1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 /* This file is based on the 64-bit PowerPC ELF ABI. It is also based
23 on the file elf32-ppc.c. */
31 #include "elf64-ppc.h"
33 #define USE_RELA /* we want RELA relocations, not REL. */
36 static void ppc_howto_init
38 static reloc_howto_type
*ppc64_elf_reloc_type_lookup
39 PARAMS ((bfd
*abfd
, bfd_reloc_code_real_type code
));
40 static void ppc64_elf_info_to_howto
41 PARAMS ((bfd
*abfd
, arelent
*cache_ptr
, Elf64_Internal_Rela
*dst
));
42 static bfd_reloc_status_type ppc64_elf_addr16_ha_reloc
43 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
44 static boolean ppc64_elf_set_private_flags
45 PARAMS ((bfd
*, flagword
));
46 static boolean ppc64_elf_merge_private_bfd_data
47 PARAMS ((bfd
*, bfd
*));
48 static boolean ppc64_elf_section_from_shdr
49 PARAMS ((bfd
*, Elf64_Internal_Shdr
*, char *));
50 static struct bfd_hash_entry
*link_hash_newfunc
51 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
52 static struct bfd_link_hash_table
*ppc64_elf_link_hash_table_create
54 static boolean create_linkage_sections
55 PARAMS ((bfd
*, struct bfd_link_info
*));
56 static boolean create_got_section
57 PARAMS ((bfd
*, struct bfd_link_info
*));
58 static boolean ppc64_elf_create_dynamic_sections
59 PARAMS ((bfd
*, struct bfd_link_info
*));
60 static void ppc64_elf_copy_indirect_symbol
61 PARAMS ((struct elf_link_hash_entry
*, struct elf_link_hash_entry
*));
62 static boolean ppc64_elf_check_relocs
63 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
64 const Elf_Internal_Rela
*));
65 static asection
* ppc64_elf_gc_mark_hook
66 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Rela
*rel
,
67 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
));
68 static boolean ppc64_elf_gc_sweep_hook
69 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
, asection
*sec
,
70 const Elf_Internal_Rela
*relocs
));
71 static boolean func_desc_adjust
72 PARAMS ((struct elf_link_hash_entry
*, PTR
));
73 static boolean ppc64_elf_func_desc_adjust
74 PARAMS ((bfd
*, struct bfd_link_info
*));
75 static boolean ppc64_elf_adjust_dynamic_symbol
76 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*));
77 static void ppc64_elf_hide_symbol
78 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*, boolean
));
79 static boolean allocate_dynrelocs
80 PARAMS ((struct elf_link_hash_entry
*, PTR
));
81 static boolean readonly_dynrelocs
82 PARAMS ((struct elf_link_hash_entry
*, PTR
));
83 static enum elf_reloc_type_class ppc64_elf_reloc_type_class
84 PARAMS ((const Elf_Internal_Rela
*));
85 static boolean ppc64_elf_size_dynamic_sections
86 PARAMS ((bfd
*, struct bfd_link_info
*));
87 static bfd_byte
*build_plt_stub
88 PARAMS ((bfd
*, bfd_byte
*, int, int));
89 static boolean build_one_stub
90 PARAMS ((struct elf_link_hash_entry
*, PTR
));
91 static boolean ppc64_elf_fake_sections
92 PARAMS ((bfd
*, Elf64_Internal_Shdr
*, asection
*));
93 static boolean ppc64_elf_relocate_section
94 PARAMS ((bfd
*, struct bfd_link_info
*info
, bfd
*, asection
*, bfd_byte
*,
95 Elf_Internal_Rela
*relocs
, Elf_Internal_Sym
*local_syms
,
97 static boolean ppc64_elf_finish_dynamic_symbol
98 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*,
100 static boolean ppc64_elf_finish_dynamic_sections
101 PARAMS ((bfd
*, struct bfd_link_info
*));
104 /* Mask to set RA in memory instructions. */
105 #define RA_REGISTER_MASK 0x001f0000
107 /* Value to shift register by to insert RA. */
108 #define RA_REGISTER_SHIFT 16
110 /* The name of the dynamic interpreter. This is put in the .interp
112 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
114 /* The size in bytes of an entry in the procedure linkage table. */
115 #define PLT_ENTRY_SIZE 24
117 /* The initial size of the plt reserved for the dynamic linker. */
118 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
120 /* TOC base pointers offset from start of TOC. */
121 #define TOC_BASE_OFF (0x8000)
123 /* .plt call stub instructions. */
124 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
125 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
126 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
127 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
128 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
129 /* ld %r11,xxx+16@l(%r12) */
130 #define BCTR 0x4e800420 /* bctr */
132 /* The normal stub is this size. */
133 #define PLT_CALL_STUB_SIZE (7*4)
135 /* But sometimes the .plt entry crosses a 64k boundary, and we need
136 to adjust the high word with this insn. */
137 #define ADDIS_R12_R12_1 0x3d8c0001 /* addis %r12,%r12,1 */
139 /* The .glink fixup call stub is the same as the .plt call stub, but
140 the first instruction restores r2, and the std is omitted. */
141 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
143 /* Always allow this much space. */
144 #define GLINK_CALL_STUB_SIZE (8*4)
147 #define NOP 0x60000000
149 /* .glink entries for the first 32k functions are two instructions. */
150 #define LI_R0_0 0x38000000 /* li %r0,0 */
151 #define B_DOT 0x48000000 /* b . */
153 /* After that, we need two instructions to load the index, followed by
155 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
156 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
158 /* Instructions to save and restore floating point regs. */
159 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
160 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
161 #define BLR 0x4e800020 /* blr */
163 /* Since .opd is an array of descriptors and each entry will end up
164 with identical R_PPC64_RELATIVE relocs, there is really no need to
165 propagate .opd relocs; The dynamic linker should be taught to
166 relocate .opd without reloc entries. FIXME: .opd should be trimmed
168 #ifndef NO_OPD_RELOCS
169 #define NO_OPD_RELOCS 0
172 /* Relocation HOWTO's. */
173 static reloc_howto_type
*ppc64_elf_howto_table
[(int) R_PPC_max
];
175 static reloc_howto_type ppc64_elf_howto_raw
[] = {
176 /* This reloc does nothing. */
177 HOWTO (R_PPC64_NONE
, /* type */
179 2, /* size (0 = byte, 1 = short, 2 = long) */
181 false, /* pc_relative */
183 complain_overflow_bitfield
, /* complain_on_overflow */
184 bfd_elf_generic_reloc
, /* special_function */
185 "R_PPC64_NONE", /* name */
186 false, /* partial_inplace */
189 false), /* pcrel_offset */
191 /* A standard 32 bit relocation. */
192 HOWTO (R_PPC64_ADDR32
, /* type */
194 2, /* size (0 = byte, 1 = short, 2 = long) */
196 false, /* pc_relative */
198 complain_overflow_bitfield
, /* complain_on_overflow */
199 bfd_elf_generic_reloc
, /* special_function */
200 "R_PPC64_ADDR32", /* name */
201 false, /* partial_inplace */
203 0xffffffff, /* dst_mask */
204 false), /* pcrel_offset */
206 /* An absolute 26 bit branch; the lower two bits must be zero.
207 FIXME: we don't check that, we just clear them. */
208 HOWTO (R_PPC64_ADDR24
, /* type */
210 2, /* size (0 = byte, 1 = short, 2 = long) */
212 false, /* pc_relative */
214 complain_overflow_bitfield
, /* complain_on_overflow */
215 bfd_elf_generic_reloc
, /* special_function */
216 "R_PPC64_ADDR24", /* name */
217 false, /* partial_inplace */
219 0x3fffffc, /* dst_mask */
220 false), /* pcrel_offset */
222 /* A standard 16 bit relocation. */
223 HOWTO (R_PPC64_ADDR16
, /* type */
225 1, /* size (0 = byte, 1 = short, 2 = long) */
227 false, /* pc_relative */
229 complain_overflow_bitfield
, /* complain_on_overflow */
230 bfd_elf_generic_reloc
, /* special_function */
231 "R_PPC64_ADDR16", /* name */
232 false, /* partial_inplace */
234 0xffff, /* dst_mask */
235 false), /* pcrel_offset */
237 /* A 16 bit relocation without overflow. */
238 HOWTO (R_PPC64_ADDR16_LO
, /* type */
240 1, /* size (0 = byte, 1 = short, 2 = long) */
242 false, /* pc_relative */
244 complain_overflow_dont
,/* complain_on_overflow */
245 bfd_elf_generic_reloc
, /* special_function */
246 "R_PPC64_ADDR16_LO", /* name */
247 false, /* partial_inplace */
249 0xffff, /* dst_mask */
250 false), /* pcrel_offset */
252 /* Bits 16-31 of an address. */
253 HOWTO (R_PPC64_ADDR16_HI
, /* type */
255 1, /* size (0 = byte, 1 = short, 2 = long) */
257 false, /* pc_relative */
259 complain_overflow_dont
, /* complain_on_overflow */
260 bfd_elf_generic_reloc
, /* special_function */
261 "R_PPC64_ADDR16_HI", /* name */
262 false, /* partial_inplace */
264 0xffff, /* dst_mask */
265 false), /* pcrel_offset */
267 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
268 bits, treated as a signed number, is negative. */
269 HOWTO (R_PPC64_ADDR16_HA
, /* type */
271 1, /* size (0 = byte, 1 = short, 2 = long) */
273 false, /* pc_relative */
275 complain_overflow_dont
, /* complain_on_overflow */
276 ppc64_elf_addr16_ha_reloc
, /* special_function */
277 "R_PPC64_ADDR16_HA", /* name */
278 false, /* partial_inplace */
280 0xffff, /* dst_mask */
281 false), /* pcrel_offset */
283 /* An absolute 16 bit branch; the lower two bits must be zero.
284 FIXME: we don't check that, we just clear them. */
285 HOWTO (R_PPC64_ADDR14
, /* type */
287 2, /* size (0 = byte, 1 = short, 2 = long) */
289 false, /* pc_relative */
291 complain_overflow_bitfield
, /* complain_on_overflow */
292 bfd_elf_generic_reloc
, /* special_function */
293 "R_PPC64_ADDR14", /* name */
294 false, /* partial_inplace */
296 0xfffc, /* dst_mask */
297 false), /* pcrel_offset */
299 /* An absolute 16 bit branch, for which bit 10 should be set to
300 indicate that the branch is expected to be taken. The lower two
301 bits must be zero. */
302 HOWTO (R_PPC64_ADDR14_BRTAKEN
, /* type */
304 2, /* size (0 = byte, 1 = short, 2 = long) */
306 false, /* pc_relative */
308 complain_overflow_bitfield
, /* complain_on_overflow */
309 bfd_elf_generic_reloc
, /* special_function */
310 "R_PPC64_ADDR14_BRTAKEN",/* name */
311 false, /* partial_inplace */
313 0xfffc, /* dst_mask */
314 false), /* pcrel_offset */
316 /* An absolute 16 bit branch, for which bit 10 should be set to
317 indicate that the branch is not expected to be taken. The lower
318 two bits must be zero. */
319 HOWTO (R_PPC64_ADDR14_BRNTAKEN
, /* type */
321 2, /* size (0 = byte, 1 = short, 2 = long) */
323 false, /* pc_relative */
325 complain_overflow_bitfield
, /* complain_on_overflow */
326 bfd_elf_generic_reloc
, /* special_function */
327 "R_PPC64_ADDR14_BRNTAKEN",/* name */
328 false, /* partial_inplace */
330 0xfffc, /* dst_mask */
331 false), /* pcrel_offset */
333 /* A relative 26 bit branch; the lower two bits must be zero. */
334 HOWTO (R_PPC64_REL24
, /* type */
336 2, /* size (0 = byte, 1 = short, 2 = long) */
338 true, /* pc_relative */
340 complain_overflow_signed
, /* complain_on_overflow */
341 bfd_elf_generic_reloc
, /* special_function */
342 "R_PPC64_REL24", /* name */
343 false, /* partial_inplace */
345 0x3fffffc, /* dst_mask */
346 true), /* pcrel_offset */
348 /* A relative 16 bit branch; the lower two bits must be zero. */
349 HOWTO (R_PPC64_REL14
, /* type */
351 2, /* size (0 = byte, 1 = short, 2 = long) */
353 true, /* pc_relative */
355 complain_overflow_signed
, /* complain_on_overflow */
356 bfd_elf_generic_reloc
, /* special_function */
357 "R_PPC64_REL14", /* name */
358 false, /* partial_inplace */
360 0xfffc, /* dst_mask */
361 true), /* pcrel_offset */
363 /* A relative 16 bit branch. Bit 10 should be set to indicate that
364 the branch is expected to be taken. The lower two bits must be
366 HOWTO (R_PPC64_REL14_BRTAKEN
, /* type */
368 2, /* size (0 = byte, 1 = short, 2 = long) */
370 true, /* pc_relative */
372 complain_overflow_signed
, /* complain_on_overflow */
373 bfd_elf_generic_reloc
, /* special_function */
374 "R_PPC64_REL14_BRTAKEN", /* name */
375 false, /* partial_inplace */
377 0xfffc, /* dst_mask */
378 true), /* pcrel_offset */
380 /* A relative 16 bit branch. Bit 10 should be set to indicate that
381 the branch is not expected to be taken. The lower two bits must
383 HOWTO (R_PPC64_REL14_BRNTAKEN
, /* type */
385 2, /* size (0 = byte, 1 = short, 2 = long) */
387 true, /* pc_relative */
389 complain_overflow_signed
, /* complain_on_overflow */
390 bfd_elf_generic_reloc
, /* special_function */
391 "R_PPC64_REL14_BRNTAKEN",/* name */
392 false, /* partial_inplace */
394 0xfffc, /* dst_mask */
395 true), /* pcrel_offset */
397 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
399 HOWTO (R_PPC64_GOT16
, /* type */
401 1, /* size (0 = byte, 1 = short, 2 = long) */
403 false, /* pc_relative */
405 complain_overflow_signed
, /* complain_on_overflow */
406 bfd_elf_generic_reloc
, /* special_function */
407 "R_PPC64_GOT16", /* name */
408 false, /* partial_inplace */
410 0xffff, /* dst_mask */
411 false), /* pcrel_offset */
413 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
415 HOWTO (R_PPC64_GOT16_LO
, /* type */
417 1, /* size (0 = byte, 1 = short, 2 = long) */
419 false, /* pc_relative */
421 complain_overflow_dont
, /* complain_on_overflow */
422 bfd_elf_generic_reloc
, /* special_function */
423 "R_PPC64_GOT16_LO", /* name */
424 false, /* partial_inplace */
426 0xffff, /* dst_mask */
427 false), /* pcrel_offset */
429 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
431 HOWTO (R_PPC64_GOT16_HI
, /* type */
433 1, /* size (0 = byte, 1 = short, 2 = long) */
435 false, /* pc_relative */
437 complain_overflow_dont
,/* complain_on_overflow */
438 bfd_elf_generic_reloc
, /* special_function */
439 "R_PPC64_GOT16_HI", /* name */
440 false, /* partial_inplace */
442 0xffff, /* dst_mask */
443 false), /* pcrel_offset */
445 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
447 HOWTO (R_PPC64_GOT16_HA
, /* type */
449 1, /* size (0 = byte, 1 = short, 2 = long) */
451 false, /* pc_relative */
453 complain_overflow_dont
,/* complain_on_overflow */
454 ppc64_elf_addr16_ha_reloc
, /* special_function */
455 "R_PPC64_GOT16_HA", /* name */
456 false, /* partial_inplace */
458 0xffff, /* dst_mask */
459 false), /* pcrel_offset */
461 /* This is used only by the dynamic linker. The symbol should exist
462 both in the object being run and in some shared library. The
463 dynamic linker copies the data addressed by the symbol from the
464 shared library into the object, because the object being
465 run has to have the data at some particular address. */
466 HOWTO (R_PPC64_COPY
, /* type */
468 2, /* size (0 = byte, 1 = short, 2 = long) */
470 false, /* pc_relative */
472 complain_overflow_bitfield
, /* complain_on_overflow */
473 bfd_elf_generic_reloc
, /* special_function */
474 "R_PPC64_COPY", /* name */
475 false, /* partial_inplace */
478 false), /* pcrel_offset */
480 /* Like R_PPC64_ADDR64, but used when setting global offset table
482 HOWTO (R_PPC64_GLOB_DAT
, /* type */
484 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
486 false, /* pc_relative */
488 complain_overflow_dont
, /* complain_on_overflow */
489 bfd_elf_generic_reloc
, /* special_function */
490 "R_PPC64_GLOB_DAT", /* name */
491 false, /* partial_inplace */
493 0xffffffffffffffff, /* dst_mask */
494 false), /* pcrel_offset */
496 /* Created by the link editor. Marks a procedure linkage table
497 entry for a symbol. */
498 HOWTO (R_PPC64_JMP_SLOT
, /* type */
500 0, /* size (0 = byte, 1 = short, 2 = long) */
502 false, /* pc_relative */
504 complain_overflow_dont
, /* complain_on_overflow */
505 bfd_elf_generic_reloc
, /* special_function */
506 "R_PPC64_JMP_SLOT", /* name */
507 false, /* partial_inplace */
510 false), /* pcrel_offset */
512 /* Used only by the dynamic linker. When the object is run, this
513 doubleword64 is set to the load address of the object, plus the
515 HOWTO (R_PPC64_RELATIVE
, /* type */
517 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
519 false, /* pc_relative */
521 complain_overflow_dont
, /* complain_on_overflow */
522 bfd_elf_generic_reloc
, /* special_function */
523 "R_PPC64_RELATIVE", /* name */
524 false, /* partial_inplace */
526 0xffffffffffffffff, /* dst_mask */
527 false), /* pcrel_offset */
529 /* Like R_PPC64_ADDR32, but may be unaligned. */
530 HOWTO (R_PPC64_UADDR32
, /* type */
532 2, /* size (0 = byte, 1 = short, 2 = long) */
534 false, /* pc_relative */
536 complain_overflow_bitfield
, /* complain_on_overflow */
537 bfd_elf_generic_reloc
, /* special_function */
538 "R_PPC64_UADDR32", /* name */
539 false, /* partial_inplace */
541 0xffffffff, /* dst_mask */
542 false), /* pcrel_offset */
544 /* Like R_PPC64_ADDR16, but may be unaligned. */
545 HOWTO (R_PPC64_UADDR16
, /* type */
547 1, /* size (0 = byte, 1 = short, 2 = long) */
549 false, /* pc_relative */
551 complain_overflow_bitfield
, /* complain_on_overflow */
552 bfd_elf_generic_reloc
, /* special_function */
553 "R_PPC64_UADDR16", /* name */
554 false, /* partial_inplace */
556 0xffff, /* dst_mask */
557 false), /* pcrel_offset */
559 /* 32-bit PC relative. */
560 HOWTO (R_PPC64_REL32
, /* type */
562 2, /* size (0 = byte, 1 = short, 2 = long) */
564 true, /* pc_relative */
566 /* FIXME: Verify. Was complain_overflow_bitfield. */
567 complain_overflow_signed
, /* complain_on_overflow */
568 bfd_elf_generic_reloc
, /* special_function */
569 "R_PPC64_REL32", /* name */
570 false, /* partial_inplace */
572 0xffffffff, /* dst_mask */
573 true), /* pcrel_offset */
575 /* 32-bit relocation to the symbol's procedure linkage table. */
576 HOWTO (R_PPC64_PLT32
, /* type */
578 2, /* size (0 = byte, 1 = short, 2 = long) */
580 false, /* pc_relative */
582 complain_overflow_bitfield
, /* complain_on_overflow */
583 bfd_elf_generic_reloc
, /* special_function */
584 "R_PPC64_PLT32", /* name */
585 false, /* partial_inplace */
588 false), /* pcrel_offset */
590 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
591 FIXME: R_PPC64_PLTREL32 not supported. */
592 HOWTO (R_PPC64_PLTREL32
, /* type */
594 2, /* size (0 = byte, 1 = short, 2 = long) */
596 true, /* pc_relative */
598 complain_overflow_signed
, /* complain_on_overflow */
599 bfd_elf_generic_reloc
, /* special_function */
600 "R_PPC64_PLTREL32", /* name */
601 false, /* partial_inplace */
604 true), /* pcrel_offset */
606 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
608 HOWTO (R_PPC64_PLT16_LO
, /* type */
610 1, /* size (0 = byte, 1 = short, 2 = long) */
612 false, /* pc_relative */
614 complain_overflow_dont
, /* complain_on_overflow */
615 bfd_elf_generic_reloc
, /* special_function */
616 "R_PPC64_PLT16_LO", /* name */
617 false, /* partial_inplace */
619 0xffff, /* dst_mask */
620 false), /* pcrel_offset */
622 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
624 HOWTO (R_PPC64_PLT16_HI
, /* type */
626 1, /* size (0 = byte, 1 = short, 2 = long) */
628 false, /* pc_relative */
630 complain_overflow_dont
, /* complain_on_overflow */
631 bfd_elf_generic_reloc
, /* special_function */
632 "R_PPC64_PLT16_HI", /* name */
633 false, /* partial_inplace */
635 0xffff, /* dst_mask */
636 false), /* pcrel_offset */
638 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
640 HOWTO (R_PPC64_PLT16_HA
, /* type */
642 1, /* size (0 = byte, 1 = short, 2 = long) */
644 false, /* pc_relative */
646 complain_overflow_dont
, /* complain_on_overflow */
647 ppc64_elf_addr16_ha_reloc
, /* special_function */
648 "R_PPC64_PLT16_HA", /* name */
649 false, /* partial_inplace */
651 0xffff, /* dst_mask */
652 false), /* pcrel_offset */
654 /* 32-bit section relative relocation. */
655 /* FIXME: Verify R_PPC64_SECTOFF. Seems strange with size=2 and
657 HOWTO (R_PPC64_SECTOFF
, /* type */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
661 true, /* pc_relative */
663 complain_overflow_bitfield
, /* complain_on_overflow */
664 bfd_elf_generic_reloc
, /* special_function */
665 "R_PPC64_SECTOFF", /* name */
666 false, /* partial_inplace */
669 true), /* pcrel_offset */
671 /* 16-bit lower half section relative relocation. */
672 HOWTO (R_PPC64_SECTOFF_LO
, /* type */
674 1, /* size (0 = byte, 1 = short, 2 = long) */
676 false, /* pc_relative */
678 complain_overflow_dont
, /* complain_on_overflow */
679 bfd_elf_generic_reloc
, /* special_function */
680 "R_PPC64_SECTOFF_LO", /* name */
681 false, /* partial_inplace */
683 0xffff, /* dst_mask */
684 false), /* pcrel_offset */
686 /* 16-bit upper half section relative relocation. */
687 HOWTO (R_PPC64_SECTOFF_HI
, /* type */
689 1, /* size (0 = byte, 1 = short, 2 = long) */
691 false, /* pc_relative */
693 complain_overflow_dont
, /* complain_on_overflow */
694 bfd_elf_generic_reloc
, /* special_function */
695 "R_PPC64_SECTOFF_HI", /* name */
696 false, /* partial_inplace */
698 0xffff, /* dst_mask */
699 false), /* pcrel_offset */
701 /* 16-bit upper half adjusted section relative relocation. */
702 HOWTO (R_PPC64_SECTOFF_HA
, /* type */
704 1, /* size (0 = byte, 1 = short, 2 = long) */
706 false, /* pc_relative */
708 complain_overflow_dont
, /* complain_on_overflow */
709 ppc64_elf_addr16_ha_reloc
, /* special_function */
710 "R_PPC64_SECTOFF_HA", /* name */
711 false, /* partial_inplace */
713 0xffff, /* dst_mask */
714 false), /* pcrel_offset */
716 /* Like R_PPC64_REL24 without touching the two least significant
718 /* FIXME: Verify R_PPC64_ADDR30. */
719 HOWTO (R_PPC64_ADDR30
, /* type */
721 2, /* size (0 = byte, 1 = short, 2 = long) */
723 true, /* pc_relative */
725 complain_overflow_dont
, /* complain_on_overflow */
726 bfd_elf_generic_reloc
, /* special_function */
727 "R_PPC64_ADDR30", /* name */
728 false, /* partial_inplace */
730 0xfffffffc, /* dst_mask */
731 true), /* pcrel_offset */
733 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
735 /* A standard 64-bit relocation. */
736 HOWTO (R_PPC64_ADDR64
, /* type */
738 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
740 false, /* pc_relative */
742 complain_overflow_dont
, /* complain_on_overflow */
743 bfd_elf_generic_reloc
, /* special_function */
744 "R_PPC64_ADDR64", /* name */
745 false, /* partial_inplace */
747 0xffffffffffffffff, /* dst_mask */
748 false), /* pcrel_offset */
750 /* The bits 32-47 of an address. */
751 HOWTO (R_PPC64_ADDR16_HIGHER
, /* type */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
755 false, /* pc_relative */
757 complain_overflow_dont
, /* complain_on_overflow */
758 bfd_elf_generic_reloc
, /* special_function */
759 "R_PPC64_ADDR16_HIGHER", /* name */
760 false, /* partial_inplace */
762 0xffff, /* dst_mask */
763 false), /* pcrel_offset */
765 /* The bits 32-47 of an address, plus 1 if the contents of the low
766 16 bits, treated as a signed number, is negative. */
767 HOWTO (R_PPC64_ADDR16_HIGHERA
, /* type */
769 1, /* size (0 = byte, 1 = short, 2 = long) */
771 false, /* pc_relative */
773 complain_overflow_dont
, /* complain_on_overflow */
774 ppc64_elf_addr16_ha_reloc
, /* special_function */
775 "R_PPC64_ADDR16_HIGHERA", /* name */
776 false, /* partial_inplace */
778 0xffff, /* dst_mask */
779 false), /* pcrel_offset */
781 /* The bits 48-63 of an address. */
782 HOWTO (R_PPC64_ADDR16_HIGHEST
,/* type */
784 1, /* size (0 = byte, 1 = short, 2 = long) */
786 false, /* pc_relative */
788 complain_overflow_dont
, /* complain_on_overflow */
789 bfd_elf_generic_reloc
, /* special_function */
790 "R_PPC64_ADDR16_HIGHEST", /* name */
791 false, /* partial_inplace */
793 0xffff, /* dst_mask */
794 false), /* pcrel_offset */
796 /* The bits 48-63 of an address, plus 1 if the contents of the low
797 16 bits, treated as a signed number, is negative. */
798 HOWTO (R_PPC64_ADDR16_HIGHESTA
,/* type */
800 1, /* size (0 = byte, 1 = short, 2 = long) */
802 false, /* pc_relative */
804 complain_overflow_dont
, /* complain_on_overflow */
805 ppc64_elf_addr16_ha_reloc
, /* special_function */
806 "R_PPC64_ADDR16_HIGHESTA", /* name */
807 false, /* partial_inplace */
809 0xffff, /* dst_mask */
810 false), /* pcrel_offset */
812 /* Like ADDR64, but may be unaligned. */
813 HOWTO (R_PPC64_UADDR64
, /* type */
815 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
817 false, /* pc_relative */
819 complain_overflow_dont
, /* complain_on_overflow */
820 bfd_elf_generic_reloc
, /* special_function */
821 "R_PPC64_UADDR64", /* name */
822 false, /* partial_inplace */
824 0xffffffffffffffff, /* dst_mask */
825 false), /* pcrel_offset */
827 /* 64-bit relative relocation. */
828 HOWTO (R_PPC64_REL64
, /* type */
830 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
832 true, /* pc_relative */
834 complain_overflow_dont
, /* complain_on_overflow */
835 bfd_elf_generic_reloc
, /* special_function */
836 "R_PPC64_REL64", /* name */
837 false, /* partial_inplace */
839 0xffffffffffffffff, /* dst_mask */
840 true), /* pcrel_offset */
842 /* 64-bit relocation to the symbol's procedure linkage table. */
843 HOWTO (R_PPC64_PLT64
, /* type */
845 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
847 false, /* pc_relative */
849 complain_overflow_dont
, /* complain_on_overflow */
850 bfd_elf_generic_reloc
, /* special_function */
851 "R_PPC64_PLT64", /* name */
852 false, /* partial_inplace */
855 false), /* pcrel_offset */
857 /* 64-bit PC relative relocation to the symbol's procedure linkage
859 /* FIXME: R_PPC64_PLTREL64 not supported. */
860 HOWTO (R_PPC64_PLTREL64
, /* type */
862 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
864 true, /* pc_relative */
866 complain_overflow_dont
, /* complain_on_overflow */
867 bfd_elf_generic_reloc
, /* special_function */
868 "R_PPC64_PLTREL64", /* name */
869 false, /* partial_inplace */
872 true), /* pcrel_offset */
874 /* 16 bit TOC-relative relocation. */
876 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
877 HOWTO (R_PPC64_TOC16
, /* type */
879 1, /* size (0 = byte, 1 = short, 2 = long) */
881 false, /* pc_relative */
883 complain_overflow_signed
, /* complain_on_overflow */
884 bfd_elf_generic_reloc
, /* special_function */
885 "R_PPC64_TOC16", /* name */
886 false, /* partial_inplace */
888 0xffff, /* dst_mask */
889 false), /* pcrel_offset */
891 /* 16 bit TOC-relative relocation without overflow. */
893 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
894 HOWTO (R_PPC64_TOC16_LO
, /* type */
896 1, /* size (0 = byte, 1 = short, 2 = long) */
898 false, /* pc_relative */
900 complain_overflow_dont
, /* complain_on_overflow */
901 bfd_elf_generic_reloc
, /* special_function */
902 "R_PPC64_TOC16_LO", /* name */
903 false, /* partial_inplace */
905 0xffff, /* dst_mask */
906 false), /* pcrel_offset */
908 /* 16 bit TOC-relative relocation, high 16 bits. */
910 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
911 HOWTO (R_PPC64_TOC16_HI
, /* type */
913 1, /* size (0 = byte, 1 = short, 2 = long) */
915 false, /* pc_relative */
917 complain_overflow_dont
, /* complain_on_overflow */
918 bfd_elf_generic_reloc
, /* special_function */
919 "R_PPC64_TOC16_HI", /* name */
920 false, /* partial_inplace */
922 0xffff, /* dst_mask */
923 false), /* pcrel_offset */
925 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
926 contents of the low 16 bits, treated as a signed number, is
929 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
930 HOWTO (R_PPC64_TOC16_HA
, /* type */
932 1, /* size (0 = byte, 1 = short, 2 = long) */
934 false, /* pc_relative */
936 complain_overflow_dont
, /* complain_on_overflow */
937 ppc64_elf_addr16_ha_reloc
, /* special_function */
938 "R_PPC64_TOC16_HA", /* name */
939 false, /* partial_inplace */
941 0xffff, /* dst_mask */
942 false), /* pcrel_offset */
944 /* 64-bit relocation; insert value of TOC base (.TOC.). */
946 /* R_PPC64_TOC 51 doubleword64 .TOC. */
947 HOWTO (R_PPC64_TOC
, /* type */
949 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
951 false, /* pc_relative */
953 complain_overflow_bitfield
, /* complain_on_overflow */
954 bfd_elf_generic_reloc
, /* special_function */
955 "R_PPC64_TOC", /* name */
956 false, /* partial_inplace */
958 0xffffffffffffffff, /* dst_mask */
959 false), /* pcrel_offset */
961 /* Like R_PPC64_GOT16, but also informs the link editor that the
962 value to relocate may (!) refer to a PLT entry which the link
963 editor (a) may replace with the symbol value. If the link editor
964 is unable to fully resolve the symbol, it may (b) create a PLT
965 entry and store the address to the new PLT entry in the GOT.
966 This permits lazy resolution of function symbols at run time.
967 The link editor may also skip all of this and just (c) emit a
968 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
969 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
970 HOWTO (R_PPC64_PLTGOT16
, /* type */
972 1, /* size (0 = byte, 1 = short, 2 = long) */
974 false, /* pc_relative */
976 complain_overflow_signed
, /* complain_on_overflow */
977 bfd_elf_generic_reloc
, /* special_function */
978 "R_PPC64_PLTGOT16", /* name */
979 false, /* partial_inplace */
981 0xffff, /* dst_mask */
982 false), /* pcrel_offset */
984 /* Like R_PPC64_PLTGOT16, but without overflow. */
985 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
986 HOWTO (R_PPC64_PLTGOT16_LO
, /* type */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
990 false, /* pc_relative */
992 complain_overflow_dont
, /* complain_on_overflow */
993 bfd_elf_generic_reloc
, /* special_function */
994 "R_PPC64_PLTGOT16_LO", /* name */
995 false, /* partial_inplace */
997 0xffff, /* dst_mask */
998 false), /* pcrel_offset */
1000 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1001 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1002 HOWTO (R_PPC64_PLTGOT16_HI
, /* type */
1003 16, /* rightshift */
1004 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 false, /* pc_relative */
1008 complain_overflow_dont
, /* complain_on_overflow */
1009 bfd_elf_generic_reloc
, /* special_function */
1010 "R_PPC64_PLTGOT16_HI", /* name */
1011 false, /* partial_inplace */
1013 0xffff, /* dst_mask */
1014 false), /* pcrel_offset */
1016 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1017 1 if the contents of the low 16 bits, treated as a signed number,
1019 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1020 HOWTO (R_PPC64_PLTGOT16_HA
, /* type */
1021 16, /* rightshift */
1022 1, /* size (0 = byte, 1 = short, 2 = long) */
1024 false, /* pc_relative */
1026 complain_overflow_dont
,/* complain_on_overflow */
1027 ppc64_elf_addr16_ha_reloc
, /* special_function */
1028 "R_PPC64_PLTGOT16_HA", /* name */
1029 false, /* partial_inplace */
1031 0xffff, /* dst_mask */
1032 false), /* pcrel_offset */
1034 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1035 HOWTO (R_PPC64_ADDR16_DS
, /* type */
1037 1, /* size (0 = byte, 1 = short, 2 = long) */
1039 false, /* pc_relative */
1041 complain_overflow_bitfield
, /* complain_on_overflow */
1042 bfd_elf_generic_reloc
, /* special_function */
1043 "R_PPC64_ADDR16_DS", /* name */
1044 false, /* partial_inplace */
1046 0xfffc, /* dst_mask */
1047 false), /* pcrel_offset */
1049 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1050 HOWTO (R_PPC64_ADDR16_LO_DS
, /* type */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1054 false, /* pc_relative */
1056 complain_overflow_dont
,/* complain_on_overflow */
1057 bfd_elf_generic_reloc
, /* special_function */
1058 "R_PPC64_ADDR16_LO_DS",/* name */
1059 false, /* partial_inplace */
1061 0xfffc, /* dst_mask */
1062 false), /* pcrel_offset */
1064 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1065 HOWTO (R_PPC64_GOT16_DS
, /* type */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1069 false, /* pc_relative */
1071 complain_overflow_signed
, /* complain_on_overflow */
1072 bfd_elf_generic_reloc
, /* special_function */
1073 "R_PPC64_GOT16_DS", /* name */
1074 false, /* partial_inplace */
1076 0xfffc, /* dst_mask */
1077 false), /* pcrel_offset */
1079 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1080 HOWTO (R_PPC64_GOT16_LO_DS
, /* type */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1084 false, /* pc_relative */
1086 complain_overflow_dont
, /* complain_on_overflow */
1087 bfd_elf_generic_reloc
, /* special_function */
1088 "R_PPC64_GOT16_LO_DS", /* name */
1089 false, /* partial_inplace */
1091 0xfffc, /* dst_mask */
1092 false), /* pcrel_offset */
1094 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1095 HOWTO (R_PPC64_PLT16_LO_DS
, /* type */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1099 false, /* pc_relative */
1101 complain_overflow_dont
, /* complain_on_overflow */
1102 bfd_elf_generic_reloc
, /* special_function */
1103 "R_PPC64_PLT16_LO_DS", /* name */
1104 false, /* partial_inplace */
1106 0xfffc, /* dst_mask */
1107 false), /* pcrel_offset */
1109 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1110 /* FIXME: Verify R_PPC64_SECTOFF. Seems strange with size=2 and
1112 HOWTO (R_PPC64_SECTOFF_DS
, /* type */
1114 2, /* size (0 = byte, 1 = short, 2 = long) */
1116 true, /* pc_relative */
1118 complain_overflow_bitfield
, /* complain_on_overflow */
1119 bfd_elf_generic_reloc
, /* special_function */
1120 "R_PPC64_SECTOFF_DS", /* name */
1121 false, /* partial_inplace */
1124 true), /* pcrel_offset */
1126 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_SECTOFF_LO_DS
, /* type */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1131 false, /* pc_relative */
1133 complain_overflow_dont
, /* complain_on_overflow */
1134 bfd_elf_generic_reloc
, /* special_function */
1135 "R_PPC64_SECTOFF_LO_DS",/* name */
1136 false, /* partial_inplace */
1138 0xfffc, /* dst_mask */
1139 false), /* pcrel_offset */
1141 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_TOC16_DS
, /* type */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1146 false, /* pc_relative */
1148 complain_overflow_signed
, /* complain_on_overflow */
1149 bfd_elf_generic_reloc
, /* special_function */
1150 "R_PPC64_TOC16_DS", /* name */
1151 false, /* partial_inplace */
1153 0xfffc, /* dst_mask */
1154 false), /* pcrel_offset */
1156 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_TOC16_LO_DS
, /* type */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1161 false, /* pc_relative */
1163 complain_overflow_dont
, /* complain_on_overflow */
1164 bfd_elf_generic_reloc
, /* special_function */
1165 "R_PPC64_TOC16_LO_DS", /* name */
1166 false, /* partial_inplace */
1168 0xfffc, /* dst_mask */
1169 false), /* pcrel_offset */
1171 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1172 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1173 HOWTO (R_PPC64_PLTGOT16_DS
, /* type */
1175 1, /* size (0 = byte, 1 = short, 2 = long) */
1177 false, /* pc_relative */
1179 complain_overflow_signed
, /* complain_on_overflow */
1180 bfd_elf_generic_reloc
, /* special_function */
1181 "R_PPC64_PLTGOT16_DS", /* name */
1182 false, /* partial_inplace */
1184 0xfffc, /* dst_mask */
1185 false), /* pcrel_offset */
1187 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1188 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1189 HOWTO (R_PPC64_PLTGOT16_LO_DS
,/* type */
1191 1, /* size (0 = byte, 1 = short, 2 = long) */
1193 false, /* pc_relative */
1195 complain_overflow_dont
, /* complain_on_overflow */
1196 bfd_elf_generic_reloc
, /* special_function */
1197 "R_PPC64_PLTGOT16_LO_DS",/* name */
1198 false, /* partial_inplace */
1200 0xfffc, /* dst_mask */
1201 false), /* pcrel_offset */
1203 /* GNU extension to record C++ vtable hierarchy. */
1204 HOWTO (R_PPC64_GNU_VTINHERIT
, /* type */
1206 0, /* size (0 = byte, 1 = short, 2 = long) */
1208 false, /* pc_relative */
1210 complain_overflow_dont
, /* complain_on_overflow */
1211 NULL
, /* special_function */
1212 "R_PPC64_GNU_VTINHERIT", /* name */
1213 false, /* partial_inplace */
1216 false), /* pcrel_offset */
1218 /* GNU extension to record C++ vtable member usage. */
1219 HOWTO (R_PPC64_GNU_VTENTRY
, /* type */
1221 0, /* size (0 = byte, 1 = short, 2 = long) */
1223 false, /* pc_relative */
1225 complain_overflow_dont
, /* complain_on_overflow */
1226 NULL
, /* special_function */
1227 "R_PPC64_GNU_VTENTRY", /* name */
1228 false, /* partial_inplace */
1231 false), /* pcrel_offset */
1235 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1241 unsigned int i
, type
;
1244 i
< sizeof (ppc64_elf_howto_raw
) / sizeof (ppc64_elf_howto_raw
[0]);
1247 type
= ppc64_elf_howto_raw
[i
].type
;
1248 BFD_ASSERT (type
< (sizeof (ppc64_elf_howto_table
)
1249 / sizeof (ppc64_elf_howto_table
[0])));
1250 ppc64_elf_howto_table
[type
] = &ppc64_elf_howto_raw
[i
];
1254 static reloc_howto_type
*
1255 ppc64_elf_reloc_type_lookup (abfd
, code
)
1256 bfd
*abfd ATTRIBUTE_UNUSED
;
1257 bfd_reloc_code_real_type code
;
1259 enum elf_ppc_reloc_type ppc_reloc
= R_PPC_NONE
;
1261 if (!ppc64_elf_howto_table
[R_PPC64_ADDR32
])
1262 /* Initialize howto table if needed. */
1268 return (reloc_howto_type
*) NULL
;
1270 case BFD_RELOC_NONE
: ppc_reloc
= R_PPC64_NONE
;
1272 case BFD_RELOC_32
: ppc_reloc
= R_PPC64_ADDR32
;
1274 case BFD_RELOC_PPC_BA26
: ppc_reloc
= R_PPC64_ADDR24
;
1276 case BFD_RELOC_16
: ppc_reloc
= R_PPC64_ADDR16
;
1278 case BFD_RELOC_LO16
: ppc_reloc
= R_PPC64_ADDR16_LO
;
1280 case BFD_RELOC_HI16
: ppc_reloc
= R_PPC64_ADDR16_HI
;
1282 case BFD_RELOC_HI16_S
: ppc_reloc
= R_PPC64_ADDR16_HA
;
1284 case BFD_RELOC_PPC_BA16
: ppc_reloc
= R_PPC64_ADDR14
;
1286 case BFD_RELOC_PPC_BA16_BRTAKEN
: ppc_reloc
= R_PPC64_ADDR14_BRTAKEN
;
1288 case BFD_RELOC_PPC_BA16_BRNTAKEN
: ppc_reloc
= R_PPC64_ADDR14_BRNTAKEN
;
1290 case BFD_RELOC_PPC_B26
: ppc_reloc
= R_PPC64_REL24
;
1292 case BFD_RELOC_PPC_B16
: ppc_reloc
= R_PPC64_REL14
;
1294 case BFD_RELOC_PPC_B16_BRTAKEN
: ppc_reloc
= R_PPC64_REL14_BRTAKEN
;
1296 case BFD_RELOC_PPC_B16_BRNTAKEN
: ppc_reloc
= R_PPC64_REL14_BRNTAKEN
;
1298 case BFD_RELOC_16_GOTOFF
: ppc_reloc
= R_PPC64_GOT16
;
1300 case BFD_RELOC_LO16_GOTOFF
: ppc_reloc
= R_PPC64_GOT16_LO
;
1302 case BFD_RELOC_HI16_GOTOFF
: ppc_reloc
= R_PPC64_GOT16_HI
;
1304 case BFD_RELOC_HI16_S_GOTOFF
: ppc_reloc
= R_PPC64_GOT16_HA
;
1306 case BFD_RELOC_PPC_COPY
: ppc_reloc
= R_PPC64_COPY
;
1308 case BFD_RELOC_PPC_GLOB_DAT
: ppc_reloc
= R_PPC64_GLOB_DAT
;
1310 case BFD_RELOC_32_PCREL
: ppc_reloc
= R_PPC64_REL32
;
1312 case BFD_RELOC_32_PLTOFF
: ppc_reloc
= R_PPC64_PLT32
;
1314 case BFD_RELOC_32_PLT_PCREL
: ppc_reloc
= R_PPC64_PLTREL32
;
1316 case BFD_RELOC_LO16_PLTOFF
: ppc_reloc
= R_PPC64_PLT16_LO
;
1318 case BFD_RELOC_HI16_PLTOFF
: ppc_reloc
= R_PPC64_PLT16_HI
;
1320 case BFD_RELOC_HI16_S_PLTOFF
: ppc_reloc
= R_PPC64_PLT16_HA
;
1322 case BFD_RELOC_32_BASEREL
: ppc_reloc
= R_PPC64_SECTOFF
;
1324 case BFD_RELOC_LO16_BASEREL
: ppc_reloc
= R_PPC64_SECTOFF_LO
;
1326 case BFD_RELOC_HI16_BASEREL
: ppc_reloc
= R_PPC64_SECTOFF_HI
;
1328 case BFD_RELOC_HI16_S_BASEREL
: ppc_reloc
= R_PPC64_SECTOFF_HA
;
1330 case BFD_RELOC_CTOR
: ppc_reloc
= R_PPC64_ADDR64
;
1332 case BFD_RELOC_64
: ppc_reloc
= R_PPC64_ADDR64
;
1334 case BFD_RELOC_PPC64_HIGHER
: ppc_reloc
= R_PPC64_ADDR16_HIGHER
;
1336 case BFD_RELOC_PPC64_HIGHER_S
: ppc_reloc
= R_PPC64_ADDR16_HIGHERA
;
1338 case BFD_RELOC_PPC64_HIGHEST
: ppc_reloc
= R_PPC64_ADDR16_HIGHEST
;
1340 case BFD_RELOC_PPC64_HIGHEST_S
: ppc_reloc
= R_PPC64_ADDR16_HIGHESTA
;
1342 case BFD_RELOC_64_PCREL
: ppc_reloc
= R_PPC64_REL64
;
1344 case BFD_RELOC_64_PLTOFF
: ppc_reloc
= R_PPC64_PLT64
;
1346 case BFD_RELOC_64_PLT_PCREL
: ppc_reloc
= R_PPC64_PLTREL64
;
1348 case BFD_RELOC_PPC_TOC16
: ppc_reloc
= R_PPC64_TOC16
;
1350 case BFD_RELOC_PPC64_TOC16_LO
: ppc_reloc
= R_PPC64_TOC16_LO
;
1352 case BFD_RELOC_PPC64_TOC16_HI
: ppc_reloc
= R_PPC64_TOC16_HI
;
1354 case BFD_RELOC_PPC64_TOC16_HA
: ppc_reloc
= R_PPC64_TOC16_HA
;
1356 case BFD_RELOC_PPC64_TOC
: ppc_reloc
= R_PPC64_TOC
;
1358 case BFD_RELOC_PPC64_PLTGOT16
: ppc_reloc
= R_PPC64_PLTGOT16
;
1360 case BFD_RELOC_PPC64_PLTGOT16_LO
: ppc_reloc
= R_PPC64_PLTGOT16_LO
;
1362 case BFD_RELOC_PPC64_PLTGOT16_HI
: ppc_reloc
= R_PPC64_PLTGOT16_HI
;
1364 case BFD_RELOC_PPC64_PLTGOT16_HA
: ppc_reloc
= R_PPC64_PLTGOT16_HA
;
1366 case BFD_RELOC_PPC64_ADDR16_DS
: ppc_reloc
= R_PPC64_ADDR16_DS
;
1368 case BFD_RELOC_PPC64_ADDR16_LO_DS
: ppc_reloc
= R_PPC64_ADDR16_LO_DS
;
1370 case BFD_RELOC_PPC64_GOT16_DS
: ppc_reloc
= R_PPC64_GOT16_DS
;
1372 case BFD_RELOC_PPC64_GOT16_LO_DS
: ppc_reloc
= R_PPC64_GOT16_LO_DS
;
1374 case BFD_RELOC_PPC64_PLT16_LO_DS
: ppc_reloc
= R_PPC64_PLT16_LO_DS
;
1376 case BFD_RELOC_PPC64_SECTOFF_DS
: ppc_reloc
= R_PPC64_SECTOFF_DS
;
1378 case BFD_RELOC_PPC64_SECTOFF_LO_DS
: ppc_reloc
= R_PPC64_SECTOFF_LO_DS
;
1380 case BFD_RELOC_PPC64_TOC16_DS
: ppc_reloc
= R_PPC64_TOC16_DS
;
1382 case BFD_RELOC_PPC64_TOC16_LO_DS
: ppc_reloc
= R_PPC64_TOC16_LO_DS
;
1384 case BFD_RELOC_PPC64_PLTGOT16_DS
: ppc_reloc
= R_PPC64_PLTGOT16_DS
;
1386 case BFD_RELOC_PPC64_PLTGOT16_LO_DS
: ppc_reloc
= R_PPC64_PLTGOT16_LO_DS
;
1388 case BFD_RELOC_VTABLE_INHERIT
: ppc_reloc
= R_PPC64_GNU_VTINHERIT
;
1390 case BFD_RELOC_VTABLE_ENTRY
: ppc_reloc
= R_PPC64_GNU_VTENTRY
;
1394 return ppc64_elf_howto_table
[(int) ppc_reloc
];
1397 /* Set the howto pointer for a PowerPC ELF reloc. */
1400 ppc64_elf_info_to_howto (abfd
, cache_ptr
, dst
)
1401 bfd
*abfd ATTRIBUTE_UNUSED
;
1403 Elf64_Internal_Rela
*dst
;
1407 if (!ppc64_elf_howto_table
[R_PPC64_ADDR32
])
1408 /* Initialize howto table if needed. */
1411 type
= ELF64_R_TYPE (dst
->r_info
);
1412 BFD_ASSERT (type
< (sizeof (ppc64_elf_howto_table
)
1413 / sizeof (ppc64_elf_howto_table
[0])));
1414 cache_ptr
->howto
= ppc64_elf_howto_table
[type
];
1417 /* Handle the R_PPC_ADDR16_HA and similar relocs. */
1419 static bfd_reloc_status_type
1420 ppc64_elf_addr16_ha_reloc (abfd
, reloc_entry
, symbol
, data
, input_section
,
1421 output_bfd
, error_message
)
1422 bfd
*abfd ATTRIBUTE_UNUSED
;
1423 arelent
*reloc_entry
;
1425 PTR data ATTRIBUTE_UNUSED
;
1426 asection
*input_section
;
1428 char **error_message ATTRIBUTE_UNUSED
;
1432 if (output_bfd
!= NULL
)
1434 reloc_entry
->address
+= input_section
->output_offset
;
1435 return bfd_reloc_ok
;
1438 if (reloc_entry
->address
> input_section
->_cooked_size
)
1439 return bfd_reloc_outofrange
;
1441 if (bfd_is_com_section (symbol
->section
))
1444 relocation
= symbol
->value
;
1446 relocation
+= symbol
->section
->output_section
->vma
;
1447 relocation
+= symbol
->section
->output_offset
;
1448 relocation
+= reloc_entry
->addend
;
1450 reloc_entry
->addend
+= (relocation
& 0x8000) << 1;
1452 return bfd_reloc_continue
;
1455 /* Function to set whether a module needs the -mrelocatable bit set. */
1458 ppc64_elf_set_private_flags (abfd
, flags
)
1462 BFD_ASSERT (!elf_flags_init (abfd
)
1463 || elf_elfheader (abfd
)->e_flags
== flags
);
1465 elf_elfheader (abfd
)->e_flags
= flags
;
1466 elf_flags_init (abfd
) = true;
1470 /* Merge backend specific data from an object file to the output
1471 object file when linking. */
1473 ppc64_elf_merge_private_bfd_data (ibfd
, obfd
)
1481 /* Check if we have the same endianess. */
1482 if (ibfd
->xvec
->byteorder
!= obfd
->xvec
->byteorder
1483 && obfd
->xvec
->byteorder
!= BFD_ENDIAN_UNKNOWN
)
1487 if (bfd_big_endian (ibfd
))
1488 msg
= _("%s: compiled for a big endian system and target is little endian");
1490 msg
= _("%s: compiled for a little endian system and target is big endian");
1492 (*_bfd_error_handler
) (msg
, bfd_archive_filename (ibfd
));
1494 bfd_set_error (bfd_error_wrong_format
);
1498 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1499 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1502 new_flags
= elf_elfheader (ibfd
)->e_flags
;
1503 old_flags
= elf_elfheader (obfd
)->e_flags
;
1504 if (!elf_flags_init (obfd
))
1506 /* First call, no flags set. */
1507 elf_flags_init (obfd
) = true;
1508 elf_elfheader (obfd
)->e_flags
= new_flags
;
1511 else if (new_flags
== old_flags
)
1512 /* Compatible flags are ok. */
1517 /* Incompatible flags. Warn about -mrelocatable mismatch.
1518 Allow -mrelocatable-lib to be linked with either. */
1520 if ((new_flags
& EF_PPC_RELOCATABLE
) != 0
1521 && (old_flags
& (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
)) == 0)
1524 (*_bfd_error_handler
)
1525 (_("%s: compiled with -mrelocatable and linked with modules compiled normally"),
1526 bfd_archive_filename (ibfd
));
1528 else if ((new_flags
& (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
)) == 0
1529 && (old_flags
& EF_PPC_RELOCATABLE
) != 0)
1532 (*_bfd_error_handler
)
1533 (_("%s: compiled normally and linked with modules compiled with -mrelocatable"),
1534 bfd_archive_filename (ibfd
));
1537 /* The output is -mrelocatable-lib iff both the input files are. */
1538 if (! (new_flags
& EF_PPC_RELOCATABLE_LIB
))
1539 elf_elfheader (obfd
)->e_flags
&= ~EF_PPC_RELOCATABLE_LIB
;
1541 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
1542 but each input file is either -mrelocatable or -mrelocatable-lib. */
1543 if (! (elf_elfheader (obfd
)->e_flags
& EF_PPC_RELOCATABLE_LIB
)
1544 && (new_flags
& (EF_PPC_RELOCATABLE_LIB
| EF_PPC_RELOCATABLE
))
1545 && (old_flags
& (EF_PPC_RELOCATABLE_LIB
| EF_PPC_RELOCATABLE
)))
1546 elf_elfheader (obfd
)->e_flags
|= EF_PPC_RELOCATABLE
;
1548 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit
1549 if any module uses it. */
1550 elf_elfheader (obfd
)->e_flags
|= (new_flags
& EF_PPC_EMB
);
1552 new_flags
&= ~(EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
| EF_PPC_EMB
);
1553 old_flags
&= ~(EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
| EF_PPC_EMB
);
1555 /* Warn about any other mismatches. */
1556 if (new_flags
!= old_flags
)
1559 (*_bfd_error_handler
)
1560 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
1561 bfd_archive_filename (ibfd
), (long) new_flags
, (long) old_flags
);
1566 bfd_set_error (bfd_error_bad_value
);
1574 /* Handle a PowerPC specific section when reading an object file. This
1575 is called when elfcode.h finds a section with an unknown type. */
1578 ppc64_elf_section_from_shdr (abfd
, hdr
, name
)
1580 Elf64_Internal_Shdr
*hdr
;
1586 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1589 newsect
= hdr
->bfd_section
;
1590 flags
= bfd_get_section_flags (abfd
, newsect
);
1591 if (hdr
->sh_flags
& SHF_EXCLUDE
)
1592 flags
|= SEC_EXCLUDE
;
1594 if (hdr
->sh_type
== SHT_ORDERED
)
1595 flags
|= SEC_SORT_ENTRIES
;
1597 bfd_set_section_flags (abfd
, newsect
, flags
);
1601 /* The following functions are specific to the ELF linker, while
1602 functions above are used generally. Those named ppc64_elf_* are
1603 called by the main ELF linker code. They appear in this file more
1604 or less in the order in which they are called. eg.
1605 ppc64_elf_check_relocs is called early in the link process,
1606 ppc64_elf_finish_dynamic_sections is one of the last functions
1609 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
1610 functions have both a function code symbol and a function descriptor
1611 symbol. A call to foo in a relocatable object file looks like:
1618 The function definition in another object file might be:
1622 . .quad .TOC.@tocbase
1628 When the linker resolves the call during a static link, the branch
1629 unsurprisingly just goes to .foo and the .opd information is unused.
1630 If the function definition is in a shared library, things are a little
1631 different: The call goes via a plt call stub, the opd information gets
1632 copied to the plt, and the linker patches the nop.
1640 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
1641 . addi 12,12,Lfoo@toc@l # is slightly optimised, but
1642 . std 2,40(1) # this is the general idea
1650 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
1652 The "reloc ()" notation is supposed to indicate that the linker emits
1653 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
1656 What are the difficulties here? Well, firstly, the relocations
1657 examined by the linker in check_relocs are against the function code
1658 sym .foo, while the dynamic relocation in the plt is emitted against
1659 the function descriptor symbol, foo. Somewhere along the line, we need
1660 to carefully copy dynamic link information from one symbol to the other.
1661 Secondly, the generic part of the elf linker will make .foo a dynamic
1662 symbol as is normal for most other backends. We need foo dynamic
1663 instead, at least for an application final link. However, when
1664 creating a shared library containing foo, we need to have both symbols
1665 dynamic so that references to .foo are satisfied during the early
1666 stages of linking. Otherwise the linker might decide to pull in a
1667 definition from some other object, eg. a static library. */
1669 /* The linker needs to keep track of the number of relocs that it
1670 decides to copy as dynamic relocs in check_relocs for each symbol.
1671 This is so that it can later discard them if they are found to be
1672 unnecessary. We store the information in a field extending the
1673 regular ELF linker hash table. */
1675 struct ppc_dyn_relocs
1677 struct ppc_dyn_relocs
*next
;
1679 /* The input section of the reloc. */
1682 /* Total number of relocs copied for the input section. */
1683 bfd_size_type count
;
1685 /* Number of pc-relative relocs copied for the input section. */
1686 bfd_size_type pc_count
;
1689 /* Of those relocs that might be copied as dynamic relocs, this macro
1690 selects between relative and absolute types. */
1692 #define IS_ABSOLUTE_RELOC(RTYPE) \
1693 ((RTYPE) != R_PPC64_REL14 \
1694 && (RTYPE) != R_PPC64_REL14_BRNTAKEN \
1695 && (RTYPE) != R_PPC64_REL14_BRTAKEN \
1696 && (RTYPE) != R_PPC64_REL24 \
1697 && (RTYPE) != R_PPC64_REL32 \
1698 && (RTYPE) != R_PPC64_REL64)
1700 /* ppc64 ELF linker hash entry. */
1702 struct ppc_link_hash_entry
1704 struct elf_link_hash_entry elf
;
1706 /* Track dynamic relocs copied for this symbol. */
1707 struct ppc_dyn_relocs
*dyn_relocs
;
1709 /* Flag function code and descriptor symbols. */
1710 unsigned int is_func
:1;
1711 unsigned int is_func_descriptor
:1;
1714 /* ppc64 ELF linker hash table. */
1716 struct ppc_link_hash_table
1718 struct elf_link_hash_table elf
;
1720 /* Short-cuts to get to dynamic linker sections. */
1734 /* Small local sym to section mapping cache. */
1735 struct sym_sec_cache sym_sec
;
1738 /* Get the ppc64 ELF linker hash table from a link_info structure. */
1740 #define ppc_hash_table(p) \
1741 ((struct ppc_link_hash_table *) ((p)->hash))
1743 /* Create an entry in a ppc64 ELF linker hash table. */
1745 static struct bfd_hash_entry
*
1746 link_hash_newfunc (entry
, table
, string
)
1747 struct bfd_hash_entry
*entry
;
1748 struct bfd_hash_table
*table
;
1751 /* Allocate the structure if it has not already been allocated by a
1755 entry
= bfd_hash_allocate (table
, sizeof (struct ppc_link_hash_entry
));
1760 /* Call the allocation method of the superclass. */
1761 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
1764 struct ppc_link_hash_entry
*eh
= (struct ppc_link_hash_entry
*) entry
;
1766 eh
->dyn_relocs
= NULL
;
1768 eh
->is_func_descriptor
= 0;
1774 /* Create a ppc64 ELF linker hash table. */
1776 static struct bfd_link_hash_table
*
1777 ppc64_elf_link_hash_table_create (abfd
)
1780 struct ppc_link_hash_table
*htab
;
1781 bfd_size_type amt
= sizeof (struct ppc_link_hash_table
);
1783 htab
= (struct ppc_link_hash_table
*) bfd_alloc (abfd
, amt
);
1787 if (! _bfd_elf_link_hash_table_init (&htab
->elf
, abfd
, link_hash_newfunc
))
1789 bfd_release (abfd
, htab
);
1794 htab
->srelgot
= NULL
;
1796 htab
->srelplt
= NULL
;
1797 htab
->sdynbss
= NULL
;
1798 htab
->srelbss
= NULL
;
1800 htab
->sglink
= NULL
;
1802 htab
->plt_overflow
= 0;
1803 htab
->sym_sec
.abfd
= NULL
;
1805 return &htab
->elf
.root
;
1808 /* Create sections for linker generated code. */
1811 create_linkage_sections (dynobj
, info
)
1813 struct bfd_link_info
*info
;
1815 struct ppc_link_hash_table
*htab
;
1818 htab
= ppc_hash_table (info
);
1820 /* Create .sfpr for code to save and restore fp regs. */
1821 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_READONLY
1822 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
1823 htab
->sfpr
= bfd_make_section (dynobj
, ".sfpr");
1824 if (htab
->sfpr
== NULL
1825 || ! bfd_set_section_flags (dynobj
, htab
->sfpr
, flags
)
1826 || ! bfd_set_section_alignment (dynobj
, htab
->sfpr
, 2))
1829 /* Create .stub and .glink for global linkage functions. */
1830 htab
->sstub
= bfd_make_section (dynobj
, ".stub");
1831 if (htab
->sstub
== NULL
1832 || ! bfd_set_section_flags (dynobj
, htab
->sstub
, flags
)
1833 || ! bfd_set_section_alignment (dynobj
, htab
->sstub
, 2))
1835 htab
->sglink
= bfd_make_section (dynobj
, ".glink");
1836 if (htab
->sglink
== NULL
1837 || ! bfd_set_section_flags (dynobj
, htab
->sglink
, flags
)
1838 || ! bfd_set_section_alignment (dynobj
, htab
->sglink
, 2))
1844 /* Create .got and .rela.got sections in DYNOBJ, and set up
1845 shortcuts to them in our hash table. */
1848 create_got_section (dynobj
, info
)
1850 struct bfd_link_info
*info
;
1852 struct ppc_link_hash_table
*htab
;
1854 if (! _bfd_elf_create_got_section (dynobj
, info
))
1857 htab
= ppc_hash_table (info
);
1858 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
1862 htab
->srelgot
= bfd_make_section (dynobj
, ".rela.got");
1864 || ! bfd_set_section_flags (dynobj
, htab
->srelgot
,
1865 (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
1866 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
1868 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 3))
1873 /* Create the dynamic sections, and set up shortcuts. */
1876 ppc64_elf_create_dynamic_sections (dynobj
, info
)
1878 struct bfd_link_info
*info
;
1880 struct ppc_link_hash_table
*htab
;
1882 htab
= ppc_hash_table (info
);
1883 if (!htab
->sgot
&& !create_got_section (dynobj
, info
))
1886 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1889 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
1890 htab
->srelplt
= bfd_get_section_by_name (dynobj
, ".rela.plt");
1891 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
1893 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rela.bss");
1895 if (!htab
->splt
|| !htab
->srelplt
|| !htab
->sdynbss
1896 || (!info
->shared
&& !htab
->srelbss
))
1902 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1905 ppc64_elf_copy_indirect_symbol (dir
, ind
)
1906 struct elf_link_hash_entry
*dir
, *ind
;
1908 struct ppc_link_hash_entry
*edir
, *eind
;
1910 edir
= (struct ppc_link_hash_entry
*) dir
;
1911 eind
= (struct ppc_link_hash_entry
*) ind
;
1913 if (eind
->dyn_relocs
!= NULL
)
1915 if (edir
->dyn_relocs
!= NULL
)
1917 struct ppc_dyn_relocs
**pp
;
1918 struct ppc_dyn_relocs
*p
;
1920 if (ind
->root
.type
== bfd_link_hash_indirect
)
1923 /* Add reloc counts against the weak sym to the strong sym
1924 list. Merge any entries against the same section. */
1925 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1927 struct ppc_dyn_relocs
*q
;
1929 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1930 if (q
->sec
== p
->sec
)
1932 q
->pc_count
+= p
->pc_count
;
1933 q
->count
+= p
->count
;
1940 *pp
= edir
->dyn_relocs
;
1943 edir
->dyn_relocs
= eind
->dyn_relocs
;
1944 eind
->dyn_relocs
= NULL
;
1947 edir
->is_func
|= eind
->is_func
;
1948 edir
->is_func_descriptor
|= eind
->is_func_descriptor
;
1950 _bfd_elf_link_hash_copy_indirect (dir
, ind
);
1953 /* Look through the relocs for a section during the first phase, and
1954 calculate needed space in the global offset table, procedure
1955 linkage table, and dynamic reloc sections. */
1958 ppc64_elf_check_relocs (abfd
, info
, sec
, relocs
)
1960 struct bfd_link_info
*info
;
1962 const Elf_Internal_Rela
*relocs
;
1964 struct ppc_link_hash_table
*htab
;
1965 Elf_Internal_Shdr
*symtab_hdr
;
1966 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
1967 const Elf_Internal_Rela
*rel
;
1968 const Elf_Internal_Rela
*rel_end
;
1972 if (info
->relocateable
)
1975 htab
= ppc_hash_table (info
);
1976 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1978 sym_hashes
= elf_sym_hashes (abfd
);
1979 sym_hashes_end
= (sym_hashes
1980 + symtab_hdr
->sh_size
/ sizeof (Elf64_External_Sym
));
1981 if (!elf_bad_symtab (abfd
))
1982 sym_hashes_end
-= symtab_hdr
->sh_info
;
1985 is_opd
= strcmp (bfd_get_section_name (abfd
, sec
), ".opd") == 0;
1987 if (htab
->elf
.dynobj
== NULL
)
1988 htab
->elf
.dynobj
= abfd
;
1989 if (htab
->sfpr
== NULL
1990 && !create_linkage_sections (htab
->elf
.dynobj
, info
))
1993 rel_end
= relocs
+ sec
->reloc_count
;
1994 for (rel
= relocs
; rel
< rel_end
; rel
++)
1996 unsigned long r_symndx
;
1997 struct elf_link_hash_entry
*h
;
1998 enum elf_ppc_reloc_type r_type
;
2000 r_symndx
= ELF64_R_SYM (rel
->r_info
);
2001 if (r_symndx
< symtab_hdr
->sh_info
)
2004 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2006 r_type
= (enum elf_ppc_reloc_type
) ELF64_R_TYPE (rel
->r_info
);
2009 /* GOT16 relocations */
2011 case R_PPC64_GOT16_DS
:
2012 case R_PPC64_GOT16_HA
:
2013 case R_PPC64_GOT16_HI
:
2014 case R_PPC64_GOT16_LO
:
2015 case R_PPC64_GOT16_LO_DS
:
2017 /* This symbol requires a global offset table entry. */
2018 if (htab
->sgot
== NULL
2019 && !create_got_section (htab
->elf
.dynobj
, info
))
2024 h
->got
.refcount
+= 1;
2028 bfd_signed_vma
*local_got_refcounts
;
2030 /* This is a global offset table entry for a local symbol. */
2031 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2032 if (local_got_refcounts
== NULL
)
2036 size
= symtab_hdr
->sh_info
;
2037 size
*= sizeof (bfd_signed_vma
);
2038 local_got_refcounts
= ((bfd_signed_vma
*)
2039 bfd_zalloc (abfd
, size
));
2040 if (local_got_refcounts
== NULL
)
2042 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2044 local_got_refcounts
[r_symndx
] += 1;
2048 case R_PPC64_PLT16_HA
:
2049 case R_PPC64_PLT16_HI
:
2050 case R_PPC64_PLT16_LO
:
2053 /* This symbol requires a procedure linkage table entry. We
2054 actually build the entry in adjust_dynamic_symbol,
2055 because this might be a case of linking PIC code without
2056 linking in any dynamic objects, in which case we don't
2057 need to generate a procedure linkage table after all. */
2060 /* It does not make sense to have a procedure linkage
2061 table entry for a local symbol. */
2062 bfd_set_error (bfd_error_bad_value
);
2066 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
2067 h
->plt
.refcount
+= 1;
2068 ((struct ppc_link_hash_entry
*) h
)->is_func
= 1;
2071 /* The following relocations don't need to propagate the
2072 relocation if linking a shared object since they are
2073 section relative. */
2074 case R_PPC64_SECTOFF
:
2075 case R_PPC64_SECTOFF_LO
:
2076 case R_PPC64_SECTOFF_HI
:
2077 case R_PPC64_SECTOFF_HA
:
2078 case R_PPC64_SECTOFF_DS
:
2079 case R_PPC64_SECTOFF_LO_DS
:
2081 case R_PPC64_TOC16_LO
:
2082 case R_PPC64_TOC16_HI
:
2083 case R_PPC64_TOC16_HA
:
2084 case R_PPC64_TOC16_DS
:
2085 case R_PPC64_TOC16_LO_DS
:
2088 /* This relocation describes the C++ object vtable hierarchy.
2089 Reconstruct it for later use during GC. */
2090 case R_PPC64_GNU_VTINHERIT
:
2091 if (!_bfd_elf64_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2095 /* This relocation describes which C++ vtable entries are actually
2096 used. Record for later use during GC. */
2097 case R_PPC64_GNU_VTENTRY
:
2098 if (!_bfd_elf64_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2104 && h
->root
.root
.string
[0] == '.'
2105 && h
->root
.root
.string
[1] != 0)
2107 /* We may need a .plt entry if the function this reloc
2108 refers to is in a shared lib. */
2109 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
2110 h
->plt
.refcount
+= 1;
2111 ((struct ppc_link_hash_entry
*) h
)->is_func
= 1;
2115 case R_PPC64_ADDR64
:
2118 && h
->root
.root
.string
[0] == '.'
2119 && h
->root
.root
.string
[1] != 0)
2121 struct elf_link_hash_entry
*fdh
;
2123 fdh
= elf_link_hash_lookup (&htab
->elf
, h
->root
.root
.string
+ 1,
2124 false, false, false);
2127 /* Ensure the function descriptor symbol string is
2128 part of the code symbol string. We aren't
2129 changing the name here, just allowing some tricks
2130 in ppc64_elf_hide_symbol. */
2131 fdh
->root
.root
.string
= h
->root
.root
.string
+ 1;
2132 ((struct ppc_link_hash_entry
*) fdh
)->is_func_descriptor
= 1;
2133 ((struct ppc_link_hash_entry
*) h
)->is_func
= 1;
2141 case R_PPC64_REL14_BRTAKEN
:
2142 case R_PPC64_REL14_BRNTAKEN
:
2143 case R_PPC64_ADDR14
:
2144 case R_PPC64_ADDR14_BRNTAKEN
:
2145 case R_PPC64_ADDR14_BRTAKEN
:
2146 case R_PPC64_ADDR16
:
2147 case R_PPC64_ADDR16_DS
:
2148 case R_PPC64_ADDR16_HA
:
2149 case R_PPC64_ADDR16_HI
:
2150 case R_PPC64_ADDR16_HIGHER
:
2151 case R_PPC64_ADDR16_HIGHERA
:
2152 case R_PPC64_ADDR16_HIGHEST
:
2153 case R_PPC64_ADDR16_HIGHESTA
:
2154 case R_PPC64_ADDR16_LO
:
2155 case R_PPC64_ADDR16_LO_DS
:
2156 case R_PPC64_ADDR24
:
2157 case R_PPC64_ADDR30
:
2158 case R_PPC64_ADDR32
:
2159 case R_PPC64_UADDR16
:
2160 case R_PPC64_UADDR32
:
2161 case R_PPC64_UADDR64
:
2163 /* Don't propagate .opd relocs. */
2164 if (NO_OPD_RELOCS
&& is_opd
)
2167 /* If we are creating a shared library, and this is a reloc
2168 against a global symbol, or a non PC relative reloc
2169 against a local symbol, then we need to copy the reloc
2170 into the shared library. However, if we are linking with
2171 -Bsymbolic, we do not need to copy a reloc against a
2172 global symbol which is defined in an object we are
2173 including in the link (i.e., DEF_REGULAR is set). At
2174 this point we have not seen all the input files, so it is
2175 possible that DEF_REGULAR is not set now but will be set
2176 later (it is never cleared). In case of a weak definition,
2177 DEF_REGULAR may be cleared later by a strong definition in
2178 a shared library. We account for that possibility below by
2179 storing information in the relocs_copied field of the hash
2180 table entry. A similar situation occurs when creating
2181 shared libraries and symbol visibility changes render the
2184 If on the other hand, we are creating an executable, we
2185 may need to keep relocations for symbols satisfied by a
2186 dynamic library if we manage to avoid copy relocs for the
2189 && (sec
->flags
& SEC_ALLOC
) != 0
2190 && (IS_ABSOLUTE_RELOC (r_type
)
2192 && (! info
->symbolic
2193 || h
->root
.type
== bfd_link_hash_defweak
2194 || (h
->elf_link_hash_flags
2195 & ELF_LINK_HASH_DEF_REGULAR
) == 0))))
2197 && (sec
->flags
& SEC_ALLOC
) != 0
2199 && (h
->root
.type
== bfd_link_hash_defweak
2200 || (h
->elf_link_hash_flags
2201 & ELF_LINK_HASH_DEF_REGULAR
) == 0)))
2203 struct ppc_dyn_relocs
*p
;
2204 struct ppc_dyn_relocs
**head
;
2206 /* We must copy these reloc types into the output file.
2207 Create a reloc section in dynobj and make room for
2214 name
= (bfd_elf_string_from_elf_section
2216 elf_elfheader (abfd
)->e_shstrndx
,
2217 elf_section_data (sec
)->rel_hdr
.sh_name
));
2221 if (strncmp (name
, ".rela", 5) != 0
2222 || strcmp (bfd_get_section_name (abfd
, sec
),
2225 (*_bfd_error_handler
)
2226 (_("%s: bad relocation section name `%s\'"),
2227 bfd_archive_filename (abfd
), name
);
2228 bfd_set_error (bfd_error_bad_value
);
2231 dynobj
= htab
->elf
.dynobj
;
2232 sreloc
= bfd_get_section_by_name (dynobj
, name
);
2237 sreloc
= bfd_make_section (dynobj
, name
);
2238 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
2239 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
2240 if ((sec
->flags
& SEC_ALLOC
) != 0)
2241 flags
|= SEC_ALLOC
| SEC_LOAD
;
2243 || ! bfd_set_section_flags (dynobj
, sreloc
, flags
)
2244 || ! bfd_set_section_alignment (dynobj
, sreloc
, 3))
2247 elf_section_data (sec
)->sreloc
= sreloc
;
2250 /* If this is a global symbol, we count the number of
2251 relocations we need for this symbol. */
2254 head
= &((struct ppc_link_hash_entry
*) h
)->dyn_relocs
;
2258 /* Track dynamic relocs needed for local syms too.
2259 We really need local syms available to do this
2263 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
2268 head
= ((struct ppc_dyn_relocs
**)
2269 &elf_section_data (s
)->local_dynrel
);
2273 if (p
== NULL
|| p
->sec
!= sec
)
2275 p
= ((struct ppc_dyn_relocs
*)
2276 bfd_alloc (htab
->elf
.dynobj
,
2277 (bfd_size_type
) sizeof *p
));
2288 if (!IS_ABSOLUTE_RELOC (r_type
))
2300 /* Return the section that should be marked against GC for a given
2304 ppc64_elf_gc_mark_hook (abfd
, info
, rel
, h
, sym
)
2306 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2307 Elf_Internal_Rela
*rel
;
2308 struct elf_link_hash_entry
*h
;
2309 Elf_Internal_Sym
*sym
;
2313 enum elf_ppc_reloc_type r_type
;
2315 r_type
= (enum elf_ppc_reloc_type
) ELF64_R_TYPE (rel
->r_info
);
2318 case R_PPC64_GNU_VTINHERIT
:
2319 case R_PPC64_GNU_VTENTRY
:
2323 switch (h
->root
.type
)
2325 case bfd_link_hash_defined
:
2326 case bfd_link_hash_defweak
:
2327 return h
->root
.u
.def
.section
;
2329 case bfd_link_hash_common
:
2330 return h
->root
.u
.c
.p
->section
;
2339 return bfd_section_from_elf_index (abfd
, sym
->st_shndx
);
2345 /* Update the .got, .plt. and dynamic reloc reference counts for the
2346 section being removed. */
2349 ppc64_elf_gc_sweep_hook (abfd
, info
, sec
, relocs
)
2351 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2353 const Elf_Internal_Rela
*relocs
;
2355 Elf_Internal_Shdr
*symtab_hdr
;
2356 struct elf_link_hash_entry
**sym_hashes
;
2357 bfd_signed_vma
*local_got_refcounts
;
2358 const Elf_Internal_Rela
*rel
, *relend
;
2360 elf_section_data (sec
)->local_dynrel
= NULL
;
2362 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2363 sym_hashes
= elf_sym_hashes (abfd
);
2364 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2366 relend
= relocs
+ sec
->reloc_count
;
2367 for (rel
= relocs
; rel
< relend
; rel
++)
2369 unsigned long r_symndx
;
2370 enum elf_ppc_reloc_type r_type
;
2371 struct elf_link_hash_entry
*h
;
2373 r_symndx
= ELF64_R_SYM (rel
->r_info
);
2374 r_type
= (enum elf_ppc_reloc_type
) ELF64_R_TYPE (rel
->r_info
);
2378 case R_PPC64_GOT16_DS
:
2379 case R_PPC64_GOT16_HA
:
2380 case R_PPC64_GOT16_HI
:
2381 case R_PPC64_GOT16_LO
:
2382 case R_PPC64_GOT16_LO_DS
:
2383 if (r_symndx
>= symtab_hdr
->sh_info
)
2385 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2386 if (h
->got
.refcount
> 0)
2391 if (local_got_refcounts
[r_symndx
] > 0)
2392 local_got_refcounts
[r_symndx
]--;
2396 case R_PPC64_PLT16_HA
:
2397 case R_PPC64_PLT16_HI
:
2398 case R_PPC64_PLT16_LO
:
2401 if (r_symndx
>= symtab_hdr
->sh_info
)
2403 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2404 if (h
->plt
.refcount
> 0)
2410 if (r_symndx
>= symtab_hdr
->sh_info
)
2412 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2413 if (h
->plt
.refcount
> 0)
2419 case R_PPC64_REL14_BRNTAKEN
:
2420 case R_PPC64_REL14_BRTAKEN
:
2423 if (r_symndx
>= symtab_hdr
->sh_info
)
2425 struct ppc_link_hash_entry
*eh
;
2426 struct ppc_dyn_relocs
**pp
;
2427 struct ppc_dyn_relocs
*p
;
2429 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2430 eh
= (struct ppc_link_hash_entry
*) h
;
2432 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2444 case R_PPC64_ADDR14
:
2445 case R_PPC64_ADDR14_BRNTAKEN
:
2446 case R_PPC64_ADDR14_BRTAKEN
:
2447 case R_PPC64_ADDR16
:
2448 case R_PPC64_ADDR16_DS
:
2449 case R_PPC64_ADDR16_HA
:
2450 case R_PPC64_ADDR16_HI
:
2451 case R_PPC64_ADDR16_HIGHER
:
2452 case R_PPC64_ADDR16_HIGHERA
:
2453 case R_PPC64_ADDR16_HIGHEST
:
2454 case R_PPC64_ADDR16_HIGHESTA
:
2455 case R_PPC64_ADDR16_LO
:
2456 case R_PPC64_ADDR16_LO_DS
:
2457 case R_PPC64_ADDR24
:
2458 case R_PPC64_ADDR30
:
2459 case R_PPC64_ADDR32
:
2460 case R_PPC64_ADDR64
:
2461 case R_PPC64_UADDR16
:
2462 case R_PPC64_UADDR32
:
2463 case R_PPC64_UADDR64
:
2465 if (r_symndx
>= symtab_hdr
->sh_info
)
2467 struct ppc_link_hash_entry
*eh
;
2468 struct ppc_dyn_relocs
**pp
;
2469 struct ppc_dyn_relocs
*p
;
2471 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2472 eh
= (struct ppc_link_hash_entry
*) h
;
2474 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2492 /* Called via elf_link_hash_traverse to transfer dynamic linking
2493 information on function code symbol entries to their corresponding
2494 function descriptor symbol entries. */
2496 func_desc_adjust (h
, inf
)
2497 struct elf_link_hash_entry
*h
;
2500 struct bfd_link_info
*info
;
2501 struct ppc_link_hash_table
*htab
;
2503 if (h
->root
.type
== bfd_link_hash_indirect
2504 || h
->root
.type
== bfd_link_hash_warning
)
2507 info
= (struct bfd_link_info
*) inf
;
2508 htab
= ppc_hash_table (info
);
2510 /* If this is a function code symbol, transfer dynamic linking
2511 information to the function descriptor symbol. */
2512 if (!((struct ppc_link_hash_entry
*) h
)->is_func
)
2515 if (h
->plt
.refcount
> 0
2516 && h
->root
.root
.string
[0] == '.'
2517 && h
->root
.root
.string
[1] != '\0')
2519 struct elf_link_hash_entry
*fdh
;
2520 boolean force_local
;
2522 /* Find the corresponding function descriptor symbol. Create it
2523 as undefined if necessary. */
2525 fdh
= elf_link_hash_lookup (&htab
->elf
, h
->root
.root
.string
+ 1,
2526 false, false, true);
2530 && (h
->root
.type
== bfd_link_hash_undefined
2531 || h
->root
.type
== bfd_link_hash_undefweak
))
2536 abfd
= h
->root
.u
.undef
.abfd
;
2537 newsym
= bfd_make_empty_symbol (abfd
);
2538 newsym
->name
= h
->root
.root
.string
+ 1;
2539 newsym
->section
= bfd_und_section_ptr
;
2541 newsym
->flags
= BSF_OBJECT
;
2542 if (h
->root
.type
== bfd_link_hash_undefweak
)
2543 newsym
->flags
|= BSF_WEAK
;
2545 if ( !(_bfd_generic_link_add_one_symbol
2546 (info
, abfd
, newsym
->name
, newsym
->flags
,
2547 newsym
->section
, newsym
->value
, NULL
, false, false,
2548 (struct bfd_link_hash_entry
**) &fdh
)))
2552 fdh
->elf_link_hash_flags
&= ~ELF_LINK_NON_ELF
;
2556 && (fdh
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0
2558 || (fdh
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2559 || (fdh
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0))
2561 if (fdh
->dynindx
== -1)
2562 if (! bfd_elf64_link_record_dynamic_symbol (info
, fdh
))
2564 fdh
->elf_link_hash_flags
|= (h
->elf_link_hash_flags
2565 & (ELF_LINK_HASH_REF_REGULAR
2566 | ELF_LINK_HASH_REF_DYNAMIC
2567 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
2568 | ELF_LINK_NON_GOT_REF
));
2569 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
2571 fdh
->plt
.refcount
= h
->plt
.refcount
;
2572 fdh
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
2574 ((struct ppc_link_hash_entry
*) fdh
)->is_func_descriptor
= 1;
2575 fdh
->root
.root
.string
= h
->root
.root
.string
+ 1;
2578 /* Now that the info is on the function descriptor, clear the
2579 function code sym info. Any function code syms for which we
2580 don't have a definition in a regular file, we force local.
2581 This prevents a shared library from exporting syms that have
2582 been imported from another library. Function code syms that
2583 are really in the library we must leave global to prevent the
2584 linker dragging in a definition from a static library. */
2585 force_local
= ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
2587 _bfd_elf_link_hash_hide_symbol (info
, h
, force_local
);
2593 #define MIN_SAVE_FPR 14
2594 #define MAX_SAVE_FPR 31
2596 /* Called near the start of bfd_elf_size_dynamic_sections. We use
2597 this hook to a) provide some gcc support functions, and b) transfer
2598 dynamic linking information gathered so far on function code symbol
2599 entries, to their corresponding function descriptor symbol entries. */
2601 ppc64_elf_func_desc_adjust (obfd
, info
)
2602 bfd
*obfd ATTRIBUTE_UNUSED
;
2603 struct bfd_link_info
*info
;
2605 struct ppc_link_hash_table
*htab
;
2606 unsigned int lowest_savef
= MAX_SAVE_FPR
+ 2;
2607 unsigned int lowest_restf
= MAX_SAVE_FPR
+ 2;
2609 struct elf_link_hash_entry
*h
;
2612 htab
= ppc_hash_table (info
);
2614 if (htab
->sfpr
== NULL
)
2615 /* We don't have any relocs. */
2618 /* First provide any missing ._savef* and ._restf* functions. */
2619 memcpy (sym
, "._savef14", 10);
2620 for (i
= MIN_SAVE_FPR
; i
<= MAX_SAVE_FPR
; i
++)
2622 sym
[7] = i
/ 10 + '0';
2623 sym
[8] = i
% 10 + '0';
2624 h
= elf_link_hash_lookup (&htab
->elf
, sym
, false, false, true);
2626 && h
->root
.type
== bfd_link_hash_undefined
)
2628 if (lowest_savef
> i
)
2630 h
->root
.type
= bfd_link_hash_defined
;
2631 h
->root
.u
.def
.section
= htab
->sfpr
;
2632 h
->root
.u
.def
.value
= (i
- lowest_savef
) * 4;
2634 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
2635 _bfd_elf_link_hash_hide_symbol (info
, h
, info
->shared
);
2639 memcpy (sym
, "._restf14", 10);
2640 for (i
= MIN_SAVE_FPR
; i
<= MAX_SAVE_FPR
; i
++)
2642 sym
[7] = i
/ 10 + '0';
2643 sym
[8] = i
% 10 + '0';
2644 h
= elf_link_hash_lookup (&htab
->elf
, sym
, false, false, true);
2646 && h
->root
.type
== bfd_link_hash_undefined
)
2648 if (lowest_restf
> i
)
2650 h
->root
.type
= bfd_link_hash_defined
;
2651 h
->root
.u
.def
.section
= htab
->sfpr
;
2652 h
->root
.u
.def
.value
= ((MAX_SAVE_FPR
+ 2 - lowest_savef
) * 4
2653 + (i
- lowest_restf
) * 4);
2655 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
2656 _bfd_elf_link_hash_hide_symbol (info
, h
, info
->shared
);
2660 htab
->sfpr
->_raw_size
= ((MAX_SAVE_FPR
+ 2 - lowest_savef
) * 4
2661 + (MAX_SAVE_FPR
+ 2 - lowest_restf
) * 4);
2663 if (htab
->sfpr
->_raw_size
== 0)
2665 _bfd_strip_section_from_output (info
, htab
->sfpr
);
2669 bfd_byte
*p
= (bfd_byte
*) bfd_alloc (htab
->elf
.dynobj
,
2670 htab
->sfpr
->_raw_size
);
2673 htab
->sfpr
->contents
= p
;
2675 for (i
= lowest_savef
; i
<= MAX_SAVE_FPR
; i
++)
2677 unsigned int fpr
= i
<< 21;
2678 unsigned int stackoff
= (1 << 16) - (MAX_SAVE_FPR
+ 1 - i
) * 8;
2679 bfd_put_32 (htab
->elf
.dynobj
, STFD_FR0_0R1
+ fpr
+ stackoff
, p
);
2682 bfd_put_32 (htab
->elf
.dynobj
, BLR
, p
);
2685 for (i
= lowest_restf
; i
<= MAX_SAVE_FPR
; i
++)
2687 unsigned int fpr
= i
<< 21;
2688 unsigned int stackoff
= (1 << 16) - (MAX_SAVE_FPR
+ 1 - i
) * 8;
2689 bfd_put_32 (htab
->elf
.dynobj
, LFD_FR0_0R1
+ fpr
+ stackoff
, p
);
2692 bfd_put_32 (htab
->elf
.dynobj
, BLR
, p
);
2696 elf_link_hash_traverse (&htab
->elf
, func_desc_adjust
, (PTR
) info
);
2700 /* Adjust a symbol defined by a dynamic object and referenced by a
2701 regular object. The current definition is in some section of the
2702 dynamic object, but we're not including those sections. We have to
2703 change the definition to something the rest of the link can
2707 ppc64_elf_adjust_dynamic_symbol (info
, h
)
2708 struct bfd_link_info
*info
;
2709 struct elf_link_hash_entry
*h
;
2711 struct ppc_link_hash_table
*htab
;
2712 struct ppc_link_hash_entry
* eh
;
2713 struct ppc_dyn_relocs
*p
;
2715 unsigned int power_of_two
;
2717 htab
= ppc_hash_table (info
);
2719 /* Deal with function syms. */
2720 if (h
->type
== STT_FUNC
2721 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0)
2723 /* Clear procedure linkage table information for any symbol that
2724 won't need a .plt entry. */
2725 if (!((struct ppc_link_hash_entry
*) h
)->is_func_descriptor
2726 || h
->plt
.refcount
<= 0
2727 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0
2729 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
2730 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) == 0))
2732 h
->plt
.offset
= (bfd_vma
) -1;
2733 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
2738 h
->plt
.offset
= (bfd_vma
) -1;
2740 /* If this is a weak symbol, and there is a real definition, the
2741 processor independent code will have arranged for us to see the
2742 real definition first, and we can just use the same value. */
2743 if (h
->weakdef
!= NULL
)
2745 BFD_ASSERT (h
->weakdef
->root
.type
== bfd_link_hash_defined
2746 || h
->weakdef
->root
.type
== bfd_link_hash_defweak
);
2747 h
->root
.u
.def
.section
= h
->weakdef
->root
.u
.def
.section
;
2748 h
->root
.u
.def
.value
= h
->weakdef
->root
.u
.def
.value
;
2752 /* This is a reference to a symbol defined by a dynamic object which
2753 is not a function. */
2755 /* If we are creating a shared library, we must presume that the
2756 only references to the symbol are via the global offset table.
2757 For such cases we need not do anything here; the relocations will
2758 be handled correctly by relocate_section. */
2762 /* If there are no references to this symbol that do not use the
2763 GOT, we don't need to generate a copy reloc. */
2764 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0)
2767 eh
= (struct ppc_link_hash_entry
*) h
;
2768 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2770 s
= p
->sec
->output_section
;
2771 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2775 /* If we didn't find any dynamic relocs in read-only sections, then
2776 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2779 h
->elf_link_hash_flags
&= ~ELF_LINK_NON_GOT_REF
;
2783 /* We must allocate the symbol in our .dynbss section, which will
2784 become part of the .bss section of the executable. There will be
2785 an entry for this symbol in the .dynsym section. The dynamic
2786 object will contain position independent code, so all references
2787 from the dynamic object to this symbol will go through the global
2788 offset table. The dynamic linker will use the .dynsym entry to
2789 determine the address it must put in the global offset table, so
2790 both the dynamic object and the regular object will refer to the
2791 same memory location for the variable. */
2793 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
2794 copy the initial value out of the dynamic object and into the
2795 runtime process image. We need to remember the offset into the
2796 .rela.bss section we are going to use. */
2797 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
2799 htab
->srelbss
->_raw_size
+= sizeof (Elf64_External_Rela
);
2800 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_COPY
;
2803 /* We need to figure out the alignment required for this symbol. I
2804 have no idea how ELF linkers handle this. */
2805 power_of_two
= bfd_log2 (h
->size
);
2806 if (power_of_two
> 4)
2809 /* Apply the required alignment. */
2811 s
->_raw_size
= BFD_ALIGN (s
->_raw_size
, (bfd_size_type
) (1 << power_of_two
));
2812 if (power_of_two
> bfd_get_section_alignment (htab
->elf
.dynobj
, s
))
2814 if (! bfd_set_section_alignment (htab
->elf
.dynobj
, s
, power_of_two
))
2818 /* Define the symbol as being at this point in the section. */
2819 h
->root
.u
.def
.section
= s
;
2820 h
->root
.u
.def
.value
= s
->_raw_size
;
2822 /* Increment the section size to make room for the symbol. */
2823 s
->_raw_size
+= h
->size
;
2828 /* If given a function descriptor symbol, hide both the function code
2829 sym and the descriptor. */
2831 ppc64_elf_hide_symbol (info
, h
, force_local
)
2832 struct bfd_link_info
*info
;
2833 struct elf_link_hash_entry
*h
;
2834 boolean force_local
;
2836 _bfd_elf_link_hash_hide_symbol (info
, h
, force_local
);
2838 if (((struct ppc_link_hash_entry
*) h
)->is_func_descriptor
)
2841 struct elf_link_hash_entry
*fh
;
2842 struct ppc_link_hash_table
*htab
;
2844 name
= h
->root
.root
.string
- 1;
2845 htab
= ppc_hash_table (info
);
2846 fh
= elf_link_hash_lookup (&htab
->elf
, name
, false, false, false);
2848 _bfd_elf_link_hash_hide_symbol (info
, fh
, force_local
);
2852 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
2853 will be called from elflink.h. If elflink.h doesn't call our
2854 finish_dynamic_symbol routine, we'll need to do something about
2855 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
2856 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
2858 && ((INFO)->shared \
2859 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
2860 && ((H)->dynindx != -1 \
2861 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
2863 /* Allocate space in .plt, .got and associated reloc sections for
2867 allocate_dynrelocs (h
, inf
)
2868 struct elf_link_hash_entry
*h
;
2871 struct bfd_link_info
*info
;
2872 struct ppc_link_hash_table
*htab
;
2874 struct ppc_link_hash_entry
*eh
;
2875 struct ppc_dyn_relocs
*p
;
2877 if (h
->root
.type
== bfd_link_hash_indirect
2878 || h
->root
.type
== bfd_link_hash_warning
)
2881 info
= (struct bfd_link_info
*) inf
;
2882 htab
= ppc_hash_table (info
);
2884 if (htab
->elf
.dynamic_sections_created
2885 && h
->plt
.refcount
> 0
2886 && h
->dynindx
!= -1)
2888 BFD_ASSERT (((struct ppc_link_hash_entry
*) h
)->is_func_descriptor
);
2890 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info
, h
))
2892 /* If this is the first .plt entry, make room for the special
2895 if (s
->_raw_size
== 0)
2896 s
->_raw_size
+= PLT_INITIAL_ENTRY_SIZE
;
2898 h
->plt
.offset
= s
->_raw_size
;
2900 /* Make room for this entry. */
2901 s
->_raw_size
+= PLT_ENTRY_SIZE
;
2903 /* Make room for the .stub and .glink code. */
2905 s
->_raw_size
+= PLT_CALL_STUB_SIZE
;
2908 if (s
->_raw_size
== 0)
2909 s
->_raw_size
+= GLINK_CALL_STUB_SIZE
;
2910 /* We need bigger stubs past index 32767. */
2911 if (s
->_raw_size
>= GLINK_CALL_STUB_SIZE
+ 32768*2*4)
2913 s
->_raw_size
+= 2*4;
2915 /* We also need to make an entry in the .rela.plt section. */
2917 s
->_raw_size
+= sizeof (Elf64_External_Rela
);
2921 h
->plt
.offset
= (bfd_vma
) -1;
2922 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
2927 h
->plt
.offset
= (bfd_vma
) -1;
2928 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
2931 if (h
->got
.refcount
> 0)
2935 /* Make sure this symbol is output as a dynamic symbol.
2936 Undefined weak syms won't yet be marked as dynamic. */
2937 if (h
->dynindx
== -1
2938 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
2940 if (! bfd_elf64_link_record_dynamic_symbol (info
, h
))
2945 h
->got
.offset
= s
->_raw_size
;
2947 dyn
= htab
->elf
.dynamic_sections_created
;
2948 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
, h
))
2949 htab
->srelgot
->_raw_size
+= sizeof (Elf64_External_Rela
);
2952 h
->got
.offset
= (bfd_vma
) -1;
2954 eh
= (struct ppc_link_hash_entry
*) h
;
2955 if (eh
->dyn_relocs
== NULL
)
2958 /* In the shared -Bsymbolic case, discard space allocated for
2959 dynamic pc-relative relocs against symbols which turn out to be
2960 defined in regular objects. For the normal shared case, discard
2961 space for relocs that have become local due to symbol visibility
2966 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0
2967 && ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0
2970 struct ppc_dyn_relocs
**pp
;
2972 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2974 p
->count
-= p
->pc_count
;
2985 /* For the non-shared case, discard space for relocs against
2986 symbols which turn out to need copy relocs or are not
2989 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0
2990 && (((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2991 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2992 || (htab
->elf
.dynamic_sections_created
2993 && (h
->root
.type
== bfd_link_hash_undefweak
2994 || h
->root
.type
== bfd_link_hash_undefined
))))
2996 /* Make sure this symbol is output as a dynamic symbol.
2997 Undefined weak syms won't yet be marked as dynamic. */
2998 if (h
->dynindx
== -1
2999 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
3001 if (! bfd_elf64_link_record_dynamic_symbol (info
, h
))
3005 /* If that succeeded, we know we'll be keeping all the
3007 if (h
->dynindx
!= -1)
3011 eh
->dyn_relocs
= NULL
;
3016 /* Finally, allocate space. */
3017 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3019 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
3020 sreloc
->_raw_size
+= p
->count
* sizeof (Elf64_External_Rela
);
3026 /* Find any dynamic relocs that apply to read-only sections. */
3029 readonly_dynrelocs (h
, inf
)
3030 struct elf_link_hash_entry
*h
;
3033 struct ppc_link_hash_entry
*eh
;
3034 struct ppc_dyn_relocs
*p
;
3036 eh
= (struct ppc_link_hash_entry
*) h
;
3037 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3039 asection
*s
= p
->sec
->output_section
;
3041 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
3043 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
3045 info
->flags
|= DF_TEXTREL
;
3047 /* Not an error, just cut short the traversal. */
3054 /* Set the sizes of the dynamic sections. */
3057 ppc64_elf_size_dynamic_sections (output_bfd
, info
)
3058 bfd
*output_bfd ATTRIBUTE_UNUSED
;
3059 struct bfd_link_info
*info
;
3061 struct ppc_link_hash_table
*htab
;
3067 htab
= ppc_hash_table (info
);
3068 dynobj
= htab
->elf
.dynobj
;
3072 if (htab
->elf
.dynamic_sections_created
)
3074 /* Set the contents of the .interp section to the interpreter. */
3077 s
= bfd_get_section_by_name (dynobj
, ".interp");
3080 s
->_raw_size
= sizeof ELF_DYNAMIC_INTERPRETER
;
3081 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
3085 /* Set up .got offsets for local syms, and space for local dynamic
3087 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
3089 bfd_signed_vma
*local_got
;
3090 bfd_signed_vma
*end_local_got
;
3091 bfd_size_type locsymcount
;
3092 Elf_Internal_Shdr
*symtab_hdr
;
3095 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
3098 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3100 struct ppc_dyn_relocs
*p
;
3102 for (p
= *((struct ppc_dyn_relocs
**)
3103 &elf_section_data (s
)->local_dynrel
);
3107 if (!bfd_is_abs_section (p
->sec
)
3108 && bfd_is_abs_section (p
->sec
->output_section
))
3110 /* Input section has been discarded, either because
3111 it is a copy of a linkonce section or due to
3112 linker script /DISCARD/, so we'll be discarding
3115 else if (p
->count
!= 0)
3117 srel
= elf_section_data (p
->sec
)->sreloc
;
3118 srel
->_raw_size
+= p
->count
* sizeof (Elf64_External_Rela
);
3119 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
3120 info
->flags
|= DF_TEXTREL
;
3125 local_got
= elf_local_got_refcounts (ibfd
);
3129 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
3130 locsymcount
= symtab_hdr
->sh_info
;
3131 end_local_got
= local_got
+ locsymcount
;
3133 srel
= htab
->srelgot
;
3134 for (; local_got
< end_local_got
; ++local_got
)
3138 *local_got
= s
->_raw_size
;
3141 srel
->_raw_size
+= sizeof (Elf64_External_Rela
);
3144 *local_got
= (bfd_vma
) -1;
3148 /* Allocate global sym .plt and .got entries, and space for global
3149 sym dynamic relocs. */
3150 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, (PTR
) info
);
3152 /* We now have determined the sizes of the various dynamic sections.
3153 Allocate memory for them. */
3155 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3159 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3165 || s
== htab
->sglink
)
3167 /* Strip this section if we don't need it; see the
3170 else if (strncmp (bfd_get_section_name (dynobj
, s
), ".rela", 5) == 0)
3172 if (s
->_raw_size
== 0)
3174 /* If we don't need this section, strip it from the
3175 output file. This is mostly to handle .rela.bss and
3176 .rela.plt. We must create both sections in
3177 create_dynamic_sections, because they must be created
3178 before the linker maps input sections to output
3179 sections. The linker does that before
3180 adjust_dynamic_symbol is called, and it is that
3181 function which decides whether anything needs to go
3182 into these sections. */
3186 if (s
!= htab
->srelplt
)
3189 /* We use the reloc_count field as a counter if we need
3190 to copy relocs into the output file. */
3196 /* It's not one of our sections, so don't allocate space. */
3200 if (s
->_raw_size
== 0)
3202 _bfd_strip_section_from_output (info
, s
);
3206 /* Allocate memory for the section contents. We use bfd_zalloc
3207 here in case unused entries are not reclaimed before the
3208 section's contents are written out. This should not happen,
3209 but this way if it does, we get a R_PPC64_NONE reloc instead
3211 size
= s
->_raw_size
;
3212 if (s
== htab
->sstub
)
3214 /* .stub may grow. Allocate enough for the maximum growth. */
3215 size
+= (size
+ 65536 + 65535) / 65536 * 4;
3217 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, size
);
3218 if (s
->contents
== NULL
)
3222 if (htab
->elf
.dynamic_sections_created
)
3224 /* Add some entries to the .dynamic section. We fill in the
3225 values later, in ppc64_elf_finish_dynamic_sections, but we
3226 must add the entries now so that we get the correct size for
3227 the .dynamic section. The DT_DEBUG entry is filled in by the
3228 dynamic linker and used by the debugger. */
3229 #define add_dynamic_entry(TAG, VAL) \
3230 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
3234 if (!add_dynamic_entry (DT_DEBUG
, 0))
3238 if (htab
->splt
->_raw_size
!= 0)
3240 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3241 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3242 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3243 || !add_dynamic_entry (DT_JMPREL
, 0)
3244 || !add_dynamic_entry (DT_PPC64_GLINK
, 0))
3250 if (!add_dynamic_entry (DT_PPC64_OPD
, 0)
3251 || !add_dynamic_entry (DT_PPC64_OPDSZ
, 0))
3257 if (!add_dynamic_entry (DT_RELA
, 0)
3258 || !add_dynamic_entry (DT_RELASZ
, 0)
3259 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
3262 /* If any dynamic relocs apply to a read-only section,
3263 then we need a DT_TEXTREL entry. */
3264 if ((info
->flags
& DF_TEXTREL
) == 0)
3265 elf_link_hash_traverse (&htab
->elf
, readonly_dynrelocs
,
3268 if ((info
->flags
& DF_TEXTREL
) != 0)
3270 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3275 #undef add_dynamic_entry
3280 /* Called after we have seen all the input files/sections, but before
3281 final symbol resolution and section placement has been determined.
3283 We use this hook to provide a value for TOCstart, which we store in
3284 the output bfd elf_gp. */
3287 ppc64_elf_set_toc (obfd
, info
)
3289 struct bfd_link_info
*info
;
3291 if (!info
->relocateable
)
3296 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
3297 order. The TOC starts where the first of these sections starts. */
3298 s
= bfd_get_section_by_name (obfd
, ".got");
3300 s
= bfd_get_section_by_name (obfd
, ".toc");
3302 s
= bfd_get_section_by_name (obfd
, ".tocbss");
3304 s
= bfd_get_section_by_name (obfd
, ".plt");
3307 /* This may happen for
3308 o references to TOC base (SYM@toc / TOC[tc0]) without a
3311 o --gc-sections and empty TOC sections
3313 FIXME: Warn user? */
3315 /* Look for a likely section. We probably won't even be
3317 for (s
= obfd
->sections
; s
!= NULL
; s
= s
->next
)
3318 if ((s
->flags
& (SEC_ALLOC
| SEC_SMALL_DATA
| SEC_READONLY
))
3319 == (SEC_ALLOC
| SEC_SMALL_DATA
))
3322 for (s
= obfd
->sections
; s
!= NULL
; s
= s
->next
)
3323 if ((s
->flags
& (SEC_ALLOC
| SEC_SMALL_DATA
))
3324 == (SEC_ALLOC
| SEC_SMALL_DATA
))
3327 for (s
= obfd
->sections
; s
!= NULL
; s
= s
->next
)
3328 if ((s
->flags
& (SEC_ALLOC
| SEC_READONLY
)) == SEC_ALLOC
)
3331 for (s
= obfd
->sections
; s
!= NULL
; s
= s
->next
)
3332 if ((s
->flags
& SEC_ALLOC
) == SEC_ALLOC
)
3338 TOCstart
= s
->output_section
->vma
+ s
->output_offset
;
3340 elf_gp (obfd
) = TOCstart
;
3345 /* PowerPC64 .plt entries are 24 bytes long, which doesn't divide
3346 evenly into 64k. Sometimes with a large enough .plt, we'll need to
3347 use offsets differing in the high 16 bits when accessing a .plt
3348 entry from a .plt call stub. This function adjusts the size of
3349 .stub to accommodate the extra stub instruction needed in such
3353 ppc64_elf_size_stubs (obfd
, info
, changed
)
3355 struct bfd_link_info
*info
;
3358 struct ppc_link_hash_table
*htab
= ppc_hash_table (info
);
3359 bfd_vma plt_offset
, next_64k
;
3360 long base
, num
, extra
;
3362 /* .plt and .stub should be both present, or both absent. */
3363 if ((htab
->splt
== NULL
|| htab
->splt
->_raw_size
== 0)
3364 != (htab
->sstub
== NULL
|| htab
->sstub
->_raw_size
== 0))
3367 /* If no .plt, then nothing to do. */
3368 if (htab
->splt
== NULL
|| htab
->splt
->_raw_size
== 0)
3371 plt_offset
= (htab
->splt
->output_section
->vma
3372 + htab
->splt
->output_offset
3374 next_64k
= (plt_offset
+ 65535) & -65536;
3376 /* If the .plt doesn't have any entries crossing a 64k boundary,
3377 then there is no need for bigger stubs. */
3378 if (plt_offset
+ htab
->splt
->_raw_size
<= next_64k
)
3381 /* OK, so we have at least one transition. Since .plt entries are
3382 24 bytes long, we'll strike it lucky every 3*64k, with the 64k
3383 boundary between .plt entries. */
3384 base
= next_64k
/ 65536;
3385 num
= (plt_offset
+ htab
->splt
->_raw_size
- next_64k
) / 65536;
3386 extra
= (base
% 3 + num
+ 1) * 2 / 3;
3388 /* Allow one extra instruction for each EXTRA. The change in .stub
3389 may change the location of .toc and .plt. .toc and .plt ought to
3390 move as a group, but someone might be playing with eg. .plt
3391 alignment, so don't allow .stub size to decrease. */
3392 if (htab
->sstub
->_cooked_size
< htab
->sstub
->_raw_size
+ extra
* 4)
3394 htab
->sstub
->_cooked_size
= htab
->sstub
->_raw_size
+ extra
* 4;
3400 /* Build a .plt call stub. */
3403 build_plt_stub (obfd
, p
, offset
, glink
)
3409 #define PPC_LO(v) ((v) & 0xffff)
3410 #define PPC_HI(v) (((v) >> 16) & 0xffff)
3411 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
3414 bfd_put_32 (obfd
, LD_R2_40R1
, p
), p
+= 4;
3415 bfd_put_32 (obfd
, ADDIS_R12_R2
| PPC_HA (offset
), p
), p
+= 4;
3417 bfd_put_32 (obfd
, STD_R2_40R1
, p
), p
+= 4;
3418 bfd_put_32 (obfd
, LD_R11_0R12
| PPC_LO (offset
), p
), p
+= 4;
3419 if (PPC_HA (offset
+ 8) != PPC_HA (offset
))
3420 bfd_put_32 (obfd
, ADDIS_R12_R12_1
, p
), p
+= 4;
3422 bfd_put_32 (obfd
, LD_R2_0R12
| PPC_LO (offset
), p
), p
+= 4;
3423 if (PPC_HA (offset
+ 8) != PPC_HA (offset
))
3424 bfd_put_32 (obfd
, ADDIS_R12_R12_1
, p
), p
+= 4;
3426 bfd_put_32 (obfd
, MTCTR_R11
, p
), p
+= 4;
3427 bfd_put_32 (obfd
, LD_R11_0R12
| PPC_LO (offset
), p
), p
+= 4;
3428 bfd_put_32 (obfd
, BCTR
, p
), p
+= 4;
3432 /* Build the stubs for one function call. */
3435 build_one_stub (h
, inf
)
3436 struct elf_link_hash_entry
*h
;
3439 struct bfd_link_info
*info
;
3440 struct ppc_link_hash_table
*htab
;
3442 if (h
->root
.type
== bfd_link_hash_indirect
3443 || h
->root
.type
== bfd_link_hash_warning
)
3446 info
= (struct bfd_link_info
*) inf
;
3447 htab
= ppc_hash_table (info
);
3449 if (htab
->elf
.dynamic_sections_created
3450 && h
->plt
.offset
!= (bfd_vma
) -1
3451 && ((struct ppc_link_hash_entry
*) h
)->is_func_descriptor
)
3453 struct elf_link_hash_entry
*fh
;
3459 fh
= elf_link_hash_lookup (&htab
->elf
, h
->root
.root
.string
- 1,
3460 false, false, true);
3465 BFD_ASSERT (((struct ppc_link_hash_entry
*) fh
)->is_func
);
3467 /* Build the .plt call stub. */
3468 plt_r2
= (htab
->splt
->output_section
->vma
3469 + htab
->splt
->output_offset
3471 - elf_gp (htab
->splt
->output_section
->owner
)
3474 if (plt_r2
+ 0x80000000 > 0xffffffff
3475 || (plt_r2
& 3) != 0)
3477 (*_bfd_error_handler
)
3478 (_("linkage table error against `%s'"),
3479 h
->root
.root
.string
);
3480 bfd_set_error (bfd_error_bad_value
);
3481 htab
->plt_overflow
= true;
3486 /* Steal plt.offset to store the stub offset. */
3487 fh
->plt
.offset
= s
->_cooked_size
;
3488 p
= s
->contents
+ s
->_cooked_size
;
3489 p
= build_plt_stub (s
->owner
, p
, (int) plt_r2
, 0);
3490 s
->_cooked_size
= p
- s
->contents
;
3492 /* Build the .glink lazy link call stub. */
3494 p
= s
->contents
+ s
->_cooked_size
;
3495 indx
= s
->reloc_count
;
3498 bfd_put_32 (s
->owner
, LI_R0_0
| indx
, p
);
3503 bfd_put_32 (s
->owner
, LIS_R0_0
| PPC_HI (indx
), p
);
3505 bfd_put_32 (s
->owner
, ORI_R0_R0_0
| PPC_LO (indx
), p
);
3508 bfd_put_32 (s
->owner
, B_DOT
| ((s
->contents
- p
) & 0x3fffffc), p
);
3510 s
->_cooked_size
= p
- s
->contents
;
3511 s
->reloc_count
+= 1;
3517 ppc64_elf_build_stubs (obfd
, info
)
3519 struct bfd_link_info
*info
;
3521 struct ppc_link_hash_table
*htab
= ppc_hash_table (info
);
3522 bfd_vma old_stub_size
;
3526 /* If no .plt stubs, then nothing to do. */
3527 if (htab
->sstub
== NULL
|| htab
->sstub
->_raw_size
== 0)
3530 old_stub_size
= htab
->sstub
->_cooked_size
;
3531 htab
->sstub
->_cooked_size
= 0;
3533 /* Build the .glink plt call stub. */
3534 plt_r2
= (htab
->splt
->output_section
->vma
3535 + htab
->splt
->output_offset
3538 p
= htab
->sglink
->contents
;
3539 p
= build_plt_stub (htab
->sglink
->owner
, p
, (int) plt_r2
, 1);
3540 while (p
- htab
->sglink
->contents
< GLINK_CALL_STUB_SIZE
)
3542 bfd_put_32 (htab
->sglink
->owner
, NOP
, p
);
3545 htab
->sglink
->_cooked_size
= p
- htab
->sglink
->contents
;
3547 /* Use reloc_count to count entries. */
3548 htab
->sglink
->reloc_count
= 0;
3550 elf_link_hash_traverse (&htab
->elf
, build_one_stub
, (PTR
) info
);
3551 htab
->sglink
->reloc_count
= 0;
3553 if (htab
->plt_overflow
)
3556 if (old_stub_size
!= htab
->sstub
->_cooked_size
3557 || htab
->sglink
->_raw_size
!= htab
->sglink
->_cooked_size
)
3559 (*_bfd_error_handler
)
3560 (_("stub section size doesn't match calculated size"));
3561 bfd_set_error (bfd_error_bad_value
);
3567 /* Set up any other section flags and such that may be necessary. */
3570 ppc64_elf_fake_sections (abfd
, shdr
, asect
)
3571 bfd
*abfd ATTRIBUTE_UNUSED
;
3572 Elf64_Internal_Shdr
*shdr
;
3575 if ((asect
->flags
& SEC_EXCLUDE
) != 0)
3576 shdr
->sh_flags
|= SHF_EXCLUDE
;
3578 if ((asect
->flags
& SEC_SORT_ENTRIES
) != 0)
3579 shdr
->sh_type
= SHT_ORDERED
;
3584 /* The RELOCATE_SECTION function is called by the ELF backend linker
3585 to handle the relocations for a section.
3587 The relocs are always passed as Rela structures; if the section
3588 actually uses Rel structures, the r_addend field will always be
3591 This function is responsible for adjust the section contents as
3592 necessary, and (if using Rela relocs and generating a
3593 relocateable output file) adjusting the reloc addend as
3596 This function does not have to worry about setting the reloc
3597 address or the reloc symbol index.
3599 LOCAL_SYMS is a pointer to the swapped in local symbols.
3601 LOCAL_SECTIONS is an array giving the section in the input file
3602 corresponding to the st_shndx field of each local symbol.
3604 The global hash table entry for the global symbols can be found
3605 via elf_sym_hashes (input_bfd).
3607 When generating relocateable output, this function must handle
3608 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
3609 going to be the section symbol corresponding to the output
3610 section, which means that the addend must be adjusted
3614 ppc64_elf_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
3615 contents
, relocs
, local_syms
, local_sections
)
3617 struct bfd_link_info
*info
;
3619 asection
*input_section
;
3621 Elf_Internal_Rela
*relocs
;
3622 Elf_Internal_Sym
*local_syms
;
3623 asection
**local_sections
;
3625 struct ppc_link_hash_table
*htab
;
3626 Elf_Internal_Shdr
*symtab_hdr
;
3627 struct elf_link_hash_entry
**sym_hashes
;
3628 Elf_Internal_Rela
*rel
;
3629 Elf_Internal_Rela
*relend
;
3630 bfd_vma
*local_got_offsets
;
3635 /* Initialize howto table if needed. */
3636 if (!ppc64_elf_howto_table
[R_PPC64_ADDR32
])
3639 htab
= ppc_hash_table (info
);
3640 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3641 TOCstart
= elf_gp (output_bfd
);
3642 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3643 sym_hashes
= elf_sym_hashes (input_bfd
);
3644 is_opd
= strcmp (bfd_get_section_name (abfd
, input_section
), ".opd") == 0;
3647 relend
= relocs
+ input_section
->reloc_count
;
3648 for (; rel
< relend
; rel
++)
3650 enum elf_ppc_reloc_type r_type
;
3653 bfd_reloc_status_type r
;
3654 Elf_Internal_Sym
*sym
;
3656 struct elf_link_hash_entry
*h
;
3657 const char *sym_name
;
3658 unsigned long r_symndx
;
3660 boolean unresolved_reloc
;
3664 r_type
= (enum elf_ppc_reloc_type
) ELF64_R_TYPE (rel
->r_info
);
3665 r_symndx
= ELF64_R_SYM (rel
->r_info
);
3667 if (info
->relocateable
)
3669 /* This is a relocatable link. We don't have to change
3670 anything, unless the reloc is against a section symbol,
3671 in which case we have to adjust according to where the
3672 section symbol winds up in the output section. */
3673 if (r_symndx
< symtab_hdr
->sh_info
)
3675 sym
= local_syms
+ r_symndx
;
3676 if ((unsigned) ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
3678 sec
= local_sections
[r_symndx
];
3679 rel
->r_addend
+= sec
->output_offset
+ sym
->st_value
;
3685 /* This is a final link. */
3687 offset
= rel
->r_offset
;
3688 addend
= rel
->r_addend
;
3689 r
= bfd_reloc_other
;
3690 sym
= (Elf_Internal_Sym
*) 0;
3691 sec
= (asection
*) 0;
3692 h
= (struct elf_link_hash_entry
*) 0;
3693 sym_name
= (const char *) 0;
3694 unresolved_reloc
= false;
3696 if (r_type
== R_PPC64_TOC
)
3698 /* Relocation value is TOC base. Symbol is ignored. */
3699 relocation
= TOCstart
+ TOC_BASE_OFF
;
3701 else if (r_symndx
< symtab_hdr
->sh_info
)
3703 /* It's a local symbol. */
3704 sym
= local_syms
+ r_symndx
;
3705 sec
= local_sections
[r_symndx
];
3706 sym_name
= "<local symbol>";
3708 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, sec
, rel
);
3709 addend
= rel
->r_addend
;
3713 /* It's a global symbol. */
3714 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3715 while (h
->root
.type
== bfd_link_hash_indirect
3716 || h
->root
.type
== bfd_link_hash_warning
)
3717 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3718 sym_name
= h
->root
.root
.string
;
3720 if (h
->root
.type
== bfd_link_hash_defined
3721 || h
->root
.type
== bfd_link_hash_defweak
)
3723 sec
= h
->root
.u
.def
.section
;
3724 if (sec
->output_section
== NULL
)
3725 /* Set a flag that will be cleared later if we find a
3726 relocation value for this symbol. output_section
3727 is typically NULL for symbols satisfied by a shared
3729 unresolved_reloc
= true;
3731 relocation
= (h
->root
.u
.def
.value
3732 + sec
->output_section
->vma
3733 + sec
->output_offset
);
3735 else if (h
->root
.type
== bfd_link_hash_undefweak
)
3737 else if (info
->shared
3738 && (!info
->symbolic
|| info
->allow_shlib_undefined
)
3739 && !info
->no_undefined
3740 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
3744 if (! ((*info
->callbacks
->undefined_symbol
)
3745 (info
, h
->root
.root
.string
, input_bfd
, input_section
,
3746 offset
, (!info
->shared
3747 || info
->no_undefined
3748 || ELF_ST_VISIBILITY (h
->other
)))))
3753 /* First handle relocations that tweak non-addend part of insn. */
3760 /* Branch taken prediction relocations. */
3761 case R_PPC64_ADDR14_BRTAKEN
:
3762 case R_PPC64_REL14_BRTAKEN
:
3763 insn
= 0x01 << 21; /* Set 't' bit, lowest bit of BO field. */
3766 /* Branch not taken prediction relocations. */
3767 case R_PPC64_ADDR14_BRNTAKEN
:
3768 case R_PPC64_REL14_BRNTAKEN
:
3769 insn
|= bfd_get_32 (output_bfd
, contents
+ offset
) & ~(0x01 << 21);
3770 /* Set 'a' bit. This is 0b00010 in BO field for branch on CR(BI)
3771 insns (BO == 001at or 011at), and 0b01000 for branch on CTR
3772 insns (BO == 1a00t or 1a01t). */
3773 if ((insn
& (0x14 << 21)) == (0x04 << 21))
3775 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
3780 bfd_put_32 (output_bfd
, (bfd_vma
) insn
, contents
+ offset
);
3784 case R_PPC64_ADDR24
:
3785 /* An ADDR24 or REL24 branching to a linkage function may be
3786 followed by a nop that we have to replace with a ld in
3787 order to restore the TOC base pointer. Only calls to
3788 shared objects need to alter the TOC base. These are
3789 recognized by their need for a PLT entry. */
3792 && h
->plt
.offset
!= (bfd_vma
) -1
3793 && htab
->sstub
!= NULL
)
3795 /* plt.offset here is the offset into the stub section. */
3796 relocation
= (htab
->sstub
->output_section
->vma
3797 + htab
->sstub
->output_offset
3799 unresolved_reloc
= false;
3801 /* Make sure that there really is an instruction after
3802 the branch that we can decode. */
3803 if (offset
+ 8 <= input_section
->_cooked_size
)
3807 pnext
= contents
+ offset
+ 4;
3808 insn
= bfd_get_32 (input_bfd
, pnext
);
3810 if (insn
== 0x60000000 /* nop (ori r0,r0,0) */
3811 || insn
== 0x4def7b82 /* cror 15,15,15 */
3812 || insn
== 0x4ffffb82) /* cror 31,31,31 */
3814 bfd_put_32 (input_bfd
,
3815 (bfd_vma
) 0xe8410028, /* ld r2,40(r1) */
3823 && h
->root
.type
== bfd_link_hash_undefweak
3824 && r_type
== R_PPC64_REL24
3828 /* Tweak calls to undefined weak functions to behave as
3829 if the "called" function immediately returns. We can
3830 thus call to a weak function without first checking
3831 whether the function is defined. */
3843 (*_bfd_error_handler
)
3844 (_("%s: unknown relocation type %d for symbol %s"),
3845 bfd_archive_filename (input_bfd
), (int) r_type
, sym_name
);
3847 bfd_set_error (bfd_error_bad_value
);
3852 case R_PPC_GNU_VTINHERIT
:
3853 case R_PPC_GNU_VTENTRY
:
3856 /* GOT16 relocations. Like an ADDR16 using the symbol's
3857 address in the GOT as relocation value instead of the
3858 symbols value itself. Also, create a GOT entry for the
3859 symbol and put the symbol value there. */
3861 case R_PPC64_GOT16_LO
:
3862 case R_PPC64_GOT16_HI
:
3863 case R_PPC64_GOT16_HA
:
3864 case R_PPC64_GOT16_DS
:
3865 case R_PPC64_GOT16_LO_DS
:
3867 /* Relocation is to the entry for this symbol in the global
3871 if (htab
->sgot
== NULL
)
3878 off
= h
->got
.offset
;
3879 dyn
= htab
->elf
.dynamic_sections_created
;
3880 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
, h
)
3884 || (h
->elf_link_hash_flags
3885 & ELF_LINK_FORCED_LOCAL
))
3886 && (h
->elf_link_hash_flags
3887 & ELF_LINK_HASH_DEF_REGULAR
)))
3889 /* This is actually a static link, or it is a
3890 -Bsymbolic link and the symbol is defined
3891 locally, or the symbol was forced to be local
3892 because of a version file. We must initialize
3893 this entry in the global offset table. Since the
3894 offset must always be a multiple of 8, we use the
3895 least significant bit to record whether we have
3896 initialized it already.
3898 When doing a dynamic link, we create a .rel.got
3899 relocation entry to initialize the value. This
3900 is done in the finish_dynamic_symbol routine. */
3905 bfd_put_64 (output_bfd
, relocation
,
3906 htab
->sgot
->contents
+ off
);
3911 unresolved_reloc
= false;
3915 if (local_got_offsets
== NULL
)
3918 off
= local_got_offsets
[r_symndx
];
3920 /* The offset must always be a multiple of 8. We use
3921 the least significant bit to record whether we have
3922 already processed this entry. */
3927 bfd_put_64 (output_bfd
, relocation
,
3928 htab
->sgot
->contents
+ off
);
3932 Elf_Internal_Rela outrel
;
3933 Elf64_External_Rela
*loc
;
3935 /* We need to generate a R_PPC64_RELATIVE reloc
3936 for the dynamic linker. */
3937 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
3938 + htab
->sgot
->output_offset
3940 outrel
.r_info
= ELF64_R_INFO (0, R_PPC64_RELATIVE
);
3941 outrel
.r_addend
= relocation
;
3942 loc
= (Elf64_External_Rela
*) htab
->srelgot
->contents
;
3943 loc
+= htab
->srelgot
->reloc_count
++;
3944 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
3947 local_got_offsets
[r_symndx
] |= 1;
3951 if (off
>= (bfd_vma
) -2)
3954 relocation
= htab
->sgot
->output_offset
+ off
;
3956 /* TOC base (r2) is TOC start plus 0x8000. */
3957 addend
-= TOC_BASE_OFF
;
3961 case R_PPC64_PLT16_HA
:
3962 case R_PPC64_PLT16_HI
:
3963 case R_PPC64_PLT16_LO
:
3966 /* Relocation is to the entry for this symbol in the
3967 procedure linkage table. */
3969 /* Resolve a PLT reloc against a local symbol directly,
3970 without using the procedure linkage table. */
3974 if (h
->plt
.offset
== (bfd_vma
) -1
3975 || htab
->splt
== NULL
)
3977 /* We didn't make a PLT entry for this symbol. This
3978 happens when statically linking PIC code, or when
3979 using -Bsymbolic. */
3983 relocation
= (htab
->splt
->output_section
->vma
3984 + htab
->splt
->output_offset
3986 unresolved_reloc
= false;
3989 /* TOC16 relocs. We want the offset relative to the TOC base,
3990 which is the address of the start of the TOC plus 0x8000.
3991 The TOC consists of sections .got, .toc, .tocbss, and .plt,
3994 case R_PPC64_TOC16_LO
:
3995 case R_PPC64_TOC16_HI
:
3996 case R_PPC64_TOC16_DS
:
3997 case R_PPC64_TOC16_LO_DS
:
3998 case R_PPC64_TOC16_HA
:
3999 addend
-= TOCstart
+ TOC_BASE_OFF
;
4002 /* Relocate against the beginning of the section. */
4003 case R_PPC64_SECTOFF
:
4004 case R_PPC64_SECTOFF_LO
:
4005 case R_PPC64_SECTOFF_HI
:
4006 case R_PPC64_SECTOFF_DS
:
4007 case R_PPC64_SECTOFF_LO_DS
:
4008 case R_PPC64_SECTOFF_HA
:
4009 if (sec
!= (asection
*) 0)
4010 addend
-= sec
->output_section
->vma
;
4016 /* Relocations that may need to be propagated if this is a
4019 case R_PPC64_REL14_BRNTAKEN
:
4020 case R_PPC64_REL14_BRTAKEN
:
4023 case R_PPC64_ADDR14
:
4024 case R_PPC64_ADDR14_BRNTAKEN
:
4025 case R_PPC64_ADDR14_BRTAKEN
:
4026 case R_PPC64_ADDR16
:
4027 case R_PPC64_ADDR16_DS
:
4028 case R_PPC64_ADDR16_HA
:
4029 case R_PPC64_ADDR16_HI
:
4030 case R_PPC64_ADDR16_HIGHER
:
4031 case R_PPC64_ADDR16_HIGHERA
:
4032 case R_PPC64_ADDR16_HIGHEST
:
4033 case R_PPC64_ADDR16_HIGHESTA
:
4034 case R_PPC64_ADDR16_LO
:
4035 case R_PPC64_ADDR16_LO_DS
:
4036 case R_PPC64_ADDR24
:
4037 case R_PPC64_ADDR30
:
4038 case R_PPC64_ADDR32
:
4039 case R_PPC64_ADDR64
:
4040 case R_PPC64_UADDR16
:
4041 case R_PPC64_UADDR32
:
4042 case R_PPC64_UADDR64
:
4043 /* r_symndx will be zero only for relocs against symbols
4044 from removed linkonce sections, or sections discarded by
4051 if ((input_section
->flags
& SEC_ALLOC
) == 0)
4054 if (NO_OPD_RELOCS
&& is_opd
)
4058 && (IS_ABSOLUTE_RELOC (r_type
)
4061 && (! info
->symbolic
4062 || (h
->elf_link_hash_flags
4063 & ELF_LINK_HASH_DEF_REGULAR
) == 0))))
4067 && (h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0
4068 && (((h
->elf_link_hash_flags
4069 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0
4070 && (h
->elf_link_hash_flags
4071 & ELF_LINK_HASH_DEF_REGULAR
) == 0)
4072 || h
->root
.type
== bfd_link_hash_undefweak
4073 || h
->root
.type
== bfd_link_hash_undefined
)))
4075 Elf_Internal_Rela outrel
;
4076 boolean skip
, relocate
;
4078 Elf64_External_Rela
*loc
;
4080 /* When generating a dynamic object, these relocations
4081 are copied into the output file to be resolved at run
4087 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4089 if (outrel
.r_offset
== (bfd_vma
) -1)
4092 outrel
.r_offset
+= (input_section
->output_section
->vma
4093 + input_section
->output_offset
);
4094 outrel
.r_addend
= addend
;
4099 memset (&outrel
, 0, sizeof outrel
);
4104 && (!IS_ABSOLUTE_RELOC (r_type
)
4107 || (h
->elf_link_hash_flags
4108 & ELF_LINK_HASH_DEF_REGULAR
) == 0))
4111 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
4115 /* This symbol is local, or marked to become local,
4116 or this is an opd section reloc which must point
4117 at a local function. */
4118 outrel
.r_addend
+= relocation
;
4120 if (r_type
== R_PPC64_ADDR64
|| r_type
== R_PPC64_TOC
)
4122 outrel
.r_info
= ELF64_R_INFO (0, R_PPC64_RELATIVE
);
4128 if (bfd_is_abs_section (sec
))
4130 else if (sec
== NULL
|| sec
->owner
== NULL
)
4132 bfd_set_error (bfd_error_bad_value
);
4139 osec
= sec
->output_section
;
4140 indx
= elf_section_data (osec
)->dynindx
;
4142 /* We are turning this relocation into one
4143 against a section symbol, so subtract out
4144 the output section's address but not the
4145 offset of the input section in the output
4147 outrel
.r_addend
-= osec
->vma
;
4150 outrel
.r_info
= ELF64_R_INFO (indx
, r_type
);
4154 sreloc
= elf_section_data (input_section
)->sreloc
;
4158 loc
= (Elf64_External_Rela
*) sreloc
->contents
;
4159 loc
+= sreloc
->reloc_count
++;
4160 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
4162 /* If this reloc is against an external symbol, it will
4163 be computed at runtime, so there's no need to do
4171 case R_PPC64_GLOB_DAT
:
4172 case R_PPC64_JMP_SLOT
:
4173 case R_PPC64_RELATIVE
:
4174 /* We shouldn't ever see these dynamic relocs in relocatable
4178 case R_PPC64_PLTGOT16
:
4179 case R_PPC64_PLTGOT16_DS
:
4180 case R_PPC64_PLTGOT16_HA
:
4181 case R_PPC64_PLTGOT16_HI
:
4182 case R_PPC64_PLTGOT16_LO
:
4183 case R_PPC64_PLTGOT16_LO_DS
:
4184 case R_PPC64_PLTREL32
:
4185 case R_PPC64_PLTREL64
:
4186 /* These ones haven't been implemented yet. */
4188 (*_bfd_error_handler
)
4189 (_("%s: Relocation %s is not supported for symbol %s."),
4190 bfd_archive_filename (input_bfd
),
4191 ppc64_elf_howto_table
[(int) r_type
]->name
, sym_name
);
4193 bfd_set_error (bfd_error_invalid_operation
);
4198 /* Do any further special processing. */
4204 case R_PPC64_ADDR16_HA
:
4205 case R_PPC64_ADDR16_HIGHERA
:
4206 case R_PPC64_ADDR16_HIGHESTA
:
4207 case R_PPC64_PLT16_HA
:
4208 case R_PPC64_TOC16_HA
:
4209 case R_PPC64_SECTOFF_HA
:
4210 /* It's just possible that this symbol is a weak symbol
4211 that's not actually defined anywhere. In that case,
4212 'sec' would be NULL, and we should leave the symbol
4213 alone (it will be set to zero elsewhere in the link). */
4215 /* Add 0x10000 if sign bit in 0:15 is set. */
4216 addend
+= ((relocation
+ addend
) & 0x8000) << 1;
4219 case R_PPC64_ADDR16_DS
:
4220 case R_PPC64_ADDR16_LO_DS
:
4221 case R_PPC64_GOT16_DS
:
4222 case R_PPC64_GOT16_LO_DS
:
4223 case R_PPC64_PLT16_LO_DS
:
4224 case R_PPC64_SECTOFF_DS
:
4225 case R_PPC64_SECTOFF_LO_DS
:
4226 case R_PPC64_TOC16_DS
:
4227 case R_PPC64_TOC16_LO_DS
:
4228 case R_PPC64_PLTGOT16_DS
:
4229 case R_PPC64_PLTGOT16_LO_DS
:
4230 if (((relocation
+ addend
) & 3) != 0)
4232 (*_bfd_error_handler
)
4233 (_("%s: error: relocation %s not a multiple of 4"),
4234 bfd_archive_filename (input_bfd
),
4235 ppc64_elf_howto_table
[(int) r_type
]->name
);
4236 bfd_set_error (bfd_error_bad_value
);
4243 /* FIXME: Why do we allow debugging sections to escape this error?
4244 More importantly, why do we not emit dynamic relocs above in
4245 debugging sections (which are ! SEC_ALLOC)? If we had
4246 emitted the dynamic reloc, we could remove the fudge here. */
4247 if (unresolved_reloc
4249 && (input_section
->flags
& SEC_DEBUGGING
) != 0
4250 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0))
4251 (*_bfd_error_handler
)
4252 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
4253 bfd_archive_filename (input_bfd
),
4254 bfd_get_section_name (input_bfd
, input_section
),
4255 (long) rel
->r_offset
,
4256 h
->root
.root
.string
);
4258 r
= _bfd_final_link_relocate (ppc64_elf_howto_table
[(int) r_type
],
4266 if (r
== bfd_reloc_ok
)
4268 else if (r
== bfd_reloc_overflow
)
4274 if (h
->root
.type
== bfd_link_hash_undefweak
4275 && ppc64_elf_howto_table
[(int) r_type
]->pc_relative
)
4277 /* Assume this is a call protected by other code that
4278 detects the symbol is undefined. If this is the case,
4279 we can safely ignore the overflow. If not, the
4280 program is hosed anyway, and a little warning isn't
4286 name
= h
->root
.root
.string
;
4290 name
= bfd_elf_string_from_elf_section (input_bfd
,
4291 symtab_hdr
->sh_link
,
4296 name
= bfd_section_name (input_bfd
, sec
);
4299 if (! ((*info
->callbacks
->reloc_overflow
)
4300 (info
, name
, ppc64_elf_howto_table
[(int) r_type
]->name
,
4301 (bfd_vma
) 0, input_bfd
, input_section
, offset
)))
4311 /* Finish up dynamic symbol handling. We set the contents of various
4312 dynamic sections here. */
4315 ppc64_elf_finish_dynamic_symbol (output_bfd
, info
, h
, sym
)
4317 struct bfd_link_info
*info
;
4318 struct elf_link_hash_entry
*h
;
4319 Elf_Internal_Sym
*sym
;
4321 struct ppc_link_hash_table
*htab
;
4324 htab
= ppc_hash_table (info
);
4325 dynobj
= htab
->elf
.dynobj
;
4327 if (h
->plt
.offset
!= (bfd_vma
) -1
4328 && ((struct ppc_link_hash_entry
*) h
)->is_func_descriptor
)
4330 Elf_Internal_Rela rela
;
4331 Elf64_External_Rela
*loc
;
4333 /* This symbol has an entry in the procedure linkage table. Set
4336 if (htab
->splt
== NULL
4337 || htab
->srelplt
== NULL
4338 || htab
->sglink
== NULL
)
4341 /* Create a JMP_SLOT reloc to inform the dynamic linker to
4342 fill in the PLT entry. */
4344 rela
.r_offset
= (htab
->splt
->output_section
->vma
4345 + htab
->splt
->output_offset
4347 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_PPC64_JMP_SLOT
);
4350 loc
= (Elf64_External_Rela
*) htab
->srelplt
->contents
;
4351 loc
+= (h
->plt
.offset
- PLT_INITIAL_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
4352 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
4355 if (h
->got
.offset
!= (bfd_vma
) -1)
4357 Elf_Internal_Rela rela
;
4358 Elf64_External_Rela
*loc
;
4360 /* This symbol has an entry in the global offset table. Set it
4363 if (htab
->sgot
== NULL
|| htab
->srelgot
== NULL
)
4366 rela
.r_offset
= (htab
->sgot
->output_section
->vma
4367 + htab
->sgot
->output_offset
4368 + (h
->got
.offset
&~ (bfd_vma
) 1));
4370 /* If this is a static link, or it is a -Bsymbolic link and the
4371 symbol is defined locally or was forced to be local because
4372 of a version file, we just want to emit a RELATIVE reloc.
4373 The entry in the global offset table will already have been
4374 initialized in the relocate_section function. */
4378 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
))
4379 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
))
4381 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4382 rela
.r_info
= ELF64_R_INFO (0, R_PPC64_RELATIVE
);
4383 rela
.r_addend
= (h
->root
.u
.def
.value
4384 + h
->root
.u
.def
.section
->output_section
->vma
4385 + h
->root
.u
.def
.section
->output_offset
);
4389 BFD_ASSERT ((h
->got
.offset
& 1) == 0);
4390 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4391 htab
->sgot
->contents
+ h
->got
.offset
);
4392 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_PPC64_GLOB_DAT
);
4396 loc
= (Elf64_External_Rela
*) htab
->srelgot
->contents
;
4397 loc
+= htab
->srelgot
->reloc_count
++;
4398 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
4401 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_COPY
) != 0)
4403 Elf_Internal_Rela rela
;
4404 Elf64_External_Rela
*loc
;
4406 /* This symbol needs a copy reloc. Set it up. */
4408 if (h
->dynindx
== -1
4409 || (h
->root
.type
!= bfd_link_hash_defined
4410 && h
->root
.type
!= bfd_link_hash_defweak
)
4411 || htab
->srelbss
== NULL
)
4414 rela
.r_offset
= (h
->root
.u
.def
.value
4415 + h
->root
.u
.def
.section
->output_section
->vma
4416 + h
->root
.u
.def
.section
->output_offset
);
4417 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_PPC64_COPY
);
4419 loc
= (Elf64_External_Rela
*) htab
->srelbss
->contents
;
4420 loc
+= htab
->srelbss
->reloc_count
++;
4421 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
4424 /* Mark some specially defined symbols as absolute. */
4425 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0)
4426 sym
->st_shndx
= SHN_ABS
;
4431 /* Used to decide how to sort relocs in an optimal manner for the
4432 dynamic linker, before writing them out. */
4434 static enum elf_reloc_type_class
4435 ppc64_elf_reloc_type_class (rela
)
4436 const Elf_Internal_Rela
*rela
;
4438 enum elf_ppc_reloc_type r_type
;
4440 r_type
= (enum elf_ppc_reloc_type
) ELF64_R_TYPE (rela
->r_info
);
4443 case R_PPC64_RELATIVE
:
4444 return reloc_class_relative
;
4445 case R_PPC64_JMP_SLOT
:
4446 return reloc_class_plt
;
4448 return reloc_class_copy
;
4450 return reloc_class_normal
;
4454 /* Finish up the dynamic sections. */
4457 ppc64_elf_finish_dynamic_sections (output_bfd
, info
)
4459 struct bfd_link_info
*info
;
4461 struct ppc_link_hash_table
*htab
;
4465 htab
= ppc_hash_table (info
);
4466 dynobj
= htab
->elf
.dynobj
;
4467 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
4469 if (htab
->elf
.dynamic_sections_created
)
4471 Elf64_External_Dyn
*dyncon
, *dynconend
;
4473 if (sdyn
== NULL
|| htab
->sgot
== NULL
)
4476 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
4477 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->_raw_size
);
4478 for (; dyncon
< dynconend
; dyncon
++)
4480 Elf_Internal_Dyn dyn
;
4483 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4490 case DT_PPC64_GLINK
:
4491 dyn
.d_un
.d_ptr
= (htab
->sglink
->output_section
->vma
4492 + htab
->sglink
->output_offset
);
4496 s
= bfd_get_section_by_name (output_bfd
, ".opd");
4498 dyn
.d_un
.d_ptr
= s
->vma
;
4501 case DT_PPC64_OPDSZ
:
4502 s
= bfd_get_section_by_name (output_bfd
, ".opd");
4504 dyn
.d_un
.d_val
= s
->_raw_size
;
4508 dyn
.d_un
.d_ptr
= (htab
->splt
->output_section
->vma
4509 + htab
->splt
->output_offset
);
4513 dyn
.d_un
.d_ptr
= (htab
->srelplt
->output_section
->vma
4514 + htab
->srelplt
->output_offset
);
4518 dyn
.d_un
.d_val
= htab
->srelplt
->_raw_size
;
4522 /* Don't count procedure linkage table relocs in the
4523 overall reloc count. */
4524 if (htab
->srelplt
!= NULL
)
4525 dyn
.d_un
.d_val
-= htab
->srelplt
->_raw_size
;
4529 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4533 if (htab
->sgot
!= NULL
&& htab
->sgot
->_raw_size
!= 0)
4535 /* Fill in the first entry in the global offset table.
4536 We use it to hold the link-time TOCbase. */
4537 bfd_put_64 (output_bfd
,
4538 elf_gp (output_bfd
) + TOC_BASE_OFF
,
4539 htab
->sgot
->contents
);
4541 /* Set .got entry size. */
4542 elf_section_data (htab
->sgot
->output_section
)->this_hdr
.sh_entsize
= 8;
4545 if (htab
->splt
!= NULL
&& htab
->splt
->_raw_size
!= 0)
4547 /* Set .plt entry size. */
4548 elf_section_data (htab
->splt
->output_section
)->this_hdr
.sh_entsize
4555 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
4556 #define TARGET_LITTLE_NAME "elf64-powerpcle"
4557 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
4558 #define TARGET_BIG_NAME "elf64-powerpc"
4559 #define ELF_ARCH bfd_arch_powerpc
4560 #define ELF_MACHINE_CODE EM_PPC64
4561 #define ELF_MAXPAGESIZE 0x10000
4562 #define elf_info_to_howto ppc64_elf_info_to_howto
4564 #ifdef EM_CYGNUS_POWERPC
4565 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
4569 #define ELF_MACHINE_ALT2 EM_PPC_OLD
4572 #define elf_backend_want_got_sym 0
4573 #define elf_backend_want_plt_sym 0
4574 #define elf_backend_plt_alignment 3
4575 #define elf_backend_plt_not_loaded 1
4576 #define elf_backend_got_symbol_offset 0
4577 #define elf_backend_got_header_size 8
4578 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
4579 #define elf_backend_can_gc_sections 1
4580 #define elf_backend_can_refcount 1
4582 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
4583 #define bfd_elf64_bfd_set_private_flags ppc64_elf_set_private_flags
4584 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
4585 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
4587 #define elf_backend_section_from_shdr ppc64_elf_section_from_shdr
4588 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
4589 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
4590 #define elf_backend_check_relocs ppc64_elf_check_relocs
4591 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
4592 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
4593 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
4594 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
4595 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
4596 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
4597 #define elf_backend_fake_sections ppc64_elf_fake_sections
4598 #define elf_backend_relocate_section ppc64_elf_relocate_section
4599 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
4600 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
4601 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
4603 #include "elf64-target.h"