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* elf32-ppc.c (ppc_elf_install_value): Delete.
[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 /* Shortcut to .__tls_get_addr. */
209 struct elf_link_hash_entry *tls_get_addr;
210
211 /* TLS local dynamic got entry handling. */
212 union {
213 bfd_signed_vma refcount;
214 bfd_vma offset;
215 } tlsld_got;
216
217 /* Small local sym to section mapping cache. */
218 struct sym_sec_cache sym_sec;
219 };
220
221 /* Get the PPC ELF linker hash table from a link_info structure. */
222
223 #define ppc_elf_hash_table(p) \
224 ((struct ppc_elf_link_hash_table *) (p)->hash)
225
226 /* Create an entry in a PPC ELF linker hash table. */
227
228 static struct bfd_hash_entry *
229 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
230 struct bfd_hash_table *table,
231 const char *string)
232 {
233 /* Allocate the structure if it has not already been allocated by a
234 subclass. */
235 if (entry == NULL)
236 {
237 entry = bfd_hash_allocate (table,
238 sizeof (struct ppc_elf_link_hash_entry));
239 if (entry == NULL)
240 return entry;
241 }
242
243 /* Call the allocation method of the superclass. */
244 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
245 if (entry != NULL)
246 {
247 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
248 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
249 ppc_elf_hash_entry (entry)->tls_mask = 0;
250 }
251
252 return entry;
253 }
254
255 /* Create a PPC ELF linker hash table. */
256
257 static struct bfd_link_hash_table *
258 ppc_elf_link_hash_table_create (bfd *abfd)
259 {
260 struct ppc_elf_link_hash_table *ret;
261
262 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
263 if (ret == NULL)
264 return NULL;
265
266 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
267 ppc_elf_link_hash_newfunc))
268 {
269 free (ret);
270 return NULL;
271 }
272
273 return &ret->elf.root;
274 }
275
276 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
277 copying dynamic variables from a shared lib into an app's dynbss
278 section, and instead use a dynamic relocation to point into the
279 shared lib. */
280 #define ELIMINATE_COPY_RELOCS 1
281
282 /* Copy the extra info we tack onto an elf_link_hash_entry. */
283
284 static void
285 ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed,
286 struct elf_link_hash_entry *dir,
287 struct elf_link_hash_entry *ind)
288 {
289 struct ppc_elf_link_hash_entry *edir, *eind;
290
291 edir = (struct ppc_elf_link_hash_entry *) dir;
292 eind = (struct ppc_elf_link_hash_entry *) ind;
293
294 if (eind->dyn_relocs != NULL)
295 {
296 if (edir->dyn_relocs != NULL)
297 {
298 struct ppc_elf_dyn_relocs **pp;
299 struct ppc_elf_dyn_relocs *p;
300
301 if (ind->root.type == bfd_link_hash_indirect)
302 abort ();
303
304 /* Add reloc counts against the weak sym to the strong sym
305 list. Merge any entries against the same section. */
306 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
307 {
308 struct ppc_elf_dyn_relocs *q;
309
310 for (q = edir->dyn_relocs; q != NULL; q = q->next)
311 if (q->sec == p->sec)
312 {
313 q->pc_count += p->pc_count;
314 q->count += p->count;
315 *pp = p->next;
316 break;
317 }
318 if (q == NULL)
319 pp = &p->next;
320 }
321 *pp = edir->dyn_relocs;
322 }
323
324 edir->dyn_relocs = eind->dyn_relocs;
325 eind->dyn_relocs = NULL;
326 }
327
328 edir->tls_mask |= eind->tls_mask;
329
330 if (ELIMINATE_COPY_RELOCS
331 && ind->root.type != bfd_link_hash_indirect
332 && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
333 /* If called to transfer flags for a weakdef during processing
334 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
335 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
336 dir->elf_link_hash_flags |=
337 (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
338 | ELF_LINK_HASH_REF_REGULAR
339 | ELF_LINK_HASH_REF_REGULAR_NONWEAK));
340 else
341 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
342 }
343 \f
344 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
345
346 static reloc_howto_type ppc_elf_howto_raw[] = {
347 /* This reloc does nothing. */
348 HOWTO (R_PPC_NONE, /* type */
349 0, /* rightshift */
350 2, /* size (0 = byte, 1 = short, 2 = long) */
351 32, /* bitsize */
352 FALSE, /* pc_relative */
353 0, /* bitpos */
354 complain_overflow_bitfield, /* complain_on_overflow */
355 bfd_elf_generic_reloc, /* special_function */
356 "R_PPC_NONE", /* name */
357 FALSE, /* partial_inplace */
358 0, /* src_mask */
359 0, /* dst_mask */
360 FALSE), /* pcrel_offset */
361
362 /* A standard 32 bit relocation. */
363 HOWTO (R_PPC_ADDR32, /* type */
364 0, /* rightshift */
365 2, /* size (0 = byte, 1 = short, 2 = long) */
366 32, /* bitsize */
367 FALSE, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_bitfield, /* complain_on_overflow */
370 bfd_elf_generic_reloc, /* special_function */
371 "R_PPC_ADDR32", /* name */
372 FALSE, /* partial_inplace */
373 0, /* src_mask */
374 0xffffffff, /* dst_mask */
375 FALSE), /* pcrel_offset */
376
377 /* An absolute 26 bit branch; the lower two bits must be zero.
378 FIXME: we don't check that, we just clear them. */
379 HOWTO (R_PPC_ADDR24, /* type */
380 0, /* rightshift */
381 2, /* size (0 = byte, 1 = short, 2 = long) */
382 26, /* bitsize */
383 FALSE, /* pc_relative */
384 0, /* bitpos */
385 complain_overflow_bitfield, /* complain_on_overflow */
386 bfd_elf_generic_reloc, /* special_function */
387 "R_PPC_ADDR24", /* name */
388 FALSE, /* partial_inplace */
389 0, /* src_mask */
390 0x3fffffc, /* dst_mask */
391 FALSE), /* pcrel_offset */
392
393 /* A standard 16 bit relocation. */
394 HOWTO (R_PPC_ADDR16, /* type */
395 0, /* rightshift */
396 1, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 FALSE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_bitfield, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_ADDR16", /* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xffff, /* dst_mask */
406 FALSE), /* pcrel_offset */
407
408 /* A 16 bit relocation without overflow. */
409 HOWTO (R_PPC_ADDR16_LO, /* type */
410 0, /* rightshift */
411 1, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_dont,/* complain_on_overflow */
416 bfd_elf_generic_reloc, /* special_function */
417 "R_PPC_ADDR16_LO", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0xffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 /* The high order 16 bits of an address. */
424 HOWTO (R_PPC_ADDR16_HI, /* type */
425 16, /* rightshift */
426 1, /* size (0 = byte, 1 = short, 2 = long) */
427 16, /* bitsize */
428 FALSE, /* pc_relative */
429 0, /* bitpos */
430 complain_overflow_dont, /* complain_on_overflow */
431 bfd_elf_generic_reloc, /* special_function */
432 "R_PPC_ADDR16_HI", /* name */
433 FALSE, /* partial_inplace */
434 0, /* src_mask */
435 0xffff, /* dst_mask */
436 FALSE), /* pcrel_offset */
437
438 /* The high order 16 bits of an address, plus 1 if the contents of
439 the low 16 bits, treated as a signed number, is negative. */
440 HOWTO (R_PPC_ADDR16_HA, /* type */
441 16, /* rightshift */
442 1, /* size (0 = byte, 1 = short, 2 = long) */
443 16, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_dont, /* complain_on_overflow */
447 ppc_elf_addr16_ha_reloc, /* special_function */
448 "R_PPC_ADDR16_HA", /* name */
449 FALSE, /* partial_inplace */
450 0, /* src_mask */
451 0xffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 /* An absolute 16 bit branch; the lower two bits must be zero.
455 FIXME: we don't check that, we just clear them. */
456 HOWTO (R_PPC_ADDR14, /* type */
457 0, /* rightshift */
458 2, /* size (0 = byte, 1 = short, 2 = long) */
459 16, /* bitsize */
460 FALSE, /* pc_relative */
461 0, /* bitpos */
462 complain_overflow_bitfield, /* complain_on_overflow */
463 bfd_elf_generic_reloc, /* special_function */
464 "R_PPC_ADDR14", /* name */
465 FALSE, /* partial_inplace */
466 0, /* src_mask */
467 0xfffc, /* dst_mask */
468 FALSE), /* pcrel_offset */
469
470 /* An absolute 16 bit branch, for which bit 10 should be set to
471 indicate that the branch is expected to be taken. The lower two
472 bits must be zero. */
473 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
474 0, /* rightshift */
475 2, /* size (0 = byte, 1 = short, 2 = long) */
476 16, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_bitfield, /* complain_on_overflow */
480 bfd_elf_generic_reloc, /* special_function */
481 "R_PPC_ADDR14_BRTAKEN",/* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0xfffc, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 /* An absolute 16 bit branch, for which bit 10 should be set to
488 indicate that the branch is not expected to be taken. The lower
489 two bits must be zero. */
490 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
491 0, /* rightshift */
492 2, /* size (0 = byte, 1 = short, 2 = long) */
493 16, /* bitsize */
494 FALSE, /* pc_relative */
495 0, /* bitpos */
496 complain_overflow_bitfield, /* complain_on_overflow */
497 bfd_elf_generic_reloc, /* special_function */
498 "R_PPC_ADDR14_BRNTAKEN",/* name */
499 FALSE, /* partial_inplace */
500 0, /* src_mask */
501 0xfffc, /* dst_mask */
502 FALSE), /* pcrel_offset */
503
504 /* A relative 26 bit branch; the lower two bits must be zero. */
505 HOWTO (R_PPC_REL24, /* type */
506 0, /* rightshift */
507 2, /* size (0 = byte, 1 = short, 2 = long) */
508 26, /* bitsize */
509 TRUE, /* pc_relative */
510 0, /* bitpos */
511 complain_overflow_signed, /* complain_on_overflow */
512 bfd_elf_generic_reloc, /* special_function */
513 "R_PPC_REL24", /* name */
514 FALSE, /* partial_inplace */
515 0, /* src_mask */
516 0x3fffffc, /* dst_mask */
517 TRUE), /* pcrel_offset */
518
519 /* A relative 16 bit branch; the lower two bits must be zero. */
520 HOWTO (R_PPC_REL14, /* type */
521 0, /* rightshift */
522 2, /* size (0 = byte, 1 = short, 2 = long) */
523 16, /* bitsize */
524 TRUE, /* pc_relative */
525 0, /* bitpos */
526 complain_overflow_signed, /* complain_on_overflow */
527 bfd_elf_generic_reloc, /* special_function */
528 "R_PPC_REL14", /* name */
529 FALSE, /* partial_inplace */
530 0, /* src_mask */
531 0xfffc, /* dst_mask */
532 TRUE), /* pcrel_offset */
533
534 /* A relative 16 bit branch. Bit 10 should be set to indicate that
535 the branch is expected to be taken. The lower two bits must be
536 zero. */
537 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
538 0, /* rightshift */
539 2, /* size (0 = byte, 1 = short, 2 = long) */
540 16, /* bitsize */
541 TRUE, /* pc_relative */
542 0, /* bitpos */
543 complain_overflow_signed, /* complain_on_overflow */
544 bfd_elf_generic_reloc, /* special_function */
545 "R_PPC_REL14_BRTAKEN", /* name */
546 FALSE, /* partial_inplace */
547 0, /* src_mask */
548 0xfffc, /* dst_mask */
549 TRUE), /* pcrel_offset */
550
551 /* A relative 16 bit branch. Bit 10 should be set to indicate that
552 the branch is not expected to be taken. The lower two bits must
553 be zero. */
554 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
555 0, /* rightshift */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
557 16, /* bitsize */
558 TRUE, /* pc_relative */
559 0, /* bitpos */
560 complain_overflow_signed, /* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_PPC_REL14_BRNTAKEN",/* name */
563 FALSE, /* partial_inplace */
564 0, /* src_mask */
565 0xfffc, /* dst_mask */
566 TRUE), /* pcrel_offset */
567
568 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
569 symbol. */
570 HOWTO (R_PPC_GOT16, /* type */
571 0, /* rightshift */
572 1, /* size (0 = byte, 1 = short, 2 = long) */
573 16, /* bitsize */
574 FALSE, /* pc_relative */
575 0, /* bitpos */
576 complain_overflow_signed, /* complain_on_overflow */
577 bfd_elf_generic_reloc, /* special_function */
578 "R_PPC_GOT16", /* name */
579 FALSE, /* partial_inplace */
580 0, /* src_mask */
581 0xffff, /* dst_mask */
582 FALSE), /* pcrel_offset */
583
584 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
585 the symbol. */
586 HOWTO (R_PPC_GOT16_LO, /* type */
587 0, /* rightshift */
588 1, /* size (0 = byte, 1 = short, 2 = long) */
589 16, /* bitsize */
590 FALSE, /* pc_relative */
591 0, /* bitpos */
592 complain_overflow_dont, /* complain_on_overflow */
593 bfd_elf_generic_reloc, /* special_function */
594 "R_PPC_GOT16_LO", /* name */
595 FALSE, /* partial_inplace */
596 0, /* src_mask */
597 0xffff, /* dst_mask */
598 FALSE), /* pcrel_offset */
599
600 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
601 the symbol. */
602 HOWTO (R_PPC_GOT16_HI, /* type */
603 16, /* rightshift */
604 1, /* size (0 = byte, 1 = short, 2 = long) */
605 16, /* bitsize */
606 FALSE, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_bitfield, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC_GOT16_HI", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0xffff, /* dst_mask */
614 FALSE), /* pcrel_offset */
615
616 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
617 the symbol. */
618 HOWTO (R_PPC_GOT16_HA, /* type */
619 16, /* rightshift */
620 1, /* size (0 = byte, 1 = short, 2 = long) */
621 16, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 ppc_elf_addr16_ha_reloc, /* special_function */
626 "R_PPC_GOT16_HA", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0xffff, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* Like R_PPC_REL24, but referring to the procedure linkage table
633 entry for the symbol. */
634 HOWTO (R_PPC_PLTREL24, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 26, /* bitsize */
638 TRUE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_signed, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC_PLTREL24", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0x3fffffc, /* dst_mask */
646 TRUE), /* pcrel_offset */
647
648 /* This is used only by the dynamic linker. The symbol should exist
649 both in the object being run and in some shared library. The
650 dynamic linker copies the data addressed by the symbol from the
651 shared library into the object, because the object being
652 run has to have the data at some particular address. */
653 HOWTO (R_PPC_COPY, /* type */
654 0, /* rightshift */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
656 32, /* bitsize */
657 FALSE, /* pc_relative */
658 0, /* bitpos */
659 complain_overflow_bitfield, /* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 "R_PPC_COPY", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 /* Like R_PPC_ADDR32, but used when setting global offset table
668 entries. */
669 HOWTO (R_PPC_GLOB_DAT, /* type */
670 0, /* rightshift */
671 2, /* size (0 = byte, 1 = short, 2 = long) */
672 32, /* bitsize */
673 FALSE, /* pc_relative */
674 0, /* bitpos */
675 complain_overflow_bitfield, /* complain_on_overflow */
676 bfd_elf_generic_reloc, /* special_function */
677 "R_PPC_GLOB_DAT", /* name */
678 FALSE, /* partial_inplace */
679 0, /* src_mask */
680 0xffffffff, /* dst_mask */
681 FALSE), /* pcrel_offset */
682
683 /* Marks a procedure linkage table entry for a symbol. */
684 HOWTO (R_PPC_JMP_SLOT, /* type */
685 0, /* rightshift */
686 2, /* size (0 = byte, 1 = short, 2 = long) */
687 32, /* bitsize */
688 FALSE, /* pc_relative */
689 0, /* bitpos */
690 complain_overflow_bitfield, /* complain_on_overflow */
691 bfd_elf_generic_reloc, /* special_function */
692 "R_PPC_JMP_SLOT", /* name */
693 FALSE, /* partial_inplace */
694 0, /* src_mask */
695 0, /* dst_mask */
696 FALSE), /* pcrel_offset */
697
698 /* Used only by the dynamic linker. When the object is run, this
699 longword is set to the load address of the object, plus the
700 addend. */
701 HOWTO (R_PPC_RELATIVE, /* type */
702 0, /* rightshift */
703 2, /* size (0 = byte, 1 = short, 2 = long) */
704 32, /* bitsize */
705 FALSE, /* pc_relative */
706 0, /* bitpos */
707 complain_overflow_bitfield, /* complain_on_overflow */
708 bfd_elf_generic_reloc, /* special_function */
709 "R_PPC_RELATIVE", /* name */
710 FALSE, /* partial_inplace */
711 0, /* src_mask */
712 0xffffffff, /* dst_mask */
713 FALSE), /* pcrel_offset */
714
715 /* Like R_PPC_REL24, but uses the value of the symbol within the
716 object rather than the final value. Normally used for
717 _GLOBAL_OFFSET_TABLE_. */
718 HOWTO (R_PPC_LOCAL24PC, /* type */
719 0, /* rightshift */
720 2, /* size (0 = byte, 1 = short, 2 = long) */
721 26, /* bitsize */
722 TRUE, /* pc_relative */
723 0, /* bitpos */
724 complain_overflow_signed, /* complain_on_overflow */
725 bfd_elf_generic_reloc, /* special_function */
726 "R_PPC_LOCAL24PC", /* name */
727 FALSE, /* partial_inplace */
728 0, /* src_mask */
729 0x3fffffc, /* dst_mask */
730 TRUE), /* pcrel_offset */
731
732 /* Like R_PPC_ADDR32, but may be unaligned. */
733 HOWTO (R_PPC_UADDR32, /* type */
734 0, /* rightshift */
735 2, /* size (0 = byte, 1 = short, 2 = long) */
736 32, /* bitsize */
737 FALSE, /* pc_relative */
738 0, /* bitpos */
739 complain_overflow_bitfield, /* complain_on_overflow */
740 bfd_elf_generic_reloc, /* special_function */
741 "R_PPC_UADDR32", /* name */
742 FALSE, /* partial_inplace */
743 0, /* src_mask */
744 0xffffffff, /* dst_mask */
745 FALSE), /* pcrel_offset */
746
747 /* Like R_PPC_ADDR16, but may be unaligned. */
748 HOWTO (R_PPC_UADDR16, /* type */
749 0, /* rightshift */
750 1, /* size (0 = byte, 1 = short, 2 = long) */
751 16, /* bitsize */
752 FALSE, /* pc_relative */
753 0, /* bitpos */
754 complain_overflow_bitfield, /* complain_on_overflow */
755 bfd_elf_generic_reloc, /* special_function */
756 "R_PPC_UADDR16", /* name */
757 FALSE, /* partial_inplace */
758 0, /* src_mask */
759 0xffff, /* dst_mask */
760 FALSE), /* pcrel_offset */
761
762 /* 32-bit PC relative */
763 HOWTO (R_PPC_REL32, /* type */
764 0, /* rightshift */
765 2, /* size (0 = byte, 1 = short, 2 = long) */
766 32, /* bitsize */
767 TRUE, /* pc_relative */
768 0, /* bitpos */
769 complain_overflow_bitfield, /* complain_on_overflow */
770 bfd_elf_generic_reloc, /* special_function */
771 "R_PPC_REL32", /* name */
772 FALSE, /* partial_inplace */
773 0, /* src_mask */
774 0xffffffff, /* dst_mask */
775 TRUE), /* pcrel_offset */
776
777 /* 32-bit relocation to the symbol's procedure linkage table.
778 FIXME: not supported. */
779 HOWTO (R_PPC_PLT32, /* type */
780 0, /* rightshift */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
782 32, /* bitsize */
783 FALSE, /* pc_relative */
784 0, /* bitpos */
785 complain_overflow_bitfield, /* complain_on_overflow */
786 bfd_elf_generic_reloc, /* special_function */
787 "R_PPC_PLT32", /* name */
788 FALSE, /* partial_inplace */
789 0, /* src_mask */
790 0, /* dst_mask */
791 FALSE), /* pcrel_offset */
792
793 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
794 FIXME: not supported. */
795 HOWTO (R_PPC_PLTREL32, /* type */
796 0, /* rightshift */
797 2, /* size (0 = byte, 1 = short, 2 = long) */
798 32, /* bitsize */
799 TRUE, /* pc_relative */
800 0, /* bitpos */
801 complain_overflow_bitfield, /* complain_on_overflow */
802 bfd_elf_generic_reloc, /* special_function */
803 "R_PPC_PLTREL32", /* name */
804 FALSE, /* partial_inplace */
805 0, /* src_mask */
806 0, /* dst_mask */
807 TRUE), /* pcrel_offset */
808
809 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
810 the symbol. */
811 HOWTO (R_PPC_PLT16_LO, /* type */
812 0, /* rightshift */
813 1, /* size (0 = byte, 1 = short, 2 = long) */
814 16, /* bitsize */
815 FALSE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_PPC_PLT16_LO", /* name */
820 FALSE, /* partial_inplace */
821 0, /* src_mask */
822 0xffff, /* dst_mask */
823 FALSE), /* pcrel_offset */
824
825 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
826 the symbol. */
827 HOWTO (R_PPC_PLT16_HI, /* type */
828 16, /* rightshift */
829 1, /* size (0 = byte, 1 = short, 2 = long) */
830 16, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_bitfield, /* complain_on_overflow */
834 bfd_elf_generic_reloc, /* special_function */
835 "R_PPC_PLT16_HI", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 0xffff, /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
842 the symbol. */
843 HOWTO (R_PPC_PLT16_HA, /* type */
844 16, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 FALSE, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_bitfield, /* complain_on_overflow */
850 ppc_elf_addr16_ha_reloc, /* special_function */
851 "R_PPC_PLT16_HA", /* name */
852 FALSE, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE), /* pcrel_offset */
856
857 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
858 small data items. */
859 HOWTO (R_PPC_SDAREL16, /* type */
860 0, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_signed, /* complain_on_overflow */
866 bfd_elf_generic_reloc, /* special_function */
867 "R_PPC_SDAREL16", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* 16-bit section relative relocation. */
874 HOWTO (R_PPC_SECTOFF, /* type */
875 0, /* rightshift */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
877 16, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_bitfield, /* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_PPC_SECTOFF", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* 16-bit lower half section relative relocation. */
889 HOWTO (R_PPC_SECTOFF_LO, /* type */
890 0, /* rightshift */
891 1, /* size (0 = byte, 1 = short, 2 = long) */
892 16, /* bitsize */
893 FALSE, /* pc_relative */
894 0, /* bitpos */
895 complain_overflow_dont, /* complain_on_overflow */
896 bfd_elf_generic_reloc, /* special_function */
897 "R_PPC_SECTOFF_LO", /* name */
898 FALSE, /* partial_inplace */
899 0, /* src_mask */
900 0xffff, /* dst_mask */
901 FALSE), /* pcrel_offset */
902
903 /* 16-bit upper half section relative relocation. */
904 HOWTO (R_PPC_SECTOFF_HI, /* type */
905 16, /* rightshift */
906 1, /* size (0 = byte, 1 = short, 2 = long) */
907 16, /* bitsize */
908 FALSE, /* pc_relative */
909 0, /* bitpos */
910 complain_overflow_bitfield, /* complain_on_overflow */
911 bfd_elf_generic_reloc, /* special_function */
912 "R_PPC_SECTOFF_HI", /* name */
913 FALSE, /* partial_inplace */
914 0, /* src_mask */
915 0xffff, /* dst_mask */
916 FALSE), /* pcrel_offset */
917
918 /* 16-bit upper half adjusted section relative relocation. */
919 HOWTO (R_PPC_SECTOFF_HA, /* type */
920 16, /* rightshift */
921 1, /* size (0 = byte, 1 = short, 2 = long) */
922 16, /* bitsize */
923 FALSE, /* pc_relative */
924 0, /* bitpos */
925 complain_overflow_bitfield, /* complain_on_overflow */
926 ppc_elf_addr16_ha_reloc, /* special_function */
927 "R_PPC_SECTOFF_HA", /* name */
928 FALSE, /* partial_inplace */
929 0, /* src_mask */
930 0xffff, /* dst_mask */
931 FALSE), /* pcrel_offset */
932
933 /* Marker reloc for TLS. */
934 HOWTO (R_PPC_TLS,
935 0, /* rightshift */
936 2, /* size (0 = byte, 1 = short, 2 = long) */
937 32, /* bitsize */
938 FALSE, /* pc_relative */
939 0, /* bitpos */
940 complain_overflow_dont, /* complain_on_overflow */
941 bfd_elf_generic_reloc, /* special_function */
942 "R_PPC_TLS", /* name */
943 FALSE, /* partial_inplace */
944 0, /* src_mask */
945 0, /* dst_mask */
946 FALSE), /* pcrel_offset */
947
948 /* Computes the load module index of the load module that contains the
949 definition of its TLS sym. */
950 HOWTO (R_PPC_DTPMOD32,
951 0, /* rightshift */
952 2, /* size (0 = byte, 1 = short, 2 = long) */
953 32, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_dont, /* complain_on_overflow */
957 ppc_elf_unhandled_reloc, /* special_function */
958 "R_PPC_DTPMOD32", /* name */
959 FALSE, /* partial_inplace */
960 0, /* src_mask */
961 0xffffffff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 /* Computes a dtv-relative displacement, the difference between the value
965 of sym+add and the base address of the thread-local storage block that
966 contains the definition of sym, minus 0x8000. */
967 HOWTO (R_PPC_DTPREL32,
968 0, /* rightshift */
969 2, /* size (0 = byte, 1 = short, 2 = long) */
970 32, /* bitsize */
971 FALSE, /* pc_relative */
972 0, /* bitpos */
973 complain_overflow_dont, /* complain_on_overflow */
974 ppc_elf_unhandled_reloc, /* special_function */
975 "R_PPC_DTPREL32", /* name */
976 FALSE, /* partial_inplace */
977 0, /* src_mask */
978 0xffffffff, /* dst_mask */
979 FALSE), /* pcrel_offset */
980
981 /* A 16 bit dtprel reloc. */
982 HOWTO (R_PPC_DTPREL16,
983 0, /* rightshift */
984 1, /* size (0 = byte, 1 = short, 2 = long) */
985 16, /* bitsize */
986 FALSE, /* pc_relative */
987 0, /* bitpos */
988 complain_overflow_signed, /* complain_on_overflow */
989 ppc_elf_unhandled_reloc, /* special_function */
990 "R_PPC_DTPREL16", /* name */
991 FALSE, /* partial_inplace */
992 0, /* src_mask */
993 0xffff, /* dst_mask */
994 FALSE), /* pcrel_offset */
995
996 /* Like DTPREL16, but no overflow. */
997 HOWTO (R_PPC_DTPREL16_LO,
998 0, /* rightshift */
999 1, /* size (0 = byte, 1 = short, 2 = long) */
1000 16, /* bitsize */
1001 FALSE, /* pc_relative */
1002 0, /* bitpos */
1003 complain_overflow_dont, /* complain_on_overflow */
1004 ppc_elf_unhandled_reloc, /* special_function */
1005 "R_PPC_DTPREL16_LO", /* name */
1006 FALSE, /* partial_inplace */
1007 0, /* src_mask */
1008 0xffff, /* dst_mask */
1009 FALSE), /* pcrel_offset */
1010
1011 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1012 HOWTO (R_PPC_DTPREL16_HI,
1013 16, /* rightshift */
1014 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 16, /* bitsize */
1016 FALSE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont, /* complain_on_overflow */
1019 ppc_elf_unhandled_reloc, /* special_function */
1020 "R_PPC_DTPREL16_HI", /* name */
1021 FALSE, /* partial_inplace */
1022 0, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE), /* pcrel_offset */
1025
1026 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1027 HOWTO (R_PPC_DTPREL16_HA,
1028 16, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc_elf_unhandled_reloc, /* special_function */
1035 "R_PPC_DTPREL16_HA", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Computes a tp-relative displacement, the difference between the value of
1042 sym+add and the value of the thread pointer (r13). */
1043 HOWTO (R_PPC_TPREL32,
1044 0, /* rightshift */
1045 2, /* size (0 = byte, 1 = short, 2 = long) */
1046 32, /* bitsize */
1047 FALSE, /* pc_relative */
1048 0, /* bitpos */
1049 complain_overflow_dont, /* complain_on_overflow */
1050 ppc_elf_unhandled_reloc, /* special_function */
1051 "R_PPC_TPREL32", /* name */
1052 FALSE, /* partial_inplace */
1053 0, /* src_mask */
1054 0xffffffff, /* dst_mask */
1055 FALSE), /* pcrel_offset */
1056
1057 /* A 16 bit tprel reloc. */
1058 HOWTO (R_PPC_TPREL16,
1059 0, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_signed, /* complain_on_overflow */
1065 ppc_elf_unhandled_reloc, /* special_function */
1066 "R_PPC_TPREL16", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like TPREL16, but no overflow. */
1073 HOWTO (R_PPC_TPREL16_LO,
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc_elf_unhandled_reloc, /* special_function */
1081 "R_PPC_TPREL16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like TPREL16_LO, but next higher group of 16 bits. */
1088 HOWTO (R_PPC_TPREL16_HI,
1089 16, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont, /* complain_on_overflow */
1095 ppc_elf_unhandled_reloc, /* special_function */
1096 "R_PPC_TPREL16_HI", /* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xffff, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like TPREL16_HI, but adjust for low 16 bits. */
1103 HOWTO (R_PPC_TPREL16_HA,
1104 16, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 ppc_elf_unhandled_reloc, /* special_function */
1111 "R_PPC_TPREL16_HA", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xffff, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1118 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1119 to the first entry. */
1120 HOWTO (R_PPC_GOT_TLSGD16,
1121 0, /* rightshift */
1122 1, /* size (0 = byte, 1 = short, 2 = long) */
1123 16, /* bitsize */
1124 FALSE, /* pc_relative */
1125 0, /* bitpos */
1126 complain_overflow_signed, /* complain_on_overflow */
1127 ppc_elf_unhandled_reloc, /* special_function */
1128 "R_PPC_GOT_TLSGD16", /* name */
1129 FALSE, /* partial_inplace */
1130 0, /* src_mask */
1131 0xffff, /* dst_mask */
1132 FALSE), /* pcrel_offset */
1133
1134 /* Like GOT_TLSGD16, but no overflow. */
1135 HOWTO (R_PPC_GOT_TLSGD16_LO,
1136 0, /* rightshift */
1137 1, /* size (0 = byte, 1 = short, 2 = long) */
1138 16, /* bitsize */
1139 FALSE, /* pc_relative */
1140 0, /* bitpos */
1141 complain_overflow_dont, /* complain_on_overflow */
1142 ppc_elf_unhandled_reloc, /* special_function */
1143 "R_PPC_GOT_TLSGD16_LO", /* name */
1144 FALSE, /* partial_inplace */
1145 0, /* src_mask */
1146 0xffff, /* dst_mask */
1147 FALSE), /* pcrel_offset */
1148
1149 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1150 HOWTO (R_PPC_GOT_TLSGD16_HI,
1151 16, /* rightshift */
1152 1, /* size (0 = byte, 1 = short, 2 = long) */
1153 16, /* bitsize */
1154 FALSE, /* pc_relative */
1155 0, /* bitpos */
1156 complain_overflow_dont, /* complain_on_overflow */
1157 ppc_elf_unhandled_reloc, /* special_function */
1158 "R_PPC_GOT_TLSGD16_HI", /* name */
1159 FALSE, /* partial_inplace */
1160 0, /* src_mask */
1161 0xffff, /* dst_mask */
1162 FALSE), /* pcrel_offset */
1163
1164 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1165 HOWTO (R_PPC_GOT_TLSGD16_HA,
1166 16, /* rightshift */
1167 1, /* size (0 = byte, 1 = short, 2 = long) */
1168 16, /* bitsize */
1169 FALSE, /* pc_relative */
1170 0, /* bitpos */
1171 complain_overflow_dont, /* complain_on_overflow */
1172 ppc_elf_unhandled_reloc, /* special_function */
1173 "R_PPC_GOT_TLSGD16_HA", /* name */
1174 FALSE, /* partial_inplace */
1175 0, /* src_mask */
1176 0xffff, /* dst_mask */
1177 FALSE), /* pcrel_offset */
1178
1179 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1180 with values (sym+add)@dtpmod and zero, and computes the offset to the
1181 first entry. */
1182 HOWTO (R_PPC_GOT_TLSLD16,
1183 0, /* rightshift */
1184 1, /* size (0 = byte, 1 = short, 2 = long) */
1185 16, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_signed, /* complain_on_overflow */
1189 ppc_elf_unhandled_reloc, /* special_function */
1190 "R_PPC_GOT_TLSLD16", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xffff, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* Like GOT_TLSLD16, but no overflow. */
1197 HOWTO (R_PPC_GOT_TLSLD16_LO,
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_dont, /* complain_on_overflow */
1204 ppc_elf_unhandled_reloc, /* special_function */
1205 "R_PPC_GOT_TLSLD16_LO", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xffff, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1212 HOWTO (R_PPC_GOT_TLSLD16_HI,
1213 16, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont, /* complain_on_overflow */
1219 ppc_elf_unhandled_reloc, /* special_function */
1220 "R_PPC_GOT_TLSLD16_HI", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xffff, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1227 HOWTO (R_PPC_GOT_TLSLD16_HA,
1228 16, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont, /* complain_on_overflow */
1234 ppc_elf_unhandled_reloc, /* special_function */
1235 "R_PPC_GOT_TLSLD16_HA", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xffff, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1242 the offset to the entry. */
1243 HOWTO (R_PPC_GOT_DTPREL16,
1244 0, /* rightshift */
1245 1, /* size (0 = byte, 1 = short, 2 = long) */
1246 16, /* bitsize */
1247 FALSE, /* pc_relative */
1248 0, /* bitpos */
1249 complain_overflow_signed, /* complain_on_overflow */
1250 ppc_elf_unhandled_reloc, /* special_function */
1251 "R_PPC_GOT_DTPREL16", /* name */
1252 FALSE, /* partial_inplace */
1253 0, /* src_mask */
1254 0xffff, /* dst_mask */
1255 FALSE), /* pcrel_offset */
1256
1257 /* Like GOT_DTPREL16, but no overflow. */
1258 HOWTO (R_PPC_GOT_DTPREL16_LO,
1259 0, /* rightshift */
1260 1, /* size (0 = byte, 1 = short, 2 = long) */
1261 16, /* bitsize */
1262 FALSE, /* pc_relative */
1263 0, /* bitpos */
1264 complain_overflow_dont, /* complain_on_overflow */
1265 ppc_elf_unhandled_reloc, /* special_function */
1266 "R_PPC_GOT_DTPREL16_LO", /* name */
1267 FALSE, /* partial_inplace */
1268 0, /* src_mask */
1269 0xffff, /* dst_mask */
1270 FALSE), /* pcrel_offset */
1271
1272 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1273 HOWTO (R_PPC_GOT_DTPREL16_HI,
1274 16, /* rightshift */
1275 1, /* size (0 = byte, 1 = short, 2 = long) */
1276 16, /* bitsize */
1277 FALSE, /* pc_relative */
1278 0, /* bitpos */
1279 complain_overflow_dont, /* complain_on_overflow */
1280 ppc_elf_unhandled_reloc, /* special_function */
1281 "R_PPC_GOT_DTPREL16_HI", /* name */
1282 FALSE, /* partial_inplace */
1283 0, /* src_mask */
1284 0xffff, /* dst_mask */
1285 FALSE), /* pcrel_offset */
1286
1287 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1288 HOWTO (R_PPC_GOT_DTPREL16_HA,
1289 16, /* rightshift */
1290 1, /* size (0 = byte, 1 = short, 2 = long) */
1291 16, /* bitsize */
1292 FALSE, /* pc_relative */
1293 0, /* bitpos */
1294 complain_overflow_dont, /* complain_on_overflow */
1295 ppc_elf_unhandled_reloc, /* special_function */
1296 "R_PPC_GOT_DTPREL16_HA", /* name */
1297 FALSE, /* partial_inplace */
1298 0, /* src_mask */
1299 0xffff, /* dst_mask */
1300 FALSE), /* pcrel_offset */
1301
1302 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1303 offset to the entry. */
1304 HOWTO (R_PPC_GOT_TPREL16,
1305 0, /* rightshift */
1306 1, /* size (0 = byte, 1 = short, 2 = long) */
1307 16, /* bitsize */
1308 FALSE, /* pc_relative */
1309 0, /* bitpos */
1310 complain_overflow_signed, /* complain_on_overflow */
1311 ppc_elf_unhandled_reloc, /* special_function */
1312 "R_PPC_GOT_TPREL16", /* name */
1313 FALSE, /* partial_inplace */
1314 0, /* src_mask */
1315 0xffff, /* dst_mask */
1316 FALSE), /* pcrel_offset */
1317
1318 /* Like GOT_TPREL16, but no overflow. */
1319 HOWTO (R_PPC_GOT_TPREL16_LO,
1320 0, /* rightshift */
1321 1, /* size (0 = byte, 1 = short, 2 = long) */
1322 16, /* bitsize */
1323 FALSE, /* pc_relative */
1324 0, /* bitpos */
1325 complain_overflow_dont, /* complain_on_overflow */
1326 ppc_elf_unhandled_reloc, /* special_function */
1327 "R_PPC_GOT_TPREL16_LO", /* name */
1328 FALSE, /* partial_inplace */
1329 0, /* src_mask */
1330 0xffff, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1332
1333 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1334 HOWTO (R_PPC_GOT_TPREL16_HI,
1335 16, /* rightshift */
1336 1, /* size (0 = byte, 1 = short, 2 = long) */
1337 16, /* bitsize */
1338 FALSE, /* pc_relative */
1339 0, /* bitpos */
1340 complain_overflow_dont, /* complain_on_overflow */
1341 ppc_elf_unhandled_reloc, /* special_function */
1342 "R_PPC_GOT_TPREL16_HI", /* name */
1343 FALSE, /* partial_inplace */
1344 0, /* src_mask */
1345 0xffff, /* dst_mask */
1346 FALSE), /* pcrel_offset */
1347
1348 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1349 HOWTO (R_PPC_GOT_TPREL16_HA,
1350 16, /* rightshift */
1351 1, /* size (0 = byte, 1 = short, 2 = long) */
1352 16, /* bitsize */
1353 FALSE, /* pc_relative */
1354 0, /* bitpos */
1355 complain_overflow_dont, /* complain_on_overflow */
1356 ppc_elf_unhandled_reloc, /* special_function */
1357 "R_PPC_GOT_TPREL16_HA", /* name */
1358 FALSE, /* partial_inplace */
1359 0, /* src_mask */
1360 0xffff, /* dst_mask */
1361 FALSE), /* pcrel_offset */
1362
1363 /* The remaining relocs are from the Embedded ELF ABI, and are not
1364 in the SVR4 ELF ABI. */
1365
1366 /* 32 bit value resulting from the addend minus the symbol. */
1367 HOWTO (R_PPC_EMB_NADDR32, /* type */
1368 0, /* rightshift */
1369 2, /* size (0 = byte, 1 = short, 2 = long) */
1370 32, /* bitsize */
1371 FALSE, /* pc_relative */
1372 0, /* bitpos */
1373 complain_overflow_bitfield, /* complain_on_overflow */
1374 bfd_elf_generic_reloc, /* special_function */
1375 "R_PPC_EMB_NADDR32", /* name */
1376 FALSE, /* partial_inplace */
1377 0, /* src_mask */
1378 0xffffffff, /* dst_mask */
1379 FALSE), /* pcrel_offset */
1380
1381 /* 16 bit value resulting from the addend minus the symbol. */
1382 HOWTO (R_PPC_EMB_NADDR16, /* type */
1383 0, /* rightshift */
1384 1, /* size (0 = byte, 1 = short, 2 = long) */
1385 16, /* bitsize */
1386 FALSE, /* pc_relative */
1387 0, /* bitpos */
1388 complain_overflow_bitfield, /* complain_on_overflow */
1389 bfd_elf_generic_reloc, /* special_function */
1390 "R_PPC_EMB_NADDR16", /* name */
1391 FALSE, /* partial_inplace */
1392 0, /* src_mask */
1393 0xffff, /* dst_mask */
1394 FALSE), /* pcrel_offset */
1395
1396 /* 16 bit value resulting from the addend minus the symbol. */
1397 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1398 0, /* rightshift */
1399 1, /* size (0 = byte, 1 = short, 2 = long) */
1400 16, /* bitsize */
1401 FALSE, /* pc_relative */
1402 0, /* bitpos */
1403 complain_overflow_dont,/* complain_on_overflow */
1404 bfd_elf_generic_reloc, /* special_function */
1405 "R_PPC_EMB_ADDR16_LO", /* name */
1406 FALSE, /* partial_inplace */
1407 0, /* src_mask */
1408 0xffff, /* dst_mask */
1409 FALSE), /* pcrel_offset */
1410
1411 /* The high order 16 bits of the addend minus the symbol. */
1412 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1413 16, /* rightshift */
1414 1, /* size (0 = byte, 1 = short, 2 = long) */
1415 16, /* bitsize */
1416 FALSE, /* pc_relative */
1417 0, /* bitpos */
1418 complain_overflow_dont, /* complain_on_overflow */
1419 bfd_elf_generic_reloc, /* special_function */
1420 "R_PPC_EMB_NADDR16_HI", /* name */
1421 FALSE, /* partial_inplace */
1422 0, /* src_mask */
1423 0xffff, /* dst_mask */
1424 FALSE), /* pcrel_offset */
1425
1426 /* The high order 16 bits of the result of the addend minus the address,
1427 plus 1 if the contents of the low 16 bits, treated as a signed number,
1428 is negative. */
1429 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1430 16, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_dont, /* complain_on_overflow */
1436 ppc_elf_addr16_ha_reloc, /* special_function */
1437 "R_PPC_EMB_NADDR16_HA", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* 16 bit value resulting from allocating a 4 byte word to hold an
1444 address in the .sdata section, and returning the offset from
1445 _SDA_BASE_ for that relocation. */
1446 HOWTO (R_PPC_EMB_SDAI16, /* type */
1447 0, /* rightshift */
1448 1, /* size (0 = byte, 1 = short, 2 = long) */
1449 16, /* bitsize */
1450 FALSE, /* pc_relative */
1451 0, /* bitpos */
1452 complain_overflow_bitfield, /* complain_on_overflow */
1453 bfd_elf_generic_reloc, /* special_function */
1454 "R_PPC_EMB_SDAI16", /* name */
1455 FALSE, /* partial_inplace */
1456 0, /* src_mask */
1457 0xffff, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1459
1460 /* 16 bit value resulting from allocating a 4 byte word to hold an
1461 address in the .sdata2 section, and returning the offset from
1462 _SDA2_BASE_ for that relocation. */
1463 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1464 0, /* rightshift */
1465 1, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_bitfield, /* complain_on_overflow */
1470 bfd_elf_generic_reloc, /* special_function */
1471 "R_PPC_EMB_SDA2I16", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0xffff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1478 small data items. */
1479 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1480 0, /* rightshift */
1481 1, /* size (0 = byte, 1 = short, 2 = long) */
1482 16, /* bitsize */
1483 FALSE, /* pc_relative */
1484 0, /* bitpos */
1485 complain_overflow_signed, /* complain_on_overflow */
1486 bfd_elf_generic_reloc, /* special_function */
1487 "R_PPC_EMB_SDA2REL", /* name */
1488 FALSE, /* partial_inplace */
1489 0, /* src_mask */
1490 0xffff, /* dst_mask */
1491 FALSE), /* pcrel_offset */
1492
1493 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1494 signed offset from the appropriate base, and filling in the register
1495 field with the appropriate register (0, 2, or 13). */
1496 HOWTO (R_PPC_EMB_SDA21, /* type */
1497 0, /* rightshift */
1498 2, /* size (0 = byte, 1 = short, 2 = long) */
1499 16, /* bitsize */
1500 FALSE, /* pc_relative */
1501 0, /* bitpos */
1502 complain_overflow_signed, /* complain_on_overflow */
1503 bfd_elf_generic_reloc, /* special_function */
1504 "R_PPC_EMB_SDA21", /* name */
1505 FALSE, /* partial_inplace */
1506 0, /* src_mask */
1507 0xffff, /* dst_mask */
1508 FALSE), /* pcrel_offset */
1509
1510 /* Relocation not handled: R_PPC_EMB_MRKREF */
1511 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1512 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1513 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1514 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1515 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1516
1517 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1518 in the 16 bit signed offset from the appropriate base, and filling in the
1519 register field with the appropriate register (0, 2, or 13). */
1520 HOWTO (R_PPC_EMB_RELSDA, /* type */
1521 0, /* rightshift */
1522 1, /* size (0 = byte, 1 = short, 2 = long) */
1523 16, /* bitsize */
1524 TRUE, /* pc_relative */
1525 0, /* bitpos */
1526 complain_overflow_signed, /* complain_on_overflow */
1527 bfd_elf_generic_reloc, /* special_function */
1528 "R_PPC_EMB_RELSDA", /* name */
1529 FALSE, /* partial_inplace */
1530 0, /* src_mask */
1531 0xffff, /* dst_mask */
1532 FALSE), /* pcrel_offset */
1533
1534 /* Phony relocs to handle branch stubs. */
1535 HOWTO (R_PPC_RELAX32, /* type */
1536 0, /* rightshift */
1537 0, /* size */
1538 0, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 bfd_elf_generic_reloc, /* special_function */
1543 "R_PPC_RELAX32", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 0, /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 HOWTO (R_PPC_RELAX32PC, /* type */
1550 0, /* rightshift */
1551 0, /* size */
1552 0, /* bitsize */
1553 FALSE, /* pc_relative */
1554 0, /* bitpos */
1555 complain_overflow_dont, /* complain_on_overflow */
1556 bfd_elf_generic_reloc, /* special_function */
1557 "R_PPC_RELAX32PC", /* name */
1558 FALSE, /* partial_inplace */
1559 0, /* src_mask */
1560 0, /* dst_mask */
1561 FALSE), /* pcrel_offset */
1562
1563 /* GNU extension to record C++ vtable hierarchy. */
1564 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1565 0, /* rightshift */
1566 0, /* size (0 = byte, 1 = short, 2 = long) */
1567 0, /* bitsize */
1568 FALSE, /* pc_relative */
1569 0, /* bitpos */
1570 complain_overflow_dont, /* complain_on_overflow */
1571 NULL, /* special_function */
1572 "R_PPC_GNU_VTINHERIT", /* name */
1573 FALSE, /* partial_inplace */
1574 0, /* src_mask */
1575 0, /* dst_mask */
1576 FALSE), /* pcrel_offset */
1577
1578 /* GNU extension to record C++ vtable member usage. */
1579 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1580 0, /* rightshift */
1581 0, /* size (0 = byte, 1 = short, 2 = long) */
1582 0, /* bitsize */
1583 FALSE, /* pc_relative */
1584 0, /* bitpos */
1585 complain_overflow_dont, /* complain_on_overflow */
1586 NULL, /* special_function */
1587 "R_PPC_GNU_VTENTRY", /* name */
1588 FALSE, /* partial_inplace */
1589 0, /* src_mask */
1590 0, /* dst_mask */
1591 FALSE), /* pcrel_offset */
1592
1593 /* Phony reloc to handle AIX style TOC entries. */
1594 HOWTO (R_PPC_TOC16, /* type */
1595 0, /* rightshift */
1596 1, /* size (0 = byte, 1 = short, 2 = long) */
1597 16, /* bitsize */
1598 FALSE, /* pc_relative */
1599 0, /* bitpos */
1600 complain_overflow_signed, /* complain_on_overflow */
1601 bfd_elf_generic_reloc, /* special_function */
1602 "R_PPC_TOC16", /* name */
1603 FALSE, /* partial_inplace */
1604 0, /* src_mask */
1605 0xffff, /* dst_mask */
1606 FALSE), /* pcrel_offset */
1607 };
1608 \f
1609 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1610
1611 static void
1612 ppc_elf_howto_init (void)
1613 {
1614 unsigned int i, type;
1615
1616 for (i = 0;
1617 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1618 i++)
1619 {
1620 type = ppc_elf_howto_raw[i].type;
1621 if (type >= (sizeof (ppc_elf_howto_table)
1622 / sizeof (ppc_elf_howto_table[0])))
1623 abort ();
1624 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1625 }
1626 }
1627 \f
1628 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
1629
1630 static const int shared_stub_entry[] =
1631 {
1632 0x7c0802a6, /* mflr 0 */
1633 0x429f0005, /* bcl 20, 31, .Lxxx */
1634 0x7d6802a6, /* mflr 11 */
1635 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
1636 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
1637 0x7c0803a6, /* mtlr 0 */
1638 0x7d6903a6, /* mtctr 11 */
1639 0x4e800420, /* bctr */
1640 };
1641
1642 static const int stub_entry[] =
1643 {
1644 0x3d600000, /* lis 11,xxx@ha */
1645 0x396b0000, /* addi 11,11,xxx@l */
1646 0x7d6903a6, /* mtctr 11 */
1647 0x4e800420, /* bctr */
1648 };
1649
1650
1651 static bfd_boolean
1652 ppc_elf_relax_section (bfd *abfd,
1653 asection *isec,
1654 struct bfd_link_info *link_info,
1655 bfd_boolean *again)
1656 {
1657 struct one_fixup
1658 {
1659 struct one_fixup *next;
1660 asection *tsec;
1661 bfd_vma toff;
1662 bfd_vma trampoff;
1663 };
1664
1665 Elf_Internal_Shdr *symtab_hdr;
1666 bfd_byte *contents = NULL;
1667 Elf_Internal_Sym *isymbuf = NULL;
1668 Elf_Internal_Rela *internal_relocs = NULL;
1669 Elf_Internal_Rela *irel, *irelend;
1670 struct one_fixup *fixups = NULL;
1671 bfd_boolean changed;
1672 struct ppc_elf_link_hash_table *ppc_info;
1673 bfd_size_type trampoff;
1674
1675 *again = FALSE;
1676
1677 /* Nothing to do if there are no relocations and no need for
1678 the relax finalize pass. */
1679 if ((isec->flags & SEC_RELOC) == 0
1680 || isec->reloc_count == 0
1681 || link_info->relax_finalizing)
1682 return TRUE;
1683
1684 /* If needed, initialize this section's cooked size. */
1685 if (isec->_cooked_size == 0)
1686 isec->_cooked_size = isec->_raw_size;
1687
1688 trampoff = (isec->_cooked_size + 3) & (bfd_vma) -4;
1689 /* Space for a branch around any trampolines. */
1690 trampoff += 4;
1691
1692 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1693
1694 /* Get a copy of the native relocations. */
1695 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
1696 link_info->keep_memory);
1697 if (internal_relocs == NULL)
1698 goto error_return;
1699
1700 ppc_info = ppc_elf_hash_table (link_info);
1701 irelend = internal_relocs + isec->reloc_count;
1702
1703 /* Get the section contents. */
1704 /* Get cached copy if it exists. */
1705 if (elf_section_data (isec)->this_hdr.contents != NULL)
1706 contents = elf_section_data (isec)->this_hdr.contents;
1707 else
1708 {
1709 /* Go get them off disk. */
1710 contents = bfd_malloc (isec->_raw_size);
1711 if (contents == NULL)
1712 goto error_return;
1713
1714 if (!bfd_get_section_contents (abfd, isec, contents, 0, isec->_raw_size))
1715 goto error_return;
1716 }
1717
1718 for (irel = internal_relocs; irel < irelend; irel++)
1719 {
1720 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
1721 bfd_vma symaddr, reladdr, toff, roff;
1722 asection *tsec;
1723 struct one_fixup *f;
1724 size_t insn_offset = 0;
1725 bfd_vma max_branch_offset, val;
1726 bfd_byte *hit_addr;
1727 unsigned long t0;
1728
1729 switch (r_type)
1730 {
1731 case R_PPC_REL24:
1732 case R_PPC_LOCAL24PC:
1733 case R_PPC_PLTREL24:
1734 max_branch_offset = 1 << 25;
1735 break;
1736
1737 case R_PPC_REL14:
1738 case R_PPC_REL14_BRTAKEN:
1739 case R_PPC_REL14_BRNTAKEN:
1740 max_branch_offset = 1 << 15;
1741 break;
1742
1743 default:
1744 continue;
1745 }
1746
1747 /* Get the value of the symbol referred to by the reloc. */
1748 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1749 {
1750 /* A local symbol. */
1751 Elf_Internal_Sym *isym;
1752
1753 /* Read this BFD's local symbols. */
1754 if (isymbuf == NULL)
1755 {
1756 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1757 if (isymbuf == NULL)
1758 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1759 symtab_hdr->sh_info, 0,
1760 NULL, NULL, NULL);
1761 if (isymbuf == 0)
1762 goto error_return;
1763 }
1764 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1765 if (isym->st_shndx == SHN_UNDEF)
1766 continue; /* We can't do anthing with undefined symbols. */
1767 else if (isym->st_shndx == SHN_ABS)
1768 tsec = bfd_abs_section_ptr;
1769 else if (isym->st_shndx == SHN_COMMON)
1770 tsec = bfd_com_section_ptr;
1771 else
1772 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1773
1774 toff = isym->st_value;
1775 }
1776 else
1777 {
1778 /* Global symbol handling. */
1779 unsigned long indx;
1780 struct elf_link_hash_entry *h;
1781
1782 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1783 h = elf_sym_hashes (abfd)[indx];
1784
1785 while (h->root.type == bfd_link_hash_indirect
1786 || h->root.type == bfd_link_hash_warning)
1787 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1788
1789 if (r_type == R_PPC_PLTREL24
1790 && ppc_info->plt != NULL
1791 && h->plt.offset != (bfd_vma) -1)
1792 {
1793 tsec = ppc_info->plt;
1794 toff = h->plt.offset;
1795 }
1796 else if (h->root.type == bfd_link_hash_defined
1797 || h->root.type == bfd_link_hash_defweak)
1798 {
1799 tsec = h->root.u.def.section;
1800 toff = h->root.u.def.value;
1801 }
1802 else
1803 continue;
1804 }
1805
1806 /* If the branch and target are in the same section, you have
1807 no hope of adding stubs. We'll error out later should the
1808 branch overflow. */
1809 if (tsec == isec)
1810 continue;
1811
1812 toff += irel->r_addend;
1813 if (tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
1814 toff = _bfd_merged_section_offset (abfd, &tsec,
1815 elf_section_data (tsec)->sec_info,
1816 toff, 0);
1817
1818 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
1819
1820 roff = irel->r_offset;
1821
1822 reladdr = (isec->output_section->vma
1823 + isec->output_offset
1824 + roff);
1825
1826 /* If the branch is in range, no need to do anything. */
1827 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
1828 continue;
1829
1830 /* Look for an existing fixup to this address. */
1831 for (f = fixups; f ; f = f->next)
1832 if (f->tsec == tsec && f->toff == toff)
1833 break;
1834
1835 if (f == NULL)
1836 {
1837 size_t size;
1838 unsigned long stub_rtype;
1839
1840 val = trampoff - roff;
1841 if (val >= max_branch_offset)
1842 /* Oh dear, we can't reach a trampoline. Don't try to add
1843 one. We'll report an error later. */
1844 continue;
1845
1846 if (link_info->shared)
1847 {
1848 size = 4 * ARRAY_SIZE (shared_stub_entry);
1849 insn_offset = 12;
1850 stub_rtype = R_PPC_RELAX32PC;
1851 }
1852 else
1853 {
1854 size = 4 * ARRAY_SIZE (stub_entry);
1855 insn_offset = 0;
1856 stub_rtype = R_PPC_RELAX32;
1857 }
1858
1859 /* Hijack the old relocation. Since we need two
1860 relocations for this use a "composite" reloc. */
1861 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1862 stub_rtype);
1863 irel->r_offset = trampoff + insn_offset;
1864
1865 /* Record the fixup so we don't do it again this section. */
1866 f = bfd_malloc (sizeof (*f));
1867 f->next = fixups;
1868 f->tsec = tsec;
1869 f->toff = toff;
1870 f->trampoff = trampoff;
1871 fixups = f;
1872
1873 trampoff += size;
1874 }
1875 else
1876 {
1877 val = f->trampoff - roff;
1878 if (val >= max_branch_offset)
1879 continue;
1880
1881 /* Nop out the reloc, since we're finalizing things here. */
1882 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
1883 }
1884
1885 /* Fix up the existing branch to hit the trampoline. */
1886 hit_addr = contents + roff;
1887 switch (r_type)
1888 {
1889 case R_PPC_REL24:
1890 case R_PPC_LOCAL24PC:
1891 case R_PPC_PLTREL24:
1892 t0 = bfd_get_32 (abfd, hit_addr);
1893 t0 &= ~0x3fffffc;
1894 t0 |= val & 0x3fffffc;
1895 bfd_put_32 (abfd, t0, hit_addr);
1896 break;
1897
1898 case R_PPC_REL14:
1899 case R_PPC_REL14_BRTAKEN:
1900 case R_PPC_REL14_BRNTAKEN:
1901 t0 = bfd_get_32 (abfd, hit_addr);
1902 t0 &= ~0xfffc;
1903 t0 |= val & 0xfffc;
1904 bfd_put_32 (abfd, t0, hit_addr);
1905 break;
1906 }
1907 }
1908
1909 /* Write out the trampolines. */
1910 changed = fixups != NULL;
1911 if (fixups != NULL)
1912 {
1913 const int *stub;
1914 bfd_byte *dest;
1915 bfd_vma val;
1916 int i, size;
1917
1918 do
1919 {
1920 struct one_fixup *f = fixups;
1921 fixups = fixups->next;
1922 free (f);
1923 }
1924 while (fixups);
1925
1926 contents = bfd_realloc (contents, trampoff);
1927 if (contents == NULL)
1928 goto error_return;
1929
1930 isec->_cooked_size = (isec->_cooked_size + 3) & (bfd_vma) -4;
1931 /* Branch around the trampolines. */
1932 val = trampoff - isec->_cooked_size + 0x48000000;
1933 dest = contents + isec->_cooked_size;
1934 isec->_cooked_size = trampoff;
1935 bfd_put_32 (abfd, val, dest);
1936 dest += 4;
1937
1938 if (link_info->shared)
1939 {
1940 stub = shared_stub_entry;
1941 size = ARRAY_SIZE (shared_stub_entry);
1942 }
1943 else
1944 {
1945 stub = stub_entry;
1946 size = ARRAY_SIZE (stub_entry);
1947 }
1948
1949 i = 0;
1950 while (dest < contents + trampoff)
1951 {
1952 bfd_put_32 (abfd, stub[i], dest);
1953 i++;
1954 if (i == size)
1955 i = 0;
1956 dest += 4;
1957 }
1958 BFD_ASSERT (i == 0);
1959 }
1960
1961 if (isymbuf != NULL
1962 && symtab_hdr->contents != (unsigned char *) isymbuf)
1963 {
1964 if (! link_info->keep_memory)
1965 free (isymbuf);
1966 else
1967 {
1968 /* Cache the symbols for elf_link_input_bfd. */
1969 symtab_hdr->contents = (unsigned char *) isymbuf;
1970 }
1971 }
1972
1973 if (contents != NULL
1974 && elf_section_data (isec)->this_hdr.contents != contents)
1975 {
1976 if (!changed && !link_info->keep_memory)
1977 free (contents);
1978 else
1979 {
1980 /* Cache the section contents for elf_link_input_bfd. */
1981 elf_section_data (isec)->this_hdr.contents = contents;
1982 }
1983 }
1984
1985 if (elf_section_data (isec)->relocs != internal_relocs)
1986 {
1987 if (!changed)
1988 free (internal_relocs);
1989 else
1990 elf_section_data (isec)->relocs = internal_relocs;
1991 }
1992
1993 *again = changed;
1994 return TRUE;
1995
1996 error_return:
1997 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
1998 free (isymbuf);
1999 if (contents != NULL
2000 && elf_section_data (isec)->this_hdr.contents != contents)
2001 free (contents);
2002 if (internal_relocs != NULL
2003 && elf_section_data (isec)->relocs != internal_relocs)
2004 free (internal_relocs);
2005 return FALSE;
2006 }
2007 \f
2008 static reloc_howto_type *
2009 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2010 bfd_reloc_code_real_type code)
2011 {
2012 enum elf_ppc_reloc_type r;
2013
2014 /* Initialize howto table if not already done. */
2015 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2016 ppc_elf_howto_init ();
2017
2018 switch (code)
2019 {
2020 default:
2021 return NULL;
2022
2023 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
2024 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
2025 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
2026 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
2027 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
2028 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
2029 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
2030 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
2031 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
2032 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
2033 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
2034 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
2035 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
2036 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
2037 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
2038 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
2039 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
2040 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
2041 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
2042 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
2043 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
2044 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
2045 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
2046 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
2047 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
2048 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
2049 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
2050 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
2051 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
2052 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
2053 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
2054 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
2055 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
2056 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
2057 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
2058 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
2059 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
2060 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
2061 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
2062 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
2063 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
2064 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
2065 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
2066 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
2067 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
2068 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
2069 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
2070 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
2071 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
2072 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
2073 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
2074 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
2075 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
2076 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
2077 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
2078 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
2079 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
2080 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
2081 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
2082 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
2083 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
2084 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
2085 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
2086 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
2087 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
2088 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
2089 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
2090 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
2091 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
2092 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
2093 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
2094 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
2095 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
2096 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
2097 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
2098 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
2099 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
2100 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
2101 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
2102 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2103 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2104 }
2105
2106 return ppc_elf_howto_table[r];
2107 };
2108
2109 /* Set the howto pointer for a PowerPC ELF reloc. */
2110
2111 static void
2112 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2113 arelent *cache_ptr,
2114 Elf_Internal_Rela *dst)
2115 {
2116 /* Initialize howto table if not already done. */
2117 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2118 ppc_elf_howto_init ();
2119
2120 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2121 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2122 }
2123
2124 /* Handle the R_PPC_ADDR16_HA reloc. */
2125
2126 static bfd_reloc_status_type
2127 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2128 arelent *reloc_entry,
2129 asymbol *symbol,
2130 void *data ATTRIBUTE_UNUSED,
2131 asection *input_section,
2132 bfd *output_bfd,
2133 char **error_message ATTRIBUTE_UNUSED)
2134 {
2135 bfd_vma relocation;
2136
2137 if (output_bfd != NULL)
2138 {
2139 reloc_entry->address += input_section->output_offset;
2140 return bfd_reloc_ok;
2141 }
2142
2143 if (reloc_entry->address > input_section->_cooked_size)
2144 return bfd_reloc_outofrange;
2145
2146 if (bfd_is_com_section (symbol->section))
2147 relocation = 0;
2148 else
2149 relocation = symbol->value;
2150
2151 relocation += symbol->section->output_section->vma;
2152 relocation += symbol->section->output_offset;
2153 relocation += reloc_entry->addend;
2154
2155 reloc_entry->addend += (relocation & 0x8000) << 1;
2156
2157 return bfd_reloc_continue;
2158 }
2159
2160 static bfd_reloc_status_type
2161 ppc_elf_unhandled_reloc (bfd *abfd,
2162 arelent *reloc_entry,
2163 asymbol *symbol,
2164 void *data,
2165 asection *input_section,
2166 bfd *output_bfd,
2167 char **error_message)
2168 {
2169 /* If this is a relocatable link (output_bfd test tells us), just
2170 call the generic function. Any adjustment will be done at final
2171 link time. */
2172 if (output_bfd != NULL)
2173 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2174 input_section, output_bfd, error_message);
2175
2176 if (error_message != NULL)
2177 {
2178 static char buf[60];
2179 sprintf (buf, _("generic linker can't handle %s"),
2180 reloc_entry->howto->name);
2181 *error_message = buf;
2182 }
2183 return bfd_reloc_dangerous;
2184 }
2185
2186 /* Fix bad default arch selected for a 32 bit input bfd when the
2187 default is 64 bit. */
2188
2189 static bfd_boolean
2190 ppc_elf_object_p (bfd *abfd)
2191 {
2192 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2193 {
2194 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2195
2196 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2197 {
2198 /* Relies on arch after 64 bit default being 32 bit default. */
2199 abfd->arch_info = abfd->arch_info->next;
2200 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2201 }
2202 }
2203 return TRUE;
2204 }
2205
2206 /* Function to set whether a module needs the -mrelocatable bit set. */
2207
2208 static bfd_boolean
2209 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2210 {
2211 BFD_ASSERT (!elf_flags_init (abfd)
2212 || elf_elfheader (abfd)->e_flags == flags);
2213
2214 elf_elfheader (abfd)->e_flags = flags;
2215 elf_flags_init (abfd) = TRUE;
2216 return TRUE;
2217 }
2218
2219 /* Merge backend specific data from an object file to the output
2220 object file when linking. */
2221
2222 static bfd_boolean
2223 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2224 {
2225 flagword old_flags;
2226 flagword new_flags;
2227 bfd_boolean error;
2228
2229 /* Check if we have the same endianess. */
2230 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
2231 return FALSE;
2232
2233 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2234 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2235 return TRUE;
2236
2237 new_flags = elf_elfheader (ibfd)->e_flags;
2238 old_flags = elf_elfheader (obfd)->e_flags;
2239 if (!elf_flags_init (obfd))
2240 {
2241 /* First call, no flags set. */
2242 elf_flags_init (obfd) = TRUE;
2243 elf_elfheader (obfd)->e_flags = new_flags;
2244 }
2245
2246 /* Compatible flags are ok. */
2247 else if (new_flags == old_flags)
2248 ;
2249
2250 /* Incompatible flags. */
2251 else
2252 {
2253 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
2254 to be linked with either. */
2255 error = FALSE;
2256 if ((new_flags & EF_PPC_RELOCATABLE) != 0
2257 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
2258 {
2259 error = TRUE;
2260 (*_bfd_error_handler)
2261 (_("%s: compiled with -mrelocatable and linked with "
2262 "modules compiled normally"),
2263 bfd_archive_filename (ibfd));
2264 }
2265 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
2266 && (old_flags & EF_PPC_RELOCATABLE) != 0)
2267 {
2268 error = TRUE;
2269 (*_bfd_error_handler)
2270 (_("%s: compiled normally and linked with "
2271 "modules compiled with -mrelocatable"),
2272 bfd_archive_filename (ibfd));
2273 }
2274
2275 /* The output is -mrelocatable-lib iff both the input files are. */
2276 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
2277 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
2278
2279 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
2280 but each input file is either -mrelocatable or -mrelocatable-lib. */
2281 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
2282 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
2283 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
2284 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
2285
2286 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
2287 any module uses it. */
2288 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
2289
2290 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2291 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2292
2293 /* Warn about any other mismatches. */
2294 if (new_flags != old_flags)
2295 {
2296 error = TRUE;
2297 (*_bfd_error_handler)
2298 (_("%s: uses different e_flags (0x%lx) fields "
2299 "than previous modules (0x%lx)"),
2300 bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
2301 }
2302
2303 if (error)
2304 {
2305 bfd_set_error (bfd_error_bad_value);
2306 return FALSE;
2307 }
2308 }
2309
2310 return TRUE;
2311 }
2312 \f
2313 /* Handle a PowerPC specific section when reading an object file. This
2314 is called when elfcode.h finds a section with an unknown type. */
2315
2316 static bfd_boolean
2317 ppc_elf_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, const char *name)
2318 {
2319 asection *newsect;
2320 flagword flags;
2321
2322 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2323 return FALSE;
2324
2325 newsect = hdr->bfd_section;
2326 flags = bfd_get_section_flags (abfd, newsect);
2327 if (hdr->sh_flags & SHF_EXCLUDE)
2328 flags |= SEC_EXCLUDE;
2329
2330 if (hdr->sh_type == SHT_ORDERED)
2331 flags |= SEC_SORT_ENTRIES;
2332
2333 bfd_set_section_flags (abfd, newsect, flags);
2334 return TRUE;
2335 }
2336 \f
2337 /* Set up any other section flags and such that may be necessary. */
2338
2339 static bfd_boolean
2340 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2341 Elf_Internal_Shdr *shdr,
2342 asection *asect)
2343 {
2344 if ((asect->flags & SEC_EXCLUDE) != 0)
2345 shdr->sh_flags |= SHF_EXCLUDE;
2346
2347 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2348 shdr->sh_type = SHT_ORDERED;
2349
2350 return TRUE;
2351 }
2352 \f
2353 /* Find a linker generated pointer with a given addend and type. */
2354
2355 static elf_linker_section_pointers_t *
2356 elf_find_pointer_linker_section
2357 (elf_linker_section_pointers_t *linker_pointers,
2358 bfd_vma addend,
2359 elf_linker_section_t *lsect)
2360 {
2361 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2362 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2363 return linker_pointers;
2364
2365 return NULL;
2366 }
2367 \f
2368 /* Allocate a pointer to live in a linker created section. */
2369
2370 static bfd_boolean
2371 elf_create_pointer_linker_section (bfd *abfd,
2372 struct bfd_link_info *info,
2373 elf_linker_section_t *lsect,
2374 struct elf_link_hash_entry *h,
2375 const Elf_Internal_Rela *rel)
2376 {
2377 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2378 elf_linker_section_pointers_t *linker_section_ptr;
2379 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2380 bfd_size_type amt;
2381
2382 BFD_ASSERT (lsect != NULL);
2383
2384 /* Is this a global symbol? */
2385 if (h != NULL)
2386 {
2387 struct ppc_elf_link_hash_entry *eh;
2388
2389 /* Has this symbol already been allocated? If so, our work is done. */
2390 eh = (struct ppc_elf_link_hash_entry *) h;
2391 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2392 rel->r_addend,
2393 lsect))
2394 return TRUE;
2395
2396 ptr_linker_section_ptr = &eh->linker_section_pointer;
2397 /* Make sure this symbol is output as a dynamic symbol. */
2398 if (h->dynindx == -1)
2399 {
2400 if (! _bfd_elf_link_record_dynamic_symbol (info, h))
2401 return FALSE;
2402 }
2403
2404 if (lsect->rel_section)
2405 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
2406 }
2407 else
2408 {
2409 /* Allocation of a pointer to a local symbol. */
2410 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2411
2412 /* Allocate a table to hold the local symbols if first time. */
2413 if (!ptr)
2414 {
2415 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2416
2417 amt = num_symbols;
2418 amt *= sizeof (elf_linker_section_pointers_t *);
2419 ptr = bfd_zalloc (abfd, amt);
2420
2421 if (!ptr)
2422 return FALSE;
2423
2424 elf_local_ptr_offsets (abfd) = ptr;
2425 }
2426
2427 /* Has this symbol already been allocated? If so, our work is done. */
2428 if (elf_find_pointer_linker_section (ptr[r_symndx],
2429 rel->r_addend,
2430 lsect))
2431 return TRUE;
2432
2433 ptr_linker_section_ptr = &ptr[r_symndx];
2434
2435 if (info->shared)
2436 {
2437 /* If we are generating a shared object, we need to
2438 output a R_<xxx>_RELATIVE reloc so that the
2439 dynamic linker can adjust this GOT entry. */
2440 BFD_ASSERT (lsect->rel_section != NULL);
2441 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
2442 }
2443 }
2444
2445 /* Allocate space for a pointer in the linker section, and allocate
2446 a new pointer record from internal memory. */
2447 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2448 amt = sizeof (elf_linker_section_pointers_t);
2449 linker_section_ptr = bfd_alloc (abfd, amt);
2450
2451 if (!linker_section_ptr)
2452 return FALSE;
2453
2454 linker_section_ptr->next = *ptr_linker_section_ptr;
2455 linker_section_ptr->addend = rel->r_addend;
2456 linker_section_ptr->lsect = lsect;
2457 linker_section_ptr->written_address_p = FALSE;
2458 *ptr_linker_section_ptr = linker_section_ptr;
2459
2460 linker_section_ptr->offset = lsect->section->_raw_size;
2461 lsect->section->_raw_size += 4;
2462
2463 #ifdef DEBUG
2464 fprintf (stderr,
2465 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2466 lsect->name, (long) linker_section_ptr->offset,
2467 (long) lsect->section->_raw_size);
2468 #endif
2469
2470 return TRUE;
2471 }
2472 \f
2473 #define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR)
2474
2475 /* Fill in the address for a pointer generated in a linker section. */
2476
2477 static bfd_vma
2478 elf_finish_pointer_linker_section (bfd *output_bfd,
2479 bfd *input_bfd,
2480 struct bfd_link_info *info,
2481 elf_linker_section_t *lsect,
2482 struct elf_link_hash_entry *h,
2483 bfd_vma relocation,
2484 const Elf_Internal_Rela *rel,
2485 int relative_reloc)
2486 {
2487 elf_linker_section_pointers_t *linker_section_ptr;
2488
2489 BFD_ASSERT (lsect != NULL);
2490
2491 if (h != NULL)
2492 {
2493 /* Handle global symbol. */
2494 struct ppc_elf_link_hash_entry *eh;
2495
2496 eh = (struct ppc_elf_link_hash_entry *) h;
2497 linker_section_ptr
2498 = elf_find_pointer_linker_section (eh->linker_section_pointer,
2499 rel->r_addend,
2500 lsect);
2501
2502 BFD_ASSERT (linker_section_ptr != NULL);
2503
2504 if (! elf_hash_table (info)->dynamic_sections_created
2505 || (info->shared
2506 && info->symbolic
2507 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
2508 {
2509 /* This is actually a static link, or it is a
2510 -Bsymbolic link and the symbol is defined
2511 locally. We must initialize this entry in the
2512 global section.
2513
2514 When doing a dynamic link, we create a .rela.<xxx>
2515 relocation entry to initialize the value. This
2516 is done in the finish_dynamic_symbol routine. */
2517 if (!linker_section_ptr->written_address_p)
2518 {
2519 linker_section_ptr->written_address_p = TRUE;
2520 bfd_put_ptr (output_bfd,
2521 relocation + linker_section_ptr->addend,
2522 (lsect->section->contents
2523 + linker_section_ptr->offset));
2524 }
2525 }
2526 }
2527 else
2528 {
2529 /* Handle local symbol. */
2530 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2531 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
2532 BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
2533 linker_section_ptr = (elf_find_pointer_linker_section
2534 (elf_local_ptr_offsets (input_bfd)[r_symndx],
2535 rel->r_addend,
2536 lsect));
2537
2538 BFD_ASSERT (linker_section_ptr != NULL);
2539
2540 /* Write out pointer if it hasn't been rewritten out before. */
2541 if (!linker_section_ptr->written_address_p)
2542 {
2543 linker_section_ptr->written_address_p = TRUE;
2544 bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
2545 lsect->section->contents + linker_section_ptr->offset);
2546
2547 if (info->shared)
2548 {
2549 /* We need to generate a relative reloc for the dynamic
2550 linker. */
2551
2552 asection *srel = lsect->rel_section;
2553 Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL];
2554 bfd_byte *erel;
2555 const struct elf_backend_data *bed;
2556 unsigned int i;
2557
2558 BFD_ASSERT (srel != NULL);
2559
2560 bed = get_elf_backend_data (output_bfd);
2561 for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
2562 {
2563 outrel[i].r_offset = (lsect->section->output_section->vma
2564 + lsect->section->output_offset
2565 + linker_section_ptr->offset);
2566 outrel[i].r_info = 0;
2567 outrel[i].r_addend = 0;
2568 }
2569 outrel[0].r_info = ELF32_R_INFO (0, relative_reloc);
2570 erel = lsect->section->contents;
2571 erel += (elf_section_data (lsect->section)->rel_count++
2572 * sizeof (Elf32_External_Rela));
2573 bfd_elf32_swap_reloca_out (output_bfd, outrel, erel);
2574 }
2575 }
2576 }
2577
2578 relocation = (lsect->section->output_offset
2579 + linker_section_ptr->offset
2580 - lsect->sym_offset);
2581
2582 #ifdef DEBUG
2583 fprintf (stderr,
2584 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
2585 lsect->name, (long) relocation, (long) relocation);
2586 #endif
2587
2588 /* Subtract out the addend, because it will get added back in by the normal
2589 processing. */
2590 return relocation - linker_section_ptr->addend;
2591 }
2592 \f
2593 /* Create a special linker section */
2594 static elf_linker_section_t *
2595 ppc_elf_create_linker_section (bfd *abfd,
2596 struct bfd_link_info *info,
2597 enum elf_linker_section_enum which)
2598 {
2599 elf_linker_section_t *lsect;
2600 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2601 asection *s;
2602 bfd_size_type amt;
2603 flagword flags;
2604 const char *name;
2605 const char *rel_name;
2606 const char *sym_name;
2607 bfd_vma sym_offset;
2608
2609 /* Both of these sections are (technically) created by the user
2610 putting data in them, so they shouldn't be marked
2611 SEC_LINKER_CREATED.
2612
2613 The linker creates them so it has somewhere to attach their
2614 respective symbols. In fact, if they were empty it would
2615 be OK to leave the symbol set to 0 (or any random number), because
2616 the appropriate register should never be used. */
2617 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
2618 sym_offset = 32768;
2619
2620 switch (which)
2621 {
2622 default:
2623 abort ();
2624 return NULL;
2625
2626 case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
2627 name = ".sdata";
2628 rel_name = ".rela.sdata";
2629 sym_name = "_SDA_BASE_";
2630 break;
2631
2632 case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
2633 name = ".sdata2";
2634 rel_name = ".rela.sdata2";
2635 sym_name = "_SDA2_BASE_";
2636 flags |= SEC_READONLY;
2637 break;
2638 }
2639
2640 /* Record the first bfd that needs the special sections. */
2641 if (!htab->elf.dynobj)
2642 htab->elf.dynobj = abfd;
2643
2644 amt = sizeof (elf_linker_section_t);
2645 lsect = bfd_zalloc (htab->elf.dynobj, amt);
2646
2647 lsect->sym_offset = sym_offset;
2648
2649 /* See if the sections already exist. */
2650 s = bfd_get_section_by_name (htab->elf.dynobj, name);
2651 if (s == NULL || (s->flags & flags) != flags)
2652 {
2653 s = bfd_make_section_anyway (htab->elf.dynobj, name);
2654 if (s == NULL
2655 || !bfd_set_section_flags (htab->elf.dynobj, s, flags))
2656 return NULL;
2657 }
2658 lsect->section = s;
2659
2660 if (bfd_get_section_alignment (htab->elf.dynobj, s) < 2
2661 && !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2662 return NULL;
2663
2664 s->_raw_size = align_power (s->_raw_size, 2);
2665
2666 #ifdef DEBUG
2667 fprintf (stderr, "Creating section %s, current size = %ld\n",
2668 name, (long) s->_raw_size);
2669 #endif
2670
2671 if (sym_name)
2672 {
2673 struct elf_link_hash_entry *h;
2674 struct bfd_link_hash_entry *bh;
2675
2676 #ifdef DEBUG
2677 fprintf (stderr, "Adding %s to section %s\n", sym_name, name);
2678 #endif
2679 bh = bfd_link_hash_lookup (info->hash, sym_name,
2680 FALSE, FALSE, FALSE);
2681
2682 if ((bh == NULL || bh->type == bfd_link_hash_undefined)
2683 && !(_bfd_generic_link_add_one_symbol
2684 (info, abfd, sym_name, BSF_GLOBAL, s, sym_offset, NULL,
2685 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
2686 return NULL;
2687 h = (struct elf_link_hash_entry *) bh;
2688
2689 h->type = STT_OBJECT;
2690 lsect->sym_hash = h;
2691
2692 if (info->shared
2693 && ! _bfd_elf_link_record_dynamic_symbol (info, h))
2694 return NULL;
2695 }
2696
2697 if (info->shared)
2698 {
2699 s = bfd_make_section_anyway (htab->elf.dynobj, rel_name);
2700 lsect->rel_section = s;
2701 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2702 | SEC_LINKER_CREATED | SEC_READONLY);
2703 if (s == NULL
2704 || ! bfd_set_section_flags (htab->elf.dynobj, s, flags)
2705 || ! bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2706 return NULL;
2707 }
2708
2709 return lsect;
2710 }
2711 \f
2712 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
2713 need to bump up the number of section headers. */
2714
2715 static int
2716 ppc_elf_additional_program_headers (bfd *abfd)
2717 {
2718 asection *s;
2719 int ret;
2720
2721 ret = 0;
2722
2723 s = bfd_get_section_by_name (abfd, ".interp");
2724 if (s != NULL)
2725 ++ret;
2726
2727 s = bfd_get_section_by_name (abfd, ".sbss2");
2728 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2729 ++ret;
2730
2731 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2732 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2733 ++ret;
2734
2735 return ret;
2736 }
2737
2738 /* Modify the segment map if needed. */
2739
2740 static bfd_boolean
2741 ppc_elf_modify_segment_map (bfd *abfd ATTRIBUTE_UNUSED)
2742 {
2743 return TRUE;
2744 }
2745 \f
2746 /* The powerpc .got has a blrl instruction in it. Mark it executable. */
2747
2748 static bfd_boolean
2749 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2750 {
2751 struct ppc_elf_link_hash_table *htab;
2752 asection *s;
2753 flagword flags;
2754
2755 if (!_bfd_elf_create_got_section (abfd, info))
2756 return FALSE;
2757
2758 htab = ppc_elf_hash_table (info);
2759 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2760 if (s == NULL)
2761 abort ();
2762
2763 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2764 | SEC_LINKER_CREATED);
2765 if (!bfd_set_section_flags (abfd, s, flags))
2766 return FALSE;
2767
2768 htab->relgot = bfd_make_section (abfd, ".rela.got");
2769 if (!htab->relgot
2770 || ! bfd_set_section_flags (abfd, htab->relgot,
2771 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2772 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2773 | SEC_READONLY))
2774 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2775 return FALSE;
2776
2777 return TRUE;
2778 }
2779
2780 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2781 to output sections (just like _bfd_elf_create_dynamic_sections has
2782 to create .dynbss and .rela.bss). */
2783
2784 static bfd_boolean
2785 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2786 {
2787 struct ppc_elf_link_hash_table *htab;
2788 asection *s;
2789 flagword flags;
2790
2791 htab = ppc_elf_hash_table (info);
2792
2793 if (htab->got == NULL
2794 && !ppc_elf_create_got (abfd, info))
2795 return FALSE;
2796
2797 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2798 return FALSE;
2799
2800 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2801 | SEC_LINKER_CREATED);
2802
2803 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2804 htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
2805 if (s == NULL
2806 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
2807 return FALSE;
2808
2809 if (! info->shared)
2810 {
2811 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2812 htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss");
2813 if (s == NULL
2814 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
2815 || ! bfd_set_section_alignment (abfd, s, 2))
2816 return FALSE;
2817 }
2818
2819 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2820 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2821 if (s == NULL)
2822 abort ();
2823
2824 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
2825 return bfd_set_section_flags (abfd, s, flags);
2826 }
2827
2828 /* Adjust a symbol defined by a dynamic object and referenced by a
2829 regular object. The current definition is in some section of the
2830 dynamic object, but we're not including those sections. We have to
2831 change the definition to something the rest of the link can
2832 understand. */
2833
2834 static bfd_boolean
2835 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2836 struct elf_link_hash_entry *h)
2837 {
2838 struct ppc_elf_link_hash_table *htab;
2839 asection *s;
2840 unsigned int power_of_two;
2841
2842 #ifdef DEBUG
2843 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
2844 h->root.root.string);
2845 #endif
2846
2847 /* Make sure we know what is going on here. */
2848 htab = ppc_elf_hash_table (info);
2849 BFD_ASSERT (htab->elf.dynobj != NULL
2850 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2851 || h->weakdef != NULL
2852 || ((h->elf_link_hash_flags
2853 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2854 && (h->elf_link_hash_flags
2855 & ELF_LINK_HASH_REF_REGULAR) != 0
2856 && (h->elf_link_hash_flags
2857 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2858
2859 /* Deal with function syms. */
2860 if (h->type == STT_FUNC
2861 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2862 {
2863 /* Clear procedure linkage table information for any symbol that
2864 won't need a .plt entry. */
2865 if (h->plt.refcount <= 0
2866 || SYMBOL_CALLS_LOCAL (info, h)
2867 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2868 && h->root.type == bfd_link_hash_undefweak))
2869 {
2870 /* A PLT entry is not required/allowed when:
2871
2872 1. We are not using ld.so; because then the PLT entry
2873 can't be set up, so we can't use one. In this case,
2874 ppc_elf_adjust_dynamic_symbol won't even be called.
2875
2876 2. GC has rendered the entry unused.
2877
2878 3. We know for certain that a call to this symbol
2879 will go to this object, or will remain undefined. */
2880 h->plt.offset = (bfd_vma) -1;
2881 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2882 }
2883 return TRUE;
2884 }
2885 else
2886 h->plt.offset = (bfd_vma) -1;
2887
2888 /* If this is a weak symbol, and there is a real definition, the
2889 processor independent code will have arranged for us to see the
2890 real definition first, and we can just use the same value. */
2891 if (h->weakdef != NULL)
2892 {
2893 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2894 || h->weakdef->root.type == bfd_link_hash_defweak);
2895 h->root.u.def.section = h->weakdef->root.u.def.section;
2896 h->root.u.def.value = h->weakdef->root.u.def.value;
2897 if (ELIMINATE_COPY_RELOCS)
2898 h->elf_link_hash_flags
2899 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
2900 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
2901 return TRUE;
2902 }
2903
2904 /* This is a reference to a symbol defined by a dynamic object which
2905 is not a function. */
2906
2907 /* If we are creating a shared library, we must presume that the
2908 only references to the symbol are via the global offset table.
2909 For such cases we need not do anything here; the relocations will
2910 be handled correctly by relocate_section. */
2911 if (info->shared)
2912 return TRUE;
2913
2914 /* If there are no references to this symbol that do not use the
2915 GOT, we don't need to generate a copy reloc. */
2916 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
2917 return TRUE;
2918
2919 if (ELIMINATE_COPY_RELOCS)
2920 {
2921 struct ppc_elf_dyn_relocs *p;
2922 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
2923 {
2924 s = p->sec->output_section;
2925 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2926 break;
2927 }
2928
2929 /* If we didn't find any dynamic relocs in read-only sections, then
2930 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2931 if (p == NULL)
2932 {
2933 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
2934 return TRUE;
2935 }
2936 }
2937
2938 /* We must allocate the symbol in our .dynbss section, which will
2939 become part of the .bss section of the executable. There will be
2940 an entry for this symbol in the .dynsym section. The dynamic
2941 object will contain position independent code, so all references
2942 from the dynamic object to this symbol will go through the global
2943 offset table. The dynamic linker will use the .dynsym entry to
2944 determine the address it must put in the global offset table, so
2945 both the dynamic object and the regular object will refer to the
2946 same memory location for the variable.
2947
2948 Of course, if the symbol is sufficiently small, we must instead
2949 allocate it in .sbss. FIXME: It would be better to do this if and
2950 only if there were actually SDAREL relocs for that symbol. */
2951
2952 if (h->size <= elf_gp_size (htab->elf.dynobj))
2953 s = htab->dynsbss;
2954 else
2955 s = htab->dynbss;
2956 BFD_ASSERT (s != NULL);
2957
2958 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
2959 copy the initial value out of the dynamic object and into the
2960 runtime process image. We need to remember the offset into the
2961 .rela.bss section we are going to use. */
2962 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2963 {
2964 asection *srel;
2965
2966 if (h->size <= elf_gp_size (htab->elf.dynobj))
2967 srel = htab->relsbss;
2968 else
2969 srel = htab->relbss;
2970 BFD_ASSERT (srel != NULL);
2971 srel->_raw_size += sizeof (Elf32_External_Rela);
2972 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2973 }
2974
2975 /* We need to figure out the alignment required for this symbol. I
2976 have no idea how ELF linkers handle this. */
2977 power_of_two = bfd_log2 (h->size);
2978 if (power_of_two > 4)
2979 power_of_two = 4;
2980
2981 /* Apply the required alignment. */
2982 s->_raw_size = BFD_ALIGN (s->_raw_size,
2983 (bfd_size_type) (1 << power_of_two));
2984 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
2985 {
2986 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
2987 return FALSE;
2988 }
2989
2990 /* Define the symbol as being at this point in the section. */
2991 h->root.u.def.section = s;
2992 h->root.u.def.value = s->_raw_size;
2993
2994 /* Increment the section size to make room for the symbol. */
2995 s->_raw_size += h->size;
2996
2997 return TRUE;
2998 }
2999 \f
3000 /* This is the condition under which finish_dynamic_symbol will be
3001 called from elflink.h. If elflink.h doesn't call our
3002 finish_dynamic_symbol routine, we'll need to do something about
3003 initializing any .plt and .got entries in relocate_section. */
3004 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
3005 ((DYN) \
3006 && ((SHARED) \
3007 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
3008 && ((H)->dynindx != -1 \
3009 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
3010
3011 /* Of those relocs that might be copied as dynamic relocs, this macro
3012 selects those that must be copied when linking a shared library,
3013 even when the symbol is local. */
3014
3015 #define MUST_BE_DYN_RELOC(RTYPE) \
3016 ((RTYPE) != R_PPC_REL24 \
3017 && (RTYPE) != R_PPC_REL14 \
3018 && (RTYPE) != R_PPC_REL14_BRTAKEN \
3019 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
3020 && (RTYPE) != R_PPC_REL32)
3021
3022 /* Allocate space in associated reloc sections for dynamic relocs. */
3023
3024 static bfd_boolean
3025 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3026 {
3027 struct bfd_link_info *info = inf;
3028 struct ppc_elf_link_hash_entry *eh;
3029 struct ppc_elf_link_hash_table *htab;
3030 struct ppc_elf_dyn_relocs *p;
3031
3032 if (h->root.type == bfd_link_hash_indirect)
3033 return TRUE;
3034
3035 if (h->root.type == bfd_link_hash_warning)
3036 /* When warning symbols are created, they **replace** the "real"
3037 entry in the hash table, thus we never get to see the real
3038 symbol in a hash traversal. So look at it now. */
3039 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3040
3041 htab = ppc_elf_hash_table (info);
3042 if (htab->elf.dynamic_sections_created
3043 && h->plt.refcount > 0)
3044 {
3045 /* Make sure this symbol is output as a dynamic symbol. */
3046 if (h->dynindx == -1
3047 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3048 {
3049 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
3050 return FALSE;
3051 }
3052
3053 if (info->shared
3054 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3055 {
3056 asection *s = htab->plt;
3057
3058 /* If this is the first .plt entry, make room for the special
3059 first entry. */
3060 if (s->_raw_size == 0)
3061 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
3062
3063 /* The PowerPC PLT is actually composed of two parts, the
3064 first part is 2 words (for a load and a jump), and then
3065 there is a remaining word available at the end. */
3066 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
3067 + (PLT_SLOT_SIZE
3068 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE)
3069 / PLT_ENTRY_SIZE)));
3070
3071 /* If this symbol is not defined in a regular file, and we
3072 are not generating a shared library, then set the symbol
3073 to this location in the .plt. This is required to make
3074 function pointers compare as equal between the normal
3075 executable and the shared library. */
3076 if (! info->shared
3077 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3078 {
3079 h->root.u.def.section = s;
3080 h->root.u.def.value = h->plt.offset;
3081 }
3082
3083 /* Make room for this entry. After the 8192nd entry, room
3084 for two entries is allocated. */
3085 s->_raw_size += PLT_ENTRY_SIZE;
3086 if ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
3087 > PLT_NUM_SINGLE_ENTRIES)
3088 s->_raw_size += PLT_ENTRY_SIZE;
3089
3090 /* We also need to make an entry in the .rela.plt section. */
3091 htab->relplt->_raw_size += sizeof (Elf32_External_Rela);
3092 }
3093 else
3094 {
3095 h->plt.offset = (bfd_vma) -1;
3096 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3097 }
3098 }
3099 else
3100 {
3101 h->plt.offset = (bfd_vma) -1;
3102 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3103 }
3104
3105 eh = (struct ppc_elf_link_hash_entry *) h;
3106 if (eh->elf.got.refcount > 0)
3107 {
3108 /* Make sure this symbol is output as a dynamic symbol. */
3109 if (eh->elf.dynindx == -1
3110 && (eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3111 {
3112 if (!bfd_elf32_link_record_dynamic_symbol (info, &eh->elf))
3113 return FALSE;
3114 }
3115
3116 if (eh->tls_mask == (TLS_TLS | TLS_LD)
3117 && !(eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
3118 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
3119 eh->elf.got.offset = (bfd_vma) -1;
3120 else
3121 {
3122 bfd_boolean dyn;
3123 eh->elf.got.offset = htab->got->_raw_size;
3124 if ((eh->tls_mask & TLS_TLS) != 0)
3125 {
3126 if ((eh->tls_mask & TLS_LD) != 0)
3127 htab->got->_raw_size += 8;
3128 if ((eh->tls_mask & TLS_GD) != 0)
3129 htab->got->_raw_size += 8;
3130 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
3131 htab->got->_raw_size += 4;
3132 if ((eh->tls_mask & TLS_DTPREL) != 0)
3133 htab->got->_raw_size += 4;
3134 }
3135 else
3136 htab->got->_raw_size += 4;
3137 dyn = htab->elf.dynamic_sections_created;
3138 if ((info->shared
3139 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
3140 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
3141 || eh->elf.root.type != bfd_link_hash_undefweak))
3142 {
3143 /* All the entries we allocated need relocs. */
3144 htab->relgot->_raw_size
3145 += ((htab->got->_raw_size - eh->elf.got.offset) / 4
3146 * sizeof (Elf32_External_Rela));
3147 /* Except LD only needs one. */
3148 if ((eh->tls_mask & TLS_LD) != 0)
3149 htab->relgot->_raw_size -= sizeof (Elf32_External_Rela);
3150 }
3151 }
3152 }
3153 else
3154 eh->elf.got.offset = (bfd_vma) -1;
3155
3156 if (eh->dyn_relocs == NULL)
3157 return TRUE;
3158
3159 /* In the shared -Bsymbolic case, discard space allocated for
3160 dynamic pc-relative relocs against symbols which turn out to be
3161 defined in regular objects. For the normal shared case, discard
3162 space for relocs that have become local due to symbol visibility
3163 changes. */
3164
3165 if (info->shared)
3166 {
3167 /* Relocs that use pc_count are those that appear on a call insn,
3168 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
3169 generated via assembly. We want calls to protected symbols to
3170 resolve directly to the function rather than going via the plt.
3171 If people want function pointer comparisons to work as expected
3172 then they should avoid writing weird assembly. */
3173 if (SYMBOL_CALLS_LOCAL (info, h))
3174 {
3175 struct ppc_elf_dyn_relocs **pp;
3176
3177 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3178 {
3179 p->count -= p->pc_count;
3180 p->pc_count = 0;
3181 if (p->count == 0)
3182 *pp = p->next;
3183 else
3184 pp = &p->next;
3185 }
3186 }
3187
3188 /* Also discard relocs on undefined weak syms with non-default
3189 visibility. */
3190 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3191 && h->root.type == bfd_link_hash_undefweak)
3192 eh->dyn_relocs = NULL;
3193 }
3194 else if (ELIMINATE_COPY_RELOCS)
3195 {
3196 /* For the non-shared case, discard space for relocs against
3197 symbols which turn out to need copy relocs or are not
3198 dynamic. */
3199
3200 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3201 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3202 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3203 {
3204 /* Make sure this symbol is output as a dynamic symbol.
3205 Undefined weak syms won't yet be marked as dynamic. */
3206 if (h->dynindx == -1
3207 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3208 {
3209 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
3210 return FALSE;
3211 }
3212
3213 /* If that succeeded, we know we'll be keeping all the
3214 relocs. */
3215 if (h->dynindx != -1)
3216 goto keep;
3217 }
3218
3219 eh->dyn_relocs = NULL;
3220
3221 keep: ;
3222 }
3223
3224 /* Finally, allocate space. */
3225 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3226 {
3227 asection *sreloc = elf_section_data (p->sec)->sreloc;
3228 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
3229 }
3230
3231 return TRUE;
3232 }
3233
3234 /* Find any dynamic relocs that apply to read-only sections. */
3235
3236 static bfd_boolean
3237 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
3238 {
3239 struct ppc_elf_dyn_relocs *p;
3240
3241 if (h->root.type == bfd_link_hash_indirect)
3242 return TRUE;
3243
3244 if (h->root.type == bfd_link_hash_warning)
3245 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3246
3247 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3248 {
3249 asection *s = p->sec->output_section;
3250
3251 if (s != NULL
3252 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
3253 == (SEC_READONLY | SEC_ALLOC)))
3254 {
3255 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
3256
3257 /* Not an error, just cut short the traversal. */
3258 return FALSE;
3259 }
3260 }
3261 return TRUE;
3262 }
3263
3264 /* Set the sizes of the dynamic sections. */
3265
3266 static bfd_boolean
3267 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3268 struct bfd_link_info *info)
3269 {
3270 struct ppc_elf_link_hash_table *htab;
3271 asection *s;
3272 bfd_boolean relocs;
3273 bfd *ibfd;
3274
3275 #ifdef DEBUG
3276 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
3277 #endif
3278
3279 htab = ppc_elf_hash_table (info);
3280 BFD_ASSERT (htab->elf.dynobj != NULL);
3281
3282 if (elf_hash_table (info)->dynamic_sections_created)
3283 {
3284 /* Set the contents of the .interp section to the interpreter. */
3285 if (info->executable)
3286 {
3287 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
3288 BFD_ASSERT (s != NULL);
3289 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3290 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3291 }
3292 }
3293
3294 if (htab->tlsld_got.refcount > 0)
3295 {
3296 htab->tlsld_got.offset = htab->got->_raw_size;
3297 htab->got->_raw_size += 8;
3298 if (info->shared)
3299 htab->relgot->_raw_size += sizeof (Elf32_External_Rela);
3300 }
3301 else
3302 htab->tlsld_got.offset = (bfd_vma) -1;
3303
3304 /* Set up .got offsets for local syms, and space for local dynamic
3305 relocs. */
3306 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3307 {
3308 bfd_signed_vma *local_got;
3309 bfd_signed_vma *end_local_got;
3310 char *lgot_masks;
3311 bfd_size_type locsymcount;
3312 Elf_Internal_Shdr *symtab_hdr;
3313 asection *srel;
3314
3315 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
3316 continue;
3317
3318 for (s = ibfd->sections; s != NULL; s = s->next)
3319 {
3320 struct ppc_elf_dyn_relocs *p;
3321
3322 for (p = ((struct ppc_elf_dyn_relocs *)
3323 elf_section_data (s)->local_dynrel);
3324 p != NULL;
3325 p = p->next)
3326 {
3327 if (!bfd_is_abs_section (p->sec)
3328 && bfd_is_abs_section (p->sec->output_section))
3329 {
3330 /* Input section has been discarded, either because
3331 it is a copy of a linkonce section or due to
3332 linker script /DISCARD/, so we'll be discarding
3333 the relocs too. */
3334 }
3335 else if (p->count != 0)
3336 {
3337 elf_section_data (p->sec)->sreloc->_raw_size
3338 += p->count * sizeof (Elf32_External_Rela);
3339 if ((p->sec->output_section->flags
3340 & (SEC_READONLY | SEC_ALLOC))
3341 == (SEC_READONLY | SEC_ALLOC))
3342 info->flags |= DF_TEXTREL;
3343 }
3344 }
3345 }
3346
3347 local_got = elf_local_got_refcounts (ibfd);
3348 if (!local_got)
3349 continue;
3350
3351 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3352 locsymcount = symtab_hdr->sh_info;
3353 end_local_got = local_got + locsymcount;
3354 lgot_masks = (char *) end_local_got;
3355 s = htab->got;
3356 srel = htab->relgot;
3357 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3358 if (*local_got > 0)
3359 {
3360 if (*lgot_masks == (TLS_TLS | TLS_LD))
3361 {
3362 /* If just an LD reloc, we'll just use
3363 htab->tlsld_got.offset. */
3364 if (htab->tlsld_got.offset == (bfd_vma) -1)
3365 {
3366 htab->tlsld_got.offset = s->_raw_size;
3367 s->_raw_size += 8;
3368 if (info->shared)
3369 srel->_raw_size += sizeof (Elf32_External_Rela);
3370 }
3371 *local_got = (bfd_vma) -1;
3372 }
3373 else
3374 {
3375 *local_got = s->_raw_size;
3376 if ((*lgot_masks & TLS_TLS) != 0)
3377 {
3378 if ((*lgot_masks & TLS_GD) != 0)
3379 s->_raw_size += 8;
3380 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
3381 s->_raw_size += 4;
3382 if ((*lgot_masks & TLS_DTPREL) != 0)
3383 s->_raw_size += 4;
3384 }
3385 else
3386 s->_raw_size += 4;
3387 if (info->shared)
3388 srel->_raw_size += ((s->_raw_size - *local_got) / 4
3389 * sizeof (Elf32_External_Rela));
3390 }
3391 }
3392 else
3393 *local_got = (bfd_vma) -1;
3394 }
3395
3396 /* Allocate space for global sym dynamic relocs. */
3397 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3398
3399 /* We've now determined the sizes of the various dynamic sections.
3400 Allocate memory for them. */
3401 relocs = FALSE;
3402 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
3403 {
3404 if ((s->flags & SEC_LINKER_CREATED) == 0)
3405 continue;
3406
3407 if (s == htab->plt
3408 || s == htab->got
3409 || (htab->sdata != NULL && s == htab->sdata->section)
3410 || (htab->sdata2 != NULL && s == htab->sdata2->section))
3411 {
3412 /* Strip this section if we don't need it; see the
3413 comment below. */
3414 }
3415 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
3416 {
3417 if (s->_raw_size == 0)
3418 {
3419 /* If we don't need this section, strip it from the
3420 output file. This is mostly to handle .rela.bss and
3421 .rela.plt. We must create both sections in
3422 create_dynamic_sections, because they must be created
3423 before the linker maps input sections to output
3424 sections. The linker does that before
3425 adjust_dynamic_symbol is called, and it is that
3426 function which decides whether anything needs to go
3427 into these sections. */
3428 }
3429 else
3430 {
3431 /* Remember whether there are any relocation sections. */
3432 relocs = TRUE;
3433
3434 /* We use the reloc_count field as a counter if we need
3435 to copy relocs into the output file. */
3436 s->reloc_count = 0;
3437 }
3438 }
3439 else
3440 {
3441 /* It's not one of our sections, so don't allocate space. */
3442 continue;
3443 }
3444
3445 if (s->_raw_size == 0)
3446 {
3447 _bfd_strip_section_from_output (info, s);
3448 continue;
3449 }
3450
3451 /* Allocate memory for the section contents. */
3452 s->contents = bfd_zalloc (htab->elf.dynobj, s->_raw_size);
3453 if (s->contents == NULL)
3454 return FALSE;
3455 }
3456
3457 if (htab->elf.dynamic_sections_created)
3458 {
3459 /* Add some entries to the .dynamic section. We fill in the
3460 values later, in ppc_elf_finish_dynamic_sections, but we
3461 must add the entries now so that we get the correct size for
3462 the .dynamic section. The DT_DEBUG entry is filled in by the
3463 dynamic linker and used by the debugger. */
3464 #define add_dynamic_entry(TAG, VAL) \
3465 bfd_elf32_add_dynamic_entry (info, (TAG), (VAL))
3466
3467 if (info->executable)
3468 {
3469 if (!add_dynamic_entry (DT_DEBUG, 0))
3470 return FALSE;
3471 }
3472
3473 if (htab->plt != NULL && htab->plt->_raw_size != 0)
3474 {
3475 if (!add_dynamic_entry (DT_PLTGOT, 0)
3476 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3477 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3478 || !add_dynamic_entry (DT_JMPREL, 0))
3479 return FALSE;
3480 }
3481
3482 if (relocs)
3483 {
3484 if (!add_dynamic_entry (DT_RELA, 0)
3485 || !add_dynamic_entry (DT_RELASZ, 0)
3486 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3487 return FALSE;
3488 }
3489
3490 /* If any dynamic relocs apply to a read-only section, then we
3491 need a DT_TEXTREL entry. */
3492 if ((info->flags & DF_TEXTREL) == 0)
3493 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
3494 info);
3495
3496 if ((info->flags & DF_TEXTREL) != 0)
3497 {
3498 if (!add_dynamic_entry (DT_TEXTREL, 0))
3499 return FALSE;
3500 }
3501 }
3502 #undef add_dynamic_entry
3503
3504 return TRUE;
3505 }
3506 \f
3507 static bfd_boolean
3508 update_local_sym_info (bfd *abfd,
3509 Elf_Internal_Shdr *symtab_hdr,
3510 unsigned long r_symndx,
3511 int tls_type)
3512 {
3513 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3514 char *local_got_tls_masks;
3515
3516 if (local_got_refcounts == NULL)
3517 {
3518 bfd_size_type size = symtab_hdr->sh_info;
3519
3520 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3521 local_got_refcounts = bfd_zalloc (abfd, size);
3522 if (local_got_refcounts == NULL)
3523 return FALSE;
3524 elf_local_got_refcounts (abfd) = local_got_refcounts;
3525 }
3526
3527 local_got_refcounts[r_symndx] += 1;
3528 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3529 local_got_tls_masks[r_symndx] |= tls_type;
3530 return TRUE;
3531 }
3532
3533 static void
3534 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3535 {
3536 (*_bfd_error_handler)
3537 (_("%s: relocation %s cannot be used when making a shared object"),
3538 bfd_archive_filename (abfd),
3539 ppc_elf_howto_table[r_type]->name);
3540 bfd_set_error (bfd_error_bad_value);
3541 }
3542
3543 /* Look through the relocs for a section during the first phase, and
3544 allocate space in the global offset table or procedure linkage
3545 table. */
3546
3547 static bfd_boolean
3548 ppc_elf_check_relocs (bfd *abfd,
3549 struct bfd_link_info *info,
3550 asection *sec,
3551 const Elf_Internal_Rela *relocs)
3552 {
3553 struct ppc_elf_link_hash_table *htab;
3554 Elf_Internal_Shdr *symtab_hdr;
3555 struct elf_link_hash_entry **sym_hashes;
3556 const Elf_Internal_Rela *rel;
3557 const Elf_Internal_Rela *rel_end;
3558 asection *sreloc;
3559
3560 if (info->relocatable)
3561 return TRUE;
3562
3563 #ifdef DEBUG
3564 fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n",
3565 bfd_get_section_name (abfd, sec),
3566 bfd_archive_filename (abfd));
3567 #endif
3568
3569 /* Initialize howto table if not already done. */
3570 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3571 ppc_elf_howto_init ();
3572
3573 /* Create the linker generated sections all the time so that the
3574 special symbols are created. */
3575 htab = ppc_elf_hash_table (info);
3576 if (htab->sdata == NULL)
3577 {
3578 htab->sdata = ppc_elf_create_linker_section (abfd, info,
3579 LINKER_SECTION_SDATA);
3580 if (htab->sdata == NULL)
3581 return FALSE;
3582 }
3583
3584 if (htab->sdata2 == NULL)
3585 {
3586 htab->sdata2 = ppc_elf_create_linker_section (abfd, info,
3587 LINKER_SECTION_SDATA2);
3588 if (htab->sdata2 == NULL)
3589 return FALSE;
3590 }
3591
3592 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3593 sym_hashes = elf_sym_hashes (abfd);
3594 sreloc = NULL;
3595
3596 rel_end = relocs + sec->reloc_count;
3597 for (rel = relocs; rel < rel_end; rel++)
3598 {
3599 unsigned long r_symndx;
3600 enum elf_ppc_reloc_type r_type;
3601 struct elf_link_hash_entry *h;
3602 int tls_type = 0;
3603
3604 r_symndx = ELF32_R_SYM (rel->r_info);
3605 if (r_symndx < symtab_hdr->sh_info)
3606 h = NULL;
3607 else
3608 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3609
3610 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3611 This shows up in particular in an R_PPC_ADDR32 in the eabi
3612 startup code. */
3613 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3614 {
3615 if (htab->got == NULL)
3616 {
3617 if (htab->elf.dynobj == NULL)
3618 htab->elf.dynobj = abfd;
3619 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3620 return FALSE;
3621 }
3622 }
3623
3624 r_type = ELF32_R_TYPE (rel->r_info);
3625 switch (r_type)
3626 {
3627 case R_PPC_GOT_TLSLD16:
3628 case R_PPC_GOT_TLSLD16_LO:
3629 case R_PPC_GOT_TLSLD16_HI:
3630 case R_PPC_GOT_TLSLD16_HA:
3631 htab->tlsld_got.refcount += 1;
3632 tls_type = TLS_TLS | TLS_LD;
3633 goto dogottls;
3634
3635 case R_PPC_GOT_TLSGD16:
3636 case R_PPC_GOT_TLSGD16_LO:
3637 case R_PPC_GOT_TLSGD16_HI:
3638 case R_PPC_GOT_TLSGD16_HA:
3639 tls_type = TLS_TLS | TLS_GD;
3640 goto dogottls;
3641
3642 case R_PPC_GOT_TPREL16:
3643 case R_PPC_GOT_TPREL16_LO:
3644 case R_PPC_GOT_TPREL16_HI:
3645 case R_PPC_GOT_TPREL16_HA:
3646 if (info->shared)
3647 info->flags |= DF_STATIC_TLS;
3648 tls_type = TLS_TLS | TLS_TPREL;
3649 goto dogottls;
3650
3651 case R_PPC_GOT_DTPREL16:
3652 case R_PPC_GOT_DTPREL16_LO:
3653 case R_PPC_GOT_DTPREL16_HI:
3654 case R_PPC_GOT_DTPREL16_HA:
3655 tls_type = TLS_TLS | TLS_DTPREL;
3656 dogottls:
3657 sec->has_tls_reloc = 1;
3658 /* Fall thru */
3659
3660 /* GOT16 relocations */
3661 case R_PPC_GOT16:
3662 case R_PPC_GOT16_LO:
3663 case R_PPC_GOT16_HI:
3664 case R_PPC_GOT16_HA:
3665 /* This symbol requires a global offset table entry. */
3666 if (htab->got == NULL)
3667 {
3668 if (htab->elf.dynobj == NULL)
3669 htab->elf.dynobj = abfd;
3670 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3671 return FALSE;
3672 }
3673 if (h != NULL)
3674 {
3675 h->got.refcount += 1;
3676 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3677 }
3678 else
3679 /* This is a global offset table entry for a local symbol. */
3680 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3681 return FALSE;
3682 break;
3683
3684 /* Indirect .sdata relocation. */
3685 case R_PPC_EMB_SDAI16:
3686 if (info->shared)
3687 {
3688 bad_shared_reloc (abfd, r_type);
3689 return FALSE;
3690 }
3691 if (!elf_create_pointer_linker_section (abfd, info,
3692 htab->sdata, h, rel))
3693 return FALSE;
3694 break;
3695
3696 /* Indirect .sdata2 relocation. */
3697 case R_PPC_EMB_SDA2I16:
3698 if (info->shared)
3699 {
3700 bad_shared_reloc (abfd, r_type);
3701 return FALSE;
3702 }
3703 if (!elf_create_pointer_linker_section (abfd, info,
3704 htab->sdata2, h, rel))
3705 return FALSE;
3706 break;
3707
3708 case R_PPC_SDAREL16:
3709 case R_PPC_EMB_SDA2REL:
3710 case R_PPC_EMB_SDA21:
3711 case R_PPC_EMB_RELSDA:
3712 case R_PPC_EMB_NADDR32:
3713 case R_PPC_EMB_NADDR16:
3714 case R_PPC_EMB_NADDR16_LO:
3715 case R_PPC_EMB_NADDR16_HI:
3716 case R_PPC_EMB_NADDR16_HA:
3717 if (info->shared)
3718 {
3719 bad_shared_reloc (abfd, r_type);
3720 return FALSE;
3721 }
3722 break;
3723
3724 case R_PPC_PLT32:
3725 case R_PPC_PLTREL24:
3726 case R_PPC_PLTREL32:
3727 case R_PPC_PLT16_LO:
3728 case R_PPC_PLT16_HI:
3729 case R_PPC_PLT16_HA:
3730 #ifdef DEBUG
3731 fprintf (stderr, "Reloc requires a PLT entry\n");
3732 #endif
3733 /* This symbol requires a procedure linkage table entry. We
3734 actually build the entry in finish_dynamic_symbol,
3735 because this might be a case of linking PIC code without
3736 linking in any dynamic objects, in which case we don't
3737 need to generate a procedure linkage table after all. */
3738
3739 if (h == NULL)
3740 {
3741 /* It does not make sense to have a procedure linkage
3742 table entry for a local symbol. */
3743 (*_bfd_error_handler) (_("%s(%s+0x%lx): %s reloc against "
3744 "local symbol"),
3745 bfd_archive_filename (abfd),
3746 sec->name,
3747 (long) rel->r_offset,
3748 ppc_elf_howto_table[r_type]->name);
3749 bfd_set_error (bfd_error_bad_value);
3750 return FALSE;
3751 }
3752
3753 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3754 h->plt.refcount++;
3755 break;
3756
3757 /* The following relocations don't need to propagate the
3758 relocation if linking a shared object since they are
3759 section relative. */
3760 case R_PPC_SECTOFF:
3761 case R_PPC_SECTOFF_LO:
3762 case R_PPC_SECTOFF_HI:
3763 case R_PPC_SECTOFF_HA:
3764 case R_PPC_DTPREL16:
3765 case R_PPC_DTPREL16_LO:
3766 case R_PPC_DTPREL16_HI:
3767 case R_PPC_DTPREL16_HA:
3768 case R_PPC_TOC16:
3769 break;
3770
3771 /* This are just markers. */
3772 case R_PPC_TLS:
3773 case R_PPC_EMB_MRKREF:
3774 case R_PPC_NONE:
3775 case R_PPC_max:
3776 break;
3777
3778 /* These should only appear in dynamic objects. */
3779 case R_PPC_COPY:
3780 case R_PPC_GLOB_DAT:
3781 case R_PPC_JMP_SLOT:
3782 case R_PPC_RELATIVE:
3783 break;
3784
3785 /* These aren't handled yet. We'll report an error later. */
3786 case R_PPC_ADDR30:
3787 case R_PPC_EMB_RELSEC16:
3788 case R_PPC_EMB_RELST_LO:
3789 case R_PPC_EMB_RELST_HI:
3790 case R_PPC_EMB_RELST_HA:
3791 case R_PPC_EMB_BIT_FLD:
3792 break;
3793
3794 /* This refers only to functions defined in the shared library. */
3795 case R_PPC_LOCAL24PC:
3796 break;
3797
3798 /* This relocation describes the C++ object vtable hierarchy.
3799 Reconstruct it for later use during GC. */
3800 case R_PPC_GNU_VTINHERIT:
3801 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3802 return FALSE;
3803 break;
3804
3805 /* This relocation describes which C++ vtable entries are actually
3806 used. Record for later use during GC. */
3807 case R_PPC_GNU_VTENTRY:
3808 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3809 return FALSE;
3810 break;
3811
3812 /* We shouldn't really be seeing these. */
3813 case R_PPC_TPREL32:
3814 if (info->shared)
3815 info->flags |= DF_STATIC_TLS;
3816 goto dodyn;
3817
3818 /* Nor these. */
3819 case R_PPC_DTPMOD32:
3820 case R_PPC_DTPREL32:
3821 goto dodyn;
3822
3823 case R_PPC_TPREL16:
3824 case R_PPC_TPREL16_LO:
3825 case R_PPC_TPREL16_HI:
3826 case R_PPC_TPREL16_HA:
3827 if (info->shared)
3828 info->flags |= DF_STATIC_TLS;
3829 goto dodyn;
3830
3831 /* When creating a shared object, we must copy these
3832 relocs into the output file. We create a reloc
3833 section in dynobj and make room for the reloc. */
3834 case R_PPC_REL24:
3835 case R_PPC_REL14:
3836 case R_PPC_REL14_BRTAKEN:
3837 case R_PPC_REL14_BRNTAKEN:
3838 case R_PPC_REL32:
3839 if (h == NULL
3840 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3841 break;
3842 /* fall through */
3843
3844 case R_PPC_ADDR32:
3845 case R_PPC_ADDR24:
3846 case R_PPC_ADDR16:
3847 case R_PPC_ADDR16_LO:
3848 case R_PPC_ADDR16_HI:
3849 case R_PPC_ADDR16_HA:
3850 case R_PPC_ADDR14:
3851 case R_PPC_ADDR14_BRTAKEN:
3852 case R_PPC_ADDR14_BRNTAKEN:
3853 case R_PPC_UADDR32:
3854 case R_PPC_UADDR16:
3855 if (h != NULL && !info->shared)
3856 {
3857 /* We may need a plt entry if the symbol turns out to be
3858 a function defined in a dynamic object. */
3859 h->plt.refcount++;
3860
3861 /* We may need a copy reloc too. */
3862 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3863 }
3864
3865 dodyn:
3866 /* If we are creating a shared library, and this is a reloc
3867 against a global symbol, or a non PC relative reloc
3868 against a local symbol, then we need to copy the reloc
3869 into the shared library. However, if we are linking with
3870 -Bsymbolic, we do not need to copy a reloc against a
3871 global symbol which is defined in an object we are
3872 including in the link (i.e., DEF_REGULAR is set). At
3873 this point we have not seen all the input files, so it is
3874 possible that DEF_REGULAR is not set now but will be set
3875 later (it is never cleared). In case of a weak definition,
3876 DEF_REGULAR may be cleared later by a strong definition in
3877 a shared library. We account for that possibility below by
3878 storing information in the dyn_relocs field of the hash
3879 table entry. A similar situation occurs when creating
3880 shared libraries and symbol visibility changes render the
3881 symbol local.
3882
3883 If on the other hand, we are creating an executable, we
3884 may need to keep relocations for symbols satisfied by a
3885 dynamic library if we manage to avoid copy relocs for the
3886 symbol. */
3887 if ((info->shared
3888 && (MUST_BE_DYN_RELOC (r_type)
3889 || (h != NULL
3890 && (! info->symbolic
3891 || h->root.type == bfd_link_hash_defweak
3892 || (h->elf_link_hash_flags
3893 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3894 || (ELIMINATE_COPY_RELOCS
3895 && !info->shared
3896 && (sec->flags & SEC_ALLOC) != 0
3897 && h != NULL
3898 && (h->root.type == bfd_link_hash_defweak
3899 || (h->elf_link_hash_flags
3900 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3901 {
3902 struct ppc_elf_dyn_relocs *p;
3903 struct ppc_elf_dyn_relocs **head;
3904
3905 #ifdef DEBUG
3906 fprintf (stderr,
3907 "ppc_elf_check_relocs needs to "
3908 "create relocation for %s\n",
3909 (h && h->root.root.string
3910 ? h->root.root.string : "<unknown>"));
3911 #endif
3912 if (sreloc == NULL)
3913 {
3914 const char *name;
3915
3916 name = (bfd_elf_string_from_elf_section
3917 (abfd,
3918 elf_elfheader (abfd)->e_shstrndx,
3919 elf_section_data (sec)->rel_hdr.sh_name));
3920 if (name == NULL)
3921 return FALSE;
3922
3923 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3924 && strcmp (bfd_get_section_name (abfd, sec),
3925 name + 5) == 0);
3926
3927 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3928 if (sreloc == NULL)
3929 {
3930 flagword flags;
3931
3932 sreloc = bfd_make_section (htab->elf.dynobj, name);
3933 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3934 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3935 if ((sec->flags & SEC_ALLOC) != 0)
3936 flags |= SEC_ALLOC | SEC_LOAD;
3937 if (sreloc == NULL
3938 || ! bfd_set_section_flags (htab->elf.dynobj,
3939 sreloc, flags)
3940 || ! bfd_set_section_alignment (htab->elf.dynobj,
3941 sreloc, 2))
3942 return FALSE;
3943 }
3944 elf_section_data (sec)->sreloc = sreloc;
3945 }
3946
3947 /* If this is a global symbol, we count the number of
3948 relocations we need for this symbol. */
3949 if (h != NULL)
3950 {
3951 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3952 }
3953 else
3954 {
3955 /* Track dynamic relocs needed for local syms too.
3956 We really need local syms available to do this
3957 easily. Oh well. */
3958
3959 asection *s;
3960 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3961 sec, r_symndx);
3962 if (s == NULL)
3963 return FALSE;
3964
3965 head = ((struct ppc_elf_dyn_relocs **)
3966 &elf_section_data (s)->local_dynrel);
3967 }
3968
3969 p = *head;
3970 if (p == NULL || p->sec != sec)
3971 {
3972 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3973 if (p == NULL)
3974 return FALSE;
3975 p->next = *head;
3976 *head = p;
3977 p->sec = sec;
3978 p->count = 0;
3979 p->pc_count = 0;
3980 }
3981
3982 p->count += 1;
3983 if (!MUST_BE_DYN_RELOC (r_type))
3984 p->pc_count += 1;
3985 }
3986
3987 break;
3988 }
3989 }
3990
3991 return TRUE;
3992 }
3993
3994 /* Return the section that should be marked against GC for a given
3995 relocation. */
3996
3997 static asection *
3998 ppc_elf_gc_mark_hook (asection *sec,
3999 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4000 Elf_Internal_Rela *rel,
4001 struct elf_link_hash_entry *h,
4002 Elf_Internal_Sym *sym)
4003 {
4004 if (h != NULL)
4005 {
4006 switch (ELF32_R_TYPE (rel->r_info))
4007 {
4008 case R_PPC_GNU_VTINHERIT:
4009 case R_PPC_GNU_VTENTRY:
4010 break;
4011
4012 default:
4013 switch (h->root.type)
4014 {
4015 case bfd_link_hash_defined:
4016 case bfd_link_hash_defweak:
4017 return h->root.u.def.section;
4018
4019 case bfd_link_hash_common:
4020 return h->root.u.c.p->section;
4021
4022 default:
4023 break;
4024 }
4025 }
4026 }
4027 else
4028 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4029
4030 return NULL;
4031 }
4032
4033 /* Update the got, plt and dynamic reloc reference counts for the
4034 section being removed. */
4035
4036 static bfd_boolean
4037 ppc_elf_gc_sweep_hook (bfd *abfd,
4038 struct bfd_link_info *info,
4039 asection *sec,
4040 const Elf_Internal_Rela *relocs)
4041 {
4042 struct ppc_elf_link_hash_table *htab;
4043 Elf_Internal_Shdr *symtab_hdr;
4044 struct elf_link_hash_entry **sym_hashes;
4045 bfd_signed_vma *local_got_refcounts;
4046 const Elf_Internal_Rela *rel, *relend;
4047
4048 elf_section_data (sec)->local_dynrel = NULL;
4049
4050 htab = ppc_elf_hash_table (info);
4051 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4052 sym_hashes = elf_sym_hashes (abfd);
4053 local_got_refcounts = elf_local_got_refcounts (abfd);
4054
4055 relend = relocs + sec->reloc_count;
4056 for (rel = relocs; rel < relend; rel++)
4057 {
4058 unsigned long r_symndx;
4059 enum elf_ppc_reloc_type r_type;
4060 struct elf_link_hash_entry *h = NULL;
4061
4062 r_symndx = ELF32_R_SYM (rel->r_info);
4063 if (r_symndx >= symtab_hdr->sh_info)
4064 {
4065 struct ppc_elf_dyn_relocs **pp, *p;
4066 struct ppc_elf_link_hash_entry *eh;
4067
4068 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4069 eh = (struct ppc_elf_link_hash_entry *) h;
4070
4071 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4072 if (p->sec == sec)
4073 {
4074 /* Everything must go for SEC. */
4075 *pp = p->next;
4076 break;
4077 }
4078 }
4079
4080 r_type = ELF32_R_TYPE (rel->r_info);
4081 switch (r_type)
4082 {
4083 case R_PPC_GOT_TLSLD16:
4084 case R_PPC_GOT_TLSLD16_LO:
4085 case R_PPC_GOT_TLSLD16_HI:
4086 case R_PPC_GOT_TLSLD16_HA:
4087 htab->tlsld_got.refcount -= 1;
4088 /* Fall thru */
4089
4090 case R_PPC_GOT_TLSGD16:
4091 case R_PPC_GOT_TLSGD16_LO:
4092 case R_PPC_GOT_TLSGD16_HI:
4093 case R_PPC_GOT_TLSGD16_HA:
4094 case R_PPC_GOT_TPREL16:
4095 case R_PPC_GOT_TPREL16_LO:
4096 case R_PPC_GOT_TPREL16_HI:
4097 case R_PPC_GOT_TPREL16_HA:
4098 case R_PPC_GOT_DTPREL16:
4099 case R_PPC_GOT_DTPREL16_LO:
4100 case R_PPC_GOT_DTPREL16_HI:
4101 case R_PPC_GOT_DTPREL16_HA:
4102 case R_PPC_GOT16:
4103 case R_PPC_GOT16_LO:
4104 case R_PPC_GOT16_HI:
4105 case R_PPC_GOT16_HA:
4106 if (h != NULL)
4107 {
4108 if (h->got.refcount > 0)
4109 h->got.refcount--;
4110 }
4111 else if (local_got_refcounts != NULL)
4112 {
4113 if (local_got_refcounts[r_symndx] > 0)
4114 local_got_refcounts[r_symndx]--;
4115 }
4116 break;
4117
4118 case R_PPC_REL24:
4119 case R_PPC_REL14:
4120 case R_PPC_REL14_BRTAKEN:
4121 case R_PPC_REL14_BRNTAKEN:
4122 case R_PPC_REL32:
4123 if (h == NULL
4124 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4125 break;
4126 /* Fall thru */
4127
4128 case R_PPC_ADDR32:
4129 case R_PPC_ADDR24:
4130 case R_PPC_ADDR16:
4131 case R_PPC_ADDR16_LO:
4132 case R_PPC_ADDR16_HI:
4133 case R_PPC_ADDR16_HA:
4134 case R_PPC_ADDR14:
4135 case R_PPC_ADDR14_BRTAKEN:
4136 case R_PPC_ADDR14_BRNTAKEN:
4137 case R_PPC_UADDR32:
4138 case R_PPC_UADDR16:
4139 case R_PPC_PLT32:
4140 case R_PPC_PLTREL24:
4141 case R_PPC_PLT16_LO:
4142 case R_PPC_PLT16_HI:
4143 case R_PPC_PLT16_HA:
4144 if (h != NULL)
4145 {
4146 if (h->plt.refcount > 0)
4147 h->plt.refcount--;
4148 }
4149 break;
4150
4151 default:
4152 break;
4153 }
4154 }
4155 return TRUE;
4156 }
4157
4158 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4159
4160 asection *
4161 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4162 {
4163 struct ppc_elf_link_hash_table *htab;
4164
4165 htab = ppc_elf_hash_table (info);
4166 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4167 FALSE, FALSE, TRUE);
4168
4169 return _bfd_elf_tls_setup (obfd, info);
4170 }
4171
4172 /* Run through all the TLS relocs looking for optimization
4173 opportunities. */
4174
4175 bfd_boolean
4176 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4177 struct bfd_link_info *info)
4178 {
4179 bfd *ibfd;
4180 asection *sec;
4181 struct ppc_elf_link_hash_table *htab;
4182
4183 if (info->relocatable || info->shared)
4184 return TRUE;
4185
4186 htab = ppc_elf_hash_table (info);
4187 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4188 {
4189 Elf_Internal_Sym *locsyms = NULL;
4190 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4191
4192 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4193 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4194 {
4195 Elf_Internal_Rela *relstart, *rel, *relend;
4196 int expecting_tls_get_addr;
4197
4198 /* Read the relocations. */
4199 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4200 info->keep_memory);
4201 if (relstart == NULL)
4202 return FALSE;
4203
4204 expecting_tls_get_addr = 0;
4205 relend = relstart + sec->reloc_count;
4206 for (rel = relstart; rel < relend; rel++)
4207 {
4208 enum elf_ppc_reloc_type r_type;
4209 unsigned long r_symndx;
4210 struct elf_link_hash_entry *h = NULL;
4211 char *tls_mask;
4212 char tls_set, tls_clear;
4213 bfd_boolean is_local;
4214
4215 r_symndx = ELF32_R_SYM (rel->r_info);
4216 if (r_symndx >= symtab_hdr->sh_info)
4217 {
4218 struct elf_link_hash_entry **sym_hashes;
4219
4220 sym_hashes = elf_sym_hashes (ibfd);
4221 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4222 while (h->root.type == bfd_link_hash_indirect
4223 || h->root.type == bfd_link_hash_warning)
4224 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4225 }
4226
4227 is_local = FALSE;
4228 if (h == NULL
4229 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
4230 is_local = TRUE;
4231
4232 r_type = ELF32_R_TYPE (rel->r_info);
4233 switch (r_type)
4234 {
4235 case R_PPC_GOT_TLSLD16:
4236 case R_PPC_GOT_TLSLD16_LO:
4237 case R_PPC_GOT_TLSLD16_HI:
4238 case R_PPC_GOT_TLSLD16_HA:
4239 /* These relocs should never be against a symbol
4240 defined in a shared lib. Leave them alone if
4241 that turns out to be the case. */
4242 expecting_tls_get_addr = 0;
4243 htab->tlsld_got.refcount -= 1;
4244 if (!is_local)
4245 continue;
4246
4247 /* LD -> LE */
4248 tls_set = 0;
4249 tls_clear = TLS_LD;
4250 expecting_tls_get_addr = 1;
4251 break;
4252
4253 case R_PPC_GOT_TLSGD16:
4254 case R_PPC_GOT_TLSGD16_LO:
4255 case R_PPC_GOT_TLSGD16_HI:
4256 case R_PPC_GOT_TLSGD16_HA:
4257 if (is_local)
4258 /* GD -> LE */
4259 tls_set = 0;
4260 else
4261 /* GD -> IE */
4262 tls_set = TLS_TLS | TLS_TPRELGD;
4263 tls_clear = TLS_GD;
4264 expecting_tls_get_addr = 1;
4265 break;
4266
4267 case R_PPC_GOT_TPREL16:
4268 case R_PPC_GOT_TPREL16_LO:
4269 case R_PPC_GOT_TPREL16_HI:
4270 case R_PPC_GOT_TPREL16_HA:
4271 expecting_tls_get_addr = 0;
4272 if (is_local)
4273 {
4274 /* IE -> LE */
4275 tls_set = 0;
4276 tls_clear = TLS_TPREL;
4277 break;
4278 }
4279 else
4280 continue;
4281
4282 case R_PPC_REL14:
4283 case R_PPC_REL14_BRTAKEN:
4284 case R_PPC_REL14_BRNTAKEN:
4285 case R_PPC_REL24:
4286 if (expecting_tls_get_addr
4287 && h != NULL
4288 && h == htab->tls_get_addr)
4289 {
4290 if (h->plt.refcount > 0)
4291 h->plt.refcount -= 1;
4292 }
4293 expecting_tls_get_addr = 0;
4294 continue;
4295
4296 default:
4297 expecting_tls_get_addr = 0;
4298 continue;
4299 }
4300
4301 if (h != NULL)
4302 {
4303 if (tls_set == 0)
4304 {
4305 /* We managed to get rid of a got entry. */
4306 if (h->got.refcount > 0)
4307 h->got.refcount -= 1;
4308 }
4309 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4310 }
4311 else
4312 {
4313 Elf_Internal_Sym *sym;
4314 bfd_signed_vma *lgot_refs;
4315 char *lgot_masks;
4316
4317 if (locsyms == NULL)
4318 {
4319 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4320 if (locsyms == NULL)
4321 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4322 symtab_hdr->sh_info,
4323 0, NULL, NULL, NULL);
4324 if (locsyms == NULL)
4325 {
4326 if (elf_section_data (sec)->relocs != relstart)
4327 free (relstart);
4328 return FALSE;
4329 }
4330 }
4331 sym = locsyms + r_symndx;
4332 lgot_refs = elf_local_got_refcounts (ibfd);
4333 if (lgot_refs == NULL)
4334 abort ();
4335 if (tls_set == 0)
4336 {
4337 /* We managed to get rid of a got entry. */
4338 if (lgot_refs[r_symndx] > 0)
4339 lgot_refs[r_symndx] -= 1;
4340 }
4341 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4342 tls_mask = &lgot_masks[r_symndx];
4343 }
4344
4345 *tls_mask |= tls_set;
4346 *tls_mask &= ~tls_clear;
4347 }
4348
4349 if (elf_section_data (sec)->relocs != relstart)
4350 free (relstart);
4351 }
4352
4353 if (locsyms != NULL
4354 && (symtab_hdr->contents != (unsigned char *) locsyms))
4355 {
4356 if (!info->keep_memory)
4357 free (locsyms);
4358 else
4359 symtab_hdr->contents = (unsigned char *) locsyms;
4360 }
4361 }
4362 return TRUE;
4363 }
4364 \f
4365 /* Hook called by the linker routine which adds symbols from an object
4366 file. We use it to put .comm items in .sbss, and not .bss. */
4367
4368 static bfd_boolean
4369 ppc_elf_add_symbol_hook (bfd *abfd,
4370 struct bfd_link_info *info,
4371 const Elf_Internal_Sym *sym,
4372 const char **namep ATTRIBUTE_UNUSED,
4373 flagword *flagsp ATTRIBUTE_UNUSED,
4374 asection **secp,
4375 bfd_vma *valp)
4376 {
4377 if (sym->st_shndx == SHN_COMMON
4378 && !info->relocatable
4379 && sym->st_size <= elf_gp_size (abfd)
4380 && (info->hash->creator == abfd->xvec
4381 || info->hash->creator == abfd->xvec->alternative_target))
4382 {
4383 /* Common symbols less than or equal to -G nn bytes are automatically
4384 put into .sbss. */
4385 struct ppc_elf_link_hash_table *htab;
4386
4387 htab = ppc_elf_hash_table (info);
4388 if (htab->sbss == NULL)
4389 {
4390 flagword flags = SEC_IS_COMMON;
4391
4392 htab->sbss = bfd_make_section_anyway (abfd, ".sbss");
4393 if (htab->sbss == NULL
4394 || ! bfd_set_section_flags (abfd, htab->sbss, flags))
4395 return FALSE;
4396 }
4397
4398 *secp = htab->sbss;
4399 *valp = sym->st_size;
4400 }
4401
4402 return TRUE;
4403 }
4404 \f
4405 /* Finish up dynamic symbol handling. We set the contents of various
4406 dynamic sections here. */
4407
4408 static bfd_boolean
4409 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
4410 struct bfd_link_info *info,
4411 struct elf_link_hash_entry *h,
4412 Elf_Internal_Sym *sym)
4413 {
4414 struct ppc_elf_link_hash_table *htab;
4415
4416 #ifdef DEBUG
4417 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
4418 h->root.root.string);
4419 #endif
4420
4421 htab = ppc_elf_hash_table (info);
4422 BFD_ASSERT (htab->elf.dynobj != NULL);
4423
4424 if (h->plt.offset != (bfd_vma) -1)
4425 {
4426 Elf_Internal_Rela rela;
4427 bfd_byte *loc;
4428 bfd_vma reloc_index;
4429
4430 #ifdef DEBUG
4431 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
4432 #endif
4433
4434 /* This symbol has an entry in the procedure linkage table. Set
4435 it up. */
4436
4437 BFD_ASSERT (h->dynindx != -1);
4438 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
4439
4440 /* We don't need to fill in the .plt. The ppc dynamic linker
4441 will fill it in. */
4442
4443 /* Fill in the entry in the .rela.plt section. */
4444 rela.r_offset = (htab->plt->output_section->vma
4445 + htab->plt->output_offset
4446 + h->plt.offset);
4447 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
4448 rela.r_addend = 0;
4449
4450 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
4451 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
4452 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
4453 loc = (htab->relplt->contents
4454 + reloc_index * sizeof (Elf32_External_Rela));
4455 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4456
4457 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4458 {
4459 /* Mark the symbol as undefined, rather than as defined in
4460 the .plt section. Leave the value alone. */
4461 sym->st_shndx = SHN_UNDEF;
4462 /* If the symbol is weak, we do need to clear the value.
4463 Otherwise, the PLT entry would provide a definition for
4464 the symbol even if the symbol wasn't defined anywhere,
4465 and so the symbol would never be NULL. */
4466 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
4467 == 0)
4468 sym->st_value = 0;
4469 }
4470 }
4471
4472 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4473 {
4474 asection *s;
4475 Elf_Internal_Rela rela;
4476 bfd_byte *loc;
4477
4478 /* This symbols needs a copy reloc. Set it up. */
4479
4480 #ifdef DEBUG
4481 fprintf (stderr, ", copy");
4482 #endif
4483
4484 BFD_ASSERT (h->dynindx != -1);
4485
4486 if (h->size <= elf_gp_size (htab->elf.dynobj))
4487 s = htab->relsbss;
4488 else
4489 s = htab->relbss;
4490 BFD_ASSERT (s != NULL);
4491
4492 rela.r_offset = (h->root.u.def.value
4493 + h->root.u.def.section->output_section->vma
4494 + h->root.u.def.section->output_offset);
4495 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
4496 rela.r_addend = 0;
4497 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4498 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4499 }
4500
4501 #ifdef DEBUG
4502 fprintf (stderr, "\n");
4503 #endif
4504
4505 /* Mark some specially defined symbols as absolute. */
4506 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4507 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
4508 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
4509 sym->st_shndx = SHN_ABS;
4510
4511 return TRUE;
4512 }
4513 \f
4514 /* Finish up the dynamic sections. */
4515
4516 static bfd_boolean
4517 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
4518 struct bfd_link_info *info)
4519 {
4520 asection *sdyn;
4521 struct ppc_elf_link_hash_table *htab;
4522
4523 #ifdef DEBUG
4524 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
4525 #endif
4526
4527 htab = ppc_elf_hash_table (info);
4528 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
4529
4530 if (htab->elf.dynamic_sections_created)
4531 {
4532 Elf32_External_Dyn *dyncon, *dynconend;
4533
4534 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
4535
4536 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4537 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4538 for (; dyncon < dynconend; dyncon++)
4539 {
4540 Elf_Internal_Dyn dyn;
4541 asection *s;
4542
4543 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
4544
4545 switch (dyn.d_tag)
4546 {
4547 case DT_PLTGOT:
4548 s = htab->plt;
4549 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4550 break;
4551
4552 case DT_PLTRELSZ:
4553 dyn.d_un.d_val = htab->relplt->_raw_size;
4554 break;
4555
4556 case DT_JMPREL:
4557 s = htab->relplt;
4558 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4559 break;
4560
4561 default:
4562 continue;
4563 }
4564
4565 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4566 }
4567 }
4568
4569 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
4570 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
4571 if (htab->got)
4572 {
4573 unsigned char *contents = htab->got->contents;
4574 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
4575
4576 if (sdyn == NULL)
4577 bfd_put_32 (output_bfd, 0, contents + 4);
4578 else
4579 bfd_put_32 (output_bfd,
4580 sdyn->output_section->vma + sdyn->output_offset,
4581 contents + 4);
4582
4583 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
4584 }
4585
4586 return TRUE;
4587 }
4588 \f
4589 /* The RELOCATE_SECTION function is called by the ELF backend linker
4590 to handle the relocations for a section.
4591
4592 The relocs are always passed as Rela structures; if the section
4593 actually uses Rel structures, the r_addend field will always be
4594 zero.
4595
4596 This function is responsible for adjust the section contents as
4597 necessary, and (if using Rela relocs and generating a
4598 relocatable output file) adjusting the reloc addend as
4599 necessary.
4600
4601 This function does not have to worry about setting the reloc
4602 address or the reloc symbol index.
4603
4604 LOCAL_SYMS is a pointer to the swapped in local symbols.
4605
4606 LOCAL_SECTIONS is an array giving the section in the input file
4607 corresponding to the st_shndx field of each local symbol.
4608
4609 The global hash table entry for the global symbols can be found
4610 via elf_sym_hashes (input_bfd).
4611
4612 When generating relocatable output, this function must handle
4613 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
4614 going to be the section symbol corresponding to the output
4615 section, which means that the addend must be adjusted
4616 accordingly. */
4617
4618 static bfd_boolean
4619 ppc_elf_relocate_section (bfd *output_bfd,
4620 struct bfd_link_info *info,
4621 bfd *input_bfd,
4622 asection *input_section,
4623 bfd_byte *contents,
4624 Elf_Internal_Rela *relocs,
4625 Elf_Internal_Sym *local_syms,
4626 asection **local_sections)
4627 {
4628 Elf_Internal_Shdr *symtab_hdr;
4629 struct elf_link_hash_entry **sym_hashes;
4630 struct ppc_elf_link_hash_table *htab;
4631 Elf_Internal_Rela *rel;
4632 Elf_Internal_Rela *relend;
4633 Elf_Internal_Rela outrel;
4634 bfd_byte *loc;
4635 asection *sreloc = NULL;
4636 bfd_vma *local_got_offsets;
4637 bfd_boolean ret = TRUE;
4638
4639 #ifdef DEBUG
4640 fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, "
4641 "%ld relocations%s\n",
4642 bfd_archive_filename (input_bfd),
4643 bfd_section_name(input_bfd, input_section),
4644 (long) input_section->reloc_count,
4645 (info->relocatable) ? " (relocatable)" : "");
4646 #endif
4647
4648 if (info->relocatable)
4649 return TRUE;
4650
4651 /* Initialize howto table if not already done. */
4652 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4653 ppc_elf_howto_init ();
4654
4655 htab = ppc_elf_hash_table (info);
4656 local_got_offsets = elf_local_got_offsets (input_bfd);
4657 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4658 sym_hashes = elf_sym_hashes (input_bfd);
4659 rel = relocs;
4660 relend = relocs + input_section->reloc_count;
4661 for (; rel < relend; rel++)
4662 {
4663 enum elf_ppc_reloc_type r_type;
4664 bfd_vma addend;
4665 bfd_reloc_status_type r;
4666 Elf_Internal_Sym *sym;
4667 asection *sec;
4668 struct elf_link_hash_entry *h;
4669 const char *sym_name;
4670 reloc_howto_type *howto;
4671 unsigned long r_symndx;
4672 bfd_vma relocation;
4673 bfd_vma branch_bit, insn, from;
4674 bfd_boolean unresolved_reloc;
4675 bfd_boolean warned;
4676 unsigned int tls_type, tls_mask, tls_gd;
4677
4678 r_type = ELF32_R_TYPE (rel->r_info);
4679 sym = NULL;
4680 sec = NULL;
4681 h = NULL;
4682 unresolved_reloc = FALSE;
4683 warned = FALSE;
4684 r_symndx = ELF32_R_SYM (rel->r_info);
4685
4686 if (r_symndx < symtab_hdr->sh_info)
4687 {
4688 sym = local_syms + r_symndx;
4689 sec = local_sections[r_symndx];
4690 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
4691
4692 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4693 }
4694 else
4695 {
4696 RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
4697 symtab_hdr, relocation, sec,
4698 unresolved_reloc, info,
4699 warned);
4700
4701 sym_name = h->root.root.string;
4702 }
4703
4704 /* TLS optimizations. Replace instruction sequences and relocs
4705 based on information we collected in tls_optimize. We edit
4706 RELOCS so that --emit-relocs will output something sensible
4707 for the final instruction stream. */
4708 tls_mask = 0;
4709 tls_gd = 0;
4710 if (IS_PPC_TLS_RELOC (r_type))
4711 {
4712 if (h != NULL)
4713 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
4714 else if (local_got_offsets != NULL)
4715 {
4716 char *lgot_masks;
4717 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
4718 tls_mask = lgot_masks[r_symndx];
4719 }
4720 }
4721
4722 /* Ensure reloc mapping code below stays sane. */
4723 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
4724 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
4725 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
4726 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
4727 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
4728 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
4729 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
4730 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
4731 abort ();
4732 switch (r_type)
4733 {
4734 default:
4735 break;
4736
4737 case R_PPC_GOT_TPREL16:
4738 case R_PPC_GOT_TPREL16_LO:
4739 if (tls_mask != 0
4740 && (tls_mask & TLS_TPREL) == 0)
4741 {
4742 bfd_vma insn;
4743 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
4744 insn &= 31 << 21;
4745 insn |= 0x3c020000; /* addis 0,2,0 */
4746 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
4747 r_type = R_PPC_TPREL16_HA;
4748 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4749 }
4750 break;
4751
4752 case R_PPC_TLS:
4753 if (tls_mask != 0
4754 && (tls_mask & TLS_TPREL) == 0)
4755 {
4756 bfd_vma insn, rtra;
4757 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4758 if ((insn & ((31 << 26) | (31 << 11)))
4759 == ((31 << 26) | (2 << 11)))
4760 rtra = insn & ((1 << 26) - (1 << 16));
4761 else if ((insn & ((31 << 26) | (31 << 16)))
4762 == ((31 << 26) | (2 << 16)))
4763 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
4764 else
4765 abort ();
4766 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
4767 /* add -> addi. */
4768 insn = 14 << 26;
4769 else if ((insn & (31 << 1)) == 23 << 1
4770 && ((insn & (31 << 6)) < 14 << 6
4771 || ((insn & (31 << 6)) >= 16 << 6
4772 && (insn & (31 << 6)) < 24 << 6)))
4773 /* load and store indexed -> dform. */
4774 insn = (32 | ((insn >> 6) & 31)) << 26;
4775 else if ((insn & (31 << 1)) == 21 << 1
4776 && (insn & (0x1a << 6)) == 0)
4777 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
4778 insn = (((58 | ((insn >> 6) & 4)) << 26)
4779 | ((insn >> 6) & 1));
4780 else if ((insn & (31 << 1)) == 21 << 1
4781 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
4782 /* lwax -> lwa. */
4783 insn = (58 << 26) | 2;
4784 else
4785 abort ();
4786 insn |= rtra;
4787 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4788 r_type = R_PPC_TPREL16_LO;
4789 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4790 /* Was PPC_TLS which sits on insn boundary, now
4791 PPC_TPREL16_LO which is at insn+2. */
4792 rel->r_offset += 2;
4793 }
4794 break;
4795
4796 case R_PPC_GOT_TLSGD16_HI:
4797 case R_PPC_GOT_TLSGD16_HA:
4798 tls_gd = TLS_TPRELGD;
4799 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4800 goto tls_gdld_hi;
4801 break;
4802
4803 case R_PPC_GOT_TLSLD16_HI:
4804 case R_PPC_GOT_TLSLD16_HA:
4805 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4806 {
4807 tls_gdld_hi:
4808 if ((tls_mask & tls_gd) != 0)
4809 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4810 + R_PPC_GOT_TPREL16);
4811 else
4812 {
4813 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
4814 rel->r_offset -= 2;
4815 r_type = R_PPC_NONE;
4816 }
4817 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4818 }
4819 break;
4820
4821 case R_PPC_GOT_TLSGD16:
4822 case R_PPC_GOT_TLSGD16_LO:
4823 tls_gd = TLS_TPRELGD;
4824 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4825 goto tls_get_addr_check;
4826 break;
4827
4828 case R_PPC_GOT_TLSLD16:
4829 case R_PPC_GOT_TLSLD16_LO:
4830 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4831 {
4832 tls_get_addr_check:
4833 if (rel + 1 < relend)
4834 {
4835 enum elf_ppc_reloc_type r_type2;
4836 unsigned long r_symndx2;
4837 struct elf_link_hash_entry *h2;
4838 bfd_vma insn1, insn2;
4839 bfd_vma offset;
4840
4841 /* The next instruction should be a call to
4842 __tls_get_addr. Peek at the reloc to be sure. */
4843 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4844 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4845 if (r_symndx2 < symtab_hdr->sh_info
4846 || (r_type2 != R_PPC_REL14
4847 && r_type2 != R_PPC_REL14_BRTAKEN
4848 && r_type2 != R_PPC_REL14_BRNTAKEN
4849 && r_type2 != R_PPC_REL24
4850 && r_type2 != R_PPC_PLTREL24))
4851 break;
4852
4853 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4854 while (h2->root.type == bfd_link_hash_indirect
4855 || h2->root.type == bfd_link_hash_warning)
4856 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
4857 if (h2 == NULL || h2 != htab->tls_get_addr)
4858 break;
4859
4860 /* OK, it checks out. Replace the call. */
4861 offset = rel[1].r_offset;
4862 insn1 = bfd_get_32 (output_bfd,
4863 contents + rel->r_offset - 2);
4864 if ((tls_mask & tls_gd) != 0)
4865 {
4866 /* IE */
4867 insn1 &= (1 << 26) - 1;
4868 insn1 |= 32 << 26; /* lwz */
4869 insn2 = 0x7c631214; /* add 3,3,2 */
4870 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
4871 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4872 + R_PPC_GOT_TPREL16);
4873 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4874 }
4875 else
4876 {
4877 /* LE */
4878 insn1 = 0x3c620000; /* addis 3,2,0 */
4879 insn2 = 0x38630000; /* addi 3,3,0 */
4880 if (tls_gd == 0)
4881 {
4882 /* Was an LD reloc. */
4883 r_symndx = 0;
4884 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4885 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4886 }
4887 r_type = R_PPC_TPREL16_HA;
4888 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4889 rel[1].r_info = ELF32_R_INFO (r_symndx,
4890 R_PPC_TPREL16_LO);
4891 rel[1].r_offset += 2;
4892 }
4893 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
4894 bfd_put_32 (output_bfd, insn2, contents + offset);
4895 if (tls_gd == 0)
4896 {
4897 /* We changed the symbol on an LD reloc. Start over
4898 in order to get h, sym, sec etc. right. */
4899 rel--;
4900 continue;
4901 }
4902 }
4903 }
4904 break;
4905 }
4906
4907 /* Handle other relocations that tweak non-addend part of insn. */
4908 branch_bit = 0;
4909 switch (r_type)
4910 {
4911 default:
4912 break;
4913
4914 /* Branch taken prediction relocations. */
4915 case R_PPC_ADDR14_BRTAKEN:
4916 case R_PPC_REL14_BRTAKEN:
4917 branch_bit = BRANCH_PREDICT_BIT;
4918 /* Fall thru */
4919
4920 /* Branch not taken predicition relocations. */
4921 case R_PPC_ADDR14_BRNTAKEN:
4922 case R_PPC_REL14_BRNTAKEN:
4923 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4924 insn &= ~BRANCH_PREDICT_BIT;
4925 insn |= branch_bit;
4926
4927 from = (rel->r_offset
4928 + input_section->output_offset
4929 + input_section->output_section->vma);
4930
4931 /* Invert 'y' bit if not the default. */
4932 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
4933 insn ^= BRANCH_PREDICT_BIT;
4934
4935 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4936 break;
4937 }
4938
4939 addend = rel->r_addend;
4940 tls_type = 0;
4941 howto = NULL;
4942 if (r_type < R_PPC_max)
4943 howto = ppc_elf_howto_table[r_type];
4944 switch (r_type)
4945 {
4946 default:
4947 (*_bfd_error_handler)
4948 (_("%s: unknown relocation type %d for symbol %s"),
4949 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
4950
4951 bfd_set_error (bfd_error_bad_value);
4952 ret = FALSE;
4953 continue;
4954
4955 case R_PPC_NONE:
4956 case R_PPC_TLS:
4957 case R_PPC_EMB_MRKREF:
4958 case R_PPC_GNU_VTINHERIT:
4959 case R_PPC_GNU_VTENTRY:
4960 continue;
4961
4962 /* GOT16 relocations. Like an ADDR16 using the symbol's
4963 address in the GOT as relocation value instead of the
4964 symbol's value itself. Also, create a GOT entry for the
4965 symbol and put the symbol value there. */
4966 case R_PPC_GOT_TLSGD16:
4967 case R_PPC_GOT_TLSGD16_LO:
4968 case R_PPC_GOT_TLSGD16_HI:
4969 case R_PPC_GOT_TLSGD16_HA:
4970 tls_type = TLS_TLS | TLS_GD;
4971 goto dogot;
4972
4973 case R_PPC_GOT_TLSLD16:
4974 case R_PPC_GOT_TLSLD16_LO:
4975 case R_PPC_GOT_TLSLD16_HI:
4976 case R_PPC_GOT_TLSLD16_HA:
4977 tls_type = TLS_TLS | TLS_LD;
4978 goto dogot;
4979
4980 case R_PPC_GOT_TPREL16:
4981 case R_PPC_GOT_TPREL16_LO:
4982 case R_PPC_GOT_TPREL16_HI:
4983 case R_PPC_GOT_TPREL16_HA:
4984 tls_type = TLS_TLS | TLS_TPREL;
4985 goto dogot;
4986
4987 case R_PPC_GOT_DTPREL16:
4988 case R_PPC_GOT_DTPREL16_LO:
4989 case R_PPC_GOT_DTPREL16_HI:
4990 case R_PPC_GOT_DTPREL16_HA:
4991 tls_type = TLS_TLS | TLS_DTPREL;
4992 goto dogot;
4993
4994 case R_PPC_GOT16:
4995 case R_PPC_GOT16_LO:
4996 case R_PPC_GOT16_HI:
4997 case R_PPC_GOT16_HA:
4998 dogot:
4999 {
5000 /* Relocation is to the entry for this symbol in the global
5001 offset table. */
5002 bfd_vma off;
5003 bfd_vma *offp;
5004 unsigned long indx;
5005
5006 if (htab->got == NULL)
5007 abort ();
5008
5009 indx = 0;
5010 if (tls_type == (TLS_TLS | TLS_LD)
5011 && (h == NULL
5012 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
5013 offp = &htab->tlsld_got.offset;
5014 else if (h != NULL)
5015 {
5016 bfd_boolean dyn;
5017 dyn = htab->elf.dynamic_sections_created;
5018 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5019 || (info->shared
5020 && SYMBOL_REFERENCES_LOCAL (info, h)))
5021 /* This is actually a static link, or it is a
5022 -Bsymbolic link and the symbol is defined
5023 locally, or the symbol was forced to be local
5024 because of a version file. */
5025 ;
5026 else
5027 {
5028 indx = h->dynindx;
5029 unresolved_reloc = FALSE;
5030 }
5031 offp = &h->got.offset;
5032 }
5033 else
5034 {
5035 if (local_got_offsets == NULL)
5036 abort ();
5037 offp = &local_got_offsets[r_symndx];
5038 }
5039
5040 /* The offset must always be a multiple of 4. We use the
5041 least significant bit to record whether we have already
5042 processed this entry. */
5043 off = *offp;
5044 if ((off & 1) != 0)
5045 off &= ~1;
5046 else
5047 {
5048 unsigned int tls_m = (tls_mask
5049 & (TLS_LD | TLS_GD | TLS_DTPREL
5050 | TLS_TPREL | TLS_TPRELGD));
5051
5052 if (offp == &htab->tlsld_got.offset)
5053 tls_m = TLS_LD;
5054 else if (h == NULL
5055 || !(h->elf_link_hash_flags
5056 & ELF_LINK_HASH_DEF_DYNAMIC))
5057 tls_m &= ~TLS_LD;
5058
5059 /* We might have multiple got entries for this sym.
5060 Initialize them all. */
5061 do
5062 {
5063 int tls_ty = 0;
5064
5065 if ((tls_m & TLS_LD) != 0)
5066 {
5067 tls_ty = TLS_TLS | TLS_LD;
5068 tls_m &= ~TLS_LD;
5069 }
5070 else if ((tls_m & TLS_GD) != 0)
5071 {
5072 tls_ty = TLS_TLS | TLS_GD;
5073 tls_m &= ~TLS_GD;
5074 }
5075 else if ((tls_m & TLS_DTPREL) != 0)
5076 {
5077 tls_ty = TLS_TLS | TLS_DTPREL;
5078 tls_m &= ~TLS_DTPREL;
5079 }
5080 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5081 {
5082 tls_ty = TLS_TLS | TLS_TPREL;
5083 tls_m = 0;
5084 }
5085
5086 /* Generate relocs for the dynamic linker. */
5087 if ((info->shared || indx != 0)
5088 && (h == NULL
5089 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5090 || h->root.type != bfd_link_hash_undefweak))
5091 {
5092 outrel.r_offset = (htab->got->output_section->vma
5093 + htab->got->output_offset
5094 + off);
5095 outrel.r_addend = 0;
5096 if (tls_ty & (TLS_LD | TLS_GD))
5097 {
5098 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5099 if (tls_ty == (TLS_TLS | TLS_GD))
5100 {
5101 loc = htab->relgot->contents;
5102 loc += (htab->relgot->reloc_count++
5103 * sizeof (Elf32_External_Rela));
5104 bfd_elf32_swap_reloca_out (output_bfd,
5105 &outrel, loc);
5106 outrel.r_offset += 4;
5107 outrel.r_info
5108 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5109 }
5110 }
5111 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5112 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5113 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5114 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5115 else if (indx == 0)
5116 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5117 else
5118 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5119 if (indx == 0)
5120 {
5121 outrel.r_addend += relocation;
5122 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5123 outrel.r_addend -= htab->elf.tls_sec->vma;
5124 }
5125 loc = htab->relgot->contents;
5126 loc += (htab->relgot->reloc_count++
5127 * sizeof (Elf32_External_Rela));
5128 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5129 }
5130
5131 /* Init the .got section contents if we're not
5132 emitting a reloc. */
5133 else
5134 {
5135 bfd_vma value = relocation;
5136
5137 if (tls_ty == (TLS_TLS | TLS_LD))
5138 value = 1;
5139 else if (tls_ty != 0)
5140 {
5141 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
5142 if (tls_ty == (TLS_TLS | TLS_TPREL))
5143 value += DTP_OFFSET - TP_OFFSET;
5144
5145 if (tls_ty == (TLS_TLS | TLS_GD))
5146 {
5147 bfd_put_32 (output_bfd, value,
5148 htab->got->contents + off + 4);
5149 value = 1;
5150 }
5151 }
5152 bfd_put_32 (output_bfd, value,
5153 htab->got->contents + off);
5154 }
5155
5156 off += 4;
5157 if (tls_ty & (TLS_LD | TLS_GD))
5158 off += 4;
5159 }
5160 while (tls_m != 0);
5161
5162 off = *offp;
5163 *offp = off | 1;
5164 }
5165
5166 if (off >= (bfd_vma) -2)
5167 abort ();
5168
5169 if ((tls_type & TLS_TLS) != 0)
5170 {
5171 if (tls_type != (TLS_TLS | TLS_LD))
5172 {
5173 if ((tls_mask & TLS_LD) != 0
5174 && !(h == NULL
5175 || !(h->elf_link_hash_flags
5176 & ELF_LINK_HASH_DEF_DYNAMIC)))
5177 off += 8;
5178 if (tls_type != (TLS_TLS | TLS_GD))
5179 {
5180 if ((tls_mask & TLS_GD) != 0)
5181 off += 8;
5182 if (tls_type != (TLS_TLS | TLS_DTPREL))
5183 {
5184 if ((tls_mask & TLS_DTPREL) != 0)
5185 off += 4;
5186 }
5187 }
5188 }
5189 }
5190
5191 relocation = htab->got->output_offset + off - 4;
5192
5193 /* Addends on got relocations don't make much sense.
5194 x+off@got is actually x@got+off, and since the got is
5195 generated by a hash table traversal, the value in the
5196 got at entry m+n bears little relation to the entry m. */
5197 if (addend != 0)
5198 (*_bfd_error_handler)
5199 (_("%s(%s+0x%lx): non-zero addend on %s reloc against `%s'"),
5200 bfd_archive_filename (input_bfd),
5201 bfd_get_section_name (input_bfd, input_section),
5202 (long) rel->r_offset,
5203 howto->name,
5204 sym_name);
5205 }
5206 break;
5207
5208 /* Relocations that need no special processing. */
5209 case R_PPC_LOCAL24PC:
5210 /* It makes no sense to point a local relocation
5211 at a symbol not in this object. */
5212 if (unresolved_reloc)
5213 {
5214 if (! (*info->callbacks->undefined_symbol) (info,
5215 h->root.root.string,
5216 input_bfd,
5217 input_section,
5218 rel->r_offset,
5219 TRUE))
5220 return FALSE;
5221 continue;
5222 }
5223 break;
5224
5225 case R_PPC_DTPREL16:
5226 case R_PPC_DTPREL16_LO:
5227 case R_PPC_DTPREL16_HI:
5228 case R_PPC_DTPREL16_HA:
5229 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5230 break;
5231
5232 /* Relocations that may need to be propagated if this is a shared
5233 object. */
5234 case R_PPC_TPREL16:
5235 case R_PPC_TPREL16_LO:
5236 case R_PPC_TPREL16_HI:
5237 case R_PPC_TPREL16_HA:
5238 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5239 /* The TPREL16 relocs shouldn't really be used in shared
5240 libs as they will result in DT_TEXTREL being set, but
5241 support them anyway. */
5242 goto dodyn;
5243
5244 case R_PPC_TPREL32:
5245 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5246 goto dodyn;
5247
5248 case R_PPC_DTPREL32:
5249 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5250 goto dodyn;
5251
5252 case R_PPC_DTPMOD32:
5253 relocation = 1;
5254 addend = 0;
5255 goto dodyn;
5256
5257 case R_PPC_REL24:
5258 case R_PPC_REL32:
5259 case R_PPC_REL14:
5260 case R_PPC_REL14_BRTAKEN:
5261 case R_PPC_REL14_BRNTAKEN:
5262 /* If these relocations are not to a named symbol, they can be
5263 handled right here, no need to bother the dynamic linker. */
5264 if (SYMBOL_REFERENCES_LOCAL (info, h)
5265 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5266 break;
5267 /* fall through */
5268
5269 /* Relocations that always need to be propagated if this is a shared
5270 object. */
5271 case R_PPC_ADDR32:
5272 case R_PPC_ADDR24:
5273 case R_PPC_ADDR16:
5274 case R_PPC_ADDR16_LO:
5275 case R_PPC_ADDR16_HI:
5276 case R_PPC_ADDR16_HA:
5277 case R_PPC_ADDR14:
5278 case R_PPC_ADDR14_BRTAKEN:
5279 case R_PPC_ADDR14_BRNTAKEN:
5280 case R_PPC_UADDR32:
5281 case R_PPC_UADDR16:
5282 /* r_symndx will be zero only for relocs against symbols
5283 from removed linkonce sections, or sections discarded by
5284 a linker script. */
5285 dodyn:
5286 if (r_symndx == 0)
5287 break;
5288 /* Fall thru. */
5289
5290 if ((info->shared
5291 && (h == NULL
5292 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5293 || h->root.type != bfd_link_hash_undefweak)
5294 && (MUST_BE_DYN_RELOC (r_type)
5295 || !SYMBOL_CALLS_LOCAL (info, h)))
5296 || (ELIMINATE_COPY_RELOCS
5297 && !info->shared
5298 && (input_section->flags & SEC_ALLOC) != 0
5299 && h != NULL
5300 && h->dynindx != -1
5301 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5302 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5303 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
5304 {
5305 int skip;
5306
5307 #ifdef DEBUG
5308 fprintf (stderr, "ppc_elf_relocate_section needs to "
5309 "create relocation for %s\n",
5310 (h && h->root.root.string
5311 ? h->root.root.string : "<unknown>"));
5312 #endif
5313
5314 /* When generating a shared object, these relocations
5315 are copied into the output file to be resolved at run
5316 time. */
5317 if (sreloc == NULL)
5318 {
5319 const char *name;
5320
5321 name = (bfd_elf_string_from_elf_section
5322 (input_bfd,
5323 elf_elfheader (input_bfd)->e_shstrndx,
5324 elf_section_data (input_section)->rel_hdr.sh_name));
5325 if (name == NULL)
5326 return FALSE;
5327
5328 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
5329 && strcmp (bfd_get_section_name (input_bfd,
5330 input_section),
5331 name + 5) == 0);
5332
5333 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
5334 BFD_ASSERT (sreloc != NULL);
5335 }
5336
5337 skip = 0;
5338
5339 outrel.r_offset =
5340 _bfd_elf_section_offset (output_bfd, info, input_section,
5341 rel->r_offset);
5342 if (outrel.r_offset == (bfd_vma) -1
5343 || outrel.r_offset == (bfd_vma) -2)
5344 skip = (int) outrel.r_offset;
5345 outrel.r_offset += (input_section->output_section->vma
5346 + input_section->output_offset);
5347
5348 if (skip)
5349 memset (&outrel, 0, sizeof outrel);
5350 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
5351 {
5352 unresolved_reloc = FALSE;
5353 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5354 outrel.r_addend = rel->r_addend;
5355 }
5356 else
5357 {
5358 outrel.r_addend = relocation + rel->r_addend;
5359
5360 if (r_type == R_PPC_ADDR32)
5361 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
5362 else
5363 {
5364 long indx;
5365
5366 if (bfd_is_abs_section (sec))
5367 indx = 0;
5368 else if (sec == NULL || sec->owner == NULL)
5369 {
5370 bfd_set_error (bfd_error_bad_value);
5371 return FALSE;
5372 }
5373 else
5374 {
5375 asection *osec;
5376
5377 /* We are turning this relocation into one
5378 against a section symbol. It would be
5379 proper to subtract the symbol's value,
5380 osec->vma, from the emitted reloc addend,
5381 but ld.so expects buggy relocs. */
5382 osec = sec->output_section;
5383 indx = elf_section_data (osec)->dynindx;
5384 BFD_ASSERT (indx > 0);
5385 #ifdef DEBUG
5386 if (indx <= 0)
5387 printf ("indx=%d section=%s flags=%08x name=%s\n",
5388 indx, osec->name, osec->flags,
5389 h->root.root.string);
5390 #endif
5391 }
5392
5393 outrel.r_info = ELF32_R_INFO (indx, r_type);
5394 }
5395 }
5396
5397 loc = sreloc->contents;
5398 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5399 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5400
5401 if (skip == -1)
5402 continue;
5403
5404 /* This reloc will be computed at runtime. We clear the memory
5405 so that it contains predictable value. */
5406 if (! skip
5407 && ((input_section->flags & SEC_ALLOC) != 0
5408 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
5409 {
5410 relocation = howto->pc_relative ? outrel.r_offset : 0;
5411 addend = 0;
5412 break;
5413 }
5414 }
5415 break;
5416
5417 case R_PPC_RELAX32PC:
5418 relocation -= (input_section->output_section->vma
5419 + input_section->output_offset
5420 + rel->r_offset - 4);
5421 /* Fall thru */
5422 case R_PPC_RELAX32:
5423 {
5424 unsigned long t0;
5425 unsigned long t1;
5426
5427 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
5428 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
5429
5430 /* We're clearing the bits for R_PPC_ADDR16_HA
5431 and R_PPC_ADDR16_LO here. */
5432 t0 &= ~0xffff;
5433 t1 &= ~0xffff;
5434
5435 /* t0 is HA, t1 is LO */
5436 relocation += addend;
5437 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
5438 t1 |= relocation & 0xffff;
5439
5440 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
5441 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
5442 }
5443 continue;
5444
5445 /* Indirect .sdata relocation. */
5446 case R_PPC_EMB_SDAI16:
5447 BFD_ASSERT (htab->sdata != NULL);
5448 relocation
5449 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5450 htab->sdata, h, relocation,
5451 rel, R_PPC_RELATIVE);
5452 break;
5453
5454 /* Indirect .sdata2 relocation. */
5455 case R_PPC_EMB_SDA2I16:
5456 BFD_ASSERT (htab->sdata2 != NULL);
5457 relocation
5458 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5459 htab->sdata2, h, relocation,
5460 rel, R_PPC_RELATIVE);
5461 break;
5462
5463 /* Handle the TOC16 reloc. We want to use the offset within the .got
5464 section, not the actual VMA. This is appropriate when generating
5465 an embedded ELF object, for which the .got section acts like the
5466 AIX .toc section. */
5467 case R_PPC_TOC16: /* phony GOT16 relocations */
5468 BFD_ASSERT (sec != NULL);
5469 BFD_ASSERT (bfd_is_und_section (sec)
5470 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
5471 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)
5472
5473 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
5474 break;
5475
5476 case R_PPC_PLTREL24:
5477 /* Relocation is to the entry for this symbol in the
5478 procedure linkage table. */
5479 BFD_ASSERT (h != NULL);
5480
5481 if (h->plt.offset == (bfd_vma) -1
5482 || htab->plt == NULL)
5483 {
5484 /* We didn't make a PLT entry for this symbol. This
5485 happens when statically linking PIC code, or when
5486 using -Bsymbolic. */
5487 break;
5488 }
5489
5490 unresolved_reloc = FALSE;
5491 relocation = (htab->plt->output_section->vma
5492 + htab->plt->output_offset
5493 + h->plt.offset);
5494 break;
5495
5496 /* Relocate against _SDA_BASE_. */
5497 case R_PPC_SDAREL16:
5498 {
5499 const char *name;
5500 const struct elf_link_hash_entry *sh;
5501
5502 BFD_ASSERT (sec != NULL);
5503 name = bfd_get_section_name (abfd, sec->output_section);
5504 if (! ((strncmp (name, ".sdata", 6) == 0
5505 && (name[6] == 0 || name[6] == '.'))
5506 || (strncmp (name, ".sbss", 5) == 0
5507 && (name[5] == 0 || name[5] == '.'))))
5508 {
5509 (*_bfd_error_handler)
5510 (_("%s: the target (%s) of a %s relocation is "
5511 "in the wrong output section (%s)"),
5512 bfd_archive_filename (input_bfd),
5513 sym_name,
5514 howto->name,
5515 name);
5516 }
5517 sh = htab->sdata->sym_hash;
5518 addend -= (sh->root.u.def.value
5519 + sh->root.u.def.section->output_section->vma
5520 + sh->root.u.def.section->output_offset);
5521 }
5522 break;
5523
5524 /* Relocate against _SDA2_BASE_. */
5525 case R_PPC_EMB_SDA2REL:
5526 {
5527 const char *name;
5528 const struct elf_link_hash_entry *sh;
5529
5530 BFD_ASSERT (sec != NULL);
5531 name = bfd_get_section_name (abfd, sec->output_section);
5532 if (! (strncmp (name, ".sdata2", 7) == 0
5533 || strncmp (name, ".sbss2", 6) == 0))
5534 {
5535 (*_bfd_error_handler)
5536 (_("%s: the target (%s) of a %s relocation is "
5537 "in the wrong output section (%s)"),
5538 bfd_archive_filename (input_bfd),
5539 sym_name,
5540 howto->name,
5541 name);
5542
5543 bfd_set_error (bfd_error_bad_value);
5544 ret = FALSE;
5545 continue;
5546 }
5547 sh = htab->sdata2->sym_hash;
5548 addend -= (sh->root.u.def.value
5549 + sh->root.u.def.section->output_section->vma
5550 + sh->root.u.def.section->output_offset);
5551 }
5552 break;
5553
5554 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
5555 case R_PPC_EMB_SDA21:
5556 case R_PPC_EMB_RELSDA:
5557 {
5558 const char *name;
5559 const struct elf_link_hash_entry *sh;
5560 int reg;
5561
5562 BFD_ASSERT (sec != NULL);
5563 name = bfd_get_section_name (abfd, sec->output_section);
5564 if (((strncmp (name, ".sdata", 6) == 0
5565 && (name[6] == 0 || name[6] == '.'))
5566 || (strncmp (name, ".sbss", 5) == 0
5567 && (name[5] == 0 || name[5] == '.'))))
5568 {
5569 reg = 13;
5570 sh = htab->sdata->sym_hash;
5571 addend -= (sh->root.u.def.value
5572 + sh->root.u.def.section->output_section->vma
5573 + sh->root.u.def.section->output_offset);
5574 }
5575
5576 else if (strncmp (name, ".sdata2", 7) == 0
5577 || strncmp (name, ".sbss2", 6) == 0)
5578 {
5579 reg = 2;
5580 sh = htab->sdata2->sym_hash;
5581 addend -= (sh->root.u.def.value
5582 + sh->root.u.def.section->output_section->vma
5583 + sh->root.u.def.section->output_offset);
5584 }
5585
5586 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
5587 || strcmp (name, ".PPC.EMB.sbss0") == 0)
5588 {
5589 reg = 0;
5590 }
5591
5592 else
5593 {
5594 (*_bfd_error_handler)
5595 (_("%s: the target (%s) of a %s relocation is "
5596 "in the wrong output section (%s)"),
5597 bfd_archive_filename (input_bfd),
5598 sym_name,
5599 howto->name,
5600 name);
5601
5602 bfd_set_error (bfd_error_bad_value);
5603 ret = FALSE;
5604 continue;
5605 }
5606
5607 if (r_type == R_PPC_EMB_SDA21)
5608 { /* fill in register field */
5609 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5610 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
5611 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5612 }
5613 }
5614 break;
5615
5616 /* Relocate against the beginning of the section. */
5617 case R_PPC_SECTOFF:
5618 case R_PPC_SECTOFF_LO:
5619 case R_PPC_SECTOFF_HI:
5620 case R_PPC_SECTOFF_HA:
5621 BFD_ASSERT (sec != NULL);
5622 addend -= sec->output_section->vma;
5623 break;
5624
5625 /* Negative relocations. */
5626 case R_PPC_EMB_NADDR32:
5627 case R_PPC_EMB_NADDR16:
5628 case R_PPC_EMB_NADDR16_LO:
5629 case R_PPC_EMB_NADDR16_HI:
5630 case R_PPC_EMB_NADDR16_HA:
5631 addend -= 2 * relocation;
5632 break;
5633
5634 case R_PPC_COPY:
5635 case R_PPC_GLOB_DAT:
5636 case R_PPC_JMP_SLOT:
5637 case R_PPC_RELATIVE:
5638 case R_PPC_PLT32:
5639 case R_PPC_PLTREL32:
5640 case R_PPC_PLT16_LO:
5641 case R_PPC_PLT16_HI:
5642 case R_PPC_PLT16_HA:
5643 case R_PPC_ADDR30:
5644 case R_PPC_EMB_RELSEC16:
5645 case R_PPC_EMB_RELST_LO:
5646 case R_PPC_EMB_RELST_HI:
5647 case R_PPC_EMB_RELST_HA:
5648 case R_PPC_EMB_BIT_FLD:
5649 (*_bfd_error_handler)
5650 (_("%s: relocation %s is not yet supported for symbol %s."),
5651 bfd_archive_filename (input_bfd),
5652 howto->name,
5653 sym_name);
5654
5655 bfd_set_error (bfd_error_invalid_operation);
5656 ret = FALSE;
5657 continue;
5658 }
5659
5660 /* Do any further special processing. */
5661 switch (r_type)
5662 {
5663 default:
5664 break;
5665
5666 case R_PPC_ADDR16_HA:
5667 case R_PPC_GOT16_HA:
5668 case R_PPC_PLT16_HA:
5669 case R_PPC_SECTOFF_HA:
5670 case R_PPC_TPREL16_HA:
5671 case R_PPC_DTPREL16_HA:
5672 case R_PPC_GOT_TLSGD16_HA:
5673 case R_PPC_GOT_TLSLD16_HA:
5674 case R_PPC_GOT_TPREL16_HA:
5675 case R_PPC_GOT_DTPREL16_HA:
5676 case R_PPC_EMB_NADDR16_HA:
5677 case R_PPC_EMB_RELST_HA:
5678 /* It's just possible that this symbol is a weak symbol
5679 that's not actually defined anywhere. In that case,
5680 'sec' would be NULL, and we should leave the symbol
5681 alone (it will be set to zero elsewhere in the link). */
5682 if (sec != NULL)
5683 /* Add 0x10000 if sign bit in 0:15 is set.
5684 Bits 0:15 are not used. */
5685 addend += 0x8000;
5686 break;
5687 }
5688
5689 #ifdef DEBUG
5690 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
5691 "offset = %ld, addend = %ld\n",
5692 howto->name,
5693 (int) r_type,
5694 sym_name,
5695 r_symndx,
5696 (long) rel->r_offset,
5697 (long) addend);
5698 #endif
5699
5700 if (unresolved_reloc
5701 && !((input_section->flags & SEC_DEBUGGING) != 0
5702 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
5703 {
5704 (*_bfd_error_handler)
5705 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
5706 bfd_archive_filename (input_bfd),
5707 bfd_get_section_name (input_bfd, input_section),
5708 (long) rel->r_offset,
5709 howto->name,
5710 sym_name);
5711 ret = FALSE;
5712 }
5713
5714 r = _bfd_final_link_relocate (howto,
5715 input_bfd,
5716 input_section,
5717 contents,
5718 rel->r_offset,
5719 relocation,
5720 addend);
5721
5722 if (r != bfd_reloc_ok)
5723 {
5724 if (sym_name == NULL)
5725 sym_name = "(null)";
5726 if (r == bfd_reloc_overflow)
5727 {
5728 if (warned)
5729 continue;
5730 if (h != NULL
5731 && h->root.type == bfd_link_hash_undefweak
5732 && howto->pc_relative)
5733 {
5734 /* Assume this is a call protected by other code that
5735 detect the symbol is undefined. If this is the case,
5736 we can safely ignore the overflow. If not, the
5737 program is hosed anyway, and a little warning isn't
5738 going to help. */
5739
5740 continue;
5741 }
5742
5743 if (! (*info->callbacks->reloc_overflow) (info,
5744 sym_name,
5745 howto->name,
5746 rel->r_addend,
5747 input_bfd,
5748 input_section,
5749 rel->r_offset))
5750 return FALSE;
5751 }
5752 else
5753 {
5754 (*_bfd_error_handler)
5755 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
5756 bfd_archive_filename (input_bfd),
5757 bfd_get_section_name (input_bfd, input_section),
5758 (long) rel->r_offset, howto->name, sym_name, (int) r);
5759 ret = FALSE;
5760 }
5761 }
5762 }
5763
5764 #ifdef DEBUG
5765 fprintf (stderr, "\n");
5766 #endif
5767
5768 return ret;
5769 }
5770
5771 static enum elf_reloc_type_class
5772 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
5773 {
5774 switch (ELF32_R_TYPE (rela->r_info))
5775 {
5776 case R_PPC_RELATIVE:
5777 return reloc_class_relative;
5778 case R_PPC_REL24:
5779 case R_PPC_ADDR24:
5780 case R_PPC_JMP_SLOT:
5781 return reloc_class_plt;
5782 case R_PPC_COPY:
5783 return reloc_class_copy;
5784 default:
5785 return reloc_class_normal;
5786 }
5787 }
5788 \f
5789 /* Support for core dump NOTE sections. */
5790
5791 static bfd_boolean
5792 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
5793 {
5794 int offset;
5795 unsigned int raw_size;
5796
5797 switch (note->descsz)
5798 {
5799 default:
5800 return FALSE;
5801
5802 case 268: /* Linux/PPC. */
5803 /* pr_cursig */
5804 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
5805
5806 /* pr_pid */
5807 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
5808
5809 /* pr_reg */
5810 offset = 72;
5811 raw_size = 192;
5812
5813 break;
5814 }
5815
5816 /* Make a ".reg/999" section. */
5817 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
5818 raw_size, note->descpos + offset);
5819 }
5820
5821 static bfd_boolean
5822 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
5823 {
5824 switch (note->descsz)
5825 {
5826 default:
5827 return FALSE;
5828
5829 case 128: /* Linux/PPC elf_prpsinfo. */
5830 elf_tdata (abfd)->core_program
5831 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
5832 elf_tdata (abfd)->core_command
5833 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
5834 }
5835
5836 /* Note that for some reason, a spurious space is tacked
5837 onto the end of the args in some (at least one anyway)
5838 implementations, so strip it off if it exists. */
5839
5840 {
5841 char *command = elf_tdata (abfd)->core_command;
5842 int n = strlen (command);
5843
5844 if (0 < n && command[n - 1] == ' ')
5845 command[n - 1] = '\0';
5846 }
5847
5848 return TRUE;
5849 }
5850 \f
5851 /* Very simple linked list structure for recording apuinfo values. */
5852 typedef struct apuinfo_list
5853 {
5854 struct apuinfo_list *next;
5855 unsigned long value;
5856 }
5857 apuinfo_list;
5858
5859 static apuinfo_list *head;
5860
5861
5862 static void
5863 apuinfo_list_init (void)
5864 {
5865 head = NULL;
5866 }
5867
5868 static void
5869 apuinfo_list_add (unsigned long value)
5870 {
5871 apuinfo_list *entry = head;
5872
5873 while (entry != NULL)
5874 {
5875 if (entry->value == value)
5876 return;
5877 entry = entry->next;
5878 }
5879
5880 entry = bfd_malloc (sizeof (* entry));
5881 if (entry == NULL)
5882 return;
5883
5884 entry->value = value;
5885 entry->next = head;
5886 head = entry;
5887 }
5888
5889 static unsigned
5890 apuinfo_list_length (void)
5891 {
5892 apuinfo_list *entry;
5893 unsigned long count;
5894
5895 for (entry = head, count = 0;
5896 entry;
5897 entry = entry->next)
5898 ++ count;
5899
5900 return count;
5901 }
5902
5903 static inline unsigned long
5904 apuinfo_list_element (unsigned long number)
5905 {
5906 apuinfo_list * entry;
5907
5908 for (entry = head;
5909 entry && number --;
5910 entry = entry->next)
5911 ;
5912
5913 return entry ? entry->value : 0;
5914 }
5915
5916 static void
5917 apuinfo_list_finish (void)
5918 {
5919 apuinfo_list *entry;
5920
5921 for (entry = head; entry;)
5922 {
5923 apuinfo_list *next = entry->next;
5924 free (entry);
5925 entry = next;
5926 }
5927
5928 head = NULL;
5929 }
5930
5931 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
5932 #define APUINFO_LABEL "APUinfo"
5933
5934 /* Scan the input BFDs and create a linked list of
5935 the APUinfo values that will need to be emitted. */
5936
5937 static void
5938 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
5939 {
5940 bfd *ibfd;
5941 asection *asec;
5942 char *buffer;
5943 unsigned num_input_sections;
5944 bfd_size_type output_section_size;
5945 unsigned i;
5946 unsigned num_entries;
5947 unsigned long offset;
5948 unsigned long length;
5949 const char *error_message = NULL;
5950
5951 if (link_info == NULL)
5952 return;
5953
5954 /* Scan the input bfds, looking for apuinfo sections. */
5955 num_input_sections = 0;
5956 output_section_size = 0;
5957
5958 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5959 {
5960 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
5961 if (asec)
5962 {
5963 ++ num_input_sections;
5964 output_section_size += asec->_raw_size;
5965 }
5966 }
5967
5968 /* We need at least one input sections
5969 in order to make merging worthwhile. */
5970 if (num_input_sections < 1)
5971 return;
5972
5973 /* Just make sure that the output section exists as well. */
5974 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
5975 if (asec == NULL)
5976 return;
5977
5978 /* Allocate a buffer for the contents of the input sections. */
5979 buffer = bfd_malloc (output_section_size);
5980 if (buffer == NULL)
5981 return;
5982
5983 offset = 0;
5984 apuinfo_list_init ();
5985
5986 /* Read in the input sections contents. */
5987 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5988 {
5989 unsigned long datum;
5990 char *ptr;
5991
5992 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
5993 if (asec == NULL)
5994 continue;
5995
5996 length = asec->_raw_size;
5997 if (length < 24)
5998 {
5999 error_message = _("corrupt or empty %s section in %s");
6000 goto fail;
6001 }
6002
6003 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
6004 || (bfd_bread (buffer + offset, length, ibfd) != length))
6005 {
6006 error_message = _("unable to read in %s section from %s");
6007 goto fail;
6008 }
6009
6010 /* Process the contents of the section. */
6011 ptr = buffer + offset;
6012 error_message = _("corrupt %s section in %s");
6013
6014 /* Verify the contents of the header. Note - we have to
6015 extract the values this way in order to allow for a
6016 host whose endian-ness is different from the target. */
6017 datum = bfd_get_32 (ibfd, ptr);
6018 if (datum != sizeof APUINFO_LABEL)
6019 goto fail;
6020
6021 datum = bfd_get_32 (ibfd, ptr + 8);
6022 if (datum != 0x2)
6023 goto fail;
6024
6025 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
6026 goto fail;
6027
6028 /* Get the number of bytes used for apuinfo entries. */
6029 datum = bfd_get_32 (ibfd, ptr + 4);
6030 if (datum + 20 != length)
6031 goto fail;
6032
6033 /* Make sure that we do not run off the end of the section. */
6034 if (offset + length > output_section_size)
6035 goto fail;
6036
6037 /* Scan the apuinfo section, building a list of apuinfo numbers. */
6038 for (i = 0; i < datum; i += 4)
6039 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
6040
6041 /* Update the offset. */
6042 offset += length;
6043 }
6044
6045 error_message = NULL;
6046
6047 /* Compute the size of the output section. */
6048 num_entries = apuinfo_list_length ();
6049 output_section_size = 20 + num_entries * 4;
6050
6051 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6052
6053 if (! bfd_set_section_size (abfd, asec, output_section_size))
6054 ibfd = abfd,
6055 error_message = _("warning: unable to set size of %s section in %s");
6056
6057 fail:
6058 free (buffer);
6059
6060 if (error_message)
6061 (*_bfd_error_handler) (error_message, APUINFO_SECTION_NAME,
6062 bfd_archive_filename (ibfd));
6063 }
6064
6065
6066 /* Prevent the output section from accumulating the input sections'
6067 contents. We have already stored this in our linked list structure. */
6068
6069 static bfd_boolean
6070 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
6071 asection *asec,
6072 bfd_byte *contents ATTRIBUTE_UNUSED)
6073 {
6074 return (apuinfo_list_length ()
6075 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
6076 }
6077
6078
6079 /* Finally we can generate the output section. */
6080
6081 static void
6082 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
6083 {
6084 bfd_byte *buffer;
6085 asection *asec;
6086 unsigned i;
6087 unsigned num_entries;
6088 bfd_size_type length;
6089
6090 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6091 if (asec == NULL)
6092 return;
6093
6094 if (apuinfo_list_length () == 0)
6095 return;
6096
6097 length = asec->_raw_size;
6098 if (length < 20)
6099 return;
6100
6101 buffer = bfd_malloc (length);
6102 if (buffer == NULL)
6103 {
6104 (*_bfd_error_handler)
6105 (_("failed to allocate space for new APUinfo section."));
6106 return;
6107 }
6108
6109 /* Create the apuinfo header. */
6110 num_entries = apuinfo_list_length ();
6111 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
6112 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
6113 bfd_put_32 (abfd, 0x2, buffer + 8);
6114 strcpy (buffer + 12, APUINFO_LABEL);
6115
6116 length = 20;
6117 for (i = 0; i < num_entries; i++)
6118 {
6119 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
6120 length += 4;
6121 }
6122
6123 if (length != asec->_raw_size)
6124 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
6125
6126 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
6127 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
6128
6129 free (buffer);
6130
6131 apuinfo_list_finish ();
6132 }
6133
6134 /* Add extra PPC sections -- Note, for now, make .sbss2 and
6135 .PPC.EMB.sbss0 a normal section, and not a bss section so
6136 that the linker doesn't crater when trying to make more than
6137 2 sections. */
6138
6139 static struct bfd_elf_special_section const ppc_elf_special_sections[]=
6140 {
6141 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
6142 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
6143 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
6144 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
6145 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
6146 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
6147 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
6148 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
6149 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
6150 { NULL, 0, 0, 0, 0 }
6151 };
6152 \f
6153 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
6154 #define TARGET_LITTLE_NAME "elf32-powerpcle"
6155 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
6156 #define TARGET_BIG_NAME "elf32-powerpc"
6157 #define ELF_ARCH bfd_arch_powerpc
6158 #define ELF_MACHINE_CODE EM_PPC
6159 #ifdef __QNXTARGET__
6160 #define ELF_MAXPAGESIZE 0x1000
6161 #else
6162 #define ELF_MAXPAGESIZE 0x10000
6163 #endif
6164 #define elf_info_to_howto ppc_elf_info_to_howto
6165
6166 #ifdef EM_CYGNUS_POWERPC
6167 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6168 #endif
6169
6170 #ifdef EM_PPC_OLD
6171 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6172 #endif
6173
6174 #define elf_backend_plt_not_loaded 1
6175 #define elf_backend_got_symbol_offset 4
6176 #define elf_backend_can_gc_sections 1
6177 #define elf_backend_can_refcount 1
6178 #define elf_backend_got_header_size 12
6179 #define elf_backend_rela_normal 1
6180
6181 #define bfd_elf32_mkobject ppc_elf_mkobject
6182 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
6183 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
6184 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
6185 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
6186 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
6187
6188 #define elf_backend_object_p ppc_elf_object_p
6189 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
6190 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
6191 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
6192 #define elf_backend_relocate_section ppc_elf_relocate_section
6193 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
6194 #define elf_backend_check_relocs ppc_elf_check_relocs
6195 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
6196 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
6197 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
6198 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
6199 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
6200 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
6201 #define elf_backend_fake_sections ppc_elf_fake_sections
6202 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
6203 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
6204 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
6205 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
6206 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
6207 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
6208 #define elf_backend_final_write_processing ppc_elf_final_write_processing
6209 #define elf_backend_write_section ppc_elf_write_section
6210 #define elf_backend_special_sections ppc_elf_special_sections
6211
6212 #include "elf32-target.h"
GDB Binutils - Deliverables
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