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_ha_reloc
43 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
44 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
45 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
46 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
47 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
48 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
49 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
50 static bfd_reloc_status_type ppc64_elf_toc_reloc
51 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
52 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
53 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
54 static bfd_reloc_status_type ppc64_elf_toc64_reloc
55 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
56 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
57 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
58 static void ppc64_elf_get_symbol_info
59 PARAMS ((bfd
*, asymbol
*, symbol_info
*));
60 static boolean ppc64_elf_set_private_flags
61 PARAMS ((bfd
*, flagword
));
62 static boolean ppc64_elf_merge_private_bfd_data
63 PARAMS ((bfd
*, bfd
*));
64 static boolean ppc64_elf_section_from_shdr
65 PARAMS ((bfd
*, Elf64_Internal_Shdr
*, const char *));
68 /* The name of the dynamic interpreter. This is put in the .interp
70 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
72 /* The size in bytes of an entry in the procedure linkage table. */
73 #define PLT_ENTRY_SIZE 24
75 /* The initial size of the plt reserved for the dynamic linker. */
76 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
78 /* TOC base pointers offset from start of TOC. */
79 #define TOC_BASE_OFF (0x8000)
81 /* .plt call stub instructions. */
82 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
83 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
84 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
85 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
86 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
87 /* ld %r11,xxx+16@l(%r12) */
88 #define BCTR 0x4e800420 /* bctr */
90 /* The normal stub is this size. */
91 #define PLT_CALL_STUB_SIZE (7*4)
93 /* But sometimes the .plt entry crosses a 64k boundary, and we need
94 to adjust the high word with this insn. */
95 #define ADDIS_R12_R12_1 0x3d8c0001 /* addis %r12,%r12,1 */
97 /* The .glink fixup call stub is the same as the .plt call stub, but
98 the first instruction restores r2, and the std is omitted. */
99 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
101 /* Always allow this much space. */
102 #define GLINK_CALL_STUB_SIZE (8*4)
105 #define NOP 0x60000000
107 /* Some other nops. */
108 #define CROR_151515 0x4def7b82
109 #define CROR_313131 0x4ffffb82
111 /* .glink entries for the first 32k functions are two instructions. */
112 #define LI_R0_0 0x38000000 /* li %r0,0 */
113 #define B_DOT 0x48000000 /* b . */
115 /* After that, we need two instructions to load the index, followed by
117 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
118 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
120 /* Instructions to save and restore floating point regs. */
121 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
122 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
123 #define BLR 0x4e800020 /* blr */
125 /* Since .opd is an array of descriptors and each entry will end up
126 with identical R_PPC64_RELATIVE relocs, there is really no need to
127 propagate .opd relocs; The dynamic linker should be taught to
128 relocate .opd without reloc entries. FIXME: .opd should be trimmed
130 #ifndef NO_OPD_RELOCS
131 #define NO_OPD_RELOCS 0
134 /* Relocation HOWTO's. */
135 static reloc_howto_type
*ppc64_elf_howto_table
[(int) R_PPC_max
];
137 static reloc_howto_type ppc64_elf_howto_raw
[] = {
138 /* This reloc does nothing. */
139 HOWTO (R_PPC64_NONE
, /* type */
141 2, /* size (0 = byte, 1 = short, 2 = long) */
143 false, /* pc_relative */
145 complain_overflow_bitfield
, /* complain_on_overflow */
146 bfd_elf_generic_reloc
, /* special_function */
147 "R_PPC64_NONE", /* name */
148 false, /* partial_inplace */
151 false), /* pcrel_offset */
153 /* A standard 32 bit relocation. */
154 HOWTO (R_PPC64_ADDR32
, /* type */
156 2, /* size (0 = byte, 1 = short, 2 = long) */
158 false, /* pc_relative */
160 complain_overflow_bitfield
, /* complain_on_overflow */
161 bfd_elf_generic_reloc
, /* special_function */
162 "R_PPC64_ADDR32", /* name */
163 false, /* partial_inplace */
165 0xffffffff, /* dst_mask */
166 false), /* pcrel_offset */
168 /* An absolute 26 bit branch; the lower two bits must be zero.
169 FIXME: we don't check that, we just clear them. */
170 HOWTO (R_PPC64_ADDR24
, /* type */
172 2, /* size (0 = byte, 1 = short, 2 = long) */
174 false, /* pc_relative */
176 complain_overflow_bitfield
, /* complain_on_overflow */
177 bfd_elf_generic_reloc
, /* special_function */
178 "R_PPC64_ADDR24", /* name */
179 false, /* partial_inplace */
181 0x3fffffc, /* dst_mask */
182 false), /* pcrel_offset */
184 /* A standard 16 bit relocation. */
185 HOWTO (R_PPC64_ADDR16
, /* type */
187 1, /* size (0 = byte, 1 = short, 2 = long) */
189 false, /* pc_relative */
191 complain_overflow_bitfield
, /* complain_on_overflow */
192 bfd_elf_generic_reloc
, /* special_function */
193 "R_PPC64_ADDR16", /* name */
194 false, /* partial_inplace */
196 0xffff, /* dst_mask */
197 false), /* pcrel_offset */
199 /* A 16 bit relocation without overflow. */
200 HOWTO (R_PPC64_ADDR16_LO
, /* type */
202 1, /* size (0 = byte, 1 = short, 2 = long) */
204 false, /* pc_relative */
206 complain_overflow_dont
,/* complain_on_overflow */
207 bfd_elf_generic_reloc
, /* special_function */
208 "R_PPC64_ADDR16_LO", /* name */
209 false, /* partial_inplace */
211 0xffff, /* dst_mask */
212 false), /* pcrel_offset */
214 /* Bits 16-31 of an address. */
215 HOWTO (R_PPC64_ADDR16_HI
, /* type */
217 1, /* size (0 = byte, 1 = short, 2 = long) */
219 false, /* pc_relative */
221 complain_overflow_dont
, /* complain_on_overflow */
222 bfd_elf_generic_reloc
, /* special_function */
223 "R_PPC64_ADDR16_HI", /* name */
224 false, /* partial_inplace */
226 0xffff, /* dst_mask */
227 false), /* pcrel_offset */
229 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
230 bits, treated as a signed number, is negative. */
231 HOWTO (R_PPC64_ADDR16_HA
, /* type */
233 1, /* size (0 = byte, 1 = short, 2 = long) */
235 false, /* pc_relative */
237 complain_overflow_dont
, /* complain_on_overflow */
238 ppc64_elf_ha_reloc
, /* special_function */
239 "R_PPC64_ADDR16_HA", /* name */
240 false, /* partial_inplace */
242 0xffff, /* dst_mask */
243 false), /* pcrel_offset */
245 /* An absolute 16 bit branch; the lower two bits must be zero.
246 FIXME: we don't check that, we just clear them. */
247 HOWTO (R_PPC64_ADDR14
, /* type */
249 2, /* size (0 = byte, 1 = short, 2 = long) */
251 false, /* pc_relative */
253 complain_overflow_bitfield
, /* complain_on_overflow */
254 bfd_elf_generic_reloc
, /* special_function */
255 "R_PPC64_ADDR14", /* name */
256 false, /* partial_inplace */
258 0xfffc, /* dst_mask */
259 false), /* pcrel_offset */
261 /* An absolute 16 bit branch, for which bit 10 should be set to
262 indicate that the branch is expected to be taken. The lower two
263 bits must be zero. */
264 HOWTO (R_PPC64_ADDR14_BRTAKEN
, /* type */
266 2, /* size (0 = byte, 1 = short, 2 = long) */
268 false, /* pc_relative */
270 complain_overflow_bitfield
, /* complain_on_overflow */
271 ppc64_elf_brtaken_reloc
, /* special_function */
272 "R_PPC64_ADDR14_BRTAKEN",/* name */
273 false, /* partial_inplace */
275 0xfffc, /* dst_mask */
276 false), /* pcrel_offset */
278 /* An absolute 16 bit branch, for which bit 10 should be set to
279 indicate that the branch is not expected to be taken. The lower
280 two bits must be zero. */
281 HOWTO (R_PPC64_ADDR14_BRNTAKEN
, /* type */
283 2, /* size (0 = byte, 1 = short, 2 = long) */
285 false, /* pc_relative */
287 complain_overflow_bitfield
, /* complain_on_overflow */
288 ppc64_elf_brtaken_reloc
, /* special_function */
289 "R_PPC64_ADDR14_BRNTAKEN",/* name */
290 false, /* partial_inplace */
292 0xfffc, /* dst_mask */
293 false), /* pcrel_offset */
295 /* A relative 26 bit branch; the lower two bits must be zero. */
296 HOWTO (R_PPC64_REL24
, /* type */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
300 true, /* pc_relative */
302 complain_overflow_signed
, /* complain_on_overflow */
303 bfd_elf_generic_reloc
, /* special_function */
304 "R_PPC64_REL24", /* name */
305 false, /* partial_inplace */
307 0x3fffffc, /* dst_mask */
308 true), /* pcrel_offset */
310 /* A relative 16 bit branch; the lower two bits must be zero. */
311 HOWTO (R_PPC64_REL14
, /* type */
313 2, /* size (0 = byte, 1 = short, 2 = long) */
315 true, /* pc_relative */
317 complain_overflow_signed
, /* complain_on_overflow */
318 bfd_elf_generic_reloc
, /* special_function */
319 "R_PPC64_REL14", /* name */
320 false, /* partial_inplace */
322 0xfffc, /* dst_mask */
323 true), /* pcrel_offset */
325 /* A relative 16 bit branch. Bit 10 should be set to indicate that
326 the branch is expected to be taken. The lower two bits must be
328 HOWTO (R_PPC64_REL14_BRTAKEN
, /* type */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
332 true, /* pc_relative */
334 complain_overflow_signed
, /* complain_on_overflow */
335 ppc64_elf_brtaken_reloc
, /* special_function */
336 "R_PPC64_REL14_BRTAKEN", /* name */
337 false, /* partial_inplace */
339 0xfffc, /* dst_mask */
340 true), /* pcrel_offset */
342 /* A relative 16 bit branch. Bit 10 should be set to indicate that
343 the branch is not expected to be taken. The lower two bits must
345 HOWTO (R_PPC64_REL14_BRNTAKEN
, /* type */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
349 true, /* pc_relative */
351 complain_overflow_signed
, /* complain_on_overflow */
352 ppc64_elf_brtaken_reloc
, /* special_function */
353 "R_PPC64_REL14_BRNTAKEN",/* name */
354 false, /* partial_inplace */
356 0xfffc, /* dst_mask */
357 true), /* pcrel_offset */
359 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
361 HOWTO (R_PPC64_GOT16
, /* type */
363 1, /* size (0 = byte, 1 = short, 2 = long) */
365 false, /* pc_relative */
367 complain_overflow_signed
, /* complain_on_overflow */
368 ppc64_elf_unhandled_reloc
, /* special_function */
369 "R_PPC64_GOT16", /* name */
370 false, /* partial_inplace */
372 0xffff, /* dst_mask */
373 false), /* pcrel_offset */
375 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
377 HOWTO (R_PPC64_GOT16_LO
, /* type */
379 1, /* size (0 = byte, 1 = short, 2 = long) */
381 false, /* pc_relative */
383 complain_overflow_dont
, /* complain_on_overflow */
384 ppc64_elf_unhandled_reloc
, /* special_function */
385 "R_PPC64_GOT16_LO", /* name */
386 false, /* partial_inplace */
388 0xffff, /* dst_mask */
389 false), /* pcrel_offset */
391 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
393 HOWTO (R_PPC64_GOT16_HI
, /* type */
395 1, /* size (0 = byte, 1 = short, 2 = long) */
397 false, /* pc_relative */
399 complain_overflow_dont
,/* complain_on_overflow */
400 ppc64_elf_unhandled_reloc
, /* special_function */
401 "R_PPC64_GOT16_HI", /* name */
402 false, /* partial_inplace */
404 0xffff, /* dst_mask */
405 false), /* pcrel_offset */
407 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
409 HOWTO (R_PPC64_GOT16_HA
, /* type */
411 1, /* size (0 = byte, 1 = short, 2 = long) */
413 false, /* pc_relative */
415 complain_overflow_dont
,/* complain_on_overflow */
416 ppc64_elf_unhandled_reloc
, /* special_function */
417 "R_PPC64_GOT16_HA", /* name */
418 false, /* partial_inplace */
420 0xffff, /* dst_mask */
421 false), /* pcrel_offset */
423 /* This is used only by the dynamic linker. The symbol should exist
424 both in the object being run and in some shared library. The
425 dynamic linker copies the data addressed by the symbol from the
426 shared library into the object, because the object being
427 run has to have the data at some particular address. */
428 HOWTO (R_PPC64_COPY
, /* type */
430 2, /* size (0 = byte, 1 = short, 2 = long) */
432 false, /* pc_relative */
434 complain_overflow_bitfield
, /* complain_on_overflow */
435 ppc64_elf_unhandled_reloc
, /* special_function */
436 "R_PPC64_COPY", /* name */
437 false, /* partial_inplace */
440 false), /* pcrel_offset */
442 /* Like R_PPC64_ADDR64, but used when setting global offset table
444 HOWTO (R_PPC64_GLOB_DAT
, /* type */
446 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
448 false, /* pc_relative */
450 complain_overflow_dont
, /* complain_on_overflow */
451 ppc64_elf_unhandled_reloc
, /* special_function */
452 "R_PPC64_GLOB_DAT", /* name */
453 false, /* partial_inplace */
455 0xffffffffffffffff, /* dst_mask */
456 false), /* pcrel_offset */
458 /* Created by the link editor. Marks a procedure linkage table
459 entry for a symbol. */
460 HOWTO (R_PPC64_JMP_SLOT
, /* type */
462 0, /* size (0 = byte, 1 = short, 2 = long) */
464 false, /* pc_relative */
466 complain_overflow_dont
, /* complain_on_overflow */
467 ppc64_elf_unhandled_reloc
, /* special_function */
468 "R_PPC64_JMP_SLOT", /* name */
469 false, /* partial_inplace */
472 false), /* pcrel_offset */
474 /* Used only by the dynamic linker. When the object is run, this
475 doubleword64 is set to the load address of the object, plus the
477 HOWTO (R_PPC64_RELATIVE
, /* type */
479 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
481 false, /* pc_relative */
483 complain_overflow_dont
, /* complain_on_overflow */
484 bfd_elf_generic_reloc
, /* special_function */
485 "R_PPC64_RELATIVE", /* name */
486 false, /* partial_inplace */
488 0xffffffffffffffff, /* dst_mask */
489 false), /* pcrel_offset */
491 /* Like R_PPC64_ADDR32, but may be unaligned. */
492 HOWTO (R_PPC64_UADDR32
, /* type */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
496 false, /* pc_relative */
498 complain_overflow_bitfield
, /* complain_on_overflow */
499 bfd_elf_generic_reloc
, /* special_function */
500 "R_PPC64_UADDR32", /* name */
501 false, /* partial_inplace */
503 0xffffffff, /* dst_mask */
504 false), /* pcrel_offset */
506 /* Like R_PPC64_ADDR16, but may be unaligned. */
507 HOWTO (R_PPC64_UADDR16
, /* type */
509 1, /* size (0 = byte, 1 = short, 2 = long) */
511 false, /* pc_relative */
513 complain_overflow_bitfield
, /* complain_on_overflow */
514 bfd_elf_generic_reloc
, /* special_function */
515 "R_PPC64_UADDR16", /* name */
516 false, /* partial_inplace */
518 0xffff, /* dst_mask */
519 false), /* pcrel_offset */
521 /* 32-bit PC relative. */
522 HOWTO (R_PPC64_REL32
, /* type */
524 2, /* size (0 = byte, 1 = short, 2 = long) */
526 true, /* pc_relative */
528 /* FIXME: Verify. Was complain_overflow_bitfield. */
529 complain_overflow_signed
, /* complain_on_overflow */
530 bfd_elf_generic_reloc
, /* special_function */
531 "R_PPC64_REL32", /* name */
532 false, /* partial_inplace */
534 0xffffffff, /* dst_mask */
535 true), /* pcrel_offset */
537 /* 32-bit relocation to the symbol's procedure linkage table. */
538 HOWTO (R_PPC64_PLT32
, /* type */
540 2, /* size (0 = byte, 1 = short, 2 = long) */
542 false, /* pc_relative */
544 complain_overflow_bitfield
, /* complain_on_overflow */
545 ppc64_elf_unhandled_reloc
, /* special_function */
546 "R_PPC64_PLT32", /* name */
547 false, /* partial_inplace */
550 false), /* pcrel_offset */
552 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
553 FIXME: R_PPC64_PLTREL32 not supported. */
554 HOWTO (R_PPC64_PLTREL32
, /* type */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
558 true, /* pc_relative */
560 complain_overflow_signed
, /* complain_on_overflow */
561 bfd_elf_generic_reloc
, /* special_function */
562 "R_PPC64_PLTREL32", /* name */
563 false, /* partial_inplace */
566 true), /* pcrel_offset */
568 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
570 HOWTO (R_PPC64_PLT16_LO
, /* type */
572 1, /* size (0 = byte, 1 = short, 2 = long) */
574 false, /* pc_relative */
576 complain_overflow_dont
, /* complain_on_overflow */
577 ppc64_elf_unhandled_reloc
, /* special_function */
578 "R_PPC64_PLT16_LO", /* name */
579 false, /* partial_inplace */
581 0xffff, /* dst_mask */
582 false), /* pcrel_offset */
584 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
586 HOWTO (R_PPC64_PLT16_HI
, /* type */
588 1, /* size (0 = byte, 1 = short, 2 = long) */
590 false, /* pc_relative */
592 complain_overflow_dont
, /* complain_on_overflow */
593 ppc64_elf_unhandled_reloc
, /* special_function */
594 "R_PPC64_PLT16_HI", /* name */
595 false, /* partial_inplace */
597 0xffff, /* dst_mask */
598 false), /* pcrel_offset */
600 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
602 HOWTO (R_PPC64_PLT16_HA
, /* type */
604 1, /* size (0 = byte, 1 = short, 2 = long) */
606 false, /* pc_relative */
608 complain_overflow_dont
, /* complain_on_overflow */
609 ppc64_elf_unhandled_reloc
, /* special_function */
610 "R_PPC64_PLT16_HA", /* name */
611 false, /* partial_inplace */
613 0xffff, /* dst_mask */
614 false), /* pcrel_offset */
616 /* 16-bit section relative relocation. */
617 HOWTO (R_PPC64_SECTOFF
, /* type */
619 1, /* size (0 = byte, 1 = short, 2 = long) */
621 false, /* pc_relative */
623 complain_overflow_bitfield
, /* complain_on_overflow */
624 ppc64_elf_sectoff_reloc
, /* special_function */
625 "R_PPC64_SECTOFF", /* name */
626 false, /* partial_inplace */
628 0xffff, /* dst_mask */
629 false), /* pcrel_offset */
631 /* Like R_PPC64_SECTOFF, but no overflow warning. */
632 HOWTO (R_PPC64_SECTOFF_LO
, /* type */
634 1, /* size (0 = byte, 1 = short, 2 = long) */
636 false, /* pc_relative */
638 complain_overflow_dont
, /* complain_on_overflow */
639 ppc64_elf_sectoff_reloc
, /* special_function */
640 "R_PPC64_SECTOFF_LO", /* name */
641 false, /* partial_inplace */
643 0xffff, /* dst_mask */
644 false), /* pcrel_offset */
646 /* 16-bit upper half section relative relocation. */
647 HOWTO (R_PPC64_SECTOFF_HI
, /* type */
649 1, /* size (0 = byte, 1 = short, 2 = long) */
651 false, /* pc_relative */
653 complain_overflow_dont
, /* complain_on_overflow */
654 ppc64_elf_sectoff_reloc
, /* special_function */
655 "R_PPC64_SECTOFF_HI", /* name */
656 false, /* partial_inplace */
658 0xffff, /* dst_mask */
659 false), /* pcrel_offset */
661 /* 16-bit upper half adjusted section relative relocation. */
662 HOWTO (R_PPC64_SECTOFF_HA
, /* type */
664 1, /* size (0 = byte, 1 = short, 2 = long) */
666 false, /* pc_relative */
668 complain_overflow_dont
, /* complain_on_overflow */
669 ppc64_elf_sectoff_ha_reloc
, /* special_function */
670 "R_PPC64_SECTOFF_HA", /* name */
671 false, /* partial_inplace */
673 0xffff, /* dst_mask */
674 false), /* pcrel_offset */
676 /* Like R_PPC64_REL24 without touching the two least significant
677 bits. Should have been named R_PPC64_REL30! */
678 HOWTO (R_PPC64_ADDR30
, /* type */
680 2, /* size (0 = byte, 1 = short, 2 = long) */
682 true, /* pc_relative */
684 complain_overflow_dont
, /* complain_on_overflow */
685 bfd_elf_generic_reloc
, /* special_function */
686 "R_PPC64_ADDR30", /* name */
687 false, /* partial_inplace */
689 0xfffffffc, /* dst_mask */
690 true), /* pcrel_offset */
692 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
694 /* A standard 64-bit relocation. */
695 HOWTO (R_PPC64_ADDR64
, /* type */
697 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
699 false, /* pc_relative */
701 complain_overflow_dont
, /* complain_on_overflow */
702 bfd_elf_generic_reloc
, /* special_function */
703 "R_PPC64_ADDR64", /* name */
704 false, /* partial_inplace */
706 0xffffffffffffffff, /* dst_mask */
707 false), /* pcrel_offset */
709 /* The bits 32-47 of an address. */
710 HOWTO (R_PPC64_ADDR16_HIGHER
, /* type */
712 1, /* size (0 = byte, 1 = short, 2 = long) */
714 false, /* pc_relative */
716 complain_overflow_dont
, /* complain_on_overflow */
717 bfd_elf_generic_reloc
, /* special_function */
718 "R_PPC64_ADDR16_HIGHER", /* name */
719 false, /* partial_inplace */
721 0xffff, /* dst_mask */
722 false), /* pcrel_offset */
724 /* The bits 32-47 of an address, plus 1 if the contents of the low
725 16 bits, treated as a signed number, is negative. */
726 HOWTO (R_PPC64_ADDR16_HIGHERA
, /* type */
728 1, /* size (0 = byte, 1 = short, 2 = long) */
730 false, /* pc_relative */
732 complain_overflow_dont
, /* complain_on_overflow */
733 ppc64_elf_ha_reloc
, /* special_function */
734 "R_PPC64_ADDR16_HIGHERA", /* name */
735 false, /* partial_inplace */
737 0xffff, /* dst_mask */
738 false), /* pcrel_offset */
740 /* The bits 48-63 of an address. */
741 HOWTO (R_PPC64_ADDR16_HIGHEST
,/* type */
743 1, /* size (0 = byte, 1 = short, 2 = long) */
745 false, /* pc_relative */
747 complain_overflow_dont
, /* complain_on_overflow */
748 bfd_elf_generic_reloc
, /* special_function */
749 "R_PPC64_ADDR16_HIGHEST", /* name */
750 false, /* partial_inplace */
752 0xffff, /* dst_mask */
753 false), /* pcrel_offset */
755 /* The bits 48-63 of an address, plus 1 if the contents of the low
756 16 bits, treated as a signed number, is negative. */
757 HOWTO (R_PPC64_ADDR16_HIGHESTA
,/* type */
759 1, /* size (0 = byte, 1 = short, 2 = long) */
761 false, /* pc_relative */
763 complain_overflow_dont
, /* complain_on_overflow */
764 ppc64_elf_ha_reloc
, /* special_function */
765 "R_PPC64_ADDR16_HIGHESTA", /* name */
766 false, /* partial_inplace */
768 0xffff, /* dst_mask */
769 false), /* pcrel_offset */
771 /* Like ADDR64, but may be unaligned. */
772 HOWTO (R_PPC64_UADDR64
, /* type */
774 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
776 false, /* pc_relative */
778 complain_overflow_dont
, /* complain_on_overflow */
779 bfd_elf_generic_reloc
, /* special_function */
780 "R_PPC64_UADDR64", /* name */
781 false, /* partial_inplace */
783 0xffffffffffffffff, /* dst_mask */
784 false), /* pcrel_offset */
786 /* 64-bit relative relocation. */
787 HOWTO (R_PPC64_REL64
, /* type */
789 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
791 true, /* pc_relative */
793 complain_overflow_dont
, /* complain_on_overflow */
794 bfd_elf_generic_reloc
, /* special_function */
795 "R_PPC64_REL64", /* name */
796 false, /* partial_inplace */
798 0xffffffffffffffff, /* dst_mask */
799 true), /* pcrel_offset */
801 /* 64-bit relocation to the symbol's procedure linkage table. */
802 HOWTO (R_PPC64_PLT64
, /* type */
804 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
806 false, /* pc_relative */
808 complain_overflow_dont
, /* complain_on_overflow */
809 ppc64_elf_unhandled_reloc
, /* special_function */
810 "R_PPC64_PLT64", /* name */
811 false, /* partial_inplace */
814 false), /* pcrel_offset */
816 /* 64-bit PC relative relocation to the symbol's procedure linkage
818 /* FIXME: R_PPC64_PLTREL64 not supported. */
819 HOWTO (R_PPC64_PLTREL64
, /* type */
821 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
823 true, /* pc_relative */
825 complain_overflow_dont
, /* complain_on_overflow */
826 ppc64_elf_unhandled_reloc
, /* special_function */
827 "R_PPC64_PLTREL64", /* name */
828 false, /* partial_inplace */
831 true), /* pcrel_offset */
833 /* 16 bit TOC-relative relocation. */
835 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
836 HOWTO (R_PPC64_TOC16
, /* type */
838 1, /* size (0 = byte, 1 = short, 2 = long) */
840 false, /* pc_relative */
842 complain_overflow_signed
, /* complain_on_overflow */
843 ppc64_elf_toc_reloc
, /* special_function */
844 "R_PPC64_TOC16", /* name */
845 false, /* partial_inplace */
847 0xffff, /* dst_mask */
848 false), /* pcrel_offset */
850 /* 16 bit TOC-relative relocation without overflow. */
852 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
853 HOWTO (R_PPC64_TOC16_LO
, /* type */
855 1, /* size (0 = byte, 1 = short, 2 = long) */
857 false, /* pc_relative */
859 complain_overflow_dont
, /* complain_on_overflow */
860 ppc64_elf_toc_reloc
, /* special_function */
861 "R_PPC64_TOC16_LO", /* name */
862 false, /* partial_inplace */
864 0xffff, /* dst_mask */
865 false), /* pcrel_offset */
867 /* 16 bit TOC-relative relocation, high 16 bits. */
869 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
870 HOWTO (R_PPC64_TOC16_HI
, /* type */
872 1, /* size (0 = byte, 1 = short, 2 = long) */
874 false, /* pc_relative */
876 complain_overflow_dont
, /* complain_on_overflow */
877 ppc64_elf_toc_reloc
, /* special_function */
878 "R_PPC64_TOC16_HI", /* name */
879 false, /* partial_inplace */
881 0xffff, /* dst_mask */
882 false), /* pcrel_offset */
884 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
885 contents of the low 16 bits, treated as a signed number, is
888 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
889 HOWTO (R_PPC64_TOC16_HA
, /* type */
891 1, /* size (0 = byte, 1 = short, 2 = long) */
893 false, /* pc_relative */
895 complain_overflow_dont
, /* complain_on_overflow */
896 ppc64_elf_toc_ha_reloc
, /* special_function */
897 "R_PPC64_TOC16_HA", /* name */
898 false, /* partial_inplace */
900 0xffff, /* dst_mask */
901 false), /* pcrel_offset */
903 /* 64-bit relocation; insert value of TOC base (.TOC.). */
905 /* R_PPC64_TOC 51 doubleword64 .TOC. */
906 HOWTO (R_PPC64_TOC
, /* type */
908 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
910 false, /* pc_relative */
912 complain_overflow_bitfield
, /* complain_on_overflow */
913 ppc64_elf_toc64_reloc
, /* special_function */
914 "R_PPC64_TOC", /* name */
915 false, /* partial_inplace */
917 0xffffffffffffffff, /* dst_mask */
918 false), /* pcrel_offset */
920 /* Like R_PPC64_GOT16, but also informs the link editor that the
921 value to relocate may (!) refer to a PLT entry which the link
922 editor (a) may replace with the symbol value. If the link editor
923 is unable to fully resolve the symbol, it may (b) create a PLT
924 entry and store the address to the new PLT entry in the GOT.
925 This permits lazy resolution of function symbols at run time.
926 The link editor may also skip all of this and just (c) emit a
927 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
928 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
929 HOWTO (R_PPC64_PLTGOT16
, /* type */
931 1, /* size (0 = byte, 1 = short, 2 = long) */
933 false, /* pc_relative */
935 complain_overflow_signed
, /* complain_on_overflow */
936 ppc64_elf_unhandled_reloc
, /* special_function */
937 "R_PPC64_PLTGOT16", /* name */
938 false, /* partial_inplace */
940 0xffff, /* dst_mask */
941 false), /* pcrel_offset */
943 /* Like R_PPC64_PLTGOT16, but without overflow. */
944 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
945 HOWTO (R_PPC64_PLTGOT16_LO
, /* type */
947 1, /* size (0 = byte, 1 = short, 2 = long) */
949 false, /* pc_relative */
951 complain_overflow_dont
, /* complain_on_overflow */
952 ppc64_elf_unhandled_reloc
, /* special_function */
953 "R_PPC64_PLTGOT16_LO", /* name */
954 false, /* partial_inplace */
956 0xffff, /* dst_mask */
957 false), /* pcrel_offset */
959 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
960 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
961 HOWTO (R_PPC64_PLTGOT16_HI
, /* type */
963 1, /* size (0 = byte, 1 = short, 2 = long) */
965 false, /* pc_relative */
967 complain_overflow_dont
, /* complain_on_overflow */
968 ppc64_elf_unhandled_reloc
, /* special_function */
969 "R_PPC64_PLTGOT16_HI", /* name */
970 false, /* partial_inplace */
972 0xffff, /* dst_mask */
973 false), /* pcrel_offset */
975 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
976 1 if the contents of the low 16 bits, treated as a signed number,
978 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
979 HOWTO (R_PPC64_PLTGOT16_HA
, /* type */
981 1, /* size (0 = byte, 1 = short, 2 = long) */
983 false, /* pc_relative */
985 complain_overflow_dont
,/* complain_on_overflow */
986 ppc64_elf_unhandled_reloc
, /* special_function */
987 "R_PPC64_PLTGOT16_HA", /* name */
988 false, /* partial_inplace */
990 0xffff, /* dst_mask */
991 false), /* pcrel_offset */
993 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
994 HOWTO (R_PPC64_ADDR16_DS
, /* type */
996 1, /* size (0 = byte, 1 = short, 2 = long) */
998 false, /* pc_relative */
1000 complain_overflow_bitfield
, /* complain_on_overflow */
1001 bfd_elf_generic_reloc
, /* special_function */
1002 "R_PPC64_ADDR16_DS", /* name */
1003 false, /* partial_inplace */
1005 0xfffc, /* dst_mask */
1006 false), /* pcrel_offset */
1008 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1009 HOWTO (R_PPC64_ADDR16_LO_DS
, /* type */
1011 1, /* size (0 = byte, 1 = short, 2 = long) */
1013 false, /* pc_relative */
1015 complain_overflow_dont
,/* complain_on_overflow */
1016 bfd_elf_generic_reloc
, /* special_function */
1017 "R_PPC64_ADDR16_LO_DS",/* name */
1018 false, /* partial_inplace */
1020 0xfffc, /* dst_mask */
1021 false), /* pcrel_offset */
1023 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1024 HOWTO (R_PPC64_GOT16_DS
, /* type */
1026 1, /* size (0 = byte, 1 = short, 2 = long) */
1028 false, /* pc_relative */
1030 complain_overflow_signed
, /* complain_on_overflow */
1031 ppc64_elf_unhandled_reloc
, /* special_function */
1032 "R_PPC64_GOT16_DS", /* name */
1033 false, /* partial_inplace */
1035 0xfffc, /* dst_mask */
1036 false), /* pcrel_offset */
1038 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1039 HOWTO (R_PPC64_GOT16_LO_DS
, /* type */
1041 1, /* size (0 = byte, 1 = short, 2 = long) */
1043 false, /* pc_relative */
1045 complain_overflow_dont
, /* complain_on_overflow */
1046 ppc64_elf_unhandled_reloc
, /* special_function */
1047 "R_PPC64_GOT16_LO_DS", /* name */
1048 false, /* partial_inplace */
1050 0xfffc, /* dst_mask */
1051 false), /* pcrel_offset */
1053 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1054 HOWTO (R_PPC64_PLT16_LO_DS
, /* type */
1056 1, /* size (0 = byte, 1 = short, 2 = long) */
1058 false, /* pc_relative */
1060 complain_overflow_dont
, /* complain_on_overflow */
1061 ppc64_elf_unhandled_reloc
, /* special_function */
1062 "R_PPC64_PLT16_LO_DS", /* name */
1063 false, /* partial_inplace */
1065 0xfffc, /* dst_mask */
1066 false), /* pcrel_offset */
1068 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1069 HOWTO (R_PPC64_SECTOFF_DS
, /* type */
1071 1, /* size (0 = byte, 1 = short, 2 = long) */
1073 false, /* pc_relative */
1075 complain_overflow_bitfield
, /* complain_on_overflow */
1076 ppc64_elf_sectoff_reloc
, /* special_function */
1077 "R_PPC64_SECTOFF_DS", /* name */
1078 false, /* partial_inplace */
1080 0xfffc, /* dst_mask */
1081 false), /* pcrel_offset */
1083 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1084 HOWTO (R_PPC64_SECTOFF_LO_DS
, /* type */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1088 false, /* pc_relative */
1090 complain_overflow_dont
, /* complain_on_overflow */
1091 ppc64_elf_sectoff_reloc
, /* special_function */
1092 "R_PPC64_SECTOFF_LO_DS",/* name */
1093 false, /* partial_inplace */
1095 0xfffc, /* dst_mask */
1096 false), /* pcrel_offset */
1098 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1099 HOWTO (R_PPC64_TOC16_DS
, /* type */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1103 false, /* pc_relative */
1105 complain_overflow_signed
, /* complain_on_overflow */
1106 ppc64_elf_toc_reloc
, /* special_function */
1107 "R_PPC64_TOC16_DS", /* name */
1108 false, /* partial_inplace */
1110 0xfffc, /* dst_mask */
1111 false), /* pcrel_offset */
1113 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1114 HOWTO (R_PPC64_TOC16_LO_DS
, /* type */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1118 false, /* pc_relative */
1120 complain_overflow_dont
, /* complain_on_overflow */
1121 ppc64_elf_toc_reloc
, /* special_function */
1122 "R_PPC64_TOC16_LO_DS", /* name */
1123 false, /* partial_inplace */
1125 0xfffc, /* dst_mask */
1126 false), /* pcrel_offset */
1128 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1129 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1130 HOWTO (R_PPC64_PLTGOT16_DS
, /* type */
1132 1, /* size (0 = byte, 1 = short, 2 = long) */
1134 false, /* pc_relative */
1136 complain_overflow_signed
, /* complain_on_overflow */
1137 ppc64_elf_unhandled_reloc
, /* special_function */
1138 "R_PPC64_PLTGOT16_DS", /* name */
1139 false, /* partial_inplace */
1141 0xfffc, /* dst_mask */
1142 false), /* pcrel_offset */
1144 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1145 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1146 HOWTO (R_PPC64_PLTGOT16_LO_DS
,/* type */
1148 1, /* size (0 = byte, 1 = short, 2 = long) */
1150 false, /* pc_relative */
1152 complain_overflow_dont
, /* complain_on_overflow */
1153 ppc64_elf_unhandled_reloc
, /* special_function */
1154 "R_PPC64_PLTGOT16_LO_DS",/* name */
1155 false, /* partial_inplace */
1157 0xfffc, /* dst_mask */
1158 false), /* pcrel_offset */
1160 /* GNU extension to record C++ vtable hierarchy. */
1161 HOWTO (R_PPC64_GNU_VTINHERIT
, /* type */
1163 0, /* size (0 = byte, 1 = short, 2 = long) */
1165 false, /* pc_relative */
1167 complain_overflow_dont
, /* complain_on_overflow */
1168 NULL
, /* special_function */
1169 "R_PPC64_GNU_VTINHERIT", /* name */
1170 false, /* partial_inplace */
1173 false), /* pcrel_offset */
1175 /* GNU extension to record C++ vtable member usage. */
1176 HOWTO (R_PPC64_GNU_VTENTRY
, /* type */
1178 0, /* size (0 = byte, 1 = short, 2 = long) */
1180 false, /* pc_relative */
1182 complain_overflow_dont
, /* complain_on_overflow */
1183 NULL
, /* special_function */
1184 "R_PPC64_GNU_VTENTRY", /* name */
1185 false, /* partial_inplace */
1188 false), /* pcrel_offset */
1192 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1198 unsigned int i
, type
;
1201 i
< sizeof (ppc64_elf_howto_raw
) / sizeof (ppc64_elf_howto_raw
[0]);
1204 type
= ppc64_elf_howto_raw
[i
].type
;
1205 BFD_ASSERT (type
< (sizeof (ppc64_elf_howto_table
)
1206 / sizeof (ppc64_elf_howto_table
[0])));
1207 ppc64_elf_howto_table
[type
] = &ppc64_elf_howto_raw
[i
];
1211 static reloc_howto_type
*
1212 ppc64_elf_reloc_type_lookup (abfd
, code
)
1213 bfd
*abfd ATTRIBUTE_UNUSED
;
1214 bfd_reloc_code_real_type code
;
1216 enum elf_ppc_reloc_type ppc_reloc
= R_PPC_NONE
;
1218 if (!ppc64_elf_howto_table
[R_PPC64_ADDR32
])
1219 /* Initialize howto table if needed. */
1225 return (reloc_howto_type
*) NULL
;
1227 case BFD_RELOC_NONE
: ppc_reloc
= R_PPC64_NONE
;
1229 case BFD_RELOC_32
: ppc_reloc
= R_PPC64_ADDR32
;
1231 case BFD_RELOC_PPC_BA26
: ppc_reloc
= R_PPC64_ADDR24
;
1233 case BFD_RELOC_16
: ppc_reloc
= R_PPC64_ADDR16
;
1235 case BFD_RELOC_LO16
: ppc_reloc
= R_PPC64_ADDR16_LO
;
1237 case BFD_RELOC_HI16
: ppc_reloc
= R_PPC64_ADDR16_HI
;
1239 case BFD_RELOC_HI16_S
: ppc_reloc
= R_PPC64_ADDR16_HA
;
1241 case BFD_RELOC_PPC_BA16
: ppc_reloc
= R_PPC64_ADDR14
;
1243 case BFD_RELOC_PPC_BA16_BRTAKEN
: ppc_reloc
= R_PPC64_ADDR14_BRTAKEN
;
1245 case BFD_RELOC_PPC_BA16_BRNTAKEN
: ppc_reloc
= R_PPC64_ADDR14_BRNTAKEN
;
1247 case BFD_RELOC_PPC_B26
: ppc_reloc
= R_PPC64_REL24
;
1249 case BFD_RELOC_PPC_B16
: ppc_reloc
= R_PPC64_REL14
;
1251 case BFD_RELOC_PPC_B16_BRTAKEN
: ppc_reloc
= R_PPC64_REL14_BRTAKEN
;
1253 case BFD_RELOC_PPC_B16_BRNTAKEN
: ppc_reloc
= R_PPC64_REL14_BRNTAKEN
;
1255 case BFD_RELOC_16_GOTOFF
: ppc_reloc
= R_PPC64_GOT16
;
1257 case BFD_RELOC_LO16_GOTOFF
: ppc_reloc
= R_PPC64_GOT16_LO
;
1259 case BFD_RELOC_HI16_GOTOFF
: ppc_reloc
= R_PPC64_GOT16_HI
;
1261 case BFD_RELOC_HI16_S_GOTOFF
: ppc_reloc
= R_PPC64_GOT16_HA
;
1263 case BFD_RELOC_PPC_COPY
: ppc_reloc
= R_PPC64_COPY
;
1265 case BFD_RELOC_PPC_GLOB_DAT
: ppc_reloc
= R_PPC64_GLOB_DAT
;
1267 case BFD_RELOC_32_PCREL
: ppc_reloc
= R_PPC64_REL32
;
1269 case BFD_RELOC_32_PLTOFF
: ppc_reloc
= R_PPC64_PLT32
;
1271 case BFD_RELOC_32_PLT_PCREL
: ppc_reloc
= R_PPC64_PLTREL32
;
1273 case BFD_RELOC_LO16_PLTOFF
: ppc_reloc
= R_PPC64_PLT16_LO
;
1275 case BFD_RELOC_HI16_PLTOFF
: ppc_reloc
= R_PPC64_PLT16_HI
;
1277 case BFD_RELOC_HI16_S_PLTOFF
: ppc_reloc
= R_PPC64_PLT16_HA
;
1279 case BFD_RELOC_16_BASEREL
: ppc_reloc
= R_PPC64_SECTOFF
;
1281 case BFD_RELOC_LO16_BASEREL
: ppc_reloc
= R_PPC64_SECTOFF_LO
;
1283 case BFD_RELOC_HI16_BASEREL
: ppc_reloc
= R_PPC64_SECTOFF_HI
;
1285 case BFD_RELOC_HI16_S_BASEREL
: ppc_reloc
= R_PPC64_SECTOFF_HA
;
1287 case BFD_RELOC_CTOR
: ppc_reloc
= R_PPC64_ADDR64
;
1289 case BFD_RELOC_64
: ppc_reloc
= R_PPC64_ADDR64
;
1291 case BFD_RELOC_PPC64_HIGHER
: ppc_reloc
= R_PPC64_ADDR16_HIGHER
;
1293 case BFD_RELOC_PPC64_HIGHER_S
: ppc_reloc
= R_PPC64_ADDR16_HIGHERA
;
1295 case BFD_RELOC_PPC64_HIGHEST
: ppc_reloc
= R_PPC64_ADDR16_HIGHEST
;
1297 case BFD_RELOC_PPC64_HIGHEST_S
: ppc_reloc
= R_PPC64_ADDR16_HIGHESTA
;
1299 case BFD_RELOC_64_PCREL
: ppc_reloc
= R_PPC64_REL64
;
1301 case BFD_RELOC_64_PLTOFF
: ppc_reloc
= R_PPC64_PLT64
;
1303 case BFD_RELOC_64_PLT_PCREL
: ppc_reloc
= R_PPC64_PLTREL64
;
1305 case BFD_RELOC_PPC_TOC16
: ppc_reloc
= R_PPC64_TOC16
;
1307 case BFD_RELOC_PPC64_TOC16_LO
: ppc_reloc
= R_PPC64_TOC16_LO
;
1309 case BFD_RELOC_PPC64_TOC16_HI
: ppc_reloc
= R_PPC64_TOC16_HI
;
1311 case BFD_RELOC_PPC64_TOC16_HA
: ppc_reloc
= R_PPC64_TOC16_HA
;
1313 case BFD_RELOC_PPC64_TOC
: ppc_reloc
= R_PPC64_TOC
;
1315 case BFD_RELOC_PPC64_PLTGOT16
: ppc_reloc
= R_PPC64_PLTGOT16
;
1317 case BFD_RELOC_PPC64_PLTGOT16_LO
: ppc_reloc
= R_PPC64_PLTGOT16_LO
;
1319 case BFD_RELOC_PPC64_PLTGOT16_HI
: ppc_reloc
= R_PPC64_PLTGOT16_HI
;
1321 case BFD_RELOC_PPC64_PLTGOT16_HA
: ppc_reloc
= R_PPC64_PLTGOT16_HA
;
1323 case BFD_RELOC_PPC64_ADDR16_DS
: ppc_reloc
= R_PPC64_ADDR16_DS
;
1325 case BFD_RELOC_PPC64_ADDR16_LO_DS
: ppc_reloc
= R_PPC64_ADDR16_LO_DS
;
1327 case BFD_RELOC_PPC64_GOT16_DS
: ppc_reloc
= R_PPC64_GOT16_DS
;
1329 case BFD_RELOC_PPC64_GOT16_LO_DS
: ppc_reloc
= R_PPC64_GOT16_LO_DS
;
1331 case BFD_RELOC_PPC64_PLT16_LO_DS
: ppc_reloc
= R_PPC64_PLT16_LO_DS
;
1333 case BFD_RELOC_PPC64_SECTOFF_DS
: ppc_reloc
= R_PPC64_SECTOFF_DS
;
1335 case BFD_RELOC_PPC64_SECTOFF_LO_DS
: ppc_reloc
= R_PPC64_SECTOFF_LO_DS
;
1337 case BFD_RELOC_PPC64_TOC16_DS
: ppc_reloc
= R_PPC64_TOC16_DS
;
1339 case BFD_RELOC_PPC64_TOC16_LO_DS
: ppc_reloc
= R_PPC64_TOC16_LO_DS
;
1341 case BFD_RELOC_PPC64_PLTGOT16_DS
: ppc_reloc
= R_PPC64_PLTGOT16_DS
;
1343 case BFD_RELOC_PPC64_PLTGOT16_LO_DS
: ppc_reloc
= R_PPC64_PLTGOT16_LO_DS
;
1345 case BFD_RELOC_VTABLE_INHERIT
: ppc_reloc
= R_PPC64_GNU_VTINHERIT
;
1347 case BFD_RELOC_VTABLE_ENTRY
: ppc_reloc
= R_PPC64_GNU_VTENTRY
;
1351 return ppc64_elf_howto_table
[(int) ppc_reloc
];
1354 /* Set the howto pointer for a PowerPC ELF reloc. */
1357 ppc64_elf_info_to_howto (abfd
, cache_ptr
, dst
)
1358 bfd
*abfd ATTRIBUTE_UNUSED
;
1360 Elf64_Internal_Rela
*dst
;
1364 /* Initialize howto table if needed. */
1365 if (!ppc64_elf_howto_table
[R_PPC64_ADDR32
])
1368 type
= ELF64_R_TYPE (dst
->r_info
);
1369 BFD_ASSERT (type
< (sizeof (ppc64_elf_howto_table
)
1370 / sizeof (ppc64_elf_howto_table
[0])));
1371 cache_ptr
->howto
= ppc64_elf_howto_table
[type
];
1374 /* Handle the R_PPC_ADDR16_HA and similar relocs. */
1376 static bfd_reloc_status_type
1377 ppc64_elf_ha_reloc (abfd
, reloc_entry
, symbol
, data
,
1378 input_section
, output_bfd
, error_message
)
1380 arelent
*reloc_entry
;
1383 asection
*input_section
;
1385 char **error_message
;
1387 /* If this is a relocatable link (output_bfd test tells us), just
1388 call the generic function. Any adjustment will be done at final
1390 if (output_bfd
!= NULL
)
1391 return bfd_elf_generic_reloc (abfd
, reloc_entry
, symbol
, data
,
1392 input_section
, output_bfd
, error_message
);
1394 /* Adjust the addend for sign extension of the low 16 bits.
1395 We won't actually be using the low 16 bits, so trashing them
1397 reloc_entry
->addend
+= 0x8000;
1398 return bfd_reloc_continue
;
1401 static bfd_reloc_status_type
1402 ppc64_elf_brtaken_reloc (abfd
, reloc_entry
, symbol
, data
,
1403 input_section
, output_bfd
, error_message
)
1405 arelent
*reloc_entry
;
1408 asection
*input_section
;
1410 char **error_message
;
1413 enum elf_ppc_reloc_type r_type
;
1414 bfd_size_type octets
;
1415 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
1416 boolean is_power4
= false;
1418 /* If this is a relocatable link (output_bfd test tells us), just
1419 call the generic function. Any adjustment will be done at final
1421 if (output_bfd
!= NULL
)
1422 return bfd_elf_generic_reloc (abfd
, reloc_entry
, symbol
, data
,
1423 input_section
, output_bfd
, error_message
);
1425 octets
= reloc_entry
->address
* bfd_octets_per_byte (abfd
);
1426 insn
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ octets
);
1427 insn
&= ~(0x01 << 21);
1428 r_type
= (enum elf_ppc_reloc_type
) reloc_entry
->howto
->type
;
1429 if (r_type
== R_PPC64_ADDR14_BRTAKEN
1430 || r_type
== R_PPC64_REL14_BRTAKEN
)
1431 insn
|= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
1435 /* Set 'a' bit. This is 0b00010 in BO field for branch
1436 on CR(BI) insns (BO == 001at or 011at), and 0b01000
1437 for branch on CTR insns (BO == 1a00t or 1a01t). */
1438 if ((insn
& (0x14 << 21)) == (0x04 << 21))
1440 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
1443 return bfd_reloc_continue
;
1450 if (!bfd_is_com_section (symbol
->section
))
1451 target
= symbol
->value
;
1452 target
+= symbol
->section
->output_section
->vma
;
1453 target
+= symbol
->section
->output_offset
;
1454 target
+= reloc_entry
->addend
;
1456 from
= (reloc_entry
->address
1457 + input_section
->output_offset
1458 + input_section
->output_section
->vma
);
1460 /* Invert 'y' bit if not the default. */
1461 if ((bfd_signed_vma
) (target
- from
) < 0)
1464 bfd_put_32 (abfd
, (bfd_vma
) insn
, (bfd_byte
*) data
+ octets
);
1465 return bfd_reloc_continue
;
1468 static bfd_reloc_status_type
1469 ppc64_elf_sectoff_reloc (abfd
, reloc_entry
, symbol
, data
,
1470 input_section
, output_bfd
, error_message
)
1472 arelent
*reloc_entry
;
1475 asection
*input_section
;
1477 char **error_message
;
1479 /* If this is a relocatable link (output_bfd test tells us), just
1480 call the generic function. Any adjustment will be done at final
1482 if (output_bfd
!= NULL
)
1483 return bfd_elf_generic_reloc (abfd
, reloc_entry
, symbol
, data
,
1484 input_section
, output_bfd
, error_message
);
1486 /* Subtract the symbol section base address. */
1487 reloc_entry
->addend
-= symbol
->section
->output_section
->vma
;
1488 return bfd_reloc_continue
;
1491 static bfd_reloc_status_type
1492 ppc64_elf_sectoff_ha_reloc (abfd
, reloc_entry
, symbol
, data
,
1493 input_section
, output_bfd
, error_message
)
1495 arelent
*reloc_entry
;
1498 asection
*input_section
;
1500 char **error_message
;
1502 /* If this is a relocatable link (output_bfd test tells us), just
1503 call the generic function. Any adjustment will be done at final
1505 if (output_bfd
!= NULL
)
1506 return bfd_elf_generic_reloc (abfd
, reloc_entry
, symbol
, data
,
1507 input_section
, output_bfd
, error_message
);
1509 /* Subtract the symbol section base address. */
1510 reloc_entry
->addend
-= symbol
->section
->output_section
->vma
;
1512 /* Adjust the addend for sign extension of the low 16 bits. */
1513 reloc_entry
->addend
+= 0x8000;
1514 return bfd_reloc_continue
;
1517 static bfd_reloc_status_type
1518 ppc64_elf_toc_reloc (abfd
, reloc_entry
, symbol
, data
,
1519 input_section
, output_bfd
, error_message
)
1521 arelent
*reloc_entry
;
1524 asection
*input_section
;
1526 char **error_message
;
1530 /* If this is a relocatable link (output_bfd test tells us), just
1531 call the generic function. Any adjustment will be done at final
1533 if (output_bfd
!= NULL
)
1534 return bfd_elf_generic_reloc (abfd
, reloc_entry
, symbol
, data
,
1535 input_section
, output_bfd
, error_message
);
1537 TOCstart
= _bfd_get_gp_value (input_section
->output_section
->owner
);
1539 TOCstart
= ppc64_elf_toc (input_section
->output_section
->owner
);
1541 /* Subtract the TOC base address. */
1542 reloc_entry
->addend
-= TOCstart
+ TOC_BASE_OFF
;
1543 return bfd_reloc_continue
;
1546 static bfd_reloc_status_type
1547 ppc64_elf_toc_ha_reloc (abfd
, reloc_entry
, symbol
, data
,
1548 input_section
, output_bfd
, error_message
)
1550 arelent
*reloc_entry
;
1553 asection
*input_section
;
1555 char **error_message
;
1559 /* If this is a relocatable link (output_bfd test tells us), just
1560 call the generic function. Any adjustment will be done at final
1562 if (output_bfd
!= NULL
)
1563 return bfd_elf_generic_reloc (abfd
, reloc_entry
, symbol
, data
,
1564 input_section
, output_bfd
, error_message
);
1566 TOCstart
= _bfd_get_gp_value (input_section
->output_section
->owner
);
1568 TOCstart
= ppc64_elf_toc (input_section
->output_section
->owner
);
1570 /* Subtract the TOC base address. */
1571 reloc_entry
->addend
-= TOCstart
+ TOC_BASE_OFF
;
1573 /* Adjust the addend for sign extension of the low 16 bits. */
1574 reloc_entry
->addend
+= 0x8000;
1575 return bfd_reloc_continue
;
1578 static bfd_reloc_status_type
1579 ppc64_elf_toc64_reloc (abfd
, reloc_entry
, symbol
, data
,
1580 input_section
, output_bfd
, error_message
)
1582 arelent
*reloc_entry
;
1585 asection
*input_section
;
1587 char **error_message
;
1590 bfd_size_type octets
;
1592 /* If this is a relocatable link (output_bfd test tells us), just
1593 call the generic function. Any adjustment will be done at final
1595 if (output_bfd
!= NULL
)
1596 return bfd_elf_generic_reloc (abfd
, reloc_entry
, symbol
, data
,
1597 input_section
, output_bfd
, error_message
);
1599 TOCstart
= _bfd_get_gp_value (input_section
->output_section
->owner
);
1601 TOCstart
= ppc64_elf_toc (input_section
->output_section
->owner
);
1603 octets
= reloc_entry
->address
* bfd_octets_per_byte (abfd
);
1604 bfd_put_64 (abfd
, TOCstart
+ TOC_BASE_OFF
, (bfd_byte
*) data
+ octets
);
1605 return bfd_reloc_ok
;
1608 static bfd_reloc_status_type
1609 ppc64_elf_unhandled_reloc (abfd
, reloc_entry
, symbol
, data
,
1610 input_section
, output_bfd
, error_message
)
1612 arelent
*reloc_entry
;
1615 asection
*input_section
;
1617 char **error_message
;
1619 /* If this is a relocatable link (output_bfd test tells us), just
1620 call the generic function. Any adjustment will be done at final
1622 if (output_bfd
!= NULL
)
1623 return bfd_elf_generic_reloc (abfd
, reloc_entry
, symbol
, data
,
1624 input_section
, output_bfd
, error_message
);
1626 if (error_message
!= NULL
)
1628 static char buf
[60];
1629 sprintf (buf
, "generic linker can't handle %s",
1630 reloc_entry
->howto
->name
);
1631 *error_message
= buf
;
1633 return bfd_reloc_dangerous
;
1636 /* Return symbol info as per usual for ELF targets, except that
1637 symbols in .opd are given 'd' or 'D' for type. */
1640 ppc64_elf_get_symbol_info (abfd
, symbol
, ret
)
1645 _bfd_elf_get_symbol_info (abfd
, symbol
, ret
);
1646 if (ret
->type
== '?'
1647 && (symbol
->flags
& (BSF_GLOBAL
| BSF_LOCAL
)) != 0
1648 && strcmp (symbol
->section
->name
, ".opd") == 0)
1649 ret
->type
= (symbol
->flags
& BSF_GLOBAL
) != 0 ? 'D' : 'd';
1652 /* Function to set whether a module needs the -mrelocatable bit set. */
1655 ppc64_elf_set_private_flags (abfd
, flags
)
1659 BFD_ASSERT (!elf_flags_init (abfd
)
1660 || elf_elfheader (abfd
)->e_flags
== flags
);
1662 elf_elfheader (abfd
)->e_flags
= flags
;
1663 elf_flags_init (abfd
) = true;
1667 /* Merge backend specific data from an object file to the output
1668 object file when linking. */
1670 ppc64_elf_merge_private_bfd_data (ibfd
, obfd
)
1678 /* Check if we have the same endianess. */
1679 if (ibfd
->xvec
->byteorder
!= obfd
->xvec
->byteorder
1680 && obfd
->xvec
->byteorder
!= BFD_ENDIAN_UNKNOWN
)
1684 if (bfd_big_endian (ibfd
))
1685 msg
= _("%s: compiled for a big endian system and target is little endian");
1687 msg
= _("%s: compiled for a little endian system and target is big endian");
1689 (*_bfd_error_handler
) (msg
, bfd_archive_filename (ibfd
));
1691 bfd_set_error (bfd_error_wrong_format
);
1695 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1696 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1699 new_flags
= elf_elfheader (ibfd
)->e_flags
;
1700 old_flags
= elf_elfheader (obfd
)->e_flags
;
1701 if (!elf_flags_init (obfd
))
1703 /* First call, no flags set. */
1704 elf_flags_init (obfd
) = true;
1705 elf_elfheader (obfd
)->e_flags
= new_flags
;
1708 else if (new_flags
== old_flags
)
1709 /* Compatible flags are ok. */
1714 /* Incompatible flags. Warn about -mrelocatable mismatch.
1715 Allow -mrelocatable-lib to be linked with either. */
1717 if ((new_flags
& EF_PPC_RELOCATABLE
) != 0
1718 && (old_flags
& (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
)) == 0)
1721 (*_bfd_error_handler
)
1722 (_("%s: compiled with -mrelocatable and linked with modules compiled normally"),
1723 bfd_archive_filename (ibfd
));
1725 else if ((new_flags
& (EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
)) == 0
1726 && (old_flags
& EF_PPC_RELOCATABLE
) != 0)
1729 (*_bfd_error_handler
)
1730 (_("%s: compiled normally and linked with modules compiled with -mrelocatable"),
1731 bfd_archive_filename (ibfd
));
1734 /* The output is -mrelocatable-lib iff both the input files are. */
1735 if (! (new_flags
& EF_PPC_RELOCATABLE_LIB
))
1736 elf_elfheader (obfd
)->e_flags
&= ~EF_PPC_RELOCATABLE_LIB
;
1738 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
1739 but each input file is either -mrelocatable or -mrelocatable-lib. */
1740 if (! (elf_elfheader (obfd
)->e_flags
& EF_PPC_RELOCATABLE_LIB
)
1741 && (new_flags
& (EF_PPC_RELOCATABLE_LIB
| EF_PPC_RELOCATABLE
))
1742 && (old_flags
& (EF_PPC_RELOCATABLE_LIB
| EF_PPC_RELOCATABLE
)))
1743 elf_elfheader (obfd
)->e_flags
|= EF_PPC_RELOCATABLE
;
1745 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit
1746 if any module uses it. */
1747 elf_elfheader (obfd
)->e_flags
|= (new_flags
& EF_PPC_EMB
);
1749 new_flags
&= ~(EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
| EF_PPC_EMB
);
1750 old_flags
&= ~(EF_PPC_RELOCATABLE
| EF_PPC_RELOCATABLE_LIB
| EF_PPC_EMB
);
1752 /* Warn about any other mismatches. */
1753 if (new_flags
!= old_flags
)
1756 (*_bfd_error_handler
)
1757 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
1758 bfd_archive_filename (ibfd
), (long) new_flags
, (long) old_flags
);
1763 bfd_set_error (bfd_error_bad_value
);
1771 /* Handle a PowerPC specific section when reading an object file. This
1772 is called when elfcode.h finds a section with an unknown type. */
1775 ppc64_elf_section_from_shdr (abfd
, hdr
, name
)
1777 Elf64_Internal_Shdr
*hdr
;
1783 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1786 newsect
= hdr
->bfd_section
;
1787 flags
= bfd_get_section_flags (abfd
, newsect
);
1788 if (hdr
->sh_flags
& SHF_EXCLUDE
)
1789 flags
|= SEC_EXCLUDE
;
1791 if (hdr
->sh_type
== SHT_ORDERED
)
1792 flags
|= SEC_SORT_ENTRIES
;
1794 bfd_set_section_flags (abfd
, newsect
, flags
);
1798 /* The following functions are specific to the ELF linker, while
1799 functions above are used generally. Those named ppc64_elf_* are
1800 called by the main ELF linker code. They appear in this file more
1801 or less in the order in which they are called. eg.
1802 ppc64_elf_check_relocs is called early in the link process,
1803 ppc64_elf_finish_dynamic_sections is one of the last functions
1806 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
1807 functions have both a function code symbol and a function descriptor
1808 symbol. A call to foo in a relocatable object file looks like:
1815 The function definition in another object file might be:
1819 . .quad .TOC.@tocbase
1825 When the linker resolves the call during a static link, the branch
1826 unsurprisingly just goes to .foo and the .opd information is unused.
1827 If the function definition is in a shared library, things are a little
1828 different: The call goes via a plt call stub, the opd information gets
1829 copied to the plt, and the linker patches the nop.
1837 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
1838 . addi 12,12,Lfoo@toc@l # is slightly optimised, but
1839 . std 2,40(1) # this is the general idea
1847 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
1849 The "reloc ()" notation is supposed to indicate that the linker emits
1850 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
1853 What are the difficulties here? Well, firstly, the relocations
1854 examined by the linker in check_relocs are against the function code
1855 sym .foo, while the dynamic relocation in the plt is emitted against
1856 the function descriptor symbol, foo. Somewhere along the line, we need
1857 to carefully copy dynamic link information from one symbol to the other.
1858 Secondly, the generic part of the elf linker will make .foo a dynamic
1859 symbol as is normal for most other backends. We need foo dynamic
1860 instead, at least for an application final link. However, when
1861 creating a shared library containing foo, we need to have both symbols
1862 dynamic so that references to .foo are satisfied during the early
1863 stages of linking. Otherwise the linker might decide to pull in a
1864 definition from some other object, eg. a static library. */
1866 /* The linker needs to keep track of the number of relocs that it
1867 decides to copy as dynamic relocs in check_relocs for each symbol.
1868 This is so that it can later discard them if they are found to be
1869 unnecessary. We store the information in a field extending the
1870 regular ELF linker hash table. */
1872 struct ppc_dyn_relocs
1874 struct ppc_dyn_relocs
*next
;
1876 /* The input section of the reloc. */
1879 /* Total number of relocs copied for the input section. */
1880 bfd_size_type count
;
1882 /* Number of pc-relative relocs copied for the input section. */
1883 bfd_size_type pc_count
;
1886 /* Of those relocs that might be copied as dynamic relocs, this macro
1887 selects between relative and absolute types. */
1889 #define IS_ABSOLUTE_RELOC(RTYPE) \
1890 ((RTYPE) != R_PPC64_REL32 \
1891 && (RTYPE) != R_PPC64_REL64 \
1892 && (RTYPE) != R_PPC64_ADDR30)
1894 /* Section name for stubs is the associated section name plus this
1896 #define STUB_SUFFIX ".stub"
1899 ppc_stub_long_branch:
1900 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
1901 destination, but a 24 bit branch in a stub section will reach.
1904 ppc_stub_plt_branch:
1905 Similar to the above, but a 24 bit branch in the stub section won't
1906 reach its destination.
1907 . addis %r12,%r2,xxx@ha
1908 . ld %r11,xxx@l(%r12)
1913 Used to call a function in a shared library.
1914 . addis %r12,%r2,xxx@ha
1916 . ld %r11,xxx+0@l(%r12)
1917 . ld %r2,xxx+8@l(%r12)
1919 . ld %r11,xxx+16@l(%r12)
1923 enum ppc_stub_type
{
1925 ppc_stub_long_branch
,
1926 ppc_stub_plt_branch
,
1930 struct ppc_stub_hash_entry
{
1932 /* Base hash table entry structure. */
1933 struct bfd_hash_entry root
;
1935 /* The stub section. */
1938 /* Offset within stub_sec of the beginning of this stub. */
1939 bfd_vma stub_offset
;
1941 /* Given the symbol's value and its section we can determine its final
1942 value when building the stubs (so the stub knows where to jump. */
1943 bfd_vma target_value
;
1944 asection
*target_section
;
1946 enum ppc_stub_type stub_type
;
1948 /* The symbol table entry, if any, that this was derived from. */
1949 struct ppc_link_hash_entry
*h
;
1951 /* Where this stub is being called from, or, in the case of combined
1952 stub sections, the first input section in the group. */
1956 struct ppc_branch_hash_entry
{
1958 /* Base hash table entry structure. */
1959 struct bfd_hash_entry root
;
1961 /* Offset within .branch_lt. */
1962 unsigned int offset
;
1964 /* Generation marker. */
1968 struct ppc_link_hash_entry
1970 struct elf_link_hash_entry elf
;
1972 /* A pointer to the most recently used stub hash entry against this
1974 struct ppc_stub_hash_entry
*stub_cache
;
1976 /* Track dynamic relocs copied for this symbol. */
1977 struct ppc_dyn_relocs
*dyn_relocs
;
1979 /* Link between function code and descriptor symbols. */
1980 struct elf_link_hash_entry
*oh
;
1982 /* Flag function code and descriptor symbols. */
1983 unsigned int is_func
:1;
1984 unsigned int is_func_descriptor
:1;
1987 /* ppc64 ELF linker hash table. */
1989 struct ppc_link_hash_table
1991 struct elf_link_hash_table elf
;
1993 /* The stub hash table. */
1994 struct bfd_hash_table stub_hash_table
;
1996 /* Another hash table for plt_branch stubs. */
1997 struct bfd_hash_table branch_hash_table
;
1999 /* Linker stub bfd. */
2002 /* Linker call-backs. */
2003 asection
* (*add_stub_section
) PARAMS ((const char *, asection
*));
2004 void (*layout_sections_again
) PARAMS ((void));
2006 /* Array to keep track of which stub sections have been created, and
2007 information on stub grouping. */
2009 /* This is the section to which stubs in the group will be attached. */
2011 /* The stub section. */
2015 /* Assorted information used by ppc64_elf_size_stubs. */
2016 unsigned int bfd_count
;
2018 asection
**input_list
;
2019 Elf_Internal_Sym
**all_local_syms
;
2021 /* Short-cuts to get to dynamic linker sections. */
2034 unsigned int stub_error
;
2036 /* Flag set when small branches are detected. Used to
2037 select suitable defaults for the stub group size. */
2038 unsigned int has_14bit_branch
;
2040 /* Set if we detect a reference undefined weak symbol. */
2041 unsigned int have_undefweak
;
2043 /* Incremented every time we size stubs. */
2044 unsigned int stub_iteration
;
2046 /* Small local sym to section mapping cache. */
2047 struct sym_sec_cache sym_sec
;
2050 static struct bfd_hash_entry
*stub_hash_newfunc
2051 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
2052 static struct bfd_hash_entry
*branch_hash_newfunc
2053 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
2054 static struct bfd_hash_entry
*link_hash_newfunc
2055 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
2056 static struct bfd_link_hash_table
*ppc64_elf_link_hash_table_create
2058 static void ppc64_elf_link_hash_table_free
2059 PARAMS ((struct bfd_link_hash_table
*));
2060 static char *ppc_stub_name
2061 PARAMS ((const asection
*, const asection
*,
2062 const struct ppc_link_hash_entry
*, const Elf_Internal_Rela
*));
2063 static struct ppc_stub_hash_entry
*ppc_get_stub_entry
2064 PARAMS ((const asection
*, const asection
*, struct elf_link_hash_entry
*,
2065 const Elf_Internal_Rela
*, struct ppc_link_hash_table
*));
2066 static struct ppc_stub_hash_entry
*ppc_add_stub
2067 PARAMS ((const char *, asection
*, struct ppc_link_hash_table
*));
2068 static boolean create_linkage_sections
2069 PARAMS ((bfd
*, struct bfd_link_info
*));
2070 static boolean create_got_section
2071 PARAMS ((bfd
*, struct bfd_link_info
*));
2072 static boolean ppc64_elf_create_dynamic_sections
2073 PARAMS ((bfd
*, struct bfd_link_info
*));
2074 static void ppc64_elf_copy_indirect_symbol
2075 PARAMS ((struct elf_link_hash_entry
*, struct elf_link_hash_entry
*));
2076 static boolean ppc64_elf_check_relocs
2077 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
2078 const Elf_Internal_Rela
*));
2079 static asection
* ppc64_elf_gc_mark_hook
2080 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Rela
*rel
,
2081 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
));
2082 static boolean ppc64_elf_gc_sweep_hook
2083 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
, asection
*sec
,
2084 const Elf_Internal_Rela
*relocs
));
2085 static boolean func_desc_adjust
2086 PARAMS ((struct elf_link_hash_entry
*, PTR
));
2087 static boolean ppc64_elf_func_desc_adjust
2088 PARAMS ((bfd
*, struct bfd_link_info
*));
2089 static boolean ppc64_elf_adjust_dynamic_symbol
2090 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*));
2091 static void ppc64_elf_hide_symbol
2092 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*, boolean
));
2093 static boolean allocate_dynrelocs
2094 PARAMS ((struct elf_link_hash_entry
*, PTR
));
2095 static boolean readonly_dynrelocs
2096 PARAMS ((struct elf_link_hash_entry
*, PTR
));
2097 static enum elf_reloc_type_class ppc64_elf_reloc_type_class
2098 PARAMS ((const Elf_Internal_Rela
*));
2099 static boolean ppc64_elf_size_dynamic_sections
2100 PARAMS ((bfd
*, struct bfd_link_info
*));
2101 static INLINE
enum ppc_stub_type ppc_type_of_stub
2102 PARAMS ((asection
*, const Elf_Internal_Rela
*,
2103 struct ppc_link_hash_entry
**, bfd_vma
));
2104 static bfd_byte
*build_plt_stub
2105 PARAMS ((bfd
*, bfd_byte
*, int, int));
2106 static boolean ppc_build_one_stub
2107 PARAMS ((struct bfd_hash_entry
*, PTR
));
2108 static boolean ppc_size_one_stub
2109 PARAMS ((struct bfd_hash_entry
*, PTR
));
2110 static void group_sections
2111 PARAMS ((struct ppc_link_hash_table
*, bfd_size_type
, boolean
));
2112 static boolean get_local_syms
2113 PARAMS ((bfd
*, struct ppc_link_hash_table
*));
2114 static boolean ppc64_elf_fake_sections
2115 PARAMS ((bfd
*, Elf64_Internal_Shdr
*, asection
*));
2116 static boolean ppc64_elf_relocate_section
2117 PARAMS ((bfd
*, struct bfd_link_info
*info
, bfd
*, asection
*, bfd_byte
*,
2118 Elf_Internal_Rela
*relocs
, Elf_Internal_Sym
*local_syms
,
2120 static boolean ppc64_elf_finish_dynamic_symbol
2121 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*,
2122 Elf_Internal_Sym
*));
2123 static boolean ppc64_elf_finish_dynamic_sections
2124 PARAMS ((bfd
*, struct bfd_link_info
*));
2126 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2128 #define ppc_hash_table(p) \
2129 ((struct ppc_link_hash_table *) ((p)->hash))
2131 #define ppc_stub_hash_lookup(table, string, create, copy) \
2132 ((struct ppc_stub_hash_entry *) \
2133 bfd_hash_lookup ((table), (string), (create), (copy)))
2135 #define ppc_branch_hash_lookup(table, string, create, copy) \
2136 ((struct ppc_branch_hash_entry *) \
2137 bfd_hash_lookup ((table), (string), (create), (copy)))
2139 /* Create an entry in the stub hash table. */
2141 static struct bfd_hash_entry
*
2142 stub_hash_newfunc (entry
, table
, string
)
2143 struct bfd_hash_entry
*entry
;
2144 struct bfd_hash_table
*table
;
2147 /* Allocate the structure if it has not already been allocated by a
2151 entry
= bfd_hash_allocate (table
, sizeof (struct ppc_stub_hash_entry
));
2156 /* Call the allocation method of the superclass. */
2157 entry
= bfd_hash_newfunc (entry
, table
, string
);
2160 struct ppc_stub_hash_entry
*eh
;
2162 /* Initialize the local fields. */
2163 eh
= (struct ppc_stub_hash_entry
*) entry
;
2164 eh
->stub_sec
= NULL
;
2165 eh
->stub_offset
= 0;
2166 eh
->target_value
= 0;
2167 eh
->target_section
= NULL
;
2168 eh
->stub_type
= ppc_stub_none
;
2176 /* Create an entry in the branch hash table. */
2178 static struct bfd_hash_entry
*
2179 branch_hash_newfunc (entry
, table
, string
)
2180 struct bfd_hash_entry
*entry
;
2181 struct bfd_hash_table
*table
;
2184 /* Allocate the structure if it has not already been allocated by a
2188 entry
= bfd_hash_allocate (table
, sizeof (struct ppc_branch_hash_entry
));
2193 /* Call the allocation method of the superclass. */
2194 entry
= bfd_hash_newfunc (entry
, table
, string
);
2197 struct ppc_branch_hash_entry
*eh
;
2199 /* Initialize the local fields. */
2200 eh
= (struct ppc_branch_hash_entry
*) entry
;
2208 /* Create an entry in a ppc64 ELF linker hash table. */
2210 static struct bfd_hash_entry
*
2211 link_hash_newfunc (entry
, table
, string
)
2212 struct bfd_hash_entry
*entry
;
2213 struct bfd_hash_table
*table
;
2216 /* Allocate the structure if it has not already been allocated by a
2220 entry
= bfd_hash_allocate (table
, sizeof (struct ppc_link_hash_entry
));
2225 /* Call the allocation method of the superclass. */
2226 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
2229 struct ppc_link_hash_entry
*eh
= (struct ppc_link_hash_entry
*) entry
;
2231 eh
->stub_cache
= NULL
;
2232 eh
->dyn_relocs
= NULL
;
2235 eh
->is_func_descriptor
= 0;
2241 /* Create a ppc64 ELF linker hash table. */
2243 static struct bfd_link_hash_table
*
2244 ppc64_elf_link_hash_table_create (abfd
)
2247 struct ppc_link_hash_table
*htab
;
2248 bfd_size_type amt
= sizeof (struct ppc_link_hash_table
);
2250 htab
= (struct ppc_link_hash_table
*) bfd_malloc (amt
);
2254 if (! _bfd_elf_link_hash_table_init (&htab
->elf
, abfd
, link_hash_newfunc
))
2260 /* Init the stub hash table too. */
2261 if (!bfd_hash_table_init (&htab
->stub_hash_table
, stub_hash_newfunc
))
2264 /* And the branch hash table. */
2265 if (!bfd_hash_table_init (&htab
->branch_hash_table
, branch_hash_newfunc
))
2268 htab
->stub_bfd
= NULL
;
2269 htab
->add_stub_section
= NULL
;
2270 htab
->layout_sections_again
= NULL
;
2271 htab
->stub_group
= NULL
;
2273 htab
->srelgot
= NULL
;
2275 htab
->srelplt
= NULL
;
2276 htab
->sdynbss
= NULL
;
2277 htab
->srelbss
= NULL
;
2278 htab
->sglink
= NULL
;
2281 htab
->srelbrlt
= NULL
;
2282 htab
->stub_error
= 0;
2283 htab
->has_14bit_branch
= 0;
2284 htab
->have_undefweak
= 0;
2285 htab
->stub_iteration
= 0;
2286 htab
->sym_sec
.abfd
= NULL
;
2288 return &htab
->elf
.root
;
2291 /* Free the derived linker hash table. */
2294 ppc64_elf_link_hash_table_free (hash
)
2295 struct bfd_link_hash_table
*hash
;
2297 struct ppc_link_hash_table
*ret
= (struct ppc_link_hash_table
*) hash
;
2299 bfd_hash_table_free (&ret
->stub_hash_table
);
2300 bfd_hash_table_free (&ret
->branch_hash_table
);
2301 _bfd_generic_link_hash_table_free (hash
);
2304 /* Build a name for an entry in the stub hash table. */
2307 ppc_stub_name (input_section
, sym_sec
, h
, rel
)
2308 const asection
*input_section
;
2309 const asection
*sym_sec
;
2310 const struct ppc_link_hash_entry
*h
;
2311 const Elf_Internal_Rela
*rel
;
2316 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
2317 offsets from a sym as a branch target? In fact, we could
2318 probably assume the addend is always zero. */
2319 BFD_ASSERT (((int) rel
->r_addend
& 0xffffffff) == rel
->r_addend
);
2323 len
= 8 + 1 + strlen (h
->elf
.root
.root
.string
) + 1 + 8 + 1;
2324 stub_name
= bfd_malloc (len
);
2325 if (stub_name
!= NULL
)
2327 sprintf (stub_name
, "%08x_%s+%x",
2328 input_section
->id
& 0xffffffff,
2329 h
->elf
.root
.root
.string
,
2330 (int) rel
->r_addend
& 0xffffffff);
2335 len
= 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2336 stub_name
= bfd_malloc (len
);
2337 if (stub_name
!= NULL
)
2339 sprintf (stub_name
, "%08x_%x:%x+%x",
2340 input_section
->id
& 0xffffffff,
2341 sym_sec
->id
& 0xffffffff,
2342 (int) ELF64_R_SYM (rel
->r_info
) & 0xffffffff,
2343 (int) rel
->r_addend
& 0xffffffff);
2349 /* Look up an entry in the stub hash. Stub entries are cached because
2350 creating the stub name takes a bit of time. */
2352 static struct ppc_stub_hash_entry
*
2353 ppc_get_stub_entry (input_section
, sym_sec
, hash
, rel
, htab
)
2354 const asection
*input_section
;
2355 const asection
*sym_sec
;
2356 struct elf_link_hash_entry
*hash
;
2357 const Elf_Internal_Rela
*rel
;
2358 struct ppc_link_hash_table
*htab
;
2360 struct ppc_stub_hash_entry
*stub_entry
;
2361 struct ppc_link_hash_entry
*h
= (struct ppc_link_hash_entry
*) hash
;
2362 const asection
*id_sec
;
2364 /* If this input section is part of a group of sections sharing one
2365 stub section, then use the id of the first section in the group.
2366 Stub names need to include a section id, as there may well be
2367 more than one stub used to reach say, printf, and we need to
2368 distinguish between them. */
2369 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
2371 if (h
!= NULL
&& h
->stub_cache
!= NULL
2372 && h
->stub_cache
->h
== h
2373 && h
->stub_cache
->id_sec
== id_sec
)
2375 stub_entry
= h
->stub_cache
;
2381 stub_name
= ppc_stub_name (id_sec
, sym_sec
, h
, rel
);
2382 if (stub_name
== NULL
)
2385 stub_entry
= ppc_stub_hash_lookup (&htab
->stub_hash_table
,
2386 stub_name
, false, false);
2388 h
->stub_cache
= stub_entry
;
2396 /* Add a new stub entry to the stub hash. Not all fields of the new
2397 stub entry are initialised. */
2399 static struct ppc_stub_hash_entry
*
2400 ppc_add_stub (stub_name
, section
, htab
)
2401 const char *stub_name
;
2403 struct ppc_link_hash_table
*htab
;
2407 struct ppc_stub_hash_entry
*stub_entry
;
2409 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
2410 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
2411 if (stub_sec
== NULL
)
2413 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
2414 if (stub_sec
== NULL
)
2420 namelen
= strlen (link_sec
->name
);
2421 len
= namelen
+ sizeof (STUB_SUFFIX
);
2422 s_name
= bfd_alloc (htab
->stub_bfd
, len
);
2426 memcpy (s_name
, link_sec
->name
, namelen
);
2427 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
2428 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
);
2429 if (stub_sec
== NULL
)
2431 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
2433 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
2436 /* Enter this entry into the linker stub hash table. */
2437 stub_entry
= ppc_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
2439 if (stub_entry
== NULL
)
2441 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
2442 bfd_archive_filename (section
->owner
),
2447 stub_entry
->stub_sec
= stub_sec
;
2448 stub_entry
->stub_offset
= 0;
2449 stub_entry
->id_sec
= link_sec
;
2453 /* Create sections for linker generated code. */
2456 create_linkage_sections (dynobj
, info
)
2458 struct bfd_link_info
*info
;
2460 struct ppc_link_hash_table
*htab
;
2463 htab
= ppc_hash_table (info
);
2465 /* Create .sfpr for code to save and restore fp regs. */
2466 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_READONLY
2467 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
2468 htab
->sfpr
= bfd_make_section_anyway (dynobj
, ".sfpr");
2469 if (htab
->sfpr
== NULL
2470 || ! bfd_set_section_flags (dynobj
, htab
->sfpr
, flags
)
2471 || ! bfd_set_section_alignment (dynobj
, htab
->sfpr
, 2))
2474 /* Create .glink for lazy dynamic linking support. */
2475 htab
->sglink
= bfd_make_section_anyway (dynobj
, ".glink");
2476 if (htab
->sglink
== NULL
2477 || ! bfd_set_section_flags (dynobj
, htab
->sglink
, flags
)
2478 || ! bfd_set_section_alignment (dynobj
, htab
->sglink
, 2))
2481 /* Create .branch_lt for plt_branch stubs. */
2482 flags
= (SEC_ALLOC
| SEC_LOAD
2483 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
2484 htab
->sbrlt
= bfd_make_section_anyway (dynobj
, ".branch_lt");
2485 if (htab
->sbrlt
== NULL
2486 || ! bfd_set_section_flags (dynobj
, htab
->sbrlt
, flags
)
2487 || ! bfd_set_section_alignment (dynobj
, htab
->sbrlt
, 3))
2492 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
2493 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
2494 htab
->srelbrlt
= bfd_make_section (dynobj
, ".rela.branch_lt");
2496 || ! bfd_set_section_flags (dynobj
, htab
->srelbrlt
, flags
)
2497 || ! bfd_set_section_alignment (dynobj
, htab
->srelbrlt
, 3))
2503 /* Create .got and .rela.got sections in DYNOBJ, and set up
2504 shortcuts to them in our hash table. */
2507 create_got_section (dynobj
, info
)
2509 struct bfd_link_info
*info
;
2511 struct ppc_link_hash_table
*htab
;
2513 if (! _bfd_elf_create_got_section (dynobj
, info
))
2516 htab
= ppc_hash_table (info
);
2517 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
2521 htab
->srelgot
= bfd_make_section (dynobj
, ".rela.got");
2523 || ! bfd_set_section_flags (dynobj
, htab
->srelgot
,
2524 (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
2525 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
2527 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 3))
2532 /* Create the dynamic sections, and set up shortcuts. */
2535 ppc64_elf_create_dynamic_sections (dynobj
, info
)
2537 struct bfd_link_info
*info
;
2539 struct ppc_link_hash_table
*htab
;
2541 htab
= ppc_hash_table (info
);
2542 if (!htab
->sgot
&& !create_got_section (dynobj
, info
))
2545 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
2548 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
2549 htab
->srelplt
= bfd_get_section_by_name (dynobj
, ".rela.plt");
2550 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
2552 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rela.bss");
2554 if (!htab
->splt
|| !htab
->srelplt
|| !htab
->sdynbss
2555 || (!info
->shared
&& !htab
->srelbss
))
2561 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2564 ppc64_elf_copy_indirect_symbol (dir
, ind
)
2565 struct elf_link_hash_entry
*dir
, *ind
;
2567 struct ppc_link_hash_entry
*edir
, *eind
;
2569 edir
= (struct ppc_link_hash_entry
*) dir
;
2570 eind
= (struct ppc_link_hash_entry
*) ind
;
2572 if (eind
->dyn_relocs
!= NULL
)
2574 if (edir
->dyn_relocs
!= NULL
)
2576 struct ppc_dyn_relocs
**pp
;
2577 struct ppc_dyn_relocs
*p
;
2579 if (ind
->root
.type
== bfd_link_hash_indirect
)
2582 /* Add reloc counts against the weak sym to the strong sym
2583 list. Merge any entries against the same section. */
2584 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
2586 struct ppc_dyn_relocs
*q
;
2588 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
2589 if (q
->sec
== p
->sec
)
2591 q
->pc_count
+= p
->pc_count
;
2592 q
->count
+= p
->count
;
2599 *pp
= edir
->dyn_relocs
;
2602 edir
->dyn_relocs
= eind
->dyn_relocs
;
2603 eind
->dyn_relocs
= NULL
;
2606 edir
->is_func
|= eind
->is_func
;
2607 edir
->is_func_descriptor
|= eind
->is_func_descriptor
;
2609 _bfd_elf_link_hash_copy_indirect (dir
, ind
);
2612 /* Look through the relocs for a section during the first phase, and
2613 calculate needed space in the global offset table, procedure
2614 linkage table, and dynamic reloc sections. */
2617 ppc64_elf_check_relocs (abfd
, info
, sec
, relocs
)
2619 struct bfd_link_info
*info
;
2621 const Elf_Internal_Rela
*relocs
;
2623 struct ppc_link_hash_table
*htab
;
2624 Elf_Internal_Shdr
*symtab_hdr
;
2625 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
2626 const Elf_Internal_Rela
*rel
;
2627 const Elf_Internal_Rela
*rel_end
;
2631 if (info
->relocateable
)
2634 htab
= ppc_hash_table (info
);
2635 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2637 sym_hashes
= elf_sym_hashes (abfd
);
2638 sym_hashes_end
= (sym_hashes
2639 + symtab_hdr
->sh_size
/ sizeof (Elf64_External_Sym
));
2640 if (!elf_bad_symtab (abfd
))
2641 sym_hashes_end
-= symtab_hdr
->sh_info
;
2644 is_opd
= strcmp (bfd_get_section_name (abfd
, sec
), ".opd") == 0;
2646 if (htab
->elf
.dynobj
== NULL
)
2647 htab
->elf
.dynobj
= abfd
;
2648 if (htab
->sfpr
== NULL
2649 && !create_linkage_sections (htab
->elf
.dynobj
, info
))
2652 rel_end
= relocs
+ sec
->reloc_count
;
2653 for (rel
= relocs
; rel
< rel_end
; rel
++)
2655 unsigned long r_symndx
;
2656 struct elf_link_hash_entry
*h
;
2657 enum elf_ppc_reloc_type r_type
;
2659 r_symndx
= ELF64_R_SYM (rel
->r_info
);
2660 if (r_symndx
< symtab_hdr
->sh_info
)
2663 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2665 r_type
= (enum elf_ppc_reloc_type
) ELF64_R_TYPE (rel
->r_info
);
2668 /* GOT16 relocations */
2670 case R_PPC64_GOT16_DS
:
2671 case R_PPC64_GOT16_HA
:
2672 case R_PPC64_GOT16_HI
:
2673 case R_PPC64_GOT16_LO
:
2674 case R_PPC64_GOT16_LO_DS
:
2676 /* This symbol requires a global offset table entry. */
2677 if (htab
->sgot
== NULL
2678 && !create_got_section (htab
->elf
.dynobj
, info
))
2683 h
->got
.refcount
+= 1;
2687 bfd_signed_vma
*local_got_refcounts
;
2689 /* This is a global offset table entry for a local symbol. */
2690 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2691 if (local_got_refcounts
== NULL
)
2695 size
= symtab_hdr
->sh_info
;
2696 size
*= sizeof (bfd_signed_vma
);
2697 local_got_refcounts
= ((bfd_signed_vma
*)
2698 bfd_zalloc (abfd
, size
));
2699 if (local_got_refcounts
== NULL
)
2701 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2703 local_got_refcounts
[r_symndx
] += 1;
2707 case R_PPC64_PLT16_HA
:
2708 case R_PPC64_PLT16_HI
:
2709 case R_PPC64_PLT16_LO
:
2712 /* This symbol requires a procedure linkage table entry. We
2713 actually build the entry in adjust_dynamic_symbol,
2714 because this might be a case of linking PIC code without
2715 linking in any dynamic objects, in which case we don't
2716 need to generate a procedure linkage table after all. */
2719 /* It does not make sense to have a procedure linkage
2720 table entry for a local symbol. */
2721 bfd_set_error (bfd_error_bad_value
);
2725 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
2726 h
->plt
.refcount
+= 1;
2727 ((struct ppc_link_hash_entry
*) h
)->is_func
= 1;
2730 /* The following relocations don't need to propagate the
2731 relocation if linking a shared object since they are
2732 section relative. */
2733 case R_PPC64_SECTOFF
:
2734 case R_PPC64_SECTOFF_LO
:
2735 case R_PPC64_SECTOFF_HI
:
2736 case R_PPC64_SECTOFF_HA
:
2737 case R_PPC64_SECTOFF_DS
:
2738 case R_PPC64_SECTOFF_LO_DS
:
2740 case R_PPC64_TOC16_LO
:
2741 case R_PPC64_TOC16_HI
:
2742 case R_PPC64_TOC16_HA
:
2743 case R_PPC64_TOC16_DS
:
2744 case R_PPC64_TOC16_LO_DS
:
2747 /* This relocation describes the C++ object vtable hierarchy.
2748 Reconstruct it for later use during GC. */
2749 case R_PPC64_GNU_VTINHERIT
:
2750 if (!_bfd_elf64_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2754 /* This relocation describes which C++ vtable entries are actually
2755 used. Record for later use during GC. */
2756 case R_PPC64_GNU_VTENTRY
:
2757 if (!_bfd_elf64_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2762 case R_PPC64_REL14_BRTAKEN
:
2763 case R_PPC64_REL14_BRNTAKEN
:
2764 htab
->has_14bit_branch
= 1;
2769 && h
->root
.root
.string
[0] == '.'
2770 && h
->root
.root
.string
[1] != 0)
2772 /* We may need a .plt entry if the function this reloc
2773 refers to is in a shared lib. */
2774 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
2775 h
->plt
.refcount
+= 1;
2776 ((struct ppc_link_hash_entry
*) h
)->is_func
= 1;
2780 case R_PPC64_ADDR64
:
2783 && h
->root
.root
.string
[0] == '.'
2784 && h
->root
.root
.string
[1] != 0)
2786 struct elf_link_hash_entry
*fdh
;
2788 fdh
= elf_link_hash_lookup (&htab
->elf
, h
->root
.root
.string
+ 1,
2789 false, false, false);
2792 ((struct ppc_link_hash_entry
*) fdh
)->is_func_descriptor
= 1;
2793 ((struct ppc_link_hash_entry
*) fdh
)->oh
= h
;
2794 ((struct ppc_link_hash_entry
*) h
)->is_func
= 1;
2795 ((struct ppc_link_hash_entry
*) h
)->oh
= fdh
;
2802 case R_PPC64_ADDR14
:
2803 case R_PPC64_ADDR14_BRNTAKEN
:
2804 case R_PPC64_ADDR14_BRTAKEN
:
2805 case R_PPC64_ADDR16
:
2806 case R_PPC64_ADDR16_DS
:
2807 case R_PPC64_ADDR16_HA
:
2808 case R_PPC64_ADDR16_HI
:
2809 case R_PPC64_ADDR16_HIGHER
:
2810 case R_PPC64_ADDR16_HIGHERA
:
2811 case R_PPC64_ADDR16_HIGHEST
:
2812 case R_PPC64_ADDR16_HIGHESTA
:
2813 case R_PPC64_ADDR16_LO
:
2814 case R_PPC64_ADDR16_LO_DS
:
2815 case R_PPC64_ADDR24
:
2816 case R_PPC64_ADDR30
:
2817 case R_PPC64_ADDR32
:
2818 case R_PPC64_UADDR16
:
2819 case R_PPC64_UADDR32
:
2820 case R_PPC64_UADDR64
:
2822 /* Don't propagate .opd relocs. */
2823 if (NO_OPD_RELOCS
&& is_opd
)
2826 /* If we are creating a shared library, and this is a reloc
2827 against a global symbol, or a non PC relative reloc
2828 against a local symbol, then we need to copy the reloc
2829 into the shared library. However, if we are linking with
2830 -Bsymbolic, we do not need to copy a reloc against a
2831 global symbol which is defined in an object we are
2832 including in the link (i.e., DEF_REGULAR is set). At
2833 this point we have not seen all the input files, so it is
2834 possible that DEF_REGULAR is not set now but will be set
2835 later (it is never cleared). In case of a weak definition,
2836 DEF_REGULAR may be cleared later by a strong definition in
2837 a shared library. We account for that possibility below by
2838 storing information in the relocs_copied field of the hash
2839 table entry. A similar situation occurs when creating
2840 shared libraries and symbol visibility changes render the
2843 If on the other hand, we are creating an executable, we
2844 may need to keep relocations for symbols satisfied by a
2845 dynamic library if we manage to avoid copy relocs for the
2848 && (sec
->flags
& SEC_ALLOC
) != 0
2849 && (IS_ABSOLUTE_RELOC (r_type
)
2851 && (! info
->symbolic
2852 || h
->root
.type
== bfd_link_hash_defweak
2853 || (h
->elf_link_hash_flags
2854 & ELF_LINK_HASH_DEF_REGULAR
) == 0))))
2856 && (sec
->flags
& SEC_ALLOC
) != 0
2858 && (h
->root
.type
== bfd_link_hash_defweak
2859 || (h
->elf_link_hash_flags
2860 & ELF_LINK_HASH_DEF_REGULAR
) == 0)))
2862 struct ppc_dyn_relocs
*p
;
2863 struct ppc_dyn_relocs
**head
;
2865 /* We must copy these reloc types into the output file.
2866 Create a reloc section in dynobj and make room for
2873 name
= (bfd_elf_string_from_elf_section
2875 elf_elfheader (abfd
)->e_shstrndx
,
2876 elf_section_data (sec
)->rel_hdr
.sh_name
));
2880 if (strncmp (name
, ".rela", 5) != 0
2881 || strcmp (bfd_get_section_name (abfd
, sec
),
2884 (*_bfd_error_handler
)
2885 (_("%s: bad relocation section name `%s\'"),
2886 bfd_archive_filename (abfd
), name
);
2887 bfd_set_error (bfd_error_bad_value
);
2890 dynobj
= htab
->elf
.dynobj
;
2891 sreloc
= bfd_get_section_by_name (dynobj
, name
);
2896 sreloc
= bfd_make_section (dynobj
, name
);
2897 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
2898 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
2899 if ((sec
->flags
& SEC_ALLOC
) != 0)
2900 flags
|= SEC_ALLOC
| SEC_LOAD
;
2902 || ! bfd_set_section_flags (dynobj
, sreloc
, flags
)
2903 || ! bfd_set_section_alignment (dynobj
, sreloc
, 3))
2906 elf_section_data (sec
)->sreloc
= sreloc
;
2909 /* If this is a global symbol, we count the number of
2910 relocations we need for this symbol. */
2913 head
= &((struct ppc_link_hash_entry
*) h
)->dyn_relocs
;
2917 /* Track dynamic relocs needed for local syms too.
2918 We really need local syms available to do this
2922 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
2927 head
= ((struct ppc_dyn_relocs
**)
2928 &elf_section_data (s
)->local_dynrel
);
2932 if (p
== NULL
|| p
->sec
!= sec
)
2934 p
= ((struct ppc_dyn_relocs
*)
2935 bfd_alloc (htab
->elf
.dynobj
,
2936 (bfd_size_type
) sizeof *p
));
2947 if (!IS_ABSOLUTE_RELOC (r_type
))
2960 /* Return the section that should be marked against GC for a given
2964 ppc64_elf_gc_mark_hook (abfd
, info
, rel
, h
, sym
)
2966 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2967 Elf_Internal_Rela
*rel
;
2968 struct elf_link_hash_entry
*h
;
2969 Elf_Internal_Sym
*sym
;
2973 enum elf_ppc_reloc_type r_type
;
2975 r_type
= (enum elf_ppc_reloc_type
) ELF64_R_TYPE (rel
->r_info
);
2978 case R_PPC64_GNU_VTINHERIT
:
2979 case R_PPC64_GNU_VTENTRY
:
2983 switch (h
->root
.type
)
2985 case bfd_link_hash_defined
:
2986 case bfd_link_hash_defweak
:
2987 return h
->root
.u
.def
.section
;
2989 case bfd_link_hash_common
:
2990 return h
->root
.u
.c
.p
->section
;
2999 return bfd_section_from_elf_index (abfd
, sym
->st_shndx
);
3005 /* Update the .got, .plt. and dynamic reloc reference counts for the
3006 section being removed. */
3009 ppc64_elf_gc_sweep_hook (abfd
, info
, sec
, relocs
)
3011 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
3013 const Elf_Internal_Rela
*relocs
;
3015 Elf_Internal_Shdr
*symtab_hdr
;
3016 struct elf_link_hash_entry
**sym_hashes
;
3017 bfd_signed_vma
*local_got_refcounts
;
3018 const Elf_Internal_Rela
*rel
, *relend
;
3020 elf_section_data (sec
)->local_dynrel
= NULL
;
3022 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3023 sym_hashes
= elf_sym_hashes (abfd
);
3024 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3026 relend
= relocs
+ sec
->reloc_count
;
3027 for (rel
= relocs
; rel
< relend
; rel
++)
3029 unsigned long r_symndx
;
3030 enum elf_ppc_reloc_type r_type
;
3031 struct elf_link_hash_entry
*h
;
3033 r_symndx
= ELF64_R_SYM (rel
->r_info
);
3034 r_type
= (enum elf_ppc_reloc_type
) ELF64_R_TYPE (rel
->r_info
);
3038 case R_PPC64_GOT16_DS
:
3039 case R_PPC64_GOT16_HA
:
3040 case R_PPC64_GOT16_HI
:
3041 case R_PPC64_GOT16_LO
:
3042 case R_PPC64_GOT16_LO_DS
:
3043 if (r_symndx
>= symtab_hdr
->sh_info
)
3045 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3046 if (h
->got
.refcount
> 0)
3051 if (local_got_refcounts
[r_symndx
] > 0)
3052 local_got_refcounts
[r_symndx
]--;
3056 case R_PPC64_PLT16_HA
:
3057 case R_PPC64_PLT16_HI
:
3058 case R_PPC64_PLT16_LO
:
3061 if (r_symndx
>= symtab_hdr
->sh_info
)
3063 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3064 if (h
->plt
.refcount
> 0)
3070 case R_PPC64_REL14_BRNTAKEN
:
3071 case R_PPC64_REL14_BRTAKEN
:
3073 if (r_symndx
>= symtab_hdr
->sh_info
)
3075 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3076 if (h
->plt
.refcount
> 0)
3083 if (r_symndx
>= symtab_hdr
->sh_info
)
3085 struct ppc_link_hash_entry
*eh
;
3086 struct ppc_dyn_relocs
**pp
;
3087 struct ppc_dyn_relocs
*p
;
3089 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3090 eh
= (struct ppc_link_hash_entry
*) h
;
3092 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
3104 case R_PPC64_ADDR14
:
3105 case R_PPC64_ADDR14_BRNTAKEN
:
3106 case R_PPC64_ADDR14_BRTAKEN
:
3107 case R_PPC64_ADDR16
:
3108 case R_PPC64_ADDR16_DS
:
3109 case R_PPC64_ADDR16_HA
:
3110 case R_PPC64_ADDR16_HI
:
3111 case R_PPC64_ADDR16_HIGHER
:
3112 case R_PPC64_ADDR16_HIGHERA
:
3113 case R_PPC64_ADDR16_HIGHEST
:
3114 case R_PPC64_ADDR16_HIGHESTA
:
3115 case R_PPC64_ADDR16_LO
:
3116 case R_PPC64_ADDR16_LO_DS
:
3117 case R_PPC64_ADDR24
:
3118 case R_PPC64_ADDR30
:
3119 case R_PPC64_ADDR32
:
3120 case R_PPC64_ADDR64
:
3121 case R_PPC64_UADDR16
:
3122 case R_PPC64_UADDR32
:
3123 case R_PPC64_UADDR64
:
3125 if (r_symndx
>= symtab_hdr
->sh_info
)
3127 struct ppc_link_hash_entry
*eh
;
3128 struct ppc_dyn_relocs
**pp
;
3129 struct ppc_dyn_relocs
*p
;
3131 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3132 eh
= (struct ppc_link_hash_entry
*) h
;
3134 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
3152 /* Called via elf_link_hash_traverse to transfer dynamic linking
3153 information on function code symbol entries to their corresponding
3154 function descriptor symbol entries. */
3156 func_desc_adjust (h
, inf
)
3157 struct elf_link_hash_entry
*h
;
3160 struct bfd_link_info
*info
;
3161 struct ppc_link_hash_table
*htab
;
3163 if (h
->root
.type
== bfd_link_hash_indirect
)
3166 if (h
->root
.type
== bfd_link_hash_warning
)
3167 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3169 info
= (struct bfd_link_info
*) inf
;
3170 htab
= ppc_hash_table (info
);
3172 /* If this is a function code symbol, transfer dynamic linking
3173 information to the function descriptor symbol. */
3174 if (!((struct ppc_link_hash_entry
*) h
)->is_func
)
3177 if (h
->root
.type
== bfd_link_hash_undefweak
3178 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
))
3179 htab
->have_undefweak
= true;
3181 if (h
->plt
.refcount
> 0
3182 && h
->root
.root
.string
[0] == '.'
3183 && h
->root
.root
.string
[1] != '\0')
3185 struct elf_link_hash_entry
*fdh
= ((struct ppc_link_hash_entry
*) h
)->oh
;
3186 boolean force_local
;
3188 /* Find the corresponding function descriptor symbol. Create it
3189 as undefined if necessary. */
3192 fdh
= elf_link_hash_lookup (&htab
->elf
, h
->root
.root
.string
+ 1,
3193 false, false, true);
3197 && (h
->root
.type
== bfd_link_hash_undefined
3198 || h
->root
.type
== bfd_link_hash_undefweak
))
3203 abfd
= h
->root
.u
.undef
.abfd
;
3204 newsym
= bfd_make_empty_symbol (abfd
);
3205 newsym
->name
= h
->root
.root
.string
+ 1;
3206 newsym
->section
= bfd_und_section_ptr
;
3208 newsym
->flags
= BSF_OBJECT
;
3209 if (h
->root
.type
== bfd_link_hash_undefweak
)
3210 newsym
->flags
|= BSF_WEAK
;
3212 if ( !(_bfd_generic_link_add_one_symbol
3213 (info
, abfd
, newsym
->name
, newsym
->flags
,
3214 newsym
->section
, newsym
->value
, NULL
, false, false,
3215 (struct bfd_link_hash_entry
**) &fdh
)))
3219 fdh
->elf_link_hash_flags
&= ~ELF_LINK_NON_ELF
;
3223 && (fdh
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0
3225 || (fdh
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
3226 || (fdh
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0))
3228 if (fdh
->dynindx
== -1)
3229 if (! bfd_elf64_link_record_dynamic_symbol (info
, fdh
))
3231 fdh
->elf_link_hash_flags
|= (h
->elf_link_hash_flags
3232 & (ELF_LINK_HASH_REF_REGULAR
3233 | ELF_LINK_HASH_REF_DYNAMIC
3234 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
3235 | ELF_LINK_NON_GOT_REF
));
3236 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
3238 fdh
->plt
.refcount
= h
->plt
.refcount
;
3239 fdh
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
3241 ((struct ppc_link_hash_entry
*) fdh
)->is_func_descriptor
= 1;
3242 ((struct ppc_link_hash_entry
*) fdh
)->oh
= h
;
3243 ((struct ppc_link_hash_entry
*) h
)->oh
= fdh
;
3246 /* Now that the info is on the function descriptor, clear the
3247 function code sym info. Any function code syms for which we
3248 don't have a definition in a regular file, we force local.
3249 This prevents a shared library from exporting syms that have
3250 been imported from another library. Function code syms that
3251 are really in the library we must leave global to prevent the
3252 linker dragging in a definition from a static library. */
3253 force_local
= (info
->shared
3254 && ((h
->elf_link_hash_flags
3255 & ELF_LINK_HASH_DEF_REGULAR
) == 0
3257 || (fdh
->elf_link_hash_flags
3258 & ELF_LINK_HASH_DEF_REGULAR
) == 0
3259 || (fdh
->elf_link_hash_flags
3260 & ELF_LINK_FORCED_LOCAL
) != 0));
3261 _bfd_elf_link_hash_hide_symbol (info
, h
, force_local
);
3267 #define MIN_SAVE_FPR 14
3268 #define MAX_SAVE_FPR 31
3270 /* Called near the start of bfd_elf_size_dynamic_sections. We use
3271 this hook to a) provide some gcc support functions, and b) transfer
3272 dynamic linking information gathered so far on function code symbol
3273 entries, to their corresponding function descriptor symbol entries. */
3275 ppc64_elf_func_desc_adjust (obfd
, info
)
3276 bfd
*obfd ATTRIBUTE_UNUSED
;
3277 struct bfd_link_info
*info
;
3279 struct ppc_link_hash_table
*htab
;
3280 unsigned int lowest_savef
= MAX_SAVE_FPR
+ 2;
3281 unsigned int lowest_restf
= MAX_SAVE_FPR
+ 2;
3283 struct elf_link_hash_entry
*h
;
3287 htab
= ppc_hash_table (info
);
3289 if (htab
->sfpr
== NULL
)
3290 /* We don't have any relocs. */
3293 /* First provide any missing ._savef* and ._restf* functions. */
3294 memcpy (sym
, "._savef14", 10);
3295 for (i
= MIN_SAVE_FPR
; i
<= MAX_SAVE_FPR
; i
++)
3297 sym
[7] = i
/ 10 + '0';
3298 sym
[8] = i
% 10 + '0';
3299 h
= elf_link_hash_lookup (&htab
->elf
, sym
, false, false, true);
3301 && h
->root
.type
== bfd_link_hash_undefined
)
3303 if (lowest_savef
> i
)
3305 h
->root
.type
= bfd_link_hash_defined
;
3306 h
->root
.u
.def
.section
= htab
->sfpr
;
3307 h
->root
.u
.def
.value
= (i
- lowest_savef
) * 4;
3309 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3310 _bfd_elf_link_hash_hide_symbol (info
, h
, info
->shared
);
3314 memcpy (sym
, "._restf14", 10);
3315 for (i
= MIN_SAVE_FPR
; i
<= MAX_SAVE_FPR
; i
++)
3317 sym
[7] = i
/ 10 + '0';
3318 sym
[8] = i
% 10 + '0';
3319 h
= elf_link_hash_lookup (&htab
->elf
, sym
, false, false, true);
3321 && h
->root
.type
== bfd_link_hash_undefined
)
3323 if (lowest_restf
> i
)
3325 h
->root
.type
= bfd_link_hash_defined
;
3326 h
->root
.u
.def
.section
= htab
->sfpr
;
3327 h
->root
.u
.def
.value
= ((MAX_SAVE_FPR
+ 2 - lowest_savef
) * 4
3328 + (i
- lowest_restf
) * 4);
3330 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3331 _bfd_elf_link_hash_hide_symbol (info
, h
, info
->shared
);
3335 elf_link_hash_traverse (&htab
->elf
, func_desc_adjust
, (PTR
) info
);
3337 htab
->sfpr
->_raw_size
= ((MAX_SAVE_FPR
+ 2 - lowest_savef
) * 4
3338 + (MAX_SAVE_FPR
+ 2 - lowest_restf
) * 4);
3340 if (htab
->sfpr
->_raw_size
== 0)
3342 if (!htab
->have_undefweak
)
3344 _bfd_strip_section_from_output (info
, htab
->sfpr
);
3348 htab
->sfpr
->_raw_size
= 4;
3351 p
= (bfd_byte
*) bfd_alloc (htab
->elf
.dynobj
, htab
->sfpr
->_raw_size
);
3354 htab
->sfpr
->contents
= p
;
3356 for (i
= lowest_savef
; i
<= MAX_SAVE_FPR
; i
++)
3358 unsigned int fpr
= i
<< 21;
3359 unsigned int stackoff
= (1 << 16) - (MAX_SAVE_FPR
+ 1 - i
) * 8;
3360 bfd_put_32 (htab
->elf
.dynobj
, STFD_FR0_0R1
+ fpr
+ stackoff
, p
);
3363 if (lowest_savef
<= MAX_SAVE_FPR
)
3365 bfd_put_32 (htab
->elf
.dynobj
, BLR
, p
);
3369 for (i
= lowest_restf
; i
<= MAX_SAVE_FPR
; i
++)
3371 unsigned int fpr
= i
<< 21;
3372 unsigned int stackoff
= (1 << 16) - (MAX_SAVE_FPR
+ 1 - i
) * 8;
3373 bfd_put_32 (htab
->elf
.dynobj
, LFD_FR0_0R1
+ fpr
+ stackoff
, p
);
3376 if (lowest_restf
<= MAX_SAVE_FPR
3377 || htab
->sfpr
->_raw_size
== 4)
3379 bfd_put_32 (htab
->elf
.dynobj
, BLR
, p
);
3385 /* Adjust a symbol defined by a dynamic object and referenced by a
3386 regular object. The current definition is in some section of the
3387 dynamic object, but we're not including those sections. We have to
3388 change the definition to something the rest of the link can
3392 ppc64_elf_adjust_dynamic_symbol (info
, h
)
3393 struct bfd_link_info
*info
;
3394 struct elf_link_hash_entry
*h
;
3396 struct ppc_link_hash_table
*htab
;
3397 struct ppc_link_hash_entry
* eh
;
3398 struct ppc_dyn_relocs
*p
;
3400 unsigned int power_of_two
;
3402 htab
= ppc_hash_table (info
);
3404 /* Deal with function syms. */
3405 if (h
->type
== STT_FUNC
3406 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0)
3408 /* Clear procedure linkage table information for any symbol that
3409 won't need a .plt entry. */
3410 if (!((struct ppc_link_hash_entry
*) h
)->is_func_descriptor
3411 || h
->plt
.refcount
<= 0
3412 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0
3414 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
3415 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) == 0))
3417 h
->plt
.offset
= (bfd_vma
) -1;
3418 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
3423 h
->plt
.offset
= (bfd_vma
) -1;
3425 /* If this is a weak symbol, and there is a real definition, the
3426 processor independent code will have arranged for us to see the
3427 real definition first, and we can just use the same value. */
3428 if (h
->weakdef
!= NULL
)
3430 BFD_ASSERT (h
->weakdef
->root
.type
== bfd_link_hash_defined
3431 || h
->weakdef
->root
.type
== bfd_link_hash_defweak
);
3432 h
->root
.u
.def
.section
= h
->weakdef
->root
.u
.def
.section
;
3433 h
->root
.u
.def
.value
= h
->weakdef
->root
.u
.def
.value
;
3437 /* This is a reference to a symbol defined by a dynamic object which
3438 is not a function. */
3440 /* If we are creating a shared library, we must presume that the
3441 only references to the symbol are via the global offset table.
3442 For such cases we need not do anything here; the relocations will
3443 be handled correctly by relocate_section. */
3447 /* If there are no references to this symbol that do not use the
3448 GOT, we don't need to generate a copy reloc. */
3449 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0)
3452 eh
= (struct ppc_link_hash_entry
*) h
;
3453 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3455 s
= p
->sec
->output_section
;
3456 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
3460 /* If we didn't find any dynamic relocs in read-only sections, then
3461 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
3464 h
->elf_link_hash_flags
&= ~ELF_LINK_NON_GOT_REF
;
3468 /* We must allocate the symbol in our .dynbss section, which will
3469 become part of the .bss section of the executable. There will be
3470 an entry for this symbol in the .dynsym section. The dynamic
3471 object will contain position independent code, so all references
3472 from the dynamic object to this symbol will go through the global
3473 offset table. The dynamic linker will use the .dynsym entry to
3474 determine the address it must put in the global offset table, so
3475 both the dynamic object and the regular object will refer to the
3476 same memory location for the variable. */
3478 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
3479 copy the initial value out of the dynamic object and into the
3480 runtime process image. We need to remember the offset into the
3481 .rela.bss section we are going to use. */
3482 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
3484 htab
->srelbss
->_raw_size
+= sizeof (Elf64_External_Rela
);
3485 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_COPY
;
3488 /* We need to figure out the alignment required for this symbol. I
3489 have no idea how ELF linkers handle this. */
3490 power_of_two
= bfd_log2 (h
->size
);
3491 if (power_of_two
> 4)
3494 /* Apply the required alignment. */
3496 s
->_raw_size
= BFD_ALIGN (s
->_raw_size
, (bfd_size_type
) (1 << power_of_two
));
3497 if (power_of_two
> bfd_get_section_alignment (htab
->elf
.dynobj
, s
))
3499 if (! bfd_set_section_alignment (htab
->elf
.dynobj
, s
, power_of_two
))
3503 /* Define the symbol as being at this point in the section. */
3504 h
->root
.u
.def
.section
= s
;
3505 h
->root
.u
.def
.value
= s
->_raw_size
;
3507 /* Increment the section size to make room for the symbol. */
3508 s
->_raw_size
+= h
->size
;
3513 /* If given a function descriptor symbol, hide both the function code
3514 sym and the descriptor. */
3516 ppc64_elf_hide_symbol (info
, h
, force_local
)
3517 struct bfd_link_info
*info
;
3518 struct elf_link_hash_entry
*h
;
3519 boolean force_local
;
3521 _bfd_elf_link_hash_hide_symbol (info
, h
, force_local
);
3523 if (((struct ppc_link_hash_entry
*) h
)->is_func_descriptor
)
3525 struct elf_link_hash_entry
*fh
= ((struct ppc_link_hash_entry
*) h
)->oh
;
3530 struct ppc_link_hash_table
*htab
;
3533 /* We aren't supposed to use alloca in BFD because on
3534 systems which do not have alloca the version in libiberty
3535 calls xmalloc, which might cause the program to crash
3536 when it runs out of memory. This function doesn't have a
3537 return status, so there's no way to gracefully return an
3538 error. So cheat. We know that string[-1] can be safely
3539 dereferenced; It's either a string in an ELF string
3540 table, or allocated in an objalloc structure. */
3542 p
= h
->root
.root
.string
- 1;
3545 htab
= ppc_hash_table (info
);
3546 fh
= elf_link_hash_lookup (&htab
->elf
, p
, false, false, false);
3549 /* Unfortunately, if it so happens that the string we were
3550 looking for was allocated immediately before this string,
3551 then we overwrote the string terminator. That's the only
3552 reason the lookup should fail. */
3555 q
= h
->root
.root
.string
+ strlen (h
->root
.root
.string
);
3556 while (q
>= h
->root
.root
.string
&& *q
== *p
)
3558 if (q
< h
->root
.root
.string
&& *p
== '.')
3559 fh
= elf_link_hash_lookup (&htab
->elf
, p
, false, false, false);
3563 ((struct ppc_link_hash_entry
*) h
)->oh
= fh
;
3564 ((struct ppc_link_hash_entry
*) fh
)->oh
= h
;
3568 _bfd_elf_link_hash_hide_symbol (info
, fh
, force_local
);
3572 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
3573 will be called from elflink.h. If elflink.h doesn't call our
3574 finish_dynamic_symbol routine, we'll need to do something about
3575 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
3576 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
3578 && ((INFO)->shared \
3579 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
3580 && ((H)->dynindx != -1 \
3581 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
3583 /* Allocate space in .plt, .got and associated reloc sections for
3587 allocate_dynrelocs (h
, inf
)
3588 struct elf_link_hash_entry
*h
;
3591 struct bfd_link_info
*info
;
3592 struct ppc_link_hash_table
*htab
;
3594 struct ppc_link_hash_entry
*eh
;
3595 struct ppc_dyn_relocs
*p
;
3597 if (h
->root
.type
== bfd_link_hash_indirect
)
3600 if (h
->root
.type
== bfd_link_hash_warning
)
3601 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3603 info
= (struct bfd_link_info
*) inf
;
3604 htab
= ppc_hash_table (info
);
3606 if (htab
->elf
.dynamic_sections_created
3607 && h
->plt
.refcount
> 0
3608 && h
->dynindx
!= -1)
3610 BFD_ASSERT (((struct ppc_link_hash_entry
*) h
)->is_func_descriptor
);
3612 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info
, h
))
3614 /* If this is the first .plt entry, make room for the special
3617 if (s
->_raw_size
== 0)
3618 s
->_raw_size
+= PLT_INITIAL_ENTRY_SIZE
;
3620 h
->plt
.offset
= s
->_raw_size
;
3622 /* Make room for this entry. */
3623 s
->_raw_size
+= PLT_ENTRY_SIZE
;
3625 /* Make room for the .glink code. */
3627 if (s
->_raw_size
== 0)
3628 s
->_raw_size
+= GLINK_CALL_STUB_SIZE
;
3629 /* We need bigger stubs past index 32767. */
3630 if (s
->_raw_size
>= GLINK_CALL_STUB_SIZE
+ 32768*2*4)
3632 s
->_raw_size
+= 2*4;
3634 /* We also need to make an entry in the .rela.plt section. */
3636 s
->_raw_size
+= sizeof (Elf64_External_Rela
);
3640 h
->plt
.offset
= (bfd_vma
) -1;
3641 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
3646 h
->plt
.offset
= (bfd_vma
) -1;
3647 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
3650 if (h
->got
.refcount
> 0)
3654 /* Make sure this symbol is output as a dynamic symbol.
3655 Undefined weak syms won't yet be marked as dynamic. */
3656 if (h
->dynindx
== -1
3657 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
3659 if (! bfd_elf64_link_record_dynamic_symbol (info
, h
))
3664 h
->got
.offset
= s
->_raw_size
;
3666 dyn
= htab
->elf
.dynamic_sections_created
;
3667 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
, h
))
3668 htab
->srelgot
->_raw_size
+= sizeof (Elf64_External_Rela
);
3671 h
->got
.offset
= (bfd_vma
) -1;
3673 eh
= (struct ppc_link_hash_entry
*) h
;
3674 if (eh
->dyn_relocs
== NULL
)
3677 /* In the shared -Bsymbolic case, discard space allocated for
3678 dynamic pc-relative relocs against symbols which turn out to be
3679 defined in regular objects. For the normal shared case, discard
3680 space for relocs that have become local due to symbol visibility
3685 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0
3686 && ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0
3689 struct ppc_dyn_relocs
**pp
;
3691 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
3693 p
->count
-= p
->pc_count
;
3704 /* For the non-shared case, discard space for relocs against
3705 symbols which turn out to need copy relocs or are not
3708 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0
3709 && (((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
3710 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
3711 || (htab
->elf
.dynamic_sections_created
3712 && (h
->root
.type
== bfd_link_hash_undefweak
3713 || h
->root
.type
== bfd_link_hash_undefined
))))
3715 /* Make sure this symbol is output as a dynamic symbol.
3716 Undefined weak syms won't yet be marked as dynamic. */
3717 if (h
->dynindx
== -1
3718 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
3720 if (! bfd_elf64_link_record_dynamic_symbol (info
, h
))
3724 /* If that succeeded, we know we'll be keeping all the
3726 if (h
->dynindx
!= -1)
3730 eh
->dyn_relocs
= NULL
;
3735 /* Finally, allocate space. */
3736 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3738 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
3739 sreloc
->_raw_size
+= p
->count
* sizeof (Elf64_External_Rela
);
3745 /* Find any dynamic relocs that apply to read-only sections. */
3748 readonly_dynrelocs (h
, inf
)
3749 struct elf_link_hash_entry
*h
;
3752 struct ppc_link_hash_entry
*eh
;
3753 struct ppc_dyn_relocs
*p
;
3755 if (h
->root
.type
== bfd_link_hash_warning
)
3756 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3758 eh
= (struct ppc_link_hash_entry
*) h
;
3759 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3761 asection
*s
= p
->sec
->output_section
;
3763 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
3765 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
3767 info
->flags
|= DF_TEXTREL
;
3769 /* Not an error, just cut short the traversal. */
3776 /* Set the sizes of the dynamic sections. */
3779 ppc64_elf_size_dynamic_sections (output_bfd
, info
)
3780 bfd
*output_bfd ATTRIBUTE_UNUSED
;
3781 struct bfd_link_info
*info
;
3783 struct ppc_link_hash_table
*htab
;
3789 htab
= ppc_hash_table (info
);
3790 dynobj
= htab
->elf
.dynobj
;
3794 if (htab
->elf
.dynamic_sections_created
)
3796 /* Set the contents of the .interp section to the interpreter. */
3799 s
= bfd_get_section_by_name (dynobj
, ".interp");
3802 s
->_raw_size
= sizeof ELF_DYNAMIC_INTERPRETER
;
3803 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
3807 /* Set up .got offsets for local syms, and space for local dynamic
3809 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
3811 bfd_signed_vma
*local_got
;
3812 bfd_signed_vma
*end_local_got
;
3813 bfd_size_type locsymcount
;
3814 Elf_Internal_Shdr
*symtab_hdr
;
3817 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
3820 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3822 struct ppc_dyn_relocs
*p
;
3824 for (p
= *((struct ppc_dyn_relocs
**)
3825 &elf_section_data (s
)->local_dynrel
);
3829 if (!bfd_is_abs_section (p
->sec
)
3830 && bfd_is_abs_section (p
->sec
->output_section
))
3832 /* Input section has been discarded, either because
3833 it is a copy of a linkonce section or due to
3834 linker script /DISCARD/, so we'll be discarding
3837 else if (p
->count
!= 0)
3839 srel
= elf_section_data (p
->sec
)->sreloc
;
3840 srel
->_raw_size
+= p
->count
* sizeof (Elf64_External_Rela
);
3841 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
3842 info
->flags
|= DF_TEXTREL
;
3847 local_got
= elf_local_got_refcounts (ibfd
);
3851 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
3852 locsymcount
= symtab_hdr
->sh_info
;
3853 end_local_got
= local_got
+ locsymcount
;
3855 srel
= htab
->srelgot
;
3856 for (; local_got
< end_local_got
; ++local_got
)
3860 *local_got
= s
->_raw_size
;
3863 srel
->_raw_size
+= sizeof (Elf64_External_Rela
);
3866 *local_got
= (bfd_vma
) -1;
3870 /* Allocate global sym .plt and .got entries, and space for global
3871 sym dynamic relocs. */
3872 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, (PTR
) info
);
3874 /* We now have determined the sizes of the various dynamic sections.
3875 Allocate memory for them. */
3877 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3879 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3882 if (s
== htab
->sbrlt
|| s
== htab
->srelbrlt
)
3883 /* These haven't been allocated yet; don't strip. */
3885 else if (s
== htab
->splt
3887 || s
== htab
->sglink
)
3889 /* Strip this section if we don't need it; see the
3892 else if (strncmp (bfd_get_section_name (dynobj
, s
), ".rela", 5) == 0)
3894 if (s
->_raw_size
== 0)
3896 /* If we don't need this section, strip it from the
3897 output file. This is mostly to handle .rela.bss and
3898 .rela.plt. We must create both sections in
3899 create_dynamic_sections, because they must be created
3900 before the linker maps input sections to output
3901 sections. The linker does that before
3902 adjust_dynamic_symbol is called, and it is that
3903 function which decides whether anything needs to go
3904 into these sections. */
3908 if (s
!= htab
->srelplt
)
3911 /* We use the reloc_count field as a counter if we need
3912 to copy relocs into the output file. */
3918 /* It's not one of our sections, so don't allocate space. */
3922 if (s
->_raw_size
== 0)
3924 _bfd_strip_section_from_output (info
, s
);
3928 /* .plt is in the bss section. We don't initialise it. */
3929 if ((s
->flags
& SEC_LOAD
) == 0)
3932 /* Allocate memory for the section contents. We use bfd_zalloc
3933 here in case unused entries are not reclaimed before the
3934 section's contents are written out. This should not happen,
3935 but this way if it does, we get a R_PPC64_NONE reloc instead
3937 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->_raw_size
);
3938 if (s
->contents
== NULL
)
3942 if (htab
->elf
.dynamic_sections_created
)
3944 /* Add some entries to the .dynamic section. We fill in the
3945 values later, in ppc64_elf_finish_dynamic_sections, but we
3946 must add the entries now so that we get the correct size for
3947 the .dynamic section. The DT_DEBUG entry is filled in by the
3948 dynamic linker and used by the debugger. */
3949 #define add_dynamic_entry(TAG, VAL) \
3950 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
3954 if (!add_dynamic_entry (DT_DEBUG
, 0))
3958 if (htab
->splt
!= NULL
&& htab
->splt
->_raw_size
!= 0)
3960 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3961 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3962 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3963 || !add_dynamic_entry (DT_JMPREL
, 0)
3964 || !add_dynamic_entry (DT_PPC64_GLINK
, 0))
3970 if (!add_dynamic_entry (DT_PPC64_OPD
, 0)
3971 || !add_dynamic_entry (DT_PPC64_OPDSZ
, 0))
3977 if (!add_dynamic_entry (DT_RELA
, 0)
3978 || !add_dynamic_entry (DT_RELASZ
, 0)
3979 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
3982 /* If any dynamic relocs apply to a read-only section,
3983 then we need a DT_TEXTREL entry. */
3984 if ((info
->flags
& DF_TEXTREL
) == 0)
3985 elf_link_hash_traverse (&htab
->elf
, readonly_dynrelocs
,
3988 if ((info
->flags
& DF_TEXTREL
) != 0)
3990 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3995 #undef add_dynamic_entry
4000 /* Determine the type of stub needed, if any, for a call. */
4002 static INLINE
enum ppc_stub_type
4003 ppc_type_of_stub (input_sec
, rel
, hash
, destination
)
4004 asection
*input_sec
;
4005 const Elf_Internal_Rela
*rel
;
4006 struct ppc_link_hash_entry
**hash
;
4007 bfd_vma destination
;
4009 struct ppc_link_hash_entry
*h
= *hash
;
4011 bfd_vma branch_offset
;
4012 bfd_vma max_branch_offset
;
4013 unsigned int r_type
;
4018 && h
->oh
->plt
.offset
!= (bfd_vma
) -1
4019 && h
->oh
->dynindx
!= -1)
4021 *hash
= (struct ppc_link_hash_entry
*) h
->oh
;
4022 return ppc_stub_plt_call
;
4025 if (h
->elf
.root
.type
== bfd_link_hash_undefweak
4026 || h
->elf
.root
.type
== bfd_link_hash_undefined
)
4027 return ppc_stub_none
;
4030 /* Determine where the call point is. */
4031 location
= (input_sec
->output_offset
4032 + input_sec
->output_section
->vma
4035 branch_offset
= destination
- location
;
4036 r_type
= ELF64_R_TYPE (rel
->r_info
);
4038 /* Determine if a long branch stub is needed. */
4039 max_branch_offset
= 1 << 25;
4040 if (r_type
!= (unsigned int) R_PPC64_REL24
)
4041 max_branch_offset
= 1 << 15;
4043 if (branch_offset
+ max_branch_offset
>= 2 * max_branch_offset
)
4044 /* We need a stub. Figure out whether a long_branch or plt_branch
4046 return ppc_stub_long_branch
;
4048 return ppc_stub_none
;
4051 /* Build a .plt call stub. */
4054 build_plt_stub (obfd
, p
, offset
, glink
)
4060 #define PPC_LO(v) ((v) & 0xffff)
4061 #define PPC_HI(v) (((v) >> 16) & 0xffff)
4062 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
4065 bfd_put_32 (obfd
, LD_R2_40R1
, p
), p
+= 4;
4066 bfd_put_32 (obfd
, ADDIS_R12_R2
| PPC_HA (offset
), p
), p
+= 4;
4068 bfd_put_32 (obfd
, STD_R2_40R1
, p
), p
+= 4;
4069 bfd_put_32 (obfd
, LD_R11_0R12
| PPC_LO (offset
), p
), p
+= 4;
4070 if (PPC_HA (offset
+ 8) != PPC_HA (offset
))
4071 bfd_put_32 (obfd
, ADDIS_R12_R12_1
, p
), p
+= 4;
4073 bfd_put_32 (obfd
, LD_R2_0R12
| PPC_LO (offset
), p
), p
+= 4;
4074 if (PPC_HA (offset
+ 8) != PPC_HA (offset
))
4075 bfd_put_32 (obfd
, ADDIS_R12_R12_1
, p
), p
+= 4;
4077 bfd_put_32 (obfd
, MTCTR_R11
, p
), p
+= 4;
4078 bfd_put_32 (obfd
, LD_R11_0R12
| PPC_LO (offset
), p
), p
+= 4;
4079 bfd_put_32 (obfd
, BCTR
, p
), p
+= 4;
4084 ppc_build_one_stub (gen_entry
, in_arg
)
4085 struct bfd_hash_entry
*gen_entry
;
4088 struct ppc_stub_hash_entry
*stub_entry
;
4089 struct ppc_branch_hash_entry
*br_entry
;
4090 struct bfd_link_info
*info
;
4091 struct ppc_link_hash_table
*htab
;
4100 /* Massage our args to the form they really have. */
4101 stub_entry
= (struct ppc_stub_hash_entry
*) gen_entry
;
4102 info
= (struct bfd_link_info
*) in_arg
;
4104 htab
= ppc_hash_table (info
);
4105 stub_sec
= stub_entry
->stub_sec
;
4107 /* Make a note of the offset within the stubs for this entry. */
4108 stub_entry
->stub_offset
= stub_sec
->_cooked_size
;
4109 loc
= stub_sec
->contents
+ stub_entry
->stub_offset
;
4111 stub_bfd
= stub_sec
->owner
;
4113 switch (stub_entry
->stub_type
)
4115 case ppc_stub_long_branch
:
4116 /* Branches are relative. This is where we are going to. */
4117 off
= (stub_entry
->target_value
4118 + stub_entry
->target_section
->output_offset
4119 + stub_entry
->target_section
->output_section
->vma
);
4121 /* And this is where we are coming from. */
4122 off
-= (stub_entry
->stub_offset
4123 + stub_sec
->output_offset
4124 + stub_sec
->output_section
->vma
);
4126 BFD_ASSERT (off
+ (1 << 25) < (bfd_vma
) (1 << 26));
4128 bfd_put_32 (stub_bfd
, (bfd_vma
) B_DOT
| (off
& 0x3fffffc), loc
);
4132 case ppc_stub_plt_branch
:
4133 br_entry
= ppc_branch_hash_lookup (&htab
->branch_hash_table
,
4134 stub_entry
->root
.string
+ 9,
4136 if (br_entry
== NULL
)
4138 (*_bfd_error_handler
) (_("can't find branch stub `%s'"),
4139 stub_entry
->root
.string
+ 9);
4140 htab
->stub_error
= true;
4144 off
= (stub_entry
->target_value
4145 + stub_entry
->target_section
->output_offset
4146 + stub_entry
->target_section
->output_section
->vma
);
4148 bfd_put_64 (htab
->sbrlt
->owner
, off
,
4149 htab
->sbrlt
->contents
+ br_entry
->offset
);
4153 /* Create a reloc for the branch lookup table entry. */
4154 Elf_Internal_Rela rela
;
4155 Elf64_External_Rela
*r
;
4157 rela
.r_offset
= (br_entry
->offset
4158 + htab
->sbrlt
->output_offset
4159 + htab
->sbrlt
->output_section
->vma
);
4160 rela
.r_info
= ELF64_R_INFO (0, R_PPC64_RELATIVE
);
4161 rela
.r_addend
= off
;
4163 r
= (Elf64_External_Rela
*) htab
->srelbrlt
->contents
;
4164 r
+= htab
->srelbrlt
->reloc_count
++;
4165 bfd_elf64_swap_reloca_out (htab
->srelbrlt
->owner
, &rela
, r
);
4168 off
= (br_entry
->offset
4169 + htab
->sbrlt
->output_offset
4170 + htab
->sbrlt
->output_section
->vma
4171 - elf_gp (htab
->sbrlt
->output_section
->owner
)
4174 if (off
+ 0x80000000 > 0xffffffff || (off
& 7) != 0)
4176 (*_bfd_error_handler
)
4177 (_("linkage table error against `%s'"),
4178 stub_entry
->root
.string
);
4179 bfd_set_error (bfd_error_bad_value
);
4180 htab
->stub_error
= true;
4185 bfd_put_32 (stub_bfd
, (bfd_vma
) ADDIS_R12_R2
| PPC_HA (indx
), loc
);
4186 bfd_put_32 (stub_bfd
, (bfd_vma
) LD_R11_0R12
| PPC_LO (indx
), loc
+ 4);
4187 bfd_put_32 (stub_bfd
, (bfd_vma
) MTCTR_R11
, loc
+ 8);
4188 bfd_put_32 (stub_bfd
, (bfd_vma
) BCTR
, loc
+ 12);
4192 case ppc_stub_plt_call
:
4193 /* Build the .glink lazy link call stub. */
4194 p
= htab
->sglink
->contents
+ htab
->sglink
->_cooked_size
;
4195 indx
= htab
->sglink
->reloc_count
;
4198 bfd_put_32 (htab
->sglink
->owner
, LI_R0_0
| indx
, p
);
4203 bfd_put_32 (htab
->sglink
->owner
, LIS_R0_0
| PPC_HI (indx
), p
);
4205 bfd_put_32 (htab
->sglink
->owner
, ORI_R0_R0_0
| PPC_LO (indx
), p
);
4208 bfd_put_32 (htab
->sglink
->owner
,
4209 B_DOT
| ((htab
->sglink
->contents
- p
) & 0x3fffffc), p
);
4211 htab
->sglink
->_cooked_size
= p
- htab
->sglink
->contents
;
4212 htab
->sglink
->reloc_count
+= 1;
4214 /* Do the best we can for shared libraries built without
4215 exporting ".foo" for each "foo". This can happen when symbol
4216 versioning scripts strip all bar a subset of symbols. */
4217 if (stub_entry
->h
->oh
->root
.type
!= bfd_link_hash_defined
4218 && stub_entry
->h
->oh
->root
.type
!= bfd_link_hash_defweak
)
4220 /* Point the symbol at the stub. There may be multiple stubs,
4221 we don't really care; The main thing is to make this sym
4222 defined somewhere. */
4223 stub_entry
->h
->oh
->root
.type
= bfd_link_hash_defined
;
4224 stub_entry
->h
->oh
->root
.u
.def
.section
= stub_entry
->stub_sec
;
4225 stub_entry
->h
->oh
->root
.u
.def
.value
= stub_entry
->stub_offset
;
4228 /* Now build the stub. */
4229 off
= stub_entry
->h
->elf
.plt
.offset
;
4230 if (off
>= (bfd_vma
) -2)
4233 off
&= ~ (bfd_vma
) 1;
4234 off
+= (htab
->splt
->output_offset
4235 + htab
->splt
->output_section
->vma
4236 - elf_gp (htab
->splt
->output_section
->owner
)
4239 if (off
+ 0x80000000 > 0xffffffff || (off
& 7) != 0)
4241 (*_bfd_error_handler
)
4242 (_("linkage table error against `%s'"),
4243 stub_entry
->h
->elf
.root
.root
.string
);
4244 bfd_set_error (bfd_error_bad_value
);
4245 htab
->stub_error
= true;
4249 p
= build_plt_stub (stub_bfd
, loc
, (int) off
, 0);
4258 stub_sec
->_cooked_size
+= size
;
4262 /* As above, but don't actually build the stub. Just bump offset so
4263 we know stub section sizes, and select plt_branch stubs where
4264 long_branch stubs won't do. */
4267 ppc_size_one_stub (gen_entry
, in_arg
)
4268 struct bfd_hash_entry
*gen_entry
;
4271 struct ppc_stub_hash_entry
*stub_entry
;
4272 struct ppc_link_hash_table
*htab
;
4276 /* Massage our args to the form they really have. */
4277 stub_entry
= (struct ppc_stub_hash_entry
*) gen_entry
;
4278 htab
= (struct ppc_link_hash_table
*) in_arg
;
4280 if (stub_entry
->stub_type
== ppc_stub_plt_call
)
4282 off
= stub_entry
->h
->elf
.plt
.offset
& ~(bfd_vma
) 1;
4283 off
+= (htab
->splt
->output_offset
4284 + htab
->splt
->output_section
->vma
4285 - elf_gp (htab
->splt
->output_section
->owner
)
4289 if (PPC_HA ((int) off
+ 16) != PPC_HA ((int) off
))
4294 /* ppc_stub_long_branch or ppc_stub_plt_branch. */
4295 stub_entry
->stub_type
= ppc_stub_long_branch
;
4298 off
= (stub_entry
->target_value
4299 + stub_entry
->target_section
->output_offset
4300 + stub_entry
->target_section
->output_section
->vma
);
4301 off
-= (stub_entry
->stub_sec
->_raw_size
4302 + stub_entry
->stub_sec
->output_offset
4303 + stub_entry
->stub_sec
->output_section
->vma
);
4305 if (off
+ (1 << 25) >= (bfd_vma
) (1 << 26))
4307 struct ppc_branch_hash_entry
*br_entry
;
4309 br_entry
= ppc_branch_hash_lookup (&htab
->branch_hash_table
,
4310 stub_entry
->root
.string
+ 9,
4312 if (br_entry
== NULL
)
4314 (*_bfd_error_handler
) (_("can't build branch stub `%s'"),
4315 stub_entry
->root
.string
+ 9);
4316 htab
->stub_error
= true;
4320 if (br_entry
->iter
!= htab
->stub_iteration
)
4322 br_entry
->iter
= htab
->stub_iteration
;
4323 br_entry
->offset
= htab
->sbrlt
->_raw_size
;
4324 htab
->sbrlt
->_raw_size
+= 8;
4326 stub_entry
->stub_type
= ppc_stub_plt_branch
;
4331 stub_entry
->stub_sec
->_raw_size
+= size
;
4335 /* Set up various things so that we can make a list of input sections
4336 for each output section included in the link. Returns -1 on error,
4337 0 when no stubs will be needed, and 1 on success. */
4340 ppc64_elf_setup_section_lists (output_bfd
, info
)
4342 struct bfd_link_info
*info
;
4345 unsigned int bfd_count
;
4346 int top_id
, top_index
;
4348 asection
**input_list
, **list
;
4350 struct ppc_link_hash_table
*htab
= ppc_hash_table (info
);
4352 if (htab
->elf
.root
.creator
->flavour
!= bfd_target_elf_flavour
4353 || htab
->sbrlt
== NULL
)
4356 /* Count the number of input BFDs and find the top input section id. */
4357 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
4359 input_bfd
= input_bfd
->link_next
)
4362 for (section
= input_bfd
->sections
;
4364 section
= section
->next
)
4366 if (top_id
< section
->id
)
4367 top_id
= section
->id
;
4370 htab
->bfd_count
= bfd_count
;
4372 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
4373 htab
->stub_group
= (struct map_stub
*) bfd_zmalloc (amt
);
4374 if (htab
->stub_group
== NULL
)
4377 /* We can't use output_bfd->section_count here to find the top output
4378 section index as some sections may have been removed, and
4379 _bfd_strip_section_from_output doesn't renumber the indices. */
4380 for (section
= output_bfd
->sections
, top_index
= 0;
4382 section
= section
->next
)
4384 if (top_index
< section
->index
)
4385 top_index
= section
->index
;
4388 htab
->top_index
= top_index
;
4389 amt
= sizeof (asection
*) * (top_index
+ 1);
4390 input_list
= (asection
**) bfd_malloc (amt
);
4391 htab
->input_list
= input_list
;
4392 if (input_list
== NULL
)
4395 /* For sections we aren't interested in, mark their entries with a
4396 value we can check later. */
4397 list
= input_list
+ top_index
;
4399 *list
= bfd_abs_section_ptr
;
4400 while (list
-- != input_list
);
4402 for (section
= output_bfd
->sections
;
4404 section
= section
->next
)
4406 if ((section
->flags
& SEC_CODE
) != 0)
4407 input_list
[section
->index
] = NULL
;
4413 /* The linker repeatedly calls this function for each input section,
4414 in the order that input sections are linked into output sections.
4415 Build lists of input sections to determine groupings between which
4416 we may insert linker stubs. */
4419 ppc64_elf_next_input_section (info
, isec
)
4420 struct bfd_link_info
*info
;
4423 struct ppc_link_hash_table
*htab
= ppc_hash_table (info
);
4425 if (isec
->output_section
->index
<= htab
->top_index
)
4427 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
4428 if (*list
!= bfd_abs_section_ptr
)
4430 /* Steal the link_sec pointer for our list. */
4431 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
4432 /* This happens to make the list in reverse order,
4433 which is what we want. */
4434 PREV_SEC (isec
) = *list
;
4440 /* See whether we can group stub sections together. Grouping stub
4441 sections may result in fewer stubs. More importantly, we need to
4442 put all .init* and .fini* stubs at the beginning of the .init or
4443 .fini output sections respectively, because glibc splits the
4444 _init and _fini functions into multiple parts. Putting a stub in
4445 the middle of a function is not a good idea. */
4448 group_sections (htab
, stub_group_size
, stubs_always_before_branch
)
4449 struct ppc_link_hash_table
*htab
;
4450 bfd_size_type stub_group_size
;
4451 boolean stubs_always_before_branch
;
4453 asection
**list
= htab
->input_list
+ htab
->top_index
;
4456 asection
*tail
= *list
;
4457 if (tail
== bfd_abs_section_ptr
)
4459 while (tail
!= NULL
)
4463 bfd_size_type total
;
4466 if (tail
->_cooked_size
)
4467 total
= tail
->_cooked_size
;
4469 total
= tail
->_raw_size
;
4470 while ((prev
= PREV_SEC (curr
)) != NULL
4471 && ((total
+= curr
->output_offset
- prev
->output_offset
)
4475 /* OK, the size from the start of CURR to the end is less
4476 than stub_group_size and thus can be handled by one stub
4477 section. (or the tail section is itself larger than
4478 stub_group_size, in which case we may be toast.) We
4479 should really be keeping track of the total size of stubs
4480 added here, as stubs contribute to the final output
4481 section size. That's a little tricky, and this way will
4482 only break if stubs added make the total size more than
4483 2^25, ie. for the default stub_group_size, if stubs total
4484 more than 2834432 bytes, or over 100000 plt call stubs. */
4487 prev
= PREV_SEC (tail
);
4488 /* Set up this stub group. */
4489 htab
->stub_group
[tail
->id
].link_sec
= curr
;
4491 while (tail
!= curr
&& (tail
= prev
) != NULL
);
4493 /* But wait, there's more! Input sections up to stub_group_size
4494 bytes before the stub section can be handled by it too. */
4495 if (!stubs_always_before_branch
)
4499 && ((total
+= tail
->output_offset
- prev
->output_offset
)
4503 prev
= PREV_SEC (tail
);
4504 htab
->stub_group
[tail
->id
].link_sec
= curr
;
4510 while (list
-- != htab
->input_list
);
4511 free (htab
->input_list
);
4515 /* Read in all local syms for all input bfds. */
4518 get_local_syms (input_bfd
, htab
)
4520 struct ppc_link_hash_table
*htab
;
4522 unsigned int bfd_indx
;
4523 Elf_Internal_Sym
*local_syms
, **all_local_syms
;
4525 /* We want to read in symbol extension records only once. To do this
4526 we need to read in the local symbols in parallel and save them for
4527 later use; so hold pointers to the local symbols in an array. */
4528 bfd_size_type amt
= sizeof (Elf_Internal_Sym
*) * htab
->bfd_count
;
4529 all_local_syms
= (Elf_Internal_Sym
**) bfd_zmalloc (amt
);
4530 htab
->all_local_syms
= all_local_syms
;
4531 if (all_local_syms
== NULL
)
4534 /* Walk over all the input BFDs, swapping in local symbols.
4535 If we are creating a shared library, create hash entries for the
4539 input_bfd
= input_bfd
->link_next
, bfd_indx
++)
4541 Elf_Internal_Shdr
*symtab_hdr
;
4542 Elf_Internal_Shdr
*shndx_hdr
;
4543 Elf_Internal_Sym
*isym
;
4544 Elf64_External_Sym
*ext_syms
, *esym
, *end_sy
;
4545 Elf_External_Sym_Shndx
*shndx_buf
, *shndx
;
4546 bfd_size_type sec_size
;
4548 /* We'll need the symbol table in a second. */
4549 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4550 if (symtab_hdr
->sh_info
== 0)
4553 /* We need an array of the local symbols attached to the input bfd.
4554 Unfortunately, we're going to have to read & swap them in. */
4555 sec_size
= symtab_hdr
->sh_info
;
4556 sec_size
*= sizeof (Elf_Internal_Sym
);
4557 local_syms
= (Elf_Internal_Sym
*) bfd_malloc (sec_size
);
4558 if (local_syms
== NULL
)
4561 all_local_syms
[bfd_indx
] = local_syms
;
4562 sec_size
= symtab_hdr
->sh_info
;
4563 sec_size
*= sizeof (Elf64_External_Sym
);
4564 ext_syms
= (Elf64_External_Sym
*) bfd_malloc (sec_size
);
4565 if (ext_syms
== NULL
)
4568 if (bfd_seek (input_bfd
, symtab_hdr
->sh_offset
, SEEK_SET
) != 0
4569 || bfd_bread ((PTR
) ext_syms
, sec_size
, input_bfd
) != sec_size
)
4571 error_ret_free_ext_syms
:
4577 shndx_hdr
= &elf_tdata (input_bfd
)->symtab_shndx_hdr
;
4578 if (shndx_hdr
->sh_size
!= 0)
4580 sec_size
= symtab_hdr
->sh_info
;
4581 sec_size
*= sizeof (Elf_External_Sym_Shndx
);
4582 shndx_buf
= (Elf_External_Sym_Shndx
*) bfd_malloc (sec_size
);
4583 if (shndx_buf
== NULL
)
4584 goto error_ret_free_ext_syms
;
4586 if (bfd_seek (input_bfd
, shndx_hdr
->sh_offset
, SEEK_SET
) != 0
4587 || bfd_bread ((PTR
) shndx_buf
, sec_size
, input_bfd
) != sec_size
)
4590 goto error_ret_free_ext_syms
;
4594 /* Swap the local symbols in. */
4595 for (esym
= ext_syms
, end_sy
= esym
+ symtab_hdr
->sh_info
,
4596 isym
= local_syms
, shndx
= shndx_buf
;
4598 esym
++, isym
++, shndx
= (shndx
? shndx
+ 1 : NULL
))
4599 bfd_elf64_swap_symbol_in (input_bfd
, (const PTR
) esym
,
4600 (const PTR
) shndx
, isym
);
4602 /* Now we can free the external symbols. */
4610 /* Determine and set the size of the stub section for a final link.
4612 The basic idea here is to examine all the relocations looking for
4613 PC-relative calls to a target that is unreachable with a "bl"
4617 ppc64_elf_size_stubs (output_bfd
, stub_bfd
, info
, group_size
,
4618 add_stub_section
, layout_sections_again
)
4621 struct bfd_link_info
*info
;
4622 bfd_signed_vma group_size
;
4623 asection
* (*add_stub_section
) PARAMS ((const char *, asection
*));
4624 void (*layout_sections_again
) PARAMS ((void));
4626 bfd_size_type stub_group_size
;
4627 boolean stubs_always_before_branch
;
4628 boolean ret
= false;
4629 struct ppc_link_hash_table
*htab
= ppc_hash_table (info
);
4631 /* Stash our params away. */
4632 htab
->stub_bfd
= stub_bfd
;
4633 htab
->add_stub_section
= add_stub_section
;
4634 htab
->layout_sections_again
= layout_sections_again
;
4635 stubs_always_before_branch
= group_size
< 0;
4637 stub_group_size
= -group_size
;
4639 stub_group_size
= group_size
;
4640 if (stub_group_size
== 1)
4642 /* Default values. */
4643 stub_group_size
= 30720000;
4644 if (htab
->has_14bit_branch
)
4645 stub_group_size
= 30000;
4648 group_sections (htab
, stub_group_size
, stubs_always_before_branch
);
4650 if (! get_local_syms (info
->input_bfds
, htab
))
4652 if (htab
->all_local_syms
)
4653 goto error_ret_free_local
;
4660 unsigned int bfd_indx
;
4662 boolean stub_changed
;
4664 htab
->stub_iteration
+= 1;
4665 stub_changed
= false;
4667 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
4669 input_bfd
= input_bfd
->link_next
, bfd_indx
++)
4671 Elf_Internal_Shdr
*symtab_hdr
;
4673 Elf_Internal_Sym
*local_syms
;
4675 /* We'll need the symbol table in a second. */
4676 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4677 if (symtab_hdr
->sh_info
== 0)
4680 local_syms
= htab
->all_local_syms
[bfd_indx
];
4682 /* Walk over each section attached to the input bfd. */
4683 for (section
= input_bfd
->sections
;
4685 section
= section
->next
)
4687 Elf_Internal_Shdr
*input_rel_hdr
;
4688 Elf64_External_Rela
*external_relocs
, *erelaend
, *erela
;
4689 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
4692 /* If there aren't any relocs, then there's nothing more
4694 if ((section
->flags
& SEC_RELOC
) == 0
4695 || section
->reloc_count
== 0)
4698 /* If this section is a link-once section that will be
4699 discarded, then don't create any stubs. */
4700 if (section
->output_section
== NULL
4701 || section
->output_section
->owner
!= output_bfd
)
4704 /* Allocate space for the external relocations. */
4705 amt
= section
->reloc_count
;
4706 amt
*= sizeof (Elf64_External_Rela
);
4707 external_relocs
= (Elf64_External_Rela
*) bfd_malloc (amt
);
4708 if (external_relocs
== NULL
)
4710 goto error_ret_free_local
;
4713 /* Likewise for the internal relocations. */
4714 amt
= section
->reloc_count
;
4715 amt
*= sizeof (Elf_Internal_Rela
);
4716 internal_relocs
= (Elf_Internal_Rela
*) bfd_malloc (amt
);
4717 if (internal_relocs
== NULL
)
4719 free (external_relocs
);
4720 goto error_ret_free_local
;
4723 /* Read in the external relocs. */
4724 input_rel_hdr
= &elf_section_data (section
)->rel_hdr
;
4725 if (bfd_seek (input_bfd
, input_rel_hdr
->sh_offset
, SEEK_SET
) != 0
4726 || bfd_bread ((PTR
) external_relocs
,
4727 input_rel_hdr
->sh_size
,
4728 input_bfd
) != input_rel_hdr
->sh_size
)
4730 free (external_relocs
);
4731 error_ret_free_internal
:
4732 free (internal_relocs
);
4733 goto error_ret_free_local
;
4736 /* Swap in the relocs. */
4737 erela
= external_relocs
;
4738 erelaend
= erela
+ section
->reloc_count
;
4739 irela
= internal_relocs
;
4740 for (; erela
< erelaend
; erela
++, irela
++)
4741 bfd_elf64_swap_reloca_in (input_bfd
, erela
, irela
);
4743 /* We're done with the external relocs, free them. */
4744 free (external_relocs
);
4746 /* Now examine each relocation. */
4747 irela
= internal_relocs
;
4748 irelaend
= irela
+ section
->reloc_count
;
4749 for (; irela
< irelaend
; irela
++)
4751 unsigned int r_type
, r_indx
;
4752 enum ppc_stub_type stub_type
;
4753 struct ppc_stub_hash_entry
*stub_entry
;
4756 bfd_vma destination
;
4757 struct ppc_link_hash_entry
*hash
;
4759 const asection
*id_sec
;
4761 r_type
= ELF64_R_TYPE (irela
->r_info
);
4762 r_indx
= ELF64_R_SYM (irela
->r_info
);
4764 if (r_type
>= (unsigned int) R_PPC_max
)
4766 bfd_set_error (bfd_error_bad_value
);
4767 goto error_ret_free_internal
;
4770 /* Only look for stubs on branch instructions. */
4771 if (r_type
!= (unsigned int) R_PPC64_REL24
4772 && r_type
!= (unsigned int) R_PPC64_REL14
4773 && r_type
!= (unsigned int) R_PPC64_REL14_BRTAKEN
4774 && r_type
!= (unsigned int) R_PPC64_REL14_BRNTAKEN
)
4777 /* Now determine the call target, its name, value,
4783 if (r_indx
< symtab_hdr
->sh_info
)
4785 /* It's a local symbol. */
4786 Elf_Internal_Sym
*sym
;
4787 Elf_Internal_Shdr
*hdr
;
4789 sym
= local_syms
+ r_indx
;
4790 hdr
= elf_elfsections (input_bfd
)[sym
->st_shndx
];
4791 sym_sec
= hdr
->bfd_section
;
4792 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
4793 sym_value
= sym
->st_value
;
4794 destination
= (sym_value
+ irela
->r_addend
4795 + sym_sec
->output_offset
4796 + sym_sec
->output_section
->vma
);
4800 /* It's an external symbol. */
4803 e_indx
= r_indx
- symtab_hdr
->sh_info
;
4804 hash
= ((struct ppc_link_hash_entry
*)
4805 elf_sym_hashes (input_bfd
)[e_indx
]);
4807 while (hash
->elf
.root
.type
== bfd_link_hash_indirect
4808 || hash
->elf
.root
.type
== bfd_link_hash_warning
)
4809 hash
= ((struct ppc_link_hash_entry
*)
4810 hash
->elf
.root
.u
.i
.link
);
4812 if (hash
->elf
.root
.type
== bfd_link_hash_defined
4813 || hash
->elf
.root
.type
== bfd_link_hash_defweak
)
4815 sym_sec
= hash
->elf
.root
.u
.def
.section
;
4816 sym_value
= hash
->elf
.root
.u
.def
.value
;
4817 if (sym_sec
->output_section
!= NULL
)
4818 destination
= (sym_value
+ irela
->r_addend
4819 + sym_sec
->output_offset
4820 + sym_sec
->output_section
->vma
);
4822 else if (hash
->elf
.root
.type
== bfd_link_hash_undefweak
)
4824 else if (hash
->elf
.root
.type
== bfd_link_hash_undefined
)
4828 bfd_set_error (bfd_error_bad_value
);
4829 goto error_ret_free_internal
;
4833 /* Determine what (if any) linker stub is needed. */
4834 stub_type
= ppc_type_of_stub (section
, irela
, &hash
,
4836 if (stub_type
== ppc_stub_none
)
4839 /* Support for grouping stub sections. */
4840 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4842 /* Get the name of this stub. */
4843 stub_name
= ppc_stub_name (id_sec
, sym_sec
, hash
, irela
);
4845 goto error_ret_free_internal
;
4847 stub_entry
= ppc_stub_hash_lookup (&htab
->stub_hash_table
,
4848 stub_name
, false, false);
4849 if (stub_entry
!= NULL
)
4851 /* The proper stub has already been created. */
4856 stub_entry
= ppc_add_stub (stub_name
, section
, htab
);
4857 if (stub_entry
== NULL
)
4860 goto error_ret_free_local
;
4863 stub_entry
->target_value
= sym_value
;
4864 stub_entry
->target_section
= sym_sec
;
4865 stub_entry
->stub_type
= stub_type
;
4866 stub_entry
->h
= hash
;
4867 stub_changed
= true;
4870 /* We're done with the internal relocs, free them. */
4871 free (internal_relocs
);
4878 /* OK, we've added some stubs. Find out the new size of the
4880 for (stub_sec
= htab
->stub_bfd
->sections
;
4882 stub_sec
= stub_sec
->next
)
4884 stub_sec
->_raw_size
= 0;
4885 stub_sec
->_cooked_size
= 0;
4887 htab
->sbrlt
->_raw_size
= 0;
4888 htab
->sbrlt
->_cooked_size
= 0;
4890 bfd_hash_traverse (&htab
->stub_hash_table
, ppc_size_one_stub
, htab
);
4892 /* Ask the linker to do its stuff. */
4893 (*htab
->layout_sections_again
) ();
4896 /* It would be nice to strip .branch_lt from the output if the
4897 section is empty, but it's too late. If we strip sections here,
4898 the dynamic symbol table is corrupted since the section symbol
4899 for the stripped section isn't written. */
4903 error_ret_free_local
:
4904 while (htab
->bfd_count
-- > 0)
4905 if (htab
->all_local_syms
[htab
->bfd_count
])
4906 free (htab
->all_local_syms
[htab
->bfd_count
]);
4907 free (htab
->all_local_syms
);
4912 /* Called after we have determined section placement. If sections
4913 move, we'll be called again. Provide a value for TOCstart. */
4916 ppc64_elf_toc (obfd
)
4922 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
4923 order. The TOC starts where the first of these sections starts. */
4924 s
= bfd_get_section_by_name (obfd
, ".got");
4926 s
= bfd_get_section_by_name (obfd
, ".toc");
4928 s
= bfd_get_section_by_name (obfd
, ".tocbss");
4930 s
= bfd_get_section_by_name (obfd
, ".plt");
4933 /* This may happen for
4934 o references to TOC base (SYM@toc / TOC[tc0]) without a
4937 o --gc-sections and empty TOC sections
4939 FIXME: Warn user? */
4941 /* Look for a likely section. We probably won't even be
4943 for (s
= obfd
->sections
; s
!= NULL
; s
= s
->next
)
4944 if ((s
->flags
& (SEC_ALLOC
| SEC_SMALL_DATA
| SEC_READONLY
))
4945 == (SEC_ALLOC
| SEC_SMALL_DATA
))
4948 for (s
= obfd
->sections
; s
!= NULL
; s
= s
->next
)
4949 if ((s
->flags
& (SEC_ALLOC
| SEC_SMALL_DATA
))
4950 == (SEC_ALLOC
| SEC_SMALL_DATA
))
4953 for (s
= obfd
->sections
; s
!= NULL
; s
= s
->next
)
4954 if ((s
->flags
& (SEC_ALLOC
| SEC_READONLY
)) == SEC_ALLOC
)
4957 for (s
= obfd
->sections
; s
!= NULL
; s
= s
->next
)
4958 if ((s
->flags
& SEC_ALLOC
) == SEC_ALLOC
)
4964 TOCstart
= s
->output_section
->vma
+ s
->output_offset
;
4969 /* Build all the stubs associated with the current output file.
4970 The stubs are kept in a hash table attached to the main linker
4971 hash table. This function is called via gldelf64ppc_finish. */
4974 ppc64_elf_build_stubs (info
)
4975 struct bfd_link_info
*info
;
4977 struct ppc_link_hash_table
*htab
= ppc_hash_table (info
);
4982 for (stub_sec
= htab
->stub_bfd
->sections
;
4984 stub_sec
= stub_sec
->next
)
4988 /* Allocate memory to hold the linker stubs. */
4989 size
= stub_sec
->_raw_size
;
4992 stub_sec
->contents
= (bfd_byte
*) bfd_zalloc (htab
->stub_bfd
, size
);
4993 if (stub_sec
->contents
== NULL
)
4996 stub_sec
->_cooked_size
= 0;
4999 if (htab
->splt
!= NULL
)
5001 /* Build the .glink plt call stub. */
5002 plt_r2
= (htab
->splt
->output_offset
5003 + htab
->splt
->output_section
->vma
5004 - elf_gp (htab
->splt
->output_section
->owner
)
5006 p
= htab
->sglink
->contents
;
5007 p
= build_plt_stub (htab
->sglink
->owner
, p
, (int) plt_r2
, 1);
5008 while (p
- htab
->sglink
->contents
< GLINK_CALL_STUB_SIZE
)
5010 bfd_put_32 (htab
->sglink
->owner
, NOP
, p
);
5013 htab
->sglink
->_cooked_size
= p
- htab
->sglink
->contents
;
5015 /* Use reloc_count to count entries. */
5016 htab
->sglink
->reloc_count
= 0;
5019 if (htab
->sbrlt
->_raw_size
!= 0)
5021 htab
->sbrlt
->contents
= (bfd_byte
*) bfd_zalloc (htab
->sbrlt
->owner
,
5022 htab
->sbrlt
->_raw_size
);
5023 if (htab
->sbrlt
->contents
== NULL
)
5027 /* Build the stubs as directed by the stub hash table. */
5028 bfd_hash_traverse (&htab
->stub_hash_table
, ppc_build_one_stub
, info
);
5029 htab
->sglink
->reloc_count
= 0;
5031 for (stub_sec
= htab
->stub_bfd
->sections
;
5033 stub_sec
= stub_sec
->next
)
5035 if (stub_sec
->_raw_size
!= stub_sec
->_cooked_size
)
5039 if (stub_sec
!= NULL
5040 || htab
->sglink
->_raw_size
!= htab
->sglink
->_cooked_size
)
5042 htab
->stub_error
= true;
5043 (*_bfd_error_handler
) (_("stubs don't match calculated size"));
5046 return !htab
->stub_error
;
5049 /* Set up any other section flags and such that may be necessary. */
5052 ppc64_elf_fake_sections (abfd
, shdr
, asect
)
5053 bfd
*abfd ATTRIBUTE_UNUSED
;
5054 Elf64_Internal_Shdr
*shdr
;
5057 if ((asect
->flags
& SEC_EXCLUDE
) != 0)
5058 shdr
->sh_flags
|= SHF_EXCLUDE
;
5060 if ((asect
->flags
& SEC_SORT_ENTRIES
) != 0)
5061 shdr
->sh_type
= SHT_ORDERED
;
5066 /* The RELOCATE_SECTION function is called by the ELF backend linker
5067 to handle the relocations for a section.
5069 The relocs are always passed as Rela structures; if the section
5070 actually uses Rel structures, the r_addend field will always be
5073 This function is responsible for adjust the section contents as
5074 necessary, and (if using Rela relocs and generating a
5075 relocateable output file) adjusting the reloc addend as
5078 This function does not have to worry about setting the reloc
5079 address or the reloc symbol index.
5081 LOCAL_SYMS is a pointer to the swapped in local symbols.
5083 LOCAL_SECTIONS is an array giving the section in the input file
5084 corresponding to the st_shndx field of each local symbol.
5086 The global hash table entry for the global symbols can be found
5087 via elf_sym_hashes (input_bfd).
5089 When generating relocateable output, this function must handle
5090 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5091 going to be the section symbol corresponding to the output
5092 section, which means that the addend must be adjusted
5096 ppc64_elf_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
5097 contents
, relocs
, local_syms
, local_sections
)
5099 struct bfd_link_info
*info
;
5101 asection
*input_section
;
5103 Elf_Internal_Rela
*relocs
;
5104 Elf_Internal_Sym
*local_syms
;
5105 asection
**local_sections
;
5107 struct ppc_link_hash_table
*htab
;
5108 Elf_Internal_Shdr
*symtab_hdr
;
5109 struct elf_link_hash_entry
**sym_hashes
;
5110 Elf_Internal_Rela
*rel
;
5111 Elf_Internal_Rela
*relend
;
5112 bfd_vma
*local_got_offsets
;
5116 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
5117 boolean is_power4
= false;
5119 if (info
->relocateable
)
5122 /* Initialize howto table if needed. */
5123 if (!ppc64_elf_howto_table
[R_PPC64_ADDR32
])
5126 htab
= ppc_hash_table (info
);
5127 local_got_offsets
= elf_local_got_offsets (input_bfd
);
5128 TOCstart
= elf_gp (output_bfd
);
5129 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
5130 sym_hashes
= elf_sym_hashes (input_bfd
);
5131 is_opd
= strcmp (bfd_get_section_name (abfd
, input_section
), ".opd") == 0;
5134 relend
= relocs
+ input_section
->reloc_count
;
5135 for (; rel
< relend
; rel
++)
5137 enum elf_ppc_reloc_type r_type
;
5140 bfd_reloc_status_type r
;
5141 Elf_Internal_Sym
*sym
;
5143 struct elf_link_hash_entry
*h
;
5144 struct elf_link_hash_entry
*fdh
;
5145 const char *sym_name
;
5146 unsigned long r_symndx
;
5148 boolean unresolved_reloc
;
5151 struct ppc_stub_hash_entry
*stub_entry
;
5152 bfd_vma max_br_offset
;
5155 r_type
= (enum elf_ppc_reloc_type
) ELF64_R_TYPE (rel
->r_info
);
5156 r_symndx
= ELF64_R_SYM (rel
->r_info
);
5157 offset
= rel
->r_offset
;
5158 addend
= rel
->r_addend
;
5159 r
= bfd_reloc_other
;
5160 sym
= (Elf_Internal_Sym
*) 0;
5161 sec
= (asection
*) 0;
5162 h
= (struct elf_link_hash_entry
*) 0;
5163 sym_name
= (const char *) 0;
5164 unresolved_reloc
= false;
5167 if (r_type
== R_PPC64_TOC
)
5169 /* Relocation value is TOC base. Symbol is ignored. */
5170 relocation
= TOCstart
+ TOC_BASE_OFF
;
5172 else if (r_symndx
< symtab_hdr
->sh_info
)
5174 /* It's a local symbol. */
5175 sym
= local_syms
+ r_symndx
;
5176 sec
= local_sections
[r_symndx
];
5177 sym_name
= "<local symbol>";
5179 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, sec
, rel
);
5180 /* rel may have changed, update our copy of addend. */
5181 addend
= rel
->r_addend
;
5185 /* It's a global symbol. */
5186 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
5187 while (h
->root
.type
== bfd_link_hash_indirect
5188 || h
->root
.type
== bfd_link_hash_warning
)
5189 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5190 sym_name
= h
->root
.root
.string
;
5192 if (h
->root
.type
== bfd_link_hash_defined
5193 || h
->root
.type
== bfd_link_hash_defweak
)
5195 sec
= h
->root
.u
.def
.section
;
5196 if (sec
->output_section
== NULL
)
5197 /* Set a flag that will be cleared later if we find a
5198 relocation value for this symbol. output_section
5199 is typically NULL for symbols satisfied by a shared
5201 unresolved_reloc
= true;
5203 relocation
= (h
->root
.u
.def
.value
5204 + sec
->output_section
->vma
5205 + sec
->output_offset
);
5207 else if (h
->root
.type
== bfd_link_hash_undefweak
)
5209 else if (info
->shared
5210 && (!info
->symbolic
|| info
->allow_shlib_undefined
)
5211 && !info
->no_undefined
5212 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
5216 if (! ((*info
->callbacks
->undefined_symbol
)
5217 (info
, h
->root
.root
.string
, input_bfd
, input_section
,
5218 offset
, (!info
->shared
5219 || info
->no_undefined
5220 || ELF_ST_VISIBILITY (h
->other
)))))
5226 /* First handle relocations that tweak non-addend part of insn. */
5233 /* Branch taken prediction relocations. */
5234 case R_PPC64_ADDR14_BRTAKEN
:
5235 case R_PPC64_REL14_BRTAKEN
:
5236 insn
= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
5239 /* Branch not taken prediction relocations. */
5240 case R_PPC64_ADDR14_BRNTAKEN
:
5241 case R_PPC64_REL14_BRNTAKEN
:
5242 insn
|= bfd_get_32 (output_bfd
, contents
+ offset
) & ~(0x01 << 21);
5245 /* Set 'a' bit. This is 0b00010 in BO field for branch
5246 on CR(BI) insns (BO == 001at or 011at), and 0b01000
5247 for branch on CTR insns (BO == 1a00t or 1a01t). */
5248 if ((insn
& (0x14 << 21)) == (0x04 << 21))
5250 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
5258 + input_section
->output_offset
5259 + input_section
->output_section
->vma
);
5261 /* Invert 'y' bit if not the default. */
5262 if ((bfd_signed_vma
) (relocation
+ addend
- from
) < 0)
5266 bfd_put_32 (output_bfd
, (bfd_vma
) insn
, contents
+ offset
);
5270 /* A REL24 branching to a linkage function is followed by a
5271 nop. We replace the nop with a ld in order to restore
5272 the TOC base pointer. Only calls to shared objects need
5273 to alter the TOC base. These are recognized by their
5274 need for a PLT entry. */
5276 && (fdh
= ((struct ppc_link_hash_entry
*) h
)->oh
) != NULL
5277 && fdh
->plt
.offset
!= (bfd_vma
) -1
5278 && (stub_entry
= ppc_get_stub_entry (input_section
, sec
, fdh
,
5279 rel
, htab
)) != NULL
)
5281 boolean can_plt_call
= 0;
5283 if (offset
+ 8 <= input_section
->_cooked_size
)
5285 insn
= bfd_get_32 (input_bfd
, contents
+ offset
+ 4);
5287 || insn
== CROR_151515
|| insn
== CROR_313131
)
5289 bfd_put_32 (input_bfd
, (bfd_vma
) LD_R2_40R1
,
5290 contents
+ offset
+ 4);
5297 /* If this is a plain branch rather than a branch
5298 and link, don't require a nop. */
5299 insn
= bfd_get_32 (input_bfd
, contents
+ offset
);
5300 if ((insn
& 1) == 0)
5306 relocation
= (stub_entry
->stub_offset
5307 + stub_entry
->stub_sec
->output_offset
5308 + stub_entry
->stub_sec
->output_section
->vma
);
5310 unresolved_reloc
= false;
5315 && h
->root
.type
== bfd_link_hash_undefweak
5319 /* Tweak calls to undefined weak functions to point at a
5320 blr. We can thus call a weak function without first
5321 checking whether the function is defined. We have a
5322 blr at the end of .sfpr. */
5323 BFD_ASSERT (htab
->sfpr
->_raw_size
!= 0);
5324 relocation
= (htab
->sfpr
->_raw_size
- 4
5325 + htab
->sfpr
->output_offset
5326 + htab
->sfpr
->output_section
->vma
);
5328 + input_section
->output_offset
5329 + input_section
->output_section
->vma
);
5331 /* But let's not be silly about it. If the blr isn't in
5332 reach, just go to the next instruction. */
5333 if (relocation
- from
+ (1 << 25) >= (1 << 26)
5334 || htab
->sfpr
->_raw_size
== 0)
5335 relocation
= from
+ 4;
5344 (*_bfd_error_handler
)
5345 (_("%s: unknown relocation type %d for symbol %s"),
5346 bfd_archive_filename (input_bfd
), (int) r_type
, sym_name
);
5348 bfd_set_error (bfd_error_bad_value
);
5353 case R_PPC_GNU_VTINHERIT
:
5354 case R_PPC_GNU_VTENTRY
:
5357 /* GOT16 relocations. Like an ADDR16 using the symbol's
5358 address in the GOT as relocation value instead of the
5359 symbols value itself. Also, create a GOT entry for the
5360 symbol and put the symbol value there. */
5362 case R_PPC64_GOT16_LO
:
5363 case R_PPC64_GOT16_HI
:
5364 case R_PPC64_GOT16_HA
:
5365 case R_PPC64_GOT16_DS
:
5366 case R_PPC64_GOT16_LO_DS
:
5368 /* Relocation is to the entry for this symbol in the global
5372 if (htab
->sgot
== NULL
)
5379 off
= h
->got
.offset
;
5380 dyn
= htab
->elf
.dynamic_sections_created
;
5381 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
, h
)
5385 || (h
->elf_link_hash_flags
5386 & ELF_LINK_FORCED_LOCAL
))
5387 && (h
->elf_link_hash_flags
5388 & ELF_LINK_HASH_DEF_REGULAR
)))
5390 /* This is actually a static link, or it is a
5391 -Bsymbolic link and the symbol is defined
5392 locally, or the symbol was forced to be local
5393 because of a version file. We must initialize
5394 this entry in the global offset table. Since the
5395 offset must always be a multiple of 8, we use the
5396 least significant bit to record whether we have
5397 initialized it already.
5399 When doing a dynamic link, we create a .rel.got
5400 relocation entry to initialize the value. This
5401 is done in the finish_dynamic_symbol routine. */
5406 bfd_put_64 (output_bfd
, relocation
,
5407 htab
->sgot
->contents
+ off
);
5412 unresolved_reloc
= false;
5416 if (local_got_offsets
== NULL
)
5419 off
= local_got_offsets
[r_symndx
];
5421 /* The offset must always be a multiple of 8. We use
5422 the least significant bit to record whether we have
5423 already processed this entry. */
5428 bfd_put_64 (output_bfd
, relocation
,
5429 htab
->sgot
->contents
+ off
);
5433 Elf_Internal_Rela outrel
;
5434 Elf64_External_Rela
*loc
;
5436 /* We need to generate a R_PPC64_RELATIVE reloc
5437 for the dynamic linker. */
5438 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
5439 + htab
->sgot
->output_offset
5441 outrel
.r_info
= ELF64_R_INFO (0, R_PPC64_RELATIVE
);
5442 outrel
.r_addend
= relocation
;
5443 loc
= (Elf64_External_Rela
*) htab
->srelgot
->contents
;
5444 loc
+= htab
->srelgot
->reloc_count
++;
5445 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
5448 local_got_offsets
[r_symndx
] |= 1;
5452 if (off
>= (bfd_vma
) -2)
5455 relocation
= htab
->sgot
->output_offset
+ off
;
5457 /* TOC base (r2) is TOC start plus 0x8000. */
5458 addend
-= TOC_BASE_OFF
;
5462 case R_PPC64_PLT16_HA
:
5463 case R_PPC64_PLT16_HI
:
5464 case R_PPC64_PLT16_LO
:
5467 /* Relocation is to the entry for this symbol in the
5468 procedure linkage table. */
5470 /* Resolve a PLT reloc against a local symbol directly,
5471 without using the procedure linkage table. */
5475 if (h
->plt
.offset
== (bfd_vma
) -1
5476 || htab
->splt
== NULL
)
5478 /* We didn't make a PLT entry for this symbol. This
5479 happens when statically linking PIC code, or when
5480 using -Bsymbolic. */
5484 relocation
= (htab
->splt
->output_section
->vma
5485 + htab
->splt
->output_offset
5487 unresolved_reloc
= false;
5490 /* TOC16 relocs. We want the offset relative to the TOC base,
5491 which is the address of the start of the TOC plus 0x8000.
5492 The TOC consists of sections .got, .toc, .tocbss, and .plt,
5495 case R_PPC64_TOC16_LO
:
5496 case R_PPC64_TOC16_HI
:
5497 case R_PPC64_TOC16_DS
:
5498 case R_PPC64_TOC16_LO_DS
:
5499 case R_PPC64_TOC16_HA
:
5500 addend
-= TOCstart
+ TOC_BASE_OFF
;
5503 /* Relocate against the beginning of the section. */
5504 case R_PPC64_SECTOFF
:
5505 case R_PPC64_SECTOFF_LO
:
5506 case R_PPC64_SECTOFF_HI
:
5507 case R_PPC64_SECTOFF_DS
:
5508 case R_PPC64_SECTOFF_LO_DS
:
5509 case R_PPC64_SECTOFF_HA
:
5510 if (sec
!= (asection
*) 0)
5511 addend
-= sec
->output_section
->vma
;
5515 case R_PPC64_REL14_BRNTAKEN
:
5516 case R_PPC64_REL14_BRTAKEN
:
5520 /* Relocations that may need to be propagated if this is a
5524 case R_PPC64_ADDR14
:
5525 case R_PPC64_ADDR14_BRNTAKEN
:
5526 case R_PPC64_ADDR14_BRTAKEN
:
5527 case R_PPC64_ADDR16
:
5528 case R_PPC64_ADDR16_DS
:
5529 case R_PPC64_ADDR16_HA
:
5530 case R_PPC64_ADDR16_HI
:
5531 case R_PPC64_ADDR16_HIGHER
:
5532 case R_PPC64_ADDR16_HIGHERA
:
5533 case R_PPC64_ADDR16_HIGHEST
:
5534 case R_PPC64_ADDR16_HIGHESTA
:
5535 case R_PPC64_ADDR16_LO
:
5536 case R_PPC64_ADDR16_LO_DS
:
5537 case R_PPC64_ADDR24
:
5538 case R_PPC64_ADDR30
:
5539 case R_PPC64_ADDR32
:
5540 case R_PPC64_ADDR64
:
5541 case R_PPC64_UADDR16
:
5542 case R_PPC64_UADDR32
:
5543 case R_PPC64_UADDR64
:
5544 /* r_symndx will be zero only for relocs against symbols
5545 from removed linkonce sections, or sections discarded by
5552 if ((input_section
->flags
& SEC_ALLOC
) == 0)
5555 if (NO_OPD_RELOCS
&& is_opd
)
5559 && (IS_ABSOLUTE_RELOC (r_type
)
5562 && (! info
->symbolic
5563 || (h
->elf_link_hash_flags
5564 & ELF_LINK_HASH_DEF_REGULAR
) == 0))))
5568 && (h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0
5569 && (((h
->elf_link_hash_flags
5570 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0
5571 && (h
->elf_link_hash_flags
5572 & ELF_LINK_HASH_DEF_REGULAR
) == 0)
5573 || h
->root
.type
== bfd_link_hash_undefweak
5574 || h
->root
.type
== bfd_link_hash_undefined
)))
5576 Elf_Internal_Rela outrel
;
5577 boolean skip
, relocate
;
5579 Elf64_External_Rela
*loc
;
5581 /* When generating a dynamic object, these relocations
5582 are copied into the output file to be resolved at run
5589 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5591 if (outrel
.r_offset
== (bfd_vma
) -1)
5593 else if (outrel
.r_offset
== (bfd_vma
) -2)
5594 skip
= true, relocate
= true;
5595 outrel
.r_offset
+= (input_section
->output_section
->vma
5596 + input_section
->output_offset
);
5597 outrel
.r_addend
= addend
;
5600 memset (&outrel
, 0, sizeof outrel
);
5604 && (!IS_ABSOLUTE_RELOC (r_type
)
5607 || (h
->elf_link_hash_flags
5608 & ELF_LINK_HASH_DEF_REGULAR
) == 0))
5609 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
5612 /* This symbol is local, or marked to become local,
5613 or this is an opd section reloc which must point
5614 at a local function. */
5615 outrel
.r_addend
+= relocation
;
5617 if (r_type
== R_PPC64_ADDR64
|| r_type
== R_PPC64_TOC
)
5619 if (is_opd
&& h
!= NULL
)
5621 /* Lie about opd entries. This case occurs
5622 when building shared libraries and we
5623 reference a function in another shared
5624 lib. The same thing happens for a weak
5625 definition in an application that's
5626 overridden by a strong definition in a
5627 shared lib. (I believe this is a generic
5628 bug in binutils handling of weak syms.)
5629 In these cases we won't use the opd
5630 entry in this lib; We ought to edit the
5631 opd section to remove unused entries. */
5632 unresolved_reloc
= false;
5634 outrel
.r_info
= ELF64_R_INFO (0, R_PPC64_RELATIVE
);
5640 if (bfd_is_abs_section (sec
))
5642 else if (sec
== NULL
|| sec
->owner
== NULL
)
5644 bfd_set_error (bfd_error_bad_value
);
5651 osec
= sec
->output_section
;
5652 indx
= elf_section_data (osec
)->dynindx
;
5654 /* We are turning this relocation into one
5655 against a section symbol, so subtract out
5656 the output section's address but not the
5657 offset of the input section in the output
5659 outrel
.r_addend
-= osec
->vma
;
5662 outrel
.r_info
= ELF64_R_INFO (indx
, r_type
);
5666 sreloc
= elf_section_data (input_section
)->sreloc
;
5670 loc
= (Elf64_External_Rela
*) sreloc
->contents
;
5671 loc
+= sreloc
->reloc_count
++;
5672 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
5674 /* If this reloc is against an external symbol, it will
5675 be computed at runtime, so there's no need to do
5683 case R_PPC64_GLOB_DAT
:
5684 case R_PPC64_JMP_SLOT
:
5685 case R_PPC64_RELATIVE
:
5686 /* We shouldn't ever see these dynamic relocs in relocatable
5690 case R_PPC64_PLTGOT16
:
5691 case R_PPC64_PLTGOT16_DS
:
5692 case R_PPC64_PLTGOT16_HA
:
5693 case R_PPC64_PLTGOT16_HI
:
5694 case R_PPC64_PLTGOT16_LO
:
5695 case R_PPC64_PLTGOT16_LO_DS
:
5696 case R_PPC64_PLTREL32
:
5697 case R_PPC64_PLTREL64
:
5698 /* These ones haven't been implemented yet. */
5700 (*_bfd_error_handler
)
5701 (_("%s: Relocation %s is not supported for symbol %s."),
5702 bfd_archive_filename (input_bfd
),
5703 ppc64_elf_howto_table
[(int) r_type
]->name
, sym_name
);
5705 bfd_set_error (bfd_error_invalid_operation
);
5710 /* Do any further special processing. */
5716 case R_PPC64_ADDR16_HA
:
5717 case R_PPC64_ADDR16_HIGHERA
:
5718 case R_PPC64_ADDR16_HIGHESTA
:
5719 case R_PPC64_PLT16_HA
:
5720 case R_PPC64_TOC16_HA
:
5721 case R_PPC64_SECTOFF_HA
:
5722 /* It's just possible that this symbol is a weak symbol
5723 that's not actually defined anywhere. In that case,
5724 'sec' would be NULL, and we should leave the symbol
5725 alone (it will be set to zero elsewhere in the link). */
5727 /* Add 0x10000 if sign bit in 0:15 is set. */
5728 addend
+= ((relocation
+ addend
) & 0x8000) << 1;
5731 case R_PPC64_ADDR16_DS
:
5732 case R_PPC64_ADDR16_LO_DS
:
5733 case R_PPC64_GOT16_DS
:
5734 case R_PPC64_GOT16_LO_DS
:
5735 case R_PPC64_PLT16_LO_DS
:
5736 case R_PPC64_SECTOFF_DS
:
5737 case R_PPC64_SECTOFF_LO_DS
:
5738 case R_PPC64_TOC16_DS
:
5739 case R_PPC64_TOC16_LO_DS
:
5740 case R_PPC64_PLTGOT16_DS
:
5741 case R_PPC64_PLTGOT16_LO_DS
:
5742 if (((relocation
+ addend
) & 3) != 0)
5744 (*_bfd_error_handler
)
5745 (_("%s: error: relocation %s not a multiple of 4"),
5746 bfd_archive_filename (input_bfd
),
5747 ppc64_elf_howto_table
[(int) r_type
]->name
);
5748 bfd_set_error (bfd_error_bad_value
);
5755 case R_PPC64_REL14_BRNTAKEN
:
5756 case R_PPC64_REL14_BRTAKEN
:
5757 max_br_offset
= 1 << 15;
5761 max_br_offset
= 1 << 25;
5764 /* If the branch is out of reach, then redirect the
5765 call to the local stub for this function. */
5767 + input_section
->output_offset
5768 + input_section
->output_section
->vma
);
5769 if (relocation
+ addend
- from
+ max_br_offset
>= 2 * max_br_offset
5770 && (stub_entry
= ppc_get_stub_entry (input_section
, sec
, h
,
5771 rel
, htab
)) != NULL
)
5773 /* Munge up the value and addend so that we call the stub
5774 rather than the procedure directly. */
5775 relocation
= (stub_entry
->stub_offset
5776 + stub_entry
->stub_sec
->output_offset
5777 + stub_entry
->stub_sec
->output_section
->vma
);
5783 /* FIXME: Why do we allow debugging sections to escape this error?
5784 More importantly, why do we not emit dynamic relocs above in
5785 debugging sections (which are ! SEC_ALLOC)? If we had
5786 emitted the dynamic reloc, we could remove the fudge here. */
5787 if (unresolved_reloc
5789 && (input_section
->flags
& SEC_DEBUGGING
) != 0
5790 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0))
5792 (*_bfd_error_handler
)
5793 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
5794 bfd_archive_filename (input_bfd
),
5795 bfd_get_section_name (input_bfd
, input_section
),
5796 (long) rel
->r_offset
,
5797 h
->root
.root
.string
);
5801 r
= _bfd_final_link_relocate (ppc64_elf_howto_table
[(int) r_type
],
5809 if (r
!= bfd_reloc_ok
)
5815 if (h
->root
.type
== bfd_link_hash_undefweak
5816 && ppc64_elf_howto_table
[(int) r_type
]->pc_relative
)
5818 /* Assume this is a call protected by other code that
5819 detects the symbol is undefined. If this is the case,
5820 we can safely ignore the overflow. If not, the
5821 program is hosed anyway, and a little warning isn't
5827 name
= h
->root
.root
.string
;
5831 name
= bfd_elf_string_from_elf_section (input_bfd
,
5832 symtab_hdr
->sh_link
,
5837 name
= bfd_section_name (input_bfd
, sec
);
5840 if (r
== bfd_reloc_overflow
)
5844 if (!((*info
->callbacks
->reloc_overflow
)
5845 (info
, name
, ppc64_elf_howto_table
[(int) r_type
]->name
,
5846 rel
->r_addend
, input_bfd
, input_section
, offset
)))
5851 (*_bfd_error_handler
)
5852 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
5853 bfd_archive_filename (input_bfd
),
5854 bfd_get_section_name (input_bfd
, input_section
),
5855 (long) rel
->r_offset
, name
, (int) r
);
5864 /* Finish up dynamic symbol handling. We set the contents of various
5865 dynamic sections here. */
5868 ppc64_elf_finish_dynamic_symbol (output_bfd
, info
, h
, sym
)
5870 struct bfd_link_info
*info
;
5871 struct elf_link_hash_entry
*h
;
5872 Elf_Internal_Sym
*sym
;
5874 struct ppc_link_hash_table
*htab
;
5877 htab
= ppc_hash_table (info
);
5878 dynobj
= htab
->elf
.dynobj
;
5880 if (h
->plt
.offset
!= (bfd_vma
) -1
5881 && ((struct ppc_link_hash_entry
*) h
)->is_func_descriptor
)
5883 Elf_Internal_Rela rela
;
5884 Elf64_External_Rela
*loc
;
5886 /* This symbol has an entry in the procedure linkage table. Set
5889 if (htab
->splt
== NULL
5890 || htab
->srelplt
== NULL
5891 || htab
->sglink
== NULL
)
5894 /* Create a JMP_SLOT reloc to inform the dynamic linker to
5895 fill in the PLT entry. */
5897 rela
.r_offset
= (htab
->splt
->output_section
->vma
5898 + htab
->splt
->output_offset
5900 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_PPC64_JMP_SLOT
);
5903 loc
= (Elf64_External_Rela
*) htab
->srelplt
->contents
;
5904 loc
+= (h
->plt
.offset
- PLT_INITIAL_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
5905 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
5908 if (h
->got
.offset
!= (bfd_vma
) -1)
5910 Elf_Internal_Rela rela
;
5911 Elf64_External_Rela
*loc
;
5913 /* This symbol has an entry in the global offset table. Set it
5916 if (htab
->sgot
== NULL
|| htab
->srelgot
== NULL
)
5919 rela
.r_offset
= (htab
->sgot
->output_section
->vma
5920 + htab
->sgot
->output_offset
5921 + (h
->got
.offset
&~ (bfd_vma
) 1));
5923 /* If this is a static link, or it is a -Bsymbolic link and the
5924 symbol is defined locally or was forced to be local because
5925 of a version file, we just want to emit a RELATIVE reloc.
5926 The entry in the global offset table will already have been
5927 initialized in the relocate_section function. */
5931 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
))
5932 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
))
5934 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5935 rela
.r_info
= ELF64_R_INFO (0, R_PPC64_RELATIVE
);
5936 rela
.r_addend
= (h
->root
.u
.def
.value
5937 + h
->root
.u
.def
.section
->output_section
->vma
5938 + h
->root
.u
.def
.section
->output_offset
);
5942 BFD_ASSERT ((h
->got
.offset
& 1) == 0);
5943 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5944 htab
->sgot
->contents
+ h
->got
.offset
);
5945 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_PPC64_GLOB_DAT
);
5949 loc
= (Elf64_External_Rela
*) htab
->srelgot
->contents
;
5950 loc
+= htab
->srelgot
->reloc_count
++;
5951 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
5954 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_COPY
) != 0)
5956 Elf_Internal_Rela rela
;
5957 Elf64_External_Rela
*loc
;
5959 /* This symbol needs a copy reloc. Set it up. */
5961 if (h
->dynindx
== -1
5962 || (h
->root
.type
!= bfd_link_hash_defined
5963 && h
->root
.type
!= bfd_link_hash_defweak
)
5964 || htab
->srelbss
== NULL
)
5967 rela
.r_offset
= (h
->root
.u
.def
.value
5968 + h
->root
.u
.def
.section
->output_section
->vma
5969 + h
->root
.u
.def
.section
->output_offset
);
5970 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_PPC64_COPY
);
5972 loc
= (Elf64_External_Rela
*) htab
->srelbss
->contents
;
5973 loc
+= htab
->srelbss
->reloc_count
++;
5974 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
5977 /* Mark some specially defined symbols as absolute. */
5978 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0)
5979 sym
->st_shndx
= SHN_ABS
;
5984 /* Used to decide how to sort relocs in an optimal manner for the
5985 dynamic linker, before writing them out. */
5987 static enum elf_reloc_type_class
5988 ppc64_elf_reloc_type_class (rela
)
5989 const Elf_Internal_Rela
*rela
;
5991 enum elf_ppc_reloc_type r_type
;
5993 r_type
= (enum elf_ppc_reloc_type
) ELF64_R_TYPE (rela
->r_info
);
5996 case R_PPC64_RELATIVE
:
5997 return reloc_class_relative
;
5998 case R_PPC64_JMP_SLOT
:
5999 return reloc_class_plt
;
6001 return reloc_class_copy
;
6003 return reloc_class_normal
;
6007 /* Finish up the dynamic sections. */
6010 ppc64_elf_finish_dynamic_sections (output_bfd
, info
)
6012 struct bfd_link_info
*info
;
6014 struct ppc_link_hash_table
*htab
;
6018 htab
= ppc_hash_table (info
);
6019 dynobj
= htab
->elf
.dynobj
;
6020 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
6022 if (htab
->elf
.dynamic_sections_created
)
6024 Elf64_External_Dyn
*dyncon
, *dynconend
;
6026 if (sdyn
== NULL
|| htab
->sgot
== NULL
)
6029 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
6030 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->_raw_size
);
6031 for (; dyncon
< dynconend
; dyncon
++)
6033 Elf_Internal_Dyn dyn
;
6036 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
6043 case DT_PPC64_GLINK
:
6044 dyn
.d_un
.d_ptr
= (htab
->sglink
->output_section
->vma
6045 + htab
->sglink
->output_offset
);
6049 s
= bfd_get_section_by_name (output_bfd
, ".opd");
6051 dyn
.d_un
.d_ptr
= s
->vma
;
6054 case DT_PPC64_OPDSZ
:
6055 s
= bfd_get_section_by_name (output_bfd
, ".opd");
6057 dyn
.d_un
.d_val
= s
->_raw_size
;
6061 dyn
.d_un
.d_ptr
= (htab
->splt
->output_section
->vma
6062 + htab
->splt
->output_offset
);
6066 dyn
.d_un
.d_ptr
= (htab
->srelplt
->output_section
->vma
6067 + htab
->srelplt
->output_offset
);
6071 dyn
.d_un
.d_val
= htab
->srelplt
->_raw_size
;
6075 /* Don't count procedure linkage table relocs in the
6076 overall reloc count. */
6077 if (htab
->srelplt
!= NULL
)
6078 dyn
.d_un
.d_val
-= htab
->srelplt
->_raw_size
;
6082 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
6086 if (htab
->sgot
!= NULL
&& htab
->sgot
->_raw_size
!= 0)
6088 /* Fill in the first entry in the global offset table.
6089 We use it to hold the link-time TOCbase. */
6090 bfd_put_64 (output_bfd
,
6091 elf_gp (output_bfd
) + TOC_BASE_OFF
,
6092 htab
->sgot
->contents
);
6094 /* Set .got entry size. */
6095 elf_section_data (htab
->sgot
->output_section
)->this_hdr
.sh_entsize
= 8;
6098 if (htab
->splt
!= NULL
&& htab
->splt
->_raw_size
!= 0)
6100 /* Set .plt entry size. */
6101 elf_section_data (htab
->splt
->output_section
)->this_hdr
.sh_entsize
6108 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
6109 #define TARGET_LITTLE_NAME "elf64-powerpcle"
6110 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
6111 #define TARGET_BIG_NAME "elf64-powerpc"
6112 #define ELF_ARCH bfd_arch_powerpc
6113 #define ELF_MACHINE_CODE EM_PPC64
6114 #define ELF_MAXPAGESIZE 0x10000
6115 #define elf_info_to_howto ppc64_elf_info_to_howto
6117 #ifdef EM_CYGNUS_POWERPC
6118 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6122 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6125 #define elf_backend_want_got_sym 0
6126 #define elf_backend_want_plt_sym 0
6127 #define elf_backend_plt_alignment 3
6128 #define elf_backend_plt_not_loaded 1
6129 #define elf_backend_got_symbol_offset 0
6130 #define elf_backend_got_header_size 8
6131 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
6132 #define elf_backend_can_gc_sections 1
6133 #define elf_backend_can_refcount 1
6134 #define elf_backend_rela_normal 1
6136 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
6137 #define bfd_elf64_bfd_set_private_flags ppc64_elf_set_private_flags
6138 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
6139 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
6140 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
6141 #define bfd_elf64_get_symbol_info ppc64_elf_get_symbol_info
6143 #define elf_backend_section_from_shdr ppc64_elf_section_from_shdr
6144 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
6145 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
6146 #define elf_backend_check_relocs ppc64_elf_check_relocs
6147 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
6148 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
6149 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
6150 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
6151 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
6152 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
6153 #define elf_backend_fake_sections ppc64_elf_fake_sections
6154 #define elf_backend_relocate_section ppc64_elf_relocate_section
6155 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
6156 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
6157 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
6159 #include "elf64-target.h"