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[binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc.h"
34 #include "elf32-ppc.h"
35
36 /* RELA relocations are used here. */
37
38 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc_elf_unhandled_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42
43 /* Branch prediction bit for branch taken relocs. */
44 #define BRANCH_PREDICT_BIT 0x200000
45 /* Mask to set RA in memory instructions. */
46 #define RA_REGISTER_MASK 0x001f0000
47 /* Value to shift register by to insert RA. */
48 #define RA_REGISTER_SHIFT 16
49
50 /* The name of the dynamic interpreter. This is put in the .interp
51 section. */
52 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
53
54 /* The size in bytes of an entry in the procedure linkage table. */
55 #define PLT_ENTRY_SIZE 12
56 /* The initial size of the plt reserved for the dynamic linker. */
57 #define PLT_INITIAL_ENTRY_SIZE 72
58 /* The size of the gap between entries in the PLT. */
59 #define PLT_SLOT_SIZE 8
60 /* The number of single-slot PLT entries (the rest use two slots). */
61 #define PLT_NUM_SINGLE_ENTRIES 8192
62
63 /* Some nop instructions. */
64 #define NOP 0x60000000
65 #define CROR_151515 0x4def7b82
66 #define CROR_313131 0x4ffffb82
67
68 /* Offset of tp and dtp pointers from start of TLS block. */
69 #define TP_OFFSET 0x7000
70 #define DTP_OFFSET 0x8000
71
72 \f
73 /* Enumeration to specify the special section. */
74 enum elf_linker_section_enum
75 {
76 LINKER_SECTION_SDATA,
77 LINKER_SECTION_SDATA2
78 };
79
80 /* Sections created by the linker. */
81
82 typedef struct elf_linker_section
83 {
84 /* pointer to the section */
85 asection *section;
86 /* pointer to the relocations needed for this section */
87 asection *rel_section;
88 /* pointer to the created symbol hash value */
89 struct elf_link_hash_entry *sym_hash;
90 /* offset of symbol from beginning of section */
91 bfd_vma sym_offset;
92 } elf_linker_section_t;
93
94 /* Linked list of allocated pointer entries. This hangs off of the
95 symbol lists, and provides allows us to return different pointers,
96 based on different addend's. */
97
98 typedef struct elf_linker_section_pointers
99 {
100 /* next allocated pointer for this symbol */
101 struct elf_linker_section_pointers *next;
102 /* offset of pointer from beginning of section */
103 bfd_vma offset;
104 /* addend used */
105 bfd_vma addend;
106 /* which linker section this is */
107 elf_linker_section_t *lsect;
108 /* whether address was written yet */
109 bfd_boolean written_address_p;
110 } elf_linker_section_pointers_t;
111
112 struct ppc_elf_obj_tdata
113 {
114 struct elf_obj_tdata elf;
115
116 /* A mapping from local symbols to offsets into the various linker
117 sections added. This is index by the symbol index. */
118 elf_linker_section_pointers_t **linker_section_pointers;
119 };
120
121 #define ppc_elf_tdata(bfd) \
122 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
123
124 #define elf_local_ptr_offsets(bfd) \
125 (ppc_elf_tdata (bfd)->linker_section_pointers)
126
127 /* Override the generic function because we store some extras. */
128
129 static bfd_boolean
130 ppc_elf_mkobject (bfd *abfd)
131 {
132 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
133 abfd->tdata.any = bfd_zalloc (abfd, amt);
134 if (abfd->tdata.any == NULL)
135 return FALSE;
136 return TRUE;
137 }
138
139 /* The PPC linker needs to keep track of the number of relocs that it
140 decides to copy as dynamic relocs in check_relocs for each symbol.
141 This is so that it can later discard them if they are found to be
142 unnecessary. We store the information in a field extending the
143 regular ELF linker hash table. */
144
145 struct ppc_elf_dyn_relocs
146 {
147 struct ppc_elf_dyn_relocs *next;
148
149 /* The input section of the reloc. */
150 asection *sec;
151
152 /* Total number of relocs copied for the input section. */
153 bfd_size_type count;
154
155 /* Number of pc-relative relocs copied for the input section. */
156 bfd_size_type pc_count;
157 };
158
159 /* PPC ELF linker hash entry. */
160
161 struct ppc_elf_link_hash_entry
162 {
163 struct elf_link_hash_entry elf;
164
165 /* If this symbol is used in the linker created sections, the processor
166 specific backend uses this field to map the field into the offset
167 from the beginning of the section. */
168 elf_linker_section_pointers_t *linker_section_pointer;
169
170 /* Track dynamic relocs copied for this symbol. */
171 struct ppc_elf_dyn_relocs *dyn_relocs;
172
173 /* Contexts in which symbol is used in the GOT (or TOC).
174 TLS_GD .. TLS_TLS bits are or'd into the mask as the
175 corresponding relocs are encountered during check_relocs.
176 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
177 indicate the corresponding GOT entry type is not needed. */
178 #define TLS_GD 1 /* GD reloc. */
179 #define TLS_LD 2 /* LD reloc. */
180 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
181 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
182 #define TLS_TLS 16 /* Any TLS reloc. */
183 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
184 char tls_mask;
185 };
186
187 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
188
189 /* PPC ELF linker hash table. */
190
191 struct ppc_elf_link_hash_table
192 {
193 struct elf_link_hash_table elf;
194
195 /* Short-cuts to get to dynamic linker sections. */
196 asection *got;
197 asection *relgot;
198 asection *plt;
199 asection *relplt;
200 asection *dynbss;
201 asection *relbss;
202 asection *dynsbss;
203 asection *relsbss;
204 elf_linker_section_t *sdata;
205 elf_linker_section_t *sdata2;
206 asection *sbss;
207
208 /* Short-cut to first output tls section. */
209 asection *tls_sec;
210
211 /* Shortcut to .__tls_get_addr. */
212 struct elf_link_hash_entry *tls_get_addr;
213
214 /* TLS local dynamic got entry handling. */
215 union {
216 bfd_signed_vma refcount;
217 bfd_vma offset;
218 } tlsld_got;
219
220 /* Small local sym to section mapping cache. */
221 struct sym_sec_cache sym_sec;
222 };
223
224 /* Get the PPC ELF linker hash table from a link_info structure. */
225
226 #define ppc_elf_hash_table(p) \
227 ((struct ppc_elf_link_hash_table *) (p)->hash)
228
229 /* Create an entry in a PPC ELF linker hash table. */
230
231 static struct bfd_hash_entry *
232 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
233 struct bfd_hash_table *table,
234 const char *string)
235 {
236 /* Allocate the structure if it has not already been allocated by a
237 subclass. */
238 if (entry == NULL)
239 {
240 entry = bfd_hash_allocate (table,
241 sizeof (struct ppc_elf_link_hash_entry));
242 if (entry == NULL)
243 return entry;
244 }
245
246 /* Call the allocation method of the superclass. */
247 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
248 if (entry != NULL)
249 {
250 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
251 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
252 ppc_elf_hash_entry (entry)->tls_mask = 0;
253 }
254
255 return entry;
256 }
257
258 /* Create a PPC ELF linker hash table. */
259
260 static struct bfd_link_hash_table *
261 ppc_elf_link_hash_table_create (bfd *abfd)
262 {
263 struct ppc_elf_link_hash_table *ret;
264
265 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
266 if (ret == NULL)
267 return NULL;
268
269 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
270 ppc_elf_link_hash_newfunc))
271 {
272 free (ret);
273 return NULL;
274 }
275
276 return &ret->elf.root;
277 }
278
279 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
280 copying dynamic variables from a shared lib into an app's dynbss
281 section, and instead use a dynamic relocation to point into the
282 shared lib. */
283 #define ELIMINATE_COPY_RELOCS 1
284
285 /* Copy the extra info we tack onto an elf_link_hash_entry. */
286
287 static void
288 ppc_elf_copy_indirect_symbol (struct elf_backend_data *bed,
289 struct elf_link_hash_entry *dir,
290 struct elf_link_hash_entry *ind)
291 {
292 struct ppc_elf_link_hash_entry *edir, *eind;
293
294 edir = (struct ppc_elf_link_hash_entry *) dir;
295 eind = (struct ppc_elf_link_hash_entry *) ind;
296
297 if (eind->dyn_relocs != NULL)
298 {
299 if (edir->dyn_relocs != NULL)
300 {
301 struct ppc_elf_dyn_relocs **pp;
302 struct ppc_elf_dyn_relocs *p;
303
304 if (ind->root.type == bfd_link_hash_indirect)
305 abort ();
306
307 /* Add reloc counts against the weak sym to the strong sym
308 list. Merge any entries against the same section. */
309 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
310 {
311 struct ppc_elf_dyn_relocs *q;
312
313 for (q = edir->dyn_relocs; q != NULL; q = q->next)
314 if (q->sec == p->sec)
315 {
316 q->pc_count += p->pc_count;
317 q->count += p->count;
318 *pp = p->next;
319 break;
320 }
321 if (q == NULL)
322 pp = &p->next;
323 }
324 *pp = edir->dyn_relocs;
325 }
326
327 edir->dyn_relocs = eind->dyn_relocs;
328 eind->dyn_relocs = NULL;
329 }
330
331 edir->tls_mask |= eind->tls_mask;
332
333 if (ELIMINATE_COPY_RELOCS
334 && ind->root.type != bfd_link_hash_indirect
335 && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
336 /* If called to transfer flags for a weakdef during processing
337 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
338 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
339 dir->elf_link_hash_flags |=
340 (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
341 | ELF_LINK_HASH_REF_REGULAR
342 | ELF_LINK_HASH_REF_REGULAR_NONWEAK));
343 else
344 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
345 }
346 \f
347 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
348
349 static reloc_howto_type ppc_elf_howto_raw[] = {
350 /* This reloc does nothing. */
351 HOWTO (R_PPC_NONE, /* type */
352 0, /* rightshift */
353 2, /* size (0 = byte, 1 = short, 2 = long) */
354 32, /* bitsize */
355 FALSE, /* pc_relative */
356 0, /* bitpos */
357 complain_overflow_bitfield, /* complain_on_overflow */
358 bfd_elf_generic_reloc, /* special_function */
359 "R_PPC_NONE", /* name */
360 FALSE, /* partial_inplace */
361 0, /* src_mask */
362 0, /* dst_mask */
363 FALSE), /* pcrel_offset */
364
365 /* A standard 32 bit relocation. */
366 HOWTO (R_PPC_ADDR32, /* type */
367 0, /* rightshift */
368 2, /* size (0 = byte, 1 = short, 2 = long) */
369 32, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_bitfield, /* complain_on_overflow */
373 bfd_elf_generic_reloc, /* special_function */
374 "R_PPC_ADDR32", /* name */
375 FALSE, /* partial_inplace */
376 0, /* src_mask */
377 0xffffffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 /* An absolute 26 bit branch; the lower two bits must be zero.
381 FIXME: we don't check that, we just clear them. */
382 HOWTO (R_PPC_ADDR24, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 26, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_bitfield, /* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_PPC_ADDR24", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0x3fffffc, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 /* A standard 16 bit relocation. */
397 HOWTO (R_PPC_ADDR16, /* type */
398 0, /* rightshift */
399 1, /* size (0 = byte, 1 = short, 2 = long) */
400 16, /* bitsize */
401 FALSE, /* pc_relative */
402 0, /* bitpos */
403 complain_overflow_bitfield, /* complain_on_overflow */
404 bfd_elf_generic_reloc, /* special_function */
405 "R_PPC_ADDR16", /* name */
406 FALSE, /* partial_inplace */
407 0, /* src_mask */
408 0xffff, /* dst_mask */
409 FALSE), /* pcrel_offset */
410
411 /* A 16 bit relocation without overflow. */
412 HOWTO (R_PPC_ADDR16_LO, /* type */
413 0, /* rightshift */
414 1, /* size (0 = byte, 1 = short, 2 = long) */
415 16, /* bitsize */
416 FALSE, /* pc_relative */
417 0, /* bitpos */
418 complain_overflow_dont,/* complain_on_overflow */
419 bfd_elf_generic_reloc, /* special_function */
420 "R_PPC_ADDR16_LO", /* name */
421 FALSE, /* partial_inplace */
422 0, /* src_mask */
423 0xffff, /* dst_mask */
424 FALSE), /* pcrel_offset */
425
426 /* The high order 16 bits of an address. */
427 HOWTO (R_PPC_ADDR16_HI, /* type */
428 16, /* rightshift */
429 1, /* size (0 = byte, 1 = short, 2 = long) */
430 16, /* bitsize */
431 FALSE, /* pc_relative */
432 0, /* bitpos */
433 complain_overflow_dont, /* complain_on_overflow */
434 bfd_elf_generic_reloc, /* special_function */
435 "R_PPC_ADDR16_HI", /* name */
436 FALSE, /* partial_inplace */
437 0, /* src_mask */
438 0xffff, /* dst_mask */
439 FALSE), /* pcrel_offset */
440
441 /* The high order 16 bits of an address, plus 1 if the contents of
442 the low 16 bits, treated as a signed number, is negative. */
443 HOWTO (R_PPC_ADDR16_HA, /* type */
444 16, /* rightshift */
445 1, /* size (0 = byte, 1 = short, 2 = long) */
446 16, /* bitsize */
447 FALSE, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_dont, /* complain_on_overflow */
450 ppc_elf_addr16_ha_reloc, /* special_function */
451 "R_PPC_ADDR16_HA", /* name */
452 FALSE, /* partial_inplace */
453 0, /* src_mask */
454 0xffff, /* dst_mask */
455 FALSE), /* pcrel_offset */
456
457 /* An absolute 16 bit branch; the lower two bits must be zero.
458 FIXME: we don't check that, we just clear them. */
459 HOWTO (R_PPC_ADDR14, /* type */
460 0, /* rightshift */
461 2, /* size (0 = byte, 1 = short, 2 = long) */
462 16, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_bitfield, /* complain_on_overflow */
466 bfd_elf_generic_reloc, /* special_function */
467 "R_PPC_ADDR14", /* name */
468 FALSE, /* partial_inplace */
469 0, /* src_mask */
470 0xfffc, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 /* An absolute 16 bit branch, for which bit 10 should be set to
474 indicate that the branch is expected to be taken. The lower two
475 bits must be zero. */
476 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
477 0, /* rightshift */
478 2, /* size (0 = byte, 1 = short, 2 = long) */
479 16, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_bitfield, /* complain_on_overflow */
483 bfd_elf_generic_reloc, /* special_function */
484 "R_PPC_ADDR14_BRTAKEN",/* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0xfffc, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* An absolute 16 bit branch, for which bit 10 should be set to
491 indicate that the branch is not expected to be taken. The lower
492 two bits must be zero. */
493 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 16, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_bitfield, /* complain_on_overflow */
500 bfd_elf_generic_reloc, /* special_function */
501 "R_PPC_ADDR14_BRNTAKEN",/* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0xfffc, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* A relative 26 bit branch; the lower two bits must be zero. */
508 HOWTO (R_PPC_REL24, /* type */
509 0, /* rightshift */
510 2, /* size (0 = byte, 1 = short, 2 = long) */
511 26, /* bitsize */
512 TRUE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_signed, /* complain_on_overflow */
515 bfd_elf_generic_reloc, /* special_function */
516 "R_PPC_REL24", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0x3fffffc, /* dst_mask */
520 TRUE), /* pcrel_offset */
521
522 /* A relative 16 bit branch; the lower two bits must be zero. */
523 HOWTO (R_PPC_REL14, /* type */
524 0, /* rightshift */
525 2, /* size (0 = byte, 1 = short, 2 = long) */
526 16, /* bitsize */
527 TRUE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_signed, /* complain_on_overflow */
530 bfd_elf_generic_reloc, /* special_function */
531 "R_PPC_REL14", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0xfffc, /* dst_mask */
535 TRUE), /* pcrel_offset */
536
537 /* A relative 16 bit branch. Bit 10 should be set to indicate that
538 the branch is expected to be taken. The lower two bits must be
539 zero. */
540 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
541 0, /* rightshift */
542 2, /* size (0 = byte, 1 = short, 2 = long) */
543 16, /* bitsize */
544 TRUE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_signed, /* complain_on_overflow */
547 bfd_elf_generic_reloc, /* special_function */
548 "R_PPC_REL14_BRTAKEN", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0xfffc, /* dst_mask */
552 TRUE), /* pcrel_offset */
553
554 /* A relative 16 bit branch. Bit 10 should be set to indicate that
555 the branch is not expected to be taken. The lower two bits must
556 be zero. */
557 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
558 0, /* rightshift */
559 2, /* size (0 = byte, 1 = short, 2 = long) */
560 16, /* bitsize */
561 TRUE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_signed, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC_REL14_BRNTAKEN",/* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 0xfffc, /* dst_mask */
569 TRUE), /* pcrel_offset */
570
571 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
572 symbol. */
573 HOWTO (R_PPC_GOT16, /* type */
574 0, /* rightshift */
575 1, /* size (0 = byte, 1 = short, 2 = long) */
576 16, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_signed, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_GOT16", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
588 the symbol. */
589 HOWTO (R_PPC_GOT16_LO, /* type */
590 0, /* rightshift */
591 1, /* size (0 = byte, 1 = short, 2 = long) */
592 16, /* bitsize */
593 FALSE, /* pc_relative */
594 0, /* bitpos */
595 complain_overflow_dont, /* complain_on_overflow */
596 bfd_elf_generic_reloc, /* special_function */
597 "R_PPC_GOT16_LO", /* name */
598 FALSE, /* partial_inplace */
599 0, /* src_mask */
600 0xffff, /* dst_mask */
601 FALSE), /* pcrel_offset */
602
603 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
604 the symbol. */
605 HOWTO (R_PPC_GOT16_HI, /* type */
606 16, /* rightshift */
607 1, /* size (0 = byte, 1 = short, 2 = long) */
608 16, /* bitsize */
609 FALSE, /* pc_relative */
610 0, /* bitpos */
611 complain_overflow_bitfield, /* complain_on_overflow */
612 bfd_elf_generic_reloc, /* special_function */
613 "R_PPC_GOT16_HI", /* name */
614 FALSE, /* partial_inplace */
615 0, /* src_mask */
616 0xffff, /* dst_mask */
617 FALSE), /* pcrel_offset */
618
619 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
620 the symbol. */
621 HOWTO (R_PPC_GOT16_HA, /* type */
622 16, /* rightshift */
623 1, /* size (0 = byte, 1 = short, 2 = long) */
624 16, /* bitsize */
625 FALSE, /* pc_relative */
626 0, /* bitpos */
627 complain_overflow_bitfield, /* complain_on_overflow */
628 ppc_elf_addr16_ha_reloc, /* special_function */
629 "R_PPC_GOT16_HA", /* name */
630 FALSE, /* partial_inplace */
631 0, /* src_mask */
632 0xffff, /* dst_mask */
633 FALSE), /* pcrel_offset */
634
635 /* Like R_PPC_REL24, but referring to the procedure linkage table
636 entry for the symbol. */
637 HOWTO (R_PPC_PLTREL24, /* type */
638 0, /* rightshift */
639 2, /* size (0 = byte, 1 = short, 2 = long) */
640 26, /* bitsize */
641 TRUE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_signed, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC_PLTREL24", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0x3fffffc, /* dst_mask */
649 TRUE), /* pcrel_offset */
650
651 /* This is used only by the dynamic linker. The symbol should exist
652 both in the object being run and in some shared library. The
653 dynamic linker copies the data addressed by the symbol from the
654 shared library into the object, because the object being
655 run has to have the data at some particular address. */
656 HOWTO (R_PPC_COPY, /* type */
657 0, /* rightshift */
658 2, /* size (0 = byte, 1 = short, 2 = long) */
659 32, /* bitsize */
660 FALSE, /* pc_relative */
661 0, /* bitpos */
662 complain_overflow_bitfield, /* complain_on_overflow */
663 bfd_elf_generic_reloc, /* special_function */
664 "R_PPC_COPY", /* name */
665 FALSE, /* partial_inplace */
666 0, /* src_mask */
667 0, /* dst_mask */
668 FALSE), /* pcrel_offset */
669
670 /* Like R_PPC_ADDR32, but used when setting global offset table
671 entries. */
672 HOWTO (R_PPC_GLOB_DAT, /* type */
673 0, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 32, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_bitfield, /* complain_on_overflow */
679 bfd_elf_generic_reloc, /* special_function */
680 "R_PPC_GLOB_DAT", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffffffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* Marks a procedure linkage table entry for a symbol. */
687 HOWTO (R_PPC_JMP_SLOT, /* type */
688 0, /* rightshift */
689 2, /* size (0 = byte, 1 = short, 2 = long) */
690 32, /* bitsize */
691 FALSE, /* pc_relative */
692 0, /* bitpos */
693 complain_overflow_bitfield, /* complain_on_overflow */
694 bfd_elf_generic_reloc, /* special_function */
695 "R_PPC_JMP_SLOT", /* name */
696 FALSE, /* partial_inplace */
697 0, /* src_mask */
698 0, /* dst_mask */
699 FALSE), /* pcrel_offset */
700
701 /* Used only by the dynamic linker. When the object is run, this
702 longword is set to the load address of the object, plus the
703 addend. */
704 HOWTO (R_PPC_RELATIVE, /* type */
705 0, /* rightshift */
706 2, /* size (0 = byte, 1 = short, 2 = long) */
707 32, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_bitfield, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_PPC_RELATIVE", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffffffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* Like R_PPC_REL24, but uses the value of the symbol within the
719 object rather than the final value. Normally used for
720 _GLOBAL_OFFSET_TABLE_. */
721 HOWTO (R_PPC_LOCAL24PC, /* type */
722 0, /* rightshift */
723 2, /* size (0 = byte, 1 = short, 2 = long) */
724 26, /* bitsize */
725 TRUE, /* pc_relative */
726 0, /* bitpos */
727 complain_overflow_signed, /* complain_on_overflow */
728 bfd_elf_generic_reloc, /* special_function */
729 "R_PPC_LOCAL24PC", /* name */
730 FALSE, /* partial_inplace */
731 0, /* src_mask */
732 0x3fffffc, /* dst_mask */
733 TRUE), /* pcrel_offset */
734
735 /* Like R_PPC_ADDR32, but may be unaligned. */
736 HOWTO (R_PPC_UADDR32, /* type */
737 0, /* rightshift */
738 2, /* size (0 = byte, 1 = short, 2 = long) */
739 32, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_bitfield, /* complain_on_overflow */
743 bfd_elf_generic_reloc, /* special_function */
744 "R_PPC_UADDR32", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffffffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* Like R_PPC_ADDR16, but may be unaligned. */
751 HOWTO (R_PPC_UADDR16, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_bitfield, /* complain_on_overflow */
758 bfd_elf_generic_reloc, /* special_function */
759 "R_PPC_UADDR16", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* 32-bit PC relative */
766 HOWTO (R_PPC_REL32, /* type */
767 0, /* rightshift */
768 2, /* size (0 = byte, 1 = short, 2 = long) */
769 32, /* bitsize */
770 TRUE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_bitfield, /* complain_on_overflow */
773 bfd_elf_generic_reloc, /* special_function */
774 "R_PPC_REL32", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffffffff, /* dst_mask */
778 TRUE), /* pcrel_offset */
779
780 /* 32-bit relocation to the symbol's procedure linkage table.
781 FIXME: not supported. */
782 HOWTO (R_PPC_PLT32, /* type */
783 0, /* rightshift */
784 2, /* size (0 = byte, 1 = short, 2 = long) */
785 32, /* bitsize */
786 FALSE, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_bitfield, /* complain_on_overflow */
789 bfd_elf_generic_reloc, /* special_function */
790 "R_PPC_PLT32", /* name */
791 FALSE, /* partial_inplace */
792 0, /* src_mask */
793 0, /* dst_mask */
794 FALSE), /* pcrel_offset */
795
796 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
797 FIXME: not supported. */
798 HOWTO (R_PPC_PLTREL32, /* type */
799 0, /* rightshift */
800 2, /* size (0 = byte, 1 = short, 2 = long) */
801 32, /* bitsize */
802 TRUE, /* pc_relative */
803 0, /* bitpos */
804 complain_overflow_bitfield, /* complain_on_overflow */
805 bfd_elf_generic_reloc, /* special_function */
806 "R_PPC_PLTREL32", /* name */
807 FALSE, /* partial_inplace */
808 0, /* src_mask */
809 0, /* dst_mask */
810 TRUE), /* pcrel_offset */
811
812 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
813 the symbol. */
814 HOWTO (R_PPC_PLT16_LO, /* type */
815 0, /* rightshift */
816 1, /* size (0 = byte, 1 = short, 2 = long) */
817 16, /* bitsize */
818 FALSE, /* pc_relative */
819 0, /* bitpos */
820 complain_overflow_dont, /* complain_on_overflow */
821 bfd_elf_generic_reloc, /* special_function */
822 "R_PPC_PLT16_LO", /* name */
823 FALSE, /* partial_inplace */
824 0, /* src_mask */
825 0xffff, /* dst_mask */
826 FALSE), /* pcrel_offset */
827
828 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
829 the symbol. */
830 HOWTO (R_PPC_PLT16_HI, /* type */
831 16, /* rightshift */
832 1, /* size (0 = byte, 1 = short, 2 = long) */
833 16, /* bitsize */
834 FALSE, /* pc_relative */
835 0, /* bitpos */
836 complain_overflow_bitfield, /* complain_on_overflow */
837 bfd_elf_generic_reloc, /* special_function */
838 "R_PPC_PLT16_HI", /* name */
839 FALSE, /* partial_inplace */
840 0, /* src_mask */
841 0xffff, /* dst_mask */
842 FALSE), /* pcrel_offset */
843
844 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
845 the symbol. */
846 HOWTO (R_PPC_PLT16_HA, /* type */
847 16, /* rightshift */
848 1, /* size (0 = byte, 1 = short, 2 = long) */
849 16, /* bitsize */
850 FALSE, /* pc_relative */
851 0, /* bitpos */
852 complain_overflow_bitfield, /* complain_on_overflow */
853 ppc_elf_addr16_ha_reloc, /* special_function */
854 "R_PPC_PLT16_HA", /* name */
855 FALSE, /* partial_inplace */
856 0, /* src_mask */
857 0xffff, /* dst_mask */
858 FALSE), /* pcrel_offset */
859
860 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
861 small data items. */
862 HOWTO (R_PPC_SDAREL16, /* type */
863 0, /* rightshift */
864 1, /* size (0 = byte, 1 = short, 2 = long) */
865 16, /* bitsize */
866 FALSE, /* pc_relative */
867 0, /* bitpos */
868 complain_overflow_signed, /* complain_on_overflow */
869 bfd_elf_generic_reloc, /* special_function */
870 "R_PPC_SDAREL16", /* name */
871 FALSE, /* partial_inplace */
872 0, /* src_mask */
873 0xffff, /* dst_mask */
874 FALSE), /* pcrel_offset */
875
876 /* 16-bit section relative relocation. */
877 HOWTO (R_PPC_SECTOFF, /* type */
878 0, /* rightshift */
879 1, /* size (0 = byte, 1 = short, 2 = long) */
880 16, /* bitsize */
881 FALSE, /* pc_relative */
882 0, /* bitpos */
883 complain_overflow_bitfield, /* complain_on_overflow */
884 bfd_elf_generic_reloc, /* special_function */
885 "R_PPC_SECTOFF", /* name */
886 FALSE, /* partial_inplace */
887 0, /* src_mask */
888 0xffff, /* dst_mask */
889 FALSE), /* pcrel_offset */
890
891 /* 16-bit lower half section relative relocation. */
892 HOWTO (R_PPC_SECTOFF_LO, /* type */
893 0, /* rightshift */
894 1, /* size (0 = byte, 1 = short, 2 = long) */
895 16, /* bitsize */
896 FALSE, /* pc_relative */
897 0, /* bitpos */
898 complain_overflow_dont, /* complain_on_overflow */
899 bfd_elf_generic_reloc, /* special_function */
900 "R_PPC_SECTOFF_LO", /* name */
901 FALSE, /* partial_inplace */
902 0, /* src_mask */
903 0xffff, /* dst_mask */
904 FALSE), /* pcrel_offset */
905
906 /* 16-bit upper half section relative relocation. */
907 HOWTO (R_PPC_SECTOFF_HI, /* type */
908 16, /* rightshift */
909 1, /* size (0 = byte, 1 = short, 2 = long) */
910 16, /* bitsize */
911 FALSE, /* pc_relative */
912 0, /* bitpos */
913 complain_overflow_bitfield, /* complain_on_overflow */
914 bfd_elf_generic_reloc, /* special_function */
915 "R_PPC_SECTOFF_HI", /* name */
916 FALSE, /* partial_inplace */
917 0, /* src_mask */
918 0xffff, /* dst_mask */
919 FALSE), /* pcrel_offset */
920
921 /* 16-bit upper half adjusted section relative relocation. */
922 HOWTO (R_PPC_SECTOFF_HA, /* type */
923 16, /* rightshift */
924 1, /* size (0 = byte, 1 = short, 2 = long) */
925 16, /* bitsize */
926 FALSE, /* pc_relative */
927 0, /* bitpos */
928 complain_overflow_bitfield, /* complain_on_overflow */
929 ppc_elf_addr16_ha_reloc, /* special_function */
930 "R_PPC_SECTOFF_HA", /* name */
931 FALSE, /* partial_inplace */
932 0, /* src_mask */
933 0xffff, /* dst_mask */
934 FALSE), /* pcrel_offset */
935
936 /* Marker reloc for TLS. */
937 HOWTO (R_PPC_TLS,
938 0, /* rightshift */
939 2, /* size (0 = byte, 1 = short, 2 = long) */
940 32, /* bitsize */
941 FALSE, /* pc_relative */
942 0, /* bitpos */
943 complain_overflow_dont, /* complain_on_overflow */
944 bfd_elf_generic_reloc, /* special_function */
945 "R_PPC_TLS", /* name */
946 FALSE, /* partial_inplace */
947 0, /* src_mask */
948 0, /* dst_mask */
949 FALSE), /* pcrel_offset */
950
951 /* Computes the load module index of the load module that contains the
952 definition of its TLS sym. */
953 HOWTO (R_PPC_DTPMOD32,
954 0, /* rightshift */
955 2, /* size (0 = byte, 1 = short, 2 = long) */
956 32, /* bitsize */
957 FALSE, /* pc_relative */
958 0, /* bitpos */
959 complain_overflow_dont, /* complain_on_overflow */
960 ppc_elf_unhandled_reloc, /* special_function */
961 "R_PPC_DTPMOD32", /* name */
962 FALSE, /* partial_inplace */
963 0, /* src_mask */
964 0xffffffff, /* dst_mask */
965 FALSE), /* pcrel_offset */
966
967 /* Computes a dtv-relative displacement, the difference between the value
968 of sym+add and the base address of the thread-local storage block that
969 contains the definition of sym, minus 0x8000. */
970 HOWTO (R_PPC_DTPREL32,
971 0, /* rightshift */
972 2, /* size (0 = byte, 1 = short, 2 = long) */
973 32, /* bitsize */
974 FALSE, /* pc_relative */
975 0, /* bitpos */
976 complain_overflow_dont, /* complain_on_overflow */
977 ppc_elf_unhandled_reloc, /* special_function */
978 "R_PPC_DTPREL32", /* name */
979 FALSE, /* partial_inplace */
980 0, /* src_mask */
981 0xffffffff, /* dst_mask */
982 FALSE), /* pcrel_offset */
983
984 /* A 16 bit dtprel reloc. */
985 HOWTO (R_PPC_DTPREL16,
986 0, /* rightshift */
987 1, /* size (0 = byte, 1 = short, 2 = long) */
988 16, /* bitsize */
989 FALSE, /* pc_relative */
990 0, /* bitpos */
991 complain_overflow_signed, /* complain_on_overflow */
992 ppc_elf_unhandled_reloc, /* special_function */
993 "R_PPC_DTPREL16", /* name */
994 FALSE, /* partial_inplace */
995 0, /* src_mask */
996 0xffff, /* dst_mask */
997 FALSE), /* pcrel_offset */
998
999 /* Like DTPREL16, but no overflow. */
1000 HOWTO (R_PPC_DTPREL16_LO,
1001 0, /* rightshift */
1002 1, /* size (0 = byte, 1 = short, 2 = long) */
1003 16, /* bitsize */
1004 FALSE, /* pc_relative */
1005 0, /* bitpos */
1006 complain_overflow_dont, /* complain_on_overflow */
1007 ppc_elf_unhandled_reloc, /* special_function */
1008 "R_PPC_DTPREL16_LO", /* name */
1009 FALSE, /* partial_inplace */
1010 0, /* src_mask */
1011 0xffff, /* dst_mask */
1012 FALSE), /* pcrel_offset */
1013
1014 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1015 HOWTO (R_PPC_DTPREL16_HI,
1016 16, /* rightshift */
1017 1, /* size (0 = byte, 1 = short, 2 = long) */
1018 16, /* bitsize */
1019 FALSE, /* pc_relative */
1020 0, /* bitpos */
1021 complain_overflow_dont, /* complain_on_overflow */
1022 ppc_elf_unhandled_reloc, /* special_function */
1023 "R_PPC_DTPREL16_HI", /* name */
1024 FALSE, /* partial_inplace */
1025 0, /* src_mask */
1026 0xffff, /* dst_mask */
1027 FALSE), /* pcrel_offset */
1028
1029 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1030 HOWTO (R_PPC_DTPREL16_HA,
1031 16, /* rightshift */
1032 1, /* size (0 = byte, 1 = short, 2 = long) */
1033 16, /* bitsize */
1034 FALSE, /* pc_relative */
1035 0, /* bitpos */
1036 complain_overflow_dont, /* complain_on_overflow */
1037 ppc_elf_unhandled_reloc, /* special_function */
1038 "R_PPC_DTPREL16_HA", /* name */
1039 FALSE, /* partial_inplace */
1040 0, /* src_mask */
1041 0xffff, /* dst_mask */
1042 FALSE), /* pcrel_offset */
1043
1044 /* Computes a tp-relative displacement, the difference between the value of
1045 sym+add and the value of the thread pointer (r13). */
1046 HOWTO (R_PPC_TPREL32,
1047 0, /* rightshift */
1048 2, /* size (0 = byte, 1 = short, 2 = long) */
1049 32, /* bitsize */
1050 FALSE, /* pc_relative */
1051 0, /* bitpos */
1052 complain_overflow_dont, /* complain_on_overflow */
1053 ppc_elf_unhandled_reloc, /* special_function */
1054 "R_PPC_TPREL32", /* name */
1055 FALSE, /* partial_inplace */
1056 0, /* src_mask */
1057 0xffffffff, /* dst_mask */
1058 FALSE), /* pcrel_offset */
1059
1060 /* A 16 bit tprel reloc. */
1061 HOWTO (R_PPC_TPREL16,
1062 0, /* rightshift */
1063 1, /* size (0 = byte, 1 = short, 2 = long) */
1064 16, /* bitsize */
1065 FALSE, /* pc_relative */
1066 0, /* bitpos */
1067 complain_overflow_signed, /* complain_on_overflow */
1068 ppc_elf_unhandled_reloc, /* special_function */
1069 "R_PPC_TPREL16", /* name */
1070 FALSE, /* partial_inplace */
1071 0, /* src_mask */
1072 0xffff, /* dst_mask */
1073 FALSE), /* pcrel_offset */
1074
1075 /* Like TPREL16, but no overflow. */
1076 HOWTO (R_PPC_TPREL16_LO,
1077 0, /* rightshift */
1078 1, /* size (0 = byte, 1 = short, 2 = long) */
1079 16, /* bitsize */
1080 FALSE, /* pc_relative */
1081 0, /* bitpos */
1082 complain_overflow_dont, /* complain_on_overflow */
1083 ppc_elf_unhandled_reloc, /* special_function */
1084 "R_PPC_TPREL16_LO", /* name */
1085 FALSE, /* partial_inplace */
1086 0, /* src_mask */
1087 0xffff, /* dst_mask */
1088 FALSE), /* pcrel_offset */
1089
1090 /* Like TPREL16_LO, but next higher group of 16 bits. */
1091 HOWTO (R_PPC_TPREL16_HI,
1092 16, /* rightshift */
1093 1, /* size (0 = byte, 1 = short, 2 = long) */
1094 16, /* bitsize */
1095 FALSE, /* pc_relative */
1096 0, /* bitpos */
1097 complain_overflow_dont, /* complain_on_overflow */
1098 ppc_elf_unhandled_reloc, /* special_function */
1099 "R_PPC_TPREL16_HI", /* name */
1100 FALSE, /* partial_inplace */
1101 0, /* src_mask */
1102 0xffff, /* dst_mask */
1103 FALSE), /* pcrel_offset */
1104
1105 /* Like TPREL16_HI, but adjust for low 16 bits. */
1106 HOWTO (R_PPC_TPREL16_HA,
1107 16, /* rightshift */
1108 1, /* size (0 = byte, 1 = short, 2 = long) */
1109 16, /* bitsize */
1110 FALSE, /* pc_relative */
1111 0, /* bitpos */
1112 complain_overflow_dont, /* complain_on_overflow */
1113 ppc_elf_unhandled_reloc, /* special_function */
1114 "R_PPC_TPREL16_HA", /* name */
1115 FALSE, /* partial_inplace */
1116 0, /* src_mask */
1117 0xffff, /* dst_mask */
1118 FALSE), /* pcrel_offset */
1119
1120 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1121 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1122 to the first entry. */
1123 HOWTO (R_PPC_GOT_TLSGD16,
1124 0, /* rightshift */
1125 1, /* size (0 = byte, 1 = short, 2 = long) */
1126 16, /* bitsize */
1127 FALSE, /* pc_relative */
1128 0, /* bitpos */
1129 complain_overflow_signed, /* complain_on_overflow */
1130 ppc_elf_unhandled_reloc, /* special_function */
1131 "R_PPC_GOT_TLSGD16", /* name */
1132 FALSE, /* partial_inplace */
1133 0, /* src_mask */
1134 0xffff, /* dst_mask */
1135 FALSE), /* pcrel_offset */
1136
1137 /* Like GOT_TLSGD16, but no overflow. */
1138 HOWTO (R_PPC_GOT_TLSGD16_LO,
1139 0, /* rightshift */
1140 1, /* size (0 = byte, 1 = short, 2 = long) */
1141 16, /* bitsize */
1142 FALSE, /* pc_relative */
1143 0, /* bitpos */
1144 complain_overflow_dont, /* complain_on_overflow */
1145 ppc_elf_unhandled_reloc, /* special_function */
1146 "R_PPC_GOT_TLSGD16_LO", /* name */
1147 FALSE, /* partial_inplace */
1148 0, /* src_mask */
1149 0xffff, /* dst_mask */
1150 FALSE), /* pcrel_offset */
1151
1152 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1153 HOWTO (R_PPC_GOT_TLSGD16_HI,
1154 16, /* rightshift */
1155 1, /* size (0 = byte, 1 = short, 2 = long) */
1156 16, /* bitsize */
1157 FALSE, /* pc_relative */
1158 0, /* bitpos */
1159 complain_overflow_dont, /* complain_on_overflow */
1160 ppc_elf_unhandled_reloc, /* special_function */
1161 "R_PPC_GOT_TLSGD16_HI", /* name */
1162 FALSE, /* partial_inplace */
1163 0, /* src_mask */
1164 0xffff, /* dst_mask */
1165 FALSE), /* pcrel_offset */
1166
1167 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1168 HOWTO (R_PPC_GOT_TLSGD16_HA,
1169 16, /* rightshift */
1170 1, /* size (0 = byte, 1 = short, 2 = long) */
1171 16, /* bitsize */
1172 FALSE, /* pc_relative */
1173 0, /* bitpos */
1174 complain_overflow_dont, /* complain_on_overflow */
1175 ppc_elf_unhandled_reloc, /* special_function */
1176 "R_PPC_GOT_TLSGD16_HA", /* name */
1177 FALSE, /* partial_inplace */
1178 0, /* src_mask */
1179 0xffff, /* dst_mask */
1180 FALSE), /* pcrel_offset */
1181
1182 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1183 with values (sym+add)@dtpmod and zero, and computes the offset to the
1184 first entry. */
1185 HOWTO (R_PPC_GOT_TLSLD16,
1186 0, /* rightshift */
1187 1, /* size (0 = byte, 1 = short, 2 = long) */
1188 16, /* bitsize */
1189 FALSE, /* pc_relative */
1190 0, /* bitpos */
1191 complain_overflow_signed, /* complain_on_overflow */
1192 ppc_elf_unhandled_reloc, /* special_function */
1193 "R_PPC_GOT_TLSLD16", /* name */
1194 FALSE, /* partial_inplace */
1195 0, /* src_mask */
1196 0xffff, /* dst_mask */
1197 FALSE), /* pcrel_offset */
1198
1199 /* Like GOT_TLSLD16, but no overflow. */
1200 HOWTO (R_PPC_GOT_TLSLD16_LO,
1201 0, /* rightshift */
1202 1, /* size (0 = byte, 1 = short, 2 = long) */
1203 16, /* bitsize */
1204 FALSE, /* pc_relative */
1205 0, /* bitpos */
1206 complain_overflow_dont, /* complain_on_overflow */
1207 ppc_elf_unhandled_reloc, /* special_function */
1208 "R_PPC_GOT_TLSLD16_LO", /* name */
1209 FALSE, /* partial_inplace */
1210 0, /* src_mask */
1211 0xffff, /* dst_mask */
1212 FALSE), /* pcrel_offset */
1213
1214 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1215 HOWTO (R_PPC_GOT_TLSLD16_HI,
1216 16, /* rightshift */
1217 1, /* size (0 = byte, 1 = short, 2 = long) */
1218 16, /* bitsize */
1219 FALSE, /* pc_relative */
1220 0, /* bitpos */
1221 complain_overflow_dont, /* complain_on_overflow */
1222 ppc_elf_unhandled_reloc, /* special_function */
1223 "R_PPC_GOT_TLSLD16_HI", /* name */
1224 FALSE, /* partial_inplace */
1225 0, /* src_mask */
1226 0xffff, /* dst_mask */
1227 FALSE), /* pcrel_offset */
1228
1229 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1230 HOWTO (R_PPC_GOT_TLSLD16_HA,
1231 16, /* rightshift */
1232 1, /* size (0 = byte, 1 = short, 2 = long) */
1233 16, /* bitsize */
1234 FALSE, /* pc_relative */
1235 0, /* bitpos */
1236 complain_overflow_dont, /* complain_on_overflow */
1237 ppc_elf_unhandled_reloc, /* special_function */
1238 "R_PPC_GOT_TLSLD16_HA", /* name */
1239 FALSE, /* partial_inplace */
1240 0, /* src_mask */
1241 0xffff, /* dst_mask */
1242 FALSE), /* pcrel_offset */
1243
1244 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1245 the offset to the entry. */
1246 HOWTO (R_PPC_GOT_DTPREL16,
1247 0, /* rightshift */
1248 1, /* size (0 = byte, 1 = short, 2 = long) */
1249 16, /* bitsize */
1250 FALSE, /* pc_relative */
1251 0, /* bitpos */
1252 complain_overflow_signed, /* complain_on_overflow */
1253 ppc_elf_unhandled_reloc, /* special_function */
1254 "R_PPC_GOT_DTPREL16", /* name */
1255 FALSE, /* partial_inplace */
1256 0, /* src_mask */
1257 0xffff, /* dst_mask */
1258 FALSE), /* pcrel_offset */
1259
1260 /* Like GOT_DTPREL16, but no overflow. */
1261 HOWTO (R_PPC_GOT_DTPREL16_LO,
1262 0, /* rightshift */
1263 1, /* size (0 = byte, 1 = short, 2 = long) */
1264 16, /* bitsize */
1265 FALSE, /* pc_relative */
1266 0, /* bitpos */
1267 complain_overflow_dont, /* complain_on_overflow */
1268 ppc_elf_unhandled_reloc, /* special_function */
1269 "R_PPC_GOT_DTPREL16_LO", /* name */
1270 FALSE, /* partial_inplace */
1271 0, /* src_mask */
1272 0xffff, /* dst_mask */
1273 FALSE), /* pcrel_offset */
1274
1275 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1276 HOWTO (R_PPC_GOT_DTPREL16_HI,
1277 16, /* rightshift */
1278 1, /* size (0 = byte, 1 = short, 2 = long) */
1279 16, /* bitsize */
1280 FALSE, /* pc_relative */
1281 0, /* bitpos */
1282 complain_overflow_dont, /* complain_on_overflow */
1283 ppc_elf_unhandled_reloc, /* special_function */
1284 "R_PPC_GOT_DTPREL16_HI", /* name */
1285 FALSE, /* partial_inplace */
1286 0, /* src_mask */
1287 0xffff, /* dst_mask */
1288 FALSE), /* pcrel_offset */
1289
1290 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1291 HOWTO (R_PPC_GOT_DTPREL16_HA,
1292 16, /* rightshift */
1293 1, /* size (0 = byte, 1 = short, 2 = long) */
1294 16, /* bitsize */
1295 FALSE, /* pc_relative */
1296 0, /* bitpos */
1297 complain_overflow_dont, /* complain_on_overflow */
1298 ppc_elf_unhandled_reloc, /* special_function */
1299 "R_PPC_GOT_DTPREL16_HA", /* name */
1300 FALSE, /* partial_inplace */
1301 0, /* src_mask */
1302 0xffff, /* dst_mask */
1303 FALSE), /* pcrel_offset */
1304
1305 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1306 offset to the entry. */
1307 HOWTO (R_PPC_GOT_TPREL16,
1308 0, /* rightshift */
1309 1, /* size (0 = byte, 1 = short, 2 = long) */
1310 16, /* bitsize */
1311 FALSE, /* pc_relative */
1312 0, /* bitpos */
1313 complain_overflow_signed, /* complain_on_overflow */
1314 ppc_elf_unhandled_reloc, /* special_function */
1315 "R_PPC_GOT_TPREL16", /* name */
1316 FALSE, /* partial_inplace */
1317 0, /* src_mask */
1318 0xffff, /* dst_mask */
1319 FALSE), /* pcrel_offset */
1320
1321 /* Like GOT_TPREL16, but no overflow. */
1322 HOWTO (R_PPC_GOT_TPREL16_LO,
1323 0, /* rightshift */
1324 1, /* size (0 = byte, 1 = short, 2 = long) */
1325 16, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_dont, /* complain_on_overflow */
1329 ppc_elf_unhandled_reloc, /* special_function */
1330 "R_PPC_GOT_TPREL16_LO", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0xffff, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1337 HOWTO (R_PPC_GOT_TPREL16_HI,
1338 16, /* rightshift */
1339 1, /* size (0 = byte, 1 = short, 2 = long) */
1340 16, /* bitsize */
1341 FALSE, /* pc_relative */
1342 0, /* bitpos */
1343 complain_overflow_dont, /* complain_on_overflow */
1344 ppc_elf_unhandled_reloc, /* special_function */
1345 "R_PPC_GOT_TPREL16_HI", /* name */
1346 FALSE, /* partial_inplace */
1347 0, /* src_mask */
1348 0xffff, /* dst_mask */
1349 FALSE), /* pcrel_offset */
1350
1351 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1352 HOWTO (R_PPC_GOT_TPREL16_HA,
1353 16, /* rightshift */
1354 1, /* size (0 = byte, 1 = short, 2 = long) */
1355 16, /* bitsize */
1356 FALSE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_dont, /* complain_on_overflow */
1359 ppc_elf_unhandled_reloc, /* special_function */
1360 "R_PPC_GOT_TPREL16_HA", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 0xffff, /* dst_mask */
1364 FALSE), /* pcrel_offset */
1365
1366 /* The remaining relocs are from the Embedded ELF ABI, and are not
1367 in the SVR4 ELF ABI. */
1368
1369 /* 32 bit value resulting from the addend minus the symbol. */
1370 HOWTO (R_PPC_EMB_NADDR32, /* type */
1371 0, /* rightshift */
1372 2, /* size (0 = byte, 1 = short, 2 = long) */
1373 32, /* bitsize */
1374 FALSE, /* pc_relative */
1375 0, /* bitpos */
1376 complain_overflow_bitfield, /* complain_on_overflow */
1377 bfd_elf_generic_reloc, /* special_function */
1378 "R_PPC_EMB_NADDR32", /* name */
1379 FALSE, /* partial_inplace */
1380 0, /* src_mask */
1381 0xffffffff, /* dst_mask */
1382 FALSE), /* pcrel_offset */
1383
1384 /* 16 bit value resulting from the addend minus the symbol. */
1385 HOWTO (R_PPC_EMB_NADDR16, /* type */
1386 0, /* rightshift */
1387 1, /* size (0 = byte, 1 = short, 2 = long) */
1388 16, /* bitsize */
1389 FALSE, /* pc_relative */
1390 0, /* bitpos */
1391 complain_overflow_bitfield, /* complain_on_overflow */
1392 bfd_elf_generic_reloc, /* special_function */
1393 "R_PPC_EMB_NADDR16", /* name */
1394 FALSE, /* partial_inplace */
1395 0, /* src_mask */
1396 0xffff, /* dst_mask */
1397 FALSE), /* pcrel_offset */
1398
1399 /* 16 bit value resulting from the addend minus the symbol. */
1400 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1401 0, /* rightshift */
1402 1, /* size (0 = byte, 1 = short, 2 = long) */
1403 16, /* bitsize */
1404 FALSE, /* pc_relative */
1405 0, /* bitpos */
1406 complain_overflow_dont,/* complain_on_overflow */
1407 bfd_elf_generic_reloc, /* special_function */
1408 "R_PPC_EMB_ADDR16_LO", /* name */
1409 FALSE, /* partial_inplace */
1410 0, /* src_mask */
1411 0xffff, /* dst_mask */
1412 FALSE), /* pcrel_offset */
1413
1414 /* The high order 16 bits of the addend minus the symbol. */
1415 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1416 16, /* rightshift */
1417 1, /* size (0 = byte, 1 = short, 2 = long) */
1418 16, /* bitsize */
1419 FALSE, /* pc_relative */
1420 0, /* bitpos */
1421 complain_overflow_dont, /* complain_on_overflow */
1422 bfd_elf_generic_reloc, /* special_function */
1423 "R_PPC_EMB_NADDR16_HI", /* name */
1424 FALSE, /* partial_inplace */
1425 0, /* src_mask */
1426 0xffff, /* dst_mask */
1427 FALSE), /* pcrel_offset */
1428
1429 /* The high order 16 bits of the result of the addend minus the address,
1430 plus 1 if the contents of the low 16 bits, treated as a signed number,
1431 is negative. */
1432 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1433 16, /* rightshift */
1434 1, /* size (0 = byte, 1 = short, 2 = long) */
1435 16, /* bitsize */
1436 FALSE, /* pc_relative */
1437 0, /* bitpos */
1438 complain_overflow_dont, /* complain_on_overflow */
1439 ppc_elf_addr16_ha_reloc, /* special_function */
1440 "R_PPC_EMB_NADDR16_HA", /* name */
1441 FALSE, /* partial_inplace */
1442 0, /* src_mask */
1443 0xffff, /* dst_mask */
1444 FALSE), /* pcrel_offset */
1445
1446 /* 16 bit value resulting from allocating a 4 byte word to hold an
1447 address in the .sdata section, and returning the offset from
1448 _SDA_BASE_ for that relocation. */
1449 HOWTO (R_PPC_EMB_SDAI16, /* type */
1450 0, /* rightshift */
1451 1, /* size (0 = byte, 1 = short, 2 = long) */
1452 16, /* bitsize */
1453 FALSE, /* pc_relative */
1454 0, /* bitpos */
1455 complain_overflow_bitfield, /* complain_on_overflow */
1456 bfd_elf_generic_reloc, /* special_function */
1457 "R_PPC_EMB_SDAI16", /* name */
1458 FALSE, /* partial_inplace */
1459 0, /* src_mask */
1460 0xffff, /* dst_mask */
1461 FALSE), /* pcrel_offset */
1462
1463 /* 16 bit value resulting from allocating a 4 byte word to hold an
1464 address in the .sdata2 section, and returning the offset from
1465 _SDA2_BASE_ for that relocation. */
1466 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1467 0, /* rightshift */
1468 1, /* size (0 = byte, 1 = short, 2 = long) */
1469 16, /* bitsize */
1470 FALSE, /* pc_relative */
1471 0, /* bitpos */
1472 complain_overflow_bitfield, /* complain_on_overflow */
1473 bfd_elf_generic_reloc, /* special_function */
1474 "R_PPC_EMB_SDA2I16", /* name */
1475 FALSE, /* partial_inplace */
1476 0, /* src_mask */
1477 0xffff, /* dst_mask */
1478 FALSE), /* pcrel_offset */
1479
1480 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1481 small data items. */
1482 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1483 0, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_signed, /* complain_on_overflow */
1489 bfd_elf_generic_reloc, /* special_function */
1490 "R_PPC_EMB_SDA2REL", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1497 signed offset from the appropriate base, and filling in the register
1498 field with the appropriate register (0, 2, or 13). */
1499 HOWTO (R_PPC_EMB_SDA21, /* type */
1500 0, /* rightshift */
1501 2, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_signed, /* complain_on_overflow */
1506 bfd_elf_generic_reloc, /* special_function */
1507 "R_PPC_EMB_SDA21", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xffff, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Relocation not handled: R_PPC_EMB_MRKREF */
1514 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1515 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1516 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1517 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1518 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1519
1520 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1521 in the 16 bit signed offset from the appropriate base, and filling in the
1522 register field with the appropriate register (0, 2, or 13). */
1523 HOWTO (R_PPC_EMB_RELSDA, /* type */
1524 0, /* rightshift */
1525 1, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 TRUE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_signed, /* complain_on_overflow */
1530 bfd_elf_generic_reloc, /* special_function */
1531 "R_PPC_EMB_RELSDA", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0xffff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* GNU extension to record C++ vtable hierarchy. */
1538 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1539 0, /* rightshift */
1540 0, /* size (0 = byte, 1 = short, 2 = long) */
1541 0, /* bitsize */
1542 FALSE, /* pc_relative */
1543 0, /* bitpos */
1544 complain_overflow_dont, /* complain_on_overflow */
1545 NULL, /* special_function */
1546 "R_PPC_GNU_VTINHERIT", /* name */
1547 FALSE, /* partial_inplace */
1548 0, /* src_mask */
1549 0, /* dst_mask */
1550 FALSE), /* pcrel_offset */
1551
1552 /* GNU extension to record C++ vtable member usage. */
1553 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1554 0, /* rightshift */
1555 0, /* size (0 = byte, 1 = short, 2 = long) */
1556 0, /* bitsize */
1557 FALSE, /* pc_relative */
1558 0, /* bitpos */
1559 complain_overflow_dont, /* complain_on_overflow */
1560 NULL, /* special_function */
1561 "R_PPC_GNU_VTENTRY", /* name */
1562 FALSE, /* partial_inplace */
1563 0, /* src_mask */
1564 0, /* dst_mask */
1565 FALSE), /* pcrel_offset */
1566
1567 /* Phony reloc to handle AIX style TOC entries. */
1568 HOWTO (R_PPC_TOC16, /* type */
1569 0, /* rightshift */
1570 1, /* size (0 = byte, 1 = short, 2 = long) */
1571 16, /* bitsize */
1572 FALSE, /* pc_relative */
1573 0, /* bitpos */
1574 complain_overflow_signed, /* complain_on_overflow */
1575 bfd_elf_generic_reloc, /* special_function */
1576 "R_PPC_TOC16", /* name */
1577 FALSE, /* partial_inplace */
1578 0, /* src_mask */
1579 0xffff, /* dst_mask */
1580 FALSE), /* pcrel_offset */
1581 };
1582 \f
1583 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1584
1585 static void
1586 ppc_elf_howto_init (void)
1587 {
1588 unsigned int i, type;
1589
1590 for (i = 0;
1591 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1592 i++)
1593 {
1594 type = ppc_elf_howto_raw[i].type;
1595 if (type >= (sizeof (ppc_elf_howto_table)
1596 / sizeof (ppc_elf_howto_table[0])))
1597 abort ();
1598 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1599 }
1600 }
1601 \f
1602 /* This function handles relaxing for the PPC with option --mpc860c0[=<n>].
1603
1604 The MPC860, revision C0 or earlier contains a bug in the die.
1605 If all of the following conditions are true, the next instruction
1606 to be executed *may* be treated as a no-op.
1607 1/ A forward branch is executed.
1608 2/ The branch is predicted as not taken.
1609 3/ The branch is taken.
1610 4/ The branch is located in the last 5 words of a page.
1611 (The EOP limit is 5 by default but may be specified as any value
1612 from 1-10.)
1613
1614 Our software solution is to detect these problematic branches in a
1615 linker pass and modify them as follows:
1616 1/ Unconditional branches - Since these are always predicted taken,
1617 there is no problem and no action is required.
1618 2/ Conditional backward branches - No problem, no action required.
1619 3/ Conditional forward branches - Ensure that the "inverse prediction
1620 bit" is set (ensure it is predicted taken).
1621 4/ Conditional register branches - Ensure that the "y bit" is set
1622 (ensure it is predicted taken). */
1623
1624 /* Sort sections by address. */
1625
1626 static int
1627 ppc_elf_sort_rela (const void *arg1, const void *arg2)
1628 {
1629 const Elf_Internal_Rela * const *rela1 = arg1;
1630 const Elf_Internal_Rela * const *rela2 = arg2;
1631
1632 /* Sort by offset. */
1633 return ((*rela1)->r_offset - (*rela2)->r_offset);
1634 }
1635
1636 static bfd_boolean
1637 ppc_elf_relax_section (bfd *abfd,
1638 asection *isec,
1639 struct bfd_link_info *link_info,
1640 bfd_boolean *again)
1641 {
1642 #define PAGESIZE 0x1000
1643
1644 bfd_byte *contents = NULL;
1645 bfd_byte *free_contents = NULL;
1646 Elf_Internal_Rela *internal_relocs = NULL;
1647 Elf_Internal_Rela *free_relocs = NULL;
1648 Elf_Internal_Rela **rela_comb = NULL;
1649 int comb_curr, comb_count;
1650
1651 /* We never have to do this more than once per input section. */
1652 *again = FALSE;
1653
1654 /* If needed, initialize this section's cooked size. */
1655 if (isec->_cooked_size == 0)
1656 isec->_cooked_size = isec->_raw_size;
1657
1658 /* We're only interested in text sections which overlap the
1659 troublesome area at the end of a page. */
1660 if (link_info->mpc860c0 && (isec->flags & SEC_CODE) && isec->_cooked_size)
1661 {
1662 bfd_vma dot, end_page, end_section;
1663 bfd_boolean section_modified;
1664
1665 /* Get the section contents. */
1666 /* Get cached copy if it exists. */
1667 if (elf_section_data (isec)->this_hdr.contents != NULL)
1668 contents = elf_section_data (isec)->this_hdr.contents;
1669 else
1670 {
1671 /* Go get them off disk. */
1672 contents = bfd_malloc (isec->_raw_size);
1673 if (contents == NULL)
1674 goto error_return;
1675 free_contents = contents;
1676
1677 if (! bfd_get_section_contents (abfd, isec, contents,
1678 (file_ptr) 0, isec->_raw_size))
1679 goto error_return;
1680 }
1681
1682 comb_curr = 0;
1683 comb_count = 0;
1684 if (isec->reloc_count)
1685 {
1686 unsigned n;
1687 bfd_size_type amt;
1688
1689 /* Get a copy of the native relocations. */
1690 internal_relocs
1691 = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
1692 link_info->keep_memory);
1693 if (internal_relocs == NULL)
1694 goto error_return;
1695 if (! link_info->keep_memory)
1696 free_relocs = internal_relocs;
1697
1698 /* Setup a faster access method for the reloc info we need. */
1699 amt = isec->reloc_count;
1700 amt *= sizeof (Elf_Internal_Rela*);
1701 rela_comb = bfd_malloc (amt);
1702 if (rela_comb == NULL)
1703 goto error_return;
1704 for (n = 0; n < isec->reloc_count; ++n)
1705 {
1706 enum elf_ppc_reloc_type r_type;
1707
1708 r_type = ELF32_R_TYPE (internal_relocs[n].r_info);
1709 if (r_type >= R_PPC_max)
1710 goto error_return;
1711
1712 /* Prologue constants are sometimes present in the ".text"
1713 sections and they can be identified by their associated
1714 relocation. We don't want to process those words and
1715 some others which can also be identified by their
1716 relocations. However, not all conditional branches will
1717 have a relocation so we will only ignore words that
1718 1) have a reloc, and 2) the reloc is not applicable to a
1719 conditional branch. The array rela_comb is built here
1720 for use in the EOP scan loop. */
1721 switch (r_type)
1722 {
1723 case R_PPC_ADDR14_BRNTAKEN:
1724 case R_PPC_REL14:
1725 case R_PPC_REL14_BRNTAKEN:
1726 /* We should check the instruction. */
1727 break;
1728 default:
1729 /* The word is not a conditional branch - ignore it. */
1730 rela_comb[comb_count++] = &internal_relocs[n];
1731 break;
1732 }
1733 }
1734 if (comb_count > 1)
1735 qsort (rela_comb, (size_t) comb_count, sizeof (int),
1736 ppc_elf_sort_rela);
1737 }
1738
1739 /* Enumerate each EOP region that overlaps this section. */
1740 end_section = isec->vma + isec->_cooked_size;
1741 dot = end_page = (isec->vma | (PAGESIZE - 1)) + 1;
1742 dot -= link_info->mpc860c0;
1743 section_modified = FALSE;
1744 /* Increment the start position if this section begins in the
1745 middle of its first EOP region. */
1746 if (dot < isec->vma)
1747 dot = isec->vma;
1748 for (;
1749 dot < end_section;
1750 dot += PAGESIZE, end_page += PAGESIZE)
1751 {
1752 /* Check each word in this EOP region. */
1753 for (; dot < end_page; dot += 4)
1754 {
1755 bfd_vma isec_offset;
1756 unsigned long insn;
1757 bfd_boolean skip, modified;
1758
1759 /* Don't process this word if there is a relocation for it
1760 and the relocation indicates the word is not a
1761 conditional branch. */
1762 skip = FALSE;
1763 isec_offset = dot - isec->vma;
1764 for (; comb_curr<comb_count; ++comb_curr)
1765 {
1766 bfd_vma r_offset;
1767
1768 r_offset = rela_comb[comb_curr]->r_offset;
1769 if (r_offset >= isec_offset)
1770 {
1771 if (r_offset == isec_offset) skip = TRUE;
1772 break;
1773 }
1774 }
1775 if (skip) continue;
1776
1777 /* Check the current word for a problematic conditional
1778 branch. */
1779 #define BO0(insn) ((insn) & 0x02000000)
1780 #define BO2(insn) ((insn) & 0x00800000)
1781 #define BO4(insn) ((insn) & 0x00200000)
1782 insn = (unsigned long) bfd_get_32 (abfd, contents + isec_offset);
1783 modified = FALSE;
1784 if ((insn & 0xFc000000) == 0x40000000)
1785 {
1786 /* Instruction is BCx */
1787 if ((!BO0(insn) || !BO2(insn)) && !BO4(insn))
1788 {
1789 bfd_vma target;
1790
1791 /* This branch is predicted as "normal".
1792 If this is a forward branch, it is problematic. */
1793 target = insn & 0x0000Fffc;
1794 target = (target ^ 0x8000) - 0x8000;
1795 if ((insn & 0x00000002) == 0)
1796 /* Convert to abs. */
1797 target += dot;
1798 if (target > dot)
1799 {
1800 /* Set the prediction bit. */
1801 insn |= 0x00200000;
1802 modified = TRUE;
1803 }
1804 }
1805 }
1806 else if ((insn & 0xFc00Fffe) == 0x4c000420)
1807 {
1808 /* Instruction is BCCTRx. */
1809 if ((!BO0(insn) || !BO2(insn)) && !BO4(insn))
1810 {
1811 /* This branch is predicted as not-taken.
1812 If this is a forward branch, it is problematic.
1813 Since we can't tell statically if it will branch
1814 forward, always set the prediction bit. */
1815 insn |= 0x00200000;
1816 modified = TRUE;
1817 }
1818 }
1819 else if ((insn & 0xFc00Fffe) == 0x4c000020)
1820 {
1821 /* Instruction is BCLRx */
1822 if ((!BO0(insn) || !BO2(insn)) && !BO4(insn))
1823 {
1824 /* This branch is predicted as not-taken.
1825 If this is a forward branch, it is problematic.
1826 Since we can't tell statically if it will branch
1827 forward, always set the prediction bit. */
1828 insn |= 0x00200000;
1829 modified = TRUE;
1830 }
1831 }
1832 #undef BO0
1833 #undef BO2
1834 #undef BO4
1835 if (modified)
1836 {
1837 bfd_put_32 (abfd, insn, contents + isec_offset);
1838 section_modified = TRUE;
1839 }
1840 }
1841 }
1842 if (section_modified)
1843 {
1844 elf_section_data (isec)->this_hdr.contents = contents;
1845 free_contents = NULL;
1846 }
1847 }
1848
1849 if (rela_comb != NULL)
1850 {
1851 free (rela_comb);
1852 rela_comb = NULL;
1853 }
1854
1855 if (free_relocs != NULL)
1856 {
1857 free (free_relocs);
1858 free_relocs = NULL;
1859 }
1860
1861 if (free_contents != NULL)
1862 {
1863 if (! link_info->keep_memory)
1864 free (free_contents);
1865 else
1866 {
1867 /* Cache the section contents for elf_link_input_bfd. */
1868 elf_section_data (isec)->this_hdr.contents = contents;
1869 }
1870 free_contents = NULL;
1871 }
1872
1873 return TRUE;
1874
1875 error_return:
1876 if (rela_comb != NULL)
1877 free (rela_comb);
1878 if (free_relocs != NULL)
1879 free (free_relocs);
1880 if (free_contents != NULL)
1881 free (free_contents);
1882 return FALSE;
1883 }
1884 \f
1885 static reloc_howto_type *
1886 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1887 bfd_reloc_code_real_type code)
1888 {
1889 enum elf_ppc_reloc_type r;
1890
1891 /* Initialize howto table if not already done. */
1892 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1893 ppc_elf_howto_init ();
1894
1895 switch (code)
1896 {
1897 default:
1898 return NULL;
1899
1900 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1901 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1902 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1903 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1904 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1905 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1906 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1907 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1908 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1909 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1910 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1911 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1912 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1913 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1914 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1915 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1916 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1917 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1918 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1919 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1920 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1921 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1922 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1923 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1924 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1925 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1926 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1927 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1928 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1929 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1930 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1931 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1932 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1933 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1934 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1935 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1936 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1937 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1938 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1939 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1940 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1941 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1942 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1943 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1944 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1945 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1946 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1947 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1948 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1949 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1950 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1951 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1952 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1953 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1954 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1955 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1956 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1957 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1958 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1959 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1960 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1961 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1962 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1963 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1964 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1965 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1966 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1967 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1968 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1969 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1970 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1971 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1972 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1973 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1974 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1975 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1976 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1977 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1978 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1979 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1980 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1981 }
1982
1983 return ppc_elf_howto_table[r];
1984 };
1985
1986 /* Set the howto pointer for a PowerPC ELF reloc. */
1987
1988 static void
1989 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1990 arelent *cache_ptr,
1991 Elf_Internal_Rela *dst)
1992 {
1993 /* Initialize howto table if not already done. */
1994 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1995 ppc_elf_howto_init ();
1996
1997 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1998 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1999 }
2000
2001 /* Handle the R_PPC_ADDR16_HA reloc. */
2002
2003 static bfd_reloc_status_type
2004 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2005 arelent *reloc_entry,
2006 asymbol *symbol,
2007 void *data ATTRIBUTE_UNUSED,
2008 asection *input_section,
2009 bfd *output_bfd,
2010 char **error_message ATTRIBUTE_UNUSED)
2011 {
2012 bfd_vma relocation;
2013
2014 if (output_bfd != NULL)
2015 {
2016 reloc_entry->address += input_section->output_offset;
2017 return bfd_reloc_ok;
2018 }
2019
2020 if (reloc_entry->address > input_section->_cooked_size)
2021 return bfd_reloc_outofrange;
2022
2023 if (bfd_is_com_section (symbol->section))
2024 relocation = 0;
2025 else
2026 relocation = symbol->value;
2027
2028 relocation += symbol->section->output_section->vma;
2029 relocation += symbol->section->output_offset;
2030 relocation += reloc_entry->addend;
2031
2032 reloc_entry->addend += (relocation & 0x8000) << 1;
2033
2034 return bfd_reloc_continue;
2035 }
2036
2037 static bfd_reloc_status_type
2038 ppc_elf_unhandled_reloc (bfd *abfd,
2039 arelent *reloc_entry,
2040 asymbol *symbol,
2041 void *data,
2042 asection *input_section,
2043 bfd *output_bfd,
2044 char **error_message)
2045 {
2046 /* If this is a relocatable link (output_bfd test tells us), just
2047 call the generic function. Any adjustment will be done at final
2048 link time. */
2049 if (output_bfd != NULL)
2050 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2051 input_section, output_bfd, error_message);
2052
2053 if (error_message != NULL)
2054 {
2055 static char buf[60];
2056 sprintf (buf, _("generic linker can't handle %s"),
2057 reloc_entry->howto->name);
2058 *error_message = buf;
2059 }
2060 return bfd_reloc_dangerous;
2061 }
2062
2063 /* Fix bad default arch selected for a 32 bit input bfd when the
2064 default is 64 bit. */
2065
2066 static bfd_boolean
2067 ppc_elf_object_p (bfd *abfd)
2068 {
2069 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2070 {
2071 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2072
2073 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2074 {
2075 /* Relies on arch after 64 bit default being 32 bit default. */
2076 abfd->arch_info = abfd->arch_info->next;
2077 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2078 }
2079 }
2080 return TRUE;
2081 }
2082
2083 /* Function to set whether a module needs the -mrelocatable bit set. */
2084
2085 static bfd_boolean
2086 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2087 {
2088 BFD_ASSERT (!elf_flags_init (abfd)
2089 || elf_elfheader (abfd)->e_flags == flags);
2090
2091 elf_elfheader (abfd)->e_flags = flags;
2092 elf_flags_init (abfd) = TRUE;
2093 return TRUE;
2094 }
2095
2096 /* Merge backend specific data from an object file to the output
2097 object file when linking. */
2098
2099 static bfd_boolean
2100 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2101 {
2102 flagword old_flags;
2103 flagword new_flags;
2104 bfd_boolean error;
2105
2106 /* Check if we have the same endianess. */
2107 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
2108 return FALSE;
2109
2110 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2111 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2112 return TRUE;
2113
2114 new_flags = elf_elfheader (ibfd)->e_flags;
2115 old_flags = elf_elfheader (obfd)->e_flags;
2116 if (!elf_flags_init (obfd))
2117 {
2118 /* First call, no flags set. */
2119 elf_flags_init (obfd) = TRUE;
2120 elf_elfheader (obfd)->e_flags = new_flags;
2121 }
2122
2123 /* Compatible flags are ok. */
2124 else if (new_flags == old_flags)
2125 ;
2126
2127 /* Incompatible flags. */
2128 else
2129 {
2130 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
2131 to be linked with either. */
2132 error = FALSE;
2133 if ((new_flags & EF_PPC_RELOCATABLE) != 0
2134 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
2135 {
2136 error = TRUE;
2137 (*_bfd_error_handler)
2138 (_("%s: compiled with -mrelocatable and linked with "
2139 "modules compiled normally"),
2140 bfd_archive_filename (ibfd));
2141 }
2142 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
2143 && (old_flags & EF_PPC_RELOCATABLE) != 0)
2144 {
2145 error = TRUE;
2146 (*_bfd_error_handler)
2147 (_("%s: compiled normally and linked with "
2148 "modules compiled with -mrelocatable"),
2149 bfd_archive_filename (ibfd));
2150 }
2151
2152 /* The output is -mrelocatable-lib iff both the input files are. */
2153 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
2154 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
2155
2156 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
2157 but each input file is either -mrelocatable or -mrelocatable-lib. */
2158 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
2159 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
2160 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
2161 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
2162
2163 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
2164 any module uses it. */
2165 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
2166
2167 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2168 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2169
2170 /* Warn about any other mismatches. */
2171 if (new_flags != old_flags)
2172 {
2173 error = TRUE;
2174 (*_bfd_error_handler)
2175 (_("%s: uses different e_flags (0x%lx) fields "
2176 "than previous modules (0x%lx)"),
2177 bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
2178 }
2179
2180 if (error)
2181 {
2182 bfd_set_error (bfd_error_bad_value);
2183 return FALSE;
2184 }
2185 }
2186
2187 return TRUE;
2188 }
2189 \f
2190 /* Handle a PowerPC specific section when reading an object file. This
2191 is called when elfcode.h finds a section with an unknown type. */
2192
2193 static bfd_boolean
2194 ppc_elf_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, const char *name)
2195 {
2196 asection *newsect;
2197 flagword flags;
2198
2199 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2200 return FALSE;
2201
2202 newsect = hdr->bfd_section;
2203 flags = bfd_get_section_flags (abfd, newsect);
2204 if (hdr->sh_flags & SHF_EXCLUDE)
2205 flags |= SEC_EXCLUDE;
2206
2207 if (hdr->sh_type == SHT_ORDERED)
2208 flags |= SEC_SORT_ENTRIES;
2209
2210 bfd_set_section_flags (abfd, newsect, flags);
2211 return TRUE;
2212 }
2213 \f
2214 /* Set up any other section flags and such that may be necessary. */
2215
2216 static bfd_boolean
2217 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2218 Elf_Internal_Shdr *shdr,
2219 asection *asect)
2220 {
2221 if ((asect->flags & SEC_EXCLUDE) != 0)
2222 shdr->sh_flags |= SHF_EXCLUDE;
2223
2224 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2225 shdr->sh_type = SHT_ORDERED;
2226
2227 return TRUE;
2228 }
2229 \f
2230 /* Find a linker generated pointer with a given addend and type. */
2231
2232 static elf_linker_section_pointers_t *
2233 elf_find_pointer_linker_section
2234 (elf_linker_section_pointers_t *linker_pointers,
2235 bfd_vma addend,
2236 elf_linker_section_t *lsect)
2237 {
2238 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2239 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2240 return linker_pointers;
2241
2242 return NULL;
2243 }
2244 \f
2245 /* Allocate a pointer to live in a linker created section. */
2246
2247 static bfd_boolean
2248 elf_create_pointer_linker_section (bfd *abfd,
2249 struct bfd_link_info *info,
2250 elf_linker_section_t *lsect,
2251 struct elf_link_hash_entry *h,
2252 const Elf_Internal_Rela *rel)
2253 {
2254 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2255 elf_linker_section_pointers_t *linker_section_ptr;
2256 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2257 bfd_size_type amt;
2258
2259 BFD_ASSERT (lsect != NULL);
2260
2261 /* Is this a global symbol? */
2262 if (h != NULL)
2263 {
2264 struct ppc_elf_link_hash_entry *eh;
2265
2266 /* Has this symbol already been allocated? If so, our work is done. */
2267 eh = (struct ppc_elf_link_hash_entry *) h;
2268 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2269 rel->r_addend,
2270 lsect))
2271 return TRUE;
2272
2273 ptr_linker_section_ptr = &eh->linker_section_pointer;
2274 /* Make sure this symbol is output as a dynamic symbol. */
2275 if (h->dynindx == -1)
2276 {
2277 if (! _bfd_elf_link_record_dynamic_symbol (info, h))
2278 return FALSE;
2279 }
2280
2281 if (lsect->rel_section)
2282 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
2283 }
2284 else
2285 {
2286 /* Allocation of a pointer to a local symbol. */
2287 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2288
2289 /* Allocate a table to hold the local symbols if first time. */
2290 if (!ptr)
2291 {
2292 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2293
2294 amt = num_symbols;
2295 amt *= sizeof (elf_linker_section_pointers_t *);
2296 ptr = bfd_zalloc (abfd, amt);
2297
2298 if (!ptr)
2299 return FALSE;
2300
2301 elf_local_ptr_offsets (abfd) = ptr;
2302 }
2303
2304 /* Has this symbol already been allocated? If so, our work is done. */
2305 if (elf_find_pointer_linker_section (ptr[r_symndx],
2306 rel->r_addend,
2307 lsect))
2308 return TRUE;
2309
2310 ptr_linker_section_ptr = &ptr[r_symndx];
2311
2312 if (info->shared)
2313 {
2314 /* If we are generating a shared object, we need to
2315 output a R_<xxx>_RELATIVE reloc so that the
2316 dynamic linker can adjust this GOT entry. */
2317 BFD_ASSERT (lsect->rel_section != NULL);
2318 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
2319 }
2320 }
2321
2322 /* Allocate space for a pointer in the linker section, and allocate
2323 a new pointer record from internal memory. */
2324 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2325 amt = sizeof (elf_linker_section_pointers_t);
2326 linker_section_ptr = bfd_alloc (abfd, amt);
2327
2328 if (!linker_section_ptr)
2329 return FALSE;
2330
2331 linker_section_ptr->next = *ptr_linker_section_ptr;
2332 linker_section_ptr->addend = rel->r_addend;
2333 linker_section_ptr->lsect = lsect;
2334 linker_section_ptr->written_address_p = FALSE;
2335 *ptr_linker_section_ptr = linker_section_ptr;
2336
2337 linker_section_ptr->offset = lsect->section->_raw_size;
2338 lsect->section->_raw_size += 4;
2339
2340 #ifdef DEBUG
2341 fprintf (stderr,
2342 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2343 lsect->name, (long) linker_section_ptr->offset,
2344 (long) lsect->section->_raw_size);
2345 #endif
2346
2347 return TRUE;
2348 }
2349 \f
2350 #define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR)
2351
2352 /* Fill in the address for a pointer generated in a linker section. */
2353
2354 static bfd_vma
2355 elf_finish_pointer_linker_section (bfd *output_bfd,
2356 bfd *input_bfd,
2357 struct bfd_link_info *info,
2358 elf_linker_section_t *lsect,
2359 struct elf_link_hash_entry *h,
2360 bfd_vma relocation,
2361 const Elf_Internal_Rela *rel,
2362 int relative_reloc)
2363 {
2364 elf_linker_section_pointers_t *linker_section_ptr;
2365
2366 BFD_ASSERT (lsect != NULL);
2367
2368 if (h != NULL)
2369 {
2370 /* Handle global symbol. */
2371 struct ppc_elf_link_hash_entry *eh;
2372
2373 eh = (struct ppc_elf_link_hash_entry *) h;
2374 linker_section_ptr
2375 = elf_find_pointer_linker_section (eh->linker_section_pointer,
2376 rel->r_addend,
2377 lsect);
2378
2379 BFD_ASSERT (linker_section_ptr != NULL);
2380
2381 if (! elf_hash_table (info)->dynamic_sections_created
2382 || (info->shared
2383 && info->symbolic
2384 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
2385 {
2386 /* This is actually a static link, or it is a
2387 -Bsymbolic link and the symbol is defined
2388 locally. We must initialize this entry in the
2389 global section.
2390
2391 When doing a dynamic link, we create a .rela.<xxx>
2392 relocation entry to initialize the value. This
2393 is done in the finish_dynamic_symbol routine. */
2394 if (!linker_section_ptr->written_address_p)
2395 {
2396 linker_section_ptr->written_address_p = TRUE;
2397 bfd_put_ptr (output_bfd,
2398 relocation + linker_section_ptr->addend,
2399 (lsect->section->contents
2400 + linker_section_ptr->offset));
2401 }
2402 }
2403 }
2404 else
2405 {
2406 /* Handle local symbol. */
2407 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2408 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
2409 BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
2410 linker_section_ptr = (elf_find_pointer_linker_section
2411 (elf_local_ptr_offsets (input_bfd)[r_symndx],
2412 rel->r_addend,
2413 lsect));
2414
2415 BFD_ASSERT (linker_section_ptr != NULL);
2416
2417 /* Write out pointer if it hasn't been rewritten out before. */
2418 if (!linker_section_ptr->written_address_p)
2419 {
2420 linker_section_ptr->written_address_p = TRUE;
2421 bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
2422 lsect->section->contents + linker_section_ptr->offset);
2423
2424 if (info->shared)
2425 {
2426 /* We need to generate a relative reloc for the dynamic
2427 linker. */
2428
2429 asection *srel = lsect->rel_section;
2430 Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL];
2431 bfd_byte *erel;
2432 struct elf_backend_data *bed = get_elf_backend_data (output_bfd);
2433 unsigned int i;
2434
2435 BFD_ASSERT (srel != NULL);
2436
2437 for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
2438 {
2439 outrel[i].r_offset = (lsect->section->output_section->vma
2440 + lsect->section->output_offset
2441 + linker_section_ptr->offset);
2442 outrel[i].r_info = 0;
2443 outrel[i].r_addend = 0;
2444 }
2445 outrel[0].r_info = ELF32_R_INFO (0, relative_reloc);
2446 erel = lsect->section->contents;
2447 erel += (elf_section_data (lsect->section)->rel_count++
2448 * sizeof (Elf32_External_Rela));
2449 bfd_elf32_swap_reloca_out (output_bfd, outrel, erel);
2450 }
2451 }
2452 }
2453
2454 relocation = (lsect->section->output_offset
2455 + linker_section_ptr->offset
2456 - lsect->sym_offset);
2457
2458 #ifdef DEBUG
2459 fprintf (stderr,
2460 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
2461 lsect->name, (long) relocation, (long) relocation);
2462 #endif
2463
2464 /* Subtract out the addend, because it will get added back in by the normal
2465 processing. */
2466 return relocation - linker_section_ptr->addend;
2467 }
2468 \f
2469 /* Create a special linker section */
2470 static elf_linker_section_t *
2471 ppc_elf_create_linker_section (bfd *abfd,
2472 struct bfd_link_info *info,
2473 enum elf_linker_section_enum which)
2474 {
2475 elf_linker_section_t *lsect;
2476 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2477 asection *s;
2478 bfd_size_type amt;
2479 flagword flags;
2480 const char *name;
2481 const char *rel_name;
2482 const char *sym_name;
2483 bfd_vma sym_offset;
2484
2485 /* Both of these sections are (technically) created by the user
2486 putting data in them, so they shouldn't be marked
2487 SEC_LINKER_CREATED.
2488
2489 The linker creates them so it has somewhere to attach their
2490 respective symbols. In fact, if they were empty it would
2491 be OK to leave the symbol set to 0 (or any random number), because
2492 the appropriate register should never be used. */
2493 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
2494 sym_offset = 32768;
2495
2496 switch (which)
2497 {
2498 default:
2499 abort ();
2500 return NULL;
2501
2502 case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
2503 name = ".sdata";
2504 rel_name = ".rela.sdata";
2505 sym_name = "_SDA_BASE_";
2506 break;
2507
2508 case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
2509 name = ".sdata2";
2510 rel_name = ".rela.sdata2";
2511 sym_name = "_SDA2_BASE_";
2512 flags |= SEC_READONLY;
2513 break;
2514 }
2515
2516 /* Record the first bfd that needs the special sections. */
2517 if (!htab->elf.dynobj)
2518 htab->elf.dynobj = abfd;
2519
2520 amt = sizeof (elf_linker_section_t);
2521 lsect = bfd_zalloc (htab->elf.dynobj, amt);
2522
2523 lsect->sym_offset = sym_offset;
2524
2525 /* See if the sections already exist. */
2526 s = bfd_get_section_by_name (htab->elf.dynobj, name);
2527 if (s == NULL || (s->flags & flags) != flags)
2528 {
2529 s = bfd_make_section_anyway (htab->elf.dynobj, name);
2530 if (s == NULL
2531 || !bfd_set_section_flags (htab->elf.dynobj, s, flags))
2532 return NULL;
2533 }
2534 lsect->section = s;
2535
2536 if (bfd_get_section_alignment (htab->elf.dynobj, s) < 2
2537 && !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2538 return NULL;
2539
2540 s->_raw_size = align_power (s->_raw_size, 2);
2541
2542 #ifdef DEBUG
2543 fprintf (stderr, "Creating section %s, current size = %ld\n",
2544 name, (long) s->_raw_size);
2545 #endif
2546
2547 if (sym_name)
2548 {
2549 struct elf_link_hash_entry *h;
2550 struct bfd_link_hash_entry *bh;
2551
2552 #ifdef DEBUG
2553 fprintf (stderr, "Adding %s to section %s\n", sym_name, name);
2554 #endif
2555 bh = bfd_link_hash_lookup (info->hash, sym_name,
2556 FALSE, FALSE, FALSE);
2557
2558 if ((bh == NULL || bh->type == bfd_link_hash_undefined)
2559 && !(_bfd_generic_link_add_one_symbol
2560 (info, abfd, sym_name, BSF_GLOBAL, s, sym_offset, NULL,
2561 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
2562 return NULL;
2563 h = (struct elf_link_hash_entry *) bh;
2564
2565 h->type = STT_OBJECT;
2566 lsect->sym_hash = h;
2567
2568 if (info->shared
2569 && ! _bfd_elf_link_record_dynamic_symbol (info, h))
2570 return NULL;
2571 }
2572
2573 if (info->shared)
2574 {
2575 s = bfd_make_section_anyway (htab->elf.dynobj, rel_name);
2576 lsect->rel_section = s;
2577 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2578 | SEC_LINKER_CREATED | SEC_READONLY);
2579 if (s == NULL
2580 || ! bfd_set_section_flags (htab->elf.dynobj, s, flags)
2581 || ! bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2582 return NULL;
2583 }
2584
2585 return lsect;
2586 }
2587 \f
2588 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
2589 need to bump up the number of section headers. */
2590
2591 static int
2592 ppc_elf_additional_program_headers (bfd *abfd)
2593 {
2594 asection *s;
2595 int ret;
2596
2597 ret = 0;
2598
2599 s = bfd_get_section_by_name (abfd, ".interp");
2600 if (s != NULL)
2601 ++ret;
2602
2603 s = bfd_get_section_by_name (abfd, ".sbss2");
2604 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2605 ++ret;
2606
2607 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2608 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2609 ++ret;
2610
2611 return ret;
2612 }
2613
2614 /* Modify the segment map if needed. */
2615
2616 static bfd_boolean
2617 ppc_elf_modify_segment_map (bfd *abfd ATTRIBUTE_UNUSED)
2618 {
2619 return TRUE;
2620 }
2621 \f
2622 /* The powerpc .got has a blrl instruction in it. Mark it executable. */
2623
2624 static bfd_boolean
2625 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2626 {
2627 struct ppc_elf_link_hash_table *htab;
2628 asection *s;
2629 flagword flags;
2630
2631 if (!_bfd_elf_create_got_section (abfd, info))
2632 return FALSE;
2633
2634 htab = ppc_elf_hash_table (info);
2635 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2636 if (s == NULL)
2637 abort ();
2638
2639 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2640 | SEC_LINKER_CREATED);
2641 if (!bfd_set_section_flags (abfd, s, flags))
2642 return FALSE;
2643
2644 htab->relgot = bfd_make_section (abfd, ".rela.got");
2645 if (!htab->relgot
2646 || ! bfd_set_section_flags (abfd, htab->relgot,
2647 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2648 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2649 | SEC_READONLY))
2650 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2651 return FALSE;
2652
2653 return TRUE;
2654 }
2655
2656 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2657 to output sections (just like _bfd_elf_create_dynamic_sections has
2658 to create .dynbss and .rela.bss). */
2659
2660 static bfd_boolean
2661 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2662 {
2663 struct ppc_elf_link_hash_table *htab;
2664 asection *s;
2665 flagword flags;
2666
2667 htab = ppc_elf_hash_table (info);
2668
2669 if (htab->got == NULL
2670 && !ppc_elf_create_got (abfd, info))
2671 return FALSE;
2672
2673 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2674 return FALSE;
2675
2676 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2677 | SEC_LINKER_CREATED);
2678
2679 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2680 htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
2681 if (s == NULL
2682 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
2683 return FALSE;
2684
2685 if (! info->shared)
2686 {
2687 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2688 htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss");
2689 if (s == NULL
2690 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
2691 || ! bfd_set_section_alignment (abfd, s, 2))
2692 return FALSE;
2693 }
2694
2695 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2696 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2697 if (s == NULL)
2698 abort ();
2699
2700 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
2701 return bfd_set_section_flags (abfd, s, flags);
2702 }
2703
2704 /* Adjust a symbol defined by a dynamic object and referenced by a
2705 regular object. The current definition is in some section of the
2706 dynamic object, but we're not including those sections. We have to
2707 change the definition to something the rest of the link can
2708 understand. */
2709
2710 static bfd_boolean
2711 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2712 struct elf_link_hash_entry *h)
2713 {
2714 struct ppc_elf_link_hash_table *htab;
2715 asection *s;
2716 unsigned int power_of_two;
2717
2718 #ifdef DEBUG
2719 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
2720 h->root.root.string);
2721 #endif
2722
2723 /* Make sure we know what is going on here. */
2724 htab = ppc_elf_hash_table (info);
2725 BFD_ASSERT (htab->elf.dynobj != NULL
2726 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2727 || h->weakdef != NULL
2728 || ((h->elf_link_hash_flags
2729 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2730 && (h->elf_link_hash_flags
2731 & ELF_LINK_HASH_REF_REGULAR) != 0
2732 && (h->elf_link_hash_flags
2733 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2734
2735 /* Deal with function syms. */
2736 if (h->type == STT_FUNC
2737 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2738 {
2739 /* Clear procedure linkage table information for any symbol that
2740 won't need a .plt entry. */
2741 if (h->plt.refcount <= 0
2742 || SYMBOL_CALLS_LOCAL (info, h)
2743 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2744 && h->root.type == bfd_link_hash_undefweak))
2745 {
2746 /* A PLT entry is not required/allowed when:
2747
2748 1. We are not using ld.so; because then the PLT entry
2749 can't be set up, so we can't use one. In this case,
2750 ppc_elf_adjust_dynamic_symbol won't even be called.
2751
2752 2. GC has rendered the entry unused.
2753
2754 3. We know for certain that a call to this symbol
2755 will go to this object, or will remain undefined. */
2756 h->plt.offset = (bfd_vma) -1;
2757 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2758 }
2759 return TRUE;
2760 }
2761 else
2762 h->plt.offset = (bfd_vma) -1;
2763
2764 /* If this is a weak symbol, and there is a real definition, the
2765 processor independent code will have arranged for us to see the
2766 real definition first, and we can just use the same value. */
2767 if (h->weakdef != NULL)
2768 {
2769 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2770 || h->weakdef->root.type == bfd_link_hash_defweak);
2771 h->root.u.def.section = h->weakdef->root.u.def.section;
2772 h->root.u.def.value = h->weakdef->root.u.def.value;
2773 if (ELIMINATE_COPY_RELOCS)
2774 h->elf_link_hash_flags
2775 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
2776 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
2777 return TRUE;
2778 }
2779
2780 /* This is a reference to a symbol defined by a dynamic object which
2781 is not a function. */
2782
2783 /* If we are creating a shared library, we must presume that the
2784 only references to the symbol are via the global offset table.
2785 For such cases we need not do anything here; the relocations will
2786 be handled correctly by relocate_section. */
2787 if (info->shared)
2788 return TRUE;
2789
2790 /* If there are no references to this symbol that do not use the
2791 GOT, we don't need to generate a copy reloc. */
2792 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
2793 return TRUE;
2794
2795 if (ELIMINATE_COPY_RELOCS)
2796 {
2797 struct ppc_elf_dyn_relocs *p;
2798 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
2799 {
2800 s = p->sec->output_section;
2801 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2802 break;
2803 }
2804
2805 /* If we didn't find any dynamic relocs in read-only sections, then
2806 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2807 if (p == NULL)
2808 {
2809 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
2810 return TRUE;
2811 }
2812 }
2813
2814 /* We must allocate the symbol in our .dynbss section, which will
2815 become part of the .bss section of the executable. There will be
2816 an entry for this symbol in the .dynsym section. The dynamic
2817 object will contain position independent code, so all references
2818 from the dynamic object to this symbol will go through the global
2819 offset table. The dynamic linker will use the .dynsym entry to
2820 determine the address it must put in the global offset table, so
2821 both the dynamic object and the regular object will refer to the
2822 same memory location for the variable.
2823
2824 Of course, if the symbol is sufficiently small, we must instead
2825 allocate it in .sbss. FIXME: It would be better to do this if and
2826 only if there were actually SDAREL relocs for that symbol. */
2827
2828 if (h->size <= elf_gp_size (htab->elf.dynobj))
2829 s = htab->dynsbss;
2830 else
2831 s = htab->dynbss;
2832 BFD_ASSERT (s != NULL);
2833
2834 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
2835 copy the initial value out of the dynamic object and into the
2836 runtime process image. We need to remember the offset into the
2837 .rela.bss section we are going to use. */
2838 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2839 {
2840 asection *srel;
2841
2842 if (h->size <= elf_gp_size (htab->elf.dynobj))
2843 srel = htab->relsbss;
2844 else
2845 srel = htab->relbss;
2846 BFD_ASSERT (srel != NULL);
2847 srel->_raw_size += sizeof (Elf32_External_Rela);
2848 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2849 }
2850
2851 /* We need to figure out the alignment required for this symbol. I
2852 have no idea how ELF linkers handle this. */
2853 power_of_two = bfd_log2 (h->size);
2854 if (power_of_two > 4)
2855 power_of_two = 4;
2856
2857 /* Apply the required alignment. */
2858 s->_raw_size = BFD_ALIGN (s->_raw_size,
2859 (bfd_size_type) (1 << power_of_two));
2860 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
2861 {
2862 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
2863 return FALSE;
2864 }
2865
2866 /* Define the symbol as being at this point in the section. */
2867 h->root.u.def.section = s;
2868 h->root.u.def.value = s->_raw_size;
2869
2870 /* Increment the section size to make room for the symbol. */
2871 s->_raw_size += h->size;
2872
2873 return TRUE;
2874 }
2875 \f
2876 /* This is the condition under which finish_dynamic_symbol will be
2877 called from elflink.h. If elflink.h doesn't call our
2878 finish_dynamic_symbol routine, we'll need to do something about
2879 initializing any .plt and .got entries in relocate_section. */
2880 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2881 ((DYN) \
2882 && ((SHARED) \
2883 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
2884 && ((H)->dynindx != -1 \
2885 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
2886
2887 /* Of those relocs that might be copied as dynamic relocs, this macro
2888 selects those that must be copied when linking a shared library,
2889 even when the symbol is local. */
2890
2891 #define MUST_BE_DYN_RELOC(RTYPE) \
2892 ((RTYPE) != R_PPC_REL24 \
2893 && (RTYPE) != R_PPC_REL14 \
2894 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2895 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2896 && (RTYPE) != R_PPC_REL32)
2897
2898 /* Allocate space in associated reloc sections for dynamic relocs. */
2899
2900 static bfd_boolean
2901 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2902 {
2903 struct bfd_link_info *info = inf;
2904 struct ppc_elf_link_hash_entry *eh;
2905 struct ppc_elf_link_hash_table *htab;
2906 struct ppc_elf_dyn_relocs *p;
2907
2908 if (h->root.type == bfd_link_hash_indirect)
2909 return TRUE;
2910
2911 if (h->root.type == bfd_link_hash_warning)
2912 /* When warning symbols are created, they **replace** the "real"
2913 entry in the hash table, thus we never get to see the real
2914 symbol in a hash traversal. So look at it now. */
2915 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2916
2917 htab = ppc_elf_hash_table (info);
2918 if (htab->elf.dynamic_sections_created
2919 && h->plt.refcount > 0)
2920 {
2921 /* Make sure this symbol is output as a dynamic symbol. */
2922 if (h->dynindx == -1
2923 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
2924 {
2925 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2926 return FALSE;
2927 }
2928
2929 if (info->shared
2930 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2931 {
2932 asection *s = htab->plt;
2933
2934 /* If this is the first .plt entry, make room for the special
2935 first entry. */
2936 if (s->_raw_size == 0)
2937 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
2938
2939 /* The PowerPC PLT is actually composed of two parts, the
2940 first part is 2 words (for a load and a jump), and then
2941 there is a remaining word available at the end. */
2942 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
2943 + (PLT_SLOT_SIZE
2944 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE)
2945 / PLT_ENTRY_SIZE)));
2946
2947 /* If this symbol is not defined in a regular file, and we
2948 are not generating a shared library, then set the symbol
2949 to this location in the .plt. This is required to make
2950 function pointers compare as equal between the normal
2951 executable and the shared library. */
2952 if (! info->shared
2953 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2954 {
2955 h->root.u.def.section = s;
2956 h->root.u.def.value = h->plt.offset;
2957 }
2958
2959 /* Make room for this entry. After the 8192nd entry, room
2960 for two entries is allocated. */
2961 s->_raw_size += PLT_ENTRY_SIZE;
2962 if ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
2963 > PLT_NUM_SINGLE_ENTRIES)
2964 s->_raw_size += PLT_ENTRY_SIZE;
2965
2966 /* We also need to make an entry in the .rela.plt section. */
2967 htab->relplt->_raw_size += sizeof (Elf32_External_Rela);
2968 }
2969 else
2970 {
2971 h->plt.offset = (bfd_vma) -1;
2972 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2973 }
2974 }
2975 else
2976 {
2977 h->plt.offset = (bfd_vma) -1;
2978 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2979 }
2980
2981 eh = (struct ppc_elf_link_hash_entry *) h;
2982 if (eh->elf.got.refcount > 0)
2983 {
2984 /* Make sure this symbol is output as a dynamic symbol. */
2985 if (eh->elf.dynindx == -1
2986 && (eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
2987 {
2988 if (!bfd_elf32_link_record_dynamic_symbol (info, &eh->elf))
2989 return FALSE;
2990 }
2991
2992 if (eh->tls_mask == (TLS_TLS | TLS_LD)
2993 && !(eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
2994 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
2995 eh->elf.got.offset = (bfd_vma) -1;
2996 else
2997 {
2998 bfd_boolean dyn;
2999 eh->elf.got.offset = htab->got->_raw_size;
3000 if ((eh->tls_mask & TLS_TLS) != 0)
3001 {
3002 if ((eh->tls_mask & TLS_LD) != 0)
3003 htab->got->_raw_size += 8;
3004 if ((eh->tls_mask & TLS_GD) != 0)
3005 htab->got->_raw_size += 8;
3006 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
3007 htab->got->_raw_size += 4;
3008 if ((eh->tls_mask & TLS_DTPREL) != 0)
3009 htab->got->_raw_size += 4;
3010 }
3011 else
3012 htab->got->_raw_size += 4;
3013 dyn = htab->elf.dynamic_sections_created;
3014 if ((info->shared
3015 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
3016 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
3017 || eh->elf.root.type != bfd_link_hash_undefweak))
3018 {
3019 /* All the entries we allocated need relocs. */
3020 htab->relgot->_raw_size
3021 += ((htab->got->_raw_size - eh->elf.got.offset) / 4
3022 * sizeof (Elf32_External_Rela));
3023 /* Except LD only needs one. */
3024 if ((eh->tls_mask & TLS_LD) != 0)
3025 htab->relgot->_raw_size -= sizeof (Elf32_External_Rela);
3026 }
3027 }
3028 }
3029 else
3030 eh->elf.got.offset = (bfd_vma) -1;
3031
3032 if (eh->dyn_relocs == NULL)
3033 return TRUE;
3034
3035 /* In the shared -Bsymbolic case, discard space allocated for
3036 dynamic pc-relative relocs against symbols which turn out to be
3037 defined in regular objects. For the normal shared case, discard
3038 space for relocs that have become local due to symbol visibility
3039 changes. */
3040
3041 if (info->shared)
3042 {
3043 /* Relocs that use pc_count are those that appear on a call insn,
3044 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
3045 generated via assembly. We want calls to protected symbols to
3046 resolve directly to the function rather than going via the plt.
3047 If people want function pointer comparisons to work as expected
3048 then they should avoid writing weird assembly. */
3049 if (SYMBOL_CALLS_LOCAL (info, h))
3050 {
3051 struct ppc_elf_dyn_relocs **pp;
3052
3053 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3054 {
3055 p->count -= p->pc_count;
3056 p->pc_count = 0;
3057 if (p->count == 0)
3058 *pp = p->next;
3059 else
3060 pp = &p->next;
3061 }
3062 }
3063
3064 /* Also discard relocs on undefined weak syms with non-default
3065 visibility. */
3066 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3067 && h->root.type == bfd_link_hash_undefweak)
3068 eh->dyn_relocs = NULL;
3069 }
3070 else if (ELIMINATE_COPY_RELOCS)
3071 {
3072 /* For the non-shared case, discard space for relocs against
3073 symbols which turn out to need copy relocs or are not
3074 dynamic. */
3075
3076 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3077 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3078 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3079 {
3080 /* Make sure this symbol is output as a dynamic symbol.
3081 Undefined weak syms won't yet be marked as dynamic. */
3082 if (h->dynindx == -1
3083 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3084 {
3085 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
3086 return FALSE;
3087 }
3088
3089 /* If that succeeded, we know we'll be keeping all the
3090 relocs. */
3091 if (h->dynindx != -1)
3092 goto keep;
3093 }
3094
3095 eh->dyn_relocs = NULL;
3096
3097 keep: ;
3098 }
3099
3100 /* Finally, allocate space. */
3101 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3102 {
3103 asection *sreloc = elf_section_data (p->sec)->sreloc;
3104 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
3105 }
3106
3107 return TRUE;
3108 }
3109
3110 /* Find any dynamic relocs that apply to read-only sections. */
3111
3112 static bfd_boolean
3113 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
3114 {
3115 struct ppc_elf_dyn_relocs *p;
3116
3117 if (h->root.type == bfd_link_hash_indirect)
3118 return TRUE;
3119
3120 if (h->root.type == bfd_link_hash_warning)
3121 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3122
3123 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3124 {
3125 asection *s = p->sec->output_section;
3126
3127 if (s != NULL
3128 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
3129 == (SEC_READONLY | SEC_ALLOC)))
3130 {
3131 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
3132
3133 /* Not an error, just cut short the traversal. */
3134 return FALSE;
3135 }
3136 }
3137 return TRUE;
3138 }
3139
3140 /* Set the sizes of the dynamic sections. */
3141
3142 static bfd_boolean
3143 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3144 struct bfd_link_info *info)
3145 {
3146 struct ppc_elf_link_hash_table *htab;
3147 asection *s;
3148 bfd_boolean relocs;
3149 bfd *ibfd;
3150
3151 #ifdef DEBUG
3152 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
3153 #endif
3154
3155 htab = ppc_elf_hash_table (info);
3156 BFD_ASSERT (htab->elf.dynobj != NULL);
3157
3158 if (elf_hash_table (info)->dynamic_sections_created)
3159 {
3160 /* Set the contents of the .interp section to the interpreter. */
3161 if (info->executable)
3162 {
3163 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
3164 BFD_ASSERT (s != NULL);
3165 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3166 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3167 }
3168 }
3169
3170 if (htab->tlsld_got.refcount > 0)
3171 {
3172 htab->tlsld_got.offset = htab->got->_raw_size;
3173 htab->got->_raw_size += 8;
3174 if (info->shared)
3175 htab->relgot->_raw_size += sizeof (Elf32_External_Rela);
3176 }
3177 else
3178 htab->tlsld_got.offset = (bfd_vma) -1;
3179
3180 /* Set up .got offsets for local syms, and space for local dynamic
3181 relocs. */
3182 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3183 {
3184 bfd_signed_vma *local_got;
3185 bfd_signed_vma *end_local_got;
3186 char *lgot_masks;
3187 bfd_size_type locsymcount;
3188 Elf_Internal_Shdr *symtab_hdr;
3189 asection *srel;
3190
3191 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
3192 continue;
3193
3194 for (s = ibfd->sections; s != NULL; s = s->next)
3195 {
3196 struct ppc_elf_dyn_relocs *p;
3197
3198 for (p = ((struct ppc_elf_dyn_relocs *)
3199 elf_section_data (s)->local_dynrel);
3200 p != NULL;
3201 p = p->next)
3202 {
3203 if (!bfd_is_abs_section (p->sec)
3204 && bfd_is_abs_section (p->sec->output_section))
3205 {
3206 /* Input section has been discarded, either because
3207 it is a copy of a linkonce section or due to
3208 linker script /DISCARD/, so we'll be discarding
3209 the relocs too. */
3210 }
3211 else if (p->count != 0)
3212 {
3213 elf_section_data (p->sec)->sreloc->_raw_size
3214 += p->count * sizeof (Elf32_External_Rela);
3215 if ((p->sec->output_section->flags
3216 & (SEC_READONLY | SEC_ALLOC))
3217 == (SEC_READONLY | SEC_ALLOC))
3218 info->flags |= DF_TEXTREL;
3219 }
3220 }
3221 }
3222
3223 local_got = elf_local_got_refcounts (ibfd);
3224 if (!local_got)
3225 continue;
3226
3227 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3228 locsymcount = symtab_hdr->sh_info;
3229 end_local_got = local_got + locsymcount;
3230 lgot_masks = (char *) end_local_got;
3231 s = htab->got;
3232 srel = htab->relgot;
3233 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3234 if (*local_got > 0)
3235 {
3236 if (*lgot_masks == (TLS_TLS | TLS_LD))
3237 {
3238 /* If just an LD reloc, we'll just use
3239 htab->tlsld_got.offset. */
3240 if (htab->tlsld_got.offset == (bfd_vma) -1)
3241 {
3242 htab->tlsld_got.offset = s->_raw_size;
3243 s->_raw_size += 8;
3244 if (info->shared)
3245 srel->_raw_size += sizeof (Elf32_External_Rela);
3246 }
3247 *local_got = (bfd_vma) -1;
3248 }
3249 else
3250 {
3251 *local_got = s->_raw_size;
3252 if ((*lgot_masks & TLS_TLS) != 0)
3253 {
3254 if ((*lgot_masks & TLS_GD) != 0)
3255 s->_raw_size += 8;
3256 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
3257 s->_raw_size += 4;
3258 if ((*lgot_masks & TLS_DTPREL) != 0)
3259 s->_raw_size += 4;
3260 }
3261 else
3262 s->_raw_size += 4;
3263 if (info->shared)
3264 srel->_raw_size += ((s->_raw_size - *local_got) / 4
3265 * sizeof (Elf32_External_Rela));
3266 }
3267 }
3268 else
3269 *local_got = (bfd_vma) -1;
3270 }
3271
3272 /* Allocate space for global sym dynamic relocs. */
3273 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3274
3275 /* We've now determined the sizes of the various dynamic sections.
3276 Allocate memory for them. */
3277 relocs = FALSE;
3278 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
3279 {
3280 if ((s->flags & SEC_LINKER_CREATED) == 0)
3281 continue;
3282
3283 if (s == htab->plt
3284 || s == htab->got
3285 || (htab->sdata != NULL && s == htab->sdata->section)
3286 || (htab->sdata2 != NULL && s == htab->sdata2->section))
3287 {
3288 /* Strip this section if we don't need it; see the
3289 comment below. */
3290 }
3291 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
3292 {
3293 if (s->_raw_size == 0)
3294 {
3295 /* If we don't need this section, strip it from the
3296 output file. This is mostly to handle .rela.bss and
3297 .rela.plt. We must create both sections in
3298 create_dynamic_sections, because they must be created
3299 before the linker maps input sections to output
3300 sections. The linker does that before
3301 adjust_dynamic_symbol is called, and it is that
3302 function which decides whether anything needs to go
3303 into these sections. */
3304 }
3305 else
3306 {
3307 /* Remember whether there are any relocation sections. */
3308 relocs = TRUE;
3309
3310 /* We use the reloc_count field as a counter if we need
3311 to copy relocs into the output file. */
3312 s->reloc_count = 0;
3313 }
3314 }
3315 else
3316 {
3317 /* It's not one of our sections, so don't allocate space. */
3318 continue;
3319 }
3320
3321 if (s->_raw_size == 0)
3322 {
3323 _bfd_strip_section_from_output (info, s);
3324 continue;
3325 }
3326
3327 /* Allocate memory for the section contents. */
3328 s->contents = bfd_zalloc (htab->elf.dynobj, s->_raw_size);
3329 if (s->contents == NULL)
3330 return FALSE;
3331 }
3332
3333 if (htab->elf.dynamic_sections_created)
3334 {
3335 /* Add some entries to the .dynamic section. We fill in the
3336 values later, in ppc_elf_finish_dynamic_sections, but we
3337 must add the entries now so that we get the correct size for
3338 the .dynamic section. The DT_DEBUG entry is filled in by the
3339 dynamic linker and used by the debugger. */
3340 #define add_dynamic_entry(TAG, VAL) \
3341 bfd_elf32_add_dynamic_entry (info, (TAG), (VAL))
3342
3343 if (info->executable)
3344 {
3345 if (!add_dynamic_entry (DT_DEBUG, 0))
3346 return FALSE;
3347 }
3348
3349 if (htab->plt != NULL && htab->plt->_raw_size != 0)
3350 {
3351 if (!add_dynamic_entry (DT_PLTGOT, 0)
3352 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3353 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3354 || !add_dynamic_entry (DT_JMPREL, 0))
3355 return FALSE;
3356 }
3357
3358 if (relocs)
3359 {
3360 if (!add_dynamic_entry (DT_RELA, 0)
3361 || !add_dynamic_entry (DT_RELASZ, 0)
3362 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3363 return FALSE;
3364 }
3365
3366 /* If any dynamic relocs apply to a read-only section, then we
3367 need a DT_TEXTREL entry. */
3368 if ((info->flags & DF_TEXTREL) == 0)
3369 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
3370 info);
3371
3372 if ((info->flags & DF_TEXTREL) != 0)
3373 {
3374 if (!add_dynamic_entry (DT_TEXTREL, 0))
3375 return FALSE;
3376 }
3377 }
3378 #undef add_dynamic_entry
3379
3380 return TRUE;
3381 }
3382 \f
3383 static bfd_boolean
3384 update_local_sym_info (bfd *abfd,
3385 Elf_Internal_Shdr *symtab_hdr,
3386 unsigned long r_symndx,
3387 int tls_type)
3388 {
3389 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3390 char *local_got_tls_masks;
3391
3392 if (local_got_refcounts == NULL)
3393 {
3394 bfd_size_type size = symtab_hdr->sh_info;
3395
3396 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3397 local_got_refcounts = bfd_zalloc (abfd, size);
3398 if (local_got_refcounts == NULL)
3399 return FALSE;
3400 elf_local_got_refcounts (abfd) = local_got_refcounts;
3401 }
3402
3403 local_got_refcounts[r_symndx] += 1;
3404 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3405 local_got_tls_masks[r_symndx] |= tls_type;
3406 return TRUE;
3407 }
3408
3409 static void
3410 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3411 {
3412 (*_bfd_error_handler)
3413 (_("%s: relocation %s cannot be used when making a shared object"),
3414 bfd_archive_filename (abfd),
3415 ppc_elf_howto_table[r_type]->name);
3416 bfd_set_error (bfd_error_bad_value);
3417 }
3418
3419 /* Look through the relocs for a section during the first phase, and
3420 allocate space in the global offset table or procedure linkage
3421 table. */
3422
3423 static bfd_boolean
3424 ppc_elf_check_relocs (bfd *abfd,
3425 struct bfd_link_info *info,
3426 asection *sec,
3427 const Elf_Internal_Rela *relocs)
3428 {
3429 struct ppc_elf_link_hash_table *htab;
3430 Elf_Internal_Shdr *symtab_hdr;
3431 struct elf_link_hash_entry **sym_hashes;
3432 const Elf_Internal_Rela *rel;
3433 const Elf_Internal_Rela *rel_end;
3434 asection *sreloc;
3435
3436 if (info->relocatable)
3437 return TRUE;
3438
3439 #ifdef DEBUG
3440 fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n",
3441 bfd_get_section_name (abfd, sec),
3442 bfd_archive_filename (abfd));
3443 #endif
3444
3445 /* Initialize howto table if not already done. */
3446 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3447 ppc_elf_howto_init ();
3448
3449 /* Create the linker generated sections all the time so that the
3450 special symbols are created. */
3451 htab = ppc_elf_hash_table (info);
3452 if (htab->sdata == NULL)
3453 {
3454 htab->sdata = ppc_elf_create_linker_section (abfd, info,
3455 LINKER_SECTION_SDATA);
3456 if (htab->sdata == NULL)
3457 return FALSE;
3458 }
3459
3460 if (htab->sdata2 == NULL)
3461 {
3462 htab->sdata2 = ppc_elf_create_linker_section (abfd, info,
3463 LINKER_SECTION_SDATA2);
3464 if (htab->sdata2 == NULL)
3465 return FALSE;
3466 }
3467
3468 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3469 sym_hashes = elf_sym_hashes (abfd);
3470 sreloc = NULL;
3471
3472 rel_end = relocs + sec->reloc_count;
3473 for (rel = relocs; rel < rel_end; rel++)
3474 {
3475 unsigned long r_symndx;
3476 enum elf_ppc_reloc_type r_type;
3477 struct elf_link_hash_entry *h;
3478 int tls_type = 0;
3479
3480 r_symndx = ELF32_R_SYM (rel->r_info);
3481 if (r_symndx < symtab_hdr->sh_info)
3482 h = NULL;
3483 else
3484 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3485
3486 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3487 This shows up in particular in an R_PPC_ADDR32 in the eabi
3488 startup code. */
3489 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3490 {
3491 if (htab->got == NULL)
3492 {
3493 if (htab->elf.dynobj == NULL)
3494 htab->elf.dynobj = abfd;
3495 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3496 return FALSE;
3497 }
3498 }
3499
3500 r_type = ELF32_R_TYPE (rel->r_info);
3501 switch (r_type)
3502 {
3503 case R_PPC_GOT_TLSLD16:
3504 case R_PPC_GOT_TLSLD16_LO:
3505 case R_PPC_GOT_TLSLD16_HI:
3506 case R_PPC_GOT_TLSLD16_HA:
3507 htab->tlsld_got.refcount += 1;
3508 tls_type = TLS_TLS | TLS_LD;
3509 goto dogottls;
3510
3511 case R_PPC_GOT_TLSGD16:
3512 case R_PPC_GOT_TLSGD16_LO:
3513 case R_PPC_GOT_TLSGD16_HI:
3514 case R_PPC_GOT_TLSGD16_HA:
3515 tls_type = TLS_TLS | TLS_GD;
3516 goto dogottls;
3517
3518 case R_PPC_GOT_TPREL16:
3519 case R_PPC_GOT_TPREL16_LO:
3520 case R_PPC_GOT_TPREL16_HI:
3521 case R_PPC_GOT_TPREL16_HA:
3522 if (info->shared)
3523 info->flags |= DF_STATIC_TLS;
3524 tls_type = TLS_TLS | TLS_TPREL;
3525 goto dogottls;
3526
3527 case R_PPC_GOT_DTPREL16:
3528 case R_PPC_GOT_DTPREL16_LO:
3529 case R_PPC_GOT_DTPREL16_HI:
3530 case R_PPC_GOT_DTPREL16_HA:
3531 tls_type = TLS_TLS | TLS_DTPREL;
3532 dogottls:
3533 sec->has_tls_reloc = 1;
3534 /* Fall thru */
3535
3536 /* GOT16 relocations */
3537 case R_PPC_GOT16:
3538 case R_PPC_GOT16_LO:
3539 case R_PPC_GOT16_HI:
3540 case R_PPC_GOT16_HA:
3541 /* This symbol requires a global offset table entry. */
3542 if (htab->got == NULL)
3543 {
3544 if (htab->elf.dynobj == NULL)
3545 htab->elf.dynobj = abfd;
3546 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3547 return FALSE;
3548 }
3549 if (h != NULL)
3550 {
3551 h->got.refcount += 1;
3552 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3553 }
3554 else
3555 /* This is a global offset table entry for a local symbol. */
3556 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3557 return FALSE;
3558 break;
3559
3560 /* Indirect .sdata relocation. */
3561 case R_PPC_EMB_SDAI16:
3562 if (info->shared)
3563 {
3564 bad_shared_reloc (abfd, r_type);
3565 return FALSE;
3566 }
3567 if (!elf_create_pointer_linker_section (abfd, info,
3568 htab->sdata, h, rel))
3569 return FALSE;
3570 break;
3571
3572 /* Indirect .sdata2 relocation. */
3573 case R_PPC_EMB_SDA2I16:
3574 if (info->shared)
3575 {
3576 bad_shared_reloc (abfd, r_type);
3577 return FALSE;
3578 }
3579 if (!elf_create_pointer_linker_section (abfd, info,
3580 htab->sdata2, h, rel))
3581 return FALSE;
3582 break;
3583
3584 case R_PPC_SDAREL16:
3585 case R_PPC_EMB_SDA2REL:
3586 case R_PPC_EMB_SDA21:
3587 case R_PPC_EMB_RELSDA:
3588 case R_PPC_EMB_NADDR32:
3589 case R_PPC_EMB_NADDR16:
3590 case R_PPC_EMB_NADDR16_LO:
3591 case R_PPC_EMB_NADDR16_HI:
3592 case R_PPC_EMB_NADDR16_HA:
3593 if (info->shared)
3594 {
3595 bad_shared_reloc (abfd, r_type);
3596 return FALSE;
3597 }
3598 break;
3599
3600 case R_PPC_PLT32:
3601 case R_PPC_PLTREL24:
3602 case R_PPC_PLTREL32:
3603 case R_PPC_PLT16_LO:
3604 case R_PPC_PLT16_HI:
3605 case R_PPC_PLT16_HA:
3606 #ifdef DEBUG
3607 fprintf (stderr, "Reloc requires a PLT entry\n");
3608 #endif
3609 /* This symbol requires a procedure linkage table entry. We
3610 actually build the entry in finish_dynamic_symbol,
3611 because this might be a case of linking PIC code without
3612 linking in any dynamic objects, in which case we don't
3613 need to generate a procedure linkage table after all. */
3614
3615 if (h == NULL)
3616 {
3617 /* It does not make sense to have a procedure linkage
3618 table entry for a local symbol. */
3619 (*_bfd_error_handler) (_("%s(%s+0x%lx): %s reloc against "
3620 "local symbol"),
3621 bfd_archive_filename (abfd),
3622 sec->name,
3623 (long) rel->r_offset,
3624 ppc_elf_howto_table[r_type]->name);
3625 bfd_set_error (bfd_error_bad_value);
3626 return FALSE;
3627 }
3628
3629 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3630 h->plt.refcount++;
3631 break;
3632
3633 /* The following relocations don't need to propagate the
3634 relocation if linking a shared object since they are
3635 section relative. */
3636 case R_PPC_SECTOFF:
3637 case R_PPC_SECTOFF_LO:
3638 case R_PPC_SECTOFF_HI:
3639 case R_PPC_SECTOFF_HA:
3640 case R_PPC_DTPREL16:
3641 case R_PPC_DTPREL16_LO:
3642 case R_PPC_DTPREL16_HI:
3643 case R_PPC_DTPREL16_HA:
3644 case R_PPC_TOC16:
3645 break;
3646
3647 /* This are just markers. */
3648 case R_PPC_TLS:
3649 case R_PPC_EMB_MRKREF:
3650 case R_PPC_NONE:
3651 case R_PPC_max:
3652 break;
3653
3654 /* These should only appear in dynamic objects. */
3655 case R_PPC_COPY:
3656 case R_PPC_GLOB_DAT:
3657 case R_PPC_JMP_SLOT:
3658 case R_PPC_RELATIVE:
3659 break;
3660
3661 /* These aren't handled yet. We'll report an error later. */
3662 case R_PPC_ADDR30:
3663 case R_PPC_EMB_RELSEC16:
3664 case R_PPC_EMB_RELST_LO:
3665 case R_PPC_EMB_RELST_HI:
3666 case R_PPC_EMB_RELST_HA:
3667 case R_PPC_EMB_BIT_FLD:
3668 break;
3669
3670 /* This refers only to functions defined in the shared library. */
3671 case R_PPC_LOCAL24PC:
3672 break;
3673
3674 /* This relocation describes the C++ object vtable hierarchy.
3675 Reconstruct it for later use during GC. */
3676 case R_PPC_GNU_VTINHERIT:
3677 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3678 return FALSE;
3679 break;
3680
3681 /* This relocation describes which C++ vtable entries are actually
3682 used. Record for later use during GC. */
3683 case R_PPC_GNU_VTENTRY:
3684 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3685 return FALSE;
3686 break;
3687
3688 /* We shouldn't really be seeing these. */
3689 case R_PPC_TPREL32:
3690 if (info->shared)
3691 info->flags |= DF_STATIC_TLS;
3692 goto dodyn;
3693
3694 /* Nor these. */
3695 case R_PPC_DTPMOD32:
3696 case R_PPC_DTPREL32:
3697 goto dodyn;
3698
3699 case R_PPC_TPREL16:
3700 case R_PPC_TPREL16_LO:
3701 case R_PPC_TPREL16_HI:
3702 case R_PPC_TPREL16_HA:
3703 if (info->shared)
3704 info->flags |= DF_STATIC_TLS;
3705 goto dodyn;
3706
3707 /* When creating a shared object, we must copy these
3708 relocs into the output file. We create a reloc
3709 section in dynobj and make room for the reloc. */
3710 case R_PPC_REL24:
3711 case R_PPC_REL14:
3712 case R_PPC_REL14_BRTAKEN:
3713 case R_PPC_REL14_BRNTAKEN:
3714 case R_PPC_REL32:
3715 if (h == NULL
3716 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3717 break;
3718 /* fall through */
3719
3720 case R_PPC_ADDR32:
3721 case R_PPC_ADDR24:
3722 case R_PPC_ADDR16:
3723 case R_PPC_ADDR16_LO:
3724 case R_PPC_ADDR16_HI:
3725 case R_PPC_ADDR16_HA:
3726 case R_PPC_ADDR14:
3727 case R_PPC_ADDR14_BRTAKEN:
3728 case R_PPC_ADDR14_BRNTAKEN:
3729 case R_PPC_UADDR32:
3730 case R_PPC_UADDR16:
3731 if (h != NULL && !info->shared)
3732 {
3733 /* We may need a plt entry if the symbol turns out to be
3734 a function defined in a dynamic object. */
3735 h->plt.refcount++;
3736
3737 /* We may need a copy reloc too. */
3738 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3739 }
3740
3741 dodyn:
3742 /* If we are creating a shared library, and this is a reloc
3743 against a global symbol, or a non PC relative reloc
3744 against a local symbol, then we need to copy the reloc
3745 into the shared library. However, if we are linking with
3746 -Bsymbolic, we do not need to copy a reloc against a
3747 global symbol which is defined in an object we are
3748 including in the link (i.e., DEF_REGULAR is set). At
3749 this point we have not seen all the input files, so it is
3750 possible that DEF_REGULAR is not set now but will be set
3751 later (it is never cleared). In case of a weak definition,
3752 DEF_REGULAR may be cleared later by a strong definition in
3753 a shared library. We account for that possibility below by
3754 storing information in the dyn_relocs field of the hash
3755 table entry. A similar situation occurs when creating
3756 shared libraries and symbol visibility changes render the
3757 symbol local.
3758
3759 If on the other hand, we are creating an executable, we
3760 may need to keep relocations for symbols satisfied by a
3761 dynamic library if we manage to avoid copy relocs for the
3762 symbol. */
3763 if ((info->shared
3764 && (MUST_BE_DYN_RELOC (r_type)
3765 || (h != NULL
3766 && (! info->symbolic
3767 || h->root.type == bfd_link_hash_defweak
3768 || (h->elf_link_hash_flags
3769 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3770 || (ELIMINATE_COPY_RELOCS
3771 && !info->shared
3772 && (sec->flags & SEC_ALLOC) != 0
3773 && h != NULL
3774 && (h->root.type == bfd_link_hash_defweak
3775 || (h->elf_link_hash_flags
3776 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3777 {
3778 struct ppc_elf_dyn_relocs *p;
3779 struct ppc_elf_dyn_relocs **head;
3780
3781 #ifdef DEBUG
3782 fprintf (stderr,
3783 "ppc_elf_check_relocs needs to "
3784 "create relocation for %s\n",
3785 (h && h->root.root.string
3786 ? h->root.root.string : "<unknown>"));
3787 #endif
3788 if (sreloc == NULL)
3789 {
3790 const char *name;
3791
3792 name = (bfd_elf_string_from_elf_section
3793 (abfd,
3794 elf_elfheader (abfd)->e_shstrndx,
3795 elf_section_data (sec)->rel_hdr.sh_name));
3796 if (name == NULL)
3797 return FALSE;
3798
3799 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3800 && strcmp (bfd_get_section_name (abfd, sec),
3801 name + 5) == 0);
3802
3803 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3804 if (sreloc == NULL)
3805 {
3806 flagword flags;
3807
3808 sreloc = bfd_make_section (htab->elf.dynobj, name);
3809 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3810 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3811 if ((sec->flags & SEC_ALLOC) != 0)
3812 flags |= SEC_ALLOC | SEC_LOAD;
3813 if (sreloc == NULL
3814 || ! bfd_set_section_flags (htab->elf.dynobj,
3815 sreloc, flags)
3816 || ! bfd_set_section_alignment (htab->elf.dynobj,
3817 sreloc, 2))
3818 return FALSE;
3819 }
3820 elf_section_data (sec)->sreloc = sreloc;
3821 }
3822
3823 /* If this is a global symbol, we count the number of
3824 relocations we need for this symbol. */
3825 if (h != NULL)
3826 {
3827 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3828 }
3829 else
3830 {
3831 /* Track dynamic relocs needed for local syms too.
3832 We really need local syms available to do this
3833 easily. Oh well. */
3834
3835 asection *s;
3836 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3837 sec, r_symndx);
3838 if (s == NULL)
3839 return FALSE;
3840
3841 head = ((struct ppc_elf_dyn_relocs **)
3842 &elf_section_data (s)->local_dynrel);
3843 }
3844
3845 p = *head;
3846 if (p == NULL || p->sec != sec)
3847 {
3848 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3849 if (p == NULL)
3850 return FALSE;
3851 p->next = *head;
3852 *head = p;
3853 p->sec = sec;
3854 p->count = 0;
3855 p->pc_count = 0;
3856 }
3857
3858 p->count += 1;
3859 if (!MUST_BE_DYN_RELOC (r_type))
3860 p->pc_count += 1;
3861 }
3862
3863 break;
3864 }
3865 }
3866
3867 return TRUE;
3868 }
3869
3870 /* Return the section that should be marked against GC for a given
3871 relocation. */
3872
3873 static asection *
3874 ppc_elf_gc_mark_hook (asection *sec,
3875 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3876 Elf_Internal_Rela *rel,
3877 struct elf_link_hash_entry *h,
3878 Elf_Internal_Sym *sym)
3879 {
3880 if (h != NULL)
3881 {
3882 switch (ELF32_R_TYPE (rel->r_info))
3883 {
3884 case R_PPC_GNU_VTINHERIT:
3885 case R_PPC_GNU_VTENTRY:
3886 break;
3887
3888 default:
3889 switch (h->root.type)
3890 {
3891 case bfd_link_hash_defined:
3892 case bfd_link_hash_defweak:
3893 return h->root.u.def.section;
3894
3895 case bfd_link_hash_common:
3896 return h->root.u.c.p->section;
3897
3898 default:
3899 break;
3900 }
3901 }
3902 }
3903 else
3904 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3905
3906 return NULL;
3907 }
3908
3909 /* Update the got, plt and dynamic reloc reference counts for the
3910 section being removed. */
3911
3912 static bfd_boolean
3913 ppc_elf_gc_sweep_hook (bfd *abfd,
3914 struct bfd_link_info *info,
3915 asection *sec,
3916 const Elf_Internal_Rela *relocs)
3917 {
3918 struct ppc_elf_link_hash_table *htab;
3919 Elf_Internal_Shdr *symtab_hdr;
3920 struct elf_link_hash_entry **sym_hashes;
3921 bfd_signed_vma *local_got_refcounts;
3922 const Elf_Internal_Rela *rel, *relend;
3923
3924 elf_section_data (sec)->local_dynrel = NULL;
3925
3926 htab = ppc_elf_hash_table (info);
3927 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3928 sym_hashes = elf_sym_hashes (abfd);
3929 local_got_refcounts = elf_local_got_refcounts (abfd);
3930
3931 relend = relocs + sec->reloc_count;
3932 for (rel = relocs; rel < relend; rel++)
3933 {
3934 unsigned long r_symndx;
3935 enum elf_ppc_reloc_type r_type;
3936 struct elf_link_hash_entry *h = NULL;
3937
3938 r_symndx = ELF32_R_SYM (rel->r_info);
3939 if (r_symndx >= symtab_hdr->sh_info)
3940 {
3941 struct ppc_elf_dyn_relocs **pp, *p;
3942 struct ppc_elf_link_hash_entry *eh;
3943
3944 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3945 eh = (struct ppc_elf_link_hash_entry *) h;
3946
3947 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3948 if (p->sec == sec)
3949 {
3950 /* Everything must go for SEC. */
3951 *pp = p->next;
3952 break;
3953 }
3954 }
3955
3956 r_type = ELF32_R_TYPE (rel->r_info);
3957 switch (r_type)
3958 {
3959 case R_PPC_GOT_TLSLD16:
3960 case R_PPC_GOT_TLSLD16_LO:
3961 case R_PPC_GOT_TLSLD16_HI:
3962 case R_PPC_GOT_TLSLD16_HA:
3963 htab->tlsld_got.refcount -= 1;
3964 /* Fall thru */
3965
3966 case R_PPC_GOT_TLSGD16:
3967 case R_PPC_GOT_TLSGD16_LO:
3968 case R_PPC_GOT_TLSGD16_HI:
3969 case R_PPC_GOT_TLSGD16_HA:
3970 case R_PPC_GOT_TPREL16:
3971 case R_PPC_GOT_TPREL16_LO:
3972 case R_PPC_GOT_TPREL16_HI:
3973 case R_PPC_GOT_TPREL16_HA:
3974 case R_PPC_GOT_DTPREL16:
3975 case R_PPC_GOT_DTPREL16_LO:
3976 case R_PPC_GOT_DTPREL16_HI:
3977 case R_PPC_GOT_DTPREL16_HA:
3978 case R_PPC_GOT16:
3979 case R_PPC_GOT16_LO:
3980 case R_PPC_GOT16_HI:
3981 case R_PPC_GOT16_HA:
3982 if (h != NULL)
3983 {
3984 if (h->got.refcount > 0)
3985 h->got.refcount--;
3986 }
3987 else if (local_got_refcounts != NULL)
3988 {
3989 if (local_got_refcounts[r_symndx] > 0)
3990 local_got_refcounts[r_symndx]--;
3991 }
3992 break;
3993
3994 case R_PPC_REL24:
3995 case R_PPC_REL14:
3996 case R_PPC_REL14_BRTAKEN:
3997 case R_PPC_REL14_BRNTAKEN:
3998 case R_PPC_REL32:
3999 if (h == NULL
4000 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4001 break;
4002 /* Fall thru */
4003
4004 case R_PPC_ADDR32:
4005 case R_PPC_ADDR24:
4006 case R_PPC_ADDR16:
4007 case R_PPC_ADDR16_LO:
4008 case R_PPC_ADDR16_HI:
4009 case R_PPC_ADDR16_HA:
4010 case R_PPC_ADDR14:
4011 case R_PPC_ADDR14_BRTAKEN:
4012 case R_PPC_ADDR14_BRNTAKEN:
4013 case R_PPC_UADDR32:
4014 case R_PPC_UADDR16:
4015 case R_PPC_PLT32:
4016 case R_PPC_PLTREL24:
4017 case R_PPC_PLT16_LO:
4018 case R_PPC_PLT16_HI:
4019 case R_PPC_PLT16_HA:
4020 if (h != NULL)
4021 {
4022 if (h->plt.refcount > 0)
4023 h->plt.refcount--;
4024 }
4025 break;
4026
4027 default:
4028 break;
4029 }
4030 }
4031 return TRUE;
4032 }
4033
4034 /* Set htab->tls_sec and htab->tls_get_addr. */
4035
4036 bfd_boolean
4037 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4038 {
4039 asection *tls;
4040 struct ppc_elf_link_hash_table *htab;
4041
4042 htab = ppc_elf_hash_table (info);
4043 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4044 FALSE, FALSE, TRUE);
4045
4046 for (tls = obfd->sections; tls != NULL; tls = tls->next)
4047 if ((tls->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4048 == (SEC_THREAD_LOCAL | SEC_LOAD))
4049 break;
4050 htab->tls_sec = tls;
4051
4052 return tls != NULL;
4053 }
4054
4055 /* Run through all the TLS relocs looking for optimization
4056 opportunities. */
4057
4058 bfd_boolean
4059 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4060 struct bfd_link_info *info)
4061 {
4062 bfd *ibfd;
4063 asection *sec;
4064 struct ppc_elf_link_hash_table *htab;
4065
4066 if (info->relocatable || info->shared)
4067 return TRUE;
4068
4069 htab = ppc_elf_hash_table (info);
4070 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4071 {
4072 Elf_Internal_Sym *locsyms = NULL;
4073 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4074
4075 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4076 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4077 {
4078 Elf_Internal_Rela *relstart, *rel, *relend;
4079 int expecting_tls_get_addr;
4080
4081 /* Read the relocations. */
4082 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4083 info->keep_memory);
4084 if (relstart == NULL)
4085 return FALSE;
4086
4087 expecting_tls_get_addr = 0;
4088 relend = relstart + sec->reloc_count;
4089 for (rel = relstart; rel < relend; rel++)
4090 {
4091 enum elf_ppc_reloc_type r_type;
4092 unsigned long r_symndx;
4093 struct elf_link_hash_entry *h = NULL;
4094 char *tls_mask;
4095 char tls_set, tls_clear;
4096 bfd_boolean is_local;
4097
4098 r_symndx = ELF32_R_SYM (rel->r_info);
4099 if (r_symndx >= symtab_hdr->sh_info)
4100 {
4101 struct elf_link_hash_entry **sym_hashes;
4102
4103 sym_hashes = elf_sym_hashes (ibfd);
4104 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4105 while (h->root.type == bfd_link_hash_indirect
4106 || h->root.type == bfd_link_hash_warning)
4107 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4108 }
4109
4110 is_local = FALSE;
4111 if (h == NULL
4112 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
4113 is_local = TRUE;
4114
4115 r_type = ELF32_R_TYPE (rel->r_info);
4116 switch (r_type)
4117 {
4118 case R_PPC_GOT_TLSLD16:
4119 case R_PPC_GOT_TLSLD16_LO:
4120 case R_PPC_GOT_TLSLD16_HI:
4121 case R_PPC_GOT_TLSLD16_HA:
4122 /* These relocs should never be against a symbol
4123 defined in a shared lib. Leave them alone if
4124 that turns out to be the case. */
4125 expecting_tls_get_addr = 0;
4126 htab->tlsld_got.refcount -= 1;
4127 if (!is_local)
4128 continue;
4129
4130 /* LD -> LE */
4131 tls_set = 0;
4132 tls_clear = TLS_LD;
4133 expecting_tls_get_addr = 1;
4134 break;
4135
4136 case R_PPC_GOT_TLSGD16:
4137 case R_PPC_GOT_TLSGD16_LO:
4138 case R_PPC_GOT_TLSGD16_HI:
4139 case R_PPC_GOT_TLSGD16_HA:
4140 if (is_local)
4141 /* GD -> LE */
4142 tls_set = 0;
4143 else
4144 /* GD -> IE */
4145 tls_set = TLS_TLS | TLS_TPRELGD;
4146 tls_clear = TLS_GD;
4147 expecting_tls_get_addr = 1;
4148 break;
4149
4150 case R_PPC_GOT_TPREL16:
4151 case R_PPC_GOT_TPREL16_LO:
4152 case R_PPC_GOT_TPREL16_HI:
4153 case R_PPC_GOT_TPREL16_HA:
4154 expecting_tls_get_addr = 0;
4155 if (is_local)
4156 {
4157 /* IE -> LE */
4158 tls_set = 0;
4159 tls_clear = TLS_TPREL;
4160 break;
4161 }
4162 else
4163 continue;
4164
4165 case R_PPC_REL14:
4166 case R_PPC_REL14_BRTAKEN:
4167 case R_PPC_REL14_BRNTAKEN:
4168 case R_PPC_REL24:
4169 if (expecting_tls_get_addr
4170 && h != NULL
4171 && h == htab->tls_get_addr)
4172 {
4173 if (h->plt.refcount > 0)
4174 h->plt.refcount -= 1;
4175 }
4176 expecting_tls_get_addr = 0;
4177 continue;
4178
4179 default:
4180 expecting_tls_get_addr = 0;
4181 continue;
4182 }
4183
4184 if (h != NULL)
4185 {
4186 if (tls_set == 0)
4187 {
4188 /* We managed to get rid of a got entry. */
4189 if (h->got.refcount > 0)
4190 h->got.refcount -= 1;
4191 }
4192 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4193 }
4194 else
4195 {
4196 Elf_Internal_Sym *sym;
4197 bfd_signed_vma *lgot_refs;
4198 char *lgot_masks;
4199
4200 if (locsyms == NULL)
4201 {
4202 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4203 if (locsyms == NULL)
4204 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4205 symtab_hdr->sh_info,
4206 0, NULL, NULL, NULL);
4207 if (locsyms == NULL)
4208 {
4209 if (elf_section_data (sec)->relocs != relstart)
4210 free (relstart);
4211 return FALSE;
4212 }
4213 }
4214 sym = locsyms + r_symndx;
4215 lgot_refs = elf_local_got_refcounts (ibfd);
4216 if (lgot_refs == NULL)
4217 abort ();
4218 if (tls_set == 0)
4219 {
4220 /* We managed to get rid of a got entry. */
4221 if (lgot_refs[r_symndx] > 0)
4222 lgot_refs[r_symndx] -= 1;
4223 }
4224 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4225 tls_mask = &lgot_masks[r_symndx];
4226 }
4227
4228 *tls_mask |= tls_set;
4229 *tls_mask &= ~tls_clear;
4230 }
4231
4232 if (elf_section_data (sec)->relocs != relstart)
4233 free (relstart);
4234 }
4235
4236 if (locsyms != NULL
4237 && (symtab_hdr->contents != (unsigned char *) locsyms))
4238 {
4239 if (!info->keep_memory)
4240 free (locsyms);
4241 else
4242 symtab_hdr->contents = (unsigned char *) locsyms;
4243 }
4244 }
4245 return TRUE;
4246 }
4247 \f
4248 /* Hook called by the linker routine which adds symbols from an object
4249 file. We use it to put .comm items in .sbss, and not .bss. */
4250
4251 static bfd_boolean
4252 ppc_elf_add_symbol_hook (bfd *abfd,
4253 struct bfd_link_info *info,
4254 const Elf_Internal_Sym *sym,
4255 const char **namep ATTRIBUTE_UNUSED,
4256 flagword *flagsp ATTRIBUTE_UNUSED,
4257 asection **secp,
4258 bfd_vma *valp)
4259 {
4260 if (sym->st_shndx == SHN_COMMON
4261 && !info->relocatable
4262 && sym->st_size <= elf_gp_size (abfd)
4263 && (info->hash->creator == abfd->xvec
4264 || info->hash->creator == abfd->xvec->alternative_target))
4265 {
4266 /* Common symbols less than or equal to -G nn bytes are automatically
4267 put into .sbss. */
4268 struct ppc_elf_link_hash_table *htab;
4269
4270 htab = ppc_elf_hash_table (info);
4271 if (htab->sbss == NULL)
4272 {
4273 flagword flags = SEC_IS_COMMON;
4274
4275 htab->sbss = bfd_make_section_anyway (abfd, ".sbss");
4276 if (htab->sbss == NULL
4277 || ! bfd_set_section_flags (abfd, htab->sbss, flags))
4278 return FALSE;
4279 }
4280
4281 *secp = htab->sbss;
4282 *valp = sym->st_size;
4283 }
4284
4285 return TRUE;
4286 }
4287 \f
4288 /* Finish up dynamic symbol handling. We set the contents of various
4289 dynamic sections here. */
4290
4291 static bfd_boolean
4292 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
4293 struct bfd_link_info *info,
4294 struct elf_link_hash_entry *h,
4295 Elf_Internal_Sym *sym)
4296 {
4297 struct ppc_elf_link_hash_table *htab;
4298
4299 #ifdef DEBUG
4300 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
4301 h->root.root.string);
4302 #endif
4303
4304 htab = ppc_elf_hash_table (info);
4305 BFD_ASSERT (htab->elf.dynobj != NULL);
4306
4307 if (h->plt.offset != (bfd_vma) -1)
4308 {
4309 Elf_Internal_Rela rela;
4310 bfd_byte *loc;
4311 bfd_vma reloc_index;
4312
4313 #ifdef DEBUG
4314 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
4315 #endif
4316
4317 /* This symbol has an entry in the procedure linkage table. Set
4318 it up. */
4319
4320 BFD_ASSERT (h->dynindx != -1);
4321 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
4322
4323 /* We don't need to fill in the .plt. The ppc dynamic linker
4324 will fill it in. */
4325
4326 /* Fill in the entry in the .rela.plt section. */
4327 rela.r_offset = (htab->plt->output_section->vma
4328 + htab->plt->output_offset
4329 + h->plt.offset);
4330 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
4331 rela.r_addend = 0;
4332
4333 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
4334 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
4335 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
4336 loc = (htab->relplt->contents
4337 + reloc_index * sizeof (Elf32_External_Rela));
4338 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4339
4340 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4341 {
4342 /* Mark the symbol as undefined, rather than as defined in
4343 the .plt section. Leave the value alone. */
4344 sym->st_shndx = SHN_UNDEF;
4345 /* If the symbol is weak, we do need to clear the value.
4346 Otherwise, the PLT entry would provide a definition for
4347 the symbol even if the symbol wasn't defined anywhere,
4348 and so the symbol would never be NULL. */
4349 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
4350 == 0)
4351 sym->st_value = 0;
4352 }
4353 }
4354
4355 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4356 {
4357 asection *s;
4358 Elf_Internal_Rela rela;
4359 bfd_byte *loc;
4360
4361 /* This symbols needs a copy reloc. Set it up. */
4362
4363 #ifdef DEBUG
4364 fprintf (stderr, ", copy");
4365 #endif
4366
4367 BFD_ASSERT (h->dynindx != -1);
4368
4369 if (h->size <= elf_gp_size (htab->elf.dynobj))
4370 s = htab->relsbss;
4371 else
4372 s = htab->relbss;
4373 BFD_ASSERT (s != NULL);
4374
4375 rela.r_offset = (h->root.u.def.value
4376 + h->root.u.def.section->output_section->vma
4377 + h->root.u.def.section->output_offset);
4378 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
4379 rela.r_addend = 0;
4380 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4381 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4382 }
4383
4384 #ifdef DEBUG
4385 fprintf (stderr, "\n");
4386 #endif
4387
4388 /* Mark some specially defined symbols as absolute. */
4389 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4390 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
4391 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
4392 sym->st_shndx = SHN_ABS;
4393
4394 return TRUE;
4395 }
4396 \f
4397 /* Finish up the dynamic sections. */
4398
4399 static bfd_boolean
4400 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
4401 struct bfd_link_info *info)
4402 {
4403 asection *sdyn;
4404 struct ppc_elf_link_hash_table *htab;
4405
4406 #ifdef DEBUG
4407 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
4408 #endif
4409
4410 htab = ppc_elf_hash_table (info);
4411 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
4412
4413 if (htab->elf.dynamic_sections_created)
4414 {
4415 Elf32_External_Dyn *dyncon, *dynconend;
4416
4417 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
4418
4419 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4420 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4421 for (; dyncon < dynconend; dyncon++)
4422 {
4423 Elf_Internal_Dyn dyn;
4424 asection *s;
4425
4426 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
4427
4428 switch (dyn.d_tag)
4429 {
4430 case DT_PLTGOT:
4431 s = htab->plt;
4432 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4433 break;
4434
4435 case DT_PLTRELSZ:
4436 dyn.d_un.d_val = htab->relplt->_raw_size;
4437 break;
4438
4439 case DT_JMPREL:
4440 s = htab->relplt;
4441 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4442 break;
4443
4444 default:
4445 continue;
4446 }
4447
4448 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4449 }
4450 }
4451
4452 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
4453 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
4454 if (htab->got)
4455 {
4456 unsigned char *contents = htab->got->contents;
4457 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
4458
4459 if (sdyn == NULL)
4460 bfd_put_32 (output_bfd, 0, contents + 4);
4461 else
4462 bfd_put_32 (output_bfd,
4463 sdyn->output_section->vma + sdyn->output_offset,
4464 contents + 4);
4465
4466 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
4467 }
4468
4469 return TRUE;
4470 }
4471 \f
4472 /* The RELOCATE_SECTION function is called by the ELF backend linker
4473 to handle the relocations for a section.
4474
4475 The relocs are always passed as Rela structures; if the section
4476 actually uses Rel structures, the r_addend field will always be
4477 zero.
4478
4479 This function is responsible for adjust the section contents as
4480 necessary, and (if using Rela relocs and generating a
4481 relocatable output file) adjusting the reloc addend as
4482 necessary.
4483
4484 This function does not have to worry about setting the reloc
4485 address or the reloc symbol index.
4486
4487 LOCAL_SYMS is a pointer to the swapped in local symbols.
4488
4489 LOCAL_SECTIONS is an array giving the section in the input file
4490 corresponding to the st_shndx field of each local symbol.
4491
4492 The global hash table entry for the global symbols can be found
4493 via elf_sym_hashes (input_bfd).
4494
4495 When generating relocatable output, this function must handle
4496 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
4497 going to be the section symbol corresponding to the output
4498 section, which means that the addend must be adjusted
4499 accordingly. */
4500
4501 static bfd_boolean
4502 ppc_elf_relocate_section (bfd *output_bfd,
4503 struct bfd_link_info *info,
4504 bfd *input_bfd,
4505 asection *input_section,
4506 bfd_byte *contents,
4507 Elf_Internal_Rela *relocs,
4508 Elf_Internal_Sym *local_syms,
4509 asection **local_sections)
4510 {
4511 Elf_Internal_Shdr *symtab_hdr;
4512 struct elf_link_hash_entry **sym_hashes;
4513 struct ppc_elf_link_hash_table *htab;
4514 Elf_Internal_Rela *rel;
4515 Elf_Internal_Rela *relend;
4516 Elf_Internal_Rela outrel;
4517 bfd_byte *loc;
4518 asection *sreloc = NULL;
4519 bfd_vma *local_got_offsets;
4520 bfd_boolean ret = TRUE;
4521
4522 #ifdef DEBUG
4523 fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, "
4524 "%ld relocations%s\n",
4525 bfd_archive_filename (input_bfd),
4526 bfd_section_name(input_bfd, input_section),
4527 (long) input_section->reloc_count,
4528 (info->relocatable) ? " (relocatable)" : "");
4529 #endif
4530
4531 if (info->relocatable)
4532 return TRUE;
4533
4534 /* Initialize howto table if not already done. */
4535 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4536 ppc_elf_howto_init ();
4537
4538 htab = ppc_elf_hash_table (info);
4539 local_got_offsets = elf_local_got_offsets (input_bfd);
4540 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4541 sym_hashes = elf_sym_hashes (input_bfd);
4542 rel = relocs;
4543 relend = relocs + input_section->reloc_count;
4544 for (; rel < relend; rel++)
4545 {
4546 enum elf_ppc_reloc_type r_type;
4547 bfd_vma addend;
4548 bfd_reloc_status_type r;
4549 Elf_Internal_Sym *sym;
4550 asection *sec;
4551 struct elf_link_hash_entry *h;
4552 const char *sym_name;
4553 reloc_howto_type *howto;
4554 unsigned long r_symndx;
4555 bfd_vma relocation;
4556 bfd_vma branch_bit, insn, from;
4557 bfd_boolean unresolved_reloc;
4558 bfd_boolean warned;
4559 unsigned int tls_type, tls_mask, tls_gd;
4560
4561 r_type = ELF32_R_TYPE (rel->r_info);
4562 sym = NULL;
4563 sec = NULL;
4564 h = NULL;
4565 unresolved_reloc = FALSE;
4566 warned = FALSE;
4567 r_symndx = ELF32_R_SYM (rel->r_info);
4568 if (r_symndx < symtab_hdr->sh_info)
4569 {
4570 sym = local_syms + r_symndx;
4571 sec = local_sections[r_symndx];
4572 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
4573
4574 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
4575 }
4576 else
4577 {
4578 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4579 while (h->root.type == bfd_link_hash_indirect
4580 || h->root.type == bfd_link_hash_warning)
4581 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4582 sym_name = h->root.root.string;
4583
4584 relocation = 0;
4585 if (h->root.type == bfd_link_hash_defined
4586 || h->root.type == bfd_link_hash_defweak)
4587 {
4588 sec = h->root.u.def.section;
4589 /* Set a flag that will be cleared later if we find a
4590 relocation value for this symbol. output_section
4591 is typically NULL for symbols satisfied by a shared
4592 library. */
4593 if (sec->output_section == NULL)
4594 unresolved_reloc = TRUE;
4595 else
4596 relocation = (h->root.u.def.value
4597 + sec->output_section->vma
4598 + sec->output_offset);
4599 }
4600 else if (h->root.type == bfd_link_hash_undefweak)
4601 ;
4602 else if (!info->executable
4603 && !info->no_undefined
4604 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
4605 ;
4606 else
4607 {
4608 if (! ((*info->callbacks->undefined_symbol)
4609 (info, h->root.root.string, input_bfd, input_section,
4610 rel->r_offset, (!info->shared
4611 || info->no_undefined
4612 || ELF_ST_VISIBILITY (h->other)))))
4613 return FALSE;
4614 warned = TRUE;
4615 }
4616 }
4617
4618 /* TLS optimizations. Replace instruction sequences and relocs
4619 based on information we collected in tls_optimize. We edit
4620 RELOCS so that --emit-relocs will output something sensible
4621 for the final instruction stream. */
4622 tls_mask = 0;
4623 tls_gd = 0;
4624 if (IS_PPC_TLS_RELOC (r_type))
4625 {
4626 if (h != NULL)
4627 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
4628 else if (local_got_offsets != NULL)
4629 {
4630 char *lgot_masks;
4631 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
4632 tls_mask = lgot_masks[r_symndx];
4633 }
4634 }
4635
4636 /* Ensure reloc mapping code below stays sane. */
4637 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
4638 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
4639 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
4640 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
4641 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
4642 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
4643 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
4644 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
4645 abort ();
4646 switch (r_type)
4647 {
4648 default:
4649 break;
4650
4651 case R_PPC_GOT_TPREL16:
4652 case R_PPC_GOT_TPREL16_LO:
4653 if (tls_mask != 0
4654 && (tls_mask & TLS_TPREL) == 0)
4655 {
4656 bfd_vma insn;
4657 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
4658 insn &= 31 << 21;
4659 insn |= 0x3c020000; /* addis 0,2,0 */
4660 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
4661 r_type = R_PPC_TPREL16_HA;
4662 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4663 }
4664 break;
4665
4666 case R_PPC_TLS:
4667 if (tls_mask != 0
4668 && (tls_mask & TLS_TPREL) == 0)
4669 {
4670 bfd_vma insn, rtra;
4671 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4672 if ((insn & ((31 << 26) | (31 << 11)))
4673 == ((31 << 26) | (2 << 11)))
4674 rtra = insn & ((1 << 26) - (1 << 16));
4675 else if ((insn & ((31 << 26) | (31 << 16)))
4676 == ((31 << 26) | (2 << 16)))
4677 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
4678 else
4679 abort ();
4680 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
4681 /* add -> addi. */
4682 insn = 14 << 26;
4683 else if ((insn & (31 << 1)) == 23 << 1
4684 && ((insn & (31 << 6)) < 14 << 6
4685 || ((insn & (31 << 6)) >= 16 << 6
4686 && (insn & (31 << 6)) < 24 << 6)))
4687 /* load and store indexed -> dform. */
4688 insn = (32 | ((insn >> 6) & 31)) << 26;
4689 else if ((insn & (31 << 1)) == 21 << 1
4690 && (insn & (0x1a << 6)) == 0)
4691 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
4692 insn = (((58 | ((insn >> 6) & 4)) << 26)
4693 | ((insn >> 6) & 1));
4694 else if ((insn & (31 << 1)) == 21 << 1
4695 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
4696 /* lwax -> lwa. */
4697 insn = (58 << 26) | 2;
4698 else
4699 abort ();
4700 insn |= rtra;
4701 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4702 r_type = R_PPC_TPREL16_LO;
4703 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4704 /* Was PPC_TLS which sits on insn boundary, now
4705 PPC_TPREL16_LO which is at insn+2. */
4706 rel->r_offset += 2;
4707 }
4708 break;
4709
4710 case R_PPC_GOT_TLSGD16_HI:
4711 case R_PPC_GOT_TLSGD16_HA:
4712 tls_gd = TLS_TPRELGD;
4713 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4714 goto tls_gdld_hi;
4715 break;
4716
4717 case R_PPC_GOT_TLSLD16_HI:
4718 case R_PPC_GOT_TLSLD16_HA:
4719 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4720 {
4721 tls_gdld_hi:
4722 if ((tls_mask & tls_gd) != 0)
4723 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4724 + R_PPC_GOT_TPREL16);
4725 else
4726 {
4727 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
4728 rel->r_offset -= 2;
4729 r_type = R_PPC_NONE;
4730 }
4731 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4732 }
4733 break;
4734
4735 case R_PPC_GOT_TLSGD16:
4736 case R_PPC_GOT_TLSGD16_LO:
4737 tls_gd = TLS_TPRELGD;
4738 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4739 goto tls_get_addr_check;
4740 break;
4741
4742 case R_PPC_GOT_TLSLD16:
4743 case R_PPC_GOT_TLSLD16_LO:
4744 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4745 {
4746 tls_get_addr_check:
4747 if (rel + 1 < relend)
4748 {
4749 enum elf_ppc_reloc_type r_type2;
4750 unsigned long r_symndx2;
4751 struct elf_link_hash_entry *h2;
4752 bfd_vma insn1, insn2;
4753 bfd_vma offset;
4754
4755 /* The next instruction should be a call to
4756 __tls_get_addr. Peek at the reloc to be sure. */
4757 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4758 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4759 if (r_symndx2 < symtab_hdr->sh_info
4760 || (r_type2 != R_PPC_REL14
4761 && r_type2 != R_PPC_REL14_BRTAKEN
4762 && r_type2 != R_PPC_REL14_BRNTAKEN
4763 && r_type2 != R_PPC_REL24
4764 && r_type2 != R_PPC_PLTREL24))
4765 break;
4766
4767 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4768 while (h2->root.type == bfd_link_hash_indirect
4769 || h2->root.type == bfd_link_hash_warning)
4770 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
4771 if (h2 == NULL || h2 != htab->tls_get_addr)
4772 break;
4773
4774 /* OK, it checks out. Replace the call. */
4775 offset = rel[1].r_offset;
4776 insn1 = bfd_get_32 (output_bfd,
4777 contents + rel->r_offset - 2);
4778 if ((tls_mask & tls_gd) != 0)
4779 {
4780 /* IE */
4781 insn1 &= (1 << 26) - 1;
4782 insn1 |= 32 << 26; /* lwz */
4783 insn2 = 0x7c631214; /* add 3,3,2 */
4784 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
4785 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4786 + R_PPC_GOT_TPREL16);
4787 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4788 }
4789 else
4790 {
4791 /* LE */
4792 insn1 = 0x3c620000; /* addis 3,2,0 */
4793 insn2 = 0x38630000; /* addi 3,3,0 */
4794 if (tls_gd == 0)
4795 {
4796 /* Was an LD reloc. */
4797 r_symndx = 0;
4798 rel->r_addend = htab->tls_sec->vma + DTP_OFFSET;
4799 rel[1].r_addend = htab->tls_sec->vma + DTP_OFFSET;
4800 }
4801 r_type = R_PPC_TPREL16_HA;
4802 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4803 rel[1].r_info = ELF32_R_INFO (r_symndx,
4804 R_PPC_TPREL16_LO);
4805 rel[1].r_offset += 2;
4806 }
4807 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
4808 bfd_put_32 (output_bfd, insn2, contents + offset);
4809 if (tls_gd == 0)
4810 {
4811 /* We changed the symbol on an LD reloc. Start over
4812 in order to get h, sym, sec etc. right. */
4813 rel--;
4814 continue;
4815 }
4816 }
4817 }
4818 break;
4819 }
4820
4821 /* Handle other relocations that tweak non-addend part of insn. */
4822 branch_bit = 0;
4823 switch (r_type)
4824 {
4825 default:
4826 break;
4827
4828 /* Branch taken prediction relocations. */
4829 case R_PPC_ADDR14_BRTAKEN:
4830 case R_PPC_REL14_BRTAKEN:
4831 branch_bit = BRANCH_PREDICT_BIT;
4832 /* Fall thru */
4833
4834 /* Branch not taken predicition relocations. */
4835 case R_PPC_ADDR14_BRNTAKEN:
4836 case R_PPC_REL14_BRNTAKEN:
4837 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4838 insn &= ~BRANCH_PREDICT_BIT;
4839 insn |= branch_bit;
4840
4841 from = (rel->r_offset
4842 + input_section->output_offset
4843 + input_section->output_section->vma);
4844
4845 /* Invert 'y' bit if not the default. */
4846 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
4847 insn ^= BRANCH_PREDICT_BIT;
4848
4849 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4850 break;
4851 }
4852
4853 addend = rel->r_addend;
4854 tls_type = 0;
4855 howto = NULL;
4856 if (r_type < R_PPC_max)
4857 howto = ppc_elf_howto_table[r_type];
4858 switch (r_type)
4859 {
4860 default:
4861 (*_bfd_error_handler)
4862 (_("%s: unknown relocation type %d for symbol %s"),
4863 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
4864
4865 bfd_set_error (bfd_error_bad_value);
4866 ret = FALSE;
4867 continue;
4868
4869 case R_PPC_NONE:
4870 case R_PPC_TLS:
4871 case R_PPC_EMB_MRKREF:
4872 case R_PPC_GNU_VTINHERIT:
4873 case R_PPC_GNU_VTENTRY:
4874 continue;
4875
4876 /* GOT16 relocations. Like an ADDR16 using the symbol's
4877 address in the GOT as relocation value instead of the
4878 symbol's value itself. Also, create a GOT entry for the
4879 symbol and put the symbol value there. */
4880 case R_PPC_GOT_TLSGD16:
4881 case R_PPC_GOT_TLSGD16_LO:
4882 case R_PPC_GOT_TLSGD16_HI:
4883 case R_PPC_GOT_TLSGD16_HA:
4884 tls_type = TLS_TLS | TLS_GD;
4885 goto dogot;
4886
4887 case R_PPC_GOT_TLSLD16:
4888 case R_PPC_GOT_TLSLD16_LO:
4889 case R_PPC_GOT_TLSLD16_HI:
4890 case R_PPC_GOT_TLSLD16_HA:
4891 tls_type = TLS_TLS | TLS_LD;
4892 goto dogot;
4893
4894 case R_PPC_GOT_TPREL16:
4895 case R_PPC_GOT_TPREL16_LO:
4896 case R_PPC_GOT_TPREL16_HI:
4897 case R_PPC_GOT_TPREL16_HA:
4898 tls_type = TLS_TLS | TLS_TPREL;
4899 goto dogot;
4900
4901 case R_PPC_GOT_DTPREL16:
4902 case R_PPC_GOT_DTPREL16_LO:
4903 case R_PPC_GOT_DTPREL16_HI:
4904 case R_PPC_GOT_DTPREL16_HA:
4905 tls_type = TLS_TLS | TLS_DTPREL;
4906 goto dogot;
4907
4908 case R_PPC_GOT16:
4909 case R_PPC_GOT16_LO:
4910 case R_PPC_GOT16_HI:
4911 case R_PPC_GOT16_HA:
4912 dogot:
4913 {
4914 /* Relocation is to the entry for this symbol in the global
4915 offset table. */
4916 bfd_vma off;
4917 bfd_vma *offp;
4918 unsigned long indx;
4919
4920 if (htab->got == NULL)
4921 abort ();
4922
4923 indx = 0;
4924 if (tls_type == (TLS_TLS | TLS_LD)
4925 && (h == NULL
4926 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
4927 offp = &htab->tlsld_got.offset;
4928 else if (h != NULL)
4929 {
4930 bfd_boolean dyn;
4931 dyn = htab->elf.dynamic_sections_created;
4932 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
4933 || (info->shared
4934 && SYMBOL_REFERENCES_LOCAL (info, h)))
4935 /* This is actually a static link, or it is a
4936 -Bsymbolic link and the symbol is defined
4937 locally, or the symbol was forced to be local
4938 because of a version file. */
4939 ;
4940 else
4941 {
4942 indx = h->dynindx;
4943 unresolved_reloc = FALSE;
4944 }
4945 offp = &h->got.offset;
4946 }
4947 else
4948 {
4949 if (local_got_offsets == NULL)
4950 abort ();
4951 offp = &local_got_offsets[r_symndx];
4952 }
4953
4954 /* The offset must always be a multiple of 4. We use the
4955 least significant bit to record whether we have already
4956 processed this entry. */
4957 off = *offp;
4958 if ((off & 1) != 0)
4959 off &= ~1;
4960 else
4961 {
4962 unsigned int tls_m = (tls_mask
4963 & (TLS_LD | TLS_GD | TLS_DTPREL
4964 | TLS_TPREL | TLS_TPRELGD));
4965
4966 if (offp == &htab->tlsld_got.offset)
4967 tls_m = TLS_LD;
4968 else if (h == NULL
4969 || !(h->elf_link_hash_flags
4970 & ELF_LINK_HASH_DEF_DYNAMIC))
4971 tls_m &= ~TLS_LD;
4972
4973 /* We might have multiple got entries for this sym.
4974 Initialize them all. */
4975 do
4976 {
4977 int tls_ty = 0;
4978
4979 if ((tls_m & TLS_LD) != 0)
4980 {
4981 tls_ty = TLS_TLS | TLS_LD;
4982 tls_m &= ~TLS_LD;
4983 }
4984 else if ((tls_m & TLS_GD) != 0)
4985 {
4986 tls_ty = TLS_TLS | TLS_GD;
4987 tls_m &= ~TLS_GD;
4988 }
4989 else if ((tls_m & TLS_DTPREL) != 0)
4990 {
4991 tls_ty = TLS_TLS | TLS_DTPREL;
4992 tls_m &= ~TLS_DTPREL;
4993 }
4994 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
4995 {
4996 tls_ty = TLS_TLS | TLS_TPREL;
4997 tls_m = 0;
4998 }
4999
5000 /* Generate relocs for the dynamic linker. */
5001 if ((info->shared || indx != 0)
5002 && (h == NULL
5003 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5004 || h->root.type != bfd_link_hash_undefweak))
5005 {
5006 outrel.r_offset = (htab->got->output_section->vma
5007 + htab->got->output_offset
5008 + off);
5009 outrel.r_addend = 0;
5010 if (tls_ty & (TLS_LD | TLS_GD))
5011 {
5012 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5013 if (tls_ty == (TLS_TLS | TLS_GD))
5014 {
5015 loc = htab->relgot->contents;
5016 loc += (htab->relgot->reloc_count++
5017 * sizeof (Elf32_External_Rela));
5018 bfd_elf32_swap_reloca_out (output_bfd,
5019 &outrel, loc);
5020 outrel.r_offset += 4;
5021 outrel.r_info
5022 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5023 }
5024 }
5025 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5026 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5027 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5028 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5029 else if (indx == 0)
5030 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5031 else
5032 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5033 if (indx == 0)
5034 {
5035 outrel.r_addend += relocation;
5036 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5037 outrel.r_addend -= htab->tls_sec->vma;
5038 }
5039 loc = htab->relgot->contents;
5040 loc += (htab->relgot->reloc_count++
5041 * sizeof (Elf32_External_Rela));
5042 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5043 }
5044
5045 /* Init the .got section contents if we're not
5046 emitting a reloc. */
5047 else
5048 {
5049 bfd_vma value = relocation;
5050
5051 if (tls_ty == (TLS_TLS | TLS_LD))
5052 value = 1;
5053 else if (tls_ty != 0)
5054 {
5055 value -= htab->tls_sec->vma + DTP_OFFSET;
5056 if (tls_ty == (TLS_TLS | TLS_TPREL))
5057 value += DTP_OFFSET - TP_OFFSET;
5058
5059 if (tls_ty == (TLS_TLS | TLS_GD))
5060 {
5061 bfd_put_32 (output_bfd, value,
5062 htab->got->contents + off + 4);
5063 value = 1;
5064 }
5065 }
5066 bfd_put_32 (output_bfd, value,
5067 htab->got->contents + off);
5068 }
5069
5070 off += 4;
5071 if (tls_ty & (TLS_LD | TLS_GD))
5072 off += 4;
5073 }
5074 while (tls_m != 0);
5075
5076 off = *offp;
5077 *offp = off | 1;
5078 }
5079
5080 if (off >= (bfd_vma) -2)
5081 abort ();
5082
5083 if ((tls_type & TLS_TLS) != 0)
5084 {
5085 if (tls_type != (TLS_TLS | TLS_LD))
5086 {
5087 if ((tls_mask & TLS_LD) != 0
5088 && !(h == NULL
5089 || !(h->elf_link_hash_flags
5090 & ELF_LINK_HASH_DEF_DYNAMIC)))
5091 off += 8;
5092 if (tls_type != (TLS_TLS | TLS_GD))
5093 {
5094 if ((tls_mask & TLS_GD) != 0)
5095 off += 8;
5096 if (tls_type != (TLS_TLS | TLS_DTPREL))
5097 {
5098 if ((tls_mask & TLS_DTPREL) != 0)
5099 off += 4;
5100 }
5101 }
5102 }
5103 }
5104
5105 relocation = htab->got->output_offset + off - 4;
5106
5107 /* Addends on got relocations don't make much sense.
5108 x+off@got is actually x@got+off, and since the got is
5109 generated by a hash table traversal, the value in the
5110 got at entry m+n bears little relation to the entry m. */
5111 if (addend != 0)
5112 (*_bfd_error_handler)
5113 (_("%s(%s+0x%lx): non-zero addend on %s reloc against `%s'"),
5114 bfd_archive_filename (input_bfd),
5115 bfd_get_section_name (input_bfd, input_section),
5116 (long) rel->r_offset,
5117 howto->name,
5118 sym_name);
5119 }
5120 break;
5121
5122 /* Relocations that need no special processing. */
5123 case R_PPC_LOCAL24PC:
5124 /* It makes no sense to point a local relocation
5125 at a symbol not in this object. */
5126 if (unresolved_reloc)
5127 {
5128 if (! (*info->callbacks->undefined_symbol) (info,
5129 h->root.root.string,
5130 input_bfd,
5131 input_section,
5132 rel->r_offset,
5133 TRUE))
5134 return FALSE;
5135 continue;
5136 }
5137 break;
5138
5139 case R_PPC_DTPREL16:
5140 case R_PPC_DTPREL16_LO:
5141 case R_PPC_DTPREL16_HI:
5142 case R_PPC_DTPREL16_HA:
5143 addend -= htab->tls_sec->vma + DTP_OFFSET;
5144 break;
5145
5146 /* Relocations that may need to be propagated if this is a shared
5147 object. */
5148 case R_PPC_TPREL16:
5149 case R_PPC_TPREL16_LO:
5150 case R_PPC_TPREL16_HI:
5151 case R_PPC_TPREL16_HA:
5152 addend -= htab->tls_sec->vma + TP_OFFSET;
5153 /* The TPREL16 relocs shouldn't really be used in shared
5154 libs as they will result in DT_TEXTREL being set, but
5155 support them anyway. */
5156 goto dodyn;
5157
5158 case R_PPC_TPREL32:
5159 addend -= htab->tls_sec->vma + TP_OFFSET;
5160 goto dodyn;
5161
5162 case R_PPC_DTPREL32:
5163 addend -= htab->tls_sec->vma + DTP_OFFSET;
5164 goto dodyn;
5165
5166 case R_PPC_DTPMOD32:
5167 relocation = 1;
5168 addend = 0;
5169 goto dodyn;
5170
5171 case R_PPC_REL24:
5172 case R_PPC_REL32:
5173 case R_PPC_REL14:
5174 case R_PPC_REL14_BRTAKEN:
5175 case R_PPC_REL14_BRNTAKEN:
5176 /* If these relocations are not to a named symbol, they can be
5177 handled right here, no need to bother the dynamic linker. */
5178 if (SYMBOL_REFERENCES_LOCAL (info, h)
5179 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5180 break;
5181 /* fall through */
5182
5183 /* Relocations that always need to be propagated if this is a shared
5184 object. */
5185 case R_PPC_ADDR32:
5186 case R_PPC_ADDR24:
5187 case R_PPC_ADDR16:
5188 case R_PPC_ADDR16_LO:
5189 case R_PPC_ADDR16_HI:
5190 case R_PPC_ADDR16_HA:
5191 case R_PPC_ADDR14:
5192 case R_PPC_ADDR14_BRTAKEN:
5193 case R_PPC_ADDR14_BRNTAKEN:
5194 case R_PPC_UADDR32:
5195 case R_PPC_UADDR16:
5196 /* r_symndx will be zero only for relocs against symbols
5197 from removed linkonce sections, or sections discarded by
5198 a linker script. */
5199 dodyn:
5200 if (r_symndx == 0)
5201 break;
5202 /* Fall thru. */
5203
5204 if ((info->shared
5205 && (h == NULL
5206 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5207 || h->root.type != bfd_link_hash_undefweak)
5208 && (MUST_BE_DYN_RELOC (r_type)
5209 || !SYMBOL_CALLS_LOCAL (info, h)))
5210 || (ELIMINATE_COPY_RELOCS
5211 && !info->shared
5212 && (input_section->flags & SEC_ALLOC) != 0
5213 && h != NULL
5214 && h->dynindx != -1
5215 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5216 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5217 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
5218 {
5219 int skip;
5220
5221 #ifdef DEBUG
5222 fprintf (stderr, "ppc_elf_relocate_section needs to "
5223 "create relocation for %s\n",
5224 (h && h->root.root.string
5225 ? h->root.root.string : "<unknown>"));
5226 #endif
5227
5228 /* When generating a shared object, these relocations
5229 are copied into the output file to be resolved at run
5230 time. */
5231 if (sreloc == NULL)
5232 {
5233 const char *name;
5234
5235 name = (bfd_elf_string_from_elf_section
5236 (input_bfd,
5237 elf_elfheader (input_bfd)->e_shstrndx,
5238 elf_section_data (input_section)->rel_hdr.sh_name));
5239 if (name == NULL)
5240 return FALSE;
5241
5242 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
5243 && strcmp (bfd_get_section_name (input_bfd,
5244 input_section),
5245 name + 5) == 0);
5246
5247 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
5248 BFD_ASSERT (sreloc != NULL);
5249 }
5250
5251 skip = 0;
5252
5253 outrel.r_offset =
5254 _bfd_elf_section_offset (output_bfd, info, input_section,
5255 rel->r_offset);
5256 if (outrel.r_offset == (bfd_vma) -1
5257 || outrel.r_offset == (bfd_vma) -2)
5258 skip = (int) outrel.r_offset;
5259 outrel.r_offset += (input_section->output_section->vma
5260 + input_section->output_offset);
5261
5262 if (skip)
5263 memset (&outrel, 0, sizeof outrel);
5264 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
5265 {
5266 unresolved_reloc = FALSE;
5267 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5268 outrel.r_addend = rel->r_addend;
5269 }
5270 else
5271 {
5272 outrel.r_addend = relocation + rel->r_addend;
5273
5274 if (r_type == R_PPC_ADDR32)
5275 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
5276 else
5277 {
5278 long indx;
5279
5280 if (bfd_is_abs_section (sec))
5281 indx = 0;
5282 else if (sec == NULL || sec->owner == NULL)
5283 {
5284 bfd_set_error (bfd_error_bad_value);
5285 return FALSE;
5286 }
5287 else
5288 {
5289 asection *osec;
5290
5291 /* We are turning this relocation into one
5292 against a section symbol. It would be
5293 proper to subtract the symbol's value,
5294 osec->vma, from the emitted reloc addend,
5295 but ld.so expects buggy relocs. */
5296 osec = sec->output_section;
5297 indx = elf_section_data (osec)->dynindx;
5298 BFD_ASSERT (indx > 0);
5299 #ifdef DEBUG
5300 if (indx <= 0)
5301 printf ("indx=%d section=%s flags=%08x name=%s\n",
5302 indx, osec->name, osec->flags,
5303 h->root.root.string);
5304 #endif
5305 }
5306
5307 outrel.r_info = ELF32_R_INFO (indx, r_type);
5308 }
5309 }
5310
5311 loc = sreloc->contents;
5312 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5313 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5314
5315 if (skip == -1)
5316 continue;
5317
5318 /* This reloc will be computed at runtime. We clear the memory
5319 so that it contains predictable value. */
5320 if (! skip
5321 && ((input_section->flags & SEC_ALLOC) != 0
5322 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
5323 {
5324 relocation = howto->pc_relative ? outrel.r_offset : 0;
5325 addend = 0;
5326 break;
5327 }
5328 }
5329 break;
5330
5331 /* Indirect .sdata relocation. */
5332 case R_PPC_EMB_SDAI16:
5333 BFD_ASSERT (htab->sdata != NULL);
5334 relocation
5335 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5336 htab->sdata, h, relocation,
5337 rel, R_PPC_RELATIVE);
5338 break;
5339
5340 /* Indirect .sdata2 relocation. */
5341 case R_PPC_EMB_SDA2I16:
5342 BFD_ASSERT (htab->sdata2 != NULL);
5343 relocation
5344 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5345 htab->sdata2, h, relocation,
5346 rel, R_PPC_RELATIVE);
5347 break;
5348
5349 /* Handle the TOC16 reloc. We want to use the offset within the .got
5350 section, not the actual VMA. This is appropriate when generating
5351 an embedded ELF object, for which the .got section acts like the
5352 AIX .toc section. */
5353 case R_PPC_TOC16: /* phony GOT16 relocations */
5354 BFD_ASSERT (sec != NULL);
5355 BFD_ASSERT (bfd_is_und_section (sec)
5356 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
5357 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)
5358
5359 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
5360 break;
5361
5362 case R_PPC_PLTREL24:
5363 /* Relocation is to the entry for this symbol in the
5364 procedure linkage table. */
5365 BFD_ASSERT (h != NULL);
5366
5367 if (h->plt.offset == (bfd_vma) -1
5368 || htab->plt == NULL)
5369 {
5370 /* We didn't make a PLT entry for this symbol. This
5371 happens when statically linking PIC code, or when
5372 using -Bsymbolic. */
5373 break;
5374 }
5375
5376 unresolved_reloc = FALSE;
5377 relocation = (htab->plt->output_section->vma
5378 + htab->plt->output_offset
5379 + h->plt.offset);
5380 break;
5381
5382 /* Relocate against _SDA_BASE_. */
5383 case R_PPC_SDAREL16:
5384 {
5385 const char *name;
5386 const struct elf_link_hash_entry *sh;
5387
5388 BFD_ASSERT (sec != NULL);
5389 name = bfd_get_section_name (abfd, sec->output_section);
5390 if (! ((strncmp (name, ".sdata", 6) == 0
5391 && (name[6] == 0 || name[6] == '.'))
5392 || (strncmp (name, ".sbss", 5) == 0
5393 && (name[5] == 0 || name[5] == '.'))))
5394 {
5395 (*_bfd_error_handler)
5396 (_("%s: the target (%s) of a %s relocation is "
5397 "in the wrong output section (%s)"),
5398 bfd_archive_filename (input_bfd),
5399 sym_name,
5400 howto->name,
5401 name);
5402 }
5403 sh = htab->sdata->sym_hash;
5404 addend -= (sh->root.u.def.value
5405 + sh->root.u.def.section->output_section->vma
5406 + sh->root.u.def.section->output_offset);
5407 }
5408 break;
5409
5410 /* Relocate against _SDA2_BASE_. */
5411 case R_PPC_EMB_SDA2REL:
5412 {
5413 const char *name;
5414 const struct elf_link_hash_entry *sh;
5415
5416 BFD_ASSERT (sec != NULL);
5417 name = bfd_get_section_name (abfd, sec->output_section);
5418 if (! (strncmp (name, ".sdata2", 7) == 0
5419 || strncmp (name, ".sbss2", 6) == 0))
5420 {
5421 (*_bfd_error_handler)
5422 (_("%s: the target (%s) of a %s relocation is "
5423 "in the wrong output section (%s)"),
5424 bfd_archive_filename (input_bfd),
5425 sym_name,
5426 howto->name,
5427 name);
5428
5429 bfd_set_error (bfd_error_bad_value);
5430 ret = FALSE;
5431 continue;
5432 }
5433 sh = htab->sdata2->sym_hash;
5434 addend -= (sh->root.u.def.value
5435 + sh->root.u.def.section->output_section->vma
5436 + sh->root.u.def.section->output_offset);
5437 }
5438 break;
5439
5440 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
5441 case R_PPC_EMB_SDA21:
5442 case R_PPC_EMB_RELSDA:
5443 {
5444 const char *name;
5445 const struct elf_link_hash_entry *sh;
5446 int reg;
5447
5448 BFD_ASSERT (sec != NULL);
5449 name = bfd_get_section_name (abfd, sec->output_section);
5450 if (((strncmp (name, ".sdata", 6) == 0
5451 && (name[6] == 0 || name[6] == '.'))
5452 || (strncmp (name, ".sbss", 5) == 0
5453 && (name[5] == 0 || name[5] == '.'))))
5454 {
5455 reg = 13;
5456 sh = htab->sdata->sym_hash;
5457 addend -= (sh->root.u.def.value
5458 + sh->root.u.def.section->output_section->vma
5459 + sh->root.u.def.section->output_offset);
5460 }
5461
5462 else if (strncmp (name, ".sdata2", 7) == 0
5463 || strncmp (name, ".sbss2", 6) == 0)
5464 {
5465 reg = 2;
5466 sh = htab->sdata2->sym_hash;
5467 addend -= (sh->root.u.def.value
5468 + sh->root.u.def.section->output_section->vma
5469 + sh->root.u.def.section->output_offset);
5470 }
5471
5472 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
5473 || strcmp (name, ".PPC.EMB.sbss0") == 0)
5474 {
5475 reg = 0;
5476 }
5477
5478 else
5479 {
5480 (*_bfd_error_handler)
5481 (_("%s: the target (%s) of a %s relocation is "
5482 "in the wrong output section (%s)"),
5483 bfd_archive_filename (input_bfd),
5484 sym_name,
5485 howto->name,
5486 name);
5487
5488 bfd_set_error (bfd_error_bad_value);
5489 ret = FALSE;
5490 continue;
5491 }
5492
5493 if (r_type == R_PPC_EMB_SDA21)
5494 { /* fill in register field */
5495 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5496 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
5497 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5498 }
5499 }
5500 break;
5501
5502 /* Relocate against the beginning of the section. */
5503 case R_PPC_SECTOFF:
5504 case R_PPC_SECTOFF_LO:
5505 case R_PPC_SECTOFF_HI:
5506 case R_PPC_SECTOFF_HA:
5507 BFD_ASSERT (sec != NULL);
5508 addend -= sec->output_section->vma;
5509 break;
5510
5511 /* Negative relocations. */
5512 case R_PPC_EMB_NADDR32:
5513 case R_PPC_EMB_NADDR16:
5514 case R_PPC_EMB_NADDR16_LO:
5515 case R_PPC_EMB_NADDR16_HI:
5516 case R_PPC_EMB_NADDR16_HA:
5517 addend -= 2 * relocation;
5518 break;
5519
5520 case R_PPC_COPY:
5521 case R_PPC_GLOB_DAT:
5522 case R_PPC_JMP_SLOT:
5523 case R_PPC_RELATIVE:
5524 case R_PPC_PLT32:
5525 case R_PPC_PLTREL32:
5526 case R_PPC_PLT16_LO:
5527 case R_PPC_PLT16_HI:
5528 case R_PPC_PLT16_HA:
5529 case R_PPC_ADDR30:
5530 case R_PPC_EMB_RELSEC16:
5531 case R_PPC_EMB_RELST_LO:
5532 case R_PPC_EMB_RELST_HI:
5533 case R_PPC_EMB_RELST_HA:
5534 case R_PPC_EMB_BIT_FLD:
5535 (*_bfd_error_handler)
5536 (_("%s: relocation %s is not yet supported for symbol %s."),
5537 bfd_archive_filename (input_bfd),
5538 howto->name,
5539 sym_name);
5540
5541 bfd_set_error (bfd_error_invalid_operation);
5542 ret = FALSE;
5543 continue;
5544 }
5545
5546 /* Do any further special processing. */
5547 switch (r_type)
5548 {
5549 default:
5550 break;
5551
5552 case R_PPC_ADDR16_HA:
5553 case R_PPC_GOT16_HA:
5554 case R_PPC_PLT16_HA:
5555 case R_PPC_SECTOFF_HA:
5556 case R_PPC_TPREL16_HA:
5557 case R_PPC_DTPREL16_HA:
5558 case R_PPC_GOT_TLSGD16_HA:
5559 case R_PPC_GOT_TLSLD16_HA:
5560 case R_PPC_GOT_TPREL16_HA:
5561 case R_PPC_GOT_DTPREL16_HA:
5562 case R_PPC_EMB_NADDR16_HA:
5563 case R_PPC_EMB_RELST_HA:
5564 /* It's just possible that this symbol is a weak symbol
5565 that's not actually defined anywhere. In that case,
5566 'sec' would be NULL, and we should leave the symbol
5567 alone (it will be set to zero elsewhere in the link). */
5568 if (sec != NULL)
5569 /* Add 0x10000 if sign bit in 0:15 is set.
5570 Bits 0:15 are not used. */
5571 addend += 0x8000;
5572 break;
5573 }
5574
5575 #ifdef DEBUG
5576 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
5577 "offset = %ld, addend = %ld\n",
5578 howto->name,
5579 (int) r_type,
5580 sym_name,
5581 r_symndx,
5582 (long) rel->r_offset,
5583 (long) addend);
5584 #endif
5585
5586 if (unresolved_reloc
5587 && !((input_section->flags & SEC_DEBUGGING) != 0
5588 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
5589 {
5590 (*_bfd_error_handler)
5591 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
5592 bfd_archive_filename (input_bfd),
5593 bfd_get_section_name (input_bfd, input_section),
5594 (long) rel->r_offset,
5595 howto->name,
5596 sym_name);
5597 ret = FALSE;
5598 }
5599
5600 r = _bfd_final_link_relocate (howto,
5601 input_bfd,
5602 input_section,
5603 contents,
5604 rel->r_offset,
5605 relocation,
5606 addend);
5607
5608 if (r != bfd_reloc_ok)
5609 {
5610 if (sym_name == NULL)
5611 sym_name = "(null)";
5612 if (r == bfd_reloc_overflow)
5613 {
5614 if (warned)
5615 continue;
5616 if (h != NULL
5617 && h->root.type == bfd_link_hash_undefweak
5618 && howto->pc_relative)
5619 {
5620 /* Assume this is a call protected by other code that
5621 detect the symbol is undefined. If this is the case,
5622 we can safely ignore the overflow. If not, the
5623 program is hosed anyway, and a little warning isn't
5624 going to help. */
5625
5626 continue;
5627 }
5628
5629 if (! (*info->callbacks->reloc_overflow) (info,
5630 sym_name,
5631 howto->name,
5632 rel->r_addend,
5633 input_bfd,
5634 input_section,
5635 rel->r_offset))
5636 return FALSE;
5637 }
5638 else
5639 {
5640 (*_bfd_error_handler)
5641 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
5642 bfd_archive_filename (input_bfd),
5643 bfd_get_section_name (input_bfd, input_section),
5644 (long) rel->r_offset, howto->name, sym_name, (int) r);
5645 ret = FALSE;
5646 }
5647 }
5648 }
5649
5650 #ifdef DEBUG
5651 fprintf (stderr, "\n");
5652 #endif
5653
5654 return ret;
5655 }
5656
5657 static enum elf_reloc_type_class
5658 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
5659 {
5660 switch (ELF32_R_TYPE (rela->r_info))
5661 {
5662 case R_PPC_RELATIVE:
5663 return reloc_class_relative;
5664 case R_PPC_REL24:
5665 case R_PPC_ADDR24:
5666 case R_PPC_JMP_SLOT:
5667 return reloc_class_plt;
5668 case R_PPC_COPY:
5669 return reloc_class_copy;
5670 default:
5671 return reloc_class_normal;
5672 }
5673 }
5674 \f
5675 /* Support for core dump NOTE sections. */
5676
5677 static bfd_boolean
5678 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
5679 {
5680 int offset;
5681 unsigned int raw_size;
5682
5683 switch (note->descsz)
5684 {
5685 default:
5686 return FALSE;
5687
5688 case 268: /* Linux/PPC. */
5689 /* pr_cursig */
5690 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
5691
5692 /* pr_pid */
5693 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
5694
5695 /* pr_reg */
5696 offset = 72;
5697 raw_size = 192;
5698
5699 break;
5700 }
5701
5702 /* Make a ".reg/999" section. */
5703 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
5704 raw_size, note->descpos + offset);
5705 }
5706
5707 static bfd_boolean
5708 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
5709 {
5710 switch (note->descsz)
5711 {
5712 default:
5713 return FALSE;
5714
5715 case 128: /* Linux/PPC elf_prpsinfo. */
5716 elf_tdata (abfd)->core_program
5717 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
5718 elf_tdata (abfd)->core_command
5719 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
5720 }
5721
5722 /* Note that for some reason, a spurious space is tacked
5723 onto the end of the args in some (at least one anyway)
5724 implementations, so strip it off if it exists. */
5725
5726 {
5727 char *command = elf_tdata (abfd)->core_command;
5728 int n = strlen (command);
5729
5730 if (0 < n && command[n - 1] == ' ')
5731 command[n - 1] = '\0';
5732 }
5733
5734 return TRUE;
5735 }
5736 \f
5737 /* Very simple linked list structure for recording apuinfo values. */
5738 typedef struct apuinfo_list
5739 {
5740 struct apuinfo_list *next;
5741 unsigned long value;
5742 }
5743 apuinfo_list;
5744
5745 static apuinfo_list *head;
5746
5747
5748 static void
5749 apuinfo_list_init (void)
5750 {
5751 head = NULL;
5752 }
5753
5754 static void
5755 apuinfo_list_add (unsigned long value)
5756 {
5757 apuinfo_list *entry = head;
5758
5759 while (entry != NULL)
5760 {
5761 if (entry->value == value)
5762 return;
5763 entry = entry->next;
5764 }
5765
5766 entry = bfd_malloc (sizeof (* entry));
5767 if (entry == NULL)
5768 return;
5769
5770 entry->value = value;
5771 entry->next = head;
5772 head = entry;
5773 }
5774
5775 static unsigned
5776 apuinfo_list_length (void)
5777 {
5778 apuinfo_list *entry;
5779 unsigned long count;
5780
5781 for (entry = head, count = 0;
5782 entry;
5783 entry = entry->next)
5784 ++ count;
5785
5786 return count;
5787 }
5788
5789 static inline unsigned long
5790 apuinfo_list_element (unsigned long number)
5791 {
5792 apuinfo_list * entry;
5793
5794 for (entry = head;
5795 entry && number --;
5796 entry = entry->next)
5797 ;
5798
5799 return entry ? entry->value : 0;
5800 }
5801
5802 static void
5803 apuinfo_list_finish (void)
5804 {
5805 apuinfo_list *entry;
5806
5807 for (entry = head; entry;)
5808 {
5809 apuinfo_list *next = entry->next;
5810 free (entry);
5811 entry = next;
5812 }
5813
5814 head = NULL;
5815 }
5816
5817 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
5818 #define APUINFO_LABEL "APUinfo"
5819
5820 /* Scan the input BFDs and create a linked list of
5821 the APUinfo values that will need to be emitted. */
5822
5823 static void
5824 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
5825 {
5826 bfd *ibfd;
5827 asection *asec;
5828 char *buffer;
5829 unsigned num_input_sections;
5830 bfd_size_type output_section_size;
5831 unsigned i;
5832 unsigned num_entries;
5833 unsigned long offset;
5834 unsigned long length;
5835 const char *error_message = NULL;
5836
5837 if (link_info == NULL)
5838 return;
5839
5840 /* Scan the input bfds, looking for apuinfo sections. */
5841 num_input_sections = 0;
5842 output_section_size = 0;
5843
5844 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5845 {
5846 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
5847 if (asec)
5848 {
5849 ++ num_input_sections;
5850 output_section_size += asec->_raw_size;
5851 }
5852 }
5853
5854 /* We need at least one input sections
5855 in order to make merging worthwhile. */
5856 if (num_input_sections < 1)
5857 return;
5858
5859 /* Just make sure that the output section exists as well. */
5860 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
5861 if (asec == NULL)
5862 return;
5863
5864 /* Allocate a buffer for the contents of the input sections. */
5865 buffer = bfd_malloc (output_section_size);
5866 if (buffer == NULL)
5867 return;
5868
5869 offset = 0;
5870 apuinfo_list_init ();
5871
5872 /* Read in the input sections contents. */
5873 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5874 {
5875 unsigned long datum;
5876 char *ptr;
5877
5878 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
5879 if (asec == NULL)
5880 continue;
5881
5882 length = asec->_raw_size;
5883 if (length < 24)
5884 {
5885 error_message = _("corrupt or empty %s section in %s");
5886 goto fail;
5887 }
5888
5889 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
5890 || (bfd_bread (buffer + offset, length, ibfd) != length))
5891 {
5892 error_message = _("unable to read in %s section from %s");
5893 goto fail;
5894 }
5895
5896 /* Process the contents of the section. */
5897 ptr = buffer + offset;
5898 error_message = _("corrupt %s section in %s");
5899
5900 /* Verify the contents of the header. Note - we have to
5901 extract the values this way in order to allow for a
5902 host whose endian-ness is different from the target. */
5903 datum = bfd_get_32 (ibfd, ptr);
5904 if (datum != sizeof APUINFO_LABEL)
5905 goto fail;
5906
5907 datum = bfd_get_32 (ibfd, ptr + 8);
5908 if (datum != 0x2)
5909 goto fail;
5910
5911 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
5912 goto fail;
5913
5914 /* Get the number of bytes used for apuinfo entries. */
5915 datum = bfd_get_32 (ibfd, ptr + 4);
5916 if (datum + 20 != length)
5917 goto fail;
5918
5919 /* Make sure that we do not run off the end of the section. */
5920 if (offset + length > output_section_size)
5921 goto fail;
5922
5923 /* Scan the apuinfo section, building a list of apuinfo numbers. */
5924 for (i = 0; i < datum; i += 4)
5925 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
5926
5927 /* Update the offset. */
5928 offset += length;
5929 }
5930
5931 error_message = NULL;
5932
5933 /* Compute the size of the output section. */
5934 num_entries = apuinfo_list_length ();
5935 output_section_size = 20 + num_entries * 4;
5936
5937 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
5938
5939 if (! bfd_set_section_size (abfd, asec, output_section_size))
5940 ibfd = abfd,
5941 error_message = _("warning: unable to set size of %s section in %s");
5942
5943 fail:
5944 free (buffer);
5945
5946 if (error_message)
5947 (*_bfd_error_handler) (error_message, APUINFO_SECTION_NAME,
5948 bfd_archive_filename (ibfd));
5949 }
5950
5951
5952 /* Prevent the output section from accumulating the input sections'
5953 contents. We have already stored this in our linked list structure. */
5954
5955 static bfd_boolean
5956 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
5957 asection *asec,
5958 bfd_byte *contents ATTRIBUTE_UNUSED)
5959 {
5960 return (apuinfo_list_length ()
5961 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
5962 }
5963
5964
5965 /* Finally we can generate the output section. */
5966
5967 static void
5968 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
5969 {
5970 bfd_byte *buffer;
5971 asection *asec;
5972 unsigned i;
5973 unsigned num_entries;
5974 bfd_size_type length;
5975
5976 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
5977 if (asec == NULL)
5978 return;
5979
5980 if (apuinfo_list_length () == 0)
5981 return;
5982
5983 length = asec->_raw_size;
5984 if (length < 20)
5985 return;
5986
5987 buffer = bfd_malloc (length);
5988 if (buffer == NULL)
5989 {
5990 (*_bfd_error_handler)
5991 (_("failed to allocate space for new APUinfo section."));
5992 return;
5993 }
5994
5995 /* Create the apuinfo header. */
5996 num_entries = apuinfo_list_length ();
5997 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
5998 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
5999 bfd_put_32 (abfd, 0x2, buffer + 8);
6000 strcpy (buffer + 12, APUINFO_LABEL);
6001
6002 length = 20;
6003 for (i = 0; i < num_entries; i++)
6004 {
6005 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
6006 length += 4;
6007 }
6008
6009 if (length != asec->_raw_size)
6010 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
6011
6012 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
6013 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
6014
6015 free (buffer);
6016
6017 apuinfo_list_finish ();
6018 }
6019
6020 /* Add extra PPC sections -- Note, for now, make .sbss2 and
6021 .PPC.EMB.sbss0 a normal section, and not a bss section so
6022 that the linker doesn't crater when trying to make more than
6023 2 sections. */
6024
6025 static struct bfd_elf_special_section const ppc_elf_special_sections[]=
6026 {
6027 { ".tags", 0, NULL, 0,
6028 SHT_ORDERED, SHF_ALLOC },
6029 { ".sdata", 0, NULL, 0,
6030 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
6031 { ".sbss", 0, NULL, 0,
6032 SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
6033 { ".sdata2", 0, NULL, 0,
6034 SHT_PROGBITS, SHF_ALLOC },
6035 { ".sbss2", 0, NULL, 0,
6036 SHT_PROGBITS, SHF_ALLOC },
6037 { ".PPC.EMB.apuinfo", 0, NULL, 0,
6038 SHT_NOTE, 0 },
6039 { ".PPC.EMB.sdata0", 0, NULL, 0,
6040 SHT_PROGBITS, SHF_ALLOC },
6041 { ".PPC.EMB.sbss0", 0, NULL, 0,
6042 SHT_PROGBITS, SHF_ALLOC },
6043 { ".plt", 0, NULL, 0,
6044 SHT_NOBITS, 0 },
6045 { NULL, 0, NULL, 0,
6046 0, 0 }
6047 };
6048 \f
6049 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
6050 #define TARGET_LITTLE_NAME "elf32-powerpcle"
6051 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
6052 #define TARGET_BIG_NAME "elf32-powerpc"
6053 #define ELF_ARCH bfd_arch_powerpc
6054 #define ELF_MACHINE_CODE EM_PPC
6055 #ifdef __QNXTARGET__
6056 #define ELF_MAXPAGESIZE 0x1000
6057 #else
6058 #define ELF_MAXPAGESIZE 0x10000
6059 #endif
6060 #define elf_info_to_howto ppc_elf_info_to_howto
6061
6062 #ifdef EM_CYGNUS_POWERPC
6063 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6064 #endif
6065
6066 #ifdef EM_PPC_OLD
6067 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6068 #endif
6069
6070 #define elf_backend_plt_not_loaded 1
6071 #define elf_backend_got_symbol_offset 4
6072 #define elf_backend_can_gc_sections 1
6073 #define elf_backend_can_refcount 1
6074 #define elf_backend_got_header_size 12
6075 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
6076 #define elf_backend_rela_normal 1
6077
6078 #define bfd_elf32_mkobject ppc_elf_mkobject
6079 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
6080 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
6081 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
6082 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
6083 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
6084
6085 #define elf_backend_object_p ppc_elf_object_p
6086 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
6087 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
6088 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
6089 #define elf_backend_relocate_section ppc_elf_relocate_section
6090 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
6091 #define elf_backend_check_relocs ppc_elf_check_relocs
6092 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
6093 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
6094 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
6095 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
6096 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
6097 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
6098 #define elf_backend_fake_sections ppc_elf_fake_sections
6099 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
6100 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
6101 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
6102 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
6103 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
6104 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
6105 #define elf_backend_final_write_processing ppc_elf_final_write_processing
6106 #define elf_backend_write_section ppc_elf_write_section
6107 #define elf_backend_special_sections ppc_elf_special_sections
6108
6109 #include "elf32-target.h"