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[deliverable/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 /* Phony reloc to handle branch stubs. */
1538 HOWTO (R_PPC_RELAX32, /* type */
1539 0, /* rightshift */
1540 0, /* size */
1541 0, /* bitsize */
1542 FALSE, /* pc_relative */
1543 0, /* bitpos */
1544 complain_overflow_dont, /* complain_on_overflow */
1545 bfd_elf_generic_reloc, /* special_function */
1546 "R_PPC_RELAX32", /* 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 hierarchy. */
1553 HOWTO (R_PPC_GNU_VTINHERIT, /* 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_VTINHERIT", /* name */
1562 FALSE, /* partial_inplace */
1563 0, /* src_mask */
1564 0, /* dst_mask */
1565 FALSE), /* pcrel_offset */
1566
1567 /* GNU extension to record C++ vtable member usage. */
1568 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1569 0, /* rightshift */
1570 0, /* size (0 = byte, 1 = short, 2 = long) */
1571 0, /* bitsize */
1572 FALSE, /* pc_relative */
1573 0, /* bitpos */
1574 complain_overflow_dont, /* complain_on_overflow */
1575 NULL, /* special_function */
1576 "R_PPC_GNU_VTENTRY", /* name */
1577 FALSE, /* partial_inplace */
1578 0, /* src_mask */
1579 0, /* dst_mask */
1580 FALSE), /* pcrel_offset */
1581
1582 /* Phony reloc to handle AIX style TOC entries. */
1583 HOWTO (R_PPC_TOC16, /* type */
1584 0, /* rightshift */
1585 1, /* size (0 = byte, 1 = short, 2 = long) */
1586 16, /* bitsize */
1587 FALSE, /* pc_relative */
1588 0, /* bitpos */
1589 complain_overflow_signed, /* complain_on_overflow */
1590 bfd_elf_generic_reloc, /* special_function */
1591 "R_PPC_TOC16", /* name */
1592 FALSE, /* partial_inplace */
1593 0, /* src_mask */
1594 0xffff, /* dst_mask */
1595 FALSE), /* pcrel_offset */
1596 };
1597 \f
1598 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1599
1600 static void
1601 ppc_elf_howto_init (void)
1602 {
1603 unsigned int i, type;
1604
1605 for (i = 0;
1606 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1607 i++)
1608 {
1609 type = ppc_elf_howto_raw[i].type;
1610 if (type >= (sizeof (ppc_elf_howto_table)
1611 / sizeof (ppc_elf_howto_table[0])))
1612 abort ();
1613 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1614 }
1615 }
1616 \f
1617 static bfd_reloc_status_type
1618 ppc_elf_install_value (bfd *abfd, bfd_byte *hit_addr, bfd_vma v, unsigned int r_type)
1619 {
1620 bfd_vma t0, t1;
1621 #ifdef BFD_HOST_U_64_BIT
1622 BFD_HOST_U_64_BIT val = (BFD_HOST_U_64_BIT) v;
1623 #else
1624 bfd_vma val = v;
1625 #endif
1626
1627 switch (r_type)
1628 {
1629 case R_PPC_RELAX32:
1630 /* Do stuff here. */
1631 t0 = bfd_get_32 (abfd, hit_addr);
1632 t1 = bfd_get_32 (abfd, hit_addr + 4);
1633
1634 /* We're clearing the bits for R_PPC_ADDR16_HA
1635 and R_PPC_ADDR16_LO here. */
1636 t0 &= ~(0xffff);
1637 t1 &= ~(0xffff);
1638
1639 /* t0 is HA, t1 is lo */
1640 t0 |= ((val + 0x8000) >> 16) & 0xffff;
1641 /* t0 |= (((val >> 16) + ((val & 0x8000) ? 1 : 0)) & 0xffff); */
1642 t1 |= (val & 0xffff);
1643
1644 bfd_put_32 (abfd, t0, hit_addr);
1645 bfd_put_32 (abfd, t1, hit_addr + 4);
1646 break;
1647
1648 case R_PPC_REL24:
1649 t0 = bfd_get_32 (abfd, hit_addr);
1650 t0 &= ~(0x3fffffc);
1651 t0 |= (val & 0x3fffffc);
1652 bfd_put_32 (abfd, t0, hit_addr);
1653 break;
1654
1655 case R_PPC_REL14:
1656 case R_PPC_REL14_BRTAKEN:
1657 case R_PPC_REL14_BRNTAKEN:
1658 t0 = bfd_get_32 (abfd, hit_addr);
1659 t0 &= ~(0xfffc);
1660 t0 |= (val & 0xfffc);
1661 bfd_put_32 (abfd, t0, hit_addr);
1662 break;
1663
1664 case R_PPC_LOCAL24PC:
1665 case R_PPC_PLTREL24:
1666 t0 = bfd_get_32 (abfd, hit_addr);
1667 t0 &= ~(0x3fffffc);
1668 t0 |= (val & 0x3fffffc);
1669 bfd_put_32 (abfd, t0, hit_addr);
1670 break;
1671
1672 default:
1673 return bfd_reloc_notsupported;
1674 }
1675
1676 return bfd_reloc_ok;
1677 }
1678
1679 static const bfd_byte shared_stub_entry[] =
1680 {
1681 0x48, 0x00, 0x00, 0x24, /* b .+36 */
1682 0x7c, 0x08, 0x02, 0xa6, /* mflr 0 */
1683 0x42, 0x9f, 0x00, 0x05, /* bcl 20, 31, .Lxxx */
1684 0x7d, 0x68, 0x02, 0xa6, /* mflr 11 */
1685 0x3d, 0x60, 0x00, 0x00, /* addis 11, 11, (xxx-.Lxxx)@ha */
1686 0x39, 0x6b, 0x00, 0x18, /* addi 11, 11, (xxx-.Lxxx)@l */
1687 0x7c, 0x08, 0x03, 0xa6, /* mtlr 0 */
1688 0x7d, 0x69, 0x03, 0xa6, /* mtctr 11 */
1689 0x4e, 0x80, 0x04, 0x20, /* bctr */
1690 };
1691
1692 static const bfd_byte stub_entry[] =
1693 {
1694 0x48, 0x00, 0x00, 0x14, /* b .+20 */
1695 0x3d, 0x60, 0x00, 0x00, /* lis 11,xxx@ha */
1696 0x39, 0x6b, 0x00, 0x00, /* addi 11,11,xxx@l */
1697 0x7d, 0x69, 0x03, 0xa6, /* mtctr 11 */
1698 0x4e, 0x80, 0x04, 0x20, /* bctr */
1699 };
1700
1701
1702 static bfd_boolean
1703 ppc_elf_relax_section (bfd *abfd,
1704 asection *isec,
1705 struct bfd_link_info *link_info,
1706 bfd_boolean *again)
1707 {
1708 struct one_fixup
1709 {
1710 struct one_fixup *next;
1711 asection *tsec;
1712 bfd_vma toff;
1713 bfd_vma trampoff;
1714 };
1715
1716 Elf_Internal_Shdr *symtab_hdr;
1717 bfd_byte *contents = NULL;
1718 Elf_Internal_Sym *isymbuf = NULL;
1719 bfd_byte *free_contents = NULL;
1720 Elf_Internal_Rela *internal_relocs = NULL;
1721 Elf_Internal_Rela *irel, *irelend;
1722 Elf_Internal_Rela *free_relocs = NULL;
1723 struct one_fixup *fixups = NULL;
1724 bfd_boolean changed_contents = FALSE;
1725 bfd_boolean changed_relocs = FALSE;
1726 struct ppc_elf_link_hash_table *ppc_info;
1727
1728 /* We never have to do this more than once per input section. */
1729 *again = FALSE;
1730
1731 /* Nothing to do if there are no relocations or there is no need for
1732 the relax finalize pass. */
1733 if ((isec->flags & SEC_RELOC) == 0
1734 || isec->reloc_count == 0
1735 || (link_info->relax_finalizing
1736 && isec->need_finalize_relax == 0))
1737 return TRUE;
1738
1739 /* If needed, initialize this section's cooked size. */
1740 if (isec->_cooked_size == 0)
1741 isec->_cooked_size = isec->_raw_size;
1742
1743 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1744
1745 /* Get a copy of the native relocations. */
1746 internal_relocs
1747 = _bfd_elf_link_read_relocs (abfd, isec, (PTR) NULL,
1748 (Elf_Internal_Rela *) NULL,
1749 link_info->keep_memory);
1750 if (internal_relocs == NULL)
1751 goto error_return;
1752 if (! link_info->keep_memory)
1753 free_relocs = internal_relocs;
1754
1755 ppc_info = ppc_elf_hash_table (link_info);
1756 irelend = internal_relocs + isec->reloc_count;
1757
1758 /* Get the section contents. */
1759 /* Get cached copy if it exists. */
1760 if (elf_section_data (isec)->this_hdr.contents != NULL)
1761 contents = elf_section_data (isec)->this_hdr.contents;
1762 else
1763 {
1764 /* Go get them off disk. */
1765 contents = bfd_malloc (isec->_raw_size);
1766 if (contents == NULL)
1767 goto error_return;
1768 free_contents = contents;
1769
1770 if (! bfd_get_section_contents (abfd, isec, contents,
1771 (file_ptr) 0, isec->_raw_size))
1772 goto error_return;
1773 }
1774
1775 for (irel = internal_relocs; irel < irelend; irel++)
1776 {
1777 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
1778 bfd_boolean is_branch;
1779 bfd_vma symaddr, reladdr, trampoff, toff, roff;
1780 asection *tsec;
1781 bfd_size_type amt;
1782 struct one_fixup *f;
1783 size_t insn_offset = 0;
1784
1785 switch (r_type)
1786 {
1787 case R_PPC_REL24:
1788 case R_PPC_LOCAL24PC:
1789 case R_PPC_REL14:
1790 case R_PPC_REL14_BRTAKEN:
1791 case R_PPC_REL14_BRNTAKEN:
1792 case R_PPC_PLTREL24:
1793 if (link_info->relax_finalizing)
1794 continue;
1795 is_branch = TRUE;
1796 break;
1797
1798 default:
1799 continue;
1800 }
1801
1802 /* Get the value of the symbol referred to by the reloc. */
1803 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1804 {
1805 /* A local symbol. */
1806 Elf_Internal_Sym *isym;
1807
1808 /* Read this BFD's local symbols. */
1809 if (isymbuf == NULL)
1810 {
1811 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1812 if (isymbuf == NULL)
1813 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1814 symtab_hdr->sh_info, 0,
1815 NULL, NULL, NULL);
1816 if (isymbuf == 0)
1817 goto error_return;
1818 }
1819 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1820 if (isym->st_shndx == SHN_UNDEF)
1821 continue; /* We can't do anthing with undefined symbols. */
1822 else if (isym->st_shndx == SHN_ABS)
1823 tsec = bfd_abs_section_ptr;
1824 else if (isym->st_shndx == SHN_COMMON)
1825 tsec = bfd_com_section_ptr;
1826 else
1827 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1828
1829 toff = isym->st_value;
1830 }
1831 else
1832 {
1833 /* Need dynamic symbol handling. */
1834 unsigned long indx;
1835 struct elf_link_hash_entry *h;
1836
1837 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1838 h = elf_sym_hashes (abfd)[indx];
1839
1840 while (h->root.type == bfd_link_hash_indirect
1841 || h->root.type == bfd_link_hash_warning)
1842 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1843
1844 if (r_type == R_PPC_PLTREL24)
1845 {
1846 Elf_Internal_Sym *isym;
1847
1848 if (h->plt.offset == (bfd_vma) -1
1849 || ppc_info->plt == NULL)
1850 {
1851
1852 /* Read this BFD's local symbols. */
1853 if (isymbuf == NULL)
1854 {
1855 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1856 if (isymbuf == NULL)
1857 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1858 symtab_hdr->sh_info, 0,
1859 NULL, NULL, NULL);
1860 if (isymbuf == 0)
1861 goto error_return;
1862 }
1863 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1864
1865 if (isym->st_shndx == SHN_UNDEF)
1866 continue; /* We can't do anthing with undefined symbols. */
1867 else if (isym->st_shndx == SHN_ABS)
1868 tsec = bfd_abs_section_ptr;
1869 else if (isym->st_shndx == SHN_COMMON)
1870 tsec = bfd_com_section_ptr;
1871 else
1872 tsec = h->root.u.def.section;
1873
1874 toff = h->root.u.def.value;
1875 }
1876 else
1877 {
1878 tsec = ppc_info->plt;
1879 toff = h->plt.offset;
1880 }
1881 }
1882 else if (h->root.type == bfd_link_hash_undefined
1883 || h->root.type == bfd_link_hash_undefweak)
1884 continue;
1885
1886 else
1887 {
1888 tsec = h->root.u.def.section;
1889 toff = h->root.u.def.value;
1890 }
1891 }
1892
1893 if (tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
1894 toff = _bfd_merged_section_offset (abfd, &tsec,
1895 elf_section_data (tsec)->sec_info,
1896 toff + irel->r_addend,
1897 (bfd_vma) 0);
1898 else
1899 toff += irel->r_addend;
1900
1901 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
1902
1903 roff = irel->r_offset;
1904
1905 if (is_branch)
1906 {
1907 bfd_vma max_branch_offset;
1908
1909 reladdr = (isec->output_section->vma
1910 + isec->output_offset
1911 + roff) & (bfd_vma) -4;
1912
1913 /* If the branch is in range, no need to do anything. */
1914 max_branch_offset = 1 << 25;
1915 if (r_type != R_PPC_REL24
1916 && r_type != R_PPC_LOCAL24PC
1917 && r_type != R_PPC_PLTREL24)
1918 max_branch_offset = 1 << 15;
1919
1920 if ((bfd_vma) (symaddr - reladdr) + max_branch_offset <= 2 * max_branch_offset)
1921 continue;
1922
1923 /* If the branch and target are in the same section, you have
1924 no hope. We'll error out later. */
1925 if (tsec == isec)
1926 continue;
1927
1928 /* Look for an existing fixup to this address. */
1929 for (f = fixups; f ; f = f->next)
1930 if (f->tsec == tsec && f->toff == toff)
1931 break;
1932
1933 if (f == NULL)
1934 {
1935 size_t size;
1936
1937 if (link_info->shared
1938 || tsec == ppc_info->plt
1939 || r_type == R_PPC_LOCAL24PC)
1940 {
1941 size = sizeof (shared_stub_entry);
1942 insn_offset = 16;
1943 }
1944 else
1945 {
1946 size = sizeof (stub_entry);
1947 insn_offset = 4;
1948 }
1949
1950 /* Resize the current section to make room for the new branch. */
1951 trampoff = (isec->_cooked_size + 3) & (bfd_vma) - 4;
1952 amt = trampoff + size;
1953 contents = (bfd_byte *) bfd_realloc (contents, amt);
1954 if (contents == NULL)
1955 abort ();
1956
1957 isec->_cooked_size = amt;
1958
1959 if (link_info->shared
1960 || tsec == ppc_info->plt
1961 || r_type == R_PPC_LOCAL24PC)
1962 {
1963 memcpy (contents + trampoff, shared_stub_entry, size);
1964 /* Hijack the old relocation. Since we need two
1965 relocations for this use a "composite" reloc. */
1966 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1967 R_PPC_RELAX32);
1968 irel->r_offset = trampoff + insn_offset;
1969 }
1970 else
1971 {
1972 memcpy (contents + trampoff, stub_entry, size);
1973 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1974 R_PPC_RELAX32);
1975 irel->r_offset = trampoff + insn_offset;
1976 }
1977
1978 /* Record the fixup so we don't do it again this section. */
1979 f = (struct one_fixup *)
1980 bfd_malloc ((bfd_size_type) sizeof (*f));
1981 f->next = fixups;
1982 f->tsec = tsec;
1983 f->toff = toff;
1984 f->trampoff = trampoff;
1985 fixups = f;
1986 }
1987 else
1988 {
1989 /* Nop out the reloc, since we're finalizing things here. */
1990 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
1991 }
1992
1993 /* Fix up the existing branch to hit the trampoline. Hope like
1994 hell this doesn't overflow too. */
1995 if (ppc_elf_install_value (abfd, contents + roff,
1996 f->trampoff - (roff & (bfd_vma) -3) + 4,
1997 r_type) != bfd_reloc_ok)
1998 abort ();
1999
2000 changed_contents = TRUE;
2001 changed_relocs = TRUE;
2002 }
2003 }
2004
2005 /* Clean up. */
2006 while (fixups)
2007 {
2008 struct one_fixup *f = fixups;
2009 fixups = fixups->next;
2010 free (f);
2011 }
2012 if (isymbuf != NULL
2013 && symtab_hdr->contents != (unsigned char *) isymbuf)
2014 {
2015 if (! link_info->keep_memory)
2016 free (isymbuf);
2017 else
2018 {
2019 /* Cache the symbols for elf_link_input_bfd. */
2020 symtab_hdr->contents = (unsigned char *) isymbuf;
2021 }
2022 }
2023
2024 if (contents != NULL
2025 && elf_section_data (isec)->this_hdr.contents != contents)
2026 {
2027 if (!changed_contents && !link_info->keep_memory)
2028 free (contents);
2029 else
2030 {
2031 /* Cache the section contents for elf_link_input_bfd. */
2032 elf_section_data (isec)->this_hdr.contents = contents;
2033 }
2034 }
2035
2036 if (elf_section_data (isec)->relocs != internal_relocs)
2037 {
2038 if (!changed_relocs)
2039 free (internal_relocs);
2040 else
2041 elf_section_data (isec)->relocs = internal_relocs;
2042 }
2043
2044 if (link_info->relax_finalizing)
2045 isec->need_finalize_relax = 0;
2046
2047 *again = changed_contents || changed_relocs;
2048 return TRUE;
2049
2050 error_return:
2051 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
2052 free (isymbuf);
2053 if (contents != NULL
2054 && elf_section_data (isec)->this_hdr.contents != contents)
2055 free (contents);
2056 if (internal_relocs != NULL
2057 && elf_section_data (isec)->relocs != internal_relocs)
2058 free (internal_relocs);
2059 return FALSE;
2060 }
2061 \f
2062 static reloc_howto_type *
2063 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2064 bfd_reloc_code_real_type code)
2065 {
2066 enum elf_ppc_reloc_type r;
2067
2068 /* Initialize howto table if not already done. */
2069 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2070 ppc_elf_howto_init ();
2071
2072 switch (code)
2073 {
2074 default:
2075 return NULL;
2076
2077 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
2078 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
2079 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
2080 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
2081 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
2082 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
2083 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
2084 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
2085 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
2086 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
2087 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
2088 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
2089 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
2090 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
2091 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
2092 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
2093 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
2094 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
2095 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
2096 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
2097 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
2098 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
2099 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
2100 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
2101 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
2102 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
2103 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
2104 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
2105 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
2106 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
2107 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
2108 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
2109 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
2110 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
2111 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
2112 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
2113 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
2114 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
2115 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
2116 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
2117 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
2118 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
2119 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
2120 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
2121 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
2122 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
2123 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
2124 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
2125 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
2126 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
2127 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
2128 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
2129 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
2130 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
2131 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
2132 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
2133 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
2134 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
2135 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
2136 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
2137 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
2138 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
2139 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
2140 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
2141 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
2142 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
2143 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
2144 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
2145 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
2146 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
2147 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
2148 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
2149 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
2150 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
2151 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
2152 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
2153 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
2154 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
2155 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
2156 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2157 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2158 }
2159
2160 return ppc_elf_howto_table[r];
2161 };
2162
2163 /* Set the howto pointer for a PowerPC ELF reloc. */
2164
2165 static void
2166 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2167 arelent *cache_ptr,
2168 Elf_Internal_Rela *dst)
2169 {
2170 /* Initialize howto table if not already done. */
2171 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2172 ppc_elf_howto_init ();
2173
2174 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2175 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2176 }
2177
2178 /* Handle the R_PPC_ADDR16_HA reloc. */
2179
2180 static bfd_reloc_status_type
2181 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2182 arelent *reloc_entry,
2183 asymbol *symbol,
2184 void *data ATTRIBUTE_UNUSED,
2185 asection *input_section,
2186 bfd *output_bfd,
2187 char **error_message ATTRIBUTE_UNUSED)
2188 {
2189 bfd_vma relocation;
2190
2191 if (output_bfd != NULL)
2192 {
2193 reloc_entry->address += input_section->output_offset;
2194 return bfd_reloc_ok;
2195 }
2196
2197 if (reloc_entry->address > input_section->_cooked_size)
2198 return bfd_reloc_outofrange;
2199
2200 if (bfd_is_com_section (symbol->section))
2201 relocation = 0;
2202 else
2203 relocation = symbol->value;
2204
2205 relocation += symbol->section->output_section->vma;
2206 relocation += symbol->section->output_offset;
2207 relocation += reloc_entry->addend;
2208
2209 reloc_entry->addend += (relocation & 0x8000) << 1;
2210
2211 return bfd_reloc_continue;
2212 }
2213
2214 static bfd_reloc_status_type
2215 ppc_elf_unhandled_reloc (bfd *abfd,
2216 arelent *reloc_entry,
2217 asymbol *symbol,
2218 void *data,
2219 asection *input_section,
2220 bfd *output_bfd,
2221 char **error_message)
2222 {
2223 /* If this is a relocatable link (output_bfd test tells us), just
2224 call the generic function. Any adjustment will be done at final
2225 link time. */
2226 if (output_bfd != NULL)
2227 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2228 input_section, output_bfd, error_message);
2229
2230 if (error_message != NULL)
2231 {
2232 static char buf[60];
2233 sprintf (buf, _("generic linker can't handle %s"),
2234 reloc_entry->howto->name);
2235 *error_message = buf;
2236 }
2237 return bfd_reloc_dangerous;
2238 }
2239
2240 /* Fix bad default arch selected for a 32 bit input bfd when the
2241 default is 64 bit. */
2242
2243 static bfd_boolean
2244 ppc_elf_object_p (bfd *abfd)
2245 {
2246 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2247 {
2248 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2249
2250 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2251 {
2252 /* Relies on arch after 64 bit default being 32 bit default. */
2253 abfd->arch_info = abfd->arch_info->next;
2254 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2255 }
2256 }
2257 return TRUE;
2258 }
2259
2260 /* Function to set whether a module needs the -mrelocatable bit set. */
2261
2262 static bfd_boolean
2263 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2264 {
2265 BFD_ASSERT (!elf_flags_init (abfd)
2266 || elf_elfheader (abfd)->e_flags == flags);
2267
2268 elf_elfheader (abfd)->e_flags = flags;
2269 elf_flags_init (abfd) = TRUE;
2270 return TRUE;
2271 }
2272
2273 /* Merge backend specific data from an object file to the output
2274 object file when linking. */
2275
2276 static bfd_boolean
2277 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2278 {
2279 flagword old_flags;
2280 flagword new_flags;
2281 bfd_boolean error;
2282
2283 /* Check if we have the same endianess. */
2284 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
2285 return FALSE;
2286
2287 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2288 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2289 return TRUE;
2290
2291 new_flags = elf_elfheader (ibfd)->e_flags;
2292 old_flags = elf_elfheader (obfd)->e_flags;
2293 if (!elf_flags_init (obfd))
2294 {
2295 /* First call, no flags set. */
2296 elf_flags_init (obfd) = TRUE;
2297 elf_elfheader (obfd)->e_flags = new_flags;
2298 }
2299
2300 /* Compatible flags are ok. */
2301 else if (new_flags == old_flags)
2302 ;
2303
2304 /* Incompatible flags. */
2305 else
2306 {
2307 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
2308 to be linked with either. */
2309 error = FALSE;
2310 if ((new_flags & EF_PPC_RELOCATABLE) != 0
2311 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
2312 {
2313 error = TRUE;
2314 (*_bfd_error_handler)
2315 (_("%s: compiled with -mrelocatable and linked with "
2316 "modules compiled normally"),
2317 bfd_archive_filename (ibfd));
2318 }
2319 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
2320 && (old_flags & EF_PPC_RELOCATABLE) != 0)
2321 {
2322 error = TRUE;
2323 (*_bfd_error_handler)
2324 (_("%s: compiled normally and linked with "
2325 "modules compiled with -mrelocatable"),
2326 bfd_archive_filename (ibfd));
2327 }
2328
2329 /* The output is -mrelocatable-lib iff both the input files are. */
2330 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
2331 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
2332
2333 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
2334 but each input file is either -mrelocatable or -mrelocatable-lib. */
2335 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
2336 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
2337 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
2338 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
2339
2340 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
2341 any module uses it. */
2342 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
2343
2344 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2345 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2346
2347 /* Warn about any other mismatches. */
2348 if (new_flags != old_flags)
2349 {
2350 error = TRUE;
2351 (*_bfd_error_handler)
2352 (_("%s: uses different e_flags (0x%lx) fields "
2353 "than previous modules (0x%lx)"),
2354 bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
2355 }
2356
2357 if (error)
2358 {
2359 bfd_set_error (bfd_error_bad_value);
2360 return FALSE;
2361 }
2362 }
2363
2364 return TRUE;
2365 }
2366 \f
2367 /* Handle a PowerPC specific section when reading an object file. This
2368 is called when elfcode.h finds a section with an unknown type. */
2369
2370 static bfd_boolean
2371 ppc_elf_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, const char *name)
2372 {
2373 asection *newsect;
2374 flagword flags;
2375
2376 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2377 return FALSE;
2378
2379 newsect = hdr->bfd_section;
2380 flags = bfd_get_section_flags (abfd, newsect);
2381 if (hdr->sh_flags & SHF_EXCLUDE)
2382 flags |= SEC_EXCLUDE;
2383
2384 if (hdr->sh_type == SHT_ORDERED)
2385 flags |= SEC_SORT_ENTRIES;
2386
2387 bfd_set_section_flags (abfd, newsect, flags);
2388 return TRUE;
2389 }
2390 \f
2391 /* Set up any other section flags and such that may be necessary. */
2392
2393 static bfd_boolean
2394 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2395 Elf_Internal_Shdr *shdr,
2396 asection *asect)
2397 {
2398 if ((asect->flags & SEC_EXCLUDE) != 0)
2399 shdr->sh_flags |= SHF_EXCLUDE;
2400
2401 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2402 shdr->sh_type = SHT_ORDERED;
2403
2404 return TRUE;
2405 }
2406 \f
2407 /* Find a linker generated pointer with a given addend and type. */
2408
2409 static elf_linker_section_pointers_t *
2410 elf_find_pointer_linker_section
2411 (elf_linker_section_pointers_t *linker_pointers,
2412 bfd_vma addend,
2413 elf_linker_section_t *lsect)
2414 {
2415 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2416 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2417 return linker_pointers;
2418
2419 return NULL;
2420 }
2421 \f
2422 /* Allocate a pointer to live in a linker created section. */
2423
2424 static bfd_boolean
2425 elf_create_pointer_linker_section (bfd *abfd,
2426 struct bfd_link_info *info,
2427 elf_linker_section_t *lsect,
2428 struct elf_link_hash_entry *h,
2429 const Elf_Internal_Rela *rel)
2430 {
2431 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2432 elf_linker_section_pointers_t *linker_section_ptr;
2433 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2434 bfd_size_type amt;
2435
2436 BFD_ASSERT (lsect != NULL);
2437
2438 /* Is this a global symbol? */
2439 if (h != NULL)
2440 {
2441 struct ppc_elf_link_hash_entry *eh;
2442
2443 /* Has this symbol already been allocated? If so, our work is done. */
2444 eh = (struct ppc_elf_link_hash_entry *) h;
2445 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2446 rel->r_addend,
2447 lsect))
2448 return TRUE;
2449
2450 ptr_linker_section_ptr = &eh->linker_section_pointer;
2451 /* Make sure this symbol is output as a dynamic symbol. */
2452 if (h->dynindx == -1)
2453 {
2454 if (! _bfd_elf_link_record_dynamic_symbol (info, h))
2455 return FALSE;
2456 }
2457
2458 if (lsect->rel_section)
2459 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
2460 }
2461 else
2462 {
2463 /* Allocation of a pointer to a local symbol. */
2464 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2465
2466 /* Allocate a table to hold the local symbols if first time. */
2467 if (!ptr)
2468 {
2469 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2470
2471 amt = num_symbols;
2472 amt *= sizeof (elf_linker_section_pointers_t *);
2473 ptr = bfd_zalloc (abfd, amt);
2474
2475 if (!ptr)
2476 return FALSE;
2477
2478 elf_local_ptr_offsets (abfd) = ptr;
2479 }
2480
2481 /* Has this symbol already been allocated? If so, our work is done. */
2482 if (elf_find_pointer_linker_section (ptr[r_symndx],
2483 rel->r_addend,
2484 lsect))
2485 return TRUE;
2486
2487 ptr_linker_section_ptr = &ptr[r_symndx];
2488
2489 if (info->shared)
2490 {
2491 /* If we are generating a shared object, we need to
2492 output a R_<xxx>_RELATIVE reloc so that the
2493 dynamic linker can adjust this GOT entry. */
2494 BFD_ASSERT (lsect->rel_section != NULL);
2495 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
2496 }
2497 }
2498
2499 /* Allocate space for a pointer in the linker section, and allocate
2500 a new pointer record from internal memory. */
2501 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2502 amt = sizeof (elf_linker_section_pointers_t);
2503 linker_section_ptr = bfd_alloc (abfd, amt);
2504
2505 if (!linker_section_ptr)
2506 return FALSE;
2507
2508 linker_section_ptr->next = *ptr_linker_section_ptr;
2509 linker_section_ptr->addend = rel->r_addend;
2510 linker_section_ptr->lsect = lsect;
2511 linker_section_ptr->written_address_p = FALSE;
2512 *ptr_linker_section_ptr = linker_section_ptr;
2513
2514 linker_section_ptr->offset = lsect->section->_raw_size;
2515 lsect->section->_raw_size += 4;
2516
2517 #ifdef DEBUG
2518 fprintf (stderr,
2519 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2520 lsect->name, (long) linker_section_ptr->offset,
2521 (long) lsect->section->_raw_size);
2522 #endif
2523
2524 return TRUE;
2525 }
2526 \f
2527 #define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR)
2528
2529 /* Fill in the address for a pointer generated in a linker section. */
2530
2531 static bfd_vma
2532 elf_finish_pointer_linker_section (bfd *output_bfd,
2533 bfd *input_bfd,
2534 struct bfd_link_info *info,
2535 elf_linker_section_t *lsect,
2536 struct elf_link_hash_entry *h,
2537 bfd_vma relocation,
2538 const Elf_Internal_Rela *rel,
2539 int relative_reloc)
2540 {
2541 elf_linker_section_pointers_t *linker_section_ptr;
2542
2543 BFD_ASSERT (lsect != NULL);
2544
2545 if (h != NULL)
2546 {
2547 /* Handle global symbol. */
2548 struct ppc_elf_link_hash_entry *eh;
2549
2550 eh = (struct ppc_elf_link_hash_entry *) h;
2551 linker_section_ptr
2552 = elf_find_pointer_linker_section (eh->linker_section_pointer,
2553 rel->r_addend,
2554 lsect);
2555
2556 BFD_ASSERT (linker_section_ptr != NULL);
2557
2558 if (! elf_hash_table (info)->dynamic_sections_created
2559 || (info->shared
2560 && info->symbolic
2561 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
2562 {
2563 /* This is actually a static link, or it is a
2564 -Bsymbolic link and the symbol is defined
2565 locally. We must initialize this entry in the
2566 global section.
2567
2568 When doing a dynamic link, we create a .rela.<xxx>
2569 relocation entry to initialize the value. This
2570 is done in the finish_dynamic_symbol routine. */
2571 if (!linker_section_ptr->written_address_p)
2572 {
2573 linker_section_ptr->written_address_p = TRUE;
2574 bfd_put_ptr (output_bfd,
2575 relocation + linker_section_ptr->addend,
2576 (lsect->section->contents
2577 + linker_section_ptr->offset));
2578 }
2579 }
2580 }
2581 else
2582 {
2583 /* Handle local symbol. */
2584 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2585 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
2586 BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
2587 linker_section_ptr = (elf_find_pointer_linker_section
2588 (elf_local_ptr_offsets (input_bfd)[r_symndx],
2589 rel->r_addend,
2590 lsect));
2591
2592 BFD_ASSERT (linker_section_ptr != NULL);
2593
2594 /* Write out pointer if it hasn't been rewritten out before. */
2595 if (!linker_section_ptr->written_address_p)
2596 {
2597 linker_section_ptr->written_address_p = TRUE;
2598 bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
2599 lsect->section->contents + linker_section_ptr->offset);
2600
2601 if (info->shared)
2602 {
2603 /* We need to generate a relative reloc for the dynamic
2604 linker. */
2605
2606 asection *srel = lsect->rel_section;
2607 Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL];
2608 bfd_byte *erel;
2609 struct elf_backend_data *bed = get_elf_backend_data (output_bfd);
2610 unsigned int i;
2611
2612 BFD_ASSERT (srel != NULL);
2613
2614 for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
2615 {
2616 outrel[i].r_offset = (lsect->section->output_section->vma
2617 + lsect->section->output_offset
2618 + linker_section_ptr->offset);
2619 outrel[i].r_info = 0;
2620 outrel[i].r_addend = 0;
2621 }
2622 outrel[0].r_info = ELF32_R_INFO (0, relative_reloc);
2623 erel = lsect->section->contents;
2624 erel += (elf_section_data (lsect->section)->rel_count++
2625 * sizeof (Elf32_External_Rela));
2626 bfd_elf32_swap_reloca_out (output_bfd, outrel, erel);
2627 }
2628 }
2629 }
2630
2631 relocation = (lsect->section->output_offset
2632 + linker_section_ptr->offset
2633 - lsect->sym_offset);
2634
2635 #ifdef DEBUG
2636 fprintf (stderr,
2637 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
2638 lsect->name, (long) relocation, (long) relocation);
2639 #endif
2640
2641 /* Subtract out the addend, because it will get added back in by the normal
2642 processing. */
2643 return relocation - linker_section_ptr->addend;
2644 }
2645 \f
2646 /* Create a special linker section */
2647 static elf_linker_section_t *
2648 ppc_elf_create_linker_section (bfd *abfd,
2649 struct bfd_link_info *info,
2650 enum elf_linker_section_enum which)
2651 {
2652 elf_linker_section_t *lsect;
2653 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2654 asection *s;
2655 bfd_size_type amt;
2656 flagword flags;
2657 const char *name;
2658 const char *rel_name;
2659 const char *sym_name;
2660 bfd_vma sym_offset;
2661
2662 /* Both of these sections are (technically) created by the user
2663 putting data in them, so they shouldn't be marked
2664 SEC_LINKER_CREATED.
2665
2666 The linker creates them so it has somewhere to attach their
2667 respective symbols. In fact, if they were empty it would
2668 be OK to leave the symbol set to 0 (or any random number), because
2669 the appropriate register should never be used. */
2670 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
2671 sym_offset = 32768;
2672
2673 switch (which)
2674 {
2675 default:
2676 abort ();
2677 return NULL;
2678
2679 case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
2680 name = ".sdata";
2681 rel_name = ".rela.sdata";
2682 sym_name = "_SDA_BASE_";
2683 break;
2684
2685 case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
2686 name = ".sdata2";
2687 rel_name = ".rela.sdata2";
2688 sym_name = "_SDA2_BASE_";
2689 flags |= SEC_READONLY;
2690 break;
2691 }
2692
2693 /* Record the first bfd that needs the special sections. */
2694 if (!htab->elf.dynobj)
2695 htab->elf.dynobj = abfd;
2696
2697 amt = sizeof (elf_linker_section_t);
2698 lsect = bfd_zalloc (htab->elf.dynobj, amt);
2699
2700 lsect->sym_offset = sym_offset;
2701
2702 /* See if the sections already exist. */
2703 s = bfd_get_section_by_name (htab->elf.dynobj, name);
2704 if (s == NULL || (s->flags & flags) != flags)
2705 {
2706 s = bfd_make_section_anyway (htab->elf.dynobj, name);
2707 if (s == NULL
2708 || !bfd_set_section_flags (htab->elf.dynobj, s, flags))
2709 return NULL;
2710 }
2711 lsect->section = s;
2712
2713 if (bfd_get_section_alignment (htab->elf.dynobj, s) < 2
2714 && !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2715 return NULL;
2716
2717 s->_raw_size = align_power (s->_raw_size, 2);
2718
2719 #ifdef DEBUG
2720 fprintf (stderr, "Creating section %s, current size = %ld\n",
2721 name, (long) s->_raw_size);
2722 #endif
2723
2724 if (sym_name)
2725 {
2726 struct elf_link_hash_entry *h;
2727 struct bfd_link_hash_entry *bh;
2728
2729 #ifdef DEBUG
2730 fprintf (stderr, "Adding %s to section %s\n", sym_name, name);
2731 #endif
2732 bh = bfd_link_hash_lookup (info->hash, sym_name,
2733 FALSE, FALSE, FALSE);
2734
2735 if ((bh == NULL || bh->type == bfd_link_hash_undefined)
2736 && !(_bfd_generic_link_add_one_symbol
2737 (info, abfd, sym_name, BSF_GLOBAL, s, sym_offset, NULL,
2738 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
2739 return NULL;
2740 h = (struct elf_link_hash_entry *) bh;
2741
2742 h->type = STT_OBJECT;
2743 lsect->sym_hash = h;
2744
2745 if (info->shared
2746 && ! _bfd_elf_link_record_dynamic_symbol (info, h))
2747 return NULL;
2748 }
2749
2750 if (info->shared)
2751 {
2752 s = bfd_make_section_anyway (htab->elf.dynobj, rel_name);
2753 lsect->rel_section = s;
2754 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2755 | SEC_LINKER_CREATED | SEC_READONLY);
2756 if (s == NULL
2757 || ! bfd_set_section_flags (htab->elf.dynobj, s, flags)
2758 || ! bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2759 return NULL;
2760 }
2761
2762 return lsect;
2763 }
2764 \f
2765 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
2766 need to bump up the number of section headers. */
2767
2768 static int
2769 ppc_elf_additional_program_headers (bfd *abfd)
2770 {
2771 asection *s;
2772 int ret;
2773
2774 ret = 0;
2775
2776 s = bfd_get_section_by_name (abfd, ".interp");
2777 if (s != NULL)
2778 ++ret;
2779
2780 s = bfd_get_section_by_name (abfd, ".sbss2");
2781 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2782 ++ret;
2783
2784 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2785 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2786 ++ret;
2787
2788 return ret;
2789 }
2790
2791 /* Modify the segment map if needed. */
2792
2793 static bfd_boolean
2794 ppc_elf_modify_segment_map (bfd *abfd ATTRIBUTE_UNUSED)
2795 {
2796 return TRUE;
2797 }
2798 \f
2799 /* The powerpc .got has a blrl instruction in it. Mark it executable. */
2800
2801 static bfd_boolean
2802 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2803 {
2804 struct ppc_elf_link_hash_table *htab;
2805 asection *s;
2806 flagword flags;
2807
2808 if (!_bfd_elf_create_got_section (abfd, info))
2809 return FALSE;
2810
2811 htab = ppc_elf_hash_table (info);
2812 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2813 if (s == NULL)
2814 abort ();
2815
2816 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2817 | SEC_LINKER_CREATED);
2818 if (!bfd_set_section_flags (abfd, s, flags))
2819 return FALSE;
2820
2821 htab->relgot = bfd_make_section (abfd, ".rela.got");
2822 if (!htab->relgot
2823 || ! bfd_set_section_flags (abfd, htab->relgot,
2824 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2825 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2826 | SEC_READONLY))
2827 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2828 return FALSE;
2829
2830 return TRUE;
2831 }
2832
2833 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2834 to output sections (just like _bfd_elf_create_dynamic_sections has
2835 to create .dynbss and .rela.bss). */
2836
2837 static bfd_boolean
2838 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2839 {
2840 struct ppc_elf_link_hash_table *htab;
2841 asection *s;
2842 flagword flags;
2843
2844 htab = ppc_elf_hash_table (info);
2845
2846 if (htab->got == NULL
2847 && !ppc_elf_create_got (abfd, info))
2848 return FALSE;
2849
2850 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2851 return FALSE;
2852
2853 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2854 | SEC_LINKER_CREATED);
2855
2856 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2857 htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
2858 if (s == NULL
2859 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
2860 return FALSE;
2861
2862 if (! info->shared)
2863 {
2864 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2865 htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss");
2866 if (s == NULL
2867 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
2868 || ! bfd_set_section_alignment (abfd, s, 2))
2869 return FALSE;
2870 }
2871
2872 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2873 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2874 if (s == NULL)
2875 abort ();
2876
2877 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
2878 return bfd_set_section_flags (abfd, s, flags);
2879 }
2880
2881 /* Adjust a symbol defined by a dynamic object and referenced by a
2882 regular object. The current definition is in some section of the
2883 dynamic object, but we're not including those sections. We have to
2884 change the definition to something the rest of the link can
2885 understand. */
2886
2887 static bfd_boolean
2888 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2889 struct elf_link_hash_entry *h)
2890 {
2891 struct ppc_elf_link_hash_table *htab;
2892 asection *s;
2893 unsigned int power_of_two;
2894
2895 #ifdef DEBUG
2896 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
2897 h->root.root.string);
2898 #endif
2899
2900 /* Make sure we know what is going on here. */
2901 htab = ppc_elf_hash_table (info);
2902 BFD_ASSERT (htab->elf.dynobj != NULL
2903 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2904 || h->weakdef != NULL
2905 || ((h->elf_link_hash_flags
2906 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2907 && (h->elf_link_hash_flags
2908 & ELF_LINK_HASH_REF_REGULAR) != 0
2909 && (h->elf_link_hash_flags
2910 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2911
2912 /* Deal with function syms. */
2913 if (h->type == STT_FUNC
2914 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2915 {
2916 /* Clear procedure linkage table information for any symbol that
2917 won't need a .plt entry. */
2918 if (h->plt.refcount <= 0
2919 || SYMBOL_CALLS_LOCAL (info, h)
2920 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2921 && h->root.type == bfd_link_hash_undefweak))
2922 {
2923 /* A PLT entry is not required/allowed when:
2924
2925 1. We are not using ld.so; because then the PLT entry
2926 can't be set up, so we can't use one. In this case,
2927 ppc_elf_adjust_dynamic_symbol won't even be called.
2928
2929 2. GC has rendered the entry unused.
2930
2931 3. We know for certain that a call to this symbol
2932 will go to this object, or will remain undefined. */
2933 h->plt.offset = (bfd_vma) -1;
2934 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2935 }
2936 return TRUE;
2937 }
2938 else
2939 h->plt.offset = (bfd_vma) -1;
2940
2941 /* If this is a weak symbol, and there is a real definition, the
2942 processor independent code will have arranged for us to see the
2943 real definition first, and we can just use the same value. */
2944 if (h->weakdef != NULL)
2945 {
2946 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2947 || h->weakdef->root.type == bfd_link_hash_defweak);
2948 h->root.u.def.section = h->weakdef->root.u.def.section;
2949 h->root.u.def.value = h->weakdef->root.u.def.value;
2950 if (ELIMINATE_COPY_RELOCS)
2951 h->elf_link_hash_flags
2952 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
2953 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
2954 return TRUE;
2955 }
2956
2957 /* This is a reference to a symbol defined by a dynamic object which
2958 is not a function. */
2959
2960 /* If we are creating a shared library, we must presume that the
2961 only references to the symbol are via the global offset table.
2962 For such cases we need not do anything here; the relocations will
2963 be handled correctly by relocate_section. */
2964 if (info->shared)
2965 return TRUE;
2966
2967 /* If there are no references to this symbol that do not use the
2968 GOT, we don't need to generate a copy reloc. */
2969 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
2970 return TRUE;
2971
2972 if (ELIMINATE_COPY_RELOCS)
2973 {
2974 struct ppc_elf_dyn_relocs *p;
2975 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
2976 {
2977 s = p->sec->output_section;
2978 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2979 break;
2980 }
2981
2982 /* If we didn't find any dynamic relocs in read-only sections, then
2983 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2984 if (p == NULL)
2985 {
2986 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
2987 return TRUE;
2988 }
2989 }
2990
2991 /* We must allocate the symbol in our .dynbss section, which will
2992 become part of the .bss section of the executable. There will be
2993 an entry for this symbol in the .dynsym section. The dynamic
2994 object will contain position independent code, so all references
2995 from the dynamic object to this symbol will go through the global
2996 offset table. The dynamic linker will use the .dynsym entry to
2997 determine the address it must put in the global offset table, so
2998 both the dynamic object and the regular object will refer to the
2999 same memory location for the variable.
3000
3001 Of course, if the symbol is sufficiently small, we must instead
3002 allocate it in .sbss. FIXME: It would be better to do this if and
3003 only if there were actually SDAREL relocs for that symbol. */
3004
3005 if (h->size <= elf_gp_size (htab->elf.dynobj))
3006 s = htab->dynsbss;
3007 else
3008 s = htab->dynbss;
3009 BFD_ASSERT (s != NULL);
3010
3011 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
3012 copy the initial value out of the dynamic object and into the
3013 runtime process image. We need to remember the offset into the
3014 .rela.bss section we are going to use. */
3015 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3016 {
3017 asection *srel;
3018
3019 if (h->size <= elf_gp_size (htab->elf.dynobj))
3020 srel = htab->relsbss;
3021 else
3022 srel = htab->relbss;
3023 BFD_ASSERT (srel != NULL);
3024 srel->_raw_size += sizeof (Elf32_External_Rela);
3025 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
3026 }
3027
3028 /* We need to figure out the alignment required for this symbol. I
3029 have no idea how ELF linkers handle this. */
3030 power_of_two = bfd_log2 (h->size);
3031 if (power_of_two > 4)
3032 power_of_two = 4;
3033
3034 /* Apply the required alignment. */
3035 s->_raw_size = BFD_ALIGN (s->_raw_size,
3036 (bfd_size_type) (1 << power_of_two));
3037 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
3038 {
3039 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
3040 return FALSE;
3041 }
3042
3043 /* Define the symbol as being at this point in the section. */
3044 h->root.u.def.section = s;
3045 h->root.u.def.value = s->_raw_size;
3046
3047 /* Increment the section size to make room for the symbol. */
3048 s->_raw_size += h->size;
3049
3050 return TRUE;
3051 }
3052 \f
3053 /* This is the condition under which finish_dynamic_symbol will be
3054 called from elflink.h. If elflink.h doesn't call our
3055 finish_dynamic_symbol routine, we'll need to do something about
3056 initializing any .plt and .got entries in relocate_section. */
3057 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
3058 ((DYN) \
3059 && ((SHARED) \
3060 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
3061 && ((H)->dynindx != -1 \
3062 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
3063
3064 /* Of those relocs that might be copied as dynamic relocs, this macro
3065 selects those that must be copied when linking a shared library,
3066 even when the symbol is local. */
3067
3068 #define MUST_BE_DYN_RELOC(RTYPE) \
3069 ((RTYPE) != R_PPC_REL24 \
3070 && (RTYPE) != R_PPC_REL14 \
3071 && (RTYPE) != R_PPC_REL14_BRTAKEN \
3072 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
3073 && (RTYPE) != R_PPC_REL32)
3074
3075 /* Allocate space in associated reloc sections for dynamic relocs. */
3076
3077 static bfd_boolean
3078 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3079 {
3080 struct bfd_link_info *info = inf;
3081 struct ppc_elf_link_hash_entry *eh;
3082 struct ppc_elf_link_hash_table *htab;
3083 struct ppc_elf_dyn_relocs *p;
3084
3085 if (h->root.type == bfd_link_hash_indirect)
3086 return TRUE;
3087
3088 if (h->root.type == bfd_link_hash_warning)
3089 /* When warning symbols are created, they **replace** the "real"
3090 entry in the hash table, thus we never get to see the real
3091 symbol in a hash traversal. So look at it now. */
3092 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3093
3094 htab = ppc_elf_hash_table (info);
3095 if (htab->elf.dynamic_sections_created
3096 && h->plt.refcount > 0)
3097 {
3098 /* Make sure this symbol is output as a dynamic symbol. */
3099 if (h->dynindx == -1
3100 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3101 {
3102 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
3103 return FALSE;
3104 }
3105
3106 if (info->shared
3107 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3108 {
3109 asection *s = htab->plt;
3110
3111 /* If this is the first .plt entry, make room for the special
3112 first entry. */
3113 if (s->_raw_size == 0)
3114 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
3115
3116 /* The PowerPC PLT is actually composed of two parts, the
3117 first part is 2 words (for a load and a jump), and then
3118 there is a remaining word available at the end. */
3119 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
3120 + (PLT_SLOT_SIZE
3121 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE)
3122 / PLT_ENTRY_SIZE)));
3123
3124 /* If this symbol is not defined in a regular file, and we
3125 are not generating a shared library, then set the symbol
3126 to this location in the .plt. This is required to make
3127 function pointers compare as equal between the normal
3128 executable and the shared library. */
3129 if (! info->shared
3130 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3131 {
3132 h->root.u.def.section = s;
3133 h->root.u.def.value = h->plt.offset;
3134 }
3135
3136 /* Make room for this entry. After the 8192nd entry, room
3137 for two entries is allocated. */
3138 s->_raw_size += PLT_ENTRY_SIZE;
3139 if ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
3140 > PLT_NUM_SINGLE_ENTRIES)
3141 s->_raw_size += PLT_ENTRY_SIZE;
3142
3143 /* We also need to make an entry in the .rela.plt section. */
3144 htab->relplt->_raw_size += sizeof (Elf32_External_Rela);
3145 }
3146 else
3147 {
3148 h->plt.offset = (bfd_vma) -1;
3149 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3150 }
3151 }
3152 else
3153 {
3154 h->plt.offset = (bfd_vma) -1;
3155 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3156 }
3157
3158 eh = (struct ppc_elf_link_hash_entry *) h;
3159 if (eh->elf.got.refcount > 0)
3160 {
3161 /* Make sure this symbol is output as a dynamic symbol. */
3162 if (eh->elf.dynindx == -1
3163 && (eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3164 {
3165 if (!bfd_elf32_link_record_dynamic_symbol (info, &eh->elf))
3166 return FALSE;
3167 }
3168
3169 if (eh->tls_mask == (TLS_TLS | TLS_LD)
3170 && !(eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
3171 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
3172 eh->elf.got.offset = (bfd_vma) -1;
3173 else
3174 {
3175 bfd_boolean dyn;
3176 eh->elf.got.offset = htab->got->_raw_size;
3177 if ((eh->tls_mask & TLS_TLS) != 0)
3178 {
3179 if ((eh->tls_mask & TLS_LD) != 0)
3180 htab->got->_raw_size += 8;
3181 if ((eh->tls_mask & TLS_GD) != 0)
3182 htab->got->_raw_size += 8;
3183 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
3184 htab->got->_raw_size += 4;
3185 if ((eh->tls_mask & TLS_DTPREL) != 0)
3186 htab->got->_raw_size += 4;
3187 }
3188 else
3189 htab->got->_raw_size += 4;
3190 dyn = htab->elf.dynamic_sections_created;
3191 if ((info->shared
3192 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
3193 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
3194 || eh->elf.root.type != bfd_link_hash_undefweak))
3195 {
3196 /* All the entries we allocated need relocs. */
3197 htab->relgot->_raw_size
3198 += ((htab->got->_raw_size - eh->elf.got.offset) / 4
3199 * sizeof (Elf32_External_Rela));
3200 /* Except LD only needs one. */
3201 if ((eh->tls_mask & TLS_LD) != 0)
3202 htab->relgot->_raw_size -= sizeof (Elf32_External_Rela);
3203 }
3204 }
3205 }
3206 else
3207 eh->elf.got.offset = (bfd_vma) -1;
3208
3209 if (eh->dyn_relocs == NULL)
3210 return TRUE;
3211
3212 /* In the shared -Bsymbolic case, discard space allocated for
3213 dynamic pc-relative relocs against symbols which turn out to be
3214 defined in regular objects. For the normal shared case, discard
3215 space for relocs that have become local due to symbol visibility
3216 changes. */
3217
3218 if (info->shared)
3219 {
3220 /* Relocs that use pc_count are those that appear on a call insn,
3221 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
3222 generated via assembly. We want calls to protected symbols to
3223 resolve directly to the function rather than going via the plt.
3224 If people want function pointer comparisons to work as expected
3225 then they should avoid writing weird assembly. */
3226 if (SYMBOL_CALLS_LOCAL (info, h))
3227 {
3228 struct ppc_elf_dyn_relocs **pp;
3229
3230 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3231 {
3232 p->count -= p->pc_count;
3233 p->pc_count = 0;
3234 if (p->count == 0)
3235 *pp = p->next;
3236 else
3237 pp = &p->next;
3238 }
3239 }
3240
3241 /* Also discard relocs on undefined weak syms with non-default
3242 visibility. */
3243 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3244 && h->root.type == bfd_link_hash_undefweak)
3245 eh->dyn_relocs = NULL;
3246 }
3247 else if (ELIMINATE_COPY_RELOCS)
3248 {
3249 /* For the non-shared case, discard space for relocs against
3250 symbols which turn out to need copy relocs or are not
3251 dynamic. */
3252
3253 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3254 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3255 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3256 {
3257 /* Make sure this symbol is output as a dynamic symbol.
3258 Undefined weak syms won't yet be marked as dynamic. */
3259 if (h->dynindx == -1
3260 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3261 {
3262 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
3263 return FALSE;
3264 }
3265
3266 /* If that succeeded, we know we'll be keeping all the
3267 relocs. */
3268 if (h->dynindx != -1)
3269 goto keep;
3270 }
3271
3272 eh->dyn_relocs = NULL;
3273
3274 keep: ;
3275 }
3276
3277 /* Finally, allocate space. */
3278 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3279 {
3280 asection *sreloc = elf_section_data (p->sec)->sreloc;
3281 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
3282 }
3283
3284 return TRUE;
3285 }
3286
3287 /* Find any dynamic relocs that apply to read-only sections. */
3288
3289 static bfd_boolean
3290 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
3291 {
3292 struct ppc_elf_dyn_relocs *p;
3293
3294 if (h->root.type == bfd_link_hash_indirect)
3295 return TRUE;
3296
3297 if (h->root.type == bfd_link_hash_warning)
3298 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3299
3300 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3301 {
3302 asection *s = p->sec->output_section;
3303
3304 if (s != NULL
3305 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
3306 == (SEC_READONLY | SEC_ALLOC)))
3307 {
3308 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
3309
3310 /* Not an error, just cut short the traversal. */
3311 return FALSE;
3312 }
3313 }
3314 return TRUE;
3315 }
3316
3317 /* Set the sizes of the dynamic sections. */
3318
3319 static bfd_boolean
3320 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3321 struct bfd_link_info *info)
3322 {
3323 struct ppc_elf_link_hash_table *htab;
3324 asection *s;
3325 bfd_boolean relocs;
3326 bfd *ibfd;
3327
3328 #ifdef DEBUG
3329 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
3330 #endif
3331
3332 htab = ppc_elf_hash_table (info);
3333 BFD_ASSERT (htab->elf.dynobj != NULL);
3334
3335 if (elf_hash_table (info)->dynamic_sections_created)
3336 {
3337 /* Set the contents of the .interp section to the interpreter. */
3338 if (info->executable)
3339 {
3340 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
3341 BFD_ASSERT (s != NULL);
3342 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3343 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3344 }
3345 }
3346
3347 if (htab->tlsld_got.refcount > 0)
3348 {
3349 htab->tlsld_got.offset = htab->got->_raw_size;
3350 htab->got->_raw_size += 8;
3351 if (info->shared)
3352 htab->relgot->_raw_size += sizeof (Elf32_External_Rela);
3353 }
3354 else
3355 htab->tlsld_got.offset = (bfd_vma) -1;
3356
3357 /* Set up .got offsets for local syms, and space for local dynamic
3358 relocs. */
3359 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3360 {
3361 bfd_signed_vma *local_got;
3362 bfd_signed_vma *end_local_got;
3363 char *lgot_masks;
3364 bfd_size_type locsymcount;
3365 Elf_Internal_Shdr *symtab_hdr;
3366 asection *srel;
3367
3368 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
3369 continue;
3370
3371 for (s = ibfd->sections; s != NULL; s = s->next)
3372 {
3373 struct ppc_elf_dyn_relocs *p;
3374
3375 for (p = ((struct ppc_elf_dyn_relocs *)
3376 elf_section_data (s)->local_dynrel);
3377 p != NULL;
3378 p = p->next)
3379 {
3380 if (!bfd_is_abs_section (p->sec)
3381 && bfd_is_abs_section (p->sec->output_section))
3382 {
3383 /* Input section has been discarded, either because
3384 it is a copy of a linkonce section or due to
3385 linker script /DISCARD/, so we'll be discarding
3386 the relocs too. */
3387 }
3388 else if (p->count != 0)
3389 {
3390 elf_section_data (p->sec)->sreloc->_raw_size
3391 += p->count * sizeof (Elf32_External_Rela);
3392 if ((p->sec->output_section->flags
3393 & (SEC_READONLY | SEC_ALLOC))
3394 == (SEC_READONLY | SEC_ALLOC))
3395 info->flags |= DF_TEXTREL;
3396 }
3397 }
3398 }
3399
3400 local_got = elf_local_got_refcounts (ibfd);
3401 if (!local_got)
3402 continue;
3403
3404 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3405 locsymcount = symtab_hdr->sh_info;
3406 end_local_got = local_got + locsymcount;
3407 lgot_masks = (char *) end_local_got;
3408 s = htab->got;
3409 srel = htab->relgot;
3410 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3411 if (*local_got > 0)
3412 {
3413 if (*lgot_masks == (TLS_TLS | TLS_LD))
3414 {
3415 /* If just an LD reloc, we'll just use
3416 htab->tlsld_got.offset. */
3417 if (htab->tlsld_got.offset == (bfd_vma) -1)
3418 {
3419 htab->tlsld_got.offset = s->_raw_size;
3420 s->_raw_size += 8;
3421 if (info->shared)
3422 srel->_raw_size += sizeof (Elf32_External_Rela);
3423 }
3424 *local_got = (bfd_vma) -1;
3425 }
3426 else
3427 {
3428 *local_got = s->_raw_size;
3429 if ((*lgot_masks & TLS_TLS) != 0)
3430 {
3431 if ((*lgot_masks & TLS_GD) != 0)
3432 s->_raw_size += 8;
3433 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
3434 s->_raw_size += 4;
3435 if ((*lgot_masks & TLS_DTPREL) != 0)
3436 s->_raw_size += 4;
3437 }
3438 else
3439 s->_raw_size += 4;
3440 if (info->shared)
3441 srel->_raw_size += ((s->_raw_size - *local_got) / 4
3442 * sizeof (Elf32_External_Rela));
3443 }
3444 }
3445 else
3446 *local_got = (bfd_vma) -1;
3447 }
3448
3449 /* Allocate space for global sym dynamic relocs. */
3450 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3451
3452 /* We've now determined the sizes of the various dynamic sections.
3453 Allocate memory for them. */
3454 relocs = FALSE;
3455 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
3456 {
3457 if ((s->flags & SEC_LINKER_CREATED) == 0)
3458 continue;
3459
3460 if (s == htab->plt
3461 || s == htab->got
3462 || (htab->sdata != NULL && s == htab->sdata->section)
3463 || (htab->sdata2 != NULL && s == htab->sdata2->section))
3464 {
3465 /* Strip this section if we don't need it; see the
3466 comment below. */
3467 }
3468 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
3469 {
3470 if (s->_raw_size == 0)
3471 {
3472 /* If we don't need this section, strip it from the
3473 output file. This is mostly to handle .rela.bss and
3474 .rela.plt. We must create both sections in
3475 create_dynamic_sections, because they must be created
3476 before the linker maps input sections to output
3477 sections. The linker does that before
3478 adjust_dynamic_symbol is called, and it is that
3479 function which decides whether anything needs to go
3480 into these sections. */
3481 }
3482 else
3483 {
3484 /* Remember whether there are any relocation sections. */
3485 relocs = TRUE;
3486
3487 /* We use the reloc_count field as a counter if we need
3488 to copy relocs into the output file. */
3489 s->reloc_count = 0;
3490 }
3491 }
3492 else
3493 {
3494 /* It's not one of our sections, so don't allocate space. */
3495 continue;
3496 }
3497
3498 if (s->_raw_size == 0)
3499 {
3500 _bfd_strip_section_from_output (info, s);
3501 continue;
3502 }
3503
3504 /* Allocate memory for the section contents. */
3505 s->contents = bfd_zalloc (htab->elf.dynobj, s->_raw_size);
3506 if (s->contents == NULL)
3507 return FALSE;
3508 }
3509
3510 if (htab->elf.dynamic_sections_created)
3511 {
3512 /* Add some entries to the .dynamic section. We fill in the
3513 values later, in ppc_elf_finish_dynamic_sections, but we
3514 must add the entries now so that we get the correct size for
3515 the .dynamic section. The DT_DEBUG entry is filled in by the
3516 dynamic linker and used by the debugger. */
3517 #define add_dynamic_entry(TAG, VAL) \
3518 bfd_elf32_add_dynamic_entry (info, (TAG), (VAL))
3519
3520 if (info->executable)
3521 {
3522 if (!add_dynamic_entry (DT_DEBUG, 0))
3523 return FALSE;
3524 }
3525
3526 if (htab->plt != NULL && htab->plt->_raw_size != 0)
3527 {
3528 if (!add_dynamic_entry (DT_PLTGOT, 0)
3529 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3530 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3531 || !add_dynamic_entry (DT_JMPREL, 0))
3532 return FALSE;
3533 }
3534
3535 if (relocs)
3536 {
3537 if (!add_dynamic_entry (DT_RELA, 0)
3538 || !add_dynamic_entry (DT_RELASZ, 0)
3539 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3540 return FALSE;
3541 }
3542
3543 /* If any dynamic relocs apply to a read-only section, then we
3544 need a DT_TEXTREL entry. */
3545 if ((info->flags & DF_TEXTREL) == 0)
3546 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
3547 info);
3548
3549 if ((info->flags & DF_TEXTREL) != 0)
3550 {
3551 if (!add_dynamic_entry (DT_TEXTREL, 0))
3552 return FALSE;
3553 }
3554 }
3555 #undef add_dynamic_entry
3556
3557 return TRUE;
3558 }
3559 \f
3560 static bfd_boolean
3561 update_local_sym_info (bfd *abfd,
3562 Elf_Internal_Shdr *symtab_hdr,
3563 unsigned long r_symndx,
3564 int tls_type)
3565 {
3566 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3567 char *local_got_tls_masks;
3568
3569 if (local_got_refcounts == NULL)
3570 {
3571 bfd_size_type size = symtab_hdr->sh_info;
3572
3573 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3574 local_got_refcounts = bfd_zalloc (abfd, size);
3575 if (local_got_refcounts == NULL)
3576 return FALSE;
3577 elf_local_got_refcounts (abfd) = local_got_refcounts;
3578 }
3579
3580 local_got_refcounts[r_symndx] += 1;
3581 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3582 local_got_tls_masks[r_symndx] |= tls_type;
3583 return TRUE;
3584 }
3585
3586 static void
3587 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3588 {
3589 (*_bfd_error_handler)
3590 (_("%s: relocation %s cannot be used when making a shared object"),
3591 bfd_archive_filename (abfd),
3592 ppc_elf_howto_table[r_type]->name);
3593 bfd_set_error (bfd_error_bad_value);
3594 }
3595
3596 /* Look through the relocs for a section during the first phase, and
3597 allocate space in the global offset table or procedure linkage
3598 table. */
3599
3600 static bfd_boolean
3601 ppc_elf_check_relocs (bfd *abfd,
3602 struct bfd_link_info *info,
3603 asection *sec,
3604 const Elf_Internal_Rela *relocs)
3605 {
3606 struct ppc_elf_link_hash_table *htab;
3607 Elf_Internal_Shdr *symtab_hdr;
3608 struct elf_link_hash_entry **sym_hashes;
3609 const Elf_Internal_Rela *rel;
3610 const Elf_Internal_Rela *rel_end;
3611 asection *sreloc;
3612
3613 if (info->relocatable)
3614 return TRUE;
3615
3616 #ifdef DEBUG
3617 fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n",
3618 bfd_get_section_name (abfd, sec),
3619 bfd_archive_filename (abfd));
3620 #endif
3621
3622 /* Initialize howto table if not already done. */
3623 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3624 ppc_elf_howto_init ();
3625
3626 /* Create the linker generated sections all the time so that the
3627 special symbols are created. */
3628 htab = ppc_elf_hash_table (info);
3629 if (htab->sdata == NULL)
3630 {
3631 htab->sdata = ppc_elf_create_linker_section (abfd, info,
3632 LINKER_SECTION_SDATA);
3633 if (htab->sdata == NULL)
3634 return FALSE;
3635 }
3636
3637 if (htab->sdata2 == NULL)
3638 {
3639 htab->sdata2 = ppc_elf_create_linker_section (abfd, info,
3640 LINKER_SECTION_SDATA2);
3641 if (htab->sdata2 == NULL)
3642 return FALSE;
3643 }
3644
3645 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3646 sym_hashes = elf_sym_hashes (abfd);
3647 sreloc = NULL;
3648
3649 rel_end = relocs + sec->reloc_count;
3650 for (rel = relocs; rel < rel_end; rel++)
3651 {
3652 unsigned long r_symndx;
3653 enum elf_ppc_reloc_type r_type;
3654 struct elf_link_hash_entry *h;
3655 int tls_type = 0;
3656
3657 r_symndx = ELF32_R_SYM (rel->r_info);
3658 if (r_symndx < symtab_hdr->sh_info)
3659 h = NULL;
3660 else
3661 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3662
3663 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3664 This shows up in particular in an R_PPC_ADDR32 in the eabi
3665 startup code. */
3666 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3667 {
3668 if (htab->got == NULL)
3669 {
3670 if (htab->elf.dynobj == NULL)
3671 htab->elf.dynobj = abfd;
3672 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3673 return FALSE;
3674 }
3675 }
3676
3677 r_type = ELF32_R_TYPE (rel->r_info);
3678 switch (r_type)
3679 {
3680 case R_PPC_GOT_TLSLD16:
3681 case R_PPC_GOT_TLSLD16_LO:
3682 case R_PPC_GOT_TLSLD16_HI:
3683 case R_PPC_GOT_TLSLD16_HA:
3684 htab->tlsld_got.refcount += 1;
3685 tls_type = TLS_TLS | TLS_LD;
3686 goto dogottls;
3687
3688 case R_PPC_GOT_TLSGD16:
3689 case R_PPC_GOT_TLSGD16_LO:
3690 case R_PPC_GOT_TLSGD16_HI:
3691 case R_PPC_GOT_TLSGD16_HA:
3692 tls_type = TLS_TLS | TLS_GD;
3693 goto dogottls;
3694
3695 case R_PPC_GOT_TPREL16:
3696 case R_PPC_GOT_TPREL16_LO:
3697 case R_PPC_GOT_TPREL16_HI:
3698 case R_PPC_GOT_TPREL16_HA:
3699 if (info->shared)
3700 info->flags |= DF_STATIC_TLS;
3701 tls_type = TLS_TLS | TLS_TPREL;
3702 goto dogottls;
3703
3704 case R_PPC_GOT_DTPREL16:
3705 case R_PPC_GOT_DTPREL16_LO:
3706 case R_PPC_GOT_DTPREL16_HI:
3707 case R_PPC_GOT_DTPREL16_HA:
3708 tls_type = TLS_TLS | TLS_DTPREL;
3709 dogottls:
3710 sec->has_tls_reloc = 1;
3711 /* Fall thru */
3712
3713 /* GOT16 relocations */
3714 case R_PPC_GOT16:
3715 case R_PPC_GOT16_LO:
3716 case R_PPC_GOT16_HI:
3717 case R_PPC_GOT16_HA:
3718 /* This symbol requires a global offset table entry. */
3719 if (htab->got == NULL)
3720 {
3721 if (htab->elf.dynobj == NULL)
3722 htab->elf.dynobj = abfd;
3723 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3724 return FALSE;
3725 }
3726 if (h != NULL)
3727 {
3728 h->got.refcount += 1;
3729 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3730 }
3731 else
3732 /* This is a global offset table entry for a local symbol. */
3733 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3734 return FALSE;
3735 break;
3736
3737 /* Indirect .sdata relocation. */
3738 case R_PPC_EMB_SDAI16:
3739 if (info->shared)
3740 {
3741 bad_shared_reloc (abfd, r_type);
3742 return FALSE;
3743 }
3744 if (!elf_create_pointer_linker_section (abfd, info,
3745 htab->sdata, h, rel))
3746 return FALSE;
3747 break;
3748
3749 /* Indirect .sdata2 relocation. */
3750 case R_PPC_EMB_SDA2I16:
3751 if (info->shared)
3752 {
3753 bad_shared_reloc (abfd, r_type);
3754 return FALSE;
3755 }
3756 if (!elf_create_pointer_linker_section (abfd, info,
3757 htab->sdata2, h, rel))
3758 return FALSE;
3759 break;
3760
3761 case R_PPC_SDAREL16:
3762 case R_PPC_EMB_SDA2REL:
3763 case R_PPC_EMB_SDA21:
3764 case R_PPC_EMB_RELSDA:
3765 case R_PPC_EMB_NADDR32:
3766 case R_PPC_EMB_NADDR16:
3767 case R_PPC_EMB_NADDR16_LO:
3768 case R_PPC_EMB_NADDR16_HI:
3769 case R_PPC_EMB_NADDR16_HA:
3770 if (info->shared)
3771 {
3772 bad_shared_reloc (abfd, r_type);
3773 return FALSE;
3774 }
3775 break;
3776
3777 case R_PPC_PLT32:
3778 case R_PPC_PLTREL24:
3779 case R_PPC_PLTREL32:
3780 case R_PPC_PLT16_LO:
3781 case R_PPC_PLT16_HI:
3782 case R_PPC_PLT16_HA:
3783 #ifdef DEBUG
3784 fprintf (stderr, "Reloc requires a PLT entry\n");
3785 #endif
3786 /* This symbol requires a procedure linkage table entry. We
3787 actually build the entry in finish_dynamic_symbol,
3788 because this might be a case of linking PIC code without
3789 linking in any dynamic objects, in which case we don't
3790 need to generate a procedure linkage table after all. */
3791
3792 if (h == NULL)
3793 {
3794 /* It does not make sense to have a procedure linkage
3795 table entry for a local symbol. */
3796 (*_bfd_error_handler) (_("%s(%s+0x%lx): %s reloc against "
3797 "local symbol"),
3798 bfd_archive_filename (abfd),
3799 sec->name,
3800 (long) rel->r_offset,
3801 ppc_elf_howto_table[r_type]->name);
3802 bfd_set_error (bfd_error_bad_value);
3803 return FALSE;
3804 }
3805
3806 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3807 h->plt.refcount++;
3808 break;
3809
3810 /* The following relocations don't need to propagate the
3811 relocation if linking a shared object since they are
3812 section relative. */
3813 case R_PPC_SECTOFF:
3814 case R_PPC_SECTOFF_LO:
3815 case R_PPC_SECTOFF_HI:
3816 case R_PPC_SECTOFF_HA:
3817 case R_PPC_DTPREL16:
3818 case R_PPC_DTPREL16_LO:
3819 case R_PPC_DTPREL16_HI:
3820 case R_PPC_DTPREL16_HA:
3821 case R_PPC_TOC16:
3822 break;
3823
3824 /* This are just markers. */
3825 case R_PPC_TLS:
3826 case R_PPC_EMB_MRKREF:
3827 case R_PPC_NONE:
3828 case R_PPC_max:
3829 break;
3830
3831 /* These should only appear in dynamic objects. */
3832 case R_PPC_COPY:
3833 case R_PPC_GLOB_DAT:
3834 case R_PPC_JMP_SLOT:
3835 case R_PPC_RELATIVE:
3836 break;
3837
3838 /* These aren't handled yet. We'll report an error later. */
3839 case R_PPC_ADDR30:
3840 case R_PPC_EMB_RELSEC16:
3841 case R_PPC_EMB_RELST_LO:
3842 case R_PPC_EMB_RELST_HI:
3843 case R_PPC_EMB_RELST_HA:
3844 case R_PPC_EMB_BIT_FLD:
3845 break;
3846
3847 /* This refers only to functions defined in the shared library. */
3848 case R_PPC_LOCAL24PC:
3849 break;
3850
3851 /* This relocation describes the C++ object vtable hierarchy.
3852 Reconstruct it for later use during GC. */
3853 case R_PPC_GNU_VTINHERIT:
3854 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3855 return FALSE;
3856 break;
3857
3858 /* This relocation describes which C++ vtable entries are actually
3859 used. Record for later use during GC. */
3860 case R_PPC_GNU_VTENTRY:
3861 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3862 return FALSE;
3863 break;
3864
3865 /* We shouldn't really be seeing these. */
3866 case R_PPC_TPREL32:
3867 if (info->shared)
3868 info->flags |= DF_STATIC_TLS;
3869 goto dodyn;
3870
3871 /* Nor these. */
3872 case R_PPC_DTPMOD32:
3873 case R_PPC_DTPREL32:
3874 goto dodyn;
3875
3876 case R_PPC_TPREL16:
3877 case R_PPC_TPREL16_LO:
3878 case R_PPC_TPREL16_HI:
3879 case R_PPC_TPREL16_HA:
3880 if (info->shared)
3881 info->flags |= DF_STATIC_TLS;
3882 goto dodyn;
3883
3884 /* When creating a shared object, we must copy these
3885 relocs into the output file. We create a reloc
3886 section in dynobj and make room for the reloc. */
3887 case R_PPC_REL24:
3888 case R_PPC_REL14:
3889 case R_PPC_REL14_BRTAKEN:
3890 case R_PPC_REL14_BRNTAKEN:
3891 case R_PPC_REL32:
3892 if (h == NULL
3893 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3894 break;
3895 /* fall through */
3896
3897 case R_PPC_ADDR32:
3898 case R_PPC_ADDR24:
3899 case R_PPC_ADDR16:
3900 case R_PPC_ADDR16_LO:
3901 case R_PPC_ADDR16_HI:
3902 case R_PPC_ADDR16_HA:
3903 case R_PPC_ADDR14:
3904 case R_PPC_ADDR14_BRTAKEN:
3905 case R_PPC_ADDR14_BRNTAKEN:
3906 case R_PPC_UADDR32:
3907 case R_PPC_UADDR16:
3908 if (h != NULL && !info->shared)
3909 {
3910 /* We may need a plt entry if the symbol turns out to be
3911 a function defined in a dynamic object. */
3912 h->plt.refcount++;
3913
3914 /* We may need a copy reloc too. */
3915 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3916 }
3917
3918 dodyn:
3919 /* If we are creating a shared library, and this is a reloc
3920 against a global symbol, or a non PC relative reloc
3921 against a local symbol, then we need to copy the reloc
3922 into the shared library. However, if we are linking with
3923 -Bsymbolic, we do not need to copy a reloc against a
3924 global symbol which is defined in an object we are
3925 including in the link (i.e., DEF_REGULAR is set). At
3926 this point we have not seen all the input files, so it is
3927 possible that DEF_REGULAR is not set now but will be set
3928 later (it is never cleared). In case of a weak definition,
3929 DEF_REGULAR may be cleared later by a strong definition in
3930 a shared library. We account for that possibility below by
3931 storing information in the dyn_relocs field of the hash
3932 table entry. A similar situation occurs when creating
3933 shared libraries and symbol visibility changes render the
3934 symbol local.
3935
3936 If on the other hand, we are creating an executable, we
3937 may need to keep relocations for symbols satisfied by a
3938 dynamic library if we manage to avoid copy relocs for the
3939 symbol. */
3940 if ((info->shared
3941 && (MUST_BE_DYN_RELOC (r_type)
3942 || (h != NULL
3943 && (! info->symbolic
3944 || h->root.type == bfd_link_hash_defweak
3945 || (h->elf_link_hash_flags
3946 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3947 || (ELIMINATE_COPY_RELOCS
3948 && !info->shared
3949 && (sec->flags & SEC_ALLOC) != 0
3950 && h != NULL
3951 && (h->root.type == bfd_link_hash_defweak
3952 || (h->elf_link_hash_flags
3953 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3954 {
3955 struct ppc_elf_dyn_relocs *p;
3956 struct ppc_elf_dyn_relocs **head;
3957
3958 #ifdef DEBUG
3959 fprintf (stderr,
3960 "ppc_elf_check_relocs needs to "
3961 "create relocation for %s\n",
3962 (h && h->root.root.string
3963 ? h->root.root.string : "<unknown>"));
3964 #endif
3965 if (sreloc == NULL)
3966 {
3967 const char *name;
3968
3969 name = (bfd_elf_string_from_elf_section
3970 (abfd,
3971 elf_elfheader (abfd)->e_shstrndx,
3972 elf_section_data (sec)->rel_hdr.sh_name));
3973 if (name == NULL)
3974 return FALSE;
3975
3976 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3977 && strcmp (bfd_get_section_name (abfd, sec),
3978 name + 5) == 0);
3979
3980 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3981 if (sreloc == NULL)
3982 {
3983 flagword flags;
3984
3985 sreloc = bfd_make_section (htab->elf.dynobj, name);
3986 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3987 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3988 if ((sec->flags & SEC_ALLOC) != 0)
3989 flags |= SEC_ALLOC | SEC_LOAD;
3990 if (sreloc == NULL
3991 || ! bfd_set_section_flags (htab->elf.dynobj,
3992 sreloc, flags)
3993 || ! bfd_set_section_alignment (htab->elf.dynobj,
3994 sreloc, 2))
3995 return FALSE;
3996 }
3997 elf_section_data (sec)->sreloc = sreloc;
3998 }
3999
4000 /* If this is a global symbol, we count the number of
4001 relocations we need for this symbol. */
4002 if (h != NULL)
4003 {
4004 head = &ppc_elf_hash_entry (h)->dyn_relocs;
4005 }
4006 else
4007 {
4008 /* Track dynamic relocs needed for local syms too.
4009 We really need local syms available to do this
4010 easily. Oh well. */
4011
4012 asection *s;
4013 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4014 sec, r_symndx);
4015 if (s == NULL)
4016 return FALSE;
4017
4018 head = ((struct ppc_elf_dyn_relocs **)
4019 &elf_section_data (s)->local_dynrel);
4020 }
4021
4022 p = *head;
4023 if (p == NULL || p->sec != sec)
4024 {
4025 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4026 if (p == NULL)
4027 return FALSE;
4028 p->next = *head;
4029 *head = p;
4030 p->sec = sec;
4031 p->count = 0;
4032 p->pc_count = 0;
4033 }
4034
4035 p->count += 1;
4036 if (!MUST_BE_DYN_RELOC (r_type))
4037 p->pc_count += 1;
4038 }
4039
4040 break;
4041 }
4042 }
4043
4044 return TRUE;
4045 }
4046
4047 /* Return the section that should be marked against GC for a given
4048 relocation. */
4049
4050 static asection *
4051 ppc_elf_gc_mark_hook (asection *sec,
4052 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4053 Elf_Internal_Rela *rel,
4054 struct elf_link_hash_entry *h,
4055 Elf_Internal_Sym *sym)
4056 {
4057 if (h != NULL)
4058 {
4059 switch (ELF32_R_TYPE (rel->r_info))
4060 {
4061 case R_PPC_GNU_VTINHERIT:
4062 case R_PPC_GNU_VTENTRY:
4063 break;
4064
4065 default:
4066 switch (h->root.type)
4067 {
4068 case bfd_link_hash_defined:
4069 case bfd_link_hash_defweak:
4070 return h->root.u.def.section;
4071
4072 case bfd_link_hash_common:
4073 return h->root.u.c.p->section;
4074
4075 default:
4076 break;
4077 }
4078 }
4079 }
4080 else
4081 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4082
4083 return NULL;
4084 }
4085
4086 /* Update the got, plt and dynamic reloc reference counts for the
4087 section being removed. */
4088
4089 static bfd_boolean
4090 ppc_elf_gc_sweep_hook (bfd *abfd,
4091 struct bfd_link_info *info,
4092 asection *sec,
4093 const Elf_Internal_Rela *relocs)
4094 {
4095 struct ppc_elf_link_hash_table *htab;
4096 Elf_Internal_Shdr *symtab_hdr;
4097 struct elf_link_hash_entry **sym_hashes;
4098 bfd_signed_vma *local_got_refcounts;
4099 const Elf_Internal_Rela *rel, *relend;
4100
4101 elf_section_data (sec)->local_dynrel = NULL;
4102
4103 htab = ppc_elf_hash_table (info);
4104 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4105 sym_hashes = elf_sym_hashes (abfd);
4106 local_got_refcounts = elf_local_got_refcounts (abfd);
4107
4108 relend = relocs + sec->reloc_count;
4109 for (rel = relocs; rel < relend; rel++)
4110 {
4111 unsigned long r_symndx;
4112 enum elf_ppc_reloc_type r_type;
4113 struct elf_link_hash_entry *h = NULL;
4114
4115 r_symndx = ELF32_R_SYM (rel->r_info);
4116 if (r_symndx >= symtab_hdr->sh_info)
4117 {
4118 struct ppc_elf_dyn_relocs **pp, *p;
4119 struct ppc_elf_link_hash_entry *eh;
4120
4121 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4122 eh = (struct ppc_elf_link_hash_entry *) h;
4123
4124 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4125 if (p->sec == sec)
4126 {
4127 /* Everything must go for SEC. */
4128 *pp = p->next;
4129 break;
4130 }
4131 }
4132
4133 r_type = ELF32_R_TYPE (rel->r_info);
4134 switch (r_type)
4135 {
4136 case R_PPC_GOT_TLSLD16:
4137 case R_PPC_GOT_TLSLD16_LO:
4138 case R_PPC_GOT_TLSLD16_HI:
4139 case R_PPC_GOT_TLSLD16_HA:
4140 htab->tlsld_got.refcount -= 1;
4141 /* Fall thru */
4142
4143 case R_PPC_GOT_TLSGD16:
4144 case R_PPC_GOT_TLSGD16_LO:
4145 case R_PPC_GOT_TLSGD16_HI:
4146 case R_PPC_GOT_TLSGD16_HA:
4147 case R_PPC_GOT_TPREL16:
4148 case R_PPC_GOT_TPREL16_LO:
4149 case R_PPC_GOT_TPREL16_HI:
4150 case R_PPC_GOT_TPREL16_HA:
4151 case R_PPC_GOT_DTPREL16:
4152 case R_PPC_GOT_DTPREL16_LO:
4153 case R_PPC_GOT_DTPREL16_HI:
4154 case R_PPC_GOT_DTPREL16_HA:
4155 case R_PPC_GOT16:
4156 case R_PPC_GOT16_LO:
4157 case R_PPC_GOT16_HI:
4158 case R_PPC_GOT16_HA:
4159 if (h != NULL)
4160 {
4161 if (h->got.refcount > 0)
4162 h->got.refcount--;
4163 }
4164 else if (local_got_refcounts != NULL)
4165 {
4166 if (local_got_refcounts[r_symndx] > 0)
4167 local_got_refcounts[r_symndx]--;
4168 }
4169 break;
4170
4171 case R_PPC_REL24:
4172 case R_PPC_REL14:
4173 case R_PPC_REL14_BRTAKEN:
4174 case R_PPC_REL14_BRNTAKEN:
4175 case R_PPC_REL32:
4176 if (h == NULL
4177 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4178 break;
4179 /* Fall thru */
4180
4181 case R_PPC_ADDR32:
4182 case R_PPC_ADDR24:
4183 case R_PPC_ADDR16:
4184 case R_PPC_ADDR16_LO:
4185 case R_PPC_ADDR16_HI:
4186 case R_PPC_ADDR16_HA:
4187 case R_PPC_ADDR14:
4188 case R_PPC_ADDR14_BRTAKEN:
4189 case R_PPC_ADDR14_BRNTAKEN:
4190 case R_PPC_UADDR32:
4191 case R_PPC_UADDR16:
4192 case R_PPC_PLT32:
4193 case R_PPC_PLTREL24:
4194 case R_PPC_PLT16_LO:
4195 case R_PPC_PLT16_HI:
4196 case R_PPC_PLT16_HA:
4197 if (h != NULL)
4198 {
4199 if (h->plt.refcount > 0)
4200 h->plt.refcount--;
4201 }
4202 break;
4203
4204 default:
4205 break;
4206 }
4207 }
4208 return TRUE;
4209 }
4210
4211 /* Set htab->tls_sec and htab->tls_get_addr. */
4212
4213 bfd_boolean
4214 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4215 {
4216 asection *tls;
4217 struct ppc_elf_link_hash_table *htab;
4218
4219 htab = ppc_elf_hash_table (info);
4220 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4221 FALSE, FALSE, TRUE);
4222
4223 for (tls = obfd->sections; tls != NULL; tls = tls->next)
4224 if ((tls->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4225 == (SEC_THREAD_LOCAL | SEC_LOAD))
4226 break;
4227 htab->tls_sec = tls;
4228
4229 return tls != NULL;
4230 }
4231
4232 /* Run through all the TLS relocs looking for optimization
4233 opportunities. */
4234
4235 bfd_boolean
4236 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4237 struct bfd_link_info *info)
4238 {
4239 bfd *ibfd;
4240 asection *sec;
4241 struct ppc_elf_link_hash_table *htab;
4242
4243 if (info->relocatable || info->shared)
4244 return TRUE;
4245
4246 htab = ppc_elf_hash_table (info);
4247 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4248 {
4249 Elf_Internal_Sym *locsyms = NULL;
4250 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4251
4252 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4253 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4254 {
4255 Elf_Internal_Rela *relstart, *rel, *relend;
4256 int expecting_tls_get_addr;
4257
4258 /* Read the relocations. */
4259 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4260 info->keep_memory);
4261 if (relstart == NULL)
4262 return FALSE;
4263
4264 expecting_tls_get_addr = 0;
4265 relend = relstart + sec->reloc_count;
4266 for (rel = relstart; rel < relend; rel++)
4267 {
4268 enum elf_ppc_reloc_type r_type;
4269 unsigned long r_symndx;
4270 struct elf_link_hash_entry *h = NULL;
4271 char *tls_mask;
4272 char tls_set, tls_clear;
4273 bfd_boolean is_local;
4274
4275 r_symndx = ELF32_R_SYM (rel->r_info);
4276 if (r_symndx >= symtab_hdr->sh_info)
4277 {
4278 struct elf_link_hash_entry **sym_hashes;
4279
4280 sym_hashes = elf_sym_hashes (ibfd);
4281 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4282 while (h->root.type == bfd_link_hash_indirect
4283 || h->root.type == bfd_link_hash_warning)
4284 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4285 }
4286
4287 is_local = FALSE;
4288 if (h == NULL
4289 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
4290 is_local = TRUE;
4291
4292 r_type = ELF32_R_TYPE (rel->r_info);
4293 switch (r_type)
4294 {
4295 case R_PPC_GOT_TLSLD16:
4296 case R_PPC_GOT_TLSLD16_LO:
4297 case R_PPC_GOT_TLSLD16_HI:
4298 case R_PPC_GOT_TLSLD16_HA:
4299 /* These relocs should never be against a symbol
4300 defined in a shared lib. Leave them alone if
4301 that turns out to be the case. */
4302 expecting_tls_get_addr = 0;
4303 htab->tlsld_got.refcount -= 1;
4304 if (!is_local)
4305 continue;
4306
4307 /* LD -> LE */
4308 tls_set = 0;
4309 tls_clear = TLS_LD;
4310 expecting_tls_get_addr = 1;
4311 break;
4312
4313 case R_PPC_GOT_TLSGD16:
4314 case R_PPC_GOT_TLSGD16_LO:
4315 case R_PPC_GOT_TLSGD16_HI:
4316 case R_PPC_GOT_TLSGD16_HA:
4317 if (is_local)
4318 /* GD -> LE */
4319 tls_set = 0;
4320 else
4321 /* GD -> IE */
4322 tls_set = TLS_TLS | TLS_TPRELGD;
4323 tls_clear = TLS_GD;
4324 expecting_tls_get_addr = 1;
4325 break;
4326
4327 case R_PPC_GOT_TPREL16:
4328 case R_PPC_GOT_TPREL16_LO:
4329 case R_PPC_GOT_TPREL16_HI:
4330 case R_PPC_GOT_TPREL16_HA:
4331 expecting_tls_get_addr = 0;
4332 if (is_local)
4333 {
4334 /* IE -> LE */
4335 tls_set = 0;
4336 tls_clear = TLS_TPREL;
4337 break;
4338 }
4339 else
4340 continue;
4341
4342 case R_PPC_REL14:
4343 case R_PPC_REL14_BRTAKEN:
4344 case R_PPC_REL14_BRNTAKEN:
4345 case R_PPC_REL24:
4346 if (expecting_tls_get_addr
4347 && h != NULL
4348 && h == htab->tls_get_addr)
4349 {
4350 if (h->plt.refcount > 0)
4351 h->plt.refcount -= 1;
4352 }
4353 expecting_tls_get_addr = 0;
4354 continue;
4355
4356 default:
4357 expecting_tls_get_addr = 0;
4358 continue;
4359 }
4360
4361 if (h != NULL)
4362 {
4363 if (tls_set == 0)
4364 {
4365 /* We managed to get rid of a got entry. */
4366 if (h->got.refcount > 0)
4367 h->got.refcount -= 1;
4368 }
4369 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4370 }
4371 else
4372 {
4373 Elf_Internal_Sym *sym;
4374 bfd_signed_vma *lgot_refs;
4375 char *lgot_masks;
4376
4377 if (locsyms == NULL)
4378 {
4379 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4380 if (locsyms == NULL)
4381 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4382 symtab_hdr->sh_info,
4383 0, NULL, NULL, NULL);
4384 if (locsyms == NULL)
4385 {
4386 if (elf_section_data (sec)->relocs != relstart)
4387 free (relstart);
4388 return FALSE;
4389 }
4390 }
4391 sym = locsyms + r_symndx;
4392 lgot_refs = elf_local_got_refcounts (ibfd);
4393 if (lgot_refs == NULL)
4394 abort ();
4395 if (tls_set == 0)
4396 {
4397 /* We managed to get rid of a got entry. */
4398 if (lgot_refs[r_symndx] > 0)
4399 lgot_refs[r_symndx] -= 1;
4400 }
4401 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4402 tls_mask = &lgot_masks[r_symndx];
4403 }
4404
4405 *tls_mask |= tls_set;
4406 *tls_mask &= ~tls_clear;
4407 }
4408
4409 if (elf_section_data (sec)->relocs != relstart)
4410 free (relstart);
4411 }
4412
4413 if (locsyms != NULL
4414 && (symtab_hdr->contents != (unsigned char *) locsyms))
4415 {
4416 if (!info->keep_memory)
4417 free (locsyms);
4418 else
4419 symtab_hdr->contents = (unsigned char *) locsyms;
4420 }
4421 }
4422 return TRUE;
4423 }
4424 \f
4425 /* Hook called by the linker routine which adds symbols from an object
4426 file. We use it to put .comm items in .sbss, and not .bss. */
4427
4428 static bfd_boolean
4429 ppc_elf_add_symbol_hook (bfd *abfd,
4430 struct bfd_link_info *info,
4431 const Elf_Internal_Sym *sym,
4432 const char **namep ATTRIBUTE_UNUSED,
4433 flagword *flagsp ATTRIBUTE_UNUSED,
4434 asection **secp,
4435 bfd_vma *valp)
4436 {
4437 if (sym->st_shndx == SHN_COMMON
4438 && !info->relocatable
4439 && sym->st_size <= elf_gp_size (abfd)
4440 && (info->hash->creator == abfd->xvec
4441 || info->hash->creator == abfd->xvec->alternative_target))
4442 {
4443 /* Common symbols less than or equal to -G nn bytes are automatically
4444 put into .sbss. */
4445 struct ppc_elf_link_hash_table *htab;
4446
4447 htab = ppc_elf_hash_table (info);
4448 if (htab->sbss == NULL)
4449 {
4450 flagword flags = SEC_IS_COMMON;
4451
4452 htab->sbss = bfd_make_section_anyway (abfd, ".sbss");
4453 if (htab->sbss == NULL
4454 || ! bfd_set_section_flags (abfd, htab->sbss, flags))
4455 return FALSE;
4456 }
4457
4458 *secp = htab->sbss;
4459 *valp = sym->st_size;
4460 }
4461
4462 return TRUE;
4463 }
4464 \f
4465 /* Finish up dynamic symbol handling. We set the contents of various
4466 dynamic sections here. */
4467
4468 static bfd_boolean
4469 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
4470 struct bfd_link_info *info,
4471 struct elf_link_hash_entry *h,
4472 Elf_Internal_Sym *sym)
4473 {
4474 struct ppc_elf_link_hash_table *htab;
4475
4476 #ifdef DEBUG
4477 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
4478 h->root.root.string);
4479 #endif
4480
4481 htab = ppc_elf_hash_table (info);
4482 BFD_ASSERT (htab->elf.dynobj != NULL);
4483
4484 if (h->plt.offset != (bfd_vma) -1)
4485 {
4486 Elf_Internal_Rela rela;
4487 bfd_byte *loc;
4488 bfd_vma reloc_index;
4489
4490 #ifdef DEBUG
4491 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
4492 #endif
4493
4494 /* This symbol has an entry in the procedure linkage table. Set
4495 it up. */
4496
4497 BFD_ASSERT (h->dynindx != -1);
4498 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
4499
4500 /* We don't need to fill in the .plt. The ppc dynamic linker
4501 will fill it in. */
4502
4503 /* Fill in the entry in the .rela.plt section. */
4504 rela.r_offset = (htab->plt->output_section->vma
4505 + htab->plt->output_offset
4506 + h->plt.offset);
4507 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
4508 rela.r_addend = 0;
4509
4510 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
4511 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
4512 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
4513 loc = (htab->relplt->contents
4514 + reloc_index * sizeof (Elf32_External_Rela));
4515 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4516
4517 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4518 {
4519 /* Mark the symbol as undefined, rather than as defined in
4520 the .plt section. Leave the value alone. */
4521 sym->st_shndx = SHN_UNDEF;
4522 /* If the symbol is weak, we do need to clear the value.
4523 Otherwise, the PLT entry would provide a definition for
4524 the symbol even if the symbol wasn't defined anywhere,
4525 and so the symbol would never be NULL. */
4526 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
4527 == 0)
4528 sym->st_value = 0;
4529 }
4530 }
4531
4532 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4533 {
4534 asection *s;
4535 Elf_Internal_Rela rela;
4536 bfd_byte *loc;
4537
4538 /* This symbols needs a copy reloc. Set it up. */
4539
4540 #ifdef DEBUG
4541 fprintf (stderr, ", copy");
4542 #endif
4543
4544 BFD_ASSERT (h->dynindx != -1);
4545
4546 if (h->size <= elf_gp_size (htab->elf.dynobj))
4547 s = htab->relsbss;
4548 else
4549 s = htab->relbss;
4550 BFD_ASSERT (s != NULL);
4551
4552 rela.r_offset = (h->root.u.def.value
4553 + h->root.u.def.section->output_section->vma
4554 + h->root.u.def.section->output_offset);
4555 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
4556 rela.r_addend = 0;
4557 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4558 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4559 }
4560
4561 #ifdef DEBUG
4562 fprintf (stderr, "\n");
4563 #endif
4564
4565 /* Mark some specially defined symbols as absolute. */
4566 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4567 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
4568 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
4569 sym->st_shndx = SHN_ABS;
4570
4571 return TRUE;
4572 }
4573 \f
4574 /* Finish up the dynamic sections. */
4575
4576 static bfd_boolean
4577 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
4578 struct bfd_link_info *info)
4579 {
4580 asection *sdyn;
4581 struct ppc_elf_link_hash_table *htab;
4582
4583 #ifdef DEBUG
4584 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
4585 #endif
4586
4587 htab = ppc_elf_hash_table (info);
4588 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
4589
4590 if (htab->elf.dynamic_sections_created)
4591 {
4592 Elf32_External_Dyn *dyncon, *dynconend;
4593
4594 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
4595
4596 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4597 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4598 for (; dyncon < dynconend; dyncon++)
4599 {
4600 Elf_Internal_Dyn dyn;
4601 asection *s;
4602
4603 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
4604
4605 switch (dyn.d_tag)
4606 {
4607 case DT_PLTGOT:
4608 s = htab->plt;
4609 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4610 break;
4611
4612 case DT_PLTRELSZ:
4613 dyn.d_un.d_val = htab->relplt->_raw_size;
4614 break;
4615
4616 case DT_JMPREL:
4617 s = htab->relplt;
4618 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4619 break;
4620
4621 default:
4622 continue;
4623 }
4624
4625 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4626 }
4627 }
4628
4629 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
4630 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
4631 if (htab->got)
4632 {
4633 unsigned char *contents = htab->got->contents;
4634 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
4635
4636 if (sdyn == NULL)
4637 bfd_put_32 (output_bfd, 0, contents + 4);
4638 else
4639 bfd_put_32 (output_bfd,
4640 sdyn->output_section->vma + sdyn->output_offset,
4641 contents + 4);
4642
4643 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
4644 }
4645
4646 return TRUE;
4647 }
4648 \f
4649 /* The RELOCATE_SECTION function is called by the ELF backend linker
4650 to handle the relocations for a section.
4651
4652 The relocs are always passed as Rela structures; if the section
4653 actually uses Rel structures, the r_addend field will always be
4654 zero.
4655
4656 This function is responsible for adjust the section contents as
4657 necessary, and (if using Rela relocs and generating a
4658 relocatable output file) adjusting the reloc addend as
4659 necessary.
4660
4661 This function does not have to worry about setting the reloc
4662 address or the reloc symbol index.
4663
4664 LOCAL_SYMS is a pointer to the swapped in local symbols.
4665
4666 LOCAL_SECTIONS is an array giving the section in the input file
4667 corresponding to the st_shndx field of each local symbol.
4668
4669 The global hash table entry for the global symbols can be found
4670 via elf_sym_hashes (input_bfd).
4671
4672 When generating relocatable output, this function must handle
4673 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
4674 going to be the section symbol corresponding to the output
4675 section, which means that the addend must be adjusted
4676 accordingly. */
4677
4678 static bfd_boolean
4679 ppc_elf_relocate_section (bfd *output_bfd,
4680 struct bfd_link_info *info,
4681 bfd *input_bfd,
4682 asection *input_section,
4683 bfd_byte *contents,
4684 Elf_Internal_Rela *relocs,
4685 Elf_Internal_Sym *local_syms,
4686 asection **local_sections)
4687 {
4688 Elf_Internal_Shdr *symtab_hdr;
4689 struct elf_link_hash_entry **sym_hashes;
4690 struct ppc_elf_link_hash_table *htab;
4691 Elf_Internal_Rela *rel;
4692 Elf_Internal_Rela *relend;
4693 Elf_Internal_Rela outrel;
4694 bfd_byte *loc;
4695 asection *sreloc = NULL;
4696 bfd_vma *local_got_offsets;
4697 bfd_boolean ret = TRUE;
4698
4699 #ifdef DEBUG
4700 fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, "
4701 "%ld relocations%s\n",
4702 bfd_archive_filename (input_bfd),
4703 bfd_section_name(input_bfd, input_section),
4704 (long) input_section->reloc_count,
4705 (info->relocatable) ? " (relocatable)" : "");
4706 #endif
4707
4708 if (info->relocatable)
4709 return TRUE;
4710
4711 /* Initialize howto table if not already done. */
4712 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4713 ppc_elf_howto_init ();
4714
4715 htab = ppc_elf_hash_table (info);
4716 local_got_offsets = elf_local_got_offsets (input_bfd);
4717 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4718 sym_hashes = elf_sym_hashes (input_bfd);
4719 rel = relocs;
4720 relend = relocs + input_section->reloc_count;
4721 for (; rel < relend; rel++)
4722 {
4723 enum elf_ppc_reloc_type r_type;
4724 bfd_vma addend;
4725 bfd_reloc_status_type r;
4726 Elf_Internal_Sym *sym;
4727 asection *sec;
4728 struct elf_link_hash_entry *h;
4729 const char *sym_name;
4730 reloc_howto_type *howto;
4731 unsigned long r_symndx;
4732 bfd_vma relocation;
4733 bfd_vma branch_bit, insn, from;
4734 bfd_boolean unresolved_reloc;
4735 bfd_boolean warned;
4736 unsigned int tls_type, tls_mask, tls_gd;
4737
4738 r_type = ELF32_R_TYPE (rel->r_info);
4739 sym = NULL;
4740 sec = NULL;
4741 h = NULL;
4742 unresolved_reloc = FALSE;
4743 warned = FALSE;
4744 r_symndx = ELF32_R_SYM (rel->r_info);
4745 if (r_symndx < symtab_hdr->sh_info)
4746 {
4747 sym = local_syms + r_symndx;
4748 sec = local_sections[r_symndx];
4749 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
4750
4751 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
4752 }
4753 else
4754 {
4755 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4756 while (h->root.type == bfd_link_hash_indirect
4757 || h->root.type == bfd_link_hash_warning)
4758 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4759 sym_name = h->root.root.string;
4760
4761 relocation = 0;
4762 if (h->root.type == bfd_link_hash_defined
4763 || h->root.type == bfd_link_hash_defweak)
4764 {
4765 sec = h->root.u.def.section;
4766 /* Set a flag that will be cleared later if we find a
4767 relocation value for this symbol. output_section
4768 is typically NULL for symbols satisfied by a shared
4769 library. */
4770 if (sec->output_section == NULL)
4771 unresolved_reloc = TRUE;
4772 else
4773 relocation = (h->root.u.def.value
4774 + sec->output_section->vma
4775 + sec->output_offset);
4776 }
4777 else if (h->root.type == bfd_link_hash_undefweak)
4778 ;
4779 else if (!info->executable
4780 && !info->no_undefined
4781 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
4782 ;
4783 else
4784 {
4785 if (! ((*info->callbacks->undefined_symbol)
4786 (info, h->root.root.string, input_bfd, input_section,
4787 rel->r_offset, (!info->shared
4788 || info->no_undefined
4789 || ELF_ST_VISIBILITY (h->other)))))
4790 return FALSE;
4791 warned = TRUE;
4792 }
4793 }
4794
4795 /* TLS optimizations. Replace instruction sequences and relocs
4796 based on information we collected in tls_optimize. We edit
4797 RELOCS so that --emit-relocs will output something sensible
4798 for the final instruction stream. */
4799 tls_mask = 0;
4800 tls_gd = 0;
4801 if (IS_PPC_TLS_RELOC (r_type))
4802 {
4803 if (h != NULL)
4804 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
4805 else if (local_got_offsets != NULL)
4806 {
4807 char *lgot_masks;
4808 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
4809 tls_mask = lgot_masks[r_symndx];
4810 }
4811 }
4812
4813 /* Ensure reloc mapping code below stays sane. */
4814 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
4815 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
4816 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
4817 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
4818 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
4819 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
4820 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
4821 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
4822 abort ();
4823 switch (r_type)
4824 {
4825 default:
4826 break;
4827
4828 case R_PPC_GOT_TPREL16:
4829 case R_PPC_GOT_TPREL16_LO:
4830 if (tls_mask != 0
4831 && (tls_mask & TLS_TPREL) == 0)
4832 {
4833 bfd_vma insn;
4834 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
4835 insn &= 31 << 21;
4836 insn |= 0x3c020000; /* addis 0,2,0 */
4837 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
4838 r_type = R_PPC_TPREL16_HA;
4839 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4840 }
4841 break;
4842
4843 case R_PPC_TLS:
4844 if (tls_mask != 0
4845 && (tls_mask & TLS_TPREL) == 0)
4846 {
4847 bfd_vma insn, rtra;
4848 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4849 if ((insn & ((31 << 26) | (31 << 11)))
4850 == ((31 << 26) | (2 << 11)))
4851 rtra = insn & ((1 << 26) - (1 << 16));
4852 else if ((insn & ((31 << 26) | (31 << 16)))
4853 == ((31 << 26) | (2 << 16)))
4854 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
4855 else
4856 abort ();
4857 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
4858 /* add -> addi. */
4859 insn = 14 << 26;
4860 else if ((insn & (31 << 1)) == 23 << 1
4861 && ((insn & (31 << 6)) < 14 << 6
4862 || ((insn & (31 << 6)) >= 16 << 6
4863 && (insn & (31 << 6)) < 24 << 6)))
4864 /* load and store indexed -> dform. */
4865 insn = (32 | ((insn >> 6) & 31)) << 26;
4866 else if ((insn & (31 << 1)) == 21 << 1
4867 && (insn & (0x1a << 6)) == 0)
4868 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
4869 insn = (((58 | ((insn >> 6) & 4)) << 26)
4870 | ((insn >> 6) & 1));
4871 else if ((insn & (31 << 1)) == 21 << 1
4872 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
4873 /* lwax -> lwa. */
4874 insn = (58 << 26) | 2;
4875 else
4876 abort ();
4877 insn |= rtra;
4878 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4879 r_type = R_PPC_TPREL16_LO;
4880 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4881 /* Was PPC_TLS which sits on insn boundary, now
4882 PPC_TPREL16_LO which is at insn+2. */
4883 rel->r_offset += 2;
4884 }
4885 break;
4886
4887 case R_PPC_GOT_TLSGD16_HI:
4888 case R_PPC_GOT_TLSGD16_HA:
4889 tls_gd = TLS_TPRELGD;
4890 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4891 goto tls_gdld_hi;
4892 break;
4893
4894 case R_PPC_GOT_TLSLD16_HI:
4895 case R_PPC_GOT_TLSLD16_HA:
4896 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4897 {
4898 tls_gdld_hi:
4899 if ((tls_mask & tls_gd) != 0)
4900 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4901 + R_PPC_GOT_TPREL16);
4902 else
4903 {
4904 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
4905 rel->r_offset -= 2;
4906 r_type = R_PPC_NONE;
4907 }
4908 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4909 }
4910 break;
4911
4912 case R_PPC_GOT_TLSGD16:
4913 case R_PPC_GOT_TLSGD16_LO:
4914 tls_gd = TLS_TPRELGD;
4915 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4916 goto tls_get_addr_check;
4917 break;
4918
4919 case R_PPC_GOT_TLSLD16:
4920 case R_PPC_GOT_TLSLD16_LO:
4921 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4922 {
4923 tls_get_addr_check:
4924 if (rel + 1 < relend)
4925 {
4926 enum elf_ppc_reloc_type r_type2;
4927 unsigned long r_symndx2;
4928 struct elf_link_hash_entry *h2;
4929 bfd_vma insn1, insn2;
4930 bfd_vma offset;
4931
4932 /* The next instruction should be a call to
4933 __tls_get_addr. Peek at the reloc to be sure. */
4934 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4935 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4936 if (r_symndx2 < symtab_hdr->sh_info
4937 || (r_type2 != R_PPC_REL14
4938 && r_type2 != R_PPC_REL14_BRTAKEN
4939 && r_type2 != R_PPC_REL14_BRNTAKEN
4940 && r_type2 != R_PPC_REL24
4941 && r_type2 != R_PPC_PLTREL24))
4942 break;
4943
4944 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4945 while (h2->root.type == bfd_link_hash_indirect
4946 || h2->root.type == bfd_link_hash_warning)
4947 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
4948 if (h2 == NULL || h2 != htab->tls_get_addr)
4949 break;
4950
4951 /* OK, it checks out. Replace the call. */
4952 offset = rel[1].r_offset;
4953 insn1 = bfd_get_32 (output_bfd,
4954 contents + rel->r_offset - 2);
4955 if ((tls_mask & tls_gd) != 0)
4956 {
4957 /* IE */
4958 insn1 &= (1 << 26) - 1;
4959 insn1 |= 32 << 26; /* lwz */
4960 insn2 = 0x7c631214; /* add 3,3,2 */
4961 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
4962 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4963 + R_PPC_GOT_TPREL16);
4964 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4965 }
4966 else
4967 {
4968 /* LE */
4969 insn1 = 0x3c620000; /* addis 3,2,0 */
4970 insn2 = 0x38630000; /* addi 3,3,0 */
4971 if (tls_gd == 0)
4972 {
4973 /* Was an LD reloc. */
4974 r_symndx = 0;
4975 rel->r_addend = htab->tls_sec->vma + DTP_OFFSET;
4976 rel[1].r_addend = htab->tls_sec->vma + DTP_OFFSET;
4977 }
4978 r_type = R_PPC_TPREL16_HA;
4979 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4980 rel[1].r_info = ELF32_R_INFO (r_symndx,
4981 R_PPC_TPREL16_LO);
4982 rel[1].r_offset += 2;
4983 }
4984 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
4985 bfd_put_32 (output_bfd, insn2, contents + offset);
4986 if (tls_gd == 0)
4987 {
4988 /* We changed the symbol on an LD reloc. Start over
4989 in order to get h, sym, sec etc. right. */
4990 rel--;
4991 continue;
4992 }
4993 }
4994 }
4995 break;
4996 }
4997
4998 /* Handle other relocations that tweak non-addend part of insn. */
4999 branch_bit = 0;
5000 switch (r_type)
5001 {
5002 default:
5003 break;
5004
5005 /* Branch taken prediction relocations. */
5006 case R_PPC_ADDR14_BRTAKEN:
5007 case R_PPC_REL14_BRTAKEN:
5008 branch_bit = BRANCH_PREDICT_BIT;
5009 /* Fall thru */
5010
5011 /* Branch not taken predicition relocations. */
5012 case R_PPC_ADDR14_BRNTAKEN:
5013 case R_PPC_REL14_BRNTAKEN:
5014 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5015 insn &= ~BRANCH_PREDICT_BIT;
5016 insn |= branch_bit;
5017
5018 from = (rel->r_offset
5019 + input_section->output_offset
5020 + input_section->output_section->vma);
5021
5022 /* Invert 'y' bit if not the default. */
5023 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5024 insn ^= BRANCH_PREDICT_BIT;
5025
5026 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5027 break;
5028 }
5029
5030 addend = rel->r_addend;
5031 tls_type = 0;
5032 howto = NULL;
5033 if (r_type < R_PPC_max)
5034 howto = ppc_elf_howto_table[r_type];
5035 switch (r_type)
5036 {
5037 default:
5038 (*_bfd_error_handler)
5039 (_("%s: unknown relocation type %d for symbol %s"),
5040 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
5041
5042 bfd_set_error (bfd_error_bad_value);
5043 ret = FALSE;
5044 continue;
5045
5046 case R_PPC_NONE:
5047 case R_PPC_TLS:
5048 case R_PPC_EMB_MRKREF:
5049 case R_PPC_GNU_VTINHERIT:
5050 case R_PPC_GNU_VTENTRY:
5051 continue;
5052
5053 /* GOT16 relocations. Like an ADDR16 using the symbol's
5054 address in the GOT as relocation value instead of the
5055 symbol's value itself. Also, create a GOT entry for the
5056 symbol and put the symbol value there. */
5057 case R_PPC_GOT_TLSGD16:
5058 case R_PPC_GOT_TLSGD16_LO:
5059 case R_PPC_GOT_TLSGD16_HI:
5060 case R_PPC_GOT_TLSGD16_HA:
5061 tls_type = TLS_TLS | TLS_GD;
5062 goto dogot;
5063
5064 case R_PPC_GOT_TLSLD16:
5065 case R_PPC_GOT_TLSLD16_LO:
5066 case R_PPC_GOT_TLSLD16_HI:
5067 case R_PPC_GOT_TLSLD16_HA:
5068 tls_type = TLS_TLS | TLS_LD;
5069 goto dogot;
5070
5071 case R_PPC_GOT_TPREL16:
5072 case R_PPC_GOT_TPREL16_LO:
5073 case R_PPC_GOT_TPREL16_HI:
5074 case R_PPC_GOT_TPREL16_HA:
5075 tls_type = TLS_TLS | TLS_TPREL;
5076 goto dogot;
5077
5078 case R_PPC_GOT_DTPREL16:
5079 case R_PPC_GOT_DTPREL16_LO:
5080 case R_PPC_GOT_DTPREL16_HI:
5081 case R_PPC_GOT_DTPREL16_HA:
5082 tls_type = TLS_TLS | TLS_DTPREL;
5083 goto dogot;
5084
5085 case R_PPC_GOT16:
5086 case R_PPC_GOT16_LO:
5087 case R_PPC_GOT16_HI:
5088 case R_PPC_GOT16_HA:
5089 dogot:
5090 {
5091 /* Relocation is to the entry for this symbol in the global
5092 offset table. */
5093 bfd_vma off;
5094 bfd_vma *offp;
5095 unsigned long indx;
5096
5097 if (htab->got == NULL)
5098 abort ();
5099
5100 indx = 0;
5101 if (tls_type == (TLS_TLS | TLS_LD)
5102 && (h == NULL
5103 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
5104 offp = &htab->tlsld_got.offset;
5105 else if (h != NULL)
5106 {
5107 bfd_boolean dyn;
5108 dyn = htab->elf.dynamic_sections_created;
5109 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5110 || (info->shared
5111 && SYMBOL_REFERENCES_LOCAL (info, h)))
5112 /* This is actually a static link, or it is a
5113 -Bsymbolic link and the symbol is defined
5114 locally, or the symbol was forced to be local
5115 because of a version file. */
5116 ;
5117 else
5118 {
5119 indx = h->dynindx;
5120 unresolved_reloc = FALSE;
5121 }
5122 offp = &h->got.offset;
5123 }
5124 else
5125 {
5126 if (local_got_offsets == NULL)
5127 abort ();
5128 offp = &local_got_offsets[r_symndx];
5129 }
5130
5131 /* The offset must always be a multiple of 4. We use the
5132 least significant bit to record whether we have already
5133 processed this entry. */
5134 off = *offp;
5135 if ((off & 1) != 0)
5136 off &= ~1;
5137 else
5138 {
5139 unsigned int tls_m = (tls_mask
5140 & (TLS_LD | TLS_GD | TLS_DTPREL
5141 | TLS_TPREL | TLS_TPRELGD));
5142
5143 if (offp == &htab->tlsld_got.offset)
5144 tls_m = TLS_LD;
5145 else if (h == NULL
5146 || !(h->elf_link_hash_flags
5147 & ELF_LINK_HASH_DEF_DYNAMIC))
5148 tls_m &= ~TLS_LD;
5149
5150 /* We might have multiple got entries for this sym.
5151 Initialize them all. */
5152 do
5153 {
5154 int tls_ty = 0;
5155
5156 if ((tls_m & TLS_LD) != 0)
5157 {
5158 tls_ty = TLS_TLS | TLS_LD;
5159 tls_m &= ~TLS_LD;
5160 }
5161 else if ((tls_m & TLS_GD) != 0)
5162 {
5163 tls_ty = TLS_TLS | TLS_GD;
5164 tls_m &= ~TLS_GD;
5165 }
5166 else if ((tls_m & TLS_DTPREL) != 0)
5167 {
5168 tls_ty = TLS_TLS | TLS_DTPREL;
5169 tls_m &= ~TLS_DTPREL;
5170 }
5171 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5172 {
5173 tls_ty = TLS_TLS | TLS_TPREL;
5174 tls_m = 0;
5175 }
5176
5177 /* Generate relocs for the dynamic linker. */
5178 if ((info->shared || indx != 0)
5179 && (h == NULL
5180 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5181 || h->root.type != bfd_link_hash_undefweak))
5182 {
5183 outrel.r_offset = (htab->got->output_section->vma
5184 + htab->got->output_offset
5185 + off);
5186 outrel.r_addend = 0;
5187 if (tls_ty & (TLS_LD | TLS_GD))
5188 {
5189 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5190 if (tls_ty == (TLS_TLS | TLS_GD))
5191 {
5192 loc = htab->relgot->contents;
5193 loc += (htab->relgot->reloc_count++
5194 * sizeof (Elf32_External_Rela));
5195 bfd_elf32_swap_reloca_out (output_bfd,
5196 &outrel, loc);
5197 outrel.r_offset += 4;
5198 outrel.r_info
5199 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5200 }
5201 }
5202 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5203 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5204 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5205 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5206 else if (indx == 0)
5207 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5208 else
5209 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5210 if (indx == 0)
5211 {
5212 outrel.r_addend += relocation;
5213 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5214 outrel.r_addend -= htab->tls_sec->vma;
5215 }
5216 loc = htab->relgot->contents;
5217 loc += (htab->relgot->reloc_count++
5218 * sizeof (Elf32_External_Rela));
5219 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5220 }
5221
5222 /* Init the .got section contents if we're not
5223 emitting a reloc. */
5224 else
5225 {
5226 bfd_vma value = relocation;
5227
5228 if (tls_ty == (TLS_TLS | TLS_LD))
5229 value = 1;
5230 else if (tls_ty != 0)
5231 {
5232 value -= htab->tls_sec->vma + DTP_OFFSET;
5233 if (tls_ty == (TLS_TLS | TLS_TPREL))
5234 value += DTP_OFFSET - TP_OFFSET;
5235
5236 if (tls_ty == (TLS_TLS | TLS_GD))
5237 {
5238 bfd_put_32 (output_bfd, value,
5239 htab->got->contents + off + 4);
5240 value = 1;
5241 }
5242 }
5243 bfd_put_32 (output_bfd, value,
5244 htab->got->contents + off);
5245 }
5246
5247 off += 4;
5248 if (tls_ty & (TLS_LD | TLS_GD))
5249 off += 4;
5250 }
5251 while (tls_m != 0);
5252
5253 off = *offp;
5254 *offp = off | 1;
5255 }
5256
5257 if (off >= (bfd_vma) -2)
5258 abort ();
5259
5260 if ((tls_type & TLS_TLS) != 0)
5261 {
5262 if (tls_type != (TLS_TLS | TLS_LD))
5263 {
5264 if ((tls_mask & TLS_LD) != 0
5265 && !(h == NULL
5266 || !(h->elf_link_hash_flags
5267 & ELF_LINK_HASH_DEF_DYNAMIC)))
5268 off += 8;
5269 if (tls_type != (TLS_TLS | TLS_GD))
5270 {
5271 if ((tls_mask & TLS_GD) != 0)
5272 off += 8;
5273 if (tls_type != (TLS_TLS | TLS_DTPREL))
5274 {
5275 if ((tls_mask & TLS_DTPREL) != 0)
5276 off += 4;
5277 }
5278 }
5279 }
5280 }
5281
5282 relocation = htab->got->output_offset + off - 4;
5283
5284 /* Addends on got relocations don't make much sense.
5285 x+off@got is actually x@got+off, and since the got is
5286 generated by a hash table traversal, the value in the
5287 got at entry m+n bears little relation to the entry m. */
5288 if (addend != 0)
5289 (*_bfd_error_handler)
5290 (_("%s(%s+0x%lx): non-zero addend on %s reloc against `%s'"),
5291 bfd_archive_filename (input_bfd),
5292 bfd_get_section_name (input_bfd, input_section),
5293 (long) rel->r_offset,
5294 howto->name,
5295 sym_name);
5296 }
5297 break;
5298
5299 /* Relocations that need no special processing. */
5300 case R_PPC_LOCAL24PC:
5301 /* It makes no sense to point a local relocation
5302 at a symbol not in this object. */
5303 if (unresolved_reloc)
5304 {
5305 if (! (*info->callbacks->undefined_symbol) (info,
5306 h->root.root.string,
5307 input_bfd,
5308 input_section,
5309 rel->r_offset,
5310 TRUE))
5311 return FALSE;
5312 continue;
5313 }
5314 break;
5315
5316 case R_PPC_DTPREL16:
5317 case R_PPC_DTPREL16_LO:
5318 case R_PPC_DTPREL16_HI:
5319 case R_PPC_DTPREL16_HA:
5320 addend -= htab->tls_sec->vma + DTP_OFFSET;
5321 break;
5322
5323 /* Relocations that may need to be propagated if this is a shared
5324 object. */
5325 case R_PPC_TPREL16:
5326 case R_PPC_TPREL16_LO:
5327 case R_PPC_TPREL16_HI:
5328 case R_PPC_TPREL16_HA:
5329 addend -= htab->tls_sec->vma + TP_OFFSET;
5330 /* The TPREL16 relocs shouldn't really be used in shared
5331 libs as they will result in DT_TEXTREL being set, but
5332 support them anyway. */
5333 goto dodyn;
5334
5335 case R_PPC_TPREL32:
5336 addend -= htab->tls_sec->vma + TP_OFFSET;
5337 goto dodyn;
5338
5339 case R_PPC_DTPREL32:
5340 addend -= htab->tls_sec->vma + DTP_OFFSET;
5341 goto dodyn;
5342
5343 case R_PPC_DTPMOD32:
5344 relocation = 1;
5345 addend = 0;
5346 goto dodyn;
5347
5348 case R_PPC_REL24:
5349 case R_PPC_REL32:
5350 case R_PPC_REL14:
5351 case R_PPC_REL14_BRTAKEN:
5352 case R_PPC_REL14_BRNTAKEN:
5353 /* If these relocations are not to a named symbol, they can be
5354 handled right here, no need to bother the dynamic linker. */
5355 if (SYMBOL_REFERENCES_LOCAL (info, h)
5356 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5357 break;
5358 /* fall through */
5359
5360 /* Relocations that always need to be propagated if this is a shared
5361 object. */
5362 case R_PPC_ADDR32:
5363 case R_PPC_ADDR24:
5364 case R_PPC_ADDR16:
5365 case R_PPC_ADDR16_LO:
5366 case R_PPC_ADDR16_HI:
5367 case R_PPC_ADDR16_HA:
5368 case R_PPC_ADDR14:
5369 case R_PPC_ADDR14_BRTAKEN:
5370 case R_PPC_ADDR14_BRNTAKEN:
5371 case R_PPC_UADDR32:
5372 case R_PPC_UADDR16:
5373 /* r_symndx will be zero only for relocs against symbols
5374 from removed linkonce sections, or sections discarded by
5375 a linker script. */
5376 dodyn:
5377 if (r_symndx == 0)
5378 break;
5379 /* Fall thru. */
5380
5381 if ((info->shared
5382 && (h == NULL
5383 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5384 || h->root.type != bfd_link_hash_undefweak)
5385 && (MUST_BE_DYN_RELOC (r_type)
5386 || !SYMBOL_CALLS_LOCAL (info, h)))
5387 || (ELIMINATE_COPY_RELOCS
5388 && !info->shared
5389 && (input_section->flags & SEC_ALLOC) != 0
5390 && h != NULL
5391 && h->dynindx != -1
5392 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5393 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5394 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
5395 {
5396 int skip;
5397
5398 #ifdef DEBUG
5399 fprintf (stderr, "ppc_elf_relocate_section needs to "
5400 "create relocation for %s\n",
5401 (h && h->root.root.string
5402 ? h->root.root.string : "<unknown>"));
5403 #endif
5404
5405 /* When generating a shared object, these relocations
5406 are copied into the output file to be resolved at run
5407 time. */
5408 if (sreloc == NULL)
5409 {
5410 const char *name;
5411
5412 name = (bfd_elf_string_from_elf_section
5413 (input_bfd,
5414 elf_elfheader (input_bfd)->e_shstrndx,
5415 elf_section_data (input_section)->rel_hdr.sh_name));
5416 if (name == NULL)
5417 return FALSE;
5418
5419 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
5420 && strcmp (bfd_get_section_name (input_bfd,
5421 input_section),
5422 name + 5) == 0);
5423
5424 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
5425 BFD_ASSERT (sreloc != NULL);
5426 }
5427
5428 skip = 0;
5429
5430 outrel.r_offset =
5431 _bfd_elf_section_offset (output_bfd, info, input_section,
5432 rel->r_offset);
5433 if (outrel.r_offset == (bfd_vma) -1
5434 || outrel.r_offset == (bfd_vma) -2)
5435 skip = (int) outrel.r_offset;
5436 outrel.r_offset += (input_section->output_section->vma
5437 + input_section->output_offset);
5438
5439 if (skip)
5440 memset (&outrel, 0, sizeof outrel);
5441 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
5442 {
5443 unresolved_reloc = FALSE;
5444 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5445 outrel.r_addend = rel->r_addend;
5446 }
5447 else
5448 {
5449 outrel.r_addend = relocation + rel->r_addend;
5450
5451 if (r_type == R_PPC_ADDR32)
5452 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
5453 else
5454 {
5455 long indx;
5456
5457 if (bfd_is_abs_section (sec))
5458 indx = 0;
5459 else if (sec == NULL || sec->owner == NULL)
5460 {
5461 bfd_set_error (bfd_error_bad_value);
5462 return FALSE;
5463 }
5464 else
5465 {
5466 asection *osec;
5467
5468 /* We are turning this relocation into one
5469 against a section symbol. It would be
5470 proper to subtract the symbol's value,
5471 osec->vma, from the emitted reloc addend,
5472 but ld.so expects buggy relocs. */
5473 osec = sec->output_section;
5474 indx = elf_section_data (osec)->dynindx;
5475 BFD_ASSERT (indx > 0);
5476 #ifdef DEBUG
5477 if (indx <= 0)
5478 printf ("indx=%d section=%s flags=%08x name=%s\n",
5479 indx, osec->name, osec->flags,
5480 h->root.root.string);
5481 #endif
5482 }
5483
5484 outrel.r_info = ELF32_R_INFO (indx, r_type);
5485 }
5486 }
5487
5488 loc = sreloc->contents;
5489 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5490 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5491
5492 if (skip == -1)
5493 continue;
5494
5495 /* This reloc will be computed at runtime. We clear the memory
5496 so that it contains predictable value. */
5497 if (! skip
5498 && ((input_section->flags & SEC_ALLOC) != 0
5499 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
5500 {
5501 relocation = howto->pc_relative ? outrel.r_offset : 0;
5502 addend = 0;
5503 break;
5504 }
5505 }
5506 break;
5507
5508 case R_PPC_RELAX32:
5509 {
5510 unsigned long r_symndx;
5511 Elf_Internal_Sym *sym;
5512 asection *sym_sec;
5513 bfd_byte *hit_addr = 0;
5514 bfd_vma value = 0;
5515
5516 r_symndx = ELF32_R_SYM (rel->r_info);
5517
5518 if (r_symndx < symtab_hdr->sh_info)
5519 {
5520 sym = local_syms + r_symndx;
5521 sym_sec = local_sections[r_symndx];
5522
5523 value = _bfd_elf_rela_local_sym (output_bfd, sym, sym_sec, rel);
5524 }
5525 else
5526 {
5527 long indx;
5528
5529 indx = r_symndx - symtab_hdr->sh_info;
5530 h = elf_sym_hashes (input_bfd)[indx];
5531 while (h->root.type == bfd_link_hash_indirect
5532 || h->root.type == bfd_link_hash_warning)
5533 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5534
5535 value = 0;
5536 if (h->root.type == bfd_link_hash_defined
5537 || h->root.type == bfd_link_hash_defweak)
5538 {
5539 sym_sec = h->root.u.def.section;
5540
5541 /* Detect the cases that sym_sec->output_section is
5542 expected to be NULL -- all cases in which the symbol
5543 is defined in another shared module. This includes
5544 PLT relocs for which we've created a PLT entry and
5545 other relocs for which we're prepared to create
5546 dynamic relocations. */
5547 /* ??? Just accept it NULL and continue. */
5548
5549 if (sym_sec->output_section != NULL)
5550 {
5551 value = (h->root.u.def.value
5552 + sym_sec->output_section->vma
5553 + sym_sec->output_offset);
5554 }
5555 }
5556 else if (info->shared
5557 && !info->no_undefined
5558 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5559 ;
5560 else
5561 {
5562 if (! ((*info->callbacks->undefined_symbol)
5563 (info, h->root.root.string, input_bfd,
5564 input_section, rel->r_offset,
5565 (!info->shared || info->no_undefined
5566 || ELF_ST_VISIBILITY (h->other)))))
5567 return FALSE;
5568 continue;
5569 }
5570 }
5571 hit_addr = contents + rel->r_offset;
5572 value += rel->r_addend;
5573
5574 r = ppc_elf_install_value (output_bfd, hit_addr, value, r_type);
5575 if (r != bfd_reloc_ok)
5576 break;
5577 else
5578 continue;
5579 }
5580
5581 /* Indirect .sdata relocation. */
5582 case R_PPC_EMB_SDAI16:
5583 BFD_ASSERT (htab->sdata != NULL);
5584 relocation
5585 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5586 htab->sdata, h, relocation,
5587 rel, R_PPC_RELATIVE);
5588 break;
5589
5590 /* Indirect .sdata2 relocation. */
5591 case R_PPC_EMB_SDA2I16:
5592 BFD_ASSERT (htab->sdata2 != NULL);
5593 relocation
5594 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5595 htab->sdata2, h, relocation,
5596 rel, R_PPC_RELATIVE);
5597 break;
5598
5599 /* Handle the TOC16 reloc. We want to use the offset within the .got
5600 section, not the actual VMA. This is appropriate when generating
5601 an embedded ELF object, for which the .got section acts like the
5602 AIX .toc section. */
5603 case R_PPC_TOC16: /* phony GOT16 relocations */
5604 BFD_ASSERT (sec != NULL);
5605 BFD_ASSERT (bfd_is_und_section (sec)
5606 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
5607 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)
5608
5609 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
5610 break;
5611
5612 case R_PPC_PLTREL24:
5613 /* Relocation is to the entry for this symbol in the
5614 procedure linkage table. */
5615 BFD_ASSERT (h != NULL);
5616
5617 if (h->plt.offset == (bfd_vma) -1
5618 || htab->plt == NULL)
5619 {
5620 /* We didn't make a PLT entry for this symbol. This
5621 happens when statically linking PIC code, or when
5622 using -Bsymbolic. */
5623 break;
5624 }
5625
5626 unresolved_reloc = FALSE;
5627 relocation = (htab->plt->output_section->vma
5628 + htab->plt->output_offset
5629 + h->plt.offset);
5630 break;
5631
5632 /* Relocate against _SDA_BASE_. */
5633 case R_PPC_SDAREL16:
5634 {
5635 const char *name;
5636 const struct elf_link_hash_entry *sh;
5637
5638 BFD_ASSERT (sec != NULL);
5639 name = bfd_get_section_name (abfd, sec->output_section);
5640 if (! ((strncmp (name, ".sdata", 6) == 0
5641 && (name[6] == 0 || name[6] == '.'))
5642 || (strncmp (name, ".sbss", 5) == 0
5643 && (name[5] == 0 || name[5] == '.'))))
5644 {
5645 (*_bfd_error_handler)
5646 (_("%s: the target (%s) of a %s relocation is "
5647 "in the wrong output section (%s)"),
5648 bfd_archive_filename (input_bfd),
5649 sym_name,
5650 howto->name,
5651 name);
5652 }
5653 sh = htab->sdata->sym_hash;
5654 addend -= (sh->root.u.def.value
5655 + sh->root.u.def.section->output_section->vma
5656 + sh->root.u.def.section->output_offset);
5657 }
5658 break;
5659
5660 /* Relocate against _SDA2_BASE_. */
5661 case R_PPC_EMB_SDA2REL:
5662 {
5663 const char *name;
5664 const struct elf_link_hash_entry *sh;
5665
5666 BFD_ASSERT (sec != NULL);
5667 name = bfd_get_section_name (abfd, sec->output_section);
5668 if (! (strncmp (name, ".sdata2", 7) == 0
5669 || strncmp (name, ".sbss2", 6) == 0))
5670 {
5671 (*_bfd_error_handler)
5672 (_("%s: the target (%s) of a %s relocation is "
5673 "in the wrong output section (%s)"),
5674 bfd_archive_filename (input_bfd),
5675 sym_name,
5676 howto->name,
5677 name);
5678
5679 bfd_set_error (bfd_error_bad_value);
5680 ret = FALSE;
5681 continue;
5682 }
5683 sh = htab->sdata2->sym_hash;
5684 addend -= (sh->root.u.def.value
5685 + sh->root.u.def.section->output_section->vma
5686 + sh->root.u.def.section->output_offset);
5687 }
5688 break;
5689
5690 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
5691 case R_PPC_EMB_SDA21:
5692 case R_PPC_EMB_RELSDA:
5693 {
5694 const char *name;
5695 const struct elf_link_hash_entry *sh;
5696 int reg;
5697
5698 BFD_ASSERT (sec != NULL);
5699 name = bfd_get_section_name (abfd, sec->output_section);
5700 if (((strncmp (name, ".sdata", 6) == 0
5701 && (name[6] == 0 || name[6] == '.'))
5702 || (strncmp (name, ".sbss", 5) == 0
5703 && (name[5] == 0 || name[5] == '.'))))
5704 {
5705 reg = 13;
5706 sh = htab->sdata->sym_hash;
5707 addend -= (sh->root.u.def.value
5708 + sh->root.u.def.section->output_section->vma
5709 + sh->root.u.def.section->output_offset);
5710 }
5711
5712 else if (strncmp (name, ".sdata2", 7) == 0
5713 || strncmp (name, ".sbss2", 6) == 0)
5714 {
5715 reg = 2;
5716 sh = htab->sdata2->sym_hash;
5717 addend -= (sh->root.u.def.value
5718 + sh->root.u.def.section->output_section->vma
5719 + sh->root.u.def.section->output_offset);
5720 }
5721
5722 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
5723 || strcmp (name, ".PPC.EMB.sbss0") == 0)
5724 {
5725 reg = 0;
5726 }
5727
5728 else
5729 {
5730 (*_bfd_error_handler)
5731 (_("%s: the target (%s) of a %s relocation is "
5732 "in the wrong output section (%s)"),
5733 bfd_archive_filename (input_bfd),
5734 sym_name,
5735 howto->name,
5736 name);
5737
5738 bfd_set_error (bfd_error_bad_value);
5739 ret = FALSE;
5740 continue;
5741 }
5742
5743 if (r_type == R_PPC_EMB_SDA21)
5744 { /* fill in register field */
5745 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5746 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
5747 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5748 }
5749 }
5750 break;
5751
5752 /* Relocate against the beginning of the section. */
5753 case R_PPC_SECTOFF:
5754 case R_PPC_SECTOFF_LO:
5755 case R_PPC_SECTOFF_HI:
5756 case R_PPC_SECTOFF_HA:
5757 BFD_ASSERT (sec != NULL);
5758 addend -= sec->output_section->vma;
5759 break;
5760
5761 /* Negative relocations. */
5762 case R_PPC_EMB_NADDR32:
5763 case R_PPC_EMB_NADDR16:
5764 case R_PPC_EMB_NADDR16_LO:
5765 case R_PPC_EMB_NADDR16_HI:
5766 case R_PPC_EMB_NADDR16_HA:
5767 addend -= 2 * relocation;
5768 break;
5769
5770 case R_PPC_COPY:
5771 case R_PPC_GLOB_DAT:
5772 case R_PPC_JMP_SLOT:
5773 case R_PPC_RELATIVE:
5774 case R_PPC_PLT32:
5775 case R_PPC_PLTREL32:
5776 case R_PPC_PLT16_LO:
5777 case R_PPC_PLT16_HI:
5778 case R_PPC_PLT16_HA:
5779 case R_PPC_ADDR30:
5780 case R_PPC_EMB_RELSEC16:
5781 case R_PPC_EMB_RELST_LO:
5782 case R_PPC_EMB_RELST_HI:
5783 case R_PPC_EMB_RELST_HA:
5784 case R_PPC_EMB_BIT_FLD:
5785 (*_bfd_error_handler)
5786 (_("%s: relocation %s is not yet supported for symbol %s."),
5787 bfd_archive_filename (input_bfd),
5788 howto->name,
5789 sym_name);
5790
5791 bfd_set_error (bfd_error_invalid_operation);
5792 ret = FALSE;
5793 continue;
5794 }
5795
5796 /* Do any further special processing. */
5797 switch (r_type)
5798 {
5799 default:
5800 break;
5801
5802 case R_PPC_ADDR16_HA:
5803 case R_PPC_GOT16_HA:
5804 case R_PPC_PLT16_HA:
5805 case R_PPC_SECTOFF_HA:
5806 case R_PPC_TPREL16_HA:
5807 case R_PPC_DTPREL16_HA:
5808 case R_PPC_GOT_TLSGD16_HA:
5809 case R_PPC_GOT_TLSLD16_HA:
5810 case R_PPC_GOT_TPREL16_HA:
5811 case R_PPC_GOT_DTPREL16_HA:
5812 case R_PPC_EMB_NADDR16_HA:
5813 case R_PPC_EMB_RELST_HA:
5814 /* It's just possible that this symbol is a weak symbol
5815 that's not actually defined anywhere. In that case,
5816 'sec' would be NULL, and we should leave the symbol
5817 alone (it will be set to zero elsewhere in the link). */
5818 if (sec != NULL)
5819 /* Add 0x10000 if sign bit in 0:15 is set.
5820 Bits 0:15 are not used. */
5821 addend += 0x8000;
5822 break;
5823 }
5824
5825 #ifdef DEBUG
5826 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
5827 "offset = %ld, addend = %ld\n",
5828 howto->name,
5829 (int) r_type,
5830 sym_name,
5831 r_symndx,
5832 (long) rel->r_offset,
5833 (long) addend);
5834 #endif
5835
5836 if (unresolved_reloc
5837 && !((input_section->flags & SEC_DEBUGGING) != 0
5838 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
5839 {
5840 (*_bfd_error_handler)
5841 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
5842 bfd_archive_filename (input_bfd),
5843 bfd_get_section_name (input_bfd, input_section),
5844 (long) rel->r_offset,
5845 howto->name,
5846 sym_name);
5847 ret = FALSE;
5848 }
5849
5850 r = _bfd_final_link_relocate (howto,
5851 input_bfd,
5852 input_section,
5853 contents,
5854 rel->r_offset,
5855 relocation,
5856 addend);
5857
5858 if (r != bfd_reloc_ok)
5859 {
5860 if (sym_name == NULL)
5861 sym_name = "(null)";
5862 if (r == bfd_reloc_overflow)
5863 {
5864 if (warned)
5865 continue;
5866 if (h != NULL
5867 && h->root.type == bfd_link_hash_undefweak
5868 && howto->pc_relative)
5869 {
5870 /* Assume this is a call protected by other code that
5871 detect the symbol is undefined. If this is the case,
5872 we can safely ignore the overflow. If not, the
5873 program is hosed anyway, and a little warning isn't
5874 going to help. */
5875
5876 continue;
5877 }
5878
5879 if (! (*info->callbacks->reloc_overflow) (info,
5880 sym_name,
5881 howto->name,
5882 rel->r_addend,
5883 input_bfd,
5884 input_section,
5885 rel->r_offset))
5886 return FALSE;
5887 }
5888 else
5889 {
5890 (*_bfd_error_handler)
5891 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
5892 bfd_archive_filename (input_bfd),
5893 bfd_get_section_name (input_bfd, input_section),
5894 (long) rel->r_offset, howto->name, sym_name, (int) r);
5895 ret = FALSE;
5896 }
5897 }
5898 }
5899
5900 #ifdef DEBUG
5901 fprintf (stderr, "\n");
5902 #endif
5903
5904 return ret;
5905 }
5906
5907 static enum elf_reloc_type_class
5908 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
5909 {
5910 switch (ELF32_R_TYPE (rela->r_info))
5911 {
5912 case R_PPC_RELATIVE:
5913 return reloc_class_relative;
5914 case R_PPC_REL24:
5915 case R_PPC_ADDR24:
5916 case R_PPC_JMP_SLOT:
5917 return reloc_class_plt;
5918 case R_PPC_COPY:
5919 return reloc_class_copy;
5920 default:
5921 return reloc_class_normal;
5922 }
5923 }
5924 \f
5925 /* Support for core dump NOTE sections. */
5926
5927 static bfd_boolean
5928 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
5929 {
5930 int offset;
5931 unsigned int raw_size;
5932
5933 switch (note->descsz)
5934 {
5935 default:
5936 return FALSE;
5937
5938 case 268: /* Linux/PPC. */
5939 /* pr_cursig */
5940 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
5941
5942 /* pr_pid */
5943 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
5944
5945 /* pr_reg */
5946 offset = 72;
5947 raw_size = 192;
5948
5949 break;
5950 }
5951
5952 /* Make a ".reg/999" section. */
5953 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
5954 raw_size, note->descpos + offset);
5955 }
5956
5957 static bfd_boolean
5958 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
5959 {
5960 switch (note->descsz)
5961 {
5962 default:
5963 return FALSE;
5964
5965 case 128: /* Linux/PPC elf_prpsinfo. */
5966 elf_tdata (abfd)->core_program
5967 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
5968 elf_tdata (abfd)->core_command
5969 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
5970 }
5971
5972 /* Note that for some reason, a spurious space is tacked
5973 onto the end of the args in some (at least one anyway)
5974 implementations, so strip it off if it exists. */
5975
5976 {
5977 char *command = elf_tdata (abfd)->core_command;
5978 int n = strlen (command);
5979
5980 if (0 < n && command[n - 1] == ' ')
5981 command[n - 1] = '\0';
5982 }
5983
5984 return TRUE;
5985 }
5986 \f
5987 /* Very simple linked list structure for recording apuinfo values. */
5988 typedef struct apuinfo_list
5989 {
5990 struct apuinfo_list *next;
5991 unsigned long value;
5992 }
5993 apuinfo_list;
5994
5995 static apuinfo_list *head;
5996
5997
5998 static void
5999 apuinfo_list_init (void)
6000 {
6001 head = NULL;
6002 }
6003
6004 static void
6005 apuinfo_list_add (unsigned long value)
6006 {
6007 apuinfo_list *entry = head;
6008
6009 while (entry != NULL)
6010 {
6011 if (entry->value == value)
6012 return;
6013 entry = entry->next;
6014 }
6015
6016 entry = bfd_malloc (sizeof (* entry));
6017 if (entry == NULL)
6018 return;
6019
6020 entry->value = value;
6021 entry->next = head;
6022 head = entry;
6023 }
6024
6025 static unsigned
6026 apuinfo_list_length (void)
6027 {
6028 apuinfo_list *entry;
6029 unsigned long count;
6030
6031 for (entry = head, count = 0;
6032 entry;
6033 entry = entry->next)
6034 ++ count;
6035
6036 return count;
6037 }
6038
6039 static inline unsigned long
6040 apuinfo_list_element (unsigned long number)
6041 {
6042 apuinfo_list * entry;
6043
6044 for (entry = head;
6045 entry && number --;
6046 entry = entry->next)
6047 ;
6048
6049 return entry ? entry->value : 0;
6050 }
6051
6052 static void
6053 apuinfo_list_finish (void)
6054 {
6055 apuinfo_list *entry;
6056
6057 for (entry = head; entry;)
6058 {
6059 apuinfo_list *next = entry->next;
6060 free (entry);
6061 entry = next;
6062 }
6063
6064 head = NULL;
6065 }
6066
6067 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
6068 #define APUINFO_LABEL "APUinfo"
6069
6070 /* Scan the input BFDs and create a linked list of
6071 the APUinfo values that will need to be emitted. */
6072
6073 static void
6074 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
6075 {
6076 bfd *ibfd;
6077 asection *asec;
6078 char *buffer;
6079 unsigned num_input_sections;
6080 bfd_size_type output_section_size;
6081 unsigned i;
6082 unsigned num_entries;
6083 unsigned long offset;
6084 unsigned long length;
6085 const char *error_message = NULL;
6086
6087 if (link_info == NULL)
6088 return;
6089
6090 /* Scan the input bfds, looking for apuinfo sections. */
6091 num_input_sections = 0;
6092 output_section_size = 0;
6093
6094 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
6095 {
6096 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
6097 if (asec)
6098 {
6099 ++ num_input_sections;
6100 output_section_size += asec->_raw_size;
6101 }
6102 }
6103
6104 /* We need at least one input sections
6105 in order to make merging worthwhile. */
6106 if (num_input_sections < 1)
6107 return;
6108
6109 /* Just make sure that the output section exists as well. */
6110 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6111 if (asec == NULL)
6112 return;
6113
6114 /* Allocate a buffer for the contents of the input sections. */
6115 buffer = bfd_malloc (output_section_size);
6116 if (buffer == NULL)
6117 return;
6118
6119 offset = 0;
6120 apuinfo_list_init ();
6121
6122 /* Read in the input sections contents. */
6123 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
6124 {
6125 unsigned long datum;
6126 char *ptr;
6127
6128 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
6129 if (asec == NULL)
6130 continue;
6131
6132 length = asec->_raw_size;
6133 if (length < 24)
6134 {
6135 error_message = _("corrupt or empty %s section in %s");
6136 goto fail;
6137 }
6138
6139 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
6140 || (bfd_bread (buffer + offset, length, ibfd) != length))
6141 {
6142 error_message = _("unable to read in %s section from %s");
6143 goto fail;
6144 }
6145
6146 /* Process the contents of the section. */
6147 ptr = buffer + offset;
6148 error_message = _("corrupt %s section in %s");
6149
6150 /* Verify the contents of the header. Note - we have to
6151 extract the values this way in order to allow for a
6152 host whose endian-ness is different from the target. */
6153 datum = bfd_get_32 (ibfd, ptr);
6154 if (datum != sizeof APUINFO_LABEL)
6155 goto fail;
6156
6157 datum = bfd_get_32 (ibfd, ptr + 8);
6158 if (datum != 0x2)
6159 goto fail;
6160
6161 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
6162 goto fail;
6163
6164 /* Get the number of bytes used for apuinfo entries. */
6165 datum = bfd_get_32 (ibfd, ptr + 4);
6166 if (datum + 20 != length)
6167 goto fail;
6168
6169 /* Make sure that we do not run off the end of the section. */
6170 if (offset + length > output_section_size)
6171 goto fail;
6172
6173 /* Scan the apuinfo section, building a list of apuinfo numbers. */
6174 for (i = 0; i < datum; i += 4)
6175 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
6176
6177 /* Update the offset. */
6178 offset += length;
6179 }
6180
6181 error_message = NULL;
6182
6183 /* Compute the size of the output section. */
6184 num_entries = apuinfo_list_length ();
6185 output_section_size = 20 + num_entries * 4;
6186
6187 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6188
6189 if (! bfd_set_section_size (abfd, asec, output_section_size))
6190 ibfd = abfd,
6191 error_message = _("warning: unable to set size of %s section in %s");
6192
6193 fail:
6194 free (buffer);
6195
6196 if (error_message)
6197 (*_bfd_error_handler) (error_message, APUINFO_SECTION_NAME,
6198 bfd_archive_filename (ibfd));
6199 }
6200
6201
6202 /* Prevent the output section from accumulating the input sections'
6203 contents. We have already stored this in our linked list structure. */
6204
6205 static bfd_boolean
6206 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
6207 asection *asec,
6208 bfd_byte *contents ATTRIBUTE_UNUSED)
6209 {
6210 return (apuinfo_list_length ()
6211 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
6212 }
6213
6214
6215 /* Finally we can generate the output section. */
6216
6217 static void
6218 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
6219 {
6220 bfd_byte *buffer;
6221 asection *asec;
6222 unsigned i;
6223 unsigned num_entries;
6224 bfd_size_type length;
6225
6226 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6227 if (asec == NULL)
6228 return;
6229
6230 if (apuinfo_list_length () == 0)
6231 return;
6232
6233 length = asec->_raw_size;
6234 if (length < 20)
6235 return;
6236
6237 buffer = bfd_malloc (length);
6238 if (buffer == NULL)
6239 {
6240 (*_bfd_error_handler)
6241 (_("failed to allocate space for new APUinfo section."));
6242 return;
6243 }
6244
6245 /* Create the apuinfo header. */
6246 num_entries = apuinfo_list_length ();
6247 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
6248 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
6249 bfd_put_32 (abfd, 0x2, buffer + 8);
6250 strcpy (buffer + 12, APUINFO_LABEL);
6251
6252 length = 20;
6253 for (i = 0; i < num_entries; i++)
6254 {
6255 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
6256 length += 4;
6257 }
6258
6259 if (length != asec->_raw_size)
6260 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
6261
6262 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
6263 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
6264
6265 free (buffer);
6266
6267 apuinfo_list_finish ();
6268 }
6269
6270 /* Add extra PPC sections -- Note, for now, make .sbss2 and
6271 .PPC.EMB.sbss0 a normal section, and not a bss section so
6272 that the linker doesn't crater when trying to make more than
6273 2 sections. */
6274
6275 static struct bfd_elf_special_section const ppc_elf_special_sections[]=
6276 {
6277 { ".tags", 0, NULL, 0,
6278 SHT_ORDERED, SHF_ALLOC },
6279 { ".sdata", 0, NULL, 0,
6280 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
6281 { ".sbss", 0, NULL, 0,
6282 SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
6283 { ".sdata2", 0, NULL, 0,
6284 SHT_PROGBITS, SHF_ALLOC },
6285 { ".sbss2", 0, NULL, 0,
6286 SHT_PROGBITS, SHF_ALLOC },
6287 { ".PPC.EMB.apuinfo", 0, NULL, 0,
6288 SHT_NOTE, 0 },
6289 { ".PPC.EMB.sdata0", 0, NULL, 0,
6290 SHT_PROGBITS, SHF_ALLOC },
6291 { ".PPC.EMB.sbss0", 0, NULL, 0,
6292 SHT_PROGBITS, SHF_ALLOC },
6293 { ".plt", 0, NULL, 0,
6294 SHT_NOBITS, 0 },
6295 { NULL, 0, NULL, 0,
6296 0, 0 }
6297 };
6298 \f
6299 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
6300 #define TARGET_LITTLE_NAME "elf32-powerpcle"
6301 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
6302 #define TARGET_BIG_NAME "elf32-powerpc"
6303 #define ELF_ARCH bfd_arch_powerpc
6304 #define ELF_MACHINE_CODE EM_PPC
6305 #ifdef __QNXTARGET__
6306 #define ELF_MAXPAGESIZE 0x1000
6307 #else
6308 #define ELF_MAXPAGESIZE 0x10000
6309 #endif
6310 #define elf_info_to_howto ppc_elf_info_to_howto
6311
6312 #ifdef EM_CYGNUS_POWERPC
6313 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6314 #endif
6315
6316 #ifdef EM_PPC_OLD
6317 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6318 #endif
6319
6320 #define elf_backend_plt_not_loaded 1
6321 #define elf_backend_got_symbol_offset 4
6322 #define elf_backend_can_gc_sections 1
6323 #define elf_backend_can_refcount 1
6324 #define elf_backend_got_header_size 12
6325 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
6326 #define elf_backend_rela_normal 1
6327
6328 #define bfd_elf32_mkobject ppc_elf_mkobject
6329 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
6330 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
6331 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
6332 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
6333 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
6334
6335 #define elf_backend_object_p ppc_elf_object_p
6336 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
6337 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
6338 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
6339 #define elf_backend_relocate_section ppc_elf_relocate_section
6340 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
6341 #define elf_backend_check_relocs ppc_elf_check_relocs
6342 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
6343 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
6344 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
6345 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
6346 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
6347 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
6348 #define elf_backend_fake_sections ppc_elf_fake_sections
6349 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
6350 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
6351 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
6352 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
6353 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
6354 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
6355 #define elf_backend_final_write_processing ppc_elf_final_write_processing
6356 #define elf_backend_write_section ppc_elf_write_section
6357 #define elf_backend_special_sections ppc_elf_special_sections
6358
6359 #include "elf32-target.h"
GDB Binutils - Deliverables
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