitpos */
1437 complain_overflow_dont, /* complain_on_overflow */
1438 ppc_elf_addr16_ha_reloc, /* special_function */
1439 "R_PPC_EMB_NADDR16_HA", /* name */
1440 FALSE, /* partial_inplace */
1441 0, /* src_mask */
1442 0xffff, /* dst_mask */
1443 FALSE), /* pcrel_offset */
1444
1445 /* 16 bit value resulting from allocating a 4 byte word to hold an
1446 address in the .sdata section, and returning the offset from
1447 _SDA_BASE_ for that relocation. */
1448 HOWTO (R_PPC_EMB_SDAI16, /* type */
1449 0, /* rightshift */
1450 1, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_bitfield, /* complain_on_overflow */
1455 bfd_elf_generic_reloc, /* special_function */
1456 "R_PPC_EMB_SDAI16", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0xffff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* 16 bit value resulting from allocating a 4 byte word to hold an
1463 address in the .sdata2 section, and returning the offset from
1464 _SDA2_BASE_ for that relocation. */
1465 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1466 0, /* rightshift */
1467 1, /* size (0 = byte, 1 = short, 2 = long) */
1468 16, /* bitsize */
1469 FALSE, /* pc_relative */
1470 0, /* bitpos */
1471 complain_overflow_bitfield, /* complain_on_overflow */
1472 bfd_elf_generic_reloc, /* special_function */
1473 "R_PPC_EMB_SDA2I16", /* name */
1474 FALSE, /* partial_inplace */
1475 0, /* src_mask */
1476 0xffff, /* dst_mask */
1477 FALSE), /* pcrel_offset */
1478
1479 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1480 small data items. */
1481 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1482 0, /* rightshift */
1483 1, /* size (0 = byte, 1 = short, 2 = long) */
1484 16, /* bitsize */
1485 FALSE, /* pc_relative */
1486 0, /* bitpos */
1487 complain_overflow_signed, /* complain_on_overflow */
1488 bfd_elf_generic_reloc, /* special_function */
1489 "R_PPC_EMB_SDA2REL", /* name */
1490 FALSE, /* partial_inplace */
1491 0, /* src_mask */
1492 0xffff, /* dst_mask */
1493 FALSE), /* pcrel_offset */
1494
1495 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1496 signed offset from the appropriate base, and filling in the register
1497 field with the appropriate register (0, 2, or 13). */
1498 HOWTO (R_PPC_EMB_SDA21, /* type */
1499 0, /* rightshift */
1500 2, /* size (0 = byte, 1 = short, 2 = long) */
1501 16, /* bitsize */
1502 FALSE, /* pc_relative */
1503 0, /* bitpos */
1504 complain_overflow_signed, /* complain_on_overflow */
1505 bfd_elf_generic_reloc, /* special_function */
1506 "R_PPC_EMB_SDA21", /* name */
1507 FALSE, /* partial_inplace */
1508 0, /* src_mask */
1509 0xffff, /* dst_mask */
1510 FALSE), /* pcrel_offset */
1511
1512 /* Relocation not handled: R_PPC_EMB_MRKREF */
1513 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1514 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1515 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1516 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1517 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1518
1519 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1520 in the 16 bit signed offset from the appropriate base, and filling in the
1521 register field with the appropriate register (0, 2, or 13). */
1522 HOWTO (R_PPC_EMB_RELSDA, /* type */
1523 0, /* rightshift */
1524 1, /* size (0 = byte, 1 = short, 2 = long) */
1525 16, /* bitsize */
1526 TRUE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_signed, /* complain_on_overflow */
1529 bfd_elf_generic_reloc, /* special_function */
1530 "R_PPC_EMB_RELSDA", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 0xffff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* Phony relocs to handle branch stubs. */
1537 HOWTO (R_PPC_RELAX32, /* type */
1538 0, /* rightshift */
1539 0, /* size */
1540 0, /* bitsize */
1541 FALSE, /* pc_relative */
1542 0, /* bitpos */
1543 complain_overflow_dont, /* complain_on_overflow */
1544 bfd_elf_generic_reloc, /* special_function */
1545 "R_PPC_RELAX32", /* name */
1546 FALSE, /* partial_inplace */
1547 0, /* src_mask */
1548 0, /* dst_mask */
1549 FALSE), /* pcrel_offset */
1550
1551 HOWTO (R_PPC_RELAX32PC, /* type */
1552 0, /* rightshift */
1553 0, /* size */
1554 0, /* bitsize */
1555 FALSE, /* pc_relative */
1556 0, /* bitpos */
1557 complain_overflow_dont, /* complain_on_overflow */
1558 bfd_elf_generic_reloc, /* special_function */
1559 "R_PPC_RELAX32PC", /* name */
1560 FALSE, /* partial_inplace */
1561 0, /* src_mask */
1562 0, /* dst_mask */
1563 FALSE), /* pcrel_offset */
1564
1565 /* GNU extension to record C++ vtable hierarchy. */
1566 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1567 0, /* rightshift */
1568 0, /* size (0 = byte, 1 = short, 2 = long) */
1569 0, /* bitsize */
1570 FALSE, /* pc_relative */
1571 0, /* bitpos */
1572 complain_overflow_dont, /* complain_on_overflow */
1573 NULL, /* special_function */
1574 "R_PPC_GNU_VTINHERIT", /* name */
1575 FALSE, /* partial_inplace */
1576 0, /* src_mask */
1577 0, /* dst_mask */
1578 FALSE), /* pcrel_offset */
1579
1580 /* GNU extension to record C++ vtable member usage. */
1581 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1582 0, /* rightshift */
1583 0, /* size (0 = byte, 1 = short, 2 = long) */
1584 0, /* bitsize */
1585 FALSE, /* pc_relative */
1586 0, /* bitpos */
1587 complain_overflow_dont, /* complain_on_overflow */
1588 NULL, /* special_function */
1589 "R_PPC_GNU_VTENTRY", /* name */
1590 FALSE, /* partial_inplace */
1591 0, /* src_mask */
1592 0, /* dst_mask */
1593 FALSE), /* pcrel_offset */
1594
1595 /* Phony reloc to handle AIX style TOC entries. */
1596 HOWTO (R_PPC_TOC16, /* type */
1597 0, /* rightshift */
1598 1, /* size (0 = byte, 1 = short, 2 = long) */
1599 16, /* bitsize */
1600 FALSE, /* pc_relative */
1601 0, /* bitpos */
1602 complain_overflow_signed, /* complain_on_overflow */
1603 bfd_elf_generic_reloc, /* special_function */
1604 "R_PPC_TOC16", /* name */
1605 FALSE, /* partial_inplace */
1606 0, /* src_mask */
1607 0xffff, /* dst_mask */
1608 FALSE), /* pcrel_offset */
1609 };
1610 \f
1611 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1612
1613 static void
1614 ppc_elf_howto_init (void)
1615 {
1616 unsigned int i, type;
1617
1618 for (i = 0;
1619 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1620 i++)
1621 {
1622 type = ppc_elf_howto_raw[i].type;
1623 if (type >= (sizeof (ppc_elf_howto_table)
1624 / sizeof (ppc_elf_howto_table[0])))
1625 abort ();
1626 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1627 }
1628 }
1629 \f
1630 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
1631
1632 static const int shared_stub_entry[] =
1633 {
1634 0x7c0802a6, /* mflr 0 */
1635 0x429f0005, /* bcl 20, 31, .Lxxx */
1636 0x7d6802a6, /* mflr 11 */
1637 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
1638 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
1639 0x7c0803a6, /* mtlr 0 */
1640 0x7d6903a6, /* mtctr 11 */
1641 0x4e800420, /* bctr */
1642 };
1643
1644 static const int stub_entry[] =
1645 {
1646 0x3d600000, /* lis 11,xxx@ha */
1647 0x396b0000, /* addi 11,11,xxx@l */
1648 0x7d6903a6, /* mtctr 11 */
1649 0x4e800420, /* bctr */
1650 };
1651
1652
1653 static bfd_boolean
1654 ppc_elf_relax_section (bfd *abfd,
1655 asection *isec,
1656 struct bfd_link_info *link_info,
1657 bfd_boolean *again)
1658 {
1659 struct one_fixup
1660 {
1661 struct one_fixup *next;
1662 asection *tsec;
1663 bfd_vma toff;
1664 bfd_vma trampoff;
1665 };
1666
1667 Elf_Internal_Shdr *symtab_hdr;
1668 bfd_byte *contents = NULL;
1669 Elf_Internal_Sym *isymbuf = NULL;
1670 Elf_Internal_Rela *internal_relocs = NULL;
1671 Elf_Internal_Rela *irel, *irelend;
1672 struct one_fixup *fixups = NULL;
1673 bfd_boolean changed;
1674 struct ppc_elf_link_hash_table *ppc_info;
1675 bfd_size_type trampoff;
1676
1677 *again = FALSE;
1678
1679 /* Nothing to do if there are no relocations. */
1680 if ((isec->flags & SEC_RELOC) == 0 || isec->reloc_count == 0)
1681 return TRUE;
1682
1683 trampoff = (isec->size + 3) & (bfd_vma) -4;
1684 /* Space for a branch around any trampolines. */
1685 trampoff += 4;
1686
1687 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1688
1689 /* Get a copy of the native relocations. */
1690 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
1691 link_info->keep_memory);
1692 if (internal_relocs == NULL)
1693 goto error_return;
1694
1695 ppc_info = ppc_elf_hash_table (link_info);
1696 irelend = internal_relocs + isec->reloc_count;
1697
1698 for (irel = internal_relocs; irel < irelend; irel++)
1699 {
1700 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
1701 bfd_vma symaddr, reladdr, toff, roff;
1702 asection *tsec;
1703 struct one_fixup *f;
1704 size_t insn_offset = 0;
1705 bfd_vma max_branch_offset, val;
1706 bfd_byte *hit_addr;
1707 unsigned long t0;
1708 unsigned char sym_type;
1709
1710 switch (r_type)
1711 {
1712 case R_PPC_REL24:
1713 case R_PPC_LOCAL24PC:
1714 case R_PPC_PLTREL24:
1715 max_branch_offset = 1 << 25;
1716 break;
1717
1718 case R_PPC_REL14:
1719 case R_PPC_REL14_BRTAKEN:
1720 case R_PPC_REL14_BRNTAKEN:
1721 max_branch_offset = 1 << 15;
1722 break;
1723
1724 default:
1725 continue;
1726 }
1727
1728 /* Get the value of the symbol referred to by the reloc. */
1729 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1730 {
1731 /* A local symbol. */
1732 Elf_Internal_Sym *isym;
1733
1734 /* Read this BFD's local symbols. */
1735 if (isymbuf == NULL)
1736 {
1737 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1738 if (isymbuf == NULL)
1739 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1740 symtab_hdr->sh_info, 0,
1741 NULL, NULL, NULL);
1742 if (isymbuf == 0)
1743 goto error_return;
1744 }
1745 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1746 if (isym->st_shndx == SHN_UNDEF)
1747 continue; /* We can't do anything with undefined symbols. */
1748 else if (isym->st_shndx == SHN_ABS)
1749 tsec = bfd_abs_section_ptr;
1750 else if (isym->st_shndx == SHN_COMMON)
1751 tsec = bfd_com_section_ptr;
1752 else
1753 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1754
1755 toff = isym->st_value;
1756 sym_type = ELF_ST_TYPE (isym->st_info);
1757 }
1758 else
1759 {
1760 /* Global symbol handling. */
1761 unsigned long indx;
1762 struct elf_link_hash_entry *h;
1763
1764 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1765 h = elf_sym_hashes (abfd)[indx];
1766
1767 while (h->root.type == bfd_link_hash_indirect
1768 || h->root.type == bfd_link_hash_warning)
1769 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1770
1771 if (r_type == R_PPC_PLTREL24
1772 && ppc_info->plt != NULL
1773 && h->plt.offset != (bfd_vma) -1)
1774 {
1775 tsec = ppc_info->plt;
1776 toff = h->plt.offset;
1777 }
1778 else if (h->root.type == bfd_link_hash_defined
1779 || h->root.type == bfd_link_hash_defweak)
1780 {
1781 tsec = h->root.u.def.section;
1782 toff = h->root.u.def.value;
1783 }
1784 else
1785 continue;
1786
1787 sym_type = h->type;
1788 }
1789
1790 /* If the branch and target are in the same section, you have
1791 no hope of adding stubs. We'll error out later should the
1792 branch overflow. */
1793 if (tsec == isec)
1794 continue;
1795
1796 /* There probably isn't any reason to handle symbols in
1797 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
1798 attribute for a code section, and we are only looking at
1799 branches. However, implement it correctly here as a
1800 reference for other target relax_section functions. */
1801 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
1802 {
1803 /* At this stage in linking, no SEC_MERGE symbol has been
1804 adjusted, so all references to such symbols need to be
1805 passed through _bfd_merged_section_offset. (Later, in
1806 relocate_section, all SEC_MERGE symbols *except* for
1807 section symbols have been adjusted.)
1808
1809 gas may reduce relocations against symbols in SEC_MERGE
1810 sections to a relocation against the section symbol when
1811 the original addend was zero. When the reloc is against
1812 a section symbol we should include the addend in the
1813 offset passed to _bfd_merged_section_offset, since the
1814 location of interest is the original symbol. On the
1815 other hand, an access to "sym+addend" where "sym" is not
1816 a section symbol should not include the addend; Such an
1817 access is presumed to be an offset from "sym"; The
1818 location of interest is just "sym". */
1819 if (sym_type == STT_SECTION)
1820 toff += irel->r_addend;
1821
1822 toff = _bfd_merged_section_offset (abfd, &tsec,
1823 elf_section_data (tsec)->sec_info,
1824 toff);
1825
1826 if (sym_type != STT_SECTION)
1827 toff += irel->r_addend;
1828 }
1829 else
1830 toff += irel->r_addend;
1831
1832 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
1833
1834 roff = irel->r_offset;
1835 reladdr = isec->output_section->vma + isec->output_offset + roff;
1836
1837 /* If the branch is in range, no need to do anything. */
1838 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
1839 continue;
1840
1841 /* Look for an existing fixup to this address. */
1842 for (f = fixups; f ; f = f->next)
1843 if (f->tsec == tsec && f->toff == toff)
1844 break;
1845
1846 if (f == NULL)
1847 {
1848 size_t size;
1849 unsigned long stub_rtype;
1850
1851 val = trampoff - roff;
1852 if (val >= max_branch_offset)
1853 /* Oh dear, we can't reach a trampoline. Don't try to add
1854 one. We'll report an error later. */
1855 continue;
1856
1857 if (link_info->shared)
1858 {
1859 size = 4 * ARRAY_SIZE (shared_stub_entry);
1860 insn_offset = 12;
1861 stub_rtype = R_PPC_RELAX32PC;
1862 }
1863 else
1864 {
1865 size = 4 * ARRAY_SIZE (stub_entry);
1866 insn_offset = 0;
1867 stub_rtype = R_PPC_RELAX32;
1868 }
1869
1870 /* Hijack the old relocation. Since we need two
1871 relocations for this use a "composite" reloc. */
1872 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1873 stub_rtype);
1874 irel->r_offset = trampoff + insn_offset;
1875
1876 /* Record the fixup so we don't do it again this section. */
1877 f = bfd_malloc (sizeof (*f));
1878 f->next = fixups;
1879 f->tsec = tsec;
1880 f->toff = toff;
1881 f->trampoff = trampoff;
1882 fixups = f;
1883
1884 trampoff += size;
1885 }
1886 else
1887 {
1888 val = f->trampoff - roff;
1889 if (val >= max_branch_offset)
1890 continue;
1891
1892 /* Nop out the reloc, since we're finalizing things here. */
1893 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
1894 }
1895
1896 /* Get the section contents. */
1897 if (contents == NULL)
1898 {
1899 /* Get cached copy if it exists. */
1900 if (elf_section_data (isec)->this_hdr.contents != NULL)
1901 contents = elf_section_data (isec)->this_hdr.contents;
1902 else
1903 {
1904 /* Go get them off disk. */
1905 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
1906 goto error_return;
1907 }
1908 }
1909
1910 /* Fix up the existing branch to hit the trampoline. */
1911 hit_addr = contents + roff;
1912 switch (r_type)
1913 {
1914 case R_PPC_REL24:
1915 case R_PPC_LOCAL24PC:
1916 case R_PPC_PLTREL24:
1917 t0 = bfd_get_32 (abfd, hit_addr);
1918 t0 &= ~0x3fffffc;
1919 t0 |= val & 0x3fffffc;
1920 bfd_put_32 (abfd, t0, hit_addr);
1921 break;
1922
1923 case R_PPC_REL14:
1924 case R_PPC_REL14_BRTAKEN:
1925 case R_PPC_REL14_BRNTAKEN:
1926 t0 = bfd_get_32 (abfd, hit_addr);
1927 t0 &= ~0xfffc;
1928 t0 |= val & 0xfffc;
1929 bfd_put_32 (abfd, t0, hit_addr);
1930 break;
1931 }
1932 }
1933
1934 /* Write out the trampolines. */
1935 changed = fixups != NULL;
1936 if (fixups != NULL)
1937 {
1938 const int *stub;
1939 bfd_byte *dest;
1940 bfd_vma val;
1941 int i, size;
1942
1943 do
1944 {
1945 struct one_fixup *f = fixups;
1946 fixups = fixups->next;
1947 free (f);
1948 }
1949 while (fixups);
1950
1951 contents = bfd_realloc (contents, trampoff);
1952 if (contents == NULL)
1953 goto error_return;
1954
1955 isec->size = (isec->size + 3) & (bfd_vma) -4;
1956 /* Branch around the trampolines. */
1957 val = trampoff - isec->size + 0x48000000;
1958 dest = contents + isec->size;
1959 isec->size = trampoff;
1960 bfd_put_32 (abfd, val, dest);
1961 dest += 4;
1962
1963 if (link_info->shared)
1964 {
1965 stub = shared_stub_entry;
1966 size = ARRAY_SIZE (shared_stub_entry);
1967 }
1968 else
1969 {
1970 stub = stub_entry;
1971 size = ARRAY_SIZE (stub_entry);
1972 }
1973
1974 i = 0;
1975 while (dest < contents + trampoff)
1976 {
1977 bfd_put_32 (abfd, stub[i], dest);
1978 i++;
1979 if (i == size)
1980 i = 0;
1981 dest += 4;
1982 }
1983 BFD_ASSERT (i == 0);
1984 }
1985
1986 if (isymbuf != NULL
1987 && symtab_hdr->contents != (unsigned char *) isymbuf)
1988 {
1989 if (! link_info->keep_memory)
1990 free (isymbuf);
1991 else
1992 {
1993 /* Cache the symbols for elf_link_input_bfd. */
1994 symtab_hdr->contents = (unsigned char *) isymbuf;
1995 }
1996 }
1997
1998 if (contents != NULL
1999 && elf_section_data (isec)->this_hdr.contents != contents)
2000 {
2001 if (!changed && !link_info->keep_memory)
2002 free (contents);
2003 else
2004 {
2005 /* Cache the section contents for elf_link_input_bfd. */
2006 elf_section_data (isec)->this_hdr.contents = contents;
2007 }
2008 }
2009
2010 if (elf_section_data (isec)->relocs != internal_relocs)
2011 {
2012 if (!changed)
2013 free (internal_relocs);
2014 else
2015 elf_section_data (isec)->relocs = internal_relocs;
2016 }
2017
2018 *again = changed;
2019 return TRUE;
2020
2021 error_return:
2022 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
2023 free (isymbuf);
2024 if (contents != NULL
2025 && elf_section_data (isec)->this_hdr.contents != contents)
2026 free (contents);
2027 if (internal_relocs != NULL
2028 && elf_section_data (isec)->relocs != internal_relocs)
2029 free (internal_relocs);
2030 return FALSE;
2031 }
2032 \f
2033 static reloc_howto_type *
2034 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2035 bfd_reloc_code_real_type code)
2036 {
2037 enum elf_ppc_reloc_type r;
2038
2039 /* Initialize howto table if not already done. */
2040 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2041 ppc_elf_howto_init ();
2042
2043 switch (code)
2044 {
2045 default:
2046 return NULL;
2047
2048 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
2049 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
2050 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
2051 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
2052 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
2053 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
2054 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
2055 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
2056 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
2057 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
2058 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
2059 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
2060 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
2061 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
2062 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
2063 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
2064 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
2065 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
2066 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
2067 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
2068 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
2069 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
2070 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
2071 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
2072 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
2073 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
2074 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
2075 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
2076 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
2077 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
2078 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
2079 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
2080 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
2081 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
2082 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
2083 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
2084 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
2085 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
2086 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
2087 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
2088 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
2089 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
2090 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
2091 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
2092 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
2093 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
2094 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
2095 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
2096 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
2097 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
2098 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
2099 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
2100 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
2101 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
2102 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
2103 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
2104 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
2105 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
2106 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
2107 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
2108 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
2109 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
2110 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
2111 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
2112 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
2113 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
2114 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
2115 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
2116 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
2117 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
2118 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
2119 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
2120 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
2121 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
2122 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
2123 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
2124 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
2125 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
2126 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
2127 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2128 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2129 }
2130
2131 return ppc_elf_howto_table[r];
2132 };
2133
2134 /* Set the howto pointer for a PowerPC ELF reloc. */
2135
2136 static void
2137 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2138 arelent *cache_ptr,
2139 Elf_Internal_Rela *dst)
2140 {
2141 /* Initialize howto table if not already done. */
2142 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2143 ppc_elf_howto_init ();
2144
2145 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2146 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2147 }
2148
2149 /* Handle the R_PPC_ADDR16_HA reloc. */
2150
2151 static bfd_reloc_status_type
2152 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2153 arelent *reloc_entry,
2154 asymbol *symbol,
2155 void *data ATTRIBUTE_UNUSED,
2156 asection *input_section,
2157 bfd *output_bfd,
2158 char **error_message ATTRIBUTE_UNUSED)
2159 {
2160 bfd_vma relocation;
2161
2162 if (output_bfd != NULL)
2163 {
2164 reloc_entry->address += input_section->output_offset;
2165 return bfd_reloc_ok;
2166 }
2167
2168 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2169 return bfd_reloc_outofrange;
2170
2171 if (bfd_is_com_section (symbol->section))
2172 relocation = 0;
2173 else
2174 relocation = symbol->value;
2175
2176 relocation += symbol->section->output_section->vma;
2177 relocation += symbol->section->output_offset;
2178 relocation += reloc_entry->addend;
2179
2180 reloc_entry->addend += (relocation & 0x8000) << 1;
2181
2182 return bfd_reloc_continue;
2183 }
2184
2185 static bfd_reloc_status_type
2186 ppc_elf_unhandled_reloc (bfd *abfd,
2187 arelent *reloc_entry,
2188 asymbol *symbol,
2189 void *data,
2190 asection *input_section,
2191 bfd *output_bfd,
2192 char **error_message)
2193 {
2194 /* If this is a relocatable link (output_bfd test tells us), just
2195 call the generic function. Any adjustment will be done at final
2196 link time. */
2197 if (output_bfd != NULL)
2198 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2199 input_section, output_bfd, error_message);
2200
2201 if (error_message != NULL)
2202 {
2203 static char buf[60];
2204 sprintf (buf, _("generic linker can't handle %s"),
2205 reloc_entry->howto->name);
2206 *error_message = buf;
2207 }
2208 return bfd_reloc_dangerous;
2209 }
2210
2211 /* Fix bad default arch selected for a 32 bit input bfd when the
2212 default is 64 bit. */
2213
2214 static bfd_boolean
2215 ppc_elf_object_p (bfd *abfd)
2216 {
2217 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2218 {
2219 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2220
2221 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2222 {
2223 /* Relies on arch after 64 bit default being 32 bit default. */
2224 abfd->arch_info = abfd->arch_info->next;
2225 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2226 }
2227 }
2228 return TRUE;
2229 }
2230
2231 /* Function to set whether a module needs the -mrelocatable bit set. */
2232
2233 static bfd_boolean
2234 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2235 {
2236 BFD_ASSERT (!elf_flags_init (abfd)
2237 || elf_elfheader (abfd)->e_flags == flags);
2238
2239 elf_elfheader (abfd)->e_flags = flags;
2240 elf_flags_init (abfd) = TRUE;
2241 return TRUE;
2242 }
2243
2244 /* Merge backend specific data from an object file to the output
2245 object file when linking. */
2246
2247 static bfd_boolean
2248 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2249 {
2250 flagword old_flags;
2251 flagword new_flags;
2252 bfd_boolean error;
2253
2254 /* Check if we have the same endianess. */
2255 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
2256 return FALSE;
2257
2258 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2259 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2260 return TRUE;
2261
2262 new_flags = elf_elfheader (ibfd)->e_flags;
2263 old_flags = elf_elfheader (obfd)->e_flags;
2264 if (!elf_flags_init (obfd))
2265 {
2266 /* First call, no flags set. */
2267 elf_flags_init (obfd) = TRUE;
2268 elf_elfheader (obfd)->e_flags = new_flags;
2269 }
2270
2271 /* Compatible flags are ok. */
2272 else if (new_flags == old_flags)
2273 ;
2274
2275 /* Incompatible flags. */
2276 else
2277 {
2278 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
2279 to be linked with either. */
2280 error = FALSE;
2281 if ((new_flags & EF_PPC_RELOCATABLE) != 0
2282 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
2283 {
2284 error = TRUE;
2285 (*_bfd_error_handler)
2286 (_("%B: compiled with -mrelocatable and linked with "
2287 "modules compiled normally"), ibfd);
2288 }
2289 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
2290 && (old_flags & EF_PPC_RELOCATABLE) != 0)
2291 {
2292 error = TRUE;
2293 (*_bfd_error_handler)
2294 (_("%B: compiled normally and linked with "
2295 "modules compiled with -mrelocatable"), ibfd);
2296 }
2297
2298 /* The output is -mrelocatable-lib iff both the input files are. */
2299 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
2300 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
2301
2302 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
2303 but each input file is either -mrelocatable or -mrelocatable-lib. */
2304 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
2305 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
2306 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
2307 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
2308
2309 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
2310 any module uses it. */
2311 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
2312
2313 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2314 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2315
2316 /* Warn about any other mismatches. */
2317 if (new_flags != old_flags)
2318 {
2319 error = TRUE;
2320 (*_bfd_error_handler)
2321 (_("%B: uses different e_flags (0x%lx) fields "
2322 "than previous modules (0x%lx)"),
2323 ibfd, (long) new_flags, (long) old_flags);
2324 }
2325
2326 if (error)
2327 {
2328 bfd_set_error (bfd_error_bad_value);
2329 return FALSE;
2330 }
2331 }
2332
2333 return TRUE;
2334 }
2335 \f
2336 /* Handle a PowerPC specific section when reading an object file. This
2337 is called when elfcode.h finds a section with an unknown type. */
2338
2339 static bfd_boolean
2340 ppc_elf_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, const char *name)
2341 {
2342 asection *newsect;
2343 flagword flags;
2344
2345 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2346 return FALSE;
2347
2348 newsect = hdr->bfd_section;
2349 flags = bfd_get_section_flags (abfd, newsect);
2350 if (hdr->sh_flags & SHF_EXCLUDE)
2351 flags |= SEC_EXCLUDE;
2352
2353 if (hdr->sh_type == SHT_ORDERED)
2354 flags |= SEC_SORT_ENTRIES;
2355
2356 bfd_set_section_flags (abfd, newsect, flags);
2357 return TRUE;
2358 }
2359 \f
2360 /* Set up any other section flags and such that may be necessary. */
2361
2362 static bfd_boolean
2363 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2364 Elf_Internal_Shdr *shdr,
2365 asection *asect)
2366 {
2367 if ((asect->flags & SEC_EXCLUDE) != 0)
2368 shdr->sh_flags |= SHF_EXCLUDE;
2369
2370 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2371 shdr->sh_type = SHT_ORDERED;
2372
2373 return TRUE;
2374 }
2375 \f
2376 /* Find a linker generated pointer with a given addend and type. */
2377
2378 static elf_linker_section_pointers_t *
2379 elf_find_pointer_linker_section
2380 (elf_linker_section_pointers_t *linker_pointers,
2381 bfd_vma addend,
2382 elf_linker_section_t *lsect)
2383 {
2384 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2385 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2386 return linker_pointers;
2387
2388 return NULL;
2389 }
2390 \f
2391 /* Allocate a pointer to live in a linker created section. */
2392
2393 static bfd_boolean
2394 elf_create_pointer_linker_section (bfd *abfd,
2395 struct bfd_link_info *info,
2396 elf_linker_section_t *lsect,
2397 struct elf_link_hash_entry *h,
2398 const Elf_Internal_Rela *rel)
2399 {
2400 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2401 elf_linker_section_pointers_t *linker_section_ptr;
2402 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2403 bfd_size_type amt;
2404
2405 BFD_ASSERT (lsect != NULL);
2406
2407 /* Is this a global symbol? */
2408 if (h != NULL)
2409 {
2410 struct ppc_elf_link_hash_entry *eh;
2411
2412 /* Has this symbol already been allocated? If so, our work is done. */
2413 eh = (struct ppc_elf_link_hash_entry *) h;
2414 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2415 rel->r_addend,
2416 lsect))
2417 return TRUE;
2418
2419 ptr_linker_section_ptr = &eh->linker_section_pointer;
2420 /* Make sure this symbol is output as a dynamic symbol. */
2421 if (h->dynindx == -1)
2422 {
2423 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2424 return FALSE;
2425 }
2426
2427 if (lsect->rel_section)
2428 lsect->rel_section->size += sizeof (Elf32_External_Rela);
2429 }
2430 else
2431 {
2432 /* Allocation of a pointer to a local symbol. */
2433 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2434
2435 /* Allocate a table to hold the local symbols if first time. */
2436 if (!ptr)
2437 {
2438 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2439
2440 amt = num_symbols;
2441 amt *= sizeof (elf_linker_section_pointers_t *);
2442 ptr = bfd_zalloc (abfd, amt);
2443
2444 if (!ptr)
2445 return FALSE;
2446
2447 elf_local_ptr_offsets (abfd) = ptr;
2448 }
2449
2450 /* Has this symbol already been allocated? If so, our work is done. */
2451 if (elf_find_pointer_linker_section (ptr[r_symndx],
2452 rel->r_addend,
2453 lsect))
2454 return TRUE;
2455
2456 ptr_linker_section_ptr = &ptr[r_symndx];
2457
2458 if (info->shared)
2459 {
2460 /* If we are generating a shared object, we need to
2461 output a R_<xxx>_RELATIVE reloc so that the
2462 dynamic linker can adjust this GOT entry. */
2463 BFD_ASSERT (lsect->rel_section != NULL);
2464 lsect->rel_section->size += sizeof (Elf32_External_Rela);
2465 }
2466 }
2467
2468 /* Allocate space for a pointer in the linker section, and allocate
2469 a new pointer record from internal memory. */
2470 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2471 amt = sizeof (elf_linker_section_pointers_t);
2472 linker_section_ptr = bfd_alloc (abfd, amt);
2473
2474 if (!linker_section_ptr)
2475 return FALSE;
2476
2477 linker_section_ptr->next = *ptr_linker_section_ptr;
2478 linker_section_ptr->addend = rel->r_addend;
2479 linker_section_ptr->lsect = lsect;
2480 linker_section_ptr->written_address_p = FALSE;
2481 *ptr_linker_section_ptr = linker_section_ptr;
2482
2483 linker_section_ptr->offset = lsect->section->size;
2484 lsect->section->size += 4;
2485
2486 #ifdef DEBUG
2487 fprintf (stderr,
2488 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2489 lsect->name, (long) linker_section_ptr->offset,
2490 (long) lsect->section->size);
2491 #endif
2492
2493 return TRUE;
2494 }
2495 \f
2496 #define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR)
2497
2498 /* Fill in the address for a pointer generated in a linker section. */
2499
2500 static bfd_vma
2501 elf_finish_pointer_linker_section (bfd *output_bfd,
2502 bfd *input_bfd,
2503 struct bfd_link_info *info,
2504 elf_linker_section_t *lsect,
2505 struct elf_link_hash_entry *h,
2506 bfd_vma relocation,
2507 const Elf_Internal_Rela *rel,
2508 int relative_reloc)
2509 {
2510 elf_linker_section_pointers_t *linker_section_ptr;
2511
2512 BFD_ASSERT (lsect != NULL);
2513
2514 if (h != NULL)
2515 {
2516 /* Handle global symbol. */
2517 struct ppc_elf_link_hash_entry *eh;
2518
2519 eh = (struct ppc_elf_link_hash_entry *) h;
2520 linker_section_ptr
2521 = elf_find_pointer_linker_section (eh->linker_section_pointer,
2522 rel->r_addend,
2523 lsect);
2524
2525 BFD_ASSERT (linker_section_ptr != NULL);
2526
2527 if (! elf_hash_table (info)->dynamic_sections_created
2528 || (info->shared
2529 && info->symbolic
2530 && h->def_regular))
2531 {
2532 /* This is actually a static link, or it is a
2533 -Bsymbolic link and the symbol is defined
2534 locally. We must initialize this entry in the
2535 global section.
2536
2537 When doing a dynamic link, we create a .rela.<xxx>
2538 relocation entry to initialize the value. This
2539 is done in the finish_dynamic_symbol routine. */
2540 if (!linker_section_ptr->written_address_p)
2541 {
2542 linker_section_ptr->written_address_p = TRUE;
2543 bfd_put_ptr (output_bfd,
2544 relocation + linker_section_ptr->addend,
2545 (lsect->section->contents
2546 + linker_section_ptr->offset));
2547 }
2548 }
2549 }
2550 else
2551 {
2552 /* Handle local symbol. */
2553 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2554 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
2555 BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
2556 linker_section_ptr = (elf_find_pointer_linker_section
2557 (elf_local_ptr_offsets (input_bfd)[r_symndx],
2558 rel->r_addend,
2559 lsect));
2560
2561 BFD_ASSERT (linker_section_ptr != NULL);
2562
2563 /* Write out pointer if it hasn't been rewritten out before. */
2564 if (!linker_section_ptr->written_address_p)
2565 {
2566 linker_section_ptr->written_address_p = TRUE;
2567 bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
2568 lsect->section->contents + linker_section_ptr->offset);
2569
2570 if (info->shared)
2571 {
2572 /* We need to generate a relative reloc for the dynamic
2573 linker. */
2574
2575 asection *srel = lsect->rel_section;
2576 Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL];
2577 bfd_byte *erel;
2578 const struct elf_backend_data *bed;
2579 unsigned int i;
2580
2581 BFD_ASSERT (srel != NULL);
2582
2583 bed = get_elf_backend_data (output_bfd);
2584 for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
2585 {
2586 outrel[i].r_offset = (lsect->section->output_section->vma
2587 + lsect->section->output_offset
2588 + linker_section_ptr->offset);
2589 outrel[i].r_info = 0;
2590 outrel[i].r_addend = 0;
2591 }
2592 outrel[0].r_info = ELF32_R_INFO (0, relative_reloc);
2593 erel = lsect->section->contents;
2594 erel += (elf_section_data (lsect->section)->rel_count++
2595 * sizeof (Elf32_External_Rela));
2596 bfd_elf32_swap_reloca_out (output_bfd, outrel, erel);
2597 }
2598 }
2599 }
2600
2601 relocation = (lsect->section->output_offset
2602 + linker_section_ptr->offset
2603 - lsect->sym_offset);
2604
2605 #ifdef DEBUG
2606 fprintf (stderr,
2607 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
2608 lsect->name, (long) relocation, (long) relocation);
2609 #endif
2610
2611 /* Subtract out the addend, because it will get added back in by the normal
2612 processing. */
2613 return relocation - linker_section_ptr->addend;
2614 }
2615 \f
2616 /* Create a special linker section */
2617 static elf_linker_section_t *
2618 ppc_elf_create_linker_section (bfd *abfd,
2619 struct bfd_link_info *info,
2620 enum elf_linker_section_enum which)
2621 {
2622 elf_linker_section_t *lsect;
2623 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2624 asection *s, *sym_sec;
2625 bfd_size_type amt;
2626 flagword flags;
2627 const char *name;
2628 const char *rel_name;
2629 const char *sym_name;
2630 bfd_vma sym_offset;
2631
2632 /* Both of these sections are (technically) created by the user
2633 putting data in them, so they shouldn't be marked
2634 SEC_LINKER_CREATED.
2635
2636 The linker creates them so it has somewhere to attach their
2637 respective symbols. In fact, if they were empty it would
2638 be OK to leave the symbol set to 0 (or any random number), because
2639 the appropriate register should never be used. */
2640 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
2641 sym_offset = 32768;
2642
2643 switch (which)
2644 {
2645 default:
2646 abort ();
2647 return NULL;
2648
2649 case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
2650 name = ".sdata";
2651 rel_name = ".rela.sdata";
2652 sym_name = "_SDA_BASE_";
2653 break;
2654
2655 case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
2656 name = ".sdata2";
2657 rel_name = ".rela.sdata2";
2658 sym_name = "_SDA2_BASE_";
2659 flags |= SEC_READONLY;
2660 break;
2661 }
2662
2663 /* Record the first bfd that needs the special sections. */
2664 if (!htab->elf.dynobj)
2665 htab->elf.dynobj = abfd;
2666
2667 amt = sizeof (elf_linker_section_t);
2668 lsect = bfd_zalloc (htab->elf.dynobj, amt);
2669
2670 lsect->sym_offset = sym_offset;
2671
2672 /* See if the sections already exist. */
2673 sym_sec = s = bfd_get_section_by_name (htab->elf.dynobj, name);
2674 if (s == NULL || (s->flags & flags) != flags)
2675 {
2676 s = bfd_make_section_anyway (htab->elf.dynobj, name);
2677 if (s == NULL
2678 || !bfd_set_section_flags (htab->elf.dynobj, s, flags))
2679 return NULL;
2680 if (sym_sec == NULL)
2681 sym_sec = s;
2682 }
2683 lsect->section = s;
2684
2685 if (bfd_get_section_alignment (htab->elf.dynobj, s) < 2
2686 && !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2687 return NULL;
2688
2689 s->size = align_power (s->size, 2);
2690
2691 #ifdef DEBUG
2692 fprintf (stderr, "Creating section %s, current size = %ld\n",
2693 name, (long) s->size);
2694 #endif
2695
2696 if (sym_name)
2697 {
2698 struct elf_link_hash_entry *h;
2699 struct bfd_link_hash_entry *bh;
2700
2701 #ifdef DEBUG
2702 fprintf (stderr, "Adding %s to section %s\n", sym_name, name);
2703 #endif
2704 bh = bfd_link_hash_lookup (info->hash, sym_name,
2705 FALSE, FALSE, FALSE);
2706
2707 if ((bh == NULL || bh->type == bfd_link_hash_undefined)
2708 && !(_bfd_generic_link_add_one_symbol
2709 (info, abfd, sym_name, BSF_GLOBAL, sym_sec, sym_offset, NULL,
2710 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
2711 return NULL;
2712 h = (struct elf_link_hash_entry *) bh;
2713
2714 h->type = STT_OBJECT;
2715 lsect->sym_hash = h;
2716
2717 if (info->shared
2718 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2719 return NULL;
2720 }
2721
2722 if (info->shared)
2723 {
2724 s = bfd_make_section_anyway (htab->elf.dynobj, rel_name);
2725 lsect->rel_section = s;
2726 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2727 | SEC_LINKER_CREATED | SEC_READONLY);
2728 if (s == NULL
2729 || ! bfd_set_section_flags (htab->elf.dynobj, s, flags)
2730 || ! bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2731 return NULL;
2732 }
2733
2734 return lsect;
2735 }
2736 \f
2737 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
2738 need to bump up the number of section headers. */
2739
2740 static int
2741 ppc_elf_additional_program_headers (bfd *abfd)
2742 {
2743 asection *s;
2744 int ret;
2745
2746 ret = 0;
2747
2748 s = bfd_get_section_by_name (abfd, ".interp");
2749 if (s != NULL)
2750 ++ret;
2751
2752 s = bfd_get_section_by_name (abfd, ".sbss2");
2753 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->size > 0)
2754 ++ret;
2755
2756 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2757 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->size > 0)
2758 ++ret;
2759
2760 return ret;
2761 }
2762 \f
2763 /* The powerpc .got has a blrl instruction in it. Mark it executable. */
2764
2765 static bfd_boolean
2766 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2767 {
2768 struct ppc_elf_link_hash_table *htab;
2769 asection *s;
2770 flagword flags;
2771
2772 if (!_bfd_elf_create_got_section (abfd, info))
2773 return FALSE;
2774
2775 htab = ppc_elf_hash_table (info);
2776 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2777 if (s == NULL)
2778 abort ();
2779
2780 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2781 | SEC_LINKER_CREATED);
2782 if (!bfd_set_section_flags (abfd, s, flags))
2783 return FALSE;
2784
2785 htab->relgot = bfd_make_section (abfd, ".rela.got");
2786 if (!htab->relgot
2787 || ! bfd_set_section_flags (abfd, htab->relgot,
2788 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2789 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2790 | SEC_READONLY))
2791 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2792 return FALSE;
2793
2794 return TRUE;
2795 }
2796
2797 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2798 to output sections (just like _bfd_elf_create_dynamic_sections has
2799 to create .dynbss and .rela.bss). */
2800
2801 static bfd_boolean
2802 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2803 {
2804 struct ppc_elf_link_hash_table *htab;
2805 asection *s;
2806 flagword flags;
2807
2808 htab = ppc_elf_hash_table (info);
2809
2810 if (htab->got == NULL
2811 && !ppc_elf_create_got (abfd, info))
2812 return FALSE;
2813
2814 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2815 return FALSE;
2816
2817 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2818 | SEC_LINKER_CREATED);
2819
2820 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2821 htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
2822 if (s == NULL
2823 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
2824 return FALSE;
2825
2826 if (! info->shared)
2827 {
2828 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2829 htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss");
2830 if (s == NULL
2831 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
2832 || ! bfd_set_section_alignment (abfd, s, 2))
2833 return FALSE;
2834 }
2835
2836 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2837 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2838 if (s == NULL)
2839 abort ();
2840
2841 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
2842 return bfd_set_section_flags (abfd, s, flags);
2843 }
2844
2845 /* Adjust a symbol defined by a dynamic object and referenced by a
2846 regular object. The current definition is in some section of the
2847 dynamic object, but we're not including those sections. We have to
2848 change the definition to something the rest of the link can
2849 understand. */
2850
2851 static bfd_boolean
2852 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2853 struct elf_link_hash_entry *h)
2854 {
2855 struct ppc_elf_link_hash_table *htab;
2856 asection *s;
2857 unsigned int power_of_two;
2858
2859 #ifdef DEBUG
2860 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
2861 h->root.root.string);
2862 #endif
2863
2864 /* Make sure we know what is going on here. */
2865 htab = ppc_elf_hash_table (info);
2866 BFD_ASSERT (htab->elf.dynobj != NULL
2867 && (h->needs_plt
2868 || h->u.weakdef != NULL
2869 || (h->def_dynamic
2870 && h->ref_regular
2871 && !h->def_regular)));
2872
2873 /* Deal with function syms. */
2874 if (h->type == STT_FUNC
2875 || h->needs_plt)
2876 {
2877 /* Clear procedure linkage table information for any symbol that
2878 won't need a .plt entry. */
2879 if (h->plt.refcount <= 0
2880 || SYMBOL_CALLS_LOCAL (info, h)
2881 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2882 && h->root.type == bfd_link_hash_undefweak))
2883 {
2884 /* A PLT entry is not required/allowed when:
2885
2886 1. We are not using ld.so; because then the PLT entry
2887 can't be set up, so we can't use one. In this case,
2888 ppc_elf_adjust_dynamic_symbol won't even be called.
2889
2890 2. GC has rendered the entry unused.
2891
2892 3. We know for certain that a call to this symbol
2893 will go to this object, or will remain undefined. */
2894 h->plt.offset = (bfd_vma) -1;
2895 h->needs_plt = 0;
2896 }
2897 return TRUE;
2898 }
2899 else
2900 h->plt.offset = (bfd_vma) -1;
2901
2902 /* If this is a weak symbol, and there is a real definition, the
2903 processor independent code will have arranged for us to see the
2904 real definition first, and we can just use the same value. */
2905 if (h->u.weakdef != NULL)
2906 {
2907 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2908 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2909 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2910 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2911 if (ELIMINATE_COPY_RELOCS)
2912 h->non_got_ref = h->u.weakdef->non_got_ref;
2913 return TRUE;
2914 }
2915
2916 /* This is a reference to a symbol defined by a dynamic object which
2917 is not a function. */
2918
2919 /* If we are creating a shared library, we must presume that the
2920 only references to the symbol are via the global offset table.
2921 For such cases we need not do anything here; the relocations will
2922 be handled correctly by relocate_section. */
2923 if (info->shared)
2924 return TRUE;
2925
2926 /* If there are no references to this symbol that do not use the
2927 GOT, we don't need to generate a copy reloc. */
2928 if (!h->non_got_ref)
2929 return TRUE;
2930
2931 if (ELIMINATE_COPY_RELOCS)
2932 {
2933 struct ppc_elf_dyn_relocs *p;
2934 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
2935 {
2936 s = p->sec->output_section;
2937 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2938 break;
2939 }
2940
2941 /* If we didn't find any dynamic relocs in read-only sections, then
2942 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2943 if (p == NULL)
2944 {
2945 h->non_got_ref = 0;
2946 return TRUE;
2947 }
2948 }
2949
2950 /* We must allocate the symbol in our .dynbss section, which will
2951 become part of the .bss section of the executable. There will be
2952 an entry for this symbol in the .dynsym section. The dynamic
2953 object will contain position independent code, so all references
2954 from the dynamic object to this symbol will go through the global
2955 offset table. The dynamic linker will use the .dynsym entry to
2956 determine the address it must put in the global offset table, so
2957 both the dynamic object and the regular object will refer to the
2958 same memory location for the variable.
2959
2960 Of course, if the symbol is sufficiently small, we must instead
2961 allocate it in .sbss. FIXME: It would be better to do this if and
2962 only if there were actually SDAREL relocs for that symbol. */
2963
2964 if (h->size <= elf_gp_size (htab->elf.dynobj))
2965 s = htab->dynsbss;
2966 else
2967 s = htab->dynbss;
2968 BFD_ASSERT (s != NULL);
2969
2970 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
2971 copy the initial value out of the dynamic object and into the
2972 runtime process image. We need to remember the offset into the
2973 .rela.bss section we are going to use. */
2974 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2975 {
2976 asection *srel;
2977
2978 if (h->size <= elf_gp_size (htab->elf.dynobj))
2979 srel = htab->relsbss;
2980 else
2981 srel = htab->relbss;
2982 BFD_ASSERT (srel != NULL);
2983 srel->size += sizeof (Elf32_External_Rela);
2984 h->needs_copy = 1;
2985 }
2986
2987 /* We need to figure out the alignment required for this symbol. I
2988 have no idea how ELF linkers handle this. */
2989 power_of_two = bfd_log2 (h->size);
2990 if (power_of_two > 4)
2991 power_of_two = 4;
2992
2993 /* Apply the required alignment. */
2994 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
2995 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
2996 {
2997 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
2998 return FALSE;
2999 }
3000
3001 /* Define the symbol as being at this point in the section. */
3002 h->root.u.def.section = s;
3003 h->root.u.def.value = s->size;
3004
3005 /* Increment the section size to make room for the symbol. */
3006 s->size += h->size;
3007
3008 return TRUE;
3009 }
3010 \f
3011 /* Of those relocs that might be copied as dynamic relocs, this macro
3012 selects those that must be copied when linking a shared library,
3013 even when the symbol is local. */
3014
3015 #define MUST_BE_DYN_RELOC(RTYPE) \
3016 ((RTYPE) != R_PPC_REL24 \
3017 && (RTYPE) != R_PPC_REL14 \
3018 && (RTYPE) != R_PPC_REL14_BRTAKEN \
3019 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
3020 && (RTYPE) != R_PPC_REL32)
3021
3022 /* Allocate space in associated reloc sections for dynamic relocs. */
3023
3024 static bfd_boolean
3025 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3026 {
3027 struct bfd_link_info *info = inf;
3028 struct ppc_elf_link_hash_entry *eh;
3029 struct ppc_elf_link_hash_table *htab;
3030 struct ppc_elf_dyn_relocs *p;
3031
3032 if (h->root.type == bfd_link_hash_indirect)
3033 return TRUE;
3034
3035 if (h->root.type == bfd_link_hash_warning)
3036 /* When warning symbols are created, they **replace** the "real"
3037 entry in the hash table, thus we never get to see the real
3038 symbol in a hash traversal. So look at it now. */
3039 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3040
3041 htab = ppc_elf_hash_table (info);
3042 if (htab->elf.dynamic_sections_created
3043 && h->plt.refcount > 0)
3044 {
3045 /* Make sure this symbol is output as a dynamic symbol. */
3046 if (h->dynindx == -1
3047 && !h->forced_local)
3048 {
3049 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3050 return FALSE;
3051 }
3052
3053 if (info->shared
3054 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3055 {
3056 asection *s = htab->plt;
3057
3058 /* If this is the first .plt entry, make room for the special
3059 first entry. */
3060 if (s->size == 0)
3061 s->size += PLT_INITIAL_ENTRY_SIZE;
3062
3063 /* The PowerPC PLT is actually composed of two parts, the
3064 first part is 2 words (for a load and a jump), and then
3065 there is a remaining word available at the end. */
3066 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
3067 + (PLT_SLOT_SIZE
3068 * ((s->size - PLT_INITIAL_ENTRY_SIZE)
3069 / PLT_ENTRY_SIZE)));
3070
3071 /* If this symbol is not defined in a regular file, and we
3072 are not generating a shared library, then set the symbol
3073 to this location in the .plt. This is required to make
3074 function pointers compare as equal between the normal
3075 executable and the shared library. */
3076 if (! info->shared
3077 && !h->def_regular)
3078 {
3079 h->root.u.def.section = s;
3080 h->root.u.def.value = h->plt.offset;
3081 }
3082
3083 /* Make room for this entry. After the 8192nd entry, room
3084 for two entries is allocated. */
3085 s->size += PLT_ENTRY_SIZE;
3086 if ((s->size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
3087 > PLT_NUM_SINGLE_ENTRIES)
3088 s->size += PLT_ENTRY_SIZE;
3089
3090 /* We also need to make an entry in the .rela.plt section. */
3091 htab->relplt->size += sizeof (Elf32_External_Rela);
3092 }
3093 else
3094 {
3095 h->plt.offset = (bfd_vma) -1;
3096 h->needs_plt = 0;
3097 }
3098 }
3099 else
3100 {
3101 h->plt.offset = (bfd_vma) -1;
3102 h->needs_plt = 0;
3103 }
3104
3105 eh = (struct ppc_elf_link_hash_entry *) h;
3106 if (eh->elf.got.refcount > 0)
3107 {
3108 /* Make sure this symbol is output as a dynamic symbol. */
3109 if (eh->elf.dynindx == -1
3110 && !eh->elf.forced_local)
3111 {
3112 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
3113 return FALSE;
3114 }
3115
3116 if (eh->tls_mask == (TLS_TLS | TLS_LD)
3117 && !eh->elf.def_dynamic)
3118 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
3119 eh->elf.got.offset = (bfd_vma) -1;
3120 else
3121 {
3122 bfd_boolean dyn;
3123 eh->elf.got.offset = htab->got->size;
3124 if ((eh->tls_mask & TLS_TLS) != 0)
3125 {
3126 if ((eh->tls_mask & TLS_LD) != 0)
3127 htab->got->size += 8;
3128 if ((eh->tls_mask & TLS_GD) != 0)
3129 htab->got->size += 8;
3130 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
3131 htab->got->size += 4;
3132 if ((eh->tls_mask & TLS_DTPREL) != 0)
3133 htab->got->size += 4;
3134 }
3135 else
3136 htab->got->size += 4;
3137 dyn = htab->elf.dynamic_sections_created;
3138 if ((info->shared
3139 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
3140 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
3141 || eh->elf.root.type != bfd_link_hash_undefweak))
3142 {
3143 /* All the entries we allocated need relocs. */
3144 htab->relgot->size
3145 += ((htab->got->size - eh->elf.got.offset) / 4
3146 * sizeof (Elf32_External_Rela));
3147 /* Except LD only needs one. */
3148 if ((eh->tls_mask & TLS_LD) != 0)
3149 htab->relgot->size -= sizeof (Elf32_External_Rela);
3150 }
3151 }
3152 }
3153 else
3154 eh->elf.got.offset = (bfd_vma) -1;
3155
3156 if (eh->dyn_relocs == NULL)
3157 return TRUE;
3158
3159 /* In the shared -Bsymbolic case, discard space allocated for
3160 dynamic pc-relative relocs against symbols which turn out to be
3161 defined in regular objects. For the normal shared case, discard
3162 space for relocs that have become local due to symbol visibility
3163 changes. */
3164
3165 if (info->shared)
3166 {
3167 /* Relocs that use pc_count are those that appear on a call insn,
3168 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
3169 generated via assembly. We want calls to protected symbols to
3170 resolve directly to the function rather than going via the plt.
3171 If people want function pointer comparisons to work as expected
3172 then they should avoid writing weird assembly. */
3173 if (SYMBOL_CALLS_LOCAL (info, h))
3174 {
3175 struct ppc_elf_dyn_relocs **pp;
3176
3177 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3178 {
3179 p->count -= p->pc_count;
3180 p->pc_count = 0;
3181 if (p->count == 0)
3182 *pp = p->next;
3183 else
3184 pp = &p->next;
3185 }
3186 }
3187
3188 /* Also discard relocs on undefined weak syms with non-default
3189 visibility. */
3190 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3191 && h->root.type == bfd_link_hash_undefweak)
3192 eh->dyn_relocs = NULL;
3193
3194 /* Make sure undefined weak symbols are output as a dynamic symbol
3195 in PIEs. */
3196 if (info->pie
3197 && eh->dyn_relocs != NULL
3198 && h->dynindx == -1
3199 && h->root.type == bfd_link_hash_undefweak
3200 && !h->forced_local)
3201 {
3202 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3203 return FALSE;
3204 }
3205 }
3206 else if (ELIMINATE_COPY_RELOCS)
3207 {
3208 /* For the non-shared case, discard space for relocs against
3209 symbols which turn out to need copy relocs or are not
3210 dynamic. */
3211
3212 if (!h->non_got_ref
3213 && h->def_dynamic
3214 && !h->def_regular)
3215 {
3216 /* Make sure this symbol is output as a dynamic symbol.
3217 Undefined weak syms won't yet be marked as dynamic. */
3218 if (h->dynindx == -1
3219 && !h->forced_local)
3220 {
3221 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3222 return FALSE;
3223 }
3224
3225 /* If that succeeded, we know we'll be keeping all the
3226 relocs. */
3227 if (h->dynindx != -1)
3228 goto keep;
3229 }
3230
3231 eh->dyn_relocs = NULL;
3232
3233 keep: ;
3234 }
3235
3236 /* Finally, allocate space. */
3237 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3238 {
3239 asection *sreloc = elf_section_data (p->sec)->sreloc;
3240 sreloc->size += p->count * sizeof (Elf32_External_Rela);
3241 }
3242
3243 return TRUE;
3244 }
3245
3246 /* Find any dynamic relocs that apply to read-only sections. */
3247
3248 static bfd_boolean
3249 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
3250 {
3251 struct ppc_elf_dyn_relocs *p;
3252
3253 if (h->root.type == bfd_link_hash_indirect)
3254 return TRUE;
3255
3256 if (h->root.type == bfd_link_hash_warning)
3257 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3258
3259 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3260 {
3261 asection *s = p->sec->output_section;
3262
3263 if (s != NULL
3264 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
3265 == (SEC_READONLY | SEC_ALLOC)))
3266 {
3267 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
3268
3269 /* Not an error, just cut short the traversal. */
3270 return FALSE;
3271 }
3272 }
3273 return TRUE;
3274 }
3275
3276 /* Set the sizes of the dynamic sections. */
3277
3278 static bfd_boolean
3279 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3280 struct bfd_link_info *info)
3281 {
3282 struct ppc_elf_link_hash_table *htab;
3283 asection *s;
3284 bfd_boolean relocs;
3285 bfd *ibfd;
3286
3287 #ifdef DEBUG
3288 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
3289 #endif
3290
3291 htab = ppc_elf_hash_table (info);
3292 BFD_ASSERT (htab->elf.dynobj != NULL);
3293
3294 if (elf_hash_table (info)->dynamic_sections_created)
3295 {
3296 /* Set the contents of the .interp section to the interpreter. */
3297 if (info->executable)
3298 {
3299 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
3300 BFD_ASSERT (s != NULL);
3301 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3302 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3303 }
3304 }
3305
3306 if (htab->tlsld_got.refcount > 0)
3307 {
3308 htab->tlsld_got.offset = htab->got->size;
3309 htab->got->size += 8;
3310 if (info->shared)
3311 htab->relgot->size += sizeof (Elf32_External_Rela);
3312 }
3313 else
3314 htab->tlsld_got.offset = (bfd_vma) -1;
3315
3316 /* Set up .got offsets for local syms, and space for local dynamic
3317 relocs. */
3318 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3319 {
3320 bfd_signed_vma *local_got;
3321 bfd_signed_vma *end_local_got;
3322 char *lgot_masks;
3323 bfd_size_type locsymcount;
3324 Elf_Internal_Shdr *symtab_hdr;
3325 asection *srel;
3326
3327 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
3328 continue;
3329
3330 for (s = ibfd->sections; s != NULL; s = s->next)
3331 {
3332 struct ppc_elf_dyn_relocs *p;
3333
3334 for (p = ((struct ppc_elf_dyn_relocs *)
3335 elf_section_data (s)->local_dynrel);
3336 p != NULL;
3337 p = p->next)
3338 {
3339 if (!bfd_is_abs_section (p->sec)
3340 && bfd_is_abs_section (p->sec->output_section))
3341 {
3342 /* Input section has been discarded, either because
3343 it is a copy of a linkonce section or due to
3344 linker script /DISCARD/, so we'll be discarding
3345 the relocs too. */
3346 }
3347 else if (p->count != 0)
3348 {
3349 elf_section_data (p->sec)->sreloc->size
3350 += p->count * sizeof (Elf32_External_Rela);
3351 if ((p->sec->output_section->flags
3352 & (SEC_READONLY | SEC_ALLOC))
3353 == (SEC_READONLY | SEC_ALLOC))
3354 info->flags |= DF_TEXTREL;
3355 }
3356 }
3357 }
3358
3359 local_got = elf_local_got_refcounts (ibfd);
3360 if (!local_got)
3361 continue;
3362
3363 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3364 locsymcount = symtab_hdr->sh_info;
3365 end_local_got = local_got + locsymcount;
3366 lgot_masks = (char *) end_local_got;
3367 s = htab->got;
3368 srel = htab->relgot;
3369 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3370 if (*local_got > 0)
3371 {
3372 if (*lgot_masks == (TLS_TLS | TLS_LD))
3373 {
3374 /* If just an LD reloc, we'll just use
3375 htab->tlsld_got.offset. */
3376 if (htab->tlsld_got.offset == (bfd_vma) -1)
3377 {
3378 htab->tlsld_got.offset = s->size;
3379 s->size += 8;
3380 if (info->shared)
3381 srel->size += sizeof (Elf32_External_Rela);
3382 }
3383 *local_got = (bfd_vma) -1;
3384 }
3385 else
3386 {
3387 *local_got = s->size;
3388 if ((*lgot_masks & TLS_TLS) != 0)
3389 {
3390 if ((*lgot_masks & TLS_GD) != 0)
3391 s->size += 8;
3392 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
3393 s->size += 4;
3394 if ((*lgot_masks & TLS_DTPREL) != 0)
3395 s->size += 4;
3396 }
3397 else
3398 s->size += 4;
3399 if (info->shared)
3400 srel->size += ((s->size - *local_got) / 4
3401 * sizeof (Elf32_External_Rela));
3402 }
3403 }
3404 else
3405 *local_got = (bfd_vma) -1;
3406 }
3407
3408 /* Allocate space for global sym dynamic relocs. */
3409 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3410
3411 /* We've now determined the sizes of the various dynamic sections.
3412 Allocate memory for them. */
3413 relocs = FALSE;
3414 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
3415 {
3416 if ((s->flags & SEC_LINKER_CREATED) == 0)
3417 continue;
3418
3419 if (s == htab->plt
3420 || s == htab->got
3421 || (htab->sdata != NULL && s == htab->sdata->section)
3422 || (htab->sdata2 != NULL && s == htab->sdata2->section))
3423 {
3424 /* Strip this section if we don't need it; see the
3425 comment below. */
3426 }
3427 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
3428 {
3429 if (s->size == 0)
3430 {
3431 /* If we don't need this section, strip it from the
3432 output file. This is mostly to handle .rela.bss and
3433 .rela.plt. We must create both sections in
3434 create_dynamic_sections, because they must be created
3435 before the linker maps input sections to output
3436 sections. The linker does that before
3437 adjust_dynamic_symbol is called, and it is that
3438 function which decides whether anything needs to go
3439 into these sections. */
3440 }
3441 else
3442 {
3443 /* Remember whether there are any relocation sections. */
3444 relocs = TRUE;
3445
3446 /* We use the reloc_count field as a counter if we need
3447 to copy relocs into the output file. */
3448 s->reloc_count = 0;
3449 }
3450 }
3451 else
3452 {
3453 /* It's not one of our sections, so don't allocate space. */
3454 continue;
3455 }
3456
3457 if (s->size == 0)
3458 {
3459 _bfd_strip_section_from_output (info, s);
3460 continue;
3461 }
3462
3463 /* Allocate memory for the section contents. */
3464 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
3465 if (s->contents == NULL)
3466 return FALSE;
3467 }
3468
3469 if (htab->elf.dynamic_sections_created)
3470 {
3471 /* Add some entries to the .dynamic section. We fill in the
3472 values later, in ppc_elf_finish_dynamic_sections, but we
3473 must add the entries now so that we get the correct size for
3474 the .dynamic section. The DT_DEBUG entry is filled in by the
3475 dynamic linker and used by the debugger. */
3476 #define add_dynamic_entry(TAG, VAL) \
3477 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3478
3479 if (info->executable)
3480 {
3481 if (!add_dynamic_entry (DT_DEBUG, 0))
3482 return FALSE;
3483 }
3484
3485 if (htab->plt != NULL && htab->plt->size != 0)
3486 {
3487 if (!add_dynamic_entry (DT_PLTGOT, 0)
3488 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3489 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3490 || !add_dynamic_entry (DT_JMPREL, 0))
3491 return FALSE;
3492 }
3493
3494 if (relocs)
3495 {
3496 if (!add_dynamic_entry (DT_RELA, 0)
3497 || !add_dynamic_entry (DT_RELASZ, 0)
3498 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3499 return FALSE;
3500 }
3501
3502 /* If any dynamic relocs apply to a read-only section, then we
3503 need a DT_TEXTREL entry. */
3504 if ((info->flags & DF_TEXTREL) == 0)
3505 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
3506 info);
3507
3508 if ((info->flags & DF_TEXTREL) != 0)
3509 {
3510 if (!add_dynamic_entry (DT_TEXTREL, 0))
3511 return FALSE;
3512 }
3513 }
3514 #undef add_dynamic_entry
3515
3516 return TRUE;
3517 }
3518 \f
3519 static bfd_boolean
3520 update_local_sym_info (bfd *abfd,
3521 Elf_Internal_Shdr *symtab_hdr,
3522 unsigned long r_symndx,
3523 int tls_type)
3524 {
3525 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3526 char *local_got_tls_masks;
3527
3528 if (local_got_refcounts == NULL)
3529 {
3530 bfd_size_type size = symtab_hdr->sh_info;
3531
3532 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3533 local_got_refcounts = bfd_zalloc (abfd, size);
3534 if (local_got_refcounts == NULL)
3535 return FALSE;
3536 elf_local_got_refcounts (abfd) = local_got_refcounts;
3537 }
3538
3539 local_got_refcounts[r_symndx] += 1;
3540 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3541 local_got_tls_masks[r_symndx] |= tls_type;
3542 return TRUE;
3543 }
3544
3545 static void
3546 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3547 {
3548 (*_bfd_error_handler)
3549 (_("%B: relocation %s cannot be used when making a shared object"),
3550 abfd,
3551 ppc_elf_howto_table[r_type]->name);
3552 bfd_set_error (bfd_error_bad_value);
3553 }
3554
3555 /* Look through the relocs for a section during the first phase, and
3556 allocate space in the global offset table or procedure linkage
3557 table. */
3558
3559 static bfd_boolean
3560 ppc_elf_check_relocs (bfd *abfd,
3561 struct bfd_link_info *info,
3562 asection *sec,
3563 const Elf_Internal_Rela *relocs)
3564 {
3565 struct ppc_elf_link_hash_table *htab;
3566 Elf_Internal_Shdr *symtab_hdr;
3567 struct elf_link_hash_entry **sym_hashes;
3568 const Elf_Internal_Rela *rel;
3569 const Elf_Internal_Rela *rel_end;
3570 asection *sreloc;
3571
3572 if (info->relocatable)
3573 return TRUE;
3574
3575 #ifdef DEBUG
3576 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3577 sec, abfd);
3578 #endif
3579
3580 /* Initialize howto table if not already done. */
3581 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3582 ppc_elf_howto_init ();
3583
3584 /* Create the linker generated sections all the time so that the
3585 special symbols are created. */
3586 htab = ppc_elf_hash_table (info);
3587 if (htab->sdata == NULL)
3588 {
3589 htab->sdata = ppc_elf_create_linker_section (abfd, info,
3590 LINKER_SECTION_SDATA);
3591 if (htab->sdata == NULL)
3592 return FALSE;
3593 }
3594
3595 if (htab->sdata2 == NULL)
3596 {
3597 htab->sdata2 = ppc_elf_create_linker_section (abfd, info,
3598 LINKER_SECTION_SDATA2);
3599 if (htab->sdata2 == NULL)
3600 return FALSE;
3601 }
3602
3603 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3604 sym_hashes = elf_sym_hashes (abfd);
3605 sreloc = NULL;
3606
3607 rel_end = relocs + sec->reloc_count;
3608 for (rel = relocs; rel < rel_end; rel++)
3609 {
3610 unsigned long r_symndx;
3611 enum elf_ppc_reloc_type r_type;
3612 struct elf_link_hash_entry *h;
3613 int tls_type = 0;
3614
3615 r_symndx = ELF32_R_SYM (rel->r_info);
3616 if (r_symndx < symtab_hdr->sh_info)
3617 h = NULL;
3618 else
3619 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3620
3621 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3622 This shows up in particular in an R_PPC_ADDR32 in the eabi
3623 startup code. */
3624 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3625 {
3626 if (htab->got == NULL)
3627 {
3628 if (htab->elf.dynobj == NULL)
3629 htab->elf.dynobj = abfd;
3630 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3631 return FALSE;
3632 }
3633 }
3634
3635 r_type = ELF32_R_TYPE (rel->r_info);
3636 switch (r_type)
3637 {
3638 case R_PPC_GOT_TLSLD16:
3639 case R_PPC_GOT_TLSLD16_LO:
3640 case R_PPC_GOT_TLSLD16_HI:
3641 case R_PPC_GOT_TLSLD16_HA:
3642 htab->tlsld_got.refcount += 1;
3643 tls_type = TLS_TLS | TLS_LD;
3644 goto dogottls;
3645
3646 case R_PPC_GOT_TLSGD16:
3647 case R_PPC_GOT_TLSGD16_LO:
3648 case R_PPC_GOT_TLSGD16_HI:
3649 case R_PPC_GOT_TLSGD16_HA:
3650 tls_type = TLS_TLS | TLS_GD;
3651 goto dogottls;
3652
3653 case R_PPC_GOT_TPREL16:
3654 case R_PPC_GOT_TPREL16_LO:
3655 case R_PPC_GOT_TPREL16_HI:
3656 case R_PPC_GOT_TPREL16_HA:
3657 if (info->shared)
3658 info->flags |= DF_STATIC_TLS;
3659 tls_type = TLS_TLS | TLS_TPREL;
3660 goto dogottls;
3661
3662 case R_PPC_GOT_DTPREL16:
3663 case R_PPC_GOT_DTPREL16_LO:
3664 case R_PPC_GOT_DTPREL16_HI:
3665 case R_PPC_GOT_DTPREL16_HA:
3666 tls_type = TLS_TLS | TLS_DTPREL;
3667 dogottls:
3668 sec->has_tls_reloc = 1;
3669 /* Fall thru */
3670
3671 /* GOT16 relocations */
3672 case R_PPC_GOT16:
3673 case R_PPC_GOT16_LO:
3674 case R_PPC_GOT16_HI:
3675 case R_PPC_GOT16_HA:
3676 /* This symbol requires a global offset table entry. */
3677 if (htab->got == NULL)
3678 {
3679 if (htab->elf.dynobj == NULL)
3680 htab->elf.dynobj = abfd;
3681 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3682 return FALSE;
3683 }
3684 if (h != NULL)
3685 {
3686 h->got.refcount += 1;
3687 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3688 }
3689 else
3690 /* This is a global offset table entry for a local symbol. */
3691 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3692 return FALSE;
3693 break;
3694
3695 /* Indirect .sdata relocation. */
3696 case R_PPC_EMB_SDAI16:
3697 if (info->shared)
3698 {
3699 bad_shared_reloc (abfd, r_type);
3700 return FALSE;
3701 }
3702 if (!elf_create_pointer_linker_section (abfd, info,
3703 htab->sdata, h, rel))
3704 return FALSE;
3705 break;
3706
3707 /* Indirect .sdata2 relocation. */
3708 case R_PPC_EMB_SDA2I16:
3709 if (info->shared)
3710 {
3711 bad_shared_reloc (abfd, r_type);
3712 return FALSE;
3713 }
3714 if (!elf_create_pointer_linker_section (abfd, info,
3715 htab->sdata2, h, rel))
3716 return FALSE;
3717 break;
3718
3719 case R_PPC_SDAREL16:
3720 case R_PPC_EMB_SDA2REL:
3721 case R_PPC_EMB_SDA21:
3722 case R_PPC_EMB_RELSDA:
3723 case R_PPC_EMB_NADDR32:
3724 case R_PPC_EMB_NADDR16:
3725 case R_PPC_EMB_NADDR16_LO:
3726 case R_PPC_EMB_NADDR16_HI:
3727 case R_PPC_EMB_NADDR16_HA:
3728 if (info->shared)
3729 {
3730 bad_shared_reloc (abfd, r_type);
3731 return FALSE;
3732 }
3733 break;
3734
3735 case R_PPC_PLT32:
3736 case R_PPC_PLTREL24:
3737 case R_PPC_PLTREL32:
3738 case R_PPC_PLT16_LO:
3739 case R_PPC_PLT16_HI:
3740 case R_PPC_PLT16_HA:
3741 #ifdef DEBUG
3742 fprintf (stderr, "Reloc requires a PLT entry\n");
3743 #endif
3744 /* This symbol requires a procedure linkage table entry. We
3745 actually build the entry in finish_dynamic_symbol,
3746 because this might be a case of linking PIC code without
3747 linking in any dynamic objects, in which case we don't
3748 need to generate a procedure linkage table after all. */
3749
3750 if (h == NULL)
3751 {
3752 /* It does not make sense to have a procedure linkage
3753 table entry for a local symbol. */
3754 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3755 "local symbol"),
3756 abfd,
3757 sec,
3758 (long) rel->r_offset,
3759 ppc_elf_howto_table[r_type]->name);
3760 bfd_set_error (bfd_error_bad_value);
3761 return FALSE;
3762 }
3763
3764 h->needs_plt = 1;
3765 h->plt.refcount++;
3766 break;
3767
3768 /* The following relocations don't need to propagate the
3769 relocation if linking a shared object since they are
3770 section relative. */
3771 case R_PPC_SECTOFF:
3772 case R_PPC_SECTOFF_LO:
3773 case R_PPC_SECTOFF_HI:
3774 case R_PPC_SECTOFF_HA:
3775 case R_PPC_DTPREL16:
3776 case R_PPC_DTPREL16_LO:
3777 case R_PPC_DTPREL16_HI:
3778 case R_PPC_DTPREL16_HA:
3779 case R_PPC_TOC16:
3780 break;
3781
3782 /* This are just markers. */
3783 case R_PPC_TLS:
3784 case R_PPC_EMB_MRKREF:
3785 case R_PPC_NONE:
3786 case R_PPC_max:
3787 break;
3788
3789 /* These should only appear in dynamic objects. */
3790 case R_PPC_COPY:
3791 case R_PPC_GLOB_DAT:
3792 case R_PPC_JMP_SLOT:
3793 case R_PPC_RELATIVE:
3794 break;
3795
3796 /* These aren't handled yet. We'll report an error later. */
3797 case R_PPC_ADDR30:
3798 case R_PPC_EMB_RELSEC16:
3799 case R_PPC_EMB_RELST_LO:
3800 case R_PPC_EMB_RELST_HI:
3801 case R_PPC_EMB_RELST_HA:
3802 case R_PPC_EMB_BIT_FLD:
3803 break;
3804
3805 /* This refers only to functions defined in the shared library. */
3806 case R_PPC_LOCAL24PC:
3807 break;
3808
3809 /* This relocation describes the C++ object vtable hierarchy.
3810 Reconstruct it for later use during GC. */
3811 case R_PPC_GNU_VTINHERIT:
3812 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3813 return FALSE;
3814 break;
3815
3816 /* This relocation describes which C++ vtable entries are actually
3817 used. Record for later use during GC. */
3818 case R_PPC_GNU_VTENTRY:
3819 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3820 return FALSE;
3821 break;
3822
3823 /* We shouldn't really be seeing these. */
3824 case R_PPC_TPREL32:
3825 if (info->shared)
3826 info->flags |= DF_STATIC_TLS;
3827 goto dodyn;
3828
3829 /* Nor these. */
3830 case R_PPC_DTPMOD32:
3831 case R_PPC_DTPREL32:
3832 goto dodyn;
3833
3834 case R_PPC_TPREL16:
3835 case R_PPC_TPREL16_LO:
3836 case R_PPC_TPREL16_HI:
3837 case R_PPC_TPREL16_HA:
3838 if (info->shared)
3839 info->flags |= DF_STATIC_TLS;
3840 goto dodyn;
3841
3842 /* When creating a shared object, we must copy these
3843 relocs into the output file. We create a reloc
3844 section in dynobj and make room for the reloc. */
3845 case R_PPC_REL24:
3846 case R_PPC_REL14:
3847 case R_PPC_REL14_BRTAKEN:
3848 case R_PPC_REL14_BRNTAKEN:
3849 case R_PPC_REL32:
3850 if (h == NULL
3851 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3852 break;
3853 /* fall through */
3854
3855 case R_PPC_ADDR32:
3856 case R_PPC_ADDR24:
3857 case R_PPC_ADDR16:
3858 case R_PPC_ADDR16_LO:
3859 case R_PPC_ADDR16_HI:
3860 case R_PPC_ADDR16_HA:
3861 case R_PPC_ADDR14:
3862 case R_PPC_ADDR14_BRTAKEN:
3863 case R_PPC_ADDR14_BRNTAKEN:
3864 case R_PPC_UADDR32:
3865 case R_PPC_UADDR16:
3866 if (h != NULL && !info->shared)
3867 {
3868 /* We may need a plt entry if the symbol turns out to be
3869 a function defined in a dynamic object. */
3870 h->plt.refcount++;
3871
3872 /* We may need a copy reloc too. */
3873 h->non_got_ref = 1;
3874 }
3875
3876 dodyn:
3877 /* If we are creating a shared library, and this is a reloc
3878 against a global symbol, or a non PC relative reloc
3879 against a local symbol, then we need to copy the reloc
3880 into the shared library. However, if we are linking with
3881 -Bsymbolic, we do not need to copy a reloc against a
3882 global symbol which is defined in an object we are
3883 including in the link (i.e., DEF_REGULAR is set). At
3884 this point we have not seen all the input files, so it is
3885 possible that DEF_REGULAR is not set now but will be set
3886 later (it is never cleared). In case of a weak definition,
3887 DEF_REGULAR may be cleared later by a strong definition in
3888 a shared library. We account for that possibility below by
3889 storing information in the dyn_relocs field of the hash
3890 table entry. A similar situation occurs when creating
3891 shared libraries and symbol visibility changes render the
3892 symbol local.
3893
3894 If on the other hand, we are creating an executable, we
3895 may need to keep relocations for symbols satisfied by a
3896 dynamic library if we manage to avoid copy relocs for the
3897 symbol. */
3898 if ((info->shared
3899 && (MUST_BE_DYN_RELOC (r_type)
3900 || (h != NULL
3901 && (! info->symbolic
3902 || h->root.type == bfd_link_hash_defweak
3903 || !h->def_regular))))
3904 || (ELIMINATE_COPY_RELOCS
3905 && !info->shared
3906 && (sec->flags & SEC_ALLOC) != 0
3907 && h != NULL
3908 && (h->root.type == bfd_link_hash_defweak
3909 || !h->def_regular)))
3910 {
3911 struct ppc_elf_dyn_relocs *p;
3912 struct ppc_elf_dyn_relocs **head;
3913
3914 #ifdef DEBUG
3915 fprintf (stderr,
3916 "ppc_elf_check_relocs needs to "
3917 "create relocation for %s\n",
3918 (h && h->root.root.string
3919 ? h->root.root.string : "<unknown>"));
3920 #endif
3921 if (sreloc == NULL)
3922 {
3923 const char *name;
3924
3925 name = (bfd_elf_string_from_elf_section
3926 (abfd,
3927 elf_elfheader (abfd)->e_shstrndx,
3928 elf_section_data (sec)->rel_hdr.sh_name));
3929 if (name == NULL)
3930 return FALSE;
3931
3932 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3933 && strcmp (bfd_get_section_name (abfd, sec),
3934 name + 5) == 0);
3935
3936 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3937 if (sreloc == NULL)
3938 {
3939 flagword flags;
3940
3941 sreloc = bfd_make_section (htab->elf.dynobj, name);
3942 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3943 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3944 if ((sec->flags & SEC_ALLOC) != 0)
3945 flags |= SEC_ALLOC | SEC_LOAD;
3946 if (sreloc == NULL
3947 || ! bfd_set_section_flags (htab->elf.dynobj,
3948 sreloc, flags)
3949 || ! bfd_set_section_alignment (htab->elf.dynobj,
3950 sreloc, 2))
3951 return FALSE;
3952 }
3953 elf_section_data (sec)->sreloc = sreloc;
3954 }
3955
3956 /* If this is a global symbol, we count the number of
3957 relocations we need for this symbol. */
3958 if (h != NULL)
3959 {
3960 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3961 }
3962 else
3963 {
3964 /* Track dynamic relocs needed for local syms too.
3965 We really need local syms available to do this
3966 easily. Oh well. */
3967
3968 asection *s;
3969 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3970 sec, r_symndx);
3971 if (s == NULL)
3972 return FALSE;
3973
3974 head = ((struct ppc_elf_dyn_relocs **)
3975 &elf_section_data (s)->local_dynrel);
3976 }
3977
3978 p = *head;
3979 if (p == NULL || p->sec != sec)
3980 {
3981 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3982 if (p == NULL)
3983 return FALSE;
3984 p->next = *head;
3985 *head = p;
3986 p->sec = sec;
3987 p->count = 0;
3988 p->pc_count = 0;
3989 }
3990
3991 p->count += 1;
3992 if (!MUST_BE_DYN_RELOC (r_type))
3993 p->pc_count += 1;
3994 }
3995
3996 break;
3997 }
3998 }
3999
4000 return TRUE;
4001 }
4002
4003 /* Return the section that should be marked against GC for a given
4004 relocation. */
4005
4006 static asection *
4007 ppc_elf_gc_mark_hook (asection *sec,
4008 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4009 Elf_Internal_Rela *rel,
4010 struct elf_link_hash_entry *h,
4011 Elf_Internal_Sym *sym)
4012 {
4013 if (h != NULL)
4014 {
4015 switch (ELF32_R_TYPE (rel->r_info))
4016 {
4017 case R_PPC_GNU_VTINHERIT:
4018 case R_PPC_GNU_VTENTRY:
4019 break;
4020
4021 default:
4022 switch (h->root.type)
4023 {
4024 case bfd_link_hash_defined:
4025 case bfd_link_hash_defweak:
4026 return h->root.u.def.section;
4027
4028 case bfd_link_hash_common:
4029 return h->root.u.c.p->section;
4030
4031 default:
4032 break;
4033 }
4034 }
4035 }
4036 else
4037 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4038
4039 return NULL;
4040 }
4041
4042 /* Update the got, plt and dynamic reloc reference counts for the
4043 section being removed. */
4044
4045 static bfd_boolean
4046 ppc_elf_gc_sweep_hook (bfd *abfd,
4047 struct bfd_link_info *info,
4048 asection *sec,
4049 const Elf_Internal_Rela *relocs)
4050 {
4051 struct ppc_elf_link_hash_table *htab;
4052 Elf_Internal_Shdr *symtab_hdr;
4053 struct elf_link_hash_entry **sym_hashes;
4054 bfd_signed_vma *local_got_refcounts;
4055 const Elf_Internal_Rela *rel, *relend;
4056
4057 elf_section_data (sec)->local_dynrel = NULL;
4058
4059 htab = ppc_elf_hash_table (info);
4060 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4061 sym_hashes = elf_sym_hashes (abfd);
4062 local_got_refcounts = elf_local_got_refcounts (abfd);
4063
4064 relend = relocs + sec->reloc_count;
4065 for (rel = relocs; rel < relend; rel++)
4066 {
4067 unsigned long r_symndx;
4068 enum elf_ppc_reloc_type r_type;
4069 struct elf_link_hash_entry *h = NULL;
4070
4071 r_symndx = ELF32_R_SYM (rel->r_info);
4072 if (r_symndx >= symtab_hdr->sh_info)
4073 {
4074 struct ppc_elf_dyn_relocs **pp, *p;
4075 struct ppc_elf_link_hash_entry *eh;
4076
4077 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4078 eh = (struct ppc_elf_link_hash_entry *) h;
4079
4080 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4081 if (p->sec == sec)
4082 {
4083 /* Everything must go for SEC. */
4084 *pp = p->next;
4085 break;
4086 }
4087 }
4088
4089 r_type = ELF32_R_TYPE (rel->r_info);
4090 switch (r_type)
4091 {
4092 case R_PPC_GOT_TLSLD16:
4093 case R_PPC_GOT_TLSLD16_LO:
4094 case R_PPC_GOT_TLSLD16_HI:
4095 case R_PPC_GOT_TLSLD16_HA:
4096 htab->tlsld_got.refcount -= 1;
4097 /* Fall thru */
4098
4099 case R_PPC_GOT_TLSGD16:
4100 case R_PPC_GOT_TLSGD16_LO:
4101 case R_PPC_GOT_TLSGD16_HI:
4102 case R_PPC_GOT_TLSGD16_HA:
4103 case R_PPC_GOT_TPREL16:
4104 case R_PPC_GOT_TPREL16_LO:
4105 case R_PPC_GOT_TPREL16_HI:
4106 case R_PPC_GOT_TPREL16_HA:
4107 case R_PPC_GOT_DTPREL16:
4108 case R_PPC_GOT_DTPREL16_LO:
4109 case R_PPC_GOT_DTPREL16_HI:
4110 case R_PPC_GOT_DTPREL16_HA:
4111 case R_PPC_GOT16:
4112 case R_PPC_GOT16_LO:
4113 case R_PPC_GOT16_HI:
4114 case R_PPC_GOT16_HA:
4115 if (h != NULL)
4116 {
4117 if (h->got.refcount > 0)
4118 h->got.refcount--;
4119 }
4120 else if (local_got_refcounts != NULL)
4121 {
4122 if (local_got_refcounts[r_symndx] > 0)
4123 local_got_refcounts[r_symndx]--;
4124 }
4125 break;
4126
4127 case R_PPC_REL24:
4128 case R_PPC_REL14:
4129 case R_PPC_REL14_BRTAKEN:
4130 case R_PPC_REL14_BRNTAKEN:
4131 case R_PPC_REL32:
4132 if (h == NULL
4133 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4134 break;
4135 /* Fall thru */
4136
4137 case R_PPC_ADDR32:
4138 case R_PPC_ADDR24:
4139 case R_PPC_ADDR16:
4140 case R_PPC_ADDR16_LO:
4141 case R_PPC_ADDR16_HI:
4142 case R_PPC_ADDR16_HA:
4143 case R_PPC_ADDR14:
4144 case R_PPC_ADDR14_BRTAKEN:
4145 case R_PPC_ADDR14_BRNTAKEN:
4146 case R_PPC_UADDR32:
4147 case R_PPC_UADDR16:
4148 case R_PPC_PLT32:
4149 case R_PPC_PLTREL24:
4150 case R_PPC_PLT16_LO:
4151 case R_PPC_PLT16_HI:
4152 case R_PPC_PLT16_HA:
4153 if (h != NULL)
4154 {
4155 if (h->plt.refcount > 0)
4156 h->plt.refcount--;
4157 }
4158 break;
4159
4160 default:
4161 break;
4162 }
4163 }
4164 return TRUE;
4165 }
4166
4167 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4168
4169 asection *
4170 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4171 {
4172 struct ppc_elf_link_hash_table *htab;
4173
4174 htab = ppc_elf_hash_table (info);
4175 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4176 FALSE, FALSE, TRUE);
4177
4178 return _bfd_elf_tls_setup (obfd, info);
4179 }
4180
4181 /* Run through all the TLS relocs looking for optimization
4182 opportunities. */
4183
4184 bfd_boolean
4185 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4186 struct bfd_link_info *info)
4187 {
4188 bfd *ibfd;
4189 asection *sec;
4190 struct ppc_elf_link_hash_table *htab;
4191
4192 if (info->relocatable || info->shared)
4193 return TRUE;
4194
4195 htab = ppc_elf_hash_table (info);
4196 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4197 {
4198 Elf_Internal_Sym *locsyms = NULL;
4199 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4200
4201 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4202 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4203 {
4204 Elf_Internal_Rela *relstart, *rel, *relend;
4205 int expecting_tls_get_addr;
4206
4207 /* Read the relocations. */
4208 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4209 info->keep_memory);
4210 if (relstart == NULL)
4211 return FALSE;
4212
4213 expecting_tls_get_addr = 0;
4214 relend = relstart + sec->reloc_count;
4215 for (rel = relstart; rel < relend; rel++)
4216 {
4217 enum elf_ppc_reloc_type r_type;
4218 unsigned long r_symndx;
4219 struct elf_link_hash_entry *h = NULL;
4220 char *tls_mask;
4221 char tls_set, tls_clear;
4222 bfd_boolean is_local;
4223
4224 r_symndx = ELF32_R_SYM (rel->r_info);
4225 if (r_symndx >= symtab_hdr->sh_info)
4226 {
4227 struct elf_link_hash_entry **sym_hashes;
4228
4229 sym_hashes = elf_sym_hashes (ibfd);
4230 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4231 while (h->root.type == bfd_link_hash_indirect
4232 || h->root.type == bfd_link_hash_warning)
4233 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4234 }
4235
4236 is_local = FALSE;
4237 if (h == NULL
4238 || !h->def_dynamic)
4239 is_local = TRUE;
4240
4241 r_type = ELF32_R_TYPE (rel->r_info);
4242 switch (r_type)
4243 {
4244 case R_PPC_GOT_TLSLD16:
4245 case R_PPC_GOT_TLSLD16_LO:
4246 case R_PPC_GOT_TLSLD16_HI:
4247 case R_PPC_GOT_TLSLD16_HA:
4248 /* These relocs should never be against a symbol
4249 defined in a shared lib. Leave them alone if
4250 that turns out to be the case. */
4251 expecting_tls_get_addr = 0;
4252 htab->tlsld_got.refcount -= 1;
4253 if (!is_local)
4254 continue;
4255
4256 /* LD -> LE */
4257 tls_set = 0;
4258 tls_clear = TLS_LD;
4259 expecting_tls_get_addr = 1;
4260 break;
4261
4262 case R_PPC_GOT_TLSGD16:
4263 case R_PPC_GOT_TLSGD16_LO:
4264 case R_PPC_GOT_TLSGD16_HI:
4265 case R_PPC_GOT_TLSGD16_HA:
4266 if (is_local)
4267 /* GD -> LE */
4268 tls_set = 0;
4269 else
4270 /* GD -> IE */
4271 tls_set = TLS_TLS | TLS_TPRELGD;
4272 tls_clear = TLS_GD;
4273 expecting_tls_get_addr = 1;
4274 break;
4275
4276 case R_PPC_GOT_TPREL16:
4277 case R_PPC_GOT_TPREL16_LO:
4278 case R_PPC_GOT_TPREL16_HI:
4279 case R_PPC_GOT_TPREL16_HA:
4280 expecting_tls_get_addr = 0;
4281 if (is_local)
4282 {
4283 /* IE -> LE */
4284 tls_set = 0;
4285 tls_clear = TLS_TPREL;
4286 break;
4287 }
4288 else
4289 continue;
4290
4291 case R_PPC_REL14:
4292 case R_PPC_REL14_BRTAKEN:
4293 case R_PPC_REL14_BRNTAKEN:
4294 case R_PPC_REL24:
4295 if (expecting_tls_get_addr
4296 && h != NULL
4297 && h == htab->tls_get_addr)
4298 {
4299 if (h->plt.refcount > 0)
4300 h->plt.refcount -= 1;
4301 }
4302 expecting_tls_get_addr = 0;
4303 continue;
4304
4305 default:
4306 expecting_tls_get_addr = 0;
4307 continue;
4308 }
4309
4310 if (h != NULL)
4311 {
4312 if (tls_set == 0)
4313 {
4314 /* We managed to get rid of a got entry. */
4315 if (h->got.refcount > 0)
4316 h->got.refcount -= 1;
4317 }
4318 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4319 }
4320 else
4321 {
4322 Elf_Internal_Sym *sym;
4323 bfd_signed_vma *lgot_refs;
4324 char *lgot_masks;
4325
4326 if (locsyms == NULL)
4327 {
4328 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4329 if (locsyms == NULL)
4330 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4331 symtab_hdr->sh_info,
4332 0, NULL, NULL, NULL);
4333 if (locsyms == NULL)
4334 {
4335 if (elf_section_data (sec)->relocs != relstart)
4336 free (relstart);
4337 return FALSE;
4338 }
4339 }
4340 sym = locsyms + r_symndx;
4341 lgot_refs = elf_local_got_refcounts (ibfd);
4342 if (lgot_refs == NULL)
4343 abort ();
4344 if (tls_set == 0)
4345 {
4346 /* We managed to get rid of a got entry. */
4347 if (lgot_refs[r_symndx] > 0)
4348 lgot_refs[r_symndx] -= 1;
4349 }
4350 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4351 tls_mask = &lgot_masks[r_symndx];
4352 }
4353
4354 *tls_mask |= tls_set;
4355 *tls_mask &= ~tls_clear;
4356 }
4357
4358 if (elf_section_data (sec)->relocs != relstart)
4359 free (relstart);
4360 }
4361
4362 if (locsyms != NULL
4363 && (symtab_hdr->contents != (unsigned char *) locsyms))
4364 {
4365 if (!info->keep_memory)
4366 free (locsyms);
4367 else
4368 symtab_hdr->contents = (unsigned char *) locsyms;
4369 }
4370 }
4371 return TRUE;
4372 }
4373 \f
4374 /* Hook called by the linker routine which adds symbols from an object
4375 file. We use it to put .comm items in .sbss, and not .bss. */
4376
4377 static bfd_boolean
4378 ppc_elf_add_symbol_hook (bfd *abfd,
4379 struct bfd_link_info *info,
4380 Elf_Internal_Sym *sym,
4381 const char **namep ATTRIBUTE_UNUSED,
4382 flagword *flagsp ATTRIBUTE_UNUSED,
4383 asection **secp,
4384 bfd_vma *valp)
4385 {
4386 if (sym->st_shndx == SHN_COMMON
4387 && !info->relocatable
4388 && sym->st_size <= elf_gp_size (abfd)
4389 && (info->hash->creator == abfd->xvec
4390 || info->hash->creator == abfd->xvec->alternative_target))
4391 {
4392 /* Common symbols less than or equal to -G nn bytes are automatically
4393 put into .sbss. */
4394 struct ppc_elf_link_hash_table *htab;
4395
4396 htab = ppc_elf_hash_table (info);
4397 if (htab->sbss == NULL)
4398 {
4399 flagword flags = SEC_IS_COMMON;
4400
4401 htab->sbss = bfd_make_section_anyway (abfd, ".sbss");
4402 if (htab->sbss == NULL
4403 || ! bfd_set_section_flags (abfd, htab->sbss, flags))
4404 return FALSE;
4405 }
4406
4407 *secp = htab->sbss;
4408 *valp = sym->st_size;
4409 }
4410
4411 return TRUE;
4412 }
4413 \f
4414 /* Finish up dynamic symbol handling. We set the contents of various
4415 dynamic sections here. */
4416
4417 static bfd_boolean
4418 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
4419 struct bfd_link_info *info,
4420 struct elf_link_hash_entry *h,
4421 Elf_Internal_Sym *sym)
4422 {
4423 struct ppc_elf_link_hash_table *htab;
4424
4425 #ifdef DEBUG
4426 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
4427 h->root.root.string);
4428 #endif
4429
4430 htab = ppc_elf_hash_table (info);
4431 BFD_ASSERT (htab->elf.dynobj != NULL);
4432
4433 if (h->plt.offset != (bfd_vma) -1)
4434 {
4435 Elf_Internal_Rela rela;
4436 bfd_byte *loc;
4437 bfd_vma reloc_index;
4438
4439 #ifdef DEBUG
4440 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
4441 #endif
4442
4443 /* This symbol has an entry in the procedure linkage table. Set
4444 it up. */
4445
4446 BFD_ASSERT (h->dynindx != -1);
4447 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
4448
4449 /* We don't need to fill in the .plt. The ppc dynamic linker
4450 will fill it in. */
4451
4452 /* Fill in the entry in the .rela.plt section. */
4453 rela.r_offset = (htab->plt->output_section->vma
4454 + htab->plt->output_offset
4455 + h->plt.offset);
4456 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
4457 rela.r_addend = 0;
4458
4459 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
4460 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
4461 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
4462 loc = (htab->relplt->contents
4463 + reloc_index * sizeof (Elf32_External_Rela));
4464 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4465
4466 if (!h->def_regular)
4467 {
4468 /* Mark the symbol as undefined, rather than as defined in
4469 the .plt section. Leave the value alone. */
4470 sym->st_shndx = SHN_UNDEF;
4471 /* If the symbol is weak, we do need to clear the value.
4472 Otherwise, the PLT entry would provide a definition for
4473 the symbol even if the symbol wasn't defined anywhere,
4474 and so the symbol would never be NULL. */
4475 if (!h->ref_regular_nonweak)
4476 sym->st_value = 0;
4477 }
4478 }
4479
4480 if (h->needs_copy)
4481 {
4482 asection *s;
4483 Elf_Internal_Rela rela;
4484 bfd_byte *loc;
4485
4486 /* This symbols needs a copy reloc. Set it up. */
4487
4488 #ifdef DEBUG
4489 fprintf (stderr, ", copy");
4490 #endif
4491
4492 BFD_ASSERT (h->dynindx != -1);
4493
4494 if (h->size <= elf_gp_size (htab->elf.dynobj))
4495 s = htab->relsbss;
4496 else
4497 s = htab->relbss;
4498 BFD_ASSERT (s != NULL);
4499
4500 rela.r_offset = (h->root.u.def.value
4501 + h->root.u.def.section->output_section->vma
4502 + h->root.u.def.section->output_offset);
4503 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
4504 rela.r_addend = 0;
4505 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4506 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4507 }
4508
4509 #ifdef DEBUG
4510 fprintf (stderr, "\n");
4511 #endif
4512
4513 /* Mark some specially defined symbols as absolute. */
4514 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4515 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
4516 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
4517 sym->st_shndx = SHN_ABS;
4518
4519 return TRUE;
4520 }
4521 \f
4522 /* Finish up the dynamic sections. */
4523
4524 static bfd_boolean
4525 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
4526 struct bfd_link_info *info)
4527 {
4528 asection *sdyn;
4529 struct ppc_elf_link_hash_table *htab;
4530
4531 #ifdef DEBUG
4532 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
4533 #endif
4534
4535 htab = ppc_elf_hash_table (info);
4536 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
4537
4538 if (htab->elf.dynamic_sections_created)
4539 {
4540 Elf32_External_Dyn *dyncon, *dynconend;
4541
4542 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
4543
4544 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4545 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4546 for (; dyncon < dynconend; dyncon++)
4547 {
4548 Elf_Internal_Dyn dyn;
4549 asection *s;
4550
4551 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
4552
4553 switch (dyn.d_tag)
4554 {
4555 case DT_PLTGOT:
4556 s = htab->plt;
4557 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4558 break;
4559
4560 case DT_PLTRELSZ:
4561 dyn.d_un.d_val = htab->relplt->size;
4562 break;
4563
4564 case DT_JMPREL:
4565 s = htab->relplt;
4566 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4567 break;
4568
4569 default:
4570 continue;
4571 }
4572
4573 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4574 }
4575 }
4576
4577 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
4578 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
4579 if (htab->got)
4580 {
4581 unsigned char *contents = htab->got->contents;
4582 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
4583
4584 if (sdyn == NULL)
4585 bfd_put_32 (output_bfd, 0, contents + 4);
4586 else
4587 bfd_put_32 (output_bfd,
4588 sdyn->output_section->vma + sdyn->output_offset,
4589 contents + 4);
4590
4591 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
4592 }
4593
4594 return TRUE;
4595 }
4596 \f
4597 /* The RELOCATE_SECTION function is called by the ELF backend linker
4598 to handle the relocations for a section.
4599
4600 The relocs are always passed as Rela structures; if the section
4601 actually uses Rel structures, the r_addend field will always be
4602 zero.
4603
4604 This function is responsible for adjust the section contents as
4605 necessary, and (if using Rela relocs and generating a
4606 relocatable output file) adjusting the reloc addend as
4607 necessary.
4608
4609 This function does not have to worry about setting the reloc
4610 address or the reloc symbol index.
4611
4612 LOCAL_SYMS is a pointer to the swapped in local symbols.
4613
4614 LOCAL_SECTIONS is an array giving the section in the input file
4615 corresponding to the st_shndx field of each local symbol.
4616
4617 The global hash table entry for the global symbols can be found
4618 via elf_sym_hashes (input_bfd).
4619
4620 When generating relocatable output, this function must handle
4621 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
4622 going to be the section symbol corresponding to the output
4623 section, which means that the addend must be adjusted
4624 accordingly. */
4625
4626 static bfd_boolean
4627 ppc_elf_relocate_section (bfd *output_bfd,
4628 struct bfd_link_info *info,
4629 bfd *input_bfd,
4630 asection *input_section,
4631 bfd_byte *contents,
4632 Elf_Internal_Rela *relocs,
4633 Elf_Internal_Sym *local_syms,
4634 asection **local_sections)
4635 {
4636 Elf_Internal_Shdr *symtab_hdr;
4637 struct elf_link_hash_entry **sym_hashes;
4638 struct ppc_elf_link_hash_table *htab;
4639 Elf_Internal_Rela *rel;
4640 Elf_Internal_Rela *relend;
4641 Elf_Internal_Rela outrel;
4642 bfd_byte *loc;
4643 asection *sreloc = NULL;
4644 bfd_vma *local_got_offsets;
4645 bfd_boolean ret = TRUE;
4646
4647 #ifdef DEBUG
4648 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
4649 "%ld relocations%s",
4650 input_bfd, input_section,
4651 (long) input_section->reloc_count,
4652 (info->relocatable) ? " (relocatable)" : "");
4653 #endif
4654
4655 if (info->relocatable)
4656 return TRUE;
4657
4658 /* Initialize howto table if not already done. */
4659 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4660 ppc_elf_howto_init ();
4661
4662 htab = ppc_elf_hash_table (info);
4663 local_got_offsets = elf_local_got_offsets (input_bfd);
4664 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4665 sym_hashes = elf_sym_hashes (input_bfd);
4666 rel = relocs;
4667 relend = relocs + input_section->reloc_count;
4668 for (; rel < relend; rel++)
4669 {
4670 enum elf_ppc_reloc_type r_type;
4671 bfd_vma addend;
4672 bfd_reloc_status_type r;
4673 Elf_Internal_Sym *sym;
4674 asection *sec;
4675 struct elf_link_hash_entry *h;
4676 const char *sym_name;
4677 reloc_howto_type *howto;
4678 unsigned long r_symndx;
4679 bfd_vma relocation;
4680 bfd_vma branch_bit, insn, from;
4681 bfd_boolean unresolved_reloc;
4682 bfd_boolean warned;
4683 unsigned int tls_type, tls_mask, tls_gd;
4684
4685 r_type = ELF32_R_TYPE (rel->r_info);
4686 sym = NULL;
4687 sec = NULL;
4688 h = NULL;
4689 unresolved_reloc = FALSE;
4690 warned = FALSE;
4691 r_symndx = ELF32_R_SYM (rel->r_info);
4692
4693 if (r_symndx < symtab_hdr->sh_info)
4694 {
4695 sym = local_syms + r_symndx;
4696 sec = local_sections[r_symndx];
4697 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
4698
4699 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4700 }
4701 else
4702 {
4703 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4704 r_symndx, symtab_hdr, sym_hashes,
4705 h, sec, relocation,
4706 unresolved_reloc, warned);
4707
4708 sym_name = h->root.root.string;
4709 }
4710
4711 /* TLS optimizations. Replace instruction sequences and relocs
4712 based on information we collected in tls_optimize. We edit
4713 RELOCS so that --emit-relocs will output something sensible
4714 for the final instruction stream. */
4715 tls_mask = 0;
4716 tls_gd = 0;
4717 if (IS_PPC_TLS_RELOC (r_type))
4718 {
4719 if (h != NULL)
4720 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
4721 else if (local_got_offsets != NULL)
4722 {
4723 char *lgot_masks;
4724 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
4725 tls_mask = lgot_masks[r_symndx];
4726 }
4727 }
4728
4729 /* Ensure reloc mapping code below stays sane. */
4730 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
4731 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
4732 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
4733 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
4734 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
4735 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
4736 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
4737 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
4738 abort ();
4739 switch (r_type)
4740 {
4741 default:
4742 break;
4743
4744 case R_PPC_GOT_TPREL16:
4745 case R_PPC_GOT_TPREL16_LO:
4746 if (tls_mask != 0
4747 && (tls_mask & TLS_TPREL) == 0)
4748 {
4749 bfd_vma insn;
4750 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
4751 insn &= 31 << 21;
4752 insn |= 0x3c020000; /* addis 0,2,0 */
4753 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
4754 r_type = R_PPC_TPREL16_HA;
4755 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4756 }
4757 break;
4758
4759 case R_PPC_TLS:
4760 if (tls_mask != 0
4761 && (tls_mask & TLS_TPREL) == 0)
4762 {
4763 bfd_vma insn, rtra;
4764 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4765 if ((insn & ((31 << 26) | (31 << 11)))
4766 == ((31 << 26) | (2 << 11)))
4767 rtra = insn & ((1 << 26) - (1 << 16));
4768 else if ((insn & ((31 << 26) | (31 << 16)))
4769 == ((31 << 26) | (2 << 16)))
4770 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
4771 else
4772 abort ();
4773 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
4774 /* add -> addi. */
4775 insn = 14 << 26;
4776 else if ((insn & (31 << 1)) == 23 << 1
4777 && ((insn & (31 << 6)) < 14 << 6
4778 || ((insn & (31 << 6)) >= 16 << 6
4779 && (insn & (31 << 6)) < 24 << 6)))
4780 /* load and store indexed -> dform. */
4781 insn = (32 | ((insn >> 6) & 31)) << 26;
4782 else if ((insn & (31 << 1)) == 21 << 1
4783 && (insn & (0x1a << 6)) == 0)
4784 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
4785 insn = (((58 | ((insn >> 6) & 4)) << 26)
4786 | ((insn >> 6) & 1));
4787 else if ((insn & (31 << 1)) == 21 << 1
4788 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
4789 /* lwax -> lwa. */
4790 insn = (58 << 26) | 2;
4791 else
4792 abort ();
4793 insn |= rtra;
4794 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4795 r_type = R_PPC_TPREL16_LO;
4796 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4797 /* Was PPC_TLS which sits on insn boundary, now
4798 PPC_TPREL16_LO which is at insn+2. */
4799 rel->r_offset += 2;
4800 }
4801 break;
4802
4803 case R_PPC_GOT_TLSGD16_HI:
4804 case R_PPC_GOT_TLSGD16_HA:
4805 tls_gd = TLS_TPRELGD;
4806 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4807 goto tls_gdld_hi;
4808 break;
4809
4810 case R_PPC_GOT_TLSLD16_HI:
4811 case R_PPC_GOT_TLSLD16_HA:
4812 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4813 {
4814 tls_gdld_hi:
4815 if ((tls_mask & tls_gd) != 0)
4816 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4817 + R_PPC_GOT_TPREL16);
4818 else
4819 {
4820 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
4821 rel->r_offset -= 2;
4822 r_type = R_PPC_NONE;
4823 }
4824 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4825 }
4826 break;
4827
4828 case R_PPC_GOT_TLSGD16:
4829 case R_PPC_GOT_TLSGD16_LO:
4830 tls_gd = TLS_TPRELGD;
4831 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4832 goto tls_get_addr_check;
4833 break;
4834
4835 case R_PPC_GOT_TLSLD16:
4836 case R_PPC_GOT_TLSLD16_LO:
4837 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4838 {
4839 tls_get_addr_check:
4840 if (rel + 1 < relend)
4841 {
4842 enum elf_ppc_reloc_type r_type2;
4843 unsigned long r_symndx2;
4844 struct elf_link_hash_entry *h2;
4845 bfd_vma insn1, insn2;
4846 bfd_vma offset;
4847
4848 /* The next instruction should be a call to
4849 __tls_get_addr. Peek at the reloc to be sure. */
4850 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4851 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4852 if (r_symndx2 < symtab_hdr->sh_info
4853 || (r_type2 != R_PPC_REL14
4854 && r_type2 != R_PPC_REL14_BRTAKEN
4855 && r_type2 != R_PPC_REL14_BRNTAKEN
4856 && r_type2 != R_PPC_REL24
4857 && r_type2 != R_PPC_PLTREL24))
4858 break;
4859
4860 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4861 while (h2->root.type == bfd_link_hash_indirect
4862 || h2->root.type == bfd_link_hash_warning)
4863 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
4864 if (h2 == NULL || h2 != htab->tls_get_addr)
4865 break;
4866
4867 /* OK, it checks out. Replace the call. */
4868 offset = rel[1].r_offset;
4869 insn1 = bfd_get_32 (output_bfd,
4870 contents + rel->r_offset - 2);
4871 if ((tls_mask & tls_gd) != 0)
4872 {
4873 /* IE */
4874 insn1 &= (1 << 26) - 1;
4875 insn1 |= 32 << 26; /* lwz */
4876 insn2 = 0x7c631214; /* add 3,3,2 */
4877 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
4878 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4879 + R_PPC_GOT_TPREL16);
4880 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4881 }
4882 else
4883 {
4884 /* LE */
4885 insn1 = 0x3c620000; /* addis 3,2,0 */
4886 insn2 = 0x38630000; /* addi 3,3,0 */
4887 if (tls_gd == 0)
4888 {
4889 /* Was an LD reloc. */
4890 r_symndx = 0;
4891 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4892 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4893 }
4894 r_type = R_PPC_TPREL16_HA;
4895 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4896 rel[1].r_info = ELF32_R_INFO (r_symndx,
4897 R_PPC_TPREL16_LO);
4898 rel[1].r_offset += 2;
4899 }
4900 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
4901 bfd_put_32 (output_bfd, insn2, contents + offset);
4902 if (tls_gd == 0)
4903 {
4904 /* We changed the symbol on an LD reloc. Start over
4905 in order to get h, sym, sec etc. right. */
4906 rel--;
4907 continue;
4908 }
4909 }
4910 }
4911 break;
4912 }
4913
4914 /* Handle other relocations that tweak non-addend part of insn. */
4915 branch_bit = 0;
4916 switch (r_type)
4917 {
4918 default:
4919 break;
4920
4921 /* Branch taken prediction relocations. */
4922 case R_PPC_ADDR14_BRTAKEN:
4923 case R_PPC_REL14_BRTAKEN:
4924 branch_bit = BRANCH_PREDICT_BIT;
4925 /* Fall thru */
4926
4927 /* Branch not taken prediction relocations. */
4928 case R_PPC_ADDR14_BRNTAKEN:
4929 case R_PPC_REL14_BRNTAKEN:
4930 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4931 insn &= ~BRANCH_PREDICT_BIT;
4932 insn |= branch_bit;
4933
4934 from = (rel->r_offset
4935 + input_section->output_offset
4936 + input_section->output_section->vma);
4937
4938 /* Invert 'y' bit if not the default. */
4939 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
4940 insn ^= BRANCH_PREDICT_BIT;
4941
4942 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4943 break;
4944 }
4945
4946 addend = rel->r_addend;
4947 tls_type = 0;
4948 howto = NULL;
4949 if (r_type < R_PPC_max)
4950 howto = ppc_elf_howto_table[r_type];
4951 switch (r_type)
4952 {
4953 default:
4954 (*_bfd_error_handler)
4955 (_("%B: unknown relocation type %d for symbol %s"),
4956 input_bfd, (int) r_type, sym_name);
4957
4958 bfd_set_error (bfd_error_bad_value);
4959 ret = FALSE;
4960 continue;
4961
4962 case R_PPC_NONE:
4963 case R_PPC_TLS:
4964 case R_PPC_EMB_MRKREF:
4965 case R_PPC_GNU_VTINHERIT:
4966 case R_PPC_GNU_VTENTRY:
4967 continue;
4968
4969 /* GOT16 relocations. Like an ADDR16 using the symbol's
4970 address in the GOT as relocation value instead of the
4971 symbol's value itself. Also, create a GOT entry for the
4972 symbol and put the symbol value there. */
4973 case R_PPC_GOT_TLSGD16:
4974 case R_PPC_GOT_TLSGD16_LO:
4975 case R_PPC_GOT_TLSGD16_HI:
4976 case R_PPC_GOT_TLSGD16_HA:
4977 tls_type = TLS_TLS | TLS_GD;
4978 goto dogot;
4979
4980 case R_PPC_GOT_TLSLD16:
4981 case R_PPC_GOT_TLSLD16_LO:
4982 case R_PPC_GOT_TLSLD16_HI:
4983 case R_PPC_GOT_TLSLD16_HA:
4984 tls_type = TLS_TLS | TLS_LD;
4985 goto dogot;
4986
4987 case R_PPC_GOT_TPREL16:
4988 case R_PPC_GOT_TPREL16_LO:
4989 case R_PPC_GOT_TPREL16_HI:
4990 case R_PPC_GOT_TPREL16_HA:
4991 tls_type = TLS_TLS | TLS_TPREL;
4992 goto dogot;
4993
4994 case R_PPC_GOT_DTPREL16:
4995 case R_PPC_GOT_DTPREL16_LO:
4996 case R_PPC_GOT_DTPREL16_HI:
4997 case R_PPC_GOT_DTPREL16_HA:
4998 tls_type = TLS_TLS | TLS_DTPREL;
4999 goto dogot;
5000
5001 case R_PPC_GOT16:
5002 case R_PPC_GOT16_LO:
5003 case R_PPC_GOT16_HI:
5004 case R_PPC_GOT16_HA:
5005 dogot:
5006 {
5007 /* Relocation is to the entry for this symbol in the global
5008 offset table. */
5009 bfd_vma off;
5010 bfd_vma *offp;
5011 unsigned long indx;
5012
5013 if (htab->got == NULL)
5014 abort ();
5015
5016 indx = 0;
5017 if (tls_type == (TLS_TLS | TLS_LD)
5018 && (h == NULL
5019 || !h->def_dynamic))
5020 offp = &htab->tlsld_got.offset;
5021 else if (h != NULL)
5022 {
5023 bfd_boolean dyn;
5024 dyn = htab->elf.dynamic_sections_created;
5025 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5026 || (info->shared
5027 && SYMBOL_REFERENCES_LOCAL (info, h)))
5028 /* This is actually a static link, or it is a
5029 -Bsymbolic link and the symbol is defined
5030 locally, or the symbol was forced to be local
5031 because of a version file. */
5032 ;
5033 else
5034 {
5035 indx = h->dynindx;
5036 unresolved_reloc = FALSE;
5037 }
5038 offp = &h->got.offset;
5039 }
5040 else
5041 {
5042 if (local_got_offsets == NULL)
5043 abort ();
5044 offp = &local_got_offsets[r_symndx];
5045 }
5046
5047 /* The offset must always be a multiple of 4. We use the
5048 least significant bit to record whether we have already
5049 processed this entry. */
5050 off = *offp;
5051 if ((off & 1) != 0)
5052 off &= ~1;
5053 else
5054 {
5055 unsigned int tls_m = (tls_mask
5056 & (TLS_LD | TLS_GD | TLS_DTPREL
5057 | TLS_TPREL | TLS_TPRELGD));
5058
5059 if (offp == &htab->tlsld_got.offset)
5060 tls_m = TLS_LD;
5061 else if (h == NULL
5062 || !h->def_dynamic)
5063 tls_m &= ~TLS_LD;
5064
5065 /* We might have multiple got entries for this sym.
5066 Initialize them all. */
5067 do
5068 {
5069 int tls_ty = 0;
5070
5071 if ((tls_m & TLS_LD) != 0)
5072 {
5073 tls_ty = TLS_TLS | TLS_LD;
5074 tls_m &= ~TLS_LD;
5075 }
5076 else if ((tls_m & TLS_GD) != 0)
5077 {
5078 tls_ty = TLS_TLS | TLS_GD;
5079 tls_m &= ~TLS_GD;
5080 }
5081 else if ((tls_m & TLS_DTPREL) != 0)
5082 {
5083 tls_ty = TLS_TLS | TLS_DTPREL;
5084 tls_m &= ~TLS_DTPREL;
5085 }
5086 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5087 {
5088 tls_ty = TLS_TLS | TLS_TPREL;
5089 tls_m = 0;
5090 }
5091
5092 /* Generate relocs for the dynamic linker. */
5093 if ((info->shared || indx != 0)
5094 && (h == NULL
5095 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5096 || h->root.type != bfd_link_hash_undefweak))
5097 {
5098 outrel.r_offset = (htab->got->output_section->vma
5099 + htab->got->output_offset
5100 + off);
5101 outrel.r_addend = 0;
5102 if (tls_ty & (TLS_LD | TLS_GD))
5103 {
5104 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5105 if (tls_ty == (TLS_TLS | TLS_GD))
5106 {
5107 loc = htab->relgot->contents;
5108 loc += (htab->relgot->reloc_count++
5109 * sizeof (Elf32_External_Rela));
5110 bfd_elf32_swap_reloca_out (output_bfd,
5111 &outrel, loc);
5112 outrel.r_offset += 4;
5113 outrel.r_info
5114 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5115 }
5116 }
5117 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5118 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5119 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5120 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5121 else if (indx == 0)
5122 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5123 else
5124 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5125 if (indx == 0)
5126 {
5127 outrel.r_addend += relocation;
5128 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5129 outrel.r_addend -= htab->elf.tls_sec->vma;
5130 }
5131 loc = htab->relgot->contents;
5132 loc += (htab->relgot->reloc_count++
5133 * sizeof (Elf32_External_Rela));
5134 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5135 }
5136
5137 /* Init the .got section contents if we're not
5138 emitting a reloc. */
5139 else
5140 {
5141 bfd_vma value = relocation;
5142
5143 if (tls_ty == (TLS_TLS | TLS_LD))
5144 value = 1;
5145 else if (tls_ty != 0)
5146 {
5147 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
5148 if (tls_ty == (TLS_TLS | TLS_TPREL))
5149 value += DTP_OFFSET - TP_OFFSET;
5150
5151 if (tls_ty == (TLS_TLS | TLS_GD))
5152 {
5153 bfd_put_32 (output_bfd, value,
5154 htab->got->contents + off + 4);
5155 value = 1;
5156 }
5157 }
5158 bfd_put_32 (output_bfd, value,
5159 htab->got->contents + off);
5160 }
5161
5162 off += 4;
5163 if (tls_ty & (TLS_LD | TLS_GD))
5164 off += 4;
5165 }
5166 while (tls_m != 0);
5167
5168 off = *offp;
5169 *offp = off | 1;
5170 }
5171
5172 if (off >= (bfd_vma) -2)
5173 abort ();
5174
5175 if ((tls_type & TLS_TLS) != 0)
5176 {
5177 if (tls_type != (TLS_TLS | TLS_LD))
5178 {
5179 if ((tls_mask & TLS_LD) != 0
5180 && !(h == NULL
5181 || !h->def_dynamic))
5182 off += 8;
5183 if (tls_type != (TLS_TLS | TLS_GD))
5184 {
5185 if ((tls_mask & TLS_GD) != 0)
5186 off += 8;
5187 if (tls_type != (TLS_TLS | TLS_DTPREL))
5188 {
5189 if ((tls_mask & TLS_DTPREL) != 0)
5190 off += 4;
5191 }
5192 }
5193 }
5194 }
5195
5196 relocation = htab->got->output_offset + off - 4;
5197
5198 /* Addends on got relocations don't make much sense.
5199 x+off@got is actually x@got+off, and since the got is
5200 generated by a hash table traversal, the value in the
5201 got at entry m+n bears little relation to the entry m. */
5202 if (addend != 0)
5203 (*_bfd_error_handler)
5204 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
5205 input_bfd,
5206 input_section,
5207 (long) rel->r_offset,
5208 howto->name,
5209 sym_name);
5210 }
5211 break;
5212
5213 /* Relocations that need no special processing. */
5214 case R_PPC_LOCAL24PC:
5215 /* It makes no sense to point a local relocation
5216 at a symbol not in this object. */
5217 if (unresolved_reloc)
5218 {
5219 if (! (*info->callbacks->undefined_symbol) (info,
5220 h->root.root.string,
5221 input_bfd,
5222 input_section,
5223 rel->r_offset,
5224 TRUE))
5225 return FALSE;
5226 continue;
5227 }
5228 break;
5229
5230 case R_PPC_DTPREL16:
5231 case R_PPC_DTPREL16_LO:
5232 case R_PPC_DTPREL16_HI:
5233 case R_PPC_DTPREL16_HA:
5234 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5235 break;
5236
5237 /* Relocations that may need to be propagated if this is a shared
5238 object. */
5239 case R_PPC_TPREL16:
5240 case R_PPC_TPREL16_LO:
5241 case R_PPC_TPREL16_HI:
5242 case R_PPC_TPREL16_HA:
5243 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5244 /* The TPREL16 relocs shouldn't really be used in shared
5245 libs as they will result in DT_TEXTREL being set, but
5246 support them anyway. */
5247 goto dodyn;
5248
5249 case R_PPC_TPREL32:
5250 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5251 goto dodyn;
5252
5253 case R_PPC_DTPREL32:
5254 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5255 goto dodyn;
5256
5257 case R_PPC_DTPMOD32:
5258 relocation = 1;
5259 addend = 0;
5260 goto dodyn;
5261
5262 case R_PPC_REL24:
5263 case R_PPC_REL32:
5264 case R_PPC_REL14:
5265 case R_PPC_REL14_BRTAKEN:
5266 case R_PPC_REL14_BRNTAKEN:
5267 /* If these relocations are not to a named symbol, they can be
5268 handled right here, no need to bother the dynamic linker. */
5269 if (SYMBOL_REFERENCES_LOCAL (info, h)
5270 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5271 break;
5272 /* fall through */
5273
5274 /* Relocations that always need to be propagated if this is a shared
5275 object. */
5276 case R_PPC_ADDR32:
5277 case R_PPC_ADDR24:
5278 case R_PPC_ADDR16:
5279 case R_PPC_ADDR16_LO:
5280 case R_PPC_ADDR16_HI:
5281 case R_PPC_ADDR16_HA:
5282 case R_PPC_ADDR14:
5283 case R_PPC_ADDR14_BRTAKEN:
5284 case R_PPC_ADDR14_BRNTAKEN:
5285 case R_PPC_UADDR32:
5286 case R_PPC_UADDR16:
5287 /* r_symndx will be zero only for relocs against symbols
5288 from removed linkonce sections, or sections discarded by
5289 a linker script. */
5290 dodyn:
5291 if (r_symndx == 0)
5292 break;
5293 /* Fall thru. */
5294
5295 if ((info->shared
5296 && (h == NULL
5297 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5298 || h->root.type != bfd_link_hash_undefweak)
5299 && (MUST_BE_DYN_RELOC (r_type)
5300 || !SYMBOL_CALLS_LOCAL (info, h)))
5301 || (ELIMINATE_COPY_RELOCS
5302 && !info->shared
5303 && (input_section->flags & SEC_ALLOC) != 0
5304 && h != NULL
5305 && h->dynindx != -1
5306 && !h->non_got_ref
5307 && h->def_dynamic
5308 && !h->def_regular))
5309 {
5310 int skip;
5311
5312 #ifdef DEBUG
5313 fprintf (stderr, "ppc_elf_relocate_section needs to "
5314 "create relocation for %s\n",
5315 (h && h->root.root.string
5316 ? h->root.root.string : "<unknown>"));
5317 #endif
5318
5319 /* When generating a shared object, these relocations
5320 are copied into the output file to be resolved at run
5321 time. */
5322 if (sreloc == NULL)
5323 {
5324 const char *name;
5325
5326 name = (bfd_elf_string_from_elf_section
5327 (input_bfd,
5328 elf_elfheader (input_bfd)->e_shstrndx,
5329 elf_section_data (input_section)->rel_hdr.sh_name));
5330 if (name == NULL)
5331 return FALSE;
5332
5333 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
5334 && strcmp (bfd_get_section_name (input_bfd,
5335 input_section),
5336 name + 5) == 0);
5337
5338 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
5339 BFD_ASSERT (sreloc != NULL);
5340 }
5341
5342 skip = 0;
5343
5344 outrel.r_offset =
5345 _bfd_elf_section_offset (output_bfd, info, input_section,
5346 rel->r_offset);
5347 if (outrel.r_offset == (bfd_vma) -1
5348 || outrel.r_offset == (bfd_vma) -2)
5349 skip = (int) outrel.r_offset;
5350 outrel.r_offset += (input_section->output_section->vma
5351 + input_section->output_offset);
5352
5353 if (skip)
5354 memset (&outrel, 0, sizeof outrel);
5355 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
5356 {
5357 unresolved_reloc = FALSE;
5358 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5359 outrel.r_addend = rel->r_addend;
5360 }
5361 else
5362 {
5363 outrel.r_addend = relocation + rel->r_addend;
5364
5365 if (r_type == R_PPC_ADDR32)
5366 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
5367 else
5368 {
5369 long indx;
5370
5371 if (bfd_is_abs_section (sec))
5372 indx = 0;
5373 else if (sec == NULL || sec->owner == NULL)
5374 {
5375 bfd_set_error (bfd_error_bad_value);
5376 return FALSE;
5377 }
5378 else
5379 {
5380 asection *osec;
5381
5382 /* We are turning this relocation into one
5383 against a section symbol. It would be
5384 proper to subtract the symbol's value,
5385 osec->vma, from the emitted reloc addend,
5386 but ld.so expects buggy relocs. */
5387 osec = sec->output_section;
5388 indx = elf_section_data (osec)->dynindx;
5389 BFD_ASSERT (indx > 0);
5390 #ifdef DEBUG
5391 if (indx <= 0)
5392 printf ("indx=%d section=%s flags=%08x name=%s\n",
5393 indx, osec->name, osec->flags,
5394 h->root.root.string);
5395 #endif
5396 }
5397
5398 outrel.r_info = ELF32_R_INFO (indx, r_type);
5399 }
5400 }
5401
5402 loc = sreloc->contents;
5403 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5404 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5405
5406 if (skip == -1)
5407 continue;
5408
5409 /* This reloc will be computed at runtime. We clear the memory
5410 so that it contains predictable value. */
5411 if (! skip
5412 && ((input_section->flags & SEC_ALLOC) != 0
5413 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
5414 {
5415 relocation = howto->pc_relative ? outrel.r_offset : 0;
5416 addend = 0;
5417 break;
5418 }
5419 }
5420 break;
5421
5422 case R_PPC_RELAX32PC:
5423 relocation -= (input_section->output_section->vma
5424 + input_section->output_offset
5425 + rel->r_offset - 4);
5426 /* Fall thru */
5427 case R_PPC_RELAX32:
5428 {
5429 unsigned long t0;
5430 unsigned long t1;
5431
5432 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
5433 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
5434
5435 /* We're clearing the bits for R_PPC_ADDR16_HA
5436 and R_PPC_ADDR16_LO here. */
5437 t0 &= ~0xffff;
5438 t1 &= ~0xffff;
5439
5440 /* t0 is HA, t1 is LO */
5441 relocation += addend;
5442 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
5443 t1 |= relocation & 0xffff;
5444
5445 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
5446 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
5447 }
5448 continue;
5449
5450 /* Indirect .sdata relocation. */
5451 case R_PPC_EMB_SDAI16:
5452 BFD_ASSERT (htab->sdata != NULL);
5453 relocation
5454 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5455 htab->sdata, h, relocation,
5456 rel, R_PPC_RELATIVE);
5457 break;
5458
5459 /* Indirect .sdata2 relocation. */
5460 case R_PPC_EMB_SDA2I16:
5461 BFD_ASSERT (htab->sdata2 != NULL);
5462 relocation
5463 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5464 htab->sdata2, h, relocation,
5465 rel, R_PPC_RELATIVE);
5466 break;
5467
5468 /* Handle the TOC16 reloc. We want to use the offset within the .got
5469 section, not the actual VMA. This is appropriate when generating
5470 an embedded ELF object, for which the .got section acts like the
5471 AIX .toc section. */
5472 case R_PPC_TOC16: /* phony GOT16 relocations */
5473 BFD_ASSERT (sec != NULL);
5474 BFD_ASSERT (bfd_is_und_section (sec)
5475 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
5476 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
5477
5478 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
5479 break;
5480
5481 case R_PPC_PLTREL24:
5482 /* Relocation is to the entry for this symbol in the
5483 procedure linkage table. */
5484 BFD_ASSERT (h != NULL);
5485
5486 if (h->plt.offset == (bfd_vma) -1
5487 || htab->plt == NULL)
5488 {
5489 /* We didn't make a PLT entry for this symbol. This
5490 happens when statically linking PIC code, or when
5491 using -Bsymbolic. */
5492 break;
5493 }
5494
5495 unresolved_reloc = FALSE;
5496 relocation = (htab->plt->output_section->vma
5497 + htab->plt->output_offset
5498 + h->plt.offset);
5499 break;
5500
5501 /* Relocate against _SDA_BASE_. */
5502 case R_PPC_SDAREL16:
5503 {
5504 const char *name;
5505 const struct elf_link_hash_entry *sh;
5506
5507 BFD_ASSERT (sec != NULL);
5508 name = bfd_get_section_name (abfd, sec->output_section);
5509 if (! ((strncmp (name, ".sdata", 6) == 0
5510 && (name[6] == 0 || name[6] == '.'))
5511 || (strncmp (name, ".sbss", 5) == 0
5512 && (name[5] == 0 || name[5] == '.'))))
5513 {
5514 (*_bfd_error_handler)
5515 (_("%B: the target (%s) of a %s relocation is "
5516 "in the wrong output section (%s)"),
5517 input_bfd,
5518 sym_name,
5519 howto->name,
5520 name);
5521 }
5522 sh = htab->sdata->sym_hash;
5523 addend -= (sh->root.u.def.value
5524 + sh->root.u.def.section->output_section->vma
5525 + sh->root.u.def.section->output_offset);
5526 }
5527 break;
5528
5529 /* Relocate against _SDA2_BASE_. */
5530 case R_PPC_EMB_SDA2REL:
5531 {
5532 const char *name;
5533 const struct elf_link_hash_entry *sh;
5534
5535 BFD_ASSERT (sec != NULL);
5536 name = bfd_get_section_name (abfd, sec->output_section);
5537 if (! (strncmp (name, ".sdata2", 7) == 0
5538 || strncmp (name, ".sbss2", 6) == 0))
5539 {
5540 (*_bfd_error_handler)
5541 (_("%B: the target (%s) of a %s relocation is "
5542 "in the wrong output section (%s)"),
5543 input_bfd,
5544 sym_name,
5545 howto->name,
5546 name);
5547
5548 bfd_set_error (bfd_error_bad_value);
5549 ret = FALSE;
5550 continue;
5551 }
5552 sh = htab->sdata2->sym_hash;
5553 addend -= (sh->root.u.def.value
5554 + sh->root.u.def.section->output_section->vma
5555 + sh->root.u.def.section->output_offset);
5556 }
5557 break;
5558
5559 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
5560 case R_PPC_EMB_SDA21:
5561 case R_PPC_EMB_RELSDA:
5562 {
5563 const char *name;
5564 const struct elf_link_hash_entry *sh;
5565 int reg;
5566
5567 BFD_ASSERT (sec != NULL);
5568 name = bfd_get_section_name (abfd, sec->output_section);
5569 if (((strncmp (name, ".sdata", 6) == 0
5570 && (name[6] == 0 || name[6] == '.'))
5571 || (strncmp (name, ".sbss", 5) == 0
5572 && (name[5] == 0 || name[5] == '.'))))
5573 {
5574 reg = 13;
5575 sh = htab->sdata->sym_hash;
5576 addend -= (sh->root.u.def.value
5577 + sh->root.u.def.section->output_section->vma
5578 + sh->root.u.def.section->output_offset);
5579 }
5580
5581 else if (strncmp (name, ".sdata2", 7) == 0
5582 || strncmp (name, ".sbss2", 6) == 0)
5583 {
5584 reg = 2;
5585 sh = htab->sdata2->sym_hash;
5586 addend -= (sh->root.u.def.value
5587 + sh->root.u.def.section->output_section->vma
5588 + sh->root.u.def.section->output_offset);
5589 }
5590
5591 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
5592 || strcmp (name, ".PPC.EMB.sbss0") == 0)
5593 {
5594 reg = 0;
5595 }
5596
5597 else
5598 {
5599 (*_bfd_error_handler)
5600 (_("%B: the target (%s) of a %s relocation is "
5601 "in the wrong output section (%s)"),
5602 input_bfd,
5603 sym_name,
5604 howto->name,
5605 name);
5606
5607 bfd_set_error (bfd_error_bad_value);
5608 ret = FALSE;
5609 continue;
5610 }
5611
5612 if (r_type == R_PPC_EMB_SDA21)
5613 { /* fill in register field */
5614 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5615 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
5616 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5617 }
5618 }
5619 break;
5620
5621 /* Relocate against the beginning of the section. */
5622 case R_PPC_SECTOFF:
5623 case R_PPC_SECTOFF_LO:
5624 case R_PPC_SECTOFF_HI:
5625 case R_PPC_SECTOFF_HA:
5626 BFD_ASSERT (sec != NULL);
5627 addend -= sec->output_section->vma;
5628 break;
5629
5630 /* Negative relocations. */
5631 case R_PPC_EMB_NADDR32:
5632 case R_PPC_EMB_NADDR16:
5633 case R_PPC_EMB_NADDR16_LO:
5634 case R_PPC_EMB_NADDR16_HI:
5635 case R_PPC_EMB_NADDR16_HA:
5636 addend -= 2 * relocation;
5637 break;
5638
5639 case R_PPC_COPY:
5640 case R_PPC_GLOB_DAT:
5641 case R_PPC_JMP_SLOT:
5642 case R_PPC_RELATIVE:
5643 case R_PPC_PLT32:
5644 case R_PPC_PLTREL32:
5645 case R_PPC_PLT16_LO:
5646 case R_PPC_PLT16_HI:
5647 case R_PPC_PLT16_HA:
5648 case R_PPC_ADDR30:
5649 case R_PPC_EMB_RELSEC16:
5650 case R_PPC_EMB_RELST_LO:
5651 case R_PPC_EMB_RELST_HI:
5652 case R_PPC_EMB_RELST_HA:
5653 case R_PPC_EMB_BIT_FLD:
5654 (*_bfd_error_handler)
5655 (_("%B: relocation %s is not yet supported for symbol %s."),
5656 input_bfd,
5657 howto->name,
5658 sym_name);
5659
5660 bfd_set_error (bfd_error_invalid_operation);
5661 ret = FALSE;
5662 continue;
5663 }
5664
5665 /* Do any further special processing. */
5666 switch (r_type)
5667 {
5668 default:
5669 break;
5670
5671 case R_PPC_ADDR16_HA:
5672 case R_PPC_GOT16_HA:
5673 case R_PPC_PLT16_HA:
5674 case R_PPC_SECTOFF_HA:
5675 case R_PPC_TPREL16_HA:
5676 case R_PPC_DTPREL16_HA:
5677 case R_PPC_GOT_TLSGD16_HA:
5678 case R_PPC_GOT_TLSLD16_HA:
5679 case R_PPC_GOT_TPREL16_HA:
5680 case R_PPC_GOT_DTPREL16_HA:
5681 case R_PPC_EMB_NADDR16_HA:
5682 case R_PPC_EMB_RELST_HA:
5683 /* It's just possible that this symbol is a weak symbol
5684 that's not actually defined anywhere. In that case,
5685 'sec' would be NULL, and we should leave the symbol
5686 alone (it will be set to zero elsewhere in the link). */
5687 if (sec != NULL)
5688 /* Add 0x10000 if sign bit in 0:15 is set.
5689 Bits 0:15 are not used. */
5690 addend += 0x8000;
5691 break;
5692 }
5693
5694 #ifdef DEBUG
5695 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
5696 "offset = %ld, addend = %ld\n",
5697 howto->name,
5698 (int) r_type,
5699 sym_name,
5700 r_symndx,
5701 (long) rel->r_offset,
5702 (long) addend);
5703 #endif
5704
5705 if (unresolved_reloc
5706 && !((input_section->flags & SEC_DEBUGGING) != 0
5707 && h->def_dynamic))
5708 {
5709 (*_bfd_error_handler)
5710 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5711 input_bfd,
5712 input_section,
5713 (long) rel->r_offset,
5714 howto->name,
5715 sym_name);
5716 ret = FALSE;
5717 }
5718
5719 r = _bfd_final_link_relocate (howto,
5720 input_bfd,
5721 input_section,
5722 contents,
5723 rel->r_offset,
5724 relocation,
5725 addend);
5726
5727 if (r != bfd_reloc_ok)
5728 {
5729 if (sym_name == NULL)
5730 sym_name = "(null)";
5731 if (r == bfd_reloc_overflow)
5732 {
5733 if (warned)
5734 continue;
5735 if (h != NULL
5736 && h->root.type == bfd_link_hash_undefweak
5737 && howto->pc_relative)
5738 {
5739 /* Assume this is a call protected by other code that
5740 detect the symbol is undefined. If this is the case,
5741 we can safely ignore the overflow. If not, the
5742 program is hosed anyway, and a little warning isn't
5743 going to help. */
5744
5745 continue;
5746 }
5747
5748 if (! (*info->callbacks->reloc_overflow) (info,
5749 (h ? &h->root : NULL),
5750 sym_name,
5751 howto->name,
5752 rel->r_addend,
5753 input_bfd,
5754 input_section,
5755 rel->r_offset))
5756 return FALSE;
5757 }
5758 else
5759 {
5760 (*_bfd_error_handler)
5761 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
5762 input_bfd, input_section,
5763 (long) rel->r_offset, howto->name, sym_name, (int) r);
5764 ret = FALSE;
5765 }
5766 }
5767 }
5768
5769 #ifdef DEBUG
5770 fprintf (stderr, "\n");
5771 #endif
5772
5773 return ret;
5774 }
5775
5776 static enum elf_reloc_type_class
5777 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
5778 {
5779 switch (ELF32_R_TYPE (rela->r_info))
5780 {
5781 case R_PPC_RELATIVE:
5782 return reloc_class_relative;
5783 case R_PPC_REL24:
5784 case R_PPC_ADDR24:
5785 case R_PPC_JMP_SLOT:
5786 return reloc_class_plt;
5787 case R_PPC_COPY:
5788 return reloc_class_copy;
5789 default:
5790 return reloc_class_normal;
5791 }
5792 }
5793 \f
5794 /* Support for core dump NOTE sections. */
5795
5796 static bfd_boolean
5797 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
5798 {
5799 int offset;
5800 unsigned int size;
5801
5802 switch (note->descsz)
5803 {
5804 default:
5805 return FALSE;
5806
5807 case 268: /* Linux/PPC. */
5808 /* pr_cursig */
5809 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
5810
5811 /* pr_pid */
5812 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
5813
5814 /* pr_reg */
5815 offset = 72;
5816 size = 192;
5817
5818 break;
5819 }
5820
5821 /* Make a ".reg/999" section. */
5822 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
5823 size, note->descpos + offset);
5824 }
5825
5826 static bfd_boolean
5827 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
5828 {
5829 switch (note->descsz)
5830 {
5831 default:
5832 return FALSE;
5833
5834 case 128: /* Linux/PPC elf_prpsinfo. */
5835 elf_tdata (abfd)->core_program
5836 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
5837 elf_tdata (abfd)->core_command
5838 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
5839 }
5840
5841 /* Note that for some reason, a spurious space is tacked
5842 onto the end of the args in some (at least one anyway)
5843 implementations, so strip it off if it exists. */
5844
5845 {
5846 char *command = elf_tdata (abfd)->core_command;
5847 int n = strlen (command);
5848
5849 if (0 < n && command[n - 1] == ' ')
5850 command[n - 1] = '\0';
5851 }
5852
5853 return TRUE;
5854 }
5855 \f
5856 /* Very simple linked list structure for recording apuinfo values. */
5857 typedef struct apuinfo_list
5858 {
5859 struct apuinfo_list *next;
5860 unsigned long value;
5861 }
5862 apuinfo_list;
5863
5864 static apuinfo_list *head;
5865
5866
5867 static void
5868 apuinfo_list_init (void)
5869 {
5870 head = NULL;
5871 }
5872
5873 static void
5874 apuinfo_list_add (unsigned long value)
5875 {
5876 apuinfo_list *entry = head;
5877
5878 while (entry != NULL)
5879 {
5880 if (entry->value == value)
5881 return;
5882 entry = entry->next;
5883 }
5884
5885 entry = bfd_malloc (sizeof (* entry));
5886 if (entry == NULL)
5887 return;
5888
5889 entry->value = value;
5890 entry->next = head;
5891 head = entry;
5892 }
5893
5894 static unsigned
5895 apuinfo_list_length (void)
5896 {
5897 apuinfo_list *entry;
5898 unsigned long count;
5899
5900 for (entry = head, count = 0;
5901 entry;
5902 entry = entry->next)
5903 ++ count;
5904
5905 return count;
5906 }
5907
5908 static inline unsigned long
5909 apuinfo_list_element (unsigned long number)
5910 {
5911 apuinfo_list * entry;
5912
5913 for (entry = head;
5914 entry && number --;
5915 entry = entry->next)
5916 ;
5917
5918 return entry ? entry->value : 0;
5919 }
5920
5921 static void
5922 apuinfo_list_finish (void)
5923 {
5924 apuinfo_list *entry;
5925
5926 for (entry = head; entry;)
5927 {
5928 apuinfo_list *next = entry->next;
5929 free (entry);
5930 entry = next;
5931 }
5932
5933 head = NULL;
5934 }
5935
5936 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
5937 #define APUINFO_LABEL "APUinfo"
5938
5939 /* Scan the input BFDs and create a linked list of
5940 the APUinfo values that will need to be emitted. */
5941
5942 static void
5943 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
5944 {
5945 bfd *ibfd;
5946 asection *asec;
5947 char *buffer;
5948 unsigned num_input_sections;
5949 bfd_size_type output_section_size;
5950 unsigned i;
5951 unsigned num_entries;
5952 unsigned long offset;
5953 unsigned long length;
5954 const char *error_message = NULL;
5955
5956 if (link_info == NULL)
5957 return;
5958
5959 /* Scan the input bfds, looking for apuinfo sections. */
5960 num_input_sections = 0;
5961 output_section_size = 0;
5962
5963 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5964 {
5965 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
5966 if (asec)
5967 {
5968 ++ num_input_sections;
5969 output_section_size += asec->size;
5970 }
5971 }
5972
5973 /* We need at least one input sections
5974 in order to make merging worthwhile. */
5975 if (num_input_sections < 1)
5976 return;
5977
5978 /* Just make sure that the output section exists as well. */
5979 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
5980 if (asec == NULL)
5981 return;
5982
5983 /* Allocate a buffer for the contents of the input sections. */
5984 buffer = bfd_malloc (output_section_size);
5985 if (buffer == NULL)
5986 return;
5987
5988 offset = 0;
5989 apuinfo_list_init ();
5990
5991 /* Read in the input sections contents. */
5992 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5993 {
5994 unsigned long datum;
5995 char *ptr;
5996
5997 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
5998 if (asec == NULL)
5999 continue;
6000
6001 length = asec->size;
6002 if (length < 24)
6003 {
6004 error_message = _("corrupt or empty %s section in %B");
6005 goto fail;
6006 }
6007
6008 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
6009 || (bfd_bread (buffer + offset, length, ibfd) != length))
6010 {
6011 error_message = _("unable to read in %s section from %B");
6012 goto fail;
6013 }
6014
6015 /* Process the contents of the section. */
6016 ptr = buffer + offset;
6017 error_message = _("corrupt %s section in %B");
6018
6019 /* Verify the contents of the header. Note - we have to
6020 extract the values this way in order to allow for a
6021 host whose endian-ness is different from the target. */
6022 datum = bfd_get_32 (ibfd, ptr);
6023 if (datum != sizeof APUINFO_LABEL)
6024 goto fail;
6025
6026 datum = bfd_get_32 (ibfd, ptr + 8);
6027 if (datum != 0x2)
6028 goto fail;
6029
6030 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
6031 goto fail;
6032
6033 /* Get the number of bytes used for apuinfo entries. */
6034 datum = bfd_get_32 (ibfd, ptr + 4);
6035 if (datum + 20 != length)
6036 goto fail;
6037
6038 /* Make sure that we do not run off the end of the section. */
6039 if (offset + length > output_section_size)
6040 goto fail;
6041
6042 /* Scan the apuinfo section, building a list of apuinfo numbers. */
6043 for (i = 0; i < datum; i += 4)
6044 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
6045
6046 /* Update the offset. */
6047 offset += length;
6048 }
6049
6050 error_message = NULL;
6051
6052 /* Compute the size of the output section. */
6053 num_entries = apuinfo_list_length ();
6054 output_section_size = 20 + num_entries * 4;
6055
6056 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6057
6058 if (! bfd_set_section_size (abfd, asec, output_section_size))
6059 ibfd = abfd,
6060 error_message = _("warning: unable to set size of %s section in %B");
6061
6062 fail:
6063 free (buffer);
6064
6065 if (error_message)
6066 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
6067 }
6068
6069
6070 /* Prevent the output section from accumulating the input sections'
6071 contents. We have already stored this in our linked list structure. */
6072
6073 static bfd_boolean
6074 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
6075 asection *asec,
6076 bfd_byte *contents ATTRIBUTE_UNUSED)
6077 {
6078 return (apuinfo_list_length ()
6079 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
6080 }
6081
6082
6083 /* Finally we can generate the output section. */
6084
6085 static void
6086 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
6087 {
6088 bfd_byte *buffer;
6089 asection *asec;
6090 unsigned i;
6091 unsigned num_entries;
6092 bfd_size_type length;
6093
6094 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6095 if (asec == NULL)
6096 return;
6097
6098 if (apuinfo_list_length () == 0)
6099 return;
6100
6101 length = asec->size;
6102 if (length < 20)
6103 return;
6104
6105 buffer = bfd_malloc (length);
6106 if (buffer == NULL)
6107 {
6108 (*_bfd_error_handler)
6109 (_("failed to allocate space for new APUinfo section."));
6110 return;
6111 }
6112
6113 /* Create the apuinfo header. */
6114 num_entries = apuinfo_list_length ();
6115 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
6116 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
6117 bfd_put_32 (abfd, 0x2, buffer + 8);
6118 strcpy (buffer + 12, APUINFO_LABEL);
6119
6120 length = 20;
6121 for (i = 0; i < num_entries; i++)
6122 {
6123 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
6124 length += 4;
6125 }
6126
6127 if (length != asec->size)
6128 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
6129
6130 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
6131 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
6132
6133 free (buffer);
6134
6135 apuinfo_list_finish ();
6136 }
6137
6138 /* Return address for Ith PLT stub in section PLT, for relocation REL
6139 or (bfd_vma) -1 if it should not be included. */
6140
6141 static bfd_vma
6142 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
6143 const asection *plt ATTRIBUTE_UNUSED,
6144 const arelent *rel)
6145 {
6146 return rel->address;
6147 }
6148
6149 /* Add extra PPC sections -- Note, for now, make .sbss2 and
6150 .PPC.EMB.sbss0 a normal section, and not a bss section so
6151 that the linker doesn't crater when trying to make more than
6152 2 sections. */
6153
6154 static struct bfd_elf_special_section const ppc_elf_special_sections[]=
6155 {
6156 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
6157 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
6158 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
6159 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
6160 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
6161 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
6162 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
6163 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
6164 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
6165 { NULL, 0, 0, 0, 0 }
6166 };
6167 \f
6168 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
6169 #define TARGET_LITTLE_NAME "elf32-powerpcle"
6170 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
6171 #define TARGET_BIG_NAME "elf32-powerpc"
6172 #define ELF_ARCH bfd_arch_powerpc
6173 #define ELF_MACHINE_CODE EM_PPC
6174 #ifdef __QNXTARGET__
6175 #define ELF_MAXPAGESIZE 0x1000
6176 #else
6177 #define ELF_MAXPAGESIZE 0x10000
6178 #endif
6179 #define elf_info_to_howto ppc_elf_info_to_howto
6180
6181 #ifdef EM_CYGNUS_POWERPC
6182 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6183 #endif
6184
6185 #ifdef EM_PPC_OLD
6186 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6187 #endif
6188
6189 #define elf_backend_plt_not_loaded 1
6190 #define elf_backend_got_symbol_offset 4
6191 #define elf_backend_can_gc_sections 1
6192 #define elf_backend_can_refcount 1
6193 #define elf_backend_got_header_size 12
6194 #define elf_backend_rela_normal 1
6195
6196 #define bfd_elf32_mkobject ppc_elf_mkobject
6197 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
6198 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
6199 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
6200 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
6201 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
6202
6203 #define elf_backend_object_p ppc_elf_object_p
6204 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
6205 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
6206 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
6207 #define elf_backend_relocate_section ppc_elf_relocate_section
6208 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
6209 #define elf_backend_check_relocs ppc_elf_check_relocs
6210 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
6211 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
6212 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
6213 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
6214 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
6215 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
6216 #define elf_backend_fake_sections ppc_elf_fake_sections
6217 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
6218 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
6219 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
6220 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
6221 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
6222 #define elf_backend_final_write_processing ppc_elf_final_write_processing
6223 #define elf_backend_write_section ppc_elf_write_section
6224 #define elf_backend_special_sections ppc_elf_special_sections
6225 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
6226
6227 #include "elf32-target.h"
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