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* ld-mmix/bpo-9.d, ld-mmix/bpo-10.d, ld-mmix/bpo-11.d: Adjust for
[binutils.git] / bfd / elf32-ppc.c
blobb78a64c0cf5b33ae5e93ae5fc218cdd29aa97120
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc.h"
34 #include "elf32-ppc.h"
35
36 /* RELA relocations are used here. */
37
38 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc_elf_unhandled_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42
43 /* Branch prediction bit for branch taken relocs. */
44 #define BRANCH_PREDICT_BIT 0x200000
45 /* Mask to set RA in memory instructions. */
46 #define RA_REGISTER_MASK 0x001f0000
47 /* Value to shift register by to insert RA. */
48 #define RA_REGISTER_SHIFT 16
49
50 /* The name of the dynamic interpreter. This is put in the .interp
51 section. */
52 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
53
54 /* The size in bytes of an entry in the procedure linkage table. */
55 #define PLT_ENTRY_SIZE 12
56 /* The initial size of the plt reserved for the dynamic linker. */
57 #define PLT_INITIAL_ENTRY_SIZE 72
58 /* The size of the gap between entries in the PLT. */
59 #define PLT_SLOT_SIZE 8
60 /* The number of single-slot PLT entries (the rest use two slots). */
61 #define PLT_NUM_SINGLE_ENTRIES 8192
62
63 /* Some nop instructions. */
64 #define NOP 0x60000000
65 #define CROR_151515 0x4def7b82
66 #define CROR_313131 0x4ffffb82
67
68 /* Offset of tp and dtp pointers from start of TLS block. */
69 #define TP_OFFSET 0x7000
70 #define DTP_OFFSET 0x8000
71
72 \f
73 /* Enumeration to specify the special section. */
74 enum elf_linker_section_enum
75 {
76 LINKER_SECTION_SDATA,
77 LINKER_SECTION_SDATA2
78 };
79
80 /* Sections created by the linker. */
81
82 typedef struct elf_linker_section
83 {
84 /* pointer to the section */
85 asection *section;
86 /* pointer to the relocations needed for this section */
87 asection *rel_section;
88 /* pointer to the created symbol hash value */
89 struct elf_link_hash_entry *sym_hash;
90 /* offset of symbol from beginning of section */
91 bfd_vma sym_offset;
92 } elf_linker_section_t;
93
94 /* Linked list of allocated pointer entries. This hangs off of the
95 symbol lists, and provides allows us to return different pointers,
96 based on different addend's. */
97
98 typedef struct elf_linker_section_pointers
99 {
100 /* next allocated pointer for this symbol */
101 struct elf_linker_section_pointers *next;
102 /* offset of pointer from beginning of section */
103 bfd_vma offset;
104 /* addend used */
105 bfd_vma addend;
106 /* which linker section this is */
107 elf_linker_section_t *lsect;
108 /* whether address was written yet */
109 bfd_boolean written_address_p;
110 } elf_linker_section_pointers_t;
111
112 struct ppc_elf_obj_tdata
113 {
114 struct elf_obj_tdata elf;
115
116 /* A mapping from local symbols to offsets into the various linker
117 sections added. This is index by the symbol index. */
118 elf_linker_section_pointers_t **linker_section_pointers;
119 };
120
121 #define ppc_elf_tdata(bfd) \
122 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
123
124 #define elf_local_ptr_offsets(bfd) \
125 (ppc_elf_tdata (bfd)->linker_section_pointers)
126
127 /* Override the generic function because we store some extras. */
128
129 static bfd_boolean
130 ppc_elf_mkobject (bfd *abfd)
131 {
132 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
133 abfd->tdata.any = bfd_zalloc (abfd, amt);
134 if (abfd->tdata.any == NULL)
135 return FALSE;
136 return TRUE;
137 }
138
139 /* The PPC linker needs to keep track of the number of relocs that it
140 decides to copy as dynamic relocs in check_relocs for each symbol.
141 This is so that it can later discard them if they are found to be
142 unnecessary. We store the information in a field extending the
143 regular ELF linker hash table. */
144
145 struct ppc_elf_dyn_relocs
146 {
147 struct ppc_elf_dyn_relocs *next;
148
149 /* The input section of the reloc. */
150 asection *sec;
151
152 /* Total number of relocs copied for the input section. */
153 bfd_size_type count;
154
155 /* Number of pc-relative relocs copied for the input section. */
156 bfd_size_type pc_count;
157 };
158
159 /* PPC ELF linker hash entry. */
160
161 struct ppc_elf_link_hash_entry
162 {
163 struct elf_link_hash_entry elf;
164
165 /* If this symbol is used in the linker created sections, the processor
166 specific backend uses this field to map the field into the offset
167 from the beginning of the section. */
168 elf_linker_section_pointers_t *linker_section_pointer;
169
170 /* Track dynamic relocs copied for this symbol. */
171 struct ppc_elf_dyn_relocs *dyn_relocs;
172
173 /* Contexts in which symbol is used in the GOT (or TOC).
174 TLS_GD .. TLS_TLS bits are or'd into the mask as the
175 corresponding relocs are encountered during check_relocs.
176 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
177 indicate the corresponding GOT entry type is not needed. */
178 #define TLS_GD 1 /* GD reloc. */
179 #define TLS_LD 2 /* LD reloc. */
180 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
181 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
182 #define TLS_TLS 16 /* Any TLS reloc. */
183 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
184 char tls_mask;
185 };
186
187 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
188
189 /* PPC ELF linker hash table. */
190
191 struct ppc_elf_link_hash_table
192 {
193 struct elf_link_hash_table elf;
194
195 /* Short-cuts to get to dynamic linker sections. */
196 asection *got;
197 asection *relgot;
198 asection *plt;
199 asection *relplt;
200 asection *dynbss;
201 asection *relbss;
202 asection *dynsbss;
203 asection *relsbss;
204 elf_linker_section_t *sdata;
205 elf_linker_section_t *sdata2;
206 asection *sbss;
207
208 /* Short-cut to first output tls section. */
209 asection *tls_sec;
210
211 /* Shortcut to .__tls_get_addr. */
212 struct elf_link_hash_entry *tls_get_addr;
213
214 /* TLS local dynamic got entry handling. */
215 union {
216 bfd_signed_vma refcount;
217 bfd_vma offset;
218 } tlsld_got;
219
220 /* Small local sym to section mapping cache. */
221 struct sym_sec_cache sym_sec;
222 };
223
224 /* Get the PPC ELF linker hash table from a link_info structure. */
225
226 #define ppc_elf_hash_table(p) \
227 ((struct ppc_elf_link_hash_table *) (p)->hash)
228
229 /* Create an entry in a PPC ELF linker hash table. */
230
231 static struct bfd_hash_entry *
232 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
233 struct bfd_hash_table *table,
234 const char *string)
235 {
236 /* Allocate the structure if it has not already been allocated by a
237 subclass. */
238 if (entry == NULL)
239 {
240 entry = bfd_hash_allocate (table,
241 sizeof (struct ppc_elf_link_hash_entry));
242 if (entry == NULL)
243 return entry;
244 }
245
246 /* Call the allocation method of the superclass. */
247 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
248 if (entry != NULL)
249 {
250 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
251 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
252 ppc_elf_hash_entry (entry)->tls_mask = 0;
253 }
254
255 return entry;
256 }
257
258 /* Create a PPC ELF linker hash table. */
259
260 static struct bfd_link_hash_table *
261 ppc_elf_link_hash_table_create (bfd *abfd)
262 {
263 struct ppc_elf_link_hash_table *ret;
264
265 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
266 if (ret == NULL)
267 return NULL;
268
269 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
270 ppc_elf_link_hash_newfunc))
271 {
272 free (ret);
273 return NULL;
274 }
275
276 return &ret->elf.root;
277 }
278
279 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
280 copying dynamic variables from a shared lib into an app's dynbss
281 section, and instead use a dynamic relocation to point into the
282 shared lib. */
283 #define ELIMINATE_COPY_RELOCS 1
284
285 /* Copy the extra info we tack onto an elf_link_hash_entry. */
286
287 static void
288 ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed,
289 struct elf_link_hash_entry *dir,
290 struct elf_link_hash_entry *ind)
291 {
292 struct ppc_elf_link_hash_entry *edir, *eind;
293
294 edir = (struct ppc_elf_link_hash_entry *) dir;
295 eind = (struct ppc_elf_link_hash_entry *) ind;
296
297 if (eind->dyn_relocs != NULL)
298 {
299 if (edir->dyn_relocs != NULL)
300 {
301 struct ppc_elf_dyn_relocs **pp;
302 struct ppc_elf_dyn_relocs *p;
303
304 if (ind->root.type == bfd_link_hash_indirect)
305 abort ();
306
307 /* Add reloc counts against the weak sym to the strong sym
308 list. Merge any entries against the same section. */
309 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
310 {
311 struct ppc_elf_dyn_relocs *q;
312
313 for (q = edir->dyn_relocs; q != NULL; q = q->next)
314 if (q->sec == p->sec)
315 {
316 q->pc_count += p->pc_count;
317 q->count += p->count;
318 *pp = p->next;
319 break;
320 }
321 if (q == NULL)
322 pp = &p->next;
323 }
324 *pp = edir->dyn_relocs;
325 }
326
327 edir->dyn_relocs = eind->dyn_relocs;
328 eind->dyn_relocs = NULL;
329 }
330
331 edir->tls_mask |= eind->tls_mask;
332
333 if (ELIMINATE_COPY_RELOCS
334 && ind->root.type != bfd_link_hash_indirect
335 && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
336 /* If called to transfer flags for a weakdef during processing
337 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
338 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
339 dir->elf_link_hash_flags |=
340 (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
341 | ELF_LINK_HASH_REF_REGULAR
342 | ELF_LINK_HASH_REF_REGULAR_NONWEAK));
343 else
344 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
345 }
346 \f
347 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
348
349 static reloc_howto_type ppc_elf_howto_raw[] = {
350 /* This reloc does nothing. */
351 HOWTO (R_PPC_NONE, /* type */
352 0, /* rightshift */
353 2, /* size (0 = byte, 1 = short, 2 = long) */
354 32, /* bitsize */
355 FALSE, /* pc_relative */
356 0, /* bitpos */
357 complain_overflow_bitfield, /* complain_on_overflow */
358 bfd_elf_generic_reloc, /* special_function */
359 "R_PPC_NONE", /* name */
360 FALSE, /* partial_inplace */
361 0, /* src_mask */
362 0, /* dst_mask */
363 FALSE), /* pcrel_offset */
364
365 /* A standard 32 bit relocation. */
366 HOWTO (R_PPC_ADDR32, /* type */
367 0, /* rightshift */
368 2, /* size (0 = byte, 1 = short, 2 = long) */
369 32, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_bitfield, /* complain_on_overflow */
373 bfd_elf_generic_reloc, /* special_function */
374 "R_PPC_ADDR32", /* name */
375 FALSE, /* partial_inplace */
376 0, /* src_mask */
377 0xffffffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 /* An absolute 26 bit branch; the lower two bits must be zero.
381 FIXME: we don't check that, we just clear them. */
382 HOWTO (R_PPC_ADDR24, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 26, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_bitfield, /* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_PPC_ADDR24", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0x3fffffc, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 /* A standard 16 bit relocation. */
397 HOWTO (R_PPC_ADDR16, /* type */
398 0, /* rightshift */
399 1, /* size (0 = byte, 1 = short, 2 = long) */
400 16, /* bitsize */
401 FALSE, /* pc_relative */
402 0, /* bitpos */
403 complain_overflow_bitfield, /* complain_on_overflow */
404 bfd_elf_generic_reloc, /* special_function */
405 "R_PPC_ADDR16", /* name */
406 FALSE, /* partial_inplace */
407 0, /* src_mask */
408 0xffff, /* dst_mask */
409 FALSE), /* pcrel_offset */
410
411 /* A 16 bit relocation without overflow. */
412 HOWTO (R_PPC_ADDR16_LO, /* type */
413 0, /* rightshift */
414 1, /* size (0 = byte, 1 = short, 2 = long) */
415 16, /* bitsize */
416 FALSE, /* pc_relative */
417 0, /* bitpos */
418 complain_overflow_dont,/* complain_on_overflow */
419 bfd_elf_generic_reloc, /* special_function */
420 "R_PPC_ADDR16_LO", /* name */
421 FALSE, /* partial_inplace */
422 0, /* src_mask */
423 0xffff, /* dst_mask */
424 FALSE), /* pcrel_offset */
425
426 /* The high order 16 bits of an address. */
427 HOWTO (R_PPC_ADDR16_HI, /* type */
428 16, /* rightshift */
429 1, /* size (0 = byte, 1 = short, 2 = long) */
430 16, /* bitsize */
431 FALSE, /* pc_relative */
432 0, /* bitpos */
433 complain_overflow_dont, /* complain_on_overflow */
434 bfd_elf_generic_reloc, /* special_function */
435 "R_PPC_ADDR16_HI", /* name */
436 FALSE, /* partial_inplace */
437 0, /* src_mask */
438 0xffff, /* dst_mask */
439 FALSE), /* pcrel_offset */
440
441 /* The high order 16 bits of an address, plus 1 if the contents of
442 the low 16 bits, treated as a signed number, is negative. */
443 HOWTO (R_PPC_ADDR16_HA, /* type */
444 16, /* rightshift */
445 1, /* size (0 = byte, 1 = short, 2 = long) */
446 16, /* bitsize */
447 FALSE, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_dont, /* complain_on_overflow */
450 ppc_elf_addr16_ha_reloc, /* special_function */
451 "R_PPC_ADDR16_HA", /* name */
452 FALSE, /* partial_inplace */
453 0, /* src_mask */
454 0xffff, /* dst_mask */
455 FALSE), /* pcrel_offset */
456
457 /* An absolute 16 bit branch; the lower two bits must be zero.
458 FIXME: we don't check that, we just clear them. */
459 HOWTO (R_PPC_ADDR14, /* type */
460 0, /* rightshift */
461 2, /* size (0 = byte, 1 = short, 2 = long) */
462 16, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_bitfield, /* complain_on_overflow */
466 bfd_elf_generic_reloc, /* special_function */
467 "R_PPC_ADDR14", /* name */
468 FALSE, /* partial_inplace */
469 0, /* src_mask */
470 0xfffc, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 /* An absolute 16 bit branch, for which bit 10 should be set to
474 indicate that the branch is expected to be taken. The lower two
475 bits must be zero. */
476 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
477 0, /* rightshift */
478 2, /* size (0 = byte, 1 = short, 2 = long) */
479 16, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_bitfield, /* complain_on_overflow */
483 bfd_elf_generic_reloc, /* special_function */
484 "R_PPC_ADDR14_BRTAKEN",/* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0xfffc, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* An absolute 16 bit branch, for which bit 10 should be set to
491 indicate that the branch is not expected to be taken. The lower
492 two bits must be zero. */
493 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 16, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_bitfield, /* complain_on_overflow */
500 bfd_elf_generic_reloc, /* special_function */
501 "R_PPC_ADDR14_BRNTAKEN",/* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0xfffc, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* A relative 26 bit branch; the lower two bits must be zero. */
508 HOWTO (R_PPC_REL24, /* type */
509 0, /* rightshift */
510 2, /* size (0 = byte, 1 = short, 2 = long) */
511 26, /* bitsize */
512 TRUE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_signed, /* complain_on_overflow */
515 bfd_elf_generic_reloc, /* special_function */
516 "R_PPC_REL24", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0x3fffffc, /* dst_mask */
520 TRUE), /* pcrel_offset */
521
522 /* A relative 16 bit branch; the lower two bits must be zero. */
523 HOWTO (R_PPC_REL14, /* type */
524 0, /* rightshift */
525 2, /* size (0 = byte, 1 = short, 2 = long) */
526 16, /* bitsize */
527 TRUE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_signed, /* complain_on_overflow */
530 bfd_elf_generic_reloc, /* special_function */
531 "R_PPC_REL14", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0xfffc, /* dst_mask */
535 TRUE), /* pcrel_offset */
536
537 /* A relative 16 bit branch. Bit 10 should be set to indicate that
538 the branch is expected to be taken. The lower two bits must be
539 zero. */
540 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
541 0, /* rightshift */
542 2, /* size (0 = byte, 1 = short, 2 = long) */
543 16, /* bitsize */
544 TRUE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_signed, /* complain_on_overflow */
547 bfd_elf_generic_reloc, /* special_function */
548 "R_PPC_REL14_BRTAKEN", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0xfffc, /* dst_mask */
552 TRUE), /* pcrel_offset */
553
554 /* A relative 16 bit branch. Bit 10 should be set to indicate that
555 the branch is not expected to be taken. The lower two bits must
556 be zero. */
557 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
558 0, /* rightshift */
559 2, /* size (0 = byte, 1 = short, 2 = long) */
560 16, /* bitsize */
561 TRUE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_signed, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC_REL14_BRNTAKEN",/* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 0xfffc, /* dst_mask */
569 TRUE), /* pcrel_offset */
570
571 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
572 symbol. */
573 HOWTO (R_PPC_GOT16, /* type */
574 0, /* rightshift */
575 1, /* size (0 = byte, 1 = short, 2 = long) */
576 16, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_signed, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_GOT16", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
588 the symbol. */
589 HOWTO (R_PPC_GOT16_LO, /* type */
590 0, /* rightshift */
591 1, /* size (0 = byte, 1 = short, 2 = long) */
592 16, /* bitsize */
593 FALSE, /* pc_relative */
594 0, /* bitpos */
595 complain_overflow_dont, /* complain_on_overflow */
596 bfd_elf_generic_reloc, /* special_function */
597 "R_PPC_GOT16_LO", /* name */
598 FALSE, /* partial_inplace */
599 0, /* src_mask */
600 0xffff, /* dst_mask */
601 FALSE), /* pcrel_offset */
602
603 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
604 the symbol. */
605 HOWTO (R_PPC_GOT16_HI, /* type */
606 16, /* rightshift */
607 1, /* size (0 = byte, 1 = short, 2 = long) */
608 16, /* bitsize */
609 FALSE, /* pc_relative */
610 0, /* bitpos */
611 complain_overflow_bitfield, /* complain_on_overflow */
612 bfd_elf_generic_reloc, /* special_function */
613 "R_PPC_GOT16_HI", /* name */
614 FALSE, /* partial_inplace */
615 0, /* src_mask */
616 0xffff, /* dst_mask */
617 FALSE), /* pcrel_offset */
618
619 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
620 the symbol. */
621 HOWTO (R_PPC_GOT16_HA, /* type */
622 16, /* rightshift */
623 1, /* size (0 = byte, 1 = short, 2 = long) */
624 16, /* bitsize */
625 FALSE, /* pc_relative */
626 0, /* bitpos */
627 complain_overflow_bitfield, /* complain_on_overflow */
628 ppc_elf_addr16_ha_reloc, /* special_function */
629 "R_PPC_GOT16_HA", /* name */
630 FALSE, /* partial_inplace */
631 0, /* src_mask */
632 0xffff, /* dst_mask */
633 FALSE), /* pcrel_offset */
634
635 /* Like R_PPC_REL24, but referring to the procedure linkage table
636 entry for the symbol. */
637 HOWTO (R_PPC_PLTREL24, /* type */
638 0, /* rightshift */
639 2, /* size (0 = byte, 1 = short, 2 = long) */
640 26, /* bitsize */
641 TRUE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_signed, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC_PLTREL24", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0x3fffffc, /* dst_mask */
649 TRUE), /* pcrel_offset */
650
651 /* This is used only by the dynamic linker. The symbol should exist
652 both in the object being run and in some shared library. The
653 dynamic linker copies the data addressed by the symbol from the
654 shared library into the object, because the object being
655 run has to have the data at some particular address. */
656 HOWTO (R_PPC_COPY, /* type */
657 0, /* rightshift */
658 2, /* size (0 = byte, 1 = short, 2 = long) */
659 32, /* bitsize */
660 FALSE, /* pc_relative */
661 0, /* bitpos */
662 complain_overflow_bitfield, /* complain_on_overflow */
663 bfd_elf_generic_reloc, /* special_function */
664 "R_PPC_COPY", /* name */
665 FALSE, /* partial_inplace */
666 0, /* src_mask */
667 0, /* dst_mask */
668 FALSE), /* pcrel_offset */
669
670 /* Like R_PPC_ADDR32, but used when setting global offset table
671 entries. */
672 HOWTO (R_PPC_GLOB_DAT, /* type */
673 0, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 32, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_bitfield, /* complain_on_overflow */
679 bfd_elf_generic_reloc, /* special_function */
680 "R_PPC_GLOB_DAT", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffffffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* Marks a procedure linkage table entry for a symbol. */
687 HOWTO (R_PPC_JMP_SLOT, /* type */
688 0, /* rightshift */
689 2, /* size (0 = byte, 1 = short, 2 = long) */
690 32, /* bitsize */
691 FALSE, /* pc_relative */
692 0, /* bitpos */
693 complain_overflow_bitfield, /* complain_on_overflow */
694 bfd_elf_generic_reloc, /* special_function */
695 "R_PPC_JMP_SLOT", /* name */
696 FALSE, /* partial_inplace */
697 0, /* src_mask */
698 0, /* dst_mask */
699 FALSE), /* pcrel_offset */
700
701 /* Used only by the dynamic linker. When the object is run, this
702 longword is set to the load address of the object, plus the
703 addend. */
704 HOWTO (R_PPC_RELATIVE, /* type */
705 0, /* rightshift */
706 2, /* size (0 = byte, 1 = short, 2 = long) */
707 32, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_bitfield, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_PPC_RELATIVE", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffffffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* Like R_PPC_REL24, but uses the value of the symbol within the
719 object rather than the final value. Normally used for
720 _GLOBAL_OFFSET_TABLE_. */
721 HOWTO (R_PPC_LOCAL24PC, /* type */
722 0, /* rightshift */
723 2, /* size (0 = byte, 1 = short, 2 = long) */
724 26, /* bitsize */
725 TRUE, /* pc_relative */
726 0, /* bitpos */
727 complain_overflow_signed, /* complain_on_overflow */
728 bfd_elf_generic_reloc, /* special_function */
729 "R_PPC_LOCAL24PC", /* name */
730 FALSE, /* partial_inplace */
731 0, /* src_mask */
732 0x3fffffc, /* dst_mask */
733 TRUE), /* pcrel_offset */
734
735 /* Like R_PPC_ADDR32, but may be unaligned. */
736 HOWTO (R_PPC_UADDR32, /* type */
737 0, /* rightshift */
738 2, /* size (0 = byte, 1 = short, 2 = long) */
739 32, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_bitfield, /* complain_on_overflow */
743 bfd_elf_generic_reloc, /* special_function */
744 "R_PPC_UADDR32", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffffffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* Like R_PPC_ADDR16, but may be unaligned. */
751 HOWTO (R_PPC_UADDR16, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_bitfield, /* complain_on_overflow */
758 bfd_elf_generic_reloc, /* special_function */
759 "R_PPC_UADDR16", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* 32-bit PC relative */
766 HOWTO (R_PPC_REL32, /* type */
767 0, /* rightshift */
768 2, /* size (0 = byte, 1 = short, 2 = long) */
769 32, /* bitsize */
770 TRUE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_bitfield, /* complain_on_overflow */
773 bfd_elf_generic_reloc, /* special_function */
774 "R_PPC_REL32", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffffffff, /* dst_mask */
778 TRUE), /* pcrel_offset */
779
780 /* 32-bit relocation to the symbol's procedure linkage table.
781 FIXME: not supported. */
782 HOWTO (R_PPC_PLT32, /* type */
783 0, /* rightshift */
784 2, /* size (0 = byte, 1 = short, 2 = long) */
785 32, /* bitsize */
786 FALSE, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_bitfield, /* complain_on_overflow */
789 bfd_elf_generic_reloc, /* special_function */
790 "R_PPC_PLT32", /* name */
791 FALSE, /* partial_inplace */
792 0, /* src_mask */
793 0, /* dst_mask */
794 FALSE), /* pcrel_offset */
795
796 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
797 FIXME: not supported. */
798 HOWTO (R_PPC_PLTREL32, /* type */
799 0, /* rightshift */
800 2, /* size (0 = byte, 1 = short, 2 = long) */
801 32, /* bitsize */
802 TRUE, /* pc_relative */
803 0, /* bitpos */
804 complain_overflow_bitfield, /* complain_on_overflow */
805 bfd_elf_generic_reloc, /* special_function */
806 "R_PPC_PLTREL32", /* name */
807 FALSE, /* partial_inplace */
808 0, /* src_mask */
809 0, /* dst_mask */
810 TRUE), /* pcrel_offset */
811
812 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
813 the symbol. */
814 HOWTO (R_PPC_PLT16_LO, /* type */
815 0, /* rightshift */
816 1, /* size (0 = byte, 1 = short, 2 = long) */
817 16, /* bitsize */
818 FALSE, /* pc_relative */
819 0, /* bitpos */
820 complain_overflow_dont, /* complain_on_overflow */
821 bfd_elf_generic_reloc, /* special_function */
822 "R_PPC_PLT16_LO", /* name */
823 FALSE, /* partial_inplace */
824 0, /* src_mask */
825 0xffff, /* dst_mask */
826 FALSE), /* pcrel_offset */
827
828 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
829 the symbol. */
830 HOWTO (R_PPC_PLT16_HI, /* type */
831 16, /* rightshift */
832 1, /* size (0 = byte, 1 = short, 2 = long) */
833 16, /* bitsize */
834 FALSE, /* pc_relative */
835 0, /* bitpos */
836 complain_overflow_bitfield, /* complain_on_overflow */
837 bfd_elf_generic_reloc, /* special_function */
838 "R_PPC_PLT16_HI", /* name */
839 FALSE, /* partial_inplace */
840 0, /* src_mask */
841 0xffff, /* dst_mask */
842 FALSE), /* pcrel_offset */
843
844 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
845 the symbol. */
846 HOWTO (R_PPC_PLT16_HA, /* type */
847 16, /* rightshift */
848 1, /* size (0 = byte, 1 = short, 2 = long) */
849 16, /* bitsize */
850 FALSE, /* pc_relative */
851 0, /* bitpos */
852 complain_overflow_bitfield, /* complain_on_overflow */
853 ppc_elf_addr16_ha_reloc, /* special_function */
854 "R_PPC_PLT16_HA", /* name */
855 FALSE, /* partial_inplace */
856 0, /* src_mask */
857 0xffff, /* dst_mask */
858 FALSE), /* pcrel_offset */
859
860 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
861 small data items. */
862 HOWTO (R_PPC_SDAREL16, /* type */
863 0, /* rightshift */
864 1, /* size (0 = byte, 1 = short, 2 = long) */
865 16, /* bitsize */
866 FALSE, /* pc_relative */
867 0, /* bitpos */
868 complain_overflow_signed, /* complain_on_overflow */
869 bfd_elf_generic_reloc, /* special_function */
870 "R_PPC_SDAREL16", /* name */
871 FALSE, /* partial_inplace */
872 0, /* src_mask */
873 0xffff, /* dst_mask */
874 FALSE), /* pcrel_offset */
875
876 /* 16-bit section relative relocation. */
877 HOWTO (R_PPC_SECTOFF, /* type */
878 0, /* rightshift */
879 1, /* size (0 = byte, 1 = short, 2 = long) */
880 16, /* bitsize */
881 FALSE, /* pc_relative */
882 0, /* bitpos */
883 complain_overflow_bitfield, /* complain_on_overflow */
884 bfd_elf_generic_reloc, /* special_function */
885 "R_PPC_SECTOFF", /* name */
886 FALSE, /* partial_inplace */
887 0, /* src_mask */
888 0xffff, /* dst_mask */
889 FALSE), /* pcrel_offset */
890
891 /* 16-bit lower half section relative relocation. */
892 HOWTO (R_PPC_SECTOFF_LO, /* type */
893 0, /* rightshift */
894 1, /* size (0 = byte, 1 = short, 2 = long) */
895 16, /* bitsize */
896 FALSE, /* pc_relative */
897 0, /* bitpos */
898 complain_overflow_dont, /* complain_on_overflow */
899 bfd_elf_generic_reloc, /* special_function */
900 "R_PPC_SECTOFF_LO", /* name */
901 FALSE, /* partial_inplace */
902 0, /* src_mask */
903 0xffff, /* dst_mask */
904 FALSE), /* pcrel_offset */
905
906 /* 16-bit upper half section relative relocation. */
907 HOWTO (R_PPC_SECTOFF_HI, /* type */
908 16, /* rightshift */
909 1, /* size (0 = byte, 1 = short, 2 = long) */
910 16, /* bitsize */
911 FALSE, /* pc_relative */
912 0, /* bitpos */
913 complain_overflow_bitfield, /* complain_on_overflow */
914 bfd_elf_generic_reloc, /* special_function */
915 "R_PPC_SECTOFF_HI", /* name */
916 FALSE, /* partial_inplace */
917 0, /* src_mask */
918 0xffff, /* dst_mask */
919 FALSE), /* pcrel_offset */
920
921 /* 16-bit upper half adjusted section relative relocation. */
922 HOWTO (R_PPC_SECTOFF_HA, /* type */
923 16, /* rightshift */
924 1, /* size (0 = byte, 1 = short, 2 = long) */
925 16, /* bitsize */
926 FALSE, /* pc_relative */
927 0, /* bitpos */
928 complain_overflow_bitfield, /* complain_on_overflow */
929 ppc_elf_addr16_ha_reloc, /* special_function */
930 "R_PPC_SECTOFF_HA", /* name */
931 FALSE, /* partial_inplace */
932 0, /* src_mask */
933 0xffff, /* dst_mask */
934 FALSE), /* pcrel_offset */
935
936 /* Marker reloc for TLS. */
937 HOWTO (R_PPC_TLS,
938 0, /* rightshift */
939 2, /* size (0 = byte, 1 = short, 2 = long) */
940 32, /* bitsize */
941 FALSE, /* pc_relative */
942 0, /* bitpos */
943 complain_overflow_dont, /* complain_on_overflow */
944 bfd_elf_generic_reloc, /* special_function */
945 "R_PPC_TLS", /* name */
946 FALSE, /* partial_inplace */
947 0, /* src_mask */
948 0, /* dst_mask */
949 FALSE), /* pcrel_offset */
950
951 /* Computes the load module index of the load module that contains the
952 definition of its TLS sym. */
953 HOWTO (R_PPC_DTPMOD32,
954 0, /* rightshift */
955 2, /* size (0 = byte, 1 = short, 2 = long) */
956 32, /* bitsize */
957 FALSE, /* pc_relative */
958 0, /* bitpos */
959 complain_overflow_dont, /* complain_on_overflow */
960 ppc_elf_unhandled_reloc, /* special_function */
961 "R_PPC_DTPMOD32", /* name */
962 FALSE, /* partial_inplace */
963 0, /* src_mask */
964 0xffffffff, /* dst_mask */
965 FALSE), /* pcrel_offset */
966
967 /* Computes a dtv-relative displacement, the difference between the value
968 of sym+add and the base address of the thread-local storage block that
969 contains the definition of sym, minus 0x8000. */
970 HOWTO (R_PPC_DTPREL32,
971 0, /* rightshift */
972 2, /* size (0 = byte, 1 = short, 2 = long) */
973 32, /* bitsize */
974 FALSE, /* pc_relative */
975 0, /* bitpos */
976 complain_overflow_dont, /* complain_on_overflow */
977 ppc_elf_unhandled_reloc, /* special_function */
978 "R_PPC_DTPREL32", /* name */
979 FALSE, /* partial_inplace */
980 0, /* src_mask */
981 0xffffffff, /* dst_mask */
982 FALSE), /* pcrel_offset */
983
984 /* A 16 bit dtprel reloc. */
985 HOWTO (R_PPC_DTPREL16,
986 0, /* rightshift */
987 1, /* size (0 = byte, 1 = short, 2 = long) */
988 16, /* bitsize */
989 FALSE, /* pc_relative */
990 0, /* bitpos */
991 complain_overflow_signed, /* complain_on_overflow */
992 ppc_elf_unhandled_reloc, /* special_function */
993 "R_PPC_DTPREL16", /* name */
994 FALSE, /* partial_inplace */
995 0, /* src_mask */
996 0xffff, /* dst_mask */
997 FALSE), /* pcrel_offset */
998
999 /* Like DTPREL16, but no overflow. */
1000 HOWTO (R_PPC_DTPREL16_LO,
1001 0, /* rightshift */
1002 1, /* size (0 = byte, 1 = short, 2 = long) */
1003 16, /* bitsize */
1004 FALSE, /* pc_relative */
1005 0, /* bitpos */
1006 complain_overflow_dont, /* complain_on_overflow */
1007 ppc_elf_unhandled_reloc, /* special_function */
1008 "R_PPC_DTPREL16_LO", /* name */
1009 FALSE, /* partial_inplace */
1010 0, /* src_mask */
1011 0xffff, /* dst_mask */
1012 FALSE), /* pcrel_offset */
1013
1014 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1015 HOWTO (R_PPC_DTPREL16_HI,
1016 16, /* rightshift */
1017 1, /* size (0 = byte, 1 = short, 2 = long) */
1018 16, /* bitsize */
1019 FALSE, /* pc_relative */
1020 0, /* bitpos */
1021 complain_overflow_dont, /* complain_on_overflow */
1022 ppc_elf_unhandled_reloc, /* special_function */
1023 "R_PPC_DTPREL16_HI", /* name */
1024 FALSE, /* partial_inplace */
1025 0, /* src_mask */
1026 0xffff, /* dst_mask */
1027 FALSE), /* pcrel_offset */
1028
1029 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1030 HOWTO (R_PPC_DTPREL16_HA,
1031 16, /* rightshift */
1032 1, /* size (0 = byte, 1 = short, 2 = long) */
1033 16, /* bitsize */
1034 FALSE, /* pc_relative */
1035 0, /* bitpos */
1036 complain_overflow_dont, /* complain_on_overflow */
1037 ppc_elf_unhandled_reloc, /* special_function */
1038 "R_PPC_DTPREL16_HA", /* name */
1039 FALSE, /* partial_inplace */
1040 0, /* src_mask */
1041 0xffff, /* dst_mask */
1042 FALSE), /* pcrel_offset */
1043
1044 /* Computes a tp-relative displacement, the difference between the value of
1045 sym+add and the value of the thread pointer (r13). */
1046 HOWTO (R_PPC_TPREL32,
1047 0, /* rightshift */
1048 2, /* size (0 = byte, 1 = short, 2 = long) */
1049 32, /* bitsize */
1050 FALSE, /* pc_relative */
1051 0, /* bitpos */
1052 complain_overflow_dont, /* complain_on_overflow */
1053 ppc_elf_unhandled_reloc, /* special_function */
1054 "R_PPC_TPREL32", /* name */
1055 FALSE, /* partial_inplace */
1056 0, /* src_mask */
1057 0xffffffff, /* dst_mask */
1058 FALSE), /* pcrel_offset */
1059
1060 /* A 16 bit tprel reloc. */
1061 HOWTO (R_PPC_TPREL16,
1062 0, /* rightshift */
1063 1, /* size (0 = byte, 1 = short, 2 = long) */
1064 16, /* bitsize */
1065 FALSE, /* pc_relative */
1066 0, /* bitpos */
1067 complain_overflow_signed, /* complain_on_overflow */
1068 ppc_elf_unhandled_reloc, /* special_function */
1069 "R_PPC_TPREL16", /* name */
1070 FALSE, /* partial_inplace */
1071 0, /* src_mask */
1072 0xffff, /* dst_mask */
1073 FALSE), /* pcrel_offset */
1074
1075 /* Like TPREL16, but no overflow. */
1076 HOWTO (R_PPC_TPREL16_LO,
1077 0, /* rightshift */
1078 1, /* size (0 = byte, 1 = short, 2 = long) */
1079 16, /* bitsize */
1080 FALSE, /* pc_relative */
1081 0, /* bitpos */
1082 complain_overflow_dont, /* complain_on_overflow */
1083 ppc_elf_unhandled_reloc, /* special_function */
1084 "R_PPC_TPREL16_LO", /* name */
1085 FALSE, /* partial_inplace */
1086 0, /* src_mask */
1087 0xffff, /* dst_mask */
1088 FALSE), /* pcrel_offset */
1089
1090 /* Like TPREL16_LO, but next higher group of 16 bits. */
1091 HOWTO (R_PPC_TPREL16_HI,
1092 16, /* rightshift */
1093 1, /* size (0 = byte, 1 = short, 2 = long) */
1094 16, /* bitsize */
1095 FALSE, /* pc_relative */
1096 0, /* bitpos */
1097 complain_overflow_dont, /* complain_on_overflow */
1098 ppc_elf_unhandled_reloc, /* special_function */
1099 "R_PPC_TPREL16_HI", /* name */
1100 FALSE, /* partial_inplace */
1101 0, /* src_mask */
1102 0xffff, /* dst_mask */
1103 FALSE), /* pcrel_offset */
1104
1105 /* Like TPREL16_HI, but adjust for low 16 bits. */
1106 HOWTO (R_PPC_TPREL16_HA,
1107 16, /* rightshift */
1108 1, /* size (0 = byte, 1 = short, 2 = long) */
1109 16, /* bitsize */
1110 FALSE, /* pc_relative */
1111 0, /* bitpos */
1112 complain_overflow_dont, /* complain_on_overflow */
1113 ppc_elf_unhandled_reloc, /* special_function */
1114 "R_PPC_TPREL16_HA", /* name */
1115 FALSE, /* partial_inplace */
1116 0, /* src_mask */
1117 0xffff, /* dst_mask */
1118 FALSE), /* pcrel_offset */
1119
1120 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1121 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1122 to the first entry. */
1123 HOWTO (R_PPC_GOT_TLSGD16,
1124 0, /* rightshift */
1125 1, /* size (0 = byte, 1 = short, 2 = long) */
1126 16, /* bitsize */
1127 FALSE, /* pc_relative */
1128 0, /* bitpos */
1129 complain_overflow_signed, /* complain_on_overflow */
1130 ppc_elf_unhandled_reloc, /* special_function */
1131 "R_PPC_GOT_TLSGD16", /* name */
1132 FALSE, /* partial_inplace */
1133 0, /* src_mask */
1134 0xffff, /* dst_mask */
1135 FALSE), /* pcrel_offset */
1136
1137 /* Like GOT_TLSGD16, but no overflow. */
1138 HOWTO (R_PPC_GOT_TLSGD16_LO,
1139 0, /* rightshift */
1140 1, /* size (0 = byte, 1 = short, 2 = long) */
1141 16, /* bitsize */
1142 FALSE, /* pc_relative */
1143 0, /* bitpos */
1144 complain_overflow_dont, /* complain_on_overflow */
1145 ppc_elf_unhandled_reloc, /* special_function */
1146 "R_PPC_GOT_TLSGD16_LO", /* name */
1147 FALSE, /* partial_inplace */
1148 0, /* src_mask */
1149 0xffff, /* dst_mask */
1150 FALSE), /* pcrel_offset */
1151
1152 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1153 HOWTO (R_PPC_GOT_TLSGD16_HI,
1154 16, /* rightshift */
1155 1, /* size (0 = byte, 1 = short, 2 = long) */
1156 16, /* bitsize */
1157 FALSE, /* pc_relative */
1158 0, /* bitpos */
1159 complain_overflow_dont, /* complain_on_overflow */
1160 ppc_elf_unhandled_reloc, /* special_function */
1161 "R_PPC_GOT_TLSGD16_HI", /* name */
1162 FALSE, /* partial_inplace */
1163 0, /* src_mask */
1164 0xffff, /* dst_mask */
1165 FALSE), /* pcrel_offset */
1166
1167 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1168 HOWTO (R_PPC_GOT_TLSGD16_HA,
1169 16, /* rightshift */
1170 1, /* size (0 = byte, 1 = short, 2 = long) */
1171 16, /* bitsize */
1172 FALSE, /* pc_relative */
1173 0, /* bitpos */
1174 complain_overflow_dont, /* complain_on_overflow */
1175 ppc_elf_unhandled_reloc, /* special_function */
1176 "R_PPC_GOT_TLSGD16_HA", /* name */
1177 FALSE, /* partial_inplace */
1178 0, /* src_mask */
1179 0xffff, /* dst_mask */
1180 FALSE), /* pcrel_offset */
1181
1182 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1183 with values (sym+add)@dtpmod and zero, and computes the offset to the
1184 first entry. */
1185 HOWTO (R_PPC_GOT_TLSLD16,
1186 0, /* rightshift */
1187 1, /* size (0 = byte, 1 = short, 2 = long) */
1188 16, /* bitsize */
1189 FALSE, /* pc_relative */
1190 0, /* bitpos */
1191 complain_overflow_signed, /* complain_on_overflow */
1192 ppc_elf_unhandled_reloc, /* special_function */
1193 "R_PPC_GOT_TLSLD16", /* name */
1194 FALSE, /* partial_inplace */
1195 0, /* src_mask */
1196 0xffff, /* dst_mask */
1197 FALSE), /* pcrel_offset */
1198
1199 /* Like GOT_TLSLD16, but no overflow. */
1200 HOWTO (R_PPC_GOT_TLSLD16_LO,
1201 0, /* rightshift */
1202 1, /* size (0 = byte, 1 = short, 2 = long) */
1203 16, /* bitsize */
1204 FALSE, /* pc_relative */
1205 0, /* bitpos */
1206 complain_overflow_dont, /* complain_on_overflow */
1207 ppc_elf_unhandled_reloc, /* special_function */
1208 "R_PPC_GOT_TLSLD16_LO", /* name */
1209 FALSE, /* partial_inplace */
1210 0, /* src_mask */
1211 0xffff, /* dst_mask */
1212 FALSE), /* pcrel_offset */
1213
1214 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1215 HOWTO (R_PPC_GOT_TLSLD16_HI,
1216 16, /* rightshift */
1217 1, /* size (0 = byte, 1 = short, 2 = long) */
1218 16, /* bitsize */
1219 FALSE, /* pc_relative */
1220 0, /* bitpos */
1221 complain_overflow_dont, /* complain_on_overflow */
1222 ppc_elf_unhandled_reloc, /* special_function */
1223 "R_PPC_GOT_TLSLD16_HI", /* name */
1224 FALSE, /* partial_inplace */
1225 0, /* src_mask */
1226 0xffff, /* dst_mask */
1227 FALSE), /* pcrel_offset */
1228
1229 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1230 HOWTO (R_PPC_GOT_TLSLD16_HA,
1231 16, /* rightshift */
1232 1, /* size (0 = byte, 1 = short, 2 = long) */
1233 16, /* bitsize */
1234 FALSE, /* pc_relative */
1235 0, /* bitpos */
1236 complain_overflow_dont, /* complain_on_overflow */
1237 ppc_elf_unhandled_reloc, /* special_function */
1238 "R_PPC_GOT_TLSLD16_HA", /* name */
1239 FALSE, /* partial_inplace */
1240 0, /* src_mask */
1241 0xffff, /* dst_mask */
1242 FALSE), /* pcrel_offset */
1243
1244 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1245 the offset to the entry. */
1246 HOWTO (R_PPC_GOT_DTPREL16,
1247 0, /* rightshift */
1248 1, /* size (0 = byte, 1 = short, 2 = long) */
1249 16, /* bitsize */
1250 FALSE, /* pc_relative */
1251 0, /* bitpos */
1252 complain_overflow_signed, /* complain_on_overflow */
1253 ppc_elf_unhandled_reloc, /* special_function */
1254 "R_PPC_GOT_DTPREL16", /* name */
1255 FALSE, /* partial_inplace */
1256 0, /* src_mask */
1257 0xffff, /* dst_mask */
1258 FALSE), /* pcrel_offset */
1259
1260 /* Like GOT_DTPREL16, but no overflow. */
1261 HOWTO (R_PPC_GOT_DTPREL16_LO,
1262 0, /* rightshift */
1263 1, /* size (0 = byte, 1 = short, 2 = long) */
1264 16, /* bitsize */
1265 FALSE, /* pc_relative */
1266 0, /* bitpos */
1267 complain_overflow_dont, /* complain_on_overflow */
1268 ppc_elf_unhandled_reloc, /* special_function */
1269 "R_PPC_GOT_DTPREL16_LO", /* name */
1270 FALSE, /* partial_inplace */
1271 0, /* src_mask */
1272 0xffff, /* dst_mask */
1273 FALSE), /* pcrel_offset */
1274
1275 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1276 HOWTO (R_PPC_GOT_DTPREL16_HI,
1277 16, /* rightshift */
1278 1, /* size (0 = byte, 1 = short, 2 = long) */
1279 16, /* bitsize */
1280 FALSE, /* pc_relative */
1281 0, /* bitpos */
1282 complain_overflow_dont, /* complain_on_overflow */
1283 ppc_elf_unhandled_reloc, /* special_function */
1284 "R_PPC_GOT_DTPREL16_HI", /* name */
1285 FALSE, /* partial_inplace */
1286 0, /* src_mask */
1287 0xffff, /* dst_mask */
1288 FALSE), /* pcrel_offset */
1289
1290 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1291 HOWTO (R_PPC_GOT_DTPREL16_HA,
1292 16, /* rightshift */
1293 1, /* size (0 = byte, 1 = short, 2 = long) */
1294 16, /* bitsize */
1295 FALSE, /* pc_relative */
1296 0, /* bitpos */
1297 complain_overflow_dont, /* complain_on_overflow */
1298 ppc_elf_unhandled_reloc, /* special_function */
1299 "R_PPC_GOT_DTPREL16_HA", /* name */
1300 FALSE, /* partial_inplace */
1301 0, /* src_mask */
1302 0xffff, /* dst_mask */
1303 FALSE), /* pcrel_offset */
1304
1305 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1306 offset to the entry. */
1307 HOWTO (R_PPC_GOT_TPREL16,
1308 0, /* rightshift */
1309 1, /* size (0 = byte, 1 = short, 2 = long) */
1310 16, /* bitsize */
1311 FALSE, /* pc_relative */
1312 0, /* bitpos */
1313 complain_overflow_signed, /* complain_on_overflow */
1314 ppc_elf_unhandled_reloc, /* special_function */
1315 "R_PPC_GOT_TPREL16", /* name */
1316 FALSE, /* partial_inplace */
1317 0, /* src_mask */
1318 0xffff, /* dst_mask */
1319 FALSE), /* pcrel_offset */
1320
1321 /* Like GOT_TPREL16, but no overflow. */
1322 HOWTO (R_PPC_GOT_TPREL16_LO,
1323 0, /* rightshift */
1324 1, /* size (0 = byte, 1 = short, 2 = long) */
1325 16, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_dont, /* complain_on_overflow */
1329 ppc_elf_unhandled_reloc, /* special_function */
1330 "R_PPC_GOT_TPREL16_LO", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0xffff, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1337 HOWTO (R_PPC_GOT_TPREL16_HI,
1338 16, /* rightshift */
1339 1, /* size (0 = byte, 1 = short, 2 = long) */
1340 16, /* bitsize */
1341 FALSE, /* pc_relative */
1342 0, /* bitpos */
1343 complain_overflow_dont, /* complain_on_overflow */
1344 ppc_elf_unhandled_reloc, /* special_function */
1345 "R_PPC_GOT_TPREL16_HI", /* name */
1346 FALSE, /* partial_inplace */
1347 0, /* src_mask */
1348 0xffff, /* dst_mask */
1349 FALSE), /* pcrel_offset */
1350
1351 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1352 HOWTO (R_PPC_GOT_TPREL16_HA,
1353 16, /* rightshift */
1354 1, /* size (0 = byte, 1 = short, 2 = long) */
1355 16, /* bitsize */
1356 FALSE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_dont, /* complain_on_overflow */
1359 ppc_elf_unhandled_reloc, /* special_function */
1360 "R_PPC_GOT_TPREL16_HA", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 0xffff, /* dst_mask */
1364 FALSE), /* pcrel_offset */
1365
1366 /* The remaining relocs are from the Embedded ELF ABI, and are not
1367 in the SVR4 ELF ABI. */
1368
1369 /* 32 bit value resulting from the addend minus the symbol. */
1370 HOWTO (R_PPC_EMB_NADDR32, /* type */
1371 0, /* rightshift */
1372 2, /* size (0 = byte, 1 = short, 2 = long) */
1373 32, /* bitsize */
1374 FALSE, /* pc_relative */
1375 0, /* bitpos */
1376 complain_overflow_bitfield, /* complain_on_overflow */
1377 bfd_elf_generic_reloc, /* special_function */
1378 "R_PPC_EMB_NADDR32", /* name */
1379 FALSE, /* partial_inplace */
1380 0, /* src_mask */
1381 0xffffffff, /* dst_mask */
1382 FALSE), /* pcrel_offset */
1383
1384 /* 16 bit value resulting from the addend minus the symbol. */
1385 HOWTO (R_PPC_EMB_NADDR16, /* type */
1386 0, /* rightshift */
1387 1, /* size (0 = byte, 1 = short, 2 = long) */
1388 16, /* bitsize */
1389 FALSE, /* pc_relative */
1390 0, /* bitpos */
1391 complain_overflow_bitfield, /* complain_on_overflow */
1392 bfd_elf_generic_reloc, /* special_function */
1393 "R_PPC_EMB_NADDR16", /* name */
1394 FALSE, /* partial_inplace */
1395 0, /* src_mask */
1396 0xffff, /* dst_mask */
1397 FALSE), /* pcrel_offset */
1398
1399 /* 16 bit value resulting from the addend minus the symbol. */
1400 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1401 0, /* rightshift */
1402 1, /* size (0 = byte, 1 = short, 2 = long) */
1403 16, /* bitsize */
1404 FALSE, /* pc_relative */
1405 0, /* bitpos */
1406 complain_overflow_dont,/* complain_on_overflow */
1407 bfd_elf_generic_reloc, /* special_function */
1408 "R_PPC_EMB_ADDR16_LO", /* name */
1409 FALSE, /* partial_inplace */
1410 0, /* src_mask */
1411 0xffff, /* dst_mask */
1412 FALSE), /* pcrel_offset */
1413
1414 /* The high order 16 bits of the addend minus the symbol. */
1415 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1416 16, /* rightshift */
1417 1, /* size (0 = byte, 1 = short, 2 = long) */
1418 16, /* bitsize */
1419 FALSE, /* pc_relative */
1420 0, /* bitpos */
1421 complain_overflow_dont, /* complain_on_overflow */
1422 bfd_elf_generic_reloc, /* special_function */
1423 "R_PPC_EMB_NADDR16_HI", /* name */
1424 FALSE, /* partial_inplace */
1425 0, /* src_mask */
1426 0xffff, /* dst_mask */
1427 FALSE), /* pcrel_offset */
1428
1429 /* The high order 16 bits of the result of the addend minus the address,
1430 plus 1 if the contents of the low 16 bits, treated as a signed number,
1431 is negative. */
1432 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1433 16, /* rightshift */
1434 1, /* size (0 = byte, 1 = short, 2 = long) */
1435 16, /* bitsize */
1436 FALSE, /* pc_relative */
1437 0, /* bitpos */
1438 complain_overflow_dont, /* complain_on_overflow */
1439 ppc_elf_addr16_ha_reloc, /* special_function */
1440 "R_PPC_EMB_NADDR16_HA", /* name */
1441 FALSE, /* partial_inplace */
1442 0, /* src_mask */
1443 0xffff, /* dst_mask */
1444 FALSE), /* pcrel_offset */
1445
1446 /* 16 bit value resulting from allocating a 4 byte word to hold an
1447 address in the .sdata section, and returning the offset from
1448 _SDA_BASE_ for that relocation. */
1449 HOWTO (R_PPC_EMB_SDAI16, /* type */
1450 0, /* rightshift */
1451 1, /* size (0 = byte, 1 = short, 2 = long) */
1452 16, /* bitsize */
1453 FALSE, /* pc_relative */
1454 0, /* bitpos */
1455 complain_overflow_bitfield, /* complain_on_overflow */
1456 bfd_elf_generic_reloc, /* special_function */
1457 "R_PPC_EMB_SDAI16", /* name */
1458 FALSE, /* partial_inplace */
1459 0, /* src_mask */
1460 0xffff, /* dst_mask */
1461 FALSE), /* pcrel_offset */
1462
1463 /* 16 bit value resulting from allocating a 4 byte word to hold an
1464 address in the .sdata2 section, and returning the offset from
1465 _SDA2_BASE_ for that relocation. */
1466 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1467 0, /* rightshift */
1468 1, /* size (0 = byte, 1 = short, 2 = long) */
1469 16, /* bitsize */
1470 FALSE, /* pc_relative */
1471 0, /* bitpos */
1472 complain_overflow_bitfield, /* complain_on_overflow */
1473 bfd_elf_generic_reloc, /* special_function */
1474 "R_PPC_EMB_SDA2I16", /* name */
1475 FALSE, /* partial_inplace */
1476 0, /* src_mask */
1477 0xffff, /* dst_mask */
1478 FALSE), /* pcrel_offset */
1479
1480 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1481 small data items. */
1482 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1483 0, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_signed, /* complain_on_overflow */
1489 bfd_elf_generic_reloc, /* special_function */
1490 "R_PPC_EMB_SDA2REL", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1497 signed offset from the appropriate base, and filling in the register
1498 field with the appropriate register (0, 2, or 13). */
1499 HOWTO (R_PPC_EMB_SDA21, /* type */
1500 0, /* rightshift */
1501 2, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_signed, /* complain_on_overflow */
1506 bfd_elf_generic_reloc, /* special_function */
1507 "R_PPC_EMB_SDA21", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xffff, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Relocation not handled: R_PPC_EMB_MRKREF */
1514 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1515 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1516 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1517 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1518 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1519
1520 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1521 in the 16 bit signed offset from the appropriate base, and filling in the
1522 register field with the appropriate register (0, 2, or 13). */
1523 HOWTO (R_PPC_EMB_RELSDA, /* type */
1524 0, /* rightshift */
1525 1, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 TRUE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_signed, /* complain_on_overflow */
1530 bfd_elf_generic_reloc, /* special_function */
1531 "R_PPC_EMB_RELSDA", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0xffff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* Phony reloc to handle branch stubs. */
1538 HOWTO (R_PPC_RELAX32, /* type */
1539 0, /* rightshift */
1540 0, /* size */
1541 0, /* bitsize */
1542 FALSE, /* pc_relative */
1543 0, /* bitpos */
1544 complain_overflow_dont, /* complain_on_overflow */
1545 bfd_elf_generic_reloc, /* special_function */
1546 "R_PPC_RELAX32", /* name */
1547 FALSE, /* partial_inplace */
1548 0, /* src_mask */
1549 0, /* dst_mask */
1550 FALSE), /* pcrel_offset */
1551
1552 /* GNU extension to record C++ vtable hierarchy. */
1553 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1554 0, /* rightshift */
1555 0, /* size (0 = byte, 1 = short, 2 = long) */
1556 0, /* bitsize */
1557 FALSE, /* pc_relative */
1558 0, /* bitpos */
1559 complain_overflow_dont, /* complain_on_overflow */
1560 NULL, /* special_function */
1561 "R_PPC_GNU_VTINHERIT", /* name */
1562 FALSE, /* partial_inplace */
1563 0, /* src_mask */
1564 0, /* dst_mask */
1565 FALSE), /* pcrel_offset */
1566
1567 /* GNU extension to record C++ vtable member usage. */
1568 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1569 0, /* rightshift */
1570 0, /* size (0 = byte, 1 = short, 2 = long) */
1571 0, /* bitsize */
1572 FALSE, /* pc_relative */
1573 0, /* bitpos */
1574 complain_overflow_dont, /* complain_on_overflow */
1575 NULL, /* special_function */
1576 "R_PPC_GNU_VTENTRY", /* name */
1577 FALSE, /* partial_inplace */
1578 0, /* src_mask */
1579 0, /* dst_mask */
1580 FALSE), /* pcrel_offset */
1581
1582 /* Phony reloc to handle AIX style TOC entries. */
1583 HOWTO (R_PPC_TOC16, /* type */
1584 0, /* rightshift */
1585 1, /* size (0 = byte, 1 = short, 2 = long) */
1586 16, /* bitsize */
1587 FALSE, /* pc_relative */
1588 0, /* bitpos */
1589 complain_overflow_signed, /* complain_on_overflow */
1590 bfd_elf_generic_reloc, /* special_function */
1591 "R_PPC_TOC16", /* name */
1592 FALSE, /* partial_inplace */
1593 0, /* src_mask */
1594 0xffff, /* dst_mask */
1595 FALSE), /* pcrel_offset */
1596 };
1597 \f
1598 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1599
1600 static void
1601 ppc_elf_howto_init (void)
1602 {
1603 unsigned int i, type;
1604
1605 for (i = 0;
1606 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1607 i++)
1608 {
1609 type = ppc_elf_howto_raw[i].type;
1610 if (type >= (sizeof (ppc_elf_howto_table)
1611 / sizeof (ppc_elf_howto_table[0])))
1612 abort ();
1613 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1614 }
1615 }
1616 \f
1617 static bfd_reloc_status_type
1618 ppc_elf_install_value (bfd *abfd,
1619 bfd_byte *hit_addr,
1620 bfd_vma v,
1621 unsigned int r_type)
1622 {
1623 bfd_vma t0, t1;
1624 #ifdef BFD_HOST_U_64_BIT
1625 BFD_HOST_U_64_BIT val = (BFD_HOST_U_64_BIT) v;
1626 #else
1627 bfd_vma val = v;
1628 #endif
1629
1630 switch (r_type)
1631 {
1632 case R_PPC_RELAX32:
1633 /* Do stuff here. */
1634 t0 = bfd_get_32 (abfd, hit_addr);
1635 t1 = bfd_get_32 (abfd, hit_addr + 4);
1636
1637 /* We're clearing the bits for R_PPC_ADDR16_HA
1638 and R_PPC_ADDR16_LO here. */
1639 t0 &= ~0xffff;
1640 t1 &= ~0xffff;
1641
1642 /* t0 is HA, t1 is lo */
1643 t0 |= ((val + 0x8000) >> 16) & 0xffff;
1644 t1 |= val & 0xffff;
1645
1646 bfd_put_32 (abfd, t0, hit_addr);
1647 bfd_put_32 (abfd, t1, hit_addr + 4);
1648 break;
1649
1650 case R_PPC_REL24:
1651 t0 = bfd_get_32 (abfd, hit_addr);
1652 t0 &= ~0x3fffffc;
1653 t0 |= val & 0x3fffffc;
1654 bfd_put_32 (abfd, t0, hit_addr);
1655 break;
1656
1657 case R_PPC_REL14:
1658 case R_PPC_REL14_BRTAKEN:
1659 case R_PPC_REL14_BRNTAKEN:
1660 t0 = bfd_get_32 (abfd, hit_addr);
1661 t0 &= ~0xfffc;
1662 t0 |= val & 0xfffc;
1663 bfd_put_32 (abfd, t0, hit_addr);
1664 break;
1665
1666 case R_PPC_LOCAL24PC:
1667 case R_PPC_PLTREL24:
1668 t0 = bfd_get_32 (abfd, hit_addr);
1669 t0 &= ~0x3fffffc;
1670 t0 |= val & 0x3fffffc;
1671 bfd_put_32 (abfd, t0, hit_addr);
1672 break;
1673
1674 default:
1675 return bfd_reloc_notsupported;
1676 }
1677
1678 return bfd_reloc_ok;
1679 }
1680
1681 static const bfd_byte shared_stub_entry[] =
1682 {
1683 0x48, 0x00, 0x00, 0x24, /* b .+36 */
1684 0x7c, 0x08, 0x02, 0xa6, /* mflr 0 */
1685 0x42, 0x9f, 0x00, 0x05, /* bcl 20, 31, .Lxxx */
1686 0x7d, 0x68, 0x02, 0xa6, /* mflr 11 */
1687 0x3d, 0x60, 0x00, 0x00, /* addis 11, 11, (xxx-.Lxxx)@ha */
1688 0x39, 0x6b, 0x00, 0x18, /* addi 11, 11, (xxx-.Lxxx)@l */
1689 0x7c, 0x08, 0x03, 0xa6, /* mtlr 0 */
1690 0x7d, 0x69, 0x03, 0xa6, /* mtctr 11 */
1691 0x4e, 0x80, 0x04, 0x20, /* bctr */
1692 };
1693
1694 static const bfd_byte stub_entry[] =
1695 {
1696 0x48, 0x00, 0x00, 0x14, /* b .+20 */
1697 0x3d, 0x60, 0x00, 0x00, /* lis 11,xxx@ha */
1698 0x39, 0x6b, 0x00, 0x00, /* addi 11,11,xxx@l */
1699 0x7d, 0x69, 0x03, 0xa6, /* mtctr 11 */
1700 0x4e, 0x80, 0x04, 0x20, /* bctr */
1701 };
1702
1703
1704 static bfd_boolean
1705 ppc_elf_relax_section (bfd *abfd,
1706 asection *isec,
1707 struct bfd_link_info *link_info,
1708 bfd_boolean *again)
1709 {
1710 struct one_fixup
1711 {
1712 struct one_fixup *next;
1713 asection *tsec;
1714 bfd_vma toff;
1715 bfd_vma trampoff;
1716 };
1717
1718 Elf_Internal_Shdr *symtab_hdr;
1719 bfd_byte *contents = NULL;
1720 Elf_Internal_Sym *isymbuf = NULL;
1721 Elf_Internal_Rela *internal_relocs = NULL;
1722 Elf_Internal_Rela *irel, *irelend;
1723 struct one_fixup *fixups = NULL;
1724 bfd_boolean changed_contents = FALSE;
1725 bfd_boolean changed_relocs = FALSE;
1726 struct ppc_elf_link_hash_table *ppc_info;
1727
1728 *again = FALSE;
1729
1730 /* Nothing to do if there are no relocations and no need for
1731 the relax finalize pass. */
1732 if ((isec->flags & SEC_RELOC) == 0
1733 || isec->reloc_count == 0
1734 || link_info->relax_finalizing)
1735 return TRUE;
1736
1737 /* If needed, initialize this section's cooked size. */
1738 if (isec->_cooked_size == 0)
1739 isec->_cooked_size = isec->_raw_size;
1740
1741 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1742
1743 /* Get a copy of the native relocations. */
1744 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
1745 link_info->keep_memory);
1746 if (internal_relocs == NULL)
1747 goto error_return;
1748
1749 ppc_info = ppc_elf_hash_table (link_info);
1750 irelend = internal_relocs + isec->reloc_count;
1751
1752 /* Get the section contents. */
1753 /* Get cached copy if it exists. */
1754 if (elf_section_data (isec)->this_hdr.contents != NULL)
1755 contents = elf_section_data (isec)->this_hdr.contents;
1756 else
1757 {
1758 /* Go get them off disk. */
1759 contents = bfd_malloc (isec->_raw_size);
1760 if (contents == NULL)
1761 goto error_return;
1762
1763 if (!bfd_get_section_contents (abfd, isec, contents, 0, isec->_raw_size))
1764 goto error_return;
1765 }
1766
1767 for (irel = internal_relocs; irel < irelend; irel++)
1768 {
1769 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
1770 bfd_vma symaddr, reladdr, trampoff, toff, roff;
1771 asection *tsec;
1772 bfd_size_type amt;
1773 struct one_fixup *f;
1774 size_t insn_offset = 0;
1775 bfd_vma max_branch_offset;
1776
1777 switch (r_type)
1778 {
1779 case R_PPC_REL24:
1780 case R_PPC_LOCAL24PC:
1781 case R_PPC_REL14:
1782 case R_PPC_REL14_BRTAKEN:
1783 case R_PPC_REL14_BRNTAKEN:
1784 case R_PPC_PLTREL24:
1785 break;
1786
1787 default:
1788 continue;
1789 }
1790
1791 /* Get the value of the symbol referred to by the reloc. */
1792 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1793 {
1794 /* A local symbol. */
1795 Elf_Internal_Sym *isym;
1796
1797 /* Read this BFD's local symbols. */
1798 if (isymbuf == NULL)
1799 {
1800 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1801 if (isymbuf == NULL)
1802 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1803 symtab_hdr->sh_info, 0,
1804 NULL, NULL, NULL);
1805 if (isymbuf == 0)
1806 goto error_return;
1807 }
1808 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1809 if (isym->st_shndx == SHN_UNDEF)
1810 continue; /* We can't do anthing with undefined symbols. */
1811 else if (isym->st_shndx == SHN_ABS)
1812 tsec = bfd_abs_section_ptr;
1813 else if (isym->st_shndx == SHN_COMMON)
1814 tsec = bfd_com_section_ptr;
1815 else
1816 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1817
1818 toff = isym->st_value;
1819 }
1820 else
1821 {
1822 /* Need dynamic symbol handling. */
1823 unsigned long indx;
1824 struct elf_link_hash_entry *h;
1825
1826 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1827 h = elf_sym_hashes (abfd)[indx];
1828
1829 while (h->root.type == bfd_link_hash_indirect
1830 || h->root.type == bfd_link_hash_warning)
1831 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1832
1833 if (r_type == R_PPC_PLTREL24)
1834 {
1835 Elf_Internal_Sym *isym;
1836
1837 if (h->plt.offset == (bfd_vma) -1
1838 || ppc_info->plt == NULL)
1839 {
1840
1841 /* Read this BFD's local symbols. */
1842 if (isymbuf == NULL)
1843 {
1844 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1845 if (isymbuf == NULL)
1846 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1847 symtab_hdr->sh_info, 0,
1848 NULL, NULL, NULL);
1849 if (isymbuf == 0)
1850 goto error_return;
1851 }
1852 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1853
1854 if (isym->st_shndx == SHN_UNDEF)
1855 /* We can't do anthing with undefined symbols. */
1856 continue;
1857 else if (isym->st_shndx == SHN_ABS)
1858 tsec = bfd_abs_section_ptr;
1859 else if (isym->st_shndx == SHN_COMMON)
1860 tsec = bfd_com_section_ptr;
1861 else
1862 tsec = h->root.u.def.section;
1863
1864 toff = h->root.u.def.value;
1865 }
1866 else
1867 {
1868 tsec = ppc_info->plt;
1869 toff = h->plt.offset;
1870 }
1871 }
1872 else if (h->root.type == bfd_link_hash_undefined
1873 || h->root.type == bfd_link_hash_undefweak)
1874 continue;
1875
1876 else
1877 {
1878 tsec = h->root.u.def.section;
1879 toff = h->root.u.def.value;
1880 }
1881 }
1882
1883 if (tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
1884 toff = _bfd_merged_section_offset (abfd, &tsec,
1885 elf_section_data (tsec)->sec_info,
1886 toff + irel->r_addend, 0);
1887 else
1888 toff += irel->r_addend;
1889
1890 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
1891
1892 roff = irel->r_offset;
1893
1894 reladdr = (isec->output_section->vma
1895 + isec->output_offset
1896 + roff) & (bfd_vma) -4;
1897
1898 /* If the branch is in range, no need to do anything. */
1899 max_branch_offset = 1 << 25;
1900 if (r_type != R_PPC_REL24
1901 && r_type != R_PPC_LOCAL24PC
1902 && r_type != R_PPC_PLTREL24)
1903 max_branch_offset = 1 << 15;
1904
1905 if ((bfd_vma) (symaddr - reladdr) + max_branch_offset
1906 <= 2 * max_branch_offset)
1907 continue;
1908
1909 /* If the branch and target are in the same section, you have
1910 no hope. We'll error out later. */
1911 if (tsec == isec)
1912 continue;
1913
1914 /* Look for an existing fixup to this address. */
1915 for (f = fixups; f ; f = f->next)
1916 if (f->tsec == tsec && f->toff == toff)
1917 break;
1918
1919 if (f == NULL)
1920 {
1921 size_t size;
1922
1923 if (link_info->shared
1924 || tsec == ppc_info->plt
1925 || r_type == R_PPC_LOCAL24PC)
1926 {
1927 size = sizeof (shared_stub_entry);
1928 insn_offset = 16;
1929 }
1930 else
1931 {
1932 size = sizeof (stub_entry);
1933 insn_offset = 4;
1934 }
1935
1936 /* Resize the current section to make room for the new branch. */
1937 trampoff = (isec->_cooked_size + 3) & (bfd_vma) - 4;
1938 amt = trampoff + size;
1939 contents = bfd_realloc (contents, amt);
1940 if (contents == NULL)
1941 abort ();
1942
1943 isec->_cooked_size = amt;
1944
1945 if (link_info->shared
1946 || tsec == ppc_info->plt
1947 || r_type == R_PPC_LOCAL24PC)
1948 memcpy (contents + trampoff, shared_stub_entry, size);
1949 else
1950 memcpy (contents + trampoff, stub_entry, size);
1951
1952 /* Hijack the old relocation. Since we need two
1953 relocations for this use a "composite" reloc. */
1954 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1955 R_PPC_RELAX32);
1956 irel->r_offset = trampoff + insn_offset;
1957
1958 /* Record the fixup so we don't do it again this section. */
1959 f = bfd_malloc (sizeof (*f));
1960 f->next = fixups;
1961 f->tsec = tsec;
1962 f->toff = toff;
1963 f->trampoff = trampoff;
1964 fixups = f;
1965 }
1966 else
1967 {
1968 /* Nop out the reloc, since we're finalizing things here. */
1969 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
1970 }
1971
1972 /* Fix up the existing branch to hit the trampoline. Hope like
1973 hell this doesn't overflow too. */
1974 if (ppc_elf_install_value (abfd, contents + roff,
1975 f->trampoff - (roff & (bfd_vma) -3) + 4,
1976 r_type) != bfd_reloc_ok)
1977 abort ();
1978
1979 changed_contents = TRUE;
1980 changed_relocs = TRUE;
1981 }
1982
1983 /* Clean up. */
1984 while (fixups)
1985 {
1986 struct one_fixup *f = fixups;
1987 fixups = fixups->next;
1988 free (f);
1989 }
1990 if (isymbuf != NULL
1991 && symtab_hdr->contents != (unsigned char *) isymbuf)
1992 {
1993 if (! link_info->keep_memory)
1994 free (isymbuf);
1995 else
1996 {
1997 /* Cache the symbols for elf_link_input_bfd. */
1998 symtab_hdr->contents = (unsigned char *) isymbuf;
1999 }
2000 }
2001
2002 if (contents != NULL
2003 && elf_section_data (isec)->this_hdr.contents != contents)
2004 {
2005 if (!changed_contents && !link_info->keep_memory)
2006 free (contents);
2007 else
2008 {
2009 /* Cache the section contents for elf_link_input_bfd. */
2010 elf_section_data (isec)->this_hdr.contents = contents;
2011 }
2012 }
2013
2014 if (elf_section_data (isec)->relocs != internal_relocs)
2015 {
2016 if (!changed_relocs)
2017 free (internal_relocs);
2018 else
2019 elf_section_data (isec)->relocs = internal_relocs;
2020 }
2021
2022 *again = changed_contents || changed_relocs;
2023 return TRUE;
2024
2025 error_return:
2026 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
2027 free (isymbuf);
2028 if (contents != NULL
2029 && elf_section_data (isec)->this_hdr.contents != contents)
2030 free (contents);
2031 if (internal_relocs != NULL
2032 && elf_section_data (isec)->relocs != internal_relocs)
2033 free (internal_relocs);
2034 return FALSE;
2035 }
2036 \f
2037 static reloc_howto_type *
2038 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2039 bfd_reloc_code_real_type code)
2040 {
2041 enum elf_ppc_reloc_type r;
2042
2043 /* Initialize howto table if not already done. */
2044 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2045 ppc_elf_howto_init ();
2046
2047 switch (code)
2048 {
2049 default:
2050 return NULL;
2051
2052 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
2053 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
2054 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
2055 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
2056 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
2057 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
2058 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
2059 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
2060 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
2061 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
2062 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
2063 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
2064 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
2065 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
2066 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
2067 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
2068 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
2069 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
2070 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
2071 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
2072 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
2073 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
2074 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
2075 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
2076 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
2077 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
2078 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
2079 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
2080 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
2081 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
2082 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
2083 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
2084 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
2085 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
2086 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
2087 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
2088 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
2089 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
2090 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
2091 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
2092 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
2093 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
2094 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
2095 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
2096 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
2097 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
2098 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
2099 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
2100 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
2101 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
2102 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
2103 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
2104 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
2105 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
2106 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
2107 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
2108 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
2109 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
2110 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
2111 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
2112 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
2113 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
2114 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
2115 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
2116 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
2117 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
2118 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
2119 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
2120 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
2121 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
2122 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
2123 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
2124 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
2125 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
2126 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
2127 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
2128 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
2129 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
2130 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
2131 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2132 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2133 }
2134
2135 return ppc_elf_howto_table[r];
2136 };
2137
2138 /* Set the howto pointer for a PowerPC ELF reloc. */
2139
2140 static void
2141 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2142 arelent *cache_ptr,
2143 Elf_Internal_Rela *dst)
2144 {
2145 /* Initialize howto table if not already done. */
2146 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2147 ppc_elf_howto_init ();
2148
2149 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2150 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2151 }
2152
2153 /* Handle the R_PPC_ADDR16_HA reloc. */
2154
2155 static bfd_reloc_status_type
2156 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2157 arelent *reloc_entry,
2158 asymbol *symbol,
2159 void *data ATTRIBUTE_UNUSED,
2160 asection *input_section,
2161 bfd *output_bfd,
2162 char **error_message ATTRIBUTE_UNUSED)
2163 {
2164 bfd_vma relocation;
2165
2166 if (output_bfd != NULL)
2167 {
2168 reloc_entry->address += input_section->output_offset;
2169 return bfd_reloc_ok;
2170 }
2171
2172 if (reloc_entry->address > input_section->_cooked_size)
2173 return bfd_reloc_outofrange;
2174
2175 if (bfd_is_com_section (symbol->section))
2176 relocation = 0;
2177 else
2178 relocation = symbol->value;
2179
2180 relocation += symbol->section->output_section->vma;
2181 relocation += symbol->section->output_offset;
2182 relocation += reloc_entry->addend;
2183
2184 reloc_entry->addend += (relocation & 0x8000) << 1;
2185
2186 return bfd_reloc_continue;
2187 }
2188
2189 static bfd_reloc_status_type
2190 ppc_elf_unhandled_reloc (bfd *abfd,
2191 arelent *reloc_entry,
2192 asymbol *symbol,
2193 void *data,
2194 asection *input_section,
2195 bfd *output_bfd,
2196 char **error_message)
2197 {
2198 /* If this is a relocatable link (output_bfd test tells us), just
2199 call the generic function. Any adjustment will be done at final
2200 link time. */
2201 if (output_bfd != NULL)
2202 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2203 input_section, output_bfd, error_message);
2204
2205 if (error_message != NULL)
2206 {
2207 static char buf[60];
2208 sprintf (buf, _("generic linker can't handle %s"),
2209 reloc_entry->howto->name);
2210 *error_message = buf;
2211 }
2212 return bfd_reloc_dangerous;
2213 }
2214
2215 /* Fix bad default arch selected for a 32 bit input bfd when the
2216 default is 64 bit. */
2217
2218 static bfd_boolean
2219 ppc_elf_object_p (bfd *abfd)
2220 {
2221 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2222 {
2223 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2224
2225 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2226 {
2227 /* Relies on arch after 64 bit default being 32 bit default. */
2228 abfd->arch_info = abfd->arch_info->next;
2229 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2230 }
2231 }
2232 return TRUE;
2233 }
2234
2235 /* Function to set whether a module needs the -mrelocatable bit set. */
2236
2237 static bfd_boolean
2238 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2239 {
2240 BFD_ASSERT (!elf_flags_init (abfd)
2241 || elf_elfheader (abfd)->e_flags == flags);
2242
2243 elf_elfheader (abfd)->e_flags = flags;
2244 elf_flags_init (abfd) = TRUE;
2245 return TRUE;
2246 }
2247
2248 /* Merge backend specific data from an object file to the output
2249 object file when linking. */
2250
2251 static bfd_boolean
2252 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2253 {
2254 flagword old_flags;
2255 flagword new_flags;
2256 bfd_boolean error;
2257
2258 /* Check if we have the same endianess. */
2259 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
2260 return FALSE;
2261
2262 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2263 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2264 return TRUE;
2265
2266 new_flags = elf_elfheader (ibfd)->e_flags;
2267 old_flags = elf_elfheader (obfd)->e_flags;
2268 if (!elf_flags_init (obfd))
2269 {
2270 /* First call, no flags set. */
2271 elf_flags_init (obfd) = TRUE;
2272 elf_elfheader (obfd)->e_flags = new_flags;
2273 }
2274
2275 /* Compatible flags are ok. */
2276 else if (new_flags == old_flags)
2277 ;
2278
2279 /* Incompatible flags. */
2280 else
2281 {
2282 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
2283 to be linked with either. */
2284 error = FALSE;
2285 if ((new_flags & EF_PPC_RELOCATABLE) != 0
2286 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
2287 {
2288 error = TRUE;
2289 (*_bfd_error_handler)
2290 (_("%s: compiled with -mrelocatable and linked with "
2291 "modules compiled normally"),
2292 bfd_archive_filename (ibfd));
2293 }
2294 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
2295 && (old_flags & EF_PPC_RELOCATABLE) != 0)
2296 {
2297 error = TRUE;
2298 (*_bfd_error_handler)
2299 (_("%s: compiled normally and linked with "
2300 "modules compiled with -mrelocatable"),
2301 bfd_archive_filename (ibfd));
2302 }
2303
2304 /* The output is -mrelocatable-lib iff both the input files are. */
2305 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
2306 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
2307
2308 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
2309 but each input file is either -mrelocatable or -mrelocatable-lib. */
2310 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
2311 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
2312 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
2313 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
2314
2315 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
2316 any module uses it. */
2317 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
2318
2319 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2320 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2321
2322 /* Warn about any other mismatches. */
2323 if (new_flags != old_flags)
2324 {
2325 error = TRUE;
2326 (*_bfd_error_handler)
2327 (_("%s: uses different e_flags (0x%lx) fields "
2328 "than previous modules (0x%lx)"),
2329 bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
2330 }
2331
2332 if (error)
2333 {
2334 bfd_set_error (bfd_error_bad_value);
2335 return FALSE;
2336 }
2337 }
2338
2339 return TRUE;
2340 }
2341 \f
2342 /* Handle a PowerPC specific section when reading an object file. This
2343 is called when elfcode.h finds a section with an unknown type. */
2344
2345 static bfd_boolean
2346 ppc_elf_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, const char *name)
2347 {
2348 asection *newsect;
2349 flagword flags;
2350
2351 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2352 return FALSE;
2353
2354 newsect = hdr->bfd_section;
2355 flags = bfd_get_section_flags (abfd, newsect);
2356 if (hdr->sh_flags & SHF_EXCLUDE)
2357 flags |= SEC_EXCLUDE;
2358
2359 if (hdr->sh_type == SHT_ORDERED)
2360 flags |= SEC_SORT_ENTRIES;
2361
2362 bfd_set_section_flags (abfd, newsect, flags);
2363 return TRUE;
2364 }
2365 \f
2366 /* Set up any other section flags and such that may be necessary. */
2367
2368 static bfd_boolean
2369 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2370 Elf_Internal_Shdr *shdr,
2371 asection *asect)
2372 {
2373 if ((asect->flags & SEC_EXCLUDE) != 0)
2374 shdr->sh_flags |= SHF_EXCLUDE;
2375
2376 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2377 shdr->sh_type = SHT_ORDERED;
2378
2379 return TRUE;
2380 }
2381 \f
2382 /* Find a linker generated pointer with a given addend and type. */
2383
2384 static elf_linker_section_pointers_t *
2385 elf_find_pointer_linker_section
2386 (elf_linker_section_pointers_t *linker_pointers,
2387 bfd_vma addend,
2388 elf_linker_section_t *lsect)
2389 {
2390 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2391 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2392 return linker_pointers;
2393
2394 return NULL;
2395 }
2396 \f
2397 /* Allocate a pointer to live in a linker created section. */
2398
2399 static bfd_boolean
2400 elf_create_pointer_linker_section (bfd *abfd,
2401 struct bfd_link_info *info,
2402 elf_linker_section_t *lsect,
2403 struct elf_link_hash_entry *h,
2404 const Elf_Internal_Rela *rel)
2405 {
2406 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2407 elf_linker_section_pointers_t *linker_section_ptr;
2408 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2409 bfd_size_type amt;
2410
2411 BFD_ASSERT (lsect != NULL);
2412
2413 /* Is this a global symbol? */
2414 if (h != NULL)
2415 {
2416 struct ppc_elf_link_hash_entry *eh;
2417
2418 /* Has this symbol already been allocated? If so, our work is done. */
2419 eh = (struct ppc_elf_link_hash_entry *) h;
2420 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2421 rel->r_addend,
2422 lsect))
2423 return TRUE;
2424
2425 ptr_linker_section_ptr = &eh->linker_section_pointer;
2426 /* Make sure this symbol is output as a dynamic symbol. */
2427 if (h->dynindx == -1)
2428 {
2429 if (! _bfd_elf_link_record_dynamic_symbol (info, h))
2430 return FALSE;
2431 }
2432
2433 if (lsect->rel_section)
2434 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
2435 }
2436 else
2437 {
2438 /* Allocation of a pointer to a local symbol. */
2439 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2440
2441 /* Allocate a table to hold the local symbols if first time. */
2442 if (!ptr)
2443 {
2444 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2445
2446 amt = num_symbols;
2447 amt *= sizeof (elf_linker_section_pointers_t *);
2448 ptr = bfd_zalloc (abfd, amt);
2449
2450 if (!ptr)
2451 return FALSE;
2452
2453 elf_local_ptr_offsets (abfd) = ptr;
2454 }
2455
2456 /* Has this symbol already been allocated? If so, our work is done. */
2457 if (elf_find_pointer_linker_section (ptr[r_symndx],
2458 rel->r_addend,
2459 lsect))
2460 return TRUE;
2461
2462 ptr_linker_section_ptr = &ptr[r_symndx];
2463
2464 if (info->shared)
2465 {
2466 /* If we are generating a shared object, we need to
2467 output a R_<xxx>_RELATIVE reloc so that the
2468 dynamic linker can adjust this GOT entry. */
2469 BFD_ASSERT (lsect->rel_section != NULL);
2470 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
2471 }
2472 }
2473
2474 /* Allocate space for a pointer in the linker section, and allocate
2475 a new pointer record from internal memory. */
2476 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2477 amt = sizeof (elf_linker_section_pointers_t);
2478 linker_section_ptr = bfd_alloc (abfd, amt);
2479
2480 if (!linker_section_ptr)
2481 return FALSE;
2482
2483 linker_section_ptr->next = *ptr_linker_section_ptr;
2484 linker_section_ptr->addend = rel->r_addend;
2485 linker_section_ptr->lsect = lsect;
2486 linker_section_ptr->written_address_p = FALSE;
2487 *ptr_linker_section_ptr = linker_section_ptr;
2488
2489 linker_section_ptr->offset = lsect->section->_raw_size;
2490 lsect->section->_raw_size += 4;
2491
2492 #ifdef DEBUG
2493 fprintf (stderr,
2494 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2495 lsect->name, (long) linker_section_ptr->offset,
2496 (long) lsect->section->_raw_size);
2497 #endif
2498
2499 return TRUE;
2500 }
2501 \f
2502 #define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR)
2503
2504 /* Fill in the address for a pointer generated in a linker section. */
2505
2506 static bfd_vma
2507 elf_finish_pointer_linker_section (bfd *output_bfd,
2508 bfd *input_bfd,
2509 struct bfd_link_info *info,
2510 elf_linker_section_t *lsect,
2511 struct elf_link_hash_entry *h,
2512 bfd_vma relocation,
2513 const Elf_Internal_Rela *rel,
2514 int relative_reloc)
2515 {
2516 elf_linker_section_pointers_t *linker_section_ptr;
2517
2518 BFD_ASSERT (lsect != NULL);
2519
2520 if (h != NULL)
2521 {
2522 /* Handle global symbol. */
2523 struct ppc_elf_link_hash_entry *eh;
2524
2525 eh = (struct ppc_elf_link_hash_entry *) h;
2526 linker_section_ptr
2527 = elf_find_pointer_linker_section (eh->linker_section_pointer,
2528 rel->r_addend,
2529 lsect);
2530
2531 BFD_ASSERT (linker_section_ptr != NULL);
2532
2533 if (! elf_hash_table (info)->dynamic_sections_created
2534 || (info->shared
2535 && info->symbolic
2536 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
2537 {
2538 /* This is actually a static link, or it is a
2539 -Bsymbolic link and the symbol is defined
2540 locally. We must initialize this entry in the
2541 global section.
2542
2543 When doing a dynamic link, we create a .rela.<xxx>
2544 relocation entry to initialize the value. This
2545 is done in the finish_dynamic_symbol routine. */
2546 if (!linker_section_ptr->written_address_p)
2547 {
2548 linker_section_ptr->written_address_p = TRUE;
2549 bfd_put_ptr (output_bfd,
2550 relocation + linker_section_ptr->addend,
2551 (lsect->section->contents
2552 + linker_section_ptr->offset));
2553 }
2554 }
2555 }
2556 else
2557 {
2558 /* Handle local symbol. */
2559 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2560 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
2561 BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
2562 linker_section_ptr = (elf_find_pointer_linker_section
2563 (elf_local_ptr_offsets (input_bfd)[r_symndx],
2564 rel->r_addend,
2565 lsect));
2566
2567 BFD_ASSERT (linker_section_ptr != NULL);
2568
2569 /* Write out pointer if it hasn't been rewritten out before. */
2570 if (!linker_section_ptr->written_address_p)
2571 {
2572 linker_section_ptr->written_address_p = TRUE;
2573 bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
2574 lsect->section->contents + linker_section_ptr->offset);
2575
2576 if (info->shared)
2577 {
2578 /* We need to generate a relative reloc for the dynamic
2579 linker. */
2580
2581 asection *srel = lsect->rel_section;
2582 Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL];
2583 bfd_byte *erel;
2584 const struct elf_backend_data *bed;
2585 unsigned int i;
2586
2587 BFD_ASSERT (srel != NULL);
2588
2589 bed = get_elf_backend_data (output_bfd);
2590 for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
2591 {
2592 outrel[i].r_offset = (lsect->section->output_section->vma
2593 + lsect->section->output_offset
2594 + linker_section_ptr->offset);
2595 outrel[i].r_info = 0;
2596 outrel[i].r_addend = 0;
2597 }
2598 outrel[0].r_info = ELF32_R_INFO (0, relative_reloc);
2599 erel = lsect->section->contents;
2600 erel += (elf_section_data (lsect->section)->rel_count++
2601 * sizeof (Elf32_External_Rela));
2602 bfd_elf32_swap_reloca_out (output_bfd, outrel, erel);
2603 }
2604 }
2605 }
2606
2607 relocation = (lsect->section->output_offset
2608 + linker_section_ptr->offset
2609 - lsect->sym_offset);
2610
2611 #ifdef DEBUG
2612 fprintf (stderr,
2613 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
2614 lsect->name, (long) relocation, (long) relocation);
2615 #endif
2616
2617 /* Subtract out the addend, because it will get added back in by the normal
2618 processing. */
2619 return relocation - linker_section_ptr->addend;
2620 }
2621 \f
2622 /* Create a special linker section */
2623 static elf_linker_section_t *
2624 ppc_elf_create_linker_section (bfd *abfd,
2625 struct bfd_link_info *info,
2626 enum elf_linker_section_enum which)
2627 {
2628 elf_linker_section_t *lsect;
2629 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2630 asection *s;
2631 bfd_size_type amt;
2632 flagword flags;
2633 const char *name;
2634 const char *rel_name;
2635 const char *sym_name;
2636 bfd_vma sym_offset;
2637
2638 /* Both of these sections are (technically) created by the user
2639 putting data in them, so they shouldn't be marked
2640 SEC_LINKER_CREATED.
2641
2642 The linker creates them so it has somewhere to attach their
2643 respective symbols. In fact, if they were empty it would
2644 be OK to leave the symbol set to 0 (or any random number), because
2645 the appropriate register should never be used. */
2646 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
2647 sym_offset = 32768;
2648
2649 switch (which)
2650 {
2651 default:
2652 abort ();
2653 return NULL;
2654
2655 case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
2656 name = ".sdata";
2657 rel_name = ".rela.sdata";
2658 sym_name = "_SDA_BASE_";
2659 break;
2660
2661 case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
2662 name = ".sdata2";
2663 rel_name = ".rela.sdata2";
2664 sym_name = "_SDA2_BASE_";
2665 flags |= SEC_READONLY;
2666 break;
2667 }
2668
2669 /* Record the first bfd that needs the special sections. */
2670 if (!htab->elf.dynobj)
2671 htab->elf.dynobj = abfd;
2672
2673 amt = sizeof (elf_linker_section_t);
2674 lsect = bfd_zalloc (htab->elf.dynobj, amt);
2675
2676 lsect->sym_offset = sym_offset;
2677
2678 /* See if the sections already exist. */
2679 s = bfd_get_section_by_name (htab->elf.dynobj, name);
2680 if (s == NULL || (s->flags & flags) != flags)
2681 {
2682 s = bfd_make_section_anyway (htab->elf.dynobj, name);
2683 if (s == NULL
2684 || !bfd_set_section_flags (htab->elf.dynobj, s, flags))
2685 return NULL;
2686 }
2687 lsect->section = s;
2688
2689 if (bfd_get_section_alignment (htab->elf.dynobj, s) < 2
2690 && !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2691 return NULL;
2692
2693 s->_raw_size = align_power (s->_raw_size, 2);
2694
2695 #ifdef DEBUG
2696 fprintf (stderr, "Creating section %s, current size = %ld\n",
2697 name, (long) s->_raw_size);
2698 #endif
2699
2700 if (sym_name)
2701 {
2702 struct elf_link_hash_entry *h;
2703 struct bfd_link_hash_entry *bh;
2704
2705 #ifdef DEBUG
2706 fprintf (stderr, "Adding %s to section %s\n", sym_name, name);
2707 #endif
2708 bh = bfd_link_hash_lookup (info->hash, sym_name,
2709 FALSE, FALSE, FALSE);
2710
2711 if ((bh == NULL || bh->type == bfd_link_hash_undefined)
2712 && !(_bfd_generic_link_add_one_symbol
2713 (info, abfd, sym_name, BSF_GLOBAL, s, sym_offset, NULL,
2714 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
2715 return NULL;
2716 h = (struct elf_link_hash_entry *) bh;
2717
2718 h->type = STT_OBJECT;
2719 lsect->sym_hash = h;
2720
2721 if (info->shared
2722 && ! _bfd_elf_link_record_dynamic_symbol (info, h))
2723 return NULL;
2724 }
2725
2726 if (info->shared)
2727 {
2728 s = bfd_make_section_anyway (htab->elf.dynobj, rel_name);
2729 lsect->rel_section = s;
2730 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2731 | SEC_LINKER_CREATED | SEC_READONLY);
2732 if (s == NULL
2733 || ! bfd_set_section_flags (htab->elf.dynobj, s, flags)
2734 || ! bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2735 return NULL;
2736 }
2737
2738 return lsect;
2739 }
2740 \f
2741 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
2742 need to bump up the number of section headers. */
2743
2744 static int
2745 ppc_elf_additional_program_headers (bfd *abfd)
2746 {
2747 asection *s;
2748 int ret;
2749
2750 ret = 0;
2751
2752 s = bfd_get_section_by_name (abfd, ".interp");
2753 if (s != NULL)
2754 ++ret;
2755
2756 s = bfd_get_section_by_name (abfd, ".sbss2");
2757 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2758 ++ret;
2759
2760 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2761 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2762 ++ret;
2763
2764 return ret;
2765 }
2766
2767 /* Modify the segment map if needed. */
2768
2769 static bfd_boolean
2770 ppc_elf_modify_segment_map (bfd *abfd ATTRIBUTE_UNUSED)
2771 {
2772 return TRUE;
2773 }
2774 \f
2775 /* The powerpc .got has a blrl instruction in it. Mark it executable. */
2776
2777 static bfd_boolean
2778 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2779 {
2780 struct ppc_elf_link_hash_table *htab;
2781 asection *s;
2782 flagword flags;
2783
2784 if (!_bfd_elf_create_got_section (abfd, info))
2785 return FALSE;
2786
2787 htab = ppc_elf_hash_table (info);
2788 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2789 if (s == NULL)
2790 abort ();
2791
2792 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2793 | SEC_LINKER_CREATED);
2794 if (!bfd_set_section_flags (abfd, s, flags))
2795 return FALSE;
2796
2797 htab->relgot = bfd_make_section (abfd, ".rela.got");
2798 if (!htab->relgot
2799 || ! bfd_set_section_flags (abfd, htab->relgot,
2800 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2801 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2802 | SEC_READONLY))
2803 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2804 return FALSE;
2805
2806 return TRUE;
2807 }
2808
2809 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2810 to output sections (just like _bfd_elf_create_dynamic_sections has
2811 to create .dynbss and .rela.bss). */
2812
2813 static bfd_boolean
2814 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2815 {
2816 struct ppc_elf_link_hash_table *htab;
2817 asection *s;
2818 flagword flags;
2819
2820 htab = ppc_elf_hash_table (info);
2821
2822 if (htab->got == NULL
2823 && !ppc_elf_create_got (abfd, info))
2824 return FALSE;
2825
2826 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2827 return FALSE;
2828
2829 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2830 | SEC_LINKER_CREATED);
2831
2832 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2833 htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
2834 if (s == NULL
2835 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
2836 return FALSE;
2837
2838 if (! info->shared)
2839 {
2840 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2841 htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss");
2842 if (s == NULL
2843 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
2844 || ! bfd_set_section_alignment (abfd, s, 2))
2845 return FALSE;
2846 }
2847
2848 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2849 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2850 if (s == NULL)
2851 abort ();
2852
2853 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
2854 return bfd_set_section_flags (abfd, s, flags);
2855 }
2856
2857 /* Adjust a symbol defined by a dynamic object and referenced by a
2858 regular object. The current definition is in some section of the
2859 dynamic object, but we're not including those sections. We have to
2860 change the definition to something the rest of the link can
2861 understand. */
2862
2863 static bfd_boolean
2864 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2865 struct elf_link_hash_entry *h)
2866 {
2867 struct ppc_elf_link_hash_table *htab;
2868 asection *s;
2869 unsigned int power_of_two;
2870
2871 #ifdef DEBUG
2872 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
2873 h->root.root.string);
2874 #endif
2875
2876 /* Make sure we know what is going on here. */
2877 htab = ppc_elf_hash_table (info);
2878 BFD_ASSERT (htab->elf.dynobj != NULL
2879 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2880 || h->weakdef != NULL
2881 || ((h->elf_link_hash_flags
2882 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2883 && (h->elf_link_hash_flags
2884 & ELF_LINK_HASH_REF_REGULAR) != 0
2885 && (h->elf_link_hash_flags
2886 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2887
2888 /* Deal with function syms. */
2889 if (h->type == STT_FUNC
2890 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2891 {
2892 /* Clear procedure linkage table information for any symbol that
2893 won't need a .plt entry. */
2894 if (h->plt.refcount <= 0
2895 || SYMBOL_CALLS_LOCAL (info, h)
2896 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2897 && h->root.type == bfd_link_hash_undefweak))
2898 {
2899 /* A PLT entry is not required/allowed when:
2900
2901 1. We are not using ld.so; because then the PLT entry
2902 can't be set up, so we can't use one. In this case,
2903 ppc_elf_adjust_dynamic_symbol won't even be called.
2904
2905 2. GC has rendered the entry unused.
2906
2907 3. We know for certain that a call to this symbol
2908 will go to this object, or will remain undefined. */
2909 h->plt.offset = (bfd_vma) -1;
2910 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2911 }
2912 return TRUE;
2913 }
2914 else
2915 h->plt.offset = (bfd_vma) -1;
2916
2917 /* If this is a weak symbol, and there is a real definition, the
2918 processor independent code will have arranged for us to see the
2919 real definition first, and we can just use the same value. */
2920 if (h->weakdef != NULL)
2921 {
2922 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2923 || h->weakdef->root.type == bfd_link_hash_defweak);
2924 h->root.u.def.section = h->weakdef->root.u.def.section;
2925 h->root.u.def.value = h->weakdef->root.u.def.value;
2926 if (ELIMINATE_COPY_RELOCS)
2927 h->elf_link_hash_flags
2928 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
2929 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
2930 return TRUE;
2931 }
2932
2933 /* This is a reference to a symbol defined by a dynamic object which
2934 is not a function. */
2935
2936 /* If we are creating a shared library, we must presume that the
2937 only references to the symbol are via the global offset table.
2938 For such cases we need not do anything here; the relocations will
2939 be handled correctly by relocate_section. */
2940 if (info->shared)
2941 return TRUE;
2942
2943 /* If there are no references to this symbol that do not use the
2944 GOT, we don't need to generate a copy reloc. */
2945 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
2946 return TRUE;
2947
2948 if (ELIMINATE_COPY_RELOCS)
2949 {
2950 struct ppc_elf_dyn_relocs *p;
2951 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
2952 {
2953 s = p->sec->output_section;
2954 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2955 break;
2956 }
2957
2958 /* If we didn't find any dynamic relocs in read-only sections, then
2959 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2960 if (p == NULL)
2961 {
2962 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
2963 return TRUE;
2964 }
2965 }
2966
2967 /* We must allocate the symbol in our .dynbss section, which will
2968 become part of the .bss section of the executable. There will be
2969 an entry for this symbol in the .dynsym section. The dynamic
2970 object will contain position independent code, so all references
2971 from the dynamic object to this symbol will go through the global
2972 offset table. The dynamic linker will use the .dynsym entry to
2973 determine the address it must put in the global offset table, so
2974 both the dynamic object and the regular object will refer to the
2975 same memory location for the variable.
2976
2977 Of course, if the symbol is sufficiently small, we must instead
2978 allocate it in .sbss. FIXME: It would be better to do this if and
2979 only if there were actually SDAREL relocs for that symbol. */
2980
2981 if (h->size <= elf_gp_size (htab->elf.dynobj))
2982 s = htab->dynsbss;
2983 else
2984 s = htab->dynbss;
2985 BFD_ASSERT (s != NULL);
2986
2987 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
2988 copy the initial value out of the dynamic object and into the
2989 runtime process image. We need to remember the offset into the
2990 .rela.bss section we are going to use. */
2991 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2992 {
2993 asection *srel;
2994
2995 if (h->size <= elf_gp_size (htab->elf.dynobj))
2996 srel = htab->relsbss;
2997 else
2998 srel = htab->relbss;
2999 BFD_ASSERT (srel != NULL);
3000 srel->_raw_size += sizeof (Elf32_External_Rela);
3001 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
3002 }
3003
3004 /* We need to figure out the alignment required for this symbol. I
3005 have no idea how ELF linkers handle this. */
3006 power_of_two = bfd_log2 (h->size);
3007 if (power_of_two > 4)
3008 power_of_two = 4;
3009
3010 /* Apply the required alignment. */
3011 s->_raw_size = BFD_ALIGN (s->_raw_size,
3012 (bfd_size_type) (1 << power_of_two));
3013 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
3014 {
3015 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
3016 return FALSE;
3017 }
3018
3019 /* Define the symbol as being at this point in the section. */
3020 h->root.u.def.section = s;
3021 h->root.u.def.value = s->_raw_size;
3022
3023 /* Increment the section size to make room for the symbol. */
3024 s->_raw_size += h->size;
3025
3026 return TRUE;
3027 }
3028 \f
3029 /* This is the condition under which finish_dynamic_symbol will be
3030 called from elflink.h. If elflink.h doesn't call our
3031 finish_dynamic_symbol routine, we'll need to do something about
3032 initializing any .plt and .got entries in relocate_section. */
3033 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
3034 ((DYN) \
3035 && ((SHARED) \
3036 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
3037 && ((H)->dynindx != -1 \
3038 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
3039
3040 /* Of those relocs that might be copied as dynamic relocs, this macro
3041 selects those that must be copied when linking a shared library,
3042 even when the symbol is local. */
3043
3044 #define MUST_BE_DYN_RELOC(RTYPE) \
3045 ((RTYPE) != R_PPC_REL24 \
3046 && (RTYPE) != R_PPC_REL14 \
3047 && (RTYPE) != R_PPC_REL14_BRTAKEN \
3048 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
3049 && (RTYPE) != R_PPC_REL32)
3050
3051 /* Allocate space in associated reloc sections for dynamic relocs. */
3052
3053 static bfd_boolean
3054 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3055 {
3056 struct bfd_link_info *info = inf;
3057 struct ppc_elf_link_hash_entry *eh;
3058 struct ppc_elf_link_hash_table *htab;
3059 struct ppc_elf_dyn_relocs *p;
3060
3061 if (h->root.type == bfd_link_hash_indirect)
3062 return TRUE;
3063
3064 if (h->root.type == bfd_link_hash_warning)
3065 /* When warning symbols are created, they **replace** the "real"
3066 entry in the hash table, thus we never get to see the real
3067 symbol in a hash traversal. So look at it now. */
3068 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3069
3070 htab = ppc_elf_hash_table (info);
3071 if (htab->elf.dynamic_sections_created
3072 && h->plt.refcount > 0)
3073 {
3074 /* Make sure this symbol is output as a dynamic symbol. */
3075 if (h->dynindx == -1
3076 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3077 {
3078 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
3079 return FALSE;
3080 }
3081
3082 if (info->shared
3083 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3084 {
3085 asection *s = htab->plt;
3086
3087 /* If this is the first .plt entry, make room for the special
3088 first entry. */
3089 if (s->_raw_size == 0)
3090 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
3091
3092 /* The PowerPC PLT is actually composed of two parts, the
3093 first part is 2 words (for a load and a jump), and then
3094 there is a remaining word available at the end. */
3095 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
3096 + (PLT_SLOT_SIZE
3097 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE)
3098 / PLT_ENTRY_SIZE)));
3099
3100 /* If this symbol is not defined in a regular file, and we
3101 are not generating a shared library, then set the symbol
3102 to this location in the .plt. This is required to make
3103 function pointers compare as equal between the normal
3104 executable and the shared library. */
3105 if (! info->shared
3106 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3107 {
3108 h->root.u.def.section = s;
3109 h->root.u.def.value = h->plt.offset;
3110 }
3111
3112 /* Make room for this entry. After the 8192nd entry, room
3113 for two entries is allocated. */
3114 s->_raw_size += PLT_ENTRY_SIZE;
3115 if ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
3116 > PLT_NUM_SINGLE_ENTRIES)
3117 s->_raw_size += PLT_ENTRY_SIZE;
3118
3119 /* We also need to make an entry in the .rela.plt section. */
3120 htab->relplt->_raw_size += sizeof (Elf32_External_Rela);
3121 }
3122 else
3123 {
3124 h->plt.offset = (bfd_vma) -1;
3125 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3126 }
3127 }
3128 else
3129 {
3130 h->plt.offset = (bfd_vma) -1;
3131 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3132 }
3133
3134 eh = (struct ppc_elf_link_hash_entry *) h;
3135 if (eh->elf.got.refcount > 0)
3136 {
3137 /* Make sure this symbol is output as a dynamic symbol. */
3138 if (eh->elf.dynindx == -1
3139 && (eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3140 {
3141 if (!bfd_elf32_link_record_dynamic_symbol (info, &eh->elf))
3142 return FALSE;
3143 }
3144
3145 if (eh->tls_mask == (TLS_TLS | TLS_LD)
3146 && !(eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
3147 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
3148 eh->elf.got.offset = (bfd_vma) -1;
3149 else
3150 {
3151 bfd_boolean dyn;
3152 eh->elf.got.offset = htab->got->_raw_size;
3153 if ((eh->tls_mask & TLS_TLS) != 0)
3154 {
3155 if ((eh->tls_mask & TLS_LD) != 0)
3156 htab->got->_raw_size += 8;
3157 if ((eh->tls_mask & TLS_GD) != 0)
3158 htab->got->_raw_size += 8;
3159 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
3160 htab->got->_raw_size += 4;
3161 if ((eh->tls_mask & TLS_DTPREL) != 0)
3162 htab->got->_raw_size += 4;
3163 }
3164 else
3165 htab->got->_raw_size += 4;
3166 dyn = htab->elf.dynamic_sections_created;
3167 if ((info->shared
3168 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
3169 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
3170 || eh->elf.root.type != bfd_link_hash_undefweak))
3171 {
3172 /* All the entries we allocated need relocs. */
3173 htab->relgot->_raw_size
3174 += ((htab->got->_raw_size - eh->elf.got.offset) / 4
3175 * sizeof (Elf32_External_Rela));
3176 /* Except LD only needs one. */
3177 if ((eh->tls_mask & TLS_LD) != 0)
3178 htab->relgot->_raw_size -= sizeof (Elf32_External_Rela);
3179 }
3180 }
3181 }
3182 else
3183 eh->elf.got.offset = (bfd_vma) -1;
3184
3185 if (eh->dyn_relocs == NULL)
3186 return TRUE;
3187
3188 /* In the shared -Bsymbolic case, discard space allocated for
3189 dynamic pc-relative relocs against symbols which turn out to be
3190 defined in regular objects. For the normal shared case, discard
3191 space for relocs that have become local due to symbol visibility
3192 changes. */
3193
3194 if (info->shared)
3195 {
3196 /* Relocs that use pc_count are those that appear on a call insn,
3197 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
3198 generated via assembly. We want calls to protected symbols to
3199 resolve directly to the function rather than going via the plt.
3200 If people want function pointer comparisons to work as expected
3201 then they should avoid writing weird assembly. */
3202 if (SYMBOL_CALLS_LOCAL (info, h))
3203 {
3204 struct ppc_elf_dyn_relocs **pp;
3205
3206 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3207 {
3208 p->count -= p->pc_count;
3209 p->pc_count = 0;
3210 if (p->count == 0)
3211 *pp = p->next;
3212 else
3213 pp = &p->next;
3214 }
3215 }
3216
3217 /* Also discard relocs on undefined weak syms with non-default
3218 visibility. */
3219 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3220 && h->root.type == bfd_link_hash_undefweak)
3221 eh->dyn_relocs = NULL;
3222 }
3223 else if (ELIMINATE_COPY_RELOCS)
3224 {
3225 /* For the non-shared case, discard space for relocs against
3226 symbols which turn out to need copy relocs or are not
3227 dynamic. */
3228
3229 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3230 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3231 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3232 {
3233 /* Make sure this symbol is output as a dynamic symbol.
3234 Undefined weak syms won't yet be marked as dynamic. */
3235 if (h->dynindx == -1
3236 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3237 {
3238 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
3239 return FALSE;
3240 }
3241
3242 /* If that succeeded, we know we'll be keeping all the
3243 relocs. */
3244 if (h->dynindx != -1)
3245 goto keep;
3246 }
3247
3248 eh->dyn_relocs = NULL;
3249
3250 keep: ;
3251 }
3252
3253 /* Finally, allocate space. */
3254 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3255 {
3256 asection *sreloc = elf_section_data (p->sec)->sreloc;
3257 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
3258 }
3259
3260 return TRUE;
3261 }
3262
3263 /* Find any dynamic relocs that apply to read-only sections. */
3264
3265 static bfd_boolean
3266 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
3267 {
3268 struct ppc_elf_dyn_relocs *p;
3269
3270 if (h->root.type == bfd_link_hash_indirect)
3271 return TRUE;
3272
3273 if (h->root.type == bfd_link_hash_warning)
3274 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3275
3276 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3277 {
3278 asection *s = p->sec->output_section;
3279
3280 if (s != NULL
3281 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
3282 == (SEC_READONLY | SEC_ALLOC)))
3283 {
3284 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
3285
3286 /* Not an error, just cut short the traversal. */
3287 return FALSE;
3288 }
3289 }
3290 return TRUE;
3291 }
3292
3293 /* Set the sizes of the dynamic sections. */
3294
3295 static bfd_boolean
3296 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3297 struct bfd_link_info *info)
3298 {
3299 struct ppc_elf_link_hash_table *htab;
3300 asection *s;
3301 bfd_boolean relocs;
3302 bfd *ibfd;
3303
3304 #ifdef DEBUG
3305 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
3306 #endif
3307
3308 htab = ppc_elf_hash_table (info);
3309 BFD_ASSERT (htab->elf.dynobj != NULL);
3310
3311 if (elf_hash_table (info)->dynamic_sections_created)
3312 {
3313 /* Set the contents of the .interp section to the interpreter. */
3314 if (info->executable)
3315 {
3316 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
3317 BFD_ASSERT (s != NULL);
3318 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3319 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3320 }
3321 }
3322
3323 if (htab->tlsld_got.refcount > 0)
3324 {
3325 htab->tlsld_got.offset = htab->got->_raw_size;
3326 htab->got->_raw_size += 8;
3327 if (info->shared)
3328 htab->relgot->_raw_size += sizeof (Elf32_External_Rela);
3329 }
3330 else
3331 htab->tlsld_got.offset = (bfd_vma) -1;
3332
3333 /* Set up .got offsets for local syms, and space for local dynamic
3334 relocs. */
3335 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3336 {
3337 bfd_signed_vma *local_got;
3338 bfd_signed_vma *end_local_got;
3339 char *lgot_masks;
3340 bfd_size_type locsymcount;
3341 Elf_Internal_Shdr *symtab_hdr;
3342 asection *srel;
3343
3344 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
3345 continue;
3346
3347 for (s = ibfd->sections; s != NULL; s = s->next)
3348 {
3349 struct ppc_elf_dyn_relocs *p;
3350
3351 for (p = ((struct ppc_elf_dyn_relocs *)
3352 elf_section_data (s)->local_dynrel);
3353 p != NULL;
3354 p = p->next)
3355 {
3356 if (!bfd_is_abs_section (p->sec)
3357 && bfd_is_abs_section (p->sec->output_section))
3358 {
3359 /* Input section has been discarded, either because
3360 it is a copy of a linkonce section or due to
3361 linker script /DISCARD/, so we'll be discarding
3362 the relocs too. */
3363 }
3364 else if (p->count != 0)
3365 {
3366 elf_section_data (p->sec)->sreloc->_raw_size
3367 += p->count * sizeof (Elf32_External_Rela);
3368 if ((p->sec->output_section->flags
3369 & (SEC_READONLY | SEC_ALLOC))
3370 == (SEC_READONLY | SEC_ALLOC))
3371 info->flags |= DF_TEXTREL;
3372 }
3373 }
3374 }
3375
3376 local_got = elf_local_got_refcounts (ibfd);
3377 if (!local_got)
3378 continue;
3379
3380 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3381 locsymcount = symtab_hdr->sh_info;
3382 end_local_got = local_got + locsymcount;
3383 lgot_masks = (char *) end_local_got;
3384 s = htab->got;
3385 srel = htab->relgot;
3386 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3387 if (*local_got > 0)
3388 {
3389 if (*lgot_masks == (TLS_TLS | TLS_LD))
3390 {
3391 /* If just an LD reloc, we'll just use
3392 htab->tlsld_got.offset. */
3393 if (htab->tlsld_got.offset == (bfd_vma) -1)
3394 {
3395 htab->tlsld_got.offset = s->_raw_size;
3396 s->_raw_size += 8;
3397 if (info->shared)
3398 srel->_raw_size += sizeof (Elf32_External_Rela);
3399 }
3400 *local_got = (bfd_vma) -1;
3401 }
3402 else
3403 {
3404 *local_got = s->_raw_size;
3405 if ((*lgot_masks & TLS_TLS) != 0)
3406 {
3407 if ((*lgot_masks & TLS_GD) != 0)
3408 s->_raw_size += 8;
3409 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
3410 s->_raw_size += 4;
3411 if ((*lgot_masks & TLS_DTPREL) != 0)
3412 s->_raw_size += 4;
3413 }
3414 else
3415 s->_raw_size += 4;
3416 if (info->shared)
3417 srel->_raw_size += ((s->_raw_size - *local_got) / 4
3418 * sizeof (Elf32_External_Rela));
3419 }
3420 }
3421 else
3422 *local_got = (bfd_vma) -1;
3423 }
3424
3425 /* Allocate space for global sym dynamic relocs. */
3426 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3427
3428 /* We've now determined the sizes of the various dynamic sections.
3429 Allocate memory for them. */
3430 relocs = FALSE;
3431 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
3432 {
3433 if ((s->flags & SEC_LINKER_CREATED) == 0)
3434 continue;
3435
3436 if (s == htab->plt
3437 || s == htab->got
3438 || (htab->sdata != NULL && s == htab->sdata->section)
3439 || (htab->sdata2 != NULL && s == htab->sdata2->section))
3440 {
3441 /* Strip this section if we don't need it; see the
3442 comment below. */
3443 }
3444 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
3445 {
3446 if (s->_raw_size == 0)
3447 {
3448 /* If we don't need this section, strip it from the
3449 output file. This is mostly to handle .rela.bss and
3450 .rela.plt. We must create both sections in
3451 create_dynamic_sections, because they must be created
3452 before the linker maps input sections to output
3453 sections. The linker does that before
3454 adjust_dynamic_symbol is called, and it is that
3455 function which decides whether anything needs to go
3456 into these sections. */
3457 }
3458 else
3459 {
3460 /* Remember whether there are any relocation sections. */
3461 relocs = TRUE;
3462
3463 /* We use the reloc_count field as a counter if we need
3464 to copy relocs into the output file. */
3465 s->reloc_count = 0;
3466 }
3467 }
3468 else
3469 {
3470 /* It's not one of our sections, so don't allocate space. */
3471 continue;
3472 }
3473
3474 if (s->_raw_size == 0)
3475 {
3476 _bfd_strip_section_from_output (info, s);
3477 continue;
3478 }
3479
3480 /* Allocate memory for the section contents. */
3481 s->contents = bfd_zalloc (htab->elf.dynobj, s->_raw_size);
3482 if (s->contents == NULL)
3483 return FALSE;
3484 }
3485
3486 if (htab->elf.dynamic_sections_created)
3487 {
3488 /* Add some entries to the .dynamic section. We fill in the
3489 values later, in ppc_elf_finish_dynamic_sections, but we
3490 must add the entries now so that we get the correct size for
3491 the .dynamic section. The DT_DEBUG entry is filled in by the
3492 dynamic linker and used by the debugger. */
3493 #define add_dynamic_entry(TAG, VAL) \
3494 bfd_elf32_add_dynamic_entry (info, (TAG), (VAL))
3495
3496 if (info->executable)
3497 {
3498 if (!add_dynamic_entry (DT_DEBUG, 0))
3499 return FALSE;
3500 }
3501
3502 if (htab->plt != NULL && htab->plt->_raw_size != 0)
3503 {
3504 if (!add_dynamic_entry (DT_PLTGOT, 0)
3505 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3506 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3507 || !add_dynamic_entry (DT_JMPREL, 0))
3508 return FALSE;
3509 }
3510
3511 if (relocs)
3512 {
3513 if (!add_dynamic_entry (DT_RELA, 0)
3514 || !add_dynamic_entry (DT_RELASZ, 0)
3515 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3516 return FALSE;
3517 }
3518
3519 /* If any dynamic relocs apply to a read-only section, then we
3520 need a DT_TEXTREL entry. */
3521 if ((info->flags & DF_TEXTREL) == 0)
3522 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
3523 info);
3524
3525 if ((info->flags & DF_TEXTREL) != 0)
3526 {
3527 if (!add_dynamic_entry (DT_TEXTREL, 0))
3528 return FALSE;
3529 }
3530 }
3531 #undef add_dynamic_entry
3532
3533 return TRUE;
3534 }
3535 \f
3536 static bfd_boolean
3537 update_local_sym_info (bfd *abfd,
3538 Elf_Internal_Shdr *symtab_hdr,
3539 unsigned long r_symndx,
3540 int tls_type)
3541 {
3542 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3543 char *local_got_tls_masks;
3544
3545 if (local_got_refcounts == NULL)
3546 {
3547 bfd_size_type size = symtab_hdr->sh_info;
3548
3549 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3550 local_got_refcounts = bfd_zalloc (abfd, size);
3551 if (local_got_refcounts == NULL)
3552 return FALSE;
3553 elf_local_got_refcounts (abfd) = local_got_refcounts;
3554 }
3555
3556 local_got_refcounts[r_symndx] += 1;
3557 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3558 local_got_tls_masks[r_symndx] |= tls_type;
3559 return TRUE;
3560 }
3561
3562 static void
3563 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3564 {
3565 (*_bfd_error_handler)
3566 (_("%s: relocation %s cannot be used when making a shared object"),
3567 bfd_archive_filename (abfd),
3568 ppc_elf_howto_table[r_type]->name);
3569 bfd_set_error (bfd_error_bad_value);
3570 }
3571
3572 /* Look through the relocs for a section during the first phase, and
3573 allocate space in the global offset table or procedure linkage
3574 table. */
3575
3576 static bfd_boolean
3577 ppc_elf_check_relocs (bfd *abfd,
3578 struct bfd_link_info *info,
3579 asection *sec,
3580 const Elf_Internal_Rela *relocs)
3581 {
3582 struct ppc_elf_link_hash_table *htab;
3583 Elf_Internal_Shdr *symtab_hdr;
3584 struct elf_link_hash_entry **sym_hashes;
3585 const Elf_Internal_Rela *rel;
3586 const Elf_Internal_Rela *rel_end;
3587 asection *sreloc;
3588
3589 if (info->relocatable)
3590 return TRUE;
3591
3592 #ifdef DEBUG
3593 fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n",
3594 bfd_get_section_name (abfd, sec),
3595 bfd_archive_filename (abfd));
3596 #endif
3597
3598 /* Initialize howto table if not already done. */
3599 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3600 ppc_elf_howto_init ();
3601
3602 /* Create the linker generated sections all the time so that the
3603 special symbols are created. */
3604 htab = ppc_elf_hash_table (info);
3605 if (htab->sdata == NULL)
3606 {
3607 htab->sdata = ppc_elf_create_linker_section (abfd, info,
3608 LINKER_SECTION_SDATA);
3609 if (htab->sdata == NULL)
3610 return FALSE;
3611 }
3612
3613 if (htab->sdata2 == NULL)
3614 {
3615 htab->sdata2 = ppc_elf_create_linker_section (abfd, info,
3616 LINKER_SECTION_SDATA2);
3617 if (htab->sdata2 == NULL)
3618 return FALSE;
3619 }
3620
3621 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3622 sym_hashes = elf_sym_hashes (abfd);
3623 sreloc = NULL;
3624
3625 rel_end = relocs + sec->reloc_count;
3626 for (rel = relocs; rel < rel_end; rel++)
3627 {
3628 unsigned long r_symndx;
3629 enum elf_ppc_reloc_type r_type;
3630 struct elf_link_hash_entry *h;
3631 int tls_type = 0;
3632
3633 r_symndx = ELF32_R_SYM (rel->r_info);
3634 if (r_symndx < symtab_hdr->sh_info)
3635 h = NULL;
3636 else
3637 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3638
3639 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3640 This shows up in particular in an R_PPC_ADDR32 in the eabi
3641 startup code. */
3642 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3643 {
3644 if (htab->got == NULL)
3645 {
3646 if (htab->elf.dynobj == NULL)
3647 htab->elf.dynobj = abfd;
3648 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3649 return FALSE;
3650 }
3651 }
3652
3653 r_type = ELF32_R_TYPE (rel->r_info);
3654 switch (r_type)
3655 {
3656 case R_PPC_GOT_TLSLD16:
3657 case R_PPC_GOT_TLSLD16_LO:
3658 case R_PPC_GOT_TLSLD16_HI:
3659 case R_PPC_GOT_TLSLD16_HA:
3660 htab->tlsld_got.refcount += 1;
3661 tls_type = TLS_TLS | TLS_LD;
3662 goto dogottls;
3663
3664 case R_PPC_GOT_TLSGD16:
3665 case R_PPC_GOT_TLSGD16_LO:
3666 case R_PPC_GOT_TLSGD16_HI:
3667 case R_PPC_GOT_TLSGD16_HA:
3668 tls_type = TLS_TLS | TLS_GD;
3669 goto dogottls;
3670
3671 case R_PPC_GOT_TPREL16:
3672 case R_PPC_GOT_TPREL16_LO:
3673 case R_PPC_GOT_TPREL16_HI:
3674 case R_PPC_GOT_TPREL16_HA:
3675 if (info->shared)
3676 info->flags |= DF_STATIC_TLS;
3677 tls_type = TLS_TLS | TLS_TPREL;
3678 goto dogottls;
3679
3680 case R_PPC_GOT_DTPREL16:
3681 case R_PPC_GOT_DTPREL16_LO:
3682 case R_PPC_GOT_DTPREL16_HI:
3683 case R_PPC_GOT_DTPREL16_HA:
3684 tls_type = TLS_TLS | TLS_DTPREL;
3685 dogottls:
3686 sec->has_tls_reloc = 1;
3687 /* Fall thru */
3688
3689 /* GOT16 relocations */
3690 case R_PPC_GOT16:
3691 case R_PPC_GOT16_LO:
3692 case R_PPC_GOT16_HI:
3693 case R_PPC_GOT16_HA:
3694 /* This symbol requires a global offset table entry. */
3695 if (htab->got == NULL)
3696 {
3697 if (htab->elf.dynobj == NULL)
3698 htab->elf.dynobj = abfd;
3699 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3700 return FALSE;
3701 }
3702 if (h != NULL)
3703 {
3704 h->got.refcount += 1;
3705 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3706 }
3707 else
3708 /* This is a global offset table entry for a local symbol. */
3709 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3710 return FALSE;
3711 break;
3712
3713 /* Indirect .sdata relocation. */
3714 case R_PPC_EMB_SDAI16:
3715 if (info->shared)
3716 {
3717 bad_shared_reloc (abfd, r_type);
3718 return FALSE;
3719 }
3720 if (!elf_create_pointer_linker_section (abfd, info,
3721 htab->sdata, h, rel))
3722 return FALSE;
3723 break;
3724
3725 /* Indirect .sdata2 relocation. */
3726 case R_PPC_EMB_SDA2I16:
3727 if (info->shared)
3728 {
3729 bad_shared_reloc (abfd, r_type);
3730 return FALSE;
3731 }
3732 if (!elf_create_pointer_linker_section (abfd, info,
3733 htab->sdata2, h, rel))
3734 return FALSE;
3735 break;
3736
3737 case R_PPC_SDAREL16:
3738 case R_PPC_EMB_SDA2REL:
3739 case R_PPC_EMB_SDA21:
3740 case R_PPC_EMB_RELSDA:
3741 case R_PPC_EMB_NADDR32:
3742 case R_PPC_EMB_NADDR16:
3743 case R_PPC_EMB_NADDR16_LO:
3744 case R_PPC_EMB_NADDR16_HI:
3745 case R_PPC_EMB_NADDR16_HA:
3746 if (info->shared)
3747 {
3748 bad_shared_reloc (abfd, r_type);
3749 return FALSE;
3750 }
3751 break;
3752
3753 case R_PPC_PLT32:
3754 case R_PPC_PLTREL24:
3755 case R_PPC_PLTREL32:
3756 case R_PPC_PLT16_LO:
3757 case R_PPC_PLT16_HI:
3758 case R_PPC_PLT16_HA:
3759 #ifdef DEBUG
3760 fprintf (stderr, "Reloc requires a PLT entry\n");
3761 #endif
3762 /* This symbol requires a procedure linkage table entry. We
3763 actually build the entry in finish_dynamic_symbol,
3764 because this might be a case of linking PIC code without
3765 linking in any dynamic objects, in which case we don't
3766 need to generate a procedure linkage table after all. */
3767
3768 if (h == NULL)
3769 {
3770 /* It does not make sense to have a procedure linkage
3771 table entry for a local symbol. */
3772 (*_bfd_error_handler) (_("%s(%s+0x%lx): %s reloc against "
3773 "local symbol"),
3774 bfd_archive_filename (abfd),
3775 sec->name,
3776 (long) rel->r_offset,
3777 ppc_elf_howto_table[r_type]->name);
3778 bfd_set_error (bfd_error_bad_value);
3779 return FALSE;
3780 }
3781
3782 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3783 h->plt.refcount++;
3784 break;
3785
3786 /* The following relocations don't need to propagate the
3787 relocation if linking a shared object since they are
3788 section relative. */
3789 case R_PPC_SECTOFF:
3790 case R_PPC_SECTOFF_LO:
3791 case R_PPC_SECTOFF_HI:
3792 case R_PPC_SECTOFF_HA:
3793 case R_PPC_DTPREL16:
3794 case R_PPC_DTPREL16_LO:
3795 case R_PPC_DTPREL16_HI:
3796 case R_PPC_DTPREL16_HA:
3797 case R_PPC_TOC16:
3798 break;
3799
3800 /* This are just markers. */
3801 case R_PPC_TLS:
3802 case R_PPC_EMB_MRKREF:
3803 case R_PPC_NONE:
3804 case R_PPC_max:
3805 break;
3806
3807 /* These should only appear in dynamic objects. */
3808 case R_PPC_COPY:
3809 case R_PPC_GLOB_DAT:
3810 case R_PPC_JMP_SLOT:
3811 case R_PPC_RELATIVE:
3812 break;
3813
3814 /* These aren't handled yet. We'll report an error later. */
3815 case R_PPC_ADDR30:
3816 case R_PPC_EMB_RELSEC16:
3817 case R_PPC_EMB_RELST_LO:
3818 case R_PPC_EMB_RELST_HI:
3819 case R_PPC_EMB_RELST_HA:
3820 case R_PPC_EMB_BIT_FLD:
3821 break;
3822
3823 /* This refers only to functions defined in the shared library. */
3824 case R_PPC_LOCAL24PC:
3825 break;
3826
3827 /* This relocation describes the C++ object vtable hierarchy.
3828 Reconstruct it for later use during GC. */
3829 case R_PPC_GNU_VTINHERIT:
3830 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3831 return FALSE;
3832 break;
3833
3834 /* This relocation describes which C++ vtable entries are actually
3835 used. Record for later use during GC. */
3836 case R_PPC_GNU_VTENTRY:
3837 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3838 return FALSE;
3839 break;
3840
3841 /* We shouldn't really be seeing these. */
3842 case R_PPC_TPREL32:
3843 if (info->shared)
3844 info->flags |= DF_STATIC_TLS;
3845 goto dodyn;
3846
3847 /* Nor these. */
3848 case R_PPC_DTPMOD32:
3849 case R_PPC_DTPREL32:
3850 goto dodyn;
3851
3852 case R_PPC_TPREL16:
3853 case R_PPC_TPREL16_LO:
3854 case R_PPC_TPREL16_HI:
3855 case R_PPC_TPREL16_HA:
3856 if (info->shared)
3857 info->flags |= DF_STATIC_TLS;
3858 goto dodyn;
3859
3860 /* When creating a shared object, we must copy these
3861 relocs into the output file. We create a reloc
3862 section in dynobj and make room for the reloc. */
3863 case R_PPC_REL24:
3864 case R_PPC_REL14:
3865 case R_PPC_REL14_BRTAKEN:
3866 case R_PPC_REL14_BRNTAKEN:
3867 case R_PPC_REL32:
3868 if (h == NULL
3869 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3870 break;
3871 /* fall through */
3872
3873 case R_PPC_ADDR32:
3874 case R_PPC_ADDR24:
3875 case R_PPC_ADDR16:
3876 case R_PPC_ADDR16_LO:
3877 case R_PPC_ADDR16_HI:
3878 case R_PPC_ADDR16_HA:
3879 case R_PPC_ADDR14:
3880 case R_PPC_ADDR14_BRTAKEN:
3881 case R_PPC_ADDR14_BRNTAKEN:
3882 case R_PPC_UADDR32:
3883 case R_PPC_UADDR16:
3884 if (h != NULL && !info->shared)
3885 {
3886 /* We may need a plt entry if the symbol turns out to be
3887 a function defined in a dynamic object. */
3888 h->plt.refcount++;
3889
3890 /* We may need a copy reloc too. */
3891 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3892 }
3893
3894 dodyn:
3895 /* If we are creating a shared library, and this is a reloc
3896 against a global symbol, or a non PC relative reloc
3897 against a local symbol, then we need to copy the reloc
3898 into the shared library. However, if we are linking with
3899 -Bsymbolic, we do not need to copy a reloc against a
3900 global symbol which is defined in an object we are
3901 including in the link (i.e., DEF_REGULAR is set). At
3902 this point we have not seen all the input files, so it is
3903 possible that DEF_REGULAR is not set now but will be set
3904 later (it is never cleared). In case of a weak definition,
3905 DEF_REGULAR may be cleared later by a strong definition in
3906 a shared library. We account for that possibility below by
3907 storing information in the dyn_relocs field of the hash
3908 table entry. A similar situation occurs when creating
3909 shared libraries and symbol visibility changes render the
3910 symbol local.
3911
3912 If on the other hand, we are creating an executable, we
3913 may need to keep relocations for symbols satisfied by a
3914 dynamic library if we manage to avoid copy relocs for the
3915 symbol. */
3916 if ((info->shared
3917 && (MUST_BE_DYN_RELOC (r_type)
3918 || (h != NULL
3919 && (! info->symbolic
3920 || h->root.type == bfd_link_hash_defweak
3921 || (h->elf_link_hash_flags
3922 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3923 || (ELIMINATE_COPY_RELOCS
3924 && !info->shared
3925 && (sec->flags & SEC_ALLOC) != 0
3926 && h != NULL
3927 && (h->root.type == bfd_link_hash_defweak
3928 || (h->elf_link_hash_flags
3929 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3930 {
3931 struct ppc_elf_dyn_relocs *p;
3932 struct ppc_elf_dyn_relocs **head;
3933
3934 #ifdef DEBUG
3935 fprintf (stderr,
3936 "ppc_elf_check_relocs needs to "
3937 "create relocation for %s\n",
3938 (h && h->root.root.string
3939 ? h->root.root.string : "<unknown>"));
3940 #endif
3941 if (sreloc == NULL)
3942 {
3943 const char *name;
3944
3945 name = (bfd_elf_string_from_elf_section
3946 (abfd,
3947 elf_elfheader (abfd)->e_shstrndx,
3948 elf_section_data (sec)->rel_hdr.sh_name));
3949 if (name == NULL)
3950 return FALSE;
3951
3952 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3953 && strcmp (bfd_get_section_name (abfd, sec),
3954 name + 5) == 0);
3955
3956 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3957 if (sreloc == NULL)
3958 {
3959 flagword flags;
3960
3961 sreloc = bfd_make_section (htab->elf.dynobj, name);
3962 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3963 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3964 if ((sec->flags & SEC_ALLOC) != 0)
3965 flags |= SEC_ALLOC | SEC_LOAD;
3966 if (sreloc == NULL
3967 || ! bfd_set_section_flags (htab->elf.dynobj,
3968 sreloc, flags)
3969 || ! bfd_set_section_alignment (htab->elf.dynobj,
3970 sreloc, 2))
3971 return FALSE;
3972 }
3973 elf_section_data (sec)->sreloc = sreloc;
3974 }
3975
3976 /* If this is a global symbol, we count the number of
3977 relocations we need for this symbol. */
3978 if (h != NULL)
3979 {
3980 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3981 }
3982 else
3983 {
3984 /* Track dynamic relocs needed for local syms too.
3985 We really need local syms available to do this
3986 easily. Oh well. */
3987
3988 asection *s;
3989 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3990 sec, r_symndx);
3991 if (s == NULL)
3992 return FALSE;
3993
3994 head = ((struct ppc_elf_dyn_relocs **)
3995 &elf_section_data (s)->local_dynrel);
3996 }
3997
3998 p = *head;
3999 if (p == NULL || p->sec != sec)
4000 {
4001 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4002 if (p == NULL)
4003 return FALSE;
4004 p->next = *head;
4005 *head = p;
4006 p->sec = sec;
4007 p->count = 0;
4008 p->pc_count = 0;
4009 }
4010
4011 p->count += 1;
4012 if (!MUST_BE_DYN_RELOC (r_type))
4013 p->pc_count += 1;
4014 }
4015
4016 break;
4017 }
4018 }
4019
4020 return TRUE;
4021 }
4022
4023 /* Return the section that should be marked against GC for a given
4024 relocation. */
4025
4026 static asection *
4027 ppc_elf_gc_mark_hook (asection *sec,
4028 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4029 Elf_Internal_Rela *rel,
4030 struct elf_link_hash_entry *h,
4031 Elf_Internal_Sym *sym)
4032 {
4033 if (h != NULL)
4034 {
4035 switch (ELF32_R_TYPE (rel->r_info))
4036 {
4037 case R_PPC_GNU_VTINHERIT:
4038 case R_PPC_GNU_VTENTRY:
4039 break;
4040
4041 default:
4042 switch (h->root.type)
4043 {
4044 case bfd_link_hash_defined:
4045 case bfd_link_hash_defweak:
4046 return h->root.u.def.section;
4047
4048 case bfd_link_hash_common:
4049 return h->root.u.c.p->section;
4050
4051 default:
4052 break;
4053 }
4054 }
4055 }
4056 else
4057 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4058
4059 return NULL;
4060 }
4061
4062 /* Update the got, plt and dynamic reloc reference counts for the
4063 section being removed. */
4064
4065 static bfd_boolean
4066 ppc_elf_gc_sweep_hook (bfd *abfd,
4067 struct bfd_link_info *info,
4068 asection *sec,
4069 const Elf_Internal_Rela *relocs)
4070 {
4071 struct ppc_elf_link_hash_table *htab;
4072 Elf_Internal_Shdr *symtab_hdr;
4073 struct elf_link_hash_entry **sym_hashes;
4074 bfd_signed_vma *local_got_refcounts;
4075 const Elf_Internal_Rela *rel, *relend;
4076
4077 elf_section_data (sec)->local_dynrel = NULL;
4078
4079 htab = ppc_elf_hash_table (info);
4080 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4081 sym_hashes = elf_sym_hashes (abfd);
4082 local_got_refcounts = elf_local_got_refcounts (abfd);
4083
4084 relend = relocs + sec->reloc_count;
4085 for (rel = relocs; rel < relend; rel++)
4086 {
4087 unsigned long r_symndx;
4088 enum elf_ppc_reloc_type r_type;
4089 struct elf_link_hash_entry *h = NULL;
4090
4091 r_symndx = ELF32_R_SYM (rel->r_info);
4092 if (r_symndx >= symtab_hdr->sh_info)
4093 {
4094 struct ppc_elf_dyn_relocs **pp, *p;
4095 struct ppc_elf_link_hash_entry *eh;
4096
4097 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4098 eh = (struct ppc_elf_link_hash_entry *) h;
4099
4100 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4101 if (p->sec == sec)
4102 {
4103 /* Everything must go for SEC. */
4104 *pp = p->next;
4105 break;
4106 }
4107 }
4108
4109 r_type = ELF32_R_TYPE (rel->r_info);
4110 switch (r_type)
4111 {
4112 case R_PPC_GOT_TLSLD16:
4113 case R_PPC_GOT_TLSLD16_LO:
4114 case R_PPC_GOT_TLSLD16_HI:
4115 case R_PPC_GOT_TLSLD16_HA:
4116 htab->tlsld_got.refcount -= 1;
4117 /* Fall thru */
4118
4119 case R_PPC_GOT_TLSGD16:
4120 case R_PPC_GOT_TLSGD16_LO:
4121 case R_PPC_GOT_TLSGD16_HI:
4122 case R_PPC_GOT_TLSGD16_HA:
4123 case R_PPC_GOT_TPREL16:
4124 case R_PPC_GOT_TPREL16_LO:
4125 case R_PPC_GOT_TPREL16_HI:
4126 case R_PPC_GOT_TPREL16_HA:
4127 case R_PPC_GOT_DTPREL16:
4128 case R_PPC_GOT_DTPREL16_LO:
4129 case R_PPC_GOT_DTPREL16_HI:
4130 case R_PPC_GOT_DTPREL16_HA:
4131 case R_PPC_GOT16:
4132 case R_PPC_GOT16_LO:
4133 case R_PPC_GOT16_HI:
4134 case R_PPC_GOT16_HA:
4135 if (h != NULL)
4136 {
4137 if (h->got.refcount > 0)
4138 h->got.refcount--;
4139 }
4140 else if (local_got_refcounts != NULL)
4141 {
4142 if (local_got_refcounts[r_symndx] > 0)
4143 local_got_refcounts[r_symndx]--;
4144 }
4145 break;
4146
4147 case R_PPC_REL24:
4148 case R_PPC_REL14:
4149 case R_PPC_REL14_BRTAKEN:
4150 case R_PPC_REL14_BRNTAKEN:
4151 case R_PPC_REL32:
4152 if (h == NULL
4153 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4154 break;
4155 /* Fall thru */
4156
4157 case R_PPC_ADDR32:
4158 case R_PPC_ADDR24:
4159 case R_PPC_ADDR16:
4160 case R_PPC_ADDR16_LO:
4161 case R_PPC_ADDR16_HI:
4162 case R_PPC_ADDR16_HA:
4163 case R_PPC_ADDR14:
4164 case R_PPC_ADDR14_BRTAKEN:
4165 case R_PPC_ADDR14_BRNTAKEN:
4166 case R_PPC_UADDR32:
4167 case R_PPC_UADDR16:
4168 case R_PPC_PLT32:
4169 case R_PPC_PLTREL24:
4170 case R_PPC_PLT16_LO:
4171 case R_PPC_PLT16_HI:
4172 case R_PPC_PLT16_HA:
4173 if (h != NULL)
4174 {
4175 if (h->plt.refcount > 0)
4176 h->plt.refcount--;
4177 }
4178 break;
4179
4180 default:
4181 break;
4182 }
4183 }
4184 return TRUE;
4185 }
4186
4187 /* Set htab->tls_sec and htab->tls_get_addr. */
4188
4189 bfd_boolean
4190 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4191 {
4192 asection *tls;
4193 struct ppc_elf_link_hash_table *htab;
4194
4195 htab = ppc_elf_hash_table (info);
4196 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4197 FALSE, FALSE, TRUE);
4198
4199 for (tls = obfd->sections; tls != NULL; tls = tls->next)
4200 if ((tls->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4201 == (SEC_THREAD_LOCAL | SEC_LOAD))
4202 break;
4203 htab->tls_sec = tls;
4204
4205 return tls != NULL;
4206 }
4207
4208 /* Run through all the TLS relocs looking for optimization
4209 opportunities. */
4210
4211 bfd_boolean
4212 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4213 struct bfd_link_info *info)
4214 {
4215 bfd *ibfd;
4216 asection *sec;
4217 struct ppc_elf_link_hash_table *htab;
4218
4219 if (info->relocatable || info->shared)
4220 return TRUE;
4221
4222 htab = ppc_elf_hash_table (info);
4223 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4224 {
4225 Elf_Internal_Sym *locsyms = NULL;
4226 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4227
4228 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4229 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4230 {
4231 Elf_Internal_Rela *relstart, *rel, *relend;
4232 int expecting_tls_get_addr;
4233
4234 /* Read the relocations. */
4235 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4236 info->keep_memory);
4237 if (relstart == NULL)
4238 return FALSE;
4239
4240 expecting_tls_get_addr = 0;
4241 relend = relstart + sec->reloc_count;
4242 for (rel = relstart; rel < relend; rel++)
4243 {
4244 enum elf_ppc_reloc_type r_type;
4245 unsigned long r_symndx;
4246 struct elf_link_hash_entry *h = NULL;
4247 char *tls_mask;
4248 char tls_set, tls_clear;
4249 bfd_boolean is_local;
4250
4251 r_symndx = ELF32_R_SYM (rel->r_info);
4252 if (r_symndx >= symtab_hdr->sh_info)
4253 {
4254 struct elf_link_hash_entry **sym_hashes;
4255
4256 sym_hashes = elf_sym_hashes (ibfd);
4257 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4258 while (h->root.type == bfd_link_hash_indirect
4259 || h->root.type == bfd_link_hash_warning)
4260 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4261 }
4262
4263 is_local = FALSE;
4264 if (h == NULL
4265 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
4266 is_local = TRUE;
4267
4268 r_type = ELF32_R_TYPE (rel->r_info);
4269 switch (r_type)
4270 {
4271 case R_PPC_GOT_TLSLD16:
4272 case R_PPC_GOT_TLSLD16_LO:
4273 case R_PPC_GOT_TLSLD16_HI:
4274 case R_PPC_GOT_TLSLD16_HA:
4275 /* These relocs should never be against a symbol
4276 defined in a shared lib. Leave them alone if
4277 that turns out to be the case. */
4278 expecting_tls_get_addr = 0;
4279 htab->tlsld_got.refcount -= 1;
4280 if (!is_local)
4281 continue;
4282
4283 /* LD -> LE */
4284 tls_set = 0;
4285 tls_clear = TLS_LD;
4286 expecting_tls_get_addr = 1;
4287 break;
4288
4289 case R_PPC_GOT_TLSGD16:
4290 case R_PPC_GOT_TLSGD16_LO:
4291 case R_PPC_GOT_TLSGD16_HI:
4292 case R_PPC_GOT_TLSGD16_HA:
4293 if (is_local)
4294 /* GD -> LE */
4295 tls_set = 0;
4296 else
4297 /* GD -> IE */
4298 tls_set = TLS_TLS | TLS_TPRELGD;
4299 tls_clear = TLS_GD;
4300 expecting_tls_get_addr = 1;
4301 break;
4302
4303 case R_PPC_GOT_TPREL16:
4304 case R_PPC_GOT_TPREL16_LO:
4305 case R_PPC_GOT_TPREL16_HI:
4306 case R_PPC_GOT_TPREL16_HA:
4307 expecting_tls_get_addr = 0;
4308 if (is_local)
4309 {
4310 /* IE -> LE */
4311 tls_set = 0;
4312 tls_clear = TLS_TPREL;
4313 break;
4314 }
4315 else
4316 continue;
4317
4318 case R_PPC_REL14:
4319 case R_PPC_REL14_BRTAKEN:
4320 case R_PPC_REL14_BRNTAKEN:
4321 case R_PPC_REL24:
4322 if (expecting_tls_get_addr
4323 && h != NULL
4324 && h == htab->tls_get_addr)
4325 {
4326 if (h->plt.refcount > 0)
4327 h->plt.refcount -= 1;
4328 }
4329 expecting_tls_get_addr = 0;
4330 continue;
4331
4332 default:
4333 expecting_tls_get_addr = 0;
4334 continue;
4335 }
4336
4337 if (h != NULL)
4338 {
4339 if (tls_set == 0)
4340 {
4341 /* We managed to get rid of a got entry. */
4342 if (h->got.refcount > 0)
4343 h->got.refcount -= 1;
4344 }
4345 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4346 }
4347 else
4348 {
4349 Elf_Internal_Sym *sym;
4350 bfd_signed_vma *lgot_refs;
4351 char *lgot_masks;
4352
4353 if (locsyms == NULL)
4354 {
4355 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4356 if (locsyms == NULL)
4357 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4358 symtab_hdr->sh_info,
4359 0, NULL, NULL, NULL);
4360 if (locsyms == NULL)
4361 {
4362 if (elf_section_data (sec)->relocs != relstart)
4363 free (relstart);
4364 return FALSE;
4365 }
4366 }
4367 sym = locsyms + r_symndx;
4368 lgot_refs = elf_local_got_refcounts (ibfd);
4369 if (lgot_refs == NULL)
4370 abort ();
4371 if (tls_set == 0)
4372 {
4373 /* We managed to get rid of a got entry. */
4374 if (lgot_refs[r_symndx] > 0)
4375 lgot_refs[r_symndx] -= 1;
4376 }
4377 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4378 tls_mask = &lgot_masks[r_symndx];
4379 }
4380
4381 *tls_mask |= tls_set;
4382 *tls_mask &= ~tls_clear;
4383 }
4384
4385 if (elf_section_data (sec)->relocs != relstart)
4386 free (relstart);
4387 }
4388
4389 if (locsyms != NULL
4390 && (symtab_hdr->contents != (unsigned char *) locsyms))
4391 {
4392 if (!info->keep_memory)
4393 free (locsyms);
4394 else
4395 symtab_hdr->contents = (unsigned char *) locsyms;
4396 }
4397 }
4398 return TRUE;
4399 }
4400 \f
4401 /* Hook called by the linker routine which adds symbols from an object
4402 file. We use it to put .comm items in .sbss, and not .bss. */
4403
4404 static bfd_boolean
4405 ppc_elf_add_symbol_hook (bfd *abfd,
4406 struct bfd_link_info *info,
4407 const Elf_Internal_Sym *sym,
4408 const char **namep ATTRIBUTE_UNUSED,
4409 flagword *flagsp ATTRIBUTE_UNUSED,
4410 asection **secp,
4411 bfd_vma *valp)
4412 {
4413 if (sym->st_shndx == SHN_COMMON
4414 && !info->relocatable
4415 && sym->st_size <= elf_gp_size (abfd)
4416 && (info->hash->creator == abfd->xvec
4417 || info->hash->creator == abfd->xvec->alternative_target))
4418 {
4419 /* Common symbols less than or equal to -G nn bytes are automatically
4420 put into .sbss. */
4421 struct ppc_elf_link_hash_table *htab;
4422
4423 htab = ppc_elf_hash_table (info);
4424 if (htab->sbss == NULL)
4425 {
4426 flagword flags = SEC_IS_COMMON;
4427
4428 htab->sbss = bfd_make_section_anyway (abfd, ".sbss");
4429 if (htab->sbss == NULL
4430 || ! bfd_set_section_flags (abfd, htab->sbss, flags))
4431 return FALSE;
4432 }
4433
4434 *secp = htab->sbss;
4435 *valp = sym->st_size;
4436 }
4437
4438 return TRUE;
4439 }
4440 \f
4441 /* Finish up dynamic symbol handling. We set the contents of various
4442 dynamic sections here. */
4443
4444 static bfd_boolean
4445 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
4446 struct bfd_link_info *info,
4447 struct elf_link_hash_entry *h,
4448 Elf_Internal_Sym *sym)
4449 {
4450 struct ppc_elf_link_hash_table *htab;
4451
4452 #ifdef DEBUG
4453 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
4454 h->root.root.string);
4455 #endif
4456
4457 htab = ppc_elf_hash_table (info);
4458 BFD_ASSERT (htab->elf.dynobj != NULL);
4459
4460 if (h->plt.offset != (bfd_vma) -1)
4461 {
4462 Elf_Internal_Rela rela;
4463 bfd_byte *loc;
4464 bfd_vma reloc_index;
4465
4466 #ifdef DEBUG
4467 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
4468 #endif
4469
4470 /* This symbol has an entry in the procedure linkage table. Set
4471 it up. */
4472
4473 BFD_ASSERT (h->dynindx != -1);
4474 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
4475
4476 /* We don't need to fill in the .plt. The ppc dynamic linker
4477 will fill it in. */
4478
4479 /* Fill in the entry in the .rela.plt section. */
4480 rela.r_offset = (htab->plt->output_section->vma
4481 + htab->plt->output_offset
4482 + h->plt.offset);
4483 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
4484 rela.r_addend = 0;
4485
4486 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
4487 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
4488 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
4489 loc = (htab->relplt->contents
4490 + reloc_index * sizeof (Elf32_External_Rela));
4491 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4492
4493 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4494 {
4495 /* Mark the symbol as undefined, rather than as defined in
4496 the .plt section. Leave the value alone. */
4497 sym->st_shndx = SHN_UNDEF;
4498 /* If the symbol is weak, we do need to clear the value.
4499 Otherwise, the PLT entry would provide a definition for
4500 the symbol even if the symbol wasn't defined anywhere,
4501 and so the symbol would never be NULL. */
4502 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
4503 == 0)
4504 sym->st_value = 0;
4505 }
4506 }
4507
4508 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4509 {
4510 asection *s;
4511 Elf_Internal_Rela rela;
4512 bfd_byte *loc;
4513
4514 /* This symbols needs a copy reloc. Set it up. */
4515
4516 #ifdef DEBUG
4517 fprintf (stderr, ", copy");
4518 #endif
4519
4520 BFD_ASSERT (h->dynindx != -1);
4521
4522 if (h->size <= elf_gp_size (htab->elf.dynobj))
4523 s = htab->relsbss;
4524 else
4525 s = htab->relbss;
4526 BFD_ASSERT (s != NULL);
4527
4528 rela.r_offset = (h->root.u.def.value
4529 + h->root.u.def.section->output_section->vma
4530 + h->root.u.def.section->output_offset);
4531 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
4532 rela.r_addend = 0;
4533 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4534 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4535 }
4536
4537 #ifdef DEBUG
4538 fprintf (stderr, "\n");
4539 #endif
4540
4541 /* Mark some specially defined symbols as absolute. */
4542 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4543 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
4544 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
4545 sym->st_shndx = SHN_ABS;
4546
4547 return TRUE;
4548 }
4549 \f
4550 /* Finish up the dynamic sections. */
4551
4552 static bfd_boolean
4553 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
4554 struct bfd_link_info *info)
4555 {
4556 asection *sdyn;
4557 struct ppc_elf_link_hash_table *htab;
4558
4559 #ifdef DEBUG
4560 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
4561 #endif
4562
4563 htab = ppc_elf_hash_table (info);
4564 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
4565
4566 if (htab->elf.dynamic_sections_created)
4567 {
4568 Elf32_External_Dyn *dyncon, *dynconend;
4569
4570 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
4571
4572 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4573 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4574 for (; dyncon < dynconend; dyncon++)
4575 {
4576 Elf_Internal_Dyn dyn;
4577 asection *s;
4578
4579 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
4580
4581 switch (dyn.d_tag)
4582 {
4583 case DT_PLTGOT:
4584 s = htab->plt;
4585 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4586 break;
4587
4588 case DT_PLTRELSZ:
4589 dyn.d_un.d_val = htab->relplt->_raw_size;
4590 break;
4591
4592 case DT_JMPREL:
4593 s = htab->relplt;
4594 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4595 break;
4596
4597 default:
4598 continue;
4599 }
4600
4601 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4602 }
4603 }
4604
4605 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
4606 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
4607 if (htab->got)
4608 {
4609 unsigned char *contents = htab->got->contents;
4610 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
4611
4612 if (sdyn == NULL)
4613 bfd_put_32 (output_bfd, 0, contents + 4);
4614 else
4615 bfd_put_32 (output_bfd,
4616 sdyn->output_section->vma + sdyn->output_offset,
4617 contents + 4);
4618
4619 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
4620 }
4621
4622 return TRUE;
4623 }
4624 \f
4625 /* The RELOCATE_SECTION function is called by the ELF backend linker
4626 to handle the relocations for a section.
4627
4628 The relocs are always passed as Rela structures; if the section
4629 actually uses Rel structures, the r_addend field will always be
4630 zero.
4631
4632 This function is responsible for adjust the section contents as
4633 necessary, and (if using Rela relocs and generating a
4634 relocatable output file) adjusting the reloc addend as
4635 necessary.
4636
4637 This function does not have to worry about setting the reloc
4638 address or the reloc symbol index.
4639
4640 LOCAL_SYMS is a pointer to the swapped in local symbols.
4641
4642 LOCAL_SECTIONS is an array giving the section in the input file
4643 corresponding to the st_shndx field of each local symbol.
4644
4645 The global hash table entry for the global symbols can be found
4646 via elf_sym_hashes (input_bfd).
4647
4648 When generating relocatable output, this function must handle
4649 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
4650 going to be the section symbol corresponding to the output
4651 section, which means that the addend must be adjusted
4652 accordingly. */
4653
4654 static bfd_boolean
4655 ppc_elf_relocate_section (bfd *output_bfd,
4656 struct bfd_link_info *info,
4657 bfd *input_bfd,
4658 asection *input_section,
4659 bfd_byte *contents,
4660 Elf_Internal_Rela *relocs,
4661 Elf_Internal_Sym *local_syms,
4662 asection **local_sections)
4663 {
4664 Elf_Internal_Shdr *symtab_hdr;
4665 struct elf_link_hash_entry **sym_hashes;
4666 struct ppc_elf_link_hash_table *htab;
4667 Elf_Internal_Rela *rel;
4668 Elf_Internal_Rela *relend;
4669 Elf_Internal_Rela outrel;
4670 bfd_byte *loc;
4671 asection *sreloc = NULL;
4672 bfd_vma *local_got_offsets;
4673 bfd_boolean ret = TRUE;
4674
4675 #ifdef DEBUG
4676 fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, "
4677 "%ld relocations%s\n",
4678 bfd_archive_filename (input_bfd),
4679 bfd_section_name(input_bfd, input_section),
4680 (long) input_section->reloc_count,
4681 (info->relocatable) ? " (relocatable)" : "");
4682 #endif
4683
4684 if (info->relocatable)
4685 return TRUE;
4686
4687 /* Initialize howto table if not already done. */
4688 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4689 ppc_elf_howto_init ();
4690
4691 htab = ppc_elf_hash_table (info);
4692 local_got_offsets = elf_local_got_offsets (input_bfd);
4693 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4694 sym_hashes = elf_sym_hashes (input_bfd);
4695 rel = relocs;
4696 relend = relocs + input_section->reloc_count;
4697 for (; rel < relend; rel++)
4698 {
4699 enum elf_ppc_reloc_type r_type;
4700 bfd_vma addend;
4701 bfd_reloc_status_type r;
4702 Elf_Internal_Sym *sym;
4703 asection *sec;
4704 struct elf_link_hash_entry *h;
4705 const char *sym_name;
4706 reloc_howto_type *howto;
4707 unsigned long r_symndx;
4708 bfd_vma relocation;
4709 bfd_vma branch_bit, insn, from;
4710 bfd_boolean unresolved_reloc;
4711 bfd_boolean warned;
4712 unsigned int tls_type, tls_mask, tls_gd;
4713
4714 r_type = ELF32_R_TYPE (rel->r_info);
4715 sym = NULL;
4716 sec = NULL;
4717 h = NULL;
4718 unresolved_reloc = FALSE;
4719 warned = FALSE;
4720 r_symndx = ELF32_R_SYM (rel->r_info);
4721 if (r_symndx < symtab_hdr->sh_info)
4722 {
4723 sym = local_syms + r_symndx;
4724 sec = local_sections[r_symndx];
4725 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
4726
4727 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
4728 }
4729 else
4730 {
4731 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4732 while (h->root.type == bfd_link_hash_indirect
4733 || h->root.type == bfd_link_hash_warning)
4734 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4735 sym_name = h->root.root.string;
4736
4737 relocation = 0;
4738 if (h->root.type == bfd_link_hash_defined
4739 || h->root.type == bfd_link_hash_defweak)
4740 {
4741 sec = h->root.u.def.section;
4742 /* Set a flag that will be cleared later if we find a
4743 relocation value for this symbol. output_section
4744 is typically NULL for symbols satisfied by a shared
4745 library. */
4746 if (sec->output_section == NULL)
4747 unresolved_reloc = TRUE;
4748 else
4749 relocation = (h->root.u.def.value
4750 + sec->output_section->vma
4751 + sec->output_offset);
4752 }
4753 else if (h->root.type == bfd_link_hash_undefweak)
4754 ;
4755 else if (!info->executable
4756 && !info->no_undefined
4757 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
4758 ;
4759 else
4760 {
4761 if (! ((*info->callbacks->undefined_symbol)
4762 (info, h->root.root.string, input_bfd, input_section,
4763 rel->r_offset, (info->executable
4764 || info->no_undefined
4765 || ELF_ST_VISIBILITY (h->other)))))
4766 return FALSE;
4767 warned = TRUE;
4768 }
4769 }
4770
4771 /* TLS optimizations. Replace instruction sequences and relocs
4772 based on information we collected in tls_optimize. We edit
4773 RELOCS so that --emit-relocs will output something sensible
4774 for the final instruction stream. */
4775 tls_mask = 0;
4776 tls_gd = 0;
4777 if (IS_PPC_TLS_RELOC (r_type))
4778 {
4779 if (h != NULL)
4780 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
4781 else if (local_got_offsets != NULL)
4782 {
4783 char *lgot_masks;
4784 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
4785 tls_mask = lgot_masks[r_symndx];
4786 }
4787 }
4788
4789 /* Ensure reloc mapping code below stays sane. */
4790 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
4791 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
4792 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
4793 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
4794 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
4795 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
4796 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
4797 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
4798 abort ();
4799 switch (r_type)
4800 {
4801 default:
4802 break;
4803
4804 case R_PPC_GOT_TPREL16:
4805 case R_PPC_GOT_TPREL16_LO:
4806 if (tls_mask != 0
4807 && (tls_mask & TLS_TPREL) == 0)
4808 {
4809 bfd_vma insn;
4810 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
4811 insn &= 31 << 21;
4812 insn |= 0x3c020000; /* addis 0,2,0 */
4813 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
4814 r_type = R_PPC_TPREL16_HA;
4815 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4816 }
4817 break;
4818
4819 case R_PPC_TLS:
4820 if (tls_mask != 0
4821 && (tls_mask & TLS_TPREL) == 0)
4822 {
4823 bfd_vma insn, rtra;
4824 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4825 if ((insn & ((31 << 26) | (31 << 11)))
4826 == ((31 << 26) | (2 << 11)))
4827 rtra = insn & ((1 << 26) - (1 << 16));
4828 else if ((insn & ((31 << 26) | (31 << 16)))
4829 == ((31 << 26) | (2 << 16)))
4830 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
4831 else
4832 abort ();
4833 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
4834 /* add -> addi. */
4835 insn = 14 << 26;
4836 else if ((insn & (31 << 1)) == 23 << 1
4837 && ((insn & (31 << 6)) < 14 << 6
4838 || ((insn & (31 << 6)) >= 16 << 6
4839 && (insn & (31 << 6)) < 24 << 6)))
4840 /* load and store indexed -> dform. */
4841 insn = (32 | ((insn >> 6) & 31)) << 26;
4842 else if ((insn & (31 << 1)) == 21 << 1
4843 && (insn & (0x1a << 6)) == 0)
4844 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
4845 insn = (((58 | ((insn >> 6) & 4)) << 26)
4846 | ((insn >> 6) & 1));
4847 else if ((insn & (31 << 1)) == 21 << 1
4848 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
4849 /* lwax -> lwa. */
4850 insn = (58 << 26) | 2;
4851 else
4852 abort ();
4853 insn |= rtra;
4854 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4855 r_type = R_PPC_TPREL16_LO;
4856 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4857 /* Was PPC_TLS which sits on insn boundary, now
4858 PPC_TPREL16_LO which is at insn+2. */
4859 rel->r_offset += 2;
4860 }
4861 break;
4862
4863 case R_PPC_GOT_TLSGD16_HI:
4864 case R_PPC_GOT_TLSGD16_HA:
4865 tls_gd = TLS_TPRELGD;
4866 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4867 goto tls_gdld_hi;
4868 break;
4869
4870 case R_PPC_GOT_TLSLD16_HI:
4871 case R_PPC_GOT_TLSLD16_HA:
4872 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4873 {
4874 tls_gdld_hi:
4875 if ((tls_mask & tls_gd) != 0)
4876 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4877 + R_PPC_GOT_TPREL16);
4878 else
4879 {
4880 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
4881 rel->r_offset -= 2;
4882 r_type = R_PPC_NONE;
4883 }
4884 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4885 }
4886 break;
4887
4888 case R_PPC_GOT_TLSGD16:
4889 case R_PPC_GOT_TLSGD16_LO:
4890 tls_gd = TLS_TPRELGD;
4891 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4892 goto tls_get_addr_check;
4893 break;
4894
4895 case R_PPC_GOT_TLSLD16:
4896 case R_PPC_GOT_TLSLD16_LO:
4897 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4898 {
4899 tls_get_addr_check:
4900 if (rel + 1 < relend)
4901 {
4902 enum elf_ppc_reloc_type r_type2;
4903 unsigned long r_symndx2;
4904 struct elf_link_hash_entry *h2;
4905 bfd_vma insn1, insn2;
4906 bfd_vma offset;
4907
4908 /* The next instruction should be a call to
4909 __tls_get_addr. Peek at the reloc to be sure. */
4910 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4911 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4912 if (r_symndx2 < symtab_hdr->sh_info
4913 || (r_type2 != R_PPC_REL14
4914 && r_type2 != R_PPC_REL14_BRTAKEN
4915 && r_type2 != R_PPC_REL14_BRNTAKEN
4916 && r_type2 != R_PPC_REL24
4917 && r_type2 != R_PPC_PLTREL24))
4918 break;
4919
4920 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4921 while (h2->root.type == bfd_link_hash_indirect
4922 || h2->root.type == bfd_link_hash_warning)
4923 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
4924 if (h2 == NULL || h2 != htab->tls_get_addr)
4925 break;
4926
4927 /* OK, it checks out. Replace the call. */
4928 offset = rel[1].r_offset;
4929 insn1 = bfd_get_32 (output_bfd,
4930 contents + rel->r_offset - 2);
4931 if ((tls_mask & tls_gd) != 0)
4932 {
4933 /* IE */
4934 insn1 &= (1 << 26) - 1;
4935 insn1 |= 32 << 26; /* lwz */
4936 insn2 = 0x7c631214; /* add 3,3,2 */
4937 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
4938 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4939 + R_PPC_GOT_TPREL16);
4940 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4941 }
4942 else
4943 {
4944 /* LE */
4945 insn1 = 0x3c620000; /* addis 3,2,0 */
4946 insn2 = 0x38630000; /* addi 3,3,0 */
4947 if (tls_gd == 0)
4948 {
4949 /* Was an LD reloc. */
4950 r_symndx = 0;
4951 rel->r_addend = htab->tls_sec->vma + DTP_OFFSET;
4952 rel[1].r_addend = htab->tls_sec->vma + DTP_OFFSET;
4953 }
4954 r_type = R_PPC_TPREL16_HA;
4955 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4956 rel[1].r_info = ELF32_R_INFO (r_symndx,
4957 R_PPC_TPREL16_LO);
4958 rel[1].r_offset += 2;
4959 }
4960 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
4961 bfd_put_32 (output_bfd, insn2, contents + offset);
4962 if (tls_gd == 0)
4963 {
4964 /* We changed the symbol on an LD reloc. Start over
4965 in order to get h, sym, sec etc. right. */
4966 rel--;
4967 continue;
4968 }
4969 }
4970 }
4971 break;
4972 }
4973
4974 /* Handle other relocations that tweak non-addend part of insn. */
4975 branch_bit = 0;
4976 switch (r_type)
4977 {
4978 default:
4979 break;
4980
4981 /* Branch taken prediction relocations. */
4982 case R_PPC_ADDR14_BRTAKEN:
4983 case R_PPC_REL14_BRTAKEN:
4984 branch_bit = BRANCH_PREDICT_BIT;
4985 /* Fall thru */
4986
4987 /* Branch not taken predicition relocations. */
4988 case R_PPC_ADDR14_BRNTAKEN:
4989 case R_PPC_REL14_BRNTAKEN:
4990 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4991 insn &= ~BRANCH_PREDICT_BIT;
4992 insn |= branch_bit;
4993
4994 from = (rel->r_offset
4995 + input_section->output_offset
4996 + input_section->output_section->vma);
4997
4998 /* Invert 'y' bit if not the default. */
4999 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5000 insn ^= BRANCH_PREDICT_BIT;
5001
5002 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5003 break;
5004 }
5005
5006 addend = rel->r_addend;
5007 tls_type = 0;
5008 howto = NULL;
5009 if (r_type < R_PPC_max)
5010 howto = ppc_elf_howto_table[r_type];
5011 switch (r_type)
5012 {
5013 default:
5014 (*_bfd_error_handler)
5015 (_("%s: unknown relocation type %d for symbol %s"),
5016 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
5017
5018 bfd_set_error (bfd_error_bad_value);
5019 ret = FALSE;
5020 continue;
5021
5022 case R_PPC_NONE:
5023 case R_PPC_TLS:
5024 case R_PPC_EMB_MRKREF:
5025 case R_PPC_GNU_VTINHERIT:
5026 case R_PPC_GNU_VTENTRY:
5027 continue;
5028
5029 /* GOT16 relocations. Like an ADDR16 using the symbol's
5030 address in the GOT as relocation value instead of the
5031 symbol's value itself. Also, create a GOT entry for the
5032 symbol and put the symbol value there. */
5033 case R_PPC_GOT_TLSGD16:
5034 case R_PPC_GOT_TLSGD16_LO:
5035 case R_PPC_GOT_TLSGD16_HI:
5036 case R_PPC_GOT_TLSGD16_HA:
5037 tls_type = TLS_TLS | TLS_GD;
5038 goto dogot;
5039
5040 case R_PPC_GOT_TLSLD16:
5041 case R_PPC_GOT_TLSLD16_LO:
5042 case R_PPC_GOT_TLSLD16_HI:
5043 case R_PPC_GOT_TLSLD16_HA:
5044 tls_type = TLS_TLS | TLS_LD;
5045 goto dogot;
5046
5047 case R_PPC_GOT_TPREL16:
5048 case R_PPC_GOT_TPREL16_LO:
5049 case R_PPC_GOT_TPREL16_HI:
5050 case R_PPC_GOT_TPREL16_HA:
5051 tls_type = TLS_TLS | TLS_TPREL;
5052 goto dogot;
5053
5054 case R_PPC_GOT_DTPREL16:
5055 case R_PPC_GOT_DTPREL16_LO:
5056 case R_PPC_GOT_DTPREL16_HI:
5057 case R_PPC_GOT_DTPREL16_HA:
5058 tls_type = TLS_TLS | TLS_DTPREL;
5059 goto dogot;
5060
5061 case R_PPC_GOT16:
5062 case R_PPC_GOT16_LO:
5063 case R_PPC_GOT16_HI:
5064 case R_PPC_GOT16_HA:
5065 dogot:
5066 {
5067 /* Relocation is to the entry for this symbol in the global
5068 offset table. */
5069 bfd_vma off;
5070 bfd_vma *offp;
5071 unsigned long indx;
5072
5073 if (htab->got == NULL)
5074 abort ();
5075
5076 indx = 0;
5077 if (tls_type == (TLS_TLS | TLS_LD)
5078 && (h == NULL
5079 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
5080 offp = &htab->tlsld_got.offset;
5081 else if (h != NULL)
5082 {
5083 bfd_boolean dyn;
5084 dyn = htab->elf.dynamic_sections_created;
5085 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5086 || (info->shared
5087 && SYMBOL_REFERENCES_LOCAL (info, h)))
5088 /* This is actually a static link, or it is a
5089 -Bsymbolic link and the symbol is defined
5090 locally, or the symbol was forced to be local
5091 because of a version file. */
5092 ;
5093 else
5094 {
5095 indx = h->dynindx;
5096 unresolved_reloc = FALSE;
5097 }
5098 offp = &h->got.offset;
5099 }
5100 else
5101 {
5102 if (local_got_offsets == NULL)
5103 abort ();
5104 offp = &local_got_offsets[r_symndx];
5105 }
5106
5107 /* The offset must always be a multiple of 4. We use the
5108 least significant bit to record whether we have already
5109 processed this entry. */
5110 off = *offp;
5111 if ((off & 1) != 0)
5112 off &= ~1;
5113 else
5114 {
5115 unsigned int tls_m = (tls_mask
5116 & (TLS_LD | TLS_GD | TLS_DTPREL
5117 | TLS_TPREL | TLS_TPRELGD));
5118
5119 if (offp == &htab->tlsld_got.offset)
5120 tls_m = TLS_LD;
5121 else if (h == NULL
5122 || !(h->elf_link_hash_flags
5123 & ELF_LINK_HASH_DEF_DYNAMIC))
5124 tls_m &= ~TLS_LD;
5125
5126 /* We might have multiple got entries for this sym.
5127 Initialize them all. */
5128 do
5129 {
5130 int tls_ty = 0;
5131
5132 if ((tls_m & TLS_LD) != 0)
5133 {
5134 tls_ty = TLS_TLS | TLS_LD;
5135 tls_m &= ~TLS_LD;
5136 }
5137 else if ((tls_m & TLS_GD) != 0)
5138 {
5139 tls_ty = TLS_TLS | TLS_GD;
5140 tls_m &= ~TLS_GD;
5141 }
5142 else if ((tls_m & TLS_DTPREL) != 0)
5143 {
5144 tls_ty = TLS_TLS | TLS_DTPREL;
5145 tls_m &= ~TLS_DTPREL;
5146 }
5147 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5148 {
5149 tls_ty = TLS_TLS | TLS_TPREL;
5150 tls_m = 0;
5151 }
5152
5153 /* Generate relocs for the dynamic linker. */
5154 if ((info->shared || indx != 0)
5155 && (h == NULL
5156 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5157 || h->root.type != bfd_link_hash_undefweak))
5158 {
5159 outrel.r_offset = (htab->got->output_section->vma
5160 + htab->got->output_offset
5161 + off);
5162 outrel.r_addend = 0;
5163 if (tls_ty & (TLS_LD | TLS_GD))
5164 {
5165 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5166 if (tls_ty == (TLS_TLS | TLS_GD))
5167 {
5168 loc = htab->relgot->contents;
5169 loc += (htab->relgot->reloc_count++
5170 * sizeof (Elf32_External_Rela));
5171 bfd_elf32_swap_reloca_out (output_bfd,
5172 &outrel, loc);
5173 outrel.r_offset += 4;
5174 outrel.r_info
5175 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5176 }
5177 }
5178 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5179 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5180 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5181 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5182 else if (indx == 0)
5183 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5184 else
5185 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5186 if (indx == 0)
5187 {
5188 outrel.r_addend += relocation;
5189 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5190 outrel.r_addend -= htab->tls_sec->vma;
5191 }
5192 loc = htab->relgot->contents;
5193 loc += (htab->relgot->reloc_count++
5194 * sizeof (Elf32_External_Rela));
5195 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5196 }
5197
5198 /* Init the .got section contents if we're not
5199 emitting a reloc. */
5200 else
5201 {
5202 bfd_vma value = relocation;
5203
5204 if (tls_ty == (TLS_TLS | TLS_LD))
5205 value = 1;
5206 else if (tls_ty != 0)
5207 {
5208 value -= htab->tls_sec->vma + DTP_OFFSET;
5209 if (tls_ty == (TLS_TLS | TLS_TPREL))
5210 value += DTP_OFFSET - TP_OFFSET;
5211
5212 if (tls_ty == (TLS_TLS | TLS_GD))
5213 {
5214 bfd_put_32 (output_bfd, value,
5215 htab->got->contents + off + 4);
5216 value = 1;
5217 }
5218 }
5219 bfd_put_32 (output_bfd, value,
5220 htab->got->contents + off);
5221 }
5222
5223 off += 4;
5224 if (tls_ty & (TLS_LD | TLS_GD))
5225 off += 4;
5226 }
5227 while (tls_m != 0);
5228
5229 off = *offp;
5230 *offp = off | 1;
5231 }
5232
5233 if (off >= (bfd_vma) -2)
5234 abort ();
5235
5236 if ((tls_type & TLS_TLS) != 0)
5237 {
5238 if (tls_type != (TLS_TLS | TLS_LD))
5239 {
5240 if ((tls_mask & TLS_LD) != 0
5241 && !(h == NULL
5242 || !(h->elf_link_hash_flags
5243 & ELF_LINK_HASH_DEF_DYNAMIC)))
5244 off += 8;
5245 if (tls_type != (TLS_TLS | TLS_GD))
5246 {
5247 if ((tls_mask & TLS_GD) != 0)
5248 off += 8;
5249 if (tls_type != (TLS_TLS | TLS_DTPREL))
5250 {
5251 if ((tls_mask & TLS_DTPREL) != 0)
5252 off += 4;
5253 }
5254 }
5255 }
5256 }
5257
5258 relocation = htab->got->output_offset + off - 4;
5259
5260 /* Addends on got relocations don't make much sense.
5261 x+off@got is actually x@got+off, and since the got is
5262 generated by a hash table traversal, the value in the
5263 got at entry m+n bears little relation to the entry m. */
5264 if (addend != 0)
5265 (*_bfd_error_handler)
5266 (_("%s(%s+0x%lx): non-zero addend on %s reloc against `%s'"),
5267 bfd_archive_filename (input_bfd),
5268 bfd_get_section_name (input_bfd, input_section),
5269 (long) rel->r_offset,
5270 howto->name,
5271 sym_name);
5272 }
5273 break;
5274
5275 /* Relocations that need no special processing. */
5276 case R_PPC_LOCAL24PC:
5277 /* It makes no sense to point a local relocation
5278 at a symbol not in this object. */
5279 if (unresolved_reloc)
5280 {
5281 if (! (*info->callbacks->undefined_symbol) (info,
5282 h->root.root.string,
5283 input_bfd,
5284 input_section,
5285 rel->r_offset,
5286 TRUE))
5287 return FALSE;
5288 continue;
5289 }
5290 break;
5291
5292 case R_PPC_DTPREL16:
5293 case R_PPC_DTPREL16_LO:
5294 case R_PPC_DTPREL16_HI:
5295 case R_PPC_DTPREL16_HA:
5296 addend -= htab->tls_sec->vma + DTP_OFFSET;
5297 break;
5298
5299 /* Relocations that may need to be propagated if this is a shared
5300 object. */
5301 case R_PPC_TPREL16:
5302 case R_PPC_TPREL16_LO:
5303 case R_PPC_TPREL16_HI:
5304 case R_PPC_TPREL16_HA:
5305 addend -= htab->tls_sec->vma + TP_OFFSET;
5306 /* The TPREL16 relocs shouldn't really be used in shared
5307 libs as they will result in DT_TEXTREL being set, but
5308 support them anyway. */
5309 goto dodyn;
5310
5311 case R_PPC_TPREL32:
5312 addend -= htab->tls_sec->vma + TP_OFFSET;
5313 goto dodyn;
5314
5315 case R_PPC_DTPREL32:
5316 addend -= htab->tls_sec->vma + DTP_OFFSET;
5317 goto dodyn;
5318
5319 case R_PPC_DTPMOD32:
5320 relocation = 1;
5321 addend = 0;
5322 goto dodyn;
5323
5324 case R_PPC_REL24:
5325 case R_PPC_REL32:
5326 case R_PPC_REL14:
5327 case R_PPC_REL14_BRTAKEN:
5328 case R_PPC_REL14_BRNTAKEN:
5329 /* If these relocations are not to a named symbol, they can be
5330 handled right here, no need to bother the dynamic linker. */
5331 if (SYMBOL_REFERENCES_LOCAL (info, h)
5332 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5333 break;
5334 /* fall through */
5335
5336 /* Relocations that always need to be propagated if this is a shared
5337 object. */
5338 case R_PPC_ADDR32:
5339 case R_PPC_ADDR24:
5340 case R_PPC_ADDR16:
5341 case R_PPC_ADDR16_LO:
5342 case R_PPC_ADDR16_HI:
5343 case R_PPC_ADDR16_HA:
5344 case R_PPC_ADDR14:
5345 case R_PPC_ADDR14_BRTAKEN:
5346 case R_PPC_ADDR14_BRNTAKEN:
5347 case R_PPC_UADDR32:
5348 case R_PPC_UADDR16:
5349 /* r_symndx will be zero only for relocs against symbols
5350 from removed linkonce sections, or sections discarded by
5351 a linker script. */
5352 dodyn:
5353 if (r_symndx == 0)
5354 break;
5355 /* Fall thru. */
5356
5357 if ((info->shared
5358 && (h == NULL
5359 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5360 || h->root.type != bfd_link_hash_undefweak)
5361 && (MUST_BE_DYN_RELOC (r_type)
5362 || !SYMBOL_CALLS_LOCAL (info, h)))
5363 || (ELIMINATE_COPY_RELOCS
5364 && !info->shared
5365 && (input_section->flags & SEC_ALLOC) != 0
5366 && h != NULL
5367 && h->dynindx != -1
5368 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5369 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5370 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
5371 {
5372 int skip;
5373
5374 #ifdef DEBUG
5375 fprintf (stderr, "ppc_elf_relocate_section needs to "
5376 "create relocation for %s\n",
5377 (h && h->root.root.string
5378 ? h->root.root.string : "<unknown>"));
5379 #endif
5380
5381 /* When generating a shared object, these relocations
5382 are copied into the output file to be resolved at run
5383 time. */
5384 if (sreloc == NULL)
5385 {
5386 const char *name;
5387
5388 name = (bfd_elf_string_from_elf_section
5389 (input_bfd,
5390 elf_elfheader (input_bfd)->e_shstrndx,
5391 elf_section_data (input_section)->rel_hdr.sh_name));
5392 if (name == NULL)
5393 return FALSE;
5394
5395 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
5396 && strcmp (bfd_get_section_name (input_bfd,
5397 input_section),
5398 name + 5) == 0);
5399
5400 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
5401 BFD_ASSERT (sreloc != NULL);
5402 }
5403
5404 skip = 0;
5405
5406 outrel.r_offset =
5407 _bfd_elf_section_offset (output_bfd, info, input_section,
5408 rel->r_offset);
5409 if (outrel.r_offset == (bfd_vma) -1
5410 || outrel.r_offset == (bfd_vma) -2)
5411 skip = (int) outrel.r_offset;
5412 outrel.r_offset += (input_section->output_section->vma
5413 + input_section->output_offset);
5414
5415 if (skip)
5416 memset (&outrel, 0, sizeof outrel);
5417 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
5418 {
5419 unresolved_reloc = FALSE;
5420 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5421 outrel.r_addend = rel->r_addend;
5422 }
5423 else
5424 {
5425 outrel.r_addend = relocation + rel->r_addend;
5426
5427 if (r_type == R_PPC_ADDR32)
5428 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
5429 else
5430 {
5431 long indx;
5432
5433 if (bfd_is_abs_section (sec))
5434 indx = 0;
5435 else if (sec == NULL || sec->owner == NULL)
5436 {
5437 bfd_set_error (bfd_error_bad_value);
5438 return FALSE;
5439 }
5440 else
5441 {
5442 asection *osec;
5443
5444 /* We are turning this relocation into one
5445 against a section symbol. It would be
5446 proper to subtract the symbol's value,
5447 osec->vma, from the emitted reloc addend,
5448 but ld.so expects buggy relocs. */
5449 osec = sec->output_section;
5450 indx = elf_section_data (osec)->dynindx;
5451 BFD_ASSERT (indx > 0);
5452 #ifdef DEBUG
5453 if (indx <= 0)
5454 printf ("indx=%d section=%s flags=%08x name=%s\n",
5455 indx, osec->name, osec->flags,
5456 h->root.root.string);
5457 #endif
5458 }
5459
5460 outrel.r_info = ELF32_R_INFO (indx, r_type);
5461 }
5462 }
5463
5464 loc = sreloc->contents;
5465 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5466 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5467
5468 if (skip == -1)
5469 continue;
5470
5471 /* This reloc will be computed at runtime. We clear the memory
5472 so that it contains predictable value. */
5473 if (! skip
5474 && ((input_section->flags & SEC_ALLOC) != 0
5475 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
5476 {
5477 relocation = howto->pc_relative ? outrel.r_offset : 0;
5478 addend = 0;
5479 break;
5480 }
5481 }
5482 break;
5483
5484 case R_PPC_RELAX32:
5485 {
5486 unsigned long r_symndx;
5487 Elf_Internal_Sym *sym;
5488 asection *sym_sec;
5489 bfd_byte *hit_addr = 0;
5490 bfd_vma value = 0;
5491
5492 r_symndx = ELF32_R_SYM (rel->r_info);
5493
5494 if (r_symndx < symtab_hdr->sh_info)
5495 {
5496 sym = local_syms + r_symndx;
5497 sym_sec = local_sections[r_symndx];
5498
5499 value = _bfd_elf_rela_local_sym (output_bfd, sym, sym_sec, rel);
5500 }
5501 else
5502 {
5503 long indx;
5504
5505 indx = r_symndx - symtab_hdr->sh_info;
5506 h = elf_sym_hashes (input_bfd)[indx];
5507 while (h->root.type == bfd_link_hash_indirect
5508 || h->root.type == bfd_link_hash_warning)
5509 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5510
5511 value = 0;
5512 if (h->root.type == bfd_link_hash_defined
5513 || h->root.type == bfd_link_hash_defweak)
5514 {
5515 sym_sec = h->root.u.def.section;
5516
5517 /* Detect the cases that sym_sec->output_section is
5518 expected to be NULL -- all cases in which the symbol
5519 is defined in another shared module. This includes
5520 PLT relocs for which we've created a PLT entry and
5521 other relocs for which we're prepared to create
5522 dynamic relocations. */
5523 /* ??? Just accept it NULL and continue. */
5524
5525 if (sym_sec->output_section != NULL)
5526 {
5527 value = (h->root.u.def.value
5528 + sym_sec->output_section->vma
5529 + sym_sec->output_offset);
5530 }
5531 }
5532 else if (!info->executable
5533 && !info->no_undefined
5534 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5535 ;
5536 else
5537 {
5538 if (! ((*info->callbacks->undefined_symbol)
5539 (info, h->root.root.string, input_bfd,
5540 input_section, rel->r_offset,
5541 (info->executable || info->no_undefined
5542 || ELF_ST_VISIBILITY (h->other)))))
5543 return FALSE;
5544 continue;
5545 }
5546 }
5547 hit_addr = contents + rel->r_offset;
5548 value += rel->r_addend;
5549
5550 r = ppc_elf_install_value (output_bfd, hit_addr, value, r_type);
5551 if (r != bfd_reloc_ok)
5552 break;
5553 else
5554 continue;
5555 }
5556
5557 /* Indirect .sdata relocation. */
5558 case R_PPC_EMB_SDAI16:
5559 BFD_ASSERT (htab->sdata != NULL);
5560 relocation
5561 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5562 htab->sdata, h, relocation,
5563 rel, R_PPC_RELATIVE);
5564 break;
5565
5566 /* Indirect .sdata2 relocation. */
5567 case R_PPC_EMB_SDA2I16:
5568 BFD_ASSERT (htab->sdata2 != NULL);
5569 relocation
5570 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5571 htab->sdata2, h, relocation,
5572 rel, R_PPC_RELATIVE);
5573 break;
5574
5575 /* Handle the TOC16 reloc. We want to use the offset within the .got
5576 section, not the actual VMA. This is appropriate when generating
5577 an embedded ELF object, for which the .got section acts like the
5578 AIX .toc section. */
5579 case R_PPC_TOC16: /* phony GOT16 relocations */
5580 BFD_ASSERT (sec != NULL);
5581 BFD_ASSERT (bfd_is_und_section (sec)
5582 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
5583 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)
5584
5585 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
5586 break;
5587
5588 case R_PPC_PLTREL24:
5589 /* Relocation is to the entry for this symbol in the
5590 procedure linkage table. */
5591 BFD_ASSERT (h != NULL);
5592
5593 if (h->plt.offset == (bfd_vma) -1
5594 || htab->plt == NULL)
5595 {
5596 /* We didn't make a PLT entry for this symbol. This
5597 happens when statically linking PIC code, or when
5598 using -Bsymbolic. */
5599 break;
5600 }
5601
5602 unresolved_reloc = FALSE;
5603 relocation = (htab->plt->output_section->vma
5604 + htab->plt->output_offset
5605 + h->plt.offset);
5606 break;
5607
5608 /* Relocate against _SDA_BASE_. */
5609 case R_PPC_SDAREL16:
5610 {
5611 const char *name;
5612 const struct elf_link_hash_entry *sh;
5613
5614 BFD_ASSERT (sec != NULL);
5615 name = bfd_get_section_name (abfd, sec->output_section);
5616 if (! ((strncmp (name, ".sdata", 6) == 0
5617 && (name[6] == 0 || name[6] == '.'))
5618 || (strncmp (name, ".sbss", 5) == 0
5619 && (name[5] == 0 || name[5] == '.'))))
5620 {
5621 (*_bfd_error_handler)
5622 (_("%s: the target (%s) of a %s relocation is "
5623 "in the wrong output section (%s)"),
5624 bfd_archive_filename (input_bfd),
5625 sym_name,
5626 howto->name,
5627 name);
5628 }
5629 sh = htab->sdata->sym_hash;
5630 addend -= (sh->root.u.def.value
5631 + sh->root.u.def.section->output_section->vma
5632 + sh->root.u.def.section->output_offset);
5633 }
5634 break;
5635
5636 /* Relocate against _SDA2_BASE_. */
5637 case R_PPC_EMB_SDA2REL:
5638 {
5639 const char *name;
5640 const struct elf_link_hash_entry *sh;
5641
5642 BFD_ASSERT (sec != NULL);
5643 name = bfd_get_section_name (abfd, sec->output_section);
5644 if (! (strncmp (name, ".sdata2", 7) == 0
5645 || strncmp (name, ".sbss2", 6) == 0))
5646 {
5647 (*_bfd_error_handler)
5648 (_("%s: the target (%s) of a %s relocation is "
5649 "in the wrong output section (%s)"),
5650 bfd_archive_filename (input_bfd),
5651 sym_name,
5652 howto->name,
5653 name);
5654
5655 bfd_set_error (bfd_error_bad_value);
5656 ret = FALSE;
5657 continue;
5658 }
5659 sh = htab->sdata2->sym_hash;
5660 addend -= (sh->root.u.def.value
5661 + sh->root.u.def.section->output_section->vma
5662 + sh->root.u.def.section->output_offset);
5663 }
5664 break;
5665
5666 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
5667 case R_PPC_EMB_SDA21:
5668 case R_PPC_EMB_RELSDA:
5669 {
5670 const char *name;
5671 const struct elf_link_hash_entry *sh;
5672 int reg;
5673
5674 BFD_ASSERT (sec != NULL);
5675 name = bfd_get_section_name (abfd, sec->output_section);
5676 if (((strncmp (name, ".sdata", 6) == 0
5677 && (name[6] == 0 || name[6] == '.'))
5678 || (strncmp (name, ".sbss", 5) == 0
5679 && (name[5] == 0 || name[5] == '.'))))
5680 {
5681 reg = 13;
5682 sh = htab->sdata->sym_hash;
5683 addend -= (sh->root.u.def.value
5684 + sh->root.u.def.section->output_section->vma
5685 + sh->root.u.def.section->output_offset);
5686 }
5687
5688 else if (strncmp (name, ".sdata2", 7) == 0
5689 || strncmp (name, ".sbss2", 6) == 0)
5690 {
5691 reg = 2;
5692 sh = htab->sdata2->sym_hash;
5693 addend -= (sh->root.u.def.value
5694 + sh->root.u.def.section->output_section->vma
5695 + sh->root.u.def.section->output_offset);
5696 }
5697
5698 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
5699 || strcmp (name, ".PPC.EMB.sbss0") == 0)
5700 {
5701 reg = 0;
5702 }
5703
5704 else
5705 {
5706 (*_bfd_error_handler)
5707 (_("%s: the target (%s) of a %s relocation is "
5708 "in the wrong output section (%s)"),
5709 bfd_archive_filename (input_bfd),
5710 sym_name,
5711 howto->name,
5712 name);
5713
5714 bfd_set_error (bfd_error_bad_value);
5715 ret = FALSE;
5716 continue;
5717 }
5718
5719 if (r_type == R_PPC_EMB_SDA21)
5720 { /* fill in register field */
5721 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5722 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
5723 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5724 }
5725 }
5726 break;
5727
5728 /* Relocate against the beginning of the section. */
5729 case R_PPC_SECTOFF:
5730 case R_PPC_SECTOFF_LO:
5731 case R_PPC_SECTOFF_HI:
5732 case R_PPC_SECTOFF_HA:
5733 BFD_ASSERT (sec != NULL);
5734 addend -= sec->output_section->vma;
5735 break;
5736
5737 /* Negative relocations. */
5738 case R_PPC_EMB_NADDR32:
5739 case R_PPC_EMB_NADDR16:
5740 case R_PPC_EMB_NADDR16_LO:
5741 case R_PPC_EMB_NADDR16_HI:
5742 case R_PPC_EMB_NADDR16_HA:
5743 addend -= 2 * relocation;
5744 break;
5745
5746 case R_PPC_COPY:
5747 case R_PPC_GLOB_DAT:
5748 case R_PPC_JMP_SLOT:
5749 case R_PPC_RELATIVE:
5750 case R_PPC_PLT32:
5751 case R_PPC_PLTREL32:
5752 case R_PPC_PLT16_LO:
5753 case R_PPC_PLT16_HI:
5754 case R_PPC_PLT16_HA:
5755 case R_PPC_ADDR30:
5756 case R_PPC_EMB_RELSEC16:
5757 case R_PPC_EMB_RELST_LO:
5758 case R_PPC_EMB_RELST_HI:
5759 case R_PPC_EMB_RELST_HA:
5760 case R_PPC_EMB_BIT_FLD:
5761 (*_bfd_error_handler)
5762 (_("%s: relocation %s is not yet supported for symbol %s."),
5763 bfd_archive_filename (input_bfd),
5764 howto->name,
5765 sym_name);
5766
5767 bfd_set_error (bfd_error_invalid_operation);
5768 ret = FALSE;
5769 continue;
5770 }
5771
5772 /* Do any further special processing. */
5773 switch (r_type)
5774 {
5775 default:
5776 break;
5777
5778 case R_PPC_ADDR16_HA:
5779 case R_PPC_GOT16_HA:
5780 case R_PPC_PLT16_HA:
5781 case R_PPC_SECTOFF_HA:
5782 case R_PPC_TPREL16_HA:
5783 case R_PPC_DTPREL16_HA:
5784 case R_PPC_GOT_TLSGD16_HA:
5785 case R_PPC_GOT_TLSLD16_HA:
5786 case R_PPC_GOT_TPREL16_HA:
5787 case R_PPC_GOT_DTPREL16_HA:
5788 case R_PPC_EMB_NADDR16_HA:
5789 case R_PPC_EMB_RELST_HA:
5790 /* It's just possible that this symbol is a weak symbol
5791 that's not actually defined anywhere. In that case,
5792 'sec' would be NULL, and we should leave the symbol
5793 alone (it will be set to zero elsewhere in the link). */
5794 if (sec != NULL)
5795 /* Add 0x10000 if sign bit in 0:15 is set.
5796 Bits 0:15 are not used. */
5797 addend += 0x8000;
5798 break;
5799 }
5800
5801 #ifdef DEBUG
5802 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
5803 "offset = %ld, addend = %ld\n",
5804 howto->name,
5805 (int) r_type,
5806 sym_name,
5807 r_symndx,
5808 (long) rel->r_offset,
5809 (long) addend);
5810 #endif
5811
5812 if (unresolved_reloc
5813 && !((input_section->flags & SEC_DEBUGGING) != 0
5814 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
5815 {
5816 (*_bfd_error_handler)
5817 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
5818 bfd_archive_filename (input_bfd),
5819 bfd_get_section_name (input_bfd, input_section),
5820 (long) rel->r_offset,
5821 howto->name,
5822 sym_name);
5823 ret = FALSE;
5824 }
5825
5826 r = _bfd_final_link_relocate (howto,
5827 input_bfd,
5828 input_section,
5829 contents,
5830 rel->r_offset,
5831 relocation,
5832 addend);
5833
5834 if (r != bfd_reloc_ok)
5835 {
5836 if (sym_name == NULL)
5837 sym_name = "(null)";
5838 if (r == bfd_reloc_overflow)
5839 {
5840 if (warned)
5841 continue;
5842 if (h != NULL
5843 && h->root.type == bfd_link_hash_undefweak
5844 && howto->pc_relative)
5845 {
5846 /* Assume this is a call protected by other code that
5847 detect the symbol is undefined. If this is the case,
5848 we can safely ignore the overflow. If not, the
5849 program is hosed anyway, and a little warning isn't
5850 going to help. */
5851
5852 continue;
5853 }
5854
5855 if (! (*info->callbacks->reloc_overflow) (info,
5856 sym_name,
5857 howto->name,
5858 rel->r_addend,
5859 input_bfd,
5860 input_section,
5861 rel->r_offset))
5862 return FALSE;
5863 }
5864 else
5865 {
5866 (*_bfd_error_handler)
5867 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
5868 bfd_archive_filename (input_bfd),
5869 bfd_get_section_name (input_bfd, input_section),
5870 (long) rel->r_offset, howto->name, sym_name, (int) r);
5871 ret = FALSE;
5872 }
5873 }
5874 }
5875
5876 #ifdef DEBUG
5877 fprintf (stderr, "\n");
5878 #endif
5879
5880 return ret;
5881 }
5882
5883 static enum elf_reloc_type_class
5884 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
5885 {
5886 switch (ELF32_R_TYPE (rela->r_info))
5887 {
5888 case R_PPC_RELATIVE:
5889 return reloc_class_relative;
5890 case R_PPC_REL24:
5891 case R_PPC_ADDR24:
5892 case R_PPC_JMP_SLOT:
5893 return reloc_class_plt;
5894 case R_PPC_COPY:
5895 return reloc_class_copy;
5896 default:
5897 return reloc_class_normal;
5898 }
5899 }
5900 \f
5901 /* Support for core dump NOTE sections. */
5902
5903 static bfd_boolean
5904 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
5905 {
5906 int offset;
5907 unsigned int raw_size;
5908
5909 switch (note->descsz)
5910 {
5911 default:
5912 return FALSE;
5913
5914 case 268: /* Linux/PPC. */
5915 /* pr_cursig */
5916 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
5917
5918 /* pr_pid */
5919 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
5920
5921 /* pr_reg */
5922 offset = 72;
5923 raw_size = 192;
5924
5925 break;
5926 }
5927
5928 /* Make a ".reg/999" section. */
5929 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
5930 raw_size, note->descpos + offset);
5931 }
5932
5933 static bfd_boolean
5934 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
5935 {
5936 switch (note->descsz)
5937 {
5938 default:
5939 return FALSE;
5940
5941 case 128: /* Linux/PPC elf_prpsinfo. */
5942 elf_tdata (abfd)->core_program
5943 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
5944 elf_tdata (abfd)->core_command
5945 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
5946 }
5947
5948 /* Note that for some reason, a spurious space is tacked
5949 onto the end of the args in some (at least one anyway)
5950 implementations, so strip it off if it exists. */
5951
5952 {
5953 char *command = elf_tdata (abfd)->core_command;
5954 int n = strlen (command);
5955
5956 if (0 < n && command[n - 1] == ' ')
5957 command[n - 1] = '\0';
5958 }
5959
5960 return TRUE;
5961 }
5962 \f
5963 /* Very simple linked list structure for recording apuinfo values. */
5964 typedef struct apuinfo_list
5965 {
5966 struct apuinfo_list *next;
5967 unsigned long value;
5968 }
5969 apuinfo_list;
5970
5971 static apuinfo_list *head;
5972
5973
5974 static void
5975 apuinfo_list_init (void)
5976 {
5977 head = NULL;
5978 }
5979
5980 static void
5981 apuinfo_list_add (unsigned long value)
5982 {
5983 apuinfo_list *entry = head;
5984
5985 while (entry != NULL)
5986 {
5987 if (entry->value == value)
5988 return;
5989 entry = entry->next;
5990 }
5991
5992 entry = bfd_malloc (sizeof (* entry));
5993 if (entry == NULL)
5994 return;
5995
5996 entry->value = value;
5997 entry->next = head;
5998 head = entry;
5999 }
6000
6001 static unsigned
6002 apuinfo_list_length (void)
6003 {
6004 apuinfo_list *entry;
6005 unsigned long count;
6006
6007 for (entry = head, count = 0;
6008 entry;
6009 entry = entry->next)
6010 ++ count;
6011
6012 return count;
6013 }
6014
6015 static inline unsigned long
6016 apuinfo_list_element (unsigned long number)
6017 {
6018 apuinfo_list * entry;
6019
6020 for (entry = head;
6021 entry && number --;
6022 entry = entry->next)
6023 ;
6024
6025 return entry ? entry->value : 0;
6026 }
6027
6028 static void
6029 apuinfo_list_finish (void)
6030 {
6031 apuinfo_list *entry;
6032
6033 for (entry = head; entry;)
6034 {
6035 apuinfo_list *next = entry->next;
6036 free (entry);
6037 entry = next;
6038 }
6039
6040 head = NULL;
6041 }
6042
6043 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
6044 #define APUINFO_LABEL "APUinfo"
6045
6046 /* Scan the input BFDs and create a linked list of
6047 the APUinfo values that will need to be emitted. */
6048
6049 static void
6050 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
6051 {
6052 bfd *ibfd;
6053 asection *asec;
6054 char *buffer;
6055 unsigned num_input_sections;
6056 bfd_size_type output_section_size;
6057 unsigned i;
6058 unsigned num_entries;
6059 unsigned long offset;
6060 unsigned long length;
6061 const char *error_message = NULL;
6062
6063 if (link_info == NULL)
6064 return;
6065
6066 /* Scan the input bfds, looking for apuinfo sections. */
6067 num_input_sections = 0;
6068 output_section_size = 0;
6069
6070 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
6071 {
6072 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
6073 if (asec)
6074 {
6075 ++ num_input_sections;
6076 output_section_size += asec->_raw_size;
6077 }
6078 }
6079
6080 /* We need at least one input sections
6081 in order to make merging worthwhile. */
6082 if (num_input_sections < 1)
6083 return;
6084
6085 /* Just make sure that the output section exists as well. */
6086 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6087 if (asec == NULL)
6088 return;
6089
6090 /* Allocate a buffer for the contents of the input sections. */
6091 buffer = bfd_malloc (output_section_size);
6092 if (buffer == NULL)
6093 return;
6094
6095 offset = 0;
6096 apuinfo_list_init ();
6097
6098 /* Read in the input sections contents. */
6099 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
6100 {
6101 unsigned long datum;
6102 char *ptr;
6103
6104 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
6105 if (asec == NULL)
6106 continue;
6107
6108 length = asec->_raw_size;
6109 if (length < 24)
6110 {
6111 error_message = _("corrupt or empty %s section in %s");
6112 goto fail;
6113 }
6114
6115 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
6116 || (bfd_bread (buffer + offset, length, ibfd) != length))
6117 {
6118 error_message = _("unable to read in %s section from %s");
6119 goto fail;
6120 }
6121
6122 /* Process the contents of the section. */
6123 ptr = buffer + offset;
6124 error_message = _("corrupt %s section in %s");
6125
6126 /* Verify the contents of the header. Note - we have to
6127 extract the values this way in order to allow for a
6128 host whose endian-ness is different from the target. */
6129 datum = bfd_get_32 (ibfd, ptr);
6130 if (datum != sizeof APUINFO_LABEL)
6131 goto fail;
6132
6133 datum = bfd_get_32 (ibfd, ptr + 8);
6134 if (datum != 0x2)
6135 goto fail;
6136
6137 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
6138 goto fail;
6139
6140 /* Get the number of bytes used for apuinfo entries. */
6141 datum = bfd_get_32 (ibfd, ptr + 4);
6142 if (datum + 20 != length)
6143 goto fail;
6144
6145 /* Make sure that we do not run off the end of the section. */
6146 if (offset + length > output_section_size)
6147 goto fail;
6148
6149 /* Scan the apuinfo section, building a list of apuinfo numbers. */
6150 for (i = 0; i < datum; i += 4)
6151 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
6152
6153 /* Update the offset. */
6154 offset += length;
6155 }
6156
6157 error_message = NULL;
6158
6159 /* Compute the size of the output section. */
6160 num_entries = apuinfo_list_length ();
6161 output_section_size = 20 + num_entries * 4;
6162
6163 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6164
6165 if (! bfd_set_section_size (abfd, asec, output_section_size))
6166 ibfd = abfd,
6167 error_message = _("warning: unable to set size of %s section in %s");
6168
6169 fail:
6170 free (buffer);
6171
6172 if (error_message)
6173 (*_bfd_error_handler) (error_message, APUINFO_SECTION_NAME,
6174 bfd_archive_filename (ibfd));
6175 }
6176
6177
6178 /* Prevent the output section from accumulating the input sections'
6179 contents. We have already stored this in our linked list structure. */
6180
6181 static bfd_boolean
6182 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
6183 asection *asec,
6184 bfd_byte *contents ATTRIBUTE_UNUSED)
6185 {
6186 return (apuinfo_list_length ()
6187 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
6188 }
6189
6190
6191 /* Finally we can generate the output section. */
6192
6193 static void
6194 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
6195 {
6196 bfd_byte *buffer;
6197 asection *asec;
6198 unsigned i;
6199 unsigned num_entries;
6200 bfd_size_type length;
6201
6202 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6203 if (asec == NULL)
6204 return;
6205
6206 if (apuinfo_list_length () == 0)
6207 return;
6208
6209 length = asec->_raw_size;
6210 if (length < 20)
6211 return;
6212
6213 buffer = bfd_malloc (length);
6214 if (buffer == NULL)
6215 {
6216 (*_bfd_error_handler)
6217 (_("failed to allocate space for new APUinfo section."));
6218 return;
6219 }
6220
6221 /* Create the apuinfo header. */
6222 num_entries = apuinfo_list_length ();
6223 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
6224 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
6225 bfd_put_32 (abfd, 0x2, buffer + 8);
6226 strcpy (buffer + 12, APUINFO_LABEL);
6227
6228 length = 20;
6229 for (i = 0; i < num_entries; i++)
6230 {
6231 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
6232 length += 4;
6233 }
6234
6235 if (length != asec->_raw_size)
6236 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
6237
6238 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
6239 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
6240
6241 free (buffer);
6242
6243 apuinfo_list_finish ();
6244 }
6245
6246 /* Add extra PPC sections -- Note, for now, make .sbss2 and
6247 .PPC.EMB.sbss0 a normal section, and not a bss section so
6248 that the linker doesn't crater when trying to make more than
6249 2 sections. */
6250
6251 static struct bfd_elf_special_section const ppc_elf_special_sections[]=
6252 {
6253 { ".tags", 0, NULL, 0,
6254 SHT_ORDERED, SHF_ALLOC },
6255 { ".sdata", 0, NULL, 0,
6256 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
6257 { ".sbss", 0, NULL, 0,
6258 SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
6259 { ".sdata2", 0, NULL, 0,
6260 SHT_PROGBITS, SHF_ALLOC },
6261 { ".sbss2", 0, NULL, 0,
6262 SHT_PROGBITS, SHF_ALLOC },
6263 { ".PPC.EMB.apuinfo", 0, NULL, 0,
6264 SHT_NOTE, 0 },
6265 { ".PPC.EMB.sdata0", 0, NULL, 0,
6266 SHT_PROGBITS, SHF_ALLOC },
6267 { ".PPC.EMB.sbss0", 0, NULL, 0,
6268 SHT_PROGBITS, SHF_ALLOC },
6269 { ".plt", 0, NULL, 0,
6270 SHT_NOBITS, 0 },
6271 { NULL, 0, NULL, 0,
6272 0, 0 }
6273 };
6274 \f
6275 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
6276 #define TARGET_LITTLE_NAME "elf32-powerpcle"
6277 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
6278 #define TARGET_BIG_NAME "elf32-powerpc"
6279 #define ELF_ARCH bfd_arch_powerpc
6280 #define ELF_MACHINE_CODE EM_PPC
6281 #ifdef __QNXTARGET__
6282 #define ELF_MAXPAGESIZE 0x1000
6283 #else
6284 #define ELF_MAXPAGESIZE 0x10000
6285 #endif
6286 #define elf_info_to_howto ppc_elf_info_to_howto
6287
6288 #ifdef EM_CYGNUS_POWERPC
6289 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6290 #endif
6291
6292 #ifdef EM_PPC_OLD
6293 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6294 #endif
6295
6296 #define elf_backend_plt_not_loaded 1
6297 #define elf_backend_got_symbol_offset 4
6298 #define elf_backend_can_gc_sections 1
6299 #define elf_backend_can_refcount 1
6300 #define elf_backend_got_header_size 12
6301 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
6302 #define elf_backend_rela_normal 1
6303
6304 #define bfd_elf32_mkobject ppc_elf_mkobject
6305 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
6306 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
6307 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
6308 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
6309 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
6310
6311 #define elf_backend_object_p ppc_elf_object_p
6312 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
6313 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
6314 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
6315 #define elf_backend_relocate_section ppc_elf_relocate_section
6316 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
6317 #define elf_backend_check_relocs ppc_elf_check_relocs
6318 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
6319 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
6320 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
6321 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
6322 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
6323 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
6324 #define elf_backend_fake_sections ppc_elf_fake_sections
6325 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
6326 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
6327 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
6328 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
6329 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
6330 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
6331 #define elf_backend_final_write_processing ppc_elf_final_write_processing
6332 #define elf_backend_write_section ppc_elf_write_section
6333 #define elf_backend_special_sections ppc_elf_special_sections
6334
6335 #include "elf32-target.h"
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