1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 95, 96, 97, 98, 1999 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 /* This file is based on a preliminary PowerPC ELF ABI. The
22 information may not match the final PowerPC ELF ABI. It includes
23 suggestions from the in-progress Embedded PowerPC ABI, and that
24 information may also not match. */
33 #define USE_RELA /* we want RELA relocations, not REL */
35 static reloc_howto_type
*ppc_elf_reloc_type_lookup
36 PARAMS ((bfd
*abfd
, bfd_reloc_code_real_type code
));
37 static void ppc_elf_info_to_howto
38 PARAMS ((bfd
*abfd
, arelent
*cache_ptr
, Elf32_Internal_Rela
*dst
));
39 static void ppc_elf_howto_init
PARAMS ((void));
40 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
41 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
42 static boolean ppc_elf_set_private_flags
PARAMS ((bfd
*, flagword
));
43 static boolean ppc_elf_copy_private_bfd_data
PARAMS ((bfd
*, bfd
*));
44 static boolean ppc_elf_merge_private_bfd_data
PARAMS ((bfd
*, bfd
*));
46 static int ppc_elf_additional_program_headers
PARAMS ((bfd
*));
47 static boolean ppc_elf_modify_segment_map
PARAMS ((bfd
*));
49 static boolean ppc_elf_create_dynamic_sections
50 PARAMS ((bfd
*, struct bfd_link_info
*));
52 static boolean ppc_elf_section_from_shdr
PARAMS ((bfd
*,
53 Elf32_Internal_Shdr
*,
55 static boolean ppc_elf_fake_sections
56 PARAMS ((bfd
*, Elf32_Internal_Shdr
*, asection
*));
58 static elf_linker_section_t
*ppc_elf_create_linker_section
60 struct bfd_link_info
*info
,
61 enum elf_linker_section_enum
));
63 static boolean ppc_elf_check_relocs
PARAMS ((bfd
*,
64 struct bfd_link_info
*,
66 const Elf_Internal_Rela
*));
68 static asection
* ppc_elf_gc_mark_hook
PARAMS ((bfd
*abfd
,
69 struct bfd_link_info
*info
,
70 Elf_Internal_Rela
*rel
,
71 struct elf_link_hash_entry
*h
,
72 Elf_Internal_Sym
*sym
));
74 static boolean ppc_elf_gc_sweep_hook
PARAMS ((bfd
*abfd
,
75 struct bfd_link_info
*info
,
77 const Elf_Internal_Rela
*relocs
));
79 static boolean ppc_elf_adjust_dynamic_symbol
PARAMS ((struct bfd_link_info
*,
80 struct elf_link_hash_entry
*));
82 static boolean ppc_elf_size_dynamic_sections
PARAMS ((bfd
*, struct bfd_link_info
*));
84 static boolean ppc_elf_relocate_section
PARAMS ((bfd
*,
85 struct bfd_link_info
*info
,
89 Elf_Internal_Rela
*relocs
,
90 Elf_Internal_Sym
*local_syms
,
93 static boolean ppc_elf_add_symbol_hook
PARAMS ((bfd
*,
94 struct bfd_link_info
*,
95 const Elf_Internal_Sym
*,
101 static boolean ppc_elf_finish_dynamic_symbol
PARAMS ((bfd
*,
102 struct bfd_link_info
*,
103 struct elf_link_hash_entry
*,
104 Elf_Internal_Sym
*));
106 static boolean ppc_elf_finish_dynamic_sections
PARAMS ((bfd
*, struct bfd_link_info
*));
108 #define BRANCH_PREDICT_BIT 0x200000 /* branch prediction bit for branch taken relocs */
109 #define RA_REGISTER_MASK 0x001f0000 /* mask to set RA in memory instructions */
110 #define RA_REGISTER_SHIFT 16 /* value to shift register by to insert RA */
112 /* The name of the dynamic interpreter. This is put in the .interp
115 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
117 /* The size in bytes of an entry in the procedure linkage table. */
118 #define PLT_ENTRY_SIZE 12
119 /* The initial size of the plt reserved for the dynamic linker. */
120 #define PLT_INITIAL_ENTRY_SIZE 72
121 /* The size of the gap between entries in the PLT. */
122 #define PLT_SLOT_SIZE 8
123 /* The number of single-slot PLT entries (the rest use two slots). */
124 #define PLT_NUM_SINGLE_ENTRIES 8192
126 /* Will references to this symbol always reference the symbol
128 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
131 || H->dynindx == -1 \
132 || ELF_ST_VISIBILITY (H->other) == STV_INTERNAL \
133 || ELF_ST_VISIBILITY (H->other) == STV_HIDDEN) \
134 && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
136 /* Will _calls_ to this symbol always call the version in this object? */
137 #define SYMBOL_CALLS_LOCAL(INFO, H) \
140 || H->dynindx == -1 \
141 || ELF_ST_VISIBILITY (H->other) != STV_DEFAULT) \
142 && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
144 static reloc_howto_type
*ppc_elf_howto_table
[(int) R_PPC_max
];
146 static reloc_howto_type ppc_elf_howto_raw
[] = {
147 /* This reloc does nothing. */
148 HOWTO (R_PPC_NONE
, /* type */
150 2, /* size (0 = byte, 1 = short, 2 = long) */
152 false, /* pc_relative */
154 complain_overflow_bitfield
, /* complain_on_overflow */
155 bfd_elf_generic_reloc
, /* special_function */
156 "R_PPC_NONE", /* name */
157 false, /* partial_inplace */
160 false), /* pcrel_offset */
162 /* A standard 32 bit relocation. */
163 HOWTO (R_PPC_ADDR32
, /* type */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
167 false, /* pc_relative */
169 complain_overflow_bitfield
, /* complain_on_overflow */
170 bfd_elf_generic_reloc
, /* special_function */
171 "R_PPC_ADDR32", /* name */
172 false, /* partial_inplace */
174 0xffffffff, /* dst_mask */
175 false), /* pcrel_offset */
177 /* An absolute 26 bit branch; the lower two bits must be zero.
178 FIXME: we don't check that, we just clear them. */
179 HOWTO (R_PPC_ADDR24
, /* type */
181 2, /* size (0 = byte, 1 = short, 2 = long) */
183 false, /* pc_relative */
185 complain_overflow_bitfield
, /* complain_on_overflow */
186 bfd_elf_generic_reloc
, /* special_function */
187 "R_PPC_ADDR24", /* name */
188 false, /* partial_inplace */
190 0x3fffffc, /* dst_mask */
191 false), /* pcrel_offset */
193 /* A standard 16 bit relocation. */
194 HOWTO (R_PPC_ADDR16
, /* type */
196 1, /* size (0 = byte, 1 = short, 2 = long) */
198 false, /* pc_relative */
200 complain_overflow_bitfield
, /* complain_on_overflow */
201 bfd_elf_generic_reloc
, /* special_function */
202 "R_PPC_ADDR16", /* name */
203 false, /* partial_inplace */
205 0xffff, /* dst_mask */
206 false), /* pcrel_offset */
208 /* A 16 bit relocation without overflow. */
209 HOWTO (R_PPC_ADDR16_LO
, /* type */
211 1, /* size (0 = byte, 1 = short, 2 = long) */
213 false, /* pc_relative */
215 complain_overflow_dont
,/* complain_on_overflow */
216 bfd_elf_generic_reloc
, /* special_function */
217 "R_PPC_ADDR16_LO", /* name */
218 false, /* partial_inplace */
220 0xffff, /* dst_mask */
221 false), /* pcrel_offset */
223 /* The high order 16 bits of an address. */
224 HOWTO (R_PPC_ADDR16_HI
, /* type */
226 1, /* size (0 = byte, 1 = short, 2 = long) */
228 false, /* pc_relative */
230 complain_overflow_dont
, /* complain_on_overflow */
231 bfd_elf_generic_reloc
, /* special_function */
232 "R_PPC_ADDR16_HI", /* name */
233 false, /* partial_inplace */
235 0xffff, /* dst_mask */
236 false), /* pcrel_offset */
238 /* The high order 16 bits of an address, plus 1 if the contents of
239 the low 16 bits, treated as a signed number, is negative. */
240 HOWTO (R_PPC_ADDR16_HA
, /* type */
242 1, /* size (0 = byte, 1 = short, 2 = long) */
244 false, /* pc_relative */
246 complain_overflow_dont
, /* complain_on_overflow */
247 ppc_elf_addr16_ha_reloc
, /* special_function */
248 "R_PPC_ADDR16_HA", /* name */
249 false, /* partial_inplace */
251 0xffff, /* dst_mask */
252 false), /* pcrel_offset */
254 /* An absolute 16 bit branch; the lower two bits must be zero.
255 FIXME: we don't check that, we just clear them. */
256 HOWTO (R_PPC_ADDR14
, /* type */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
260 false, /* pc_relative */
262 complain_overflow_bitfield
, /* complain_on_overflow */
263 bfd_elf_generic_reloc
, /* special_function */
264 "R_PPC_ADDR14", /* name */
265 false, /* partial_inplace */
267 0xfffc, /* dst_mask */
268 false), /* pcrel_offset */
270 /* An absolute 16 bit branch, for which bit 10 should be set to
271 indicate that the branch is expected to be taken. The lower two
272 bits must be zero. */
273 HOWTO (R_PPC_ADDR14_BRTAKEN
, /* type */
275 2, /* size (0 = byte, 1 = short, 2 = long) */
277 false, /* pc_relative */
279 complain_overflow_bitfield
, /* complain_on_overflow */
280 bfd_elf_generic_reloc
, /* special_function */
281 "R_PPC_ADDR14_BRTAKEN",/* name */
282 false, /* partial_inplace */
284 0xfffc, /* dst_mask */
285 false), /* pcrel_offset */
287 /* An absolute 16 bit branch, for which bit 10 should be set to
288 indicate that the branch is not expected to be taken. The lower
289 two bits must be zero. */
290 HOWTO (R_PPC_ADDR14_BRNTAKEN
, /* type */
292 2, /* size (0 = byte, 1 = short, 2 = long) */
294 false, /* pc_relative */
296 complain_overflow_bitfield
, /* complain_on_overflow */
297 bfd_elf_generic_reloc
, /* special_function */
298 "R_PPC_ADDR14_BRNTAKEN",/* name */
299 false, /* partial_inplace */
301 0xfffc, /* dst_mask */
302 false), /* pcrel_offset */
304 /* A relative 26 bit branch; the lower two bits must be zero. */
305 HOWTO (R_PPC_REL24
, /* type */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
309 true, /* pc_relative */
311 complain_overflow_signed
, /* complain_on_overflow */
312 bfd_elf_generic_reloc
, /* special_function */
313 "R_PPC_REL24", /* name */
314 false, /* partial_inplace */
316 0x3fffffc, /* dst_mask */
317 true), /* pcrel_offset */
319 /* A relative 16 bit branch; the lower two bits must be zero. */
320 HOWTO (R_PPC_REL14
, /* type */
322 2, /* size (0 = byte, 1 = short, 2 = long) */
324 true, /* pc_relative */
326 complain_overflow_signed
, /* complain_on_overflow */
327 bfd_elf_generic_reloc
, /* special_function */
328 "R_PPC_REL14", /* name */
329 false, /* partial_inplace */
331 0xfffc, /* dst_mask */
332 true), /* pcrel_offset */
334 /* A relative 16 bit branch. Bit 10 should be set to indicate that
335 the branch is expected to be taken. The lower two bits must be
337 HOWTO (R_PPC_REL14_BRTAKEN
, /* type */
339 2, /* size (0 = byte, 1 = short, 2 = long) */
341 true, /* pc_relative */
343 complain_overflow_signed
, /* complain_on_overflow */
344 bfd_elf_generic_reloc
, /* special_function */
345 "R_PPC_REL14_BRTAKEN", /* name */
346 false, /* partial_inplace */
348 0xfffc, /* dst_mask */
349 true), /* pcrel_offset */
351 /* A relative 16 bit branch. Bit 10 should be set to indicate that
352 the branch is not expected to be taken. The lower two bits must
354 HOWTO (R_PPC_REL14_BRNTAKEN
, /* type */
356 2, /* size (0 = byte, 1 = short, 2 = long) */
358 true, /* pc_relative */
360 complain_overflow_signed
, /* complain_on_overflow */
361 bfd_elf_generic_reloc
, /* special_function */
362 "R_PPC_REL14_BRNTAKEN",/* name */
363 false, /* partial_inplace */
365 0xfffc, /* dst_mask */
366 true), /* pcrel_offset */
368 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
370 HOWTO (R_PPC_GOT16
, /* type */
372 1, /* size (0 = byte, 1 = short, 2 = long) */
374 false, /* pc_relative */
376 complain_overflow_signed
, /* complain_on_overflow */
377 bfd_elf_generic_reloc
, /* special_function */
378 "R_PPC_GOT16", /* name */
379 false, /* partial_inplace */
381 0xffff, /* dst_mask */
382 false), /* pcrel_offset */
384 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
386 HOWTO (R_PPC_GOT16_LO
, /* type */
388 1, /* size (0 = byte, 1 = short, 2 = long) */
390 false, /* pc_relative */
392 complain_overflow_dont
, /* complain_on_overflow */
393 bfd_elf_generic_reloc
, /* special_function */
394 "R_PPC_GOT16_LO", /* name */
395 false, /* partial_inplace */
397 0xffff, /* dst_mask */
398 false), /* pcrel_offset */
400 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
402 HOWTO (R_PPC_GOT16_HI
, /* type */
404 1, /* size (0 = byte, 1 = short, 2 = long) */
406 false, /* pc_relative */
408 complain_overflow_bitfield
, /* complain_on_overflow */
409 bfd_elf_generic_reloc
, /* special_function */
410 "R_PPC_GOT16_HI", /* name */
411 false, /* partial_inplace */
413 0xffff, /* dst_mask */
414 false), /* pcrel_offset */
416 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
418 HOWTO (R_PPC_GOT16_HA
, /* type */
420 1, /* size (0 = byte, 1 = short, 2 = long) */
422 false, /* pc_relative */
424 complain_overflow_bitfield
, /* complain_on_overflow */
425 ppc_elf_addr16_ha_reloc
, /* special_function */
426 "R_PPC_GOT16_HA", /* name */
427 false, /* partial_inplace */
429 0xffff, /* dst_mask */
430 false), /* pcrel_offset */
432 /* Like R_PPC_REL24, but referring to the procedure linkage table
433 entry for the symbol. */
434 HOWTO (R_PPC_PLTREL24
, /* type */
436 2, /* size (0 = byte, 1 = short, 2 = long) */
438 true, /* pc_relative */
440 complain_overflow_signed
, /* complain_on_overflow */
441 bfd_elf_generic_reloc
, /* special_function */
442 "R_PPC_PLTREL24", /* name */
443 false, /* partial_inplace */
445 0x3fffffc, /* dst_mask */
446 true), /* pcrel_offset */
448 /* This is used only by the dynamic linker. The symbol should exist
449 both in the object being run and in some shared library. The
450 dynamic linker copies the data addressed by the symbol from the
451 shared library into the object, because the object being
452 run has to have the data at some particular address. */
453 HOWTO (R_PPC_COPY
, /* type */
455 2, /* size (0 = byte, 1 = short, 2 = long) */
457 false, /* pc_relative */
459 complain_overflow_bitfield
, /* complain_on_overflow */
460 bfd_elf_generic_reloc
, /* special_function */
461 "R_PPC_COPY", /* name */
462 false, /* partial_inplace */
465 false), /* pcrel_offset */
467 /* Like R_PPC_ADDR32, but used when setting global offset table
469 HOWTO (R_PPC_GLOB_DAT
, /* type */
471 2, /* size (0 = byte, 1 = short, 2 = long) */
473 false, /* pc_relative */
475 complain_overflow_bitfield
, /* complain_on_overflow */
476 bfd_elf_generic_reloc
, /* special_function */
477 "R_PPC_GLOB_DAT", /* name */
478 false, /* partial_inplace */
480 0xffffffff, /* dst_mask */
481 false), /* pcrel_offset */
483 /* Marks a procedure linkage table entry for a symbol. */
484 HOWTO (R_PPC_JMP_SLOT
, /* type */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
488 false, /* pc_relative */
490 complain_overflow_bitfield
, /* complain_on_overflow */
491 bfd_elf_generic_reloc
, /* special_function */
492 "R_PPC_JMP_SLOT", /* name */
493 false, /* partial_inplace */
496 false), /* pcrel_offset */
498 /* Used only by the dynamic linker. When the object is run, this
499 longword is set to the load address of the object, plus the
501 HOWTO (R_PPC_RELATIVE
, /* type */
503 2, /* size (0 = byte, 1 = short, 2 = long) */
505 false, /* pc_relative */
507 complain_overflow_bitfield
, /* complain_on_overflow */
508 bfd_elf_generic_reloc
, /* special_function */
509 "R_PPC_RELATIVE", /* name */
510 false, /* partial_inplace */
512 0xffffffff, /* dst_mask */
513 false), /* pcrel_offset */
515 /* Like R_PPC_REL24, but uses the value of the symbol within the
516 object rather than the final value. Normally used for
517 _GLOBAL_OFFSET_TABLE_. */
518 HOWTO (R_PPC_LOCAL24PC
, /* type */
520 2, /* size (0 = byte, 1 = short, 2 = long) */
522 true, /* pc_relative */
524 complain_overflow_signed
, /* complain_on_overflow */
525 bfd_elf_generic_reloc
, /* special_function */
526 "R_PPC_LOCAL24PC", /* name */
527 false, /* partial_inplace */
529 0x3fffffc, /* dst_mask */
530 true), /* pcrel_offset */
532 /* Like R_PPC_ADDR32, but may be unaligned. */
533 HOWTO (R_PPC_UADDR32
, /* type */
535 2, /* size (0 = byte, 1 = short, 2 = long) */
537 false, /* pc_relative */
539 complain_overflow_bitfield
, /* complain_on_overflow */
540 bfd_elf_generic_reloc
, /* special_function */
541 "R_PPC_UADDR32", /* name */
542 false, /* partial_inplace */
544 0xffffffff, /* dst_mask */
545 false), /* pcrel_offset */
547 /* Like R_PPC_ADDR16, but may be unaligned. */
548 HOWTO (R_PPC_UADDR16
, /* type */
550 1, /* size (0 = byte, 1 = short, 2 = long) */
552 false, /* pc_relative */
554 complain_overflow_bitfield
, /* complain_on_overflow */
555 bfd_elf_generic_reloc
, /* special_function */
556 "R_PPC_UADDR16", /* name */
557 false, /* partial_inplace */
559 0xffff, /* dst_mask */
560 false), /* pcrel_offset */
562 /* 32-bit PC relative */
563 HOWTO (R_PPC_REL32
, /* type */
565 2, /* size (0 = byte, 1 = short, 2 = long) */
567 true, /* pc_relative */
569 complain_overflow_bitfield
, /* complain_on_overflow */
570 bfd_elf_generic_reloc
, /* special_function */
571 "R_PPC_REL32", /* name */
572 false, /* partial_inplace */
574 0xffffffff, /* dst_mask */
575 true), /* pcrel_offset */
577 /* 32-bit relocation to the symbol's procedure linkage table.
578 FIXME: not supported. */
579 HOWTO (R_PPC_PLT32
, /* type */
581 2, /* size (0 = byte, 1 = short, 2 = long) */
583 false, /* pc_relative */
585 complain_overflow_bitfield
, /* complain_on_overflow */
586 bfd_elf_generic_reloc
, /* special_function */
587 "R_PPC_PLT32", /* name */
588 false, /* partial_inplace */
591 false), /* pcrel_offset */
593 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
594 FIXME: not supported. */
595 HOWTO (R_PPC_PLTREL32
, /* type */
597 2, /* size (0 = byte, 1 = short, 2 = long) */
599 true, /* pc_relative */
601 complain_overflow_bitfield
, /* complain_on_overflow */
602 bfd_elf_generic_reloc
, /* special_function */
603 "R_PPC_PLTREL32", /* name */
604 false, /* partial_inplace */
607 true), /* pcrel_offset */
609 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
611 HOWTO (R_PPC_PLT16_LO
, /* type */
613 1, /* size (0 = byte, 1 = short, 2 = long) */
615 false, /* pc_relative */
617 complain_overflow_dont
, /* complain_on_overflow */
618 bfd_elf_generic_reloc
, /* special_function */
619 "R_PPC_PLT16_LO", /* name */
620 false, /* partial_inplace */
622 0xffff, /* dst_mask */
623 false), /* pcrel_offset */
625 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
627 HOWTO (R_PPC_PLT16_HI
, /* type */
629 1, /* size (0 = byte, 1 = short, 2 = long) */
631 false, /* pc_relative */
633 complain_overflow_bitfield
, /* complain_on_overflow */
634 bfd_elf_generic_reloc
, /* special_function */
635 "R_PPC_PLT16_HI", /* name */
636 false, /* partial_inplace */
638 0xffff, /* dst_mask */
639 false), /* pcrel_offset */
641 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
643 HOWTO (R_PPC_PLT16_HA
, /* type */
645 1, /* size (0 = byte, 1 = short, 2 = long) */
647 false, /* pc_relative */
649 complain_overflow_bitfield
, /* complain_on_overflow */
650 ppc_elf_addr16_ha_reloc
, /* special_function */
651 "R_PPC_PLT16_HA", /* name */
652 false, /* partial_inplace */
654 0xffff, /* dst_mask */
655 false), /* pcrel_offset */
657 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
659 HOWTO (R_PPC_SDAREL16
, /* type */
661 1, /* size (0 = byte, 1 = short, 2 = long) */
663 false, /* pc_relative */
665 complain_overflow_signed
, /* complain_on_overflow */
666 bfd_elf_generic_reloc
, /* special_function */
667 "R_PPC_SDAREL16", /* name */
668 false, /* partial_inplace */
670 0xffff, /* dst_mask */
671 false), /* pcrel_offset */
673 /* 32-bit section relative relocation. */
674 HOWTO (R_PPC_SECTOFF
, /* type */
676 2, /* size (0 = byte, 1 = short, 2 = long) */
678 true, /* pc_relative */
680 complain_overflow_bitfield
, /* complain_on_overflow */
681 bfd_elf_generic_reloc
, /* special_function */
682 "R_PPC_SECTOFF", /* name */
683 false, /* partial_inplace */
686 true), /* pcrel_offset */
688 /* 16-bit lower half section relative relocation. */
689 HOWTO (R_PPC_SECTOFF_LO
, /* type */
691 1, /* size (0 = byte, 1 = short, 2 = long) */
693 false, /* pc_relative */
695 complain_overflow_dont
, /* complain_on_overflow */
696 bfd_elf_generic_reloc
, /* special_function */
697 "R_PPC_SECTOFF_LO", /* name */
698 false, /* partial_inplace */
700 0xffff, /* dst_mask */
701 false), /* pcrel_offset */
703 /* 16-bit upper half section relative relocation. */
704 HOWTO (R_PPC_SECTOFF_HI
, /* type */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
708 false, /* pc_relative */
710 complain_overflow_bitfield
, /* complain_on_overflow */
711 bfd_elf_generic_reloc
, /* special_function */
712 "R_PPC_SECTOFF_HI", /* name */
713 false, /* partial_inplace */
715 0xffff, /* dst_mask */
716 false), /* pcrel_offset */
718 /* 16-bit upper half adjusted section relative relocation. */
719 HOWTO (R_PPC_SECTOFF_HA
, /* type */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
723 false, /* pc_relative */
725 complain_overflow_bitfield
, /* complain_on_overflow */
726 ppc_elf_addr16_ha_reloc
, /* special_function */
727 "R_PPC_SECTOFF_HA", /* name */
728 false, /* partial_inplace */
730 0xffff, /* dst_mask */
731 false), /* pcrel_offset */
733 /* The remaining relocs are from the Embedded ELF ABI, and are not
734 in the SVR4 ELF ABI. */
736 /* 32 bit value resulting from the addend minus the symbol */
737 HOWTO (R_PPC_EMB_NADDR32
, /* type */
739 2, /* size (0 = byte, 1 = short, 2 = long) */
741 false, /* pc_relative */
743 complain_overflow_bitfield
, /* complain_on_overflow */
744 bfd_elf_generic_reloc
, /* special_function */
745 "R_PPC_EMB_NADDR32", /* name */
746 false, /* partial_inplace */
748 0xffffffff, /* dst_mask */
749 false), /* pcrel_offset */
751 /* 16 bit value resulting from the addend minus the symbol */
752 HOWTO (R_PPC_EMB_NADDR16
, /* type */
754 1, /* size (0 = byte, 1 = short, 2 = long) */
756 false, /* pc_relative */
758 complain_overflow_bitfield
, /* complain_on_overflow */
759 bfd_elf_generic_reloc
, /* special_function */
760 "R_PPC_EMB_NADDR16", /* name */
761 false, /* partial_inplace */
763 0xffff, /* dst_mask */
764 false), /* pcrel_offset */
766 /* 16 bit value resulting from the addend minus the symbol */
767 HOWTO (R_PPC_EMB_NADDR16_LO
, /* type */
769 1, /* size (0 = byte, 1 = short, 2 = long) */
771 false, /* pc_relative */
773 complain_overflow_dont
,/* complain_on_overflow */
774 bfd_elf_generic_reloc
, /* special_function */
775 "R_PPC_EMB_ADDR16_LO", /* name */
776 false, /* partial_inplace */
778 0xffff, /* dst_mask */
779 false), /* pcrel_offset */
781 /* The high order 16 bits of the addend minus the symbol */
782 HOWTO (R_PPC_EMB_NADDR16_HI
, /* type */
784 1, /* size (0 = byte, 1 = short, 2 = long) */
786 false, /* pc_relative */
788 complain_overflow_dont
, /* complain_on_overflow */
789 bfd_elf_generic_reloc
, /* special_function */
790 "R_PPC_EMB_NADDR16_HI", /* name */
791 false, /* partial_inplace */
793 0xffff, /* dst_mask */
794 false), /* pcrel_offset */
796 /* The high order 16 bits of the result of the addend minus the address,
797 plus 1 if the contents of the low 16 bits, treated as a signed number,
799 HOWTO (R_PPC_EMB_NADDR16_HA
, /* type */
801 1, /* size (0 = byte, 1 = short, 2 = long) */
803 false, /* pc_relative */
805 complain_overflow_dont
, /* complain_on_overflow */
806 ppc_elf_addr16_ha_reloc
, /* special_function */
807 "R_PPC_EMB_NADDR16_HA", /* name */
808 false, /* partial_inplace */
810 0xffff, /* dst_mask */
811 false), /* pcrel_offset */
813 /* 16 bit value resulting from allocating a 4 byte word to hold an
814 address in the .sdata section, and returning the offset from
815 _SDA_BASE_ for that relocation */
816 HOWTO (R_PPC_EMB_SDAI16
, /* type */
818 1, /* size (0 = byte, 1 = short, 2 = long) */
820 false, /* pc_relative */
822 complain_overflow_bitfield
, /* complain_on_overflow */
823 bfd_elf_generic_reloc
, /* special_function */
824 "R_PPC_EMB_SDAI16", /* name */
825 false, /* partial_inplace */
827 0xffff, /* dst_mask */
828 false), /* pcrel_offset */
830 /* 16 bit value resulting from allocating a 4 byte word to hold an
831 address in the .sdata2 section, and returning the offset from
832 _SDA2_BASE_ for that relocation */
833 HOWTO (R_PPC_EMB_SDA2I16
, /* type */
835 1, /* size (0 = byte, 1 = short, 2 = long) */
837 false, /* pc_relative */
839 complain_overflow_bitfield
, /* complain_on_overflow */
840 bfd_elf_generic_reloc
, /* special_function */
841 "R_PPC_EMB_SDA2I16", /* name */
842 false, /* partial_inplace */
844 0xffff, /* dst_mask */
845 false), /* pcrel_offset */
847 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
849 HOWTO (R_PPC_EMB_SDA2REL
, /* type */
851 1, /* size (0 = byte, 1 = short, 2 = long) */
853 false, /* pc_relative */
855 complain_overflow_signed
, /* complain_on_overflow */
856 bfd_elf_generic_reloc
, /* special_function */
857 "R_PPC_EMB_SDA2REL", /* name */
858 false, /* partial_inplace */
860 0xffff, /* dst_mask */
861 false), /* pcrel_offset */
863 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
864 signed offset from the appropriate base, and filling in the register
865 field with the appropriate register (0, 2, or 13). */
866 HOWTO (R_PPC_EMB_SDA21
, /* type */
868 2, /* size (0 = byte, 1 = short, 2 = long) */
870 false, /* pc_relative */
872 complain_overflow_signed
, /* complain_on_overflow */
873 bfd_elf_generic_reloc
, /* special_function */
874 "R_PPC_EMB_SDA21", /* name */
875 false, /* partial_inplace */
877 0xffff, /* dst_mask */
878 false), /* pcrel_offset */
880 /* Relocation not handled: R_PPC_EMB_MRKREF */
881 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
882 /* Relocation not handled: R_PPC_EMB_RELST_LO */
883 /* Relocation not handled: R_PPC_EMB_RELST_HI */
884 /* Relocation not handled: R_PPC_EMB_RELST_HA */
885 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
887 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
888 in the 16 bit signed offset from the appropriate base, and filling in the
889 register field with the appropriate register (0, 2, or 13). */
890 HOWTO (R_PPC_EMB_RELSDA
, /* type */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
894 true, /* pc_relative */
896 complain_overflow_signed
, /* complain_on_overflow */
897 bfd_elf_generic_reloc
, /* special_function */
898 "R_PPC_EMB_RELSDA", /* name */
899 false, /* partial_inplace */
901 0xffff, /* dst_mask */
902 false), /* pcrel_offset */
904 /* GNU extension to record C++ vtable hierarchy */
905 HOWTO (R_PPC_GNU_VTINHERIT
, /* type */
907 0, /* size (0 = byte, 1 = short, 2 = long) */
909 false, /* pc_relative */
911 complain_overflow_dont
, /* complain_on_overflow */
912 NULL
, /* special_function */
913 "R_PPC_GNU_VTINHERIT", /* name */
914 false, /* partial_inplace */
917 false), /* pcrel_offset */
919 /* GNU extension to record C++ vtable member usage */
920 HOWTO (R_PPC_GNU_VTENTRY
, /* type */
922 0, /* size (0 = byte, 1 = short, 2 = long) */
924 false, /* pc_relative */
926 complain_overflow_dont
, /* complain_on_overflow */
927 NULL
, /* special_function */
928 "R_PPC_GNU_VTENTRY", /* name */
929 false, /* partial_inplace */
932 false), /* pcrel_offset */
934 /* Phony reloc to handle AIX style TOC entries */
935 HOWTO (R_PPC_TOC16
, /* type */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
939 false, /* pc_relative */
941 complain_overflow_signed
, /* complain_on_overflow */
942 bfd_elf_generic_reloc
, /* special_function */
943 "R_PPC_TOC16", /* name */
944 false, /* partial_inplace */
946 0xffff, /* dst_mask */
947 false), /* pcrel_offset */
950 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
953 ppc_elf_howto_init ()
955 unsigned int i
, type
;
957 for (i
= 0; i
< sizeof (ppc_elf_howto_raw
) / sizeof (ppc_elf_howto_raw
[0]); i
++)
959 type
= ppc_elf_howto_raw
[i
].type
;
960 BFD_ASSERT (type
< sizeof (ppc_elf_howto_table
) / sizeof (ppc_elf_howto_table
[0]));
961 ppc_elf_howto_table
[type
] = &ppc_elf_howto_raw
[i
];
965 /* This function handles relaxing for the PPC with option --mpc860c0[=<n>].
967 The MPC860, revision C0 or earlier contains a bug in the die.
968 If all of the following conditions are true, the next instruction
969 to be executed *may* be treated as a no-op.
970 1/ A forward branch is executed.
971 2/ The branch is predicted as not taken.
972 3/ The branch is taken.
973 4/ The branch is located in the last 5 words of a page.
974 (The EOP limit is 5 by default but may be specified as any value from 1-10.)
976 Our software solution is to detect these problematic branches in a
977 linker pass and modify them as follows:
978 1/ Unconditional branches - Since these are always predicted taken,
979 there is no problem and no action is required.
980 2/ Conditional backward branches - No problem, no action required.
981 3/ Conditional forward branches - Ensure that the "inverse prediction
982 bit" is set (ensure it is predicted taken).
983 4/ Conditional register branches - Ensure that the "y bit" is set
984 (ensure it is predicted taken).
987 /* Sort sections by address. */
990 ppc_elf_sort_rela (arg1
, arg2
)
994 const Elf_Internal_Rela
**rela1
= (const Elf_Internal_Rela
**) arg1
;
995 const Elf_Internal_Rela
**rela2
= (const Elf_Internal_Rela
**) arg2
;
997 /* Sort by offset. */
998 return ((*rela1
)->r_offset
- (*rela2
)->r_offset
);
1002 ppc_elf_relax_section (abfd
, isec
, link_info
, again
)
1005 struct bfd_link_info
*link_info
;
1008 #define PAGESIZE 0x1000
1010 bfd_byte
*contents
= NULL
;
1011 bfd_byte
*free_contents
= NULL
;
1012 Elf_Internal_Rela
*internal_relocs
= NULL
;
1013 Elf_Internal_Rela
*free_relocs
= NULL
;
1014 Elf_Internal_Rela
**rela_comb
= NULL
;
1015 int comb_curr
, comb_count
;
1017 /* We never have to do this more than once per input section. */
1020 /* If needed, initialize this section's cooked size. */
1021 if (isec
->_cooked_size
== 0)
1022 isec
->_cooked_size
= isec
->_raw_size
;
1024 /* We're only interested in text sections which overlap the
1025 troublesome area at the end of a page. */
1026 if (link_info
->mpc860c0
&& (isec
->flags
& SEC_CODE
) && isec
->_cooked_size
)
1028 bfd_vma dot
, end_page
, end_section
;
1029 boolean section_modified
;
1031 /* Get the section contents. */
1032 /* Get cached copy if it exists. */
1033 if (elf_section_data (isec
)->this_hdr
.contents
!= NULL
)
1034 contents
= elf_section_data (isec
)->this_hdr
.contents
;
1037 /* Go get them off disk. */
1038 contents
= (bfd_byte
*) bfd_malloc (isec
->_raw_size
);
1039 if (contents
== NULL
)
1041 free_contents
= contents
;
1043 if (! bfd_get_section_contents (abfd
, isec
, contents
,
1044 (file_ptr
) 0, isec
->_raw_size
))
1050 if (isec
->reloc_count
)
1054 /* Get a copy of the native relocations. */
1055 internal_relocs
= _bfd_elf32_link_read_relocs (
1056 abfd
, isec
, (PTR
) NULL
, (Elf_Internal_Rela
*) NULL
,
1057 link_info
->keep_memory
);
1058 if (internal_relocs
== NULL
)
1060 if (! link_info
->keep_memory
)
1061 free_relocs
= internal_relocs
;
1063 /* Setup a faster access method for the reloc info we need. */
1064 rela_comb
= (Elf_Internal_Rela
**)
1065 bfd_malloc (isec
->reloc_count
*sizeof (Elf_Internal_Rela
*));
1066 if (rela_comb
== NULL
)
1068 for (n
= 0; n
< isec
->reloc_count
; ++n
)
1072 r_type
= ELF32_R_TYPE (internal_relocs
[n
].r_info
);
1073 if (r_type
< 0 || r_type
>= (int) R_PPC_max
)
1076 /* Prologue constants are sometimes present in the ".text"
1077 sections and they can be identified by their associated relocation.
1078 We don't want to process those words and some others which
1079 can also be identified by their relocations. However, not all
1080 conditional branches will have a relocation so we will
1081 only ignore words that 1) have a reloc, and 2) the reloc
1082 is not applicable to a conditional branch.
1083 The array rela_comb is built here for use in the EOP scan loop. */
1086 case R_PPC_ADDR14_BRNTAKEN
: /* absolute, predicted not taken */
1087 case R_PPC_REL14
: /* relative cond. br. */
1088 case R_PPC_REL14_BRNTAKEN
: /* rel. cond. br., predicted not taken */
1089 /* We should check the instruction. */
1092 /* The word is not a conditional branch - ignore it. */
1093 rela_comb
[comb_count
++] = &internal_relocs
[n
];
1098 qsort (rela_comb
, (size_t) comb_count
, sizeof (int), ppc_elf_sort_rela
);
1101 /* Enumerate each EOP region that overlaps this section. */
1102 end_section
= isec
->vma
+ isec
->_cooked_size
;
1103 dot
= end_page
= (isec
->vma
| (PAGESIZE
- 1)) + 1;
1104 dot
-= link_info
->mpc860c0
;
1105 section_modified
= false;
1106 if (dot
< isec
->vma
) /* Increment the start position if this section */
1107 dot
= isec
->vma
; /* begins in the middle of its first EOP region. */
1110 dot
+= PAGESIZE
, end_page
+= PAGESIZE
)
1113 /* Check each word in this EOP region. */
1114 for (; dot
< end_page
; dot
+= 4)
1116 bfd_vma isec_offset
;
1118 boolean skip
, modified
;
1120 /* Don't process this word if there is a relocation for it and
1121 the relocation indicates the word is not a conditional branch. */
1123 isec_offset
= dot
- isec
->vma
;
1124 for (; comb_curr
<comb_count
; ++comb_curr
)
1128 r_offset
= rela_comb
[comb_curr
]->r_offset
;
1129 if (r_offset
>= isec_offset
)
1131 if (r_offset
== isec_offset
) skip
= true;
1137 /* Check the current word for a problematic conditional branch. */
1138 #define BO0(insn) ((insn) & 0x02000000)
1139 #define BO2(insn) ((insn) & 0x00800000)
1140 #define BO4(insn) ((insn) & 0x00200000)
1141 insn
= (unsigned long) bfd_get_32 (abfd
, contents
+ isec_offset
);
1143 if ((insn
& 0xFc000000) == 0x40000000)
1145 /* Instruction is BCx */
1146 if ((!BO0(insn
) || !BO2(insn
)) && !BO4(insn
))
1149 /* This branch is predicted as "normal".
1150 If this is a forward branch, it is problematic. */
1152 target
= insn
& 0x0000Fffc; /*extract*/
1153 target
= (target
^ 0x8000) - 0x8000; /*sign extend*/
1154 if ((insn
& 0x00000002) == 0)
1155 target
+= dot
; /*convert to abs*/
1158 insn
|= 0x00200000; /* set the prediction bit */
1163 else if ((insn
& 0xFc00Fffe) == 0x4c000420)
1165 /* Instruction is BCCTRx */
1166 if ((!BO0(insn
) || !BO2(insn
)) && !BO4(insn
))
1168 /* This branch is predicted as not-taken.
1169 If this is a forward branch, it is problematic.
1170 Since we can't tell statically if it will branch forward,
1171 always set the prediction bit. */
1172 insn
|= 0x00200000; /* set the prediction bit */
1176 else if ((insn
& 0xFc00Fffe) == 0x4c000020)
1178 /* Instruction is BCLRx */
1179 if ((!BO0(insn
) || !BO2(insn
)) && !BO4(insn
))
1181 /* This branch is predicted as not-taken.
1182 If this is a forward branch, it is problematic.
1183 Since we can't tell statically if it will branch forward,
1184 always set the prediction bit. */
1185 insn
|= 0x00200000; /* set the prediction bit */
1194 bfd_put_32 (abfd
, insn
, contents
+ isec_offset
);
1195 section_modified
= true;
1199 if (section_modified
)
1201 elf_section_data (isec
)->this_hdr
.contents
= contents
;
1202 free_contents
= NULL
;
1206 if (rela_comb
!= NULL
)
1212 if (free_relocs
!= NULL
)
1218 if (free_contents
!= NULL
)
1220 if (! link_info
->keep_memory
)
1221 free (free_contents
);
1224 /* Cache the section contents for elf_link_input_bfd. */
1225 elf_section_data (isec
)->this_hdr
.contents
= contents
;
1227 free_contents
= NULL
;
1233 if (rela_comb
!= NULL
)
1235 if (free_relocs
!= NULL
)
1237 if (free_contents
!= NULL
)
1238 free (free_contents
);
1242 static reloc_howto_type
*
1243 ppc_elf_reloc_type_lookup (abfd
, code
)
1244 bfd
*abfd ATTRIBUTE_UNUSED
;
1245 bfd_reloc_code_real_type code
;
1247 enum elf_ppc_reloc_type ppc_reloc
= R_PPC_NONE
;
1249 if (!ppc_elf_howto_table
[R_PPC_ADDR32
])
1250 /* Initialize howto table if needed. */
1251 ppc_elf_howto_init ();
1256 return (reloc_howto_type
*) NULL
;
1258 case BFD_RELOC_NONE
: ppc_reloc
= R_PPC_NONE
; break;
1259 case BFD_RELOC_32
: ppc_reloc
= R_PPC_ADDR32
; break;
1260 case BFD_RELOC_PPC_BA26
: ppc_reloc
= R_PPC_ADDR24
; break;
1261 case BFD_RELOC_16
: ppc_reloc
= R_PPC_ADDR16
; break;
1262 case BFD_RELOC_LO16
: ppc_reloc
= R_PPC_ADDR16_LO
; break;
1263 case BFD_RELOC_HI16
: ppc_reloc
= R_PPC_ADDR16_HI
; break;
1264 case BFD_RELOC_HI16_S
: ppc_reloc
= R_PPC_ADDR16_HA
; break;
1265 case BFD_RELOC_PPC_BA16
: ppc_reloc
= R_PPC_ADDR14
; break;
1266 case BFD_RELOC_PPC_BA16_BRTAKEN
: ppc_reloc
= R_PPC_ADDR14_BRTAKEN
; break;
1267 case BFD_RELOC_PPC_BA16_BRNTAKEN
: ppc_reloc
= R_PPC_ADDR14_BRNTAKEN
; break;
1268 case BFD_RELOC_PPC_B26
: ppc_reloc
= R_PPC_REL24
; break;
1269 case BFD_RELOC_PPC_B16
: ppc_reloc
= R_PPC_REL14
; break;
1270 case BFD_RELOC_PPC_B16_BRTAKEN
: ppc_reloc
= R_PPC_REL14_BRTAKEN
; break;
1271 case BFD_RELOC_PPC_B16_BRNTAKEN
: ppc_reloc
= R_PPC_REL14_BRNTAKEN
; break;
1272 case BFD_RELOC_16_GOTOFF
: ppc_reloc
= R_PPC_GOT16
; break;
1273 case BFD_RELOC_LO16_GOTOFF
: ppc_reloc
= R_PPC_GOT16_LO
; break;
1274 case BFD_RELOC_HI16_GOTOFF
: ppc_reloc
= R_PPC_GOT16_HI
; break;
1275 case BFD_RELOC_HI16_S_GOTOFF
: ppc_reloc
= R_PPC_GOT16_HA
; break;
1276 case BFD_RELOC_24_PLT_PCREL
: ppc_reloc
= R_PPC_PLTREL24
; break;
1277 case BFD_RELOC_PPC_COPY
: ppc_reloc
= R_PPC_COPY
; break;
1278 case BFD_RELOC_PPC_GLOB_DAT
: ppc_reloc
= R_PPC_GLOB_DAT
; break;
1279 case BFD_RELOC_PPC_LOCAL24PC
: ppc_reloc
= R_PPC_LOCAL24PC
; break;
1280 case BFD_RELOC_32_PCREL
: ppc_reloc
= R_PPC_REL32
; break;
1281 case BFD_RELOC_32_PLTOFF
: ppc_reloc
= R_PPC_PLT32
; break;
1282 case BFD_RELOC_32_PLT_PCREL
: ppc_reloc
= R_PPC_PLTREL32
; break;
1283 case BFD_RELOC_LO16_PLTOFF
: ppc_reloc
= R_PPC_PLT16_LO
; break;
1284 case BFD_RELOC_HI16_PLTOFF
: ppc_reloc
= R_PPC_PLT16_HI
; break;
1285 case BFD_RELOC_HI16_S_PLTOFF
: ppc_reloc
= R_PPC_PLT16_HA
; break;
1286 case BFD_RELOC_GPREL16
: ppc_reloc
= R_PPC_SDAREL16
; break;
1287 case BFD_RELOC_32_BASEREL
: ppc_reloc
= R_PPC_SECTOFF
; break;
1288 case BFD_RELOC_LO16_BASEREL
: ppc_reloc
= R_PPC_SECTOFF_LO
; break;
1289 case BFD_RELOC_HI16_BASEREL
: ppc_reloc
= R_PPC_SECTOFF_HI
; break;
1290 case BFD_RELOC_HI16_S_BASEREL
: ppc_reloc
= R_PPC_SECTOFF_HA
; break;
1291 case BFD_RELOC_CTOR
: ppc_reloc
= R_PPC_ADDR32
; break;
1292 case BFD_RELOC_PPC_TOC16
: ppc_reloc
= R_PPC_TOC16
; break;
1293 case BFD_RELOC_PPC_EMB_NADDR32
: ppc_reloc
= R_PPC_EMB_NADDR32
; break;
1294 case BFD_RELOC_PPC_EMB_NADDR16
: ppc_reloc
= R_PPC_EMB_NADDR16
; break;
1295 case BFD_RELOC_PPC_EMB_NADDR16_LO
: ppc_reloc
= R_PPC_EMB_NADDR16_LO
; break;
1296 case BFD_RELOC_PPC_EMB_NADDR16_HI
: ppc_reloc
= R_PPC_EMB_NADDR16_HI
; break;
1297 case BFD_RELOC_PPC_EMB_NADDR16_HA
: ppc_reloc
= R_PPC_EMB_NADDR16_HA
; break;
1298 case BFD_RELOC_PPC_EMB_SDAI16
: ppc_reloc
= R_PPC_EMB_SDAI16
; break;
1299 case BFD_RELOC_PPC_EMB_SDA2I16
: ppc_reloc
= R_PPC_EMB_SDA2I16
; break;
1300 case BFD_RELOC_PPC_EMB_SDA2REL
: ppc_reloc
= R_PPC_EMB_SDA2REL
; break;
1301 case BFD_RELOC_PPC_EMB_SDA21
: ppc_reloc
= R_PPC_EMB_SDA21
; break;
1302 case BFD_RELOC_PPC_EMB_MRKREF
: ppc_reloc
= R_PPC_EMB_MRKREF
; break;
1303 case BFD_RELOC_PPC_EMB_RELSEC16
: ppc_reloc
= R_PPC_EMB_RELSEC16
; break;
1304 case BFD_RELOC_PPC_EMB_RELST_LO
: ppc_reloc
= R_PPC_EMB_RELST_LO
; break;
1305 case BFD_RELOC_PPC_EMB_RELST_HI
: ppc_reloc
= R_PPC_EMB_RELST_HI
; break;
1306 case BFD_RELOC_PPC_EMB_RELST_HA
: ppc_reloc
= R_PPC_EMB_RELST_HA
; break;
1307 case BFD_RELOC_PPC_EMB_BIT_FLD
: ppc_reloc
= R_PPC_EMB_BIT_FLD
; break;
1308 case BFD_RELOC_PPC_EMB_RELSDA
: ppc_reloc
= R_PPC_EMB_RELSDA
; break;
1309 case BFD_RELOC_VTABLE_INHERIT
: ppc_reloc
= R_PPC_GNU_VTINHERIT
; break;
1310 case BFD_RELOC_VTABLE_ENTRY
: ppc_reloc
= R_PPC_GNU_VTENTRY
; break;
1313 return ppc_elf_howto_table
[(int) ppc_reloc
];
1316 /* Set the howto pointer for a PowerPC ELF reloc. */
1319 ppc_elf_info_to_howto (abfd
, cache_ptr
, dst
)
1320 bfd
*abfd ATTRIBUTE_UNUSED
;
1322 Elf32_Internal_Rela
*dst
;
1324 if (!ppc_elf_howto_table
[R_PPC_ADDR32
])
1325 /* Initialize howto table if needed. */
1326 ppc_elf_howto_init ();
1328 BFD_ASSERT (ELF32_R_TYPE (dst
->r_info
) < (unsigned int) R_PPC_max
);
1329 cache_ptr
->howto
= ppc_elf_howto_table
[ELF32_R_TYPE (dst
->r_info
)];
1332 /* Handle the R_PPC_ADDR16_HA reloc. */
1334 static bfd_reloc_status_type
1335 ppc_elf_addr16_ha_reloc (abfd
, reloc_entry
, symbol
, data
, input_section
,
1336 output_bfd
, error_message
)
1337 bfd
*abfd ATTRIBUTE_UNUSED
;
1338 arelent
*reloc_entry
;
1340 PTR data ATTRIBUTE_UNUSED
;
1341 asection
*input_section
;
1343 char **error_message ATTRIBUTE_UNUSED
;
1347 if (output_bfd
!= NULL
)
1349 reloc_entry
->address
+= input_section
->output_offset
;
1350 return bfd_reloc_ok
;
1353 if (reloc_entry
->address
> input_section
->_cooked_size
)
1354 return bfd_reloc_outofrange
;
1356 if (bfd_is_com_section (symbol
->section
))
1359 relocation
= symbol
->value
;
1361 relocation
+= symbol
->section
->output_section
->vma
;
1362 relocation
+= symbol
->section
->output_offset
;
1363 relocation
+= reloc_entry
->addend
;
1365 reloc_entry
->addend
+= (relocation
& 0x8000) << 1;
1367 return bfd_reloc_continue
;
1370 /* Function to set whether a module needs the -mrelocatable bit set. */
1373 ppc_elf_set_private_flags (abfd
, flags
)
1377 BFD_ASSERT (!elf_flags_init (abfd
)
1378 || elf_elfheader (abfd
)->e_flags
== flags
);
1380 elf_elfheader (abfd
)->e_flags
= flags
;
1381 elf_flags_init (abfd
) = true;
1385 /* Copy backend specific data from one object module to another */
1387 ppc_elf_copy_private_bfd_data (ibfd
, obfd
)
1391 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1392 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1395 BFD_ASSERT (!elf_flags_init (obfd
)
1396 || elf_elfheader (obfd
)->e_flags
== elf_elfheader (ibfd
)->e_flags
);
1398 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
1399 elf_flags_init (obfd
) = true;
1403 /* Merge backend specific data from an object file to the output
1404 object file when linking */
1406 ppc_elf_merge_private_bfd_data (ibfd
, obfd
)
1414 /* Check if we have the same endianess */
1415 if (_bfd_generic_verify_endian_match (ibfd
, obfd
) == false)
1418 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1419 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1422 new_flags
= elf_elfheader (ibfd
)->e_flags
;
1423 old_flags
= elf_elfheader (obfd
)->e_flags
;
1424 if (!elf_flags_init (obfd
)) /* First call, no flags set */
1426 elf_flags_init (obfd
) = true;
1427 elf_elfheader (obfd
)->e_flags
= new_flags
;
1430 else if (new_flags
== old_flags
) /* Compatible flags are ok */
1433 else /* Incompatible flags */
1435 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib to be linked
1438 if ((new_flags
& EF_PPC_RELOCATABLE
) != 0
1439 && (old_flags
& (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
)) == 0)
1442 (*_bfd_error_handler
)
1443 (_("%s: compiled with -mrelocatable and linked with modules compiled normally"),
1444 bfd_get_filename (ibfd
));
1446 else if ((new_flags
& (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
)) == 0
1447 && (old_flags
& EF_PPC_RELOCATABLE
) != 0)
1450 (*_bfd_error_handler
)
1451 (_("%s: compiled normally and linked with modules compiled with -mrelocatable"),
1452 bfd_get_filename (ibfd
));
1455 /* The output is -mrelocatable-lib iff both the input files are. */
1456 if (! (new_flags
& EF_PPC_RELOCATABLE_LIB
))
1457 elf_elfheader (obfd
)->e_flags
&= ~EF_PPC_RELOCATABLE_LIB
;
1459 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
1460 but each input file is either -mrelocatable or -mrelocatable-lib. */
1461 if (! (elf_elfheader (obfd
)->e_flags
& EF_PPC_RELOCATABLE_LIB
)
1462 && (new_flags
& (EF_PPC_RELOCATABLE_LIB
| EF_PPC_RELOCATABLE
))
1463 && (old_flags
& (EF_PPC_RELOCATABLE_LIB
| EF_PPC_RELOCATABLE
)))
1464 elf_elfheader (obfd
)->e_flags
|= EF_PPC_RELOCATABLE
;
1466 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if any module uses it */
1467 elf_elfheader (obfd
)->e_flags
|= (new_flags
& EF_PPC_EMB
);
1469 new_flags
&= ~ (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
| EF_PPC_EMB
);
1470 old_flags
&= ~ (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
| EF_PPC_EMB
);
1472 /* Warn about any other mismatches */
1473 if (new_flags
!= old_flags
)
1476 (*_bfd_error_handler
)
1477 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
1478 bfd_get_filename (ibfd
), (long) new_flags
, (long) old_flags
);
1483 bfd_set_error (bfd_error_bad_value
);
1492 /* Handle a PowerPC specific section when reading an object file. This
1493 is called when elfcode.h finds a section with an unknown type. */
1496 ppc_elf_section_from_shdr (abfd
, hdr
, name
)
1498 Elf32_Internal_Shdr
*hdr
;
1504 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1507 newsect
= hdr
->bfd_section
;
1508 flags
= bfd_get_section_flags (abfd
, newsect
);
1509 if (hdr
->sh_flags
& SHF_EXCLUDE
)
1510 flags
|= SEC_EXCLUDE
;
1512 if (hdr
->sh_type
== SHT_ORDERED
)
1513 flags
|= SEC_SORT_ENTRIES
;
1515 bfd_set_section_flags (abfd
, newsect
, flags
);
1520 /* Set up any other section flags and such that may be necessary. */
1523 ppc_elf_fake_sections (abfd
, shdr
, asect
)
1524 bfd
*abfd ATTRIBUTE_UNUSED
;
1525 Elf32_Internal_Shdr
*shdr
;
1528 if ((asect
->flags
& SEC_EXCLUDE
) != 0)
1529 shdr
->sh_flags
|= SHF_EXCLUDE
;
1531 if ((asect
->flags
& SEC_SORT_ENTRIES
) != 0)
1532 shdr
->sh_type
= SHT_ORDERED
;
1538 /* Create a special linker section */
1539 static elf_linker_section_t
*
1540 ppc_elf_create_linker_section (abfd
, info
, which
)
1542 struct bfd_link_info
*info
;
1543 enum elf_linker_section_enum which
;
1545 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
1546 elf_linker_section_t
*lsect
;
1548 /* Record the first bfd section that needs the special section */
1550 dynobj
= elf_hash_table (info
)->dynobj
= abfd
;
1552 /* If this is the first time, create the section */
1553 lsect
= elf_linker_section (dynobj
, which
);
1556 elf_linker_section_t defaults
;
1557 static elf_linker_section_t zero_section
;
1559 defaults
= zero_section
;
1560 defaults
.which
= which
;
1561 defaults
.hole_written_p
= false;
1562 defaults
.alignment
= 2;
1564 /* Both of these sections are (technically) created by the user
1565 putting data in them, so they shouldn't be marked
1568 The linker creates them so it has somewhere to attach their
1569 respective symbols. In fact, if they were empty it would
1570 be OK to leave the symbol set to 0 (or any random number), because
1571 the appropriate register should never be used. */
1572 defaults
.flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
1578 (*_bfd_error_handler
) (_("%s: Unknown special linker type %d"),
1579 bfd_get_filename (abfd
),
1582 bfd_set_error (bfd_error_bad_value
);
1583 return (elf_linker_section_t
*) 0;
1585 case LINKER_SECTION_SDATA
: /* .sdata/.sbss section */
1586 defaults
.name
= ".sdata";
1587 defaults
.rel_name
= ".rela.sdata";
1588 defaults
.bss_name
= ".sbss";
1589 defaults
.sym_name
= "_SDA_BASE_";
1590 defaults
.sym_offset
= 32768;
1593 case LINKER_SECTION_SDATA2
: /* .sdata2/.sbss2 section */
1594 defaults
.name
= ".sdata2";
1595 defaults
.rel_name
= ".rela.sdata2";
1596 defaults
.bss_name
= ".sbss2";
1597 defaults
.sym_name
= "_SDA2_BASE_";
1598 defaults
.sym_offset
= 32768;
1599 defaults
.flags
|= SEC_READONLY
;
1603 lsect
= _bfd_elf_create_linker_section (abfd
, info
, which
, &defaults
);
1609 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
1610 need to bump up the number of section headers. */
1613 ppc_elf_additional_program_headers (abfd
)
1621 s
= bfd_get_section_by_name (abfd
, ".interp");
1625 s
= bfd_get_section_by_name (abfd
, ".sbss2");
1626 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0 && s
->_raw_size
> 0)
1629 s
= bfd_get_section_by_name (abfd
, ".PPC.EMB.sbss0");
1630 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0 && s
->_raw_size
> 0)
1636 /* Modify the segment map if needed. */
1639 ppc_elf_modify_segment_map (abfd
)
1640 bfd
*abfd ATTRIBUTE_UNUSED
;
1645 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
1646 to output sections (just like _bfd_elf_create_dynamic_sections has
1647 to create .dynbss and .rela.bss). */
1650 ppc_elf_create_dynamic_sections (abfd
, info
)
1652 struct bfd_link_info
*info
;
1654 register asection
*s
;
1657 if (!_bfd_elf_create_dynamic_sections (abfd
, info
))
1660 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1661 | SEC_LINKER_CREATED
);
1663 s
= bfd_make_section (abfd
, ".dynsbss");
1665 || ! bfd_set_section_flags (abfd
, s
, SEC_ALLOC
))
1670 s
= bfd_make_section (abfd
, ".rela.sbss");
1672 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
1673 || ! bfd_set_section_alignment (abfd
, s
, 2))
1679 /* Adjust a symbol defined by a dynamic object and referenced by a
1680 regular object. The current definition is in some section of the
1681 dynamic object, but we're not including those sections. We have to
1682 change the definition to something the rest of the link can
1686 ppc_elf_adjust_dynamic_symbol (info
, h
)
1687 struct bfd_link_info
*info
;
1688 struct elf_link_hash_entry
*h
;
1690 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
1692 unsigned int power_of_two
;
1696 fprintf (stderr
, "ppc_elf_adjust_dynamic_symbol called for %s\n", h
->root
.root
.string
);
1699 /* Make sure we know what is going on here. */
1700 BFD_ASSERT (dynobj
!= NULL
1701 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
)
1702 || h
->weakdef
!= NULL
1703 || ((h
->elf_link_hash_flags
1704 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0
1705 && (h
->elf_link_hash_flags
1706 & ELF_LINK_HASH_REF_REGULAR
) != 0
1707 && (h
->elf_link_hash_flags
1708 & ELF_LINK_HASH_DEF_REGULAR
) == 0)));
1710 /* If this is a function, put it in the procedure linkage table. We
1711 will fill in the contents of the procedure linkage table later,
1712 when we know the address of the .got section. */
1713 if (h
->type
== STT_FUNC
1714 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0)
1716 if (! elf_hash_table (info
)->dynamic_sections_created
1717 || SYMBOL_CALLS_LOCAL (info
, h
)
1718 || (info
->shared
&& h
->plt
.refcount
<= 0))
1720 /* A PLT entry is not required/allowed when:
1722 1. We are not using ld.so; because then the PLT entry
1723 can't be set up, so we can't use one.
1725 2. We know for certain that a call to this symbol
1726 will go to this object.
1728 3. GC has rendered the entry unused.
1729 Note, however, that in an executable all references to the
1730 symbol go to the PLT, so we can't turn it off in that case.
1731 ??? The correct thing to do here is to reference count
1732 all uses of the symbol, not just those to the GOT or PLT. */
1733 h
->plt
.offset
= (bfd_vma
) -1;
1734 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1738 /* Make sure this symbol is output as a dynamic symbol. */
1739 if (h
->dynindx
== -1)
1741 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
1744 BFD_ASSERT (h
->dynindx
!= -1);
1746 s
= bfd_get_section_by_name (dynobj
, ".plt");
1747 BFD_ASSERT (s
!= NULL
);
1749 /* If this is the first .plt entry, make room for the special
1751 if (s
->_raw_size
== 0)
1752 s
->_raw_size
+= PLT_INITIAL_ENTRY_SIZE
;
1754 /* The PowerPC PLT is actually composed of two parts, the first part
1755 is 2 words (for a load and a jump), and then there is a remaining
1756 word available at the end. */
1757 plt_offset
= (PLT_INITIAL_ENTRY_SIZE
1759 * ((s
->_raw_size
- PLT_INITIAL_ENTRY_SIZE
)
1760 / PLT_ENTRY_SIZE
)));
1762 /* If this symbol is not defined in a regular file, and we are
1763 not generating a shared library, then set the symbol to this
1764 location in the .plt. This is required to make function
1765 pointers compare as equal between the normal executable and
1766 the shared library. */
1768 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
1770 h
->root
.u
.def
.section
= s
;
1771 h
->root
.u
.def
.value
= plt_offset
;
1774 h
->plt
.offset
= plt_offset
;
1776 /* Make room for this entry. After the 8192nd entry, room
1777 for two entries is allocated. */
1778 if ((s
->_raw_size
- PLT_INITIAL_ENTRY_SIZE
) / PLT_ENTRY_SIZE
1779 >= PLT_NUM_SINGLE_ENTRIES
)
1780 s
->_raw_size
+= 2 * PLT_ENTRY_SIZE
;
1782 s
->_raw_size
+= PLT_ENTRY_SIZE
;
1784 /* We also need to make an entry in the .rela.plt section. */
1785 s
= bfd_get_section_by_name (dynobj
, ".rela.plt");
1786 BFD_ASSERT (s
!= NULL
);
1787 s
->_raw_size
+= sizeof (Elf32_External_Rela
);
1792 /* If this is a weak symbol, and there is a real definition, the
1793 processor independent code will have arranged for us to see the
1794 real definition first, and we can just use the same value. */
1795 if (h
->weakdef
!= NULL
)
1797 BFD_ASSERT (h
->weakdef
->root
.type
== bfd_link_hash_defined
1798 || h
->weakdef
->root
.type
== bfd_link_hash_defweak
);
1799 h
->root
.u
.def
.section
= h
->weakdef
->root
.u
.def
.section
;
1800 h
->root
.u
.def
.value
= h
->weakdef
->root
.u
.def
.value
;
1804 /* This is a reference to a symbol defined by a dynamic object which
1805 is not a function. */
1807 /* If we are creating a shared library, we must presume that the
1808 only references to the symbol are via the global offset table.
1809 For such cases we need not do anything here; the relocations will
1810 be handled correctly by relocate_section. */
1814 /* We must allocate the symbol in our .dynbss section, which will
1815 become part of the .bss section of the executable. There will be
1816 an entry for this symbol in the .dynsym section. The dynamic
1817 object will contain position independent code, so all references
1818 from the dynamic object to this symbol will go through the global
1819 offset table. The dynamic linker will use the .dynsym entry to
1820 determine the address it must put in the global offset table, so
1821 both the dynamic object and the regular object will refer to the
1822 same memory location for the variable.
1824 Of course, if the symbol is sufficiently small, we must instead
1825 allocate it in .sbss. FIXME: It would be better to do this if and
1826 only if there were actually SDAREL relocs for that symbol. */
1828 if (h
->size
<= elf_gp_size (dynobj
))
1829 s
= bfd_get_section_by_name (dynobj
, ".dynsbss");
1831 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
1832 BFD_ASSERT (s
!= NULL
);
1834 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
1835 copy the initial value out of the dynamic object and into the
1836 runtime process image. We need to remember the offset into the
1837 .rela.bss section we are going to use. */
1838 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1842 if (h
->size
<= elf_gp_size (dynobj
))
1843 srel
= bfd_get_section_by_name (dynobj
, ".rela.sbss");
1845 srel
= bfd_get_section_by_name (dynobj
, ".rela.bss");
1846 BFD_ASSERT (srel
!= NULL
);
1847 srel
->_raw_size
+= sizeof (Elf32_External_Rela
);
1848 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_COPY
;
1851 /* We need to figure out the alignment required for this symbol. I
1852 have no idea how ELF linkers handle this. */
1853 power_of_two
= bfd_log2 (h
->size
);
1854 if (power_of_two
> 4)
1857 /* Apply the required alignment. */
1858 s
->_raw_size
= BFD_ALIGN (s
->_raw_size
,
1859 (bfd_size_type
) (1 << power_of_two
));
1860 if (power_of_two
> bfd_get_section_alignment (dynobj
, s
))
1862 if (! bfd_set_section_alignment (dynobj
, s
, power_of_two
))
1866 /* Define the symbol as being at this point in the section. */
1867 h
->root
.u
.def
.section
= s
;
1868 h
->root
.u
.def
.value
= s
->_raw_size
;
1870 /* Increment the section size to make room for the symbol. */
1871 s
->_raw_size
+= h
->size
;
1876 /* Set the sizes of the dynamic sections. */
1879 ppc_elf_size_dynamic_sections (output_bfd
, info
)
1881 struct bfd_link_info
*info
;
1890 fprintf (stderr
, "ppc_elf_size_dynamic_sections called\n");
1893 dynobj
= elf_hash_table (info
)->dynobj
;
1894 BFD_ASSERT (dynobj
!= NULL
);
1896 if (elf_hash_table (info
)->dynamic_sections_created
)
1898 /* Set the contents of the .interp section to the interpreter. */
1901 s
= bfd_get_section_by_name (dynobj
, ".interp");
1902 BFD_ASSERT (s
!= NULL
);
1903 s
->_raw_size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1904 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1909 /* We may have created entries in the .rela.got, .rela.sdata, and
1910 .rela.sdata2 sections. However, if we are not creating the
1911 dynamic sections, we will not actually use these entries. Reset
1912 the size of .rela.got, et al, which will cause it to get
1913 stripped from the output file below. */
1914 static char *rela_sections
[] = { ".rela.got", ".rela.sdata",
1915 ".rela.sdata2", ".rela.sbss",
1919 for (p
= rela_sections
; *p
!= (char *) 0; p
++)
1921 s
= bfd_get_section_by_name (dynobj
, *p
);
1927 /* The check_relocs and adjust_dynamic_symbol entry points have
1928 determined the sizes of the various dynamic sections. Allocate
1933 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1938 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1941 /* It's OK to base decisions on the section name, because none
1942 of the dynobj section names depend upon the input files. */
1943 name
= bfd_get_section_name (dynobj
, s
);
1947 if (strcmp (name
, ".plt") == 0)
1949 if (s
->_raw_size
== 0)
1951 /* Strip this section if we don't need it; see the
1957 /* Remember whether there is a PLT. */
1961 else if (strncmp (name
, ".rela", 5) == 0)
1963 if (s
->_raw_size
== 0)
1965 /* If we don't need this section, strip it from the
1966 output file. This is mostly to handle .rela.bss and
1967 .rela.plt. We must create both sections in
1968 create_dynamic_sections, because they must be created
1969 before the linker maps input sections to output
1970 sections. The linker does that before
1971 adjust_dynamic_symbol is called, and it is that
1972 function which decides whether anything needs to go
1973 into these sections. */
1979 const char *outname
;
1981 /* Remember whether there are any relocation sections. */
1984 /* If this relocation section applies to a read only
1985 section, then we probably need a DT_TEXTREL entry. */
1986 outname
= bfd_get_section_name (output_bfd
,
1988 target
= bfd_get_section_by_name (output_bfd
, outname
+ 5);
1990 && (target
->flags
& SEC_READONLY
) != 0
1991 && (target
->flags
& SEC_ALLOC
) != 0)
1994 /* We use the reloc_count field as a counter if we need
1995 to copy relocs into the output file. */
1999 else if (strcmp (name
, ".got") != 0
2000 && strcmp (name
, ".sdata") != 0
2001 && strcmp (name
, ".sdata2") != 0)
2003 /* It's not one of our sections, so don't allocate space. */
2009 _bfd_strip_section_from_output (info
, s
);
2013 /* Allocate memory for the section contents. */
2014 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->_raw_size
);
2015 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
2019 if (elf_hash_table (info
)->dynamic_sections_created
)
2021 /* Add some entries to the .dynamic section. We fill in the
2022 values later, in ppc_elf_finish_dynamic_sections, but we
2023 must add the entries now so that we get the correct size for
2024 the .dynamic section. The DT_DEBUG entry is filled in by the
2025 dynamic linker and used by the debugger. */
2028 if (! bfd_elf32_add_dynamic_entry (info
, DT_DEBUG
, 0))
2034 if (! bfd_elf32_add_dynamic_entry (info
, DT_PLTGOT
, 0)
2035 || ! bfd_elf32_add_dynamic_entry (info
, DT_PLTRELSZ
, 0)
2036 || ! bfd_elf32_add_dynamic_entry (info
, DT_PLTREL
, DT_RELA
)
2037 || ! bfd_elf32_add_dynamic_entry (info
, DT_JMPREL
, 0))
2043 if (! bfd_elf32_add_dynamic_entry (info
, DT_RELA
, 0)
2044 || ! bfd_elf32_add_dynamic_entry (info
, DT_RELASZ
, 0)
2045 || ! bfd_elf32_add_dynamic_entry (info
, DT_RELAENT
,
2046 sizeof (Elf32_External_Rela
)))
2052 if (! bfd_elf32_add_dynamic_entry (info
, DT_TEXTREL
, 0))
2054 info
->flags
|= DF_TEXTREL
;
2062 /* Look through the relocs for a section during the first phase, and
2063 allocate space in the global offset table or procedure linkage
2067 ppc_elf_check_relocs (abfd
, info
, sec
, relocs
)
2069 struct bfd_link_info
*info
;
2071 const Elf_Internal_Rela
*relocs
;
2074 Elf_Internal_Shdr
*symtab_hdr
;
2075 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
2076 const Elf_Internal_Rela
*rel
;
2077 const Elf_Internal_Rela
*rel_end
;
2078 bfd_signed_vma
*local_got_refcounts
;
2079 elf_linker_section_t
*sdata
;
2080 elf_linker_section_t
*sdata2
;
2082 asection
*sgot
= NULL
;
2083 asection
*srelgot
= NULL
;
2085 if (info
->relocateable
)
2089 fprintf (stderr
, "ppc_elf_check_relocs called for section %s in %s\n",
2090 bfd_get_section_name (abfd
, sec
),
2091 bfd_get_filename (abfd
));
2094 /* Create the linker generated sections all the time so that the
2095 special symbols are created. */
2097 if ((sdata
= elf_linker_section (abfd
, LINKER_SECTION_SDATA
)) == NULL
)
2099 sdata
= ppc_elf_create_linker_section (abfd
, info
, LINKER_SECTION_SDATA
);
2104 if ((sdata2
= elf_linker_section (abfd
, LINKER_SECTION_SDATA2
)) == NULL
)
2106 sdata2
= ppc_elf_create_linker_section (abfd
, info
, LINKER_SECTION_SDATA2
);
2111 dynobj
= elf_hash_table (info
)->dynobj
;
2112 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2113 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2115 sym_hashes
= elf_sym_hashes (abfd
);
2116 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof (Elf32_External_Sym
);
2117 if (!elf_bad_symtab (abfd
))
2118 sym_hashes_end
-= symtab_hdr
->sh_info
;
2122 rel_end
= relocs
+ sec
->reloc_count
;
2123 for (rel
= relocs
; rel
< rel_end
; rel
++)
2125 unsigned long r_symndx
;
2126 struct elf_link_hash_entry
*h
;
2128 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2129 if (r_symndx
< symtab_hdr
->sh_info
)
2132 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2134 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
2135 This shows up in particular in an R_PPC_ADDR32 in the eabi
2137 if (h
&& strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
2142 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
2143 if (! _bfd_elf_create_got_section (dynobj
, info
))
2145 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2146 BFD_ASSERT (sgot
!= NULL
);
2150 switch (ELF32_R_TYPE (rel
->r_info
))
2152 /* GOT16 relocations */
2154 case R_PPC_GOT16_LO
:
2155 case R_PPC_GOT16_HI
:
2156 case R_PPC_GOT16_HA
:
2157 /* This symbol requires a global offset table entry. */
2162 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
2163 if (! _bfd_elf_create_got_section (dynobj
, info
))
2165 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2166 BFD_ASSERT (sgot
!= NULL
);
2170 && (h
!= NULL
|| info
->shared
))
2172 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
2173 if (srelgot
== NULL
)
2175 srelgot
= bfd_make_section (dynobj
, ".rela.got");
2177 || ! bfd_set_section_flags (dynobj
, srelgot
,
2182 | SEC_LINKER_CREATED
2184 || ! bfd_set_section_alignment (dynobj
, srelgot
, 2))
2191 if (h
->got
.refcount
== -1)
2193 /* Make sure this symbol is output as a dynamic symbol. */
2194 if (h
->dynindx
== -1)
2195 if (!bfd_elf32_link_record_dynamic_symbol (info
, h
))
2198 /* Allocate space in the .got. */
2199 sgot
->_raw_size
+= 4;
2200 /* Allocate relocation space. */
2201 srelgot
->_raw_size
+= sizeof (Elf32_External_Rela
);
2203 h
->got
.refcount
= 1;
2210 /* This is a global offset table entry for a local symbol. */
2211 if (local_got_refcounts
== NULL
)
2215 size
= symtab_hdr
->sh_info
* sizeof (bfd_signed_vma
);
2216 local_got_refcounts
= (bfd_signed_vma
*)
2217 bfd_alloc (abfd
, size
);
2218 if (local_got_refcounts
== NULL
)
2220 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2221 memset (local_got_refcounts
, -1, size
);
2223 if (local_got_refcounts
[r_symndx
] == -1)
2225 sgot
->_raw_size
+= 4;
2227 /* If we are generating a shared object, we need to
2228 output a R_PPC_RELATIVE reloc so that the
2229 dynamic linker can adjust this GOT entry. */
2231 srelgot
->_raw_size
+= sizeof (Elf32_External_Rela
);
2233 local_got_refcounts
[r_symndx
] = 1;
2236 local_got_refcounts
[r_symndx
]++;
2240 /* Indirect .sdata relocation */
2241 case R_PPC_EMB_SDAI16
:
2244 ((*_bfd_error_handler
)
2245 (_("%s: relocation %s cannot be used when making a shared object"),
2246 bfd_get_filename (abfd
), "R_PPC_EMB_SDAI16"));
2250 if (srelgot
== NULL
&& (h
!= NULL
|| info
->shared
))
2252 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
2253 if (srelgot
== NULL
)
2255 srelgot
= bfd_make_section (dynobj
, ".rela.got");
2257 || ! bfd_set_section_flags (dynobj
, srelgot
,
2262 | SEC_LINKER_CREATED
2264 || ! bfd_set_section_alignment (dynobj
, srelgot
, 2))
2269 if (!bfd_elf32_create_pointer_linker_section (abfd
, info
, sdata
, h
, rel
))
2274 /* Indirect .sdata2 relocation */
2275 case R_PPC_EMB_SDA2I16
:
2278 ((*_bfd_error_handler
)
2279 (_("%s: relocation %s cannot be used when making a shared object"),
2280 bfd_get_filename (abfd
), "R_PPC_EMB_SDA2I16"));
2284 if (srelgot
== NULL
&& (h
!= NULL
|| info
->shared
))
2286 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
2287 if (srelgot
== NULL
)
2289 srelgot
= bfd_make_section (dynobj
, ".rela.got");
2291 || ! bfd_set_section_flags (dynobj
, srelgot
,
2296 | SEC_LINKER_CREATED
2298 || ! bfd_set_section_alignment (dynobj
, srelgot
, 2))
2303 if (!bfd_elf32_create_pointer_linker_section (abfd
, info
, sdata2
, h
, rel
))
2308 case R_PPC_SDAREL16
:
2309 case R_PPC_EMB_SDA2REL
:
2310 case R_PPC_EMB_SDA21
:
2313 ((*_bfd_error_handler
)
2314 (_("%s: relocation %s cannot be used when making a shared object"),
2315 bfd_get_filename (abfd
),
2316 ppc_elf_howto_table
[(int) ELF32_R_TYPE (rel
->r_info
)]->name
));
2322 case R_PPC_PLTREL24
:
2323 case R_PPC_PLT16_LO
:
2324 case R_PPC_PLT16_HI
:
2325 case R_PPC_PLT16_HA
:
2327 fprintf (stderr
, "Reloc requires a PLT entry\n");
2329 /* This symbol requires a procedure linkage table entry. We
2330 actually build the entry in adjust_dynamic_symbol,
2331 because this might be a case of linking PIC code without
2332 linking in any dynamic objects, in which case we don't
2333 need to generate a procedure linkage table after all. */
2337 /* It does not make sense to have a procedure linkage
2338 table entry for a local symbol. */
2339 bfd_set_error (bfd_error_bad_value
);
2343 /* Make sure this symbol is output as a dynamic symbol. */
2344 if (h
->dynindx
== -1)
2346 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
2349 if (h
->plt
.refcount
== -1)
2351 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
2352 h
->plt
.refcount
= 1;
2358 /* The following relocations don't need to propagate the
2359 relocation if linking a shared object since they are
2360 section relative. */
2362 case R_PPC_SECTOFF_LO
:
2363 case R_PPC_SECTOFF_HI
:
2364 case R_PPC_SECTOFF_HA
:
2367 /* This refers only to functions defined in the shared library */
2368 case R_PPC_LOCAL24PC
:
2371 /* This relocation describes the C++ object vtable hierarchy.
2372 Reconstruct it for later use during GC. */
2373 case R_PPC_GNU_VTINHERIT
:
2374 if (!_bfd_elf32_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2378 /* This relocation describes which C++ vtable entries are actually
2379 used. Record for later use during GC. */
2380 case R_PPC_GNU_VTENTRY
:
2381 if (!_bfd_elf32_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2385 /* When creating a shared object, we must copy these
2386 relocs into the output file. We create a reloc
2387 section in dynobj and make room for the reloc. */
2390 case R_PPC_REL14_BRTAKEN
:
2391 case R_PPC_REL14_BRNTAKEN
:
2394 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
2395 || SYMBOL_REFERENCES_LOCAL (info
, h
))
2403 fprintf (stderr
, "ppc_elf_check_relocs need to create relocation for %s\n",
2404 (h
&& h
->root
.root
.string
) ? h
->root
.root
.string
: "<unknown>");
2410 name
= (bfd_elf_string_from_elf_section
2412 elf_elfheader (abfd
)->e_shstrndx
,
2413 elf_section_data (sec
)->rel_hdr
.sh_name
));
2417 BFD_ASSERT (strncmp (name
, ".rela", 5) == 0
2418 && strcmp (bfd_get_section_name (abfd
, sec
),
2421 sreloc
= bfd_get_section_by_name (dynobj
, name
);
2426 sreloc
= bfd_make_section (dynobj
, name
);
2427 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
2428 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
2429 if ((sec
->flags
& SEC_ALLOC
) != 0)
2430 flags
|= SEC_ALLOC
| SEC_LOAD
;
2432 || ! bfd_set_section_flags (dynobj
, sreloc
, flags
)
2433 || ! bfd_set_section_alignment (dynobj
, sreloc
, 2))
2438 sreloc
->_raw_size
+= sizeof (Elf32_External_Rela
);
2440 /* FIXME: We should here do what the m68k and i386
2441 backends do: if the reloc is pc-relative, record it
2442 in case it turns out that the reloc is unnecessary
2443 because the symbol is forced local by versioning or
2444 we are linking with -Bdynamic. Fortunately this
2445 case is not frequent. */
2455 /* Return the section that should be marked against GC for a given
2459 ppc_elf_gc_mark_hook (abfd
, info
, rel
, h
, sym
)
2461 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2462 Elf_Internal_Rela
*rel
;
2463 struct elf_link_hash_entry
*h
;
2464 Elf_Internal_Sym
*sym
;
2468 switch (ELF32_R_TYPE (rel
->r_info
))
2470 case R_PPC_GNU_VTINHERIT
:
2471 case R_PPC_GNU_VTENTRY
:
2475 switch (h
->root
.type
)
2477 case bfd_link_hash_defined
:
2478 case bfd_link_hash_defweak
:
2479 return h
->root
.u
.def
.section
;
2481 case bfd_link_hash_common
:
2482 return h
->root
.u
.c
.p
->section
;
2491 if (!(elf_bad_symtab (abfd
)
2492 && ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
2493 && ! ((sym
->st_shndx
<= 0 || sym
->st_shndx
>= SHN_LORESERVE
)
2494 && sym
->st_shndx
!= SHN_COMMON
))
2496 return bfd_section_from_elf_index (abfd
, sym
->st_shndx
);
2503 /* Update the got entry reference counts for the section being removed. */
2506 ppc_elf_gc_sweep_hook (abfd
, info
, sec
, relocs
)
2508 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2510 const Elf_Internal_Rela
*relocs
;
2512 Elf_Internal_Shdr
*symtab_hdr
;
2513 struct elf_link_hash_entry
**sym_hashes
;
2514 bfd_signed_vma
*local_got_refcounts
;
2515 const Elf_Internal_Rela
*rel
, *relend
;
2516 unsigned long r_symndx
;
2517 struct elf_link_hash_entry
*h
;
2519 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2520 sym_hashes
= elf_sym_hashes (abfd
);
2521 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2523 relend
= relocs
+ sec
->reloc_count
;
2524 for (rel
= relocs
; rel
< relend
; rel
++)
2525 switch (ELF32_R_TYPE (rel
->r_info
))
2528 case R_PPC_GOT16_LO
:
2529 case R_PPC_GOT16_HI
:
2530 case R_PPC_GOT16_HA
:
2531 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2532 if (r_symndx
>= symtab_hdr
->sh_info
)
2534 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2535 if (h
->got
.refcount
> 0)
2538 else if (local_got_refcounts
!= NULL
)
2540 if (local_got_refcounts
[r_symndx
] > 0)
2541 local_got_refcounts
[r_symndx
]--;
2546 case R_PPC_PLTREL24
:
2547 case R_PPC_PLT16_LO
:
2548 case R_PPC_PLT16_HI
:
2549 case R_PPC_PLT16_HA
:
2550 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2551 if (r_symndx
>= symtab_hdr
->sh_info
)
2553 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2554 if (h
->plt
.refcount
> 0)
2566 /* Hook called by the linker routine which adds symbols from an object
2567 file. We use it to put .comm items in .sbss, and not .bss. */
2570 ppc_elf_add_symbol_hook (abfd
, info
, sym
, namep
, flagsp
, secp
, valp
)
2572 struct bfd_link_info
*info
;
2573 const Elf_Internal_Sym
*sym
;
2574 const char **namep ATTRIBUTE_UNUSED
;
2575 flagword
*flagsp ATTRIBUTE_UNUSED
;
2579 if (sym
->st_shndx
== SHN_COMMON
2580 && !info
->relocateable
2581 && sym
->st_size
<= (bfd_vma
) bfd_get_gp_size (abfd
))
2583 /* Common symbols less than or equal to -G nn bytes are automatically
2585 elf_linker_section_t
*sdata
2586 = ppc_elf_create_linker_section (abfd
, info
, LINKER_SECTION_SDATA
);
2588 if (!sdata
->bss_section
)
2590 /* We don't go through bfd_make_section, because we don't
2591 want to attach this common section to DYNOBJ. The linker
2592 will move the symbols to the appropriate output section
2593 when it defines common symbols. */
2594 sdata
->bss_section
= ((asection
*)
2595 bfd_zalloc (abfd
, sizeof (asection
)));
2596 if (sdata
->bss_section
== NULL
)
2598 sdata
->bss_section
->name
= sdata
->bss_name
;
2599 sdata
->bss_section
->flags
= SEC_IS_COMMON
;
2600 sdata
->bss_section
->output_section
= sdata
->bss_section
;
2601 sdata
->bss_section
->symbol
=
2602 (asymbol
*) bfd_zalloc (abfd
, sizeof (asymbol
));
2603 sdata
->bss_section
->symbol_ptr_ptr
=
2604 (asymbol
**) bfd_zalloc (abfd
, sizeof (asymbol
*));
2605 if (sdata
->bss_section
->symbol
== NULL
2606 || sdata
->bss_section
->symbol_ptr_ptr
== NULL
)
2608 sdata
->bss_section
->symbol
->name
= sdata
->bss_name
;
2609 sdata
->bss_section
->symbol
->flags
= BSF_SECTION_SYM
;
2610 sdata
->bss_section
->symbol
->section
= sdata
->bss_section
;
2611 *sdata
->bss_section
->symbol_ptr_ptr
= sdata
->bss_section
->symbol
;
2614 *secp
= sdata
->bss_section
;
2615 *valp
= sym
->st_size
;
2621 /* Finish up dynamic symbol handling. We set the contents of various
2622 dynamic sections here. */
2625 ppc_elf_finish_dynamic_symbol (output_bfd
, info
, h
, sym
)
2627 struct bfd_link_info
*info
;
2628 struct elf_link_hash_entry
*h
;
2629 Elf_Internal_Sym
*sym
;
2634 fprintf (stderr
, "ppc_elf_finish_dynamic_symbol called for %s",
2635 h
->root
.root
.string
);
2638 dynobj
= elf_hash_table (info
)->dynobj
;
2639 BFD_ASSERT (dynobj
!= NULL
);
2641 if (h
->plt
.offset
!= (bfd_vma
) -1)
2645 Elf_Internal_Rela rela
;
2646 bfd_vma reloc_index
;
2649 fprintf (stderr
, ", plt_offset = %d", h
->plt
.offset
);
2652 /* This symbol has an entry in the procedure linkage table. Set
2655 BFD_ASSERT (h
->dynindx
!= -1);
2657 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2658 srela
= bfd_get_section_by_name (dynobj
, ".rela.plt");
2659 BFD_ASSERT (splt
!= NULL
&& srela
!= NULL
);
2661 /* We don't need to fill in the .plt. The ppc dynamic linker
2664 /* Fill in the entry in the .rela.plt section. */
2665 rela
.r_offset
= (splt
->output_section
->vma
2666 + splt
->output_offset
2668 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_PPC_JMP_SLOT
);
2671 reloc_index
= (h
->plt
.offset
- PLT_INITIAL_ENTRY_SIZE
) / PLT_SLOT_SIZE
;
2672 if (reloc_index
> PLT_NUM_SINGLE_ENTRIES
)
2673 reloc_index
-= (reloc_index
- PLT_NUM_SINGLE_ENTRIES
) / 2;
2674 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
2675 ((Elf32_External_Rela
*) srela
->contents
2678 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2680 /* Mark the symbol as undefined, rather than as defined in
2681 the .plt section. Leave the value alone. */
2682 sym
->st_shndx
= SHN_UNDEF
;
2683 /* If the symbol is weak, we do need to clear the value.
2684 Otherwise, the PLT entry would provide a definition for
2685 the symbol even if the symbol wasn't defined anywhere,
2686 and so the symbol would never be NULL. */
2687 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR_NONWEAK
)
2693 if (h
->got
.offset
!= (bfd_vma
) -1)
2697 Elf_Internal_Rela rela
;
2699 /* This symbol has an entry in the global offset table. Set it
2702 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2703 srela
= bfd_get_section_by_name (dynobj
, ".rela.got");
2704 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
2706 rela
.r_offset
= (sgot
->output_section
->vma
2707 + sgot
->output_offset
2708 + (h
->got
.offset
&~ 1));
2710 /* If this is a -Bsymbolic link, and the symbol is defined
2711 locally, we just want to emit a RELATIVE reloc. The entry in
2712 the global offset table will already have been initialized in
2713 the relocate_section function. */
2715 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2717 rela
.r_info
= ELF32_R_INFO (0, R_PPC_RELATIVE
);
2718 rela
.r_addend
= (h
->root
.u
.def
.value
2719 + h
->root
.u
.def
.section
->output_section
->vma
2720 + h
->root
.u
.def
.section
->output_offset
);
2724 BFD_ASSERT ((h
->got
.offset
& 1) == 0);
2725 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ h
->got
.offset
);
2726 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_PPC_GLOB_DAT
);
2730 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
2731 ((Elf32_External_Rela
*) srela
->contents
2732 + srela
->reloc_count
));
2733 ++srela
->reloc_count
;
2736 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_COPY
) != 0)
2739 Elf_Internal_Rela rela
;
2741 /* This symbols needs a copy reloc. Set it up. */
2744 fprintf (stderr
, ", copy");
2747 BFD_ASSERT (h
->dynindx
!= -1);
2749 if (h
->size
<= elf_gp_size (dynobj
))
2750 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
2753 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
2755 BFD_ASSERT (s
!= NULL
);
2757 rela
.r_offset
= (h
->root
.u
.def
.value
2758 + h
->root
.u
.def
.section
->output_section
->vma
2759 + h
->root
.u
.def
.section
->output_offset
);
2760 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_PPC_COPY
);
2762 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
2763 ((Elf32_External_Rela
*) s
->contents
2769 fprintf (stderr
, "\n");
2772 /* Mark some specially defined symbols as absolute. */
2773 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
2774 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
2775 || strcmp (h
->root
.root
.string
, "_PROCEDURE_LINKAGE_TABLE_") == 0)
2776 sym
->st_shndx
= SHN_ABS
;
2781 /* Finish up the dynamic sections. */
2784 ppc_elf_finish_dynamic_sections (output_bfd
, info
)
2786 struct bfd_link_info
*info
;
2789 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
2790 asection
*sgot
= bfd_get_section_by_name (dynobj
, ".got");
2793 fprintf (stderr
, "ppc_elf_finish_dynamic_sections called\n");
2796 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
2798 if (elf_hash_table (info
)->dynamic_sections_created
)
2801 Elf32_External_Dyn
*dyncon
, *dynconend
;
2803 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2804 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
2806 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
2807 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->_raw_size
);
2808 for (; dyncon
< dynconend
; dyncon
++)
2810 Elf_Internal_Dyn dyn
;
2814 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
2818 case DT_PLTGOT
: name
= ".plt"; size
= false; break;
2819 case DT_PLTRELSZ
: name
= ".rela.plt"; size
= true; break;
2820 case DT_JMPREL
: name
= ".rela.plt"; size
= false; break;
2821 default: name
= NULL
; size
= false; break;
2828 s
= bfd_get_section_by_name (output_bfd
, name
);
2834 dyn
.d_un
.d_ptr
= s
->vma
;
2837 if (s
->_cooked_size
!= 0)
2838 dyn
.d_un
.d_val
= s
->_cooked_size
;
2840 dyn
.d_un
.d_val
= s
->_raw_size
;
2843 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2848 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
2849 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
2852 unsigned char *contents
= sgot
->contents
;
2853 bfd_put_32 (output_bfd
, 0x4e800021 /* blrl */, contents
);
2856 bfd_put_32 (output_bfd
, (bfd_vma
) 0, contents
+4);
2858 bfd_put_32 (output_bfd
,
2859 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
2862 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
2868 /* The RELOCATE_SECTION function is called by the ELF backend linker
2869 to handle the relocations for a section.
2871 The relocs are always passed as Rela structures; if the section
2872 actually uses Rel structures, the r_addend field will always be
2875 This function is responsible for adjust the section contents as
2876 necessary, and (if using Rela relocs and generating a
2877 relocateable output file) adjusting the reloc addend as
2880 This function does not have to worry about setting the reloc
2881 address or the reloc symbol index.
2883 LOCAL_SYMS is a pointer to the swapped in local symbols.
2885 LOCAL_SECTIONS is an array giving the section in the input file
2886 corresponding to the st_shndx field of each local symbol.
2888 The global hash table entry for the global symbols can be found
2889 via elf_sym_hashes (input_bfd).
2891 When generating relocateable output, this function must handle
2892 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2893 going to be the section symbol corresponding to the output
2894 section, which means that the addend must be adjusted
2898 ppc_elf_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
2899 contents
, relocs
, local_syms
, local_sections
)
2901 struct bfd_link_info
*info
;
2903 asection
*input_section
;
2905 Elf_Internal_Rela
*relocs
;
2906 Elf_Internal_Sym
*local_syms
;
2907 asection
**local_sections
;
2909 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2910 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
2911 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
2912 elf_linker_section_t
*sdata
= (dynobj
) ? elf_linker_section (dynobj
, LINKER_SECTION_SDATA
) : NULL
;
2913 elf_linker_section_t
*sdata2
= (dynobj
) ? elf_linker_section (dynobj
, LINKER_SECTION_SDATA2
) : NULL
;
2914 Elf_Internal_Rela
*rel
= relocs
;
2915 Elf_Internal_Rela
*relend
= relocs
+ input_section
->reloc_count
;
2916 asection
*sreloc
= NULL
;
2919 bfd_vma
*local_got_offsets
;
2924 fprintf (stderr
, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n",
2925 bfd_get_filename (input_bfd
),
2926 bfd_section_name(input_bfd
, input_section
),
2927 (long) input_section
->reloc_count
,
2928 (info
->relocateable
) ? " (relocatable)" : "");
2931 if (!ppc_elf_howto_table
[R_PPC_ADDR32
])
2932 /* Initialize howto table if needed. */
2933 ppc_elf_howto_init ();
2935 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2940 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2941 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2944 for (; rel
< relend
; rel
++)
2946 enum elf_ppc_reloc_type r_type
= (enum elf_ppc_reloc_type
)ELF32_R_TYPE (rel
->r_info
);
2947 bfd_vma offset
= rel
->r_offset
;
2948 bfd_vma addend
= rel
->r_addend
;
2949 bfd_reloc_status_type r
= bfd_reloc_other
;
2950 Elf_Internal_Sym
*sym
= (Elf_Internal_Sym
*) 0;
2951 asection
*sec
= (asection
*) 0;
2952 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) 0;
2953 const char *sym_name
= (const char *) 0;
2954 reloc_howto_type
*howto
;
2955 unsigned long r_symndx
;
2957 int will_become_local
;
2959 /* Unknown relocation handling */
2960 if ((unsigned) r_type
>= (unsigned) R_PPC_max
2961 || !ppc_elf_howto_table
[(int) r_type
])
2963 (*_bfd_error_handler
) (_("%s: unknown relocation type %d"),
2964 bfd_get_filename (input_bfd
),
2967 bfd_set_error (bfd_error_bad_value
);
2972 howto
= ppc_elf_howto_table
[(int) r_type
];
2973 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2975 if (info
->relocateable
)
2977 /* This is a relocateable link. We don't have to change
2978 anything, unless the reloc is against a section symbol,
2979 in which case we have to adjust according to where the
2980 section symbol winds up in the output section. */
2981 if (r_symndx
< symtab_hdr
->sh_info
)
2983 sym
= local_syms
+ r_symndx
;
2984 if ((unsigned) ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
2986 sec
= local_sections
[r_symndx
];
2987 addend
= rel
->r_addend
+= sec
->output_offset
+ sym
->st_value
;
2992 fprintf (stderr
, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
3002 /* This is a final link. */
3003 if (r_symndx
< symtab_hdr
->sh_info
)
3005 sym
= local_syms
+ r_symndx
;
3006 sec
= local_sections
[r_symndx
];
3007 sym_name
= "<local symbol>";
3009 relocation
= (sec
->output_section
->vma
3010 + sec
->output_offset
3012 /* Relocs to local symbols are always resolved. */
3013 will_become_local
= 1;
3017 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3018 while (h
->root
.type
== bfd_link_hash_indirect
3019 || h
->root
.type
== bfd_link_hash_warning
)
3020 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3021 sym_name
= h
->root
.root
.string
;
3023 /* Can this relocation be resolved immediately? */
3024 will_become_local
= SYMBOL_REFERENCES_LOCAL (info
, h
);
3026 if (h
->root
.type
== bfd_link_hash_defined
3027 || h
->root
.type
== bfd_link_hash_defweak
)
3029 sec
= h
->root
.u
.def
.section
;
3030 if (((r_type
== R_PPC_PLT32
3031 || r_type
== R_PPC_PLTREL24
)
3033 && h
->plt
.offset
!= (bfd_vma
) -1)
3034 || (r_type
== R_PPC_LOCAL24PC
3035 && sec
->output_section
== NULL
)
3036 || ((r_type
== R_PPC_GOT16
3037 || r_type
== R_PPC_GOT16_LO
3038 || r_type
== R_PPC_GOT16_HI
3039 || r_type
== R_PPC_GOT16_HA
)
3040 && elf_hash_table (info
)->dynamic_sections_created
3041 && (! info
->shared
|| ! will_become_local
))
3043 && ! will_become_local
3044 && ((input_section
->flags
& SEC_ALLOC
) != 0
3045 /* Testing SEC_DEBUGGING here may be wrong.
3046 It's here to avoid a crash when
3047 generating a shared library with DWARF
3048 debugging information. */
3049 || ((input_section
->flags
& SEC_DEBUGGING
) != 0
3050 && (h
->elf_link_hash_flags
3051 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0))
3052 && (r_type
== R_PPC_ADDR32
3053 || r_type
== R_PPC_ADDR24
3054 || r_type
== R_PPC_ADDR16
3055 || r_type
== R_PPC_ADDR16_LO
3056 || r_type
== R_PPC_ADDR16_HI
3057 || r_type
== R_PPC_ADDR16_HA
3058 || r_type
== R_PPC_ADDR14
3059 || r_type
== R_PPC_ADDR14_BRTAKEN
3060 || r_type
== R_PPC_ADDR14_BRNTAKEN
3061 || r_type
== R_PPC_COPY
3062 || r_type
== R_PPC_GLOB_DAT
3063 || r_type
== R_PPC_JMP_SLOT
3064 || r_type
== R_PPC_UADDR32
3065 || r_type
== R_PPC_UADDR16
3066 || r_type
== R_PPC_SDAREL16
3067 || r_type
== R_PPC_EMB_NADDR32
3068 || r_type
== R_PPC_EMB_NADDR16
3069 || r_type
== R_PPC_EMB_NADDR16_LO
3070 || r_type
== R_PPC_EMB_NADDR16_HI
3071 || r_type
== R_PPC_EMB_NADDR16_HA
3072 || r_type
== R_PPC_EMB_SDAI16
3073 || r_type
== R_PPC_EMB_SDA2I16
3074 || r_type
== R_PPC_EMB_SDA2REL
3075 || r_type
== R_PPC_EMB_SDA21
3076 || r_type
== R_PPC_EMB_MRKREF
3077 || r_type
== R_PPC_EMB_BIT_FLD
3078 || r_type
== R_PPC_EMB_RELSDA
3079 || ((r_type
== R_PPC_REL24
3080 || r_type
== R_PPC_REL32
3081 || r_type
== R_PPC_REL14
3082 || r_type
== R_PPC_REL14_BRTAKEN
3083 || r_type
== R_PPC_REL14_BRNTAKEN
3084 || r_type
== R_PPC_RELATIVE
)
3085 && strcmp (h
->root
.root
.string
,
3086 "_GLOBAL_OFFSET_TABLE_") != 0))))
3088 /* In these cases, we don't need the relocation
3089 value. We check specially because in some
3090 obscure cases sec->output_section will be NULL. */
3093 else if (sec
->output_section
== NULL
)
3095 (*_bfd_error_handler
)
3096 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
3097 bfd_get_filename (input_bfd
), h
->root
.root
.string
,
3098 bfd_get_section_name (input_bfd
, input_section
));
3102 relocation
= (h
->root
.u
.def
.value
3103 + sec
->output_section
->vma
3104 + sec
->output_offset
);
3106 else if (h
->root
.type
== bfd_link_hash_undefweak
)
3108 else if (info
->shared
&& !info
->symbolic
&& !info
->no_undefined
3109 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
3113 if (! (*info
->callbacks
->undefined_symbol
) (info
,
3114 h
->root
.root
.string
,
3119 || info
->no_undefined
3120 || ELF_ST_VISIBILITY (h
->other
))))
3126 switch ((int) r_type
)
3129 (*_bfd_error_handler
) (_("%s: unknown relocation type %d for symbol %s"),
3130 bfd_get_filename (input_bfd
),
3131 (int) r_type
, sym_name
);
3133 bfd_set_error (bfd_error_bad_value
);
3137 /* Relocations that need no special processing. */
3138 case (int) R_PPC_LOCAL24PC
:
3139 /* It makes no sense to point a local relocation
3140 at a symbol not in this object. */
3142 && (h
->root
.type
== bfd_link_hash_defined
3143 || h
->root
.type
== bfd_link_hash_defweak
)
3144 && sec
->output_section
== NULL
)
3146 if (! (*info
->callbacks
->undefined_symbol
) (info
,
3147 h
->root
.root
.string
,
3157 /* Relocations that may need to be propagated if this is a shared
3159 case (int) R_PPC_REL24
:
3160 case (int) R_PPC_REL32
:
3161 case (int) R_PPC_REL14
:
3162 /* If these relocations are not to a named symbol, they can be
3163 handled right here, no need to bother the dynamic linker. */
3165 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
3166 || SYMBOL_REFERENCES_LOCAL (info
, h
))
3170 /* Relocations that always need to be propagated if this is a shared
3172 case (int) R_PPC_NONE
:
3173 case (int) R_PPC_ADDR32
:
3174 case (int) R_PPC_ADDR24
:
3175 case (int) R_PPC_ADDR16
:
3176 case (int) R_PPC_ADDR16_LO
:
3177 case (int) R_PPC_ADDR16_HI
:
3178 case (int) R_PPC_ADDR16_HA
:
3179 case (int) R_PPC_ADDR14
:
3180 case (int) R_PPC_UADDR32
:
3181 case (int) R_PPC_UADDR16
:
3184 Elf_Internal_Rela outrel
;
3188 fprintf (stderr
, "ppc_elf_relocate_section need to create relocation for %s\n",
3189 (h
&& h
->root
.root
.string
) ? h
->root
.root
.string
: "<unknown>");
3192 /* When generating a shared object, these relocations
3193 are copied into the output file to be resolved at run
3200 name
= (bfd_elf_string_from_elf_section
3202 elf_elfheader (input_bfd
)->e_shstrndx
,
3203 elf_section_data (input_section
)->rel_hdr
.sh_name
));
3207 BFD_ASSERT (strncmp (name
, ".rela", 5) == 0
3208 && strcmp (bfd_get_section_name (input_bfd
,
3212 sreloc
= bfd_get_section_by_name (dynobj
, name
);
3213 BFD_ASSERT (sreloc
!= NULL
);
3218 if (elf_section_data (input_section
)->stab_info
== NULL
)
3219 outrel
.r_offset
= rel
->r_offset
;
3224 off
= (_bfd_stab_section_offset
3225 (output_bfd
, &elf_hash_table (info
)->stab_info
,
3227 &elf_section_data (input_section
)->stab_info
,
3229 if (off
== (bfd_vma
) -1)
3231 outrel
.r_offset
= off
;
3234 outrel
.r_offset
+= (input_section
->output_section
->vma
3235 + input_section
->output_offset
);
3238 memset (&outrel
, 0, sizeof outrel
);
3239 /* h->dynindx may be -1 if this symbol was marked to
3241 else if (! will_become_local
)
3243 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3244 outrel
.r_addend
= rel
->r_addend
;
3248 if (r_type
== R_PPC_ADDR32
)
3250 outrel
.r_info
= ELF32_R_INFO (0, R_PPC_RELATIVE
);
3251 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3258 sec
= local_sections
[r_symndx
];
3261 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
3263 == bfd_link_hash_defweak
));
3264 sec
= h
->root
.u
.def
.section
;
3266 if (sec
!= NULL
&& bfd_is_abs_section (sec
))
3268 else if (sec
== NULL
|| sec
->owner
== NULL
)
3270 bfd_set_error (bfd_error_bad_value
);
3277 osec
= sec
->output_section
;
3278 indx
= elf_section_data (osec
)->dynindx
;
3279 BFD_ASSERT (indx
> 0);
3283 printf ("indx=%d section=%s flags=%08x name=%s\n",
3284 indx
, osec
->name
, osec
->flags
,
3285 h
->root
.root
.string
);
3290 outrel
.r_info
= ELF32_R_INFO (indx
, r_type
);
3291 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3295 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,
3296 (((Elf32_External_Rela
*)
3298 + sreloc
->reloc_count
));
3299 ++sreloc
->reloc_count
;
3301 /* This reloc will be computed at runtime, so there's no
3302 need to do anything now, unless this is a RELATIVE
3303 reloc in an unallocated section. */
3305 || (input_section
->flags
& SEC_ALLOC
) != 0
3306 || ELF32_R_TYPE (outrel
.r_info
) != R_PPC_RELATIVE
)
3310 /* Arithmetic adjust relocations that aren't going into a
3312 if (r_type
== R_PPC_ADDR16_HA
3313 /* It's just possible that this symbol is a weak symbol
3314 that's not actually defined anywhere. In that case,
3315 'sec' would be NULL, and we should leave the symbol
3316 alone (it will be set to zero elsewhere in the link). */
3319 addend
+= ((relocation
+ addend
) & 0x8000) << 1;
3323 /* branch taken prediction relocations */
3324 case (int) R_PPC_ADDR14_BRTAKEN
:
3325 case (int) R_PPC_REL14_BRTAKEN
:
3326 insn
= bfd_get_32 (output_bfd
, contents
+ offset
);
3327 if ((relocation
- offset
) & 0x8000)
3328 insn
&= ~BRANCH_PREDICT_BIT
;
3330 insn
|= BRANCH_PREDICT_BIT
;
3331 bfd_put_32 (output_bfd
, insn
, contents
+ offset
);
3334 /* branch not taken predicition relocations */
3335 case (int) R_PPC_ADDR14_BRNTAKEN
:
3336 case (int) R_PPC_REL14_BRNTAKEN
:
3337 insn
= bfd_get_32 (output_bfd
, contents
+ offset
);
3338 if ((relocation
- offset
) & 0x8000)
3339 insn
|= BRANCH_PREDICT_BIT
;
3341 insn
&= ~BRANCH_PREDICT_BIT
;
3342 bfd_put_32 (output_bfd
, insn
, contents
+ offset
);
3345 /* GOT16 relocations */
3346 case (int) R_PPC_GOT16
:
3347 case (int) R_PPC_GOT16_LO
:
3348 case (int) R_PPC_GOT16_HI
:
3349 case (int) R_PPC_GOT16_HA
:
3350 /* Relocation is to the entry for this symbol in the global
3352 BFD_ASSERT (sgot
!= NULL
);
3358 off
= h
->got
.offset
;
3359 BFD_ASSERT (off
!= (bfd_vma
) -1);
3361 if (! elf_hash_table (info
)->dynamic_sections_created
3363 && SYMBOL_REFERENCES_LOCAL (info
, h
)))
3365 /* This is actually a static link, or it is a
3366 -Bsymbolic link and the symbol is defined
3367 locally. We must initialize this entry in the
3368 global offset table. Since the offset must
3369 always be a multiple of 4, we use the least
3370 significant bit to record whether we have
3371 initialized it already.
3373 When doing a dynamic link, we create a .rela.got
3374 relocation entry to initialize the value. This
3375 is done in the finish_dynamic_symbol routine. */
3380 bfd_put_32 (output_bfd
, relocation
,
3381 sgot
->contents
+ off
);
3386 relocation
= sgot
->output_offset
+ off
- 4;
3392 BFD_ASSERT (local_got_offsets
!= NULL
3393 && local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
3395 off
= local_got_offsets
[r_symndx
];
3397 /* The offset must always be a multiple of 4. We use
3398 the least significant bit to record whether we have
3399 already processed this entry. */
3404 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
3409 Elf_Internal_Rela outrel
;
3411 /* We need to generate a R_PPC_RELATIVE reloc
3412 for the dynamic linker. */
3413 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
3414 BFD_ASSERT (srelgot
!= NULL
);
3416 outrel
.r_offset
= (sgot
->output_section
->vma
3417 + sgot
->output_offset
3419 outrel
.r_info
= ELF32_R_INFO (0, R_PPC_RELATIVE
);
3420 outrel
.r_addend
= relocation
;
3421 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,
3422 (((Elf32_External_Rela
*)
3424 + srelgot
->reloc_count
));
3425 ++srelgot
->reloc_count
;
3428 local_got_offsets
[r_symndx
] |= 1;
3431 relocation
= sgot
->output_offset
+ off
- 4;
3435 /* Indirect .sdata relocation */
3436 case (int) R_PPC_EMB_SDAI16
:
3437 BFD_ASSERT (sdata
!= NULL
);
3438 relocation
= bfd_elf32_finish_pointer_linker_section (output_bfd
, input_bfd
, info
,
3439 sdata
, h
, relocation
, rel
,
3443 /* Indirect .sdata2 relocation */
3444 case (int) R_PPC_EMB_SDA2I16
:
3445 BFD_ASSERT (sdata2
!= NULL
);
3446 relocation
= bfd_elf32_finish_pointer_linker_section (output_bfd
, input_bfd
, info
,
3447 sdata2
, h
, relocation
, rel
,
3451 /* Handle the TOC16 reloc. We want to use the offset within the .got
3452 section, not the actual VMA. This is appropriate when generating
3453 an embedded ELF object, for which the .got section acts like the
3454 AIX .toc section. */
3455 case (int) R_PPC_TOC16
: /* phony GOT16 relocations */
3456 BFD_ASSERT (sec
!= (asection
*) 0);
3457 BFD_ASSERT (bfd_is_und_section (sec
)
3458 || strcmp (bfd_get_section_name (abfd
, sec
), ".got") == 0
3459 || strcmp (bfd_get_section_name (abfd
, sec
), ".cgot") == 0)
3461 addend
-= sec
->output_section
->vma
+ sec
->output_offset
+ 0x8000;
3464 case (int) R_PPC_PLTREL24
:
3465 /* Relocation is to the entry for this symbol in the
3466 procedure linkage table. */
3467 BFD_ASSERT (h
!= NULL
);
3469 if (h
->plt
.offset
== (bfd_vma
) -1
3472 /* We didn't make a PLT entry for this symbol. This
3473 happens when statically linking PIC code, or when
3474 using -Bsymbolic. */
3478 relocation
= (splt
->output_section
->vma
3479 + splt
->output_offset
3483 /* relocate against _SDA_BASE_ */
3484 case (int) R_PPC_SDAREL16
:
3488 BFD_ASSERT (sec
!= (asection
*) 0);
3489 name
= bfd_get_section_name (abfd
, sec
->output_section
);
3490 if (strcmp (name
, ".sdata") != 0
3491 && strcmp (name
, ".sbss") != 0)
3493 (*_bfd_error_handler
) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3494 bfd_get_filename (input_bfd
),
3496 ppc_elf_howto_table
[(int) r_type
]->name
,
3499 addend
-= (sdata
->sym_hash
->root
.u
.def
.value
3500 + sdata
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3501 + sdata
->sym_hash
->root
.u
.def
.section
->output_offset
);
3505 /* relocate against _SDA2_BASE_ */
3506 case (int) R_PPC_EMB_SDA2REL
:
3510 BFD_ASSERT (sec
!= (asection
*) 0);
3511 name
= bfd_get_section_name (abfd
, sec
->output_section
);
3512 if (strcmp (name
, ".sdata2") != 0 && strcmp (name
, ".sbss2") != 0)
3514 (*_bfd_error_handler
) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3515 bfd_get_filename (input_bfd
),
3517 ppc_elf_howto_table
[(int) r_type
]->name
,
3520 bfd_set_error (bfd_error_bad_value
);
3524 addend
-= (sdata2
->sym_hash
->root
.u
.def
.value
3525 + sdata2
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3526 + sdata2
->sym_hash
->root
.u
.def
.section
->output_offset
);
3530 /* relocate against either _SDA_BASE_, _SDA2_BASE_, or 0 */
3531 case (int) R_PPC_EMB_SDA21
:
3532 case (int) R_PPC_EMB_RELSDA
:
3537 BFD_ASSERT (sec
!= (asection
*) 0);
3538 name
= bfd_get_section_name (abfd
, sec
->output_section
);
3539 if (strcmp (name
, ".sdata") == 0 || strcmp (name
, ".sbss") == 0)
3542 addend
-= (sdata
->sym_hash
->root
.u
.def
.value
3543 + sdata
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3544 + sdata
->sym_hash
->root
.u
.def
.section
->output_offset
);
3547 else if (strcmp (name
, ".sdata2") == 0
3548 || strcmp (name
, ".sbss2") == 0)
3551 addend
-= (sdata2
->sym_hash
->root
.u
.def
.value
3552 + sdata2
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3553 + sdata2
->sym_hash
->root
.u
.def
.section
->output_offset
);
3556 else if (strcmp (name
, ".PPC.EMB.sdata0") == 0
3557 || strcmp (name
, ".PPC.EMB.sbss0") == 0)
3564 (*_bfd_error_handler
) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3565 bfd_get_filename (input_bfd
),
3567 ppc_elf_howto_table
[(int) r_type
]->name
,
3570 bfd_set_error (bfd_error_bad_value
);
3575 if (r_type
== R_PPC_EMB_SDA21
)
3576 { /* fill in register field */
3577 insn
= bfd_get_32 (output_bfd
, contents
+ offset
);
3578 insn
= (insn
& ~RA_REGISTER_MASK
) | (reg
<< RA_REGISTER_SHIFT
);
3579 bfd_put_32 (output_bfd
, insn
, contents
+ offset
);
3584 /* Relocate against the beginning of the section */
3585 case (int) R_PPC_SECTOFF
:
3586 case (int) R_PPC_SECTOFF_LO
:
3587 case (int) R_PPC_SECTOFF_HI
:
3588 BFD_ASSERT (sec
!= (asection
*) 0);
3589 addend
-= sec
->output_section
->vma
;
3592 case (int) R_PPC_SECTOFF_HA
:
3593 BFD_ASSERT (sec
!= (asection
*) 0);
3594 addend
-= sec
->output_section
->vma
;
3595 addend
+= ((relocation
+ addend
) & 0x8000) << 1;
3598 /* Negative relocations */
3599 case (int) R_PPC_EMB_NADDR32
:
3600 case (int) R_PPC_EMB_NADDR16
:
3601 case (int) R_PPC_EMB_NADDR16_LO
:
3602 case (int) R_PPC_EMB_NADDR16_HI
:
3603 addend
-= 2 * relocation
;
3606 case (int) R_PPC_EMB_NADDR16_HA
:
3607 addend
-= 2 * relocation
;
3608 addend
+= ((relocation
+ addend
) & 0x8000) << 1;
3611 /* NOP relocation that prevents garbage collecting linkers from omitting a
3613 case (int) R_PPC_EMB_MRKREF
:
3616 case (int) R_PPC_COPY
:
3617 case (int) R_PPC_GLOB_DAT
:
3618 case (int) R_PPC_JMP_SLOT
:
3619 case (int) R_PPC_RELATIVE
:
3620 case (int) R_PPC_PLT32
:
3621 case (int) R_PPC_PLTREL32
:
3622 case (int) R_PPC_PLT16_LO
:
3623 case (int) R_PPC_PLT16_HI
:
3624 case (int) R_PPC_PLT16_HA
:
3625 case (int) R_PPC_EMB_RELSEC16
:
3626 case (int) R_PPC_EMB_RELST_LO
:
3627 case (int) R_PPC_EMB_RELST_HI
:
3628 case (int) R_PPC_EMB_RELST_HA
:
3629 case (int) R_PPC_EMB_BIT_FLD
:
3630 (*_bfd_error_handler
) (_("%s: Relocation %s is not yet supported for symbol %s."),
3631 bfd_get_filename (input_bfd
),
3632 ppc_elf_howto_table
[(int) r_type
]->name
,
3635 bfd_set_error (bfd_error_invalid_operation
);
3639 case (int) R_PPC_GNU_VTINHERIT
:
3640 case (int) R_PPC_GNU_VTENTRY
:
3641 /* These are no-ops in the end. */
3646 fprintf (stderr
, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n",
3655 r
= _bfd_final_link_relocate (howto
,
3663 if (r
== bfd_reloc_ok
)
3665 else if (r
== bfd_reloc_overflow
)
3671 if (h
->root
.type
== bfd_link_hash_undefweak
3672 && howto
->pc_relative
)
3674 /* Assume this is a call protected by other code that
3675 detect the symbol is undefined. If this is the case,
3676 we can safely ignore the overflow. If not, the
3677 program is hosed anyway, and a little warning isn't
3683 name
= h
->root
.root
.string
;
3687 name
= bfd_elf_string_from_elf_section (input_bfd
,
3688 symtab_hdr
->sh_link
,
3693 name
= bfd_section_name (input_bfd
, sec
);
3696 if (! (*info
->callbacks
->reloc_overflow
) (info
,
3710 fprintf (stderr
, "\n");
3716 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
3717 #define TARGET_LITTLE_NAME "elf32-powerpcle"
3718 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
3719 #define TARGET_BIG_NAME "elf32-powerpc"
3720 #define ELF_ARCH bfd_arch_powerpc
3721 #define ELF_MACHINE_CODE EM_PPC
3722 #define ELF_MAXPAGESIZE 0x10000
3723 #define elf_info_to_howto ppc_elf_info_to_howto
3725 #ifdef EM_CYGNUS_POWERPC
3726 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
3730 #define ELF_MACHINE_ALT2 EM_PPC_OLD
3733 #define elf_backend_plt_not_loaded 1
3734 #define elf_backend_got_symbol_offset 4
3735 #define elf_backend_can_gc_sections 1
3736 #define elf_backend_got_header_size 12
3737 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
3739 #define bfd_elf32_bfd_copy_private_bfd_data ppc_elf_copy_private_bfd_data
3740 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
3741 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
3742 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
3743 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
3744 #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
3746 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
3747 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
3748 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
3749 #define elf_backend_relocate_section ppc_elf_relocate_section
3750 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
3751 #define elf_backend_check_relocs ppc_elf_check_relocs
3752 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
3753 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
3754 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
3755 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
3756 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
3757 #define elf_backend_fake_sections ppc_elf_fake_sections
3758 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
3759 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
3761 #include "elf32-target.h"