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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
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5bd4f169 1/* PowerPC64-specific support for 64-bit ELF.
5d1634d7 2 Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
5bd4f169
AM		 3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5
6This file is part of BFD, the Binary File Descriptor library.
7
8This program is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 2 of the License, or
11(at your option) any later version.
12
13This program is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with this program; if not, write to the Free Software
20Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21
22/* This file is based on the 64-bit PowerPC ELF ABI. It is also based
23 on the file elf32-ppc.c. */
24
25#include "bfd.h"
26#include "sysdep.h"
27#include "bfdlink.h"
28#include "libbfd.h"
29#include "elf-bfd.h"
30#include "elf/ppc.h"
5d1634d7 31#include "elf64-ppc.h"
5bd4f169
AM		 32
33#define USE_RELA /* we want RELA relocations, not REL. */
34
35
36static void ppc_howto_init
37 PARAMS ((void));
38static reloc_howto_type *ppc64_elf_reloc_type_lookup
39 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
40static void ppc64_elf_info_to_howto
41 PARAMS ((bfd *abfd, arelent *cache_ptr, Elf64_Internal_Rela *dst));
42static bfd_reloc_status_type ppc64_elf_addr16_ha_reloc
43 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
44static boolean ppc64_elf_set_private_flags
45 PARAMS ((bfd *, flagword));
5bd4f169
AM		 46static boolean ppc64_elf_merge_private_bfd_data
47 PARAMS ((bfd *, bfd *));
48static boolean ppc64_elf_section_from_shdr
49 PARAMS ((bfd *, Elf64_Internal_Shdr *, char *));
65f38f15
AM		 50static struct bfd_hash_entry *link_hash_newfunc
51 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
52static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create
53 PARAMS ((bfd *));
54static boolean create_got_section
55 PARAMS ((bfd *, struct bfd_link_info *));
5bd4f169
AM		 56static boolean ppc64_elf_create_dynamic_sections
57 PARAMS ((bfd *, struct bfd_link_info *));
65f38f15
AM		 58static void ppc64_elf_copy_indirect_symbol
59 PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
5bd4f169
AM		 60static boolean ppc64_elf_check_relocs
61 PARAMS ((bfd *, struct bfd_link_info *, asection *,
62 const Elf_Internal_Rela *));
63static asection * ppc64_elf_gc_mark_hook
64 PARAMS ((bfd *abfd, struct bfd_link_info *info, Elf_Internal_Rela *rel,
65 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
66static boolean ppc64_elf_gc_sweep_hook
67 PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *sec,
68 const Elf_Internal_Rela *relocs));
e86ce104
AM		 69static boolean func_desc_adjust
70 PARAMS ((struct elf_link_hash_entry *, PTR));
71static boolean ppc64_elf_func_desc_adjust
72 PARAMS ((bfd *, struct bfd_link_info *));
5bd4f169
AM		 73static boolean ppc64_elf_adjust_dynamic_symbol
74 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
e86ce104
AM		 75static void ppc64_elf_hide_symbol
76 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean));
65f38f15
AM		 77static boolean allocate_dynrelocs
78 PARAMS ((struct elf_link_hash_entry *, PTR));
79static boolean readonly_dynrelocs
5bd4f169 80 PARAMS ((struct elf_link_hash_entry *, PTR));
65f38f15
AM		 81static enum elf_reloc_type_class ppc64_elf_reloc_type_class
82 PARAMS ((const Elf_Internal_Rela *));
5bd4f169
AM		 83static boolean ppc64_elf_size_dynamic_sections
84 PARAMS ((bfd *, struct bfd_link_info *));
5d1634d7
AM		 85static bfd_byte *build_plt_stub
86 PARAMS ((bfd *, bfd_byte *, int, int));
87static boolean build_one_stub
88 PARAMS ((struct elf_link_hash_entry *, PTR));
5bd4f169
AM		 89static boolean ppc64_elf_fake_sections
90 PARAMS ((bfd *, Elf64_Internal_Shdr *, asection *));
91static boolean ppc64_elf_relocate_section
92 PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *,
93 Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
94 asection **));
95static boolean ppc64_elf_finish_dynamic_symbol
96 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
97 Elf_Internal_Sym *));
98static boolean ppc64_elf_finish_dynamic_sections
99 PARAMS ((bfd *, struct bfd_link_info *));
100
101
5bd4f169
AM		 102/* Mask to set RA in memory instructions. */
103#define RA_REGISTER_MASK 0x001f0000
104
105/* Value to shift register by to insert RA. */
106#define RA_REGISTER_SHIFT 16
107
108/* The name of the dynamic interpreter. This is put in the .interp
109 section. */
110#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
111
112/* The size in bytes of an entry in the procedure linkage table. */
113#define PLT_ENTRY_SIZE 24
114
115/* The initial size of the plt reserved for the dynamic linker. */
5d1634d7 116#define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
5bd4f169
AM		 117
118/* TOC base pointers offset from start of TOC. */
119#define TOC_BASE_OFF (0x8000)
120
5d1634d7
AM		 121/* .plt call stub instructions. */
122#define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
123#define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
124#define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
125#define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
126#define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
127 /* ld %r11,xxx+16@l(%r12) */
128#define BCTR 0x4e800420 /* bctr */
129
130/* The normal stub is this size. */
131#define PLT_CALL_STUB_SIZE (7*4)
132
133/* But sometimes the .plt entry crosses a 64k boundary, and we need
134 to adjust the high word with this insn. */
135#define ADDIS_R12_R12_1 0x3d8c0001 /* addis %r12,%r12,1 */
5bd4f169 136
5d1634d7
AM		 137/* The .glink fixup call stub is the same as the .plt call stub, but
138 the first instruction restores r2, and the std is omitted. */
139#define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
140
141/* Always allow this much space. */
142#define GLINK_CALL_STUB_SIZE (8*4)
143
144/* Pad with this. */
145#define NOP 0x60000000
146
147/* .glink entries for the first 32k functions are two instructions. */
148#define LI_R0_0 0x38000000 /* li %r0,0 */
149#define B_DOT 0x48000000 /* b . */
150
151/* After that, we need two instructions to load the index, followed by
152 a branch. */
153#define LIS_R0_0 0x3c000000 /* lis %r0,0 */
10ed1bba 154#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
5bd4f169
AM		 155\f
156/* Relocation HOWTO's. */
157static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC_max];
158
159static reloc_howto_type ppc64_elf_howto_raw[] = {
160 /* This reloc does nothing. */
161 HOWTO (R_PPC64_NONE, /* type */
162 0, /* rightshift */
163 2, /* size (0 = byte, 1 = short, 2 = long) */
164 32, /* bitsize */
165 false, /* pc_relative */
166 0, /* bitpos */
167 complain_overflow_bitfield, /* complain_on_overflow */
168 bfd_elf_generic_reloc, /* special_function */
169 "R_PPC64_NONE", /* name */
170 false, /* partial_inplace */
171 0, /* src_mask */
172 0, /* dst_mask */
173 false), /* pcrel_offset */
174
175 /* A standard 32 bit relocation. */
176 HOWTO (R_PPC64_ADDR32, /* type */
177 0, /* rightshift */
178 2, /* size (0 = byte, 1 = short, 2 = long) */
179 32, /* bitsize */
180 false, /* pc_relative */
181 0, /* bitpos */
182 complain_overflow_bitfield, /* complain_on_overflow */
183 bfd_elf_generic_reloc, /* special_function */
184 "R_PPC64_ADDR32", /* name */
185 false, /* partial_inplace */
186 0, /* src_mask */
187 0xffffffff, /* dst_mask */
188 false), /* pcrel_offset */
189
190 /* An absolute 26 bit branch; the lower two bits must be zero.
191 FIXME: we don't check that, we just clear them. */
192 HOWTO (R_PPC64_ADDR24, /* type */
193 0, /* rightshift */
194 2, /* size (0 = byte, 1 = short, 2 = long) */
195 26, /* bitsize */
196 false, /* pc_relative */
197 0, /* bitpos */
198 complain_overflow_bitfield, /* complain_on_overflow */
199 bfd_elf_generic_reloc, /* special_function */
200 "R_PPC64_ADDR24", /* name */
201 false, /* partial_inplace */
202 0, /* src_mask */
203 0x3fffffc, /* dst_mask */
204 false), /* pcrel_offset */
205
206 /* A standard 16 bit relocation. */
207 HOWTO (R_PPC64_ADDR16, /* type */
208 0, /* rightshift */
209 1, /* size (0 = byte, 1 = short, 2 = long) */
210 16, /* bitsize */
211 false, /* pc_relative */
212 0, /* bitpos */
213 complain_overflow_bitfield, /* complain_on_overflow */
214 bfd_elf_generic_reloc, /* special_function */
215 "R_PPC64_ADDR16", /* name */
216 false, /* partial_inplace */
217 0, /* src_mask */
218 0xffff, /* dst_mask */
219 false), /* pcrel_offset */
220
221 /* A 16 bit relocation without overflow. */
222 HOWTO (R_PPC64_ADDR16_LO, /* type */
223 0, /* rightshift */
224 1, /* size (0 = byte, 1 = short, 2 = long) */
225 16, /* bitsize */
226 false, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_dont,/* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_PPC64_ADDR16_LO", /* name */
231 false, /* partial_inplace */
232 0, /* src_mask */
233 0xffff, /* dst_mask */
234 false), /* pcrel_offset */
235
236 /* Bits 16-31 of an address. */
237 HOWTO (R_PPC64_ADDR16_HI, /* type */
238 16, /* rightshift */
239 1, /* size (0 = byte, 1 = short, 2 = long) */
240 16, /* bitsize */
241 false, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_dont, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_PPC64_ADDR16_HI", /* name */
246 false, /* partial_inplace */
247 0, /* src_mask */
248 0xffff, /* dst_mask */
249 false), /* pcrel_offset */
250
251 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
252 bits, treated as a signed number, is negative. */
253 HOWTO (R_PPC64_ADDR16_HA, /* type */
254 16, /* rightshift */
255 1, /* size (0 = byte, 1 = short, 2 = long) */
256 16, /* bitsize */
257 false, /* pc_relative */
258 0, /* bitpos */
259 complain_overflow_dont, /* complain_on_overflow */
260 ppc64_elf_addr16_ha_reloc, /* special_function */
261 "R_PPC64_ADDR16_HA", /* name */
262 false, /* partial_inplace */
263 0, /* src_mask */
264 0xffff, /* dst_mask */
265 false), /* pcrel_offset */
266
267 /* An absolute 16 bit branch; the lower two bits must be zero.
268 FIXME: we don't check that, we just clear them. */
269 HOWTO (R_PPC64_ADDR14, /* type */
270 0, /* rightshift */
271 2, /* size (0 = byte, 1 = short, 2 = long) */
272 16, /* bitsize */
273 false, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_bitfield, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_PPC64_ADDR14", /* name */
278 false, /* partial_inplace */
279 0, /* src_mask */
280 0xfffc, /* dst_mask */
281 false), /* pcrel_offset */
282
283 /* An absolute 16 bit branch, for which bit 10 should be set to
284 indicate that the branch is expected to be taken. The lower two
285 bits must be zero. */
286 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
287 0, /* rightshift */
288 2, /* size (0 = byte, 1 = short, 2 = long) */
289 16, /* bitsize */
290 false, /* pc_relative */
291 0, /* bitpos */
292 complain_overflow_bitfield, /* complain_on_overflow */
293 bfd_elf_generic_reloc, /* special_function */
294 "R_PPC64_ADDR14_BRTAKEN",/* name */
295 false, /* partial_inplace */
296 0, /* src_mask */
297 0xfffc, /* dst_mask */
298 false), /* pcrel_offset */
299
300 /* An absolute 16 bit branch, for which bit 10 should be set to
301 indicate that the branch is not expected to be taken. The lower
302 two bits must be zero. */
303 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
304 0, /* rightshift */
305 2, /* size (0 = byte, 1 = short, 2 = long) */
306 16, /* bitsize */
307 false, /* pc_relative */
308 0, /* bitpos */
309 complain_overflow_bitfield, /* complain_on_overflow */
310 bfd_elf_generic_reloc, /* special_function */
311 "R_PPC64_ADDR14_BRNTAKEN",/* name */
312 false, /* partial_inplace */
313 0, /* src_mask */
314 0xfffc, /* dst_mask */
315 false), /* pcrel_offset */
316
317 /* A relative 26 bit branch; the lower two bits must be zero. */
318 HOWTO (R_PPC64_REL24, /* type */
319 0, /* rightshift */
320 2, /* size (0 = byte, 1 = short, 2 = long) */
321 26, /* bitsize */
322 true, /* pc_relative */
323 0, /* bitpos */
324 complain_overflow_signed, /* complain_on_overflow */
325 bfd_elf_generic_reloc, /* special_function */
326 "R_PPC64_REL24", /* name */
327 false, /* partial_inplace */
328 0, /* src_mask */
329 0x3fffffc, /* dst_mask */
330 true), /* pcrel_offset */
331
332 /* A relative 16 bit branch; the lower two bits must be zero. */
333 HOWTO (R_PPC64_REL14, /* type */
334 0, /* rightshift */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
336 16, /* bitsize */
337 true, /* pc_relative */
338 0, /* bitpos */
339 complain_overflow_signed, /* complain_on_overflow */
340 bfd_elf_generic_reloc, /* special_function */
341 "R_PPC64_REL14", /* name */
342 false, /* partial_inplace */
343 0, /* src_mask */
344 0xfffc, /* dst_mask */
345 true), /* pcrel_offset */
346
347 /* A relative 16 bit branch. Bit 10 should be set to indicate that
348 the branch is expected to be taken. The lower two bits must be
349 zero. */
350 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
351 0, /* rightshift */
352 2, /* size (0 = byte, 1 = short, 2 = long) */
353 16, /* bitsize */
354 true, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC64_REL14_BRTAKEN", /* name */
359 false, /* partial_inplace */
360 0, /* src_mask */
361 0xfffc, /* dst_mask */
362 true), /* pcrel_offset */
363
364 /* A relative 16 bit branch. Bit 10 should be set to indicate that
365 the branch is not expected to be taken. The lower two bits must
366 be zero. */
367 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
368 0, /* rightshift */
369 2, /* size (0 = byte, 1 = short, 2 = long) */
370 16, /* bitsize */
371 true, /* pc_relative */
372 0, /* bitpos */
373 complain_overflow_signed, /* complain_on_overflow */
374 bfd_elf_generic_reloc, /* special_function */
375 "R_PPC64_REL14_BRNTAKEN",/* name */
376 false, /* partial_inplace */
377 0, /* src_mask */
378 0xfffc, /* dst_mask */
379 true), /* pcrel_offset */
380
381 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
382 symbol. */
383 HOWTO (R_PPC64_GOT16, /* type */
384 0, /* rightshift */
385 1, /* size (0 = byte, 1 = short, 2 = long) */
386 16, /* bitsize */
387 false, /* pc_relative */
388 0, /* bitpos */
389 complain_overflow_signed, /* complain_on_overflow */
390 bfd_elf_generic_reloc, /* special_function */
391 "R_PPC64_GOT16", /* name */
392 false, /* partial_inplace */
393 0, /* src_mask */
394 0xffff, /* dst_mask */
395 false), /* pcrel_offset */
396
397 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
398 the symbol. */
399 HOWTO (R_PPC64_GOT16_LO, /* type */
400 0, /* rightshift */
401 1, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 false, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_dont, /* complain_on_overflow */
406 bfd_elf_generic_reloc, /* special_function */
407 "R_PPC64_GOT16_LO", /* name */
408 false, /* partial_inplace */
409 0, /* src_mask */
410 0xffff, /* dst_mask */
411 false), /* pcrel_offset */
412
413 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
414 the symbol. */
415 HOWTO (R_PPC64_GOT16_HI, /* type */
416 16, /* rightshift */
417 1, /* size (0 = byte, 1 = short, 2 = long) */
418 16, /* bitsize */
419 false, /* pc_relative */
420 0, /* bitpos */
421 complain_overflow_dont,/* complain_on_overflow */
422 bfd_elf_generic_reloc, /* special_function */
423 "R_PPC64_GOT16_HI", /* name */
424 false, /* partial_inplace */
425 0, /* src_mask */
426 0xffff, /* dst_mask */
427 false), /* pcrel_offset */
428
429 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
430 the symbol. */
431 HOWTO (R_PPC64_GOT16_HA, /* type */
432 16, /* rightshift */
433 1, /* size (0 = byte, 1 = short, 2 = long) */
434 16, /* bitsize */
435 false, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_dont,/* complain_on_overflow */
438 ppc64_elf_addr16_ha_reloc, /* special_function */
439 "R_PPC64_GOT16_HA", /* name */
440 false, /* partial_inplace */
441 0, /* src_mask */
442 0xffff, /* dst_mask */
443 false), /* pcrel_offset */
444
445 /* This is used only by the dynamic linker. The symbol should exist
446 both in the object being run and in some shared library. The
447 dynamic linker copies the data addressed by the symbol from the
448 shared library into the object, because the object being
449 run has to have the data at some particular address. */
450 HOWTO (R_PPC64_COPY, /* type */
451 0, /* rightshift */
452 2, /* size (0 = byte, 1 = short, 2 = long) */
453 32, /* bitsize */
454 false, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_bitfield, /* complain_on_overflow */
457 bfd_elf_generic_reloc, /* special_function */
458 "R_PPC64_COPY", /* name */
459 false, /* partial_inplace */
460 0, /* src_mask */
461 0, /* dst_mask */
462 false), /* pcrel_offset */
463
464 /* Like R_PPC64_ADDR64, but used when setting global offset table
465 entries. */
466 HOWTO (R_PPC64_GLOB_DAT, /* type */
467 0, /* rightshift */
468 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
469 64, /* bitsize */
470 false, /* pc_relative */
471 0, /* bitpos */
472 complain_overflow_dont, /* complain_on_overflow */
473 bfd_elf_generic_reloc, /* special_function */
474 "R_PPC64_GLOB_DAT", /* name */
475 false, /* partial_inplace */
476 0, /* src_mask */
477 0xffffffffffffffff, /* dst_mask */
478 false), /* pcrel_offset */
479
480 /* Created by the link editor. Marks a procedure linkage table
481 entry for a symbol. */
482 HOWTO (R_PPC64_JMP_SLOT, /* type */
483 0, /* rightshift */
484 0, /* size (0 = byte, 1 = short, 2 = long) */
485 0, /* bitsize */
486 false, /* pc_relative */
487 0, /* bitpos */
488 complain_overflow_dont, /* complain_on_overflow */
489 bfd_elf_generic_reloc, /* special_function */
490 "R_PPC64_JMP_SLOT", /* name */
491 false, /* partial_inplace */
492 0, /* src_mask */
493 0, /* dst_mask */
494 false), /* pcrel_offset */
495
496 /* Used only by the dynamic linker. When the object is run, this
497 doubleword64 is set to the load address of the object, plus the
498 addend. */
499 HOWTO (R_PPC64_RELATIVE, /* type */
500 0, /* rightshift */
501 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
502 64, /* bitsize */
503 false, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_dont, /* complain_on_overflow */
506 bfd_elf_generic_reloc, /* special_function */
507 "R_PPC64_RELATIVE", /* name */
508 false, /* partial_inplace */
509 0, /* src_mask */
510 0xffffffffffffffff, /* dst_mask */
511 false), /* pcrel_offset */
512
513 /* Like R_PPC64_ADDR32, but may be unaligned. */
514 HOWTO (R_PPC64_UADDR32, /* type */
515 0, /* rightshift */
516 2, /* size (0 = byte, 1 = short, 2 = long) */
517 32, /* bitsize */
518 false, /* pc_relative */
519 0, /* bitpos */
520 complain_overflow_bitfield, /* complain_on_overflow */
521 bfd_elf_generic_reloc, /* special_function */
522 "R_PPC64_UADDR32", /* name */
523 false, /* partial_inplace */
524 0, /* src_mask */
525 0xffffffff, /* dst_mask */
526 false), /* pcrel_offset */
527
528 /* Like R_PPC64_ADDR16, but may be unaligned. */
529 HOWTO (R_PPC64_UADDR16, /* type */
530 0, /* rightshift */
531 1, /* size (0 = byte, 1 = short, 2 = long) */
532 16, /* bitsize */
533 false, /* pc_relative */
534 0, /* bitpos */
535 complain_overflow_bitfield, /* complain_on_overflow */
536 bfd_elf_generic_reloc, /* special_function */
537 "R_PPC64_UADDR16", /* name */
538 false, /* partial_inplace */
539 0, /* src_mask */
540 0xffff, /* dst_mask */
541 false), /* pcrel_offset */
542
543 /* 32-bit PC relative. */
544 HOWTO (R_PPC64_REL32, /* type */
545 0, /* rightshift */
546 2, /* size (0 = byte, 1 = short, 2 = long) */
547 32, /* bitsize */
548 true, /* pc_relative */
549 0, /* bitpos */
550 /* FIXME: Verify. Was complain_overflow_bitfield. */
551 complain_overflow_signed, /* complain_on_overflow */
552 bfd_elf_generic_reloc, /* special_function */
553 "R_PPC64_REL32", /* name */
554 false, /* partial_inplace */
555 0, /* src_mask */
556 0xffffffff, /* dst_mask */
557 true), /* pcrel_offset */
558
10ed1bba 559 /* 32-bit relocation to the symbol's procedure linkage table. */
5bd4f169
AM		 560 HOWTO (R_PPC64_PLT32, /* type */
561 0, /* rightshift */
562 2, /* size (0 = byte, 1 = short, 2 = long) */
563 32, /* bitsize */
564 false, /* pc_relative */
565 0, /* bitpos */
566 complain_overflow_bitfield, /* complain_on_overflow */
567 bfd_elf_generic_reloc, /* special_function */
568 "R_PPC64_PLT32", /* name */
569 false, /* partial_inplace */
570 0, /* src_mask */
571 0, /* dst_mask */
572 false), /* pcrel_offset */
573
574 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
575 FIXME: R_PPC64_PLTREL32 not supported. */
576 HOWTO (R_PPC64_PLTREL32, /* type */
577 0, /* rightshift */
578 2, /* size (0 = byte, 1 = short, 2 = long) */
579 32, /* bitsize */
580 true, /* pc_relative */
581 0, /* bitpos */
582 complain_overflow_signed, /* complain_on_overflow */
583 bfd_elf_generic_reloc, /* special_function */
584 "R_PPC64_PLTREL32", /* name */
585 false, /* partial_inplace */
586 0, /* src_mask */
587 0, /* dst_mask */
588 true), /* pcrel_offset */
589
590 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
591 the symbol. */
592 HOWTO (R_PPC64_PLT16_LO, /* type */
593 0, /* rightshift */
594 1, /* size (0 = byte, 1 = short, 2 = long) */
595 16, /* bitsize */
596 false, /* pc_relative */
597 0, /* bitpos */
598 complain_overflow_dont, /* complain_on_overflow */
599 bfd_elf_generic_reloc, /* special_function */
600 "R_PPC64_PLT16_LO", /* name */
601 false, /* partial_inplace */
602 0, /* src_mask */
603 0xffff, /* dst_mask */
604 false), /* pcrel_offset */
605
606 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
607 the symbol. */
608 HOWTO (R_PPC64_PLT16_HI, /* type */
609 16, /* rightshift */
610 1, /* size (0 = byte, 1 = short, 2 = long) */
611 16, /* bitsize */
612 false, /* pc_relative */
613 0, /* bitpos */
614 complain_overflow_dont, /* complain_on_overflow */
615 bfd_elf_generic_reloc, /* special_function */
616 "R_PPC64_PLT16_HI", /* name */
617 false, /* partial_inplace */
618 0, /* src_mask */
619 0xffff, /* dst_mask */
620 false), /* pcrel_offset */
621
622 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
623 the symbol. */
624 HOWTO (R_PPC64_PLT16_HA, /* type */
625 16, /* rightshift */
626 1, /* size (0 = byte, 1 = short, 2 = long) */
627 16, /* bitsize */
628 false, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_dont, /* complain_on_overflow */
631 ppc64_elf_addr16_ha_reloc, /* special_function */
632 "R_PPC64_PLT16_HA", /* name */
633 false, /* partial_inplace */
634 0, /* src_mask */
635 0xffff, /* dst_mask */
636 false), /* pcrel_offset */
637
638 /* 32-bit section relative relocation. */
639 /* FIXME: Verify R_PPC64_SECTOFF. Seems strange with size=2 and
640 dst_mask=0. */
641 HOWTO (R_PPC64_SECTOFF, /* type */
642 0, /* rightshift */
643 2, /* size (0 = byte, 1 = short, 2 = long) */
644 32, /* bitsize */
645 true, /* pc_relative */
646 0, /* bitpos */
647 complain_overflow_bitfield, /* complain_on_overflow */
648 bfd_elf_generic_reloc, /* special_function */
649 "R_PPC64_SECTOFF", /* name */
650 false, /* partial_inplace */
651 0, /* src_mask */
652 0, /* dst_mask */
653 true), /* pcrel_offset */
654
655 /* 16-bit lower half section relative relocation. */
656 HOWTO (R_PPC64_SECTOFF_LO, /* type */
657 0, /* rightshift */
658 1, /* size (0 = byte, 1 = short, 2 = long) */
659 16, /* bitsize */
660 false, /* pc_relative */
661 0, /* bitpos */
662 complain_overflow_dont, /* complain_on_overflow */
663 bfd_elf_generic_reloc, /* special_function */
664 "R_PPC64_SECTOFF_LO", /* name */
665 false, /* partial_inplace */
666 0, /* src_mask */
667 0xffff, /* dst_mask */
668 false), /* pcrel_offset */
669
670 /* 16-bit upper half section relative relocation. */
671 HOWTO (R_PPC64_SECTOFF_HI, /* type */
672 16, /* rightshift */
673 1, /* size (0 = byte, 1 = short, 2 = long) */
674 16, /* bitsize */
675 false, /* pc_relative */
676 0, /* bitpos */
677 complain_overflow_dont, /* complain_on_overflow */
678 bfd_elf_generic_reloc, /* special_function */
679 "R_PPC64_SECTOFF_HI", /* name */
680 false, /* partial_inplace */
681 0, /* src_mask */
682 0xffff, /* dst_mask */
683 false), /* pcrel_offset */
684
685 /* 16-bit upper half adjusted section relative relocation. */
686 HOWTO (R_PPC64_SECTOFF_HA, /* type */
687 16, /* rightshift */
688 1, /* size (0 = byte, 1 = short, 2 = long) */
689 16, /* bitsize */
690 false, /* pc_relative */
691 0, /* bitpos */
692 complain_overflow_dont, /* complain_on_overflow */
693 ppc64_elf_addr16_ha_reloc, /* special_function */
694 "R_PPC64_SECTOFF_HA", /* name */
695 false, /* partial_inplace */
696 0, /* src_mask */
697 0xffff, /* dst_mask */
698 false), /* pcrel_offset */
699
700 /* Like R_PPC64_REL24 without touching the two least significant
701 bits. */
702 /* FIXME: Verify R_PPC64_ADDR30. */
703 HOWTO (R_PPC64_ADDR30, /* type */
704 2, /* rightshift */
705 2, /* size (0 = byte, 1 = short, 2 = long) */
706 30, /* bitsize */
707 true, /* pc_relative */
708 0, /* bitpos */
709 complain_overflow_dont, /* complain_on_overflow */
710 bfd_elf_generic_reloc, /* special_function */
711 "R_PPC64_ADDR30", /* name */
712 false, /* partial_inplace */
713 0, /* src_mask */
714 0xfffffffc, /* dst_mask */
715 true), /* pcrel_offset */
716
717 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
718
719 /* A standard 64-bit relocation. */
720 HOWTO (R_PPC64_ADDR64, /* type */
721 0, /* rightshift */
722 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
723 64, /* bitsize */
724 false, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_dont, /* complain_on_overflow */
727 bfd_elf_generic_reloc, /* special_function */
728 "R_PPC64_ADDR64", /* name */
729 false, /* partial_inplace */
730 0, /* src_mask */
731 0xffffffffffffffff, /* dst_mask */
732 false), /* pcrel_offset */
733
734 /* The bits 32-47 of an address. */
735 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
736 32, /* rightshift */
737 1, /* size (0 = byte, 1 = short, 2 = long) */
738 16, /* bitsize */
739 false, /* pc_relative */
740 0, /* bitpos */
741 complain_overflow_dont, /* complain_on_overflow */
742 bfd_elf_generic_reloc, /* special_function */
743 "R_PPC64_ADDR16_HIGHER", /* name */
744 false, /* partial_inplace */
745 0, /* src_mask */
746 0xffff, /* dst_mask */
747 false), /* pcrel_offset */
748
749 /* The bits 32-47 of an address, plus 1 if the contents of the low
750 16 bits, treated as a signed number, is negative. */
751 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
752 32, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 false, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_dont, /* complain_on_overflow */
758 ppc64_elf_addr16_ha_reloc, /* special_function */
759 "R_PPC64_ADDR16_HIGHERA", /* name */
760 false, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 false), /* pcrel_offset */
764
765 /* The bits 48-63 of an address. */
766 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
767 48, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 false, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 bfd_elf_generic_reloc, /* special_function */
774 "R_PPC64_ADDR16_HIGHEST", /* name */
775 false, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 false), /* pcrel_offset */
779
780 /* The bits 48-63 of an address, plus 1 if the contents of the low
781 16 bits, treated as a signed number, is negative. */
782 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
783 48, /* rightshift */
784 1, /* size (0 = byte, 1 = short, 2 = long) */
785 16, /* bitsize */
786 false, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_dont, /* complain_on_overflow */
789 ppc64_elf_addr16_ha_reloc, /* special_function */
790 "R_PPC64_ADDR16_HIGHESTA", /* name */
791 false, /* partial_inplace */
792 0, /* src_mask */
793 0xffff, /* dst_mask */
794 false), /* pcrel_offset */
795
796 /* Like ADDR64, but may be unaligned. */
797 HOWTO (R_PPC64_UADDR64, /* type */
798 0, /* rightshift */
799 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
800 64, /* bitsize */
801 false, /* pc_relative */
802 0, /* bitpos */
803 complain_overflow_dont, /* complain_on_overflow */
804 bfd_elf_generic_reloc, /* special_function */
805 "R_PPC64_UADDR64", /* name */
806 false, /* partial_inplace */
807 0, /* src_mask */
808 0xffffffffffffffff, /* dst_mask */
809 false), /* pcrel_offset */
810
811 /* 64-bit relative relocation. */
812 HOWTO (R_PPC64_REL64, /* type */
813 0, /* rightshift */
814 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
815 64, /* bitsize */
816 true, /* pc_relative */
817 0, /* bitpos */
818 complain_overflow_dont, /* complain_on_overflow */
819 bfd_elf_generic_reloc, /* special_function */
820 "R_PPC64_REL64", /* name */
821 false, /* partial_inplace */
822 0, /* src_mask */
823 0xffffffffffffffff, /* dst_mask */
824 true), /* pcrel_offset */
825
826 /* 64-bit relocation to the symbol's procedure linkage table. */
5bd4f169
AM		 827 HOWTO (R_PPC64_PLT64, /* type */
828 0, /* rightshift */
829 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
830 64, /* bitsize */
831 false, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 bfd_elf_generic_reloc, /* special_function */
835 "R_PPC64_PLT64", /* name */
836 false, /* partial_inplace */
837 0, /* src_mask */
838 0, /* dst_mask */
839 false), /* pcrel_offset */
840
841 /* 64-bit PC relative relocation to the symbol's procedure linkage
842 table. */
843 /* FIXME: R_PPC64_PLTREL64 not supported. */
844 HOWTO (R_PPC64_PLTREL64, /* type */
845 0, /* rightshift */
846 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
847 64, /* bitsize */
848 true, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_dont, /* complain_on_overflow */
851 bfd_elf_generic_reloc, /* special_function */
852 "R_PPC64_PLTREL64", /* name */
853 false, /* partial_inplace */
854 0, /* src_mask */
855 0, /* dst_mask */
856 true), /* pcrel_offset */
857
858 /* 16 bit TOC-relative relocation. */
859
860 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
861 HOWTO (R_PPC64_TOC16, /* type */
862 0, /* rightshift */
863 1, /* size (0 = byte, 1 = short, 2 = long) */
864 16, /* bitsize */
865 false, /* pc_relative */
866 0, /* bitpos */
867 complain_overflow_signed, /* complain_on_overflow */
868 bfd_elf_generic_reloc, /* special_function */
869 "R_PPC64_TOC16", /* name */
870 false, /* partial_inplace */
871 0, /* src_mask */
872 0xffff, /* dst_mask */
873 false), /* pcrel_offset */
874
875 /* 16 bit TOC-relative relocation without overflow. */
876
877 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
878 HOWTO (R_PPC64_TOC16_LO, /* type */
879 0, /* rightshift */
880 1, /* size (0 = byte, 1 = short, 2 = long) */
881 16, /* bitsize */
882 false, /* pc_relative */
883 0, /* bitpos */
884 complain_overflow_dont, /* complain_on_overflow */
885 bfd_elf_generic_reloc, /* special_function */
886 "R_PPC64_TOC16_LO", /* name */
887 false, /* partial_inplace */
888 0, /* src_mask */
889 0xffff, /* dst_mask */
890 false), /* pcrel_offset */
891
892 /* 16 bit TOC-relative relocation, high 16 bits. */
893
894 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
895 HOWTO (R_PPC64_TOC16_HI, /* type */
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 false, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 bfd_elf_generic_reloc, /* special_function */
903 "R_PPC64_TOC16_HI", /* name */
904 false, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 false), /* pcrel_offset */
908
909 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
910 contents of the low 16 bits, treated as a signed number, is
911 negative. */
912
913 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
914 HOWTO (R_PPC64_TOC16_HA, /* type */
915 16, /* rightshift */
916 1, /* size (0 = byte, 1 = short, 2 = long) */
917 16, /* bitsize */
918 false, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_dont, /* complain_on_overflow */
921 ppc64_elf_addr16_ha_reloc, /* special_function */
922 "R_PPC64_TOC16_HA", /* name */
923 false, /* partial_inplace */
924 0, /* src_mask */
925 0xffff, /* dst_mask */
926 false), /* pcrel_offset */
927
928 /* 64-bit relocation; insert value of TOC base (.TOC.). */
929
930 /* R_PPC64_TOC 51 doubleword64 .TOC. */
931 HOWTO (R_PPC64_TOC, /* type */
932 0, /* rightshift */
933 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
934 64, /* bitsize */
935 false, /* pc_relative */
936 0, /* bitpos */
937 complain_overflow_bitfield, /* complain_on_overflow */
938 bfd_elf_generic_reloc, /* special_function */
939 "R_PPC64_TOC", /* name */
940 false, /* partial_inplace */
941 0, /* src_mask */
942 0xffffffffffffffff, /* dst_mask */
943 false), /* pcrel_offset */
944
945 /* Like R_PPC64_GOT16, but also informs the link editor that the
946 value to relocate may (!) refer to a PLT entry which the link
947 editor (a) may replace with the symbol value. If the link editor
948 is unable to fully resolve the symbol, it may (b) create a PLT
949 entry and store the address to the new PLT entry in the GOT.
950 This permits lazy resolution of function symbols at run time.
951 The link editor may also skip all of this and just (c) emit a
952 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
953 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
954 HOWTO (R_PPC64_PLTGOT16, /* type */
955 0, /* rightshift */
956 1, /* size (0 = byte, 1 = short, 2 = long) */
957 16, /* bitsize */
958 false, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_signed, /* complain_on_overflow */
961 bfd_elf_generic_reloc, /* special_function */
962 "R_PPC64_PLTGOT16", /* name */
963 false, /* partial_inplace */
964 0, /* src_mask */
965 0xffff, /* dst_mask */
966 false), /* pcrel_offset */
967
968 /* Like R_PPC64_PLTGOT16, but without overflow. */
969 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
970 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
971 0, /* rightshift */
972 1, /* size (0 = byte, 1 = short, 2 = long) */
973 16, /* bitsize */
974 false, /* pc_relative */
975 0, /* bitpos */
976 complain_overflow_dont, /* complain_on_overflow */
977 bfd_elf_generic_reloc, /* special_function */
978 "R_PPC64_PLTGOT16_LO", /* name */
979 false, /* partial_inplace */
980 0, /* src_mask */
981 0xffff, /* dst_mask */
982 false), /* pcrel_offset */
983
984 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
985 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
986 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
987 16, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 false, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 bfd_elf_generic_reloc, /* special_function */
994 "R_PPC64_PLTGOT16_HI", /* name */
995 false, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 false), /* pcrel_offset */
999
1000 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1001 1 if the contents of the low 16 bits, treated as a signed number,
1002 is negative. */
1003 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1004 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1005 16, /* rightshift */
1006 1, /* size (0 = byte, 1 = short, 2 = long) */
1007 16, /* bitsize */
1008 false, /* pc_relative */
1009 0, /* bitpos */
1010 complain_overflow_dont,/* complain_on_overflow */
1011 ppc64_elf_addr16_ha_reloc, /* special_function */
1012 "R_PPC64_PLTGOT16_HA", /* name */
1013 false, /* partial_inplace */
1014 0, /* src_mask */
1015 0xffff, /* dst_mask */
1016 false), /* pcrel_offset */
1017
1018 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1019 HOWTO (R_PPC64_ADDR16_DS, /* type */
1020 0, /* rightshift */
1021 1, /* size (0 = byte, 1 = short, 2 = long) */
1022 16, /* bitsize */
1023 false, /* pc_relative */
1024 0, /* bitpos */
1025 complain_overflow_bitfield, /* complain_on_overflow */
1026 bfd_elf_generic_reloc, /* special_function */
1027 "R_PPC64_ADDR16_DS", /* name */
1028 false, /* partial_inplace */
1029 0, /* src_mask */
1030 0xfffc, /* dst_mask */
1031 false), /* pcrel_offset */
1032
1033 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1034 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1035 0, /* rightshift */
1036 1, /* size (0 = byte, 1 = short, 2 = long) */
1037 16, /* bitsize */
1038 false, /* pc_relative */
1039 0, /* bitpos */
1040 complain_overflow_dont,/* complain_on_overflow */
1041 bfd_elf_generic_reloc, /* special_function */
1042 "R_PPC64_ADDR16_LO_DS",/* name */
1043 false, /* partial_inplace */
1044 0, /* src_mask */
1045 0xfffc, /* dst_mask */
1046 false), /* pcrel_offset */
1047
1048 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1049 HOWTO (R_PPC64_GOT16_DS, /* type */
1050 0, /* rightshift */
1051 1, /* size (0 = byte, 1 = short, 2 = long) */
1052 16, /* bitsize */
1053 false, /* pc_relative */
1054 0, /* bitpos */
1055 complain_overflow_signed, /* complain_on_overflow */
1056 bfd_elf_generic_reloc, /* special_function */
1057 "R_PPC64_GOT16_DS", /* name */
1058 false, /* partial_inplace */
1059 0, /* src_mask */
1060 0xfffc, /* dst_mask */
1061 false), /* pcrel_offset */
1062
1063 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1064 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1065 0, /* rightshift */
1066 1, /* size (0 = byte, 1 = short, 2 = long) */
1067 16, /* bitsize */
1068 false, /* pc_relative */
1069 0, /* bitpos */
1070 complain_overflow_dont, /* complain_on_overflow */
1071 bfd_elf_generic_reloc, /* special_function */
1072 "R_PPC64_GOT16_LO_DS", /* name */
1073 false, /* partial_inplace */
1074 0, /* src_mask */
1075 0xfffc, /* dst_mask */
1076 false), /* pcrel_offset */
1077
1078 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1079 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1080 0, /* rightshift */
1081 1, /* size (0 = byte, 1 = short, 2 = long) */
1082 16, /* bitsize */
1083 false, /* pc_relative */
1084 0, /* bitpos */
1085 complain_overflow_dont, /* complain_on_overflow */
1086 bfd_elf_generic_reloc, /* special_function */
1087 "R_PPC64_PLT16_LO_DS", /* name */
1088 false, /* partial_inplace */
1089 0, /* src_mask */
1090 0xfffc, /* dst_mask */
1091 false), /* pcrel_offset */
1092
1093 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1094 /* FIXME: Verify R_PPC64_SECTOFF. Seems strange with size=2 and
1095 dst_mask=0. */
1096 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1097 0, /* rightshift */
1098 2, /* size (0 = byte, 1 = short, 2 = long) */
1099 32, /* bitsize */
1100 true, /* pc_relative */
1101 0, /* bitpos */
1102 complain_overflow_bitfield, /* complain_on_overflow */
1103 bfd_elf_generic_reloc, /* special_function */
1104 "R_PPC64_SECTOFF_DS", /* name */
1105 false, /* partial_inplace */
1106 0, /* src_mask */
1107 0, /* dst_mask */
1108 true), /* pcrel_offset */
1109
1110 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1111 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 false, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_dont, /* complain_on_overflow */
1118 bfd_elf_generic_reloc, /* special_function */
1119 "R_PPC64_SECTOFF_LO_DS",/* name */
1120 false, /* partial_inplace */
1121 0, /* src_mask */
1122 0xfffc, /* dst_mask */
1123 false), /* pcrel_offset */
1124
1125 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1126 HOWTO (R_PPC64_TOC16_DS, /* type */
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 false, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_signed, /* complain_on_overflow */
1133 bfd_elf_generic_reloc, /* special_function */
1134 "R_PPC64_TOC16_DS", /* name */
1135 false, /* partial_inplace */
1136 0, /* src_mask */
1137 0xfffc, /* dst_mask */
1138 false), /* pcrel_offset */
1139
1140 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1141 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1142 0, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 false, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 bfd_elf_generic_reloc, /* special_function */
1149 "R_PPC64_TOC16_LO_DS", /* name */
1150 false, /* partial_inplace */
1151 0, /* src_mask */
1152 0xfffc, /* dst_mask */
1153 false), /* pcrel_offset */
1154
1155 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1156 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1157 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1158 0, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 false, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_signed, /* complain_on_overflow */
1164 bfd_elf_generic_reloc, /* special_function */
1165 "R_PPC64_PLTGOT16_DS", /* name */
1166 false, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 false), /* pcrel_offset */
1170
1171 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1172 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1173 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1174 0, /* rightshift */
1175 1, /* size (0 = byte, 1 = short, 2 = long) */
1176 16, /* bitsize */
1177 false, /* pc_relative */
1178 0, /* bitpos */
1179 complain_overflow_dont, /* complain_on_overflow */
1180 bfd_elf_generic_reloc, /* special_function */
1181 "R_PPC64_PLTGOT16_LO_DS",/* name */
1182 false, /* partial_inplace */
1183 0, /* src_mask */
1184 0xfffc, /* dst_mask */
1185 false), /* pcrel_offset */
1186
1187 /* GNU extension to record C++ vtable hierarchy. */
1188 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1189 0, /* rightshift */
1190 0, /* size (0 = byte, 1 = short, 2 = long) */
1191 0, /* bitsize */
1192 false, /* pc_relative */
1193 0, /* bitpos */
1194 complain_overflow_dont, /* complain_on_overflow */
1195 NULL, /* special_function */
1196 "R_PPC64_GNU_VTINHERIT", /* name */
1197 false, /* partial_inplace */
1198 0, /* src_mask */
1199 0, /* dst_mask */
1200 false), /* pcrel_offset */
1201
1202 /* GNU extension to record C++ vtable member usage. */
1203 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1204 0, /* rightshift */
1205 0, /* size (0 = byte, 1 = short, 2 = long) */
1206 0, /* bitsize */
1207 false, /* pc_relative */
1208 0, /* bitpos */
1209 complain_overflow_dont, /* complain_on_overflow */
1210 NULL, /* special_function */
1211 "R_PPC64_GNU_VTENTRY", /* name */
1212 false, /* partial_inplace */
1213 0, /* src_mask */
1214 0, /* dst_mask */
1215 false), /* pcrel_offset */
1216};
1217
1218\f
1219/* Initialize the ppc64_elf_howto_table, so that linear accesses can
1220 be done. */
1221
1222static void
1223ppc_howto_init ()
1224{
1225 unsigned int i, type;
1226
1227 for (i = 0;
1228 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1229 i++)
1230 {
1231 type = ppc64_elf_howto_raw[i].type;
1232 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1233 / sizeof (ppc64_elf_howto_table[0])));
1234 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1235 }
1236}
1237
1238static reloc_howto_type *
1239ppc64_elf_reloc_type_lookup (abfd, code)
1240 bfd *abfd ATTRIBUTE_UNUSED;
1241 bfd_reloc_code_real_type code;
1242{
1243 enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE;
1244
1245 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1246 /* Initialize howto table if needed. */
1247 ppc_howto_init ();
1248
1249 switch ((int) code)
1250 {
1251 default:
1252 return (reloc_howto_type *) NULL;
1253
1254 case BFD_RELOC_NONE: ppc_reloc = R_PPC64_NONE;
1255 break;
1256 case BFD_RELOC_32: ppc_reloc = R_PPC64_ADDR32;
1257 break;
1258 case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC64_ADDR24;
1259 break;
1260 case BFD_RELOC_16: ppc_reloc = R_PPC64_ADDR16;
1261 break;
1262 case BFD_RELOC_LO16: ppc_reloc = R_PPC64_ADDR16_LO;
1263 break;
1264 case BFD_RELOC_HI16: ppc_reloc = R_PPC64_ADDR16_HI;
1265 break;
1266 case BFD_RELOC_HI16_S: ppc_reloc = R_PPC64_ADDR16_HA;
1267 break;
1268 case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC64_ADDR14;
1269 break;
1270 case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC64_ADDR14_BRTAKEN;
1271 break;
1272 case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC64_ADDR14_BRNTAKEN;
1273 break;
1274 case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC64_REL24;
1275 break;
1276 case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC64_REL14;
1277 break;
1278 case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC64_REL14_BRTAKEN;
1279 break;
1280 case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC64_REL14_BRNTAKEN;
1281 break;
1282 case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC64_GOT16;
1283 break;
1284 case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC64_GOT16_LO;
1285 break;
1286 case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC64_GOT16_HI;
1287 break;
1288 case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC64_GOT16_HA;
1289 break;
1290 case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC64_COPY;
1291 break;
1292 case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC64_GLOB_DAT;
1293 break;
1294 case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC64_REL32;
1295 break;
1296 case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC64_PLT32;
1297 break;
1298 case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL32;
1299 break;
1300 case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC64_PLT16_LO;
1301 break;
1302 case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC64_PLT16_HI;
1303 break;
1304 case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC64_PLT16_HA;
1305 break;
1306 case BFD_RELOC_32_BASEREL: ppc_reloc = R_PPC64_SECTOFF;
1307 break;
1308 case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_LO;
1309 break;
1310 case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HI;
1311 break;
1312 case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HA;
1313 break;
10ed1bba 1314 case BFD_RELOC_CTOR: ppc_reloc = R_PPC64_ADDR64;
5bd4f169
AM		 1315 break;
1316 case BFD_RELOC_64: ppc_reloc = R_PPC64_ADDR64;
1317 break;
1318 case BFD_RELOC_PPC64_HIGHER: ppc_reloc = R_PPC64_ADDR16_HIGHER;
1319 break;
1320 case BFD_RELOC_PPC64_HIGHER_S: ppc_reloc = R_PPC64_ADDR16_HIGHERA;
1321 break;
1322 case BFD_RELOC_PPC64_HIGHEST: ppc_reloc = R_PPC64_ADDR16_HIGHEST;
1323 break;
1324 case BFD_RELOC_PPC64_HIGHEST_S: ppc_reloc = R_PPC64_ADDR16_HIGHESTA;
1325 break;
1326 case BFD_RELOC_64_PCREL: ppc_reloc = R_PPC64_REL64;
1327 break;
1328 case BFD_RELOC_64_PLTOFF: ppc_reloc = R_PPC64_PLT64;
1329 break;
1330 case BFD_RELOC_64_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL64;
1331 break;
1332 case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC64_TOC16;
1333 break;
1334 case BFD_RELOC_PPC64_TOC16_LO: ppc_reloc = R_PPC64_TOC16_LO;
1335 break;
1336 case BFD_RELOC_PPC64_TOC16_HI: ppc_reloc = R_PPC64_TOC16_HI;
1337 break;
1338 case BFD_RELOC_PPC64_TOC16_HA: ppc_reloc = R_PPC64_TOC16_HA;
1339 break;
1340 case BFD_RELOC_PPC64_TOC: ppc_reloc = R_PPC64_TOC;
1341 break;
1342 case BFD_RELOC_PPC64_PLTGOT16: ppc_reloc = R_PPC64_PLTGOT16;
1343 break;
1344 case BFD_RELOC_PPC64_PLTGOT16_LO: ppc_reloc = R_PPC64_PLTGOT16_LO;
1345 break;
1346 case BFD_RELOC_PPC64_PLTGOT16_HI: ppc_reloc = R_PPC64_PLTGOT16_HI;
1347 break;
1348 case BFD_RELOC_PPC64_PLTGOT16_HA: ppc_reloc = R_PPC64_PLTGOT16_HA;
1349 break;
1350 case BFD_RELOC_PPC64_ADDR16_DS: ppc_reloc = R_PPC64_ADDR16_DS;
1351 break;
1352 case BFD_RELOC_PPC64_ADDR16_LO_DS: ppc_reloc = R_PPC64_ADDR16_LO_DS;
1353 break;
1354 case BFD_RELOC_PPC64_GOT16_DS: ppc_reloc = R_PPC64_GOT16_DS;
1355 break;
1356 case BFD_RELOC_PPC64_GOT16_LO_DS: ppc_reloc = R_PPC64_GOT16_LO_DS;
1357 break;
1358 case BFD_RELOC_PPC64_PLT16_LO_DS: ppc_reloc = R_PPC64_PLT16_LO_DS;
1359 break;
1360 case BFD_RELOC_PPC64_SECTOFF_DS: ppc_reloc = R_PPC64_SECTOFF_DS;
1361 break;
1362 case BFD_RELOC_PPC64_SECTOFF_LO_DS: ppc_reloc = R_PPC64_SECTOFF_LO_DS;
1363 break;
1364 case BFD_RELOC_PPC64_TOC16_DS: ppc_reloc = R_PPC64_TOC16_DS;
1365 break;
1366 case BFD_RELOC_PPC64_TOC16_LO_DS: ppc_reloc = R_PPC64_TOC16_LO_DS;
1367 break;
1368 case BFD_RELOC_PPC64_PLTGOT16_DS: ppc_reloc = R_PPC64_PLTGOT16_DS;
1369 break;
1370 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: ppc_reloc = R_PPC64_PLTGOT16_LO_DS;
1371 break;
1372 case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC64_GNU_VTINHERIT;
1373 break;
1374 case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC64_GNU_VTENTRY;
1375 break;
1376 }
1377
1378 return ppc64_elf_howto_table[(int) ppc_reloc];
1379};
1380
1381/* Set the howto pointer for a PowerPC ELF reloc. */
1382
1383static void
1384ppc64_elf_info_to_howto (abfd, cache_ptr, dst)
1385 bfd *abfd ATTRIBUTE_UNUSED;
1386 arelent *cache_ptr;
1387 Elf64_Internal_Rela *dst;
1388{
65f38f15
AM		 1389 unsigned int type;
1390
5bd4f169
AM		 1391 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1392 /* Initialize howto table if needed. */
1393 ppc_howto_init ();
1394
65f38f15
AM		 1395 type = ELF64_R_TYPE (dst->r_info);
1396 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1397 / sizeof (ppc64_elf_howto_table[0])));
1398 cache_ptr->howto = ppc64_elf_howto_table[type];
5bd4f169
AM		 1399}
1400
65f38f15 1401/* Handle the R_PPC_ADDR16_HA and similar relocs. */
5bd4f169
AM		 1402
1403static bfd_reloc_status_type
1404ppc64_elf_addr16_ha_reloc (abfd, reloc_entry, symbol, data, input_section,
1405 output_bfd, error_message)
1406 bfd *abfd ATTRIBUTE_UNUSED;
1407 arelent *reloc_entry;
1408 asymbol *symbol;
1409 PTR data ATTRIBUTE_UNUSED;
1410 asection *input_section;
1411 bfd *output_bfd;
1412 char **error_message ATTRIBUTE_UNUSED;
1413{
1414 bfd_vma relocation;
1415
1416 if (output_bfd != NULL)
1417 {
1418 reloc_entry->address += input_section->output_offset;
1419 return bfd_reloc_ok;
1420 }
1421
1422 if (reloc_entry->address > input_section->_cooked_size)
1423 return bfd_reloc_outofrange;
1424
1425 if (bfd_is_com_section (symbol->section))
1426 relocation = 0;
1427 else
1428 relocation = symbol->value;
1429
1430 relocation += symbol->section->output_section->vma;
1431 relocation += symbol->section->output_offset;
1432 relocation += reloc_entry->addend;
1433
1434 reloc_entry->addend += (relocation & 0x8000) << 1;
1435
1436 return bfd_reloc_continue;
1437}
1438
1439/* Function to set whether a module needs the -mrelocatable bit set. */
1440
1441static boolean
1442ppc64_elf_set_private_flags (abfd, flags)
1443 bfd *abfd;
1444 flagword flags;
1445{
1446 BFD_ASSERT (!elf_flags_init (abfd)
1447 || elf_elfheader (abfd)->e_flags == flags);
1448
1449 elf_elfheader (abfd)->e_flags = flags;
1450 elf_flags_init (abfd) = true;
1451 return true;
1452}
1453
5bd4f169
AM		 1454/* Merge backend specific data from an object file to the output
1455 object file when linking. */
1456static boolean
1457ppc64_elf_merge_private_bfd_data (ibfd, obfd)
1458 bfd *ibfd;
1459 bfd *obfd;
1460{
1461 flagword old_flags;
1462 flagword new_flags;
1463 boolean error;
1464
1465 /* Check if we have the same endianess. */
1466 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
1467 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
1468 {
1469 const char *msg;
1470
1471 if (bfd_big_endian (ibfd))
1472 msg = _("%s: compiled for a big endian system and target is little endian");
1473 else
1474 msg = _("%s: compiled for a little endian system and target is big endian");
1475
8f615d07 1476 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
5bd4f169
AM		 1477
1478 bfd_set_error (bfd_error_wrong_format);
1479 return false;
1480 }
1481
1482 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1483 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1484 return true;
1485
1486 new_flags = elf_elfheader (ibfd)->e_flags;
1487 old_flags = elf_elfheader (obfd)->e_flags;
1488 if (!elf_flags_init (obfd))
1489 {
1490 /* First call, no flags set. */
1491 elf_flags_init (obfd) = true;
1492 elf_elfheader (obfd)->e_flags = new_flags;
1493 }
1494
1495 else if (new_flags == old_flags)
1496 /* Compatible flags are ok. */
1497 ;
1498
1499 else
1500 {
1501 /* Incompatible flags. Warn about -mrelocatable mismatch.
1502 Allow -mrelocatable-lib to be linked with either. */
1503 error = false;
1504 if ((new_flags & EF_PPC_RELOCATABLE) != 0
1505 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
1506 {
1507 error = true;
1508 (*_bfd_error_handler)
1509 (_("%s: compiled with -mrelocatable and linked with modules compiled normally"),
8f615d07 1510 bfd_archive_filename (ibfd));
5bd4f169
AM		 1511 }
1512 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
1513 && (old_flags & EF_PPC_RELOCATABLE) != 0)
1514 {
1515 error = true;
1516 (*_bfd_error_handler)
1517 (_("%s: compiled normally and linked with modules compiled with -mrelocatable"),
8f615d07 1518 bfd_archive_filename (ibfd));
5bd4f169
AM		 1519 }
1520
1521 /* The output is -mrelocatable-lib iff both the input files are. */
1522 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
1523 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
1524
1525 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
1526 but each input file is either -mrelocatable or -mrelocatable-lib. */
1527 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
1528 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
1529 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
1530 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
1531
1532 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit
1533 if any module uses it. */
1534 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
1535
1536 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
1537 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
1538
1539 /* Warn about any other mismatches. */
1540 if (new_flags != old_flags)
1541 {
1542 error = true;
1543 (*_bfd_error_handler)
1544 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
8f615d07 1545 bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
5bd4f169
AM		 1546 }
1547
1548 if (error)
1549 {
1550 bfd_set_error (bfd_error_bad_value);
1551 return false;
1552 }
1553 }
1554
1555 return true;
1556}
1557
1558/* Handle a PowerPC specific section when reading an object file. This
1559 is called when elfcode.h finds a section with an unknown type. */
1560
1561static boolean
1562ppc64_elf_section_from_shdr (abfd, hdr, name)
1563 bfd *abfd;
1564 Elf64_Internal_Shdr *hdr;
1565 char *name;
1566{
1567 asection *newsect;
1568 flagword flags;
1569
1570 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1571 return false;
1572
1573 newsect = hdr->bfd_section;
1574 flags = bfd_get_section_flags (abfd, newsect);
1575 if (hdr->sh_flags & SHF_EXCLUDE)
1576 flags |= SEC_EXCLUDE;
1577
1578 if (hdr->sh_type == SHT_ORDERED)
1579 flags |= SEC_SORT_ENTRIES;
1580
1581 bfd_set_section_flags (abfd, newsect, flags);
1582 return true;
1583}
1584\f
65f38f15
AM		 1585/* The following functions are specific to the ELF linker, while
1586 functions above are used generally. Those named ppc64_elf_* are
1587 called by the main ELF linker code. They appear in this file more
1588 or less in the order in which they are called. eg.
1589 ppc64_elf_check_relocs is called early in the link process,
1590 ppc64_elf_finish_dynamic_sections is one of the last functions
e86ce104
AM		 1591 called.
1592
1593 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
1594 functions have both a function code symbol and a function descriptor
1595 symbol. A call to foo in a relocatable object file looks like:
1596
1597 . .text
1598 . x:
1599 . bl .foo
1600 . nop
1601
1602 The function definition in another object file might be:
1603
1604 . .section .opd
1605 . foo: .quad .foo
1606 . .quad .TOC.@tocbase
1607 . .quad 0
1608 .
1609 . .text
1610 . .foo: blr
1611
1612 When the linker resolves the call during a static link, the branch
1613 unsurprisingly just goes to .foo and the .opd information is unused.
1614 If the function definition is in a shared library, things are a little
1615 different: The call goes via a plt call stub, the opd information gets
1616 copied to the plt, and the linker patches the nop.
1617
1618 . x:
1619 . bl .foo_stub
1620 . ld 2,40(1)
1621 .
1622 .
1623 . .foo_stub:
1624 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
1625 . addi 12,12,Lfoo@toc@l # is slightly optimised, but
1626 . std 2,40(1) # this is the general idea
1627 . ld 11,0(12)
1628 . ld 2,8(12)
1629 . mtctr 11
1630 . ld 11,16(12)
1631 . bctr
1632 .
1633 . .section .plt
1634 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
1635
1636 The "reloc ()" notation is supposed to indicate that the linker emits
1637 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
1638 copying.
1639
1640 What are the difficulties here? Well, firstly, the relocations
1641 examined by the linker in check_relocs are against the function code
1642 sym .foo, while the dynamic relocation in the plt is emitted against
1643 the function descriptor symbol, foo. Somewhere along the line, we need
1644 to carefully copy dynamic link information from one symbol to the other.
1645 Secondly, the generic part of the elf linker will make .foo a dynamic
1646 symbol as is normal for most other backends. We need foo dynamic
1647 instead, at least for an application final link. However, when
1648 creating a shared library containing foo, we need to have both symbols
1649 dynamic so that references to .foo are satisfied during the early
1650 stages of linking. Otherwise the linker might decide to pull in a
1651 definition from some other object, eg. a static library. Thirdly, we'd
1652 like to use .foo as the stub symbol to avoid creating another symbol.
1653 We need to make sure that when .foo labels a stub in a shared library,
1654 it isn't exported. */
65f38f15
AM		 1655
1656/* The linker needs to keep track of the number of relocs that it
1657 decides to copy as dynamic relocs in check_relocs for each symbol.
1658 This is so that it can later discard them if they are found to be
1659 unnecessary. We store the information in a field extending the
1660 regular ELF linker hash table. */
1661
1662struct ppc_dyn_relocs
1663{
1664 struct ppc_dyn_relocs *next;
1665
1666 /* The input section of the reloc. */
1667 asection *sec;
1668
1669 /* Total number of relocs copied for the input section. */
1670 bfd_size_type count;
1671
1672 /* Number of pc-relative relocs copied for the input section. */
1673 bfd_size_type pc_count;
1674};
1675
1676/* Of those relocs that might be copied as dynamic relocs, this macro
1677 selects between relative and absolute types. */
1678
1679#define IS_ABSOLUTE_RELOC(RTYPE) \
1680 ((RTYPE) != R_PPC64_REL14 \
1681 && (RTYPE) != R_PPC64_REL14_BRNTAKEN \
1682 && (RTYPE) != R_PPC64_REL14_BRTAKEN \
1683 && (RTYPE) != R_PPC64_REL24 \
1684 && (RTYPE) != R_PPC64_REL32 \
1685 && (RTYPE) != R_PPC64_REL64)
1686
1687/* ppc64 ELF linker hash entry. */
1688
1689struct ppc_link_hash_entry
1690{
1691 struct elf_link_hash_entry elf;
1692
1693 /* Track dynamic relocs copied for this symbol. */
1694 struct ppc_dyn_relocs *dyn_relocs;
e86ce104
AM		 1695
1696 /* Flag function code and descriptor symbols. */
1697 unsigned int is_func:1;
1698 unsigned int is_func_descriptor:1;
65f38f15
AM		 1699};
1700
1701/* ppc64 ELF linker hash table. */
1702
1703struct ppc_link_hash_table
1704{
1705 struct elf_link_hash_table elf;
1706
1707 /* Short-cuts to get to dynamic linker sections. */
1708 asection *sgot;
1709 asection *srelgot;
1710 asection *splt;
1711 asection *srelplt;
1712 asection *sdynbss;
1713 asection *srelbss;
5d1634d7 1714 asection *sstub;
65f38f15 1715 asection *sglink;
ec338859 1716
5d1634d7
AM		 1717 /* Set on error. */
1718 int plt_overflow;
1719
ec338859
AM		 1720 /* Small local sym to section mapping cache. */
1721 struct sym_sec_cache sym_sec;
65f38f15
AM		 1722};
1723
1724/* Get the ppc64 ELF linker hash table from a link_info structure. */
1725
1726#define ppc_hash_table(p) \
1727 ((struct ppc_link_hash_table *) ((p)->hash))
1728
1729/* Create an entry in a ppc64 ELF linker hash table. */
1730
1731static struct bfd_hash_entry *
1732link_hash_newfunc (entry, table, string)
1733 struct bfd_hash_entry *entry;
1734 struct bfd_hash_table *table;
1735 const char *string;
1736{
1737 /* Allocate the structure if it has not already been allocated by a
1738 subclass. */
1739 if (entry == NULL)
1740 {
1741 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
1742 if (entry == NULL)
1743 return entry;
1744 }
1745
1746 /* Call the allocation method of the superclass. */
1747 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1748 if (entry != NULL)
1749 {
1750 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
1751
1752 eh->dyn_relocs = NULL;
e86ce104
AM		 1753 eh->is_func = 0;
1754 eh->is_func_descriptor = 0;
65f38f15
AM		 1755 }
1756
1757 return entry;
1758}
1759
1760/* Create a ppc64 ELF linker hash table. */
1761
1762static struct bfd_link_hash_table *
1763ppc64_elf_link_hash_table_create (abfd)
1764 bfd *abfd;
1765{
1766 struct ppc_link_hash_table *htab;
1767 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
1768
1769 htab = (struct ppc_link_hash_table *) bfd_alloc (abfd, amt);
1770 if (htab == NULL)
1771 return NULL;
1772
1773 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
1774 {
1775 bfd_release (abfd, htab);
1776 return NULL;
1777 }
1778
1779 htab->sgot = NULL;
1780 htab->srelgot = NULL;
1781 htab->splt = NULL;
1782 htab->srelplt = NULL;
1783 htab->sdynbss = NULL;
1784 htab->srelbss = NULL;
5d1634d7 1785 htab->sstub = NULL;
65f38f15 1786 htab->sglink = NULL;
5d1634d7 1787 htab->plt_overflow = 0;
ec338859 1788 htab->sym_sec.abfd = NULL;
65f38f15
AM		 1789
1790 return &htab->elf.root;
1791}
1792
1793/* Create .got and .rela.got sections in DYNOBJ, and set up
1794 shortcuts to them in our hash table. */
1795
1796static boolean
1797create_got_section (dynobj, info)
1798 bfd *dynobj;
1799 struct bfd_link_info *info;
1800{
1801 struct ppc_link_hash_table *htab;
1802
1803 if (! _bfd_elf_create_got_section (dynobj, info))
1804 return false;
1805
1806 htab = ppc_hash_table (info);
1807 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
1808 if (!htab->sgot)
1809 abort ();
1810
1811 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
1812 if (!htab->srelgot
1813 || ! bfd_set_section_flags (dynobj, htab->srelgot,
1814 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1815 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1816 | SEC_READONLY))
1817 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
1818 return false;
1819 return true;
1820}
5bd4f169 1821
5d1634d7
AM		 1822/* Create the .stub and .glink sections as well as the ordinary
1823 dynamic sections. */
5bd4f169
AM		 1824
1825static boolean
65f38f15
AM		 1826ppc64_elf_create_dynamic_sections (dynobj, info)
1827 bfd *dynobj;
5bd4f169
AM		 1828 struct bfd_link_info *info;
1829{
65f38f15 1830 struct ppc_link_hash_table *htab;
5bd4f169
AM		 1831 flagword flags;
1832
65f38f15
AM		 1833 htab = ppc_hash_table (info);
1834 if (!htab->sgot && !create_got_section (dynobj, info))
5bd4f169
AM		 1835 return false;
1836
65f38f15 1837 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
5bd4f169 1838 return false;
65f38f15
AM		 1839
1840 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
1841 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
1842 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
1843 if (!info->shared)
1844 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
1845
1846 if (!htab->splt || !htab->srelplt || !htab->sdynbss
1847 || (!info->shared && !htab->srelbss))
1848 abort ();
1849
5d1634d7
AM		 1850 /* Create .stub and .glink for global linkage functions. */
1851 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
1852 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1853 htab->sstub = bfd_make_section (dynobj, ".stub");
1854 if (htab->sstub == NULL
1855 || ! bfd_set_section_flags (dynobj, htab->sstub, flags)
1856 || ! bfd_set_section_alignment (dynobj, htab->sstub, 2))
5bd4f169 1857 return false;
65f38f15
AM		 1858 htab->sglink = bfd_make_section (dynobj, ".glink");
1859 if (htab->sglink == NULL
1860 || ! bfd_set_section_flags (dynobj, htab->sglink, flags)
1861 || ! bfd_set_section_alignment (dynobj, htab->sglink, 3))
5bd4f169
AM		 1862 return false;
1863
1864 return true;
1865}
1866
65f38f15
AM		 1867/* Copy the extra info we tack onto an elf_link_hash_entry. */
1868
1869static void
1870ppc64_elf_copy_indirect_symbol (dir, ind)
1871 struct elf_link_hash_entry *dir, *ind;
1872{
1873 struct ppc_link_hash_entry *edir, *eind;
1874
1875 edir = (struct ppc_link_hash_entry *) dir;
1876 eind = (struct ppc_link_hash_entry *) ind;
1877
bbd7ec4a 1878 if (eind->dyn_relocs != NULL)
65f38f15 1879 {
bbd7ec4a
AM		 1880 if (edir->dyn_relocs != NULL)
1881 {
1882 struct ppc_dyn_relocs **pp;
1883 struct ppc_dyn_relocs *p;
1884
1e370bd2 1885 if (ind->root.type == bfd_link_hash_indirect)
bbd7ec4a
AM		 1886 abort ();
1887
1888 /* Add reloc counts against the weak sym to the strong sym
1889 list. Merge any entries against the same section. */
1890 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1891 {
1892 struct ppc_dyn_relocs *q;
1893
1894 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1895 if (q->sec == p->sec)
1896 {
1897 q->pc_count += p->pc_count;
1898 q->count += p->count;
1899 *pp = p->next;
1900 break;
1901 }
1902 if (q == NULL)
1903 pp = &p->next;
1904 }
1905 *pp = edir->dyn_relocs;
1906 }
1907
65f38f15
AM		 1908 edir->dyn_relocs = eind->dyn_relocs;
1909 eind->dyn_relocs = NULL;
1910 }
65f38f15 1911
e86ce104
AM		 1912 edir->is_func |= eind->is_func;
1913 edir->is_func_descriptor |= eind->is_func_descriptor;
1914
65f38f15
AM		 1915 _bfd_elf_link_hash_copy_indirect (dir, ind);
1916}
1917
5bd4f169 1918/* Look through the relocs for a section during the first phase, and
65f38f15 1919 calculate needed space in the global offset table, procedure
5d1634d7 1920 linkage table, and dynamic reloc sections. */
5bd4f169
AM		 1921
1922static boolean
1923ppc64_elf_check_relocs (abfd, info, sec, relocs)
1924 bfd *abfd;
1925 struct bfd_link_info *info;
1926 asection *sec;
1927 const Elf_Internal_Rela *relocs;
1928{
65f38f15 1929 struct ppc_link_hash_table *htab;
5bd4f169
AM		 1930 Elf_Internal_Shdr *symtab_hdr;
1931 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
1932 const Elf_Internal_Rela *rel;
1933 const Elf_Internal_Rela *rel_end;
5bd4f169 1934 asection *sreloc;
e86ce104 1935 boolean is_opd;
5bd4f169
AM		 1936
1937 if (info->relocateable)
1938 return true;
1939
65f38f15 1940 htab = ppc_hash_table (info);
5bd4f169 1941 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5bd4f169
AM		 1942
1943 sym_hashes = elf_sym_hashes (abfd);
1944 sym_hashes_end = (sym_hashes
1945 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym));
1946 if (!elf_bad_symtab (abfd))
1947 sym_hashes_end -= symtab_hdr->sh_info;
1948
1949 sreloc = NULL;
e86ce104 1950 is_opd = strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0;
5bd4f169
AM		 1951
1952 rel_end = relocs + sec->reloc_count;
1953 for (rel = relocs; rel < rel_end; rel++)
1954 {
1955 unsigned long r_symndx;
1956 struct elf_link_hash_entry *h;
a33d1f77 1957 enum elf_ppc_reloc_type r_type;
5bd4f169
AM		 1958
1959 r_symndx = ELF64_R_SYM (rel->r_info);
1960 if (r_symndx < symtab_hdr->sh_info)
1961 h = NULL;
1962 else
1963 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1964
a33d1f77
AM		 1965 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
1966 switch (r_type)
5bd4f169
AM		 1967 {
1968 /* GOT16 relocations */
1969 case R_PPC64_GOT16:
5bd4f169 1970 case R_PPC64_GOT16_DS:
65f38f15
AM		 1971 case R_PPC64_GOT16_HA:
1972 case R_PPC64_GOT16_HI:
1973 case R_PPC64_GOT16_LO:
5bd4f169 1974 case R_PPC64_GOT16_LO_DS:
5bd4f169 1975
65f38f15
AM		 1976 /* This symbol requires a global offset table entry. */
1977 if (htab->sgot == NULL)
5bd4f169 1978 {
65f38f15
AM		 1979 if (htab->elf.dynobj == NULL)
1980 htab->elf.dynobj = abfd;
1981 if (!create_got_section (htab->elf.dynobj, info))
5bd4f169 1982 return false;
5bd4f169
AM		 1983 }
1984
1985 if (h != NULL)
1986 {
65f38f15 1987 h->got.refcount += 1;
5bd4f169
AM		 1988 }
1989 else
1990 {
65f38f15
AM		 1991 bfd_signed_vma *local_got_refcounts;
1992
5bd4f169 1993 /* This is a global offset table entry for a local symbol. */
65f38f15 1994 local_got_refcounts = elf_local_got_refcounts (abfd);
5bd4f169
AM		 1995 if (local_got_refcounts == NULL)
1996 {
dc810e39 1997 bfd_size_type size;
5bd4f169 1998
dc810e39
AM		 1999 size = symtab_hdr->sh_info;
2000 size *= sizeof (bfd_signed_vma);
2001 local_got_refcounts = ((bfd_signed_vma *)
65f38f15 2002 bfd_zalloc (abfd, size));
5bd4f169
AM		 2003 if (local_got_refcounts == NULL)
2004 return false;
2005 elf_local_got_refcounts (abfd) = local_got_refcounts;
5bd4f169 2006 }
65f38f15 2007 local_got_refcounts[r_symndx] += 1;
5bd4f169
AM		 2008 }
2009 break;
2010
5bd4f169 2011 case R_PPC64_PLT16_HA:
65f38f15
AM		 2012 case R_PPC64_PLT16_HI:
2013 case R_PPC64_PLT16_LO:
2014 case R_PPC64_PLT32:
2015 case R_PPC64_PLT64:
5bd4f169
AM		 2016 /* This symbol requires a procedure linkage table entry. We
2017 actually build the entry in adjust_dynamic_symbol,
2018 because this might be a case of linking PIC code without
2019 linking in any dynamic objects, in which case we don't
2020 need to generate a procedure linkage table after all. */
5bd4f169
AM		 2021 if (h == NULL)
2022 {
2023 /* It does not make sense to have a procedure linkage
2024 table entry for a local symbol. */
2025 bfd_set_error (bfd_error_bad_value);
2026 return false;
2027 }
2028
65f38f15
AM		 2029 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2030 h->plt.refcount += 1;
e86ce104 2031 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5bd4f169
AM		 2032 break;
2033
2034 /* The following relocations don't need to propagate the
2035 relocation if linking a shared object since they are
2036 section relative. */
2037 case R_PPC64_SECTOFF:
2038 case R_PPC64_SECTOFF_LO:
2039 case R_PPC64_SECTOFF_HI:
2040 case R_PPC64_SECTOFF_HA:
2041 case R_PPC64_SECTOFF_DS:
2042 case R_PPC64_SECTOFF_LO_DS:
2043 case R_PPC64_TOC16:
2044 case R_PPC64_TOC16_LO:
2045 case R_PPC64_TOC16_HI:
2046 case R_PPC64_TOC16_HA:
2047 case R_PPC64_TOC16_DS:
2048 case R_PPC64_TOC16_LO_DS:
2049 break;
2050
2051 /* This relocation describes the C++ object vtable hierarchy.
2052 Reconstruct it for later use during GC. */
2053 case R_PPC64_GNU_VTINHERIT:
2054 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2055 return false;
2056 break;
2057
2058 /* This relocation describes which C++ vtable entries are actually
2059 used. Record for later use during GC. */
2060 case R_PPC64_GNU_VTENTRY:
2061 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2062 return false;
2063 break;
2064
5d1634d7 2065 case R_PPC64_REL24:
e86ce104
AM		 2066 if (h != NULL
2067 && h->root.root.string[0] == '.'
2068 && h->root.root.string[1] != 0)
5d1634d7
AM		 2069 {
2070 /* We may need a .plt entry if the function this reloc
2071 refers to is in a shared lib. */
2072 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2073 h->plt.refcount += 1;
e86ce104 2074 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5d1634d7
AM		 2075 }
2076 break;
2077
e86ce104
AM		 2078 case R_PPC64_ADDR64:
2079 if (is_opd
2080 && h != NULL
2081 && h->root.root.string[0] == '.'
2082 && h->root.root.string[1] != 0)
2083 {
2084 struct elf_link_hash_entry *fdh;
2085
2086 fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
2087 false, false, false);
2088 if (fdh != NULL)
2089 {
2090 /* Ensure the function descriptor symbol string is
2091 part of the code symbol string. We aren't
2092 changing the name here, just allowing some tricks
2093 in ppc64_elf_hide_symbol. */
2094 fdh->root.root.string = h->root.root.string + 1;
2095 ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
2096 ((struct ppc_link_hash_entry *) h)->is_func = 1;
2097 }
2098 }
2099 /* Fall through. */
2100
5bd4f169
AM		 2101 case R_PPC64_REL64:
2102 case R_PPC64_REL32:
5bd4f169
AM		 2103 case R_PPC64_REL14:
2104 case R_PPC64_REL14_BRTAKEN:
2105 case R_PPC64_REL14_BRNTAKEN:
65f38f15
AM		 2106 case R_PPC64_ADDR14:
2107 case R_PPC64_ADDR14_BRNTAKEN:
2108 case R_PPC64_ADDR14_BRTAKEN:
2109 case R_PPC64_ADDR16:
2110 case R_PPC64_ADDR16_DS:
2111 case R_PPC64_ADDR16_HA:
2112 case R_PPC64_ADDR16_HI:
2113 case R_PPC64_ADDR16_HIGHER:
2114 case R_PPC64_ADDR16_HIGHERA:
2115 case R_PPC64_ADDR16_HIGHEST:
2116 case R_PPC64_ADDR16_HIGHESTA:
2117 case R_PPC64_ADDR16_LO:
2118 case R_PPC64_ADDR16_LO_DS:
2119 case R_PPC64_ADDR24:
2120 case R_PPC64_ADDR30:
2121 case R_PPC64_ADDR32:
65f38f15
AM		 2122 case R_PPC64_UADDR16:
2123 case R_PPC64_UADDR32:
2124 case R_PPC64_UADDR64:
5bd4f169 2125 case R_PPC64_TOC:
e86ce104
AM		 2126#if 0
2127 /* Don't propagate .opd relocs. */
2128 if (is_opd)
2129 break;
2130#endif
2131
65f38f15
AM		 2132 /* If we are creating a shared library, and this is a reloc
2133 against a global symbol, or a non PC relative reloc
2134 against a local symbol, then we need to copy the reloc
2135 into the shared library. However, if we are linking with
2136 -Bsymbolic, we do not need to copy a reloc against a
2137 global symbol which is defined in an object we are
2138 including in the link (i.e., DEF_REGULAR is set). At
2139 this point we have not seen all the input files, so it is
2140 possible that DEF_REGULAR is not set now but will be set
2141 later (it is never cleared). In case of a weak definition,
2142 DEF_REGULAR may be cleared later by a strong definition in
2143 a shared library. We account for that possibility below by
2144 storing information in the relocs_copied field of the hash
2145 table entry. A similar situation occurs when creating
2146 shared libraries and symbol visibility changes render the
2147 symbol local.
2148
2149 If on the other hand, we are creating an executable, we
2150 may need to keep relocations for symbols satisfied by a
2151 dynamic library if we manage to avoid copy relocs for the
2152 symbol. */
2153 if ((info->shared
2154 && (sec->flags & SEC_ALLOC) != 0
a33d1f77 2155 && (IS_ABSOLUTE_RELOC (r_type)
65f38f15
AM		 2156 || (h != NULL
2157 && (! info->symbolic
2158 || h->root.type == bfd_link_hash_defweak
2159 || (h->elf_link_hash_flags
2160 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2161 || (!info->shared
2162 && (sec->flags & SEC_ALLOC) != 0
2163 && h != NULL
2164 && (h->root.type == bfd_link_hash_defweak
2165 || (h->elf_link_hash_flags
2166 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
5bd4f169 2167 {
ec338859
AM		 2168 struct ppc_dyn_relocs *p;
2169 struct ppc_dyn_relocs **head;
2170
65f38f15
AM		 2171 /* We must copy these reloc types into the output file.
2172 Create a reloc section in dynobj and make room for
2173 this reloc. */
5bd4f169
AM		 2174 if (sreloc == NULL)
2175 {
2176 const char *name;
65f38f15 2177 bfd *dynobj;
5bd4f169
AM		 2178
2179 name = (bfd_elf_string_from_elf_section
2180 (abfd,
2181 elf_elfheader (abfd)->e_shstrndx,
2182 elf_section_data (sec)->rel_hdr.sh_name));
2183 if (name == NULL)
2184 return false;
2185
65f38f15
AM		 2186 if (strncmp (name, ".rela", 5) != 0
2187 || strcmp (bfd_get_section_name (abfd, sec),
2188 name + 5) != 0)
2189 {
2190 (*_bfd_error_handler)
2191 (_("%s: bad relocation section name `%s\'"),
2192 bfd_archive_filename (abfd), name);
5d1634d7 2193 bfd_set_error (bfd_error_bad_value);
65f38f15
AM		 2194 }
2195
2196 if (htab->elf.dynobj == NULL)
2197 htab->elf.dynobj = abfd;
5bd4f169 2198
65f38f15 2199 dynobj = htab->elf.dynobj;
5bd4f169
AM		 2200 sreloc = bfd_get_section_by_name (dynobj, name);
2201 if (sreloc == NULL)
2202 {
2203 flagword flags;
2204
2205 sreloc = bfd_make_section (dynobj, name);
2206 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2207 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2208 if ((sec->flags & SEC_ALLOC) != 0)
2209 flags |= SEC_ALLOC | SEC_LOAD;
2210 if (sreloc == NULL
2211 || ! bfd_set_section_flags (dynobj, sreloc, flags)
65f38f15 2212 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
5bd4f169
AM		 2213 return false;
2214 }
65f38f15 2215 elf_section_data (sec)->sreloc = sreloc;
5bd4f169
AM		 2216 }
2217
65f38f15
AM		 2218 /* If this is a global symbol, we count the number of
2219 relocations we need for this symbol. */
2220 if (h != NULL)
2221 {
ec338859 2222 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
65f38f15
AM		 2223 }
2224 else
2225 {
ec338859
AM		 2226 /* Track dynamic relocs needed for local syms too.
2227 We really need local syms available to do this
2228 easily. Oh well. */
2229
2230 asection *s;
2231 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
2232 sec, r_symndx);
2233 if (s == NULL)
2234 return false;
2235
2236 head = ((struct ppc_dyn_relocs **)
2237 &elf_section_data (s)->local_dynrel);
65f38f15 2238 }
ec338859
AM		 2239
2240 p = *head;
2241 if (p == NULL || p->sec != sec)
2242 {
2243 p = ((struct ppc_dyn_relocs *)
2244 bfd_alloc (htab->elf.dynobj,
2245 (bfd_size_type) sizeof *p));
2246 if (p == NULL)
2247 return false;
2248 p->next = *head;
2249 *head = p;
2250 p->sec = sec;
2251 p->count = 0;
2252 p->pc_count = 0;
2253 }
2254
2255 p->count += 1;
2256 if (!IS_ABSOLUTE_RELOC (r_type))
2257 p->pc_count += 1;
65f38f15 2258 }
5bd4f169 2259 break;
65f38f15
AM		 2260
2261 default:
5bd4f169
AM		 2262 }
2263 }
2264
2265 return true;
2266}
2267
2268/* Return the section that should be marked against GC for a given
2269 relocation. */
2270
2271static asection *
2272ppc64_elf_gc_mark_hook (abfd, info, rel, h, sym)
2273 bfd *abfd;
2274 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2275 Elf_Internal_Rela *rel;
2276 struct elf_link_hash_entry *h;
2277 Elf_Internal_Sym *sym;
2278{
2279 if (h != NULL)
2280 {
a33d1f77
AM		 2281 enum elf_ppc_reloc_type r_type;
2282
2283 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
2284 switch (r_type)
5bd4f169
AM		 2285 {
2286 case R_PPC64_GNU_VTINHERIT:
2287 case R_PPC64_GNU_VTENTRY:
2288 break;
2289
2290 default:
2291 switch (h->root.type)
2292 {
2293 case bfd_link_hash_defined:
2294 case bfd_link_hash_defweak:
2295 return h->root.u.def.section;
2296
2297 case bfd_link_hash_common:
2298 return h->root.u.c.p->section;
2299
2300 default:
2301 break;
2302 }
2303 }
2304 }
2305 else
2306 {
9ad5cbcf 2307 return bfd_section_from_elf_index (abfd, sym->st_shndx);
5bd4f169
AM		 2308 }
2309
2310 return NULL;
2311}
2312
65f38f15
AM		 2313/* Update the .got, .plt. and dynamic reloc reference counts for the
2314 section being removed. */
5bd4f169
AM		 2315
2316static boolean
2317ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs)
2318 bfd *abfd;
2319 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2320 asection *sec;
2321 const Elf_Internal_Rela *relocs;
2322{
2323 Elf_Internal_Shdr *symtab_hdr;
2324 struct elf_link_hash_entry **sym_hashes;
2325 bfd_signed_vma *local_got_refcounts;
2326 const Elf_Internal_Rela *rel, *relend;
5bd4f169 2327
ec338859
AM		 2328 elf_section_data (sec)->local_dynrel = NULL;
2329
5bd4f169
AM		 2330 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2331 sym_hashes = elf_sym_hashes (abfd);
2332 local_got_refcounts = elf_local_got_refcounts (abfd);
2333
2334 relend = relocs + sec->reloc_count;
2335 for (rel = relocs; rel < relend; rel++)
a33d1f77
AM		 2336 {
2337 unsigned long r_symndx;
2338 enum elf_ppc_reloc_type r_type;
2339 struct elf_link_hash_entry *h;
5bd4f169 2340
a33d1f77
AM		 2341 r_symndx = ELF64_R_SYM (rel->r_info);
2342 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
2343 switch (r_type)
2344 {
2345 case R_PPC64_GOT16:
2346 case R_PPC64_GOT16_DS:
2347 case R_PPC64_GOT16_HA:
2348 case R_PPC64_GOT16_HI:
2349 case R_PPC64_GOT16_LO:
2350 case R_PPC64_GOT16_LO_DS:
2351 if (r_symndx >= symtab_hdr->sh_info)
2352 {
2353 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2354 if (h->got.refcount > 0)
2355 h->got.refcount--;
2356 }
2357 else
2358 {
2359 if (local_got_refcounts[r_symndx] > 0)
2360 local_got_refcounts[r_symndx]--;
2361 }
2362 break;
65f38f15 2363
a33d1f77
AM		 2364 case R_PPC64_PLT16_HA:
2365 case R_PPC64_PLT16_HI:
2366 case R_PPC64_PLT16_LO:
2367 case R_PPC64_PLT32:
2368 case R_PPC64_PLT64:
2369 if (r_symndx >= symtab_hdr->sh_info)
2370 {
2371 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2372 if (h->plt.refcount > 0)
2373 h->plt.refcount--;
2374 }
2375 break;
65f38f15 2376
5d1634d7
AM		 2377 case R_PPC64_REL24:
2378 if (r_symndx >= symtab_hdr->sh_info)
2379 {
2380 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2381 if (h->plt.refcount > 0)
2382 h->plt.refcount--;
2383 }
e86ce104 2384 break;
5d1634d7 2385
a33d1f77
AM		 2386 case R_PPC64_REL14:
2387 case R_PPC64_REL14_BRNTAKEN:
2388 case R_PPC64_REL14_BRTAKEN:
a33d1f77
AM		 2389 case R_PPC64_REL32:
2390 case R_PPC64_REL64:
2391 if (r_symndx >= symtab_hdr->sh_info)
2392 {
2393 struct ppc_link_hash_entry *eh;
2394 struct ppc_dyn_relocs **pp;
2395 struct ppc_dyn_relocs *p;
65f38f15 2396
a33d1f77
AM		 2397 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2398 eh = (struct ppc_link_hash_entry *) h;
65f38f15 2399
a33d1f77
AM		 2400 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2401 if (p->sec == sec)
2402 {
2403 p->pc_count -= 1;
2404 p->count -= 1;
2405 if (p->count == 0)
2406 *pp = p->next;
2407 break;
2408 }
2409 }
2410 break;
65f38f15 2411
a33d1f77
AM		 2412 case R_PPC64_ADDR14:
2413 case R_PPC64_ADDR14_BRNTAKEN:
2414 case R_PPC64_ADDR14_BRTAKEN:
2415 case R_PPC64_ADDR16:
2416 case R_PPC64_ADDR16_DS:
2417 case R_PPC64_ADDR16_HA:
2418 case R_PPC64_ADDR16_HI:
2419 case R_PPC64_ADDR16_HIGHER:
2420 case R_PPC64_ADDR16_HIGHERA:
2421 case R_PPC64_ADDR16_HIGHEST:
2422 case R_PPC64_ADDR16_HIGHESTA:
2423 case R_PPC64_ADDR16_LO:
2424 case R_PPC64_ADDR16_LO_DS:
2425 case R_PPC64_ADDR24:
2426 case R_PPC64_ADDR30:
2427 case R_PPC64_ADDR32:
2428 case R_PPC64_ADDR64:
2429 case R_PPC64_UADDR16:
2430 case R_PPC64_UADDR32:
2431 case R_PPC64_UADDR64:
2432 case R_PPC64_TOC:
2433 if (r_symndx >= symtab_hdr->sh_info)
2434 {
2435 struct ppc_link_hash_entry *eh;
2436 struct ppc_dyn_relocs **pp;
2437 struct ppc_dyn_relocs *p;
65f38f15 2438
a33d1f77
AM		 2439 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2440 eh = (struct ppc_link_hash_entry *) h;
2441
2442 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2443 if (p->sec == sec)
2444 {
2445 p->count -= 1;
2446 if (p->count == 0)
2447 *pp = p->next;
2448 break;
2449 }
2450 }
2451 break;
5bd4f169 2452
a33d1f77
AM		 2453 default:
2454 break;
2455 }
2456 }
5bd4f169
AM		 2457 return true;
2458}
2459
e86ce104
AM		 2460/* Called via elf_link_hash_traverse to transfer dynamic linking
2461 information on function code symbol entries to their corresponding
2462 function descriptor symbol entries. */
5bd4f169 2463static boolean
e86ce104 2464func_desc_adjust (h, inf)
5bd4f169 2465 struct elf_link_hash_entry *h;
e86ce104 2466 PTR inf;
5bd4f169 2467{
e86ce104 2468 struct bfd_link_info *info;
65f38f15 2469 struct ppc_link_hash_table *htab;
5bd4f169 2470
e86ce104
AM		 2471 if (h->root.type == bfd_link_hash_indirect
2472 || h->root.type == bfd_link_hash_warning)
2473 return true;
2474
2475 info = (struct bfd_link_info *) inf;
65f38f15 2476 htab = ppc_hash_table (info);
5bd4f169 2477
e86ce104
AM		 2478 /* If this is a function code symbol, transfer dynamic linking
2479 information to the function descriptor symbol. */
2480 if (!((struct ppc_link_hash_entry *) h)->is_func)
2481 return true;
2482
2483 if (h->plt.refcount > 0
2484 && h->root.root.string[0] == '.'
2485 && h->root.root.string[1] != '\0')
5bd4f169 2486 {
65f38f15 2487 struct elf_link_hash_entry *fdh;
e86ce104 2488 boolean force_local;
5bd4f169 2489
65f38f15 2490 /* Find the corresponding function descriptor symbol. Create it
e86ce104 2491 as undefined if necessary. */
5bd4f169 2492
e86ce104
AM		 2493 fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
2494 false, false, true);
5bd4f169 2495
e86ce104 2496 if (fdh == NULL && info->shared)
5bd4f169 2497 {
e86ce104 2498 bfd *abfd;
65f38f15
AM		 2499 asymbol *newsym;
2500
2501 /* Create it as undefined. */
e86ce104
AM		 2502 if (h->root.type == bfd_link_hash_undefined
2503 || h->root.type == bfd_link_hash_undefweak)
2504 abfd = h->root.u.undef.abfd;
2505 else if (h->root.type == bfd_link_hash_defined
2506 || h->root.type == bfd_link_hash_defweak)
2507 abfd = h->root.u.def.section->owner;
2508 else
2509 abort ();
2510 newsym = bfd_make_empty_symbol (abfd);
65f38f15
AM		 2511 newsym->name = h->root.root.string + 1;
2512 newsym->section = bfd_und_section_ptr;
2513 newsym->value = 0;
e86ce104
AM		 2514 newsym->flags = BSF_OBJECT;
2515 if (h->root.type == bfd_link_hash_undefweak)
2516 newsym->flags |= BSF_WEAK;
65f38f15
AM		 2517
2518 if ( !(_bfd_generic_link_add_one_symbol
e86ce104 2519 (info, abfd, newsym->name, newsym->flags,
65f38f15
AM		 2520 newsym->section, newsym->value, NULL, false, false,
2521 (struct bfd_link_hash_entry **) &fdh)))
5bd4f169 2522 {
65f38f15 2523 return false;
5bd4f169 2524 }
5bd4f169 2525 }
40b8271b 2526
e86ce104
AM		 2527 if (fdh != NULL
2528 && (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
2529 && (info->shared
2530 || (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2531 || (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0))
2532 {
2533 if (fdh->dynindx == -1)
2534 if (! bfd_elf64_link_record_dynamic_symbol (info, fdh))
2535 return false;
2536 fdh->plt.refcount = h->plt.refcount;
2537 fdh->elf_link_hash_flags |= (h->elf_link_hash_flags
2538 & (ELF_LINK_HASH_REF_REGULAR
2539 | ELF_LINK_HASH_REF_DYNAMIC
2540 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
2541 | ELF_LINK_NON_GOT_REF));
2542 fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2543 ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
2544 fdh->root.root.string = h->root.root.string + 1;
2545 }
2546
2547 /* Now that the info is on the function descriptor, clear the
2548 function code sym info. Any function code syms for which we
2549 don't have a definition in a regular file, we force local.
2550 This prevents a shared library from exporting syms that have
2551 been imported from another library. Function code syms that
2552 are really in the library we must leave global to prevent the
2553 linker dragging a definition in from a static library. */
2554 force_local = (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0;
2555 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2556 }
2557
2558 return true;
2559}
40b8271b 2560
e86ce104
AM		 2561/* Called near the start of bfd_elf_size_dynamic_sections. We use
2562 this hook to transfer dynamic linking information gathered so far
2563 on function code symbol entries, to their corresponding function
2564 descriptor symbol entries. */
2565static boolean
2566ppc64_elf_func_desc_adjust (obfd, info)
2567 bfd *obfd ATTRIBUTE_UNUSED;
2568 struct bfd_link_info *info;
2569{
2570 struct ppc_link_hash_table *htab;
2571
2572 htab = ppc_hash_table (info);
2573 elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info);
2574 return true;
2575}
2576
2577/* Adjust a symbol defined by a dynamic object and referenced by a
2578 regular object. The current definition is in some section of the
2579 dynamic object, but we're not including those sections. We have to
2580 change the definition to something the rest of the link can
2581 understand. */
2582
2583static boolean
2584ppc64_elf_adjust_dynamic_symbol (info, h)
2585 struct bfd_link_info *info;
2586 struct elf_link_hash_entry *h;
2587{
2588 struct ppc_link_hash_table *htab;
2589 struct ppc_link_hash_entry * eh;
2590 struct ppc_dyn_relocs *p;
2591 asection *s;
2592 unsigned int power_of_two;
2593
2594 htab = ppc_hash_table (info);
2595
2596 /* Deal with function syms. */
2597 if (h->type == STT_FUNC
2598 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2599 {
2600 /* Clear procedure linkage table information for any symbol that
2601 won't need a .plt entry. */
2602 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
2603 || h->plt.refcount <= 0
2604 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
2605 || (! info->shared
2606 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
2607 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0))
40b8271b 2608 {
40b8271b
AM		 2609 h->plt.offset = (bfd_vma) -1;
2610 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
40b8271b 2611 }
5bd4f169
AM		 2612 return true;
2613 }
bbd7ec4a
AM		 2614 else
2615 h->plt.offset = (bfd_vma) -1;
5bd4f169
AM		 2616
2617 /* If this is a weak symbol, and there is a real definition, the
2618 processor independent code will have arranged for us to see the
2619 real definition first, and we can just use the same value. */
2620 if (h->weakdef != NULL)
2621 {
2622 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2623 || h->weakdef->root.type == bfd_link_hash_defweak);
2624 h->root.u.def.section = h->weakdef->root.u.def.section;
2625 h->root.u.def.value = h->weakdef->root.u.def.value;
0a991dfe 2626 return true;
5bd4f169
AM		 2627 }
2628
2629 /* This is a reference to a symbol defined by a dynamic object which
2630 is not a function. */
2631
2632 /* If we are creating a shared library, we must presume that the
2633 only references to the symbol are via the global offset table.
2634 For such cases we need not do anything here; the relocations will
2635 be handled correctly by relocate_section. */
2636 if (info->shared)
2637 return true;
2638
65f38f15
AM		 2639 /* If there are no references to this symbol that do not use the
2640 GOT, we don't need to generate a copy reloc. */
2641 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
2642 return true;
2643
2644 eh = (struct ppc_link_hash_entry *) h;
2645 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2646 {
2647 s = p->sec->output_section;
2648 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2649 break;
2650 }
2651
2652 /* If we didn't find any dynamic relocs in read-only sections, then
5d1634d7 2653 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
65f38f15
AM		 2654 if (p == NULL)
2655 {
2656 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
2657 return true;
2658 }
2659
5bd4f169
AM		 2660 /* We must allocate the symbol in our .dynbss section, which will
2661 become part of the .bss section of the executable. There will be
2662 an entry for this symbol in the .dynsym section. The dynamic
2663 object will contain position independent code, so all references
2664 from the dynamic object to this symbol will go through the global
2665 offset table. The dynamic linker will use the .dynsym entry to
2666 determine the address it must put in the global offset table, so
2667 both the dynamic object and the regular object will refer to the
2668 same memory location for the variable. */
5bd4f169
AM		 2669
2670 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
2671 copy the initial value out of the dynamic object and into the
2672 runtime process image. We need to remember the offset into the
2673 .rela.bss section we are going to use. */
2674 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2675 {
65f38f15 2676 htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
5bd4f169
AM		 2677 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2678 }
2679
2680 /* We need to figure out the alignment required for this symbol. I
2681 have no idea how ELF linkers handle this. */
2682 power_of_two = bfd_log2 (h->size);
2683 if (power_of_two > 4)
2684 power_of_two = 4;
2685
2686 /* Apply the required alignment. */
65f38f15
AM		 2687 s = htab->sdynbss;
2688 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
2689 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5bd4f169 2690 {
65f38f15 2691 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5bd4f169
AM		 2692 return false;
2693 }
2694
2695 /* Define the symbol as being at this point in the section. */
2696 h->root.u.def.section = s;
2697 h->root.u.def.value = s->_raw_size;
2698
2699 /* Increment the section size to make room for the symbol. */
2700 s->_raw_size += h->size;
2701
2702 return true;
2703}
2704
e86ce104
AM		 2705/* If given a function descriptor symbol, hide both the function code
2706 sym and the descriptor. */
2707static void
2708ppc64_elf_hide_symbol (info, h, force_local)
2709 struct bfd_link_info *info;
2710 struct elf_link_hash_entry *h;
2711 boolean force_local;
2712{
2713 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2714
2715 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
2716 {
2717 const char *name;
2718 struct elf_link_hash_entry *fh;
2719 struct ppc_link_hash_table *htab;
2720
2721 name = h->root.root.string - 1;
2722 htab = ppc_hash_table (info);
2723 fh = elf_link_hash_lookup (&htab->elf, name, false, false, false);
2724 if (fh != NULL)
2725 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
2726 }
2727}
2728
65f38f15
AM		 2729/* This is the condition under which ppc64_elf_finish_dynamic_symbol
2730 will be called from elflink.h. If elflink.h doesn't call our
2731 finish_dynamic_symbol routine, we'll need to do something about
2732 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
2733#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
2734 ((DYN) \
2735 && ((INFO)->shared \
2736 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
2737 && ((H)->dynindx != -1 \
2738 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
5bd4f169 2739
65f38f15
AM		 2740/* Allocate space in .plt, .got and associated reloc sections for
2741 dynamic relocs. */
5bd4f169
AM		 2742
2743static boolean
65f38f15
AM		 2744allocate_dynrelocs (h, inf)
2745 struct elf_link_hash_entry *h;
2746 PTR inf;
5bd4f169 2747{
65f38f15
AM		 2748 struct bfd_link_info *info;
2749 struct ppc_link_hash_table *htab;
5bd4f169 2750 asection *s;
65f38f15
AM		 2751 struct ppc_link_hash_entry *eh;
2752 struct ppc_dyn_relocs *p;
5bd4f169 2753
65f38f15
AM		 2754 if (h->root.type == bfd_link_hash_indirect
2755 || h->root.type == bfd_link_hash_warning)
2756 return true;
5bd4f169 2757
65f38f15
AM		 2758 info = (struct bfd_link_info *) inf;
2759 htab = ppc_hash_table (info);
5bd4f169 2760
65f38f15 2761 if (htab->elf.dynamic_sections_created
e86ce104
AM		 2762 && h->plt.refcount > 0
2763 && h->dynindx != -1)
5bd4f169 2764 {
e86ce104 2765 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
5bd4f169 2766
65f38f15
AM		 2767 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
2768 {
65f38f15
AM		 2769 /* If this is the first .plt entry, make room for the special
2770 first entry. */
2771 s = htab->splt;
5bd4f169 2772 if (s->_raw_size == 0)
65f38f15
AM		 2773 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
2774
2775 h->plt.offset = s->_raw_size;
2776
2777 /* Make room for this entry. */
2778 s->_raw_size += PLT_ENTRY_SIZE;
2779
5d1634d7
AM		 2780 /* Make room for the .stub and .glink code. */
2781 s = htab->sstub;
2782 s->_raw_size += PLT_CALL_STUB_SIZE;
65f38f15 2783
5d1634d7
AM		 2784 s = htab->sglink;
2785 if (s->_raw_size == 0)
2786 s->_raw_size += GLINK_CALL_STUB_SIZE;
2787 /* We need bigger stubs past index 32767. */
2788 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
2789 s->_raw_size += 4;
2790 s->_raw_size += 2*4;
65f38f15
AM		 2791
2792 /* We also need to make an entry in the .rela.plt section. */
2793 s = htab->srelplt;
2794 s->_raw_size += sizeof (Elf64_External_Rela);
2795 }
2796 else
2797 {
2798 h->plt.offset = (bfd_vma) -1;
2799 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2800 }
2801 }
2802 else
2803 {
2804 h->plt.offset = (bfd_vma) -1;
2805 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2806 }
2807
2808 if (h->got.refcount > 0)
2809 {
2810 boolean dyn;
2811
2812 /* Make sure this symbol is output as a dynamic symbol.
2813 Undefined weak syms won't yet be marked as dynamic. */
2814 if (h->dynindx == -1
2815 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
2816 {
2817 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
2818 return false;
2819 }
2820
2821 s = htab->sgot;
2822 h->got.offset = s->_raw_size;
2823 s->_raw_size += 8;
2824 dyn = htab->elf.dynamic_sections_created;
2825 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
2826 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
2827 }
2828 else
2829 h->got.offset = (bfd_vma) -1;
2830
2831 eh = (struct ppc_link_hash_entry *) h;
2832 if (eh->dyn_relocs == NULL)
2833 return true;
2834
2835 /* In the shared -Bsymbolic case, discard space allocated for
2836 dynamic pc-relative relocs against symbols which turn out to be
2837 defined in regular objects. For the normal shared case, discard
2838 space for relocs that have become local due to symbol visibility
2839 changes. */
2840
2841 if (info->shared)
2842 {
2843 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
2844 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
2845 || info->symbolic))
2846 {
2847 struct ppc_dyn_relocs **pp;
2848
2849 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5bd4f169 2850 {
65f38f15
AM		 2851 p->count -= p->pc_count;
2852 p->pc_count = 0;
2853 if (p->count == 0)
2854 *pp = p->next;
2855 else
2856 pp = &p->next;
5bd4f169 2857 }
65f38f15
AM		 2858 }
2859 }
2860 else
2861 {
2862 /* For the non-shared case, discard space for relocs against
2863 symbols which turn out to need copy relocs or are not
2864 dynamic. */
2865
2866 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2867 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2868 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2869 || (htab->elf.dynamic_sections_created
2870 && (h->root.type == bfd_link_hash_undefweak
2871 || h->root.type == bfd_link_hash_undefined))))
2872 {
2873 /* Make sure this symbol is output as a dynamic symbol.
2874 Undefined weak syms won't yet be marked as dynamic. */
2875 if (h->dynindx == -1
2876 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
2877 {
ec338859 2878 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
65f38f15
AM		 2879 return false;
2880 }
2881
2882 /* If that succeeded, we know we'll be keeping all the
2883 relocs. */
2884 if (h->dynindx != -1)
2885 goto keep;
2886 }
2887
2888 eh->dyn_relocs = NULL;
2889
ec338859 2890 keep: ;
65f38f15
AM		 2891 }
2892
2893 /* Finally, allocate space. */
2894 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2895 {
2896 asection *sreloc = elf_section_data (p->sec)->sreloc;
2897 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
2898 }
2899
2900 return true;
2901}
2902
2903/* Find any dynamic relocs that apply to read-only sections. */
2904
2905static boolean
2906readonly_dynrelocs (h, inf)
2907 struct elf_link_hash_entry *h;
2908 PTR inf;
2909{
2910 struct ppc_link_hash_entry *eh;
2911 struct ppc_dyn_relocs *p;
2912
2913 eh = (struct ppc_link_hash_entry *) h;
2914 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2915 {
2916 asection *s = p->sec->output_section;
2917
2918 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2919 {
2920 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2921
2922 info->flags |= DF_TEXTREL;
2923
2924 /* Not an error, just cut short the traversal. */
2925 return false;
2926 }
2927 }
2928 return true;
2929}
2930
2931/* Set the sizes of the dynamic sections. */
2932
2933static boolean
2934ppc64_elf_size_dynamic_sections (output_bfd, info)
2935 bfd *output_bfd ATTRIBUTE_UNUSED;
2936 struct bfd_link_info *info;
2937{
2938 struct ppc_link_hash_table *htab;
2939 bfd *dynobj;
2940 asection *s;
2941 boolean relocs;
2942 bfd *ibfd;
2943
2944 htab = ppc_hash_table (info);
2945 dynobj = htab->elf.dynobj;
2946 if (dynobj == NULL)
2947 abort ();
2948
2949 if (htab->elf.dynamic_sections_created)
2950 {
2951 /* Set the contents of the .interp section to the interpreter. */
2952 if (! info->shared)
2953 {
2954 s = bfd_get_section_by_name (dynobj, ".interp");
2955 if (s == NULL)
2956 abort ();
2957 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
2958 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2959 }
2960 }
2961
2962 /* Set up .got offsets for local syms, and space for local dynamic
2963 relocs. */
2964 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2965 {
2966 bfd_signed_vma *local_got;
2967 bfd_signed_vma *end_local_got;
2968 bfd_size_type locsymcount;
2969 Elf_Internal_Shdr *symtab_hdr;
2970 asection *srel;
2971
2972 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2973 continue;
2974
2975 for (s = ibfd->sections; s != NULL; s = s->next)
2976 {
ec338859 2977 struct ppc_dyn_relocs *p;
65f38f15 2978
ec338859
AM		 2979 for (p = *((struct ppc_dyn_relocs **)
2980 &elf_section_data (s)->local_dynrel);
2981 p != NULL;
2982 p = p->next)
65f38f15 2983 {
ec338859
AM		 2984 if (!bfd_is_abs_section (p->sec)
2985 && bfd_is_abs_section (p->sec->output_section))
2986 {
2987 /* Input section has been discarded, either because
2988 it is a copy of a linkonce section or due to
2989 linker script /DISCARD/, so we'll be discarding
2990 the relocs too. */
2991 }
2992 else
2993 {
2994 srel = elf_section_data (p->sec)->sreloc;
2995 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
2996 }
65f38f15
AM		 2997 }
2998 }
2999
3000 local_got = elf_local_got_refcounts (ibfd);
3001 if (!local_got)
3002 continue;
3003
3004 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3005 locsymcount = symtab_hdr->sh_info;
3006 end_local_got = local_got + locsymcount;
3007 s = htab->sgot;
3008 srel = htab->srelgot;
3009 for (; local_got < end_local_got; ++local_got)
3010 {
3011 if (*local_got > 0)
5bd4f169 3012 {
65f38f15
AM		 3013 *local_got = s->_raw_size;
3014 s->_raw_size += 8;
3015 if (info->shared)
3016 srel->_raw_size += sizeof (Elf64_External_Rela);
5bd4f169 3017 }
65f38f15
AM		 3018 else
3019 *local_got = (bfd_vma) -1;
3020 }
3021 }
3022
3023 /* Allocate global sym .plt and .got entries, and space for global
3024 sym dynamic relocs. */
3025 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
3026
3027 /* We now have determined the sizes of the various dynamic sections.
3028 Allocate memory for them. */
3029 relocs = false;
3030 for (s = dynobj->sections; s != NULL; s = s->next)
3031 {
5d1634d7
AM		 3032 bfd_vma size;
3033
65f38f15
AM		 3034 if ((s->flags & SEC_LINKER_CREATED) == 0)
3035 continue;
3036
3037 if (s == htab->splt
3038 || s == htab->sgot
5d1634d7 3039 || s == htab->sstub
65f38f15
AM		 3040 || s == htab->sglink)
3041 {
3042 /* Strip this section if we don't need it; see the
3043 comment below. */
5bd4f169 3044 }
65f38f15 3045 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
5bd4f169
AM		 3046 {
3047 if (s->_raw_size == 0)
3048 {
3049 /* If we don't need this section, strip it from the
3050 output file. This is mostly to handle .rela.bss and
3051 .rela.plt. We must create both sections in
3052 create_dynamic_sections, because they must be created
3053 before the linker maps input sections to output
3054 sections. The linker does that before
3055 adjust_dynamic_symbol is called, and it is that
3056 function which decides whether anything needs to go
3057 into these sections. */
5bd4f169
AM		 3058 }
3059 else
3060 {
65f38f15
AM		 3061 if (s != htab->srelplt)
3062 relocs = true;
5bd4f169
AM		 3063
3064 /* We use the reloc_count field as a counter if we need
3065 to copy relocs into the output file. */
3066 s->reloc_count = 0;
3067 }
3068 }
65f38f15 3069 else
5bd4f169
AM		 3070 {
3071 /* It's not one of our sections, so don't allocate space. */
3072 continue;
3073 }
3074
65f38f15 3075 if (s->_raw_size == 0)
5bd4f169
AM		 3076 {
3077 _bfd_strip_section_from_output (info, s);
3078 continue;
3079 }
3080
65f38f15
AM		 3081 /* Allocate memory for the section contents. We use bfd_zalloc
3082 here in case unused entries are not reclaimed before the
3083 section's contents are written out. This should not happen,
3084 but this way if it does, we get a R_PPC64_NONE reloc instead
3085 of garbage. */
5d1634d7
AM		 3086 size = s->_raw_size;
3087 if (s == htab->sstub)
3088 {
3089 /* .stub may grow. Allocate enough for the maximum growth. */
3090 size += (size + 65536 + 65535) / 65536 * 4;
3091 }
3092 s->contents = (bfd_byte *) bfd_zalloc (dynobj, size);
65f38f15 3093 if (s->contents == NULL)
5bd4f169
AM		 3094 return false;
3095 }
3096
e86ce104 3097 if (htab->elf.dynamic_sections_created)
5bd4f169
AM		 3098 {
3099 /* Add some entries to the .dynamic section. We fill in the
3100 values later, in ppc64_elf_finish_dynamic_sections, but we
3101 must add the entries now so that we get the correct size for
3102 the .dynamic section. The DT_DEBUG entry is filled in by the
3103 dynamic linker and used by the debugger. */
dc810e39
AM		 3104#define add_dynamic_entry(TAG, VAL) \
3105 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
3106
3107 if (!info->shared)
5bd4f169 3108 {
dc810e39 3109 if (!add_dynamic_entry (DT_DEBUG, 0))
5bd4f169
AM		 3110 return false;
3111 }
3112
65f38f15 3113 if (htab->splt->_raw_size != 0)
5bd4f169 3114 {
dc810e39
AM		 3115 if (!add_dynamic_entry (DT_PLTGOT, 0)
3116 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3117 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5d1634d7
AM		 3118 || !add_dynamic_entry (DT_JMPREL, 0)
3119 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
5bd4f169
AM		 3120 return false;
3121 }
3122
3123 if (relocs)
3124 {
dc810e39
AM		 3125 if (!add_dynamic_entry (DT_RELA, 0)
3126 || !add_dynamic_entry (DT_RELASZ, 0)
3127 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
5bd4f169 3128 return false;
5bd4f169 3129
65f38f15
AM		 3130 /* If any dynamic relocs apply to a read-only section,
3131 then we need a DT_TEXTREL entry. */
3132 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, (PTR) info);
5bd4f169 3133
65f38f15 3134 if ((info->flags & DF_TEXTREL) != 0)
5bd4f169 3135 {
65f38f15
AM		 3136 if (!add_dynamic_entry (DT_TEXTREL, 0))
3137 return false;
5bd4f169 3138 }
5bd4f169 3139 }
5bd4f169 3140 }
65f38f15 3141#undef add_dynamic_entry
5bd4f169
AM		 3142
3143 return true;
3144}
3145
3146/* Called after we have seen all the input files/sections, but before
3147 final symbol resolution and section placement has been determined.
3148
3149 We use this hook to provide a value for TOCstart, which we store in
5d1634d7 3150 the output bfd elf_gp. */
5bd4f169 3151
5d1634d7
AM		 3152boolean
3153ppc64_elf_set_toc (obfd, info)
3154 bfd *obfd;
5bd4f169
AM		 3155 struct bfd_link_info *info;
3156{
5d1634d7 3157 if (!info->relocateable)
5bd4f169
AM		 3158 {
3159 asection *s;
3160 bfd_vma TOCstart;
3161
5d1634d7 3162 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
5bd4f169 3163 order. The TOC starts where the first of these sections starts. */
5d1634d7 3164 s = bfd_get_section_by_name (obfd, ".got");
5bd4f169 3165 if (s == NULL)
5d1634d7 3166 s = bfd_get_section_by_name (obfd, ".toc");
5bd4f169 3167 if (s == NULL)
5d1634d7 3168 s = bfd_get_section_by_name (obfd, ".tocbss");
5bd4f169 3169 if (s == NULL)
5d1634d7 3170 s = bfd_get_section_by_name (obfd, ".plt");
5bd4f169
AM		 3171 if (s == NULL)
3172 {
3173 /* This may happen for
3174 o references to TOC base (SYM@toc / TOC[tc0]) without a
3175 .toc directive
3176 o bad linker script
3177 o --gc-sections and empty TOC sections
3178
3179 FIXME: Warn user? */
3180
3181 /* Look for a likely section. We probably won't even be
3182 using TOCstart. */
5d1634d7 3183 for (s = obfd->sections; s != NULL; s = s->next)
5bd4f169
AM		 3184 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
3185 == (SEC_ALLOC | SEC_SMALL_DATA))
3186 break;
3187 if (s == NULL)
5d1634d7 3188 for (s = obfd->sections; s != NULL; s = s->next)
5bd4f169
AM		 3189 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
3190 == (SEC_ALLOC | SEC_SMALL_DATA))
3191 break;
3192 if (s == NULL)
5d1634d7 3193 for (s = obfd->sections; s != NULL; s = s->next)
5bd4f169
AM		 3194 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
3195 break;
3196 if (s == NULL)
5d1634d7 3197 for (s = obfd->sections; s != NULL; s = s->next)
5bd4f169
AM		 3198 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
3199 break;
3200 }
3201
3202 TOCstart = 0;
3203 if (s != NULL)
3204 TOCstart = s->output_section->vma + s->output_offset;
3205
5d1634d7
AM		 3206 elf_gp (obfd) = TOCstart;
3207 }
3208 return true;
3209}
3210
3211/* PowerPC64 .plt entries are 24 bytes long, which doesn't divide
3212 evenly into 64k. Sometimes with a large enough .plt, we'll need to
3213 use offsets differing in the high 16 bits when accessing a .plt
3214 entry from a .plt call stub. This function adjusts the size of
3215 .stub to accommodate the extra stub instruction needed in such
3216 cases. */
3217
3218boolean
3219ppc64_elf_size_stubs (obfd, info, changed)
3220 bfd *obfd;
3221 struct bfd_link_info *info;
3222 int *changed;
3223{
3224 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3225 bfd_vma plt_offset, next_64k;
3226 long base, num, extra;
3227
3228 /* .plt and .stub should be both present, or both absent. */
3229 if ((htab->splt == NULL || htab->splt->_raw_size == 0)
3230 != (htab->sstub == NULL || htab->sstub->_raw_size == 0))
3231 abort ();
3232
3233 /* If no .plt, then nothing to do. */
3234 if (htab->splt == NULL || htab->splt->_raw_size == 0)
3235 return true;
3236
3237 plt_offset = (htab->splt->output_section->vma
3238 + htab->splt->output_offset
3239 - elf_gp (obfd));
3240 next_64k = (plt_offset + 65535) & -65536;
3241
3242 /* If the .plt doesn't have any entries crossing a 64k boundary,
3243 then there is no need for bigger stubs. */
3244 if (next_64k <= plt_offset + htab->splt->_raw_size)
3245 return true;
3246
3247 /* OK, so we have at least one transition. Since .plt entries are
3248 24 bytes long, we'll strike it lucky every 3*64k, with the 64k
3249 boundary between .plt entries. */
3250 base = next_64k / 65536;
3251 num = (plt_offset + htab->splt->_raw_size - next_64k) / 65536;
3252 extra = (base % 3 + num + 1) * 2 / 3;
3253
3254 /* Allow one extra instruction for each EXTRA. The change in .stub
3255 may change the location of .toc and .plt. .toc and .plt ought to
3256 move as a group, but someone might be playing with eg. .plt
3257 alignment, so don't allow .stub size to decrease. */
3258 if (htab->sstub->_cooked_size < htab->sstub->_raw_size + extra * 4)
3259 {
3260 htab->sstub->_cooked_size = htab->sstub->_raw_size + extra * 4;
3261 *changed = true;
3262 }
3263 return true;
3264}
3265
3266/* Build a .plt call stub. */
3267
3268static bfd_byte *
3269build_plt_stub (obfd, p, offset, glink)
3270 bfd *obfd;
3271 bfd_byte *p;
3272 int offset;
3273 int glink;
3274{
3275#define PPC_LO(v) ((v) & 0xffff)
3276#define PPC_HI(v) (((v) >> 16) & 0xffff)
3277#define PPC_HA(v) PPC_HI ((v) + 0x8000)
3278
3279 if (glink)
3280 bfd_put_32 (obfd, LD_R2_40R1, p), p += 4;
3281 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
3282 if (!glink)
3283 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
3284 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
3285 if (PPC_HA (offset + 8) != PPC_HA (offset))
3286 bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
3287 offset += 8;
3288 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
3289 if (PPC_HA (offset + 8) != PPC_HA (offset))
3290 bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
3291 offset += 8;
3292 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
3293 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
3294 bfd_put_32 (obfd, BCTR, p), p += 4;
3295 return p;
3296}
3297
3298/* Build the stubs for one function call. */
3299
3300static boolean
3301build_one_stub (h, inf)
3302 struct elf_link_hash_entry *h;
3303 PTR inf;
3304{
3305 struct bfd_link_info *info;
3306 struct ppc_link_hash_table *htab;
3307
3308 if (h->root.type == bfd_link_hash_indirect
3309 || h->root.type == bfd_link_hash_warning)
3310 return true;
3311
3312 info = (struct bfd_link_info *) inf;
3313 htab = ppc_hash_table (info);
3314
3315 if (htab->elf.dynamic_sections_created
3316 && h->plt.offset != (bfd_vma) -1)
3317 {
e86ce104 3318 struct elf_link_hash_entry *fh;
5d1634d7
AM		 3319 asection *s;
3320 bfd_vma plt_r2;
3321 bfd_byte *p;
3322 unsigned int indx;
3323
e86ce104
AM		 3324 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
3325
3326 fh = elf_link_hash_lookup (&htab->elf, h->root.root.string - 1,
3327 false, false, true);
3328
3329 if (fh == NULL)
3330 abort ();
3331
3332 BFD_ASSERT (((struct ppc_link_hash_entry *) fh)->is_func);
3333
5d1634d7
AM		 3334 /* Point the function at the linkage stub. This works because
3335 the only references to the function code sym are calls.
3336 Function pointer comparisons use the function descriptor. */
3337 s = htab->sstub;
e86ce104
AM		 3338 fh->root.type = bfd_link_hash_defined;
3339 fh->root.u.def.section = s;
3340 fh->root.u.def.value = s->_cooked_size;
5d1634d7
AM		 3341
3342 /* Build the .plt call stub. */
3343 plt_r2 = (htab->splt->output_section->vma
3344 + htab->splt->output_offset
3345 + h->plt.offset
3346 - elf_gp (htab->splt->output_section->owner)
3347 - TOC_BASE_OFF);
3348
e86ce104
AM		 3349 if (plt_r2 + 0x80000000 > 0xffffffff
3350 || (plt_r2 & 3) != 0)
5d1634d7
AM		 3351 {
3352 (*_bfd_error_handler)
e86ce104 3353 (_("linkage table error against `%s'"),
5d1634d7
AM		 3354 h->root.root.string);
3355 bfd_set_error (bfd_error_bad_value);
3356 htab->plt_overflow = true;
3357 return false;
3358 }
3359 p = s->contents + s->_cooked_size;
3360 p = build_plt_stub (s->owner, p, (int) plt_r2, 0);
3361 s->_cooked_size = p - s->contents;
3362
3363 /* Build the .glink lazy link call stub. */
3364 s = htab->sglink;
3365 p = s->contents + s->_cooked_size;
3366 indx = s->reloc_count;
3367 if (indx < 0x8000)
3368 {
3369 bfd_put_32 (s->owner, LI_R0_0 | indx, p);
3370 p += 4;
3371 }
3372 else
3373 {
3374 bfd_put_32 (s->owner, LIS_R0_0 | PPC_HI (indx), p);
3375 p += 4;
3376 bfd_put_32 (s->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
3377 p += 4;
3378 }
3379 bfd_put_32 (s->owner, B_DOT | ((s->contents - p) & 0x3fffffc), p);
3380 p += 4;
3381 s->_cooked_size = p - s->contents;
3382 s->reloc_count += 1;
5bd4f169 3383 }
5d1634d7
AM		 3384 return true;
3385}
5bd4f169 3386
5d1634d7
AM		 3387boolean
3388ppc64_elf_build_stubs (obfd, info)
3389 bfd *obfd;
3390 struct bfd_link_info *info;
3391{
3392 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3393 bfd_vma old_stub_size;
3394 bfd_vma plt_r2;
3395 bfd_byte *p;
3396
3397 /* If no .plt stubs, then nothing to do. */
3398 if (htab->sstub == NULL || htab->sstub->_raw_size == 0)
3399 return true;
3400
3401 old_stub_size = htab->sstub->_cooked_size;
3402 htab->sstub->_cooked_size = 0;
3403
3404 /* Build the .glink plt call stub. */
3405 plt_r2 = (htab->splt->output_section->vma
3406 + htab->splt->output_offset
3407 - elf_gp (obfd)
3408 - TOC_BASE_OFF);
3409 p = htab->sglink->contents;
3410 p = build_plt_stub (htab->sglink->owner, p, (int) plt_r2, 1);
3411 while (p - htab->sglink->contents < GLINK_CALL_STUB_SIZE)
3412 {
3413 bfd_put_32 (htab->sglink->owner, NOP, p);
3414 p += 4;
3415 }
3416 htab->sglink->_cooked_size = p - htab->sglink->contents;
3417
3418 /* Use reloc_count to count entries. */
3419 htab->sglink->reloc_count = 0;
3420
3421 elf_link_hash_traverse (&htab->elf, build_one_stub, (PTR) info);
3422 htab->sglink->reloc_count = 0;
3423
3424 if (htab->plt_overflow)
3425 return false;
3426
3427 if (old_stub_size != htab->sstub->_cooked_size
3428 || htab->sglink->_raw_size != htab->sglink->_cooked_size)
3429 {
3430 (*_bfd_error_handler)
3431 (_("stub section size doesn't match calculated size"));
3432 bfd_set_error (bfd_error_bad_value);
3433 return false;
3434 }
3435 return true;
5bd4f169
AM		 3436}
3437
3438/* Set up any other section flags and such that may be necessary. */
3439
3440static boolean
3441ppc64_elf_fake_sections (abfd, shdr, asect)
3442 bfd *abfd ATTRIBUTE_UNUSED;
3443 Elf64_Internal_Shdr *shdr;
3444 asection *asect;
3445{
3446 if ((asect->flags & SEC_EXCLUDE) != 0)
3447 shdr->sh_flags |= SHF_EXCLUDE;
3448
3449 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
3450 shdr->sh_type = SHT_ORDERED;
3451
3452 return true;
3453}
3454
3455/* The RELOCATE_SECTION function is called by the ELF backend linker
3456 to handle the relocations for a section.
3457
3458 The relocs are always passed as Rela structures; if the section
3459 actually uses Rel structures, the r_addend field will always be
3460 zero.
3461
3462 This function is responsible for adjust the section contents as
3463 necessary, and (if using Rela relocs and generating a
3464 relocateable output file) adjusting the reloc addend as
3465 necessary.
3466
3467 This function does not have to worry about setting the reloc
3468 address or the reloc symbol index.
3469
3470 LOCAL_SYMS is a pointer to the swapped in local symbols.
3471
3472 LOCAL_SECTIONS is an array giving the section in the input file
3473 corresponding to the st_shndx field of each local symbol.
3474
3475 The global hash table entry for the global symbols can be found
3476 via elf_sym_hashes (input_bfd).
3477
3478 When generating relocateable output, this function must handle
3479 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
3480 going to be the section symbol corresponding to the output
3481 section, which means that the addend must be adjusted
3482 accordingly. */
3483
3484static boolean
3485ppc64_elf_relocate_section (output_bfd, info, input_bfd, input_section,
3486 contents, relocs, local_syms, local_sections)
3487 bfd *output_bfd;
3488 struct bfd_link_info *info;
3489 bfd *input_bfd;
3490 asection *input_section;
3491 bfd_byte *contents;
3492 Elf_Internal_Rela *relocs;
3493 Elf_Internal_Sym *local_syms;
3494 asection **local_sections;
3495{
65f38f15 3496 struct ppc_link_hash_table *htab;
5bd4f169
AM		 3497 Elf_Internal_Shdr *symtab_hdr;
3498 struct elf_link_hash_entry **sym_hashes;
5bd4f169
AM		 3499 Elf_Internal_Rela *rel;
3500 Elf_Internal_Rela *relend;
5bd4f169
AM		 3501 bfd_vma *local_got_offsets;
3502 bfd_vma TOCstart;
3503 boolean ret = true;
5bd4f169 3504
65f38f15 3505 /* Initialize howto table if needed. */
5bd4f169 3506 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5bd4f169
AM		 3507 ppc_howto_init ();
3508
65f38f15 3509 htab = ppc_hash_table (info);
5bd4f169 3510 local_got_offsets = elf_local_got_offsets (input_bfd);
5bd4f169 3511 TOCstart = elf_gp (output_bfd);
5bd4f169
AM		 3512 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3513 sym_hashes = elf_sym_hashes (input_bfd);
65f38f15 3514
5bd4f169
AM		 3515 rel = relocs;
3516 relend = relocs + input_section->reloc_count;
3517 for (; rel < relend; rel++)
3518 {
3519 enum elf_ppc_reloc_type r_type;
3520 bfd_vma offset;
3521 bfd_vma addend;
3522 bfd_reloc_status_type r;
3523 Elf_Internal_Sym *sym;
3524 asection *sec;
3525 struct elf_link_hash_entry *h;
3526 const char *sym_name;
5bd4f169
AM		 3527 unsigned long r_symndx;
3528 bfd_vma relocation;
65f38f15 3529 boolean unresolved_reloc;
e86ce104 3530 boolean has_nop;
dc810e39 3531 long insn;
5bd4f169
AM		 3532
3533 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
5bd4f169
AM		 3534 r_symndx = ELF64_R_SYM (rel->r_info);
3535
3536 if (info->relocateable)
3537 {
3538 /* This is a relocatable link. We don't have to change
3539 anything, unless the reloc is against a section symbol,
3540 in which case we have to adjust according to where the
3541 section symbol winds up in the output section. */
3542 if (r_symndx < symtab_hdr->sh_info)
3543 {
3544 sym = local_syms + r_symndx;
3545 if ((unsigned) ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3546 {
3547 sec = local_sections[r_symndx];
65f38f15 3548 rel->r_addend += sec->output_offset + sym->st_value;
5bd4f169
AM		 3549 }
3550 }
5bd4f169
AM		 3551 continue;
3552 }
3553
3554 /* This is a final link. */
3555
65f38f15
AM		 3556 offset = rel->r_offset;
3557 addend = rel->r_addend;
3558 r = bfd_reloc_other;
3559 sym = (Elf_Internal_Sym *) 0;
3560 sec = (asection *) 0;
3561 h = (struct elf_link_hash_entry *) 0;
3562 sym_name = (const char *) 0;
3563 unresolved_reloc = false;
3564
5bd4f169
AM		 3565 if (r_type == R_PPC64_TOC)
3566 {
3567 /* Relocation value is TOC base. Symbol is ignored. */
3568 relocation = TOCstart + TOC_BASE_OFF;
3569 }
3570 else if (r_symndx < symtab_hdr->sh_info)
3571 {
3572 /* It's a local symbol. */
3573 sym = local_syms + r_symndx;
3574 sec = local_sections[r_symndx];
3575 sym_name = "<local symbol>";
3576
f8df10f4
JJ		 3577 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
3578 addend = rel->r_addend;
5bd4f169
AM		 3579 }
3580 else
3581 {
3582 /* It's a global symbol. */
3583 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3584 while (h->root.type == bfd_link_hash_indirect
3585 || h->root.type == bfd_link_hash_warning)
3586 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3587 sym_name = h->root.root.string;
65f38f15 3588 relocation = 0;
5bd4f169
AM		 3589 if (h->root.type == bfd_link_hash_defined
3590 || h->root.type == bfd_link_hash_defweak)
3591 {
3592 sec = h->root.u.def.section;
65f38f15
AM		 3593 if (sec->output_section == NULL)
3594 /* Set a flag that will be cleared later if we find a
3595 relocation value for this symbol. output_section
3596 is typically NULL for symbols satisfied by a shared
3597 library. */
3598 unresolved_reloc = true;
5bd4f169
AM		 3599 else
3600 relocation = (h->root.u.def.value
3601 + sec->output_section->vma
3602 + sec->output_offset);
3603 }
3604 else if (h->root.type == bfd_link_hash_undefweak)
65f38f15 3605 ;
671bae9c 3606 else if (info->shared
65f38f15
AM		 3607 && (!info->symbolic || info->allow_shlib_undefined)
3608 && !info->no_undefined
3609 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3610 ;
5bd4f169
AM		 3611 else
3612 {
3613 if (! ((*info->callbacks->undefined_symbol)
3614 (info, h->root.root.string, input_bfd, input_section,
65f38f15
AM		 3615 offset, (!info->shared
3616 || info->no_undefined
3617 || ELF_ST_VISIBILITY (h->other)))))
5bd4f169
AM		 3618 return false;
3619 relocation = 0;
3620 }
3621 }
3622
65f38f15 3623 /* First handle relocations that tweak non-addend part of insn. */
86c76c7b 3624 insn = 0;
65f38f15 3625 switch (r_type)
5bd4f169
AM		 3626 {
3627 default:
65f38f15 3628 break;
5bd4f169 3629
65f38f15
AM		 3630 /* Branch taken prediction relocations. */
3631 case R_PPC64_ADDR14_BRTAKEN:
3632 case R_PPC64_REL14_BRTAKEN:
86c76c7b
AM		 3633 insn = 0x01 << 21; /* Set 't' bit, lowest bit of BO field. */
3634 /* Fall thru. */
65f38f15 3635
86c76c7b 3636 /* Branch not taken prediction relocations. */
65f38f15
AM		 3637 case R_PPC64_ADDR14_BRNTAKEN:
3638 case R_PPC64_REL14_BRNTAKEN:
86c76c7b
AM		 3639 insn |= bfd_get_32 (output_bfd, contents + offset) & ~(0x01 << 21);
3640 /* Set 'a' bit. This is 0b00010 in BO field for branch on CR(BI)
3641 insns (BO == 001at or 011at), and 0b01000 for branch on CTR
3642 insns (BO == 1a00t or 1a01t). */
3643 if ((insn & (0x14 << 21)) == (0x04 << 21))
3644 insn |= 0x02 << 21;
3645 else if ((insn & (0x14 << 21)) == (0x10 << 21))
3646 insn |= 0x08 << 21;
65f38f15 3647 else
86c76c7b
AM		 3648 break;
3649
65f38f15
AM		 3650 bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
3651 break;
5bd4f169 3652
65f38f15
AM		 3653 case R_PPC64_REL24:
3654 case R_PPC64_ADDR24:
5bd4f169 3655 /* An ADDR24 or REL24 branching to a linkage function may be
65f38f15 3656 followed by a nop that we have to replace with a ld in
5bd4f169
AM		 3657 order to restore the TOC base pointer. Only calls to
3658 shared objects need to alter the TOC base. These are
3659 recognized by their need for a PLT entry. */
e86ce104 3660 has_nop = 0;
5bd4f169
AM		 3661 if (h != NULL
3662 && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0
3663 /* Make sure that there really is an instruction after
3664 the branch that we can decode. */
65f38f15 3665 && offset + 8 <= input_section->_cooked_size)
5bd4f169
AM		 3666 {
3667 bfd_byte *pnext;
5bd4f169 3668
65f38f15 3669 pnext = contents + offset + 4;
5bd4f169
AM		 3670 insn = bfd_get_32 (input_bfd, pnext);
3671
3672 if (insn == 0x60000000 /* nop (ori r0,r0,0) */
3673 || insn == 0x4def7b82 /* cror 15,15,15 */
dc810e39 3674 || insn == 0x4ffffb82) /* cror 31,31,31 */
5bd4f169 3675 {
dc810e39
AM		 3676 bfd_put_32 (input_bfd,
3677 (bfd_vma) 0xe8410028, /* ld r2,40(r1) */
3678 pnext);
e86ce104 3679 has_nop = 1;
5bd4f169
AM		 3680 }
3681 }
e86ce104
AM		 3682
3683 if (h != NULL
3684 && h->root.type == bfd_link_hash_undefweak
3685 && r_type == R_PPC64_REL24
3686 && addend == 0
3687 && relocation == 0)
3688 {
3689 /* Tweak calls to undefined weak functions to behave as
3690 if the "called" function immediately returns. We can
3691 thus call to a weak function without first checking
3692 whether the function is defined. */
3693 relocation = 4;
3694 if (has_nop)
3695 relocation = 8;
3696 }
65f38f15
AM		 3697 break;
3698 }
5bd4f169 3699
65f38f15
AM		 3700 /* Set `addend'. */
3701 switch (r_type)
3702 {
3703 default:
3704 (*_bfd_error_handler)
3705 (_("%s: unknown relocation type %d for symbol %s"),
3706 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
5bd4f169 3707
65f38f15
AM		 3708 bfd_set_error (bfd_error_bad_value);
3709 ret = false;
3710 continue;
5bd4f169 3711
65f38f15
AM		 3712 case R_PPC64_NONE:
3713 case R_PPC_GNU_VTINHERIT:
3714 case R_PPC_GNU_VTENTRY:
3715 continue;
5bd4f169
AM		 3716
3717 /* GOT16 relocations. Like an ADDR16 using the symbol's
3718 address in the GOT as relocation value instead of the
3719 symbols value itself. Also, create a GOT entry for the
3720 symbol and put the symbol value there. */
65f38f15
AM		 3721 case R_PPC64_GOT16:
3722 case R_PPC64_GOT16_LO:
3723 case R_PPC64_GOT16_HI:
3724 case R_PPC64_GOT16_HA:
3725 case R_PPC64_GOT16_DS:
3726 case R_PPC64_GOT16_LO_DS:
5bd4f169
AM		 3727 {
3728 /* Relocation is to the entry for this symbol in the global
3729 offset table. */
3730 bfd_vma off;
65f38f15
AM		 3731
3732 if (htab->sgot == NULL)
3733 abort ();
5bd4f169
AM		 3734
3735 if (h != NULL)
3736 {
65f38f15 3737 boolean dyn;
5bd4f169 3738
65f38f15
AM		 3739 off = h->got.offset;
3740 dyn = htab->elf.dynamic_sections_created;
3741 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
5bd4f169 3742 || (info->shared
65f38f15
AM		 3743 && (info->symbolic
3744 || h->dynindx == -1
3745 || (h->elf_link_hash_flags
3746 & ELF_LINK_FORCED_LOCAL))
5bd4f169
AM		 3747 && (h->elf_link_hash_flags
3748 & ELF_LINK_HASH_DEF_REGULAR)))
3749 {
3750 /* This is actually a static link, or it is a
3751 -Bsymbolic link and the symbol is defined
65f38f15
AM		 3752 locally, or the symbol was forced to be local
3753 because of a version file. We must initialize
3754 this entry in the global offset table. Since the
3755 offset must always be a multiple of 8, we use the
3756 least significant bit to record whether we have
5bd4f169
AM		 3757 initialized it already.
3758
65f38f15 3759 When doing a dynamic link, we create a .rel.got
5bd4f169
AM		 3760 relocation entry to initialize the value. This
3761 is done in the finish_dynamic_symbol routine. */
3762 if ((off & 1) != 0)
3763 off &= ~1;
3764 else
3765 {
3766 bfd_put_64 (output_bfd, relocation,
65f38f15 3767 htab->sgot->contents + off);
5bd4f169
AM		 3768 h->got.offset |= 1;
3769 }
3770 }
65f38f15
AM		 3771 else
3772 unresolved_reloc = false;
5bd4f169
AM		 3773 }
3774 else
3775 {
65f38f15
AM		 3776 if (local_got_offsets == NULL)
3777 abort ();
5bd4f169
AM		 3778
3779 off = local_got_offsets[r_symndx];
3780
65f38f15 3781 /* The offset must always be a multiple of 8. We use
5bd4f169
AM		 3782 the least significant bit to record whether we have
3783 already processed this entry. */
3784 if ((off & 1) != 0)
3785 off &= ~1;
3786 else
3787 {
65f38f15
AM		 3788 bfd_put_64 (output_bfd, relocation,
3789 htab->sgot->contents + off);
5bd4f169
AM		 3790
3791 if (info->shared)
3792 {
5bd4f169 3793 Elf_Internal_Rela outrel;
65f38f15 3794 Elf64_External_Rela *loc;
5bd4f169
AM		 3795
3796 /* We need to generate a R_PPC64_RELATIVE reloc
3797 for the dynamic linker. */
65f38f15
AM		 3798 outrel.r_offset = (htab->sgot->output_section->vma
3799 + htab->sgot->output_offset
5bd4f169
AM		 3800 + off);
3801 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
3802 outrel.r_addend = relocation;
65f38f15
AM		 3803 loc = (Elf64_External_Rela *) htab->srelgot->contents;
3804 loc += htab->srelgot->reloc_count++;
3805 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
5bd4f169
AM		 3806 }
3807
3808 local_got_offsets[r_symndx] |= 1;
3809 }
3810 }
3811
65f38f15
AM		 3812 if (off >= (bfd_vma) -2)
3813 abort ();
3814
3815 relocation = htab->sgot->output_offset + off;
3816
5bd4f169
AM		 3817 /* TOC base (r2) is TOC start plus 0x8000. */
3818 addend -= TOC_BASE_OFF;
5bd4f169 3819 }
65f38f15
AM		 3820 break;
3821
3822 case R_PPC64_PLT16_HA:
3823 case R_PPC64_PLT16_HI:
3824 case R_PPC64_PLT16_LO:
3825 case R_PPC64_PLT32:
3826 case R_PPC64_PLT64:
3827 /* Relocation is to the entry for this symbol in the
3828 procedure linkage table. */
3829
3830 /* Resolve a PLT reloc against a local symbol directly,
3831 without using the procedure linkage table. */
3832 if (h == NULL)
3833 break;
3834
3835 if (h->plt.offset == (bfd_vma) -1
3836 || htab->splt == NULL)
3837 {
3838 /* We didn't make a PLT entry for this symbol. This
3839 happens when statically linking PIC code, or when
3840 using -Bsymbolic. */
3841 break;
3842 }
3843
3844 relocation = (htab->splt->output_section->vma
3845 + htab->splt->output_offset
3846 + h->plt.offset);
3847 unresolved_reloc = false;
3848 break;
5bd4f169
AM		 3849
3850 /* TOC16 relocs. We want the offset relative to the TOC base,
3851 which is the address of the start of the TOC plus 0x8000.
3852 The TOC consists of sections .got, .toc, .tocbss, and .plt,
3853 in this order. */
65f38f15
AM		 3854 case R_PPC64_TOC16:
3855 case R_PPC64_TOC16_LO:
3856 case R_PPC64_TOC16_HI:
3857 case R_PPC64_TOC16_DS:
3858 case R_PPC64_TOC16_LO_DS:
3859 case R_PPC64_TOC16_HA:
5bd4f169 3860 addend -= TOCstart + TOC_BASE_OFF;
5bd4f169
AM		 3861 break;
3862
3863 /* Relocate against the beginning of the section. */
65f38f15
AM		 3864 case R_PPC64_SECTOFF:
3865 case R_PPC64_SECTOFF_LO:
3866 case R_PPC64_SECTOFF_HI:
3867 case R_PPC64_SECTOFF_DS:
3868 case R_PPC64_SECTOFF_LO_DS:
3869 case R_PPC64_SECTOFF_HA:
3870 if (sec != (asection *) 0)
3871 addend -= sec->output_section->vma;
5bd4f169
AM		 3872 break;
3873
5d1634d7
AM		 3874 case R_PPC64_REL24:
3875 break;
3876
65f38f15
AM		 3877 /* Relocations that may need to be propagated if this is a
3878 dynamic object. */
3879 case R_PPC64_REL14:
3880 case R_PPC64_REL14_BRNTAKEN:
3881 case R_PPC64_REL14_BRTAKEN:
65f38f15
AM		 3882 case R_PPC64_REL32:
3883 case R_PPC64_REL64:
3884 case R_PPC64_ADDR14:
3885 case R_PPC64_ADDR14_BRNTAKEN:
3886 case R_PPC64_ADDR14_BRTAKEN:
3887 case R_PPC64_ADDR16:
3888 case R_PPC64_ADDR16_DS:
3889 case R_PPC64_ADDR16_HA:
3890 case R_PPC64_ADDR16_HI:
3891 case R_PPC64_ADDR16_HIGHER:
3892 case R_PPC64_ADDR16_HIGHERA:
3893 case R_PPC64_ADDR16_HIGHEST:
3894 case R_PPC64_ADDR16_HIGHESTA:
3895 case R_PPC64_ADDR16_LO:
3896 case R_PPC64_ADDR16_LO_DS:
3897 case R_PPC64_ADDR24:
3898 case R_PPC64_ADDR30:
3899 case R_PPC64_ADDR32:
3900 case R_PPC64_ADDR64:
3901 case R_PPC64_UADDR16:
3902 case R_PPC64_UADDR32:
3903 case R_PPC64_UADDR64:
ec338859
AM		 3904 /* r_symndx will be zero only for relocs against symbols
3905 from removed linkonce sections, or sections discarded by
3906 a linker script. */
5d1634d7
AM		 3907 if (r_symndx == 0)
3908 break;
3909 /* Fall thru. */
3910
3911 case R_PPC64_TOC:
3912 if ((input_section->flags & SEC_ALLOC) == 0)
ec338859
AM		 3913 break;
3914
65f38f15 3915 if ((info->shared
65f38f15
AM		 3916 && (IS_ABSOLUTE_RELOC (r_type)
3917 || (h != NULL
3918 && h->dynindx != -1
3919 && (! info->symbolic
3920 || (h->elf_link_hash_flags
3921 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3922 || (!info->shared
65f38f15
AM		 3923 && h != NULL
3924 && h->dynindx != -1
3925 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3926 && (((h->elf_link_hash_flags
3927 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3928 && (h->elf_link_hash_flags
3929 & ELF_LINK_HASH_DEF_REGULAR) == 0)
3930 || h->root.type == bfd_link_hash_undefweak
3931 || h->root.type == bfd_link_hash_undefined)))
3932 {
3933 Elf_Internal_Rela outrel;
3934 boolean skip, relocate;
3935 asection *sreloc;
3936 Elf64_External_Rela *loc;
3937
5d1634d7
AM		 3938#if 0
3939 if (strcmp (bfd_get_section_name (output_bfd, input_section),
3940 ".opd") == 0)
3941 break;
3942#endif
3943
65f38f15
AM		 3944 /* When generating a dynamic object, these relocations
3945 are copied into the output file to be resolved at run
3946 time. */
3947
3948 skip = false;
3949
c629eae0
JJ		 3950 outrel.r_offset =
3951 _bfd_elf_section_offset (output_bfd, info, input_section,
3952 rel->r_offset);
3953 if (outrel.r_offset == (bfd_vma) -1)
3954 skip = true;
65f38f15
AM		 3955
3956 outrel.r_offset += (input_section->output_section->vma
3957 + input_section->output_offset);
3958 outrel.r_addend = addend;
3959
3960 if (skip)
3961 {
3962 relocate = false;
3963 memset (&outrel, 0, sizeof outrel);
3964 }
3965 else if (h != NULL
3966 && h->dynindx != -1
3967 && (!IS_ABSOLUTE_RELOC (r_type)
3968 || !info->shared
3969 || !info->symbolic
3970 || (h->elf_link_hash_flags
3971 & ELF_LINK_HASH_DEF_REGULAR) == 0))
3972 {
3973 relocate = false;
3974 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
3975 }
3976 else
3977 {
3978 /* This symbol is local, or marked to become local. */
3979 outrel.r_addend += relocation;
3980 relocate = true;
e86ce104 3981 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
65f38f15
AM		 3982 {
3983 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
3984 }
3985 else
3986 {
3987 long indx = 0;
3988
3989 if (r_type == R_PPC64_TOC || bfd_is_abs_section (sec))
3990 ;
3991 else if (sec == NULL || sec->owner == NULL)
3992 {
3993 bfd_set_error (bfd_error_bad_value);
3994 return false;
3995 }
3996 else
3997 {
3998 asection *osec;
3999
4000 osec = sec->output_section;
4001 indx = elf_section_data (osec)->dynindx;
4002
4003 /* We are turning this relocation into one
4004 against a section symbol, so subtract out
4005 the output section's address but not the
4006 offset of the input section in the output
4007 section. */
4008 outrel.r_addend -= osec->vma;
4009 }
4010
4011 outrel.r_info = ELF64_R_INFO (indx, r_type);
4012 }
4013 }
4014
4015 sreloc = elf_section_data (input_section)->sreloc;
4016 if (sreloc == NULL)
4017 abort ();
4018
4019 loc = (Elf64_External_Rela *) sreloc->contents;
4020 loc += sreloc->reloc_count++;
4021 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
4022
4023 /* If this reloc is against an external symbol, it will
4024 be computed at runtime, so there's no need to do
4025 anything now. */
4026 if (! relocate)
4027 continue;
4028 }
5bd4f169
AM		 4029 break;
4030
65f38f15
AM		 4031 case R_PPC64_COPY:
4032 case R_PPC64_GLOB_DAT:
4033 case R_PPC64_JMP_SLOT:
4034 case R_PPC64_RELATIVE:
4035 /* We shouldn't ever see these dynamic relocs in relocatable
4036 files. */
4037 /* Fall thru */
4038
4039 case R_PPC64_PLTGOT16:
4040 case R_PPC64_PLTGOT16_DS:
4041 case R_PPC64_PLTGOT16_HA:
4042 case R_PPC64_PLTGOT16_HI:
4043 case R_PPC64_PLTGOT16_LO:
4044 case R_PPC64_PLTGOT16_LO_DS:
4045 case R_PPC64_PLTREL32:
4046 case R_PPC64_PLTREL64:
4047 /* These ones haven't been implemented yet. */
4048
4049 (*_bfd_error_handler)
4050 (_("%s: Relocation %s is not supported for symbol %s."),
4051 bfd_archive_filename (input_bfd),
4052 ppc64_elf_howto_table[(int) r_type]->name, sym_name);
5bd4f169
AM		 4053
4054 bfd_set_error (bfd_error_invalid_operation);
4055 ret = false;
4056 continue;
65f38f15 4057 }
5bd4f169 4058
65f38f15
AM		 4059 /* Do any further special processing. */
4060 switch (r_type)
4061 {
4062 default:
4063 break;
4064
4065 case R_PPC64_ADDR16_HA:
4066 case R_PPC64_ADDR16_HIGHERA:
4067 case R_PPC64_ADDR16_HIGHESTA:
4068 case R_PPC64_PLT16_HA:
4069 case R_PPC64_TOC16_HA:
4070 case R_PPC64_SECTOFF_HA:
4071 /* It's just possible that this symbol is a weak symbol
4072 that's not actually defined anywhere. In that case,
4073 'sec' would be NULL, and we should leave the symbol
4074 alone (it will be set to zero elsewhere in the link). */
4075 if (sec != NULL)
4076 /* Add 0x10000 if sign bit in 0:15 is set. */
4077 addend += ((relocation + addend) & 0x8000) << 1;
4078 break;
4079
4080 case R_PPC64_ADDR16_DS:
4081 case R_PPC64_ADDR16_LO_DS:
4082 case R_PPC64_GOT16_DS:
4083 case R_PPC64_GOT16_LO_DS:
4084 case R_PPC64_PLT16_LO_DS:
4085 case R_PPC64_SECTOFF_DS:
4086 case R_PPC64_SECTOFF_LO_DS:
4087 case R_PPC64_TOC16_DS:
4088 case R_PPC64_TOC16_LO_DS:
4089 case R_PPC64_PLTGOT16_DS:
4090 case R_PPC64_PLTGOT16_LO_DS:
4091 if (((relocation + addend) & 3) != 0)
4092 {
4093 (*_bfd_error_handler)
4094 (_("%s: error: relocation %s not a multiple of 4"),
4095 bfd_archive_filename (input_bfd),
4096 ppc64_elf_howto_table[(int) r_type]->name);
4097 bfd_set_error (bfd_error_bad_value);
4098 ret = false;
4099 continue;
4100 }
4101 break;
5bd4f169
AM		 4102 }
4103
65f38f15
AM		 4104 /* FIXME: Why do we allow debugging sections to escape this error?
4105 More importantly, why do we not emit dynamic relocs above in
4106 debugging sections (which are ! SEC_ALLOC)? If we had
4107 emitted the dynamic reloc, we could remove the fudge here. */
4108 if (unresolved_reloc
4109 && !(info->shared
4110 && (input_section->flags & SEC_DEBUGGING) != 0
4111 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
4112 (*_bfd_error_handler)
4113 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
4114 bfd_archive_filename (input_bfd),
4115 bfd_get_section_name (input_bfd, input_section),
4116 (long) rel->r_offset,
4117 h->root.root.string);
5bd4f169 4118
65f38f15 4119 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
5bd4f169
AM		 4120 input_bfd,
4121 input_section,
4122 contents,
4123 offset,
4124 relocation,
4125 addend);
4126
4127 if (r == bfd_reloc_ok)
4128 ;
4129 else if (r == bfd_reloc_overflow)
4130 {
4131 const char *name;
4132
4133 if (h != NULL)
4134 {
4135 if (h->root.type == bfd_link_hash_undefweak
65f38f15 4136 && ppc64_elf_howto_table[(int) r_type]->pc_relative)
5bd4f169
AM		 4137 {
4138 /* Assume this is a call protected by other code that
4139 detects the symbol is undefined. If this is the case,
4140 we can safely ignore the overflow. If not, the
4141 program is hosed anyway, and a little warning isn't
4142 going to help. */
4143
4144 continue;
4145 }
4146
4147 name = h->root.root.string;
4148 }
4149 else
4150 {
4151 name = bfd_elf_string_from_elf_section (input_bfd,
4152 symtab_hdr->sh_link,
4153 sym->st_name);
4154 if (name == NULL)
4155 continue;
4156 if (*name == '\0')
4157 name = bfd_section_name (input_bfd, sec);
4158 }
4159
65f38f15
AM		 4160 if (! ((*info->callbacks->reloc_overflow)
4161 (info, name, ppc64_elf_howto_table[(int) r_type]->name,
4162 (bfd_vma) 0, input_bfd, input_section, offset)))
5bd4f169
AM		 4163 return false;
4164 }
4165 else
4166 ret = false;
4167 }
4168
5bd4f169
AM		 4169 return ret;
4170}
4171
4172/* Finish up dynamic symbol handling. We set the contents of various
4173 dynamic sections here. */
4174
4175static boolean
4176ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
4177 bfd *output_bfd;
4178 struct bfd_link_info *info;
4179 struct elf_link_hash_entry *h;
4180 Elf_Internal_Sym *sym;
4181{
65f38f15 4182 struct ppc_link_hash_table *htab;
5bd4f169
AM		 4183 bfd *dynobj;
4184
65f38f15
AM		 4185 htab = ppc_hash_table (info);
4186 dynobj = htab->elf.dynobj;
5bd4f169
AM		 4187
4188 if (h->plt.offset != (bfd_vma) -1)
4189 {
65f38f15
AM		 4190 Elf_Internal_Rela rela;
4191 Elf64_External_Rela *loc;
5bd4f169
AM		 4192
4193 /* This symbol has an entry in the procedure linkage table. Set
4194 it up. */
4195
5d1634d7 4196 if (htab->splt == NULL
65f38f15 4197 || htab->srelplt == NULL
e86ce104 4198 || htab->sglink == NULL)
65f38f15
AM		 4199 abort ();
4200
e86ce104 4201 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
65f38f15
AM		 4202
4203 /* Create a JMP_SLOT reloc to inform the dynamic linker to
4204 fill in the PLT entry. */
5bd4f169 4205
65f38f15
AM		 4206 rela.r_offset = (htab->splt->output_section->vma
4207 + htab->splt->output_offset
4208 + h->plt.offset);
e86ce104 4209 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
65f38f15
AM		 4210 rela.r_addend = 0;
4211
4212 loc = (Elf64_External_Rela *) htab->srelplt->contents;
4213 loc += (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
4214 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
5bd4f169
AM		 4215 }
4216
4217 if (h->got.offset != (bfd_vma) -1)
4218 {
5bd4f169 4219 Elf_Internal_Rela rela;
65f38f15 4220 Elf64_External_Rela *loc;
5bd4f169
AM		 4221
4222 /* This symbol has an entry in the global offset table. Set it
4223 up. */
4224
65f38f15
AM		 4225 if (htab->sgot == NULL || htab->srelgot == NULL)
4226 abort ();
5bd4f169 4227
65f38f15
AM		 4228 rela.r_offset = (htab->sgot->output_section->vma
4229 + htab->sgot->output_offset
dc810e39 4230 + (h->got.offset &~ (bfd_vma) 1));
5bd4f169 4231
65f38f15
AM		 4232 /* If this is a static link, or it is a -Bsymbolic link and the
4233 symbol is defined locally or was forced to be local because
4234 of a version file, we just want to emit a RELATIVE reloc.
4235 The entry in the global offset table will already have been
4236 initialized in the relocate_section function. */
5bd4f169 4237 if (info->shared
65f38f15
AM		 4238 && (info->symbolic
4239 || h->dynindx == -1
4240 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
5bd4f169
AM		 4241 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
4242 {
65f38f15 4243 BFD_ASSERT((h->got.offset & 1) != 0);
5bd4f169
AM		 4244 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
4245 rela.r_addend = (h->root.u.def.value
4246 + h->root.u.def.section->output_section->vma
4247 + h->root.u.def.section->output_offset);
4248 }
4249 else
4250 {
4251 BFD_ASSERT ((h->got.offset & 1) == 0);
65f38f15
AM		 4252 bfd_put_64 (output_bfd, (bfd_vma) 0,
4253 htab->sgot->contents + h->got.offset);
5bd4f169
AM		 4254 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_GLOB_DAT);
4255 rela.r_addend = 0;
4256 }
4257
65f38f15
AM		 4258 loc = (Elf64_External_Rela *) htab->srelgot->contents;
4259 loc += htab->srelgot->reloc_count++;
4260 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
5bd4f169
AM		 4261 }
4262
4263 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4264 {
5bd4f169 4265 Elf_Internal_Rela rela;
65f38f15 4266 Elf64_External_Rela *loc;
5bd4f169 4267
65f38f15 4268 /* This symbol needs a copy reloc. Set it up. */
5bd4f169 4269
65f38f15
AM		 4270 if (h->dynindx == -1
4271 || (h->root.type != bfd_link_hash_defined
4272 && h->root.type != bfd_link_hash_defweak)
4273 || htab->srelbss == NULL)
4274 abort ();
5bd4f169
AM		 4275
4276 rela.r_offset = (h->root.u.def.value
4277 + h->root.u.def.section->output_section->vma
4278 + h->root.u.def.section->output_offset);
4279 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
4280 rela.r_addend = 0;
65f38f15
AM		 4281 loc = (Elf64_External_Rela *) htab->srelbss->contents;
4282 loc += htab->srelbss->reloc_count++;
4283 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
5bd4f169
AM		 4284 }
4285
5bd4f169
AM		 4286 /* Mark some specially defined symbols as absolute. */
4287 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
4288 sym->st_shndx = SHN_ABS;
4289
4290 return true;
4291}
4292
65f38f15
AM		 4293/* Used to decide how to sort relocs in an optimal manner for the
4294 dynamic linker, before writing them out. */
4295
4296static enum elf_reloc_type_class
4297ppc64_elf_reloc_type_class (rela)
4298 const Elf_Internal_Rela *rela;
4299{
a33d1f77
AM		 4300 enum elf_ppc_reloc_type r_type;
4301
4302 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rela->r_info);
4303 switch (r_type)
65f38f15
AM		 4304 {
4305 case R_PPC64_RELATIVE:
4306 return reloc_class_relative;
4307 case R_PPC64_JMP_SLOT:
4308 return reloc_class_plt;
4309 case R_PPC64_COPY:
4310 return reloc_class_copy;
4311 default:
4312 return reloc_class_normal;
4313 }
4314}
4315
5bd4f169
AM		 4316/* Finish up the dynamic sections. */
4317
4318static boolean
4319ppc64_elf_finish_dynamic_sections (output_bfd, info)
4320 bfd *output_bfd;
4321 struct bfd_link_info *info;
4322{
65f38f15
AM		 4323 struct ppc_link_hash_table *htab;
4324 bfd *dynobj;
5bd4f169 4325 asection *sdyn;
5bd4f169 4326
65f38f15
AM		 4327 htab = ppc_hash_table (info);
4328 dynobj = htab->elf.dynobj;
5bd4f169
AM		 4329 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4330
65f38f15 4331 if (htab->elf.dynamic_sections_created)
5bd4f169 4332 {
5bd4f169
AM		 4333 Elf64_External_Dyn *dyncon, *dynconend;
4334
65f38f15
AM		 4335 if (sdyn == NULL || htab->sgot == NULL)
4336 abort ();
5bd4f169
AM		 4337
4338 dyncon = (Elf64_External_Dyn *) sdyn->contents;
4339 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4340 for (; dyncon < dynconend; dyncon++)
4341 {
4342 Elf_Internal_Dyn dyn;
5bd4f169
AM		 4343
4344 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
4345
4346 switch (dyn.d_tag)
4347 {
65f38f15
AM		 4348 default:
4349 continue;
5bd4f169 4350
5d1634d7
AM		 4351 case DT_PPC64_GLINK:
4352 dyn.d_un.d_ptr = (htab->sglink->output_section->vma
4353 + htab->sglink->output_offset);
4354 break;
4355
65f38f15 4356 case DT_PLTGOT:
5d1634d7
AM		 4357 dyn.d_un.d_ptr = (htab->splt->output_section->vma
4358 + htab->splt->output_offset);
65f38f15
AM		 4359 break;
4360
4361 case DT_JMPREL:
5d1634d7
AM		 4362 dyn.d_un.d_ptr = (htab->srelplt->output_section->vma
4363 + htab->srelplt->output_offset);
65f38f15 4364 break;
5bd4f169 4365
65f38f15 4366 case DT_PLTRELSZ:
5d1634d7
AM		 4367 dyn.d_un.d_val = htab->srelplt->_raw_size;
4368 break;
4369
4370 case DT_RELASZ:
4371 /* Don't count procedure linkage table relocs in the
4372 overall reloc count. */
4373 if (htab->srelplt != NULL)
4374 dyn.d_un.d_val -= htab->srelplt->_raw_size;
65f38f15 4375 break;
5bd4f169 4376 }
5bd4f169 4377
65f38f15 4378 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
5bd4f169 4379 }
5bd4f169
AM		 4380 }
4381
5d1634d7
AM		 4382 if (htab->sgot != NULL && htab->sgot->_raw_size != 0)
4383 {
4384 /* Fill in the first entry in the global offset table.
4385 We use it to hold the link-time TOCbase. */
4386 bfd_put_64 (output_bfd,
4387 elf_gp (output_bfd) - TOC_BASE_OFF,
4388 htab->sgot->contents);
4389
4390 /* Set .got entry size. */
4391 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8;
4392 }
4393
4394 if (htab->splt != NULL && htab->splt->_raw_size != 0)
4395 {
4396 /* Set .plt entry size. */
4397 elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize
4398 = PLT_ENTRY_SIZE;
4399 }
4400
5bd4f169
AM		 4401 return true;
4402}
4403
4404#define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
4405#define TARGET_LITTLE_NAME "elf64-powerpcle"
4406#define TARGET_BIG_SYM bfd_elf64_powerpc_vec
4407#define TARGET_BIG_NAME "elf64-powerpc"
4408#define ELF_ARCH bfd_arch_powerpc
4409#define ELF_MACHINE_CODE EM_PPC64
4410#define ELF_MAXPAGESIZE 0x10000
4411#define elf_info_to_howto ppc64_elf_info_to_howto
4412
4413#ifdef EM_CYGNUS_POWERPC
4414#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
4415#endif
4416
4417#ifdef EM_PPC_OLD
4418#define ELF_MACHINE_ALT2 EM_PPC_OLD
4419#endif
4420
4421#define elf_backend_want_got_sym 0
4422#define elf_backend_want_plt_sym 0
4423#define elf_backend_plt_alignment 3
4424#define elf_backend_plt_not_loaded 1
4425#define elf_backend_got_symbol_offset 0
5d1634d7
AM		 4426#define elf_backend_got_header_size 8
4427#define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
5bd4f169 4428#define elf_backend_can_gc_sections 1
65f38f15 4429#define elf_backend_can_refcount 1
5bd4f169 4430
65f38f15
AM		 4431#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
4432#define bfd_elf64_bfd_set_private_flags ppc64_elf_set_private_flags
65f38f15
AM		 4433#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
4434#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
65f38f15
AM		 4435
4436#define elf_backend_section_from_shdr ppc64_elf_section_from_shdr
4437#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
4438#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
4439#define elf_backend_check_relocs ppc64_elf_check_relocs
4440#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
4441#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
4442#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
e86ce104
AM		 4443#define elf_backend_hide_symbol ppc64_elf_hide_symbol
4444#define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
65f38f15
AM		 4445#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
4446#define elf_backend_fake_sections ppc64_elf_fake_sections
4447#define elf_backend_relocate_section ppc64_elf_relocate_section
4448#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
4449#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
4450#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
5bd4f169
AM		 4451
4452#include "elf64-target.h"
GDB Binutils - Deliverables
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