1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 /* This file is based on a preliminary PowerPC ELF ABI. The
23 information may not match the final PowerPC ELF ABI. It includes
24 suggestions from the in-progress Embedded PowerPC ABI, and that
25 information may also not match. */
34 #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 int ppc_elf_sort_rela
PARAMS ((const PTR
, const PTR
));
42 static boolean ppc_elf_relax_section
43 PARAMS ((bfd
*, asection
*, struct bfd_link_info
*, boolean
*));
44 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
45 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
46 static boolean ppc_elf_set_private_flags
PARAMS ((bfd
*, flagword
));
47 static boolean ppc_elf_copy_private_bfd_data
PARAMS ((bfd
*, bfd
*));
48 static boolean ppc_elf_merge_private_bfd_data
PARAMS ((bfd
*, bfd
*));
50 static int ppc_elf_additional_program_headers
PARAMS ((bfd
*));
51 static boolean ppc_elf_modify_segment_map
PARAMS ((bfd
*));
53 static boolean ppc_elf_create_dynamic_sections
54 PARAMS ((bfd
*, struct bfd_link_info
*));
56 static boolean ppc_elf_section_from_shdr
PARAMS ((bfd
*,
57 Elf32_Internal_Shdr
*,
59 static boolean ppc_elf_fake_sections
60 PARAMS ((bfd
*, Elf32_Internal_Shdr
*, asection
*));
62 static elf_linker_section_t
*ppc_elf_create_linker_section
64 struct bfd_link_info
*info
,
65 enum elf_linker_section_enum
));
67 static boolean ppc_elf_check_relocs
PARAMS ((bfd
*,
68 struct bfd_link_info
*,
70 const Elf_Internal_Rela
*));
72 static asection
* ppc_elf_gc_mark_hook
PARAMS ((bfd
*abfd
,
73 struct bfd_link_info
*info
,
74 Elf_Internal_Rela
*rel
,
75 struct elf_link_hash_entry
*h
,
76 Elf_Internal_Sym
*sym
));
78 static boolean ppc_elf_gc_sweep_hook
PARAMS ((bfd
*abfd
,
79 struct bfd_link_info
*info
,
81 const Elf_Internal_Rela
*relocs
));
83 static boolean ppc_elf_adjust_dynamic_symbol
PARAMS ((struct bfd_link_info
*,
84 struct elf_link_hash_entry
*));
86 static boolean ppc_elf_size_dynamic_sections
PARAMS ((bfd
*, struct bfd_link_info
*));
88 static boolean ppc_elf_relocate_section
PARAMS ((bfd
*,
89 struct bfd_link_info
*info
,
93 Elf_Internal_Rela
*relocs
,
94 Elf_Internal_Sym
*local_syms
,
97 static boolean ppc_elf_add_symbol_hook
PARAMS ((bfd
*,
98 struct bfd_link_info
*,
99 const Elf_Internal_Sym
*,
105 static boolean ppc_elf_finish_dynamic_symbol
PARAMS ((bfd
*,
106 struct bfd_link_info
*,
107 struct elf_link_hash_entry
*,
108 Elf_Internal_Sym
*));
110 static boolean ppc_elf_finish_dynamic_sections
PARAMS ((bfd
*, struct bfd_link_info
*));
112 #define BRANCH_PREDICT_BIT 0x200000 /* branch prediction bit for branch taken relocs */
113 #define RA_REGISTER_MASK 0x001f0000 /* mask to set RA in memory instructions */
114 #define RA_REGISTER_SHIFT 16 /* value to shift register by to insert RA */
116 /* The name of the dynamic interpreter. This is put in the .interp
119 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
121 /* The size in bytes of an entry in the procedure linkage table. */
122 #define PLT_ENTRY_SIZE 12
123 /* The initial size of the plt reserved for the dynamic linker. */
124 #define PLT_INITIAL_ENTRY_SIZE 72
125 /* The size of the gap between entries in the PLT. */
126 #define PLT_SLOT_SIZE 8
127 /* The number of single-slot PLT entries (the rest use two slots). */
128 #define PLT_NUM_SINGLE_ENTRIES 8192
130 /* Will references to this symbol always reference the symbol
132 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
135 || H->dynindx == -1 \
136 || ELF_ST_VISIBILITY (H->other) == STV_INTERNAL \
137 || ELF_ST_VISIBILITY (H->other) == STV_HIDDEN) \
138 && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
140 /* Will _calls_ to this symbol always call the version in this object? */
141 #define SYMBOL_CALLS_LOCAL(INFO, H) \
144 || H->dynindx == -1 \
145 || ELF_ST_VISIBILITY (H->other) != STV_DEFAULT) \
146 && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
148 static reloc_howto_type
*ppc_elf_howto_table
[(int) R_PPC_max
];
150 static reloc_howto_type ppc_elf_howto_raw
[] = {
151 /* This reloc does nothing. */
152 HOWTO (R_PPC_NONE
, /* type */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
156 false, /* pc_relative */
158 complain_overflow_bitfield
, /* complain_on_overflow */
159 bfd_elf_generic_reloc
, /* special_function */
160 "R_PPC_NONE", /* name */
161 false, /* partial_inplace */
164 false), /* pcrel_offset */
166 /* A standard 32 bit relocation. */
167 HOWTO (R_PPC_ADDR32
, /* type */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
171 false, /* pc_relative */
173 complain_overflow_bitfield
, /* complain_on_overflow */
174 bfd_elf_generic_reloc
, /* special_function */
175 "R_PPC_ADDR32", /* name */
176 false, /* partial_inplace */
178 0xffffffff, /* dst_mask */
179 false), /* pcrel_offset */
181 /* An absolute 26 bit branch; the lower two bits must be zero.
182 FIXME: we don't check that, we just clear them. */
183 HOWTO (R_PPC_ADDR24
, /* type */
185 2, /* size (0 = byte, 1 = short, 2 = long) */
187 false, /* pc_relative */
189 complain_overflow_bitfield
, /* complain_on_overflow */
190 bfd_elf_generic_reloc
, /* special_function */
191 "R_PPC_ADDR24", /* name */
192 false, /* partial_inplace */
194 0x3fffffc, /* dst_mask */
195 false), /* pcrel_offset */
197 /* A standard 16 bit relocation. */
198 HOWTO (R_PPC_ADDR16
, /* type */
200 1, /* size (0 = byte, 1 = short, 2 = long) */
202 false, /* pc_relative */
204 complain_overflow_bitfield
, /* complain_on_overflow */
205 bfd_elf_generic_reloc
, /* special_function */
206 "R_PPC_ADDR16", /* name */
207 false, /* partial_inplace */
209 0xffff, /* dst_mask */
210 false), /* pcrel_offset */
212 /* A 16 bit relocation without overflow. */
213 HOWTO (R_PPC_ADDR16_LO
, /* type */
215 1, /* size (0 = byte, 1 = short, 2 = long) */
217 false, /* pc_relative */
219 complain_overflow_dont
,/* complain_on_overflow */
220 bfd_elf_generic_reloc
, /* special_function */
221 "R_PPC_ADDR16_LO", /* name */
222 false, /* partial_inplace */
224 0xffff, /* dst_mask */
225 false), /* pcrel_offset */
227 /* The high order 16 bits of an address. */
228 HOWTO (R_PPC_ADDR16_HI
, /* type */
230 1, /* size (0 = byte, 1 = short, 2 = long) */
232 false, /* pc_relative */
234 complain_overflow_dont
, /* complain_on_overflow */
235 bfd_elf_generic_reloc
, /* special_function */
236 "R_PPC_ADDR16_HI", /* name */
237 false, /* partial_inplace */
239 0xffff, /* dst_mask */
240 false), /* pcrel_offset */
242 /* The high order 16 bits of an address, plus 1 if the contents of
243 the low 16 bits, treated as a signed number, is negative. */
244 HOWTO (R_PPC_ADDR16_HA
, /* type */
246 1, /* size (0 = byte, 1 = short, 2 = long) */
248 false, /* pc_relative */
250 complain_overflow_dont
, /* complain_on_overflow */
251 ppc_elf_addr16_ha_reloc
, /* special_function */
252 "R_PPC_ADDR16_HA", /* name */
253 false, /* partial_inplace */
255 0xffff, /* dst_mask */
256 false), /* pcrel_offset */
258 /* An absolute 16 bit branch; the lower two bits must be zero.
259 FIXME: we don't check that, we just clear them. */
260 HOWTO (R_PPC_ADDR14
, /* type */
262 2, /* size (0 = byte, 1 = short, 2 = long) */
264 false, /* pc_relative */
266 complain_overflow_bitfield
, /* complain_on_overflow */
267 bfd_elf_generic_reloc
, /* special_function */
268 "R_PPC_ADDR14", /* name */
269 false, /* partial_inplace */
271 0xfffc, /* dst_mask */
272 false), /* pcrel_offset */
274 /* An absolute 16 bit branch, for which bit 10 should be set to
275 indicate that the branch is expected to be taken. The lower two
276 bits must be zero. */
277 HOWTO (R_PPC_ADDR14_BRTAKEN
, /* type */
279 2, /* size (0 = byte, 1 = short, 2 = long) */
281 false, /* pc_relative */
283 complain_overflow_bitfield
, /* complain_on_overflow */
284 bfd_elf_generic_reloc
, /* special_function */
285 "R_PPC_ADDR14_BRTAKEN",/* name */
286 false, /* partial_inplace */
288 0xfffc, /* dst_mask */
289 false), /* pcrel_offset */
291 /* An absolute 16 bit branch, for which bit 10 should be set to
292 indicate that the branch is not expected to be taken. The lower
293 two bits must be zero. */
294 HOWTO (R_PPC_ADDR14_BRNTAKEN
, /* type */
296 2, /* size (0 = byte, 1 = short, 2 = long) */
298 false, /* pc_relative */
300 complain_overflow_bitfield
, /* complain_on_overflow */
301 bfd_elf_generic_reloc
, /* special_function */
302 "R_PPC_ADDR14_BRNTAKEN",/* name */
303 false, /* partial_inplace */
305 0xfffc, /* dst_mask */
306 false), /* pcrel_offset */
308 /* A relative 26 bit branch; the lower two bits must be zero. */
309 HOWTO (R_PPC_REL24
, /* type */
311 2, /* size (0 = byte, 1 = short, 2 = long) */
313 true, /* pc_relative */
315 complain_overflow_signed
, /* complain_on_overflow */
316 bfd_elf_generic_reloc
, /* special_function */
317 "R_PPC_REL24", /* name */
318 false, /* partial_inplace */
320 0x3fffffc, /* dst_mask */
321 true), /* pcrel_offset */
323 /* A relative 16 bit branch; the lower two bits must be zero. */
324 HOWTO (R_PPC_REL14
, /* type */
326 2, /* size (0 = byte, 1 = short, 2 = long) */
328 true, /* pc_relative */
330 complain_overflow_signed
, /* complain_on_overflow */
331 bfd_elf_generic_reloc
, /* special_function */
332 "R_PPC_REL14", /* name */
333 false, /* partial_inplace */
335 0xfffc, /* dst_mask */
336 true), /* pcrel_offset */
338 /* A relative 16 bit branch. Bit 10 should be set to indicate that
339 the branch is expected to be taken. The lower two bits must be
341 HOWTO (R_PPC_REL14_BRTAKEN
, /* type */
343 2, /* size (0 = byte, 1 = short, 2 = long) */
345 true, /* pc_relative */
347 complain_overflow_signed
, /* complain_on_overflow */
348 bfd_elf_generic_reloc
, /* special_function */
349 "R_PPC_REL14_BRTAKEN", /* name */
350 false, /* partial_inplace */
352 0xfffc, /* dst_mask */
353 true), /* pcrel_offset */
355 /* A relative 16 bit branch. Bit 10 should be set to indicate that
356 the branch is not expected to be taken. The lower two bits must
358 HOWTO (R_PPC_REL14_BRNTAKEN
, /* type */
360 2, /* size (0 = byte, 1 = short, 2 = long) */
362 true, /* pc_relative */
364 complain_overflow_signed
, /* complain_on_overflow */
365 bfd_elf_generic_reloc
, /* special_function */
366 "R_PPC_REL14_BRNTAKEN",/* name */
367 false, /* partial_inplace */
369 0xfffc, /* dst_mask */
370 true), /* pcrel_offset */
372 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
374 HOWTO (R_PPC_GOT16
, /* type */
376 1, /* size (0 = byte, 1 = short, 2 = long) */
378 false, /* pc_relative */
380 complain_overflow_signed
, /* complain_on_overflow */
381 bfd_elf_generic_reloc
, /* special_function */
382 "R_PPC_GOT16", /* name */
383 false, /* partial_inplace */
385 0xffff, /* dst_mask */
386 false), /* pcrel_offset */
388 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
390 HOWTO (R_PPC_GOT16_LO
, /* type */
392 1, /* size (0 = byte, 1 = short, 2 = long) */
394 false, /* pc_relative */
396 complain_overflow_dont
, /* complain_on_overflow */
397 bfd_elf_generic_reloc
, /* special_function */
398 "R_PPC_GOT16_LO", /* name */
399 false, /* partial_inplace */
401 0xffff, /* dst_mask */
402 false), /* pcrel_offset */
404 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
406 HOWTO (R_PPC_GOT16_HI
, /* type */
408 1, /* size (0 = byte, 1 = short, 2 = long) */
410 false, /* pc_relative */
412 complain_overflow_bitfield
, /* complain_on_overflow */
413 bfd_elf_generic_reloc
, /* special_function */
414 "R_PPC_GOT16_HI", /* name */
415 false, /* partial_inplace */
417 0xffff, /* dst_mask */
418 false), /* pcrel_offset */
420 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
422 HOWTO (R_PPC_GOT16_HA
, /* type */
424 1, /* size (0 = byte, 1 = short, 2 = long) */
426 false, /* pc_relative */
428 complain_overflow_bitfield
, /* complain_on_overflow */
429 ppc_elf_addr16_ha_reloc
, /* special_function */
430 "R_PPC_GOT16_HA", /* name */
431 false, /* partial_inplace */
433 0xffff, /* dst_mask */
434 false), /* pcrel_offset */
436 /* Like R_PPC_REL24, but referring to the procedure linkage table
437 entry for the symbol. */
438 HOWTO (R_PPC_PLTREL24
, /* type */
440 2, /* size (0 = byte, 1 = short, 2 = long) */
442 true, /* pc_relative */
444 complain_overflow_signed
, /* complain_on_overflow */
445 bfd_elf_generic_reloc
, /* special_function */
446 "R_PPC_PLTREL24", /* name */
447 false, /* partial_inplace */
449 0x3fffffc, /* dst_mask */
450 true), /* pcrel_offset */
452 /* This is used only by the dynamic linker. The symbol should exist
453 both in the object being run and in some shared library. The
454 dynamic linker copies the data addressed by the symbol from the
455 shared library into the object, because the object being
456 run has to have the data at some particular address. */
457 HOWTO (R_PPC_COPY
, /* type */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
461 false, /* pc_relative */
463 complain_overflow_bitfield
, /* complain_on_overflow */
464 bfd_elf_generic_reloc
, /* special_function */
465 "R_PPC_COPY", /* name */
466 false, /* partial_inplace */
469 false), /* pcrel_offset */
471 /* Like R_PPC_ADDR32, but used when setting global offset table
473 HOWTO (R_PPC_GLOB_DAT
, /* type */
475 2, /* size (0 = byte, 1 = short, 2 = long) */
477 false, /* pc_relative */
479 complain_overflow_bitfield
, /* complain_on_overflow */
480 bfd_elf_generic_reloc
, /* special_function */
481 "R_PPC_GLOB_DAT", /* name */
482 false, /* partial_inplace */
484 0xffffffff, /* dst_mask */
485 false), /* pcrel_offset */
487 /* Marks a procedure linkage table entry for a symbol. */
488 HOWTO (R_PPC_JMP_SLOT
, /* type */
490 2, /* size (0 = byte, 1 = short, 2 = long) */
492 false, /* pc_relative */
494 complain_overflow_bitfield
, /* complain_on_overflow */
495 bfd_elf_generic_reloc
, /* special_function */
496 "R_PPC_JMP_SLOT", /* name */
497 false, /* partial_inplace */
500 false), /* pcrel_offset */
502 /* Used only by the dynamic linker. When the object is run, this
503 longword is set to the load address of the object, plus the
505 HOWTO (R_PPC_RELATIVE
, /* type */
507 2, /* size (0 = byte, 1 = short, 2 = long) */
509 false, /* pc_relative */
511 complain_overflow_bitfield
, /* complain_on_overflow */
512 bfd_elf_generic_reloc
, /* special_function */
513 "R_PPC_RELATIVE", /* name */
514 false, /* partial_inplace */
516 0xffffffff, /* dst_mask */
517 false), /* pcrel_offset */
519 /* Like R_PPC_REL24, but uses the value of the symbol within the
520 object rather than the final value. Normally used for
521 _GLOBAL_OFFSET_TABLE_. */
522 HOWTO (R_PPC_LOCAL24PC
, /* type */
524 2, /* size (0 = byte, 1 = short, 2 = long) */
526 true, /* pc_relative */
528 complain_overflow_signed
, /* complain_on_overflow */
529 bfd_elf_generic_reloc
, /* special_function */
530 "R_PPC_LOCAL24PC", /* name */
531 false, /* partial_inplace */
533 0x3fffffc, /* dst_mask */
534 true), /* pcrel_offset */
536 /* Like R_PPC_ADDR32, but may be unaligned. */
537 HOWTO (R_PPC_UADDR32
, /* type */
539 2, /* size (0 = byte, 1 = short, 2 = long) */
541 false, /* pc_relative */
543 complain_overflow_bitfield
, /* complain_on_overflow */
544 bfd_elf_generic_reloc
, /* special_function */
545 "R_PPC_UADDR32", /* name */
546 false, /* partial_inplace */
548 0xffffffff, /* dst_mask */
549 false), /* pcrel_offset */
551 /* Like R_PPC_ADDR16, but may be unaligned. */
552 HOWTO (R_PPC_UADDR16
, /* type */
554 1, /* size (0 = byte, 1 = short, 2 = long) */
556 false, /* pc_relative */
558 complain_overflow_bitfield
, /* complain_on_overflow */
559 bfd_elf_generic_reloc
, /* special_function */
560 "R_PPC_UADDR16", /* name */
561 false, /* partial_inplace */
563 0xffff, /* dst_mask */
564 false), /* pcrel_offset */
566 /* 32-bit PC relative */
567 HOWTO (R_PPC_REL32
, /* type */
569 2, /* size (0 = byte, 1 = short, 2 = long) */
571 true, /* pc_relative */
573 complain_overflow_bitfield
, /* complain_on_overflow */
574 bfd_elf_generic_reloc
, /* special_function */
575 "R_PPC_REL32", /* name */
576 false, /* partial_inplace */
578 0xffffffff, /* dst_mask */
579 true), /* pcrel_offset */
581 /* 32-bit relocation to the symbol's procedure linkage table.
582 FIXME: not supported. */
583 HOWTO (R_PPC_PLT32
, /* type */
585 2, /* size (0 = byte, 1 = short, 2 = long) */
587 false, /* pc_relative */
589 complain_overflow_bitfield
, /* complain_on_overflow */
590 bfd_elf_generic_reloc
, /* special_function */
591 "R_PPC_PLT32", /* name */
592 false, /* partial_inplace */
595 false), /* pcrel_offset */
597 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
598 FIXME: not supported. */
599 HOWTO (R_PPC_PLTREL32
, /* type */
601 2, /* size (0 = byte, 1 = short, 2 = long) */
603 true, /* pc_relative */
605 complain_overflow_bitfield
, /* complain_on_overflow */
606 bfd_elf_generic_reloc
, /* special_function */
607 "R_PPC_PLTREL32", /* name */
608 false, /* partial_inplace */
611 true), /* pcrel_offset */
613 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
615 HOWTO (R_PPC_PLT16_LO
, /* type */
617 1, /* size (0 = byte, 1 = short, 2 = long) */
619 false, /* pc_relative */
621 complain_overflow_dont
, /* complain_on_overflow */
622 bfd_elf_generic_reloc
, /* special_function */
623 "R_PPC_PLT16_LO", /* name */
624 false, /* partial_inplace */
626 0xffff, /* dst_mask */
627 false), /* pcrel_offset */
629 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
631 HOWTO (R_PPC_PLT16_HI
, /* type */
633 1, /* size (0 = byte, 1 = short, 2 = long) */
635 false, /* pc_relative */
637 complain_overflow_bitfield
, /* complain_on_overflow */
638 bfd_elf_generic_reloc
, /* special_function */
639 "R_PPC_PLT16_HI", /* name */
640 false, /* partial_inplace */
642 0xffff, /* dst_mask */
643 false), /* pcrel_offset */
645 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
647 HOWTO (R_PPC_PLT16_HA
, /* type */
649 1, /* size (0 = byte, 1 = short, 2 = long) */
651 false, /* pc_relative */
653 complain_overflow_bitfield
, /* complain_on_overflow */
654 ppc_elf_addr16_ha_reloc
, /* special_function */
655 "R_PPC_PLT16_HA", /* name */
656 false, /* partial_inplace */
658 0xffff, /* dst_mask */
659 false), /* pcrel_offset */
661 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
663 HOWTO (R_PPC_SDAREL16
, /* type */
665 1, /* size (0 = byte, 1 = short, 2 = long) */
667 false, /* pc_relative */
669 complain_overflow_signed
, /* complain_on_overflow */
670 bfd_elf_generic_reloc
, /* special_function */
671 "R_PPC_SDAREL16", /* name */
672 false, /* partial_inplace */
674 0xffff, /* dst_mask */
675 false), /* pcrel_offset */
677 /* 32-bit section relative relocation. */
678 HOWTO (R_PPC_SECTOFF
, /* type */
680 2, /* size (0 = byte, 1 = short, 2 = long) */
682 true, /* pc_relative */
684 complain_overflow_bitfield
, /* complain_on_overflow */
685 bfd_elf_generic_reloc
, /* special_function */
686 "R_PPC_SECTOFF", /* name */
687 false, /* partial_inplace */
690 true), /* pcrel_offset */
692 /* 16-bit lower half section relative relocation. */
693 HOWTO (R_PPC_SECTOFF_LO
, /* type */
695 1, /* size (0 = byte, 1 = short, 2 = long) */
697 false, /* pc_relative */
699 complain_overflow_dont
, /* complain_on_overflow */
700 bfd_elf_generic_reloc
, /* special_function */
701 "R_PPC_SECTOFF_LO", /* name */
702 false, /* partial_inplace */
704 0xffff, /* dst_mask */
705 false), /* pcrel_offset */
707 /* 16-bit upper half section relative relocation. */
708 HOWTO (R_PPC_SECTOFF_HI
, /* type */
710 1, /* size (0 = byte, 1 = short, 2 = long) */
712 false, /* pc_relative */
714 complain_overflow_bitfield
, /* complain_on_overflow */
715 bfd_elf_generic_reloc
, /* special_function */
716 "R_PPC_SECTOFF_HI", /* name */
717 false, /* partial_inplace */
719 0xffff, /* dst_mask */
720 false), /* pcrel_offset */
722 /* 16-bit upper half adjusted section relative relocation. */
723 HOWTO (R_PPC_SECTOFF_HA
, /* type */
725 1, /* size (0 = byte, 1 = short, 2 = long) */
727 false, /* pc_relative */
729 complain_overflow_bitfield
, /* complain_on_overflow */
730 ppc_elf_addr16_ha_reloc
, /* special_function */
731 "R_PPC_SECTOFF_HA", /* name */
732 false, /* partial_inplace */
734 0xffff, /* dst_mask */
735 false), /* pcrel_offset */
737 /* The remaining relocs are from the Embedded ELF ABI, and are not
738 in the SVR4 ELF ABI. */
740 /* 32 bit value resulting from the addend minus the symbol */
741 HOWTO (R_PPC_EMB_NADDR32
, /* type */
743 2, /* size (0 = byte, 1 = short, 2 = long) */
745 false, /* pc_relative */
747 complain_overflow_bitfield
, /* complain_on_overflow */
748 bfd_elf_generic_reloc
, /* special_function */
749 "R_PPC_EMB_NADDR32", /* name */
750 false, /* partial_inplace */
752 0xffffffff, /* dst_mask */
753 false), /* pcrel_offset */
755 /* 16 bit value resulting from the addend minus the symbol */
756 HOWTO (R_PPC_EMB_NADDR16
, /* type */
758 1, /* size (0 = byte, 1 = short, 2 = long) */
760 false, /* pc_relative */
762 complain_overflow_bitfield
, /* complain_on_overflow */
763 bfd_elf_generic_reloc
, /* special_function */
764 "R_PPC_EMB_NADDR16", /* name */
765 false, /* partial_inplace */
767 0xffff, /* dst_mask */
768 false), /* pcrel_offset */
770 /* 16 bit value resulting from the addend minus the symbol */
771 HOWTO (R_PPC_EMB_NADDR16_LO
, /* type */
773 1, /* size (0 = byte, 1 = short, 2 = long) */
775 false, /* pc_relative */
777 complain_overflow_dont
,/* complain_on_overflow */
778 bfd_elf_generic_reloc
, /* special_function */
779 "R_PPC_EMB_ADDR16_LO", /* name */
780 false, /* partial_inplace */
782 0xffff, /* dst_mask */
783 false), /* pcrel_offset */
785 /* The high order 16 bits of the addend minus the symbol */
786 HOWTO (R_PPC_EMB_NADDR16_HI
, /* type */
788 1, /* size (0 = byte, 1 = short, 2 = long) */
790 false, /* pc_relative */
792 complain_overflow_dont
, /* complain_on_overflow */
793 bfd_elf_generic_reloc
, /* special_function */
794 "R_PPC_EMB_NADDR16_HI", /* name */
795 false, /* partial_inplace */
797 0xffff, /* dst_mask */
798 false), /* pcrel_offset */
800 /* The high order 16 bits of the result of the addend minus the address,
801 plus 1 if the contents of the low 16 bits, treated as a signed number,
803 HOWTO (R_PPC_EMB_NADDR16_HA
, /* type */
805 1, /* size (0 = byte, 1 = short, 2 = long) */
807 false, /* pc_relative */
809 complain_overflow_dont
, /* complain_on_overflow */
810 ppc_elf_addr16_ha_reloc
, /* special_function */
811 "R_PPC_EMB_NADDR16_HA", /* name */
812 false, /* partial_inplace */
814 0xffff, /* dst_mask */
815 false), /* pcrel_offset */
817 /* 16 bit value resulting from allocating a 4 byte word to hold an
818 address in the .sdata section, and returning the offset from
819 _SDA_BASE_ for that relocation */
820 HOWTO (R_PPC_EMB_SDAI16
, /* type */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
824 false, /* pc_relative */
826 complain_overflow_bitfield
, /* complain_on_overflow */
827 bfd_elf_generic_reloc
, /* special_function */
828 "R_PPC_EMB_SDAI16", /* name */
829 false, /* partial_inplace */
831 0xffff, /* dst_mask */
832 false), /* pcrel_offset */
834 /* 16 bit value resulting from allocating a 4 byte word to hold an
835 address in the .sdata2 section, and returning the offset from
836 _SDA2_BASE_ for that relocation */
837 HOWTO (R_PPC_EMB_SDA2I16
, /* type */
839 1, /* size (0 = byte, 1 = short, 2 = long) */
841 false, /* pc_relative */
843 complain_overflow_bitfield
, /* complain_on_overflow */
844 bfd_elf_generic_reloc
, /* special_function */
845 "R_PPC_EMB_SDA2I16", /* name */
846 false, /* partial_inplace */
848 0xffff, /* dst_mask */
849 false), /* pcrel_offset */
851 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
853 HOWTO (R_PPC_EMB_SDA2REL
, /* type */
855 1, /* size (0 = byte, 1 = short, 2 = long) */
857 false, /* pc_relative */
859 complain_overflow_signed
, /* complain_on_overflow */
860 bfd_elf_generic_reloc
, /* special_function */
861 "R_PPC_EMB_SDA2REL", /* name */
862 false, /* partial_inplace */
864 0xffff, /* dst_mask */
865 false), /* pcrel_offset */
867 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
868 signed offset from the appropriate base, and filling in the register
869 field with the appropriate register (0, 2, or 13). */
870 HOWTO (R_PPC_EMB_SDA21
, /* type */
872 2, /* size (0 = byte, 1 = short, 2 = long) */
874 false, /* pc_relative */
876 complain_overflow_signed
, /* complain_on_overflow */
877 bfd_elf_generic_reloc
, /* special_function */
878 "R_PPC_EMB_SDA21", /* name */
879 false, /* partial_inplace */
881 0xffff, /* dst_mask */
882 false), /* pcrel_offset */
884 /* Relocation not handled: R_PPC_EMB_MRKREF */
885 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
886 /* Relocation not handled: R_PPC_EMB_RELST_LO */
887 /* Relocation not handled: R_PPC_EMB_RELST_HI */
888 /* Relocation not handled: R_PPC_EMB_RELST_HA */
889 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
891 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
892 in the 16 bit signed offset from the appropriate base, and filling in the
893 register field with the appropriate register (0, 2, or 13). */
894 HOWTO (R_PPC_EMB_RELSDA
, /* type */
896 1, /* size (0 = byte, 1 = short, 2 = long) */
898 true, /* pc_relative */
900 complain_overflow_signed
, /* complain_on_overflow */
901 bfd_elf_generic_reloc
, /* special_function */
902 "R_PPC_EMB_RELSDA", /* name */
903 false, /* partial_inplace */
905 0xffff, /* dst_mask */
906 false), /* pcrel_offset */
908 /* GNU extension to record C++ vtable hierarchy */
909 HOWTO (R_PPC_GNU_VTINHERIT
, /* type */
911 0, /* size (0 = byte, 1 = short, 2 = long) */
913 false, /* pc_relative */
915 complain_overflow_dont
, /* complain_on_overflow */
916 NULL
, /* special_function */
917 "R_PPC_GNU_VTINHERIT", /* name */
918 false, /* partial_inplace */
921 false), /* pcrel_offset */
923 /* GNU extension to record C++ vtable member usage */
924 HOWTO (R_PPC_GNU_VTENTRY
, /* type */
926 0, /* size (0 = byte, 1 = short, 2 = long) */
928 false, /* pc_relative */
930 complain_overflow_dont
, /* complain_on_overflow */
931 NULL
, /* special_function */
932 "R_PPC_GNU_VTENTRY", /* name */
933 false, /* partial_inplace */
936 false), /* pcrel_offset */
938 /* Phony reloc to handle AIX style TOC entries */
939 HOWTO (R_PPC_TOC16
, /* type */
941 1, /* size (0 = byte, 1 = short, 2 = long) */
943 false, /* pc_relative */
945 complain_overflow_signed
, /* complain_on_overflow */
946 bfd_elf_generic_reloc
, /* special_function */
947 "R_PPC_TOC16", /* name */
948 false, /* partial_inplace */
950 0xffff, /* dst_mask */
951 false), /* pcrel_offset */
954 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
957 ppc_elf_howto_init ()
959 unsigned int i
, type
;
961 for (i
= 0; i
< sizeof (ppc_elf_howto_raw
) / sizeof (ppc_elf_howto_raw
[0]); i
++)
963 type
= ppc_elf_howto_raw
[i
].type
;
964 BFD_ASSERT (type
< sizeof (ppc_elf_howto_table
) / sizeof (ppc_elf_howto_table
[0]));
965 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
);
1246 static reloc_howto_type
*
1247 ppc_elf_reloc_type_lookup (abfd
, code
)
1248 bfd
*abfd ATTRIBUTE_UNUSED
;
1249 bfd_reloc_code_real_type code
;
1251 enum elf_ppc_reloc_type ppc_reloc
= R_PPC_NONE
;
1253 if (!ppc_elf_howto_table
[R_PPC_ADDR32
])
1254 /* Initialize howto table if needed. */
1255 ppc_elf_howto_init ();
1260 return (reloc_howto_type
*) NULL
;
1262 case BFD_RELOC_NONE
: ppc_reloc
= R_PPC_NONE
; break;
1263 case BFD_RELOC_32
: ppc_reloc
= R_PPC_ADDR32
; break;
1264 case BFD_RELOC_PPC_BA26
: ppc_reloc
= R_PPC_ADDR24
; break;
1265 case BFD_RELOC_16
: ppc_reloc
= R_PPC_ADDR16
; break;
1266 case BFD_RELOC_LO16
: ppc_reloc
= R_PPC_ADDR16_LO
; break;
1267 case BFD_RELOC_HI16
: ppc_reloc
= R_PPC_ADDR16_HI
; break;
1268 case BFD_RELOC_HI16_S
: ppc_reloc
= R_PPC_ADDR16_HA
; break;
1269 case BFD_RELOC_PPC_BA16
: ppc_reloc
= R_PPC_ADDR14
; break;
1270 case BFD_RELOC_PPC_BA16_BRTAKEN
: ppc_reloc
= R_PPC_ADDR14_BRTAKEN
; break;
1271 case BFD_RELOC_PPC_BA16_BRNTAKEN
: ppc_reloc
= R_PPC_ADDR14_BRNTAKEN
; break;
1272 case BFD_RELOC_PPC_B26
: ppc_reloc
= R_PPC_REL24
; break;
1273 case BFD_RELOC_PPC_B16
: ppc_reloc
= R_PPC_REL14
; break;
1274 case BFD_RELOC_PPC_B16_BRTAKEN
: ppc_reloc
= R_PPC_REL14_BRTAKEN
; break;
1275 case BFD_RELOC_PPC_B16_BRNTAKEN
: ppc_reloc
= R_PPC_REL14_BRNTAKEN
; break;
1276 case BFD_RELOC_16_GOTOFF
: ppc_reloc
= R_PPC_GOT16
; break;
1277 case BFD_RELOC_LO16_GOTOFF
: ppc_reloc
= R_PPC_GOT16_LO
; break;
1278 case BFD_RELOC_HI16_GOTOFF
: ppc_reloc
= R_PPC_GOT16_HI
; break;
1279 case BFD_RELOC_HI16_S_GOTOFF
: ppc_reloc
= R_PPC_GOT16_HA
; break;
1280 case BFD_RELOC_24_PLT_PCREL
: ppc_reloc
= R_PPC_PLTREL24
; break;
1281 case BFD_RELOC_PPC_COPY
: ppc_reloc
= R_PPC_COPY
; break;
1282 case BFD_RELOC_PPC_GLOB_DAT
: ppc_reloc
= R_PPC_GLOB_DAT
; break;
1283 case BFD_RELOC_PPC_LOCAL24PC
: ppc_reloc
= R_PPC_LOCAL24PC
; break;
1284 case BFD_RELOC_32_PCREL
: ppc_reloc
= R_PPC_REL32
; break;
1285 case BFD_RELOC_32_PLTOFF
: ppc_reloc
= R_PPC_PLT32
; break;
1286 case BFD_RELOC_32_PLT_PCREL
: ppc_reloc
= R_PPC_PLTREL32
; break;
1287 case BFD_RELOC_LO16_PLTOFF
: ppc_reloc
= R_PPC_PLT16_LO
; break;
1288 case BFD_RELOC_HI16_PLTOFF
: ppc_reloc
= R_PPC_PLT16_HI
; break;
1289 case BFD_RELOC_HI16_S_PLTOFF
: ppc_reloc
= R_PPC_PLT16_HA
; break;
1290 case BFD_RELOC_GPREL16
: ppc_reloc
= R_PPC_SDAREL16
; break;
1291 case BFD_RELOC_32_BASEREL
: ppc_reloc
= R_PPC_SECTOFF
; break;
1292 case BFD_RELOC_LO16_BASEREL
: ppc_reloc
= R_PPC_SECTOFF_LO
; break;
1293 case BFD_RELOC_HI16_BASEREL
: ppc_reloc
= R_PPC_SECTOFF_HI
; break;
1294 case BFD_RELOC_HI16_S_BASEREL
: ppc_reloc
= R_PPC_SECTOFF_HA
; break;
1295 case BFD_RELOC_CTOR
: ppc_reloc
= R_PPC_ADDR32
; break;
1296 case BFD_RELOC_PPC_TOC16
: ppc_reloc
= R_PPC_TOC16
; break;
1297 case BFD_RELOC_PPC_EMB_NADDR32
: ppc_reloc
= R_PPC_EMB_NADDR32
; break;
1298 case BFD_RELOC_PPC_EMB_NADDR16
: ppc_reloc
= R_PPC_EMB_NADDR16
; break;
1299 case BFD_RELOC_PPC_EMB_NADDR16_LO
: ppc_reloc
= R_PPC_EMB_NADDR16_LO
; break;
1300 case BFD_RELOC_PPC_EMB_NADDR16_HI
: ppc_reloc
= R_PPC_EMB_NADDR16_HI
; break;
1301 case BFD_RELOC_PPC_EMB_NADDR16_HA
: ppc_reloc
= R_PPC_EMB_NADDR16_HA
; break;
1302 case BFD_RELOC_PPC_EMB_SDAI16
: ppc_reloc
= R_PPC_EMB_SDAI16
; break;
1303 case BFD_RELOC_PPC_EMB_SDA2I16
: ppc_reloc
= R_PPC_EMB_SDA2I16
; break;
1304 case BFD_RELOC_PPC_EMB_SDA2REL
: ppc_reloc
= R_PPC_EMB_SDA2REL
; break;
1305 case BFD_RELOC_PPC_EMB_SDA21
: ppc_reloc
= R_PPC_EMB_SDA21
; break;
1306 case BFD_RELOC_PPC_EMB_MRKREF
: ppc_reloc
= R_PPC_EMB_MRKREF
; break;
1307 case BFD_RELOC_PPC_EMB_RELSEC16
: ppc_reloc
= R_PPC_EMB_RELSEC16
; break;
1308 case BFD_RELOC_PPC_EMB_RELST_LO
: ppc_reloc
= R_PPC_EMB_RELST_LO
; break;
1309 case BFD_RELOC_PPC_EMB_RELST_HI
: ppc_reloc
= R_PPC_EMB_RELST_HI
; break;
1310 case BFD_RELOC_PPC_EMB_RELST_HA
: ppc_reloc
= R_PPC_EMB_RELST_HA
; break;
1311 case BFD_RELOC_PPC_EMB_BIT_FLD
: ppc_reloc
= R_PPC_EMB_BIT_FLD
; break;
1312 case BFD_RELOC_PPC_EMB_RELSDA
: ppc_reloc
= R_PPC_EMB_RELSDA
; break;
1313 case BFD_RELOC_VTABLE_INHERIT
: ppc_reloc
= R_PPC_GNU_VTINHERIT
; break;
1314 case BFD_RELOC_VTABLE_ENTRY
: ppc_reloc
= R_PPC_GNU_VTENTRY
; break;
1317 return ppc_elf_howto_table
[(int) ppc_reloc
];
1320 /* Set the howto pointer for a PowerPC ELF reloc. */
1323 ppc_elf_info_to_howto (abfd
, cache_ptr
, dst
)
1324 bfd
*abfd ATTRIBUTE_UNUSED
;
1326 Elf32_Internal_Rela
*dst
;
1328 if (!ppc_elf_howto_table
[R_PPC_ADDR32
])
1329 /* 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
);
1495 /* Handle a PowerPC specific section when reading an object file. This
1496 is called when elfcode.h finds a section with an unknown type. */
1499 ppc_elf_section_from_shdr (abfd
, hdr
, name
)
1501 Elf32_Internal_Shdr
*hdr
;
1507 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1510 newsect
= hdr
->bfd_section
;
1511 flags
= bfd_get_section_flags (abfd
, newsect
);
1512 if (hdr
->sh_flags
& SHF_EXCLUDE
)
1513 flags
|= SEC_EXCLUDE
;
1515 if (hdr
->sh_type
== SHT_ORDERED
)
1516 flags
|= SEC_SORT_ENTRIES
;
1518 bfd_set_section_flags (abfd
, newsect
, flags
);
1522 /* Set up any other section flags and such that may be necessary. */
1525 ppc_elf_fake_sections (abfd
, shdr
, asect
)
1526 bfd
*abfd ATTRIBUTE_UNUSED
;
1527 Elf32_Internal_Shdr
*shdr
;
1530 if ((asect
->flags
& SEC_EXCLUDE
) != 0)
1531 shdr
->sh_flags
|= SHF_EXCLUDE
;
1533 if ((asect
->flags
& SEC_SORT_ENTRIES
) != 0)
1534 shdr
->sh_type
= SHT_ORDERED
;
1539 /* Create a special linker section */
1540 static elf_linker_section_t
*
1541 ppc_elf_create_linker_section (abfd
, info
, which
)
1543 struct bfd_link_info
*info
;
1544 enum elf_linker_section_enum which
;
1546 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
1547 elf_linker_section_t
*lsect
;
1549 /* Record the first bfd section that needs the special section */
1551 dynobj
= elf_hash_table (info
)->dynobj
= abfd
;
1553 /* If this is the first time, create the section */
1554 lsect
= elf_linker_section (dynobj
, which
);
1557 elf_linker_section_t defaults
;
1558 static elf_linker_section_t zero_section
;
1560 defaults
= zero_section
;
1561 defaults
.which
= which
;
1562 defaults
.hole_written_p
= false;
1563 defaults
.alignment
= 2;
1565 /* Both of these sections are (technically) created by the user
1566 putting data in them, so they shouldn't be marked
1569 The linker creates them so it has somewhere to attach their
1570 respective symbols. In fact, if they were empty it would
1571 be OK to leave the symbol set to 0 (or any random number), because
1572 the appropriate register should never be used. */
1573 defaults
.flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
1579 (*_bfd_error_handler
) (_("%s: Unknown special linker type %d"),
1580 bfd_get_filename (abfd
),
1583 bfd_set_error (bfd_error_bad_value
);
1584 return (elf_linker_section_t
*) 0;
1586 case LINKER_SECTION_SDATA
: /* .sdata/.sbss section */
1587 defaults
.name
= ".sdata";
1588 defaults
.rel_name
= ".rela.sdata";
1589 defaults
.bss_name
= ".sbss";
1590 defaults
.sym_name
= "_SDA_BASE_";
1591 defaults
.sym_offset
= 32768;
1594 case LINKER_SECTION_SDATA2
: /* .sdata2/.sbss2 section */
1595 defaults
.name
= ".sdata2";
1596 defaults
.rel_name
= ".rela.sdata2";
1597 defaults
.bss_name
= ".sbss2";
1598 defaults
.sym_name
= "_SDA2_BASE_";
1599 defaults
.sym_offset
= 32768;
1600 defaults
.flags
|= SEC_READONLY
;
1604 lsect
= _bfd_elf_create_linker_section (abfd
, info
, which
, &defaults
);
1610 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
1611 need to bump up the number of section headers. */
1614 ppc_elf_additional_program_headers (abfd
)
1622 s
= bfd_get_section_by_name (abfd
, ".interp");
1626 s
= bfd_get_section_by_name (abfd
, ".sbss2");
1627 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0 && s
->_raw_size
> 0)
1630 s
= bfd_get_section_by_name (abfd
, ".PPC.EMB.sbss0");
1631 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0 && s
->_raw_size
> 0)
1637 /* Modify the segment map if needed. */
1640 ppc_elf_modify_segment_map (abfd
)
1641 bfd
*abfd ATTRIBUTE_UNUSED
;
1646 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
1647 to output sections (just like _bfd_elf_create_dynamic_sections has
1648 to create .dynbss and .rela.bss). */
1651 ppc_elf_create_dynamic_sections (abfd
, info
)
1653 struct bfd_link_info
*info
;
1655 register asection
*s
;
1658 if (!_bfd_elf_create_dynamic_sections (abfd
, info
))
1661 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1662 | SEC_LINKER_CREATED
);
1664 s
= bfd_make_section (abfd
, ".dynsbss");
1666 || ! bfd_set_section_flags (abfd
, s
, SEC_ALLOC
))
1671 s
= bfd_make_section (abfd
, ".rela.sbss");
1673 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
1674 || ! bfd_set_section_alignment (abfd
, s
, 2))
1680 /* Adjust a symbol defined by a dynamic object and referenced by a
1681 regular object. The current definition is in some section of the
1682 dynamic object, but we're not including those sections. We have to
1683 change the definition to something the rest of the link can
1687 ppc_elf_adjust_dynamic_symbol (info
, h
)
1688 struct bfd_link_info
*info
;
1689 struct elf_link_hash_entry
*h
;
1691 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
1693 unsigned int power_of_two
;
1697 fprintf (stderr
, "ppc_elf_adjust_dynamic_symbol called for %s\n", h
->root
.root
.string
);
1700 /* Make sure we know what is going on here. */
1701 BFD_ASSERT (dynobj
!= NULL
1702 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
)
1703 || h
->weakdef
!= NULL
1704 || ((h
->elf_link_hash_flags
1705 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0
1706 && (h
->elf_link_hash_flags
1707 & ELF_LINK_HASH_REF_REGULAR
) != 0
1708 && (h
->elf_link_hash_flags
1709 & ELF_LINK_HASH_DEF_REGULAR
) == 0)));
1711 /* If this is a function, put it in the procedure linkage table. We
1712 will fill in the contents of the procedure linkage table later,
1713 when we know the address of the .got section. */
1714 if (h
->type
== STT_FUNC
1715 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0)
1717 if (! elf_hash_table (info
)->dynamic_sections_created
1718 || SYMBOL_CALLS_LOCAL (info
, h
)
1719 || (info
->shared
&& h
->plt
.refcount
<= 0))
1721 /* A PLT entry is not required/allowed when:
1723 1. We are not using ld.so; because then the PLT entry
1724 can't be set up, so we can't use one.
1726 2. We know for certain that a call to this symbol
1727 will go to this object.
1729 3. GC has rendered the entry unused.
1730 Note, however, that in an executable all references to the
1731 symbol go to the PLT, so we can't turn it off in that case.
1732 ??? The correct thing to do here is to reference count
1733 all uses of the symbol, not just those to the GOT or PLT. */
1734 h
->plt
.offset
= (bfd_vma
) -1;
1735 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1739 /* Make sure this symbol is output as a dynamic symbol. */
1740 if (h
->dynindx
== -1)
1742 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
1745 BFD_ASSERT (h
->dynindx
!= -1);
1747 s
= bfd_get_section_by_name (dynobj
, ".plt");
1748 BFD_ASSERT (s
!= NULL
);
1750 /* If this is the first .plt entry, make room for the special
1752 if (s
->_raw_size
== 0)
1753 s
->_raw_size
+= PLT_INITIAL_ENTRY_SIZE
;
1755 /* The PowerPC PLT is actually composed of two parts, the first part
1756 is 2 words (for a load and a jump), and then there is a remaining
1757 word available at the end. */
1758 plt_offset
= (PLT_INITIAL_ENTRY_SIZE
1760 * ((s
->_raw_size
- PLT_INITIAL_ENTRY_SIZE
)
1761 / PLT_ENTRY_SIZE
)));
1763 /* If this symbol is not defined in a regular file, and we are
1764 not generating a shared library, then set the symbol to this
1765 location in the .plt. This is required to make function
1766 pointers compare as equal between the normal executable and
1767 the shared library. */
1769 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
1771 h
->root
.u
.def
.section
= s
;
1772 h
->root
.u
.def
.value
= plt_offset
;
1775 h
->plt
.offset
= plt_offset
;
1777 /* Make room for this entry. After the 8192nd entry, room
1778 for two entries is allocated. */
1779 if ((s
->_raw_size
- PLT_INITIAL_ENTRY_SIZE
) / PLT_ENTRY_SIZE
1780 >= PLT_NUM_SINGLE_ENTRIES
)
1781 s
->_raw_size
+= 2 * PLT_ENTRY_SIZE
;
1783 s
->_raw_size
+= PLT_ENTRY_SIZE
;
1785 /* We also need to make an entry in the .rela.plt section. */
1786 s
= bfd_get_section_by_name (dynobj
, ".rela.plt");
1787 BFD_ASSERT (s
!= NULL
);
1788 s
->_raw_size
+= sizeof (Elf32_External_Rela
);
1793 /* If this is a weak symbol, and there is a real definition, the
1794 processor independent code will have arranged for us to see the
1795 real definition first, and we can just use the same value. */
1796 if (h
->weakdef
!= NULL
)
1798 BFD_ASSERT (h
->weakdef
->root
.type
== bfd_link_hash_defined
1799 || h
->weakdef
->root
.type
== bfd_link_hash_defweak
);
1800 h
->root
.u
.def
.section
= h
->weakdef
->root
.u
.def
.section
;
1801 h
->root
.u
.def
.value
= h
->weakdef
->root
.u
.def
.value
;
1805 /* This is a reference to a symbol defined by a dynamic object which
1806 is not a function. */
1808 /* If we are creating a shared library, we must presume that the
1809 only references to the symbol are via the global offset table.
1810 For such cases we need not do anything here; the relocations will
1811 be handled correctly by relocate_section. */
1815 /* We must allocate the symbol in our .dynbss section, which will
1816 become part of the .bss section of the executable. There will be
1817 an entry for this symbol in the .dynsym section. The dynamic
1818 object will contain position independent code, so all references
1819 from the dynamic object to this symbol will go through the global
1820 offset table. The dynamic linker will use the .dynsym entry to
1821 determine the address it must put in the global offset table, so
1822 both the dynamic object and the regular object will refer to the
1823 same memory location for the variable.
1825 Of course, if the symbol is sufficiently small, we must instead
1826 allocate it in .sbss. FIXME: It would be better to do this if and
1827 only if there were actually SDAREL relocs for that symbol. */
1829 if (h
->size
<= elf_gp_size (dynobj
))
1830 s
= bfd_get_section_by_name (dynobj
, ".dynsbss");
1832 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
1833 BFD_ASSERT (s
!= NULL
);
1835 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
1836 copy the initial value out of the dynamic object and into the
1837 runtime process image. We need to remember the offset into the
1838 .rela.bss section we are going to use. */
1839 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1843 if (h
->size
<= elf_gp_size (dynobj
))
1844 srel
= bfd_get_section_by_name (dynobj
, ".rela.sbss");
1846 srel
= bfd_get_section_by_name (dynobj
, ".rela.bss");
1847 BFD_ASSERT (srel
!= NULL
);
1848 srel
->_raw_size
+= sizeof (Elf32_External_Rela
);
1849 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_COPY
;
1852 /* We need to figure out the alignment required for this symbol. I
1853 have no idea how ELF linkers handle this. */
1854 power_of_two
= bfd_log2 (h
->size
);
1855 if (power_of_two
> 4)
1858 /* Apply the required alignment. */
1859 s
->_raw_size
= BFD_ALIGN (s
->_raw_size
,
1860 (bfd_size_type
) (1 << power_of_two
));
1861 if (power_of_two
> bfd_get_section_alignment (dynobj
, s
))
1863 if (! bfd_set_section_alignment (dynobj
, s
, power_of_two
))
1867 /* Define the symbol as being at this point in the section. */
1868 h
->root
.u
.def
.section
= s
;
1869 h
->root
.u
.def
.value
= s
->_raw_size
;
1871 /* Increment the section size to make room for the symbol. */
1872 s
->_raw_size
+= h
->size
;
1877 /* Set the sizes of the dynamic sections. */
1880 ppc_elf_size_dynamic_sections (output_bfd
, info
)
1882 struct bfd_link_info
*info
;
1891 fprintf (stderr
, "ppc_elf_size_dynamic_sections called\n");
1894 dynobj
= elf_hash_table (info
)->dynobj
;
1895 BFD_ASSERT (dynobj
!= NULL
);
1897 if (elf_hash_table (info
)->dynamic_sections_created
)
1899 /* Set the contents of the .interp section to the interpreter. */
1902 s
= bfd_get_section_by_name (dynobj
, ".interp");
1903 BFD_ASSERT (s
!= NULL
);
1904 s
->_raw_size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1905 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1910 /* We may have created entries in the .rela.got, .rela.sdata, and
1911 .rela.sdata2 sections. However, if we are not creating the
1912 dynamic sections, we will not actually use these entries. Reset
1913 the size of .rela.got, et al, which will cause it to get
1914 stripped from the output file below. */
1915 static char *rela_sections
[] = { ".rela.got", ".rela.sdata",
1916 ".rela.sdata2", ".rela.sbss",
1920 for (p
= rela_sections
; *p
!= (char *) 0; p
++)
1922 s
= bfd_get_section_by_name (dynobj
, *p
);
1928 /* The check_relocs and adjust_dynamic_symbol entry points have
1929 determined the sizes of the various dynamic sections. Allocate
1934 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1939 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1942 /* It's OK to base decisions on the section name, because none
1943 of the dynobj section names depend upon the input files. */
1944 name
= bfd_get_section_name (dynobj
, s
);
1948 if (strcmp (name
, ".plt") == 0)
1950 if (s
->_raw_size
== 0)
1952 /* Strip this section if we don't need it; see the
1958 /* Remember whether there is a PLT. */
1962 else if (strncmp (name
, ".rela", 5) == 0)
1964 if (s
->_raw_size
== 0)
1966 /* If we don't need this section, strip it from the
1967 output file. This is mostly to handle .rela.bss and
1968 .rela.plt. We must create both sections in
1969 create_dynamic_sections, because they must be created
1970 before the linker maps input sections to output
1971 sections. The linker does that before
1972 adjust_dynamic_symbol is called, and it is that
1973 function which decides whether anything needs to go
1974 into these sections. */
1980 const char *outname
;
1982 /* Remember whether there are any relocation sections. */
1985 /* If this relocation section applies to a read only
1986 section, then we probably need a DT_TEXTREL entry. */
1987 outname
= bfd_get_section_name (output_bfd
,
1989 target
= bfd_get_section_by_name (output_bfd
, outname
+ 5);
1991 && (target
->flags
& SEC_READONLY
) != 0
1992 && (target
->flags
& SEC_ALLOC
) != 0)
1995 /* We use the reloc_count field as a counter if we need
1996 to copy relocs into the output file. */
2000 else if (strcmp (name
, ".got") != 0
2001 && strcmp (name
, ".sdata") != 0
2002 && strcmp (name
, ".sdata2") != 0)
2004 /* It's not one of our sections, so don't allocate space. */
2010 _bfd_strip_section_from_output (info
, s
);
2014 /* Allocate memory for the section contents. */
2015 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->_raw_size
);
2016 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
2020 if (elf_hash_table (info
)->dynamic_sections_created
)
2022 /* Add some entries to the .dynamic section. We fill in the
2023 values later, in ppc_elf_finish_dynamic_sections, but we
2024 must add the entries now so that we get the correct size for
2025 the .dynamic section. The DT_DEBUG entry is filled in by the
2026 dynamic linker and used by the debugger. */
2029 if (! bfd_elf32_add_dynamic_entry (info
, DT_DEBUG
, 0))
2035 if (! bfd_elf32_add_dynamic_entry (info
, DT_PLTGOT
, 0)
2036 || ! bfd_elf32_add_dynamic_entry (info
, DT_PLTRELSZ
, 0)
2037 || ! bfd_elf32_add_dynamic_entry (info
, DT_PLTREL
, DT_RELA
)
2038 || ! bfd_elf32_add_dynamic_entry (info
, DT_JMPREL
, 0))
2044 if (! bfd_elf32_add_dynamic_entry (info
, DT_RELA
, 0)
2045 || ! bfd_elf32_add_dynamic_entry (info
, DT_RELASZ
, 0)
2046 || ! bfd_elf32_add_dynamic_entry (info
, DT_RELAENT
,
2047 sizeof (Elf32_External_Rela
)))
2053 if (! bfd_elf32_add_dynamic_entry (info
, DT_TEXTREL
, 0))
2055 info
->flags
|= DF_TEXTREL
;
2062 /* Look through the relocs for a section during the first phase, and
2063 allocate space in the global offset table or procedure linkage
2067 ppc_elf_check_relocs (abfd
, info
, sec
, relocs
)
2069 struct bfd_link_info
*info
;
2071 const Elf_Internal_Rela
*relocs
;
2074 Elf_Internal_Shdr
*symtab_hdr
;
2075 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
2076 const Elf_Internal_Rela
*rel
;
2077 const Elf_Internal_Rela
*rel_end
;
2078 bfd_signed_vma
*local_got_refcounts
;
2079 elf_linker_section_t
*sdata
;
2080 elf_linker_section_t
*sdata2
;
2082 asection
*sgot
= NULL
;
2083 asection
*srelgot
= NULL
;
2085 if (info
->relocateable
)
2089 fprintf (stderr
, "ppc_elf_check_relocs called for section %s in %s\n",
2090 bfd_get_section_name (abfd
, sec
),
2091 bfd_get_filename (abfd
));
2094 /* Create the linker generated sections all the time so that the
2095 special symbols are created. */
2097 if ((sdata
= elf_linker_section (abfd
, LINKER_SECTION_SDATA
)) == NULL
)
2099 sdata
= ppc_elf_create_linker_section (abfd
, info
, LINKER_SECTION_SDATA
);
2104 if ((sdata2
= elf_linker_section (abfd
, LINKER_SECTION_SDATA2
)) == NULL
)
2106 sdata2
= ppc_elf_create_linker_section (abfd
, info
, LINKER_SECTION_SDATA2
);
2111 dynobj
= elf_hash_table (info
)->dynobj
;
2112 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2113 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2115 sym_hashes
= elf_sym_hashes (abfd
);
2116 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof (Elf32_External_Sym
);
2117 if (!elf_bad_symtab (abfd
))
2118 sym_hashes_end
-= symtab_hdr
->sh_info
;
2122 rel_end
= relocs
+ sec
->reloc_count
;
2123 for (rel
= relocs
; rel
< rel_end
; rel
++)
2125 unsigned long r_symndx
;
2126 struct elf_link_hash_entry
*h
;
2128 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2129 if (r_symndx
< symtab_hdr
->sh_info
)
2132 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2134 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
2135 This shows up in particular in an R_PPC_ADDR32 in the eabi
2137 if (h
&& strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
2142 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
2143 if (! _bfd_elf_create_got_section (dynobj
, info
))
2145 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2146 BFD_ASSERT (sgot
!= NULL
);
2150 switch (ELF32_R_TYPE (rel
->r_info
))
2152 /* GOT16 relocations */
2154 case R_PPC_GOT16_LO
:
2155 case R_PPC_GOT16_HI
:
2156 case R_PPC_GOT16_HA
:
2157 /* This symbol requires a global offset table entry. */
2162 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
2163 if (! _bfd_elf_create_got_section (dynobj
, info
))
2165 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2166 BFD_ASSERT (sgot
!= NULL
);
2170 && (h
!= NULL
|| info
->shared
))
2172 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
2173 if (srelgot
== NULL
)
2175 srelgot
= bfd_make_section (dynobj
, ".rela.got");
2177 || ! bfd_set_section_flags (dynobj
, srelgot
,
2182 | SEC_LINKER_CREATED
2184 || ! bfd_set_section_alignment (dynobj
, srelgot
, 2))
2191 if (h
->got
.refcount
== -1)
2193 /* Make sure this symbol is output as a dynamic symbol. */
2194 if (h
->dynindx
== -1)
2195 if (!bfd_elf32_link_record_dynamic_symbol (info
, h
))
2198 /* Allocate space in the .got. */
2199 sgot
->_raw_size
+= 4;
2200 /* Allocate relocation space. */
2201 srelgot
->_raw_size
+= sizeof (Elf32_External_Rela
);
2203 h
->got
.refcount
= 1;
2210 /* This is a global offset table entry for a local symbol. */
2211 if (local_got_refcounts
== NULL
)
2215 size
= symtab_hdr
->sh_info
* sizeof (bfd_signed_vma
);
2216 local_got_refcounts
= (bfd_signed_vma
*)
2217 bfd_alloc (abfd
, size
);
2218 if (local_got_refcounts
== NULL
)
2220 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2221 memset (local_got_refcounts
, -1, size
);
2223 if (local_got_refcounts
[r_symndx
] == -1)
2225 sgot
->_raw_size
+= 4;
2227 /* If we are generating a shared object, we need to
2228 output a R_PPC_RELATIVE reloc so that the
2229 dynamic linker can adjust this GOT entry. */
2231 srelgot
->_raw_size
+= sizeof (Elf32_External_Rela
);
2233 local_got_refcounts
[r_symndx
] = 1;
2236 local_got_refcounts
[r_symndx
]++;
2240 /* Indirect .sdata relocation */
2241 case R_PPC_EMB_SDAI16
:
2244 ((*_bfd_error_handler
)
2245 (_("%s: relocation %s cannot be used when making a shared object"),
2246 bfd_get_filename (abfd
), "R_PPC_EMB_SDAI16"));
2250 if (srelgot
== NULL
&& (h
!= NULL
|| info
->shared
))
2252 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
2253 if (srelgot
== NULL
)
2255 srelgot
= bfd_make_section (dynobj
, ".rela.got");
2257 || ! bfd_set_section_flags (dynobj
, srelgot
,
2262 | SEC_LINKER_CREATED
2264 || ! bfd_set_section_alignment (dynobj
, srelgot
, 2))
2269 if (!bfd_elf32_create_pointer_linker_section (abfd
, info
, sdata
, h
, rel
))
2274 /* Indirect .sdata2 relocation */
2275 case R_PPC_EMB_SDA2I16
:
2278 ((*_bfd_error_handler
)
2279 (_("%s: relocation %s cannot be used when making a shared object"),
2280 bfd_get_filename (abfd
), "R_PPC_EMB_SDA2I16"));
2284 if (srelgot
== NULL
&& (h
!= NULL
|| info
->shared
))
2286 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
2287 if (srelgot
== NULL
)
2289 srelgot
= bfd_make_section (dynobj
, ".rela.got");
2291 || ! bfd_set_section_flags (dynobj
, srelgot
,
2296 | SEC_LINKER_CREATED
2298 || ! bfd_set_section_alignment (dynobj
, srelgot
, 2))
2303 if (!bfd_elf32_create_pointer_linker_section (abfd
, info
, sdata2
, h
, rel
))
2308 case R_PPC_SDAREL16
:
2309 case R_PPC_EMB_SDA2REL
:
2310 case R_PPC_EMB_SDA21
:
2313 ((*_bfd_error_handler
)
2314 (_("%s: relocation %s cannot be used when making a shared object"),
2315 bfd_get_filename (abfd
),
2316 ppc_elf_howto_table
[(int) ELF32_R_TYPE (rel
->r_info
)]->name
));
2322 case R_PPC_PLTREL24
:
2323 case R_PPC_PLT16_LO
:
2324 case R_PPC_PLT16_HI
:
2325 case R_PPC_PLT16_HA
:
2327 fprintf (stderr
, "Reloc requires a PLT entry\n");
2329 /* This symbol requires a procedure linkage table entry. We
2330 actually build the entry in adjust_dynamic_symbol,
2331 because this might be a case of linking PIC code without
2332 linking in any dynamic objects, in which case we don't
2333 need to generate a procedure linkage table after all. */
2337 /* It does not make sense to have a procedure linkage
2338 table entry for a local symbol. */
2339 bfd_set_error (bfd_error_bad_value
);
2343 /* Make sure this symbol is output as a dynamic symbol. */
2344 if (h
->dynindx
== -1)
2346 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
2349 if (h
->plt
.refcount
== -1)
2351 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
2352 h
->plt
.refcount
= 1;
2358 /* The following relocations don't need to propagate the
2359 relocation if linking a shared object since they are
2360 section relative. */
2362 case R_PPC_SECTOFF_LO
:
2363 case R_PPC_SECTOFF_HI
:
2364 case R_PPC_SECTOFF_HA
:
2367 /* This refers only to functions defined in the shared library */
2368 case R_PPC_LOCAL24PC
:
2371 /* This relocation describes the C++ object vtable hierarchy.
2372 Reconstruct it for later use during GC. */
2373 case R_PPC_GNU_VTINHERIT
:
2374 if (!_bfd_elf32_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2378 /* This relocation describes which C++ vtable entries are actually
2379 used. Record for later use during GC. */
2380 case R_PPC_GNU_VTENTRY
:
2381 if (!_bfd_elf32_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2385 /* When creating a shared object, we must copy these
2386 relocs into the output file. We create a reloc
2387 section in dynobj and make room for the reloc. */
2390 case R_PPC_REL14_BRTAKEN
:
2391 case R_PPC_REL14_BRNTAKEN
:
2394 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
2395 || SYMBOL_REFERENCES_LOCAL (info
, h
))
2403 fprintf (stderr
, "ppc_elf_check_relocs need to create relocation for %s\n",
2404 (h
&& h
->root
.root
.string
) ? h
->root
.root
.string
: "<unknown>");
2410 name
= (bfd_elf_string_from_elf_section
2412 elf_elfheader (abfd
)->e_shstrndx
,
2413 elf_section_data (sec
)->rel_hdr
.sh_name
));
2417 BFD_ASSERT (strncmp (name
, ".rela", 5) == 0
2418 && strcmp (bfd_get_section_name (abfd
, sec
),
2421 sreloc
= bfd_get_section_by_name (dynobj
, name
);
2426 sreloc
= bfd_make_section (dynobj
, name
);
2427 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
2428 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
2429 if ((sec
->flags
& SEC_ALLOC
) != 0)
2430 flags
|= SEC_ALLOC
| SEC_LOAD
;
2432 || ! bfd_set_section_flags (dynobj
, sreloc
, flags
)
2433 || ! bfd_set_section_alignment (dynobj
, sreloc
, 2))
2438 sreloc
->_raw_size
+= sizeof (Elf32_External_Rela
);
2440 /* FIXME: We should here do what the m68k and i386
2441 backends do: if the reloc is pc-relative, record it
2442 in case it turns out that the reloc is unnecessary
2443 because the symbol is forced local by versioning or
2444 we are linking with -Bdynamic. Fortunately this
2445 case is not frequent. */
2455 /* Return the section that should be marked against GC for a given
2459 ppc_elf_gc_mark_hook (abfd
, info
, rel
, h
, sym
)
2461 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2462 Elf_Internal_Rela
*rel
;
2463 struct elf_link_hash_entry
*h
;
2464 Elf_Internal_Sym
*sym
;
2468 switch (ELF32_R_TYPE (rel
->r_info
))
2470 case R_PPC_GNU_VTINHERIT
:
2471 case R_PPC_GNU_VTENTRY
:
2475 switch (h
->root
.type
)
2477 case bfd_link_hash_defined
:
2478 case bfd_link_hash_defweak
:
2479 return h
->root
.u
.def
.section
;
2481 case bfd_link_hash_common
:
2482 return h
->root
.u
.c
.p
->section
;
2491 if (!(elf_bad_symtab (abfd
)
2492 && ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
2493 && ! ((sym
->st_shndx
<= 0 || sym
->st_shndx
>= SHN_LORESERVE
)
2494 && sym
->st_shndx
!= SHN_COMMON
))
2496 return bfd_section_from_elf_index (abfd
, sym
->st_shndx
);
2503 /* Update the got entry reference counts for the section being removed. */
2506 ppc_elf_gc_sweep_hook (abfd
, info
, sec
, relocs
)
2508 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2510 const Elf_Internal_Rela
*relocs
;
2512 Elf_Internal_Shdr
*symtab_hdr
;
2513 struct elf_link_hash_entry
**sym_hashes
;
2514 bfd_signed_vma
*local_got_refcounts
;
2515 const Elf_Internal_Rela
*rel
, *relend
;
2516 unsigned long r_symndx
;
2517 struct elf_link_hash_entry
*h
;
2519 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2520 sym_hashes
= elf_sym_hashes (abfd
);
2521 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2523 relend
= relocs
+ sec
->reloc_count
;
2524 for (rel
= relocs
; rel
< relend
; rel
++)
2525 switch (ELF32_R_TYPE (rel
->r_info
))
2528 case R_PPC_GOT16_LO
:
2529 case R_PPC_GOT16_HI
:
2530 case R_PPC_GOT16_HA
:
2531 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2532 if (r_symndx
>= symtab_hdr
->sh_info
)
2534 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2535 if (h
->got
.refcount
> 0)
2538 else if (local_got_refcounts
!= NULL
)
2540 if (local_got_refcounts
[r_symndx
] > 0)
2541 local_got_refcounts
[r_symndx
]--;
2546 case R_PPC_PLTREL24
:
2547 case R_PPC_PLT16_LO
:
2548 case R_PPC_PLT16_HI
:
2549 case R_PPC_PLT16_HA
:
2550 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2551 if (r_symndx
>= symtab_hdr
->sh_info
)
2553 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2554 if (h
->plt
.refcount
> 0)
2566 /* Hook called by the linker routine which adds symbols from an object
2567 file. We use it to put .comm items in .sbss, and not .bss. */
2570 ppc_elf_add_symbol_hook (abfd
, info
, sym
, namep
, flagsp
, secp
, valp
)
2572 struct bfd_link_info
*info
;
2573 const Elf_Internal_Sym
*sym
;
2574 const char **namep ATTRIBUTE_UNUSED
;
2575 flagword
*flagsp ATTRIBUTE_UNUSED
;
2579 if (sym
->st_shndx
== SHN_COMMON
2580 && !info
->relocateable
2581 && sym
->st_size
<= elf_gp_size (abfd
))
2583 /* Common symbols less than or equal to -G nn bytes are automatically
2585 elf_linker_section_t
*sdata
2586 = ppc_elf_create_linker_section (abfd
, info
, LINKER_SECTION_SDATA
);
2588 if (!sdata
->bss_section
)
2590 /* We don't go through bfd_make_section, because we don't
2591 want to attach this common section to DYNOBJ. The linker
2592 will move the symbols to the appropriate output section
2593 when it defines common symbols. */
2594 sdata
->bss_section
= ((asection
*)
2595 bfd_zalloc (abfd
, sizeof (asection
)));
2596 if (sdata
->bss_section
== NULL
)
2598 sdata
->bss_section
->name
= sdata
->bss_name
;
2599 sdata
->bss_section
->flags
= SEC_IS_COMMON
;
2600 sdata
->bss_section
->output_section
= sdata
->bss_section
;
2601 sdata
->bss_section
->symbol
=
2602 (asymbol
*) bfd_zalloc (abfd
, sizeof (asymbol
));
2603 sdata
->bss_section
->symbol_ptr_ptr
=
2604 (asymbol
**) bfd_zalloc (abfd
, sizeof (asymbol
*));
2605 if (sdata
->bss_section
->symbol
== NULL
2606 || sdata
->bss_section
->symbol_ptr_ptr
== NULL
)
2608 sdata
->bss_section
->symbol
->name
= sdata
->bss_name
;
2609 sdata
->bss_section
->symbol
->flags
= BSF_SECTION_SYM
;
2610 sdata
->bss_section
->symbol
->section
= sdata
->bss_section
;
2611 *sdata
->bss_section
->symbol_ptr_ptr
= sdata
->bss_section
->symbol
;
2614 *secp
= sdata
->bss_section
;
2615 *valp
= sym
->st_size
;
2621 /* Finish up dynamic symbol handling. We set the contents of various
2622 dynamic sections here. */
2625 ppc_elf_finish_dynamic_symbol (output_bfd
, info
, h
, sym
)
2627 struct bfd_link_info
*info
;
2628 struct elf_link_hash_entry
*h
;
2629 Elf_Internal_Sym
*sym
;
2634 fprintf (stderr
, "ppc_elf_finish_dynamic_symbol called for %s",
2635 h
->root
.root
.string
);
2638 dynobj
= elf_hash_table (info
)->dynobj
;
2639 BFD_ASSERT (dynobj
!= NULL
);
2641 if (h
->plt
.offset
!= (bfd_vma
) -1)
2645 Elf_Internal_Rela rela
;
2646 bfd_vma reloc_index
;
2649 fprintf (stderr
, ", plt_offset = %d", h
->plt
.offset
);
2652 /* This symbol has an entry in the procedure linkage table. Set
2655 BFD_ASSERT (h
->dynindx
!= -1);
2657 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2658 srela
= bfd_get_section_by_name (dynobj
, ".rela.plt");
2659 BFD_ASSERT (splt
!= NULL
&& srela
!= NULL
);
2661 /* We don't need to fill in the .plt. The ppc dynamic linker
2664 /* Fill in the entry in the .rela.plt section. */
2665 rela
.r_offset
= (splt
->output_section
->vma
2666 + splt
->output_offset
2668 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_PPC_JMP_SLOT
);
2671 reloc_index
= (h
->plt
.offset
- PLT_INITIAL_ENTRY_SIZE
) / PLT_SLOT_SIZE
;
2672 if (reloc_index
> PLT_NUM_SINGLE_ENTRIES
)
2673 reloc_index
-= (reloc_index
- PLT_NUM_SINGLE_ENTRIES
) / 2;
2674 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
2675 ((Elf32_External_Rela
*) srela
->contents
2678 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2680 /* Mark the symbol as undefined, rather than as defined in
2681 the .plt section. Leave the value alone. */
2682 sym
->st_shndx
= SHN_UNDEF
;
2683 /* If the symbol is weak, we do need to clear the value.
2684 Otherwise, the PLT entry would provide a definition for
2685 the symbol even if the symbol wasn't defined anywhere,
2686 and so the symbol would never be NULL. */
2687 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR_NONWEAK
)
2693 if (h
->got
.offset
!= (bfd_vma
) -1)
2697 Elf_Internal_Rela rela
;
2699 /* This symbol has an entry in the global offset table. Set it
2702 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2703 srela
= bfd_get_section_by_name (dynobj
, ".rela.got");
2704 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
2706 rela
.r_offset
= (sgot
->output_section
->vma
2707 + sgot
->output_offset
2708 + (h
->got
.offset
&~ 1));
2710 /* If this is a -Bsymbolic link, and the symbol is defined
2711 locally, we just want to emit a RELATIVE reloc. The entry in
2712 the global offset table will already have been initialized in
2713 the relocate_section function. */
2715 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2717 rela
.r_info
= ELF32_R_INFO (0, R_PPC_RELATIVE
);
2718 rela
.r_addend
= (h
->root
.u
.def
.value
2719 + h
->root
.u
.def
.section
->output_section
->vma
2720 + h
->root
.u
.def
.section
->output_offset
);
2724 BFD_ASSERT ((h
->got
.offset
& 1) == 0);
2725 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ h
->got
.offset
);
2726 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_PPC_GLOB_DAT
);
2730 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
2731 ((Elf32_External_Rela
*) srela
->contents
2732 + srela
->reloc_count
));
2733 ++srela
->reloc_count
;
2736 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_COPY
) != 0)
2739 Elf_Internal_Rela rela
;
2741 /* This symbols needs a copy reloc. Set it up. */
2744 fprintf (stderr
, ", copy");
2747 BFD_ASSERT (h
->dynindx
!= -1);
2749 if (h
->size
<= elf_gp_size (dynobj
))
2750 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
2753 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
2755 BFD_ASSERT (s
!= NULL
);
2757 rela
.r_offset
= (h
->root
.u
.def
.value
2758 + h
->root
.u
.def
.section
->output_section
->vma
2759 + h
->root
.u
.def
.section
->output_offset
);
2760 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_PPC_COPY
);
2762 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
2763 ((Elf32_External_Rela
*) s
->contents
2769 fprintf (stderr
, "\n");
2772 /* Mark some specially defined symbols as absolute. */
2773 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
2774 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
2775 || strcmp (h
->root
.root
.string
, "_PROCEDURE_LINKAGE_TABLE_") == 0)
2776 sym
->st_shndx
= SHN_ABS
;
2781 /* Finish up the dynamic sections. */
2784 ppc_elf_finish_dynamic_sections (output_bfd
, info
)
2786 struct bfd_link_info
*info
;
2789 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
2790 asection
*sgot
= bfd_get_section_by_name (dynobj
, ".got");
2793 fprintf (stderr
, "ppc_elf_finish_dynamic_sections called\n");
2796 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
2798 if (elf_hash_table (info
)->dynamic_sections_created
)
2801 Elf32_External_Dyn
*dyncon
, *dynconend
;
2803 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2804 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
2806 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
2807 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->_raw_size
);
2808 for (; dyncon
< dynconend
; dyncon
++)
2810 Elf_Internal_Dyn dyn
;
2814 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
2818 case DT_PLTGOT
: name
= ".plt"; size
= false; break;
2819 case DT_PLTRELSZ
: name
= ".rela.plt"; size
= true; break;
2820 case DT_JMPREL
: name
= ".rela.plt"; size
= false; break;
2821 default: name
= NULL
; size
= false; break;
2828 s
= bfd_get_section_by_name (output_bfd
, name
);
2834 dyn
.d_un
.d_ptr
= s
->vma
;
2837 if (s
->_cooked_size
!= 0)
2838 dyn
.d_un
.d_val
= s
->_cooked_size
;
2840 dyn
.d_un
.d_val
= s
->_raw_size
;
2843 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2848 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
2849 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
2852 unsigned char *contents
= sgot
->contents
;
2853 bfd_put_32 (output_bfd
, 0x4e800021 /* blrl */, contents
);
2856 bfd_put_32 (output_bfd
, (bfd_vma
) 0, contents
+4);
2858 bfd_put_32 (output_bfd
,
2859 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
2862 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
2868 /* The RELOCATE_SECTION function is called by the ELF backend linker
2869 to handle the relocations for a section.
2871 The relocs are always passed as Rela structures; if the section
2872 actually uses Rel structures, the r_addend field will always be
2875 This function is responsible for adjust the section contents as
2876 necessary, and (if using Rela relocs and generating a
2877 relocateable output file) adjusting the reloc addend as
2880 This function does not have to worry about setting the reloc
2881 address or the reloc symbol index.
2883 LOCAL_SYMS is a pointer to the swapped in local symbols.
2885 LOCAL_SECTIONS is an array giving the section in the input file
2886 corresponding to the st_shndx field of each local symbol.
2888 The global hash table entry for the global symbols can be found
2889 via elf_sym_hashes (input_bfd).
2891 When generating relocateable output, this function must handle
2892 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2893 going to be the section symbol corresponding to the output
2894 section, which means that the addend must be adjusted
2898 ppc_elf_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
2899 contents
, relocs
, local_syms
, local_sections
)
2901 struct bfd_link_info
*info
;
2903 asection
*input_section
;
2905 Elf_Internal_Rela
*relocs
;
2906 Elf_Internal_Sym
*local_syms
;
2907 asection
**local_sections
;
2909 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2910 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
2911 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
2912 elf_linker_section_t
*sdata
= (dynobj
) ? elf_linker_section (dynobj
, LINKER_SECTION_SDATA
) : NULL
;
2913 elf_linker_section_t
*sdata2
= (dynobj
) ? elf_linker_section (dynobj
, LINKER_SECTION_SDATA2
) : NULL
;
2914 Elf_Internal_Rela
*rel
= relocs
;
2915 Elf_Internal_Rela
*relend
= relocs
+ input_section
->reloc_count
;
2916 asection
*sreloc
= NULL
;
2919 bfd_vma
*local_got_offsets
;
2924 fprintf (stderr
, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n",
2925 bfd_get_filename (input_bfd
),
2926 bfd_section_name(input_bfd
, input_section
),
2927 (long) input_section
->reloc_count
,
2928 (info
->relocateable
) ? " (relocatable)" : "");
2931 if (!ppc_elf_howto_table
[R_PPC_ADDR32
])
2932 /* Initialize howto table if needed. */
2933 ppc_elf_howto_init ();
2935 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2940 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2941 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2944 for (; rel
< relend
; rel
++)
2946 enum elf_ppc_reloc_type r_type
= (enum elf_ppc_reloc_type
)ELF32_R_TYPE (rel
->r_info
);
2947 bfd_vma offset
= rel
->r_offset
;
2948 bfd_vma addend
= rel
->r_addend
;
2949 bfd_reloc_status_type r
= bfd_reloc_other
;
2950 Elf_Internal_Sym
*sym
= (Elf_Internal_Sym
*) 0;
2951 asection
*sec
= (asection
*) 0;
2952 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) 0;
2953 const char *sym_name
= (const char *) 0;
2954 reloc_howto_type
*howto
;
2955 unsigned long r_symndx
;
2957 int will_become_local
;
2959 /* Unknown relocation handling */
2960 if ((unsigned) r_type
>= (unsigned) R_PPC_max
2961 || !ppc_elf_howto_table
[(int) r_type
])
2963 (*_bfd_error_handler
) (_("%s: unknown relocation type %d"),
2964 bfd_get_filename (input_bfd
),
2967 bfd_set_error (bfd_error_bad_value
);
2972 howto
= ppc_elf_howto_table
[(int) r_type
];
2973 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2975 if (info
->relocateable
)
2977 /* This is a relocateable link. We don't have to change
2978 anything, unless the reloc is against a section symbol,
2979 in which case we have to adjust according to where the
2980 section symbol winds up in the output section. */
2981 if (r_symndx
< symtab_hdr
->sh_info
)
2983 sym
= local_syms
+ r_symndx
;
2984 if ((unsigned) ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
2986 sec
= local_sections
[r_symndx
];
2987 addend
= rel
->r_addend
+= sec
->output_offset
+ sym
->st_value
;
2992 fprintf (stderr
, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
3002 /* This is a final link. */
3003 if (r_symndx
< symtab_hdr
->sh_info
)
3005 sym
= local_syms
+ r_symndx
;
3006 sec
= local_sections
[r_symndx
];
3007 sym_name
= "<local symbol>";
3009 relocation
= (sec
->output_section
->vma
3010 + sec
->output_offset
3012 /* Relocs to local symbols are always resolved. */
3013 will_become_local
= 1;
3017 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3018 while (h
->root
.type
== bfd_link_hash_indirect
3019 || h
->root
.type
== bfd_link_hash_warning
)
3020 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3021 sym_name
= h
->root
.root
.string
;
3023 /* Can this relocation be resolved immediately? */
3024 will_become_local
= SYMBOL_REFERENCES_LOCAL (info
, h
);
3026 if (h
->root
.type
== bfd_link_hash_defined
3027 || h
->root
.type
== bfd_link_hash_defweak
)
3029 sec
= h
->root
.u
.def
.section
;
3030 if (((r_type
== R_PPC_PLT32
3031 || r_type
== R_PPC_PLTREL24
)
3033 && h
->plt
.offset
!= (bfd_vma
) -1)
3034 || (r_type
== R_PPC_LOCAL24PC
3035 && sec
->output_section
== NULL
)
3036 || ((r_type
== R_PPC_GOT16
3037 || r_type
== R_PPC_GOT16_LO
3038 || r_type
== R_PPC_GOT16_HI
3039 || r_type
== R_PPC_GOT16_HA
)
3040 && elf_hash_table (info
)->dynamic_sections_created
3041 && (! info
->shared
|| ! will_become_local
))
3043 && ! will_become_local
3044 && ((input_section
->flags
& SEC_ALLOC
) != 0
3045 /* Testing SEC_DEBUGGING here may be wrong.
3046 It's here to avoid a crash when
3047 generating a shared library with DWARF
3048 debugging information. */
3049 || ((input_section
->flags
& SEC_DEBUGGING
) != 0
3050 && (h
->elf_link_hash_flags
3051 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0))
3052 && (r_type
== R_PPC_ADDR32
3053 || r_type
== R_PPC_ADDR24
3054 || r_type
== R_PPC_ADDR16
3055 || r_type
== R_PPC_ADDR16_LO
3056 || r_type
== R_PPC_ADDR16_HI
3057 || r_type
== R_PPC_ADDR16_HA
3058 || r_type
== R_PPC_ADDR14
3059 || r_type
== R_PPC_ADDR14_BRTAKEN
3060 || r_type
== R_PPC_ADDR14_BRNTAKEN
3061 || r_type
== R_PPC_COPY
3062 || r_type
== R_PPC_GLOB_DAT
3063 || r_type
== R_PPC_JMP_SLOT
3064 || r_type
== R_PPC_UADDR32
3065 || r_type
== R_PPC_UADDR16
3066 || r_type
== R_PPC_SDAREL16
3067 || r_type
== R_PPC_EMB_NADDR32
3068 || r_type
== R_PPC_EMB_NADDR16
3069 || r_type
== R_PPC_EMB_NADDR16_LO
3070 || r_type
== R_PPC_EMB_NADDR16_HI
3071 || r_type
== R_PPC_EMB_NADDR16_HA
3072 || r_type
== R_PPC_EMB_SDAI16
3073 || r_type
== R_PPC_EMB_SDA2I16
3074 || r_type
== R_PPC_EMB_SDA2REL
3075 || r_type
== R_PPC_EMB_SDA21
3076 || r_type
== R_PPC_EMB_MRKREF
3077 || r_type
== R_PPC_EMB_BIT_FLD
3078 || r_type
== R_PPC_EMB_RELSDA
3079 || ((r_type
== R_PPC_REL24
3080 || r_type
== R_PPC_REL32
3081 || r_type
== R_PPC_REL14
3082 || r_type
== R_PPC_REL14_BRTAKEN
3083 || r_type
== R_PPC_REL14_BRNTAKEN
3084 || r_type
== R_PPC_RELATIVE
)
3085 && strcmp (h
->root
.root
.string
,
3086 "_GLOBAL_OFFSET_TABLE_") != 0))))
3088 /* In these cases, we don't need the relocation
3089 value. We check specially because in some
3090 obscure cases sec->output_section will be NULL. */
3093 else if (sec
->output_section
== NULL
)
3095 (*_bfd_error_handler
)
3096 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
3097 bfd_get_filename (input_bfd
), h
->root
.root
.string
,
3098 bfd_get_section_name (input_bfd
, input_section
));
3102 relocation
= (h
->root
.u
.def
.value
3103 + sec
->output_section
->vma
3104 + sec
->output_offset
);
3106 else if (h
->root
.type
== bfd_link_hash_undefweak
)
3108 else if (info
->shared
&& !info
->symbolic
&& !info
->no_undefined
3109 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
3113 if (! (*info
->callbacks
->undefined_symbol
) (info
,
3114 h
->root
.root
.string
,
3119 || info
->no_undefined
3120 || ELF_ST_VISIBILITY (h
->other
))))
3126 switch ((int) r_type
)
3129 (*_bfd_error_handler
) (_("%s: unknown relocation type %d for symbol %s"),
3130 bfd_get_filename (input_bfd
),
3131 (int) r_type
, sym_name
);
3133 bfd_set_error (bfd_error_bad_value
);
3137 /* Relocations that need no special processing. */
3138 case (int) R_PPC_LOCAL24PC
:
3139 /* It makes no sense to point a local relocation
3140 at a symbol not in this object. */
3142 && (h
->root
.type
== bfd_link_hash_defined
3143 || h
->root
.type
== bfd_link_hash_defweak
)
3144 && sec
->output_section
== NULL
)
3146 if (! (*info
->callbacks
->undefined_symbol
) (info
,
3147 h
->root
.root
.string
,
3157 /* Relocations that may need to be propagated if this is a shared
3159 case (int) R_PPC_REL24
:
3160 case (int) R_PPC_REL32
:
3161 case (int) R_PPC_REL14
:
3162 /* If these relocations are not to a named symbol, they can be
3163 handled right here, no need to bother the dynamic linker. */
3165 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
3166 || SYMBOL_REFERENCES_LOCAL (info
, h
))
3170 /* Relocations that always need to be propagated if this is a shared
3172 case (int) R_PPC_NONE
:
3173 case (int) R_PPC_ADDR32
:
3174 case (int) R_PPC_ADDR24
:
3175 case (int) R_PPC_ADDR16
:
3176 case (int) R_PPC_ADDR16_LO
:
3177 case (int) R_PPC_ADDR16_HI
:
3178 case (int) R_PPC_ADDR16_HA
:
3179 case (int) R_PPC_ADDR14
:
3180 case (int) R_PPC_UADDR32
:
3181 case (int) R_PPC_UADDR16
:
3184 Elf_Internal_Rela outrel
;
3188 fprintf (stderr
, "ppc_elf_relocate_section need to create relocation for %s\n",
3189 (h
&& h
->root
.root
.string
) ? h
->root
.root
.string
: "<unknown>");
3192 /* When generating a shared object, these relocations
3193 are copied into the output file to be resolved at run
3200 name
= (bfd_elf_string_from_elf_section
3202 elf_elfheader (input_bfd
)->e_shstrndx
,
3203 elf_section_data (input_section
)->rel_hdr
.sh_name
));
3207 BFD_ASSERT (strncmp (name
, ".rela", 5) == 0
3208 && strcmp (bfd_get_section_name (input_bfd
,
3212 sreloc
= bfd_get_section_by_name (dynobj
, name
);
3213 BFD_ASSERT (sreloc
!= NULL
);
3218 if (elf_section_data (input_section
)->stab_info
== NULL
)
3219 outrel
.r_offset
= rel
->r_offset
;
3224 off
= (_bfd_stab_section_offset
3225 (output_bfd
, &elf_hash_table (info
)->stab_info
,
3227 &elf_section_data (input_section
)->stab_info
,
3229 if (off
== (bfd_vma
) -1)
3231 outrel
.r_offset
= off
;
3234 outrel
.r_offset
+= (input_section
->output_section
->vma
3235 + input_section
->output_offset
);
3238 memset (&outrel
, 0, sizeof outrel
);
3239 /* h->dynindx may be -1 if this symbol was marked to
3241 else if (! will_become_local
)
3243 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3244 outrel
.r_addend
= rel
->r_addend
;
3248 if (r_type
== R_PPC_ADDR32
)
3250 outrel
.r_info
= ELF32_R_INFO (0, R_PPC_RELATIVE
);
3251 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3258 sec
= local_sections
[r_symndx
];
3261 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
3263 == bfd_link_hash_defweak
));
3264 sec
= h
->root
.u
.def
.section
;
3266 if (sec
!= NULL
&& bfd_is_abs_section (sec
))
3268 else if (sec
== NULL
|| sec
->owner
== NULL
)
3270 bfd_set_error (bfd_error_bad_value
);
3277 osec
= sec
->output_section
;
3278 indx
= elf_section_data (osec
)->dynindx
;
3279 BFD_ASSERT (indx
> 0);
3283 printf ("indx=%d section=%s flags=%08x name=%s\n",
3284 indx
, osec
->name
, osec
->flags
,
3285 h
->root
.root
.string
);
3290 outrel
.r_info
= ELF32_R_INFO (indx
, r_type
);
3291 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3295 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,
3296 (((Elf32_External_Rela
*)
3298 + sreloc
->reloc_count
));
3299 ++sreloc
->reloc_count
;
3301 /* This reloc will be computed at runtime, so there's no
3302 need to do anything now, unless this is a RELATIVE
3303 reloc in an unallocated section. */
3305 || (input_section
->flags
& SEC_ALLOC
) != 0
3306 || ELF32_R_TYPE (outrel
.r_info
) != R_PPC_RELATIVE
)
3310 /* Arithmetic adjust relocations that aren't going into a
3312 if (r_type
== R_PPC_ADDR16_HA
3313 /* It's just possible that this symbol is a weak symbol
3314 that's not actually defined anywhere. In that case,
3315 'sec' would be NULL, and we should leave the symbol
3316 alone (it will be set to zero elsewhere in the link). */
3319 addend
+= ((relocation
+ addend
) & 0x8000) << 1;
3323 /* branch taken prediction relocations */
3324 case (int) R_PPC_ADDR14_BRTAKEN
:
3325 case (int) R_PPC_REL14_BRTAKEN
:
3326 insn
= bfd_get_32 (output_bfd
, contents
+ offset
);
3327 if ((relocation
- offset
) & 0x8000)
3328 insn
&= ~BRANCH_PREDICT_BIT
;
3330 insn
|= BRANCH_PREDICT_BIT
;
3331 bfd_put_32 (output_bfd
, insn
, contents
+ offset
);
3334 /* branch not taken predicition relocations */
3335 case (int) R_PPC_ADDR14_BRNTAKEN
:
3336 case (int) R_PPC_REL14_BRNTAKEN
:
3337 insn
= bfd_get_32 (output_bfd
, contents
+ offset
);
3338 if ((relocation
- offset
) & 0x8000)
3339 insn
|= BRANCH_PREDICT_BIT
;
3341 insn
&= ~BRANCH_PREDICT_BIT
;
3342 bfd_put_32 (output_bfd
, insn
, contents
+ offset
);
3345 /* GOT16 relocations */
3346 case (int) R_PPC_GOT16
:
3347 case (int) R_PPC_GOT16_LO
:
3348 case (int) R_PPC_GOT16_HI
:
3349 case (int) R_PPC_GOT16_HA
:
3350 /* Relocation is to the entry for this symbol in the global
3352 BFD_ASSERT (sgot
!= NULL
);
3358 off
= h
->got
.offset
;
3359 BFD_ASSERT (off
!= (bfd_vma
) -1);
3361 if (! elf_hash_table (info
)->dynamic_sections_created
3363 && SYMBOL_REFERENCES_LOCAL (info
, h
)))
3365 /* This is actually a static link, or it is a
3366 -Bsymbolic link and the symbol is defined
3367 locally. We must initialize this entry in the
3368 global offset table. Since the offset must
3369 always be a multiple of 4, we use the least
3370 significant bit to record whether we have
3371 initialized it already.
3373 When doing a dynamic link, we create a .rela.got
3374 relocation entry to initialize the value. This
3375 is done in the finish_dynamic_symbol routine. */
3380 bfd_put_32 (output_bfd
, relocation
,
3381 sgot
->contents
+ off
);
3386 relocation
= sgot
->output_offset
+ off
- 4;
3392 BFD_ASSERT (local_got_offsets
!= NULL
3393 && local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
3395 off
= local_got_offsets
[r_symndx
];
3397 /* The offset must always be a multiple of 4. We use
3398 the least significant bit to record whether we have
3399 already processed this entry. */
3404 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
3409 Elf_Internal_Rela outrel
;
3411 /* We need to generate a R_PPC_RELATIVE reloc
3412 for the dynamic linker. */
3413 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
3414 BFD_ASSERT (srelgot
!= NULL
);
3416 outrel
.r_offset
= (sgot
->output_section
->vma
3417 + sgot
->output_offset
3419 outrel
.r_info
= ELF32_R_INFO (0, R_PPC_RELATIVE
);
3420 outrel
.r_addend
= relocation
;
3421 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,
3422 (((Elf32_External_Rela
*)
3424 + srelgot
->reloc_count
));
3425 ++srelgot
->reloc_count
;
3428 local_got_offsets
[r_symndx
] |= 1;
3431 relocation
= sgot
->output_offset
+ off
- 4;
3435 /* Indirect .sdata relocation */
3436 case (int) R_PPC_EMB_SDAI16
:
3437 BFD_ASSERT (sdata
!= NULL
);
3438 relocation
= bfd_elf32_finish_pointer_linker_section (output_bfd
, input_bfd
, info
,
3439 sdata
, h
, relocation
, rel
,
3443 /* Indirect .sdata2 relocation */
3444 case (int) R_PPC_EMB_SDA2I16
:
3445 BFD_ASSERT (sdata2
!= NULL
);
3446 relocation
= bfd_elf32_finish_pointer_linker_section (output_bfd
, input_bfd
, info
,
3447 sdata2
, h
, relocation
, rel
,
3451 /* Handle the TOC16 reloc. We want to use the offset within the .got
3452 section, not the actual VMA. This is appropriate when generating
3453 an embedded ELF object, for which the .got section acts like the
3454 AIX .toc section. */
3455 case (int) R_PPC_TOC16
: /* phony GOT16 relocations */
3456 BFD_ASSERT (sec
!= (asection
*) 0);
3457 BFD_ASSERT (bfd_is_und_section (sec
)
3458 || strcmp (bfd_get_section_name (abfd
, sec
), ".got") == 0
3459 || strcmp (bfd_get_section_name (abfd
, sec
), ".cgot") == 0)
3461 addend
-= sec
->output_section
->vma
+ sec
->output_offset
+ 0x8000;
3464 case (int) R_PPC_PLTREL24
:
3465 /* Relocation is to the entry for this symbol in the
3466 procedure linkage table. */
3467 BFD_ASSERT (h
!= NULL
);
3469 if (h
->plt
.offset
== (bfd_vma
) -1
3472 /* We didn't make a PLT entry for this symbol. This
3473 happens when statically linking PIC code, or when
3474 using -Bsymbolic. */
3478 relocation
= (splt
->output_section
->vma
3479 + splt
->output_offset
3483 /* relocate against _SDA_BASE_ */
3484 case (int) R_PPC_SDAREL16
:
3488 BFD_ASSERT (sec
!= (asection
*) 0);
3489 name
= bfd_get_section_name (abfd
, sec
->output_section
);
3490 if (strcmp (name
, ".sdata") != 0
3491 && strcmp (name
, ".sbss") != 0)
3493 (*_bfd_error_handler
) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3494 bfd_get_filename (input_bfd
),
3496 ppc_elf_howto_table
[(int) r_type
]->name
,
3499 addend
-= (sdata
->sym_hash
->root
.u
.def
.value
3500 + sdata
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3501 + sdata
->sym_hash
->root
.u
.def
.section
->output_offset
);
3505 /* relocate against _SDA2_BASE_ */
3506 case (int) R_PPC_EMB_SDA2REL
:
3510 BFD_ASSERT (sec
!= (asection
*) 0);
3511 name
= bfd_get_section_name (abfd
, sec
->output_section
);
3512 if (strcmp (name
, ".sdata2") != 0 && strcmp (name
, ".sbss2") != 0)
3514 (*_bfd_error_handler
) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3515 bfd_get_filename (input_bfd
),
3517 ppc_elf_howto_table
[(int) r_type
]->name
,
3520 bfd_set_error (bfd_error_bad_value
);
3524 addend
-= (sdata2
->sym_hash
->root
.u
.def
.value
3525 + sdata2
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3526 + sdata2
->sym_hash
->root
.u
.def
.section
->output_offset
);
3530 /* relocate against either _SDA_BASE_, _SDA2_BASE_, or 0 */
3531 case (int) R_PPC_EMB_SDA21
:
3532 case (int) R_PPC_EMB_RELSDA
:
3537 BFD_ASSERT (sec
!= (asection
*) 0);
3538 name
= bfd_get_section_name (abfd
, sec
->output_section
);
3539 if (strcmp (name
, ".sdata") == 0 || strcmp (name
, ".sbss") == 0)
3542 addend
-= (sdata
->sym_hash
->root
.u
.def
.value
3543 + sdata
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3544 + sdata
->sym_hash
->root
.u
.def
.section
->output_offset
);
3547 else if (strcmp (name
, ".sdata2") == 0
3548 || strcmp (name
, ".sbss2") == 0)
3551 addend
-= (sdata2
->sym_hash
->root
.u
.def
.value
3552 + sdata2
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3553 + sdata2
->sym_hash
->root
.u
.def
.section
->output_offset
);
3556 else if (strcmp (name
, ".PPC.EMB.sdata0") == 0
3557 || strcmp (name
, ".PPC.EMB.sbss0") == 0)
3564 (*_bfd_error_handler
) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3565 bfd_get_filename (input_bfd
),
3567 ppc_elf_howto_table
[(int) r_type
]->name
,
3570 bfd_set_error (bfd_error_bad_value
);
3575 if (r_type
== R_PPC_EMB_SDA21
)
3576 { /* fill in register field */
3577 insn
= bfd_get_32 (output_bfd
, contents
+ offset
);
3578 insn
= (insn
& ~RA_REGISTER_MASK
) | (reg
<< RA_REGISTER_SHIFT
);
3579 bfd_put_32 (output_bfd
, insn
, contents
+ offset
);
3584 /* Relocate against the beginning of the section */
3585 case (int) R_PPC_SECTOFF
:
3586 case (int) R_PPC_SECTOFF_LO
:
3587 case (int) R_PPC_SECTOFF_HI
:
3588 BFD_ASSERT (sec
!= (asection
*) 0);
3589 addend
-= sec
->output_section
->vma
;
3592 case (int) R_PPC_SECTOFF_HA
:
3593 BFD_ASSERT (sec
!= (asection
*) 0);
3594 addend
-= sec
->output_section
->vma
;
3595 addend
+= ((relocation
+ addend
) & 0x8000) << 1;
3598 /* Negative relocations */
3599 case (int) R_PPC_EMB_NADDR32
:
3600 case (int) R_PPC_EMB_NADDR16
:
3601 case (int) R_PPC_EMB_NADDR16_LO
:
3602 case (int) R_PPC_EMB_NADDR16_HI
:
3603 addend
-= 2 * relocation
;
3606 case (int) R_PPC_EMB_NADDR16_HA
:
3607 addend
-= 2 * relocation
;
3608 addend
+= ((relocation
+ addend
) & 0x8000) << 1;
3611 /* NOP relocation that prevents garbage collecting linkers from omitting a
3613 case (int) R_PPC_EMB_MRKREF
:
3616 case (int) R_PPC_COPY
:
3617 case (int) R_PPC_GLOB_DAT
:
3618 case (int) R_PPC_JMP_SLOT
:
3619 case (int) R_PPC_RELATIVE
:
3620 case (int) R_PPC_PLT32
:
3621 case (int) R_PPC_PLTREL32
:
3622 case (int) R_PPC_PLT16_LO
:
3623 case (int) R_PPC_PLT16_HI
:
3624 case (int) R_PPC_PLT16_HA
:
3625 case (int) R_PPC_EMB_RELSEC16
:
3626 case (int) R_PPC_EMB_RELST_LO
:
3627 case (int) R_PPC_EMB_RELST_HI
:
3628 case (int) R_PPC_EMB_RELST_HA
:
3629 case (int) R_PPC_EMB_BIT_FLD
:
3630 (*_bfd_error_handler
) (_("%s: Relocation %s is not yet supported for symbol %s."),
3631 bfd_get_filename (input_bfd
),
3632 ppc_elf_howto_table
[(int) r_type
]->name
,
3635 bfd_set_error (bfd_error_invalid_operation
);
3639 case (int) R_PPC_GNU_VTINHERIT
:
3640 case (int) R_PPC_GNU_VTENTRY
:
3641 /* These are no-ops in the end. */
3646 fprintf (stderr
, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n",
3655 r
= _bfd_final_link_relocate (howto
,
3663 if (r
== bfd_reloc_ok
)
3665 else if (r
== bfd_reloc_overflow
)
3671 if (h
->root
.type
== bfd_link_hash_undefweak
3672 && howto
->pc_relative
)
3674 /* Assume this is a call protected by other code that
3675 detect the symbol is undefined. If this is the case,
3676 we can safely ignore the overflow. If not, the
3677 program is hosed anyway, and a little warning isn't
3683 name
= h
->root
.root
.string
;
3687 name
= bfd_elf_string_from_elf_section (input_bfd
,
3688 symtab_hdr
->sh_link
,
3693 name
= bfd_section_name (input_bfd
, sec
);
3696 if (! (*info
->callbacks
->reloc_overflow
) (info
,
3710 fprintf (stderr
, "\n");
3716 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
3717 #define TARGET_LITTLE_NAME "elf32-powerpcle"
3718 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
3719 #define TARGET_BIG_NAME "elf32-powerpc"
3720 #define ELF_ARCH bfd_arch_powerpc
3721 #define ELF_MACHINE_CODE EM_PPC
3722 #define ELF_MAXPAGESIZE 0x10000
3723 #define elf_info_to_howto ppc_elf_info_to_howto
3725 #ifdef EM_CYGNUS_POWERPC
3726 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
3730 #define ELF_MACHINE_ALT2 EM_PPC_OLD
3733 #define elf_backend_plt_not_loaded 1
3734 #define elf_backend_got_symbol_offset 4
3735 #define elf_backend_can_gc_sections 1
3736 #define elf_backend_got_header_size 12
3737 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
3739 #define bfd_elf32_bfd_copy_private_bfd_data ppc_elf_copy_private_bfd_data
3740 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
3741 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
3742 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
3743 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
3744 #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
3746 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
3747 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
3748 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
3749 #define elf_backend_relocate_section ppc_elf_relocate_section
3750 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
3751 #define elf_backend_check_relocs ppc_elf_check_relocs
3752 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
3753 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
3754 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
3755 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
3756 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
3757 #define elf_backend_fake_sections ppc_elf_fake_sections
3758 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
3759 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
3761 #include "elf32-target.h"