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 */
36 static reloc_howto_type
*ppc_elf_reloc_type_lookup
37 PARAMS ((bfd
*abfd
, bfd_reloc_code_real_type code
));
38 static void ppc_elf_info_to_howto
39 PARAMS ((bfd
*abfd
, arelent
*cache_ptr
, Elf32_Internal_Rela
*dst
));
40 static void ppc_elf_howto_init
PARAMS ((void));
41 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
42 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
43 static boolean ppc_elf_set_private_flags
PARAMS ((bfd
*, flagword
));
44 static boolean ppc_elf_copy_private_bfd_data
PARAMS ((bfd
*, bfd
*));
45 static boolean ppc_elf_merge_private_bfd_data
PARAMS ((bfd
*, bfd
*));
47 static int ppc_elf_additional_program_headers
PARAMS ((bfd
*));
48 static boolean ppc_elf_modify_segment_map
PARAMS ((bfd
*));
50 static boolean ppc_elf_create_dynamic_sections
51 PARAMS ((bfd
*, struct bfd_link_info
*));
53 static boolean ppc_elf_section_from_shdr
PARAMS ((bfd
*,
54 Elf32_Internal_Shdr
*,
56 static boolean ppc_elf_fake_sections
57 PARAMS ((bfd
*, Elf32_Internal_Shdr
*, asection
*));
59 static elf_linker_section_t
*ppc_elf_create_linker_section
61 struct bfd_link_info
*info
,
62 enum elf_linker_section_enum
));
64 static boolean ppc_elf_check_relocs
PARAMS ((bfd
*,
65 struct bfd_link_info
*,
67 const Elf_Internal_Rela
*));
69 static asection
* ppc_elf_gc_mark_hook
PARAMS ((bfd
*abfd
,
70 struct bfd_link_info
*info
,
71 Elf_Internal_Rela
*rel
,
72 struct elf_link_hash_entry
*h
,
73 Elf_Internal_Sym
*sym
));
75 static boolean ppc_elf_gc_sweep_hook
PARAMS ((bfd
*abfd
,
76 struct bfd_link_info
*info
,
78 const Elf_Internal_Rela
*relocs
));
80 static boolean ppc_elf_adjust_dynamic_symbol
PARAMS ((struct bfd_link_info
*,
81 struct elf_link_hash_entry
*));
83 static boolean ppc_elf_size_dynamic_sections
PARAMS ((bfd
*, struct bfd_link_info
*));
85 static boolean ppc_elf_relocate_section
PARAMS ((bfd
*,
86 struct bfd_link_info
*info
,
90 Elf_Internal_Rela
*relocs
,
91 Elf_Internal_Sym
*local_syms
,
94 static boolean ppc_elf_add_symbol_hook
PARAMS ((bfd
*,
95 struct bfd_link_info
*,
96 const Elf_Internal_Sym
*,
102 static boolean ppc_elf_finish_dynamic_symbol
PARAMS ((bfd
*,
103 struct bfd_link_info
*,
104 struct elf_link_hash_entry
*,
105 Elf_Internal_Sym
*));
107 static boolean ppc_elf_finish_dynamic_sections
PARAMS ((bfd
*, struct bfd_link_info
*));
109 #define BRANCH_PREDICT_BIT 0x200000 /* branch prediction bit for branch taken relocs */
110 #define RA_REGISTER_MASK 0x001f0000 /* mask to set RA in memory instructions */
111 #define RA_REGISTER_SHIFT 16 /* value to shift register by to insert RA */
113 /* The name of the dynamic interpreter. This is put in the .interp
116 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
118 /* The size in bytes of an entry in the procedure linkage table. */
119 #define PLT_ENTRY_SIZE 12
120 /* The initial size of the plt reserved for the dynamic linker. */
121 #define PLT_INITIAL_ENTRY_SIZE 72
122 /* The size of the gap between entries in the PLT. */
123 #define PLT_SLOT_SIZE 8
124 /* The number of single-slot PLT entries (the rest use two slots). */
125 #define PLT_NUM_SINGLE_ENTRIES 8192
127 /* Will references to this symbol always reference the symbol
129 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
132 || H->dynindx == -1 \
133 || ELF_ST_VISIBILITY (H->other) == STV_INTERNAL \
134 || ELF_ST_VISIBILITY (H->other) == STV_HIDDEN) \
135 && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
137 /* Will _calls_ to this symbol always call the version in this object? */
138 #define SYMBOL_CALLS_LOCAL(INFO, H) \
141 || H->dynindx == -1 \
142 || ELF_ST_VISIBILITY (H->other) != STV_DEFAULT) \
143 && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
145 static reloc_howto_type
*ppc_elf_howto_table
[ (int)R_PPC_max
];
147 static reloc_howto_type ppc_elf_howto_raw
[] =
149 /* This reloc does nothing. */
150 HOWTO (R_PPC_NONE
, /* type */
152 2, /* size (0 = byte, 1 = short, 2 = long) */
154 false, /* pc_relative */
156 complain_overflow_bitfield
, /* complain_on_overflow */
157 bfd_elf_generic_reloc
, /* special_function */
158 "R_PPC_NONE", /* name */
159 false, /* partial_inplace */
162 false), /* pcrel_offset */
164 /* A standard 32 bit relocation. */
165 HOWTO (R_PPC_ADDR32
, /* type */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
169 false, /* pc_relative */
171 complain_overflow_bitfield
, /* complain_on_overflow */
172 bfd_elf_generic_reloc
, /* special_function */
173 "R_PPC_ADDR32", /* name */
174 false, /* partial_inplace */
176 0xffffffff, /* dst_mask */
177 false), /* pcrel_offset */
179 /* An absolute 26 bit branch; the lower two bits must be zero.
180 FIXME: we don't check that, we just clear them. */
181 HOWTO (R_PPC_ADDR24
, /* type */
183 2, /* size (0 = byte, 1 = short, 2 = long) */
185 false, /* pc_relative */
187 complain_overflow_bitfield
, /* complain_on_overflow */
188 bfd_elf_generic_reloc
, /* special_function */
189 "R_PPC_ADDR24", /* name */
190 false, /* partial_inplace */
192 0x3fffffc, /* dst_mask */
193 false), /* pcrel_offset */
195 /* A standard 16 bit relocation. */
196 HOWTO (R_PPC_ADDR16
, /* type */
198 1, /* size (0 = byte, 1 = short, 2 = long) */
200 false, /* pc_relative */
202 complain_overflow_bitfield
, /* complain_on_overflow */
203 bfd_elf_generic_reloc
, /* special_function */
204 "R_PPC_ADDR16", /* name */
205 false, /* partial_inplace */
207 0xffff, /* dst_mask */
208 false), /* pcrel_offset */
210 /* A 16 bit relocation without overflow. */
211 HOWTO (R_PPC_ADDR16_LO
, /* type */
213 1, /* size (0 = byte, 1 = short, 2 = long) */
215 false, /* pc_relative */
217 complain_overflow_dont
,/* complain_on_overflow */
218 bfd_elf_generic_reloc
, /* special_function */
219 "R_PPC_ADDR16_LO", /* name */
220 false, /* partial_inplace */
222 0xffff, /* dst_mask */
223 false), /* pcrel_offset */
225 /* The high order 16 bits of an address. */
226 HOWTO (R_PPC_ADDR16_HI
, /* type */
228 1, /* size (0 = byte, 1 = short, 2 = long) */
230 false, /* pc_relative */
232 complain_overflow_dont
, /* complain_on_overflow */
233 bfd_elf_generic_reloc
, /* special_function */
234 "R_PPC_ADDR16_HI", /* name */
235 false, /* partial_inplace */
237 0xffff, /* dst_mask */
238 false), /* pcrel_offset */
240 /* The high order 16 bits of an address, plus 1 if the contents of
241 the low 16 bits, treated as a signed number, is negative. */
242 HOWTO (R_PPC_ADDR16_HA
, /* type */
244 1, /* size (0 = byte, 1 = short, 2 = long) */
246 false, /* pc_relative */
248 complain_overflow_dont
, /* complain_on_overflow */
249 ppc_elf_addr16_ha_reloc
, /* special_function */
250 "R_PPC_ADDR16_HA", /* name */
251 false, /* partial_inplace */
253 0xffff, /* dst_mask */
254 false), /* pcrel_offset */
256 /* An absolute 16 bit branch; the lower two bits must be zero.
257 FIXME: we don't check that, we just clear them. */
258 HOWTO (R_PPC_ADDR14
, /* type */
260 2, /* size (0 = byte, 1 = short, 2 = long) */
262 false, /* pc_relative */
264 complain_overflow_bitfield
, /* complain_on_overflow */
265 bfd_elf_generic_reloc
, /* special_function */
266 "R_PPC_ADDR14", /* name */
267 false, /* partial_inplace */
269 0xfffc, /* dst_mask */
270 false), /* pcrel_offset */
272 /* An absolute 16 bit branch, for which bit 10 should be set to
273 indicate that the branch is expected to be taken. The lower two
274 bits must be zero. */
275 HOWTO (R_PPC_ADDR14_BRTAKEN
, /* type */
277 2, /* size (0 = byte, 1 = short, 2 = long) */
279 false, /* pc_relative */
281 complain_overflow_bitfield
, /* complain_on_overflow */
282 bfd_elf_generic_reloc
, /* special_function */
283 "R_PPC_ADDR14_BRTAKEN",/* name */
284 false, /* partial_inplace */
286 0xfffc, /* dst_mask */
287 false), /* pcrel_offset */
289 /* An absolute 16 bit branch, for which bit 10 should be set to
290 indicate that the branch is not expected to be taken. The lower
291 two bits must be zero. */
292 HOWTO (R_PPC_ADDR14_BRNTAKEN
, /* type */
294 2, /* size (0 = byte, 1 = short, 2 = long) */
296 false, /* pc_relative */
298 complain_overflow_bitfield
, /* complain_on_overflow */
299 bfd_elf_generic_reloc
, /* special_function */
300 "R_PPC_ADDR14_BRNTAKEN",/* name */
301 false, /* partial_inplace */
303 0xfffc, /* dst_mask */
304 false), /* pcrel_offset */
306 /* A relative 26 bit branch; the lower two bits must be zero. */
307 HOWTO (R_PPC_REL24
, /* type */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
311 true, /* pc_relative */
313 complain_overflow_signed
, /* complain_on_overflow */
314 bfd_elf_generic_reloc
, /* special_function */
315 "R_PPC_REL24", /* name */
316 false, /* partial_inplace */
318 0x3fffffc, /* dst_mask */
319 true), /* pcrel_offset */
321 /* A relative 16 bit branch; the lower two bits must be zero. */
322 HOWTO (R_PPC_REL14
, /* type */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
326 true, /* pc_relative */
328 complain_overflow_signed
, /* complain_on_overflow */
329 bfd_elf_generic_reloc
, /* special_function */
330 "R_PPC_REL14", /* name */
331 false, /* partial_inplace */
333 0xfffc, /* dst_mask */
334 true), /* pcrel_offset */
336 /* A relative 16 bit branch. Bit 10 should be set to indicate that
337 the branch is expected to be taken. The lower two bits must be
339 HOWTO (R_PPC_REL14_BRTAKEN
, /* type */
341 2, /* size (0 = byte, 1 = short, 2 = long) */
343 true, /* pc_relative */
345 complain_overflow_signed
, /* complain_on_overflow */
346 bfd_elf_generic_reloc
, /* special_function */
347 "R_PPC_REL14_BRTAKEN", /* name */
348 false, /* partial_inplace */
350 0xfffc, /* dst_mask */
351 true), /* pcrel_offset */
353 /* A relative 16 bit branch. Bit 10 should be set to indicate that
354 the branch is not expected to be taken. The lower two bits must
356 HOWTO (R_PPC_REL14_BRNTAKEN
, /* type */
358 2, /* size (0 = byte, 1 = short, 2 = long) */
360 true, /* pc_relative */
362 complain_overflow_signed
, /* complain_on_overflow */
363 bfd_elf_generic_reloc
, /* special_function */
364 "R_PPC_REL14_BRNTAKEN",/* name */
365 false, /* partial_inplace */
367 0xfffc, /* dst_mask */
368 true), /* pcrel_offset */
370 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
372 HOWTO (R_PPC_GOT16
, /* type */
374 1, /* size (0 = byte, 1 = short, 2 = long) */
376 false, /* pc_relative */
378 complain_overflow_signed
, /* complain_on_overflow */
379 bfd_elf_generic_reloc
, /* special_function */
380 "R_PPC_GOT16", /* name */
381 false, /* partial_inplace */
383 0xffff, /* dst_mask */
384 false), /* pcrel_offset */
386 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
388 HOWTO (R_PPC_GOT16_LO
, /* type */
390 1, /* size (0 = byte, 1 = short, 2 = long) */
392 false, /* pc_relative */
394 complain_overflow_dont
, /* complain_on_overflow */
395 bfd_elf_generic_reloc
, /* special_function */
396 "R_PPC_GOT16_LO", /* name */
397 false, /* partial_inplace */
399 0xffff, /* dst_mask */
400 false), /* pcrel_offset */
402 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
404 HOWTO (R_PPC_GOT16_HI
, /* type */
406 1, /* size (0 = byte, 1 = short, 2 = long) */
408 false, /* pc_relative */
410 complain_overflow_bitfield
, /* complain_on_overflow */
411 bfd_elf_generic_reloc
, /* special_function */
412 "R_PPC_GOT16_HI", /* name */
413 false, /* partial_inplace */
415 0xffff, /* dst_mask */
416 false), /* pcrel_offset */
418 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
420 HOWTO (R_PPC_GOT16_HA
, /* type */
422 1, /* size (0 = byte, 1 = short, 2 = long) */
424 false, /* pc_relative */
426 complain_overflow_bitfield
, /* complain_on_overflow */
427 ppc_elf_addr16_ha_reloc
, /* special_function */
428 "R_PPC_GOT16_HA", /* name */
429 false, /* partial_inplace */
431 0xffff, /* dst_mask */
432 false), /* pcrel_offset */
434 /* Like R_PPC_REL24, but referring to the procedure linkage table
435 entry for the symbol. */
436 HOWTO (R_PPC_PLTREL24
, /* type */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
440 true, /* pc_relative */
442 complain_overflow_signed
, /* complain_on_overflow */
443 bfd_elf_generic_reloc
, /* special_function */
444 "R_PPC_PLTREL24", /* name */
445 false, /* partial_inplace */
447 0x3fffffc, /* dst_mask */
448 true), /* pcrel_offset */
450 /* This is used only by the dynamic linker. The symbol should exist
451 both in the object being run and in some shared library. The
452 dynamic linker copies the data addressed by the symbol from the
453 shared library into the object, because the object being
454 run has to have the data at some particular address. */
455 HOWTO (R_PPC_COPY
, /* type */
457 2, /* size (0 = byte, 1 = short, 2 = long) */
459 false, /* pc_relative */
461 complain_overflow_bitfield
, /* complain_on_overflow */
462 bfd_elf_generic_reloc
, /* special_function */
463 "R_PPC_COPY", /* name */
464 false, /* partial_inplace */
467 false), /* pcrel_offset */
469 /* Like R_PPC_ADDR32, but used when setting global offset table
471 HOWTO (R_PPC_GLOB_DAT
, /* type */
473 2, /* size (0 = byte, 1 = short, 2 = long) */
475 false, /* pc_relative */
477 complain_overflow_bitfield
, /* complain_on_overflow */
478 bfd_elf_generic_reloc
, /* special_function */
479 "R_PPC_GLOB_DAT", /* name */
480 false, /* partial_inplace */
482 0xffffffff, /* dst_mask */
483 false), /* pcrel_offset */
485 /* Marks a procedure linkage table entry for a symbol. */
486 HOWTO (R_PPC_JMP_SLOT
, /* type */
488 2, /* size (0 = byte, 1 = short, 2 = long) */
490 false, /* pc_relative */
492 complain_overflow_bitfield
, /* complain_on_overflow */
493 bfd_elf_generic_reloc
, /* special_function */
494 "R_PPC_JMP_SLOT", /* name */
495 false, /* partial_inplace */
498 false), /* pcrel_offset */
500 /* Used only by the dynamic linker. When the object is run, this
501 longword is set to the load address of the object, plus the
503 HOWTO (R_PPC_RELATIVE
, /* type */
505 2, /* size (0 = byte, 1 = short, 2 = long) */
507 false, /* pc_relative */
509 complain_overflow_bitfield
, /* complain_on_overflow */
510 bfd_elf_generic_reloc
, /* special_function */
511 "R_PPC_RELATIVE", /* name */
512 false, /* partial_inplace */
514 0xffffffff, /* dst_mask */
515 false), /* pcrel_offset */
517 /* Like R_PPC_REL24, but uses the value of the symbol within the
518 object rather than the final value. Normally used for
519 _GLOBAL_OFFSET_TABLE_. */
520 HOWTO (R_PPC_LOCAL24PC
, /* type */
522 2, /* size (0 = byte, 1 = short, 2 = long) */
524 true, /* pc_relative */
526 complain_overflow_signed
, /* complain_on_overflow */
527 bfd_elf_generic_reloc
, /* special_function */
528 "R_PPC_LOCAL24PC", /* name */
529 false, /* partial_inplace */
531 0x3fffffc, /* dst_mask */
532 true), /* pcrel_offset */
534 /* Like R_PPC_ADDR32, but may be unaligned. */
535 HOWTO (R_PPC_UADDR32
, /* type */
537 2, /* size (0 = byte, 1 = short, 2 = long) */
539 false, /* pc_relative */
541 complain_overflow_bitfield
, /* complain_on_overflow */
542 bfd_elf_generic_reloc
, /* special_function */
543 "R_PPC_UADDR32", /* name */
544 false, /* partial_inplace */
546 0xffffffff, /* dst_mask */
547 false), /* pcrel_offset */
549 /* Like R_PPC_ADDR16, but may be unaligned. */
550 HOWTO (R_PPC_UADDR16
, /* type */
552 1, /* size (0 = byte, 1 = short, 2 = long) */
554 false, /* pc_relative */
556 complain_overflow_bitfield
, /* complain_on_overflow */
557 bfd_elf_generic_reloc
, /* special_function */
558 "R_PPC_UADDR16", /* name */
559 false, /* partial_inplace */
561 0xffff, /* dst_mask */
562 false), /* pcrel_offset */
564 /* 32-bit PC relative */
565 HOWTO (R_PPC_REL32
, /* type */
567 2, /* size (0 = byte, 1 = short, 2 = long) */
569 true, /* pc_relative */
571 complain_overflow_bitfield
, /* complain_on_overflow */
572 bfd_elf_generic_reloc
, /* special_function */
573 "R_PPC_REL32", /* name */
574 false, /* partial_inplace */
576 0xffffffff, /* dst_mask */
577 true), /* pcrel_offset */
579 /* 32-bit relocation to the symbol's procedure linkage table.
580 FIXME: not supported. */
581 HOWTO (R_PPC_PLT32
, /* type */
583 2, /* size (0 = byte, 1 = short, 2 = long) */
585 false, /* pc_relative */
587 complain_overflow_bitfield
, /* complain_on_overflow */
588 bfd_elf_generic_reloc
, /* special_function */
589 "R_PPC_PLT32", /* name */
590 false, /* partial_inplace */
593 false), /* pcrel_offset */
595 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
596 FIXME: not supported. */
597 HOWTO (R_PPC_PLTREL32
, /* type */
599 2, /* size (0 = byte, 1 = short, 2 = long) */
601 true, /* pc_relative */
603 complain_overflow_bitfield
, /* complain_on_overflow */
604 bfd_elf_generic_reloc
, /* special_function */
605 "R_PPC_PLTREL32", /* name */
606 false, /* partial_inplace */
609 true), /* pcrel_offset */
611 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
613 HOWTO (R_PPC_PLT16_LO
, /* type */
615 1, /* size (0 = byte, 1 = short, 2 = long) */
617 false, /* pc_relative */
619 complain_overflow_dont
, /* complain_on_overflow */
620 bfd_elf_generic_reloc
, /* special_function */
621 "R_PPC_PLT16_LO", /* name */
622 false, /* partial_inplace */
624 0xffff, /* dst_mask */
625 false), /* pcrel_offset */
627 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
629 HOWTO (R_PPC_PLT16_HI
, /* type */
631 1, /* size (0 = byte, 1 = short, 2 = long) */
633 false, /* pc_relative */
635 complain_overflow_bitfield
, /* complain_on_overflow */
636 bfd_elf_generic_reloc
, /* special_function */
637 "R_PPC_PLT16_HI", /* name */
638 false, /* partial_inplace */
640 0xffff, /* dst_mask */
641 false), /* pcrel_offset */
643 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
645 HOWTO (R_PPC_PLT16_HA
, /* type */
647 1, /* size (0 = byte, 1 = short, 2 = long) */
649 false, /* pc_relative */
651 complain_overflow_bitfield
, /* complain_on_overflow */
652 ppc_elf_addr16_ha_reloc
, /* special_function */
653 "R_PPC_PLT16_HA", /* name */
654 false, /* partial_inplace */
656 0xffff, /* dst_mask */
657 false), /* pcrel_offset */
659 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
661 HOWTO (R_PPC_SDAREL16
, /* type */
663 1, /* size (0 = byte, 1 = short, 2 = long) */
665 false, /* pc_relative */
667 complain_overflow_signed
, /* complain_on_overflow */
668 bfd_elf_generic_reloc
, /* special_function */
669 "R_PPC_SDAREL16", /* name */
670 false, /* partial_inplace */
672 0xffff, /* dst_mask */
673 false), /* pcrel_offset */
675 /* 32-bit section relative relocation. */
676 HOWTO (R_PPC_SECTOFF
, /* type */
678 2, /* size (0 = byte, 1 = short, 2 = long) */
680 true, /* pc_relative */
682 complain_overflow_bitfield
, /* complain_on_overflow */
683 bfd_elf_generic_reloc
, /* special_function */
684 "R_PPC_SECTOFF", /* name */
685 false, /* partial_inplace */
688 true), /* pcrel_offset */
690 /* 16-bit lower half section relative relocation. */
691 HOWTO (R_PPC_SECTOFF_LO
, /* type */
693 1, /* size (0 = byte, 1 = short, 2 = long) */
695 false, /* pc_relative */
697 complain_overflow_dont
, /* complain_on_overflow */
698 bfd_elf_generic_reloc
, /* special_function */
699 "R_PPC_SECTOFF_LO", /* name */
700 false, /* partial_inplace */
702 0xffff, /* dst_mask */
703 false), /* pcrel_offset */
705 /* 16-bit upper half section relative relocation. */
706 HOWTO (R_PPC_SECTOFF_HI
, /* type */
708 1, /* size (0 = byte, 1 = short, 2 = long) */
710 false, /* pc_relative */
712 complain_overflow_bitfield
, /* complain_on_overflow */
713 bfd_elf_generic_reloc
, /* special_function */
714 "R_PPC_SECTOFF_HI", /* name */
715 false, /* partial_inplace */
717 0xffff, /* dst_mask */
718 false), /* pcrel_offset */
720 /* 16-bit upper half adjusted section relative relocation. */
721 HOWTO (R_PPC_SECTOFF_HA
, /* type */
723 1, /* size (0 = byte, 1 = short, 2 = long) */
725 false, /* pc_relative */
727 complain_overflow_bitfield
, /* complain_on_overflow */
728 ppc_elf_addr16_ha_reloc
, /* special_function */
729 "R_PPC_SECTOFF_HA", /* name */
730 false, /* partial_inplace */
732 0xffff, /* dst_mask */
733 false), /* pcrel_offset */
735 /* The remaining relocs are from the Embedded ELF ABI, and are not
736 in the SVR4 ELF ABI. */
738 /* 32 bit value resulting from the addend minus the symbol */
739 HOWTO (R_PPC_EMB_NADDR32
, /* type */
741 2, /* size (0 = byte, 1 = short, 2 = long) */
743 false, /* pc_relative */
745 complain_overflow_bitfield
, /* complain_on_overflow */
746 bfd_elf_generic_reloc
, /* special_function */
747 "R_PPC_EMB_NADDR32", /* name */
748 false, /* partial_inplace */
750 0xffffffff, /* dst_mask */
751 false), /* pcrel_offset */
753 /* 16 bit value resulting from the addend minus the symbol */
754 HOWTO (R_PPC_EMB_NADDR16
, /* type */
756 1, /* size (0 = byte, 1 = short, 2 = long) */
758 false, /* pc_relative */
760 complain_overflow_bitfield
, /* complain_on_overflow */
761 bfd_elf_generic_reloc
, /* special_function */
762 "R_PPC_EMB_NADDR16", /* name */
763 false, /* partial_inplace */
765 0xffff, /* dst_mask */
766 false), /* pcrel_offset */
768 /* 16 bit value resulting from the addend minus the symbol */
769 HOWTO (R_PPC_EMB_NADDR16_LO
, /* type */
771 1, /* size (0 = byte, 1 = short, 2 = long) */
773 false, /* pc_relative */
775 complain_overflow_dont
,/* complain_on_overflow */
776 bfd_elf_generic_reloc
, /* special_function */
777 "R_PPC_EMB_ADDR16_LO", /* name */
778 false, /* partial_inplace */
780 0xffff, /* dst_mask */
781 false), /* pcrel_offset */
783 /* The high order 16 bits of the addend minus the symbol */
784 HOWTO (R_PPC_EMB_NADDR16_HI
, /* type */
786 1, /* size (0 = byte, 1 = short, 2 = long) */
788 false, /* pc_relative */
790 complain_overflow_dont
, /* complain_on_overflow */
791 bfd_elf_generic_reloc
, /* special_function */
792 "R_PPC_EMB_NADDR16_HI", /* name */
793 false, /* partial_inplace */
795 0xffff, /* dst_mask */
796 false), /* pcrel_offset */
798 /* The high order 16 bits of the result of the addend minus the address,
799 plus 1 if the contents of the low 16 bits, treated as a signed number,
801 HOWTO (R_PPC_EMB_NADDR16_HA
, /* type */
803 1, /* size (0 = byte, 1 = short, 2 = long) */
805 false, /* pc_relative */
807 complain_overflow_dont
, /* complain_on_overflow */
808 ppc_elf_addr16_ha_reloc
, /* special_function */
809 "R_PPC_EMB_NADDR16_HA", /* name */
810 false, /* partial_inplace */
812 0xffff, /* dst_mask */
813 false), /* pcrel_offset */
815 /* 16 bit value resulting from allocating a 4 byte word to hold an
816 address in the .sdata section, and returning the offset from
817 _SDA_BASE_ for that relocation */
818 HOWTO (R_PPC_EMB_SDAI16
, /* type */
820 1, /* size (0 = byte, 1 = short, 2 = long) */
822 false, /* pc_relative */
824 complain_overflow_bitfield
, /* complain_on_overflow */
825 bfd_elf_generic_reloc
, /* special_function */
826 "R_PPC_EMB_SDAI16", /* name */
827 false, /* partial_inplace */
829 0xffff, /* dst_mask */
830 false), /* pcrel_offset */
832 /* 16 bit value resulting from allocating a 4 byte word to hold an
833 address in the .sdata2 section, and returning the offset from
834 _SDA2_BASE_ for that relocation */
835 HOWTO (R_PPC_EMB_SDA2I16
, /* type */
837 1, /* size (0 = byte, 1 = short, 2 = long) */
839 false, /* pc_relative */
841 complain_overflow_bitfield
, /* complain_on_overflow */
842 bfd_elf_generic_reloc
, /* special_function */
843 "R_PPC_EMB_SDA2I16", /* name */
844 false, /* partial_inplace */
846 0xffff, /* dst_mask */
847 false), /* pcrel_offset */
849 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
851 HOWTO (R_PPC_EMB_SDA2REL
, /* type */
853 1, /* size (0 = byte, 1 = short, 2 = long) */
855 false, /* pc_relative */
857 complain_overflow_signed
, /* complain_on_overflow */
858 bfd_elf_generic_reloc
, /* special_function */
859 "R_PPC_EMB_SDA2REL", /* name */
860 false, /* partial_inplace */
862 0xffff, /* dst_mask */
863 false), /* pcrel_offset */
865 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
866 signed offset from the appropriate base, and filling in the register
867 field with the appropriate register (0, 2, or 13). */
868 HOWTO (R_PPC_EMB_SDA21
, /* type */
870 2, /* size (0 = byte, 1 = short, 2 = long) */
872 false, /* pc_relative */
874 complain_overflow_signed
, /* complain_on_overflow */
875 bfd_elf_generic_reloc
, /* special_function */
876 "R_PPC_EMB_SDA21", /* name */
877 false, /* partial_inplace */
879 0xffff, /* dst_mask */
880 false), /* pcrel_offset */
882 /* Relocation not handled: R_PPC_EMB_MRKREF */
883 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
884 /* Relocation not handled: R_PPC_EMB_RELST_LO */
885 /* Relocation not handled: R_PPC_EMB_RELST_HI */
886 /* Relocation not handled: R_PPC_EMB_RELST_HA */
887 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
889 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
890 in the 16 bit signed offset from the appropriate base, and filling in the
891 register field with the appropriate register (0, 2, or 13). */
892 HOWTO (R_PPC_EMB_RELSDA
, /* type */
894 1, /* size (0 = byte, 1 = short, 2 = long) */
896 true, /* pc_relative */
898 complain_overflow_signed
, /* complain_on_overflow */
899 bfd_elf_generic_reloc
, /* special_function */
900 "R_PPC_EMB_RELSDA", /* name */
901 false, /* partial_inplace */
903 0xffff, /* dst_mask */
904 false), /* pcrel_offset */
906 /* GNU extension to record C++ vtable hierarchy */
907 HOWTO (R_PPC_GNU_VTINHERIT
, /* type */
909 0, /* size (0 = byte, 1 = short, 2 = long) */
911 false, /* pc_relative */
913 complain_overflow_dont
, /* complain_on_overflow */
914 NULL
, /* special_function */
915 "R_PPC_GNU_VTINHERIT", /* name */
916 false, /* partial_inplace */
919 false), /* pcrel_offset */
921 /* GNU extension to record C++ vtable member usage */
922 HOWTO (R_PPC_GNU_VTENTRY
, /* type */
924 0, /* size (0 = byte, 1 = short, 2 = long) */
926 false, /* pc_relative */
928 complain_overflow_dont
, /* complain_on_overflow */
929 NULL
, /* special_function */
930 "R_PPC_GNU_VTENTRY", /* name */
931 false, /* partial_inplace */
934 false), /* pcrel_offset */
936 /* Phony reloc to handle AIX style TOC entries */
937 HOWTO (R_PPC_TOC16
, /* type */
939 1, /* size (0 = byte, 1 = short, 2 = long) */
941 false, /* pc_relative */
943 complain_overflow_signed
, /* complain_on_overflow */
944 bfd_elf_generic_reloc
, /* special_function */
945 "R_PPC_TOC16", /* name */
946 false, /* partial_inplace */
948 0xffff, /* dst_mask */
949 false), /* pcrel_offset */
953 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
956 ppc_elf_howto_init ()
958 unsigned int i
, type
;
960 for (i
= 0; i
< sizeof (ppc_elf_howto_raw
) / sizeof (ppc_elf_howto_raw
[0]); i
++)
962 type
= ppc_elf_howto_raw
[i
].type
;
963 BFD_ASSERT (type
< sizeof(ppc_elf_howto_table
) / sizeof(ppc_elf_howto_table
[0]));
964 ppc_elf_howto_table
[type
] = &ppc_elf_howto_raw
[i
];
969 /* This function handles relaxing for the PPC with option --mpc860c0[=<n>].
971 The MPC860, revision C0 or earlier contains a bug in the die.
972 If all of the following conditions are true, the next instruction
973 to be executed *may* be treated as a no-op.
974 1/ A forward branch is executed.
975 2/ The branch is predicted as not taken.
976 3/ The branch is taken.
977 4/ The branch is located in the last 5 words of a page.
978 (The EOP limit is 5 by default but may be specified as any value from 1-10.)
980 Our software solution is to detect these problematic branches in a
981 linker pass and modify them as follows:
982 1/ Unconditional branches - Since these are always predicted taken,
983 there is no problem and no action is required.
984 2/ Conditional backward branches - No problem, no action required.
985 3/ Conditional forward branches - Ensure that the "inverse prediction
986 bit" is set (ensure it is predicted taken).
987 4/ Conditional register branches - Ensure that the "y bit" is set
988 (ensure it is predicted taken).
991 /* Sort sections by address. */
994 ppc_elf_sort_rela (arg1
, arg2
)
998 const Elf_Internal_Rela
**rela1
= (const Elf_Internal_Rela
**) arg1
;
999 const Elf_Internal_Rela
**rela2
= (const Elf_Internal_Rela
**) arg2
;
1001 /* Sort by offset. */
1002 return ((*rela1
)->r_offset
- (*rela2
)->r_offset
);
1006 ppc_elf_relax_section (abfd
, isec
, link_info
, again
)
1009 struct bfd_link_info
*link_info
;
1012 #define PAGESIZE 0x1000
1014 bfd_byte
*contents
= NULL
;
1015 bfd_byte
*free_contents
= NULL
;
1016 Elf_Internal_Rela
*internal_relocs
= NULL
;
1017 Elf_Internal_Rela
*free_relocs
= NULL
;
1018 Elf_Internal_Rela
**rela_comb
= NULL
;
1019 int comb_curr
, comb_count
;
1021 /* We never have to do this more than once per input section. */
1024 /* If needed, initialize this section's cooked size. */
1025 if (isec
->_cooked_size
== 0)
1026 isec
->_cooked_size
= isec
->_raw_size
;
1028 /* We're only interested in text sections which overlap the
1029 troublesome area at the end of a page. */
1030 if (link_info
->mpc860c0
&& (isec
->flags
& SEC_CODE
) && isec
->_cooked_size
)
1032 bfd_vma dot
, end_page
, end_section
;
1033 boolean section_modified
;
1035 /* Get the section contents. */
1036 /* Get cached copy if it exists. */
1037 if (elf_section_data (isec
)->this_hdr
.contents
!= NULL
)
1038 contents
= elf_section_data (isec
)->this_hdr
.contents
;
1041 /* Go get them off disk. */
1042 contents
= (bfd_byte
*) bfd_malloc (isec
->_raw_size
);
1043 if (contents
== NULL
)
1045 free_contents
= contents
;
1047 if (! bfd_get_section_contents (abfd
, isec
, contents
,
1048 (file_ptr
) 0, isec
->_raw_size
))
1054 if (isec
->reloc_count
)
1058 /* Get a copy of the native relocations. */
1059 internal_relocs
= _bfd_elf32_link_read_relocs (
1060 abfd
, isec
, (PTR
) NULL
, (Elf_Internal_Rela
*) NULL
,
1061 link_info
->keep_memory
);
1062 if (internal_relocs
== NULL
)
1064 if (! link_info
->keep_memory
)
1065 free_relocs
= internal_relocs
;
1067 /* Setup a faster access method for the reloc info we need. */
1068 rela_comb
= (Elf_Internal_Rela
**)
1069 bfd_malloc (isec
->reloc_count
*sizeof(Elf_Internal_Rela
*));
1070 if (rela_comb
== NULL
)
1072 for (n
=0; n
<isec
->reloc_count
; ++n
)
1076 r_type
= ELF32_R_TYPE (internal_relocs
[n
].r_info
);
1077 if (r_type
< 0 || r_type
>= (int)R_PPC_max
)
1080 /* Prologue constants are sometimes present in the ".text"
1081 sections and they can be identified by their associated relocation.
1082 We don't want to process those words and some others which
1083 can also be identified by their relocations. However, not all
1084 conditional branches will have a relocation so we will
1085 only ignore words that 1) have a reloc, and 2) the reloc
1086 is not applicable to a conditional branch.
1087 The array rela_comb is built here for use in the EOP scan loop. */
1090 case R_PPC_ADDR14_BRNTAKEN
: /* absolute, predicted not taken */
1091 case R_PPC_REL14
: /* relative cond. br. */
1092 case R_PPC_REL14_BRNTAKEN
: /* rel. cond. br., predicted not taken */
1093 /* We should check the instruction. */
1096 /* The word is not a conditional branch - ignore it. */
1097 rela_comb
[comb_count
++] = &internal_relocs
[n
];
1102 qsort (rela_comb
, (size_t) comb_count
, sizeof (int), ppc_elf_sort_rela
);
1105 /* Enumerate each EOP region that overlaps this section. */
1106 end_section
= isec
->vma
+ isec
->_cooked_size
;
1107 dot
= end_page
= (isec
->vma
| (PAGESIZE
- 1)) + 1;
1108 dot
-= link_info
->mpc860c0
;
1109 section_modified
= false;
1110 if (dot
< isec
->vma
) /* Increment the start position if this section */
1111 dot
= isec
->vma
; /* begins in the middle of its first EOP region. */
1114 dot
+= PAGESIZE
, end_page
+= PAGESIZE
)
1117 /* Check each word in this EOP region. */
1118 for (; dot
< end_page
; dot
+= 4)
1120 bfd_vma isec_offset
;
1122 boolean skip
, modified
;
1124 /* Don't process this word if there is a relocation for it and
1125 the relocation indicates the word is not a conditional branch. */
1127 isec_offset
= dot
- isec
->vma
;
1128 for (; comb_curr
<comb_count
; ++comb_curr
)
1132 r_offset
= rela_comb
[comb_curr
]->r_offset
;
1133 if (r_offset
>= isec_offset
)
1135 if (r_offset
== isec_offset
) skip
= true;
1141 /* Check the current word for a problematic conditional branch. */
1142 #define BO0(insn) ((insn) & 0x02000000)
1143 #define BO2(insn) ((insn) & 0x00800000)
1144 #define BO4(insn) ((insn) & 0x00200000)
1145 insn
= (unsigned long) bfd_get_32 (abfd
, contents
+ isec_offset
);
1147 if ((insn
& 0xFc000000) == 0x40000000)
1149 /* Instruction is BCx */
1150 if ((!BO0(insn
) || !BO2(insn
)) && !BO4(insn
))
1153 /* This branch is predicted as "normal".
1154 If this is a forward branch, it is problematic. */
1156 target
= insn
& 0x0000Fffc; /*extract*/
1157 target
= (target
^ 0x8000) - 0x8000; /*sign extend*/
1158 if ((insn
& 0x00000002) == 0)
1159 target
+= dot
; /*convert to abs*/
1162 insn
|= 0x00200000; /* set the prediction bit */
1167 else if ((insn
& 0xFc00Fffe) == 0x4c000420)
1169 /* Instruction is BCCTRx */
1170 if ((!BO0(insn
) || !BO2(insn
)) && !BO4(insn
))
1172 /* This branch is predicted as not-taken.
1173 If this is a forward branch, it is problematic.
1174 Since we can't tell statically if it will branch forward,
1175 always set the prediction bit. */
1176 insn
|= 0x00200000; /* set the prediction bit */
1180 else if ((insn
& 0xFc00Fffe) == 0x4c000020)
1182 /* Instruction is BCLRx */
1183 if ((!BO0(insn
) || !BO2(insn
)) && !BO4(insn
))
1185 /* This branch is predicted as not-taken.
1186 If this is a forward branch, it is problematic.
1187 Since we can't tell statically if it will branch forward,
1188 always set the prediction bit. */
1189 insn
|= 0x00200000; /* set the prediction bit */
1198 bfd_put_32 (abfd
, insn
, contents
+ isec_offset
);
1199 section_modified
= true;
1203 if (section_modified
)
1205 elf_section_data (isec
)->this_hdr
.contents
= contents
;
1206 free_contents
= NULL
;
1210 if (rela_comb
!= NULL
)
1216 if (free_relocs
!= NULL
)
1222 if (free_contents
!= NULL
)
1224 if (! link_info
->keep_memory
)
1225 free (free_contents
);
1228 /* Cache the section contents for elf_link_input_bfd. */
1229 elf_section_data (isec
)->this_hdr
.contents
= contents
;
1231 free_contents
= NULL
;
1237 if (rela_comb
!= NULL
)
1239 if (free_relocs
!= NULL
)
1241 if (free_contents
!= NULL
)
1242 free (free_contents
);
1247 static reloc_howto_type
*
1248 ppc_elf_reloc_type_lookup (abfd
, code
)
1249 bfd
*abfd ATTRIBUTE_UNUSED
;
1250 bfd_reloc_code_real_type code
;
1252 enum elf_ppc_reloc_type ppc_reloc
= R_PPC_NONE
;
1254 if (!ppc_elf_howto_table
[R_PPC_ADDR32
])
1255 /* Initialize howto table if needed */
1256 ppc_elf_howto_init ();
1261 return (reloc_howto_type
*)NULL
;
1263 case BFD_RELOC_NONE
: ppc_reloc
= R_PPC_NONE
; break;
1264 case BFD_RELOC_32
: ppc_reloc
= R_PPC_ADDR32
; break;
1265 case BFD_RELOC_PPC_BA26
: ppc_reloc
= R_PPC_ADDR24
; break;
1266 case BFD_RELOC_16
: ppc_reloc
= R_PPC_ADDR16
; break;
1267 case BFD_RELOC_LO16
: ppc_reloc
= R_PPC_ADDR16_LO
; break;
1268 case BFD_RELOC_HI16
: ppc_reloc
= R_PPC_ADDR16_HI
; break;
1269 case BFD_RELOC_HI16_S
: ppc_reloc
= R_PPC_ADDR16_HA
; break;
1270 case BFD_RELOC_PPC_BA16
: ppc_reloc
= R_PPC_ADDR14
; break;
1271 case BFD_RELOC_PPC_BA16_BRTAKEN
: ppc_reloc
= R_PPC_ADDR14_BRTAKEN
; break;
1272 case BFD_RELOC_PPC_BA16_BRNTAKEN
: ppc_reloc
= R_PPC_ADDR14_BRNTAKEN
; break;
1273 case BFD_RELOC_PPC_B26
: ppc_reloc
= R_PPC_REL24
; break;
1274 case BFD_RELOC_PPC_B16
: ppc_reloc
= R_PPC_REL14
; break;
1275 case BFD_RELOC_PPC_B16_BRTAKEN
: ppc_reloc
= R_PPC_REL14_BRTAKEN
; break;
1276 case BFD_RELOC_PPC_B16_BRNTAKEN
: ppc_reloc
= R_PPC_REL14_BRNTAKEN
; break;
1277 case BFD_RELOC_16_GOTOFF
: ppc_reloc
= R_PPC_GOT16
; break;
1278 case BFD_RELOC_LO16_GOTOFF
: ppc_reloc
= R_PPC_GOT16_LO
; break;
1279 case BFD_RELOC_HI16_GOTOFF
: ppc_reloc
= R_PPC_GOT16_HI
; break;
1280 case BFD_RELOC_HI16_S_GOTOFF
: ppc_reloc
= R_PPC_GOT16_HA
; break;
1281 case BFD_RELOC_24_PLT_PCREL
: ppc_reloc
= R_PPC_PLTREL24
; break;
1282 case BFD_RELOC_PPC_COPY
: ppc_reloc
= R_PPC_COPY
; break;
1283 case BFD_RELOC_PPC_GLOB_DAT
: ppc_reloc
= R_PPC_GLOB_DAT
; break;
1284 case BFD_RELOC_PPC_LOCAL24PC
: ppc_reloc
= R_PPC_LOCAL24PC
; break;
1285 case BFD_RELOC_32_PCREL
: ppc_reloc
= R_PPC_REL32
; break;
1286 case BFD_RELOC_32_PLTOFF
: ppc_reloc
= R_PPC_PLT32
; break;
1287 case BFD_RELOC_32_PLT_PCREL
: ppc_reloc
= R_PPC_PLTREL32
; break;
1288 case BFD_RELOC_LO16_PLTOFF
: ppc_reloc
= R_PPC_PLT16_LO
; break;
1289 case BFD_RELOC_HI16_PLTOFF
: ppc_reloc
= R_PPC_PLT16_HI
; break;
1290 case BFD_RELOC_HI16_S_PLTOFF
: ppc_reloc
= R_PPC_PLT16_HA
; break;
1291 case BFD_RELOC_GPREL16
: ppc_reloc
= R_PPC_SDAREL16
; break;
1292 case BFD_RELOC_32_BASEREL
: ppc_reloc
= R_PPC_SECTOFF
; break;
1293 case BFD_RELOC_LO16_BASEREL
: ppc_reloc
= R_PPC_SECTOFF_LO
; break;
1294 case BFD_RELOC_HI16_BASEREL
: ppc_reloc
= R_PPC_SECTOFF_HI
; break;
1295 case BFD_RELOC_HI16_S_BASEREL
: ppc_reloc
= R_PPC_SECTOFF_HA
; break;
1296 case BFD_RELOC_CTOR
: ppc_reloc
= R_PPC_ADDR32
; break;
1297 case BFD_RELOC_PPC_TOC16
: ppc_reloc
= R_PPC_TOC16
; break;
1298 case BFD_RELOC_PPC_EMB_NADDR32
: ppc_reloc
= R_PPC_EMB_NADDR32
; break;
1299 case BFD_RELOC_PPC_EMB_NADDR16
: ppc_reloc
= R_PPC_EMB_NADDR16
; break;
1300 case BFD_RELOC_PPC_EMB_NADDR16_LO
: ppc_reloc
= R_PPC_EMB_NADDR16_LO
; break;
1301 case BFD_RELOC_PPC_EMB_NADDR16_HI
: ppc_reloc
= R_PPC_EMB_NADDR16_HI
; break;
1302 case BFD_RELOC_PPC_EMB_NADDR16_HA
: ppc_reloc
= R_PPC_EMB_NADDR16_HA
; break;
1303 case BFD_RELOC_PPC_EMB_SDAI16
: ppc_reloc
= R_PPC_EMB_SDAI16
; break;
1304 case BFD_RELOC_PPC_EMB_SDA2I16
: ppc_reloc
= R_PPC_EMB_SDA2I16
; break;
1305 case BFD_RELOC_PPC_EMB_SDA2REL
: ppc_reloc
= R_PPC_EMB_SDA2REL
; break;
1306 case BFD_RELOC_PPC_EMB_SDA21
: ppc_reloc
= R_PPC_EMB_SDA21
; break;
1307 case BFD_RELOC_PPC_EMB_MRKREF
: ppc_reloc
= R_PPC_EMB_MRKREF
; break;
1308 case BFD_RELOC_PPC_EMB_RELSEC16
: ppc_reloc
= R_PPC_EMB_RELSEC16
; break;
1309 case BFD_RELOC_PPC_EMB_RELST_LO
: ppc_reloc
= R_PPC_EMB_RELST_LO
; break;
1310 case BFD_RELOC_PPC_EMB_RELST_HI
: ppc_reloc
= R_PPC_EMB_RELST_HI
; break;
1311 case BFD_RELOC_PPC_EMB_RELST_HA
: ppc_reloc
= R_PPC_EMB_RELST_HA
; break;
1312 case BFD_RELOC_PPC_EMB_BIT_FLD
: ppc_reloc
= R_PPC_EMB_BIT_FLD
; break;
1313 case BFD_RELOC_PPC_EMB_RELSDA
: ppc_reloc
= R_PPC_EMB_RELSDA
; break;
1314 case BFD_RELOC_VTABLE_INHERIT
: ppc_reloc
= R_PPC_GNU_VTINHERIT
; break;
1315 case BFD_RELOC_VTABLE_ENTRY
: ppc_reloc
= R_PPC_GNU_VTENTRY
; break;
1318 return ppc_elf_howto_table
[ (int)ppc_reloc
];
1321 /* Set the howto pointer for a PowerPC ELF reloc. */
1324 ppc_elf_info_to_howto (abfd
, cache_ptr
, dst
)
1325 bfd
*abfd ATTRIBUTE_UNUSED
;
1327 Elf32_Internal_Rela
*dst
;
1329 if (!ppc_elf_howto_table
[ R_PPC_ADDR32
]) /* Initialize howto table if needed */
1330 ppc_elf_howto_init ();
1332 BFD_ASSERT (ELF32_R_TYPE (dst
->r_info
) < (unsigned int) R_PPC_max
);
1333 cache_ptr
->howto
= ppc_elf_howto_table
[ELF32_R_TYPE (dst
->r_info
)];
1336 /* Handle the R_PPC_ADDR16_HA reloc. */
1338 static bfd_reloc_status_type
1339 ppc_elf_addr16_ha_reloc (abfd
, reloc_entry
, symbol
, data
, input_section
,
1340 output_bfd
, error_message
)
1341 bfd
*abfd ATTRIBUTE_UNUSED
;
1342 arelent
*reloc_entry
;
1344 PTR data ATTRIBUTE_UNUSED
;
1345 asection
*input_section
;
1347 char **error_message ATTRIBUTE_UNUSED
;
1351 if (output_bfd
!= NULL
)
1353 reloc_entry
->address
+= input_section
->output_offset
;
1354 return bfd_reloc_ok
;
1357 if (reloc_entry
->address
> input_section
->_cooked_size
)
1358 return bfd_reloc_outofrange
;
1360 if (bfd_is_com_section (symbol
->section
))
1363 relocation
= symbol
->value
;
1365 relocation
+= symbol
->section
->output_section
->vma
;
1366 relocation
+= symbol
->section
->output_offset
;
1367 relocation
+= reloc_entry
->addend
;
1369 reloc_entry
->addend
+= (relocation
& 0x8000) << 1;
1371 return bfd_reloc_continue
;
1374 /* Function to set whether a module needs the -mrelocatable bit set. */
1377 ppc_elf_set_private_flags (abfd
, flags
)
1381 BFD_ASSERT (!elf_flags_init (abfd
)
1382 || elf_elfheader (abfd
)->e_flags
== flags
);
1384 elf_elfheader (abfd
)->e_flags
= flags
;
1385 elf_flags_init (abfd
) = true;
1389 /* Copy backend specific data from one object module to another */
1391 ppc_elf_copy_private_bfd_data (ibfd
, obfd
)
1395 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1396 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1399 BFD_ASSERT (!elf_flags_init (obfd
)
1400 || elf_elfheader (obfd
)->e_flags
== elf_elfheader (ibfd
)->e_flags
);
1402 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
1403 elf_flags_init (obfd
) = true;
1407 /* Merge backend specific data from an object file to the output
1408 object file when linking */
1410 ppc_elf_merge_private_bfd_data (ibfd
, obfd
)
1418 /* Check if we have the same endianess */
1419 if (_bfd_generic_verify_endian_match (ibfd
, obfd
) == false)
1422 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1423 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1426 new_flags
= elf_elfheader (ibfd
)->e_flags
;
1427 old_flags
= elf_elfheader (obfd
)->e_flags
;
1428 if (!elf_flags_init (obfd
)) /* First call, no flags set */
1430 elf_flags_init (obfd
) = true;
1431 elf_elfheader (obfd
)->e_flags
= new_flags
;
1434 else if (new_flags
== old_flags
) /* Compatible flags are ok */
1437 else /* Incompatible flags */
1439 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib to be linked
1442 if ((new_flags
& EF_PPC_RELOCATABLE
) != 0
1443 && (old_flags
& (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
)) == 0)
1446 (*_bfd_error_handler
)
1447 (_("%s: compiled with -mrelocatable and linked with modules compiled normally"),
1448 bfd_get_filename (ibfd
));
1450 else if ((new_flags
& (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
)) == 0
1451 && (old_flags
& EF_PPC_RELOCATABLE
) != 0)
1454 (*_bfd_error_handler
)
1455 (_("%s: compiled normally and linked with modules compiled with -mrelocatable"),
1456 bfd_get_filename (ibfd
));
1459 /* The output is -mrelocatable-lib iff both the input files are. */
1460 if (! (new_flags
& EF_PPC_RELOCATABLE_LIB
))
1461 elf_elfheader (obfd
)->e_flags
&= ~EF_PPC_RELOCATABLE_LIB
;
1463 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
1464 but each input file is either -mrelocatable or -mrelocatable-lib. */
1465 if (! (elf_elfheader (obfd
)->e_flags
& EF_PPC_RELOCATABLE_LIB
)
1466 && (new_flags
& (EF_PPC_RELOCATABLE_LIB
| EF_PPC_RELOCATABLE
))
1467 && (old_flags
& (EF_PPC_RELOCATABLE_LIB
| EF_PPC_RELOCATABLE
)))
1468 elf_elfheader (obfd
)->e_flags
|= EF_PPC_RELOCATABLE
;
1470 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if any module uses it */
1471 elf_elfheader (obfd
)->e_flags
|= (new_flags
& EF_PPC_EMB
);
1473 new_flags
&= ~ (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
| EF_PPC_EMB
);
1474 old_flags
&= ~ (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
| EF_PPC_EMB
);
1476 /* Warn about any other mismatches */
1477 if (new_flags
!= old_flags
)
1480 (*_bfd_error_handler
)
1481 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
1482 bfd_get_filename (ibfd
), (long)new_flags
, (long)old_flags
);
1487 bfd_set_error (bfd_error_bad_value
);
1496 /* Handle a PowerPC specific section when reading an object file. This
1497 is called when elfcode.h finds a section with an unknown type. */
1500 ppc_elf_section_from_shdr (abfd
, hdr
, name
)
1502 Elf32_Internal_Shdr
*hdr
;
1508 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1511 newsect
= hdr
->bfd_section
;
1512 flags
= bfd_get_section_flags (abfd
, newsect
);
1513 if (hdr
->sh_flags
& SHF_EXCLUDE
)
1514 flags
|= SEC_EXCLUDE
;
1516 if (hdr
->sh_type
== SHT_ORDERED
)
1517 flags
|= SEC_SORT_ENTRIES
;
1519 bfd_set_section_flags (abfd
, newsect
, flags
);
1524 /* Set up any other section flags and such that may be necessary. */
1527 ppc_elf_fake_sections (abfd
, shdr
, asect
)
1528 bfd
*abfd ATTRIBUTE_UNUSED
;
1529 Elf32_Internal_Shdr
*shdr
;
1532 if ((asect
->flags
& SEC_EXCLUDE
) != 0)
1533 shdr
->sh_flags
|= SHF_EXCLUDE
;
1535 if ((asect
->flags
& SEC_SORT_ENTRIES
) != 0)
1536 shdr
->sh_type
= SHT_ORDERED
;
1542 /* Create a special linker section */
1543 static elf_linker_section_t
*
1544 ppc_elf_create_linker_section (abfd
, info
, which
)
1546 struct bfd_link_info
*info
;
1547 enum elf_linker_section_enum which
;
1549 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
1550 elf_linker_section_t
*lsect
;
1552 /* Record the first bfd section that needs the special section */
1554 dynobj
= elf_hash_table (info
)->dynobj
= abfd
;
1556 /* If this is the first time, create the section */
1557 lsect
= elf_linker_section (dynobj
, which
);
1560 elf_linker_section_t defaults
;
1561 static elf_linker_section_t zero_section
;
1563 defaults
= zero_section
;
1564 defaults
.which
= which
;
1565 defaults
.hole_written_p
= false;
1566 defaults
.alignment
= 2;
1568 /* Both of these sections are (technically) created by the user
1569 putting data in them, so they shouldn't be marked
1572 The linker creates them so it has somewhere to attach their
1573 respective symbols. In fact, if they were empty it would
1574 be OK to leave the symbol set to 0 (or any random number), because
1575 the appropriate register should never be used. */
1576 defaults
.flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
1582 (*_bfd_error_handler
) (_("%s: Unknown special linker type %d"),
1583 bfd_get_filename (abfd
),
1586 bfd_set_error (bfd_error_bad_value
);
1587 return (elf_linker_section_t
*)0;
1589 case LINKER_SECTION_SDATA
: /* .sdata/.sbss section */
1590 defaults
.name
= ".sdata";
1591 defaults
.rel_name
= ".rela.sdata";
1592 defaults
.bss_name
= ".sbss";
1593 defaults
.sym_name
= "_SDA_BASE_";
1594 defaults
.sym_offset
= 32768;
1597 case LINKER_SECTION_SDATA2
: /* .sdata2/.sbss2 section */
1598 defaults
.name
= ".sdata2";
1599 defaults
.rel_name
= ".rela.sdata2";
1600 defaults
.bss_name
= ".sbss2";
1601 defaults
.sym_name
= "_SDA2_BASE_";
1602 defaults
.sym_offset
= 32768;
1603 defaults
.flags
|= SEC_READONLY
;
1607 lsect
= _bfd_elf_create_linker_section (abfd
, info
, which
, &defaults
);
1614 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we need to bump up
1615 the number of section headers. */
1618 ppc_elf_additional_program_headers (abfd
)
1626 s
= bfd_get_section_by_name (abfd
, ".interp");
1630 s
= bfd_get_section_by_name (abfd
, ".sbss2");
1631 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0 && s
->_raw_size
> 0)
1634 s
= bfd_get_section_by_name (abfd
, ".PPC.EMB.sbss0");
1635 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0 && s
->_raw_size
> 0)
1641 /* Modify the segment map if needed */
1644 ppc_elf_modify_segment_map (abfd
)
1645 bfd
*abfd ATTRIBUTE_UNUSED
;
1650 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
1651 to output sections (just like _bfd_elf_create_dynamic_sections has
1652 to create .dynbss and .rela.bss). */
1655 ppc_elf_create_dynamic_sections (abfd
, info
)
1657 struct bfd_link_info
*info
;
1659 register asection
*s
;
1662 if (!_bfd_elf_create_dynamic_sections(abfd
, info
))
1665 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1666 | SEC_LINKER_CREATED
);
1668 s
= bfd_make_section (abfd
, ".dynsbss");
1670 || ! bfd_set_section_flags (abfd
, s
, SEC_ALLOC
))
1675 s
= bfd_make_section (abfd
, ".rela.sbss");
1677 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
1678 || ! bfd_set_section_alignment (abfd
, s
, 2))
1684 /* Adjust a symbol defined by a dynamic object and referenced by a
1685 regular object. The current definition is in some section of the
1686 dynamic object, but we're not including those sections. We have to
1687 change the definition to something the rest of the link can
1691 ppc_elf_adjust_dynamic_symbol (info
, h
)
1692 struct bfd_link_info
*info
;
1693 struct elf_link_hash_entry
*h
;
1695 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
1697 unsigned int power_of_two
;
1701 fprintf (stderr
, "ppc_elf_adjust_dynamic_symbol called for %s\n", h
->root
.root
.string
);
1704 /* Make sure we know what is going on here. */
1705 BFD_ASSERT (dynobj
!= NULL
1706 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
)
1707 || h
->weakdef
!= NULL
1708 || ((h
->elf_link_hash_flags
1709 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0
1710 && (h
->elf_link_hash_flags
1711 & ELF_LINK_HASH_REF_REGULAR
) != 0
1712 && (h
->elf_link_hash_flags
1713 & ELF_LINK_HASH_DEF_REGULAR
) == 0)));
1716 /* If this is a function, put it in the procedure linkage table. We
1717 will fill in the contents of the procedure linkage table later,
1718 when we know the address of the .got section. */
1719 if (h
->type
== STT_FUNC
1720 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0)
1722 if (! elf_hash_table (info
)->dynamic_sections_created
1723 || SYMBOL_CALLS_LOCAL (info
, h
)
1724 || (info
->shared
&& h
->plt
.refcount
<= 0))
1726 /* A PLT entry is not required/allowed when:
1728 1. We are not using ld.so; because then the PLT entry
1729 can't be set up, so we can't use one.
1731 2. We know for certain that a call to this symbol
1732 will go to this object.
1734 3. GC has rendered the entry unused.
1735 Note, however, that in an executable all references to the
1736 symbol go to the PLT, so we can't turn it off in that case.
1737 ??? The correct thing to do here is to reference count
1738 all uses of the symbol, not just those to the GOT or PLT. */
1739 h
->plt
.offset
= (bfd_vma
) -1;
1740 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1744 /* Make sure this symbol is output as a dynamic symbol. */
1745 if (h
->dynindx
== -1)
1747 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
1750 BFD_ASSERT (h
->dynindx
!= -1);
1752 s
= bfd_get_section_by_name (dynobj
, ".plt");
1753 BFD_ASSERT (s
!= NULL
);
1755 /* If this is the first .plt entry, make room for the special
1757 if (s
->_raw_size
== 0)
1758 s
->_raw_size
+= PLT_INITIAL_ENTRY_SIZE
;
1760 /* The PowerPC PLT is actually composed of two parts, the first part
1761 is 2 words (for a load and a jump), and then there is a remaining
1762 word available at the end. */
1763 plt_offset
= (PLT_INITIAL_ENTRY_SIZE
1765 * ((s
->_raw_size
- PLT_INITIAL_ENTRY_SIZE
)
1766 / PLT_ENTRY_SIZE
)));
1768 /* If this symbol is not defined in a regular file, and we are
1769 not generating a shared library, then set the symbol to this
1770 location in the .plt. This is required to make function
1771 pointers compare as equal between the normal executable and
1772 the shared library. */
1774 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
1776 h
->root
.u
.def
.section
= s
;
1777 h
->root
.u
.def
.value
= plt_offset
;
1780 h
->plt
.offset
= plt_offset
;
1782 /* Make room for this entry. After the 8192nd entry, room
1783 for two entries is allocated. */
1784 if ((s
->_raw_size
- PLT_INITIAL_ENTRY_SIZE
) / PLT_ENTRY_SIZE
1785 >= PLT_NUM_SINGLE_ENTRIES
)
1786 s
->_raw_size
+= 2 * PLT_ENTRY_SIZE
;
1788 s
->_raw_size
+= PLT_ENTRY_SIZE
;
1790 /* We also need to make an entry in the .rela.plt section. */
1791 s
= bfd_get_section_by_name (dynobj
, ".rela.plt");
1792 BFD_ASSERT (s
!= NULL
);
1793 s
->_raw_size
+= sizeof (Elf32_External_Rela
);
1798 /* If this is a weak symbol, and there is a real definition, the
1799 processor independent code will have arranged for us to see the
1800 real definition first, and we can just use the same value. */
1801 if (h
->weakdef
!= NULL
)
1803 BFD_ASSERT (h
->weakdef
->root
.type
== bfd_link_hash_defined
1804 || h
->weakdef
->root
.type
== bfd_link_hash_defweak
);
1805 h
->root
.u
.def
.section
= h
->weakdef
->root
.u
.def
.section
;
1806 h
->root
.u
.def
.value
= h
->weakdef
->root
.u
.def
.value
;
1810 /* This is a reference to a symbol defined by a dynamic object which
1811 is not a function. */
1813 /* If we are creating a shared library, we must presume that the
1814 only references to the symbol are via the global offset table.
1815 For such cases we need not do anything here; the relocations will
1816 be handled correctly by relocate_section. */
1820 /* We must allocate the symbol in our .dynbss section, which will
1821 become part of the .bss section of the executable. There will be
1822 an entry for this symbol in the .dynsym section. The dynamic
1823 object will contain position independent code, so all references
1824 from the dynamic object to this symbol will go through the global
1825 offset table. The dynamic linker will use the .dynsym entry to
1826 determine the address it must put in the global offset table, so
1827 both the dynamic object and the regular object will refer to the
1828 same memory location for the variable.
1830 Of course, if the symbol is sufficiently small, we must instead
1831 allocate it in .sbss. FIXME: It would be better to do this if and
1832 only if there were actually SDAREL relocs for that symbol. */
1834 if (h
->size
<= elf_gp_size (dynobj
))
1835 s
= bfd_get_section_by_name (dynobj
, ".dynsbss");
1837 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
1838 BFD_ASSERT (s
!= NULL
);
1840 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
1841 copy the initial value out of the dynamic object and into the
1842 runtime process image. We need to remember the offset into the
1843 .rela.bss section we are going to use. */
1844 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1848 if (h
->size
<= elf_gp_size (dynobj
))
1849 srel
= bfd_get_section_by_name (dynobj
, ".rela.sbss");
1851 srel
= bfd_get_section_by_name (dynobj
, ".rela.bss");
1852 BFD_ASSERT (srel
!= NULL
);
1853 srel
->_raw_size
+= sizeof (Elf32_External_Rela
);
1854 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_COPY
;
1857 /* We need to figure out the alignment required for this symbol. I
1858 have no idea how ELF linkers handle this. */
1859 power_of_two
= bfd_log2 (h
->size
);
1860 if (power_of_two
> 4)
1863 /* Apply the required alignment. */
1864 s
->_raw_size
= BFD_ALIGN (s
->_raw_size
,
1865 (bfd_size_type
) (1 << power_of_two
));
1866 if (power_of_two
> bfd_get_section_alignment (dynobj
, s
))
1868 if (! bfd_set_section_alignment (dynobj
, s
, power_of_two
))
1872 /* Define the symbol as being at this point in the section. */
1873 h
->root
.u
.def
.section
= s
;
1874 h
->root
.u
.def
.value
= s
->_raw_size
;
1876 /* Increment the section size to make room for the symbol. */
1877 s
->_raw_size
+= h
->size
;
1883 /* Set the sizes of the dynamic sections. */
1886 ppc_elf_size_dynamic_sections (output_bfd
, info
)
1888 struct bfd_link_info
*info
;
1897 fprintf (stderr
, "ppc_elf_size_dynamic_sections called\n");
1900 dynobj
= elf_hash_table (info
)->dynobj
;
1901 BFD_ASSERT (dynobj
!= NULL
);
1903 if (elf_hash_table (info
)->dynamic_sections_created
)
1905 /* Set the contents of the .interp section to the interpreter. */
1908 s
= bfd_get_section_by_name (dynobj
, ".interp");
1909 BFD_ASSERT (s
!= NULL
);
1910 s
->_raw_size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1911 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1916 /* We may have created entries in the .rela.got, .rela.sdata, and
1917 .rela.sdata2 sections. However, if we are not creating the
1918 dynamic sections, we will not actually use these entries. Reset
1919 the size of .rela.got, et al, which will cause it to get
1920 stripped from the output file below. */
1921 static char *rela_sections
[] = { ".rela.got", ".rela.sdata",
1922 ".rela.sdata2", ".rela.sbss",
1926 for (p
= rela_sections
; *p
!= (char *)0; p
++)
1928 s
= bfd_get_section_by_name (dynobj
, *p
);
1934 /* The check_relocs and adjust_dynamic_symbol entry points have
1935 determined the sizes of the various dynamic sections. Allocate
1940 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1945 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1948 /* It's OK to base decisions on the section name, because none
1949 of the dynobj section names depend upon the input files. */
1950 name
= bfd_get_section_name (dynobj
, s
);
1954 if (strcmp (name
, ".plt") == 0)
1956 if (s
->_raw_size
== 0)
1958 /* Strip this section if we don't need it; see the
1964 /* Remember whether there is a PLT. */
1968 else if (strncmp (name
, ".rela", 5) == 0)
1970 if (s
->_raw_size
== 0)
1972 /* If we don't need this section, strip it from the
1973 output file. This is mostly to handle .rela.bss and
1974 .rela.plt. We must create both sections in
1975 create_dynamic_sections, because they must be created
1976 before the linker maps input sections to output
1977 sections. The linker does that before
1978 adjust_dynamic_symbol is called, and it is that
1979 function which decides whether anything needs to go
1980 into these sections. */
1986 const char *outname
;
1988 /* Remember whether there are any relocation sections. */
1991 /* If this relocation section applies to a read only
1992 section, then we probably need a DT_TEXTREL entry. */
1993 outname
= bfd_get_section_name (output_bfd
,
1995 target
= bfd_get_section_by_name (output_bfd
, outname
+ 5);
1997 && (target
->flags
& SEC_READONLY
) != 0
1998 && (target
->flags
& SEC_ALLOC
) != 0)
2001 /* We use the reloc_count field as a counter if we need
2002 to copy relocs into the output file. */
2006 else if (strcmp (name
, ".got") != 0
2007 && strcmp (name
, ".sdata") != 0
2008 && strcmp (name
, ".sdata2") != 0)
2010 /* It's not one of our sections, so don't allocate space. */
2016 _bfd_strip_section_from_output (info
, s
);
2020 /* Allocate memory for the section contents. */
2021 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->_raw_size
);
2022 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
2026 if (elf_hash_table (info
)->dynamic_sections_created
)
2028 /* Add some entries to the .dynamic section. We fill in the
2029 values later, in ppc_elf_finish_dynamic_sections, but we
2030 must add the entries now so that we get the correct size for
2031 the .dynamic section. The DT_DEBUG entry is filled in by the
2032 dynamic linker and used by the debugger. */
2035 if (! bfd_elf32_add_dynamic_entry (info
, DT_DEBUG
, 0))
2041 if (! bfd_elf32_add_dynamic_entry (info
, DT_PLTGOT
, 0)
2042 || ! bfd_elf32_add_dynamic_entry (info
, DT_PLTRELSZ
, 0)
2043 || ! bfd_elf32_add_dynamic_entry (info
, DT_PLTREL
, DT_RELA
)
2044 || ! bfd_elf32_add_dynamic_entry (info
, DT_JMPREL
, 0))
2050 if (! bfd_elf32_add_dynamic_entry (info
, DT_RELA
, 0)
2051 || ! bfd_elf32_add_dynamic_entry (info
, DT_RELASZ
, 0)
2052 || ! bfd_elf32_add_dynamic_entry (info
, DT_RELAENT
,
2053 sizeof (Elf32_External_Rela
)))
2059 if (! bfd_elf32_add_dynamic_entry (info
, DT_TEXTREL
, 0))
2061 info
->flags
|= DF_TEXTREL
;
2069 /* Look through the relocs for a section during the first phase, and
2070 allocate space in the global offset table or procedure linkage
2074 ppc_elf_check_relocs (abfd
, info
, sec
, relocs
)
2076 struct bfd_link_info
*info
;
2078 const Elf_Internal_Rela
*relocs
;
2081 Elf_Internal_Shdr
*symtab_hdr
;
2082 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
2083 const Elf_Internal_Rela
*rel
;
2084 const Elf_Internal_Rela
*rel_end
;
2085 bfd_signed_vma
*local_got_refcounts
;
2086 elf_linker_section_t
*sdata
;
2087 elf_linker_section_t
*sdata2
;
2089 asection
*sgot
= NULL
;
2090 asection
*srelgot
= NULL
;
2092 if (info
->relocateable
)
2096 fprintf (stderr
, "ppc_elf_check_relocs called for section %s in %s\n",
2097 bfd_get_section_name (abfd
, sec
),
2098 bfd_get_filename (abfd
));
2101 /* Create the linker generated sections all the time so that the
2102 special symbols are created. */
2104 if ((sdata
= elf_linker_section (abfd
, LINKER_SECTION_SDATA
)) == NULL
)
2106 sdata
= ppc_elf_create_linker_section (abfd
, info
, LINKER_SECTION_SDATA
);
2112 if ((sdata2
= elf_linker_section (abfd
, LINKER_SECTION_SDATA2
)) == NULL
)
2114 sdata2
= ppc_elf_create_linker_section (abfd
, info
, LINKER_SECTION_SDATA2
);
2119 dynobj
= elf_hash_table (info
)->dynobj
;
2120 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2121 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2123 sym_hashes
= elf_sym_hashes (abfd
);
2124 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof(Elf32_External_Sym
);
2125 if (!elf_bad_symtab (abfd
))
2126 sym_hashes_end
-= symtab_hdr
->sh_info
;
2130 rel_end
= relocs
+ sec
->reloc_count
;
2131 for (rel
= relocs
; rel
< rel_end
; rel
++)
2133 unsigned long r_symndx
;
2134 struct elf_link_hash_entry
*h
;
2136 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2137 if (r_symndx
< symtab_hdr
->sh_info
)
2140 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2142 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
2143 This shows up in particular in an R_PPC_ADDR32 in the eabi
2145 if (h
&& strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
2150 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
2151 if (! _bfd_elf_create_got_section (dynobj
, info
))
2153 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2154 BFD_ASSERT (sgot
!= NULL
);
2158 switch (ELF32_R_TYPE (rel
->r_info
))
2160 /* GOT16 relocations */
2162 case R_PPC_GOT16_LO
:
2163 case R_PPC_GOT16_HI
:
2164 case R_PPC_GOT16_HA
:
2165 /* This symbol requires a global offset table entry. */
2170 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
2171 if (! _bfd_elf_create_got_section (dynobj
, info
))
2173 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2174 BFD_ASSERT (sgot
!= NULL
);
2178 && (h
!= NULL
|| info
->shared
))
2180 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
2181 if (srelgot
== NULL
)
2183 srelgot
= bfd_make_section (dynobj
, ".rela.got");
2185 || ! bfd_set_section_flags (dynobj
, srelgot
,
2190 | SEC_LINKER_CREATED
2192 || ! bfd_set_section_alignment (dynobj
, srelgot
, 2))
2199 if (h
->got
.refcount
== -1)
2201 /* Make sure this symbol is output as a dynamic symbol. */
2202 if (h
->dynindx
== -1)
2203 if (!bfd_elf32_link_record_dynamic_symbol (info
, h
))
2206 /* Allocate space in the .got. */
2207 sgot
->_raw_size
+= 4;
2208 /* Allocate relocation space. */
2209 srelgot
->_raw_size
+= sizeof (Elf32_External_Rela
);
2211 h
->got
.refcount
= 1;
2218 /* This is a global offset table entry for a local symbol. */
2219 if (local_got_refcounts
== NULL
)
2223 size
= symtab_hdr
->sh_info
* sizeof (bfd_signed_vma
);
2224 local_got_refcounts
= (bfd_signed_vma
*)
2225 bfd_alloc (abfd
, size
);
2226 if (local_got_refcounts
== NULL
)
2228 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2229 memset (local_got_refcounts
, -1, size
);
2231 if (local_got_refcounts
[r_symndx
] == -1)
2233 sgot
->_raw_size
+= 4;
2235 /* If we are generating a shared object, we need to
2236 output a R_PPC_RELATIVE reloc so that the
2237 dynamic linker can adjust this GOT entry. */
2239 srelgot
->_raw_size
+= sizeof (Elf32_External_Rela
);
2241 local_got_refcounts
[r_symndx
] = 1;
2244 local_got_refcounts
[r_symndx
]++;
2248 /* Indirect .sdata relocation */
2249 case R_PPC_EMB_SDAI16
:
2252 ((*_bfd_error_handler
)
2253 (_("%s: relocation %s cannot be used when making a shared object"),
2254 bfd_get_filename (abfd
), "R_PPC_EMB_SDAI16"));
2258 if (srelgot
== NULL
&& (h
!= NULL
|| info
->shared
))
2260 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
2261 if (srelgot
== NULL
)
2263 srelgot
= bfd_make_section (dynobj
, ".rela.got");
2265 || ! bfd_set_section_flags (dynobj
, srelgot
,
2270 | SEC_LINKER_CREATED
2272 || ! bfd_set_section_alignment (dynobj
, srelgot
, 2))
2277 if (!bfd_elf32_create_pointer_linker_section (abfd
, info
, sdata
, h
, rel
))
2282 /* Indirect .sdata2 relocation */
2283 case R_PPC_EMB_SDA2I16
:
2286 ((*_bfd_error_handler
)
2287 (_("%s: relocation %s cannot be used when making a shared object"),
2288 bfd_get_filename (abfd
), "R_PPC_EMB_SDA2I16"));
2292 if (srelgot
== NULL
&& (h
!= NULL
|| info
->shared
))
2294 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
2295 if (srelgot
== NULL
)
2297 srelgot
= bfd_make_section (dynobj
, ".rela.got");
2299 || ! bfd_set_section_flags (dynobj
, srelgot
,
2304 | SEC_LINKER_CREATED
2306 || ! bfd_set_section_alignment (dynobj
, srelgot
, 2))
2311 if (!bfd_elf32_create_pointer_linker_section (abfd
, info
, sdata2
, h
, rel
))
2316 case R_PPC_SDAREL16
:
2317 case R_PPC_EMB_SDA2REL
:
2318 case R_PPC_EMB_SDA21
:
2321 ((*_bfd_error_handler
)
2322 (_("%s: relocation %s cannot be used when making a shared object"),
2323 bfd_get_filename (abfd
),
2324 ppc_elf_howto_table
[(int)ELF32_R_TYPE (rel
->r_info
)]->name
));
2330 case R_PPC_PLTREL24
:
2331 case R_PPC_PLT16_LO
:
2332 case R_PPC_PLT16_HI
:
2333 case R_PPC_PLT16_HA
:
2335 fprintf (stderr
, "Reloc requires a PLT entry\n");
2337 /* This symbol requires a procedure linkage table entry. We
2338 actually build the entry in adjust_dynamic_symbol,
2339 because this might be a case of linking PIC code without
2340 linking in any dynamic objects, in which case we don't
2341 need to generate a procedure linkage table after all. */
2345 /* It does not make sense to have a procedure linkage
2346 table entry for a local symbol. */
2347 bfd_set_error (bfd_error_bad_value
);
2351 /* Make sure this symbol is output as a dynamic symbol. */
2352 if (h
->dynindx
== -1)
2354 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
2357 if (h
->plt
.refcount
== -1)
2359 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
2360 h
->plt
.refcount
= 1;
2366 /* The following relocations don't need to propagate the
2367 relocation if linking a shared object since they are
2368 section relative. */
2370 case R_PPC_SECTOFF_LO
:
2371 case R_PPC_SECTOFF_HI
:
2372 case R_PPC_SECTOFF_HA
:
2375 /* This refers only to functions defined in the shared library */
2376 case R_PPC_LOCAL24PC
:
2379 /* This relocation describes the C++ object vtable hierarchy.
2380 Reconstruct it for later use during GC. */
2381 case R_PPC_GNU_VTINHERIT
:
2382 if (!_bfd_elf32_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2386 /* This relocation describes which C++ vtable entries are actually
2387 used. Record for later use during GC. */
2388 case R_PPC_GNU_VTENTRY
:
2389 if (!_bfd_elf32_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2393 /* When creating a shared object, we must copy these
2394 relocs into the output file. We create a reloc
2395 section in dynobj and make room for the reloc. */
2398 case R_PPC_REL14_BRTAKEN
:
2399 case R_PPC_REL14_BRNTAKEN
:
2402 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
2403 || SYMBOL_REFERENCES_LOCAL (info
, h
))
2411 fprintf (stderr
, "ppc_elf_check_relocs need to create relocation for %s\n",
2412 (h
&& h
->root
.root
.string
) ? h
->root
.root
.string
: "<unknown>");
2418 name
= (bfd_elf_string_from_elf_section
2420 elf_elfheader (abfd
)->e_shstrndx
,
2421 elf_section_data (sec
)->rel_hdr
.sh_name
));
2425 BFD_ASSERT (strncmp (name
, ".rela", 5) == 0
2426 && strcmp (bfd_get_section_name (abfd
, sec
),
2429 sreloc
= bfd_get_section_by_name (dynobj
, name
);
2434 sreloc
= bfd_make_section (dynobj
, name
);
2435 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
2436 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
2437 if ((sec
->flags
& SEC_ALLOC
) != 0)
2438 flags
|= SEC_ALLOC
| SEC_LOAD
;
2440 || ! bfd_set_section_flags (dynobj
, sreloc
, flags
)
2441 || ! bfd_set_section_alignment (dynobj
, sreloc
, 2))
2446 sreloc
->_raw_size
+= sizeof (Elf32_External_Rela
);
2448 /* FIXME: We should here do what the m68k and i386
2449 backends do: if the reloc is pc-relative, record it
2450 in case it turns out that the reloc is unnecessary
2451 because the symbol is forced local by versioning or
2452 we are linking with -Bdynamic. Fortunately this
2453 case is not frequent. */
2463 /* Return the section that should be marked against GC for a given
2467 ppc_elf_gc_mark_hook (abfd
, info
, rel
, h
, sym
)
2469 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2470 Elf_Internal_Rela
*rel
;
2471 struct elf_link_hash_entry
*h
;
2472 Elf_Internal_Sym
*sym
;
2476 switch (ELF32_R_TYPE (rel
->r_info
))
2478 case R_PPC_GNU_VTINHERIT
:
2479 case R_PPC_GNU_VTENTRY
:
2483 switch (h
->root
.type
)
2485 case bfd_link_hash_defined
:
2486 case bfd_link_hash_defweak
:
2487 return h
->root
.u
.def
.section
;
2489 case bfd_link_hash_common
:
2490 return h
->root
.u
.c
.p
->section
;
2499 if (!(elf_bad_symtab (abfd
)
2500 && ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
2501 && ! ((sym
->st_shndx
<= 0 || sym
->st_shndx
>= SHN_LORESERVE
)
2502 && sym
->st_shndx
!= SHN_COMMON
))
2504 return bfd_section_from_elf_index (abfd
, sym
->st_shndx
);
2511 /* Update the got entry reference counts for the section being removed. */
2514 ppc_elf_gc_sweep_hook (abfd
, info
, sec
, relocs
)
2516 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2518 const Elf_Internal_Rela
*relocs
;
2520 Elf_Internal_Shdr
*symtab_hdr
;
2521 struct elf_link_hash_entry
**sym_hashes
;
2522 bfd_signed_vma
*local_got_refcounts
;
2523 const Elf_Internal_Rela
*rel
, *relend
;
2524 unsigned long r_symndx
;
2525 struct elf_link_hash_entry
*h
;
2527 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2528 sym_hashes
= elf_sym_hashes (abfd
);
2529 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2531 relend
= relocs
+ sec
->reloc_count
;
2532 for (rel
= relocs
; rel
< relend
; rel
++)
2533 switch (ELF32_R_TYPE (rel
->r_info
))
2536 case R_PPC_GOT16_LO
:
2537 case R_PPC_GOT16_HI
:
2538 case R_PPC_GOT16_HA
:
2539 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2540 if (r_symndx
>= symtab_hdr
->sh_info
)
2542 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2543 if (h
->got
.refcount
> 0)
2546 else if (local_got_refcounts
!= NULL
)
2548 if (local_got_refcounts
[r_symndx
] > 0)
2549 local_got_refcounts
[r_symndx
]--;
2554 case R_PPC_PLTREL24
:
2555 case R_PPC_PLT16_LO
:
2556 case R_PPC_PLT16_HI
:
2557 case R_PPC_PLT16_HA
:
2558 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2559 if (r_symndx
>= symtab_hdr
->sh_info
)
2561 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2562 if (h
->plt
.refcount
> 0)
2574 /* Hook called by the linker routine which adds symbols from an object
2575 file. We use it to put .comm items in .sbss, and not .bss. */
2579 ppc_elf_add_symbol_hook (abfd
, info
, sym
, namep
, flagsp
, secp
, valp
)
2581 struct bfd_link_info
*info
;
2582 const Elf_Internal_Sym
*sym
;
2583 const char **namep ATTRIBUTE_UNUSED
;
2584 flagword
*flagsp ATTRIBUTE_UNUSED
;
2588 if (sym
->st_shndx
== SHN_COMMON
2589 && !info
->relocateable
2590 && sym
->st_size
<= (bfd_vma
) bfd_get_gp_size (abfd
))
2592 /* Common symbols less than or equal to -G nn bytes are automatically
2594 elf_linker_section_t
*sdata
2595 = ppc_elf_create_linker_section (abfd
, info
, LINKER_SECTION_SDATA
);
2597 if (!sdata
->bss_section
)
2599 /* We don't go through bfd_make_section, because we don't
2600 want to attach this common section to DYNOBJ. The linker
2601 will move the symbols to the appropriate output section
2602 when it defines common symbols. */
2603 sdata
->bss_section
= ((asection
*)
2604 bfd_zalloc (abfd
, sizeof (asection
)));
2605 if (sdata
->bss_section
== NULL
)
2607 sdata
->bss_section
->name
= sdata
->bss_name
;
2608 sdata
->bss_section
->flags
= SEC_IS_COMMON
;
2609 sdata
->bss_section
->output_section
= sdata
->bss_section
;
2610 sdata
->bss_section
->symbol
=
2611 (asymbol
*) bfd_zalloc (abfd
, sizeof (asymbol
));
2612 sdata
->bss_section
->symbol_ptr_ptr
=
2613 (asymbol
**) bfd_zalloc (abfd
, sizeof (asymbol
*));
2614 if (sdata
->bss_section
->symbol
== NULL
2615 || sdata
->bss_section
->symbol_ptr_ptr
== NULL
)
2617 sdata
->bss_section
->symbol
->name
= sdata
->bss_name
;
2618 sdata
->bss_section
->symbol
->flags
= BSF_SECTION_SYM
;
2619 sdata
->bss_section
->symbol
->section
= sdata
->bss_section
;
2620 *sdata
->bss_section
->symbol_ptr_ptr
= sdata
->bss_section
->symbol
;
2623 *secp
= sdata
->bss_section
;
2624 *valp
= sym
->st_size
;
2631 /* Finish up dynamic symbol handling. We set the contents of various
2632 dynamic sections here. */
2635 ppc_elf_finish_dynamic_symbol (output_bfd
, info
, h
, sym
)
2637 struct bfd_link_info
*info
;
2638 struct elf_link_hash_entry
*h
;
2639 Elf_Internal_Sym
*sym
;
2644 fprintf (stderr
, "ppc_elf_finish_dynamic_symbol called for %s",
2645 h
->root
.root
.string
);
2648 dynobj
= elf_hash_table (info
)->dynobj
;
2649 BFD_ASSERT (dynobj
!= NULL
);
2651 if (h
->plt
.offset
!= (bfd_vma
) -1)
2655 Elf_Internal_Rela rela
;
2656 bfd_vma reloc_index
;
2659 fprintf (stderr
, ", plt_offset = %d", h
->plt
.offset
);
2662 /* This symbol has an entry in the procedure linkage table. Set
2665 BFD_ASSERT (h
->dynindx
!= -1);
2667 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2668 srela
= bfd_get_section_by_name (dynobj
, ".rela.plt");
2669 BFD_ASSERT (splt
!= NULL
&& srela
!= NULL
);
2671 /* We don't need to fill in the .plt. The ppc dynamic linker
2674 /* Fill in the entry in the .rela.plt section. */
2675 rela
.r_offset
= (splt
->output_section
->vma
2676 + splt
->output_offset
2678 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_PPC_JMP_SLOT
);
2681 reloc_index
= (h
->plt
.offset
- PLT_INITIAL_ENTRY_SIZE
) / PLT_SLOT_SIZE
;
2682 if (reloc_index
> PLT_NUM_SINGLE_ENTRIES
)
2683 reloc_index
-= (reloc_index
- PLT_NUM_SINGLE_ENTRIES
) / 2;
2684 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
2685 ((Elf32_External_Rela
*) srela
->contents
2688 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2690 /* Mark the symbol as undefined, rather than as defined in
2691 the .plt section. Leave the value alone. */
2692 sym
->st_shndx
= SHN_UNDEF
;
2693 /* If the symbol is weak, we do need to clear the value.
2694 Otherwise, the PLT entry would provide a definition for
2695 the symbol even if the symbol wasn't defined anywhere,
2696 and so the symbol would never be NULL. */
2697 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR_NONWEAK
)
2703 if (h
->got
.offset
!= (bfd_vma
) -1)
2707 Elf_Internal_Rela rela
;
2709 /* This symbol has an entry in the global offset table. Set it
2712 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2713 srela
= bfd_get_section_by_name (dynobj
, ".rela.got");
2714 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
2716 rela
.r_offset
= (sgot
->output_section
->vma
2717 + sgot
->output_offset
2718 + (h
->got
.offset
&~ 1));
2720 /* If this is a -Bsymbolic link, and the symbol is defined
2721 locally, we just want to emit a RELATIVE reloc. The entry in
2722 the global offset table will already have been initialized in
2723 the relocate_section function. */
2725 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2727 rela
.r_info
= ELF32_R_INFO (0, R_PPC_RELATIVE
);
2728 rela
.r_addend
= (h
->root
.u
.def
.value
2729 + h
->root
.u
.def
.section
->output_section
->vma
2730 + h
->root
.u
.def
.section
->output_offset
);
2734 BFD_ASSERT((h
->got
.offset
& 1) == 0);
2735 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ h
->got
.offset
);
2736 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_PPC_GLOB_DAT
);
2740 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
2741 ((Elf32_External_Rela
*) srela
->contents
2742 + srela
->reloc_count
));
2743 ++srela
->reloc_count
;
2746 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_COPY
) != 0)
2749 Elf_Internal_Rela rela
;
2751 /* This symbols needs a copy reloc. Set it up. */
2754 fprintf (stderr
, ", copy");
2757 BFD_ASSERT (h
->dynindx
!= -1);
2759 if (h
->size
<= elf_gp_size (dynobj
))
2760 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
2763 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
2765 BFD_ASSERT (s
!= NULL
);
2767 rela
.r_offset
= (h
->root
.u
.def
.value
2768 + h
->root
.u
.def
.section
->output_section
->vma
2769 + h
->root
.u
.def
.section
->output_offset
);
2770 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_PPC_COPY
);
2772 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
2773 ((Elf32_External_Rela
*) s
->contents
2779 fprintf (stderr
, "\n");
2782 /* Mark some specially defined symbols as absolute. */
2783 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
2784 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
2785 || strcmp (h
->root
.root
.string
, "_PROCEDURE_LINKAGE_TABLE_") == 0)
2786 sym
->st_shndx
= SHN_ABS
;
2792 /* Finish up the dynamic sections. */
2795 ppc_elf_finish_dynamic_sections (output_bfd
, info
)
2797 struct bfd_link_info
*info
;
2800 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
2801 asection
*sgot
= bfd_get_section_by_name (dynobj
, ".got");
2804 fprintf (stderr
, "ppc_elf_finish_dynamic_sections called\n");
2807 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
2809 if (elf_hash_table (info
)->dynamic_sections_created
)
2812 Elf32_External_Dyn
*dyncon
, *dynconend
;
2814 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2815 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
2817 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
2818 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->_raw_size
);
2819 for (; dyncon
< dynconend
; dyncon
++)
2821 Elf_Internal_Dyn dyn
;
2825 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
2829 case DT_PLTGOT
: name
= ".plt"; size
= false; break;
2830 case DT_PLTRELSZ
: name
= ".rela.plt"; size
= true; break;
2831 case DT_JMPREL
: name
= ".rela.plt"; size
= false; break;
2832 default: name
= NULL
; size
= false; break;
2839 s
= bfd_get_section_by_name (output_bfd
, name
);
2845 dyn
.d_un
.d_ptr
= s
->vma
;
2848 if (s
->_cooked_size
!= 0)
2849 dyn
.d_un
.d_val
= s
->_cooked_size
;
2851 dyn
.d_un
.d_val
= s
->_raw_size
;
2854 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2859 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
2860 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
2863 unsigned char *contents
= sgot
->contents
;
2864 bfd_put_32 (output_bfd
, 0x4e800021 /* blrl */, contents
);
2867 bfd_put_32 (output_bfd
, (bfd_vma
) 0, contents
+4);
2869 bfd_put_32 (output_bfd
,
2870 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
2873 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
2880 /* The RELOCATE_SECTION function is called by the ELF backend linker
2881 to handle the relocations for a section.
2883 The relocs are always passed as Rela structures; if the section
2884 actually uses Rel structures, the r_addend field will always be
2887 This function is responsible for adjust the section contents as
2888 necessary, and (if using Rela relocs and generating a
2889 relocateable output file) adjusting the reloc addend as
2892 This function does not have to worry about setting the reloc
2893 address or the reloc symbol index.
2895 LOCAL_SYMS is a pointer to the swapped in local symbols.
2897 LOCAL_SECTIONS is an array giving the section in the input file
2898 corresponding to the st_shndx field of each local symbol.
2900 The global hash table entry for the global symbols can be found
2901 via elf_sym_hashes (input_bfd).
2903 When generating relocateable output, this function must handle
2904 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2905 going to be the section symbol corresponding to the output
2906 section, which means that the addend must be adjusted
2910 ppc_elf_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
2911 contents
, relocs
, local_syms
, local_sections
)
2913 struct bfd_link_info
*info
;
2915 asection
*input_section
;
2917 Elf_Internal_Rela
*relocs
;
2918 Elf_Internal_Sym
*local_syms
;
2919 asection
**local_sections
;
2921 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2922 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
2923 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
2924 elf_linker_section_t
*sdata
= (dynobj
) ? elf_linker_section (dynobj
, LINKER_SECTION_SDATA
) : NULL
;
2925 elf_linker_section_t
*sdata2
= (dynobj
) ? elf_linker_section (dynobj
, LINKER_SECTION_SDATA2
) : NULL
;
2926 Elf_Internal_Rela
*rel
= relocs
;
2927 Elf_Internal_Rela
*relend
= relocs
+ input_section
->reloc_count
;
2928 asection
*sreloc
= NULL
;
2931 bfd_vma
*local_got_offsets
;
2936 fprintf (stderr
, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n",
2937 bfd_get_filename (input_bfd
),
2938 bfd_section_name(input_bfd
, input_section
),
2939 (long)input_section
->reloc_count
,
2940 (info
->relocateable
) ? " (relocatable)" : "");
2943 if (!ppc_elf_howto_table
[ R_PPC_ADDR32
]) /* Initialize howto table if needed */
2944 ppc_elf_howto_init ();
2946 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2951 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2952 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2955 for (; rel
< relend
; rel
++)
2957 enum elf_ppc_reloc_type r_type
= (enum elf_ppc_reloc_type
)ELF32_R_TYPE (rel
->r_info
);
2958 bfd_vma offset
= rel
->r_offset
;
2959 bfd_vma addend
= rel
->r_addend
;
2960 bfd_reloc_status_type r
= bfd_reloc_other
;
2961 Elf_Internal_Sym
*sym
= (Elf_Internal_Sym
*)0;
2962 asection
*sec
= (asection
*)0;
2963 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*)0;
2964 const char *sym_name
= (const char *)0;
2965 reloc_howto_type
*howto
;
2966 unsigned long r_symndx
;
2968 int will_become_local
;
2970 /* Unknown relocation handling */
2971 if ((unsigned)r_type
>= (unsigned)R_PPC_max
|| !ppc_elf_howto_table
[(int)r_type
])
2973 (*_bfd_error_handler
) (_("%s: unknown relocation type %d"),
2974 bfd_get_filename (input_bfd
),
2977 bfd_set_error (bfd_error_bad_value
);
2982 howto
= ppc_elf_howto_table
[(int)r_type
];
2983 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2985 if (info
->relocateable
)
2987 /* This is a relocateable link. We don't have to change
2988 anything, unless the reloc is against a section symbol,
2989 in which case we have to adjust according to where the
2990 section symbol winds up in the output section. */
2991 if (r_symndx
< symtab_hdr
->sh_info
)
2993 sym
= local_syms
+ r_symndx
;
2994 if ((unsigned)ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
2996 sec
= local_sections
[r_symndx
];
2997 addend
= rel
->r_addend
+= sec
->output_offset
+ sym
->st_value
;
3002 fprintf (stderr
, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
3012 /* This is a final link. */
3013 if (r_symndx
< symtab_hdr
->sh_info
)
3015 sym
= local_syms
+ r_symndx
;
3016 sec
= local_sections
[r_symndx
];
3017 sym_name
= "<local symbol>";
3019 relocation
= (sec
->output_section
->vma
3020 + sec
->output_offset
3022 /* Relocs to local symbols are always resolved. */
3023 will_become_local
= 1;
3027 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3028 while (h
->root
.type
== bfd_link_hash_indirect
3029 || h
->root
.type
== bfd_link_hash_warning
)
3030 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3031 sym_name
= h
->root
.root
.string
;
3033 /* Can this relocation be resolved immediately? */
3034 will_become_local
= SYMBOL_REFERENCES_LOCAL (info
, h
);
3036 if (h
->root
.type
== bfd_link_hash_defined
3037 || h
->root
.type
== bfd_link_hash_defweak
)
3039 sec
= h
->root
.u
.def
.section
;
3040 if (((r_type
== R_PPC_PLT32
3041 || r_type
== R_PPC_PLTREL24
)
3043 && h
->plt
.offset
!= (bfd_vma
) -1)
3044 || (r_type
== R_PPC_LOCAL24PC
3045 && sec
->output_section
== NULL
)
3046 || ((r_type
== R_PPC_GOT16
3047 || r_type
== R_PPC_GOT16_LO
3048 || r_type
== R_PPC_GOT16_HI
3049 || r_type
== R_PPC_GOT16_HA
)
3050 && elf_hash_table (info
)->dynamic_sections_created
3051 && (! info
->shared
|| ! will_become_local
))
3053 && ! will_become_local
3054 && ((input_section
->flags
& SEC_ALLOC
) != 0
3055 /* Testing SEC_DEBUGGING here may be wrong.
3056 It's here to avoid a crash when
3057 generating a shared library with DWARF
3058 debugging information. */
3059 || ((input_section
->flags
& SEC_DEBUGGING
) != 0
3060 && (h
->elf_link_hash_flags
3061 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0))
3062 && (r_type
== R_PPC_ADDR32
3063 || r_type
== R_PPC_ADDR24
3064 || r_type
== R_PPC_ADDR16
3065 || r_type
== R_PPC_ADDR16_LO
3066 || r_type
== R_PPC_ADDR16_HI
3067 || r_type
== R_PPC_ADDR16_HA
3068 || r_type
== R_PPC_ADDR14
3069 || r_type
== R_PPC_ADDR14_BRTAKEN
3070 || r_type
== R_PPC_ADDR14_BRNTAKEN
3071 || r_type
== R_PPC_COPY
3072 || r_type
== R_PPC_GLOB_DAT
3073 || r_type
== R_PPC_JMP_SLOT
3074 || r_type
== R_PPC_UADDR32
3075 || r_type
== R_PPC_UADDR16
3076 || r_type
== R_PPC_SDAREL16
3077 || r_type
== R_PPC_EMB_NADDR32
3078 || r_type
== R_PPC_EMB_NADDR16
3079 || r_type
== R_PPC_EMB_NADDR16_LO
3080 || r_type
== R_PPC_EMB_NADDR16_HI
3081 || r_type
== R_PPC_EMB_NADDR16_HA
3082 || r_type
== R_PPC_EMB_SDAI16
3083 || r_type
== R_PPC_EMB_SDA2I16
3084 || r_type
== R_PPC_EMB_SDA2REL
3085 || r_type
== R_PPC_EMB_SDA21
3086 || r_type
== R_PPC_EMB_MRKREF
3087 || r_type
== R_PPC_EMB_BIT_FLD
3088 || r_type
== R_PPC_EMB_RELSDA
3089 || ((r_type
== R_PPC_REL24
3090 || r_type
== R_PPC_REL32
3091 || r_type
== R_PPC_REL14
3092 || r_type
== R_PPC_REL14_BRTAKEN
3093 || r_type
== R_PPC_REL14_BRNTAKEN
3094 || r_type
== R_PPC_RELATIVE
)
3095 && strcmp (h
->root
.root
.string
,
3096 "_GLOBAL_OFFSET_TABLE_") != 0))))
3098 /* In these cases, we don't need the relocation
3099 value. We check specially because in some
3100 obscure cases sec->output_section will be NULL. */
3103 else if (sec
->output_section
== NULL
)
3105 (*_bfd_error_handler
)
3106 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
3107 bfd_get_filename (input_bfd
), h
->root
.root
.string
,
3108 bfd_get_section_name (input_bfd
, input_section
));
3112 relocation
= (h
->root
.u
.def
.value
3113 + sec
->output_section
->vma
3114 + sec
->output_offset
);
3116 else if (h
->root
.type
== bfd_link_hash_undefweak
)
3118 else if (info
->shared
&& !info
->symbolic
&& !info
->no_undefined
3119 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
3123 if (! (*info
->callbacks
->undefined_symbol
)(info
,
3124 h
->root
.root
.string
,
3129 || info
->no_undefined
3130 || ELF_ST_VISIBILITY (h
->other
))))
3136 switch ((int)r_type
)
3139 (*_bfd_error_handler
) (_("%s: unknown relocation type %d for symbol %s"),
3140 bfd_get_filename (input_bfd
),
3141 (int)r_type
, sym_name
);
3143 bfd_set_error (bfd_error_bad_value
);
3147 /* Relocations that need no special processing. */
3148 case (int)R_PPC_LOCAL24PC
:
3149 /* It makes no sense to point a local relocation
3150 at a symbol not in this object. */
3152 && (h
->root
.type
== bfd_link_hash_defined
3153 || h
->root
.type
== bfd_link_hash_defweak
)
3154 && sec
->output_section
== NULL
)
3156 if (! (*info
->callbacks
->undefined_symbol
) (info
,
3157 h
->root
.root
.string
,
3167 /* Relocations that may need to be propagated if this is a shared
3169 case (int)R_PPC_REL24
:
3170 case (int)R_PPC_REL32
:
3171 case (int)R_PPC_REL14
:
3172 /* If these relocations are not to a named symbol, they can be
3173 handled right here, no need to bother the dynamic linker. */
3175 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
3176 || SYMBOL_REFERENCES_LOCAL (info
, h
))
3180 /* Relocations that always need to be propagated if this is a shared
3182 case (int)R_PPC_NONE
:
3183 case (int)R_PPC_ADDR32
:
3184 case (int)R_PPC_ADDR24
:
3185 case (int)R_PPC_ADDR16
:
3186 case (int)R_PPC_ADDR16_LO
:
3187 case (int)R_PPC_ADDR16_HI
:
3188 case (int)R_PPC_ADDR16_HA
:
3189 case (int)R_PPC_ADDR14
:
3190 case (int)R_PPC_UADDR32
:
3191 case (int)R_PPC_UADDR16
:
3194 Elf_Internal_Rela outrel
;
3198 fprintf (stderr
, "ppc_elf_relocate_section need to create relocation for %s\n",
3199 (h
&& h
->root
.root
.string
) ? h
->root
.root
.string
: "<unknown>");
3202 /* When generating a shared object, these relocations
3203 are copied into the output file to be resolved at run
3210 name
= (bfd_elf_string_from_elf_section
3212 elf_elfheader (input_bfd
)->e_shstrndx
,
3213 elf_section_data (input_section
)->rel_hdr
.sh_name
));
3217 BFD_ASSERT (strncmp (name
, ".rela", 5) == 0
3218 && strcmp (bfd_get_section_name (input_bfd
,
3222 sreloc
= bfd_get_section_by_name (dynobj
, name
);
3223 BFD_ASSERT (sreloc
!= NULL
);
3228 if (elf_section_data (input_section
)->stab_info
== NULL
)
3229 outrel
.r_offset
= rel
->r_offset
;
3234 off
= (_bfd_stab_section_offset
3235 (output_bfd
, &elf_hash_table (info
)->stab_info
,
3237 &elf_section_data (input_section
)->stab_info
,
3239 if (off
== (bfd_vma
) -1)
3241 outrel
.r_offset
= off
;
3244 outrel
.r_offset
+= (input_section
->output_section
->vma
3245 + input_section
->output_offset
);
3248 memset (&outrel
, 0, sizeof outrel
);
3249 /* h->dynindx may be -1 if this symbol was marked to
3251 else if (! will_become_local
)
3253 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3254 outrel
.r_addend
= rel
->r_addend
;
3258 if (r_type
== R_PPC_ADDR32
)
3260 outrel
.r_info
= ELF32_R_INFO (0, R_PPC_RELATIVE
);
3261 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3268 sec
= local_sections
[r_symndx
];
3271 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
3273 == bfd_link_hash_defweak
));
3274 sec
= h
->root
.u
.def
.section
;
3276 if (sec
!= NULL
&& bfd_is_abs_section (sec
))
3278 else if (sec
== NULL
|| sec
->owner
== NULL
)
3280 bfd_set_error (bfd_error_bad_value
);
3287 osec
= sec
->output_section
;
3288 indx
= elf_section_data (osec
)->dynindx
;
3289 BFD_ASSERT(indx
> 0);
3293 printf("indx=%d section=%s flags=%08x name=%s\n",
3294 indx
, osec
->name
, osec
->flags
,
3295 h
->root
.root
.string
);
3300 outrel
.r_info
= ELF32_R_INFO (indx
, r_type
);
3301 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3305 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,
3306 (((Elf32_External_Rela
*)
3308 + sreloc
->reloc_count
));
3309 ++sreloc
->reloc_count
;
3311 /* This reloc will be computed at runtime, so there's no
3312 need to do anything now, unless this is a RELATIVE
3313 reloc in an unallocated section. */
3315 || (input_section
->flags
& SEC_ALLOC
) != 0
3316 || ELF32_R_TYPE (outrel
.r_info
) != R_PPC_RELATIVE
)
3320 /* Arithmetic adjust relocations that aren't going into a
3322 if (r_type
== R_PPC_ADDR16_HA
3323 /* It's just possible that this symbol is a weak symbol
3324 that's not actually defined anywhere. In that case,
3325 'sec' would be NULL, and we should leave the symbol
3326 alone (it will be set to zero elsewhere in the link). */
3329 addend
+= ((relocation
+ addend
) & 0x8000) << 1;
3333 /* branch taken prediction relocations */
3334 case (int)R_PPC_ADDR14_BRTAKEN
:
3335 case (int)R_PPC_REL14_BRTAKEN
:
3336 insn
= bfd_get_32 (output_bfd
, contents
+ offset
);
3337 if ((relocation
- offset
) & 0x8000)
3338 insn
&= ~BRANCH_PREDICT_BIT
;
3340 insn
|= BRANCH_PREDICT_BIT
;
3341 bfd_put_32 (output_bfd
, insn
, contents
+ offset
);
3344 /* branch not taken predicition relocations */
3345 case (int)R_PPC_ADDR14_BRNTAKEN
:
3346 case (int)R_PPC_REL14_BRNTAKEN
:
3347 insn
= bfd_get_32 (output_bfd
, contents
+ offset
);
3348 if ((relocation
- offset
) & 0x8000)
3349 insn
|= BRANCH_PREDICT_BIT
;
3351 insn
&= ~BRANCH_PREDICT_BIT
;
3352 bfd_put_32 (output_bfd
, insn
, contents
+ offset
);
3355 /* GOT16 relocations */
3356 case (int)R_PPC_GOT16
:
3357 case (int)R_PPC_GOT16_LO
:
3358 case (int)R_PPC_GOT16_HI
:
3359 case (int)R_PPC_GOT16_HA
:
3360 /* Relocation is to the entry for this symbol in the global
3362 BFD_ASSERT (sgot
!= NULL
);
3368 off
= h
->got
.offset
;
3369 BFD_ASSERT (off
!= (bfd_vma
) -1);
3371 if (! elf_hash_table (info
)->dynamic_sections_created
3373 && SYMBOL_REFERENCES_LOCAL (info
, h
)))
3375 /* This is actually a static link, or it is a
3376 -Bsymbolic link and the symbol is defined
3377 locally. We must initialize this entry in the
3378 global offset table. Since the offset must
3379 always be a multiple of 4, we use the least
3380 significant bit to record whether we have
3381 initialized it already.
3383 When doing a dynamic link, we create a .rela.got
3384 relocation entry to initialize the value. This
3385 is done in the finish_dynamic_symbol routine. */
3390 bfd_put_32 (output_bfd
, relocation
,
3391 sgot
->contents
+ off
);
3396 relocation
= sgot
->output_offset
+ off
- 4;
3402 BFD_ASSERT (local_got_offsets
!= NULL
3403 && local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
3405 off
= local_got_offsets
[r_symndx
];
3407 /* The offset must always be a multiple of 4. We use
3408 the least significant bit to record whether we have
3409 already processed this entry. */
3414 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
3419 Elf_Internal_Rela outrel
;
3421 /* We need to generate a R_PPC_RELATIVE reloc
3422 for the dynamic linker. */
3423 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
3424 BFD_ASSERT (srelgot
!= NULL
);
3426 outrel
.r_offset
= (sgot
->output_section
->vma
3427 + sgot
->output_offset
3429 outrel
.r_info
= ELF32_R_INFO (0, R_PPC_RELATIVE
);
3430 outrel
.r_addend
= relocation
;
3431 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,
3432 (((Elf32_External_Rela
*)
3434 + srelgot
->reloc_count
));
3435 ++srelgot
->reloc_count
;
3438 local_got_offsets
[r_symndx
] |= 1;
3441 relocation
= sgot
->output_offset
+ off
- 4;
3445 /* Indirect .sdata relocation */
3446 case (int)R_PPC_EMB_SDAI16
:
3447 BFD_ASSERT (sdata
!= NULL
);
3448 relocation
= bfd_elf32_finish_pointer_linker_section (output_bfd
, input_bfd
, info
,
3449 sdata
, h
, relocation
, rel
,
3453 /* Indirect .sdata2 relocation */
3454 case (int)R_PPC_EMB_SDA2I16
:
3455 BFD_ASSERT (sdata2
!= NULL
);
3456 relocation
= bfd_elf32_finish_pointer_linker_section (output_bfd
, input_bfd
, info
,
3457 sdata2
, h
, relocation
, rel
,
3461 /* Handle the TOC16 reloc. We want to use the offset within the .got
3462 section, not the actual VMA. This is appropriate when generating
3463 an embedded ELF object, for which the .got section acts like the
3464 AIX .toc section. */
3465 case (int)R_PPC_TOC16
: /* phony GOT16 relocations */
3466 BFD_ASSERT (sec
!= (asection
*)0);
3467 BFD_ASSERT (bfd_is_und_section (sec
)
3468 || strcmp (bfd_get_section_name (abfd
, sec
), ".got") == 0
3469 || strcmp (bfd_get_section_name (abfd
, sec
), ".cgot") == 0)
3471 addend
-= sec
->output_section
->vma
+ sec
->output_offset
+ 0x8000;
3474 case (int)R_PPC_PLTREL24
:
3475 /* Relocation is to the entry for this symbol in the
3476 procedure linkage table. */
3477 BFD_ASSERT (h
!= NULL
);
3479 if (h
->plt
.offset
== (bfd_vma
) -1
3482 /* We didn't make a PLT entry for this symbol. This
3483 happens when statically linking PIC code, or when
3484 using -Bsymbolic. */
3488 relocation
= (splt
->output_section
->vma
3489 + splt
->output_offset
3493 /* relocate against _SDA_BASE_ */
3494 case (int)R_PPC_SDAREL16
:
3498 BFD_ASSERT (sec
!= (asection
*)0);
3499 name
= bfd_get_section_name (abfd
, sec
->output_section
);
3500 if (strcmp (name
, ".sdata") != 0
3501 && strcmp (name
, ".sbss") != 0)
3503 (*_bfd_error_handler
) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3504 bfd_get_filename (input_bfd
),
3506 ppc_elf_howto_table
[ (int)r_type
]->name
,
3509 addend
-= (sdata
->sym_hash
->root
.u
.def
.value
3510 + sdata
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3511 + sdata
->sym_hash
->root
.u
.def
.section
->output_offset
);
3516 /* relocate against _SDA2_BASE_ */
3517 case (int)R_PPC_EMB_SDA2REL
:
3521 BFD_ASSERT (sec
!= (asection
*)0);
3522 name
= bfd_get_section_name (abfd
, sec
->output_section
);
3523 if (strcmp (name
, ".sdata2") != 0 && strcmp (name
, ".sbss2") != 0)
3525 (*_bfd_error_handler
) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3526 bfd_get_filename (input_bfd
),
3528 ppc_elf_howto_table
[ (int)r_type
]->name
,
3531 bfd_set_error (bfd_error_bad_value
);
3535 addend
-= (sdata2
->sym_hash
->root
.u
.def
.value
3536 + sdata2
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3537 + sdata2
->sym_hash
->root
.u
.def
.section
->output_offset
);
3542 /* relocate against either _SDA_BASE_, _SDA2_BASE_, or 0 */
3543 case (int)R_PPC_EMB_SDA21
:
3544 case (int)R_PPC_EMB_RELSDA
:
3549 BFD_ASSERT (sec
!= (asection
*)0);
3550 name
= bfd_get_section_name (abfd
, sec
->output_section
);
3551 if (strcmp (name
, ".sdata") == 0 || strcmp (name
, ".sbss") == 0)
3554 addend
-= (sdata
->sym_hash
->root
.u
.def
.value
3555 + sdata
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3556 + sdata
->sym_hash
->root
.u
.def
.section
->output_offset
);
3559 else if (strcmp (name
, ".sdata2") == 0 || strcmp (name
, ".sbss2") == 0)
3562 addend
-= (sdata2
->sym_hash
->root
.u
.def
.value
3563 + sdata2
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3564 + sdata2
->sym_hash
->root
.u
.def
.section
->output_offset
);
3567 else if (strcmp (name
, ".PPC.EMB.sdata0") == 0 || strcmp (name
, ".PPC.EMB.sbss0") == 0)
3574 (*_bfd_error_handler
) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3575 bfd_get_filename (input_bfd
),
3577 ppc_elf_howto_table
[ (int)r_type
]->name
,
3580 bfd_set_error (bfd_error_bad_value
);
3585 if (r_type
== R_PPC_EMB_SDA21
)
3586 { /* fill in register field */
3587 insn
= bfd_get_32 (output_bfd
, contents
+ offset
);
3588 insn
= (insn
& ~RA_REGISTER_MASK
) | (reg
<< RA_REGISTER_SHIFT
);
3589 bfd_put_32 (output_bfd
, insn
, contents
+ offset
);
3594 /* Relocate against the beginning of the section */
3595 case (int)R_PPC_SECTOFF
:
3596 case (int)R_PPC_SECTOFF_LO
:
3597 case (int)R_PPC_SECTOFF_HI
:
3598 BFD_ASSERT (sec
!= (asection
*)0);
3599 addend
-= sec
->output_section
->vma
;
3602 case (int)R_PPC_SECTOFF_HA
:
3603 BFD_ASSERT (sec
!= (asection
*)0);
3604 addend
-= sec
->output_section
->vma
;
3605 addend
+= ((relocation
+ addend
) & 0x8000) << 1;
3608 /* Negative relocations */
3609 case (int)R_PPC_EMB_NADDR32
:
3610 case (int)R_PPC_EMB_NADDR16
:
3611 case (int)R_PPC_EMB_NADDR16_LO
:
3612 case (int)R_PPC_EMB_NADDR16_HI
:
3613 addend
-= 2*relocation
;
3616 case (int)R_PPC_EMB_NADDR16_HA
:
3617 addend
-= 2*relocation
;
3618 addend
+= ((relocation
+ addend
) & 0x8000) << 1;
3621 /* NOP relocation that prevents garbage collecting linkers from omitting a
3623 case (int)R_PPC_EMB_MRKREF
:
3626 case (int)R_PPC_COPY
:
3627 case (int)R_PPC_GLOB_DAT
:
3628 case (int)R_PPC_JMP_SLOT
:
3629 case (int)R_PPC_RELATIVE
:
3630 case (int)R_PPC_PLT32
:
3631 case (int)R_PPC_PLTREL32
:
3632 case (int)R_PPC_PLT16_LO
:
3633 case (int)R_PPC_PLT16_HI
:
3634 case (int)R_PPC_PLT16_HA
:
3635 case (int)R_PPC_EMB_RELSEC16
:
3636 case (int)R_PPC_EMB_RELST_LO
:
3637 case (int)R_PPC_EMB_RELST_HI
:
3638 case (int)R_PPC_EMB_RELST_HA
:
3639 case (int)R_PPC_EMB_BIT_FLD
:
3640 (*_bfd_error_handler
) (_("%s: Relocation %s is not yet supported for symbol %s."),
3641 bfd_get_filename (input_bfd
),
3642 ppc_elf_howto_table
[ (int)r_type
]->name
,
3645 bfd_set_error (bfd_error_invalid_operation
);
3649 case (int)R_PPC_GNU_VTINHERIT
:
3650 case (int)R_PPC_GNU_VTENTRY
:
3651 /* These are no-ops in the end. */
3657 fprintf (stderr
, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n",
3666 r
= _bfd_final_link_relocate (howto
,
3674 if (r
== bfd_reloc_ok
)
3676 else if (r
== bfd_reloc_overflow
)
3682 if (h
->root
.type
== bfd_link_hash_undefweak
3683 && howto
->pc_relative
)
3685 /* Assume this is a call protected by other code that
3686 detect the symbol is undefined. If this is the case,
3687 we can safely ignore the overflow. If not, the
3688 program is hosed anyway, and a little warning isn't
3694 name
= h
->root
.root
.string
;
3698 name
= bfd_elf_string_from_elf_section (input_bfd
,
3699 symtab_hdr
->sh_link
,
3704 name
= bfd_section_name (input_bfd
, sec
);
3707 if (! (*info
->callbacks
->reloc_overflow
)(info
,
3721 fprintf (stderr
, "\n");
3728 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
3729 #define TARGET_LITTLE_NAME "elf32-powerpcle"
3730 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
3731 #define TARGET_BIG_NAME "elf32-powerpc"
3732 #define ELF_ARCH bfd_arch_powerpc
3733 #define ELF_MACHINE_CODE EM_PPC
3734 #define ELF_MAXPAGESIZE 0x10000
3735 #define elf_info_to_howto ppc_elf_info_to_howto
3737 #ifdef EM_CYGNUS_POWERPC
3738 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
3742 #define ELF_MACHINE_ALT2 EM_PPC_OLD
3745 #define elf_backend_plt_not_loaded 1
3746 #define elf_backend_got_symbol_offset 4
3747 #define elf_backend_can_gc_sections 1
3748 #define elf_backend_got_header_size 12
3749 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
3751 #define bfd_elf32_bfd_copy_private_bfd_data ppc_elf_copy_private_bfd_data
3752 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
3753 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
3754 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
3755 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
3756 #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
3758 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
3759 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
3760 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
3761 #define elf_backend_relocate_section ppc_elf_relocate_section
3762 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
3763 #define elf_backend_check_relocs ppc_elf_check_relocs
3764 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
3765 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
3766 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
3767 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
3768 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
3769 #define elf_backend_fake_sections ppc_elf_fake_sections
3770 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
3771 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
3773 #include "elf32-target.h"