1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
34 #include "elf32-ppc.h"
36 /* RELA relocations are used here. */
38 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc_elf_unhandled_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 /* Branch prediction bit for branch taken relocs. */
44 #define BRANCH_PREDICT_BIT 0x200000
45 /* Mask to set RA in memory instructions. */
46 #define RA_REGISTER_MASK 0x001f0000
47 /* Value to shift register by to insert RA. */
48 #define RA_REGISTER_SHIFT 16
50 /* The name of the dynamic interpreter. This is put in the .interp
52 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
54 /* The size in bytes of an entry in the procedure linkage table. */
55 #define PLT_ENTRY_SIZE 12
56 /* The initial size of the plt reserved for the dynamic linker. */
57 #define PLT_INITIAL_ENTRY_SIZE 72
58 /* The size of the gap between entries in the PLT. */
59 #define PLT_SLOT_SIZE 8
60 /* The number of single-slot PLT entries (the rest use two slots). */
61 #define PLT_NUM_SINGLE_ENTRIES 8192
63 /* Some nop instructions. */
64 #define NOP 0x60000000
65 #define CROR_151515 0x4def7b82
66 #define CROR_313131 0x4ffffb82
68 /* Offset of tp and dtp pointers from start of TLS block. */
69 #define TP_OFFSET 0x7000
70 #define DTP_OFFSET 0x8000
72 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
74 static reloc_howto_type ppc_elf_howto_raw[] = {
75 /* This reloc does nothing. */
76 HOWTO (R_PPC_NONE, /* type */
78 2, /* size (0 = byte, 1 = short, 2 = long) */
80 FALSE, /* pc_relative */
82 complain_overflow_bitfield, /* complain_on_overflow */
83 bfd_elf_generic_reloc, /* special_function */
84 "R_PPC_NONE", /* name */
85 FALSE, /* partial_inplace */
88 FALSE), /* pcrel_offset */
90 /* A standard 32 bit relocation. */
91 HOWTO (R_PPC_ADDR32, /* type */
93 2, /* size (0 = byte, 1 = short, 2 = long) */
95 FALSE, /* pc_relative */
97 complain_overflow_bitfield, /* complain_on_overflow */
98 bfd_elf_generic_reloc, /* special_function */
99 "R_PPC_ADDR32", /* name */
100 FALSE, /* partial_inplace */
102 0xffffffff, /* dst_mask */
103 FALSE), /* pcrel_offset */
105 /* An absolute 26 bit branch; the lower two bits must be zero.
106 FIXME: we don't check that, we just clear them. */
107 HOWTO (R_PPC_ADDR24, /* type */
109 2, /* size (0 = byte, 1 = short, 2 = long) */
111 FALSE, /* pc_relative */
113 complain_overflow_bitfield, /* complain_on_overflow */
114 bfd_elf_generic_reloc, /* special_function */
115 "R_PPC_ADDR24", /* name */
116 FALSE, /* partial_inplace */
118 0x3fffffc, /* dst_mask */
119 FALSE), /* pcrel_offset */
121 /* A standard 16 bit relocation. */
122 HOWTO (R_PPC_ADDR16, /* type */
124 1, /* size (0 = byte, 1 = short, 2 = long) */
126 FALSE, /* pc_relative */
128 complain_overflow_bitfield, /* complain_on_overflow */
129 bfd_elf_generic_reloc, /* special_function */
130 "R_PPC_ADDR16", /* name */
131 FALSE, /* partial_inplace */
133 0xffff, /* dst_mask */
134 FALSE), /* pcrel_offset */
136 /* A 16 bit relocation without overflow. */
137 HOWTO (R_PPC_ADDR16_LO, /* type */
139 1, /* size (0 = byte, 1 = short, 2 = long) */
141 FALSE, /* pc_relative */
143 complain_overflow_dont,/* complain_on_overflow */
144 bfd_elf_generic_reloc, /* special_function */
145 "R_PPC_ADDR16_LO", /* name */
146 FALSE, /* partial_inplace */
148 0xffff, /* dst_mask */
149 FALSE), /* pcrel_offset */
151 /* The high order 16 bits of an address. */
152 HOWTO (R_PPC_ADDR16_HI, /* type */
154 1, /* size (0 = byte, 1 = short, 2 = long) */
156 FALSE, /* pc_relative */
158 complain_overflow_dont, /* complain_on_overflow */
159 bfd_elf_generic_reloc, /* special_function */
160 "R_PPC_ADDR16_HI", /* name */
161 FALSE, /* partial_inplace */
163 0xffff, /* dst_mask */
164 FALSE), /* pcrel_offset */
166 /* The high order 16 bits of an address, plus 1 if the contents of
167 the low 16 bits, treated as a signed number, is negative. */
168 HOWTO (R_PPC_ADDR16_HA, /* type */
170 1, /* size (0 = byte, 1 = short, 2 = long) */
172 FALSE, /* pc_relative */
174 complain_overflow_dont, /* complain_on_overflow */
175 ppc_elf_addr16_ha_reloc, /* special_function */
176 "R_PPC_ADDR16_HA", /* name */
177 FALSE, /* partial_inplace */
179 0xffff, /* dst_mask */
180 FALSE), /* pcrel_offset */
182 /* An absolute 16 bit branch; the lower two bits must be zero.
183 FIXME: we don't check that, we just clear them. */
184 HOWTO (R_PPC_ADDR14, /* type */
186 2, /* size (0 = byte, 1 = short, 2 = long) */
188 FALSE, /* pc_relative */
190 complain_overflow_bitfield, /* complain_on_overflow */
191 bfd_elf_generic_reloc, /* special_function */
192 "R_PPC_ADDR14", /* name */
193 FALSE, /* partial_inplace */
195 0xfffc, /* dst_mask */
196 FALSE), /* pcrel_offset */
198 /* An absolute 16 bit branch, for which bit 10 should be set to
199 indicate that the branch is expected to be taken. The lower two
200 bits must be zero. */
201 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
203 2, /* size (0 = byte, 1 = short, 2 = long) */
205 FALSE, /* pc_relative */
207 complain_overflow_bitfield, /* complain_on_overflow */
208 bfd_elf_generic_reloc, /* special_function */
209 "R_PPC_ADDR14_BRTAKEN",/* name */
210 FALSE, /* partial_inplace */
212 0xfffc, /* dst_mask */
213 FALSE), /* pcrel_offset */
215 /* An absolute 16 bit branch, for which bit 10 should be set to
216 indicate that the branch is not expected to be taken. The lower
217 two bits must be zero. */
218 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
222 FALSE, /* pc_relative */
224 complain_overflow_bitfield, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_PPC_ADDR14_BRNTAKEN",/* name */
227 FALSE, /* partial_inplace */
229 0xfffc, /* dst_mask */
230 FALSE), /* pcrel_offset */
232 /* A relative 26 bit branch; the lower two bits must be zero. */
233 HOWTO (R_PPC_REL24, /* type */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
237 TRUE, /* pc_relative */
239 complain_overflow_signed, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_PPC_REL24", /* name */
242 FALSE, /* partial_inplace */
244 0x3fffffc, /* dst_mask */
245 TRUE), /* pcrel_offset */
247 /* A relative 16 bit branch; the lower two bits must be zero. */
248 HOWTO (R_PPC_REL14, /* type */
250 2, /* size (0 = byte, 1 = short, 2 = long) */
252 TRUE, /* pc_relative */
254 complain_overflow_signed, /* complain_on_overflow */
255 bfd_elf_generic_reloc, /* special_function */
256 "R_PPC_REL14", /* name */
257 FALSE, /* partial_inplace */
259 0xfffc, /* dst_mask */
260 TRUE), /* pcrel_offset */
262 /* A relative 16 bit branch. Bit 10 should be set to indicate that
263 the branch is expected to be taken. The lower two bits must be
265 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
267 2, /* size (0 = byte, 1 = short, 2 = long) */
269 TRUE, /* pc_relative */
271 complain_overflow_signed, /* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC_REL14_BRTAKEN", /* name */
274 FALSE, /* partial_inplace */
276 0xfffc, /* dst_mask */
277 TRUE), /* pcrel_offset */
279 /* A relative 16 bit branch. Bit 10 should be set to indicate that
280 the branch is not expected to be taken. The lower two bits must
282 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
284 2, /* size (0 = byte, 1 = short, 2 = long) */
286 TRUE, /* pc_relative */
288 complain_overflow_signed, /* complain_on_overflow */
289 bfd_elf_generic_reloc, /* special_function */
290 "R_PPC_REL14_BRNTAKEN",/* name */
291 FALSE, /* partial_inplace */
293 0xfffc, /* dst_mask */
294 TRUE), /* pcrel_offset */
296 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
298 HOWTO (R_PPC_GOT16, /* type */
300 1, /* size (0 = byte, 1 = short, 2 = long) */
302 FALSE, /* pc_relative */
304 complain_overflow_signed, /* complain_on_overflow */
305 bfd_elf_generic_reloc, /* special_function */
306 "R_PPC_GOT16", /* name */
307 FALSE, /* partial_inplace */
309 0xffff, /* dst_mask */
310 FALSE), /* pcrel_offset */
312 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
314 HOWTO (R_PPC_GOT16_LO, /* type */
316 1, /* size (0 = byte, 1 = short, 2 = long) */
318 FALSE, /* pc_relative */
320 complain_overflow_dont, /* complain_on_overflow */
321 bfd_elf_generic_reloc, /* special_function */
322 "R_PPC_GOT16_LO", /* name */
323 FALSE, /* partial_inplace */
325 0xffff, /* dst_mask */
326 FALSE), /* pcrel_offset */
328 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
330 HOWTO (R_PPC_GOT16_HI, /* type */
332 1, /* size (0 = byte, 1 = short, 2 = long) */
334 FALSE, /* pc_relative */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_GOT16_HI", /* name */
339 FALSE, /* partial_inplace */
341 0xffff, /* dst_mask */
342 FALSE), /* pcrel_offset */
344 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
346 HOWTO (R_PPC_GOT16_HA, /* type */
348 1, /* size (0 = byte, 1 = short, 2 = long) */
350 FALSE, /* pc_relative */
352 complain_overflow_bitfield, /* complain_on_overflow */
353 ppc_elf_addr16_ha_reloc, /* special_function */
354 "R_PPC_GOT16_HA", /* name */
355 FALSE, /* partial_inplace */
357 0xffff, /* dst_mask */
358 FALSE), /* pcrel_offset */
360 /* Like R_PPC_REL24, but referring to the procedure linkage table
361 entry for the symbol. */
362 HOWTO (R_PPC_PLTREL24, /* type */
364 2, /* size (0 = byte, 1 = short, 2 = long) */
366 TRUE, /* pc_relative */
368 complain_overflow_signed, /* complain_on_overflow */
369 bfd_elf_generic_reloc, /* special_function */
370 "R_PPC_PLTREL24", /* name */
371 FALSE, /* partial_inplace */
373 0x3fffffc, /* dst_mask */
374 TRUE), /* pcrel_offset */
376 /* This is used only by the dynamic linker. The symbol should exist
377 both in the object being run and in some shared library. The
378 dynamic linker copies the data addressed by the symbol from the
379 shared library into the object, because the object being
380 run has to have the data at some particular address. */
381 HOWTO (R_PPC_COPY, /* type */
383 2, /* size (0 = byte, 1 = short, 2 = long) */
385 FALSE, /* pc_relative */
387 complain_overflow_bitfield, /* complain_on_overflow */
388 bfd_elf_generic_reloc, /* special_function */
389 "R_PPC_COPY", /* name */
390 FALSE, /* partial_inplace */
393 FALSE), /* pcrel_offset */
395 /* Like R_PPC_ADDR32, but used when setting global offset table
397 HOWTO (R_PPC_GLOB_DAT, /* type */
399 2, /* size (0 = byte, 1 = short, 2 = long) */
401 FALSE, /* pc_relative */
403 complain_overflow_bitfield, /* complain_on_overflow */
404 bfd_elf_generic_reloc, /* special_function */
405 "R_PPC_GLOB_DAT", /* name */
406 FALSE, /* partial_inplace */
408 0xffffffff, /* dst_mask */
409 FALSE), /* pcrel_offset */
411 /* Marks a procedure linkage table entry for a symbol. */
412 HOWTO (R_PPC_JMP_SLOT, /* type */
414 2, /* size (0 = byte, 1 = short, 2 = long) */
416 FALSE, /* pc_relative */
418 complain_overflow_bitfield, /* complain_on_overflow */
419 bfd_elf_generic_reloc, /* special_function */
420 "R_PPC_JMP_SLOT", /* name */
421 FALSE, /* partial_inplace */
424 FALSE), /* pcrel_offset */
426 /* Used only by the dynamic linker. When the object is run, this
427 longword is set to the load address of the object, plus the
429 HOWTO (R_PPC_RELATIVE, /* type */
431 2, /* size (0 = byte, 1 = short, 2 = long) */
433 FALSE, /* pc_relative */
435 complain_overflow_bitfield, /* complain_on_overflow */
436 bfd_elf_generic_reloc, /* special_function */
437 "R_PPC_RELATIVE", /* name */
438 FALSE, /* partial_inplace */
440 0xffffffff, /* dst_mask */
441 FALSE), /* pcrel_offset */
443 /* Like R_PPC_REL24, but uses the value of the symbol within the
444 object rather than the final value. Normally used for
445 _GLOBAL_OFFSET_TABLE_. */
446 HOWTO (R_PPC_LOCAL24PC, /* type */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
450 TRUE, /* pc_relative */
452 complain_overflow_signed, /* complain_on_overflow */
453 bfd_elf_generic_reloc, /* special_function */
454 "R_PPC_LOCAL24PC", /* name */
455 FALSE, /* partial_inplace */
457 0x3fffffc, /* dst_mask */
458 TRUE), /* pcrel_offset */
460 /* Like R_PPC_ADDR32, but may be unaligned. */
461 HOWTO (R_PPC_UADDR32, /* type */
463 2, /* size (0 = byte, 1 = short, 2 = long) */
465 FALSE, /* pc_relative */
467 complain_overflow_bitfield, /* complain_on_overflow */
468 bfd_elf_generic_reloc, /* special_function */
469 "R_PPC_UADDR32", /* name */
470 FALSE, /* partial_inplace */
472 0xffffffff, /* dst_mask */
473 FALSE), /* pcrel_offset */
475 /* Like R_PPC_ADDR16, but may be unaligned. */
476 HOWTO (R_PPC_UADDR16, /* type */
478 1, /* size (0 = byte, 1 = short, 2 = long) */
480 FALSE, /* pc_relative */
482 complain_overflow_bitfield, /* complain_on_overflow */
483 bfd_elf_generic_reloc, /* special_function */
484 "R_PPC_UADDR16", /* name */
485 FALSE, /* partial_inplace */
487 0xffff, /* dst_mask */
488 FALSE), /* pcrel_offset */
490 /* 32-bit PC relative */
491 HOWTO (R_PPC_REL32, /* type */
493 2, /* size (0 = byte, 1 = short, 2 = long) */
495 TRUE, /* pc_relative */
497 complain_overflow_bitfield, /* complain_on_overflow */
498 bfd_elf_generic_reloc, /* special_function */
499 "R_PPC_REL32", /* name */
500 FALSE, /* partial_inplace */
502 0xffffffff, /* dst_mask */
503 TRUE), /* pcrel_offset */
505 /* 32-bit relocation to the symbol's procedure linkage table.
506 FIXME: not supported. */
507 HOWTO (R_PPC_PLT32, /* type */
509 2, /* size (0 = byte, 1 = short, 2 = long) */
511 FALSE, /* pc_relative */
513 complain_overflow_bitfield, /* complain_on_overflow */
514 bfd_elf_generic_reloc, /* special_function */
515 "R_PPC_PLT32", /* name */
516 FALSE, /* partial_inplace */
519 FALSE), /* pcrel_offset */
521 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
522 FIXME: not supported. */
523 HOWTO (R_PPC_PLTREL32, /* type */
525 2, /* size (0 = byte, 1 = short, 2 = long) */
527 TRUE, /* pc_relative */
529 complain_overflow_bitfield, /* complain_on_overflow */
530 bfd_elf_generic_reloc, /* special_function */
531 "R_PPC_PLTREL32", /* name */
532 FALSE, /* partial_inplace */
535 TRUE), /* pcrel_offset */
537 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
539 HOWTO (R_PPC_PLT16_LO, /* type */
541 1, /* size (0 = byte, 1 = short, 2 = long) */
543 FALSE, /* pc_relative */
545 complain_overflow_dont, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_PPC_PLT16_LO", /* name */
548 FALSE, /* partial_inplace */
550 0xffff, /* dst_mask */
551 FALSE), /* pcrel_offset */
553 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
555 HOWTO (R_PPC_PLT16_HI, /* type */
557 1, /* size (0 = byte, 1 = short, 2 = long) */
559 FALSE, /* pc_relative */
561 complain_overflow_bitfield, /* complain_on_overflow */
562 bfd_elf_generic_reloc, /* special_function */
563 "R_PPC_PLT16_HI", /* name */
564 FALSE, /* partial_inplace */
566 0xffff, /* dst_mask */
567 FALSE), /* pcrel_offset */
569 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
571 HOWTO (R_PPC_PLT16_HA, /* type */
573 1, /* size (0 = byte, 1 = short, 2 = long) */
575 FALSE, /* pc_relative */
577 complain_overflow_bitfield, /* complain_on_overflow */
578 ppc_elf_addr16_ha_reloc, /* special_function */
579 "R_PPC_PLT16_HA", /* name */
580 FALSE, /* partial_inplace */
582 0xffff, /* dst_mask */
583 FALSE), /* pcrel_offset */
585 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
587 HOWTO (R_PPC_SDAREL16, /* type */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
591 FALSE, /* pc_relative */
593 complain_overflow_signed, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC_SDAREL16", /* name */
596 FALSE, /* partial_inplace */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
601 /* 16-bit section relative relocation. */
602 HOWTO (R_PPC_SECTOFF, /* type */
604 1, /* size (0 = byte, 1 = short, 2 = long) */
606 FALSE, /* pc_relative */
608 complain_overflow_bitfield, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC_SECTOFF", /* name */
611 FALSE, /* partial_inplace */
613 0xffff, /* dst_mask */
614 FALSE), /* pcrel_offset */
616 /* 16-bit lower half section relative relocation. */
617 HOWTO (R_PPC_SECTOFF_LO, /* type */
619 1, /* size (0 = byte, 1 = short, 2 = long) */
621 FALSE, /* pc_relative */
623 complain_overflow_dont, /* complain_on_overflow */
624 bfd_elf_generic_reloc, /* special_function */
625 "R_PPC_SECTOFF_LO", /* name */
626 FALSE, /* partial_inplace */
628 0xffff, /* dst_mask */
629 FALSE), /* pcrel_offset */
631 /* 16-bit upper half section relative relocation. */
632 HOWTO (R_PPC_SECTOFF_HI, /* type */
634 1, /* size (0 = byte, 1 = short, 2 = long) */
636 FALSE, /* pc_relative */
638 complain_overflow_bitfield, /* complain_on_overflow */
639 bfd_elf_generic_reloc, /* special_function */
640 "R_PPC_SECTOFF_HI", /* name */
641 FALSE, /* partial_inplace */
643 0xffff, /* dst_mask */
644 FALSE), /* pcrel_offset */
646 /* 16-bit upper half adjusted section relative relocation. */
647 HOWTO (R_PPC_SECTOFF_HA, /* type */
649 1, /* size (0 = byte, 1 = short, 2 = long) */
651 FALSE, /* pc_relative */
653 complain_overflow_bitfield, /* complain_on_overflow */
654 ppc_elf_addr16_ha_reloc, /* special_function */
655 "R_PPC_SECTOFF_HA", /* name */
656 FALSE, /* partial_inplace */
658 0xffff, /* dst_mask */
659 FALSE), /* pcrel_offset */
661 /* Marker reloc for TLS. */
664 2, /* size (0 = byte, 1 = short, 2 = long) */
666 FALSE, /* pc_relative */
668 complain_overflow_dont, /* complain_on_overflow */
669 bfd_elf_generic_reloc, /* special_function */
670 "R_PPC_TLS", /* name */
671 FALSE, /* partial_inplace */
674 FALSE), /* pcrel_offset */
676 /* Computes the load module index of the load module that contains the
677 definition of its TLS sym. */
678 HOWTO (R_PPC_DTPMOD32,
680 2, /* size (0 = byte, 1 = short, 2 = long) */
682 FALSE, /* pc_relative */
684 complain_overflow_dont, /* complain_on_overflow */
685 ppc_elf_unhandled_reloc, /* special_function */
686 "R_PPC_DTPMOD32", /* name */
687 FALSE, /* partial_inplace */
689 0xffffffff, /* dst_mask */
690 FALSE), /* pcrel_offset */
692 /* Computes a dtv-relative displacement, the difference between the value
693 of sym+add and the base address of the thread-local storage block that
694 contains the definition of sym, minus 0x8000. */
695 HOWTO (R_PPC_DTPREL32,
697 2, /* size (0 = byte, 1 = short, 2 = long) */
699 FALSE, /* pc_relative */
701 complain_overflow_dont, /* complain_on_overflow */
702 ppc_elf_unhandled_reloc, /* special_function */
703 "R_PPC_DTPREL32", /* name */
704 FALSE, /* partial_inplace */
706 0xffffffff, /* dst_mask */
707 FALSE), /* pcrel_offset */
709 /* A 16 bit dtprel reloc. */
710 HOWTO (R_PPC_DTPREL16,
712 1, /* size (0 = byte, 1 = short, 2 = long) */
714 FALSE, /* pc_relative */
716 complain_overflow_signed, /* complain_on_overflow */
717 ppc_elf_unhandled_reloc, /* special_function */
718 "R_PPC_DTPREL16", /* name */
719 FALSE, /* partial_inplace */
721 0xffff, /* dst_mask */
722 FALSE), /* pcrel_offset */
724 /* Like DTPREL16, but no overflow. */
725 HOWTO (R_PPC_DTPREL16_LO,
727 1, /* size (0 = byte, 1 = short, 2 = long) */
729 FALSE, /* pc_relative */
731 complain_overflow_dont, /* complain_on_overflow */
732 ppc_elf_unhandled_reloc, /* special_function */
733 "R_PPC_DTPREL16_LO", /* name */
734 FALSE, /* partial_inplace */
736 0xffff, /* dst_mask */
737 FALSE), /* pcrel_offset */
739 /* Like DTPREL16_LO, but next higher group of 16 bits. */
740 HOWTO (R_PPC_DTPREL16_HI,
742 1, /* size (0 = byte, 1 = short, 2 = long) */
744 FALSE, /* pc_relative */
746 complain_overflow_dont, /* complain_on_overflow */
747 ppc_elf_unhandled_reloc, /* special_function */
748 "R_PPC_DTPREL16_HI", /* name */
749 FALSE, /* partial_inplace */
751 0xffff, /* dst_mask */
752 FALSE), /* pcrel_offset */
754 /* Like DTPREL16_HI, but adjust for low 16 bits. */
755 HOWTO (R_PPC_DTPREL16_HA,
757 1, /* size (0 = byte, 1 = short, 2 = long) */
759 FALSE, /* pc_relative */
761 complain_overflow_dont, /* complain_on_overflow */
762 ppc_elf_unhandled_reloc, /* special_function */
763 "R_PPC_DTPREL16_HA", /* name */
764 FALSE, /* partial_inplace */
766 0xffff, /* dst_mask */
767 FALSE), /* pcrel_offset */
769 /* Computes a tp-relative displacement, the difference between the value of
770 sym+add and the value of the thread pointer (r13). */
771 HOWTO (R_PPC_TPREL32,
773 2, /* size (0 = byte, 1 = short, 2 = long) */
775 FALSE, /* pc_relative */
777 complain_overflow_dont, /* complain_on_overflow */
778 ppc_elf_unhandled_reloc, /* special_function */
779 "R_PPC_TPREL32", /* name */
780 FALSE, /* partial_inplace */
782 0xffffffff, /* dst_mask */
783 FALSE), /* pcrel_offset */
785 /* A 16 bit tprel reloc. */
786 HOWTO (R_PPC_TPREL16,
788 1, /* size (0 = byte, 1 = short, 2 = long) */
790 FALSE, /* pc_relative */
792 complain_overflow_signed, /* complain_on_overflow */
793 ppc_elf_unhandled_reloc, /* special_function */
794 "R_PPC_TPREL16", /* name */
795 FALSE, /* partial_inplace */
797 0xffff, /* dst_mask */
798 FALSE), /* pcrel_offset */
800 /* Like TPREL16, but no overflow. */
801 HOWTO (R_PPC_TPREL16_LO,
803 1, /* size (0 = byte, 1 = short, 2 = long) */
805 FALSE, /* pc_relative */
807 complain_overflow_dont, /* complain_on_overflow */
808 ppc_elf_unhandled_reloc, /* special_function */
809 "R_PPC_TPREL16_LO", /* name */
810 FALSE, /* partial_inplace */
812 0xffff, /* dst_mask */
813 FALSE), /* pcrel_offset */
815 /* Like TPREL16_LO, but next higher group of 16 bits. */
816 HOWTO (R_PPC_TPREL16_HI,
818 1, /* size (0 = byte, 1 = short, 2 = long) */
820 FALSE, /* pc_relative */
822 complain_overflow_dont, /* complain_on_overflow */
823 ppc_elf_unhandled_reloc, /* special_function */
824 "R_PPC_TPREL16_HI", /* name */
825 FALSE, /* partial_inplace */
827 0xffff, /* dst_mask */
828 FALSE), /* pcrel_offset */
830 /* Like TPREL16_HI, but adjust for low 16 bits. */
831 HOWTO (R_PPC_TPREL16_HA,
833 1, /* size (0 = byte, 1 = short, 2 = long) */
835 FALSE, /* pc_relative */
837 complain_overflow_dont, /* complain_on_overflow */
838 ppc_elf_unhandled_reloc, /* special_function */
839 "R_PPC_TPREL16_HA", /* name */
840 FALSE, /* partial_inplace */
842 0xffff, /* dst_mask */
843 FALSE), /* pcrel_offset */
845 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
846 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
847 to the first entry. */
848 HOWTO (R_PPC_GOT_TLSGD16,
850 1, /* size (0 = byte, 1 = short, 2 = long) */
852 FALSE, /* pc_relative */
854 complain_overflow_signed, /* complain_on_overflow */
855 ppc_elf_unhandled_reloc, /* special_function */
856 "R_PPC_GOT_TLSGD16", /* name */
857 FALSE, /* partial_inplace */
859 0xffff, /* dst_mask */
860 FALSE), /* pcrel_offset */
862 /* Like GOT_TLSGD16, but no overflow. */
863 HOWTO (R_PPC_GOT_TLSGD16_LO,
865 1, /* size (0 = byte, 1 = short, 2 = long) */
867 FALSE, /* pc_relative */
869 complain_overflow_dont, /* complain_on_overflow */
870 ppc_elf_unhandled_reloc, /* special_function */
871 "R_PPC_GOT_TLSGD16_LO", /* name */
872 FALSE, /* partial_inplace */
874 0xffff, /* dst_mask */
875 FALSE), /* pcrel_offset */
877 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
878 HOWTO (R_PPC_GOT_TLSGD16_HI,
880 1, /* size (0 = byte, 1 = short, 2 = long) */
882 FALSE, /* pc_relative */
884 complain_overflow_dont, /* complain_on_overflow */
885 ppc_elf_unhandled_reloc, /* special_function */
886 "R_PPC_GOT_TLSGD16_HI", /* name */
887 FALSE, /* partial_inplace */
889 0xffff, /* dst_mask */
890 FALSE), /* pcrel_offset */
892 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
893 HOWTO (R_PPC_GOT_TLSGD16_HA,
895 1, /* size (0 = byte, 1 = short, 2 = long) */
897 FALSE, /* pc_relative */
899 complain_overflow_dont, /* complain_on_overflow */
900 ppc_elf_unhandled_reloc, /* special_function */
901 "R_PPC_GOT_TLSGD16_HA", /* name */
902 FALSE, /* partial_inplace */
904 0xffff, /* dst_mask */
905 FALSE), /* pcrel_offset */
907 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
908 with values (sym+add)@dtpmod and zero, and computes the offset to the
910 HOWTO (R_PPC_GOT_TLSLD16,
912 1, /* size (0 = byte, 1 = short, 2 = long) */
914 FALSE, /* pc_relative */
916 complain_overflow_signed, /* complain_on_overflow */
917 ppc_elf_unhandled_reloc, /* special_function */
918 "R_PPC_GOT_TLSLD16", /* name */
919 FALSE, /* partial_inplace */
921 0xffff, /* dst_mask */
922 FALSE), /* pcrel_offset */
924 /* Like GOT_TLSLD16, but no overflow. */
925 HOWTO (R_PPC_GOT_TLSLD16_LO,
927 1, /* size (0 = byte, 1 = short, 2 = long) */
929 FALSE, /* pc_relative */
931 complain_overflow_dont, /* complain_on_overflow */
932 ppc_elf_unhandled_reloc, /* special_function */
933 "R_PPC_GOT_TLSLD16_LO", /* name */
934 FALSE, /* partial_inplace */
936 0xffff, /* dst_mask */
937 FALSE), /* pcrel_offset */
939 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
940 HOWTO (R_PPC_GOT_TLSLD16_HI,
942 1, /* size (0 = byte, 1 = short, 2 = long) */
944 FALSE, /* pc_relative */
946 complain_overflow_dont, /* complain_on_overflow */
947 ppc_elf_unhandled_reloc, /* special_function */
948 "R_PPC_GOT_TLSLD16_HI", /* name */
949 FALSE, /* partial_inplace */
951 0xffff, /* dst_mask */
952 FALSE), /* pcrel_offset */
954 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
955 HOWTO (R_PPC_GOT_TLSLD16_HA,
957 1, /* size (0 = byte, 1 = short, 2 = long) */
959 FALSE, /* pc_relative */
961 complain_overflow_dont, /* complain_on_overflow */
962 ppc_elf_unhandled_reloc, /* special_function */
963 "R_PPC_GOT_TLSLD16_HA", /* name */
964 FALSE, /* partial_inplace */
966 0xffff, /* dst_mask */
967 FALSE), /* pcrel_offset */
969 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
970 the offset to the entry. */
971 HOWTO (R_PPC_GOT_DTPREL16,
973 1, /* size (0 = byte, 1 = short, 2 = long) */
975 FALSE, /* pc_relative */
977 complain_overflow_signed, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_GOT_DTPREL16", /* name */
980 FALSE, /* partial_inplace */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
985 /* Like GOT_DTPREL16, but no overflow. */
986 HOWTO (R_PPC_GOT_DTPREL16_LO,
988 1, /* size (0 = byte, 1 = short, 2 = long) */
990 FALSE, /* pc_relative */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc_elf_unhandled_reloc, /* special_function */
994 "R_PPC_GOT_DTPREL16_LO", /* name */
995 FALSE, /* partial_inplace */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
1000 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1001 HOWTO (R_PPC_GOT_DTPREL16_HI,
1002 16, /* rightshift */
1003 1, /* size (0 = byte, 1 = short, 2 = long) */
1005 FALSE, /* pc_relative */
1007 complain_overflow_dont, /* complain_on_overflow */
1008 ppc_elf_unhandled_reloc, /* special_function */
1009 "R_PPC_GOT_DTPREL16_HI", /* name */
1010 FALSE, /* partial_inplace */
1012 0xffff, /* dst_mask */
1013 FALSE), /* pcrel_offset */
1015 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1016 HOWTO (R_PPC_GOT_DTPREL16_HA,
1017 16, /* rightshift */
1018 1, /* size (0 = byte, 1 = short, 2 = long) */
1020 FALSE, /* pc_relative */
1022 complain_overflow_dont, /* complain_on_overflow */
1023 ppc_elf_unhandled_reloc, /* special_function */
1024 "R_PPC_GOT_DTPREL16_HA", /* name */
1025 FALSE, /* partial_inplace */
1027 0xffff, /* dst_mask */
1028 FALSE), /* pcrel_offset */
1030 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1031 offset to the entry. */
1032 HOWTO (R_PPC_GOT_TPREL16,
1034 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 FALSE, /* pc_relative */
1038 complain_overflow_signed, /* complain_on_overflow */
1039 ppc_elf_unhandled_reloc, /* special_function */
1040 "R_PPC_GOT_TPREL16", /* name */
1041 FALSE, /* partial_inplace */
1043 0xffff, /* dst_mask */
1044 FALSE), /* pcrel_offset */
1046 /* Like GOT_TPREL16, but no overflow. */
1047 HOWTO (R_PPC_GOT_TPREL16_LO,
1049 1, /* size (0 = byte, 1 = short, 2 = long) */
1051 FALSE, /* pc_relative */
1053 complain_overflow_dont, /* complain_on_overflow */
1054 ppc_elf_unhandled_reloc, /* special_function */
1055 "R_PPC_GOT_TPREL16_LO", /* name */
1056 FALSE, /* partial_inplace */
1058 0xffff, /* dst_mask */
1059 FALSE), /* pcrel_offset */
1061 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1062 HOWTO (R_PPC_GOT_TPREL16_HI,
1063 16, /* rightshift */
1064 1, /* size (0 = byte, 1 = short, 2 = long) */
1066 FALSE, /* pc_relative */
1068 complain_overflow_dont, /* complain_on_overflow */
1069 ppc_elf_unhandled_reloc, /* special_function */
1070 "R_PPC_GOT_TPREL16_HI", /* name */
1071 FALSE, /* partial_inplace */
1073 0xffff, /* dst_mask */
1074 FALSE), /* pcrel_offset */
1076 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1077 HOWTO (R_PPC_GOT_TPREL16_HA,
1078 16, /* rightshift */
1079 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 FALSE, /* pc_relative */
1083 complain_overflow_dont, /* complain_on_overflow */
1084 ppc_elf_unhandled_reloc, /* special_function */
1085 "R_PPC_GOT_TPREL16_HA", /* name */
1086 FALSE, /* partial_inplace */
1088 0xffff, /* dst_mask */
1089 FALSE), /* pcrel_offset */
1091 /* The remaining relocs are from the Embedded ELF ABI, and are not
1092 in the SVR4 ELF ABI. */
1094 /* 32 bit value resulting from the addend minus the symbol. */
1095 HOWTO (R_PPC_EMB_NADDR32, /* type */
1097 2, /* size (0 = byte, 1 = short, 2 = long) */
1099 FALSE, /* pc_relative */
1101 complain_overflow_bitfield, /* complain_on_overflow */
1102 bfd_elf_generic_reloc, /* special_function */
1103 "R_PPC_EMB_NADDR32", /* name */
1104 FALSE, /* partial_inplace */
1106 0xffffffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1109 /* 16 bit value resulting from the addend minus the symbol. */
1110 HOWTO (R_PPC_EMB_NADDR16, /* type */
1112 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 FALSE, /* pc_relative */
1116 complain_overflow_bitfield, /* complain_on_overflow */
1117 bfd_elf_generic_reloc, /* special_function */
1118 "R_PPC_EMB_NADDR16", /* name */
1119 FALSE, /* partial_inplace */
1121 0xffff, /* dst_mask */
1122 FALSE), /* pcrel_offset */
1124 /* 16 bit value resulting from the addend minus the symbol. */
1125 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1127 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 FALSE, /* pc_relative */
1131 complain_overflow_dont,/* complain_on_overflow */
1132 bfd_elf_generic_reloc, /* special_function */
1133 "R_PPC_EMB_ADDR16_LO", /* name */
1134 FALSE, /* partial_inplace */
1136 0xffff, /* dst_mask */
1137 FALSE), /* pcrel_offset */
1139 /* The high order 16 bits of the addend minus the symbol. */
1140 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1141 16, /* rightshift */
1142 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 FALSE, /* pc_relative */
1146 complain_overflow_dont, /* complain_on_overflow */
1147 bfd_elf_generic_reloc, /* special_function */
1148 "R_PPC_EMB_NADDR16_HI", /* name */
1149 FALSE, /* partial_inplace */
1151 0xffff, /* dst_mask */
1152 FALSE), /* pcrel_offset */
1154 /* The high order 16 bits of the result of the addend minus the address,
1155 plus 1 if the contents of the low 16 bits, treated as a signed number,
1157 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1158 16, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1161 FALSE, /* pc_relative */
1163 complain_overflow_dont, /* complain_on_overflow */
1164 ppc_elf_addr16_ha_reloc, /* special_function */
1165 "R_PPC_EMB_NADDR16_HA", /* name */
1166 FALSE, /* partial_inplace */
1168 0xffff, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1171 /* 16 bit value resulting from allocating a 4 byte word to hold an
1172 address in the .sdata section, and returning the offset from
1173 _SDA_BASE_ for that relocation. */
1174 HOWTO (R_PPC_EMB_SDAI16, /* type */
1176 1, /* size (0 = byte, 1 = short, 2 = long) */
1178 FALSE, /* pc_relative */
1180 complain_overflow_bitfield, /* complain_on_overflow */
1181 bfd_elf_generic_reloc, /* special_function */
1182 "R_PPC_EMB_SDAI16", /* name */
1183 FALSE, /* partial_inplace */
1185 0xffff, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1188 /* 16 bit value resulting from allocating a 4 byte word to hold an
1189 address in the .sdata2 section, and returning the offset from
1190 _SDA2_BASE_ for that relocation. */
1191 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1193 1, /* size (0 = byte, 1 = short, 2 = long) */
1195 FALSE, /* pc_relative */
1197 complain_overflow_bitfield, /* complain_on_overflow */
1198 bfd_elf_generic_reloc, /* special_function */
1199 "R_PPC_EMB_SDA2I16", /* name */
1200 FALSE, /* partial_inplace */
1202 0xffff, /* dst_mask */
1203 FALSE), /* pcrel_offset */
1205 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1206 small data items. */
1207 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1209 1, /* size (0 = byte, 1 = short, 2 = long) */
1211 FALSE, /* pc_relative */
1213 complain_overflow_signed, /* complain_on_overflow */
1214 bfd_elf_generic_reloc, /* special_function */
1215 "R_PPC_EMB_SDA2REL", /* name */
1216 FALSE, /* partial_inplace */
1218 0xffff, /* dst_mask */
1219 FALSE), /* pcrel_offset */
1221 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1222 signed offset from the appropriate base, and filling in the register
1223 field with the appropriate register (0, 2, or 13). */
1224 HOWTO (R_PPC_EMB_SDA21, /* type */
1226 2, /* size (0 = byte, 1 = short, 2 = long) */
1228 FALSE, /* pc_relative */
1230 complain_overflow_signed, /* complain_on_overflow */
1231 bfd_elf_generic_reloc, /* special_function */
1232 "R_PPC_EMB_SDA21", /* name */
1233 FALSE, /* partial_inplace */
1235 0xffff, /* dst_mask */
1236 FALSE), /* pcrel_offset */
1238 /* Relocation not handled: R_PPC_EMB_MRKREF */
1239 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1240 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1241 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1242 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1243 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1245 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1246 in the 16 bit signed offset from the appropriate base, and filling in the
1247 register field with the appropriate register (0, 2, or 13). */
1248 HOWTO (R_PPC_EMB_RELSDA, /* type */
1250 1, /* size (0 = byte, 1 = short, 2 = long) */
1252 TRUE, /* pc_relative */
1254 complain_overflow_signed, /* complain_on_overflow */
1255 bfd_elf_generic_reloc, /* special_function */
1256 "R_PPC_EMB_RELSDA", /* name */
1257 FALSE, /* partial_inplace */
1259 0xffff, /* dst_mask */
1260 FALSE), /* pcrel_offset */
1262 /* GNU extension to record C++ vtable hierarchy. */
1263 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1265 0, /* size (0 = byte, 1 = short, 2 = long) */
1267 FALSE, /* pc_relative */
1269 complain_overflow_dont, /* complain_on_overflow */
1270 NULL, /* special_function */
1271 "R_PPC_GNU_VTINHERIT", /* name */
1272 FALSE, /* partial_inplace */
1275 FALSE), /* pcrel_offset */
1277 /* GNU extension to record C++ vtable member usage. */
1278 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1280 0, /* size (0 = byte, 1 = short, 2 = long) */
1282 FALSE, /* pc_relative */
1284 complain_overflow_dont, /* complain_on_overflow */
1285 NULL, /* special_function */
1286 "R_PPC_GNU_VTENTRY", /* name */
1287 FALSE, /* partial_inplace */
1290 FALSE), /* pcrel_offset */
1292 /* Phony reloc to handle AIX style TOC entries. */
1293 HOWTO (R_PPC_TOC16, /* type */
1295 1, /* size (0 = byte, 1 = short, 2 = long) */
1297 FALSE, /* pc_relative */
1299 complain_overflow_signed, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 "R_PPC_TOC16", /* name */
1302 FALSE, /* partial_inplace */
1304 0xffff, /* dst_mask */
1305 FALSE), /* pcrel_offset */
1308 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1311 ppc_elf_howto_init (void)
1313 unsigned int i, type;
1316 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1319 type = ppc_elf_howto_raw[i].type;
1320 if (type >= (sizeof (ppc_elf_howto_table)
1321 / sizeof (ppc_elf_howto_table[0])))
1323 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1327 static reloc_howto_type *
1328 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1329 bfd_reloc_code_real_type code)
1331 enum elf_ppc_reloc_type r;
1333 /* Initialize howto table if not already done. */
1334 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1335 ppc_elf_howto_init ();
1342 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1343 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1344 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1345 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1346 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1347 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1348 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1349 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1350 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1351 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1352 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1353 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1354 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1355 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1356 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1357 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1358 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1359 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1360 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1361 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1362 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1363 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1364 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1365 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1366 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1367 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1368 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1369 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1370 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1371 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1372 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1373 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1374 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1375 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1376 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1377 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1378 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1379 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1380 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1381 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1382 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1383 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1384 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1385 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1386 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1387 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1388 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1389 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1390 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1391 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1392 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1393 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1394 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1395 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1396 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1397 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1398 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1399 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1400 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1401 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1402 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1403 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1404 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1405 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1406 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1407 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1408 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1409 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1410 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1411 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1412 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1413 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1414 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1415 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1416 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1417 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1418 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1419 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1420 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1421 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1422 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1425 return ppc_elf_howto_table[r];
1428 /* Set the howto pointer for a PowerPC ELF reloc. */
1431 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1433 Elf_Internal_Rela *dst)
1435 /* Initialize howto table if not already done. */
1436 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1437 ppc_elf_howto_init ();
1439 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1440 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1443 /* Handle the R_PPC_ADDR16_HA reloc. */
1445 static bfd_reloc_status_type
1446 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1447 arelent *reloc_entry,
1449 void *data ATTRIBUTE_UNUSED,
1450 asection *input_section,
1452 char **error_message ATTRIBUTE_UNUSED)
1456 if (output_bfd != NULL)
1458 reloc_entry->address += input_section->output_offset;
1459 return bfd_reloc_ok;
1462 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1463 return bfd_reloc_outofrange;
1465 if (bfd_is_com_section (symbol->section))
1468 relocation = symbol->value;
1470 relocation += symbol->section->output_section->vma;
1471 relocation += symbol->section->output_offset;
1472 relocation += reloc_entry->addend;
1474 reloc_entry->addend += (relocation & 0x8000) << 1;
1476 return bfd_reloc_continue;
1479 static bfd_reloc_status_type
1480 ppc_elf_unhandled_reloc (bfd *abfd,
1481 arelent *reloc_entry,
1484 asection *input_section,
1486 char **error_message)
1488 /* If this is a relocatable link (output_bfd test tells us), just
1489 call the generic function. Any adjustment will be done at final
1491 if (output_bfd != NULL)
1492 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1493 input_section, output_bfd, error_message);
1495 if (error_message != NULL)
1497 static char buf[60];
1498 sprintf (buf, _("generic linker can't handle %s"),
1499 reloc_entry->howto->name);
1500 *error_message = buf;
1502 return bfd_reloc_dangerous;
1505 /* Sections created by the linker. */
1507 typedef struct elf_linker_section
1509 /* Pointer to the bfd section. */
1513 /* Associated bss section name. */
1514 const char *bss_name;
1515 /* Associated symbol name. */
1516 const char *sym_name;
1517 /* Value of symbol. */
1519 } elf_linker_section_t;
1521 /* Linked list of allocated pointer entries. This hangs off of the
1522 symbol lists, and provides allows us to return different pointers,
1523 based on different addend's. */
1525 typedef struct elf_linker_section_pointers
1527 /* next allocated pointer for this symbol */
1528 struct elf_linker_section_pointers *next;
1529 /* offset of pointer from beginning of section */
1533 /* which linker section this is */
1534 elf_linker_section_t *lsect;
1535 } elf_linker_section_pointers_t;
1537 struct ppc_elf_obj_tdata
1539 struct elf_obj_tdata elf;
1541 /* A mapping from local symbols to offsets into the various linker
1542 sections added. This is index by the symbol index. */
1543 elf_linker_section_pointers_t **linker_section_pointers;
1546 #define ppc_elf_tdata(bfd) \
1547 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1549 #define elf_local_ptr_offsets(bfd) \
1550 (ppc_elf_tdata (bfd)->linker_section_pointers)
1552 /* Override the generic function because we store some extras. */
1555 ppc_elf_mkobject (bfd *abfd)
1557 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1558 abfd->tdata.any = bfd_zalloc (abfd, amt);
1559 if (abfd->tdata.any == NULL)
1564 /* Fix bad default arch selected for a 32 bit input bfd when the
1565 default is 64 bit. */
1568 ppc_elf_object_p (bfd *abfd)
1570 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1572 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1574 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1576 /* Relies on arch after 64 bit default being 32 bit default. */
1577 abfd->arch_info = abfd->arch_info->next;
1578 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1584 /* Function to set whether a module needs the -mrelocatable bit set. */
1587 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1589 BFD_ASSERT (!elf_flags_init (abfd)
1590 || elf_elfheader (abfd)->e_flags == flags);
1592 elf_elfheader (abfd)->e_flags = flags;
1593 elf_flags_init (abfd) = TRUE;
1597 /* Support for core dump NOTE sections. */
1600 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1605 switch (note->descsz)
1610 case 268: /* Linux/PPC. */
1612 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1615 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1624 /* Make a ".reg/999" section. */
1625 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1626 size, note->descpos + offset);
1630 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1632 switch (note->descsz)
1637 case 128: /* Linux/PPC elf_prpsinfo. */
1638 elf_tdata (abfd)->core_program
1639 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1640 elf_tdata (abfd)->core_command
1641 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1644 /* Note that for some reason, a spurious space is tacked
1645 onto the end of the args in some (at least one anyway)
1646 implementations, so strip it off if it exists. */
1649 char *command = elf_tdata (abfd)->core_command;
1650 int n = strlen (command);
1652 if (0 < n && command[n - 1] == ' ')
1653 command[n - 1] = '\0';
1659 /* Return address for Ith PLT stub in section PLT, for relocation REL
1660 or (bfd_vma) -1 if it should not be included. */
1663 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1664 const asection *plt ATTRIBUTE_UNUSED,
1667 return rel->address;
1670 /* Handle a PowerPC specific section when reading an object file. This
1671 is called when bfd_section_from_shdr finds a section with an unknown
1675 ppc_elf_section_from_shdr (bfd *abfd,
1676 Elf_Internal_Shdr *hdr,
1683 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1686 newsect = hdr->bfd_section;
1687 flags = bfd_get_section_flags (abfd, newsect);
1688 if (hdr->sh_flags & SHF_EXCLUDE)
1689 flags |= SEC_EXCLUDE;
1691 if (hdr->sh_type == SHT_ORDERED)
1692 flags |= SEC_SORT_ENTRIES;
1694 bfd_set_section_flags (abfd, newsect, flags);
1698 /* Set up any other section flags and such that may be necessary. */
1701 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1702 Elf_Internal_Shdr *shdr,
1705 if ((asect->flags & SEC_EXCLUDE) != 0)
1706 shdr->sh_flags |= SHF_EXCLUDE;
1708 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1709 shdr->sh_type = SHT_ORDERED;
1714 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1715 need to bump up the number of section headers. */
1718 ppc_elf_additional_program_headers (bfd *abfd)
1723 s = bfd_get_section_by_name (abfd, ".sbss2");
1724 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1727 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1728 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1734 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1735 .PPC.EMB.sbss0 a normal section, and not a bss section so
1736 that the linker doesn't crater when trying to make more than
1739 static struct bfd_elf_special_section const ppc_elf_special_sections[]=
1741 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
1742 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1743 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1744 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
1745 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
1746 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
1747 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
1748 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
1749 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1750 { NULL, 0, 0, 0, 0 }
1753 /* Very simple linked list structure for recording apuinfo values. */
1754 typedef struct apuinfo_list
1756 struct apuinfo_list *next;
1757 unsigned long value;
1761 static apuinfo_list *head;
1765 apuinfo_list_init (void)
1771 apuinfo_list_add (unsigned long value)
1773 apuinfo_list *entry = head;
1775 while (entry != NULL)
1777 if (entry->value == value)
1779 entry = entry->next;
1782 entry = bfd_malloc (sizeof (* entry));
1786 entry->value = value;
1792 apuinfo_list_length (void)
1794 apuinfo_list *entry;
1795 unsigned long count;
1797 for (entry = head, count = 0;
1799 entry = entry->next)
1805 static inline unsigned long
1806 apuinfo_list_element (unsigned long number)
1808 apuinfo_list * entry;
1812 entry = entry->next)
1815 return entry ? entry->value : 0;
1819 apuinfo_list_finish (void)
1821 apuinfo_list *entry;
1823 for (entry = head; entry;)
1825 apuinfo_list *next = entry->next;
1833 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
1834 #define APUINFO_LABEL "APUinfo"
1836 /* Scan the input BFDs and create a linked list of
1837 the APUinfo values that will need to be emitted. */
1840 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
1845 unsigned num_input_sections;
1846 bfd_size_type output_section_size;
1848 unsigned num_entries;
1849 unsigned long offset;
1850 unsigned long length;
1851 const char *error_message = NULL;
1853 if (link_info == NULL)
1856 /* Scan the input bfds, looking for apuinfo sections. */
1857 num_input_sections = 0;
1858 output_section_size = 0;
1860 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
1862 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
1865 ++ num_input_sections;
1866 output_section_size += asec->size;
1870 /* We need at least one input sections
1871 in order to make merging worthwhile. */
1872 if (num_input_sections < 1)
1875 /* Just make sure that the output section exists as well. */
1876 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1880 /* Allocate a buffer for the contents of the input sections. */
1881 buffer = bfd_malloc (output_section_size);
1886 apuinfo_list_init ();
1888 /* Read in the input sections contents. */
1889 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
1891 unsigned long datum;
1894 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
1898 length = asec->size;
1901 error_message = _("corrupt or empty %s section in %B");
1905 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
1906 || (bfd_bread (buffer + offset, length, ibfd) != length))
1908 error_message = _("unable to read in %s section from %B");
1912 /* Process the contents of the section. */
1913 ptr = buffer + offset;
1914 error_message = _("corrupt %s section in %B");
1916 /* Verify the contents of the header. Note - we have to
1917 extract the values this way in order to allow for a
1918 host whose endian-ness is different from the target. */
1919 datum = bfd_get_32 (ibfd, ptr);
1920 if (datum != sizeof APUINFO_LABEL)
1923 datum = bfd_get_32 (ibfd, ptr + 8);
1927 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
1930 /* Get the number of bytes used for apuinfo entries. */
1931 datum = bfd_get_32 (ibfd, ptr + 4);
1932 if (datum + 20 != length)
1935 /* Make sure that we do not run off the end of the section. */
1936 if (offset + length > output_section_size)
1939 /* Scan the apuinfo section, building a list of apuinfo numbers. */
1940 for (i = 0; i < datum; i += 4)
1941 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
1943 /* Update the offset. */
1947 error_message = NULL;
1949 /* Compute the size of the output section. */
1950 num_entries = apuinfo_list_length ();
1951 output_section_size = 20 + num_entries * 4;
1953 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1955 if (! bfd_set_section_size (abfd, asec, output_section_size))
1957 error_message = _("warning: unable to set size of %s section in %B");
1963 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
1966 /* Prevent the output section from accumulating the input sections'
1967 contents. We have already stored this in our linked list structure. */
1970 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
1972 bfd_byte *contents ATTRIBUTE_UNUSED)
1974 return (apuinfo_list_length ()
1975 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
1978 /* Finally we can generate the output section. */
1981 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
1986 unsigned num_entries;
1987 bfd_size_type length;
1989 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1993 if (apuinfo_list_length () == 0)
1996 length = asec->size;
2000 buffer = bfd_malloc (length);
2003 (*_bfd_error_handler)
2004 (_("failed to allocate space for new APUinfo section."));
2008 /* Create the apuinfo header. */
2009 num_entries = apuinfo_list_length ();
2010 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2011 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2012 bfd_put_32 (abfd, 0x2, buffer + 8);
2013 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2016 for (i = 0; i < num_entries; i++)
2018 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2022 if (length != asec->size)
2023 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2025 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2026 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2030 apuinfo_list_finish ();
2033 /* The following functions are specific to the ELF linker, while
2034 functions above are used generally. They appear in this file more
2035 or less in the order in which they are called. eg.
2036 ppc_elf_check_relocs is called early in the link process,
2037 ppc_elf_finish_dynamic_sections is one of the last functions
2040 /* The PPC linker needs to keep track of the number of relocs that it
2041 decides to copy as dynamic relocs in check_relocs for each symbol.
2042 This is so that it can later discard them if they are found to be
2043 unnecessary. We store the information in a field extending the
2044 regular ELF linker hash table. */
2046 struct ppc_elf_dyn_relocs
2048 struct ppc_elf_dyn_relocs *next;
2050 /* The input section of the reloc. */
2053 /* Total number of relocs copied for the input section. */
2054 bfd_size_type count;
2056 /* Number of pc-relative relocs copied for the input section. */
2057 bfd_size_type pc_count;
2060 /* Of those relocs that might be copied as dynamic relocs, this macro
2061 selects those that must be copied when linking a shared library,
2062 even when the symbol is local. */
2064 #define MUST_BE_DYN_RELOC(RTYPE) \
2065 ((RTYPE) != R_PPC_REL24 \
2066 && (RTYPE) != R_PPC_REL14 \
2067 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2068 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2069 && (RTYPE) != R_PPC_REL32)
2071 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2072 copying dynamic variables from a shared lib into an app's dynbss
2073 section, and instead use a dynamic relocation to point into the
2075 #define ELIMINATE_COPY_RELOCS 1
2077 /* PPC ELF linker hash entry. */
2079 struct ppc_elf_link_hash_entry
2081 struct elf_link_hash_entry elf;
2083 /* If this symbol is used in the linker created sections, the processor
2084 specific backend uses this field to map the field into the offset
2085 from the beginning of the section. */
2086 elf_linker_section_pointers_t *linker_section_pointer;
2088 /* Track dynamic relocs copied for this symbol. */
2089 struct ppc_elf_dyn_relocs *dyn_relocs;
2091 /* Contexts in which symbol is used in the GOT (or TOC).
2092 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2093 corresponding relocs are encountered during check_relocs.
2094 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2095 indicate the corresponding GOT entry type is not needed. */
2096 #define TLS_GD 1 /* GD reloc. */
2097 #define TLS_LD 2 /* LD reloc. */
2098 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2099 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2100 #define TLS_TLS 16 /* Any TLS reloc. */
2101 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2105 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2107 /* PPC ELF linker hash table. */
2109 struct ppc_elf_link_hash_table
2111 struct elf_link_hash_table elf;
2113 /* Short-cuts to get to dynamic linker sections. */
2122 elf_linker_section_t sdata[2];
2125 /* Shortcut to .__tls_get_addr. */
2126 struct elf_link_hash_entry *tls_get_addr;
2128 /* TLS local dynamic got entry handling. */
2130 bfd_signed_vma refcount;
2134 /* Small local sym to section mapping cache. */
2135 struct sym_sec_cache sym_sec;
2138 /* Get the PPC ELF linker hash table from a link_info structure. */
2140 #define ppc_elf_hash_table(p) \
2141 ((struct ppc_elf_link_hash_table *) (p)->hash)
2143 /* Create an entry in a PPC ELF linker hash table. */
2145 static struct bfd_hash_entry *
2146 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2147 struct bfd_hash_table *table,
2150 /* Allocate the structure if it has not already been allocated by a
2154 entry = bfd_hash_allocate (table,
2155 sizeof (struct ppc_elf_link_hash_entry));
2160 /* Call the allocation method of the superclass. */
2161 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2164 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2165 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2166 ppc_elf_hash_entry (entry)->tls_mask = 0;
2172 /* Create a PPC ELF linker hash table. */
2174 static struct bfd_link_hash_table *
2175 ppc_elf_link_hash_table_create (bfd *abfd)
2177 struct ppc_elf_link_hash_table *ret;
2179 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2183 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
2184 ppc_elf_link_hash_newfunc))
2190 ret->sdata[0].name = ".sdata";
2191 ret->sdata[0].sym_name = "_SDA_BASE_";
2192 ret->sdata[0].bss_name = ".sbss";
2194 ret->sdata[1].name = ".sdata2";
2195 ret->sdata[1].sym_name = "_SDA2_BASE_";
2196 ret->sdata[1].bss_name = ".sbss2";
2198 return &ret->elf.root;
2201 /* The powerpc .got has a blrl instruction in it. Mark it executable. */
2204 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2206 struct ppc_elf_link_hash_table *htab;
2210 if (!_bfd_elf_create_got_section (abfd, info))
2213 htab = ppc_elf_hash_table (info);
2214 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2218 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2219 | SEC_LINKER_CREATED);
2220 if (!bfd_set_section_flags (abfd, s, flags))
2223 htab->relgot = bfd_make_section (abfd, ".rela.got");
2225 || ! bfd_set_section_flags (abfd, htab->relgot,
2226 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2227 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2229 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2235 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2236 to output sections (just like _bfd_elf_create_dynamic_sections has
2237 to create .dynbss and .rela.bss). */
2240 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2242 struct ppc_elf_link_hash_table *htab;
2246 htab = ppc_elf_hash_table (info);
2248 if (htab->got == NULL
2249 && !ppc_elf_create_got (abfd, info))
2252 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2255 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2256 | SEC_LINKER_CREATED);
2258 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2259 htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
2261 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC | SEC_LINKER_CREATED))
2266 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2267 htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss");
2269 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
2270 || ! bfd_set_section_alignment (abfd, s, 2))
2274 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2275 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2279 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
2280 return bfd_set_section_flags (abfd, s, flags);
2283 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2286 ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed,
2287 struct elf_link_hash_entry *dir,
2288 struct elf_link_hash_entry *ind)
2290 struct ppc_elf_link_hash_entry *edir, *eind;
2292 edir = (struct ppc_elf_link_hash_entry *) dir;
2293 eind = (struct ppc_elf_link_hash_entry *) ind;
2295 if (eind->dyn_relocs != NULL)
2297 if (edir->dyn_relocs != NULL)
2299 struct ppc_elf_dyn_relocs **pp;
2300 struct ppc_elf_dyn_relocs *p;
2302 if (ind->root.type == bfd_link_hash_indirect)
2305 /* Add reloc counts against the weak sym to the strong sym
2306 list. Merge any entries against the same section. */
2307 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2309 struct ppc_elf_dyn_relocs *q;
2311 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2312 if (q->sec == p->sec)
2314 q->pc_count += p->pc_count;
2315 q->count += p->count;
2322 *pp = edir->dyn_relocs;
2325 edir->dyn_relocs = eind->dyn_relocs;
2326 eind->dyn_relocs = NULL;
2329 edir->tls_mask |= eind->tls_mask;
2331 if (ELIMINATE_COPY_RELOCS
2332 && ind->root.type != bfd_link_hash_indirect
2333 && dir->dynamic_adjusted)
2335 /* If called to transfer flags for a weakdef during processing
2336 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2337 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2338 dir->ref_dynamic |= ind->ref_dynamic;
2339 dir->ref_regular |= ind->ref_regular;
2340 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
2341 dir->needs_plt |= ind->needs_plt;
2344 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
2347 /* Return 1 if target is one of ours. */
2350 is_ppc_elf_target (const struct bfd_target *targ)
2352 extern const bfd_target bfd_elf32_powerpc_vec;
2353 extern const bfd_target bfd_elf32_powerpcle_vec;
2355 return targ == &bfd_elf32_powerpc_vec || targ == &bfd_elf32_powerpcle_vec;
2358 /* Hook called by the linker routine which adds symbols from an object
2359 file. We use it to put .comm items in .sbss, and not .bss. */
2362 ppc_elf_add_symbol_hook (bfd *abfd,
2363 struct bfd_link_info *info,
2364 Elf_Internal_Sym *sym,
2365 const char **namep ATTRIBUTE_UNUSED,
2366 flagword *flagsp ATTRIBUTE_UNUSED,
2370 if (sym->st_shndx == SHN_COMMON
2371 && !info->relocatable
2372 && sym->st_size <= elf_gp_size (abfd)
2373 && is_ppc_elf_target (info->hash->creator))
2375 /* Common symbols less than or equal to -G nn bytes are automatically
2377 struct ppc_elf_link_hash_table *htab;
2379 htab = ppc_elf_hash_table (info);
2380 if (htab->sbss == NULL)
2382 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2384 if (!htab->elf.dynobj)
2385 htab->elf.dynobj = abfd;
2387 htab->sbss = bfd_make_section_anyway (htab->elf.dynobj, ".sbss");
2388 if (htab->sbss == NULL
2389 || ! bfd_set_section_flags (htab->elf.dynobj, htab->sbss, flags))
2394 *valp = sym->st_size;
2400 /* Create a special linker section. */
2403 ppc_elf_create_linker_section (bfd *abfd,
2404 struct bfd_link_info *info,
2406 elf_linker_section_t *lsect)
2408 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2411 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2412 | SEC_LINKER_CREATED);
2414 /* Record the first bfd that needs the special sections. */
2415 if (!htab->elf.dynobj)
2416 htab->elf.dynobj = abfd;
2418 s = bfd_make_section_anyway (htab->elf.dynobj, lsect->name);
2420 || !bfd_set_section_flags (htab->elf.dynobj, s, flags)
2421 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2428 /* Find a linker generated pointer with a given addend and type. */
2430 static elf_linker_section_pointers_t *
2431 elf_find_pointer_linker_section
2432 (elf_linker_section_pointers_t *linker_pointers,
2434 elf_linker_section_t *lsect)
2436 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2437 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2438 return linker_pointers;
2443 /* Allocate a pointer to live in a linker created section. */
2446 elf_create_pointer_linker_section (bfd *abfd,
2447 elf_linker_section_t *lsect,
2448 struct elf_link_hash_entry *h,
2449 const Elf_Internal_Rela *rel)
2451 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2452 elf_linker_section_pointers_t *linker_section_ptr;
2453 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2456 BFD_ASSERT (lsect != NULL);
2458 /* Is this a global symbol? */
2461 struct ppc_elf_link_hash_entry *eh;
2463 /* Has this symbol already been allocated? If so, our work is done. */
2464 eh = (struct ppc_elf_link_hash_entry *) h;
2465 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2470 ptr_linker_section_ptr = &eh->linker_section_pointer;
2474 /* Allocation of a pointer to a local symbol. */
2475 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2477 /* Allocate a table to hold the local symbols if first time. */
2480 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2483 amt *= sizeof (elf_linker_section_pointers_t *);
2484 ptr = bfd_zalloc (abfd, amt);
2489 elf_local_ptr_offsets (abfd) = ptr;
2492 /* Has this symbol already been allocated? If so, our work is done. */
2493 if (elf_find_pointer_linker_section (ptr[r_symndx],
2498 ptr_linker_section_ptr = &ptr[r_symndx];
2501 /* Allocate space for a pointer in the linker section, and allocate
2502 a new pointer record from internal memory. */
2503 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2504 amt = sizeof (elf_linker_section_pointers_t);
2505 linker_section_ptr = bfd_alloc (abfd, amt);
2507 if (!linker_section_ptr)
2510 linker_section_ptr->next = *ptr_linker_section_ptr;
2511 linker_section_ptr->addend = rel->r_addend;
2512 linker_section_ptr->lsect = lsect;
2513 *ptr_linker_section_ptr = linker_section_ptr;
2515 linker_section_ptr->offset = lsect->section->size;
2516 lsect->section->size += 4;
2520 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2521 lsect->name, (long) linker_section_ptr->offset,
2522 (long) lsect->section->size);
2529 update_local_sym_info (bfd *abfd,
2530 Elf_Internal_Shdr *symtab_hdr,
2531 unsigned long r_symndx,
2534 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2535 char *local_got_tls_masks;
2537 if (local_got_refcounts == NULL)
2539 bfd_size_type size = symtab_hdr->sh_info;
2541 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2542 local_got_refcounts = bfd_zalloc (abfd, size);
2543 if (local_got_refcounts == NULL)
2545 elf_local_got_refcounts (abfd) = local_got_refcounts;
2548 local_got_refcounts[r_symndx] += 1;
2549 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2550 local_got_tls_masks[r_symndx] |= tls_type;
2555 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2557 (*_bfd_error_handler)
2558 (_("%B: relocation %s cannot be used when making a shared object"),
2560 ppc_elf_howto_table[r_type]->name);
2561 bfd_set_error (bfd_error_bad_value);
2564 /* Look through the relocs for a section during the first phase, and
2565 allocate space in the global offset table or procedure linkage
2569 ppc_elf_check_relocs (bfd *abfd,
2570 struct bfd_link_info *info,
2572 const Elf_Internal_Rela *relocs)
2574 struct ppc_elf_link_hash_table *htab;
2575 Elf_Internal_Shdr *symtab_hdr;
2576 struct elf_link_hash_entry **sym_hashes;
2577 const Elf_Internal_Rela *rel;
2578 const Elf_Internal_Rela *rel_end;
2581 if (info->relocatable)
2585 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2589 /* Initialize howto table if not already done. */
2590 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2591 ppc_elf_howto_init ();
2593 htab = ppc_elf_hash_table (info);
2594 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2595 sym_hashes = elf_sym_hashes (abfd);
2598 rel_end = relocs + sec->reloc_count;
2599 for (rel = relocs; rel < rel_end; rel++)
2601 unsigned long r_symndx;
2602 enum elf_ppc_reloc_type r_type;
2603 struct elf_link_hash_entry *h;
2606 r_symndx = ELF32_R_SYM (rel->r_info);
2607 if (r_symndx < symtab_hdr->sh_info)
2610 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2612 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
2613 This shows up in particular in an R_PPC_ADDR32 in the eabi
2615 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2617 if (htab->got == NULL)
2619 if (htab->elf.dynobj == NULL)
2620 htab->elf.dynobj = abfd;
2621 if (!ppc_elf_create_got (htab->elf.dynobj, info))
2626 r_type = ELF32_R_TYPE (rel->r_info);
2629 case R_PPC_GOT_TLSLD16:
2630 case R_PPC_GOT_TLSLD16_LO:
2631 case R_PPC_GOT_TLSLD16_HI:
2632 case R_PPC_GOT_TLSLD16_HA:
2633 htab->tlsld_got.refcount += 1;
2634 tls_type = TLS_TLS | TLS_LD;
2637 case R_PPC_GOT_TLSGD16:
2638 case R_PPC_GOT_TLSGD16_LO:
2639 case R_PPC_GOT_TLSGD16_HI:
2640 case R_PPC_GOT_TLSGD16_HA:
2641 tls_type = TLS_TLS | TLS_GD;
2644 case R_PPC_GOT_TPREL16:
2645 case R_PPC_GOT_TPREL16_LO:
2646 case R_PPC_GOT_TPREL16_HI:
2647 case R_PPC_GOT_TPREL16_HA:
2649 info->flags |= DF_STATIC_TLS;
2650 tls_type = TLS_TLS | TLS_TPREL;
2653 case R_PPC_GOT_DTPREL16:
2654 case R_PPC_GOT_DTPREL16_LO:
2655 case R_PPC_GOT_DTPREL16_HI:
2656 case R_PPC_GOT_DTPREL16_HA:
2657 tls_type = TLS_TLS | TLS_DTPREL;
2659 sec->has_tls_reloc = 1;
2662 /* GOT16 relocations */
2664 case R_PPC_GOT16_LO:
2665 case R_PPC_GOT16_HI:
2666 case R_PPC_GOT16_HA:
2667 /* This symbol requires a global offset table entry. */
2668 if (htab->got == NULL)
2670 if (htab->elf.dynobj == NULL)
2671 htab->elf.dynobj = abfd;
2672 if (!ppc_elf_create_got (htab->elf.dynobj, info))
2677 h->got.refcount += 1;
2678 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
2681 /* This is a global offset table entry for a local symbol. */
2682 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
2686 /* Indirect .sdata relocation. */
2687 case R_PPC_EMB_SDAI16:
2690 bad_shared_reloc (abfd, r_type);
2693 if (htab->sdata[0].section == NULL
2694 && !ppc_elf_create_linker_section (abfd, info, 0,
2697 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
2702 /* Indirect .sdata2 relocation. */
2703 case R_PPC_EMB_SDA2I16:
2706 bad_shared_reloc (abfd, r_type);
2709 if (htab->sdata[1].section == NULL
2710 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
2713 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
2718 case R_PPC_SDAREL16:
2719 case R_PPC_EMB_SDA2REL:
2720 case R_PPC_EMB_SDA21:
2721 case R_PPC_EMB_RELSDA:
2722 case R_PPC_EMB_NADDR32:
2723 case R_PPC_EMB_NADDR16:
2724 case R_PPC_EMB_NADDR16_LO:
2725 case R_PPC_EMB_NADDR16_HI:
2726 case R_PPC_EMB_NADDR16_HA:
2729 bad_shared_reloc (abfd, r_type);
2735 case R_PPC_PLTREL24:
2736 case R_PPC_PLTREL32:
2737 case R_PPC_PLT16_LO:
2738 case R_PPC_PLT16_HI:
2739 case R_PPC_PLT16_HA:
2741 fprintf (stderr, "Reloc requires a PLT entry\n");
2743 /* This symbol requires a procedure linkage table entry. We
2744 actually build the entry in finish_dynamic_symbol,
2745 because this might be a case of linking PIC code without
2746 linking in any dynamic objects, in which case we don't
2747 need to generate a procedure linkage table after all. */
2751 /* It does not make sense to have a procedure linkage
2752 table entry for a local symbol. */
2753 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
2757 (long) rel->r_offset,
2758 ppc_elf_howto_table[r_type]->name);
2759 bfd_set_error (bfd_error_bad_value);
2767 /* The following relocations don't need to propagate the
2768 relocation if linking a shared object since they are
2769 section relative. */
2771 case R_PPC_SECTOFF_LO:
2772 case R_PPC_SECTOFF_HI:
2773 case R_PPC_SECTOFF_HA:
2774 case R_PPC_DTPREL16:
2775 case R_PPC_DTPREL16_LO:
2776 case R_PPC_DTPREL16_HI:
2777 case R_PPC_DTPREL16_HA:
2781 /* This are just markers. */
2783 case R_PPC_EMB_MRKREF:
2788 /* These should only appear in dynamic objects. */
2790 case R_PPC_GLOB_DAT:
2791 case R_PPC_JMP_SLOT:
2792 case R_PPC_RELATIVE:
2795 /* These aren't handled yet. We'll report an error later. */
2797 case R_PPC_EMB_RELSEC16:
2798 case R_PPC_EMB_RELST_LO:
2799 case R_PPC_EMB_RELST_HI:
2800 case R_PPC_EMB_RELST_HA:
2801 case R_PPC_EMB_BIT_FLD:
2804 /* This refers only to functions defined in the shared library. */
2805 case R_PPC_LOCAL24PC:
2808 /* This relocation describes the C++ object vtable hierarchy.
2809 Reconstruct it for later use during GC. */
2810 case R_PPC_GNU_VTINHERIT:
2811 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2815 /* This relocation describes which C++ vtable entries are actually
2816 used. Record for later use during GC. */
2817 case R_PPC_GNU_VTENTRY:
2818 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2822 /* We shouldn't really be seeing these. */
2825 info->flags |= DF_STATIC_TLS;
2829 case R_PPC_DTPMOD32:
2830 case R_PPC_DTPREL32:
2834 case R_PPC_TPREL16_LO:
2835 case R_PPC_TPREL16_HI:
2836 case R_PPC_TPREL16_HA:
2838 info->flags |= DF_STATIC_TLS;
2841 /* When creating a shared object, we must copy these
2842 relocs into the output file. We create a reloc
2843 section in dynobj and make room for the reloc. */
2846 case R_PPC_REL14_BRTAKEN:
2847 case R_PPC_REL14_BRNTAKEN:
2850 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2857 case R_PPC_ADDR16_LO:
2858 case R_PPC_ADDR16_HI:
2859 case R_PPC_ADDR16_HA:
2861 case R_PPC_ADDR14_BRTAKEN:
2862 case R_PPC_ADDR14_BRNTAKEN:
2865 if (h != NULL && !info->shared)
2867 /* We may need a plt entry if the symbol turns out to be
2868 a function defined in a dynamic object. */
2871 /* We may need a copy reloc too. */
2876 /* If we are creating a shared library, and this is a reloc
2877 against a global symbol, or a non PC relative reloc
2878 against a local symbol, then we need to copy the reloc
2879 into the shared library. However, if we are linking with
2880 -Bsymbolic, we do not need to copy a reloc against a
2881 global symbol which is defined in an object we are
2882 including in the link (i.e., DEF_REGULAR is set). At
2883 this point we have not seen all the input files, so it is
2884 possible that DEF_REGULAR is not set now but will be set
2885 later (it is never cleared). In case of a weak definition,
2886 DEF_REGULAR may be cleared later by a strong definition in
2887 a shared library. We account for that possibility below by
2888 storing information in the dyn_relocs field of the hash
2889 table entry. A similar situation occurs when creating
2890 shared libraries and symbol visibility changes render the
2893 If on the other hand, we are creating an executable, we
2894 may need to keep relocations for symbols satisfied by a
2895 dynamic library if we manage to avoid copy relocs for the
2898 && (MUST_BE_DYN_RELOC (r_type)
2900 && (! info->symbolic
2901 || h->root.type == bfd_link_hash_defweak
2902 || !h->def_regular))))
2903 || (ELIMINATE_COPY_RELOCS
2905 && (sec->flags & SEC_ALLOC) != 0
2907 && (h->root.type == bfd_link_hash_defweak
2908 || !h->def_regular)))
2910 struct ppc_elf_dyn_relocs *p;
2911 struct ppc_elf_dyn_relocs **head;
2915 "ppc_elf_check_relocs needs to "
2916 "create relocation for %s\n",
2917 (h && h->root.root.string
2918 ? h->root.root.string : "<unknown>"));
2924 name = (bfd_elf_string_from_elf_section
2926 elf_elfheader (abfd)->e_shstrndx,
2927 elf_section_data (sec)->rel_hdr.sh_name));
2931 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
2932 && strcmp (bfd_get_section_name (abfd, sec),
2935 if (htab->elf.dynobj == NULL)
2936 htab->elf.dynobj = abfd;
2937 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
2942 sreloc = bfd_make_section (htab->elf.dynobj, name);
2943 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2944 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2945 if ((sec->flags & SEC_ALLOC) != 0)
2946 flags |= SEC_ALLOC | SEC_LOAD;
2948 || ! bfd_set_section_flags (htab->elf.dynobj,
2950 || ! bfd_set_section_alignment (htab->elf.dynobj,
2954 elf_section_data (sec)->sreloc = sreloc;
2957 /* If this is a global symbol, we count the number of
2958 relocations we need for this symbol. */
2961 head = &ppc_elf_hash_entry (h)->dyn_relocs;
2965 /* Track dynamic relocs needed for local syms too.
2966 We really need local syms available to do this
2970 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
2975 head = ((struct ppc_elf_dyn_relocs **)
2976 &elf_section_data (s)->local_dynrel);
2980 if (p == NULL || p->sec != sec)
2982 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
2993 if (!MUST_BE_DYN_RELOC (r_type))
3004 /* Merge backend specific data from an object file to the output
3005 object file when linking. */
3008 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3014 if (!is_ppc_elf_target (ibfd->xvec)
3015 || !is_ppc_elf_target (obfd->xvec))
3018 /* Check if we have the same endianess. */
3019 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3022 new_flags = elf_elfheader (ibfd)->e_flags;
3023 old_flags = elf_elfheader (obfd)->e_flags;
3024 if (!elf_flags_init (obfd))
3026 /* First call, no flags set. */
3027 elf_flags_init (obfd) = TRUE;
3028 elf_elfheader (obfd)->e_flags = new_flags;
3031 /* Compatible flags are ok. */
3032 else if (new_flags == old_flags)
3035 /* Incompatible flags. */
3038 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3039 to be linked with either. */
3041 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3042 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3045 (*_bfd_error_handler)
3046 (_("%B: compiled with -mrelocatable and linked with "
3047 "modules compiled normally"), ibfd);
3049 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3050 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3053 (*_bfd_error_handler)
3054 (_("%B: compiled normally and linked with "
3055 "modules compiled with -mrelocatable"), ibfd);
3058 /* The output is -mrelocatable-lib iff both the input files are. */
3059 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3060 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3062 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3063 but each input file is either -mrelocatable or -mrelocatable-lib. */
3064 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3065 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3066 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3067 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3069 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3070 any module uses it. */
3071 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3073 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3074 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3076 /* Warn about any other mismatches. */
3077 if (new_flags != old_flags)
3080 (*_bfd_error_handler)
3081 (_("%B: uses different e_flags (0x%lx) fields "
3082 "than previous modules (0x%lx)"),
3083 ibfd, (long) new_flags, (long) old_flags);
3088 bfd_set_error (bfd_error_bad_value);
3096 /* Return the section that should be marked against GC for a given
3100 ppc_elf_gc_mark_hook (asection *sec,
3101 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3102 Elf_Internal_Rela *rel,
3103 struct elf_link_hash_entry *h,
3104 Elf_Internal_Sym *sym)
3108 switch (ELF32_R_TYPE (rel->r_info))
3110 case R_PPC_GNU_VTINHERIT:
3111 case R_PPC_GNU_VTENTRY:
3115 switch (h->root.type)
3117 case bfd_link_hash_defined:
3118 case bfd_link_hash_defweak:
3119 return h->root.u.def.section;
3121 case bfd_link_hash_common:
3122 return h->root.u.c.p->section;
3130 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3135 /* Update the got, plt and dynamic reloc reference counts for the
3136 section being removed. */
3139 ppc_elf_gc_sweep_hook (bfd *abfd,
3140 struct bfd_link_info *info,
3142 const Elf_Internal_Rela *relocs)
3144 struct ppc_elf_link_hash_table *htab;
3145 Elf_Internal_Shdr *symtab_hdr;
3146 struct elf_link_hash_entry **sym_hashes;
3147 bfd_signed_vma *local_got_refcounts;
3148 const Elf_Internal_Rela *rel, *relend;
3150 elf_section_data (sec)->local_dynrel = NULL;
3152 htab = ppc_elf_hash_table (info);
3153 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3154 sym_hashes = elf_sym_hashes (abfd);
3155 local_got_refcounts = elf_local_got_refcounts (abfd);
3157 relend = relocs + sec->reloc_count;
3158 for (rel = relocs; rel < relend; rel++)
3160 unsigned long r_symndx;
3161 enum elf_ppc_reloc_type r_type;
3162 struct elf_link_hash_entry *h = NULL;
3164 r_symndx = ELF32_R_SYM (rel->r_info);
3165 if (r_symndx >= symtab_hdr->sh_info)
3167 struct ppc_elf_dyn_relocs **pp, *p;
3168 struct ppc_elf_link_hash_entry *eh;
3170 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3171 while (h->root.type == bfd_link_hash_indirect
3172 || h->root.type == bfd_link_hash_warning)
3173 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3174 eh = (struct ppc_elf_link_hash_entry *) h;
3176 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3179 /* Everything must go for SEC. */
3185 r_type = ELF32_R_TYPE (rel->r_info);
3188 case R_PPC_GOT_TLSLD16:
3189 case R_PPC_GOT_TLSLD16_LO:
3190 case R_PPC_GOT_TLSLD16_HI:
3191 case R_PPC_GOT_TLSLD16_HA:
3192 htab->tlsld_got.refcount -= 1;
3195 case R_PPC_GOT_TLSGD16:
3196 case R_PPC_GOT_TLSGD16_LO:
3197 case R_PPC_GOT_TLSGD16_HI:
3198 case R_PPC_GOT_TLSGD16_HA:
3199 case R_PPC_GOT_TPREL16:
3200 case R_PPC_GOT_TPREL16_LO:
3201 case R_PPC_GOT_TPREL16_HI:
3202 case R_PPC_GOT_TPREL16_HA:
3203 case R_PPC_GOT_DTPREL16:
3204 case R_PPC_GOT_DTPREL16_LO:
3205 case R_PPC_GOT_DTPREL16_HI:
3206 case R_PPC_GOT_DTPREL16_HA:
3208 case R_PPC_GOT16_LO:
3209 case R_PPC_GOT16_HI:
3210 case R_PPC_GOT16_HA:
3213 if (h->got.refcount > 0)
3216 else if (local_got_refcounts != NULL)
3218 if (local_got_refcounts[r_symndx] > 0)
3219 local_got_refcounts[r_symndx]--;
3225 case R_PPC_REL14_BRTAKEN:
3226 case R_PPC_REL14_BRNTAKEN:
3229 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3236 case R_PPC_ADDR16_LO:
3237 case R_PPC_ADDR16_HI:
3238 case R_PPC_ADDR16_HA:
3240 case R_PPC_ADDR14_BRTAKEN:
3241 case R_PPC_ADDR14_BRNTAKEN:
3245 case R_PPC_PLTREL24:
3246 case R_PPC_PLT16_LO:
3247 case R_PPC_PLT16_HI:
3248 case R_PPC_PLT16_HA:
3251 if (h->plt.refcount > 0)
3263 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3266 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3268 struct ppc_elf_link_hash_table *htab;
3270 htab = ppc_elf_hash_table (info);
3271 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3272 FALSE, FALSE, TRUE);
3274 return _bfd_elf_tls_setup (obfd, info);
3277 /* Run through all the TLS relocs looking for optimization
3281 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3282 struct bfd_link_info *info)
3286 struct ppc_elf_link_hash_table *htab;
3288 if (info->relocatable || info->shared)
3291 htab = ppc_elf_hash_table (info);
3292 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3294 Elf_Internal_Sym *locsyms = NULL;
3295 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3297 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3298 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3300 Elf_Internal_Rela *relstart, *rel, *relend;
3301 int expecting_tls_get_addr;
3303 /* Read the relocations. */
3304 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3306 if (relstart == NULL)
3309 expecting_tls_get_addr = 0;
3310 relend = relstart + sec->reloc_count;
3311 for (rel = relstart; rel < relend; rel++)
3313 enum elf_ppc_reloc_type r_type;
3314 unsigned long r_symndx;
3315 struct elf_link_hash_entry *h = NULL;
3317 char tls_set, tls_clear;
3318 bfd_boolean is_local;
3320 r_symndx = ELF32_R_SYM (rel->r_info);
3321 if (r_symndx >= symtab_hdr->sh_info)
3323 struct elf_link_hash_entry **sym_hashes;
3325 sym_hashes = elf_sym_hashes (ibfd);
3326 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3327 while (h->root.type == bfd_link_hash_indirect
3328 || h->root.type == bfd_link_hash_warning)
3329 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3337 r_type = ELF32_R_TYPE (rel->r_info);
3340 case R_PPC_GOT_TLSLD16:
3341 case R_PPC_GOT_TLSLD16_LO:
3342 case R_PPC_GOT_TLSLD16_HI:
3343 case R_PPC_GOT_TLSLD16_HA:
3344 /* These relocs should never be against a symbol
3345 defined in a shared lib. Leave them alone if
3346 that turns out to be the case. */
3347 expecting_tls_get_addr = 0;
3348 htab->tlsld_got.refcount -= 1;
3355 expecting_tls_get_addr = 1;
3358 case R_PPC_GOT_TLSGD16:
3359 case R_PPC_GOT_TLSGD16_LO:
3360 case R_PPC_GOT_TLSGD16_HI:
3361 case R_PPC_GOT_TLSGD16_HA:
3367 tls_set = TLS_TLS | TLS_TPRELGD;
3369 expecting_tls_get_addr = 1;
3372 case R_PPC_GOT_TPREL16:
3373 case R_PPC_GOT_TPREL16_LO:
3374 case R_PPC_GOT_TPREL16_HI:
3375 case R_PPC_GOT_TPREL16_HA:
3376 expecting_tls_get_addr = 0;
3381 tls_clear = TLS_TPREL;
3388 case R_PPC_REL14_BRTAKEN:
3389 case R_PPC_REL14_BRNTAKEN:
3391 if (expecting_tls_get_addr
3393 && h == htab->tls_get_addr)
3395 if (h->plt.refcount > 0)
3396 h->plt.refcount -= 1;
3398 expecting_tls_get_addr = 0;
3402 expecting_tls_get_addr = 0;
3410 /* We managed to get rid of a got entry. */
3411 if (h->got.refcount > 0)
3412 h->got.refcount -= 1;
3414 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3418 Elf_Internal_Sym *sym;
3419 bfd_signed_vma *lgot_refs;
3422 if (locsyms == NULL)
3424 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3425 if (locsyms == NULL)
3426 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3427 symtab_hdr->sh_info,
3428 0, NULL, NULL, NULL);
3429 if (locsyms == NULL)
3431 if (elf_section_data (sec)->relocs != relstart)
3436 sym = locsyms + r_symndx;
3437 lgot_refs = elf_local_got_refcounts (ibfd);
3438 if (lgot_refs == NULL)
3442 /* We managed to get rid of a got entry. */
3443 if (lgot_refs[r_symndx] > 0)
3444 lgot_refs[r_symndx] -= 1;
3446 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
3447 tls_mask = &lgot_masks[r_symndx];
3450 *tls_mask |= tls_set;
3451 *tls_mask &= ~tls_clear;
3454 if (elf_section_data (sec)->relocs != relstart)
3459 && (symtab_hdr->contents != (unsigned char *) locsyms))
3461 if (!info->keep_memory)
3464 symtab_hdr->contents = (unsigned char *) locsyms;
3470 /* Adjust a symbol defined by a dynamic object and referenced by a
3471 regular object. The current definition is in some section of the
3472 dynamic object, but we're not including those sections. We have to
3473 change the definition to something the rest of the link can
3477 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
3478 struct elf_link_hash_entry *h)
3480 struct ppc_elf_link_hash_table *htab;
3482 unsigned int power_of_two;
3485 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
3486 h->root.root.string);
3489 /* Make sure we know what is going on here. */
3490 htab = ppc_elf_hash_table (info);
3491 BFD_ASSERT (htab->elf.dynobj != NULL
3493 || h->u.weakdef != NULL
3496 && !h->def_regular)));
3498 /* Deal with function syms. */
3499 if (h->type == STT_FUNC
3502 /* Clear procedure linkage table information for any symbol that
3503 won't need a .plt entry. */
3504 if (h->plt.refcount <= 0
3505 || SYMBOL_CALLS_LOCAL (info, h)
3506 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3507 && h->root.type == bfd_link_hash_undefweak))
3509 /* A PLT entry is not required/allowed when:
3511 1. We are not using ld.so; because then the PLT entry
3512 can't be set up, so we can't use one. In this case,
3513 ppc_elf_adjust_dynamic_symbol won't even be called.
3515 2. GC has rendered the entry unused.
3517 3. We know for certain that a call to this symbol
3518 will go to this object, or will remain undefined. */
3519 h->plt.offset = (bfd_vma) -1;
3525 h->plt.offset = (bfd_vma) -1;
3527 /* If this is a weak symbol, and there is a real definition, the
3528 processor independent code will have arranged for us to see the
3529 real definition first, and we can just use the same value. */
3530 if (h->u.weakdef != NULL)
3532 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3533 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3534 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3535 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3536 if (ELIMINATE_COPY_RELOCS)
3537 h->non_got_ref = h->u.weakdef->non_got_ref;
3541 /* This is a reference to a symbol defined by a dynamic object which
3542 is not a function. */
3544 /* If we are creating a shared library, we must presume that the
3545 only references to the symbol are via the global offset table.
3546 For such cases we need not do anything here; the relocations will
3547 be handled correctly by relocate_section. */
3551 /* If there are no references to this symbol that do not use the
3552 GOT, we don't need to generate a copy reloc. */
3553 if (!h->non_got_ref)
3556 if (ELIMINATE_COPY_RELOCS)
3558 struct ppc_elf_dyn_relocs *p;
3559 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3561 s = p->sec->output_section;
3562 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3566 /* If we didn't find any dynamic relocs in read-only sections, then
3567 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
3575 /* We must allocate the symbol in our .dynbss section, which will
3576 become part of the .bss section of the executable. There will be
3577 an entry for this symbol in the .dynsym section. The dynamic
3578 object will contain position independent code, so all references
3579 from the dynamic object to this symbol will go through the global
3580 offset table. The dynamic linker will use the .dynsym entry to
3581 determine the address it must put in the global offset table, so
3582 both the dynamic object and the regular object will refer to the
3583 same memory location for the variable.
3585 Of course, if the symbol is sufficiently small, we must instead
3586 allocate it in .sbss. FIXME: It would be better to do this if and
3587 only if there were actually SDAREL relocs for that symbol. */
3589 if (h->size <= elf_gp_size (htab->elf.dynobj))
3593 BFD_ASSERT (s != NULL);
3595 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
3596 copy the initial value out of the dynamic object and into the
3597 runtime process image. We need to remember the offset into the
3598 .rela.bss section we are going to use. */
3599 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3603 if (h->size <= elf_gp_size (htab->elf.dynobj))
3604 srel = htab->relsbss;
3606 srel = htab->relbss;
3607 BFD_ASSERT (srel != NULL);
3608 srel->size += sizeof (Elf32_External_Rela);
3612 /* We need to figure out the alignment required for this symbol. I
3613 have no idea how ELF linkers handle this. */
3614 power_of_two = bfd_log2 (h->size);
3615 if (power_of_two > 4)
3618 /* Apply the required alignment. */
3619 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
3620 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
3622 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
3626 /* Define the symbol as being at this point in the section. */
3627 h->root.u.def.section = s;
3628 h->root.u.def.value = s->size;
3630 /* Increment the section size to make room for the symbol. */
3636 /* Allocate space in associated reloc sections for dynamic relocs. */
3639 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3641 struct bfd_link_info *info = inf;
3642 struct ppc_elf_link_hash_entry *eh;
3643 struct ppc_elf_link_hash_table *htab;
3644 struct ppc_elf_dyn_relocs *p;
3646 if (h->root.type == bfd_link_hash_indirect)
3649 if (h->root.type == bfd_link_hash_warning)
3650 /* When warning symbols are created, they **replace** the "real"
3651 entry in the hash table, thus we never get to see the real
3652 symbol in a hash traversal. So look at it now. */
3653 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3655 htab = ppc_elf_hash_table (info);
3656 if (htab->elf.dynamic_sections_created
3657 && h->plt.refcount > 0)
3659 /* Make sure this symbol is output as a dynamic symbol. */
3660 if (h->dynindx == -1
3661 && !h->forced_local)
3663 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3668 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3670 asection *s = htab->plt;
3672 /* If this is the first .plt entry, make room for the special
3675 s->size += PLT_INITIAL_ENTRY_SIZE;
3677 /* The PowerPC PLT is actually composed of two parts, the
3678 first part is 2 words (for a load and a jump), and then
3679 there is a remaining word available at the end. */
3680 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
3682 * ((s->size - PLT_INITIAL_ENTRY_SIZE)
3683 / PLT_ENTRY_SIZE)));
3685 /* If this symbol is not defined in a regular file, and we
3686 are not generating a shared library, then set the symbol
3687 to this location in the .plt. This is required to make
3688 function pointers compare as equal between the normal
3689 executable and the shared library. */
3693 h->root.u.def.section = s;
3694 h->root.u.def.value = h->plt.offset;
3697 /* Make room for this entry. After the 8192nd entry, room
3698 for two entries is allocated. */
3699 s->size += PLT_ENTRY_SIZE;
3700 if ((s->size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
3701 > PLT_NUM_SINGLE_ENTRIES)
3702 s->size += PLT_ENTRY_SIZE;
3704 /* We also need to make an entry in the .rela.plt section. */
3705 htab->relplt->size += sizeof (Elf32_External_Rela);
3709 h->plt.offset = (bfd_vma) -1;
3715 h->plt.offset = (bfd_vma) -1;
3719 eh = (struct ppc_elf_link_hash_entry *) h;
3720 if (eh->elf.got.refcount > 0)
3722 /* Make sure this symbol is output as a dynamic symbol. */
3723 if (eh->elf.dynindx == -1
3724 && !eh->elf.forced_local)
3726 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
3730 if (eh->tls_mask == (TLS_TLS | TLS_LD)
3731 && !eh->elf.def_dynamic)
3732 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
3733 eh->elf.got.offset = (bfd_vma) -1;
3737 eh->elf.got.offset = htab->got->size;
3738 if ((eh->tls_mask & TLS_TLS) != 0)
3740 if ((eh->tls_mask & TLS_LD) != 0)
3741 htab->got->size += 8;
3742 if ((eh->tls_mask & TLS_GD) != 0)
3743 htab->got->size += 8;
3744 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
3745 htab->got->size += 4;
3746 if ((eh->tls_mask & TLS_DTPREL) != 0)
3747 htab->got->size += 4;
3750 htab->got->size += 4;
3751 dyn = htab->elf.dynamic_sections_created;
3753 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
3754 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
3755 || eh->elf.root.type != bfd_link_hash_undefweak))
3757 /* All the entries we allocated need relocs. */
3759 += ((htab->got->size - eh->elf.got.offset) / 4
3760 * sizeof (Elf32_External_Rela));
3761 /* Except LD only needs one. */
3762 if ((eh->tls_mask & TLS_LD) != 0)
3763 htab->relgot->size -= sizeof (Elf32_External_Rela);
3768 eh->elf.got.offset = (bfd_vma) -1;
3770 if (eh->dyn_relocs == NULL)
3773 /* In the shared -Bsymbolic case, discard space allocated for
3774 dynamic pc-relative relocs against symbols which turn out to be
3775 defined in regular objects. For the normal shared case, discard
3776 space for relocs that have become local due to symbol visibility
3781 /* Relocs that use pc_count are those that appear on a call insn,
3782 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
3783 generated via assembly. We want calls to protected symbols to
3784 resolve directly to the function rather than going via the plt.
3785 If people want function pointer comparisons to work as expected
3786 then they should avoid writing weird assembly. */
3787 if (SYMBOL_CALLS_LOCAL (info, h))
3789 struct ppc_elf_dyn_relocs **pp;
3791 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3793 p->count -= p->pc_count;
3802 /* Also discard relocs on undefined weak syms with non-default
3804 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3805 && h->root.type == bfd_link_hash_undefweak)
3806 eh->dyn_relocs = NULL;
3808 /* Make sure undefined weak symbols are output as a dynamic symbol
3811 && eh->dyn_relocs != NULL
3813 && h->root.type == bfd_link_hash_undefweak
3814 && !h->forced_local)
3816 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3820 else if (ELIMINATE_COPY_RELOCS)
3822 /* For the non-shared case, discard space for relocs against
3823 symbols which turn out to need copy relocs or are not
3830 /* Make sure this symbol is output as a dynamic symbol.
3831 Undefined weak syms won't yet be marked as dynamic. */
3832 if (h->dynindx == -1
3833 && !h->forced_local)
3835 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3839 /* If that succeeded, we know we'll be keeping all the
3841 if (h->dynindx != -1)
3845 eh->dyn_relocs = NULL;
3850 /* Finally, allocate space. */
3851 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3853 asection *sreloc = elf_section_data (p->sec)->sreloc;
3854 sreloc->size += p->count * sizeof (Elf32_External_Rela);
3860 /* Find any dynamic relocs that apply to read-only sections. */
3863 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
3865 struct ppc_elf_dyn_relocs *p;
3867 if (h->root.type == bfd_link_hash_indirect)
3870 if (h->root.type == bfd_link_hash_warning)
3871 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3873 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3875 asection *s = p->sec->output_section;
3878 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
3879 == (SEC_READONLY | SEC_ALLOC)))
3881 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
3883 /* Not an error, just cut short the traversal. */
3890 /* Set the sizes of the dynamic sections. */
3893 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3894 struct bfd_link_info *info)
3896 struct ppc_elf_link_hash_table *htab;
3902 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
3905 htab = ppc_elf_hash_table (info);
3906 BFD_ASSERT (htab->elf.dynobj != NULL);
3908 if (elf_hash_table (info)->dynamic_sections_created)
3910 /* Set the contents of the .interp section to the interpreter. */
3911 if (info->executable)
3913 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
3914 BFD_ASSERT (s != NULL);
3915 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3916 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3920 if (htab->tlsld_got.refcount > 0)
3922 htab->tlsld_got.offset = htab->got->size;
3923 htab->got->size += 8;
3925 htab->relgot->size += sizeof (Elf32_External_Rela);
3928 htab->tlsld_got.offset = (bfd_vma) -1;
3930 /* Set up .got offsets for local syms, and space for local dynamic
3932 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3934 bfd_signed_vma *local_got;
3935 bfd_signed_vma *end_local_got;
3937 bfd_size_type locsymcount;
3938 Elf_Internal_Shdr *symtab_hdr;
3941 if (!is_ppc_elf_target (ibfd->xvec))
3944 for (s = ibfd->sections; s != NULL; s = s->next)
3946 struct ppc_elf_dyn_relocs *p;
3948 for (p = ((struct ppc_elf_dyn_relocs *)
3949 elf_section_data (s)->local_dynrel);
3953 if (!bfd_is_abs_section (p->sec)
3954 && bfd_is_abs_section (p->sec->output_section))
3956 /* Input section has been discarded, either because
3957 it is a copy of a linkonce section or due to
3958 linker script /DISCARD/, so we'll be discarding
3961 else if (p->count != 0)
3963 elf_section_data (p->sec)->sreloc->size
3964 += p->count * sizeof (Elf32_External_Rela);
3965 if ((p->sec->output_section->flags
3966 & (SEC_READONLY | SEC_ALLOC))
3967 == (SEC_READONLY | SEC_ALLOC))
3968 info->flags |= DF_TEXTREL;
3973 local_got = elf_local_got_refcounts (ibfd);
3977 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3978 locsymcount = symtab_hdr->sh_info;
3979 end_local_got = local_got + locsymcount;
3980 lgot_masks = (char *) end_local_got;
3982 srel = htab->relgot;
3983 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3986 if (*lgot_masks == (TLS_TLS | TLS_LD))
3988 /* If just an LD reloc, we'll just use
3989 htab->tlsld_got.offset. */
3990 if (htab->tlsld_got.offset == (bfd_vma) -1)
3992 htab->tlsld_got.offset = s->size;
3995 srel->size += sizeof (Elf32_External_Rela);
3997 *local_got = (bfd_vma) -1;
4001 *local_got = s->size;
4002 if ((*lgot_masks & TLS_TLS) != 0)
4004 if ((*lgot_masks & TLS_GD) != 0)
4006 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4008 if ((*lgot_masks & TLS_DTPREL) != 0)
4014 srel->size += ((s->size - *local_got) / 4
4015 * sizeof (Elf32_External_Rela));
4019 *local_got = (bfd_vma) -1;
4022 /* Allocate space for global sym dynamic relocs. */
4023 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4025 /* We've now determined the sizes of the various dynamic sections.
4026 Allocate memory for them. */
4028 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4030 if ((s->flags & SEC_LINKER_CREATED) == 0)
4037 /* Strip this section if we don't need it; see the
4040 else if (s == htab->sdata[0].section
4041 || s == htab->sdata[1].section)
4043 /* Strip these too. */
4045 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4049 /* If we don't need this section, strip it from the
4050 output file. This is mostly to handle .rela.bss and
4051 .rela.plt. We must create both sections in
4052 create_dynamic_sections, because they must be created
4053 before the linker maps input sections to output
4054 sections. The linker does that before
4055 adjust_dynamic_symbol is called, and it is that
4056 function which decides whether anything needs to go
4057 into these sections. */
4061 /* Remember whether there are any relocation sections. */
4064 /* We use the reloc_count field as a counter if we need
4065 to copy relocs into the output file. */
4071 /* It's not one of our sections, so don't allocate space. */
4077 _bfd_strip_section_from_output (info, s);
4081 if (s == htab->sbss)
4084 /* Allocate memory for the section contents. */
4085 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4086 if (s->contents == NULL)
4090 if (htab->elf.dynamic_sections_created)
4092 /* Add some entries to the .dynamic section. We fill in the
4093 values later, in ppc_elf_finish_dynamic_sections, but we
4094 must add the entries now so that we get the correct size for
4095 the .dynamic section. The DT_DEBUG entry is filled in by the
4096 dynamic linker and used by the debugger. */
4097 #define add_dynamic_entry(TAG, VAL) \
4098 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4100 if (info->executable)
4102 if (!add_dynamic_entry (DT_DEBUG, 0))
4106 if (htab->plt != NULL && htab->plt->size != 0)
4108 if (!add_dynamic_entry (DT_PLTGOT, 0)
4109 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4110 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4111 || !add_dynamic_entry (DT_JMPREL, 0))
4117 if (!add_dynamic_entry (DT_RELA, 0)
4118 || !add_dynamic_entry (DT_RELASZ, 0)
4119 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4123 /* If any dynamic relocs apply to a read-only section, then we
4124 need a DT_TEXTREL entry. */
4125 if ((info->flags & DF_TEXTREL) == 0)
4126 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4129 if ((info->flags & DF_TEXTREL) != 0)
4131 if (!add_dynamic_entry (DT_TEXTREL, 0))
4135 #undef add_dynamic_entry
4140 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4142 static const int shared_stub_entry[] =
4144 0x7c0802a6, /* mflr 0 */
4145 0x429f0005, /* bcl 20, 31, .Lxxx */
4146 0x7d6802a6, /* mflr 11 */
4147 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4148 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4149 0x7c0803a6, /* mtlr 0 */
4150 0x7d6903a6, /* mtctr 11 */
4151 0x4e800420, /* bctr */
4154 static const int stub_entry[] =
4156 0x3d600000, /* lis 11,xxx@ha */
4157 0x396b0000, /* addi 11,11,xxx@l */
4158 0x7d6903a6, /* mtctr 11 */
4159 0x4e800420, /* bctr */
4163 ppc_elf_relax_section (bfd *abfd,
4165 struct bfd_link_info *link_info,
4170 struct one_fixup *next;
4176 Elf_Internal_Shdr *symtab_hdr;
4177 bfd_byte *contents = NULL;
4178 Elf_Internal_Sym *isymbuf = NULL;
4179 Elf_Internal_Rela *internal_relocs = NULL;
4180 Elf_Internal_Rela *irel, *irelend;
4181 struct one_fixup *fixups = NULL;
4182 bfd_boolean changed;
4183 struct ppc_elf_link_hash_table *ppc_info;
4184 bfd_size_type trampoff;
4188 /* Nothing to do if there are no relocations. */
4189 if ((isec->flags & SEC_RELOC) == 0 || isec->reloc_count == 0)
4192 trampoff = (isec->size + 3) & (bfd_vma) -4;
4193 /* Space for a branch around any trampolines. */
4196 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4198 /* Get a copy of the native relocations. */
4199 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
4200 link_info->keep_memory);
4201 if (internal_relocs == NULL)
4204 ppc_info = ppc_elf_hash_table (link_info);
4205 irelend = internal_relocs + isec->reloc_count;
4207 for (irel = internal_relocs; irel < irelend; irel++)
4209 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
4210 bfd_vma symaddr, reladdr, toff, roff;
4212 struct one_fixup *f;
4213 size_t insn_offset = 0;
4214 bfd_vma max_branch_offset, val;
4217 unsigned char sym_type;
4222 case R_PPC_LOCAL24PC:
4223 case R_PPC_PLTREL24:
4224 max_branch_offset = 1 << 25;
4228 case R_PPC_REL14_BRTAKEN:
4229 case R_PPC_REL14_BRNTAKEN:
4230 max_branch_offset = 1 << 15;
4237 /* Get the value of the symbol referred to by the reloc. */
4238 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
4240 /* A local symbol. */
4241 Elf_Internal_Sym *isym;
4243 /* Read this BFD's local symbols. */
4244 if (isymbuf == NULL)
4246 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
4247 if (isymbuf == NULL)
4248 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
4249 symtab_hdr->sh_info, 0,
4254 isym = isymbuf + ELF32_R_SYM (irel->r_info);
4255 if (isym->st_shndx == SHN_UNDEF)
4256 continue; /* We can't do anything with undefined symbols. */
4257 else if (isym->st_shndx == SHN_ABS)
4258 tsec = bfd_abs_section_ptr;
4259 else if (isym->st_shndx == SHN_COMMON)
4260 tsec = bfd_com_section_ptr;
4262 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4264 toff = isym->st_value;
4265 sym_type = ELF_ST_TYPE (isym->st_info);
4269 /* Global symbol handling. */
4271 struct elf_link_hash_entry *h;
4273 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
4274 h = elf_sym_hashes (abfd)[indx];
4276 while (h->root.type == bfd_link_hash_indirect
4277 || h->root.type == bfd_link_hash_warning)
4278 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4280 if (r_type == R_PPC_PLTREL24
4281 && ppc_info->plt != NULL
4282 && h->plt.offset != (bfd_vma) -1)
4284 tsec = ppc_info->plt;
4285 toff = h->plt.offset;
4287 else if (h->root.type == bfd_link_hash_defined
4288 || h->root.type == bfd_link_hash_defweak)
4290 tsec = h->root.u.def.section;
4291 toff = h->root.u.def.value;
4299 /* If the branch and target are in the same section, you have
4300 no hope of adding stubs. We'll error out later should the
4305 /* There probably isn't any reason to handle symbols in
4306 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
4307 attribute for a code section, and we are only looking at
4308 branches. However, implement it correctly here as a
4309 reference for other target relax_section functions. */
4310 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
4312 /* At this stage in linking, no SEC_MERGE symbol has been
4313 adjusted, so all references to such symbols need to be
4314 passed through _bfd_merged_section_offset. (Later, in
4315 relocate_section, all SEC_MERGE symbols *except* for
4316 section symbols have been adjusted.)
4318 gas may reduce relocations against symbols in SEC_MERGE
4319 sections to a relocation against the section symbol when
4320 the original addend was zero. When the reloc is against
4321 a section symbol we should include the addend in the
4322 offset passed to _bfd_merged_section_offset, since the
4323 location of interest is the original symbol. On the
4324 other hand, an access to "sym+addend" where "sym" is not
4325 a section symbol should not include the addend; Such an
4326 access is presumed to be an offset from "sym"; The
4327 location of interest is just "sym". */
4328 if (sym_type == STT_SECTION)
4329 toff += irel->r_addend;
4331 toff = _bfd_merged_section_offset (abfd, &tsec,
4332 elf_section_data (tsec)->sec_info,
4335 if (sym_type != STT_SECTION)
4336 toff += irel->r_addend;
4339 toff += irel->r_addend;
4341 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
4343 roff = irel->r_offset;
4344 reladdr = isec->output_section->vma + isec->output_offset + roff;
4346 /* If the branch is in range, no need to do anything. */
4347 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
4350 /* Look for an existing fixup to this address. */
4351 for (f = fixups; f ; f = f->next)
4352 if (f->tsec == tsec && f->toff == toff)
4358 unsigned long stub_rtype;
4360 val = trampoff - roff;
4361 if (val >= max_branch_offset)
4362 /* Oh dear, we can't reach a trampoline. Don't try to add
4363 one. We'll report an error later. */
4366 if (link_info->shared)
4368 size = 4 * ARRAY_SIZE (shared_stub_entry);
4370 stub_rtype = R_PPC_RELAX32PC;
4374 size = 4 * ARRAY_SIZE (stub_entry);
4376 stub_rtype = R_PPC_RELAX32;
4379 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
4380 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
4382 if (tsec == ppc_info->plt)
4383 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
4385 /* Hijack the old relocation. Since we need two
4386 relocations for this use a "composite" reloc. */
4387 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
4389 irel->r_offset = trampoff + insn_offset;
4391 /* Record the fixup so we don't do it again this section. */
4392 f = bfd_malloc (sizeof (*f));
4396 f->trampoff = trampoff;
4403 val = f->trampoff - roff;
4404 if (val >= max_branch_offset)
4407 /* Nop out the reloc, since we're finalizing things here. */
4408 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
4411 /* Get the section contents. */
4412 if (contents == NULL)
4414 /* Get cached copy if it exists. */
4415 if (elf_section_data (isec)->this_hdr.contents != NULL)
4416 contents = elf_section_data (isec)->this_hdr.contents;
4419 /* Go get them off disk. */
4420 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
4425 /* Fix up the existing branch to hit the trampoline. */
4426 hit_addr = contents + roff;
4430 case R_PPC_LOCAL24PC:
4431 case R_PPC_PLTREL24:
4432 t0 = bfd_get_32 (abfd, hit_addr);
4434 t0 |= val & 0x3fffffc;
4435 bfd_put_32 (abfd, t0, hit_addr);
4439 case R_PPC_REL14_BRTAKEN:
4440 case R_PPC_REL14_BRNTAKEN:
4441 t0 = bfd_get_32 (abfd, hit_addr);
4444 bfd_put_32 (abfd, t0, hit_addr);
4449 /* Write out the trampolines. */
4450 changed = fixups != NULL;
4460 struct one_fixup *f = fixups;
4461 fixups = fixups->next;
4466 contents = bfd_realloc (contents, trampoff);
4467 if (contents == NULL)
4470 isec->size = (isec->size + 3) & (bfd_vma) -4;
4471 /* Branch around the trampolines. */
4472 val = trampoff - isec->size + 0x48000000;
4473 dest = contents + isec->size;
4474 isec->size = trampoff;
4475 bfd_put_32 (abfd, val, dest);
4478 if (link_info->shared)
4480 stub = shared_stub_entry;
4481 size = ARRAY_SIZE (shared_stub_entry);
4486 size = ARRAY_SIZE (stub_entry);
4490 while (dest < contents + trampoff)
4492 bfd_put_32 (abfd, stub[i], dest);
4498 BFD_ASSERT (i == 0);
4502 && symtab_hdr->contents != (unsigned char *) isymbuf)
4504 if (! link_info->keep_memory)
4508 /* Cache the symbols for elf_link_input_bfd. */
4509 symtab_hdr->contents = (unsigned char *) isymbuf;
4513 if (contents != NULL
4514 && elf_section_data (isec)->this_hdr.contents != contents)
4516 if (!changed && !link_info->keep_memory)
4520 /* Cache the section contents for elf_link_input_bfd. */
4521 elf_section_data (isec)->this_hdr.contents = contents;
4525 if (elf_section_data (isec)->relocs != internal_relocs)
4528 free (internal_relocs);
4530 elf_section_data (isec)->relocs = internal_relocs;
4537 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
4539 if (contents != NULL
4540 && elf_section_data (isec)->this_hdr.contents != contents)
4542 if (internal_relocs != NULL
4543 && elf_section_data (isec)->relocs != internal_relocs)
4544 free (internal_relocs);
4548 /* Set _SDA_BASE_, _SDA2_BASE, and sbss start and end syms. They are
4549 set here rather than via PROVIDE in the default linker script,
4550 because using PROVIDE inside an output section statement results in
4551 unnecessary output sections. Using PROVIDE outside an output section
4552 statement runs the risk of section alignment affecting where the
4556 ppc_elf_set_sdata_syms (bfd *obfd, struct bfd_link_info *info)
4558 struct ppc_elf_link_hash_table *htab;
4563 htab = ppc_elf_hash_table (info);
4565 for (i = 0; i < 2; i++)
4567 elf_linker_section_t *lsect = &htab->sdata[i];
4571 s = s->output_section;
4573 s = bfd_get_section_by_name (obfd, lsect->name);
4575 s = bfd_get_section_by_name (obfd, lsect->bss_name);
4579 val = s->vma + 32768;
4580 lsect->sym_val = val;
4582 _bfd_elf_provide_symbol (info, lsect->sym_name, val);
4585 s = bfd_get_section_by_name (obfd, ".sbss");
4589 _bfd_elf_provide_symbol (info, "__sbss_start", val);
4590 _bfd_elf_provide_symbol (info, "___sbss_start", val);
4593 _bfd_elf_provide_symbol (info, "__sbss_end", val);
4594 _bfd_elf_provide_symbol (info, "___sbss_end", val);
4598 /* Fill in the address for a pointer generated in a linker section. */
4601 elf_finish_pointer_linker_section (bfd *input_bfd,
4602 elf_linker_section_t *lsect,
4603 struct elf_link_hash_entry *h,
4605 const Elf_Internal_Rela *rel)
4607 elf_linker_section_pointers_t *linker_section_ptr;
4609 BFD_ASSERT (lsect != NULL);
4613 /* Handle global symbol. */
4614 struct ppc_elf_link_hash_entry *eh;
4616 eh = (struct ppc_elf_link_hash_entry *) h;
4617 BFD_ASSERT (eh->elf.def_regular);
4618 linker_section_ptr = eh->linker_section_pointer;
4622 /* Handle local symbol. */
4623 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
4625 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
4626 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
4629 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
4632 BFD_ASSERT (linker_section_ptr != NULL);
4634 /* Offset will always be a multiple of four, so use the bottom bit
4635 as a "written" flag. */
4636 if ((linker_section_ptr->offset & 1) == 0)
4638 bfd_put_32 (lsect->section->owner,
4639 relocation + linker_section_ptr->addend,
4640 lsect->section->contents + linker_section_ptr->offset);
4641 linker_section_ptr->offset += 1;
4644 relocation = (lsect->section->output_offset
4645 + linker_section_ptr->offset - 1
4650 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
4651 lsect->name, (long) relocation, (long) relocation);
4654 /* Subtract out the addend, because it will get added back in by the normal
4656 return relocation - linker_section_ptr->addend;
4659 /* The RELOCATE_SECTION function is called by the ELF backend linker
4660 to handle the relocations for a section.
4662 The relocs are always passed as Rela structures; if the section
4663 actually uses Rel structures, the r_addend field will always be
4666 This function is responsible for adjust the section contents as
4667 necessary, and (if using Rela relocs and generating a
4668 relocatable output file) adjusting the reloc addend as
4671 This function does not have to worry about setting the reloc
4672 address or the reloc symbol index.
4674 LOCAL_SYMS is a pointer to the swapped in local symbols.
4676 LOCAL_SECTIONS is an array giving the section in the input file
4677 corresponding to the st_shndx field of each local symbol.
4679 The global hash table entry for the global symbols can be found
4680 via elf_sym_hashes (input_bfd).
4682 When generating relocatable output, this function must handle
4683 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
4684 going to be the section symbol corresponding to the output
4685 section, which means that the addend must be adjusted
4689 ppc_elf_relocate_section (bfd *output_bfd,
4690 struct bfd_link_info *info,
4692 asection *input_section,
4694 Elf_Internal_Rela *relocs,
4695 Elf_Internal_Sym *local_syms,
4696 asection **local_sections)
4698 Elf_Internal_Shdr *symtab_hdr;
4699 struct elf_link_hash_entry **sym_hashes;
4700 struct ppc_elf_link_hash_table *htab;
4701 Elf_Internal_Rela *rel;
4702 Elf_Internal_Rela *relend;
4703 Elf_Internal_Rela outrel;
4705 asection *sreloc = NULL;
4706 bfd_vma *local_got_offsets;
4707 bfd_boolean ret = TRUE;
4710 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
4711 "%ld relocations%s",
4712 input_bfd, input_section,
4713 (long) input_section->reloc_count,
4714 (info->relocatable) ? " (relocatable)" : "");
4717 if (info->relocatable)
4720 /* Initialize howto table if not already done. */
4721 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4722 ppc_elf_howto_init ();
4724 htab = ppc_elf_hash_table (info);
4725 local_got_offsets = elf_local_got_offsets (input_bfd);
4726 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4727 sym_hashes = elf_sym_hashes (input_bfd);
4729 relend = relocs + input_section->reloc_count;
4730 for (; rel < relend; rel++)
4732 enum elf_ppc_reloc_type r_type;
4734 bfd_reloc_status_type r;
4735 Elf_Internal_Sym *sym;
4737 struct elf_link_hash_entry *h;
4738 const char *sym_name;
4739 reloc_howto_type *howto;
4740 unsigned long r_symndx;
4742 bfd_vma branch_bit, insn, from;
4743 bfd_boolean unresolved_reloc;
4745 unsigned int tls_type, tls_mask, tls_gd;
4747 r_type = ELF32_R_TYPE (rel->r_info);
4751 unresolved_reloc = FALSE;
4753 r_symndx = ELF32_R_SYM (rel->r_info);
4755 if (r_symndx < symtab_hdr->sh_info)
4757 sym = local_syms + r_symndx;
4758 sec = local_sections[r_symndx];
4759 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym);
4761 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4765 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4766 r_symndx, symtab_hdr, sym_hashes,
4768 unresolved_reloc, warned);
4770 sym_name = h->root.root.string;
4773 /* TLS optimizations. Replace instruction sequences and relocs
4774 based on information we collected in tls_optimize. We edit
4775 RELOCS so that --emit-relocs will output something sensible
4776 for the final instruction stream. */
4779 if (IS_PPC_TLS_RELOC (r_type))
4782 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
4783 else if (local_got_offsets != NULL)
4786 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
4787 tls_mask = lgot_masks[r_symndx];
4791 /* Ensure reloc mapping code below stays sane. */
4792 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
4793 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
4794 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
4795 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
4796 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
4797 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
4798 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
4799 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
4806 case R_PPC_GOT_TPREL16:
4807 case R_PPC_GOT_TPREL16_LO:
4809 && (tls_mask & TLS_TPREL) == 0)
4812 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
4814 insn |= 0x3c020000; /* addis 0,2,0 */
4815 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
4816 r_type = R_PPC_TPREL16_HA;
4817 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4823 && (tls_mask & TLS_TPREL) == 0)
4826 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4827 if ((insn & ((31 << 26) | (31 << 11)))
4828 == ((31 << 26) | (2 << 11)))
4829 rtra = insn & ((1 << 26) - (1 << 16));
4830 else if ((insn & ((31 << 26) | (31 << 16)))
4831 == ((31 << 26) | (2 << 16)))
4832 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
4835 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
4838 else if ((insn & (31 << 1)) == 23 << 1
4839 && ((insn & (31 << 6)) < 14 << 6
4840 || ((insn & (31 << 6)) >= 16 << 6
4841 && (insn & (31 << 6)) < 24 << 6)))
4842 /* load and store indexed -> dform. */
4843 insn = (32 | ((insn >> 6) & 31)) << 26;
4844 else if ((insn & (31 << 1)) == 21 << 1
4845 && (insn & (0x1a << 6)) == 0)
4846 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
4847 insn = (((58 | ((insn >> 6) & 4)) << 26)
4848 | ((insn >> 6) & 1));
4849 else if ((insn & (31 << 1)) == 21 << 1
4850 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
4852 insn = (58 << 26) | 2;
4856 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4857 r_type = R_PPC_TPREL16_LO;
4858 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4859 /* Was PPC_TLS which sits on insn boundary, now
4860 PPC_TPREL16_LO which is at insn+2. */
4865 case R_PPC_GOT_TLSGD16_HI:
4866 case R_PPC_GOT_TLSGD16_HA:
4867 tls_gd = TLS_TPRELGD;
4868 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4872 case R_PPC_GOT_TLSLD16_HI:
4873 case R_PPC_GOT_TLSLD16_HA:
4874 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4877 if ((tls_mask & tls_gd) != 0)
4878 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4879 + R_PPC_GOT_TPREL16);
4882 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
4884 r_type = R_PPC_NONE;
4886 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4890 case R_PPC_GOT_TLSGD16:
4891 case R_PPC_GOT_TLSGD16_LO:
4892 tls_gd = TLS_TPRELGD;
4893 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4894 goto tls_get_addr_check;
4897 case R_PPC_GOT_TLSLD16:
4898 case R_PPC_GOT_TLSLD16_LO:
4899 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4902 if (rel + 1 < relend)
4904 enum elf_ppc_reloc_type r_type2;
4905 unsigned long r_symndx2;
4906 struct elf_link_hash_entry *h2;
4907 bfd_vma insn1, insn2;
4910 /* The next instruction should be a call to
4911 __tls_get_addr. Peek at the reloc to be sure. */
4912 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4913 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4914 if (r_symndx2 < symtab_hdr->sh_info
4915 || (r_type2 != R_PPC_REL14
4916 && r_type2 != R_PPC_REL14_BRTAKEN
4917 && r_type2 != R_PPC_REL14_BRNTAKEN
4918 && r_type2 != R_PPC_REL24
4919 && r_type2 != R_PPC_PLTREL24))
4922 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4923 while (h2->root.type == bfd_link_hash_indirect
4924 || h2->root.type == bfd_link_hash_warning)
4925 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
4926 if (h2 == NULL || h2 != htab->tls_get_addr)
4929 /* OK, it checks out. Replace the call. */
4930 offset = rel[1].r_offset;
4931 insn1 = bfd_get_32 (output_bfd,
4932 contents + rel->r_offset - 2);
4933 if ((tls_mask & tls_gd) != 0)
4936 insn1 &= (1 << 26) - 1;
4937 insn1 |= 32 << 26; /* lwz */
4938 insn2 = 0x7c631214; /* add 3,3,2 */
4939 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
4940 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4941 + R_PPC_GOT_TPREL16);
4942 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4947 insn1 = 0x3c620000; /* addis 3,2,0 */
4948 insn2 = 0x38630000; /* addi 3,3,0 */
4951 /* Was an LD reloc. */
4953 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4954 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4956 r_type = R_PPC_TPREL16_HA;
4957 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4958 rel[1].r_info = ELF32_R_INFO (r_symndx,
4960 rel[1].r_offset += 2;
4962 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
4963 bfd_put_32 (output_bfd, insn2, contents + offset);
4966 /* We changed the symbol on an LD reloc. Start over
4967 in order to get h, sym, sec etc. right. */
4976 /* Handle other relocations that tweak non-addend part of insn. */
4983 /* Branch taken prediction relocations. */
4984 case R_PPC_ADDR14_BRTAKEN:
4985 case R_PPC_REL14_BRTAKEN:
4986 branch_bit = BRANCH_PREDICT_BIT;
4989 /* Branch not taken prediction relocations. */
4990 case R_PPC_ADDR14_BRNTAKEN:
4991 case R_PPC_REL14_BRNTAKEN:
4992 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4993 insn &= ~BRANCH_PREDICT_BIT;
4996 from = (rel->r_offset
4997 + input_section->output_offset
4998 + input_section->output_section->vma);
5000 /* Invert 'y' bit if not the default. */
5001 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5002 insn ^= BRANCH_PREDICT_BIT;
5004 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5008 addend = rel->r_addend;
5011 if (r_type < R_PPC_max)
5012 howto = ppc_elf_howto_table[r_type];
5016 (*_bfd_error_handler)
5017 (_("%B: unknown relocation type %d for symbol %s"),
5018 input_bfd, (int) r_type, sym_name);
5020 bfd_set_error (bfd_error_bad_value);
5026 case R_PPC_EMB_MRKREF:
5027 case R_PPC_GNU_VTINHERIT:
5028 case R_PPC_GNU_VTENTRY:
5031 /* GOT16 relocations. Like an ADDR16 using the symbol's
5032 address in the GOT as relocation value instead of the
5033 symbol's value itself. Also, create a GOT entry for the
5034 symbol and put the symbol value there. */
5035 case R_PPC_GOT_TLSGD16:
5036 case R_PPC_GOT_TLSGD16_LO:
5037 case R_PPC_GOT_TLSGD16_HI:
5038 case R_PPC_GOT_TLSGD16_HA:
5039 tls_type = TLS_TLS | TLS_GD;
5042 case R_PPC_GOT_TLSLD16:
5043 case R_PPC_GOT_TLSLD16_LO:
5044 case R_PPC_GOT_TLSLD16_HI:
5045 case R_PPC_GOT_TLSLD16_HA:
5046 tls_type = TLS_TLS | TLS_LD;
5049 case R_PPC_GOT_TPREL16:
5050 case R_PPC_GOT_TPREL16_LO:
5051 case R_PPC_GOT_TPREL16_HI:
5052 case R_PPC_GOT_TPREL16_HA:
5053 tls_type = TLS_TLS | TLS_TPREL;
5056 case R_PPC_GOT_DTPREL16:
5057 case R_PPC_GOT_DTPREL16_LO:
5058 case R_PPC_GOT_DTPREL16_HI:
5059 case R_PPC_GOT_DTPREL16_HA:
5060 tls_type = TLS_TLS | TLS_DTPREL;
5064 case R_PPC_GOT16_LO:
5065 case R_PPC_GOT16_HI:
5066 case R_PPC_GOT16_HA:
5069 /* Relocation is to the entry for this symbol in the global
5075 if (htab->got == NULL)
5079 if (tls_type == (TLS_TLS | TLS_LD)
5081 || !h->def_dynamic))
5082 offp = &htab->tlsld_got.offset;
5086 dyn = htab->elf.dynamic_sections_created;
5087 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5089 && SYMBOL_REFERENCES_LOCAL (info, h)))
5090 /* This is actually a static link, or it is a
5091 -Bsymbolic link and the symbol is defined
5092 locally, or the symbol was forced to be local
5093 because of a version file. */
5098 unresolved_reloc = FALSE;
5100 offp = &h->got.offset;
5104 if (local_got_offsets == NULL)
5106 offp = &local_got_offsets[r_symndx];
5109 /* The offset must always be a multiple of 4. We use the
5110 least significant bit to record whether we have already
5111 processed this entry. */
5117 unsigned int tls_m = (tls_mask
5118 & (TLS_LD | TLS_GD | TLS_DTPREL
5119 | TLS_TPREL | TLS_TPRELGD));
5121 if (offp == &htab->tlsld_got.offset)
5127 /* We might have multiple got entries for this sym.
5128 Initialize them all. */
5133 if ((tls_m & TLS_LD) != 0)
5135 tls_ty = TLS_TLS | TLS_LD;
5138 else if ((tls_m & TLS_GD) != 0)
5140 tls_ty = TLS_TLS | TLS_GD;
5143 else if ((tls_m & TLS_DTPREL) != 0)
5145 tls_ty = TLS_TLS | TLS_DTPREL;
5146 tls_m &= ~TLS_DTPREL;
5148 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5150 tls_ty = TLS_TLS | TLS_TPREL;
5154 /* Generate relocs for the dynamic linker. */
5155 if ((info->shared || indx != 0)
5157 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5158 || h->root.type != bfd_link_hash_undefweak))
5160 outrel.r_offset = (htab->got->output_section->vma
5161 + htab->got->output_offset
5163 outrel.r_addend = 0;
5164 if (tls_ty & (TLS_LD | TLS_GD))
5166 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5167 if (tls_ty == (TLS_TLS | TLS_GD))
5169 loc = htab->relgot->contents;
5170 loc += (htab->relgot->reloc_count++
5171 * sizeof (Elf32_External_Rela));
5172 bfd_elf32_swap_reloca_out (output_bfd,
5174 outrel.r_offset += 4;
5176 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5179 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5180 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5181 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5182 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5184 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5186 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5189 outrel.r_addend += relocation;
5190 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5191 outrel.r_addend -= htab->elf.tls_sec->vma;
5193 loc = htab->relgot->contents;
5194 loc += (htab->relgot->reloc_count++
5195 * sizeof (Elf32_External_Rela));
5196 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5199 /* Init the .got section contents if we're not
5200 emitting a reloc. */
5203 bfd_vma value = relocation;
5205 if (tls_ty == (TLS_TLS | TLS_LD))
5207 else if (tls_ty != 0)
5209 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
5210 if (tls_ty == (TLS_TLS | TLS_TPREL))
5211 value += DTP_OFFSET - TP_OFFSET;
5213 if (tls_ty == (TLS_TLS | TLS_GD))
5215 bfd_put_32 (output_bfd, value,
5216 htab->got->contents + off + 4);
5220 bfd_put_32 (output_bfd, value,
5221 htab->got->contents + off);
5225 if (tls_ty & (TLS_LD | TLS_GD))
5234 if (off >= (bfd_vma) -2)
5237 if ((tls_type & TLS_TLS) != 0)
5239 if (tls_type != (TLS_TLS | TLS_LD))
5241 if ((tls_mask & TLS_LD) != 0
5243 || !h->def_dynamic))
5245 if (tls_type != (TLS_TLS | TLS_GD))
5247 if ((tls_mask & TLS_GD) != 0)
5249 if (tls_type != (TLS_TLS | TLS_DTPREL))
5251 if ((tls_mask & TLS_DTPREL) != 0)
5258 relocation = htab->got->output_offset + off - 4;
5260 /* Addends on got relocations don't make much sense.
5261 x+off@got is actually x@got+off, and since the got is
5262 generated by a hash table traversal, the value in the
5263 got at entry m+n bears little relation to the entry m. */
5265 (*_bfd_error_handler)
5266 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
5269 (long) rel->r_offset,
5275 /* Relocations that need no special processing. */
5276 case R_PPC_LOCAL24PC:
5277 /* It makes no sense to point a local relocation
5278 at a symbol not in this object. */
5279 if (unresolved_reloc)
5281 if (! (*info->callbacks->undefined_symbol) (info,
5282 h->root.root.string,
5292 case R_PPC_DTPREL16:
5293 case R_PPC_DTPREL16_LO:
5294 case R_PPC_DTPREL16_HI:
5295 case R_PPC_DTPREL16_HA:
5296 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5299 /* Relocations that may need to be propagated if this is a shared
5302 case R_PPC_TPREL16_LO:
5303 case R_PPC_TPREL16_HI:
5304 case R_PPC_TPREL16_HA:
5305 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5306 /* The TPREL16 relocs shouldn't really be used in shared
5307 libs as they will result in DT_TEXTREL being set, but
5308 support them anyway. */
5312 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5315 case R_PPC_DTPREL32:
5316 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5319 case R_PPC_DTPMOD32:
5327 case R_PPC_REL14_BRTAKEN:
5328 case R_PPC_REL14_BRNTAKEN:
5329 /* If these relocations are not to a named symbol, they can be
5330 handled right here, no need to bother the dynamic linker. */
5331 if (SYMBOL_REFERENCES_LOCAL (info, h)
5332 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5336 /* Relocations that always need to be propagated if this is a shared
5341 case R_PPC_ADDR16_LO:
5342 case R_PPC_ADDR16_HI:
5343 case R_PPC_ADDR16_HA:
5345 case R_PPC_ADDR14_BRTAKEN:
5346 case R_PPC_ADDR14_BRNTAKEN:
5349 /* r_symndx will be zero only for relocs against symbols
5350 from removed linkonce sections, or sections discarded by
5359 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5360 || h->root.type != bfd_link_hash_undefweak)
5361 && (MUST_BE_DYN_RELOC (r_type)
5362 || !SYMBOL_CALLS_LOCAL (info, h)))
5363 || (ELIMINATE_COPY_RELOCS
5365 && (input_section->flags & SEC_ALLOC) != 0
5370 && !h->def_regular))
5375 fprintf (stderr, "ppc_elf_relocate_section needs to "
5376 "create relocation for %s\n",
5377 (h && h->root.root.string
5378 ? h->root.root.string : "<unknown>"));
5381 /* When generating a shared object, these relocations
5382 are copied into the output file to be resolved at run
5388 name = (bfd_elf_string_from_elf_section
5390 elf_elfheader (input_bfd)->e_shstrndx,
5391 elf_section_data (input_section)->rel_hdr.sh_name));
5395 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
5396 && strcmp (bfd_get_section_name (input_bfd,
5400 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
5401 BFD_ASSERT (sreloc != NULL);
5407 _bfd_elf_section_offset (output_bfd, info, input_section,
5409 if (outrel.r_offset == (bfd_vma) -1
5410 || outrel.r_offset == (bfd_vma) -2)
5411 skip = (int) outrel.r_offset;
5412 outrel.r_offset += (input_section->output_section->vma
5413 + input_section->output_offset);
5416 memset (&outrel, 0, sizeof outrel);
5417 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
5419 unresolved_reloc = FALSE;
5420 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5421 outrel.r_addend = rel->r_addend;
5425 outrel.r_addend = relocation + rel->r_addend;
5427 if (r_type == R_PPC_ADDR32)
5428 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
5433 if (bfd_is_abs_section (sec))
5435 else if (sec == NULL || sec->owner == NULL)
5437 bfd_set_error (bfd_error_bad_value);
5444 /* We are turning this relocation into one
5445 against a section symbol. It would be
5446 proper to subtract the symbol's value,
5447 osec->vma, from the emitted reloc addend,
5448 but ld.so expects buggy relocs. */
5449 osec = sec->output_section;
5450 indx = elf_section_data (osec)->dynindx;
5451 BFD_ASSERT (indx > 0);
5454 printf ("indx=%d section=%s flags=%08x name=%s\n",
5455 indx, osec->name, osec->flags,
5456 h->root.root.string);
5460 outrel.r_info = ELF32_R_INFO (indx, r_type);
5464 loc = sreloc->contents;
5465 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5466 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5471 /* This reloc will be computed at runtime. We clear the memory
5472 so that it contains predictable value. */
5474 && ((input_section->flags & SEC_ALLOC) != 0
5475 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
5477 relocation = howto->pc_relative ? outrel.r_offset : 0;
5484 case R_PPC_RELAX32PC_PLT:
5485 case R_PPC_RELAX32_PLT:
5486 BFD_ASSERT (h != NULL
5487 && h->plt.offset != (bfd_vma) -1
5488 && htab->plt != NULL);
5490 relocation = (htab->plt->output_section->vma
5491 + htab->plt->output_offset
5493 if (r_type == R_PPC_RELAX32_PLT)
5497 case R_PPC_RELAX32PC:
5498 relocation -= (input_section->output_section->vma
5499 + input_section->output_offset
5500 + rel->r_offset - 4);
5509 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
5510 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
5512 /* We're clearing the bits for R_PPC_ADDR16_HA
5513 and R_PPC_ADDR16_LO here. */
5517 /* t0 is HA, t1 is LO */
5518 relocation += addend;
5519 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
5520 t1 |= relocation & 0xffff;
5522 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
5523 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
5527 /* Indirect .sdata relocation. */
5528 case R_PPC_EMB_SDAI16:
5529 BFD_ASSERT (htab->sdata[0].section != NULL);
5531 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
5532 h, relocation, rel);
5535 /* Indirect .sdata2 relocation. */
5536 case R_PPC_EMB_SDA2I16:
5537 BFD_ASSERT (htab->sdata[1].section != NULL);
5539 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
5540 h, relocation, rel);
5543 /* Handle the TOC16 reloc. We want to use the offset within the .got
5544 section, not the actual VMA. This is appropriate when generating
5545 an embedded ELF object, for which the .got section acts like the
5546 AIX .toc section. */
5547 case R_PPC_TOC16: /* phony GOT16 relocations */
5548 BFD_ASSERT (sec != NULL);
5549 BFD_ASSERT (bfd_is_und_section (sec)
5550 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
5551 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
5553 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
5556 case R_PPC_PLTREL24:
5557 /* Relocation is to the entry for this symbol in the
5558 procedure linkage table. */
5559 BFD_ASSERT (h != NULL);
5561 if (h->plt.offset == (bfd_vma) -1
5562 || htab->plt == NULL)
5564 /* We didn't make a PLT entry for this symbol. This
5565 happens when statically linking PIC code, or when
5566 using -Bsymbolic. */
5570 unresolved_reloc = FALSE;
5571 relocation = (htab->plt->output_section->vma
5572 + htab->plt->output_offset
5576 /* Relocate against _SDA_BASE_. */
5577 case R_PPC_SDAREL16:
5581 BFD_ASSERT (sec != NULL);
5582 name = bfd_get_section_name (abfd, sec->output_section);
5583 if (! ((strncmp (name, ".sdata", 6) == 0
5584 && (name[6] == 0 || name[6] == '.'))
5585 || (strncmp (name, ".sbss", 5) == 0
5586 && (name[5] == 0 || name[5] == '.'))))
5588 (*_bfd_error_handler)
5589 (_("%B: the target (%s) of a %s relocation is "
5590 "in the wrong output section (%s)"),
5596 addend -= htab->sdata[0].sym_val;
5600 /* Relocate against _SDA2_BASE_. */
5601 case R_PPC_EMB_SDA2REL:
5605 BFD_ASSERT (sec != NULL);
5606 name = bfd_get_section_name (abfd, sec->output_section);
5607 if (! (strncmp (name, ".sdata2", 7) == 0
5608 || strncmp (name, ".sbss2", 6) == 0))
5610 (*_bfd_error_handler)
5611 (_("%B: the target (%s) of a %s relocation is "
5612 "in the wrong output section (%s)"),
5618 bfd_set_error (bfd_error_bad_value);
5622 addend -= htab->sdata[1].sym_val;
5626 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
5627 case R_PPC_EMB_SDA21:
5628 case R_PPC_EMB_RELSDA:
5633 BFD_ASSERT (sec != NULL);
5634 name = bfd_get_section_name (abfd, sec->output_section);
5635 if (((strncmp (name, ".sdata", 6) == 0
5636 && (name[6] == 0 || name[6] == '.'))
5637 || (strncmp (name, ".sbss", 5) == 0
5638 && (name[5] == 0 || name[5] == '.'))))
5641 addend -= htab->sdata[0].sym_val;
5644 else if (strncmp (name, ".sdata2", 7) == 0
5645 || strncmp (name, ".sbss2", 6) == 0)
5648 addend -= htab->sdata[1].sym_val;
5651 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
5652 || strcmp (name, ".PPC.EMB.sbss0") == 0)
5659 (*_bfd_error_handler)
5660 (_("%B: the target (%s) of a %s relocation is "
5661 "in the wrong output section (%s)"),
5667 bfd_set_error (bfd_error_bad_value);
5672 if (r_type == R_PPC_EMB_SDA21)
5673 { /* fill in register field */
5674 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5675 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
5676 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5681 /* Relocate against the beginning of the section. */
5683 case R_PPC_SECTOFF_LO:
5684 case R_PPC_SECTOFF_HI:
5685 case R_PPC_SECTOFF_HA:
5686 BFD_ASSERT (sec != NULL);
5687 addend -= sec->output_section->vma;
5690 /* Negative relocations. */
5691 case R_PPC_EMB_NADDR32:
5692 case R_PPC_EMB_NADDR16:
5693 case R_PPC_EMB_NADDR16_LO:
5694 case R_PPC_EMB_NADDR16_HI:
5695 case R_PPC_EMB_NADDR16_HA:
5696 addend -= 2 * relocation;
5700 case R_PPC_GLOB_DAT:
5701 case R_PPC_JMP_SLOT:
5702 case R_PPC_RELATIVE:
5704 case R_PPC_PLTREL32:
5705 case R_PPC_PLT16_LO:
5706 case R_PPC_PLT16_HI:
5707 case R_PPC_PLT16_HA:
5709 case R_PPC_EMB_RELSEC16:
5710 case R_PPC_EMB_RELST_LO:
5711 case R_PPC_EMB_RELST_HI:
5712 case R_PPC_EMB_RELST_HA:
5713 case R_PPC_EMB_BIT_FLD:
5714 (*_bfd_error_handler)
5715 (_("%B: relocation %s is not yet supported for symbol %s."),
5720 bfd_set_error (bfd_error_invalid_operation);
5725 /* Do any further special processing. */
5731 case R_PPC_ADDR16_HA:
5732 case R_PPC_GOT16_HA:
5733 case R_PPC_PLT16_HA:
5734 case R_PPC_SECTOFF_HA:
5735 case R_PPC_TPREL16_HA:
5736 case R_PPC_DTPREL16_HA:
5737 case R_PPC_GOT_TLSGD16_HA:
5738 case R_PPC_GOT_TLSLD16_HA:
5739 case R_PPC_GOT_TPREL16_HA:
5740 case R_PPC_GOT_DTPREL16_HA:
5741 case R_PPC_EMB_NADDR16_HA:
5742 case R_PPC_EMB_RELST_HA:
5743 /* It's just possible that this symbol is a weak symbol
5744 that's not actually defined anywhere. In that case,
5745 'sec' would be NULL, and we should leave the symbol
5746 alone (it will be set to zero elsewhere in the link). */
5748 /* Add 0x10000 if sign bit in 0:15 is set.
5749 Bits 0:15 are not used. */
5755 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
5756 "offset = %ld, addend = %ld\n",
5761 (long) rel->r_offset,
5765 if (unresolved_reloc
5766 && !((input_section->flags & SEC_DEBUGGING) != 0
5769 (*_bfd_error_handler)
5770 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5773 (long) rel->r_offset,
5779 r = _bfd_final_link_relocate (howto,
5787 if (r != bfd_reloc_ok)
5789 if (sym_name == NULL)
5790 sym_name = "(null)";
5791 if (r == bfd_reloc_overflow)
5796 && h->root.type == bfd_link_hash_undefweak
5797 && howto->pc_relative)
5799 /* Assume this is a call protected by other code that
5800 detect the symbol is undefined. If this is the case,
5801 we can safely ignore the overflow. If not, the
5802 program is hosed anyway, and a little warning isn't
5808 if (! (*info->callbacks->reloc_overflow) (info,
5809 (h ? &h->root : NULL),
5820 (*_bfd_error_handler)
5821 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
5822 input_bfd, input_section,
5823 (long) rel->r_offset, howto->name, sym_name, (int) r);
5830 fprintf (stderr, "\n");
5836 /* Finish up dynamic symbol handling. We set the contents of various
5837 dynamic sections here. */
5840 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
5841 struct bfd_link_info *info,
5842 struct elf_link_hash_entry *h,
5843 Elf_Internal_Sym *sym)
5845 struct ppc_elf_link_hash_table *htab;
5848 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
5849 h->root.root.string);
5852 htab = ppc_elf_hash_table (info);
5853 BFD_ASSERT (htab->elf.dynobj != NULL);
5855 if (h->plt.offset != (bfd_vma) -1)
5857 Elf_Internal_Rela rela;
5859 bfd_vma reloc_index;
5862 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
5865 /* This symbol has an entry in the procedure linkage table. Set
5868 BFD_ASSERT (h->dynindx != -1);
5869 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
5871 /* We don't need to fill in the .plt. The ppc dynamic linker
5874 /* Fill in the entry in the .rela.plt section. */
5875 rela.r_offset = (htab->plt->output_section->vma
5876 + htab->plt->output_offset
5878 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
5881 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
5882 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
5883 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
5884 loc = (htab->relplt->contents
5885 + reloc_index * sizeof (Elf32_External_Rela));
5886 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5888 if (!h->def_regular)
5890 /* Mark the symbol as undefined, rather than as defined in
5891 the .plt section. Leave the value alone. */
5892 sym->st_shndx = SHN_UNDEF;
5893 /* If the symbol is weak, we do need to clear the value.
5894 Otherwise, the PLT entry would provide a definition for
5895 the symbol even if the symbol wasn't defined anywhere,
5896 and so the symbol would never be NULL. */
5897 if (!h->ref_regular_nonweak)
5905 Elf_Internal_Rela rela;
5908 /* This symbols needs a copy reloc. Set it up. */
5911 fprintf (stderr, ", copy");
5914 BFD_ASSERT (h->dynindx != -1);
5916 if (h->size <= elf_gp_size (htab->elf.dynobj))
5920 BFD_ASSERT (s != NULL);
5922 rela.r_offset = (h->root.u.def.value
5923 + h->root.u.def.section->output_section->vma
5924 + h->root.u.def.section->output_offset);
5925 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
5927 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
5928 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5932 fprintf (stderr, "\n");
5935 /* Mark some specially defined symbols as absolute. */
5936 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5937 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
5938 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
5939 sym->st_shndx = SHN_ABS;
5944 static enum elf_reloc_type_class
5945 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
5947 switch (ELF32_R_TYPE (rela->r_info))
5949 case R_PPC_RELATIVE:
5950 return reloc_class_relative;
5953 case R_PPC_JMP_SLOT:
5954 return reloc_class_plt;
5956 return reloc_class_copy;
5958 return reloc_class_normal;
5962 /* Finish up the dynamic sections. */
5965 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
5966 struct bfd_link_info *info)
5969 struct ppc_elf_link_hash_table *htab;
5972 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
5975 htab = ppc_elf_hash_table (info);
5976 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
5978 if (htab->elf.dynamic_sections_created)
5980 Elf32_External_Dyn *dyncon, *dynconend;
5982 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
5984 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5985 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5986 for (; dyncon < dynconend; dyncon++)
5988 Elf_Internal_Dyn dyn;
5991 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
5997 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6001 dyn.d_un.d_val = htab->relplt->size;
6006 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6013 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6017 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
6018 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
6021 unsigned char *contents = htab->got->contents;
6022 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
6025 bfd_put_32 (output_bfd, 0, contents + 4);
6027 bfd_put_32 (output_bfd,
6028 sdyn->output_section->vma + sdyn->output_offset,
6031 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
6037 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
6038 #define TARGET_LITTLE_NAME "elf32-powerpcle"
6039 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
6040 #define TARGET_BIG_NAME "elf32-powerpc"
6041 #define ELF_ARCH bfd_arch_powerpc
6042 #define ELF_MACHINE_CODE EM_PPC
6043 #ifdef __QNXTARGET__
6044 #define ELF_MAXPAGESIZE 0x1000
6046 #define ELF_MAXPAGESIZE 0x10000
6048 #define ELF_MINPAGESIZE 0x1000
6049 #define elf_info_to_howto ppc_elf_info_to_howto
6051 #ifdef EM_CYGNUS_POWERPC
6052 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6056 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6059 #define elf_backend_plt_not_loaded 1
6060 #define elf_backend_got_symbol_offset 4
6061 #define elf_backend_can_gc_sections 1
6062 #define elf_backend_can_refcount 1
6063 #define elf_backend_got_header_size 12
6064 #define elf_backend_rela_normal 1
6066 #define bfd_elf32_mkobject ppc_elf_mkobject
6067 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
6068 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
6069 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
6070 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
6071 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
6073 #define elf_backend_object_p ppc_elf_object_p
6074 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
6075 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
6076 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
6077 #define elf_backend_relocate_section ppc_elf_relocate_section
6078 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
6079 #define elf_backend_check_relocs ppc_elf_check_relocs
6080 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
6081 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
6082 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
6083 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
6084 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
6085 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
6086 #define elf_backend_fake_sections ppc_elf_fake_sections
6087 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
6088 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
6089 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
6090 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
6091 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
6092 #define elf_backend_final_write_processing ppc_elf_final_write_processing
6093 #define elf_backend_write_section ppc_elf_write_section
6094 #define elf_backend_special_sections ppc_elf_special_sections
6095 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
6097 #include "elf32-target.h"
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