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2004-01-30 H.J. Lu <hongjiu.lu@intel.com>
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc.h"
34 #include "elf32-ppc.h"
35
36 /* RELA relocations are used here. */
37
38 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc_elf_unhandled_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42
43 /* Branch prediction bit for branch taken relocs. */
44 #define BRANCH_PREDICT_BIT 0x200000
45 /* Mask to set RA in memory instructions. */
46 #define RA_REGISTER_MASK 0x001f0000
47 /* Value to shift register by to insert RA. */
48 #define RA_REGISTER_SHIFT 16
49
50 /* The name of the dynamic interpreter. This is put in the .interp
51 section. */
52 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
53
54 /* The size in bytes of an entry in the procedure linkage table. */
55 #define PLT_ENTRY_SIZE 12
56 /* The initial size of the plt reserved for the dynamic linker. */
57 #define PLT_INITIAL_ENTRY_SIZE 72
58 /* The size of the gap between entries in the PLT. */
59 #define PLT_SLOT_SIZE 8
60 /* The number of single-slot PLT entries (the rest use two slots). */
61 #define PLT_NUM_SINGLE_ENTRIES 8192
62
63 /* Some nop instructions. */
64 #define NOP 0x60000000
65 #define CROR_151515 0x4def7b82
66 #define CROR_313131 0x4ffffb82
67
68 /* Offset of tp and dtp pointers from start of TLS block. */
69 #define TP_OFFSET 0x7000
70 #define DTP_OFFSET 0x8000
71
72 \f
73 /* Enumeration to specify the special section. */
74 enum elf_linker_section_enum
75 {
76 LINKER_SECTION_SDATA,
77 LINKER_SECTION_SDATA2
78 };
79
80 /* Sections created by the linker. */
81
82 typedef struct elf_linker_section
83 {
84 /* pointer to the section */
85 asection *section;
86 /* pointer to the relocations needed for this section */
87 asection *rel_section;
88 /* pointer to the created symbol hash value */
89 struct elf_link_hash_entry *sym_hash;
90 /* offset of symbol from beginning of section */
91 bfd_vma sym_offset;
92 } elf_linker_section_t;
93
94 /* Linked list of allocated pointer entries. This hangs off of the
95 symbol lists, and provides allows us to return different pointers,
96 based on different addend's. */
97
98 typedef struct elf_linker_section_pointers
99 {
100 /* next allocated pointer for this symbol */
101 struct elf_linker_section_pointers *next;
102 /* offset of pointer from beginning of section */
103 bfd_vma offset;
104 /* addend used */
105 bfd_vma addend;
106 /* which linker section this is */
107 elf_linker_section_t *lsect;
108 /* whether address was written yet */
109 bfd_boolean written_address_p;
110 } elf_linker_section_pointers_t;
111
112 struct ppc_elf_obj_tdata
113 {
114 struct elf_obj_tdata elf;
115
116 /* A mapping from local symbols to offsets into the various linker
117 sections added. This is index by the symbol index. */
118 elf_linker_section_pointers_t **linker_section_pointers;
119 };
120
121 #define ppc_elf_tdata(bfd) \
122 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
123
124 #define elf_local_ptr_offsets(bfd) \
125 (ppc_elf_tdata (bfd)->linker_section_pointers)
126
127 /* Override the generic function because we store some extras. */
128
129 static bfd_boolean
130 ppc_elf_mkobject (bfd *abfd)
131 {
132 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
133 abfd->tdata.any = bfd_zalloc (abfd, amt);
134 if (abfd->tdata.any == NULL)
135 return FALSE;
136 return TRUE;
137 }
138
139 /* The PPC linker needs to keep track of the number of relocs that it
140 decides to copy as dynamic relocs in check_relocs for each symbol.
141 This is so that it can later discard them if they are found to be
142 unnecessary. We store the information in a field extending the
143 regular ELF linker hash table. */
144
145 struct ppc_elf_dyn_relocs
146 {
147 struct ppc_elf_dyn_relocs *next;
148
149 /* The input section of the reloc. */
150 asection *sec;
151
152 /* Total number of relocs copied for the input section. */
153 bfd_size_type count;
154
155 /* Number of pc-relative relocs copied for the input section. */
156 bfd_size_type pc_count;
157 };
158
159 /* PPC ELF linker hash entry. */
160
161 struct ppc_elf_link_hash_entry
162 {
163 struct elf_link_hash_entry elf;
164
165 /* If this symbol is used in the linker created sections, the processor
166 specific backend uses this field to map the field into the offset
167 from the beginning of the section. */
168 elf_linker_section_pointers_t *linker_section_pointer;
169
170 /* Track dynamic relocs copied for this symbol. */
171 struct ppc_elf_dyn_relocs *dyn_relocs;
172
173 /* Contexts in which symbol is used in the GOT (or TOC).
174 TLS_GD .. TLS_TLS bits are or'd into the mask as the
175 corresponding relocs are encountered during check_relocs.
176 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
177 indicate the corresponding GOT entry type is not needed. */
178 #define TLS_GD 1 /* GD reloc. */
179 #define TLS_LD 2 /* LD reloc. */
180 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
181 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
182 #define TLS_TLS 16 /* Any TLS reloc. */
183 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
184 char tls_mask;
185 };
186
187 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
188
189 /* PPC ELF linker hash table. */
190
191 struct ppc_elf_link_hash_table
192 {
193 struct elf_link_hash_table elf;
194
195 /* Short-cuts to get to dynamic linker sections. */
196 asection *got;
197 asection *relgot;
198 asection *plt;
199 asection *relplt;
200 asection *dynbss;
201 asection *relbss;
202 asection *dynsbss;
203 asection *relsbss;
204 elf_linker_section_t *sdata;
205 elf_linker_section_t *sdata2;
206 asection *sbss;
207
208 /* Shortcut to .__tls_get_addr. */
209 struct elf_link_hash_entry *tls_get_addr;
210
211 /* TLS local dynamic got entry handling. */
212 union {
213 bfd_signed_vma refcount;
214 bfd_vma offset;
215 } tlsld_got;
216
217 /* Small local sym to section mapping cache. */
218 struct sym_sec_cache sym_sec;
219 };
220
221 /* Get the PPC ELF linker hash table from a link_info structure. */
222
223 #define ppc_elf_hash_table(p) \
224 ((struct ppc_elf_link_hash_table *) (p)->hash)
225
226 /* Create an entry in a PPC ELF linker hash table. */
227
228 static struct bfd_hash_entry *
229 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
230 struct bfd_hash_table *table,
231 const char *string)
232 {
233 /* Allocate the structure if it has not already been allocated by a
234 subclass. */
235 if (entry == NULL)
236 {
237 entry = bfd_hash_allocate (table,
238 sizeof (struct ppc_elf_link_hash_entry));
239 if (entry == NULL)
240 return entry;
241 }
242
243 /* Call the allocation method of the superclass. */
244 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
245 if (entry != NULL)
246 {
247 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
248 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
249 ppc_elf_hash_entry (entry)->tls_mask = 0;
250 }
251
252 return entry;
253 }
254
255 /* Create a PPC ELF linker hash table. */
256
257 static struct bfd_link_hash_table *
258 ppc_elf_link_hash_table_create (bfd *abfd)
259 {
260 struct ppc_elf_link_hash_table *ret;
261
262 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
263 if (ret == NULL)
264 return NULL;
265
266 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
267 ppc_elf_link_hash_newfunc))
268 {
269 free (ret);
270 return NULL;
271 }
272
273 return &ret->elf.root;
274 }
275
276 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
277 copying dynamic variables from a shared lib into an app's dynbss
278 section, and instead use a dynamic relocation to point into the
279 shared lib. */
280 #define ELIMINATE_COPY_RELOCS 1
281
282 /* Copy the extra info we tack onto an elf_link_hash_entry. */
283
284 static void
285 ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed,
286 struct elf_link_hash_entry *dir,
287 struct elf_link_hash_entry *ind)
288 {
289 struct ppc_elf_link_hash_entry *edir, *eind;
290
291 edir = (struct ppc_elf_link_hash_entry *) dir;
292 eind = (struct ppc_elf_link_hash_entry *) ind;
293
294 if (eind->dyn_relocs != NULL)
295 {
296 if (edir->dyn_relocs != NULL)
297 {
298 struct ppc_elf_dyn_relocs **pp;
299 struct ppc_elf_dyn_relocs *p;
300
301 if (ind->root.type == bfd_link_hash_indirect)
302 abort ();
303
304 /* Add reloc counts against the weak sym to the strong sym
305 list. Merge any entries against the same section. */
306 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
307 {
308 struct ppc_elf_dyn_relocs *q;
309
310 for (q = edir->dyn_relocs; q != NULL; q = q->next)
311 if (q->sec == p->sec)
312 {
313 q->pc_count += p->pc_count;
314 q->count += p->count;
315 *pp = p->next;
316 break;
317 }
318 if (q == NULL)
319 pp = &p->next;
320 }
321 *pp = edir->dyn_relocs;
322 }
323
324 edir->dyn_relocs = eind->dyn_relocs;
325 eind->dyn_relocs = NULL;
326 }
327
328 edir->tls_mask |= eind->tls_mask;
329
330 if (ELIMINATE_COPY_RELOCS
331 && ind->root.type != bfd_link_hash_indirect
332 && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
333 /* If called to transfer flags for a weakdef during processing
334 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
335 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
336 dir->elf_link_hash_flags |=
337 (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
338 | ELF_LINK_HASH_REF_REGULAR
339 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
340 | ELF_LINK_HASH_NEEDS_PLT));
341 else
342 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
343 }
344 \f
345 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
346
347 static reloc_howto_type ppc_elf_howto_raw[] = {
348 /* This reloc does nothing. */
349 HOWTO (R_PPC_NONE, /* type */
350 0, /* rightshift */
351 2, /* size (0 = byte, 1 = short, 2 = long) */
352 32, /* bitsize */
353 FALSE, /* pc_relative */
354 0, /* bitpos */
355 complain_overflow_bitfield, /* complain_on_overflow */
356 bfd_elf_generic_reloc, /* special_function */
357 "R_PPC_NONE", /* name */
358 FALSE, /* partial_inplace */
359 0, /* src_mask */
360 0, /* dst_mask */
361 FALSE), /* pcrel_offset */
362
363 /* A standard 32 bit relocation. */
364 HOWTO (R_PPC_ADDR32, /* type */
365 0, /* rightshift */
366 2, /* size (0 = byte, 1 = short, 2 = long) */
367 32, /* bitsize */
368 FALSE, /* pc_relative */
369 0, /* bitpos */
370 complain_overflow_bitfield, /* complain_on_overflow */
371 bfd_elf_generic_reloc, /* special_function */
372 "R_PPC_ADDR32", /* name */
373 FALSE, /* partial_inplace */
374 0, /* src_mask */
375 0xffffffff, /* dst_mask */
376 FALSE), /* pcrel_offset */
377
378 /* An absolute 26 bit branch; the lower two bits must be zero.
379 FIXME: we don't check that, we just clear them. */
380 HOWTO (R_PPC_ADDR24, /* type */
381 0, /* rightshift */
382 2, /* size (0 = byte, 1 = short, 2 = long) */
383 26, /* bitsize */
384 FALSE, /* pc_relative */
385 0, /* bitpos */
386 complain_overflow_bitfield, /* complain_on_overflow */
387 bfd_elf_generic_reloc, /* special_function */
388 "R_PPC_ADDR24", /* name */
389 FALSE, /* partial_inplace */
390 0, /* src_mask */
391 0x3fffffc, /* dst_mask */
392 FALSE), /* pcrel_offset */
393
394 /* A standard 16 bit relocation. */
395 HOWTO (R_PPC_ADDR16, /* type */
396 0, /* rightshift */
397 1, /* size (0 = byte, 1 = short, 2 = long) */
398 16, /* bitsize */
399 FALSE, /* pc_relative */
400 0, /* bitpos */
401 complain_overflow_bitfield, /* complain_on_overflow */
402 bfd_elf_generic_reloc, /* special_function */
403 "R_PPC_ADDR16", /* name */
404 FALSE, /* partial_inplace */
405 0, /* src_mask */
406 0xffff, /* dst_mask */
407 FALSE), /* pcrel_offset */
408
409 /* A 16 bit relocation without overflow. */
410 HOWTO (R_PPC_ADDR16_LO, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_dont,/* complain_on_overflow */
417 bfd_elf_generic_reloc, /* special_function */
418 "R_PPC_ADDR16_LO", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* The high order 16 bits of an address. */
425 HOWTO (R_PPC_ADDR16_HI, /* type */
426 16, /* rightshift */
427 1, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 FALSE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_dont, /* complain_on_overflow */
432 bfd_elf_generic_reloc, /* special_function */
433 "R_PPC_ADDR16_HI", /* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0xffff, /* dst_mask */
437 FALSE), /* pcrel_offset */
438
439 /* The high order 16 bits of an address, plus 1 if the contents of
440 the low 16 bits, treated as a signed number, is negative. */
441 HOWTO (R_PPC_ADDR16_HA, /* type */
442 16, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_dont, /* complain_on_overflow */
448 ppc_elf_addr16_ha_reloc, /* special_function */
449 "R_PPC_ADDR16_HA", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* An absolute 16 bit branch; the lower two bits must be zero.
456 FIXME: we don't check that, we just clear them. */
457 HOWTO (R_PPC_ADDR14, /* type */
458 0, /* rightshift */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_bitfield, /* complain_on_overflow */
464 bfd_elf_generic_reloc, /* special_function */
465 "R_PPC_ADDR14", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xfffc, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* An absolute 16 bit branch, for which bit 10 should be set to
472 indicate that the branch is expected to be taken. The lower two
473 bits must be zero. */
474 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 16, /* bitsize */
478 FALSE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_bitfield, /* complain_on_overflow */
481 bfd_elf_generic_reloc, /* special_function */
482 "R_PPC_ADDR14_BRTAKEN",/* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0xfffc, /* dst_mask */
486 FALSE), /* pcrel_offset */
487
488 /* An absolute 16 bit branch, for which bit 10 should be set to
489 indicate that the branch is not expected to be taken. The lower
490 two bits must be zero. */
491 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
492 0, /* rightshift */
493 2, /* size (0 = byte, 1 = short, 2 = long) */
494 16, /* bitsize */
495 FALSE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_bitfield, /* complain_on_overflow */
498 bfd_elf_generic_reloc, /* special_function */
499 "R_PPC_ADDR14_BRNTAKEN",/* name */
500 FALSE, /* partial_inplace */
501 0, /* src_mask */
502 0xfffc, /* dst_mask */
503 FALSE), /* pcrel_offset */
504
505 /* A relative 26 bit branch; the lower two bits must be zero. */
506 HOWTO (R_PPC_REL24, /* type */
507 0, /* rightshift */
508 2, /* size (0 = byte, 1 = short, 2 = long) */
509 26, /* bitsize */
510 TRUE, /* pc_relative */
511 0, /* bitpos */
512 complain_overflow_signed, /* complain_on_overflow */
513 bfd_elf_generic_reloc, /* special_function */
514 "R_PPC_REL24", /* name */
515 FALSE, /* partial_inplace */
516 0, /* src_mask */
517 0x3fffffc, /* dst_mask */
518 TRUE), /* pcrel_offset */
519
520 /* A relative 16 bit branch; the lower two bits must be zero. */
521 HOWTO (R_PPC_REL14, /* type */
522 0, /* rightshift */
523 2, /* size (0 = byte, 1 = short, 2 = long) */
524 16, /* bitsize */
525 TRUE, /* pc_relative */
526 0, /* bitpos */
527 complain_overflow_signed, /* complain_on_overflow */
528 bfd_elf_generic_reloc, /* special_function */
529 "R_PPC_REL14", /* name */
530 FALSE, /* partial_inplace */
531 0, /* src_mask */
532 0xfffc, /* dst_mask */
533 TRUE), /* pcrel_offset */
534
535 /* A relative 16 bit branch. Bit 10 should be set to indicate that
536 the branch is expected to be taken. The lower two bits must be
537 zero. */
538 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
539 0, /* rightshift */
540 2, /* size (0 = byte, 1 = short, 2 = long) */
541 16, /* bitsize */
542 TRUE, /* pc_relative */
543 0, /* bitpos */
544 complain_overflow_signed, /* complain_on_overflow */
545 bfd_elf_generic_reloc, /* special_function */
546 "R_PPC_REL14_BRTAKEN", /* name */
547 FALSE, /* partial_inplace */
548 0, /* src_mask */
549 0xfffc, /* dst_mask */
550 TRUE), /* pcrel_offset */
551
552 /* A relative 16 bit branch. Bit 10 should be set to indicate that
553 the branch is not expected to be taken. The lower two bits must
554 be zero. */
555 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
556 0, /* rightshift */
557 2, /* size (0 = byte, 1 = short, 2 = long) */
558 16, /* bitsize */
559 TRUE, /* pc_relative */
560 0, /* bitpos */
561 complain_overflow_signed, /* complain_on_overflow */
562 bfd_elf_generic_reloc, /* special_function */
563 "R_PPC_REL14_BRNTAKEN",/* name */
564 FALSE, /* partial_inplace */
565 0, /* src_mask */
566 0xfffc, /* dst_mask */
567 TRUE), /* pcrel_offset */
568
569 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
570 symbol. */
571 HOWTO (R_PPC_GOT16, /* type */
572 0, /* rightshift */
573 1, /* size (0 = byte, 1 = short, 2 = long) */
574 16, /* bitsize */
575 FALSE, /* pc_relative */
576 0, /* bitpos */
577 complain_overflow_signed, /* complain_on_overflow */
578 bfd_elf_generic_reloc, /* special_function */
579 "R_PPC_GOT16", /* name */
580 FALSE, /* partial_inplace */
581 0, /* src_mask */
582 0xffff, /* dst_mask */
583 FALSE), /* pcrel_offset */
584
585 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
586 the symbol. */
587 HOWTO (R_PPC_GOT16_LO, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_dont, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC_GOT16_LO", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
602 the symbol. */
603 HOWTO (R_PPC_GOT16_HI, /* type */
604 16, /* rightshift */
605 1, /* size (0 = byte, 1 = short, 2 = long) */
606 16, /* bitsize */
607 FALSE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_bitfield, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_GOT16_HI", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffff, /* dst_mask */
615 FALSE), /* pcrel_offset */
616
617 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
618 the symbol. */
619 HOWTO (R_PPC_GOT16_HA, /* type */
620 16, /* rightshift */
621 1, /* size (0 = byte, 1 = short, 2 = long) */
622 16, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_bitfield, /* complain_on_overflow */
626 ppc_elf_addr16_ha_reloc, /* special_function */
627 "R_PPC_GOT16_HA", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0xffff, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* Like R_PPC_REL24, but referring to the procedure linkage table
634 entry for the symbol. */
635 HOWTO (R_PPC_PLTREL24, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 26, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_signed, /* complain_on_overflow */
642 bfd_elf_generic_reloc, /* special_function */
643 "R_PPC_PLTREL24", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0x3fffffc, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* This is used only by the dynamic linker. The symbol should exist
650 both in the object being run and in some shared library. The
651 dynamic linker copies the data addressed by the symbol from the
652 shared library into the object, because the object being
653 run has to have the data at some particular address. */
654 HOWTO (R_PPC_COPY, /* type */
655 0, /* rightshift */
656 2, /* size (0 = byte, 1 = short, 2 = long) */
657 32, /* bitsize */
658 FALSE, /* pc_relative */
659 0, /* bitpos */
660 complain_overflow_bitfield, /* complain_on_overflow */
661 bfd_elf_generic_reloc, /* special_function */
662 "R_PPC_COPY", /* name */
663 FALSE, /* partial_inplace */
664 0, /* src_mask */
665 0, /* dst_mask */
666 FALSE), /* pcrel_offset */
667
668 /* Like R_PPC_ADDR32, but used when setting global offset table
669 entries. */
670 HOWTO (R_PPC_GLOB_DAT, /* type */
671 0, /* rightshift */
672 2, /* size (0 = byte, 1 = short, 2 = long) */
673 32, /* bitsize */
674 FALSE, /* pc_relative */
675 0, /* bitpos */
676 complain_overflow_bitfield, /* complain_on_overflow */
677 bfd_elf_generic_reloc, /* special_function */
678 "R_PPC_GLOB_DAT", /* name */
679 FALSE, /* partial_inplace */
680 0, /* src_mask */
681 0xffffffff, /* dst_mask */
682 FALSE), /* pcrel_offset */
683
684 /* Marks a procedure linkage table entry for a symbol. */
685 HOWTO (R_PPC_JMP_SLOT, /* type */
686 0, /* rightshift */
687 2, /* size (0 = byte, 1 = short, 2 = long) */
688 32, /* bitsize */
689 FALSE, /* pc_relative */
690 0, /* bitpos */
691 complain_overflow_bitfield, /* complain_on_overflow */
692 bfd_elf_generic_reloc, /* special_function */
693 "R_PPC_JMP_SLOT", /* name */
694 FALSE, /* partial_inplace */
695 0, /* src_mask */
696 0, /* dst_mask */
697 FALSE), /* pcrel_offset */
698
699 /* Used only by the dynamic linker. When the object is run, this
700 longword is set to the load address of the object, plus the
701 addend. */
702 HOWTO (R_PPC_RELATIVE, /* type */
703 0, /* rightshift */
704 2, /* size (0 = byte, 1 = short, 2 = long) */
705 32, /* bitsize */
706 FALSE, /* pc_relative */
707 0, /* bitpos */
708 complain_overflow_bitfield, /* complain_on_overflow */
709 bfd_elf_generic_reloc, /* special_function */
710 "R_PPC_RELATIVE", /* name */
711 FALSE, /* partial_inplace */
712 0, /* src_mask */
713 0xffffffff, /* dst_mask */
714 FALSE), /* pcrel_offset */
715
716 /* Like R_PPC_REL24, but uses the value of the symbol within the
717 object rather than the final value. Normally used for
718 _GLOBAL_OFFSET_TABLE_. */
719 HOWTO (R_PPC_LOCAL24PC, /* type */
720 0, /* rightshift */
721 2, /* size (0 = byte, 1 = short, 2 = long) */
722 26, /* bitsize */
723 TRUE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_signed, /* complain_on_overflow */
726 bfd_elf_generic_reloc, /* special_function */
727 "R_PPC_LOCAL24PC", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0x3fffffc, /* dst_mask */
731 TRUE), /* pcrel_offset */
732
733 /* Like R_PPC_ADDR32, but may be unaligned. */
734 HOWTO (R_PPC_UADDR32, /* type */
735 0, /* rightshift */
736 2, /* size (0 = byte, 1 = short, 2 = long) */
737 32, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_bitfield, /* complain_on_overflow */
741 bfd_elf_generic_reloc, /* special_function */
742 "R_PPC_UADDR32", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffffffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* Like R_PPC_ADDR16, but may be unaligned. */
749 HOWTO (R_PPC_UADDR16, /* type */
750 0, /* rightshift */
751 1, /* size (0 = byte, 1 = short, 2 = long) */
752 16, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_bitfield, /* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_PPC_UADDR16", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0xffff, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* 32-bit PC relative */
764 HOWTO (R_PPC_REL32, /* type */
765 0, /* rightshift */
766 2, /* size (0 = byte, 1 = short, 2 = long) */
767 32, /* bitsize */
768 TRUE, /* pc_relative */
769 0, /* bitpos */
770 complain_overflow_bitfield, /* complain_on_overflow */
771 bfd_elf_generic_reloc, /* special_function */
772 "R_PPC_REL32", /* name */
773 FALSE, /* partial_inplace */
774 0, /* src_mask */
775 0xffffffff, /* dst_mask */
776 TRUE), /* pcrel_offset */
777
778 /* 32-bit relocation to the symbol's procedure linkage table.
779 FIXME: not supported. */
780 HOWTO (R_PPC_PLT32, /* type */
781 0, /* rightshift */
782 2, /* size (0 = byte, 1 = short, 2 = long) */
783 32, /* bitsize */
784 FALSE, /* pc_relative */
785 0, /* bitpos */
786 complain_overflow_bitfield, /* complain_on_overflow */
787 bfd_elf_generic_reloc, /* special_function */
788 "R_PPC_PLT32", /* name */
789 FALSE, /* partial_inplace */
790 0, /* src_mask */
791 0, /* dst_mask */
792 FALSE), /* pcrel_offset */
793
794 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
795 FIXME: not supported. */
796 HOWTO (R_PPC_PLTREL32, /* type */
797 0, /* rightshift */
798 2, /* size (0 = byte, 1 = short, 2 = long) */
799 32, /* bitsize */
800 TRUE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_bitfield, /* complain_on_overflow */
803 bfd_elf_generic_reloc, /* special_function */
804 "R_PPC_PLTREL32", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0, /* dst_mask */
808 TRUE), /* pcrel_offset */
809
810 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
811 the symbol. */
812 HOWTO (R_PPC_PLT16_LO, /* type */
813 0, /* rightshift */
814 1, /* size (0 = byte, 1 = short, 2 = long) */
815 16, /* bitsize */
816 FALSE, /* pc_relative */
817 0, /* bitpos */
818 complain_overflow_dont, /* complain_on_overflow */
819 bfd_elf_generic_reloc, /* special_function */
820 "R_PPC_PLT16_LO", /* name */
821 FALSE, /* partial_inplace */
822 0, /* src_mask */
823 0xffff, /* dst_mask */
824 FALSE), /* pcrel_offset */
825
826 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
827 the symbol. */
828 HOWTO (R_PPC_PLT16_HI, /* type */
829 16, /* rightshift */
830 1, /* size (0 = byte, 1 = short, 2 = long) */
831 16, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_bitfield, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC_PLT16_HI", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 0xffff, /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
843 the symbol. */
844 HOWTO (R_PPC_PLT16_HA, /* type */
845 16, /* rightshift */
846 1, /* size (0 = byte, 1 = short, 2 = long) */
847 16, /* bitsize */
848 FALSE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_bitfield, /* complain_on_overflow */
851 ppc_elf_addr16_ha_reloc, /* special_function */
852 "R_PPC_PLT16_HA", /* name */
853 FALSE, /* partial_inplace */
854 0, /* src_mask */
855 0xffff, /* dst_mask */
856 FALSE), /* pcrel_offset */
857
858 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
859 small data items. */
860 HOWTO (R_PPC_SDAREL16, /* type */
861 0, /* rightshift */
862 1, /* size (0 = byte, 1 = short, 2 = long) */
863 16, /* bitsize */
864 FALSE, /* pc_relative */
865 0, /* bitpos */
866 complain_overflow_signed, /* complain_on_overflow */
867 bfd_elf_generic_reloc, /* special_function */
868 "R_PPC_SDAREL16", /* name */
869 FALSE, /* partial_inplace */
870 0, /* src_mask */
871 0xffff, /* dst_mask */
872 FALSE), /* pcrel_offset */
873
874 /* 16-bit section relative relocation. */
875 HOWTO (R_PPC_SECTOFF, /* type */
876 0, /* rightshift */
877 1, /* size (0 = byte, 1 = short, 2 = long) */
878 16, /* bitsize */
879 FALSE, /* pc_relative */
880 0, /* bitpos */
881 complain_overflow_bitfield, /* complain_on_overflow */
882 bfd_elf_generic_reloc, /* special_function */
883 "R_PPC_SECTOFF", /* name */
884 FALSE, /* partial_inplace */
885 0, /* src_mask */
886 0xffff, /* dst_mask */
887 FALSE), /* pcrel_offset */
888
889 /* 16-bit lower half section relative relocation. */
890 HOWTO (R_PPC_SECTOFF_LO, /* type */
891 0, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 bfd_elf_generic_reloc, /* special_function */
898 "R_PPC_SECTOFF_LO", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* 16-bit upper half section relative relocation. */
905 HOWTO (R_PPC_SECTOFF_HI, /* type */
906 16, /* rightshift */
907 1, /* size (0 = byte, 1 = short, 2 = long) */
908 16, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_bitfield, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC_SECTOFF_HI", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 0xffff, /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* 16-bit upper half adjusted section relative relocation. */
920 HOWTO (R_PPC_SECTOFF_HA, /* type */
921 16, /* rightshift */
922 1, /* size (0 = byte, 1 = short, 2 = long) */
923 16, /* bitsize */
924 FALSE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_bitfield, /* complain_on_overflow */
927 ppc_elf_addr16_ha_reloc, /* special_function */
928 "R_PPC_SECTOFF_HA", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 0xffff, /* dst_mask */
932 FALSE), /* pcrel_offset */
933
934 /* Marker reloc for TLS. */
935 HOWTO (R_PPC_TLS,
936 0, /* rightshift */
937 2, /* size (0 = byte, 1 = short, 2 = long) */
938 32, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 bfd_elf_generic_reloc, /* special_function */
943 "R_PPC_TLS", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* Computes the load module index of the load module that contains the
950 definition of its TLS sym. */
951 HOWTO (R_PPC_DTPMOD32,
952 0, /* rightshift */
953 2, /* size (0 = byte, 1 = short, 2 = long) */
954 32, /* bitsize */
955 FALSE, /* pc_relative */
956 0, /* bitpos */
957 complain_overflow_dont, /* complain_on_overflow */
958 ppc_elf_unhandled_reloc, /* special_function */
959 "R_PPC_DTPMOD32", /* name */
960 FALSE, /* partial_inplace */
961 0, /* src_mask */
962 0xffffffff, /* dst_mask */
963 FALSE), /* pcrel_offset */
964
965 /* Computes a dtv-relative displacement, the difference between the value
966 of sym+add and the base address of the thread-local storage block that
967 contains the definition of sym, minus 0x8000. */
968 HOWTO (R_PPC_DTPREL32,
969 0, /* rightshift */
970 2, /* size (0 = byte, 1 = short, 2 = long) */
971 32, /* bitsize */
972 FALSE, /* pc_relative */
973 0, /* bitpos */
974 complain_overflow_dont, /* complain_on_overflow */
975 ppc_elf_unhandled_reloc, /* special_function */
976 "R_PPC_DTPREL32", /* name */
977 FALSE, /* partial_inplace */
978 0, /* src_mask */
979 0xffffffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
981
982 /* A 16 bit dtprel reloc. */
983 HOWTO (R_PPC_DTPREL16,
984 0, /* rightshift */
985 1, /* size (0 = byte, 1 = short, 2 = long) */
986 16, /* bitsize */
987 FALSE, /* pc_relative */
988 0, /* bitpos */
989 complain_overflow_signed, /* complain_on_overflow */
990 ppc_elf_unhandled_reloc, /* special_function */
991 "R_PPC_DTPREL16", /* name */
992 FALSE, /* partial_inplace */
993 0, /* src_mask */
994 0xffff, /* dst_mask */
995 FALSE), /* pcrel_offset */
996
997 /* Like DTPREL16, but no overflow. */
998 HOWTO (R_PPC_DTPREL16_LO,
999 0, /* rightshift */
1000 1, /* size (0 = byte, 1 = short, 2 = long) */
1001 16, /* bitsize */
1002 FALSE, /* pc_relative */
1003 0, /* bitpos */
1004 complain_overflow_dont, /* complain_on_overflow */
1005 ppc_elf_unhandled_reloc, /* special_function */
1006 "R_PPC_DTPREL16_LO", /* name */
1007 FALSE, /* partial_inplace */
1008 0, /* src_mask */
1009 0xffff, /* dst_mask */
1010 FALSE), /* pcrel_offset */
1011
1012 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1013 HOWTO (R_PPC_DTPREL16_HI,
1014 16, /* rightshift */
1015 1, /* size (0 = byte, 1 = short, 2 = long) */
1016 16, /* bitsize */
1017 FALSE, /* pc_relative */
1018 0, /* bitpos */
1019 complain_overflow_dont, /* complain_on_overflow */
1020 ppc_elf_unhandled_reloc, /* special_function */
1021 "R_PPC_DTPREL16_HI", /* name */
1022 FALSE, /* partial_inplace */
1023 0, /* src_mask */
1024 0xffff, /* dst_mask */
1025 FALSE), /* pcrel_offset */
1026
1027 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1028 HOWTO (R_PPC_DTPREL16_HA,
1029 16, /* rightshift */
1030 1, /* size (0 = byte, 1 = short, 2 = long) */
1031 16, /* bitsize */
1032 FALSE, /* pc_relative */
1033 0, /* bitpos */
1034 complain_overflow_dont, /* complain_on_overflow */
1035 ppc_elf_unhandled_reloc, /* special_function */
1036 "R_PPC_DTPREL16_HA", /* name */
1037 FALSE, /* partial_inplace */
1038 0, /* src_mask */
1039 0xffff, /* dst_mask */
1040 FALSE), /* pcrel_offset */
1041
1042 /* Computes a tp-relative displacement, the difference between the value of
1043 sym+add and the value of the thread pointer (r13). */
1044 HOWTO (R_PPC_TPREL32,
1045 0, /* rightshift */
1046 2, /* size (0 = byte, 1 = short, 2 = long) */
1047 32, /* bitsize */
1048 FALSE, /* pc_relative */
1049 0, /* bitpos */
1050 complain_overflow_dont, /* complain_on_overflow */
1051 ppc_elf_unhandled_reloc, /* special_function */
1052 "R_PPC_TPREL32", /* name */
1053 FALSE, /* partial_inplace */
1054 0, /* src_mask */
1055 0xffffffff, /* dst_mask */
1056 FALSE), /* pcrel_offset */
1057
1058 /* A 16 bit tprel reloc. */
1059 HOWTO (R_PPC_TPREL16,
1060 0, /* rightshift */
1061 1, /* size (0 = byte, 1 = short, 2 = long) */
1062 16, /* bitsize */
1063 FALSE, /* pc_relative */
1064 0, /* bitpos */
1065 complain_overflow_signed, /* complain_on_overflow */
1066 ppc_elf_unhandled_reloc, /* special_function */
1067 "R_PPC_TPREL16", /* name */
1068 FALSE, /* partial_inplace */
1069 0, /* src_mask */
1070 0xffff, /* dst_mask */
1071 FALSE), /* pcrel_offset */
1072
1073 /* Like TPREL16, but no overflow. */
1074 HOWTO (R_PPC_TPREL16_LO,
1075 0, /* rightshift */
1076 1, /* size (0 = byte, 1 = short, 2 = long) */
1077 16, /* bitsize */
1078 FALSE, /* pc_relative */
1079 0, /* bitpos */
1080 complain_overflow_dont, /* complain_on_overflow */
1081 ppc_elf_unhandled_reloc, /* special_function */
1082 "R_PPC_TPREL16_LO", /* name */
1083 FALSE, /* partial_inplace */
1084 0, /* src_mask */
1085 0xffff, /* dst_mask */
1086 FALSE), /* pcrel_offset */
1087
1088 /* Like TPREL16_LO, but next higher group of 16 bits. */
1089 HOWTO (R_PPC_TPREL16_HI,
1090 16, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_dont, /* complain_on_overflow */
1096 ppc_elf_unhandled_reloc, /* special_function */
1097 "R_PPC_TPREL16_HI", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xffff, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like TPREL16_HI, but adjust for low 16 bits. */
1104 HOWTO (R_PPC_TPREL16_HA,
1105 16, /* rightshift */
1106 1, /* size (0 = byte, 1 = short, 2 = long) */
1107 16, /* bitsize */
1108 FALSE, /* pc_relative */
1109 0, /* bitpos */
1110 complain_overflow_dont, /* complain_on_overflow */
1111 ppc_elf_unhandled_reloc, /* special_function */
1112 "R_PPC_TPREL16_HA", /* name */
1113 FALSE, /* partial_inplace */
1114 0, /* src_mask */
1115 0xffff, /* dst_mask */
1116 FALSE), /* pcrel_offset */
1117
1118 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1119 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1120 to the first entry. */
1121 HOWTO (R_PPC_GOT_TLSGD16,
1122 0, /* rightshift */
1123 1, /* size (0 = byte, 1 = short, 2 = long) */
1124 16, /* bitsize */
1125 FALSE, /* pc_relative */
1126 0, /* bitpos */
1127 complain_overflow_signed, /* complain_on_overflow */
1128 ppc_elf_unhandled_reloc, /* special_function */
1129 "R_PPC_GOT_TLSGD16", /* name */
1130 FALSE, /* partial_inplace */
1131 0, /* src_mask */
1132 0xffff, /* dst_mask */
1133 FALSE), /* pcrel_offset */
1134
1135 /* Like GOT_TLSGD16, but no overflow. */
1136 HOWTO (R_PPC_GOT_TLSGD16_LO,
1137 0, /* rightshift */
1138 1, /* size (0 = byte, 1 = short, 2 = long) */
1139 16, /* bitsize */
1140 FALSE, /* pc_relative */
1141 0, /* bitpos */
1142 complain_overflow_dont, /* complain_on_overflow */
1143 ppc_elf_unhandled_reloc, /* special_function */
1144 "R_PPC_GOT_TLSGD16_LO", /* name */
1145 FALSE, /* partial_inplace */
1146 0, /* src_mask */
1147 0xffff, /* dst_mask */
1148 FALSE), /* pcrel_offset */
1149
1150 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1151 HOWTO (R_PPC_GOT_TLSGD16_HI,
1152 16, /* rightshift */
1153 1, /* size (0 = byte, 1 = short, 2 = long) */
1154 16, /* bitsize */
1155 FALSE, /* pc_relative */
1156 0, /* bitpos */
1157 complain_overflow_dont, /* complain_on_overflow */
1158 ppc_elf_unhandled_reloc, /* special_function */
1159 "R_PPC_GOT_TLSGD16_HI", /* name */
1160 FALSE, /* partial_inplace */
1161 0, /* src_mask */
1162 0xffff, /* dst_mask */
1163 FALSE), /* pcrel_offset */
1164
1165 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1166 HOWTO (R_PPC_GOT_TLSGD16_HA,
1167 16, /* rightshift */
1168 1, /* size (0 = byte, 1 = short, 2 = long) */
1169 16, /* bitsize */
1170 FALSE, /* pc_relative */
1171 0, /* bitpos */
1172 complain_overflow_dont, /* complain_on_overflow */
1173 ppc_elf_unhandled_reloc, /* special_function */
1174 "R_PPC_GOT_TLSGD16_HA", /* name */
1175 FALSE, /* partial_inplace */
1176 0, /* src_mask */
1177 0xffff, /* dst_mask */
1178 FALSE), /* pcrel_offset */
1179
1180 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1181 with values (sym+add)@dtpmod and zero, and computes the offset to the
1182 first entry. */
1183 HOWTO (R_PPC_GOT_TLSLD16,
1184 0, /* rightshift */
1185 1, /* size (0 = byte, 1 = short, 2 = long) */
1186 16, /* bitsize */
1187 FALSE, /* pc_relative */
1188 0, /* bitpos */
1189 complain_overflow_signed, /* complain_on_overflow */
1190 ppc_elf_unhandled_reloc, /* special_function */
1191 "R_PPC_GOT_TLSLD16", /* name */
1192 FALSE, /* partial_inplace */
1193 0, /* src_mask */
1194 0xffff, /* dst_mask */
1195 FALSE), /* pcrel_offset */
1196
1197 /* Like GOT_TLSLD16, but no overflow. */
1198 HOWTO (R_PPC_GOT_TLSLD16_LO,
1199 0, /* rightshift */
1200 1, /* size (0 = byte, 1 = short, 2 = long) */
1201 16, /* bitsize */
1202 FALSE, /* pc_relative */
1203 0, /* bitpos */
1204 complain_overflow_dont, /* complain_on_overflow */
1205 ppc_elf_unhandled_reloc, /* special_function */
1206 "R_PPC_GOT_TLSLD16_LO", /* name */
1207 FALSE, /* partial_inplace */
1208 0, /* src_mask */
1209 0xffff, /* dst_mask */
1210 FALSE), /* pcrel_offset */
1211
1212 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1213 HOWTO (R_PPC_GOT_TLSLD16_HI,
1214 16, /* rightshift */
1215 1, /* size (0 = byte, 1 = short, 2 = long) */
1216 16, /* bitsize */
1217 FALSE, /* pc_relative */
1218 0, /* bitpos */
1219 complain_overflow_dont, /* complain_on_overflow */
1220 ppc_elf_unhandled_reloc, /* special_function */
1221 "R_PPC_GOT_TLSLD16_HI", /* name */
1222 FALSE, /* partial_inplace */
1223 0, /* src_mask */
1224 0xffff, /* dst_mask */
1225 FALSE), /* pcrel_offset */
1226
1227 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1228 HOWTO (R_PPC_GOT_TLSLD16_HA,
1229 16, /* rightshift */
1230 1, /* size (0 = byte, 1 = short, 2 = long) */
1231 16, /* bitsize */
1232 FALSE, /* pc_relative */
1233 0, /* bitpos */
1234 complain_overflow_dont, /* complain_on_overflow */
1235 ppc_elf_unhandled_reloc, /* special_function */
1236 "R_PPC_GOT_TLSLD16_HA", /* name */
1237 FALSE, /* partial_inplace */
1238 0, /* src_mask */
1239 0xffff, /* dst_mask */
1240 FALSE), /* pcrel_offset */
1241
1242 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1243 the offset to the entry. */
1244 HOWTO (R_PPC_GOT_DTPREL16,
1245 0, /* rightshift */
1246 1, /* size (0 = byte, 1 = short, 2 = long) */
1247 16, /* bitsize */
1248 FALSE, /* pc_relative */
1249 0, /* bitpos */
1250 complain_overflow_signed, /* complain_on_overflow */
1251 ppc_elf_unhandled_reloc, /* special_function */
1252 "R_PPC_GOT_DTPREL16", /* name */
1253 FALSE, /* partial_inplace */
1254 0, /* src_mask */
1255 0xffff, /* dst_mask */
1256 FALSE), /* pcrel_offset */
1257
1258 /* Like GOT_DTPREL16, but no overflow. */
1259 HOWTO (R_PPC_GOT_DTPREL16_LO,
1260 0, /* rightshift */
1261 1, /* size (0 = byte, 1 = short, 2 = long) */
1262 16, /* bitsize */
1263 FALSE, /* pc_relative */
1264 0, /* bitpos */
1265 complain_overflow_dont, /* complain_on_overflow */
1266 ppc_elf_unhandled_reloc, /* special_function */
1267 "R_PPC_GOT_DTPREL16_LO", /* name */
1268 FALSE, /* partial_inplace */
1269 0, /* src_mask */
1270 0xffff, /* dst_mask */
1271 FALSE), /* pcrel_offset */
1272
1273 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1274 HOWTO (R_PPC_GOT_DTPREL16_HI,
1275 16, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_dont, /* complain_on_overflow */
1281 ppc_elf_unhandled_reloc, /* special_function */
1282 "R_PPC_GOT_DTPREL16_HI", /* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xffff, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1289 HOWTO (R_PPC_GOT_DTPREL16_HA,
1290 16, /* rightshift */
1291 1, /* size (0 = byte, 1 = short, 2 = long) */
1292 16, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 ppc_elf_unhandled_reloc, /* special_function */
1297 "R_PPC_GOT_DTPREL16_HA", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0xffff, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1304 offset to the entry. */
1305 HOWTO (R_PPC_GOT_TPREL16,
1306 0, /* rightshift */
1307 1, /* size (0 = byte, 1 = short, 2 = long) */
1308 16, /* bitsize */
1309 FALSE, /* pc_relative */
1310 0, /* bitpos */
1311 complain_overflow_signed, /* complain_on_overflow */
1312 ppc_elf_unhandled_reloc, /* special_function */
1313 "R_PPC_GOT_TPREL16", /* name */
1314 FALSE, /* partial_inplace */
1315 0, /* src_mask */
1316 0xffff, /* dst_mask */
1317 FALSE), /* pcrel_offset */
1318
1319 /* Like GOT_TPREL16, but no overflow. */
1320 HOWTO (R_PPC_GOT_TPREL16_LO,
1321 0, /* rightshift */
1322 1, /* size (0 = byte, 1 = short, 2 = long) */
1323 16, /* bitsize */
1324 FALSE, /* pc_relative */
1325 0, /* bitpos */
1326 complain_overflow_dont, /* complain_on_overflow */
1327 ppc_elf_unhandled_reloc, /* special_function */
1328 "R_PPC_GOT_TPREL16_LO", /* name */
1329 FALSE, /* partial_inplace */
1330 0, /* src_mask */
1331 0xffff, /* dst_mask */
1332 FALSE), /* pcrel_offset */
1333
1334 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1335 HOWTO (R_PPC_GOT_TPREL16_HI,
1336 16, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 FALSE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_dont, /* complain_on_overflow */
1342 ppc_elf_unhandled_reloc, /* special_function */
1343 "R_PPC_GOT_TPREL16_HI", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1350 HOWTO (R_PPC_GOT_TPREL16_HA,
1351 16, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 FALSE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_dont, /* complain_on_overflow */
1357 ppc_elf_unhandled_reloc, /* special_function */
1358 "R_PPC_GOT_TPREL16_HA", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 FALSE), /* pcrel_offset */
1363
1364 /* The remaining relocs are from the Embedded ELF ABI, and are not
1365 in the SVR4 ELF ABI. */
1366
1367 /* 32 bit value resulting from the addend minus the symbol. */
1368 HOWTO (R_PPC_EMB_NADDR32, /* type */
1369 0, /* rightshift */
1370 2, /* size (0 = byte, 1 = short, 2 = long) */
1371 32, /* bitsize */
1372 FALSE, /* pc_relative */
1373 0, /* bitpos */
1374 complain_overflow_bitfield, /* complain_on_overflow */
1375 bfd_elf_generic_reloc, /* special_function */
1376 "R_PPC_EMB_NADDR32", /* name */
1377 FALSE, /* partial_inplace */
1378 0, /* src_mask */
1379 0xffffffff, /* dst_mask */
1380 FALSE), /* pcrel_offset */
1381
1382 /* 16 bit value resulting from the addend minus the symbol. */
1383 HOWTO (R_PPC_EMB_NADDR16, /* type */
1384 0, /* rightshift */
1385 1, /* size (0 = byte, 1 = short, 2 = long) */
1386 16, /* bitsize */
1387 FALSE, /* pc_relative */
1388 0, /* bitpos */
1389 complain_overflow_bitfield, /* complain_on_overflow */
1390 bfd_elf_generic_reloc, /* special_function */
1391 "R_PPC_EMB_NADDR16", /* name */
1392 FALSE, /* partial_inplace */
1393 0, /* src_mask */
1394 0xffff, /* dst_mask */
1395 FALSE), /* pcrel_offset */
1396
1397 /* 16 bit value resulting from the addend minus the symbol. */
1398 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1399 0, /* rightshift */
1400 1, /* size (0 = byte, 1 = short, 2 = long) */
1401 16, /* bitsize */
1402 FALSE, /* pc_relative */
1403 0, /* bitpos */
1404 complain_overflow_dont,/* complain_on_overflow */
1405 bfd_elf_generic_reloc, /* special_function */
1406 "R_PPC_EMB_ADDR16_LO", /* name */
1407 FALSE, /* partial_inplace */
1408 0, /* src_mask */
1409 0xffff, /* dst_mask */
1410 FALSE), /* pcrel_offset */
1411
1412 /* The high order 16 bits of the addend minus the symbol. */
1413 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1414 16, /* rightshift */
1415 1, /* size (0 = byte, 1 = short, 2 = long) */
1416 16, /* bitsize */
1417 FALSE, /* pc_relative */
1418 0, /* bitpos */
1419 complain_overflow_dont, /* complain_on_overflow */
1420 bfd_elf_generic_reloc, /* special_function */
1421 "R_PPC_EMB_NADDR16_HI", /* name */
1422 FALSE, /* partial_inplace */
1423 0, /* src_mask */
1424 0xffff, /* dst_mask */
1425 FALSE), /* pcrel_offset */
1426
1427 /* The high order 16 bits of the result of the addend minus the address,
1428 plus 1 if the contents of the low 16 bits, treated as a signed number,
1429 is negative. */
1430 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1431 16, /* rightshift */
1432 1, /* size (0 = byte, 1 = short, 2 = long) */
1433 16, /* bitsize */
1434 FALSE, /* pc_relative */
1435 0, /* bitpos */
1436 complain_overflow_dont, /* complain_on_overflow */
1437 ppc_elf_addr16_ha_reloc, /* special_function */
1438 "R_PPC_EMB_NADDR16_HA", /* name */
1439 FALSE, /* partial_inplace */
1440 0, /* src_mask */
1441 0xffff, /* dst_mask */
1442 FALSE), /* pcrel_offset */
1443
1444 /* 16 bit value resulting from allocating a 4 byte word to hold an
1445 address in the .sdata section, and returning the offset from
1446 _SDA_BASE_ for that relocation. */
1447 HOWTO (R_PPC_EMB_SDAI16, /* type */
1448 0, /* rightshift */
1449 1, /* size (0 = byte, 1 = short, 2 = long) */
1450 16, /* bitsize */
1451 FALSE, /* pc_relative */
1452 0, /* bitpos */
1453 complain_overflow_bitfield, /* complain_on_overflow */
1454 bfd_elf_generic_reloc, /* special_function */
1455 "R_PPC_EMB_SDAI16", /* name */
1456 FALSE, /* partial_inplace */
1457 0, /* src_mask */
1458 0xffff, /* dst_mask */
1459 FALSE), /* pcrel_offset */
1460
1461 /* 16 bit value resulting from allocating a 4 byte word to hold an
1462 address in the .sdata2 section, and returning the offset from
1463 _SDA2_BASE_ for that relocation. */
1464 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1465 0, /* rightshift */
1466 1, /* size (0 = byte, 1 = short, 2 = long) */
1467 16, /* bitsize */
1468 FALSE, /* pc_relative */
1469 0, /* bitpos */
1470 complain_overflow_bitfield, /* complain_on_overflow */
1471 bfd_elf_generic_reloc, /* special_function */
1472 "R_PPC_EMB_SDA2I16", /* name */
1473 FALSE, /* partial_inplace */
1474 0, /* src_mask */
1475 0xffff, /* dst_mask */
1476 FALSE), /* pcrel_offset */
1477
1478 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1479 small data items. */
1480 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1481 0, /* rightshift */
1482 1, /* size (0 = byte, 1 = short, 2 = long) */
1483 16, /* bitsize */
1484 FALSE, /* pc_relative */
1485 0, /* bitpos */
1486 complain_overflow_signed, /* complain_on_overflow */
1487 bfd_elf_generic_reloc, /* special_function */
1488 "R_PPC_EMB_SDA2REL", /* name */
1489 FALSE, /* partial_inplace */
1490 0, /* src_mask */
1491 0xffff, /* dst_mask */
1492 FALSE), /* pcrel_offset */
1493
1494 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1495 signed offset from the appropriate base, and filling in the register
1496 field with the appropriate register (0, 2, or 13). */
1497 HOWTO (R_PPC_EMB_SDA21, /* type */
1498 0, /* rightshift */
1499 2, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_signed, /* complain_on_overflow */
1504 bfd_elf_generic_reloc, /* special_function */
1505 "R_PPC_EMB_SDA21", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Relocation not handled: R_PPC_EMB_MRKREF */
1512 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1513 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1514 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1515 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1516 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1517
1518 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1519 in the 16 bit signed offset from the appropriate base, and filling in the
1520 register field with the appropriate register (0, 2, or 13). */
1521 HOWTO (R_PPC_EMB_RELSDA, /* type */
1522 0, /* rightshift */
1523 1, /* size (0 = byte, 1 = short, 2 = long) */
1524 16, /* bitsize */
1525 TRUE, /* pc_relative */
1526 0, /* bitpos */
1527 complain_overflow_signed, /* complain_on_overflow */
1528 bfd_elf_generic_reloc, /* special_function */
1529 "R_PPC_EMB_RELSDA", /* name */
1530 FALSE, /* partial_inplace */
1531 0, /* src_mask */
1532 0xffff, /* dst_mask */
1533 FALSE), /* pcrel_offset */
1534
1535 /* Phony relocs to handle branch stubs. */
1536 HOWTO (R_PPC_RELAX32, /* type */
1537 0, /* rightshift */
1538 0, /* size */
1539 0, /* bitsize */
1540 FALSE, /* pc_relative */
1541 0, /* bitpos */
1542 complain_overflow_dont, /* complain_on_overflow */
1543 bfd_elf_generic_reloc, /* special_function */
1544 "R_PPC_RELAX32", /* name */
1545 FALSE, /* partial_inplace */
1546 0, /* src_mask */
1547 0, /* dst_mask */
1548 FALSE), /* pcrel_offset */
1549
1550 HOWTO (R_PPC_RELAX32PC, /* type */
1551 0, /* rightshift */
1552 0, /* size */
1553 0, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_dont, /* complain_on_overflow */
1557 bfd_elf_generic_reloc, /* special_function */
1558 "R_PPC_RELAX32PC", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* GNU extension to record C++ vtable hierarchy. */
1565 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1566 0, /* rightshift */
1567 0, /* size (0 = byte, 1 = short, 2 = long) */
1568 0, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 NULL, /* special_function */
1573 "R_PPC_GNU_VTINHERIT", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* GNU extension to record C++ vtable member usage. */
1580 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1581 0, /* rightshift */
1582 0, /* size (0 = byte, 1 = short, 2 = long) */
1583 0, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_dont, /* complain_on_overflow */
1587 NULL, /* special_function */
1588 "R_PPC_GNU_VTENTRY", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Phony reloc to handle AIX style TOC entries. */
1595 HOWTO (R_PPC_TOC16, /* type */
1596 0, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_signed, /* complain_on_overflow */
1602 bfd_elf_generic_reloc, /* special_function */
1603 "R_PPC_TOC16", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608 };
1609 \f
1610 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1611
1612 static void
1613 ppc_elf_howto_init (void)
1614 {
1615 unsigned int i, type;
1616
1617 for (i = 0;
1618 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1619 i++)
1620 {
1621 type = ppc_elf_howto_raw[i].type;
1622 if (type >= (sizeof (ppc_elf_howto_table)
1623 / sizeof (ppc_elf_howto_table[0])))
1624 abort ();
1625 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1626 }
1627 }
1628 \f
1629 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
1630
1631 static const int shared_stub_entry[] =
1632 {
1633 0x7c0802a6, /* mflr 0 */
1634 0x429f0005, /* bcl 20, 31, .Lxxx */
1635 0x7d6802a6, /* mflr 11 */
1636 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
1637 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
1638 0x7c0803a6, /* mtlr 0 */
1639 0x7d6903a6, /* mtctr 11 */
1640 0x4e800420, /* bctr */
1641 };
1642
1643 static const int stub_entry[] =
1644 {
1645 0x3d600000, /* lis 11,xxx@ha */
1646 0x396b0000, /* addi 11,11,xxx@l */
1647 0x7d6903a6, /* mtctr 11 */
1648 0x4e800420, /* bctr */
1649 };
1650
1651
1652 static bfd_boolean
1653 ppc_elf_relax_section (bfd *abfd,
1654 asection *isec,
1655 struct bfd_link_info *link_info,
1656 bfd_boolean *again)
1657 {
1658 struct one_fixup
1659 {
1660 struct one_fixup *next;
1661 asection *tsec;
1662 bfd_vma toff;
1663 bfd_vma trampoff;
1664 };
1665
1666 Elf_Internal_Shdr *symtab_hdr;
1667 bfd_byte *contents = NULL;
1668 Elf_Internal_Sym *isymbuf = NULL;
1669 Elf_Internal_Rela *internal_relocs = NULL;
1670 Elf_Internal_Rela *irel, *irelend;
1671 struct one_fixup *fixups = NULL;
1672 bfd_boolean changed;
1673 struct ppc_elf_link_hash_table *ppc_info;
1674 bfd_size_type trampoff;
1675
1676 *again = FALSE;
1677
1678 /* Nothing to do if there are no relocations. */
1679 if ((isec->flags & SEC_RELOC) == 0 || isec->reloc_count == 0)
1680 return TRUE;
1681
1682 /* If needed, initialize this section's cooked size. */
1683 if (isec->_cooked_size == 0)
1684 isec->_cooked_size = isec->_raw_size;
1685
1686 trampoff = (isec->_cooked_size + 3) & (bfd_vma) -4;
1687 /* Space for a branch around any trampolines. */
1688 trampoff += 4;
1689
1690 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1691
1692 /* Get a copy of the native relocations. */
1693 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
1694 link_info->keep_memory);
1695 if (internal_relocs == NULL)
1696 goto error_return;
1697
1698 ppc_info = ppc_elf_hash_table (link_info);
1699 irelend = internal_relocs + isec->reloc_count;
1700
1701 /* Get the section contents. */
1702 /* Get cached copy if it exists. */
1703 if (elf_section_data (isec)->this_hdr.contents != NULL)
1704 contents = elf_section_data (isec)->this_hdr.contents;
1705 else
1706 {
1707 /* Go get them off disk. */
1708 contents = bfd_malloc (isec->_raw_size);
1709 if (contents == NULL)
1710 goto error_return;
1711
1712 if (!bfd_get_section_contents (abfd, isec, contents, 0, isec->_raw_size))
1713 goto error_return;
1714 }
1715
1716 for (irel = internal_relocs; irel < irelend; irel++)
1717 {
1718 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
1719 bfd_vma symaddr, reladdr, toff, roff;
1720 asection *tsec;
1721 struct one_fixup *f;
1722 size_t insn_offset = 0;
1723 bfd_vma max_branch_offset, val;
1724 bfd_byte *hit_addr;
1725 unsigned long t0;
1726
1727 switch (r_type)
1728 {
1729 case R_PPC_REL24:
1730 case R_PPC_LOCAL24PC:
1731 case R_PPC_PLTREL24:
1732 max_branch_offset = 1 << 25;
1733 break;
1734
1735 case R_PPC_REL14:
1736 case R_PPC_REL14_BRTAKEN:
1737 case R_PPC_REL14_BRNTAKEN:
1738 max_branch_offset = 1 << 15;
1739 break;
1740
1741 default:
1742 continue;
1743 }
1744
1745 /* Get the value of the symbol referred to by the reloc. */
1746 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1747 {
1748 /* A local symbol. */
1749 Elf_Internal_Sym *isym;
1750
1751 /* Read this BFD's local symbols. */
1752 if (isymbuf == NULL)
1753 {
1754 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1755 if (isymbuf == NULL)
1756 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1757 symtab_hdr->sh_info, 0,
1758 NULL, NULL, NULL);
1759 if (isymbuf == 0)
1760 goto error_return;
1761 }
1762 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1763 if (isym->st_shndx == SHN_UNDEF)
1764 continue; /* We can't do anything with undefined symbols. */
1765 else if (isym->st_shndx == SHN_ABS)
1766 tsec = bfd_abs_section_ptr;
1767 else if (isym->st_shndx == SHN_COMMON)
1768 tsec = bfd_com_section_ptr;
1769 else
1770 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1771
1772 toff = isym->st_value;
1773 }
1774 else
1775 {
1776 /* Global symbol handling. */
1777 unsigned long indx;
1778 struct elf_link_hash_entry *h;
1779
1780 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1781 h = elf_sym_hashes (abfd)[indx];
1782
1783 while (h->root.type == bfd_link_hash_indirect
1784 || h->root.type == bfd_link_hash_warning)
1785 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1786
1787 if (r_type == R_PPC_PLTREL24
1788 && ppc_info->plt != NULL
1789 && h->plt.offset != (bfd_vma) -1)
1790 {
1791 tsec = ppc_info->plt;
1792 toff = h->plt.offset;
1793 }
1794 else if (h->root.type == bfd_link_hash_defined
1795 || h->root.type == bfd_link_hash_defweak)
1796 {
1797 tsec = h->root.u.def.section;
1798 toff = h->root.u.def.value;
1799 }
1800 else
1801 continue;
1802 }
1803
1804 /* If the branch and target are in the same section, you have
1805 no hope of adding stubs. We'll error out later should the
1806 branch overflow. */
1807 if (tsec == isec)
1808 continue;
1809
1810 toff += irel->r_addend;
1811 if (tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
1812 toff = _bfd_merged_section_offset (abfd, &tsec,
1813 elf_section_data (tsec)->sec_info,
1814 toff, 0);
1815
1816 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
1817
1818 roff = irel->r_offset;
1819
1820 reladdr = (isec->output_section->vma
1821 + isec->output_offset
1822 + roff);
1823
1824 /* If the branch is in range, no need to do anything. */
1825 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
1826 continue;
1827
1828 /* Look for an existing fixup to this address. */
1829 for (f = fixups; f ; f = f->next)
1830 if (f->tsec == tsec && f->toff == toff)
1831 break;
1832
1833 if (f == NULL)
1834 {
1835 size_t size;
1836 unsigned long stub_rtype;
1837
1838 val = trampoff - roff;
1839 if (val >= max_branch_offset)
1840 /* Oh dear, we can't reach a trampoline. Don't try to add
1841 one. We'll report an error later. */
1842 continue;
1843
1844 if (link_info->shared)
1845 {
1846 size = 4 * ARRAY_SIZE (shared_stub_entry);
1847 insn_offset = 12;
1848 stub_rtype = R_PPC_RELAX32PC;
1849 }
1850 else
1851 {
1852 size = 4 * ARRAY_SIZE (stub_entry);
1853 insn_offset = 0;
1854 stub_rtype = R_PPC_RELAX32;
1855 }
1856
1857 /* Hijack the old relocation. Since we need two
1858 relocations for this use a "composite" reloc. */
1859 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1860 stub_rtype);
1861 irel->r_offset = trampoff + insn_offset;
1862
1863 /* Record the fixup so we don't do it again this section. */
1864 f = bfd_malloc (sizeof (*f));
1865 f->next = fixups;
1866 f->tsec = tsec;
1867 f->toff = toff;
1868 f->trampoff = trampoff;
1869 fixups = f;
1870
1871 trampoff += size;
1872 }
1873 else
1874 {
1875 val = f->trampoff - roff;
1876 if (val >= max_branch_offset)
1877 continue;
1878
1879 /* Nop out the reloc, since we're finalizing things here. */
1880 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
1881 }
1882
1883 /* Fix up the existing branch to hit the trampoline. */
1884 hit_addr = contents + roff;
1885 switch (r_type)
1886 {
1887 case R_PPC_REL24:
1888 case R_PPC_LOCAL24PC:
1889 case R_PPC_PLTREL24:
1890 t0 = bfd_get_32 (abfd, hit_addr);
1891 t0 &= ~0x3fffffc;
1892 t0 |= val & 0x3fffffc;
1893 bfd_put_32 (abfd, t0, hit_addr);
1894 break;
1895
1896 case R_PPC_REL14:
1897 case R_PPC_REL14_BRTAKEN:
1898 case R_PPC_REL14_BRNTAKEN:
1899 t0 = bfd_get_32 (abfd, hit_addr);
1900 t0 &= ~0xfffc;
1901 t0 |= val & 0xfffc;
1902 bfd_put_32 (abfd, t0, hit_addr);
1903 break;
1904 }
1905 }
1906
1907 /* Write out the trampolines. */
1908 changed = fixups != NULL;
1909 if (fixups != NULL)
1910 {
1911 const int *stub;
1912 bfd_byte *dest;
1913 bfd_vma val;
1914 int i, size;
1915
1916 do
1917 {
1918 struct one_fixup *f = fixups;
1919 fixups = fixups->next;
1920 free (f);
1921 }
1922 while (fixups);
1923
1924 contents = bfd_realloc (contents, trampoff);
1925 if (contents == NULL)
1926 goto error_return;
1927
1928 isec->_cooked_size = (isec->_cooked_size + 3) & (bfd_vma) -4;
1929 /* Branch around the trampolines. */
1930 val = trampoff - isec->_cooked_size + 0x48000000;
1931 dest = contents + isec->_cooked_size;
1932 isec->_cooked_size = trampoff;
1933 bfd_put_32 (abfd, val, dest);
1934 dest += 4;
1935
1936 if (link_info->shared)
1937 {
1938 stub = shared_stub_entry;
1939 size = ARRAY_SIZE (shared_stub_entry);
1940 }
1941 else
1942 {
1943 stub = stub_entry;
1944 size = ARRAY_SIZE (stub_entry);
1945 }
1946
1947 i = 0;
1948 while (dest < contents + trampoff)
1949 {
1950 bfd_put_32 (abfd, stub[i], dest);
1951 i++;
1952 if (i == size)
1953 i = 0;
1954 dest += 4;
1955 }
1956 BFD_ASSERT (i == 0);
1957 }
1958
1959 if (isymbuf != NULL
1960 && symtab_hdr->contents != (unsigned char *) isymbuf)
1961 {
1962 if (! link_info->keep_memory)
1963 free (isymbuf);
1964 else
1965 {
1966 /* Cache the symbols for elf_link_input_bfd. */
1967 symtab_hdr->contents = (unsigned char *) isymbuf;
1968 }
1969 }
1970
1971 if (contents != NULL
1972 && elf_section_data (isec)->this_hdr.contents != contents)
1973 {
1974 if (!changed && !link_info->keep_memory)
1975 free (contents);
1976 else
1977 {
1978 /* Cache the section contents for elf_link_input_bfd. */
1979 elf_section_data (isec)->this_hdr.contents = contents;
1980 }
1981 }
1982
1983 if (elf_section_data (isec)->relocs != internal_relocs)
1984 {
1985 if (!changed)
1986 free (internal_relocs);
1987 else
1988 elf_section_data (isec)->relocs = internal_relocs;
1989 }
1990
1991 *again = changed;
1992 return TRUE;
1993
1994 error_return:
1995 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
1996 free (isymbuf);
1997 if (contents != NULL
1998 && elf_section_data (isec)->this_hdr.contents != contents)
1999 free (contents);
2000 if (internal_relocs != NULL
2001 && elf_section_data (isec)->relocs != internal_relocs)
2002 free (internal_relocs);
2003 return FALSE;
2004 }
2005 \f
2006 static reloc_howto_type *
2007 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2008 bfd_reloc_code_real_type code)
2009 {
2010 enum elf_ppc_reloc_type r;
2011
2012 /* Initialize howto table if not already done. */
2013 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2014 ppc_elf_howto_init ();
2015
2016 switch (code)
2017 {
2018 default:
2019 return NULL;
2020
2021 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
2022 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
2023 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
2024 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
2025 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
2026 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
2027 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
2028 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
2029 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
2030 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
2031 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
2032 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
2033 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
2034 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
2035 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
2036 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
2037 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
2038 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
2039 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
2040 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
2041 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
2042 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
2043 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
2044 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
2045 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
2046 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
2047 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
2048 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
2049 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
2050 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
2051 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
2052 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
2053 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
2054 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
2055 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
2056 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
2057 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
2058 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
2059 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
2060 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
2061 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
2062 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
2063 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
2064 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
2065 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
2066 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
2067 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
2068 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
2069 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
2070 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
2071 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
2072 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
2073 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
2074 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
2075 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
2076 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
2077 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
2078 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
2079 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
2080 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
2081 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
2082 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
2083 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
2084 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
2085 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
2086 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
2087 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
2088 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
2089 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
2090 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
2091 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
2092 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
2093 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
2094 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
2095 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
2096 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
2097 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
2098 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
2099 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
2100 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2101 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2102 }
2103
2104 return ppc_elf_howto_table[r];
2105 };
2106
2107 /* Set the howto pointer for a PowerPC ELF reloc. */
2108
2109 static void
2110 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2111 arelent *cache_ptr,
2112 Elf_Internal_Rela *dst)
2113 {
2114 /* Initialize howto table if not already done. */
2115 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2116 ppc_elf_howto_init ();
2117
2118 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2119 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2120 }
2121
2122 /* Handle the R_PPC_ADDR16_HA reloc. */
2123
2124 static bfd_reloc_status_type
2125 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2126 arelent *reloc_entry,
2127 asymbol *symbol,
2128 void *data ATTRIBUTE_UNUSED,
2129 asection *input_section,
2130 bfd *output_bfd,
2131 char **error_message ATTRIBUTE_UNUSED)
2132 {
2133 bfd_vma relocation;
2134
2135 if (output_bfd != NULL)
2136 {
2137 reloc_entry->address += input_section->output_offset;
2138 return bfd_reloc_ok;
2139 }
2140
2141 if (reloc_entry->address > input_section->_cooked_size)
2142 return bfd_reloc_outofrange;
2143
2144 if (bfd_is_com_section (symbol->section))
2145 relocation = 0;
2146 else
2147 relocation = symbol->value;
2148
2149 relocation += symbol->section->output_section->vma;
2150 relocation += symbol->section->output_offset;
2151 relocation += reloc_entry->addend;
2152
2153 reloc_entry->addend += (relocation & 0x8000) << 1;
2154
2155 return bfd_reloc_continue;
2156 }
2157
2158 static bfd_reloc_status_type
2159 ppc_elf_unhandled_reloc (bfd *abfd,
2160 arelent *reloc_entry,
2161 asymbol *symbol,
2162 void *data,
2163 asection *input_section,
2164 bfd *output_bfd,
2165 char **error_message)
2166 {
2167 /* If this is a relocatable link (output_bfd test tells us), just
2168 call the generic function. Any adjustment will be done at final
2169 link time. */
2170 if (output_bfd != NULL)
2171 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2172 input_section, output_bfd, error_message);
2173
2174 if (error_message != NULL)
2175 {
2176 static char buf[60];
2177 sprintf (buf, _("generic linker can't handle %s"),
2178 reloc_entry->howto->name);
2179 *error_message = buf;
2180 }
2181 return bfd_reloc_dangerous;
2182 }
2183
2184 /* Fix bad default arch selected for a 32 bit input bfd when the
2185 default is 64 bit. */
2186
2187 static bfd_boolean
2188 ppc_elf_object_p (bfd *abfd)
2189 {
2190 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2191 {
2192 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2193
2194 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2195 {
2196 /* Relies on arch after 64 bit default being 32 bit default. */
2197 abfd->arch_info = abfd->arch_info->next;
2198 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2199 }
2200 }
2201 return TRUE;
2202 }
2203
2204 /* Function to set whether a module needs the -mrelocatable bit set. */
2205
2206 static bfd_boolean
2207 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2208 {
2209 BFD_ASSERT (!elf_flags_init (abfd)
2210 || elf_elfheader (abfd)->e_flags == flags);
2211
2212 elf_elfheader (abfd)->e_flags = flags;
2213 elf_flags_init (abfd) = TRUE;
2214 return TRUE;
2215 }
2216
2217 /* Merge backend specific data from an object file to the output
2218 object file when linking. */
2219
2220 static bfd_boolean
2221 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2222 {
2223 flagword old_flags;
2224 flagword new_flags;
2225 bfd_boolean error;
2226
2227 /* Check if we have the same endianess. */
2228 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
2229 return FALSE;
2230
2231 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2232 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2233 return TRUE;
2234
2235 new_flags = elf_elfheader (ibfd)->e_flags;
2236 old_flags = elf_elfheader (obfd)->e_flags;
2237 if (!elf_flags_init (obfd))
2238 {
2239 /* First call, no flags set. */
2240 elf_flags_init (obfd) = TRUE;
2241 elf_elfheader (obfd)->e_flags = new_flags;
2242 }
2243
2244 /* Compatible flags are ok. */
2245 else if (new_flags == old_flags)
2246 ;
2247
2248 /* Incompatible flags. */
2249 else
2250 {
2251 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
2252 to be linked with either. */
2253 error = FALSE;
2254 if ((new_flags & EF_PPC_RELOCATABLE) != 0
2255 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
2256 {
2257 error = TRUE;
2258 (*_bfd_error_handler)
2259 (_("%s: compiled with -mrelocatable and linked with "
2260 "modules compiled normally"),
2261 bfd_archive_filename (ibfd));
2262 }
2263 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
2264 && (old_flags & EF_PPC_RELOCATABLE) != 0)
2265 {
2266 error = TRUE;
2267 (*_bfd_error_handler)
2268 (_("%s: compiled normally and linked with "
2269 "modules compiled with -mrelocatable"),
2270 bfd_archive_filename (ibfd));
2271 }
2272
2273 /* The output is -mrelocatable-lib iff both the input files are. */
2274 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
2275 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
2276
2277 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
2278 but each input file is either -mrelocatable or -mrelocatable-lib. */
2279 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
2280 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
2281 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
2282 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
2283
2284 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
2285 any module uses it. */
2286 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
2287
2288 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2289 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
2290
2291 /* Warn about any other mismatches. */
2292 if (new_flags != old_flags)
2293 {
2294 error = TRUE;
2295 (*_bfd_error_handler)
2296 (_("%s: uses different e_flags (0x%lx) fields "
2297 "than previous modules (0x%lx)"),
2298 bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
2299 }
2300
2301 if (error)
2302 {
2303 bfd_set_error (bfd_error_bad_value);
2304 return FALSE;
2305 }
2306 }
2307
2308 return TRUE;
2309 }
2310 \f
2311 /* Handle a PowerPC specific section when reading an object file. This
2312 is called when elfcode.h finds a section with an unknown type. */
2313
2314 static bfd_boolean
2315 ppc_elf_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, const char *name)
2316 {
2317 asection *newsect;
2318 flagword flags;
2319
2320 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2321 return FALSE;
2322
2323 newsect = hdr->bfd_section;
2324 flags = bfd_get_section_flags (abfd, newsect);
2325 if (hdr->sh_flags & SHF_EXCLUDE)
2326 flags |= SEC_EXCLUDE;
2327
2328 if (hdr->sh_type == SHT_ORDERED)
2329 flags |= SEC_SORT_ENTRIES;
2330
2331 bfd_set_section_flags (abfd, newsect, flags);
2332 return TRUE;
2333 }
2334 \f
2335 /* Set up any other section flags and such that may be necessary. */
2336
2337 static bfd_boolean
2338 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2339 Elf_Internal_Shdr *shdr,
2340 asection *asect)
2341 {
2342 if ((asect->flags & SEC_EXCLUDE) != 0)
2343 shdr->sh_flags |= SHF_EXCLUDE;
2344
2345 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2346 shdr->sh_type = SHT_ORDERED;
2347
2348 return TRUE;
2349 }
2350 \f
2351 /* Find a linker generated pointer with a given addend and type. */
2352
2353 static elf_linker_section_pointers_t *
2354 elf_find_pointer_linker_section
2355 (elf_linker_section_pointers_t *linker_pointers,
2356 bfd_vma addend,
2357 elf_linker_section_t *lsect)
2358 {
2359 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2360 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2361 return linker_pointers;
2362
2363 return NULL;
2364 }
2365 \f
2366 /* Allocate a pointer to live in a linker created section. */
2367
2368 static bfd_boolean
2369 elf_create_pointer_linker_section (bfd *abfd,
2370 struct bfd_link_info *info,
2371 elf_linker_section_t *lsect,
2372 struct elf_link_hash_entry *h,
2373 const Elf_Internal_Rela *rel)
2374 {
2375 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2376 elf_linker_section_pointers_t *linker_section_ptr;
2377 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2378 bfd_size_type amt;
2379
2380 BFD_ASSERT (lsect != NULL);
2381
2382 /* Is this a global symbol? */
2383 if (h != NULL)
2384 {
2385 struct ppc_elf_link_hash_entry *eh;
2386
2387 /* Has this symbol already been allocated? If so, our work is done. */
2388 eh = (struct ppc_elf_link_hash_entry *) h;
2389 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2390 rel->r_addend,
2391 lsect))
2392 return TRUE;
2393
2394 ptr_linker_section_ptr = &eh->linker_section_pointer;
2395 /* Make sure this symbol is output as a dynamic symbol. */
2396 if (h->dynindx == -1)
2397 {
2398 if (! _bfd_elf_link_record_dynamic_symbol (info, h))
2399 return FALSE;
2400 }
2401
2402 if (lsect->rel_section)
2403 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
2404 }
2405 else
2406 {
2407 /* Allocation of a pointer to a local symbol. */
2408 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2409
2410 /* Allocate a table to hold the local symbols if first time. */
2411 if (!ptr)
2412 {
2413 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2414
2415 amt = num_symbols;
2416 amt *= sizeof (elf_linker_section_pointers_t *);
2417 ptr = bfd_zalloc (abfd, amt);
2418
2419 if (!ptr)
2420 return FALSE;
2421
2422 elf_local_ptr_offsets (abfd) = ptr;
2423 }
2424
2425 /* Has this symbol already been allocated? If so, our work is done. */
2426 if (elf_find_pointer_linker_section (ptr[r_symndx],
2427 rel->r_addend,
2428 lsect))
2429 return TRUE;
2430
2431 ptr_linker_section_ptr = &ptr[r_symndx];
2432
2433 if (info->shared)
2434 {
2435 /* If we are generating a shared object, we need to
2436 output a R_<xxx>_RELATIVE reloc so that the
2437 dynamic linker can adjust this GOT entry. */
2438 BFD_ASSERT (lsect->rel_section != NULL);
2439 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
2440 }
2441 }
2442
2443 /* Allocate space for a pointer in the linker section, and allocate
2444 a new pointer record from internal memory. */
2445 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2446 amt = sizeof (elf_linker_section_pointers_t);
2447 linker_section_ptr = bfd_alloc (abfd, amt);
2448
2449 if (!linker_section_ptr)
2450 return FALSE;
2451
2452 linker_section_ptr->next = *ptr_linker_section_ptr;
2453 linker_section_ptr->addend = rel->r_addend;
2454 linker_section_ptr->lsect = lsect;
2455 linker_section_ptr->written_address_p = FALSE;
2456 *ptr_linker_section_ptr = linker_section_ptr;
2457
2458 linker_section_ptr->offset = lsect->section->_raw_size;
2459 lsect->section->_raw_size += 4;
2460
2461 #ifdef DEBUG
2462 fprintf (stderr,
2463 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2464 lsect->name, (long) linker_section_ptr->offset,
2465 (long) lsect->section->_raw_size);
2466 #endif
2467
2468 return TRUE;
2469 }
2470 \f
2471 #define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR)
2472
2473 /* Fill in the address for a pointer generated in a linker section. */
2474
2475 static bfd_vma
2476 elf_finish_pointer_linker_section (bfd *output_bfd,
2477 bfd *input_bfd,
2478 struct bfd_link_info *info,
2479 elf_linker_section_t *lsect,
2480 struct elf_link_hash_entry *h,
2481 bfd_vma relocation,
2482 const Elf_Internal_Rela *rel,
2483 int relative_reloc)
2484 {
2485 elf_linker_section_pointers_t *linker_section_ptr;
2486
2487 BFD_ASSERT (lsect != NULL);
2488
2489 if (h != NULL)
2490 {
2491 /* Handle global symbol. */
2492 struct ppc_elf_link_hash_entry *eh;
2493
2494 eh = (struct ppc_elf_link_hash_entry *) h;
2495 linker_section_ptr
2496 = elf_find_pointer_linker_section (eh->linker_section_pointer,
2497 rel->r_addend,
2498 lsect);
2499
2500 BFD_ASSERT (linker_section_ptr != NULL);
2501
2502 if (! elf_hash_table (info)->dynamic_sections_created
2503 || (info->shared
2504 && info->symbolic
2505 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
2506 {
2507 /* This is actually a static link, or it is a
2508 -Bsymbolic link and the symbol is defined
2509 locally. We must initialize this entry in the
2510 global section.
2511
2512 When doing a dynamic link, we create a .rela.<xxx>
2513 relocation entry to initialize the value. This
2514 is done in the finish_dynamic_symbol routine. */
2515 if (!linker_section_ptr->written_address_p)
2516 {
2517 linker_section_ptr->written_address_p = TRUE;
2518 bfd_put_ptr (output_bfd,
2519 relocation + linker_section_ptr->addend,
2520 (lsect->section->contents
2521 + linker_section_ptr->offset));
2522 }
2523 }
2524 }
2525 else
2526 {
2527 /* Handle local symbol. */
2528 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2529 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
2530 BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
2531 linker_section_ptr = (elf_find_pointer_linker_section
2532 (elf_local_ptr_offsets (input_bfd)[r_symndx],
2533 rel->r_addend,
2534 lsect));
2535
2536 BFD_ASSERT (linker_section_ptr != NULL);
2537
2538 /* Write out pointer if it hasn't been rewritten out before. */
2539 if (!linker_section_ptr->written_address_p)
2540 {
2541 linker_section_ptr->written_address_p = TRUE;
2542 bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
2543 lsect->section->contents + linker_section_ptr->offset);
2544
2545 if (info->shared)
2546 {
2547 /* We need to generate a relative reloc for the dynamic
2548 linker. */
2549
2550 asection *srel = lsect->rel_section;
2551 Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL];
2552 bfd_byte *erel;
2553 const struct elf_backend_data *bed;
2554 unsigned int i;
2555
2556 BFD_ASSERT (srel != NULL);
2557
2558 bed = get_elf_backend_data (output_bfd);
2559 for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
2560 {
2561 outrel[i].r_offset = (lsect->section->output_section->vma
2562 + lsect->section->output_offset
2563 + linker_section_ptr->offset);
2564 outrel[i].r_info = 0;
2565 outrel[i].r_addend = 0;
2566 }
2567 outrel[0].r_info = ELF32_R_INFO (0, relative_reloc);
2568 erel = lsect->section->contents;
2569 erel += (elf_section_data (lsect->section)->rel_count++
2570 * sizeof (Elf32_External_Rela));
2571 bfd_elf32_swap_reloca_out (output_bfd, outrel, erel);
2572 }
2573 }
2574 }
2575
2576 relocation = (lsect->section->output_offset
2577 + linker_section_ptr->offset
2578 - lsect->sym_offset);
2579
2580 #ifdef DEBUG
2581 fprintf (stderr,
2582 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
2583 lsect->name, (long) relocation, (long) relocation);
2584 #endif
2585
2586 /* Subtract out the addend, because it will get added back in by the normal
2587 processing. */
2588 return relocation - linker_section_ptr->addend;
2589 }
2590 \f
2591 /* Create a special linker section */
2592 static elf_linker_section_t *
2593 ppc_elf_create_linker_section (bfd *abfd,
2594 struct bfd_link_info *info,
2595 enum elf_linker_section_enum which)
2596 {
2597 elf_linker_section_t *lsect;
2598 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2599 asection *s;
2600 bfd_size_type amt;
2601 flagword flags;
2602 const char *name;
2603 const char *rel_name;
2604 const char *sym_name;
2605 bfd_vma sym_offset;
2606
2607 /* Both of these sections are (technically) created by the user
2608 putting data in them, so they shouldn't be marked
2609 SEC_LINKER_CREATED.
2610
2611 The linker creates them so it has somewhere to attach their
2612 respective symbols. In fact, if they were empty it would
2613 be OK to leave the symbol set to 0 (or any random number), because
2614 the appropriate register should never be used. */
2615 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
2616 sym_offset = 32768;
2617
2618 switch (which)
2619 {
2620 default:
2621 abort ();
2622 return NULL;
2623
2624 case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
2625 name = ".sdata";
2626 rel_name = ".rela.sdata";
2627 sym_name = "_SDA_BASE_";
2628 break;
2629
2630 case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
2631 name = ".sdata2";
2632 rel_name = ".rela.sdata2";
2633 sym_name = "_SDA2_BASE_";
2634 flags |= SEC_READONLY;
2635 break;
2636 }
2637
2638 /* Record the first bfd that needs the special sections. */
2639 if (!htab->elf.dynobj)
2640 htab->elf.dynobj = abfd;
2641
2642 amt = sizeof (elf_linker_section_t);
2643 lsect = bfd_zalloc (htab->elf.dynobj, amt);
2644
2645 lsect->sym_offset = sym_offset;
2646
2647 /* See if the sections already exist. */
2648 s = bfd_get_section_by_name (htab->elf.dynobj, name);
2649 if (s == NULL || (s->flags & flags) != flags)
2650 {
2651 s = bfd_make_section_anyway (htab->elf.dynobj, name);
2652 if (s == NULL
2653 || !bfd_set_section_flags (htab->elf.dynobj, s, flags))
2654 return NULL;
2655 }
2656 lsect->section = s;
2657
2658 if (bfd_get_section_alignment (htab->elf.dynobj, s) < 2
2659 && !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2660 return NULL;
2661
2662 s->_raw_size = align_power (s->_raw_size, 2);
2663
2664 #ifdef DEBUG
2665 fprintf (stderr, "Creating section %s, current size = %ld\n",
2666 name, (long) s->_raw_size);
2667 #endif
2668
2669 if (sym_name)
2670 {
2671 struct elf_link_hash_entry *h;
2672 struct bfd_link_hash_entry *bh;
2673
2674 #ifdef DEBUG
2675 fprintf (stderr, "Adding %s to section %s\n", sym_name, name);
2676 #endif
2677 bh = bfd_link_hash_lookup (info->hash, sym_name,
2678 FALSE, FALSE, FALSE);
2679
2680 if ((bh == NULL || bh->type == bfd_link_hash_undefined)
2681 && !(_bfd_generic_link_add_one_symbol
2682 (info, abfd, sym_name, BSF_GLOBAL, s, sym_offset, NULL,
2683 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
2684 return NULL;
2685 h = (struct elf_link_hash_entry *) bh;
2686
2687 h->type = STT_OBJECT;
2688 lsect->sym_hash = h;
2689
2690 if (info->shared
2691 && ! _bfd_elf_link_record_dynamic_symbol (info, h))
2692 return NULL;
2693 }
2694
2695 if (info->shared)
2696 {
2697 s = bfd_make_section_anyway (htab->elf.dynobj, rel_name);
2698 lsect->rel_section = s;
2699 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2700 | SEC_LINKER_CREATED | SEC_READONLY);
2701 if (s == NULL
2702 || ! bfd_set_section_flags (htab->elf.dynobj, s, flags)
2703 || ! bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2704 return NULL;
2705 }
2706
2707 return lsect;
2708 }
2709 \f
2710 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
2711 need to bump up the number of section headers. */
2712
2713 static int
2714 ppc_elf_additional_program_headers (bfd *abfd)
2715 {
2716 asection *s;
2717 int ret;
2718
2719 ret = 0;
2720
2721 s = bfd_get_section_by_name (abfd, ".interp");
2722 if (s != NULL)
2723 ++ret;
2724
2725 s = bfd_get_section_by_name (abfd, ".sbss2");
2726 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2727 ++ret;
2728
2729 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2730 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
2731 ++ret;
2732
2733 return ret;
2734 }
2735
2736 /* Modify the segment map if needed. */
2737
2738 static bfd_boolean
2739 ppc_elf_modify_segment_map (bfd *abfd ATTRIBUTE_UNUSED,
2740 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2741 {
2742 return TRUE;
2743 }
2744 \f
2745 /* The powerpc .got has a blrl instruction in it. Mark it executable. */
2746
2747 static bfd_boolean
2748 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2749 {
2750 struct ppc_elf_link_hash_table *htab;
2751 asection *s;
2752 flagword flags;
2753
2754 if (!_bfd_elf_create_got_section (abfd, info))
2755 return FALSE;
2756
2757 htab = ppc_elf_hash_table (info);
2758 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2759 if (s == NULL)
2760 abort ();
2761
2762 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2763 | SEC_LINKER_CREATED);
2764 if (!bfd_set_section_flags (abfd, s, flags))
2765 return FALSE;
2766
2767 htab->relgot = bfd_make_section (abfd, ".rela.got");
2768 if (!htab->relgot
2769 || ! bfd_set_section_flags (abfd, htab->relgot,
2770 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2771 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2772 | SEC_READONLY))
2773 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2774 return FALSE;
2775
2776 return TRUE;
2777 }
2778
2779 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2780 to output sections (just like _bfd_elf_create_dynamic_sections has
2781 to create .dynbss and .rela.bss). */
2782
2783 static bfd_boolean
2784 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2785 {
2786 struct ppc_elf_link_hash_table *htab;
2787 asection *s;
2788 flagword flags;
2789
2790 htab = ppc_elf_hash_table (info);
2791
2792 if (htab->got == NULL
2793 && !ppc_elf_create_got (abfd, info))
2794 return FALSE;
2795
2796 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2797 return FALSE;
2798
2799 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2800 | SEC_LINKER_CREATED);
2801
2802 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2803 htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
2804 if (s == NULL
2805 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
2806 return FALSE;
2807
2808 if (! info->shared)
2809 {
2810 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2811 htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss");
2812 if (s == NULL
2813 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
2814 || ! bfd_set_section_alignment (abfd, s, 2))
2815 return FALSE;
2816 }
2817
2818 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2819 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2820 if (s == NULL)
2821 abort ();
2822
2823 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
2824 return bfd_set_section_flags (abfd, s, flags);
2825 }
2826
2827 /* Adjust a symbol defined by a dynamic object and referenced by a
2828 regular object. The current definition is in some section of the
2829 dynamic object, but we're not including those sections. We have to
2830 change the definition to something the rest of the link can
2831 understand. */
2832
2833 static bfd_boolean
2834 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2835 struct elf_link_hash_entry *h)
2836 {
2837 struct ppc_elf_link_hash_table *htab;
2838 asection *s;
2839 unsigned int power_of_two;
2840
2841 #ifdef DEBUG
2842 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
2843 h->root.root.string);
2844 #endif
2845
2846 /* Make sure we know what is going on here. */
2847 htab = ppc_elf_hash_table (info);
2848 BFD_ASSERT (htab->elf.dynobj != NULL
2849 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2850 || h->weakdef != NULL
2851 || ((h->elf_link_hash_flags
2852 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2853 && (h->elf_link_hash_flags
2854 & ELF_LINK_HASH_REF_REGULAR) != 0
2855 && (h->elf_link_hash_flags
2856 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2857
2858 /* Deal with function syms. */
2859 if (h->type == STT_FUNC
2860 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2861 {
2862 /* Clear procedure linkage table information for any symbol that
2863 won't need a .plt entry. */
2864 if (h->plt.refcount <= 0
2865 || SYMBOL_CALLS_LOCAL (info, h)
2866 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2867 && h->root.type == bfd_link_hash_undefweak))
2868 {
2869 /* A PLT entry is not required/allowed when:
2870
2871 1. We are not using ld.so; because then the PLT entry
2872 can't be set up, so we can't use one. In this case,
2873 ppc_elf_adjust_dynamic_symbol won't even be called.
2874
2875 2. GC has rendered the entry unused.
2876
2877 3. We know for certain that a call to this symbol
2878 will go to this object, or will remain undefined. */
2879 h->plt.offset = (bfd_vma) -1;
2880 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2881 }
2882 return TRUE;
2883 }
2884 else
2885 h->plt.offset = (bfd_vma) -1;
2886
2887 /* If this is a weak symbol, and there is a real definition, the
2888 processor independent code will have arranged for us to see the
2889 real definition first, and we can just use the same value. */
2890 if (h->weakdef != NULL)
2891 {
2892 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2893 || h->weakdef->root.type == bfd_link_hash_defweak);
2894 h->root.u.def.section = h->weakdef->root.u.def.section;
2895 h->root.u.def.value = h->weakdef->root.u.def.value;
2896 if (ELIMINATE_COPY_RELOCS)
2897 h->elf_link_hash_flags
2898 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
2899 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
2900 return TRUE;
2901 }
2902
2903 /* This is a reference to a symbol defined by a dynamic object which
2904 is not a function. */
2905
2906 /* If we are creating a shared library, we must presume that the
2907 only references to the symbol are via the global offset table.
2908 For such cases we need not do anything here; the relocations will
2909 be handled correctly by relocate_section. */
2910 if (info->shared)
2911 return TRUE;
2912
2913 /* If there are no references to this symbol that do not use the
2914 GOT, we don't need to generate a copy reloc. */
2915 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
2916 return TRUE;
2917
2918 if (ELIMINATE_COPY_RELOCS)
2919 {
2920 struct ppc_elf_dyn_relocs *p;
2921 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
2922 {
2923 s = p->sec->output_section;
2924 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2925 break;
2926 }
2927
2928 /* If we didn't find any dynamic relocs in read-only sections, then
2929 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2930 if (p == NULL)
2931 {
2932 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
2933 return TRUE;
2934 }
2935 }
2936
2937 /* We must allocate the symbol in our .dynbss section, which will
2938 become part of the .bss section of the executable. There will be
2939 an entry for this symbol in the .dynsym section. The dynamic
2940 object will contain position independent code, so all references
2941 from the dynamic object to this symbol will go through the global
2942 offset table. The dynamic linker will use the .dynsym entry to
2943 determine the address it must put in the global offset table, so
2944 both the dynamic object and the regular object will refer to the
2945 same memory location for the variable.
2946
2947 Of course, if the symbol is sufficiently small, we must instead
2948 allocate it in .sbss. FIXME: It would be better to do this if and
2949 only if there were actually SDAREL relocs for that symbol. */
2950
2951 if (h->size <= elf_gp_size (htab->elf.dynobj))
2952 s = htab->dynsbss;
2953 else
2954 s = htab->dynbss;
2955 BFD_ASSERT (s != NULL);
2956
2957 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
2958 copy the initial value out of the dynamic object and into the
2959 runtime process image. We need to remember the offset into the
2960 .rela.bss section we are going to use. */
2961 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2962 {
2963 asection *srel;
2964
2965 if (h->size <= elf_gp_size (htab->elf.dynobj))
2966 srel = htab->relsbss;
2967 else
2968 srel = htab->relbss;
2969 BFD_ASSERT (srel != NULL);
2970 srel->_raw_size += sizeof (Elf32_External_Rela);
2971 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2972 }
2973
2974 /* We need to figure out the alignment required for this symbol. I
2975 have no idea how ELF linkers handle this. */
2976 power_of_two = bfd_log2 (h->size);
2977 if (power_of_two > 4)
2978 power_of_two = 4;
2979
2980 /* Apply the required alignment. */
2981 s->_raw_size = BFD_ALIGN (s->_raw_size,
2982 (bfd_size_type) (1 << power_of_two));
2983 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
2984 {
2985 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
2986 return FALSE;
2987 }
2988
2989 /* Define the symbol as being at this point in the section. */
2990 h->root.u.def.section = s;
2991 h->root.u.def.value = s->_raw_size;
2992
2993 /* Increment the section size to make room for the symbol. */
2994 s->_raw_size += h->size;
2995
2996 return TRUE;
2997 }
2998 \f
2999 /* This is the condition under which finish_dynamic_symbol will be
3000 called from elflink.h. If elflink.h doesn't call our
3001 finish_dynamic_symbol routine, we'll need to do something about
3002 initializing any .plt and .got entries in relocate_section. */
3003 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
3004 ((DYN) \
3005 && ((SHARED) \
3006 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
3007 && ((H)->dynindx != -1 \
3008 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
3009
3010 /* Of those relocs that might be copied as dynamic relocs, this macro
3011 selects those that must be copied when linking a shared library,
3012 even when the symbol is local. */
3013
3014 #define MUST_BE_DYN_RELOC(RTYPE) \
3015 ((RTYPE) != R_PPC_REL24 \
3016 && (RTYPE) != R_PPC_REL14 \
3017 && (RTYPE) != R_PPC_REL14_BRTAKEN \
3018 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
3019 && (RTYPE) != R_PPC_REL32)
3020
3021 /* Allocate space in associated reloc sections for dynamic relocs. */
3022
3023 static bfd_boolean
3024 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3025 {
3026 struct bfd_link_info *info = inf;
3027 struct ppc_elf_link_hash_entry *eh;
3028 struct ppc_elf_link_hash_table *htab;
3029 struct ppc_elf_dyn_relocs *p;
3030
3031 if (h->root.type == bfd_link_hash_indirect)
3032 return TRUE;
3033
3034 if (h->root.type == bfd_link_hash_warning)
3035 /* When warning symbols are created, they **replace** the "real"
3036 entry in the hash table, thus we never get to see the real
3037 symbol in a hash traversal. So look at it now. */
3038 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3039
3040 htab = ppc_elf_hash_table (info);
3041 if (htab->elf.dynamic_sections_created
3042 && h->plt.refcount > 0)
3043 {
3044 /* Make sure this symbol is output as a dynamic symbol. */
3045 if (h->dynindx == -1
3046 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3047 {
3048 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
3049 return FALSE;
3050 }
3051
3052 if (info->shared
3053 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3054 {
3055 asection *s = htab->plt;
3056
3057 /* If this is the first .plt entry, make room for the special
3058 first entry. */
3059 if (s->_raw_size == 0)
3060 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
3061
3062 /* The PowerPC PLT is actually composed of two parts, the
3063 first part is 2 words (for a load and a jump), and then
3064 there is a remaining word available at the end. */
3065 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
3066 + (PLT_SLOT_SIZE
3067 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE)
3068 / PLT_ENTRY_SIZE)));
3069
3070 /* If this symbol is not defined in a regular file, and we
3071 are not generating a shared library, then set the symbol
3072 to this location in the .plt. This is required to make
3073 function pointers compare as equal between the normal
3074 executable and the shared library. */
3075 if (! info->shared
3076 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3077 {
3078 h->root.u.def.section = s;
3079 h->root.u.def.value = h->plt.offset;
3080 }
3081
3082 /* Make room for this entry. After the 8192nd entry, room
3083 for two entries is allocated. */
3084 s->_raw_size += PLT_ENTRY_SIZE;
3085 if ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
3086 > PLT_NUM_SINGLE_ENTRIES)
3087 s->_raw_size += PLT_ENTRY_SIZE;
3088
3089 /* We also need to make an entry in the .rela.plt section. */
3090 htab->relplt->_raw_size += sizeof (Elf32_External_Rela);
3091 }
3092 else
3093 {
3094 h->plt.offset = (bfd_vma) -1;
3095 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3096 }
3097 }
3098 else
3099 {
3100 h->plt.offset = (bfd_vma) -1;
3101 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3102 }
3103
3104 eh = (struct ppc_elf_link_hash_entry *) h;
3105 if (eh->elf.got.refcount > 0)
3106 {
3107 /* Make sure this symbol is output as a dynamic symbol. */
3108 if (eh->elf.dynindx == -1
3109 && (eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3110 {
3111 if (!bfd_elf32_link_record_dynamic_symbol (info, &eh->elf))
3112 return FALSE;
3113 }
3114
3115 if (eh->tls_mask == (TLS_TLS | TLS_LD)
3116 && !(eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
3117 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
3118 eh->elf.got.offset = (bfd_vma) -1;
3119 else
3120 {
3121 bfd_boolean dyn;
3122 eh->elf.got.offset = htab->got->_raw_size;
3123 if ((eh->tls_mask & TLS_TLS) != 0)
3124 {
3125 if ((eh->tls_mask & TLS_LD) != 0)
3126 htab->got->_raw_size += 8;
3127 if ((eh->tls_mask & TLS_GD) != 0)
3128 htab->got->_raw_size += 8;
3129 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
3130 htab->got->_raw_size += 4;
3131 if ((eh->tls_mask & TLS_DTPREL) != 0)
3132 htab->got->_raw_size += 4;
3133 }
3134 else
3135 htab->got->_raw_size += 4;
3136 dyn = htab->elf.dynamic_sections_created;
3137 if ((info->shared
3138 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
3139 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
3140 || eh->elf.root.type != bfd_link_hash_undefweak))
3141 {
3142 /* All the entries we allocated need relocs. */
3143 htab->relgot->_raw_size
3144 += ((htab->got->_raw_size - eh->elf.got.offset) / 4
3145 * sizeof (Elf32_External_Rela));
3146 /* Except LD only needs one. */
3147 if ((eh->tls_mask & TLS_LD) != 0)
3148 htab->relgot->_raw_size -= sizeof (Elf32_External_Rela);
3149 }
3150 }
3151 }
3152 else
3153 eh->elf.got.offset = (bfd_vma) -1;
3154
3155 if (eh->dyn_relocs == NULL)
3156 return TRUE;
3157
3158 /* In the shared -Bsymbolic case, discard space allocated for
3159 dynamic pc-relative relocs against symbols which turn out to be
3160 defined in regular objects. For the normal shared case, discard
3161 space for relocs that have become local due to symbol visibility
3162 changes. */
3163
3164 if (info->shared)
3165 {
3166 /* Relocs that use pc_count are those that appear on a call insn,
3167 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
3168 generated via assembly. We want calls to protected symbols to
3169 resolve directly to the function rather than going via the plt.
3170 If people want function pointer comparisons to work as expected
3171 then they should avoid writing weird assembly. */
3172 if (SYMBOL_CALLS_LOCAL (info, h))
3173 {
3174 struct ppc_elf_dyn_relocs **pp;
3175
3176 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3177 {
3178 p->count -= p->pc_count;
3179 p->pc_count = 0;
3180 if (p->count == 0)
3181 *pp = p->next;
3182 else
3183 pp = &p->next;
3184 }
3185 }
3186
3187 /* Also discard relocs on undefined weak syms with non-default
3188 visibility. */
3189 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3190 && h->root.type == bfd_link_hash_undefweak)
3191 eh->dyn_relocs = NULL;
3192 }
3193 else if (ELIMINATE_COPY_RELOCS)
3194 {
3195 /* For the non-shared case, discard space for relocs against
3196 symbols which turn out to need copy relocs or are not
3197 dynamic. */
3198
3199 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3200 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3201 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3202 {
3203 /* Make sure this symbol is output as a dynamic symbol.
3204 Undefined weak syms won't yet be marked as dynamic. */
3205 if (h->dynindx == -1
3206 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3207 {
3208 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
3209 return FALSE;
3210 }
3211
3212 /* If that succeeded, we know we'll be keeping all the
3213 relocs. */
3214 if (h->dynindx != -1)
3215 goto keep;
3216 }
3217
3218 eh->dyn_relocs = NULL;
3219
3220 keep: ;
3221 }
3222
3223 /* Finally, allocate space. */
3224 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3225 {
3226 asection *sreloc = elf_section_data (p->sec)->sreloc;
3227 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
3228 }
3229
3230 return TRUE;
3231 }
3232
3233 /* Find any dynamic relocs that apply to read-only sections. */
3234
3235 static bfd_boolean
3236 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
3237 {
3238 struct ppc_elf_dyn_relocs *p;
3239
3240 if (h->root.type == bfd_link_hash_indirect)
3241 return TRUE;
3242
3243 if (h->root.type == bfd_link_hash_warning)
3244 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3245
3246 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3247 {
3248 asection *s = p->sec->output_section;
3249
3250 if (s != NULL
3251 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
3252 == (SEC_READONLY | SEC_ALLOC)))
3253 {
3254 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
3255
3256 /* Not an error, just cut short the traversal. */
3257 return FALSE;
3258 }
3259 }
3260 return TRUE;
3261 }
3262
3263 /* Set the sizes of the dynamic sections. */
3264
3265 static bfd_boolean
3266 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3267 struct bfd_link_info *info)
3268 {
3269 struct ppc_elf_link_hash_table *htab;
3270 asection *s;
3271 bfd_boolean relocs;
3272 bfd *ibfd;
3273
3274 #ifdef DEBUG
3275 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
3276 #endif
3277
3278 htab = ppc_elf_hash_table (info);
3279 BFD_ASSERT (htab->elf.dynobj != NULL);
3280
3281 if (elf_hash_table (info)->dynamic_sections_created)
3282 {
3283 /* Set the contents of the .interp section to the interpreter. */
3284 if (info->executable)
3285 {
3286 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
3287 BFD_ASSERT (s != NULL);
3288 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3289 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3290 }
3291 }
3292
3293 if (htab->tlsld_got.refcount > 0)
3294 {
3295 htab->tlsld_got.offset = htab->got->_raw_size;
3296 htab->got->_raw_size += 8;
3297 if (info->shared)
3298 htab->relgot->_raw_size += sizeof (Elf32_External_Rela);
3299 }
3300 else
3301 htab->tlsld_got.offset = (bfd_vma) -1;
3302
3303 /* Set up .got offsets for local syms, and space for local dynamic
3304 relocs. */
3305 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3306 {
3307 bfd_signed_vma *local_got;
3308 bfd_signed_vma *end_local_got;
3309 char *lgot_masks;
3310 bfd_size_type locsymcount;
3311 Elf_Internal_Shdr *symtab_hdr;
3312 asection *srel;
3313
3314 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
3315 continue;
3316
3317 for (s = ibfd->sections; s != NULL; s = s->next)
3318 {
3319 struct ppc_elf_dyn_relocs *p;
3320
3321 for (p = ((struct ppc_elf_dyn_relocs *)
3322 elf_section_data (s)->local_dynrel);
3323 p != NULL;
3324 p = p->next)
3325 {
3326 if (!bfd_is_abs_section (p->sec)
3327 && bfd_is_abs_section (p->sec->output_section))
3328 {
3329 /* Input section has been discarded, either because
3330 it is a copy of a linkonce section or due to
3331 linker script /DISCARD/, so we'll be discarding
3332 the relocs too. */
3333 }
3334 else if (p->count != 0)
3335 {
3336 elf_section_data (p->sec)->sreloc->_raw_size
3337 += p->count * sizeof (Elf32_External_Rela);
3338 if ((p->sec->output_section->flags
3339 & (SEC_READONLY | SEC_ALLOC))
3340 == (SEC_READONLY | SEC_ALLOC))
3341 info->flags |= DF_TEXTREL;
3342 }
3343 }
3344 }
3345
3346 local_got = elf_local_got_refcounts (ibfd);
3347 if (!local_got)
3348 continue;
3349
3350 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3351 locsymcount = symtab_hdr->sh_info;
3352 end_local_got = local_got + locsymcount;
3353 lgot_masks = (char *) end_local_got;
3354 s = htab->got;
3355 srel = htab->relgot;
3356 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3357 if (*local_got > 0)
3358 {
3359 if (*lgot_masks == (TLS_TLS | TLS_LD))
3360 {
3361 /* If just an LD reloc, we'll just use
3362 htab->tlsld_got.offset. */
3363 if (htab->tlsld_got.offset == (bfd_vma) -1)
3364 {
3365 htab->tlsld_got.offset = s->_raw_size;
3366 s->_raw_size += 8;
3367 if (info->shared)
3368 srel->_raw_size += sizeof (Elf32_External_Rela);
3369 }
3370 *local_got = (bfd_vma) -1;
3371 }
3372 else
3373 {
3374 *local_got = s->_raw_size;
3375 if ((*lgot_masks & TLS_TLS) != 0)
3376 {
3377 if ((*lgot_masks & TLS_GD) != 0)
3378 s->_raw_size += 8;
3379 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
3380 s->_raw_size += 4;
3381 if ((*lgot_masks & TLS_DTPREL) != 0)
3382 s->_raw_size += 4;
3383 }
3384 else
3385 s->_raw_size += 4;
3386 if (info->shared)
3387 srel->_raw_size += ((s->_raw_size - *local_got) / 4
3388 * sizeof (Elf32_External_Rela));
3389 }
3390 }
3391 else
3392 *local_got = (bfd_vma) -1;
3393 }
3394
3395 /* Allocate space for global sym dynamic relocs. */
3396 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3397
3398 /* We've now determined the sizes of the various dynamic sections.
3399 Allocate memory for them. */
3400 relocs = FALSE;
3401 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
3402 {
3403 if ((s->flags & SEC_LINKER_CREATED) == 0)
3404 continue;
3405
3406 if (s == htab->plt
3407 || s == htab->got
3408 || (htab->sdata != NULL && s == htab->sdata->section)
3409 || (htab->sdata2 != NULL && s == htab->sdata2->section))
3410 {
3411 /* Strip this section if we don't need it; see the
3412 comment below. */
3413 }
3414 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
3415 {
3416 if (s->_raw_size == 0)
3417 {
3418 /* If we don't need this section, strip it from the
3419 output file. This is mostly to handle .rela.bss and
3420 .rela.plt. We must create both sections in
3421 create_dynamic_sections, because they must be created
3422 before the linker maps input sections to output
3423 sections. The linker does that before
3424 adjust_dynamic_symbol is called, and it is that
3425 function which decides whether anything needs to go
3426 into these sections. */
3427 }
3428 else
3429 {
3430 /* Remember whether there are any relocation sections. */
3431 relocs = TRUE;
3432
3433 /* We use the reloc_count field as a counter if we need
3434 to copy relocs into the output file. */
3435 s->reloc_count = 0;
3436 }
3437 }
3438 else
3439 {
3440 /* It's not one of our sections, so don't allocate space. */
3441 continue;
3442 }
3443
3444 if (s->_raw_size == 0)
3445 {
3446 _bfd_strip_section_from_output (info, s);
3447 continue;
3448 }
3449
3450 /* Allocate memory for the section contents. */
3451 s->contents = bfd_zalloc (htab->elf.dynobj, s->_raw_size);
3452 if (s->contents == NULL)
3453 return FALSE;
3454 }
3455
3456 if (htab->elf.dynamic_sections_created)
3457 {
3458 /* Add some entries to the .dynamic section. We fill in the
3459 values later, in ppc_elf_finish_dynamic_sections, but we
3460 must add the entries now so that we get the correct size for
3461 the .dynamic section. The DT_DEBUG entry is filled in by the
3462 dynamic linker and used by the debugger. */
3463 #define add_dynamic_entry(TAG, VAL) \
3464 bfd_elf32_add_dynamic_entry (info, (TAG), (VAL))
3465
3466 if (info->executable)
3467 {
3468 if (!add_dynamic_entry (DT_DEBUG, 0))
3469 return FALSE;
3470 }
3471
3472 if (htab->plt != NULL && htab->plt->_raw_size != 0)
3473 {
3474 if (!add_dynamic_entry (DT_PLTGOT, 0)
3475 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3476 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3477 || !add_dynamic_entry (DT_JMPREL, 0))
3478 return FALSE;
3479 }
3480
3481 if (relocs)
3482 {
3483 if (!add_dynamic_entry (DT_RELA, 0)
3484 || !add_dynamic_entry (DT_RELASZ, 0)
3485 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3486 return FALSE;
3487 }
3488
3489 /* If any dynamic relocs apply to a read-only section, then we
3490 need a DT_TEXTREL entry. */
3491 if ((info->flags & DF_TEXTREL) == 0)
3492 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
3493 info);
3494
3495 if ((info->flags & DF_TEXTREL) != 0)
3496 {
3497 if (!add_dynamic_entry (DT_TEXTREL, 0))
3498 return FALSE;
3499 }
3500 }
3501 #undef add_dynamic_entry
3502
3503 return TRUE;
3504 }
3505 \f
3506 static bfd_boolean
3507 update_local_sym_info (bfd *abfd,
3508 Elf_Internal_Shdr *symtab_hdr,
3509 unsigned long r_symndx,
3510 int tls_type)
3511 {
3512 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3513 char *local_got_tls_masks;
3514
3515 if (local_got_refcounts == NULL)
3516 {
3517 bfd_size_type size = symtab_hdr->sh_info;
3518
3519 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3520 local_got_refcounts = bfd_zalloc (abfd, size);
3521 if (local_got_refcounts == NULL)
3522 return FALSE;
3523 elf_local_got_refcounts (abfd) = local_got_refcounts;
3524 }
3525
3526 local_got_refcounts[r_symndx] += 1;
3527 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3528 local_got_tls_masks[r_symndx] |= tls_type;
3529 return TRUE;
3530 }
3531
3532 static void
3533 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3534 {
3535 (*_bfd_error_handler)
3536 (_("%s: relocation %s cannot be used when making a shared object"),
3537 bfd_archive_filename (abfd),
3538 ppc_elf_howto_table[r_type]->name);
3539 bfd_set_error (bfd_error_bad_value);
3540 }
3541
3542 /* Look through the relocs for a section during the first phase, and
3543 allocate space in the global offset table or procedure linkage
3544 table. */
3545
3546 static bfd_boolean
3547 ppc_elf_check_relocs (bfd *abfd,
3548 struct bfd_link_info *info,
3549 asection *sec,
3550 const Elf_Internal_Rela *relocs)
3551 {
3552 struct ppc_elf_link_hash_table *htab;
3553 Elf_Internal_Shdr *symtab_hdr;
3554 struct elf_link_hash_entry **sym_hashes;
3555 const Elf_Internal_Rela *rel;
3556 const Elf_Internal_Rela *rel_end;
3557 asection *sreloc;
3558
3559 if (info->relocatable)
3560 return TRUE;
3561
3562 #ifdef DEBUG
3563 fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n",
3564 bfd_get_section_name (abfd, sec),
3565 bfd_archive_filename (abfd));
3566 #endif
3567
3568 /* Initialize howto table if not already done. */
3569 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3570 ppc_elf_howto_init ();
3571
3572 /* Create the linker generated sections all the time so that the
3573 special symbols are created. */
3574 htab = ppc_elf_hash_table (info);
3575 if (htab->sdata == NULL)
3576 {
3577 htab->sdata = ppc_elf_create_linker_section (abfd, info,
3578 LINKER_SECTION_SDATA);
3579 if (htab->sdata == NULL)
3580 return FALSE;
3581 }
3582
3583 if (htab->sdata2 == NULL)
3584 {
3585 htab->sdata2 = ppc_elf_create_linker_section (abfd, info,
3586 LINKER_SECTION_SDATA2);
3587 if (htab->sdata2 == NULL)
3588 return FALSE;
3589 }
3590
3591 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3592 sym_hashes = elf_sym_hashes (abfd);
3593 sreloc = NULL;
3594
3595 rel_end = relocs + sec->reloc_count;
3596 for (rel = relocs; rel < rel_end; rel++)
3597 {
3598 unsigned long r_symndx;
3599 enum elf_ppc_reloc_type r_type;
3600 struct elf_link_hash_entry *h;
3601 int tls_type = 0;
3602
3603 r_symndx = ELF32_R_SYM (rel->r_info);
3604 if (r_symndx < symtab_hdr->sh_info)
3605 h = NULL;
3606 else
3607 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3608
3609 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3610 This shows up in particular in an R_PPC_ADDR32 in the eabi
3611 startup code. */
3612 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3613 {
3614 if (htab->got == NULL)
3615 {
3616 if (htab->elf.dynobj == NULL)
3617 htab->elf.dynobj = abfd;
3618 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3619 return FALSE;
3620 }
3621 }
3622
3623 r_type = ELF32_R_TYPE (rel->r_info);
3624 switch (r_type)
3625 {
3626 case R_PPC_GOT_TLSLD16:
3627 case R_PPC_GOT_TLSLD16_LO:
3628 case R_PPC_GOT_TLSLD16_HI:
3629 case R_PPC_GOT_TLSLD16_HA:
3630 htab->tlsld_got.refcount += 1;
3631 tls_type = TLS_TLS | TLS_LD;
3632 goto dogottls;
3633
3634 case R_PPC_GOT_TLSGD16:
3635 case R_PPC_GOT_TLSGD16_LO:
3636 case R_PPC_GOT_TLSGD16_HI:
3637 case R_PPC_GOT_TLSGD16_HA:
3638 tls_type = TLS_TLS | TLS_GD;
3639 goto dogottls;
3640
3641 case R_PPC_GOT_TPREL16:
3642 case R_PPC_GOT_TPREL16_LO:
3643 case R_PPC_GOT_TPREL16_HI:
3644 case R_PPC_GOT_TPREL16_HA:
3645 if (info->shared)
3646 info->flags |= DF_STATIC_TLS;
3647 tls_type = TLS_TLS | TLS_TPREL;
3648 goto dogottls;
3649
3650 case R_PPC_GOT_DTPREL16:
3651 case R_PPC_GOT_DTPREL16_LO:
3652 case R_PPC_GOT_DTPREL16_HI:
3653 case R_PPC_GOT_DTPREL16_HA:
3654 tls_type = TLS_TLS | TLS_DTPREL;
3655 dogottls:
3656 sec->has_tls_reloc = 1;
3657 /* Fall thru */
3658
3659 /* GOT16 relocations */
3660 case R_PPC_GOT16:
3661 case R_PPC_GOT16_LO:
3662 case R_PPC_GOT16_HI:
3663 case R_PPC_GOT16_HA:
3664 /* This symbol requires a global offset table entry. */
3665 if (htab->got == NULL)
3666 {
3667 if (htab->elf.dynobj == NULL)
3668 htab->elf.dynobj = abfd;
3669 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3670 return FALSE;
3671 }
3672 if (h != NULL)
3673 {
3674 h->got.refcount += 1;
3675 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3676 }
3677 else
3678 /* This is a global offset table entry for a local symbol. */
3679 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3680 return FALSE;
3681 break;
3682
3683 /* Indirect .sdata relocation. */
3684 case R_PPC_EMB_SDAI16:
3685 if (info->shared)
3686 {
3687 bad_shared_reloc (abfd, r_type);
3688 return FALSE;
3689 }
3690 if (!elf_create_pointer_linker_section (abfd, info,
3691 htab->sdata, h, rel))
3692 return FALSE;
3693 break;
3694
3695 /* Indirect .sdata2 relocation. */
3696 case R_PPC_EMB_SDA2I16:
3697 if (info->shared)
3698 {
3699 bad_shared_reloc (abfd, r_type);
3700 return FALSE;
3701 }
3702 if (!elf_create_pointer_linker_section (abfd, info,
3703 htab->sdata2, h, rel))
3704 return FALSE;
3705 break;
3706
3707 case R_PPC_SDAREL16:
3708 case R_PPC_EMB_SDA2REL:
3709 case R_PPC_EMB_SDA21:
3710 case R_PPC_EMB_RELSDA:
3711 case R_PPC_EMB_NADDR32:
3712 case R_PPC_EMB_NADDR16:
3713 case R_PPC_EMB_NADDR16_LO:
3714 case R_PPC_EMB_NADDR16_HI:
3715 case R_PPC_EMB_NADDR16_HA:
3716 if (info->shared)
3717 {
3718 bad_shared_reloc (abfd, r_type);
3719 return FALSE;
3720 }
3721 break;
3722
3723 case R_PPC_PLT32:
3724 case R_PPC_PLTREL24:
3725 case R_PPC_PLTREL32:
3726 case R_PPC_PLT16_LO:
3727 case R_PPC_PLT16_HI:
3728 case R_PPC_PLT16_HA:
3729 #ifdef DEBUG
3730 fprintf (stderr, "Reloc requires a PLT entry\n");
3731 #endif
3732 /* This symbol requires a procedure linkage table entry. We
3733 actually build the entry in finish_dynamic_symbol,
3734 because this might be a case of linking PIC code without
3735 linking in any dynamic objects, in which case we don't
3736 need to generate a procedure linkage table after all. */
3737
3738 if (h == NULL)
3739 {
3740 /* It does not make sense to have a procedure linkage
3741 table entry for a local symbol. */
3742 (*_bfd_error_handler) (_("%s(%s+0x%lx): %s reloc against "
3743 "local symbol"),
3744 bfd_archive_filename (abfd),
3745 sec->name,
3746 (long) rel->r_offset,
3747 ppc_elf_howto_table[r_type]->name);
3748 bfd_set_error (bfd_error_bad_value);
3749 return FALSE;
3750 }
3751
3752 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3753 h->plt.refcount++;
3754 break;
3755
3756 /* The following relocations don't need to propagate the
3757 relocation if linking a shared object since they are
3758 section relative. */
3759 case R_PPC_SECTOFF:
3760 case R_PPC_SECTOFF_LO:
3761 case R_PPC_SECTOFF_HI:
3762 case R_PPC_SECTOFF_HA:
3763 case R_PPC_DTPREL16:
3764 case R_PPC_DTPREL16_LO:
3765 case R_PPC_DTPREL16_HI:
3766 case R_PPC_DTPREL16_HA:
3767 case R_PPC_TOC16:
3768 break;
3769
3770 /* This are just markers. */
3771 case R_PPC_TLS:
3772 case R_PPC_EMB_MRKREF:
3773 case R_PPC_NONE:
3774 case R_PPC_max:
3775 break;
3776
3777 /* These should only appear in dynamic objects. */
3778 case R_PPC_COPY:
3779 case R_PPC_GLOB_DAT:
3780 case R_PPC_JMP_SLOT:
3781 case R_PPC_RELATIVE:
3782 break;
3783
3784 /* These aren't handled yet. We'll report an error later. */
3785 case R_PPC_ADDR30:
3786 case R_PPC_EMB_RELSEC16:
3787 case R_PPC_EMB_RELST_LO:
3788 case R_PPC_EMB_RELST_HI:
3789 case R_PPC_EMB_RELST_HA:
3790 case R_PPC_EMB_BIT_FLD:
3791 break;
3792
3793 /* This refers only to functions defined in the shared library. */
3794 case R_PPC_LOCAL24PC:
3795 break;
3796
3797 /* This relocation describes the C++ object vtable hierarchy.
3798 Reconstruct it for later use during GC. */
3799 case R_PPC_GNU_VTINHERIT:
3800 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3801 return FALSE;
3802 break;
3803
3804 /* This relocation describes which C++ vtable entries are actually
3805 used. Record for later use during GC. */
3806 case R_PPC_GNU_VTENTRY:
3807 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3808 return FALSE;
3809 break;
3810
3811 /* We shouldn't really be seeing these. */
3812 case R_PPC_TPREL32:
3813 if (info->shared)
3814 info->flags |= DF_STATIC_TLS;
3815 goto dodyn;
3816
3817 /* Nor these. */
3818 case R_PPC_DTPMOD32:
3819 case R_PPC_DTPREL32:
3820 goto dodyn;
3821
3822 case R_PPC_TPREL16:
3823 case R_PPC_TPREL16_LO:
3824 case R_PPC_TPREL16_HI:
3825 case R_PPC_TPREL16_HA:
3826 if (info->shared)
3827 info->flags |= DF_STATIC_TLS;
3828 goto dodyn;
3829
3830 /* When creating a shared object, we must copy these
3831 relocs into the output file. We create a reloc
3832 section in dynobj and make room for the reloc. */
3833 case R_PPC_REL24:
3834 case R_PPC_REL14:
3835 case R_PPC_REL14_BRTAKEN:
3836 case R_PPC_REL14_BRNTAKEN:
3837 case R_PPC_REL32:
3838 if (h == NULL
3839 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3840 break;
3841 /* fall through */
3842
3843 case R_PPC_ADDR32:
3844 case R_PPC_ADDR24:
3845 case R_PPC_ADDR16:
3846 case R_PPC_ADDR16_LO:
3847 case R_PPC_ADDR16_HI:
3848 case R_PPC_ADDR16_HA:
3849 case R_PPC_ADDR14:
3850 case R_PPC_ADDR14_BRTAKEN:
3851 case R_PPC_ADDR14_BRNTAKEN:
3852 case R_PPC_UADDR32:
3853 case R_PPC_UADDR16:
3854 if (h != NULL && !info->shared)
3855 {
3856 /* We may need a plt entry if the symbol turns out to be
3857 a function defined in a dynamic object. */
3858 h->plt.refcount++;
3859
3860 /* We may need a copy reloc too. */
3861 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3862 }
3863
3864 dodyn:
3865 /* If we are creating a shared library, and this is a reloc
3866 against a global symbol, or a non PC relative reloc
3867 against a local symbol, then we need to copy the reloc
3868 into the shared library. However, if we are linking with
3869 -Bsymbolic, we do not need to copy a reloc against a
3870 global symbol which is defined in an object we are
3871 including in the link (i.e., DEF_REGULAR is set). At
3872 this point we have not seen all the input files, so it is
3873 possible that DEF_REGULAR is not set now but will be set
3874 later (it is never cleared). In case of a weak definition,
3875 DEF_REGULAR may be cleared later by a strong definition in
3876 a shared library. We account for that possibility below by
3877 storing information in the dyn_relocs field of the hash
3878 table entry. A similar situation occurs when creating
3879 shared libraries and symbol visibility changes render the
3880 symbol local.
3881
3882 If on the other hand, we are creating an executable, we
3883 may need to keep relocations for symbols satisfied by a
3884 dynamic library if we manage to avoid copy relocs for the
3885 symbol. */
3886 if ((info->shared
3887 && (MUST_BE_DYN_RELOC (r_type)
3888 || (h != NULL
3889 && (! info->symbolic
3890 || h->root.type == bfd_link_hash_defweak
3891 || (h->elf_link_hash_flags
3892 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3893 || (ELIMINATE_COPY_RELOCS
3894 && !info->shared
3895 && (sec->flags & SEC_ALLOC) != 0
3896 && h != NULL
3897 && (h->root.type == bfd_link_hash_defweak
3898 || (h->elf_link_hash_flags
3899 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3900 {
3901 struct ppc_elf_dyn_relocs *p;
3902 struct ppc_elf_dyn_relocs **head;
3903
3904 #ifdef DEBUG
3905 fprintf (stderr,
3906 "ppc_elf_check_relocs needs to "
3907 "create relocation for %s\n",
3908 (h && h->root.root.string
3909 ? h->root.root.string : "<unknown>"));
3910 #endif
3911 if (sreloc == NULL)
3912 {
3913 const char *name;
3914
3915 name = (bfd_elf_string_from_elf_section
3916 (abfd,
3917 elf_elfheader (abfd)->e_shstrndx,
3918 elf_section_data (sec)->rel_hdr.sh_name));
3919 if (name == NULL)
3920 return FALSE;
3921
3922 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3923 && strcmp (bfd_get_section_name (abfd, sec),
3924 name + 5) == 0);
3925
3926 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3927 if (sreloc == NULL)
3928 {
3929 flagword flags;
3930
3931 sreloc = bfd_make_section (htab->elf.dynobj, name);
3932 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3933 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3934 if ((sec->flags & SEC_ALLOC) != 0)
3935 flags |= SEC_ALLOC | SEC_LOAD;
3936 if (sreloc == NULL
3937 || ! bfd_set_section_flags (htab->elf.dynobj,
3938 sreloc, flags)
3939 || ! bfd_set_section_alignment (htab->elf.dynobj,
3940 sreloc, 2))
3941 return FALSE;
3942 }
3943 elf_section_data (sec)->sreloc = sreloc;
3944 }
3945
3946 /* If this is a global symbol, we count the number of
3947 relocations we need for this symbol. */
3948 if (h != NULL)
3949 {
3950 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3951 }
3952 else
3953 {
3954 /* Track dynamic relocs needed for local syms too.
3955 We really need local syms available to do this
3956 easily. Oh well. */
3957
3958 asection *s;
3959 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3960 sec, r_symndx);
3961 if (s == NULL)
3962 return FALSE;
3963
3964 head = ((struct ppc_elf_dyn_relocs **)
3965 &elf_section_data (s)->local_dynrel);
3966 }
3967
3968 p = *head;
3969 if (p == NULL || p->sec != sec)
3970 {
3971 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3972 if (p == NULL)
3973 return FALSE;
3974 p->next = *head;
3975 *head = p;
3976 p->sec = sec;
3977 p->count = 0;
3978 p->pc_count = 0;
3979 }
3980
3981 p->count += 1;
3982 if (!MUST_BE_DYN_RELOC (r_type))
3983 p->pc_count += 1;
3984 }
3985
3986 break;
3987 }
3988 }
3989
3990 return TRUE;
3991 }
3992
3993 /* Return the section that should be marked against GC for a given
3994 relocation. */
3995
3996 static asection *
3997 ppc_elf_gc_mark_hook (asection *sec,
3998 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3999 Elf_Internal_Rela *rel,
4000 struct elf_link_hash_entry *h,
4001 Elf_Internal_Sym *sym)
4002 {
4003 if (h != NULL)
4004 {
4005 switch (ELF32_R_TYPE (rel->r_info))
4006 {
4007 case R_PPC_GNU_VTINHERIT:
4008 case R_PPC_GNU_VTENTRY:
4009 break;
4010
4011 default:
4012 switch (h->root.type)
4013 {
4014 case bfd_link_hash_defined:
4015 case bfd_link_hash_defweak:
4016 return h->root.u.def.section;
4017
4018 case bfd_link_hash_common:
4019 return h->root.u.c.p->section;
4020
4021 default:
4022 break;
4023 }
4024 }
4025 }
4026 else
4027 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4028
4029 return NULL;
4030 }
4031
4032 /* Update the got, plt and dynamic reloc reference counts for the
4033 section being removed. */
4034
4035 static bfd_boolean
4036 ppc_elf_gc_sweep_hook (bfd *abfd,
4037 struct bfd_link_info *info,
4038 asection *sec,
4039 const Elf_Internal_Rela *relocs)
4040 {
4041 struct ppc_elf_link_hash_table *htab;
4042 Elf_Internal_Shdr *symtab_hdr;
4043 struct elf_link_hash_entry **sym_hashes;
4044 bfd_signed_vma *local_got_refcounts;
4045 const Elf_Internal_Rela *rel, *relend;
4046
4047 elf_section_data (sec)->local_dynrel = NULL;
4048
4049 htab = ppc_elf_hash_table (info);
4050 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4051 sym_hashes = elf_sym_hashes (abfd);
4052 local_got_refcounts = elf_local_got_refcounts (abfd);
4053
4054 relend = relocs + sec->reloc_count;
4055 for (rel = relocs; rel < relend; rel++)
4056 {
4057 unsigned long r_symndx;
4058 enum elf_ppc_reloc_type r_type;
4059 struct elf_link_hash_entry *h = NULL;
4060
4061 r_symndx = ELF32_R_SYM (rel->r_info);
4062 if (r_symndx >= symtab_hdr->sh_info)
4063 {
4064 struct ppc_elf_dyn_relocs **pp, *p;
4065 struct ppc_elf_link_hash_entry *eh;
4066
4067 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4068 eh = (struct ppc_elf_link_hash_entry *) h;
4069
4070 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4071 if (p->sec == sec)
4072 {
4073 /* Everything must go for SEC. */
4074 *pp = p->next;
4075 break;
4076 }
4077 }
4078
4079 r_type = ELF32_R_TYPE (rel->r_info);
4080 switch (r_type)
4081 {
4082 case R_PPC_GOT_TLSLD16:
4083 case R_PPC_GOT_TLSLD16_LO:
4084 case R_PPC_GOT_TLSLD16_HI:
4085 case R_PPC_GOT_TLSLD16_HA:
4086 htab->tlsld_got.refcount -= 1;
4087 /* Fall thru */
4088
4089 case R_PPC_GOT_TLSGD16:
4090 case R_PPC_GOT_TLSGD16_LO:
4091 case R_PPC_GOT_TLSGD16_HI:
4092 case R_PPC_GOT_TLSGD16_HA:
4093 case R_PPC_GOT_TPREL16:
4094 case R_PPC_GOT_TPREL16_LO:
4095 case R_PPC_GOT_TPREL16_HI:
4096 case R_PPC_GOT_TPREL16_HA:
4097 case R_PPC_GOT_DTPREL16:
4098 case R_PPC_GOT_DTPREL16_LO:
4099 case R_PPC_GOT_DTPREL16_HI:
4100 case R_PPC_GOT_DTPREL16_HA:
4101 case R_PPC_GOT16:
4102 case R_PPC_GOT16_LO:
4103 case R_PPC_GOT16_HI:
4104 case R_PPC_GOT16_HA:
4105 if (h != NULL)
4106 {
4107 if (h->got.refcount > 0)
4108 h->got.refcount--;
4109 }
4110 else if (local_got_refcounts != NULL)
4111 {
4112 if (local_got_refcounts[r_symndx] > 0)
4113 local_got_refcounts[r_symndx]--;
4114 }
4115 break;
4116
4117 case R_PPC_REL24:
4118 case R_PPC_REL14:
4119 case R_PPC_REL14_BRTAKEN:
4120 case R_PPC_REL14_BRNTAKEN:
4121 case R_PPC_REL32:
4122 if (h == NULL
4123 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4124 break;
4125 /* Fall thru */
4126
4127 case R_PPC_ADDR32:
4128 case R_PPC_ADDR24:
4129 case R_PPC_ADDR16:
4130 case R_PPC_ADDR16_LO:
4131 case R_PPC_ADDR16_HI:
4132 case R_PPC_ADDR16_HA:
4133 case R_PPC_ADDR14:
4134 case R_PPC_ADDR14_BRTAKEN:
4135 case R_PPC_ADDR14_BRNTAKEN:
4136 case R_PPC_UADDR32:
4137 case R_PPC_UADDR16:
4138 case R_PPC_PLT32:
4139 case R_PPC_PLTREL24:
4140 case R_PPC_PLT16_LO:
4141 case R_PPC_PLT16_HI:
4142 case R_PPC_PLT16_HA:
4143 if (h != NULL)
4144 {
4145 if (h->plt.refcount > 0)
4146 h->plt.refcount--;
4147 }
4148 break;
4149
4150 default:
4151 break;
4152 }
4153 }
4154 return TRUE;
4155 }
4156
4157 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4158
4159 asection *
4160 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4161 {
4162 struct ppc_elf_link_hash_table *htab;
4163
4164 htab = ppc_elf_hash_table (info);
4165 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4166 FALSE, FALSE, TRUE);
4167
4168 return _bfd_elf_tls_setup (obfd, info);
4169 }
4170
4171 /* Run through all the TLS relocs looking for optimization
4172 opportunities. */
4173
4174 bfd_boolean
4175 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4176 struct bfd_link_info *info)
4177 {
4178 bfd *ibfd;
4179 asection *sec;
4180 struct ppc_elf_link_hash_table *htab;
4181
4182 if (info->relocatable || info->shared)
4183 return TRUE;
4184
4185 htab = ppc_elf_hash_table (info);
4186 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4187 {
4188 Elf_Internal_Sym *locsyms = NULL;
4189 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4190
4191 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4192 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4193 {
4194 Elf_Internal_Rela *relstart, *rel, *relend;
4195 int expecting_tls_get_addr;
4196
4197 /* Read the relocations. */
4198 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4199 info->keep_memory);
4200 if (relstart == NULL)
4201 return FALSE;
4202
4203 expecting_tls_get_addr = 0;
4204 relend = relstart + sec->reloc_count;
4205 for (rel = relstart; rel < relend; rel++)
4206 {
4207 enum elf_ppc_reloc_type r_type;
4208 unsigned long r_symndx;
4209 struct elf_link_hash_entry *h = NULL;
4210 char *tls_mask;
4211 char tls_set, tls_clear;
4212 bfd_boolean is_local;
4213
4214 r_symndx = ELF32_R_SYM (rel->r_info);
4215 if (r_symndx >= symtab_hdr->sh_info)
4216 {
4217 struct elf_link_hash_entry **sym_hashes;
4218
4219 sym_hashes = elf_sym_hashes (ibfd);
4220 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4221 while (h->root.type == bfd_link_hash_indirect
4222 || h->root.type == bfd_link_hash_warning)
4223 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4224 }
4225
4226 is_local = FALSE;
4227 if (h == NULL
4228 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
4229 is_local = TRUE;
4230
4231 r_type = ELF32_R_TYPE (rel->r_info);
4232 switch (r_type)
4233 {
4234 case R_PPC_GOT_TLSLD16:
4235 case R_PPC_GOT_TLSLD16_LO:
4236 case R_PPC_GOT_TLSLD16_HI:
4237 case R_PPC_GOT_TLSLD16_HA:
4238 /* These relocs should never be against a symbol
4239 defined in a shared lib. Leave them alone if
4240 that turns out to be the case. */
4241 expecting_tls_get_addr = 0;
4242 htab->tlsld_got.refcount -= 1;
4243 if (!is_local)
4244 continue;
4245
4246 /* LD -> LE */
4247 tls_set = 0;
4248 tls_clear = TLS_LD;
4249 expecting_tls_get_addr = 1;
4250 break;
4251
4252 case R_PPC_GOT_TLSGD16:
4253 case R_PPC_GOT_TLSGD16_LO:
4254 case R_PPC_GOT_TLSGD16_HI:
4255 case R_PPC_GOT_TLSGD16_HA:
4256 if (is_local)
4257 /* GD -> LE */
4258 tls_set = 0;
4259 else
4260 /* GD -> IE */
4261 tls_set = TLS_TLS | TLS_TPRELGD;
4262 tls_clear = TLS_GD;
4263 expecting_tls_get_addr = 1;
4264 break;
4265
4266 case R_PPC_GOT_TPREL16:
4267 case R_PPC_GOT_TPREL16_LO:
4268 case R_PPC_GOT_TPREL16_HI:
4269 case R_PPC_GOT_TPREL16_HA:
4270 expecting_tls_get_addr = 0;
4271 if (is_local)
4272 {
4273 /* IE -> LE */
4274 tls_set = 0;
4275 tls_clear = TLS_TPREL;
4276 break;
4277 }
4278 else
4279 continue;
4280
4281 case R_PPC_REL14:
4282 case R_PPC_REL14_BRTAKEN:
4283 case R_PPC_REL14_BRNTAKEN:
4284 case R_PPC_REL24:
4285 if (expecting_tls_get_addr
4286 && h != NULL
4287 && h == htab->tls_get_addr)
4288 {
4289 if (h->plt.refcount > 0)
4290 h->plt.refcount -= 1;
4291 }
4292 expecting_tls_get_addr = 0;
4293 continue;
4294
4295 default:
4296 expecting_tls_get_addr = 0;
4297 continue;
4298 }
4299
4300 if (h != NULL)
4301 {
4302 if (tls_set == 0)
4303 {
4304 /* We managed to get rid of a got entry. */
4305 if (h->got.refcount > 0)
4306 h->got.refcount -= 1;
4307 }
4308 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4309 }
4310 else
4311 {
4312 Elf_Internal_Sym *sym;
4313 bfd_signed_vma *lgot_refs;
4314 char *lgot_masks;
4315
4316 if (locsyms == NULL)
4317 {
4318 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4319 if (locsyms == NULL)
4320 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4321 symtab_hdr->sh_info,
4322 0, NULL, NULL, NULL);
4323 if (locsyms == NULL)
4324 {
4325 if (elf_section_data (sec)->relocs != relstart)
4326 free (relstart);
4327 return FALSE;
4328 }
4329 }
4330 sym = locsyms + r_symndx;
4331 lgot_refs = elf_local_got_refcounts (ibfd);
4332 if (lgot_refs == NULL)
4333 abort ();
4334 if (tls_set == 0)
4335 {
4336 /* We managed to get rid of a got entry. */
4337 if (lgot_refs[r_symndx] > 0)
4338 lgot_refs[r_symndx] -= 1;
4339 }
4340 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4341 tls_mask = &lgot_masks[r_symndx];
4342 }
4343
4344 *tls_mask |= tls_set;
4345 *tls_mask &= ~tls_clear;
4346 }
4347
4348 if (elf_section_data (sec)->relocs != relstart)
4349 free (relstart);
4350 }
4351
4352 if (locsyms != NULL
4353 && (symtab_hdr->contents != (unsigned char *) locsyms))
4354 {
4355 if (!info->keep_memory)
4356 free (locsyms);
4357 else
4358 symtab_hdr->contents = (unsigned char *) locsyms;
4359 }
4360 }
4361 return TRUE;
4362 }
4363 \f
4364 /* Hook called by the linker routine which adds symbols from an object
4365 file. We use it to put .comm items in .sbss, and not .bss. */
4366
4367 static bfd_boolean
4368 ppc_elf_add_symbol_hook (bfd *abfd,
4369 struct bfd_link_info *info,
4370 const Elf_Internal_Sym *sym,
4371 const char **namep ATTRIBUTE_UNUSED,
4372 flagword *flagsp ATTRIBUTE_UNUSED,
4373 asection **secp,
4374 bfd_vma *valp)
4375 {
4376 if (sym->st_shndx == SHN_COMMON
4377 && !info->relocatable
4378 && sym->st_size <= elf_gp_size (abfd)
4379 && (info->hash->creator == abfd->xvec
4380 || info->hash->creator == abfd->xvec->alternative_target))
4381 {
4382 /* Common symbols less than or equal to -G nn bytes are automatically
4383 put into .sbss. */
4384 struct ppc_elf_link_hash_table *htab;
4385
4386 htab = ppc_elf_hash_table (info);
4387 if (htab->sbss == NULL)
4388 {
4389 flagword flags = SEC_IS_COMMON;
4390
4391 htab->sbss = bfd_make_section_anyway (abfd, ".sbss");
4392 if (htab->sbss == NULL
4393 || ! bfd_set_section_flags (abfd, htab->sbss, flags))
4394 return FALSE;
4395 }
4396
4397 *secp = htab->sbss;
4398 *valp = sym->st_size;
4399 }
4400
4401 return TRUE;
4402 }
4403 \f
4404 /* Finish up dynamic symbol handling. We set the contents of various
4405 dynamic sections here. */
4406
4407 static bfd_boolean
4408 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
4409 struct bfd_link_info *info,
4410 struct elf_link_hash_entry *h,
4411 Elf_Internal_Sym *sym)
4412 {
4413 struct ppc_elf_link_hash_table *htab;
4414
4415 #ifdef DEBUG
4416 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
4417 h->root.root.string);
4418 #endif
4419
4420 htab = ppc_elf_hash_table (info);
4421 BFD_ASSERT (htab->elf.dynobj != NULL);
4422
4423 if (h->plt.offset != (bfd_vma) -1)
4424 {
4425 Elf_Internal_Rela rela;
4426 bfd_byte *loc;
4427 bfd_vma reloc_index;
4428
4429 #ifdef DEBUG
4430 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
4431 #endif
4432
4433 /* This symbol has an entry in the procedure linkage table. Set
4434 it up. */
4435
4436 BFD_ASSERT (h->dynindx != -1);
4437 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
4438
4439 /* We don't need to fill in the .plt. The ppc dynamic linker
4440 will fill it in. */
4441
4442 /* Fill in the entry in the .rela.plt section. */
4443 rela.r_offset = (htab->plt->output_section->vma
4444 + htab->plt->output_offset
4445 + h->plt.offset);
4446 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
4447 rela.r_addend = 0;
4448
4449 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
4450 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
4451 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
4452 loc = (htab->relplt->contents
4453 + reloc_index * sizeof (Elf32_External_Rela));
4454 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4455
4456 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4457 {
4458 /* Mark the symbol as undefined, rather than as defined in
4459 the .plt section. Leave the value alone. */
4460 sym->st_shndx = SHN_UNDEF;
4461 /* If the symbol is weak, we do need to clear the value.
4462 Otherwise, the PLT entry would provide a definition for
4463 the symbol even if the symbol wasn't defined anywhere,
4464 and so the symbol would never be NULL. */
4465 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
4466 == 0)
4467 sym->st_value = 0;
4468 }
4469 }
4470
4471 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4472 {
4473 asection *s;
4474 Elf_Internal_Rela rela;
4475 bfd_byte *loc;
4476
4477 /* This symbols needs a copy reloc. Set it up. */
4478
4479 #ifdef DEBUG
4480 fprintf (stderr, ", copy");
4481 #endif
4482
4483 BFD_ASSERT (h->dynindx != -1);
4484
4485 if (h->size <= elf_gp_size (htab->elf.dynobj))
4486 s = htab->relsbss;
4487 else
4488 s = htab->relbss;
4489 BFD_ASSERT (s != NULL);
4490
4491 rela.r_offset = (h->root.u.def.value
4492 + h->root.u.def.section->output_section->vma
4493 + h->root.u.def.section->output_offset);
4494 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
4495 rela.r_addend = 0;
4496 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4497 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4498 }
4499
4500 #ifdef DEBUG
4501 fprintf (stderr, "\n");
4502 #endif
4503
4504 /* Mark some specially defined symbols as absolute. */
4505 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4506 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
4507 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
4508 sym->st_shndx = SHN_ABS;
4509
4510 return TRUE;
4511 }
4512 \f
4513 /* Finish up the dynamic sections. */
4514
4515 static bfd_boolean
4516 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
4517 struct bfd_link_info *info)
4518 {
4519 asection *sdyn;
4520 struct ppc_elf_link_hash_table *htab;
4521
4522 #ifdef DEBUG
4523 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
4524 #endif
4525
4526 htab = ppc_elf_hash_table (info);
4527 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
4528
4529 if (htab->elf.dynamic_sections_created)
4530 {
4531 Elf32_External_Dyn *dyncon, *dynconend;
4532
4533 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
4534
4535 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4536 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4537 for (; dyncon < dynconend; dyncon++)
4538 {
4539 Elf_Internal_Dyn dyn;
4540 asection *s;
4541
4542 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
4543
4544 switch (dyn.d_tag)
4545 {
4546 case DT_PLTGOT:
4547 s = htab->plt;
4548 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4549 break;
4550
4551 case DT_PLTRELSZ:
4552 dyn.d_un.d_val = htab->relplt->_raw_size;
4553 break;
4554
4555 case DT_JMPREL:
4556 s = htab->relplt;
4557 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4558 break;
4559
4560 default:
4561 continue;
4562 }
4563
4564 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4565 }
4566 }
4567
4568 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
4569 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
4570 if (htab->got)
4571 {
4572 unsigned char *contents = htab->got->contents;
4573 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
4574
4575 if (sdyn == NULL)
4576 bfd_put_32 (output_bfd, 0, contents + 4);
4577 else
4578 bfd_put_32 (output_bfd,
4579 sdyn->output_section->vma + sdyn->output_offset,
4580 contents + 4);
4581
4582 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
4583 }
4584
4585 return TRUE;
4586 }
4587 \f
4588 /* The RELOCATE_SECTION function is called by the ELF backend linker
4589 to handle the relocations for a section.
4590
4591 The relocs are always passed as Rela structures; if the section
4592 actually uses Rel structures, the r_addend field will always be
4593 zero.
4594
4595 This function is responsible for adjust the section contents as
4596 necessary, and (if using Rela relocs and generating a
4597 relocatable output file) adjusting the reloc addend as
4598 necessary.
4599
4600 This function does not have to worry about setting the reloc
4601 address or the reloc symbol index.
4602
4603 LOCAL_SYMS is a pointer to the swapped in local symbols.
4604
4605 LOCAL_SECTIONS is an array giving the section in the input file
4606 corresponding to the st_shndx field of each local symbol.
4607
4608 The global hash table entry for the global symbols can be found
4609 via elf_sym_hashes (input_bfd).
4610
4611 When generating relocatable output, this function must handle
4612 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
4613 going to be the section symbol corresponding to the output
4614 section, which means that the addend must be adjusted
4615 accordingly. */
4616
4617 static bfd_boolean
4618 ppc_elf_relocate_section (bfd *output_bfd,
4619 struct bfd_link_info *info,
4620 bfd *input_bfd,
4621 asection *input_section,
4622 bfd_byte *contents,
4623 Elf_Internal_Rela *relocs,
4624 Elf_Internal_Sym *local_syms,
4625 asection **local_sections)
4626 {
4627 Elf_Internal_Shdr *symtab_hdr;
4628 struct elf_link_hash_entry **sym_hashes;
4629 struct ppc_elf_link_hash_table *htab;
4630 Elf_Internal_Rela *rel;
4631 Elf_Internal_Rela *relend;
4632 Elf_Internal_Rela outrel;
4633 bfd_byte *loc;
4634 asection *sreloc = NULL;
4635 bfd_vma *local_got_offsets;
4636 bfd_boolean ret = TRUE;
4637
4638 #ifdef DEBUG
4639 fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, "
4640 "%ld relocations%s\n",
4641 bfd_archive_filename (input_bfd),
4642 bfd_section_name(input_bfd, input_section),
4643 (long) input_section->reloc_count,
4644 (info->relocatable) ? " (relocatable)" : "");
4645 #endif
4646
4647 if (info->relocatable)
4648 return TRUE;
4649
4650 /* Initialize howto table if not already done. */
4651 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4652 ppc_elf_howto_init ();
4653
4654 htab = ppc_elf_hash_table (info);
4655 local_got_offsets = elf_local_got_offsets (input_bfd);
4656 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4657 sym_hashes = elf_sym_hashes (input_bfd);
4658 rel = relocs;
4659 relend = relocs + input_section->reloc_count;
4660 for (; rel < relend; rel++)
4661 {
4662 enum elf_ppc_reloc_type r_type;
4663 bfd_vma addend;
4664 bfd_reloc_status_type r;
4665 Elf_Internal_Sym *sym;
4666 asection *sec;
4667 struct elf_link_hash_entry *h;
4668 const char *sym_name;
4669 reloc_howto_type *howto;
4670 unsigned long r_symndx;
4671 bfd_vma relocation;
4672 bfd_vma branch_bit, insn, from;
4673 bfd_boolean unresolved_reloc;
4674 bfd_boolean warned;
4675 unsigned int tls_type, tls_mask, tls_gd;
4676
4677 r_type = ELF32_R_TYPE (rel->r_info);
4678 sym = NULL;
4679 sec = NULL;
4680 h = NULL;
4681 unresolved_reloc = FALSE;
4682 warned = FALSE;
4683 r_symndx = ELF32_R_SYM (rel->r_info);
4684
4685 if (r_symndx < symtab_hdr->sh_info)
4686 {
4687 sym = local_syms + r_symndx;
4688 sec = local_sections[r_symndx];
4689 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
4690
4691 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4692 }
4693 else
4694 {
4695 RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
4696 symtab_hdr, relocation, sec,
4697 unresolved_reloc, info,
4698 warned);
4699
4700 sym_name = h->root.root.string;
4701 }
4702
4703 /* TLS optimizations. Replace instruction sequences and relocs
4704 based on information we collected in tls_optimize. We edit
4705 RELOCS so that --emit-relocs will output something sensible
4706 for the final instruction stream. */
4707 tls_mask = 0;
4708 tls_gd = 0;
4709 if (IS_PPC_TLS_RELOC (r_type))
4710 {
4711 if (h != NULL)
4712 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
4713 else if (local_got_offsets != NULL)
4714 {
4715 char *lgot_masks;
4716 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
4717 tls_mask = lgot_masks[r_symndx];
4718 }
4719 }
4720
4721 /* Ensure reloc mapping code below stays sane. */
4722 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
4723 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
4724 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
4725 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
4726 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
4727 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
4728 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
4729 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
4730 abort ();
4731 switch (r_type)
4732 {
4733 default:
4734 break;
4735
4736 case R_PPC_GOT_TPREL16:
4737 case R_PPC_GOT_TPREL16_LO:
4738 if (tls_mask != 0
4739 && (tls_mask & TLS_TPREL) == 0)
4740 {
4741 bfd_vma insn;
4742 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
4743 insn &= 31 << 21;
4744 insn |= 0x3c020000; /* addis 0,2,0 */
4745 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
4746 r_type = R_PPC_TPREL16_HA;
4747 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4748 }
4749 break;
4750
4751 case R_PPC_TLS:
4752 if (tls_mask != 0
4753 && (tls_mask & TLS_TPREL) == 0)
4754 {
4755 bfd_vma insn, rtra;
4756 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4757 if ((insn & ((31 << 26) | (31 << 11)))
4758 == ((31 << 26) | (2 << 11)))
4759 rtra = insn & ((1 << 26) - (1 << 16));
4760 else if ((insn & ((31 << 26) | (31 << 16)))
4761 == ((31 << 26) | (2 << 16)))
4762 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
4763 else
4764 abort ();
4765 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
4766 /* add -> addi. */
4767 insn = 14 << 26;
4768 else if ((insn & (31 << 1)) == 23 << 1
4769 && ((insn & (31 << 6)) < 14 << 6
4770 || ((insn & (31 << 6)) >= 16 << 6
4771 && (insn & (31 << 6)) < 24 << 6)))
4772 /* load and store indexed -> dform. */
4773 insn = (32 | ((insn >> 6) & 31)) << 26;
4774 else if ((insn & (31 << 1)) == 21 << 1
4775 && (insn & (0x1a << 6)) == 0)
4776 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
4777 insn = (((58 | ((insn >> 6) & 4)) << 26)
4778 | ((insn >> 6) & 1));
4779 else if ((insn & (31 << 1)) == 21 << 1
4780 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
4781 /* lwax -> lwa. */
4782 insn = (58 << 26) | 2;
4783 else
4784 abort ();
4785 insn |= rtra;
4786 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4787 r_type = R_PPC_TPREL16_LO;
4788 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4789 /* Was PPC_TLS which sits on insn boundary, now
4790 PPC_TPREL16_LO which is at insn+2. */
4791 rel->r_offset += 2;
4792 }
4793 break;
4794
4795 case R_PPC_GOT_TLSGD16_HI:
4796 case R_PPC_GOT_TLSGD16_HA:
4797 tls_gd = TLS_TPRELGD;
4798 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4799 goto tls_gdld_hi;
4800 break;
4801
4802 case R_PPC_GOT_TLSLD16_HI:
4803 case R_PPC_GOT_TLSLD16_HA:
4804 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4805 {
4806 tls_gdld_hi:
4807 if ((tls_mask & tls_gd) != 0)
4808 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4809 + R_PPC_GOT_TPREL16);
4810 else
4811 {
4812 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
4813 rel->r_offset -= 2;
4814 r_type = R_PPC_NONE;
4815 }
4816 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4817 }
4818 break;
4819
4820 case R_PPC_GOT_TLSGD16:
4821 case R_PPC_GOT_TLSGD16_LO:
4822 tls_gd = TLS_TPRELGD;
4823 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4824 goto tls_get_addr_check;
4825 break;
4826
4827 case R_PPC_GOT_TLSLD16:
4828 case R_PPC_GOT_TLSLD16_LO:
4829 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4830 {
4831 tls_get_addr_check:
4832 if (rel + 1 < relend)
4833 {
4834 enum elf_ppc_reloc_type r_type2;
4835 unsigned long r_symndx2;
4836 struct elf_link_hash_entry *h2;
4837 bfd_vma insn1, insn2;
4838 bfd_vma offset;
4839
4840 /* The next instruction should be a call to
4841 __tls_get_addr. Peek at the reloc to be sure. */
4842 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4843 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4844 if (r_symndx2 < symtab_hdr->sh_info
4845 || (r_type2 != R_PPC_REL14
4846 && r_type2 != R_PPC_REL14_BRTAKEN
4847 && r_type2 != R_PPC_REL14_BRNTAKEN
4848 && r_type2 != R_PPC_REL24
4849 && r_type2 != R_PPC_PLTREL24))
4850 break;
4851
4852 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4853 while (h2->root.type == bfd_link_hash_indirect
4854 || h2->root.type == bfd_link_hash_warning)
4855 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
4856 if (h2 == NULL || h2 != htab->tls_get_addr)
4857 break;
4858
4859 /* OK, it checks out. Replace the call. */
4860 offset = rel[1].r_offset;
4861 insn1 = bfd_get_32 (output_bfd,
4862 contents + rel->r_offset - 2);
4863 if ((tls_mask & tls_gd) != 0)
4864 {
4865 /* IE */
4866 insn1 &= (1 << 26) - 1;
4867 insn1 |= 32 << 26; /* lwz */
4868 insn2 = 0x7c631214; /* add 3,3,2 */
4869 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
4870 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4871 + R_PPC_GOT_TPREL16);
4872 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4873 }
4874 else
4875 {
4876 /* LE */
4877 insn1 = 0x3c620000; /* addis 3,2,0 */
4878 insn2 = 0x38630000; /* addi 3,3,0 */
4879 if (tls_gd == 0)
4880 {
4881 /* Was an LD reloc. */
4882 r_symndx = 0;
4883 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4884 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4885 }
4886 r_type = R_PPC_TPREL16_HA;
4887 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4888 rel[1].r_info = ELF32_R_INFO (r_symndx,
4889 R_PPC_TPREL16_LO);
4890 rel[1].r_offset += 2;
4891 }
4892 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
4893 bfd_put_32 (output_bfd, insn2, contents + offset);
4894 if (tls_gd == 0)
4895 {
4896 /* We changed the symbol on an LD reloc. Start over
4897 in order to get h, sym, sec etc. right. */
4898 rel--;
4899 continue;
4900 }
4901 }
4902 }
4903 break;
4904 }
4905
4906 /* Handle other relocations that tweak non-addend part of insn. */
4907 branch_bit = 0;
4908 switch (r_type)
4909 {
4910 default:
4911 break;
4912
4913 /* Branch taken prediction relocations. */
4914 case R_PPC_ADDR14_BRTAKEN:
4915 case R_PPC_REL14_BRTAKEN:
4916 branch_bit = BRANCH_PREDICT_BIT;
4917 /* Fall thru */
4918
4919 /* Branch not taken prediction relocations. */
4920 case R_PPC_ADDR14_BRNTAKEN:
4921 case R_PPC_REL14_BRNTAKEN:
4922 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4923 insn &= ~BRANCH_PREDICT_BIT;
4924 insn |= branch_bit;
4925
4926 from = (rel->r_offset
4927 + input_section->output_offset
4928 + input_section->output_section->vma);
4929
4930 /* Invert 'y' bit if not the default. */
4931 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
4932 insn ^= BRANCH_PREDICT_BIT;
4933
4934 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4935 break;
4936 }
4937
4938 addend = rel->r_addend;
4939 tls_type = 0;
4940 howto = NULL;
4941 if (r_type < R_PPC_max)
4942 howto = ppc_elf_howto_table[r_type];
4943 switch (r_type)
4944 {
4945 default:
4946 (*_bfd_error_handler)
4947 (_("%s: unknown relocation type %d for symbol %s"),
4948 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
4949
4950 bfd_set_error (bfd_error_bad_value);
4951 ret = FALSE;
4952 continue;
4953
4954 case R_PPC_NONE:
4955 case R_PPC_TLS:
4956 case R_PPC_EMB_MRKREF:
4957 case R_PPC_GNU_VTINHERIT:
4958 case R_PPC_GNU_VTENTRY:
4959 continue;
4960
4961 /* GOT16 relocations. Like an ADDR16 using the symbol's
4962 address in the GOT as relocation value instead of the
4963 symbol's value itself. Also, create a GOT entry for the
4964 symbol and put the symbol value there. */
4965 case R_PPC_GOT_TLSGD16:
4966 case R_PPC_GOT_TLSGD16_LO:
4967 case R_PPC_GOT_TLSGD16_HI:
4968 case R_PPC_GOT_TLSGD16_HA:
4969 tls_type = TLS_TLS | TLS_GD;
4970 goto dogot;
4971
4972 case R_PPC_GOT_TLSLD16:
4973 case R_PPC_GOT_TLSLD16_LO:
4974 case R_PPC_GOT_TLSLD16_HI:
4975 case R_PPC_GOT_TLSLD16_HA:
4976 tls_type = TLS_TLS | TLS_LD;
4977 goto dogot;
4978
4979 case R_PPC_GOT_TPREL16:
4980 case R_PPC_GOT_TPREL16_LO:
4981 case R_PPC_GOT_TPREL16_HI:
4982 case R_PPC_GOT_TPREL16_HA:
4983 tls_type = TLS_TLS | TLS_TPREL;
4984 goto dogot;
4985
4986 case R_PPC_GOT_DTPREL16:
4987 case R_PPC_GOT_DTPREL16_LO:
4988 case R_PPC_GOT_DTPREL16_HI:
4989 case R_PPC_GOT_DTPREL16_HA:
4990 tls_type = TLS_TLS | TLS_DTPREL;
4991 goto dogot;
4992
4993 case R_PPC_GOT16:
4994 case R_PPC_GOT16_LO:
4995 case R_PPC_GOT16_HI:
4996 case R_PPC_GOT16_HA:
4997 dogot:
4998 {
4999 /* Relocation is to the entry for this symbol in the global
5000 offset table. */
5001 bfd_vma off;
5002 bfd_vma *offp;
5003 unsigned long indx;
5004
5005 if (htab->got == NULL)
5006 abort ();
5007
5008 indx = 0;
5009 if (tls_type == (TLS_TLS | TLS_LD)
5010 && (h == NULL
5011 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
5012 offp = &htab->tlsld_got.offset;
5013 else if (h != NULL)
5014 {
5015 bfd_boolean dyn;
5016 dyn = htab->elf.dynamic_sections_created;
5017 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5018 || (info->shared
5019 && SYMBOL_REFERENCES_LOCAL (info, h)))
5020 /* This is actually a static link, or it is a
5021 -Bsymbolic link and the symbol is defined
5022 locally, or the symbol was forced to be local
5023 because of a version file. */
5024 ;
5025 else
5026 {
5027 indx = h->dynindx;
5028 unresolved_reloc = FALSE;
5029 }
5030 offp = &h->got.offset;
5031 }
5032 else
5033 {
5034 if (local_got_offsets == NULL)
5035 abort ();
5036 offp = &local_got_offsets[r_symndx];
5037 }
5038
5039 /* The offset must always be a multiple of 4. We use the
5040 least significant bit to record whether we have already
5041 processed this entry. */
5042 off = *offp;
5043 if ((off & 1) != 0)
5044 off &= ~1;
5045 else
5046 {
5047 unsigned int tls_m = (tls_mask
5048 & (TLS_LD | TLS_GD | TLS_DTPREL
5049 | TLS_TPREL | TLS_TPRELGD));
5050
5051 if (offp == &htab->tlsld_got.offset)
5052 tls_m = TLS_LD;
5053 else if (h == NULL
5054 || !(h->elf_link_hash_flags
5055 & ELF_LINK_HASH_DEF_DYNAMIC))
5056 tls_m &= ~TLS_LD;
5057
5058 /* We might have multiple got entries for this sym.
5059 Initialize them all. */
5060 do
5061 {
5062 int tls_ty = 0;
5063
5064 if ((tls_m & TLS_LD) != 0)
5065 {
5066 tls_ty = TLS_TLS | TLS_LD;
5067 tls_m &= ~TLS_LD;
5068 }
5069 else if ((tls_m & TLS_GD) != 0)
5070 {
5071 tls_ty = TLS_TLS | TLS_GD;
5072 tls_m &= ~TLS_GD;
5073 }
5074 else if ((tls_m & TLS_DTPREL) != 0)
5075 {
5076 tls_ty = TLS_TLS | TLS_DTPREL;
5077 tls_m &= ~TLS_DTPREL;
5078 }
5079 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5080 {
5081 tls_ty = TLS_TLS | TLS_TPREL;
5082 tls_m = 0;
5083 }
5084
5085 /* Generate relocs for the dynamic linker. */
5086 if ((info->shared || indx != 0)
5087 && (h == NULL
5088 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5089 || h->root.type != bfd_link_hash_undefweak))
5090 {
5091 outrel.r_offset = (htab->got->output_section->vma
5092 + htab->got->output_offset
5093 + off);
5094 outrel.r_addend = 0;
5095 if (tls_ty & (TLS_LD | TLS_GD))
5096 {
5097 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5098 if (tls_ty == (TLS_TLS | TLS_GD))
5099 {
5100 loc = htab->relgot->contents;
5101 loc += (htab->relgot->reloc_count++
5102 * sizeof (Elf32_External_Rela));
5103 bfd_elf32_swap_reloca_out (output_bfd,
5104 &outrel, loc);
5105 outrel.r_offset += 4;
5106 outrel.r_info
5107 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5108 }
5109 }
5110 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5111 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5112 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5113 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5114 else if (indx == 0)
5115 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5116 else
5117 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5118 if (indx == 0)
5119 {
5120 outrel.r_addend += relocation;
5121 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5122 outrel.r_addend -= htab->elf.tls_sec->vma;
5123 }
5124 loc = htab->relgot->contents;
5125 loc += (htab->relgot->reloc_count++
5126 * sizeof (Elf32_External_Rela));
5127 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5128 }
5129
5130 /* Init the .got section contents if we're not
5131 emitting a reloc. */
5132 else
5133 {
5134 bfd_vma value = relocation;
5135
5136 if (tls_ty == (TLS_TLS | TLS_LD))
5137 value = 1;
5138 else if (tls_ty != 0)
5139 {
5140 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
5141 if (tls_ty == (TLS_TLS | TLS_TPREL))
5142 value += DTP_OFFSET - TP_OFFSET;
5143
5144 if (tls_ty == (TLS_TLS | TLS_GD))
5145 {
5146 bfd_put_32 (output_bfd, value,
5147 htab->got->contents + off + 4);
5148 value = 1;
5149 }
5150 }
5151 bfd_put_32 (output_bfd, value,
5152 htab->got->contents + off);
5153 }
5154
5155 off += 4;
5156 if (tls_ty & (TLS_LD | TLS_GD))
5157 off += 4;
5158 }
5159 while (tls_m != 0);
5160
5161 off = *offp;
5162 *offp = off | 1;
5163 }
5164
5165 if (off >= (bfd_vma) -2)
5166 abort ();
5167
5168 if ((tls_type & TLS_TLS) != 0)
5169 {
5170 if (tls_type != (TLS_TLS | TLS_LD))
5171 {
5172 if ((tls_mask & TLS_LD) != 0
5173 && !(h == NULL
5174 || !(h->elf_link_hash_flags
5175 & ELF_LINK_HASH_DEF_DYNAMIC)))
5176 off += 8;
5177 if (tls_type != (TLS_TLS | TLS_GD))
5178 {
5179 if ((tls_mask & TLS_GD) != 0)
5180 off += 8;
5181 if (tls_type != (TLS_TLS | TLS_DTPREL))
5182 {
5183 if ((tls_mask & TLS_DTPREL) != 0)
5184 off += 4;
5185 }
5186 }
5187 }
5188 }
5189
5190 relocation = htab->got->output_offset + off - 4;
5191
5192 /* Addends on got relocations don't make much sense.
5193 x+off@got is actually x@got+off, and since the got is
5194 generated by a hash table traversal, the value in the
5195 got at entry m+n bears little relation to the entry m. */
5196 if (addend != 0)
5197 (*_bfd_error_handler)
5198 (_("%s(%s+0x%lx): non-zero addend on %s reloc against `%s'"),
5199 bfd_archive_filename (input_bfd),
5200 bfd_get_section_name (input_bfd, input_section),
5201 (long) rel->r_offset,
5202 howto->name,
5203 sym_name);
5204 }
5205 break;
5206
5207 /* Relocations that need no special processing. */
5208 case R_PPC_LOCAL24PC:
5209 /* It makes no sense to point a local relocation
5210 at a symbol not in this object. */
5211 if (unresolved_reloc)
5212 {
5213 if (! (*info->callbacks->undefined_symbol) (info,
5214 h->root.root.string,
5215 input_bfd,
5216 input_section,
5217 rel->r_offset,
5218 TRUE))
5219 return FALSE;
5220 continue;
5221 }
5222 break;
5223
5224 case R_PPC_DTPREL16:
5225 case R_PPC_DTPREL16_LO:
5226 case R_PPC_DTPREL16_HI:
5227 case R_PPC_DTPREL16_HA:
5228 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5229 break;
5230
5231 /* Relocations that may need to be propagated if this is a shared
5232 object. */
5233 case R_PPC_TPREL16:
5234 case R_PPC_TPREL16_LO:
5235 case R_PPC_TPREL16_HI:
5236 case R_PPC_TPREL16_HA:
5237 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5238 /* The TPREL16 relocs shouldn't really be used in shared
5239 libs as they will result in DT_TEXTREL being set, but
5240 support them anyway. */
5241 goto dodyn;
5242
5243 case R_PPC_TPREL32:
5244 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5245 goto dodyn;
5246
5247 case R_PPC_DTPREL32:
5248 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5249 goto dodyn;
5250
5251 case R_PPC_DTPMOD32:
5252 relocation = 1;
5253 addend = 0;
5254 goto dodyn;
5255
5256 case R_PPC_REL24:
5257 case R_PPC_REL32:
5258 case R_PPC_REL14:
5259 case R_PPC_REL14_BRTAKEN:
5260 case R_PPC_REL14_BRNTAKEN:
5261 /* If these relocations are not to a named symbol, they can be
5262 handled right here, no need to bother the dynamic linker. */
5263 if (SYMBOL_REFERENCES_LOCAL (info, h)
5264 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5265 break;
5266 /* fall through */
5267
5268 /* Relocations that always need to be propagated if this is a shared
5269 object. */
5270 case R_PPC_ADDR32:
5271 case R_PPC_ADDR24:
5272 case R_PPC_ADDR16:
5273 case R_PPC_ADDR16_LO:
5274 case R_PPC_ADDR16_HI:
5275 case R_PPC_ADDR16_HA:
5276 case R_PPC_ADDR14:
5277 case R_PPC_ADDR14_BRTAKEN:
5278 case R_PPC_ADDR14_BRNTAKEN:
5279 case R_PPC_UADDR32:
5280 case R_PPC_UADDR16:
5281 /* r_symndx will be zero only for relocs against symbols
5282 from removed linkonce sections, or sections discarded by
5283 a linker script. */
5284 dodyn:
5285 if (r_symndx == 0)
5286 break;
5287 /* Fall thru. */
5288
5289 if ((info->shared
5290 && (h == NULL
5291 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5292 || h->root.type != bfd_link_hash_undefweak)
5293 && (MUST_BE_DYN_RELOC (r_type)
5294 || !SYMBOL_CALLS_LOCAL (info, h)))
5295 || (ELIMINATE_COPY_RELOCS
5296 && !info->shared
5297 && (input_section->flags & SEC_ALLOC) != 0
5298 && h != NULL
5299 && h->dynindx != -1
5300 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5301 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5302 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
5303 {
5304 int skip;
5305
5306 #ifdef DEBUG
5307 fprintf (stderr, "ppc_elf_relocate_section needs to "
5308 "create relocation for %s\n",
5309 (h && h->root.root.string
5310 ? h->root.root.string : "<unknown>"));
5311 #endif
5312
5313 /* When generating a shared object, these relocations
5314 are copied into the output file to be resolved at run
5315 time. */
5316 if (sreloc == NULL)
5317 {
5318 const char *name;
5319
5320 name = (bfd_elf_string_from_elf_section
5321 (input_bfd,
5322 elf_elfheader (input_bfd)->e_shstrndx,
5323 elf_section_data (input_section)->rel_hdr.sh_name));
5324 if (name == NULL)
5325 return FALSE;
5326
5327 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
5328 && strcmp (bfd_get_section_name (input_bfd,
5329 input_section),
5330 name + 5) == 0);
5331
5332 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
5333 BFD_ASSERT (sreloc != NULL);
5334 }
5335
5336 skip = 0;
5337
5338 outrel.r_offset =
5339 _bfd_elf_section_offset (output_bfd, info, input_section,
5340 rel->r_offset);
5341 if (outrel.r_offset == (bfd_vma) -1
5342 || outrel.r_offset == (bfd_vma) -2)
5343 skip = (int) outrel.r_offset;
5344 outrel.r_offset += (input_section->output_section->vma
5345 + input_section->output_offset);
5346
5347 if (skip)
5348 memset (&outrel, 0, sizeof outrel);
5349 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
5350 {
5351 unresolved_reloc = FALSE;
5352 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5353 outrel.r_addend = rel->r_addend;
5354 }
5355 else
5356 {
5357 outrel.r_addend = relocation + rel->r_addend;
5358
5359 if (r_type == R_PPC_ADDR32)
5360 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
5361 else
5362 {
5363 long indx;
5364
5365 if (bfd_is_abs_section (sec))
5366 indx = 0;
5367 else if (sec == NULL || sec->owner == NULL)
5368 {
5369 bfd_set_error (bfd_error_bad_value);
5370 return FALSE;
5371 }
5372 else
5373 {
5374 asection *osec;
5375
5376 /* We are turning this relocation into one
5377 against a section symbol. It would be
5378 proper to subtract the symbol's value,
5379 osec->vma, from the emitted reloc addend,
5380 but ld.so expects buggy relocs. */
5381 osec = sec->output_section;
5382 indx = elf_section_data (osec)->dynindx;
5383 BFD_ASSERT (indx > 0);
5384 #ifdef DEBUG
5385 if (indx <= 0)
5386 printf ("indx=%d section=%s flags=%08x name=%s\n",
5387 indx, osec->name, osec->flags,
5388 h->root.root.string);
5389 #endif
5390 }
5391
5392 outrel.r_info = ELF32_R_INFO (indx, r_type);
5393 }
5394 }
5395
5396 loc = sreloc->contents;
5397 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5398 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5399
5400 if (skip == -1)
5401 continue;
5402
5403 /* This reloc will be computed at runtime. We clear the memory
5404 so that it contains predictable value. */
5405 if (! skip
5406 && ((input_section->flags & SEC_ALLOC) != 0
5407 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
5408 {
5409 relocation = howto->pc_relative ? outrel.r_offset : 0;
5410 addend = 0;
5411 break;
5412 }
5413 }
5414 break;
5415
5416 case R_PPC_RELAX32PC:
5417 relocation -= (input_section->output_section->vma
5418 + input_section->output_offset
5419 + rel->r_offset - 4);
5420 /* Fall thru */
5421 case R_PPC_RELAX32:
5422 {
5423 unsigned long t0;
5424 unsigned long t1;
5425
5426 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
5427 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
5428
5429 /* We're clearing the bits for R_PPC_ADDR16_HA
5430 and R_PPC_ADDR16_LO here. */
5431 t0 &= ~0xffff;
5432 t1 &= ~0xffff;
5433
5434 /* t0 is HA, t1 is LO */
5435 relocation += addend;
5436 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
5437 t1 |= relocation & 0xffff;
5438
5439 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
5440 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
5441 }
5442 continue;
5443
5444 /* Indirect .sdata relocation. */
5445 case R_PPC_EMB_SDAI16:
5446 BFD_ASSERT (htab->sdata != NULL);
5447 relocation
5448 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5449 htab->sdata, h, relocation,
5450 rel, R_PPC_RELATIVE);
5451 break;
5452
5453 /* Indirect .sdata2 relocation. */
5454 case R_PPC_EMB_SDA2I16:
5455 BFD_ASSERT (htab->sdata2 != NULL);
5456 relocation
5457 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5458 htab->sdata2, h, relocation,
5459 rel, R_PPC_RELATIVE);
5460 break;
5461
5462 /* Handle the TOC16 reloc. We want to use the offset within the .got
5463 section, not the actual VMA. This is appropriate when generating
5464 an embedded ELF object, for which the .got section acts like the
5465 AIX .toc section. */
5466 case R_PPC_TOC16: /* phony GOT16 relocations */
5467 BFD_ASSERT (sec != NULL);
5468 BFD_ASSERT (bfd_is_und_section (sec)
5469 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
5470 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)
5471
5472 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
5473 break;
5474
5475 case R_PPC_PLTREL24:
5476 /* Relocation is to the entry for this symbol in the
5477 procedure linkage table. */
5478 BFD_ASSERT (h != NULL);
5479
5480 if (h->plt.offset == (bfd_vma) -1
5481 || htab->plt == NULL)
5482 {
5483 /* We didn't make a PLT entry for this symbol. This
5484 happens when statically linking PIC code, or when
5485 using -Bsymbolic. */
5486 break;
5487 }
5488
5489 unresolved_reloc = FALSE;
5490 relocation = (htab->plt->output_section->vma
5491 + htab->plt->output_offset
5492 + h->plt.offset);
5493 break;
5494
5495 /* Relocate against _SDA_BASE_. */
5496 case R_PPC_SDAREL16:
5497 {
5498 const char *name;
5499 const struct elf_link_hash_entry *sh;
5500
5501 BFD_ASSERT (sec != NULL);
5502 name = bfd_get_section_name (abfd, sec->output_section);
5503 if (! ((strncmp (name, ".sdata", 6) == 0
5504 && (name[6] == 0 || name[6] == '.'))
5505 || (strncmp (name, ".sbss", 5) == 0
5506 && (name[5] == 0 || name[5] == '.'))))
5507 {
5508 (*_bfd_error_handler)
5509 (_("%s: the target (%s) of a %s relocation is "
5510 "in the wrong output section (%s)"),
5511 bfd_archive_filename (input_bfd),
5512 sym_name,
5513 howto->name,
5514 name);
5515 }
5516 sh = htab->sdata->sym_hash;
5517 addend -= (sh->root.u.def.value
5518 + sh->root.u.def.section->output_section->vma
5519 + sh->root.u.def.section->output_offset);
5520 }
5521 break;
5522
5523 /* Relocate against _SDA2_BASE_. */
5524 case R_PPC_EMB_SDA2REL:
5525 {
5526 const char *name;
5527 const struct elf_link_hash_entry *sh;
5528
5529 BFD_ASSERT (sec != NULL);
5530 name = bfd_get_section_name (abfd, sec->output_section);
5531 if (! (strncmp (name, ".sdata2", 7) == 0
5532 || strncmp (name, ".sbss2", 6) == 0))
5533 {
5534 (*_bfd_error_handler)
5535 (_("%s: the target (%s) of a %s relocation is "
5536 "in the wrong output section (%s)"),
5537 bfd_archive_filename (input_bfd),
5538 sym_name,
5539 howto->name,
5540 name);
5541
5542 bfd_set_error (bfd_error_bad_value);
5543 ret = FALSE;
5544 continue;
5545 }
5546 sh = htab->sdata2->sym_hash;
5547 addend -= (sh->root.u.def.value
5548 + sh->root.u.def.section->output_section->vma
5549 + sh->root.u.def.section->output_offset);
5550 }
5551 break;
5552
5553 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
5554 case R_PPC_EMB_SDA21:
5555 case R_PPC_EMB_RELSDA:
5556 {
5557 const char *name;
5558 const struct elf_link_hash_entry *sh;
5559 int reg;
5560
5561 BFD_ASSERT (sec != NULL);
5562 name = bfd_get_section_name (abfd, sec->output_section);
5563 if (((strncmp (name, ".sdata", 6) == 0
5564 && (name[6] == 0 || name[6] == '.'))
5565 || (strncmp (name, ".sbss", 5) == 0
5566 && (name[5] == 0 || name[5] == '.'))))
5567 {
5568 reg = 13;
5569 sh = htab->sdata->sym_hash;
5570 addend -= (sh->root.u.def.value
5571 + sh->root.u.def.section->output_section->vma
5572 + sh->root.u.def.section->output_offset);
5573 }
5574
5575 else if (strncmp (name, ".sdata2", 7) == 0
5576 || strncmp (name, ".sbss2", 6) == 0)
5577 {
5578 reg = 2;
5579 sh = htab->sdata2->sym_hash;
5580 addend -= (sh->root.u.def.value
5581 + sh->root.u.def.section->output_section->vma
5582 + sh->root.u.def.section->output_offset);
5583 }
5584
5585 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
5586 || strcmp (name, ".PPC.EMB.sbss0") == 0)
5587 {
5588 reg = 0;
5589 }
5590
5591 else
5592 {
5593 (*_bfd_error_handler)
5594 (_("%s: the target (%s) of a %s relocation is "
5595 "in the wrong output section (%s)"),
5596 bfd_archive_filename (input_bfd),
5597 sym_name,
5598 howto->name,
5599 name);
5600
5601 bfd_set_error (bfd_error_bad_value);
5602 ret = FALSE;
5603 continue;
5604 }
5605
5606 if (r_type == R_PPC_EMB_SDA21)
5607 { /* fill in register field */
5608 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5609 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
5610 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5611 }
5612 }
5613 break;
5614
5615 /* Relocate against the beginning of the section. */
5616 case R_PPC_SECTOFF:
5617 case R_PPC_SECTOFF_LO:
5618 case R_PPC_SECTOFF_HI:
5619 case R_PPC_SECTOFF_HA:
5620 BFD_ASSERT (sec != NULL);
5621 addend -= sec->output_section->vma;
5622 break;
5623
5624 /* Negative relocations. */
5625 case R_PPC_EMB_NADDR32:
5626 case R_PPC_EMB_NADDR16:
5627 case R_PPC_EMB_NADDR16_LO:
5628 case R_PPC_EMB_NADDR16_HI:
5629 case R_PPC_EMB_NADDR16_HA:
5630 addend -= 2 * relocation;
5631 break;
5632
5633 case R_PPC_COPY:
5634 case R_PPC_GLOB_DAT:
5635 case R_PPC_JMP_SLOT:
5636 case R_PPC_RELATIVE:
5637 case R_PPC_PLT32:
5638 case R_PPC_PLTREL32:
5639 case R_PPC_PLT16_LO:
5640 case R_PPC_PLT16_HI:
5641 case R_PPC_PLT16_HA:
5642 case R_PPC_ADDR30:
5643 case R_PPC_EMB_RELSEC16:
5644 case R_PPC_EMB_RELST_LO:
5645 case R_PPC_EMB_RELST_HI:
5646 case R_PPC_EMB_RELST_HA:
5647 case R_PPC_EMB_BIT_FLD:
5648 (*_bfd_error_handler)
5649 (_("%s: relocation %s is not yet supported for symbol %s."),
5650 bfd_archive_filename (input_bfd),
5651 howto->name,
5652 sym_name);
5653
5654 bfd_set_error (bfd_error_invalid_operation);
5655 ret = FALSE;
5656 continue;
5657 }
5658
5659 /* Do any further special processing. */
5660 switch (r_type)
5661 {
5662 default:
5663 break;
5664
5665 case R_PPC_ADDR16_HA:
5666 case R_PPC_GOT16_HA:
5667 case R_PPC_PLT16_HA:
5668 case R_PPC_SECTOFF_HA:
5669 case R_PPC_TPREL16_HA:
5670 case R_PPC_DTPREL16_HA:
5671 case R_PPC_GOT_TLSGD16_HA:
5672 case R_PPC_GOT_TLSLD16_HA:
5673 case R_PPC_GOT_TPREL16_HA:
5674 case R_PPC_GOT_DTPREL16_HA:
5675 case R_PPC_EMB_NADDR16_HA:
5676 case R_PPC_EMB_RELST_HA:
5677 /* It's just possible that this symbol is a weak symbol
5678 that's not actually defined anywhere. In that case,
5679 'sec' would be NULL, and we should leave the symbol
5680 alone (it will be set to zero elsewhere in the link). */
5681 if (sec != NULL)
5682 /* Add 0x10000 if sign bit in 0:15 is set.
5683 Bits 0:15 are not used. */
5684 addend += 0x8000;
5685 break;
5686 }
5687
5688 #ifdef DEBUG
5689 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
5690 "offset = %ld, addend = %ld\n",
5691 howto->name,
5692 (int) r_type,
5693 sym_name,
5694 r_symndx,
5695 (long) rel->r_offset,
5696 (long) addend);
5697 #endif
5698
5699 if (unresolved_reloc
5700 && !((input_section->flags & SEC_DEBUGGING) != 0
5701 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
5702 {
5703 (*_bfd_error_handler)
5704 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
5705 bfd_archive_filename (input_bfd),
5706 bfd_get_section_name (input_bfd, input_section),
5707 (long) rel->r_offset,
5708 howto->name,
5709 sym_name);
5710 ret = FALSE;
5711 }
5712
5713 r = _bfd_final_link_relocate (howto,
5714 input_bfd,
5715 input_section,
5716 contents,
5717 rel->r_offset,
5718 relocation,
5719 addend);
5720
5721 if (r != bfd_reloc_ok)
5722 {
5723 if (sym_name == NULL)
5724 sym_name = "(null)";
5725 if (r == bfd_reloc_overflow)
5726 {
5727 if (warned)
5728 continue;
5729 if (h != NULL
5730 && h->root.type == bfd_link_hash_undefweak
5731 && howto->pc_relative)
5732 {
5733 /* Assume this is a call protected by other code that
5734 detect the symbol is undefined. If this is the case,
5735 we can safely ignore the overflow. If not, the
5736 program is hosed anyway, and a little warning isn't
5737 going to help. */
5738
5739 continue;
5740 }
5741
5742 if (! (*info->callbacks->reloc_overflow) (info,
5743 sym_name,
5744 howto->name,
5745 rel->r_addend,
5746 input_bfd,
5747 input_section,
5748 rel->r_offset))
5749 return FALSE;
5750 }
5751 else
5752 {
5753 (*_bfd_error_handler)
5754 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
5755 bfd_archive_filename (input_bfd),
5756 bfd_get_section_name (input_bfd, input_section),
5757 (long) rel->r_offset, howto->name, sym_name, (int) r);
5758 ret = FALSE;
5759 }
5760 }
5761 }
5762
5763 #ifdef DEBUG
5764 fprintf (stderr, "\n");
5765 #endif
5766
5767 return ret;
5768 }
5769
5770 static enum elf_reloc_type_class
5771 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
5772 {
5773 switch (ELF32_R_TYPE (rela->r_info))
5774 {
5775 case R_PPC_RELATIVE:
5776 return reloc_class_relative;
5777 case R_PPC_REL24:
5778 case R_PPC_ADDR24:
5779 case R_PPC_JMP_SLOT:
5780 return reloc_class_plt;
5781 case R_PPC_COPY:
5782 return reloc_class_copy;
5783 default:
5784 return reloc_class_normal;
5785 }
5786 }
5787 \f
5788 /* Support for core dump NOTE sections. */
5789
5790 static bfd_boolean
5791 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
5792 {
5793 int offset;
5794 unsigned int raw_size;
5795
5796 switch (note->descsz)
5797 {
5798 default:
5799 return FALSE;
5800
5801 case 268: /* Linux/PPC. */
5802 /* pr_cursig */
5803 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
5804
5805 /* pr_pid */
5806 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
5807
5808 /* pr_reg */
5809 offset = 72;
5810 raw_size = 192;
5811
5812 break;
5813 }
5814
5815 /* Make a ".reg/999" section. */
5816 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
5817 raw_size, note->descpos + offset);
5818 }
5819
5820 static bfd_boolean
5821 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
5822 {
5823 switch (note->descsz)
5824 {
5825 default:
5826 return FALSE;
5827
5828 case 128: /* Linux/PPC elf_prpsinfo. */
5829 elf_tdata (abfd)->core_program
5830 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
5831 elf_tdata (abfd)->core_command
5832 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
5833 }
5834
5835 /* Note that for some reason, a spurious space is tacked
5836 onto the end of the args in some (at least one anyway)
5837 implementations, so strip it off if it exists. */
5838
5839 {
5840 char *command = elf_tdata (abfd)->core_command;
5841 int n = strlen (command);
5842
5843 if (0 < n && command[n - 1] == ' ')
5844 command[n - 1] = '\0';
5845 }
5846
5847 return TRUE;
5848 }
5849 \f
5850 /* Very simple linked list structure for recording apuinfo values. */
5851 typedef struct apuinfo_list
5852 {
5853 struct apuinfo_list *next;
5854 unsigned long value;
5855 }
5856 apuinfo_list;
5857
5858 static apuinfo_list *head;
5859
5860
5861 static void
5862 apuinfo_list_init (void)
5863 {
5864 head = NULL;
5865 }
5866
5867 static void
5868 apuinfo_list_add (unsigned long value)
5869 {
5870 apuinfo_list *entry = head;
5871
5872 while (entry != NULL)
5873 {
5874 if (entry->value == value)
5875 return;
5876 entry = entry->next;
5877 }
5878
5879 entry = bfd_malloc (sizeof (* entry));
5880 if (entry == NULL)
5881 return;
5882
5883 entry->value = value;
5884 entry->next = head;
5885 head = entry;
5886 }
5887
5888 static unsigned
5889 apuinfo_list_length (void)
5890 {
5891 apuinfo_list *entry;
5892 unsigned long count;
5893
5894 for (entry = head, count = 0;
5895 entry;
5896 entry = entry->next)
5897 ++ count;
5898
5899 return count;
5900 }
5901
5902 static inline unsigned long
5903 apuinfo_list_element (unsigned long number)
5904 {
5905 apuinfo_list * entry;
5906
5907 for (entry = head;
5908 entry && number --;
5909 entry = entry->next)
5910 ;
5911
5912 return entry ? entry->value : 0;
5913 }
5914
5915 static void
5916 apuinfo_list_finish (void)
5917 {
5918 apuinfo_list *entry;
5919
5920 for (entry = head; entry;)
5921 {
5922 apuinfo_list *next = entry->next;
5923 free (entry);
5924 entry = next;
5925 }
5926
5927 head = NULL;
5928 }
5929
5930 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
5931 #define APUINFO_LABEL "APUinfo"
5932
5933 /* Scan the input BFDs and create a linked list of
5934 the APUinfo values that will need to be emitted. */
5935
5936 static void
5937 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
5938 {
5939 bfd *ibfd;
5940 asection *asec;
5941 char *buffer;
5942 unsigned num_input_sections;
5943 bfd_size_type output_section_size;
5944 unsigned i;
5945 unsigned num_entries;
5946 unsigned long offset;
5947 unsigned long length;
5948 const char *error_message = NULL;
5949
5950 if (link_info == NULL)
5951 return;
5952
5953 /* Scan the input bfds, looking for apuinfo sections. */
5954 num_input_sections = 0;
5955 output_section_size = 0;
5956
5957 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5958 {
5959 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
5960 if (asec)
5961 {
5962 ++ num_input_sections;
5963 output_section_size += asec->_raw_size;
5964 }
5965 }
5966
5967 /* We need at least one input sections
5968 in order to make merging worthwhile. */
5969 if (num_input_sections < 1)
5970 return;
5971
5972 /* Just make sure that the output section exists as well. */
5973 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
5974 if (asec == NULL)
5975 return;
5976
5977 /* Allocate a buffer for the contents of the input sections. */
5978 buffer = bfd_malloc (output_section_size);
5979 if (buffer == NULL)
5980 return;
5981
5982 offset = 0;
5983 apuinfo_list_init ();
5984
5985 /* Read in the input sections contents. */
5986 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
5987 {
5988 unsigned long datum;
5989 char *ptr;
5990
5991 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
5992 if (asec == NULL)
5993 continue;
5994
5995 length = asec->_raw_size;
5996 if (length < 24)
5997 {
5998 error_message = _("corrupt or empty %s section in %s");
5999 goto fail;
6000 }
6001
6002 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
6003 || (bfd_bread (buffer + offset, length, ibfd) != length))
6004 {
6005 error_message = _("unable to read in %s section from %s");
6006 goto fail;
6007 }
6008
6009 /* Process the contents of the section. */
6010 ptr = buffer + offset;
6011 error_message = _("corrupt %s section in %s");
6012
6013 /* Verify the contents of the header. Note - we have to
6014 extract the values this way in order to allow for a
6015 host whose endian-ness is different from the target. */
6016 datum = bfd_get_32 (ibfd, ptr);
6017 if (datum != sizeof APUINFO_LABEL)
6018 goto fail;
6019
6020 datum = bfd_get_32 (ibfd, ptr + 8);
6021 if (datum != 0x2)
6022 goto fail;
6023
6024 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
6025 goto fail;
6026
6027 /* Get the number of bytes used for apuinfo entries. */
6028 datum = bfd_get_32 (ibfd, ptr + 4);
6029 if (datum + 20 != length)
6030 goto fail;
6031
6032 /* Make sure that we do not run off the end of the section. */
6033 if (offset + length > output_section_size)
6034 goto fail;
6035
6036 /* Scan the apuinfo section, building a list of apuinfo numbers. */
6037 for (i = 0; i < datum; i += 4)
6038 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
6039
6040 /* Update the offset. */
6041 offset += length;
6042 }
6043
6044 error_message = NULL;
6045
6046 /* Compute the size of the output section. */
6047 num_entries = apuinfo_list_length ();
6048 output_section_size = 20 + num_entries * 4;
6049
6050 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6051
6052 if (! bfd_set_section_size (abfd, asec, output_section_size))
6053 ibfd = abfd,
6054 error_message = _("warning: unable to set size of %s section in %s");
6055
6056 fail:
6057 free (buffer);
6058
6059 if (error_message)
6060 (*_bfd_error_handler) (error_message, APUINFO_SECTION_NAME,
6061 bfd_archive_filename (ibfd));
6062 }
6063
6064
6065 /* Prevent the output section from accumulating the input sections'
6066 contents. We have already stored this in our linked list structure. */
6067
6068 static bfd_boolean
6069 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
6070 asection *asec,
6071 bfd_byte *contents ATTRIBUTE_UNUSED)
6072 {
6073 return (apuinfo_list_length ()
6074 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
6075 }
6076
6077
6078 /* Finally we can generate the output section. */
6079
6080 static void
6081 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
6082 {
6083 bfd_byte *buffer;
6084 asection *asec;
6085 unsigned i;
6086 unsigned num_entries;
6087 bfd_size_type length;
6088
6089 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
6090 if (asec == NULL)
6091 return;
6092
6093 if (apuinfo_list_length () == 0)
6094 return;
6095
6096 length = asec->_raw_size;
6097 if (length < 20)
6098 return;
6099
6100 buffer = bfd_malloc (length);
6101 if (buffer == NULL)
6102 {
6103 (*_bfd_error_handler)
6104 (_("failed to allocate space for new APUinfo section."));
6105 return;
6106 }
6107
6108 /* Create the apuinfo header. */
6109 num_entries = apuinfo_list_length ();
6110 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
6111 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
6112 bfd_put_32 (abfd, 0x2, buffer + 8);
6113 strcpy (buffer + 12, APUINFO_LABEL);
6114
6115 length = 20;
6116 for (i = 0; i < num_entries; i++)
6117 {
6118 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
6119 length += 4;
6120 }
6121
6122 if (length != asec->_raw_size)
6123 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
6124
6125 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
6126 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
6127
6128 free (buffer);
6129
6130 apuinfo_list_finish ();
6131 }
6132
6133 /* Add extra PPC sections -- Note, for now, make .sbss2 and
6134 .PPC.EMB.sbss0 a normal section, and not a bss section so
6135 that the linker doesn't crater when trying to make more than
6136 2 sections. */
6137
6138 static struct bfd_elf_special_section const ppc_elf_special_sections[]=
6139 {
6140 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
6141 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
6142 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
6143 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
6144 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
6145 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
6146 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
6147 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
6148 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
6149 { NULL, 0, 0, 0, 0 }
6150 };
6151 \f
6152 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
6153 #define TARGET_LITTLE_NAME "elf32-powerpcle"
6154 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
6155 #define TARGET_BIG_NAME "elf32-powerpc"
6156 #define ELF_ARCH bfd_arch_powerpc
6157 #define ELF_MACHINE_CODE EM_PPC
6158 #ifdef __QNXTARGET__
6159 #define ELF_MAXPAGESIZE 0x1000
6160 #else
6161 #define ELF_MAXPAGESIZE 0x10000
6162 #endif
6163 #define elf_info_to_howto ppc_elf_info_to_howto
6164
6165 #ifdef EM_CYGNUS_POWERPC
6166 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6167 #endif
6168
6169 #ifdef EM_PPC_OLD
6170 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6171 #endif
6172
6173 #define elf_backend_plt_not_loaded 1
6174 #define elf_backend_got_symbol_offset 4
6175 #define elf_backend_can_gc_sections 1
6176 #define elf_backend_can_refcount 1
6177 #define elf_backend_got_header_size 12
6178 #define elf_backend_rela_normal 1
6179
6180 #define bfd_elf32_mkobject ppc_elf_mkobject
6181 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
6182 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
6183 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
6184 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
6185 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
6186
6187 #define elf_backend_object_p ppc_elf_object_p
6188 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
6189 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
6190 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
6191 #define elf_backend_relocate_section ppc_elf_relocate_section
6192 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
6193 #define elf_backend_check_relocs ppc_elf_check_relocs
6194 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
6195 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
6196 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
6197 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
6198 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
6199 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
6200 #define elf_backend_fake_sections ppc_elf_fake_sections
6201 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
6202 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
6203 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
6204 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
6205 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
6206 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
6207 #define elf_backend_final_write_processing ppc_elf_final_write_processing
6208 #define elf_backend_write_section ppc_elf_write_section
6209 #define elf_backend_special_sections ppc_elf_special_sections
6210
6211 #include "elf32-target.h"
GDB Binutils - Deliverables
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