1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 95, 96, 97, 98, 1999 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 /* This file is based on a preliminary PowerPC ELF ABI. The
22 information may not match the final PowerPC ELF ABI. It includes
23 suggestions from the in-progress Embedded PowerPC ABI, and that
24 information may also not match. */
33 #define USE_RELA /* we want RELA relocations, not REL */
35 static reloc_howto_type
*ppc_elf_reloc_type_lookup
36 PARAMS ((bfd
*abfd
, bfd_reloc_code_real_type code
));
37 static void ppc_elf_info_to_howto
38 PARAMS ((bfd
*abfd
, arelent
*cache_ptr
, Elf32_Internal_Rela
*dst
));
39 static void ppc_elf_howto_init
PARAMS ((void));
40 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
41 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
42 static boolean ppc_elf_set_private_flags
PARAMS ((bfd
*, flagword
));
43 static boolean ppc_elf_copy_private_bfd_data
PARAMS ((bfd
*, bfd
*));
44 static boolean ppc_elf_merge_private_bfd_data
PARAMS ((bfd
*, bfd
*));
46 static int ppc_elf_additional_program_headers
PARAMS ((bfd
*));
47 static boolean ppc_elf_modify_segment_map
PARAMS ((bfd
*));
49 static boolean ppc_elf_create_dynamic_sections
50 PARAMS ((bfd
*, struct bfd_link_info
*));
52 static boolean ppc_elf_section_from_shdr
PARAMS ((bfd
*,
53 Elf32_Internal_Shdr
*,
55 static boolean ppc_elf_fake_sections
56 PARAMS ((bfd
*, Elf32_Internal_Shdr
*, asection
*));
58 static elf_linker_section_t
*ppc_elf_create_linker_section
60 struct bfd_link_info
*info
,
61 enum elf_linker_section_enum
));
63 static boolean ppc_elf_check_relocs
PARAMS ((bfd
*,
64 struct bfd_link_info
*,
66 const Elf_Internal_Rela
*));
68 static asection
* ppc_elf_gc_mark_hook
PARAMS ((bfd
*abfd
,
69 struct bfd_link_info
*info
,
70 Elf_Internal_Rela
*rel
,
71 struct elf_link_hash_entry
*h
,
72 Elf_Internal_Sym
*sym
));
74 static boolean ppc_elf_gc_sweep_hook
PARAMS ((bfd
*abfd
,
75 struct bfd_link_info
*info
,
77 const Elf_Internal_Rela
*relocs
));
79 static boolean ppc_elf_adjust_dynamic_symbol
PARAMS ((struct bfd_link_info
*,
80 struct elf_link_hash_entry
*));
82 static boolean ppc_elf_size_dynamic_sections
PARAMS ((bfd
*, struct bfd_link_info
*));
84 static boolean ppc_elf_relocate_section
PARAMS ((bfd
*,
85 struct bfd_link_info
*info
,
89 Elf_Internal_Rela
*relocs
,
90 Elf_Internal_Sym
*local_syms
,
93 static boolean ppc_elf_add_symbol_hook
PARAMS ((bfd
*,
94 struct bfd_link_info
*,
95 const Elf_Internal_Sym
*,
101 static boolean ppc_elf_finish_dynamic_symbol
PARAMS ((bfd
*,
102 struct bfd_link_info
*,
103 struct elf_link_hash_entry
*,
104 Elf_Internal_Sym
*));
106 static boolean ppc_elf_finish_dynamic_sections
PARAMS ((bfd
*, struct bfd_link_info
*));
108 #define BRANCH_PREDICT_BIT 0x200000 /* branch prediction bit for branch taken relocs */
109 #define RA_REGISTER_MASK 0x001f0000 /* mask to set RA in memory instructions */
110 #define RA_REGISTER_SHIFT 16 /* value to shift register by to insert RA */
112 /* The name of the dynamic interpreter. This is put in the .interp
115 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
117 /* The size in bytes of an entry in the procedure linkage table. */
118 #define PLT_ENTRY_SIZE 12
119 /* The initial size of the plt reserved for the dynamic linker. */
120 #define PLT_INITIAL_ENTRY_SIZE 72
121 /* The size of the gap between entries in the PLT. */
122 #define PLT_SLOT_SIZE 8
123 /* The number of single-slot PLT entries (the rest use two slots). */
124 #define PLT_NUM_SINGLE_ENTRIES 8192
126 /* Will references to this symbol always reference the symbol
128 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
131 || H->dynindx == -1 \
132 || ELF_ST_VISIBILITY (H->other) == STV_INTERNAL \
133 || ELF_ST_VISIBILITY (H->other) == STV_HIDDEN) \
134 && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
136 /* Will _calls_ to this symbol always call the version in this object? */
137 #define SYMBOL_CALLS_LOCAL(INFO, H) \
140 || H->dynindx == -1 \
141 || ELF_ST_VISIBILITY (H->other) != STV_DEFAULT) \
142 && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
144 static reloc_howto_type
*ppc_elf_howto_table
[ (int)R_PPC_max
];
146 static reloc_howto_type ppc_elf_howto_raw
[] =
148 /* This reloc does nothing. */
149 HOWTO (R_PPC_NONE
, /* type */
151 2, /* size (0 = byte, 1 = short, 2 = long) */
153 false, /* pc_relative */
155 complain_overflow_bitfield
, /* complain_on_overflow */
156 bfd_elf_generic_reloc
, /* special_function */
157 "R_PPC_NONE", /* name */
158 false, /* partial_inplace */
161 false), /* pcrel_offset */
163 /* A standard 32 bit relocation. */
164 HOWTO (R_PPC_ADDR32
, /* type */
166 2, /* size (0 = byte, 1 = short, 2 = long) */
168 false, /* pc_relative */
170 complain_overflow_bitfield
, /* complain_on_overflow */
171 bfd_elf_generic_reloc
, /* special_function */
172 "R_PPC_ADDR32", /* name */
173 false, /* partial_inplace */
175 0xffffffff, /* dst_mask */
176 false), /* pcrel_offset */
178 /* An absolute 26 bit branch; the lower two bits must be zero.
179 FIXME: we don't check that, we just clear them. */
180 HOWTO (R_PPC_ADDR24
, /* type */
182 2, /* size (0 = byte, 1 = short, 2 = long) */
184 false, /* pc_relative */
186 complain_overflow_bitfield
, /* complain_on_overflow */
187 bfd_elf_generic_reloc
, /* special_function */
188 "R_PPC_ADDR24", /* name */
189 false, /* partial_inplace */
191 0x3fffffc, /* dst_mask */
192 false), /* pcrel_offset */
194 /* A standard 16 bit relocation. */
195 HOWTO (R_PPC_ADDR16
, /* type */
197 1, /* size (0 = byte, 1 = short, 2 = long) */
199 false, /* pc_relative */
201 complain_overflow_bitfield
, /* complain_on_overflow */
202 bfd_elf_generic_reloc
, /* special_function */
203 "R_PPC_ADDR16", /* name */
204 false, /* partial_inplace */
206 0xffff, /* dst_mask */
207 false), /* pcrel_offset */
209 /* A 16 bit relocation without overflow. */
210 HOWTO (R_PPC_ADDR16_LO
, /* type */
212 1, /* size (0 = byte, 1 = short, 2 = long) */
214 false, /* pc_relative */
216 complain_overflow_dont
,/* complain_on_overflow */
217 bfd_elf_generic_reloc
, /* special_function */
218 "R_PPC_ADDR16_LO", /* name */
219 false, /* partial_inplace */
221 0xffff, /* dst_mask */
222 false), /* pcrel_offset */
224 /* The high order 16 bits of an address. */
225 HOWTO (R_PPC_ADDR16_HI
, /* type */
227 1, /* size (0 = byte, 1 = short, 2 = long) */
229 false, /* pc_relative */
231 complain_overflow_dont
, /* complain_on_overflow */
232 bfd_elf_generic_reloc
, /* special_function */
233 "R_PPC_ADDR16_HI", /* name */
234 false, /* partial_inplace */
236 0xffff, /* dst_mask */
237 false), /* pcrel_offset */
239 /* The high order 16 bits of an address, plus 1 if the contents of
240 the low 16 bits, treated as a signed number, is negative. */
241 HOWTO (R_PPC_ADDR16_HA
, /* type */
243 1, /* size (0 = byte, 1 = short, 2 = long) */
245 false, /* pc_relative */
247 complain_overflow_dont
, /* complain_on_overflow */
248 ppc_elf_addr16_ha_reloc
, /* special_function */
249 "R_PPC_ADDR16_HA", /* name */
250 false, /* partial_inplace */
252 0xffff, /* dst_mask */
253 false), /* pcrel_offset */
255 /* An absolute 16 bit branch; the lower two bits must be zero.
256 FIXME: we don't check that, we just clear them. */
257 HOWTO (R_PPC_ADDR14
, /* type */
259 2, /* size (0 = byte, 1 = short, 2 = long) */
261 false, /* pc_relative */
263 complain_overflow_bitfield
, /* complain_on_overflow */
264 bfd_elf_generic_reloc
, /* special_function */
265 "R_PPC_ADDR14", /* name */
266 false, /* partial_inplace */
268 0xfffc, /* dst_mask */
269 false), /* pcrel_offset */
271 /* An absolute 16 bit branch, for which bit 10 should be set to
272 indicate that the branch is expected to be taken. The lower two
273 bits must be zero. */
274 HOWTO (R_PPC_ADDR14_BRTAKEN
, /* type */
276 2, /* size (0 = byte, 1 = short, 2 = long) */
278 false, /* pc_relative */
280 complain_overflow_bitfield
, /* complain_on_overflow */
281 bfd_elf_generic_reloc
, /* special_function */
282 "R_PPC_ADDR14_BRTAKEN",/* name */
283 false, /* partial_inplace */
285 0xfffc, /* dst_mask */
286 false), /* pcrel_offset */
288 /* An absolute 16 bit branch, for which bit 10 should be set to
289 indicate that the branch is not expected to be taken. The lower
290 two bits must be zero. */
291 HOWTO (R_PPC_ADDR14_BRNTAKEN
, /* type */
293 2, /* size (0 = byte, 1 = short, 2 = long) */
295 false, /* pc_relative */
297 complain_overflow_bitfield
, /* complain_on_overflow */
298 bfd_elf_generic_reloc
, /* special_function */
299 "R_PPC_ADDR14_BRNTAKEN",/* name */
300 false, /* partial_inplace */
302 0xfffc, /* dst_mask */
303 false), /* pcrel_offset */
305 /* A relative 26 bit branch; the lower two bits must be zero. */
306 HOWTO (R_PPC_REL24
, /* type */
308 2, /* size (0 = byte, 1 = short, 2 = long) */
310 true, /* pc_relative */
312 complain_overflow_signed
, /* complain_on_overflow */
313 bfd_elf_generic_reloc
, /* special_function */
314 "R_PPC_REL24", /* name */
315 false, /* partial_inplace */
317 0x3fffffc, /* dst_mask */
318 true), /* pcrel_offset */
320 /* A relative 16 bit branch; the lower two bits must be zero. */
321 HOWTO (R_PPC_REL14
, /* type */
323 2, /* size (0 = byte, 1 = short, 2 = long) */
325 true, /* pc_relative */
327 complain_overflow_signed
, /* complain_on_overflow */
328 bfd_elf_generic_reloc
, /* special_function */
329 "R_PPC_REL14", /* name */
330 false, /* partial_inplace */
332 0xfffc, /* dst_mask */
333 true), /* pcrel_offset */
335 /* A relative 16 bit branch. Bit 10 should be set to indicate that
336 the branch is expected to be taken. The lower two bits must be
338 HOWTO (R_PPC_REL14_BRTAKEN
, /* type */
340 2, /* size (0 = byte, 1 = short, 2 = long) */
342 true, /* pc_relative */
344 complain_overflow_signed
, /* complain_on_overflow */
345 bfd_elf_generic_reloc
, /* special_function */
346 "R_PPC_REL14_BRTAKEN", /* name */
347 false, /* partial_inplace */
349 0xfffc, /* dst_mask */
350 true), /* pcrel_offset */
352 /* A relative 16 bit branch. Bit 10 should be set to indicate that
353 the branch is not expected to be taken. The lower two bits must
355 HOWTO (R_PPC_REL14_BRNTAKEN
, /* type */
357 2, /* size (0 = byte, 1 = short, 2 = long) */
359 true, /* pc_relative */
361 complain_overflow_signed
, /* complain_on_overflow */
362 bfd_elf_generic_reloc
, /* special_function */
363 "R_PPC_REL14_BRNTAKEN",/* name */
364 false, /* partial_inplace */
366 0xfffc, /* dst_mask */
367 true), /* pcrel_offset */
369 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
371 HOWTO (R_PPC_GOT16
, /* type */
373 1, /* size (0 = byte, 1 = short, 2 = long) */
375 false, /* pc_relative */
377 complain_overflow_signed
, /* complain_on_overflow */
378 bfd_elf_generic_reloc
, /* special_function */
379 "R_PPC_GOT16", /* name */
380 false, /* partial_inplace */
382 0xffff, /* dst_mask */
383 false), /* pcrel_offset */
385 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
387 HOWTO (R_PPC_GOT16_LO
, /* type */
389 1, /* size (0 = byte, 1 = short, 2 = long) */
391 false, /* pc_relative */
393 complain_overflow_dont
, /* complain_on_overflow */
394 bfd_elf_generic_reloc
, /* special_function */
395 "R_PPC_GOT16_LO", /* name */
396 false, /* partial_inplace */
398 0xffff, /* dst_mask */
399 false), /* pcrel_offset */
401 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
403 HOWTO (R_PPC_GOT16_HI
, /* type */
405 1, /* size (0 = byte, 1 = short, 2 = long) */
407 false, /* pc_relative */
409 complain_overflow_bitfield
, /* complain_on_overflow */
410 bfd_elf_generic_reloc
, /* special_function */
411 "R_PPC_GOT16_HI", /* name */
412 false, /* partial_inplace */
414 0xffff, /* dst_mask */
415 false), /* pcrel_offset */
417 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
419 HOWTO (R_PPC_GOT16_HA
, /* type */
421 1, /* size (0 = byte, 1 = short, 2 = long) */
423 false, /* pc_relative */
425 complain_overflow_bitfield
, /* complain_on_overflow */
426 ppc_elf_addr16_ha_reloc
, /* special_function */
427 "R_PPC_GOT16_HA", /* name */
428 false, /* partial_inplace */
430 0xffff, /* dst_mask */
431 false), /* pcrel_offset */
433 /* Like R_PPC_REL24, but referring to the procedure linkage table
434 entry for the symbol. */
435 HOWTO (R_PPC_PLTREL24
, /* type */
437 2, /* size (0 = byte, 1 = short, 2 = long) */
439 true, /* pc_relative */
441 complain_overflow_signed
, /* complain_on_overflow */
442 bfd_elf_generic_reloc
, /* special_function */
443 "R_PPC_PLTREL24", /* name */
444 false, /* partial_inplace */
446 0x3fffffc, /* dst_mask */
447 true), /* pcrel_offset */
449 /* This is used only by the dynamic linker. The symbol should exist
450 both in the object being run and in some shared library. The
451 dynamic linker copies the data addressed by the symbol from the
452 shared library into the object, because the object being
453 run has to have the data at some particular address. */
454 HOWTO (R_PPC_COPY
, /* type */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
458 false, /* pc_relative */
460 complain_overflow_bitfield
, /* complain_on_overflow */
461 bfd_elf_generic_reloc
, /* special_function */
462 "R_PPC_COPY", /* name */
463 false, /* partial_inplace */
466 false), /* pcrel_offset */
468 /* Like R_PPC_ADDR32, but used when setting global offset table
470 HOWTO (R_PPC_GLOB_DAT
, /* type */
472 2, /* size (0 = byte, 1 = short, 2 = long) */
474 false, /* pc_relative */
476 complain_overflow_bitfield
, /* complain_on_overflow */
477 bfd_elf_generic_reloc
, /* special_function */
478 "R_PPC_GLOB_DAT", /* name */
479 false, /* partial_inplace */
481 0xffffffff, /* dst_mask */
482 false), /* pcrel_offset */
484 /* Marks a procedure linkage table entry for a symbol. */
485 HOWTO (R_PPC_JMP_SLOT
, /* type */
487 2, /* size (0 = byte, 1 = short, 2 = long) */
489 false, /* pc_relative */
491 complain_overflow_bitfield
, /* complain_on_overflow */
492 bfd_elf_generic_reloc
, /* special_function */
493 "R_PPC_JMP_SLOT", /* name */
494 false, /* partial_inplace */
497 false), /* pcrel_offset */
499 /* Used only by the dynamic linker. When the object is run, this
500 longword is set to the load address of the object, plus the
502 HOWTO (R_PPC_RELATIVE
, /* type */
504 2, /* size (0 = byte, 1 = short, 2 = long) */
506 false, /* pc_relative */
508 complain_overflow_bitfield
, /* complain_on_overflow */
509 bfd_elf_generic_reloc
, /* special_function */
510 "R_PPC_RELATIVE", /* name */
511 false, /* partial_inplace */
513 0xffffffff, /* dst_mask */
514 false), /* pcrel_offset */
516 /* Like R_PPC_REL24, but uses the value of the symbol within the
517 object rather than the final value. Normally used for
518 _GLOBAL_OFFSET_TABLE_. */
519 HOWTO (R_PPC_LOCAL24PC
, /* type */
521 2, /* size (0 = byte, 1 = short, 2 = long) */
523 true, /* pc_relative */
525 complain_overflow_signed
, /* complain_on_overflow */
526 bfd_elf_generic_reloc
, /* special_function */
527 "R_PPC_LOCAL24PC", /* name */
528 false, /* partial_inplace */
530 0x3fffffc, /* dst_mask */
531 true), /* pcrel_offset */
533 /* Like R_PPC_ADDR32, but may be unaligned. */
534 HOWTO (R_PPC_UADDR32
, /* type */
536 2, /* size (0 = byte, 1 = short, 2 = long) */
538 false, /* pc_relative */
540 complain_overflow_bitfield
, /* complain_on_overflow */
541 bfd_elf_generic_reloc
, /* special_function */
542 "R_PPC_UADDR32", /* name */
543 false, /* partial_inplace */
545 0xffffffff, /* dst_mask */
546 false), /* pcrel_offset */
548 /* Like R_PPC_ADDR16, but may be unaligned. */
549 HOWTO (R_PPC_UADDR16
, /* type */
551 1, /* size (0 = byte, 1 = short, 2 = long) */
553 false, /* pc_relative */
555 complain_overflow_bitfield
, /* complain_on_overflow */
556 bfd_elf_generic_reloc
, /* special_function */
557 "R_PPC_UADDR16", /* name */
558 false, /* partial_inplace */
560 0xffff, /* dst_mask */
561 false), /* pcrel_offset */
563 /* 32-bit PC relative */
564 HOWTO (R_PPC_REL32
, /* type */
566 2, /* size (0 = byte, 1 = short, 2 = long) */
568 true, /* pc_relative */
570 complain_overflow_bitfield
, /* complain_on_overflow */
571 bfd_elf_generic_reloc
, /* special_function */
572 "R_PPC_REL32", /* name */
573 false, /* partial_inplace */
575 0xffffffff, /* dst_mask */
576 true), /* pcrel_offset */
578 /* 32-bit relocation to the symbol's procedure linkage table.
579 FIXME: not supported. */
580 HOWTO (R_PPC_PLT32
, /* type */
582 2, /* size (0 = byte, 1 = short, 2 = long) */
584 false, /* pc_relative */
586 complain_overflow_bitfield
, /* complain_on_overflow */
587 bfd_elf_generic_reloc
, /* special_function */
588 "R_PPC_PLT32", /* name */
589 false, /* partial_inplace */
592 false), /* pcrel_offset */
594 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
595 FIXME: not supported. */
596 HOWTO (R_PPC_PLTREL32
, /* type */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
600 true, /* pc_relative */
602 complain_overflow_bitfield
, /* complain_on_overflow */
603 bfd_elf_generic_reloc
, /* special_function */
604 "R_PPC_PLTREL32", /* name */
605 false, /* partial_inplace */
608 true), /* pcrel_offset */
610 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
612 HOWTO (R_PPC_PLT16_LO
, /* type */
614 1, /* size (0 = byte, 1 = short, 2 = long) */
616 false, /* pc_relative */
618 complain_overflow_dont
, /* complain_on_overflow */
619 bfd_elf_generic_reloc
, /* special_function */
620 "R_PPC_PLT16_LO", /* name */
621 false, /* partial_inplace */
623 0xffff, /* dst_mask */
624 false), /* pcrel_offset */
626 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
628 HOWTO (R_PPC_PLT16_HI
, /* type */
630 1, /* size (0 = byte, 1 = short, 2 = long) */
632 false, /* pc_relative */
634 complain_overflow_bitfield
, /* complain_on_overflow */
635 bfd_elf_generic_reloc
, /* special_function */
636 "R_PPC_PLT16_HI", /* name */
637 false, /* partial_inplace */
639 0xffff, /* dst_mask */
640 false), /* pcrel_offset */
642 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
644 HOWTO (R_PPC_PLT16_HA
, /* type */
646 1, /* size (0 = byte, 1 = short, 2 = long) */
648 false, /* pc_relative */
650 complain_overflow_bitfield
, /* complain_on_overflow */
651 ppc_elf_addr16_ha_reloc
, /* special_function */
652 "R_PPC_PLT16_HA", /* name */
653 false, /* partial_inplace */
655 0xffff, /* dst_mask */
656 false), /* pcrel_offset */
658 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
660 HOWTO (R_PPC_SDAREL16
, /* type */
662 1, /* size (0 = byte, 1 = short, 2 = long) */
664 false, /* pc_relative */
666 complain_overflow_signed
, /* complain_on_overflow */
667 bfd_elf_generic_reloc
, /* special_function */
668 "R_PPC_SDAREL16", /* name */
669 false, /* partial_inplace */
671 0xffff, /* dst_mask */
672 false), /* pcrel_offset */
674 /* 32-bit section relative relocation. */
675 HOWTO (R_PPC_SECTOFF
, /* type */
677 2, /* size (0 = byte, 1 = short, 2 = long) */
679 true, /* pc_relative */
681 complain_overflow_bitfield
, /* complain_on_overflow */
682 bfd_elf_generic_reloc
, /* special_function */
683 "R_PPC_SECTOFF", /* name */
684 false, /* partial_inplace */
687 true), /* pcrel_offset */
689 /* 16-bit lower half section relative relocation. */
690 HOWTO (R_PPC_SECTOFF_LO
, /* type */
692 1, /* size (0 = byte, 1 = short, 2 = long) */
694 false, /* pc_relative */
696 complain_overflow_dont
, /* complain_on_overflow */
697 bfd_elf_generic_reloc
, /* special_function */
698 "R_PPC_SECTOFF_LO", /* name */
699 false, /* partial_inplace */
701 0xffff, /* dst_mask */
702 false), /* pcrel_offset */
704 /* 16-bit upper half section relative relocation. */
705 HOWTO (R_PPC_SECTOFF_HI
, /* type */
707 1, /* size (0 = byte, 1 = short, 2 = long) */
709 false, /* pc_relative */
711 complain_overflow_bitfield
, /* complain_on_overflow */
712 bfd_elf_generic_reloc
, /* special_function */
713 "R_PPC_SECTOFF_HI", /* name */
714 false, /* partial_inplace */
716 0xffff, /* dst_mask */
717 false), /* pcrel_offset */
719 /* 16-bit upper half adjusted section relative relocation. */
720 HOWTO (R_PPC_SECTOFF_HA
, /* type */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
724 false, /* pc_relative */
726 complain_overflow_bitfield
, /* complain_on_overflow */
727 ppc_elf_addr16_ha_reloc
, /* special_function */
728 "R_PPC_SECTOFF_HA", /* name */
729 false, /* partial_inplace */
731 0xffff, /* dst_mask */
732 false), /* pcrel_offset */
734 /* The remaining relocs are from the Embedded ELF ABI, and are not
735 in the SVR4 ELF ABI. */
737 /* 32 bit value resulting from the addend minus the symbol */
738 HOWTO (R_PPC_EMB_NADDR32
, /* type */
740 2, /* size (0 = byte, 1 = short, 2 = long) */
742 false, /* pc_relative */
744 complain_overflow_bitfield
, /* complain_on_overflow */
745 bfd_elf_generic_reloc
, /* special_function */
746 "R_PPC_EMB_NADDR32", /* name */
747 false, /* partial_inplace */
749 0xffffffff, /* dst_mask */
750 false), /* pcrel_offset */
752 /* 16 bit value resulting from the addend minus the symbol */
753 HOWTO (R_PPC_EMB_NADDR16
, /* type */
755 1, /* size (0 = byte, 1 = short, 2 = long) */
757 false, /* pc_relative */
759 complain_overflow_bitfield
, /* complain_on_overflow */
760 bfd_elf_generic_reloc
, /* special_function */
761 "R_PPC_EMB_NADDR16", /* name */
762 false, /* partial_inplace */
764 0xffff, /* dst_mask */
765 false), /* pcrel_offset */
767 /* 16 bit value resulting from the addend minus the symbol */
768 HOWTO (R_PPC_EMB_NADDR16_LO
, /* type */
770 1, /* size (0 = byte, 1 = short, 2 = long) */
772 false, /* pc_relative */
774 complain_overflow_dont
,/* complain_on_overflow */
775 bfd_elf_generic_reloc
, /* special_function */
776 "R_PPC_EMB_ADDR16_LO", /* name */
777 false, /* partial_inplace */
779 0xffff, /* dst_mask */
780 false), /* pcrel_offset */
782 /* The high order 16 bits of the addend minus the symbol */
783 HOWTO (R_PPC_EMB_NADDR16_HI
, /* type */
785 1, /* size (0 = byte, 1 = short, 2 = long) */
787 false, /* pc_relative */
789 complain_overflow_dont
, /* complain_on_overflow */
790 bfd_elf_generic_reloc
, /* special_function */
791 "R_PPC_EMB_NADDR16_HI", /* name */
792 false, /* partial_inplace */
794 0xffff, /* dst_mask */
795 false), /* pcrel_offset */
797 /* The high order 16 bits of the result of the addend minus the address,
798 plus 1 if the contents of the low 16 bits, treated as a signed number,
800 HOWTO (R_PPC_EMB_NADDR16_HA
, /* type */
802 1, /* size (0 = byte, 1 = short, 2 = long) */
804 false, /* pc_relative */
806 complain_overflow_dont
, /* complain_on_overflow */
807 ppc_elf_addr16_ha_reloc
, /* special_function */
808 "R_PPC_EMB_NADDR16_HA", /* name */
809 false, /* partial_inplace */
811 0xffff, /* dst_mask */
812 false), /* pcrel_offset */
814 /* 16 bit value resulting from allocating a 4 byte word to hold an
815 address in the .sdata section, and returning the offset from
816 _SDA_BASE_ for that relocation */
817 HOWTO (R_PPC_EMB_SDAI16
, /* type */
819 1, /* size (0 = byte, 1 = short, 2 = long) */
821 false, /* pc_relative */
823 complain_overflow_bitfield
, /* complain_on_overflow */
824 bfd_elf_generic_reloc
, /* special_function */
825 "R_PPC_EMB_SDAI16", /* name */
826 false, /* partial_inplace */
828 0xffff, /* dst_mask */
829 false), /* pcrel_offset */
831 /* 16 bit value resulting from allocating a 4 byte word to hold an
832 address in the .sdata2 section, and returning the offset from
833 _SDA2_BASE_ for that relocation */
834 HOWTO (R_PPC_EMB_SDA2I16
, /* type */
836 1, /* size (0 = byte, 1 = short, 2 = long) */
838 false, /* pc_relative */
840 complain_overflow_bitfield
, /* complain_on_overflow */
841 bfd_elf_generic_reloc
, /* special_function */
842 "R_PPC_EMB_SDA2I16", /* name */
843 false, /* partial_inplace */
845 0xffff, /* dst_mask */
846 false), /* pcrel_offset */
848 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
850 HOWTO (R_PPC_EMB_SDA2REL
, /* type */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
854 false, /* pc_relative */
856 complain_overflow_signed
, /* complain_on_overflow */
857 bfd_elf_generic_reloc
, /* special_function */
858 "R_PPC_EMB_SDA2REL", /* name */
859 false, /* partial_inplace */
861 0xffff, /* dst_mask */
862 false), /* pcrel_offset */
864 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
865 signed offset from the appropriate base, and filling in the register
866 field with the appropriate register (0, 2, or 13). */
867 HOWTO (R_PPC_EMB_SDA21
, /* type */
869 2, /* size (0 = byte, 1 = short, 2 = long) */
871 false, /* pc_relative */
873 complain_overflow_signed
, /* complain_on_overflow */
874 bfd_elf_generic_reloc
, /* special_function */
875 "R_PPC_EMB_SDA21", /* name */
876 false, /* partial_inplace */
878 0xffff, /* dst_mask */
879 false), /* pcrel_offset */
881 /* Relocation not handled: R_PPC_EMB_MRKREF */
882 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
883 /* Relocation not handled: R_PPC_EMB_RELST_LO */
884 /* Relocation not handled: R_PPC_EMB_RELST_HI */
885 /* Relocation not handled: R_PPC_EMB_RELST_HA */
886 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
888 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
889 in the 16 bit signed offset from the appropriate base, and filling in the
890 register field with the appropriate register (0, 2, or 13). */
891 HOWTO (R_PPC_EMB_RELSDA
, /* type */
893 1, /* size (0 = byte, 1 = short, 2 = long) */
895 true, /* pc_relative */
897 complain_overflow_signed
, /* complain_on_overflow */
898 bfd_elf_generic_reloc
, /* special_function */
899 "R_PPC_EMB_RELSDA", /* name */
900 false, /* partial_inplace */
902 0xffff, /* dst_mask */
903 false), /* pcrel_offset */
905 /* GNU extension to record C++ vtable hierarchy */
906 HOWTO (R_PPC_GNU_VTINHERIT
, /* type */
908 0, /* size (0 = byte, 1 = short, 2 = long) */
910 false, /* pc_relative */
912 complain_overflow_dont
, /* complain_on_overflow */
913 NULL
, /* special_function */
914 "R_PPC_GNU_VTINHERIT", /* name */
915 false, /* partial_inplace */
918 false), /* pcrel_offset */
920 /* GNU extension to record C++ vtable member usage */
921 HOWTO (R_PPC_GNU_VTENTRY
, /* type */
923 0, /* size (0 = byte, 1 = short, 2 = long) */
925 false, /* pc_relative */
927 complain_overflow_dont
, /* complain_on_overflow */
928 NULL
, /* special_function */
929 "R_PPC_GNU_VTENTRY", /* name */
930 false, /* partial_inplace */
933 false), /* pcrel_offset */
935 /* Phony reloc to handle AIX style TOC entries */
936 HOWTO (R_PPC_TOC16
, /* type */
938 1, /* size (0 = byte, 1 = short, 2 = long) */
940 false, /* pc_relative */
942 complain_overflow_signed
, /* complain_on_overflow */
943 bfd_elf_generic_reloc
, /* special_function */
944 "R_PPC_TOC16", /* name */
945 false, /* partial_inplace */
947 0xffff, /* dst_mask */
948 false), /* pcrel_offset */
952 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
955 ppc_elf_howto_init ()
957 unsigned int i
, type
;
959 for (i
= 0; i
< sizeof (ppc_elf_howto_raw
) / sizeof (ppc_elf_howto_raw
[0]); i
++)
961 type
= ppc_elf_howto_raw
[i
].type
;
962 BFD_ASSERT (type
< sizeof (ppc_elf_howto_table
) / sizeof (ppc_elf_howto_table
[0]));
963 ppc_elf_howto_table
[type
] = &ppc_elf_howto_raw
[i
];
968 /* This function handles relaxing for the PPC with option --mpc860c0[=<n>].
970 The MPC860, revision C0 or earlier contains a bug in the die.
971 If all of the following conditions are true, the next instruction
972 to be executed *may* be treated as a no-op.
973 1/ A forward branch is executed.
974 2/ The branch is predicted as not taken.
975 3/ The branch is taken.
976 4/ The branch is located in the last 5 words of a page.
977 (The EOP limit is 5 by default but may be specified as any value from 1-10.)
979 Our software solution is to detect these problematic branches in a
980 linker pass and modify them as follows:
981 1/ Unconditional branches - Since these are always predicted taken,
982 there is no problem and no action is required.
983 2/ Conditional backward branches - No problem, no action required.
984 3/ Conditional forward branches - Ensure that the "inverse prediction
985 bit" is set (ensure it is predicted taken).
986 4/ Conditional register branches - Ensure that the "y bit" is set
987 (ensure it is predicted taken).
990 /* Sort sections by address. */
993 ppc_elf_sort_rela (arg1
, arg2
)
997 const Elf_Internal_Rela
**rela1
= (const Elf_Internal_Rela
**) arg1
;
998 const Elf_Internal_Rela
**rela2
= (const Elf_Internal_Rela
**) arg2
;
1000 /* Sort by offset. */
1001 return ((*rela1
)->r_offset
- (*rela2
)->r_offset
);
1005 ppc_elf_relax_section (abfd
, isec
, link_info
, again
)
1008 struct bfd_link_info
*link_info
;
1011 #define PAGESIZE 0x1000
1013 bfd_byte
*contents
= NULL
;
1014 bfd_byte
*free_contents
= NULL
;
1015 Elf_Internal_Rela
*internal_relocs
= NULL
;
1016 Elf_Internal_Rela
*free_relocs
= NULL
;
1017 Elf_Internal_Rela
**rela_comb
= NULL
;
1018 int comb_curr
, comb_count
;
1020 /* We never have to do this more than once per input section. */
1023 /* If needed, initialize this section's cooked size. */
1024 if (isec
->_cooked_size
== 0)
1025 isec
->_cooked_size
= isec
->_raw_size
;
1027 /* We're only interested in text sections which overlap the
1028 troublesome area at the end of a page. */
1029 if (link_info
->mpc860c0
&& (isec
->flags
& SEC_CODE
) && isec
->_cooked_size
)
1031 bfd_vma dot
, end_page
, end_section
;
1032 boolean section_modified
;
1034 /* Get the section contents. */
1035 /* Get cached copy if it exists. */
1036 if (elf_section_data (isec
)->this_hdr
.contents
!= NULL
)
1037 contents
= elf_section_data (isec
)->this_hdr
.contents
;
1040 /* Go get them off disk. */
1041 contents
= (bfd_byte
*) bfd_malloc (isec
->_raw_size
);
1042 if (contents
== NULL
)
1044 free_contents
= contents
;
1046 if (! bfd_get_section_contents (abfd
, isec
, contents
,
1047 (file_ptr
) 0, isec
->_raw_size
))
1053 if (isec
->reloc_count
)
1057 /* Get a copy of the native relocations. */
1058 internal_relocs
= _bfd_elf32_link_read_relocs (
1059 abfd
, isec
, (PTR
) NULL
, (Elf_Internal_Rela
*) NULL
,
1060 link_info
->keep_memory
);
1061 if (internal_relocs
== NULL
)
1063 if (! link_info
->keep_memory
)
1064 free_relocs
= internal_relocs
;
1066 /* Setup a faster access method for the reloc info we need. */
1067 rela_comb
= (Elf_Internal_Rela
**)
1068 bfd_malloc (isec
->reloc_count
*sizeof (Elf_Internal_Rela
*));
1069 if (rela_comb
== NULL
)
1071 for (n
=0; n
<isec
->reloc_count
; ++n
)
1075 r_type
= ELF32_R_TYPE (internal_relocs
[n
].r_info
);
1076 if (r_type
< 0 || r_type
>= (int)R_PPC_max
)
1079 /* Prologue constants are sometimes present in the ".text"
1080 sections and they can be identified by their associated relocation.
1081 We don't want to process those words and some others which
1082 can also be identified by their relocations. However, not all
1083 conditional branches will have a relocation so we will
1084 only ignore words that 1) have a reloc, and 2) the reloc
1085 is not applicable to a conditional branch.
1086 The array rela_comb is built here for use in the EOP scan loop. */
1089 case R_PPC_ADDR14_BRNTAKEN
: /* absolute, predicted not taken */
1090 case R_PPC_REL14
: /* relative cond. br. */
1091 case R_PPC_REL14_BRNTAKEN
: /* rel. cond. br., predicted not taken */
1092 /* We should check the instruction. */
1095 /* The word is not a conditional branch - ignore it. */
1096 rela_comb
[comb_count
++] = &internal_relocs
[n
];
1101 qsort (rela_comb
, (size_t) comb_count
, sizeof (int), ppc_elf_sort_rela
);
1104 /* Enumerate each EOP region that overlaps this section. */
1105 end_section
= isec
->vma
+ isec
->_cooked_size
;
1106 dot
= end_page
= (isec
->vma
| (PAGESIZE
- 1)) + 1;
1107 dot
-= link_info
->mpc860c0
;
1108 section_modified
= false;
1109 if (dot
< isec
->vma
) /* Increment the start position if this section */
1110 dot
= isec
->vma
; /* begins in the middle of its first EOP region. */
1113 dot
+= PAGESIZE
, end_page
+= PAGESIZE
)
1116 /* Check each word in this EOP region. */
1117 for (; dot
< end_page
; dot
+= 4)
1119 bfd_vma isec_offset
;
1121 boolean skip
, modified
;
1123 /* Don't process this word if there is a relocation for it and
1124 the relocation indicates the word is not a conditional branch. */
1126 isec_offset
= dot
- isec
->vma
;
1127 for (; comb_curr
<comb_count
; ++comb_curr
)
1131 r_offset
= rela_comb
[comb_curr
]->r_offset
;
1132 if (r_offset
>= isec_offset
)
1134 if (r_offset
== isec_offset
) skip
= true;
1140 /* Check the current word for a problematic conditional branch. */
1141 #define BO0(insn) ((insn) & 0x02000000)
1142 #define BO2(insn) ((insn) & 0x00800000)
1143 #define BO4(insn) ((insn) & 0x00200000)
1144 insn
= (unsigned long) bfd_get_32 (abfd
, contents
+ isec_offset
);
1146 if ((insn
& 0xFc000000) == 0x40000000)
1148 /* Instruction is BCx */
1149 if ((!BO0(insn
) || !BO2(insn
)) && !BO4(insn
))
1152 /* This branch is predicted as "normal".
1153 If this is a forward branch, it is problematic. */
1155 target
= insn
& 0x0000Fffc; /*extract*/
1156 target
= (target
^ 0x8000) - 0x8000; /*sign extend*/
1157 if ((insn
& 0x00000002) == 0)
1158 target
+= dot
; /*convert to abs*/
1161 insn
|= 0x00200000; /* set the prediction bit */
1166 else if ((insn
& 0xFc00Fffe) == 0x4c000420)
1168 /* Instruction is BCCTRx */
1169 if ((!BO0(insn
) || !BO2(insn
)) && !BO4(insn
))
1171 /* This branch is predicted as not-taken.
1172 If this is a forward branch, it is problematic.
1173 Since we can't tell statically if it will branch forward,
1174 always set the prediction bit. */
1175 insn
|= 0x00200000; /* set the prediction bit */
1179 else if ((insn
& 0xFc00Fffe) == 0x4c000020)
1181 /* Instruction is BCLRx */
1182 if ((!BO0(insn
) || !BO2(insn
)) && !BO4(insn
))
1184 /* This branch is predicted as not-taken.
1185 If this is a forward branch, it is problematic.
1186 Since we can't tell statically if it will branch forward,
1187 always set the prediction bit. */
1188 insn
|= 0x00200000; /* set the prediction bit */
1197 bfd_put_32 (abfd
, insn
, contents
+ isec_offset
);
1198 section_modified
= true;
1202 if (section_modified
)
1204 elf_section_data (isec
)->this_hdr
.contents
= contents
;
1205 free_contents
= NULL
;
1209 if (rela_comb
!= NULL
)
1215 if (free_relocs
!= NULL
)
1221 if (free_contents
!= NULL
)
1223 if (! link_info
->keep_memory
)
1224 free (free_contents
);
1227 /* Cache the section contents for elf_link_input_bfd. */
1228 elf_section_data (isec
)->this_hdr
.contents
= contents
;
1230 free_contents
= NULL
;
1236 if (rela_comb
!= NULL
)
1238 if (free_relocs
!= NULL
)
1240 if (free_contents
!= NULL
)
1241 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
]) /* Initialize howto table if needed */
1329 ppc_elf_howto_init ();
1331 BFD_ASSERT (ELF32_R_TYPE (dst
->r_info
) < (unsigned int) R_PPC_max
);
1332 cache_ptr
->howto
= ppc_elf_howto_table
[ELF32_R_TYPE (dst
->r_info
)];
1335 /* Handle the R_PPC_ADDR16_HA reloc. */
1337 static bfd_reloc_status_type
1338 ppc_elf_addr16_ha_reloc (abfd
, reloc_entry
, symbol
, data
, input_section
,
1339 output_bfd
, error_message
)
1340 bfd
*abfd ATTRIBUTE_UNUSED
;
1341 arelent
*reloc_entry
;
1343 PTR data ATTRIBUTE_UNUSED
;
1344 asection
*input_section
;
1346 char **error_message ATTRIBUTE_UNUSED
;
1350 if (output_bfd
!= NULL
)
1352 reloc_entry
->address
+= input_section
->output_offset
;
1353 return bfd_reloc_ok
;
1356 if (reloc_entry
->address
> input_section
->_cooked_size
)
1357 return bfd_reloc_outofrange
;
1359 if (bfd_is_com_section (symbol
->section
))
1362 relocation
= symbol
->value
;
1364 relocation
+= symbol
->section
->output_section
->vma
;
1365 relocation
+= symbol
->section
->output_offset
;
1366 relocation
+= reloc_entry
->addend
;
1368 reloc_entry
->addend
+= (relocation
& 0x8000) << 1;
1370 return bfd_reloc_continue
;
1373 /* Function to set whether a module needs the -mrelocatable bit set. */
1376 ppc_elf_set_private_flags (abfd
, flags
)
1380 BFD_ASSERT (!elf_flags_init (abfd
)
1381 || elf_elfheader (abfd
)->e_flags
== flags
);
1383 elf_elfheader (abfd
)->e_flags
= flags
;
1384 elf_flags_init (abfd
) = true;
1388 /* Copy backend specific data from one object module to another */
1390 ppc_elf_copy_private_bfd_data (ibfd
, obfd
)
1394 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1395 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1398 BFD_ASSERT (!elf_flags_init (obfd
)
1399 || elf_elfheader (obfd
)->e_flags
== elf_elfheader (ibfd
)->e_flags
);
1401 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
1402 elf_flags_init (obfd
) = true;
1406 /* Merge backend specific data from an object file to the output
1407 object file when linking */
1409 ppc_elf_merge_private_bfd_data (ibfd
, obfd
)
1417 /* Check if we have the same endianess */
1418 if (_bfd_generic_verify_endian_match (ibfd
, obfd
) == false)
1421 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1422 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1425 new_flags
= elf_elfheader (ibfd
)->e_flags
;
1426 old_flags
= elf_elfheader (obfd
)->e_flags
;
1427 if (!elf_flags_init (obfd
)) /* First call, no flags set */
1429 elf_flags_init (obfd
) = true;
1430 elf_elfheader (obfd
)->e_flags
= new_flags
;
1433 else if (new_flags
== old_flags
) /* Compatible flags are ok */
1436 else /* Incompatible flags */
1438 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib to be linked
1441 if ((new_flags
& EF_PPC_RELOCATABLE
) != 0
1442 && (old_flags
& (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
)) == 0)
1445 (*_bfd_error_handler
)
1446 (_("%s: compiled with -mrelocatable and linked with modules compiled normally"),
1447 bfd_get_filename (ibfd
));
1449 else if ((new_flags
& (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
)) == 0
1450 && (old_flags
& EF_PPC_RELOCATABLE
) != 0)
1453 (*_bfd_error_handler
)
1454 (_("%s: compiled normally and linked with modules compiled with -mrelocatable"),
1455 bfd_get_filename (ibfd
));
1458 /* The output is -mrelocatable-lib iff both the input files are. */
1459 if (! (new_flags
& EF_PPC_RELOCATABLE_LIB
))
1460 elf_elfheader (obfd
)->e_flags
&= ~EF_PPC_RELOCATABLE_LIB
;
1462 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
1463 but each input file is either -mrelocatable or -mrelocatable-lib. */
1464 if (! (elf_elfheader (obfd
)->e_flags
& EF_PPC_RELOCATABLE_LIB
)
1465 && (new_flags
& (EF_PPC_RELOCATABLE_LIB
| EF_PPC_RELOCATABLE
))
1466 && (old_flags
& (EF_PPC_RELOCATABLE_LIB
| EF_PPC_RELOCATABLE
)))
1467 elf_elfheader (obfd
)->e_flags
|= EF_PPC_RELOCATABLE
;
1469 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if any module uses it */
1470 elf_elfheader (obfd
)->e_flags
|= (new_flags
& EF_PPC_EMB
);
1472 new_flags
&= ~ (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
| EF_PPC_EMB
);
1473 old_flags
&= ~ (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
| EF_PPC_EMB
);
1475 /* Warn about any other mismatches */
1476 if (new_flags
!= old_flags
)
1479 (*_bfd_error_handler
)
1480 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
1481 bfd_get_filename (ibfd
), (long)new_flags
, (long)old_flags
);
1486 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
);
1523 /* Set up any other section flags and such that may be necessary. */
1526 ppc_elf_fake_sections (abfd
, shdr
, asect
)
1527 bfd
*abfd ATTRIBUTE_UNUSED
;
1528 Elf32_Internal_Shdr
*shdr
;
1531 if ((asect
->flags
& SEC_EXCLUDE
) != 0)
1532 shdr
->sh_flags
|= SHF_EXCLUDE
;
1534 if ((asect
->flags
& SEC_SORT_ENTRIES
) != 0)
1535 shdr
->sh_type
= SHT_ORDERED
;
1541 /* Create a special linker section */
1542 static elf_linker_section_t
*
1543 ppc_elf_create_linker_section (abfd
, info
, which
)
1545 struct bfd_link_info
*info
;
1546 enum elf_linker_section_enum which
;
1548 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
1549 elf_linker_section_t
*lsect
;
1551 /* Record the first bfd section that needs the special section */
1553 dynobj
= elf_hash_table (info
)->dynobj
= abfd
;
1555 /* If this is the first time, create the section */
1556 lsect
= elf_linker_section (dynobj
, which
);
1559 elf_linker_section_t defaults
;
1560 static elf_linker_section_t zero_section
;
1562 defaults
= zero_section
;
1563 defaults
.which
= which
;
1564 defaults
.hole_written_p
= false;
1565 defaults
.alignment
= 2;
1567 /* Both of these sections are (technically) created by the user
1568 putting data in them, so they shouldn't be marked
1571 The linker creates them so it has somewhere to attach their
1572 respective symbols. In fact, if they were empty it would
1573 be OK to leave the symbol set to 0 (or any random number), because
1574 the appropriate register should never be used. */
1575 defaults
.flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
1581 (*_bfd_error_handler
) (_("%s: Unknown special linker type %d"),
1582 bfd_get_filename (abfd
),
1585 bfd_set_error (bfd_error_bad_value
);
1586 return (elf_linker_section_t
*)0;
1588 case LINKER_SECTION_SDATA
: /* .sdata/.sbss section */
1589 defaults
.name
= ".sdata";
1590 defaults
.rel_name
= ".rela.sdata";
1591 defaults
.bss_name
= ".sbss";
1592 defaults
.sym_name
= "_SDA_BASE_";
1593 defaults
.sym_offset
= 32768;
1596 case LINKER_SECTION_SDATA2
: /* .sdata2/.sbss2 section */
1597 defaults
.name
= ".sdata2";
1598 defaults
.rel_name
= ".rela.sdata2";
1599 defaults
.bss_name
= ".sbss2";
1600 defaults
.sym_name
= "_SDA2_BASE_";
1601 defaults
.sym_offset
= 32768;
1602 defaults
.flags
|= SEC_READONLY
;
1606 lsect
= _bfd_elf_create_linker_section (abfd
, info
, which
, &defaults
);
1613 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we need to bump up
1614 the number of section headers. */
1617 ppc_elf_additional_program_headers (abfd
)
1625 s
= bfd_get_section_by_name (abfd
, ".interp");
1629 s
= bfd_get_section_by_name (abfd
, ".sbss2");
1630 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0 && s
->_raw_size
> 0)
1633 s
= bfd_get_section_by_name (abfd
, ".PPC.EMB.sbss0");
1634 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0 && s
->_raw_size
> 0)
1640 /* Modify the segment map if needed */
1643 ppc_elf_modify_segment_map (abfd
)
1644 bfd
*abfd ATTRIBUTE_UNUSED
;
1649 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
1650 to output sections (just like _bfd_elf_create_dynamic_sections has
1651 to create .dynbss and .rela.bss). */
1654 ppc_elf_create_dynamic_sections (abfd
, info
)
1656 struct bfd_link_info
*info
;
1658 register asection
*s
;
1661 if (!_bfd_elf_create_dynamic_sections(abfd
, info
))
1664 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1665 | SEC_LINKER_CREATED
);
1667 s
= bfd_make_section (abfd
, ".dynsbss");
1669 || ! bfd_set_section_flags (abfd
, s
, SEC_ALLOC
))
1674 s
= bfd_make_section (abfd
, ".rela.sbss");
1676 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
1677 || ! bfd_set_section_alignment (abfd
, s
, 2))
1683 /* Adjust a symbol defined by a dynamic object and referenced by a
1684 regular object. The current definition is in some section of the
1685 dynamic object, but we're not including those sections. We have to
1686 change the definition to something the rest of the link can
1690 ppc_elf_adjust_dynamic_symbol (info
, h
)
1691 struct bfd_link_info
*info
;
1692 struct elf_link_hash_entry
*h
;
1694 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
1696 unsigned int power_of_two
;
1700 fprintf (stderr
, "ppc_elf_adjust_dynamic_symbol called for %s\n", h
->root
.root
.string
);
1703 /* Make sure we know what is going on here. */
1704 BFD_ASSERT (dynobj
!= NULL
1705 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
)
1706 || h
->weakdef
!= NULL
1707 || ((h
->elf_link_hash_flags
1708 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0
1709 && (h
->elf_link_hash_flags
1710 & ELF_LINK_HASH_REF_REGULAR
) != 0
1711 && (h
->elf_link_hash_flags
1712 & ELF_LINK_HASH_DEF_REGULAR
) == 0)));
1714 /* If this is a function, put it in the procedure linkage table. We
1715 will fill in the contents of the procedure linkage table later,
1716 when we know the address of the .got section. */
1717 if (h
->type
== STT_FUNC
1718 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0)
1720 if (! elf_hash_table (info
)->dynamic_sections_created
1721 || SYMBOL_CALLS_LOCAL (info
, h
)
1722 || (info
->shared
&& h
->plt
.refcount
<= 0))
1724 /* A PLT entry is not required/allowed when:
1726 1. We are not using ld.so; because then the PLT entry
1727 can't be set up, so we can't use one.
1729 2. We know for certain that a call to this symbol
1730 will go to this object.
1732 3. GC has rendered the entry unused.
1733 Note, however, that in an executable all references to the
1734 symbol go to the PLT, so we can't turn it off in that case.
1735 ??? The correct thing to do here is to reference count
1736 all uses of the symbol, not just those to the GOT or PLT. */
1737 h
->plt
.offset
= (bfd_vma
) -1;
1738 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1742 /* Make sure this symbol is output as a dynamic symbol. */
1743 if (h
->dynindx
== -1)
1745 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
1748 BFD_ASSERT (h
->dynindx
!= -1);
1750 s
= bfd_get_section_by_name (dynobj
, ".plt");
1751 BFD_ASSERT (s
!= NULL
);
1753 /* If this is the first .plt entry, make room for the special
1755 if (s
->_raw_size
== 0)
1756 s
->_raw_size
+= PLT_INITIAL_ENTRY_SIZE
;
1758 /* The PowerPC PLT is actually composed of two parts, the first part
1759 is 2 words (for a load and a jump), and then there is a remaining
1760 word available at the end. */
1761 plt_offset
= (PLT_INITIAL_ENTRY_SIZE
1763 * ((s
->_raw_size
- PLT_INITIAL_ENTRY_SIZE
)
1764 / PLT_ENTRY_SIZE
)));
1766 /* If this symbol is not defined in a regular file, and we are
1767 not generating a shared library, then set the symbol to this
1768 location in the .plt. This is required to make function
1769 pointers compare as equal between the normal executable and
1770 the shared library. */
1772 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
1774 h
->root
.u
.def
.section
= s
;
1775 h
->root
.u
.def
.value
= plt_offset
;
1778 h
->plt
.offset
= plt_offset
;
1780 /* Make room for this entry. After the 8192nd entry, room
1781 for two entries is allocated. */
1782 if ((s
->_raw_size
- PLT_INITIAL_ENTRY_SIZE
) / PLT_ENTRY_SIZE
1783 >= PLT_NUM_SINGLE_ENTRIES
)
1784 s
->_raw_size
+= 2 * PLT_ENTRY_SIZE
;
1786 s
->_raw_size
+= PLT_ENTRY_SIZE
;
1788 /* We also need to make an entry in the .rela.plt section. */
1789 s
= bfd_get_section_by_name (dynobj
, ".rela.plt");
1790 BFD_ASSERT (s
!= NULL
);
1791 s
->_raw_size
+= sizeof (Elf32_External_Rela
);
1796 /* If this is a weak symbol, and there is a real definition, the
1797 processor independent code will have arranged for us to see the
1798 real definition first, and we can just use the same value. */
1799 if (h
->weakdef
!= NULL
)
1801 BFD_ASSERT (h
->weakdef
->root
.type
== bfd_link_hash_defined
1802 || h
->weakdef
->root
.type
== bfd_link_hash_defweak
);
1803 h
->root
.u
.def
.section
= h
->weakdef
->root
.u
.def
.section
;
1804 h
->root
.u
.def
.value
= h
->weakdef
->root
.u
.def
.value
;
1808 /* This is a reference to a symbol defined by a dynamic object which
1809 is not a function. */
1811 /* If we are creating a shared library, we must presume that the
1812 only references to the symbol are via the global offset table.
1813 For such cases we need not do anything here; the relocations will
1814 be handled correctly by relocate_section. */
1818 /* We must allocate the symbol in our .dynbss section, which will
1819 become part of the .bss section of the executable. There will be
1820 an entry for this symbol in the .dynsym section. The dynamic
1821 object will contain position independent code, so all references
1822 from the dynamic object to this symbol will go through the global
1823 offset table. The dynamic linker will use the .dynsym entry to
1824 determine the address it must put in the global offset table, so
1825 both the dynamic object and the regular object will refer to the
1826 same memory location for the variable.
1828 Of course, if the symbol is sufficiently small, we must instead
1829 allocate it in .sbss. FIXME: It would be better to do this if and
1830 only if there were actually SDAREL relocs for that symbol. */
1832 if (h
->size
<= elf_gp_size (dynobj
))
1833 s
= bfd_get_section_by_name (dynobj
, ".dynsbss");
1835 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
1836 BFD_ASSERT (s
!= NULL
);
1838 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
1839 copy the initial value out of the dynamic object and into the
1840 runtime process image. We need to remember the offset into the
1841 .rela.bss section we are going to use. */
1842 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1846 if (h
->size
<= elf_gp_size (dynobj
))
1847 srel
= bfd_get_section_by_name (dynobj
, ".rela.sbss");
1849 srel
= bfd_get_section_by_name (dynobj
, ".rela.bss");
1850 BFD_ASSERT (srel
!= NULL
);
1851 srel
->_raw_size
+= sizeof (Elf32_External_Rela
);
1852 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_COPY
;
1855 /* We need to figure out the alignment required for this symbol. I
1856 have no idea how ELF linkers handle this. */
1857 power_of_two
= bfd_log2 (h
->size
);
1858 if (power_of_two
> 4)
1861 /* Apply the required alignment. */
1862 s
->_raw_size
= BFD_ALIGN (s
->_raw_size
,
1863 (bfd_size_type
) (1 << power_of_two
));
1864 if (power_of_two
> bfd_get_section_alignment (dynobj
, s
))
1866 if (! bfd_set_section_alignment (dynobj
, s
, power_of_two
))
1870 /* Define the symbol as being at this point in the section. */
1871 h
->root
.u
.def
.section
= s
;
1872 h
->root
.u
.def
.value
= s
->_raw_size
;
1874 /* Increment the section size to make room for the symbol. */
1875 s
->_raw_size
+= h
->size
;
1881 /* Set the sizes of the dynamic sections. */
1884 ppc_elf_size_dynamic_sections (output_bfd
, info
)
1886 struct bfd_link_info
*info
;
1895 fprintf (stderr
, "ppc_elf_size_dynamic_sections called\n");
1898 dynobj
= elf_hash_table (info
)->dynobj
;
1899 BFD_ASSERT (dynobj
!= NULL
);
1901 if (elf_hash_table (info
)->dynamic_sections_created
)
1903 /* Set the contents of the .interp section to the interpreter. */
1906 s
= bfd_get_section_by_name (dynobj
, ".interp");
1907 BFD_ASSERT (s
!= NULL
);
1908 s
->_raw_size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1909 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1914 /* We may have created entries in the .rela.got, .rela.sdata, and
1915 .rela.sdata2 sections. However, if we are not creating the
1916 dynamic sections, we will not actually use these entries. Reset
1917 the size of .rela.got, et al, which will cause it to get
1918 stripped from the output file below. */
1919 static char *rela_sections
[] = { ".rela.got", ".rela.sdata",
1920 ".rela.sdata2", ".rela.sbss",
1924 for (p
= rela_sections
; *p
!= (char *)0; p
++)
1926 s
= bfd_get_section_by_name (dynobj
, *p
);
1932 /* The check_relocs and adjust_dynamic_symbol entry points have
1933 determined the sizes of the various dynamic sections. Allocate
1938 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1943 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1946 /* It's OK to base decisions on the section name, because none
1947 of the dynobj section names depend upon the input files. */
1948 name
= bfd_get_section_name (dynobj
, s
);
1952 if (strcmp (name
, ".plt") == 0)
1954 if (s
->_raw_size
== 0)
1956 /* Strip this section if we don't need it; see the
1962 /* Remember whether there is a PLT. */
1966 else if (strncmp (name
, ".rela", 5) == 0)
1968 if (s
->_raw_size
== 0)
1970 /* If we don't need this section, strip it from the
1971 output file. This is mostly to handle .rela.bss and
1972 .rela.plt. We must create both sections in
1973 create_dynamic_sections, because they must be created
1974 before the linker maps input sections to output
1975 sections. The linker does that before
1976 adjust_dynamic_symbol is called, and it is that
1977 function which decides whether anything needs to go
1978 into these sections. */
1984 const char *outname
;
1986 /* Remember whether there are any relocation sections. */
1989 /* If this relocation section applies to a read only
1990 section, then we probably need a DT_TEXTREL entry. */
1991 outname
= bfd_get_section_name (output_bfd
,
1993 target
= bfd_get_section_by_name (output_bfd
, outname
+ 5);
1995 && (target
->flags
& SEC_READONLY
) != 0
1996 && (target
->flags
& SEC_ALLOC
) != 0)
1999 /* We use the reloc_count field as a counter if we need
2000 to copy relocs into the output file. */
2004 else if (strcmp (name
, ".got") != 0
2005 && strcmp (name
, ".sdata") != 0
2006 && strcmp (name
, ".sdata2") != 0)
2008 /* It's not one of our sections, so don't allocate space. */
2014 _bfd_strip_section_from_output (info
, s
);
2018 /* Allocate memory for the section contents. */
2019 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->_raw_size
);
2020 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
2024 if (elf_hash_table (info
)->dynamic_sections_created
)
2026 /* Add some entries to the .dynamic section. We fill in the
2027 values later, in ppc_elf_finish_dynamic_sections, but we
2028 must add the entries now so that we get the correct size for
2029 the .dynamic section. The DT_DEBUG entry is filled in by the
2030 dynamic linker and used by the debugger. */
2033 if (! bfd_elf32_add_dynamic_entry (info
, DT_DEBUG
, 0))
2039 if (! bfd_elf32_add_dynamic_entry (info
, DT_PLTGOT
, 0)
2040 || ! bfd_elf32_add_dynamic_entry (info
, DT_PLTRELSZ
, 0)
2041 || ! bfd_elf32_add_dynamic_entry (info
, DT_PLTREL
, DT_RELA
)
2042 || ! bfd_elf32_add_dynamic_entry (info
, DT_JMPREL
, 0))
2048 if (! bfd_elf32_add_dynamic_entry (info
, DT_RELA
, 0)
2049 || ! bfd_elf32_add_dynamic_entry (info
, DT_RELASZ
, 0)
2050 || ! bfd_elf32_add_dynamic_entry (info
, DT_RELAENT
,
2051 sizeof (Elf32_External_Rela
)))
2057 if (! bfd_elf32_add_dynamic_entry (info
, DT_TEXTREL
, 0))
2059 info
->flags
|= DF_TEXTREL
;
2067 /* Look through the relocs for a section during the first phase, and
2068 allocate space in the global offset table or procedure linkage
2072 ppc_elf_check_relocs (abfd
, info
, sec
, relocs
)
2074 struct bfd_link_info
*info
;
2076 const Elf_Internal_Rela
*relocs
;
2079 Elf_Internal_Shdr
*symtab_hdr
;
2080 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
2081 const Elf_Internal_Rela
*rel
;
2082 const Elf_Internal_Rela
*rel_end
;
2083 bfd_signed_vma
*local_got_refcounts
;
2084 elf_linker_section_t
*sdata
;
2085 elf_linker_section_t
*sdata2
;
2087 asection
*sgot
= NULL
;
2088 asection
*srelgot
= NULL
;
2090 if (info
->relocateable
)
2094 fprintf (stderr
, "ppc_elf_check_relocs called for section %s in %s\n",
2095 bfd_get_section_name (abfd
, sec
),
2096 bfd_get_filename (abfd
));
2099 /* Create the linker generated sections all the time so that the
2100 special symbols are created. */
2102 if ((sdata
= elf_linker_section (abfd
, LINKER_SECTION_SDATA
)) == NULL
)
2104 sdata
= ppc_elf_create_linker_section (abfd
, info
, LINKER_SECTION_SDATA
);
2109 if ((sdata2
= elf_linker_section (abfd
, LINKER_SECTION_SDATA2
)) == NULL
)
2111 sdata2
= ppc_elf_create_linker_section (abfd
, info
, LINKER_SECTION_SDATA2
);
2116 dynobj
= elf_hash_table (info
)->dynobj
;
2117 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2118 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2120 sym_hashes
= elf_sym_hashes (abfd
);
2121 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof (Elf32_External_Sym
);
2122 if (!elf_bad_symtab (abfd
))
2123 sym_hashes_end
-= symtab_hdr
->sh_info
;
2127 rel_end
= relocs
+ sec
->reloc_count
;
2128 for (rel
= relocs
; rel
< rel_end
; rel
++)
2130 unsigned long r_symndx
;
2131 struct elf_link_hash_entry
*h
;
2133 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2134 if (r_symndx
< symtab_hdr
->sh_info
)
2137 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2139 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
2140 This shows up in particular in an R_PPC_ADDR32 in the eabi
2142 if (h
&& strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
2147 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
2148 if (! _bfd_elf_create_got_section (dynobj
, info
))
2150 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2151 BFD_ASSERT (sgot
!= NULL
);
2155 switch (ELF32_R_TYPE (rel
->r_info
))
2157 /* GOT16 relocations */
2159 case R_PPC_GOT16_LO
:
2160 case R_PPC_GOT16_HI
:
2161 case R_PPC_GOT16_HA
:
2162 /* This symbol requires a global offset table entry. */
2167 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
2168 if (! _bfd_elf_create_got_section (dynobj
, info
))
2170 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2171 BFD_ASSERT (sgot
!= NULL
);
2175 && (h
!= NULL
|| info
->shared
))
2177 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
2178 if (srelgot
== NULL
)
2180 srelgot
= bfd_make_section (dynobj
, ".rela.got");
2182 || ! bfd_set_section_flags (dynobj
, srelgot
,
2187 | SEC_LINKER_CREATED
2189 || ! bfd_set_section_alignment (dynobj
, srelgot
, 2))
2196 if (h
->got
.refcount
== -1)
2198 /* Make sure this symbol is output as a dynamic symbol. */
2199 if (h
->dynindx
== -1)
2200 if (!bfd_elf32_link_record_dynamic_symbol (info
, h
))
2203 /* Allocate space in the .got. */
2204 sgot
->_raw_size
+= 4;
2205 /* Allocate relocation space. */
2206 srelgot
->_raw_size
+= sizeof (Elf32_External_Rela
);
2208 h
->got
.refcount
= 1;
2215 /* This is a global offset table entry for a local symbol. */
2216 if (local_got_refcounts
== NULL
)
2220 size
= symtab_hdr
->sh_info
* sizeof (bfd_signed_vma
);
2221 local_got_refcounts
= (bfd_signed_vma
*)
2222 bfd_alloc (abfd
, size
);
2223 if (local_got_refcounts
== NULL
)
2225 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2226 memset (local_got_refcounts
, -1, size
);
2228 if (local_got_refcounts
[r_symndx
] == -1)
2230 sgot
->_raw_size
+= 4;
2232 /* If we are generating a shared object, we need to
2233 output a R_PPC_RELATIVE reloc so that the
2234 dynamic linker can adjust this GOT entry. */
2236 srelgot
->_raw_size
+= sizeof (Elf32_External_Rela
);
2238 local_got_refcounts
[r_symndx
] = 1;
2241 local_got_refcounts
[r_symndx
]++;
2245 /* Indirect .sdata relocation */
2246 case R_PPC_EMB_SDAI16
:
2249 ((*_bfd_error_handler
)
2250 (_("%s: relocation %s cannot be used when making a shared object"),
2251 bfd_get_filename (abfd
), "R_PPC_EMB_SDAI16"));
2255 if (srelgot
== NULL
&& (h
!= NULL
|| info
->shared
))
2257 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
2258 if (srelgot
== NULL
)
2260 srelgot
= bfd_make_section (dynobj
, ".rela.got");
2262 || ! bfd_set_section_flags (dynobj
, srelgot
,
2267 | SEC_LINKER_CREATED
2269 || ! bfd_set_section_alignment (dynobj
, srelgot
, 2))
2274 if (!bfd_elf32_create_pointer_linker_section (abfd
, info
, sdata
, h
, rel
))
2279 /* Indirect .sdata2 relocation */
2280 case R_PPC_EMB_SDA2I16
:
2283 ((*_bfd_error_handler
)
2284 (_("%s: relocation %s cannot be used when making a shared object"),
2285 bfd_get_filename (abfd
), "R_PPC_EMB_SDA2I16"));
2289 if (srelgot
== NULL
&& (h
!= NULL
|| info
->shared
))
2291 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
2292 if (srelgot
== NULL
)
2294 srelgot
= bfd_make_section (dynobj
, ".rela.got");
2296 || ! bfd_set_section_flags (dynobj
, srelgot
,
2301 | SEC_LINKER_CREATED
2303 || ! bfd_set_section_alignment (dynobj
, srelgot
, 2))
2308 if (!bfd_elf32_create_pointer_linker_section (abfd
, info
, sdata2
, h
, rel
))
2313 case R_PPC_SDAREL16
:
2314 case R_PPC_EMB_SDA2REL
:
2315 case R_PPC_EMB_SDA21
:
2318 ((*_bfd_error_handler
)
2319 (_("%s: relocation %s cannot be used when making a shared object"),
2320 bfd_get_filename (abfd
),
2321 ppc_elf_howto_table
[(int)ELF32_R_TYPE (rel
->r_info
)]->name
));
2327 case R_PPC_PLTREL24
:
2328 case R_PPC_PLT16_LO
:
2329 case R_PPC_PLT16_HI
:
2330 case R_PPC_PLT16_HA
:
2332 fprintf (stderr
, "Reloc requires a PLT entry\n");
2334 /* This symbol requires a procedure linkage table entry. We
2335 actually build the entry in adjust_dynamic_symbol,
2336 because this might be a case of linking PIC code without
2337 linking in any dynamic objects, in which case we don't
2338 need to generate a procedure linkage table after all. */
2342 /* It does not make sense to have a procedure linkage
2343 table entry for a local symbol. */
2344 bfd_set_error (bfd_error_bad_value
);
2348 /* Make sure this symbol is output as a dynamic symbol. */
2349 if (h
->dynindx
== -1)
2351 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
2354 if (h
->plt
.refcount
== -1)
2356 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
2357 h
->plt
.refcount
= 1;
2363 /* The following relocations don't need to propagate the
2364 relocation if linking a shared object since they are
2365 section relative. */
2367 case R_PPC_SECTOFF_LO
:
2368 case R_PPC_SECTOFF_HI
:
2369 case R_PPC_SECTOFF_HA
:
2372 /* This refers only to functions defined in the shared library */
2373 case R_PPC_LOCAL24PC
:
2376 /* This relocation describes the C++ object vtable hierarchy.
2377 Reconstruct it for later use during GC. */
2378 case R_PPC_GNU_VTINHERIT
:
2379 if (!_bfd_elf32_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2383 /* This relocation describes which C++ vtable entries are actually
2384 used. Record for later use during GC. */
2385 case R_PPC_GNU_VTENTRY
:
2386 if (!_bfd_elf32_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2390 /* When creating a shared object, we must copy these
2391 relocs into the output file. We create a reloc
2392 section in dynobj and make room for the reloc. */
2395 case R_PPC_REL14_BRTAKEN
:
2396 case R_PPC_REL14_BRNTAKEN
:
2399 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
2400 || SYMBOL_REFERENCES_LOCAL (info
, h
))
2408 fprintf (stderr
, "ppc_elf_check_relocs need to create relocation for %s\n",
2409 (h
&& h
->root
.root
.string
) ? h
->root
.root
.string
: "<unknown>");
2415 name
= (bfd_elf_string_from_elf_section
2417 elf_elfheader (abfd
)->e_shstrndx
,
2418 elf_section_data (sec
)->rel_hdr
.sh_name
));
2422 BFD_ASSERT (strncmp (name
, ".rela", 5) == 0
2423 && strcmp (bfd_get_section_name (abfd
, sec
),
2426 sreloc
= bfd_get_section_by_name (dynobj
, name
);
2431 sreloc
= bfd_make_section (dynobj
, name
);
2432 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
2433 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
2434 if ((sec
->flags
& SEC_ALLOC
) != 0)
2435 flags
|= SEC_ALLOC
| SEC_LOAD
;
2437 || ! bfd_set_section_flags (dynobj
, sreloc
, flags
)
2438 || ! bfd_set_section_alignment (dynobj
, sreloc
, 2))
2443 sreloc
->_raw_size
+= sizeof (Elf32_External_Rela
);
2445 /* FIXME: We should here do what the m68k and i386
2446 backends do: if the reloc is pc-relative, record it
2447 in case it turns out that the reloc is unnecessary
2448 because the symbol is forced local by versioning or
2449 we are linking with -Bdynamic. Fortunately this
2450 case is not frequent. */
2460 /* Return the section that should be marked against GC for a given
2464 ppc_elf_gc_mark_hook (abfd
, info
, rel
, h
, sym
)
2466 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2467 Elf_Internal_Rela
*rel
;
2468 struct elf_link_hash_entry
*h
;
2469 Elf_Internal_Sym
*sym
;
2473 switch (ELF32_R_TYPE (rel
->r_info
))
2475 case R_PPC_GNU_VTINHERIT
:
2476 case R_PPC_GNU_VTENTRY
:
2480 switch (h
->root
.type
)
2482 case bfd_link_hash_defined
:
2483 case bfd_link_hash_defweak
:
2484 return h
->root
.u
.def
.section
;
2486 case bfd_link_hash_common
:
2487 return h
->root
.u
.c
.p
->section
;
2496 if (!(elf_bad_symtab (abfd
)
2497 && ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
2498 && ! ((sym
->st_shndx
<= 0 || sym
->st_shndx
>= SHN_LORESERVE
)
2499 && sym
->st_shndx
!= SHN_COMMON
))
2501 return bfd_section_from_elf_index (abfd
, sym
->st_shndx
);
2508 /* Update the got entry reference counts for the section being removed. */
2511 ppc_elf_gc_sweep_hook (abfd
, info
, sec
, relocs
)
2513 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2515 const Elf_Internal_Rela
*relocs
;
2517 Elf_Internal_Shdr
*symtab_hdr
;
2518 struct elf_link_hash_entry
**sym_hashes
;
2519 bfd_signed_vma
*local_got_refcounts
;
2520 const Elf_Internal_Rela
*rel
, *relend
;
2521 unsigned long r_symndx
;
2522 struct elf_link_hash_entry
*h
;
2524 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2525 sym_hashes
= elf_sym_hashes (abfd
);
2526 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2528 relend
= relocs
+ sec
->reloc_count
;
2529 for (rel
= relocs
; rel
< relend
; rel
++)
2530 switch (ELF32_R_TYPE (rel
->r_info
))
2533 case R_PPC_GOT16_LO
:
2534 case R_PPC_GOT16_HI
:
2535 case R_PPC_GOT16_HA
:
2536 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2537 if (r_symndx
>= symtab_hdr
->sh_info
)
2539 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2540 if (h
->got
.refcount
> 0)
2543 else if (local_got_refcounts
!= NULL
)
2545 if (local_got_refcounts
[r_symndx
] > 0)
2546 local_got_refcounts
[r_symndx
]--;
2551 case R_PPC_PLTREL24
:
2552 case R_PPC_PLT16_LO
:
2553 case R_PPC_PLT16_HI
:
2554 case R_PPC_PLT16_HA
:
2555 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2556 if (r_symndx
>= symtab_hdr
->sh_info
)
2558 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2559 if (h
->plt
.refcount
> 0)
2571 /* Hook called by the linker routine which adds symbols from an object
2572 file. We use it to put .comm items in .sbss, and not .bss. */
2576 ppc_elf_add_symbol_hook (abfd
, info
, sym
, namep
, flagsp
, secp
, valp
)
2578 struct bfd_link_info
*info
;
2579 const Elf_Internal_Sym
*sym
;
2580 const char **namep ATTRIBUTE_UNUSED
;
2581 flagword
*flagsp ATTRIBUTE_UNUSED
;
2585 if (sym
->st_shndx
== SHN_COMMON
2586 && !info
->relocateable
2587 && sym
->st_size
<= (bfd_vma
) bfd_get_gp_size (abfd
))
2589 /* Common symbols less than or equal to -G nn bytes are automatically
2591 elf_linker_section_t
*sdata
2592 = ppc_elf_create_linker_section (abfd
, info
, LINKER_SECTION_SDATA
);
2594 if (!sdata
->bss_section
)
2596 /* We don't go through bfd_make_section, because we don't
2597 want to attach this common section to DYNOBJ. The linker
2598 will move the symbols to the appropriate output section
2599 when it defines common symbols. */
2600 sdata
->bss_section
= ((asection
*)
2601 bfd_zalloc (abfd
, sizeof (asection
)));
2602 if (sdata
->bss_section
== NULL
)
2604 sdata
->bss_section
->name
= sdata
->bss_name
;
2605 sdata
->bss_section
->flags
= SEC_IS_COMMON
;
2606 sdata
->bss_section
->output_section
= sdata
->bss_section
;
2607 sdata
->bss_section
->symbol
=
2608 (asymbol
*) bfd_zalloc (abfd
, sizeof (asymbol
));
2609 sdata
->bss_section
->symbol_ptr_ptr
=
2610 (asymbol
**) bfd_zalloc (abfd
, sizeof (asymbol
*));
2611 if (sdata
->bss_section
->symbol
== NULL
2612 || sdata
->bss_section
->symbol_ptr_ptr
== NULL
)
2614 sdata
->bss_section
->symbol
->name
= sdata
->bss_name
;
2615 sdata
->bss_section
->symbol
->flags
= BSF_SECTION_SYM
;
2616 sdata
->bss_section
->symbol
->section
= sdata
->bss_section
;
2617 *sdata
->bss_section
->symbol_ptr_ptr
= sdata
->bss_section
->symbol
;
2620 *secp
= sdata
->bss_section
;
2621 *valp
= sym
->st_size
;
2628 /* Finish up dynamic symbol handling. We set the contents of various
2629 dynamic sections here. */
2632 ppc_elf_finish_dynamic_symbol (output_bfd
, info
, h
, sym
)
2634 struct bfd_link_info
*info
;
2635 struct elf_link_hash_entry
*h
;
2636 Elf_Internal_Sym
*sym
;
2641 fprintf (stderr
, "ppc_elf_finish_dynamic_symbol called for %s",
2642 h
->root
.root
.string
);
2645 dynobj
= elf_hash_table (info
)->dynobj
;
2646 BFD_ASSERT (dynobj
!= NULL
);
2648 if (h
->plt
.offset
!= (bfd_vma
) -1)
2652 Elf_Internal_Rela rela
;
2653 bfd_vma reloc_index
;
2656 fprintf (stderr
, ", plt_offset = %d", h
->plt
.offset
);
2659 /* This symbol has an entry in the procedure linkage table. Set
2662 BFD_ASSERT (h
->dynindx
!= -1);
2664 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2665 srela
= bfd_get_section_by_name (dynobj
, ".rela.plt");
2666 BFD_ASSERT (splt
!= NULL
&& srela
!= NULL
);
2668 /* We don't need to fill in the .plt. The ppc dynamic linker
2671 /* Fill in the entry in the .rela.plt section. */
2672 rela
.r_offset
= (splt
->output_section
->vma
2673 + splt
->output_offset
2675 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_PPC_JMP_SLOT
);
2678 reloc_index
= (h
->plt
.offset
- PLT_INITIAL_ENTRY_SIZE
) / PLT_SLOT_SIZE
;
2679 if (reloc_index
> PLT_NUM_SINGLE_ENTRIES
)
2680 reloc_index
-= (reloc_index
- PLT_NUM_SINGLE_ENTRIES
) / 2;
2681 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
2682 ((Elf32_External_Rela
*) srela
->contents
2685 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2687 /* Mark the symbol as undefined, rather than as defined in
2688 the .plt section. Leave the value alone. */
2689 sym
->st_shndx
= SHN_UNDEF
;
2690 /* If the symbol is weak, we do need to clear the value.
2691 Otherwise, the PLT entry would provide a definition for
2692 the symbol even if the symbol wasn't defined anywhere,
2693 and so the symbol would never be NULL. */
2694 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR_NONWEAK
)
2700 if (h
->got
.offset
!= (bfd_vma
) -1)
2704 Elf_Internal_Rela rela
;
2706 /* This symbol has an entry in the global offset table. Set it
2709 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2710 srela
= bfd_get_section_by_name (dynobj
, ".rela.got");
2711 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
2713 rela
.r_offset
= (sgot
->output_section
->vma
2714 + sgot
->output_offset
2715 + (h
->got
.offset
&~ 1));
2717 /* If this is a -Bsymbolic link, and the symbol is defined
2718 locally, we just want to emit a RELATIVE reloc. The entry in
2719 the global offset table will already have been initialized in
2720 the relocate_section function. */
2722 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2724 rela
.r_info
= ELF32_R_INFO (0, R_PPC_RELATIVE
);
2725 rela
.r_addend
= (h
->root
.u
.def
.value
2726 + h
->root
.u
.def
.section
->output_section
->vma
2727 + h
->root
.u
.def
.section
->output_offset
);
2731 BFD_ASSERT((h
->got
.offset
& 1) == 0);
2732 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ h
->got
.offset
);
2733 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_PPC_GLOB_DAT
);
2737 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
2738 ((Elf32_External_Rela
*) srela
->contents
2739 + srela
->reloc_count
));
2740 ++srela
->reloc_count
;
2743 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_COPY
) != 0)
2746 Elf_Internal_Rela rela
;
2748 /* This symbols needs a copy reloc. Set it up. */
2751 fprintf (stderr
, ", copy");
2754 BFD_ASSERT (h
->dynindx
!= -1);
2756 if (h
->size
<= elf_gp_size (dynobj
))
2757 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
2760 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
2762 BFD_ASSERT (s
!= NULL
);
2764 rela
.r_offset
= (h
->root
.u
.def
.value
2765 + h
->root
.u
.def
.section
->output_section
->vma
2766 + h
->root
.u
.def
.section
->output_offset
);
2767 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_PPC_COPY
);
2769 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
2770 ((Elf32_External_Rela
*) s
->contents
2776 fprintf (stderr
, "\n");
2779 /* Mark some specially defined symbols as absolute. */
2780 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
2781 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
2782 || strcmp (h
->root
.root
.string
, "_PROCEDURE_LINKAGE_TABLE_") == 0)
2783 sym
->st_shndx
= SHN_ABS
;
2789 /* Finish up the dynamic sections. */
2792 ppc_elf_finish_dynamic_sections (output_bfd
, info
)
2794 struct bfd_link_info
*info
;
2797 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
2798 asection
*sgot
= bfd_get_section_by_name (dynobj
, ".got");
2801 fprintf (stderr
, "ppc_elf_finish_dynamic_sections called\n");
2804 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
2806 if (elf_hash_table (info
)->dynamic_sections_created
)
2809 Elf32_External_Dyn
*dyncon
, *dynconend
;
2811 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2812 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
2814 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
2815 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->_raw_size
);
2816 for (; dyncon
< dynconend
; dyncon
++)
2818 Elf_Internal_Dyn dyn
;
2822 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
2826 case DT_PLTGOT
: name
= ".plt"; size
= false; break;
2827 case DT_PLTRELSZ
: name
= ".rela.plt"; size
= true; break;
2828 case DT_JMPREL
: name
= ".rela.plt"; size
= false; break;
2829 default: name
= NULL
; size
= false; break;
2836 s
= bfd_get_section_by_name (output_bfd
, name
);
2842 dyn
.d_un
.d_ptr
= s
->vma
;
2845 if (s
->_cooked_size
!= 0)
2846 dyn
.d_un
.d_val
= s
->_cooked_size
;
2848 dyn
.d_un
.d_val
= s
->_raw_size
;
2851 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2856 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
2857 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
2860 unsigned char *contents
= sgot
->contents
;
2861 bfd_put_32 (output_bfd
, 0x4e800021 /* blrl */, contents
);
2864 bfd_put_32 (output_bfd
, (bfd_vma
) 0, contents
+4);
2866 bfd_put_32 (output_bfd
,
2867 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
2870 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
2877 /* The RELOCATE_SECTION function is called by the ELF backend linker
2878 to handle the relocations for a section.
2880 The relocs are always passed as Rela structures; if the section
2881 actually uses Rel structures, the r_addend field will always be
2884 This function is responsible for adjust the section contents as
2885 necessary, and (if using Rela relocs and generating a
2886 relocateable output file) adjusting the reloc addend as
2889 This function does not have to worry about setting the reloc
2890 address or the reloc symbol index.
2892 LOCAL_SYMS is a pointer to the swapped in local symbols.
2894 LOCAL_SECTIONS is an array giving the section in the input file
2895 corresponding to the st_shndx field of each local symbol.
2897 The global hash table entry for the global symbols can be found
2898 via elf_sym_hashes (input_bfd).
2900 When generating relocateable output, this function must handle
2901 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2902 going to be the section symbol corresponding to the output
2903 section, which means that the addend must be adjusted
2907 ppc_elf_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
2908 contents
, relocs
, local_syms
, local_sections
)
2910 struct bfd_link_info
*info
;
2912 asection
*input_section
;
2914 Elf_Internal_Rela
*relocs
;
2915 Elf_Internal_Sym
*local_syms
;
2916 asection
**local_sections
;
2918 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2919 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
2920 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
2921 elf_linker_section_t
*sdata
= (dynobj
) ? elf_linker_section (dynobj
, LINKER_SECTION_SDATA
) : NULL
;
2922 elf_linker_section_t
*sdata2
= (dynobj
) ? elf_linker_section (dynobj
, LINKER_SECTION_SDATA2
) : NULL
;
2923 Elf_Internal_Rela
*rel
= relocs
;
2924 Elf_Internal_Rela
*relend
= relocs
+ input_section
->reloc_count
;
2925 asection
*sreloc
= NULL
;
2928 bfd_vma
*local_got_offsets
;
2933 fprintf (stderr
, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n",
2934 bfd_get_filename (input_bfd
),
2935 bfd_section_name(input_bfd
, input_section
),
2936 (long)input_section
->reloc_count
,
2937 (info
->relocateable
) ? " (relocatable)" : "");
2940 if (!ppc_elf_howto_table
[ R_PPC_ADDR32
]) /* Initialize howto table if needed */
2941 ppc_elf_howto_init ();
2943 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2948 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2949 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2952 for (; rel
< relend
; rel
++)
2954 enum elf_ppc_reloc_type r_type
= (enum elf_ppc_reloc_type
)ELF32_R_TYPE (rel
->r_info
);
2955 bfd_vma offset
= rel
->r_offset
;
2956 bfd_vma addend
= rel
->r_addend
;
2957 bfd_reloc_status_type r
= bfd_reloc_other
;
2958 Elf_Internal_Sym
*sym
= (Elf_Internal_Sym
*)0;
2959 asection
*sec
= (asection
*)0;
2960 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*)0;
2961 const char *sym_name
= (const char *)0;
2962 reloc_howto_type
*howto
;
2963 unsigned long r_symndx
;
2965 int will_become_local
;
2967 /* Unknown relocation handling */
2968 if ((unsigned)r_type
>= (unsigned)R_PPC_max
|| !ppc_elf_howto_table
[(int)r_type
])
2970 (*_bfd_error_handler
) (_("%s: unknown relocation type %d"),
2971 bfd_get_filename (input_bfd
),
2974 bfd_set_error (bfd_error_bad_value
);
2979 howto
= ppc_elf_howto_table
[(int)r_type
];
2980 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2982 if (info
->relocateable
)
2984 /* This is a relocateable link. We don't have to change
2985 anything, unless the reloc is against a section symbol,
2986 in which case we have to adjust according to where the
2987 section symbol winds up in the output section. */
2988 if (r_symndx
< symtab_hdr
->sh_info
)
2990 sym
= local_syms
+ r_symndx
;
2991 if ((unsigned)ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
2993 sec
= local_sections
[r_symndx
];
2994 addend
= rel
->r_addend
+= sec
->output_offset
+ sym
->st_value
;
2999 fprintf (stderr
, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
3009 /* This is a final link. */
3010 if (r_symndx
< symtab_hdr
->sh_info
)
3012 sym
= local_syms
+ r_symndx
;
3013 sec
= local_sections
[r_symndx
];
3014 sym_name
= "<local symbol>";
3016 relocation
= (sec
->output_section
->vma
3017 + sec
->output_offset
3019 /* Relocs to local symbols are always resolved. */
3020 will_become_local
= 1;
3024 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3025 while (h
->root
.type
== bfd_link_hash_indirect
3026 || h
->root
.type
== bfd_link_hash_warning
)
3027 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3028 sym_name
= h
->root
.root
.string
;
3030 /* Can this relocation be resolved immediately? */
3031 will_become_local
= SYMBOL_REFERENCES_LOCAL (info
, h
);
3033 if (h
->root
.type
== bfd_link_hash_defined
3034 || h
->root
.type
== bfd_link_hash_defweak
)
3036 sec
= h
->root
.u
.def
.section
;
3037 if (((r_type
== R_PPC_PLT32
3038 || r_type
== R_PPC_PLTREL24
)
3040 && h
->plt
.offset
!= (bfd_vma
) -1)
3041 || (r_type
== R_PPC_LOCAL24PC
3042 && sec
->output_section
== NULL
)
3043 || ((r_type
== R_PPC_GOT16
3044 || r_type
== R_PPC_GOT16_LO
3045 || r_type
== R_PPC_GOT16_HI
3046 || r_type
== R_PPC_GOT16_HA
)
3047 && elf_hash_table (info
)->dynamic_sections_created
3048 && (! info
->shared
|| ! will_become_local
))
3050 && ! will_become_local
3051 && ((input_section
->flags
& SEC_ALLOC
) != 0
3052 /* Testing SEC_DEBUGGING here may be wrong.
3053 It's here to avoid a crash when
3054 generating a shared library with DWARF
3055 debugging information. */
3056 || ((input_section
->flags
& SEC_DEBUGGING
) != 0
3057 && (h
->elf_link_hash_flags
3058 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0))
3059 && (r_type
== R_PPC_ADDR32
3060 || r_type
== R_PPC_ADDR24
3061 || r_type
== R_PPC_ADDR16
3062 || r_type
== R_PPC_ADDR16_LO
3063 || r_type
== R_PPC_ADDR16_HI
3064 || r_type
== R_PPC_ADDR16_HA
3065 || r_type
== R_PPC_ADDR14
3066 || r_type
== R_PPC_ADDR14_BRTAKEN
3067 || r_type
== R_PPC_ADDR14_BRNTAKEN
3068 || r_type
== R_PPC_COPY
3069 || r_type
== R_PPC_GLOB_DAT
3070 || r_type
== R_PPC_JMP_SLOT
3071 || r_type
== R_PPC_UADDR32
3072 || r_type
== R_PPC_UADDR16
3073 || r_type
== R_PPC_SDAREL16
3074 || r_type
== R_PPC_EMB_NADDR32
3075 || r_type
== R_PPC_EMB_NADDR16
3076 || r_type
== R_PPC_EMB_NADDR16_LO
3077 || r_type
== R_PPC_EMB_NADDR16_HI
3078 || r_type
== R_PPC_EMB_NADDR16_HA
3079 || r_type
== R_PPC_EMB_SDAI16
3080 || r_type
== R_PPC_EMB_SDA2I16
3081 || r_type
== R_PPC_EMB_SDA2REL
3082 || r_type
== R_PPC_EMB_SDA21
3083 || r_type
== R_PPC_EMB_MRKREF
3084 || r_type
== R_PPC_EMB_BIT_FLD
3085 || r_type
== R_PPC_EMB_RELSDA
3086 || ((r_type
== R_PPC_REL24
3087 || r_type
== R_PPC_REL32
3088 || r_type
== R_PPC_REL14
3089 || r_type
== R_PPC_REL14_BRTAKEN
3090 || r_type
== R_PPC_REL14_BRNTAKEN
3091 || r_type
== R_PPC_RELATIVE
)
3092 && strcmp (h
->root
.root
.string
,
3093 "_GLOBAL_OFFSET_TABLE_") != 0))))
3095 /* In these cases, we don't need the relocation
3096 value. We check specially because in some
3097 obscure cases sec->output_section will be NULL. */
3100 else if (sec
->output_section
== NULL
)
3102 (*_bfd_error_handler
)
3103 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
3104 bfd_get_filename (input_bfd
), h
->root
.root
.string
,
3105 bfd_get_section_name (input_bfd
, input_section
));
3109 relocation
= (h
->root
.u
.def
.value
3110 + sec
->output_section
->vma
3111 + sec
->output_offset
);
3113 else if (h
->root
.type
== bfd_link_hash_undefweak
)
3115 else if (info
->shared
&& !info
->symbolic
&& !info
->no_undefined
3116 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
3120 if (! (*info
->callbacks
->undefined_symbol
) (info
,
3121 h
->root
.root
.string
,
3126 || info
->no_undefined
3127 || ELF_ST_VISIBILITY (h
->other
))))
3133 switch ((int)r_type
)
3136 (*_bfd_error_handler
) (_("%s: unknown relocation type %d for symbol %s"),
3137 bfd_get_filename (input_bfd
),
3138 (int)r_type
, sym_name
);
3140 bfd_set_error (bfd_error_bad_value
);
3144 /* Relocations that need no special processing. */
3145 case (int)R_PPC_LOCAL24PC
:
3146 /* It makes no sense to point a local relocation
3147 at a symbol not in this object. */
3149 && (h
->root
.type
== bfd_link_hash_defined
3150 || h
->root
.type
== bfd_link_hash_defweak
)
3151 && sec
->output_section
== NULL
)
3153 if (! (*info
->callbacks
->undefined_symbol
) (info
,
3154 h
->root
.root
.string
,
3164 /* Relocations that may need to be propagated if this is a shared
3166 case (int)R_PPC_REL24
:
3167 case (int)R_PPC_REL32
:
3168 case (int)R_PPC_REL14
:
3169 /* If these relocations are not to a named symbol, they can be
3170 handled right here, no need to bother the dynamic linker. */
3172 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
3173 || SYMBOL_REFERENCES_LOCAL (info
, h
))
3177 /* Relocations that always need to be propagated if this is a shared
3179 case (int)R_PPC_NONE
:
3180 case (int)R_PPC_ADDR32
:
3181 case (int)R_PPC_ADDR24
:
3182 case (int)R_PPC_ADDR16
:
3183 case (int)R_PPC_ADDR16_LO
:
3184 case (int)R_PPC_ADDR16_HI
:
3185 case (int)R_PPC_ADDR16_HA
:
3186 case (int)R_PPC_ADDR14
:
3187 case (int)R_PPC_UADDR32
:
3188 case (int)R_PPC_UADDR16
:
3191 Elf_Internal_Rela outrel
;
3195 fprintf (stderr
, "ppc_elf_relocate_section need to create relocation for %s\n",
3196 (h
&& h
->root
.root
.string
) ? h
->root
.root
.string
: "<unknown>");
3199 /* When generating a shared object, these relocations
3200 are copied into the output file to be resolved at run
3207 name
= (bfd_elf_string_from_elf_section
3209 elf_elfheader (input_bfd
)->e_shstrndx
,
3210 elf_section_data (input_section
)->rel_hdr
.sh_name
));
3214 BFD_ASSERT (strncmp (name
, ".rela", 5) == 0
3215 && strcmp (bfd_get_section_name (input_bfd
,
3219 sreloc
= bfd_get_section_by_name (dynobj
, name
);
3220 BFD_ASSERT (sreloc
!= NULL
);
3225 if (elf_section_data (input_section
)->stab_info
== NULL
)
3226 outrel
.r_offset
= rel
->r_offset
;
3231 off
= (_bfd_stab_section_offset
3232 (output_bfd
, &elf_hash_table (info
)->stab_info
,
3234 &elf_section_data (input_section
)->stab_info
,
3236 if (off
== (bfd_vma
) -1)
3238 outrel
.r_offset
= off
;
3241 outrel
.r_offset
+= (input_section
->output_section
->vma
3242 + input_section
->output_offset
);
3245 memset (&outrel
, 0, sizeof outrel
);
3246 /* h->dynindx may be -1 if this symbol was marked to
3248 else if (! will_become_local
)
3250 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3251 outrel
.r_addend
= rel
->r_addend
;
3255 if (r_type
== R_PPC_ADDR32
)
3257 outrel
.r_info
= ELF32_R_INFO (0, R_PPC_RELATIVE
);
3258 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3265 sec
= local_sections
[r_symndx
];
3268 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
3270 == bfd_link_hash_defweak
));
3271 sec
= h
->root
.u
.def
.section
;
3273 if (sec
!= NULL
&& bfd_is_abs_section (sec
))
3275 else if (sec
== NULL
|| sec
->owner
== NULL
)
3277 bfd_set_error (bfd_error_bad_value
);
3284 osec
= sec
->output_section
;
3285 indx
= elf_section_data (osec
)->dynindx
;
3286 BFD_ASSERT(indx
> 0);
3290 printf ("indx=%d section=%s flags=%08x name=%s\n",
3291 indx
, osec
->name
, osec
->flags
,
3292 h
->root
.root
.string
);
3297 outrel
.r_info
= ELF32_R_INFO (indx
, r_type
);
3298 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3302 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,
3303 (((Elf32_External_Rela
*)
3305 + sreloc
->reloc_count
));
3306 ++sreloc
->reloc_count
;
3308 /* This reloc will be computed at runtime, so there's no
3309 need to do anything now, unless this is a RELATIVE
3310 reloc in an unallocated section. */
3312 || (input_section
->flags
& SEC_ALLOC
) != 0
3313 || ELF32_R_TYPE (outrel
.r_info
) != R_PPC_RELATIVE
)
3317 /* Arithmetic adjust relocations that aren't going into a
3319 if (r_type
== R_PPC_ADDR16_HA
3320 /* It's just possible that this symbol is a weak symbol
3321 that's not actually defined anywhere. In that case,
3322 'sec' would be NULL, and we should leave the symbol
3323 alone (it will be set to zero elsewhere in the link). */
3326 addend
+= ((relocation
+ addend
) & 0x8000) << 1;
3330 /* branch taken prediction relocations */
3331 case (int)R_PPC_ADDR14_BRTAKEN
:
3332 case (int)R_PPC_REL14_BRTAKEN
:
3333 insn
= bfd_get_32 (output_bfd
, contents
+ offset
);
3334 if ((relocation
- offset
) & 0x8000)
3335 insn
&= ~BRANCH_PREDICT_BIT
;
3337 insn
|= BRANCH_PREDICT_BIT
;
3338 bfd_put_32 (output_bfd
, insn
, contents
+ offset
);
3341 /* branch not taken predicition relocations */
3342 case (int)R_PPC_ADDR14_BRNTAKEN
:
3343 case (int)R_PPC_REL14_BRNTAKEN
:
3344 insn
= bfd_get_32 (output_bfd
, contents
+ offset
);
3345 if ((relocation
- offset
) & 0x8000)
3346 insn
|= BRANCH_PREDICT_BIT
;
3348 insn
&= ~BRANCH_PREDICT_BIT
;
3349 bfd_put_32 (output_bfd
, insn
, contents
+ offset
);
3352 /* GOT16 relocations */
3353 case (int)R_PPC_GOT16
:
3354 case (int)R_PPC_GOT16_LO
:
3355 case (int)R_PPC_GOT16_HI
:
3356 case (int)R_PPC_GOT16_HA
:
3357 /* Relocation is to the entry for this symbol in the global
3359 BFD_ASSERT (sgot
!= NULL
);
3365 off
= h
->got
.offset
;
3366 BFD_ASSERT (off
!= (bfd_vma
) -1);
3368 if (! elf_hash_table (info
)->dynamic_sections_created
3370 && SYMBOL_REFERENCES_LOCAL (info
, h
)))
3372 /* This is actually a static link, or it is a
3373 -Bsymbolic link and the symbol is defined
3374 locally. We must initialize this entry in the
3375 global offset table. Since the offset must
3376 always be a multiple of 4, we use the least
3377 significant bit to record whether we have
3378 initialized it already.
3380 When doing a dynamic link, we create a .rela.got
3381 relocation entry to initialize the value. This
3382 is done in the finish_dynamic_symbol routine. */
3387 bfd_put_32 (output_bfd
, relocation
,
3388 sgot
->contents
+ off
);
3393 relocation
= sgot
->output_offset
+ off
- 4;
3399 BFD_ASSERT (local_got_offsets
!= NULL
3400 && local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
3402 off
= local_got_offsets
[r_symndx
];
3404 /* The offset must always be a multiple of 4. We use
3405 the least significant bit to record whether we have
3406 already processed this entry. */
3411 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
3416 Elf_Internal_Rela outrel
;
3418 /* We need to generate a R_PPC_RELATIVE reloc
3419 for the dynamic linker. */
3420 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
3421 BFD_ASSERT (srelgot
!= NULL
);
3423 outrel
.r_offset
= (sgot
->output_section
->vma
3424 + sgot
->output_offset
3426 outrel
.r_info
= ELF32_R_INFO (0, R_PPC_RELATIVE
);
3427 outrel
.r_addend
= relocation
;
3428 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,
3429 (((Elf32_External_Rela
*)
3431 + srelgot
->reloc_count
));
3432 ++srelgot
->reloc_count
;
3435 local_got_offsets
[r_symndx
] |= 1;
3438 relocation
= sgot
->output_offset
+ off
- 4;
3442 /* Indirect .sdata relocation */
3443 case (int)R_PPC_EMB_SDAI16
:
3444 BFD_ASSERT (sdata
!= NULL
);
3445 relocation
= bfd_elf32_finish_pointer_linker_section (output_bfd
, input_bfd
, info
,
3446 sdata
, h
, relocation
, rel
,
3450 /* Indirect .sdata2 relocation */
3451 case (int)R_PPC_EMB_SDA2I16
:
3452 BFD_ASSERT (sdata2
!= NULL
);
3453 relocation
= bfd_elf32_finish_pointer_linker_section (output_bfd
, input_bfd
, info
,
3454 sdata2
, h
, relocation
, rel
,
3458 /* Handle the TOC16 reloc. We want to use the offset within the .got
3459 section, not the actual VMA. This is appropriate when generating
3460 an embedded ELF object, for which the .got section acts like the
3461 AIX .toc section. */
3462 case (int)R_PPC_TOC16
: /* phony GOT16 relocations */
3463 BFD_ASSERT (sec
!= (asection
*)0);
3464 BFD_ASSERT (bfd_is_und_section (sec
)
3465 || strcmp (bfd_get_section_name (abfd
, sec
), ".got") == 0
3466 || strcmp (bfd_get_section_name (abfd
, sec
), ".cgot") == 0)
3468 addend
-= sec
->output_section
->vma
+ sec
->output_offset
+ 0x8000;
3471 case (int)R_PPC_PLTREL24
:
3472 /* Relocation is to the entry for this symbol in the
3473 procedure linkage table. */
3474 BFD_ASSERT (h
!= NULL
);
3476 if (h
->plt
.offset
== (bfd_vma
) -1
3479 /* We didn't make a PLT entry for this symbol. This
3480 happens when statically linking PIC code, or when
3481 using -Bsymbolic. */
3485 relocation
= (splt
->output_section
->vma
3486 + splt
->output_offset
3490 /* relocate against _SDA_BASE_ */
3491 case (int)R_PPC_SDAREL16
:
3495 BFD_ASSERT (sec
!= (asection
*)0);
3496 name
= bfd_get_section_name (abfd
, sec
->output_section
);
3497 if (strcmp (name
, ".sdata") != 0
3498 && strcmp (name
, ".sbss") != 0)
3500 (*_bfd_error_handler
) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3501 bfd_get_filename (input_bfd
),
3503 ppc_elf_howto_table
[ (int)r_type
]->name
,
3506 addend
-= (sdata
->sym_hash
->root
.u
.def
.value
3507 + sdata
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3508 + sdata
->sym_hash
->root
.u
.def
.section
->output_offset
);
3512 /* relocate against _SDA2_BASE_ */
3513 case (int)R_PPC_EMB_SDA2REL
:
3517 BFD_ASSERT (sec
!= (asection
*)0);
3518 name
= bfd_get_section_name (abfd
, sec
->output_section
);
3519 if (strcmp (name
, ".sdata2") != 0 && strcmp (name
, ".sbss2") != 0)
3521 (*_bfd_error_handler
) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3522 bfd_get_filename (input_bfd
),
3524 ppc_elf_howto_table
[ (int)r_type
]->name
,
3527 bfd_set_error (bfd_error_bad_value
);
3531 addend
-= (sdata2
->sym_hash
->root
.u
.def
.value
3532 + sdata2
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3533 + sdata2
->sym_hash
->root
.u
.def
.section
->output_offset
);
3537 /* relocate against either _SDA_BASE_, _SDA2_BASE_, or 0 */
3538 case (int)R_PPC_EMB_SDA21
:
3539 case (int)R_PPC_EMB_RELSDA
:
3544 BFD_ASSERT (sec
!= (asection
*)0);
3545 name
= bfd_get_section_name (abfd
, sec
->output_section
);
3546 if (strcmp (name
, ".sdata") == 0 || strcmp (name
, ".sbss") == 0)
3549 addend
-= (sdata
->sym_hash
->root
.u
.def
.value
3550 + sdata
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3551 + sdata
->sym_hash
->root
.u
.def
.section
->output_offset
);
3554 else if (strcmp (name
, ".sdata2") == 0 || strcmp (name
, ".sbss2") == 0)
3557 addend
-= (sdata2
->sym_hash
->root
.u
.def
.value
3558 + sdata2
->sym_hash
->root
.u
.def
.section
->output_section
->vma
3559 + sdata2
->sym_hash
->root
.u
.def
.section
->output_offset
);
3562 else if (strcmp (name
, ".PPC.EMB.sdata0") == 0 || strcmp (name
, ".PPC.EMB.sbss0") == 0)
3569 (*_bfd_error_handler
) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"),
3570 bfd_get_filename (input_bfd
),
3572 ppc_elf_howto_table
[ (int)r_type
]->name
,
3575 bfd_set_error (bfd_error_bad_value
);
3580 if (r_type
== R_PPC_EMB_SDA21
)
3581 { /* fill in register field */
3582 insn
= bfd_get_32 (output_bfd
, contents
+ offset
);
3583 insn
= (insn
& ~RA_REGISTER_MASK
) | (reg
<< RA_REGISTER_SHIFT
);
3584 bfd_put_32 (output_bfd
, insn
, contents
+ offset
);
3589 /* Relocate against the beginning of the section */
3590 case (int)R_PPC_SECTOFF
:
3591 case (int)R_PPC_SECTOFF_LO
:
3592 case (int)R_PPC_SECTOFF_HI
:
3593 BFD_ASSERT (sec
!= (asection
*)0);
3594 addend
-= sec
->output_section
->vma
;
3597 case (int)R_PPC_SECTOFF_HA
:
3598 BFD_ASSERT (sec
!= (asection
*)0);
3599 addend
-= sec
->output_section
->vma
;
3600 addend
+= ((relocation
+ addend
) & 0x8000) << 1;
3603 /* Negative relocations */
3604 case (int)R_PPC_EMB_NADDR32
:
3605 case (int)R_PPC_EMB_NADDR16
:
3606 case (int)R_PPC_EMB_NADDR16_LO
:
3607 case (int)R_PPC_EMB_NADDR16_HI
:
3608 addend
-= 2*relocation
;
3611 case (int)R_PPC_EMB_NADDR16_HA
:
3612 addend
-= 2*relocation
;
3613 addend
+= ((relocation
+ addend
) & 0x8000) << 1;
3616 /* NOP relocation that prevents garbage collecting linkers from omitting a
3618 case (int)R_PPC_EMB_MRKREF
:
3621 case (int)R_PPC_COPY
:
3622 case (int)R_PPC_GLOB_DAT
:
3623 case (int)R_PPC_JMP_SLOT
:
3624 case (int)R_PPC_RELATIVE
:
3625 case (int)R_PPC_PLT32
:
3626 case (int)R_PPC_PLTREL32
:
3627 case (int)R_PPC_PLT16_LO
:
3628 case (int)R_PPC_PLT16_HI
:
3629 case (int)R_PPC_PLT16_HA
:
3630 case (int)R_PPC_EMB_RELSEC16
:
3631 case (int)R_PPC_EMB_RELST_LO
:
3632 case (int)R_PPC_EMB_RELST_HI
:
3633 case (int)R_PPC_EMB_RELST_HA
:
3634 case (int)R_PPC_EMB_BIT_FLD
:
3635 (*_bfd_error_handler
) (_("%s: Relocation %s is not yet supported for symbol %s."),
3636 bfd_get_filename (input_bfd
),
3637 ppc_elf_howto_table
[ (int)r_type
]->name
,
3640 bfd_set_error (bfd_error_invalid_operation
);
3644 case (int)R_PPC_GNU_VTINHERIT
:
3645 case (int)R_PPC_GNU_VTENTRY
:
3646 /* These are no-ops in the end. */
3651 fprintf (stderr
, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n",
3660 r
= _bfd_final_link_relocate (howto
,
3668 if (r
== bfd_reloc_ok
)
3670 else if (r
== bfd_reloc_overflow
)
3676 if (h
->root
.type
== bfd_link_hash_undefweak
3677 && howto
->pc_relative
)
3679 /* Assume this is a call protected by other code that
3680 detect the symbol is undefined. If this is the case,
3681 we can safely ignore the overflow. If not, the
3682 program is hosed anyway, and a little warning isn't
3688 name
= h
->root
.root
.string
;
3692 name
= bfd_elf_string_from_elf_section (input_bfd
,
3693 symtab_hdr
->sh_link
,
3698 name
= bfd_section_name (input_bfd
, sec
);
3701 if (! (*info
->callbacks
->reloc_overflow
) (info
,
3715 fprintf (stderr
, "\n");
3722 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
3723 #define TARGET_LITTLE_NAME "elf32-powerpcle"
3724 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
3725 #define TARGET_BIG_NAME "elf32-powerpc"
3726 #define ELF_ARCH bfd_arch_powerpc
3727 #define ELF_MACHINE_CODE EM_PPC
3728 #define ELF_MAXPAGESIZE 0x10000
3729 #define elf_info_to_howto ppc_elf_info_to_howto
3731 #ifdef EM_CYGNUS_POWERPC
3732 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
3736 #define ELF_MACHINE_ALT2 EM_PPC_OLD
3739 #define elf_backend_plt_not_loaded 1
3740 #define elf_backend_got_symbol_offset 4
3741 #define elf_backend_can_gc_sections 1
3742 #define elf_backend_got_header_size 12
3743 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
3745 #define bfd_elf32_bfd_copy_private_bfd_data ppc_elf_copy_private_bfd_data
3746 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
3747 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
3748 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
3749 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
3750 #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
3752 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
3753 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
3754 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
3755 #define elf_backend_relocate_section ppc_elf_relocate_section
3756 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
3757 #define elf_backend_check_relocs ppc_elf_check_relocs
3758 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
3759 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
3760 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
3761 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
3762 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
3763 #define elf_backend_fake_sections ppc_elf_fake_sections
3764 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
3765 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
3767 #include "elf32-target.h"