projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
* elf64-sparc.c (sparc64_elf_relocate_section): Adjust addend of
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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"
31 #include "elf64-ppc.h"
32
33 static void ppc_howto_init
34 PARAMS ((void));
35 static reloc_howto_type *ppc64_elf_reloc_type_lookup
36 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
37 static void ppc64_elf_info_to_howto
38 PARAMS ((bfd *abfd, arelent *cache_ptr, Elf64_Internal_Rela *dst));
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
41 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
42 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
43 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
44 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
45 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
46 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
47 static bfd_reloc_status_type ppc64_elf_toc_reloc
48 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
49 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
50 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
51 static bfd_reloc_status_type ppc64_elf_toc64_reloc
52 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
53 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
54 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
55 static boolean ppc64_elf_object_p
56 PARAMS ((bfd *));
57 static boolean ppc64_elf_merge_private_bfd_data
58 PARAMS ((bfd *, bfd *));
59
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* The size in bytes of an entry in the procedure linkage table. */
66 #define PLT_ENTRY_SIZE 24
67
68 /* The initial size of the plt reserved for the dynamic linker. */
69 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
70
71 /* TOC base pointers offset from start of TOC. */
72 #define TOC_BASE_OFF (0x8000)
73
74 /* .plt call stub instructions. */
75 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
76 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
77 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
78 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
79 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
80 /* ld %r11,xxx+16@l(%r12) */
81 #define BCTR 0x4e800420 /* bctr */
82
83 /* The normal stub is this size. */
84 #define PLT_CALL_STUB_SIZE (7*4)
85
86 /* But sometimes the .plt entry crosses a 64k boundary, and we need
87 to adjust the high word with this insn. */
88 #define ADDIS_R12_R12_1 0x3d8c0001 /* addis %r12,%r12,1 */
89
90 /* The .glink fixup call stub is the same as the .plt call stub, but
91 the first instruction restores r2, and the std is omitted. */
92 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
93
94 /* Always allow this much space. */
95 #define GLINK_CALL_STUB_SIZE (8*4)
96
97 /* Pad with this. */
98 #define NOP 0x60000000
99
100 /* Some other nops. */
101 #define CROR_151515 0x4def7b82
102 #define CROR_313131 0x4ffffb82
103
104 /* .glink entries for the first 32k functions are two instructions. */
105 #define LI_R0_0 0x38000000 /* li %r0,0 */
106 #define B_DOT 0x48000000 /* b . */
107
108 /* After that, we need two instructions to load the index, followed by
109 a branch. */
110 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
111 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
112
113 /* Instructions to save and restore floating point regs. */
114 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
115 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
116 #define BLR 0x4e800020 /* blr */
117
118 /* Since .opd is an array of descriptors and each entry will end up
119 with identical R_PPC64_RELATIVE relocs, there is really no need to
120 propagate .opd relocs; The dynamic linker should be taught to
121 relocate .opd without reloc entries. */
122 #ifndef NO_OPD_RELOCS
123 #define NO_OPD_RELOCS 0
124 #endif
125 \f
126 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
127
128 /* Relocation HOWTO's. */
129 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC_max];
130
131 static reloc_howto_type ppc64_elf_howto_raw[] = {
132 /* This reloc does nothing. */
133 HOWTO (R_PPC64_NONE, /* type */
134 0, /* rightshift */
135 0, /* size (0 = byte, 1 = short, 2 = long) */
136 8, /* bitsize */
137 false, /* pc_relative */
138 0, /* bitpos */
139 complain_overflow_dont, /* complain_on_overflow */
140 bfd_elf_generic_reloc, /* special_function */
141 "R_PPC64_NONE", /* name */
142 false, /* partial_inplace */
143 0, /* src_mask */
144 0, /* dst_mask */
145 false), /* pcrel_offset */
146
147 /* A standard 32 bit relocation. */
148 HOWTO (R_PPC64_ADDR32, /* type */
149 0, /* rightshift */
150 2, /* size (0 = byte, 1 = short, 2 = long) */
151 32, /* bitsize */
152 false, /* pc_relative */
153 0, /* bitpos */
154 complain_overflow_bitfield, /* complain_on_overflow */
155 bfd_elf_generic_reloc, /* special_function */
156 "R_PPC64_ADDR32", /* name */
157 false, /* partial_inplace */
158 0, /* src_mask */
159 0xffffffff, /* dst_mask */
160 false), /* pcrel_offset */
161
162 /* An absolute 26 bit branch; the lower two bits must be zero.
163 FIXME: we don't check that, we just clear them. */
164 HOWTO (R_PPC64_ADDR24, /* type */
165 0, /* rightshift */
166 2, /* size (0 = byte, 1 = short, 2 = long) */
167 26, /* bitsize */
168 false, /* pc_relative */
169 0, /* bitpos */
170 complain_overflow_bitfield, /* complain_on_overflow */
171 bfd_elf_generic_reloc, /* special_function */
172 "R_PPC64_ADDR24", /* name */
173 false, /* partial_inplace */
174 0, /* src_mask */
175 0x03fffffc, /* dst_mask */
176 false), /* pcrel_offset */
177
178 /* A standard 16 bit relocation. */
179 HOWTO (R_PPC64_ADDR16, /* type */
180 0, /* rightshift */
181 1, /* size (0 = byte, 1 = short, 2 = long) */
182 16, /* bitsize */
183 false, /* pc_relative */
184 0, /* bitpos */
185 complain_overflow_bitfield, /* complain_on_overflow */
186 bfd_elf_generic_reloc, /* special_function */
187 "R_PPC64_ADDR16", /* name */
188 false, /* partial_inplace */
189 0, /* src_mask */
190 0xffff, /* dst_mask */
191 false), /* pcrel_offset */
192
193 /* A 16 bit relocation without overflow. */
194 HOWTO (R_PPC64_ADDR16_LO, /* type */
195 0, /* rightshift */
196 1, /* size (0 = byte, 1 = short, 2 = long) */
197 16, /* bitsize */
198 false, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_dont,/* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_PPC64_ADDR16_LO", /* name */
203 false, /* partial_inplace */
204 0, /* src_mask */
205 0xffff, /* dst_mask */
206 false), /* pcrel_offset */
207
208 /* Bits 16-31 of an address. */
209 HOWTO (R_PPC64_ADDR16_HI, /* type */
210 16, /* rightshift */
211 1, /* size (0 = byte, 1 = short, 2 = long) */
212 16, /* bitsize */
213 false, /* pc_relative */
214 0, /* bitpos */
215 complain_overflow_dont, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_PPC64_ADDR16_HI", /* name */
218 false, /* partial_inplace */
219 0, /* src_mask */
220 0xffff, /* dst_mask */
221 false), /* pcrel_offset */
222
223 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
224 bits, treated as a signed number, is negative. */
225 HOWTO (R_PPC64_ADDR16_HA, /* type */
226 16, /* rightshift */
227 1, /* size (0 = byte, 1 = short, 2 = long) */
228 16, /* bitsize */
229 false, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_dont, /* complain_on_overflow */
232 ppc64_elf_ha_reloc, /* special_function */
233 "R_PPC64_ADDR16_HA", /* name */
234 false, /* partial_inplace */
235 0, /* src_mask */
236 0xffff, /* dst_mask */
237 false), /* pcrel_offset */
238
239 /* An absolute 16 bit branch; the lower two bits must be zero.
240 FIXME: we don't check that, we just clear them. */
241 HOWTO (R_PPC64_ADDR14, /* type */
242 0, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 false, /* pc_relative */
246 0, /* bitpos */
247 complain_overflow_bitfield, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_PPC64_ADDR14", /* name */
250 false, /* partial_inplace */
251 0, /* src_mask */
252 0x0000fffc, /* dst_mask */
253 false), /* pcrel_offset */
254
255 /* An absolute 16 bit branch, for which bit 10 should be set to
256 indicate that the branch is expected to be taken. The lower two
257 bits must be zero. */
258 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
259 0, /* rightshift */
260 2, /* size (0 = byte, 1 = short, 2 = long) */
261 16, /* bitsize */
262 false, /* pc_relative */
263 0, /* bitpos */
264 complain_overflow_bitfield, /* complain_on_overflow */
265 ppc64_elf_brtaken_reloc, /* special_function */
266 "R_PPC64_ADDR14_BRTAKEN",/* name */
267 false, /* partial_inplace */
268 0, /* src_mask */
269 0x0000fffc, /* dst_mask */
270 false), /* pcrel_offset */
271
272 /* An absolute 16 bit branch, for which bit 10 should be set to
273 indicate that the branch is not expected to be taken. The lower
274 two bits must be zero. */
275 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
276 0, /* rightshift */
277 2, /* size (0 = byte, 1 = short, 2 = long) */
278 16, /* bitsize */
279 false, /* pc_relative */
280 0, /* bitpos */
281 complain_overflow_bitfield, /* complain_on_overflow */
282 ppc64_elf_brtaken_reloc, /* special_function */
283 "R_PPC64_ADDR14_BRNTAKEN",/* name */
284 false, /* partial_inplace */
285 0, /* src_mask */
286 0x0000fffc, /* dst_mask */
287 false), /* pcrel_offset */
288
289 /* A relative 26 bit branch; the lower two bits must be zero. */
290 HOWTO (R_PPC64_REL24, /* type */
291 0, /* rightshift */
292 2, /* size (0 = byte, 1 = short, 2 = long) */
293 26, /* bitsize */
294 true, /* pc_relative */
295 0, /* bitpos */
296 complain_overflow_signed, /* complain_on_overflow */
297 bfd_elf_generic_reloc, /* special_function */
298 "R_PPC64_REL24", /* name */
299 false, /* partial_inplace */
300 0, /* src_mask */
301 0x03fffffc, /* dst_mask */
302 true), /* pcrel_offset */
303
304 /* A relative 16 bit branch; the lower two bits must be zero. */
305 HOWTO (R_PPC64_REL14, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 true, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_signed, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_REL14", /* name */
314 false, /* partial_inplace */
315 0, /* src_mask */
316 0x0000fffc, /* dst_mask */
317 true), /* pcrel_offset */
318
319 /* A relative 16 bit branch. Bit 10 should be set to indicate that
320 the branch is expected to be taken. The lower two bits must be
321 zero. */
322 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 true, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_signed, /* complain_on_overflow */
329 ppc64_elf_brtaken_reloc, /* special_function */
330 "R_PPC64_REL14_BRTAKEN", /* name */
331 false, /* partial_inplace */
332 0, /* src_mask */
333 0x0000fffc, /* dst_mask */
334 true), /* pcrel_offset */
335
336 /* A relative 16 bit branch. Bit 10 should be set to indicate that
337 the branch is not expected to be taken. The lower two bits must
338 be zero. */
339 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
340 0, /* rightshift */
341 2, /* size (0 = byte, 1 = short, 2 = long) */
342 16, /* bitsize */
343 true, /* pc_relative */
344 0, /* bitpos */
345 complain_overflow_signed, /* complain_on_overflow */
346 ppc64_elf_brtaken_reloc, /* special_function */
347 "R_PPC64_REL14_BRNTAKEN",/* name */
348 false, /* partial_inplace */
349 0, /* src_mask */
350 0x0000fffc, /* dst_mask */
351 true), /* pcrel_offset */
352
353 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
354 symbol. */
355 HOWTO (R_PPC64_GOT16, /* type */
356 0, /* rightshift */
357 1, /* size (0 = byte, 1 = short, 2 = long) */
358 16, /* bitsize */
359 false, /* pc_relative */
360 0, /* bitpos */
361 complain_overflow_signed, /* complain_on_overflow */
362 ppc64_elf_unhandled_reloc, /* special_function */
363 "R_PPC64_GOT16", /* name */
364 false, /* partial_inplace */
365 0, /* src_mask */
366 0xffff, /* dst_mask */
367 false), /* pcrel_offset */
368
369 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
370 the symbol. */
371 HOWTO (R_PPC64_GOT16_LO, /* type */
372 0, /* rightshift */
373 1, /* size (0 = byte, 1 = short, 2 = long) */
374 16, /* bitsize */
375 false, /* pc_relative */
376 0, /* bitpos */
377 complain_overflow_dont, /* complain_on_overflow */
378 ppc64_elf_unhandled_reloc, /* special_function */
379 "R_PPC64_GOT16_LO", /* name */
380 false, /* partial_inplace */
381 0, /* src_mask */
382 0xffff, /* dst_mask */
383 false), /* pcrel_offset */
384
385 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
386 the symbol. */
387 HOWTO (R_PPC64_GOT16_HI, /* type */
388 16, /* rightshift */
389 1, /* size (0 = byte, 1 = short, 2 = long) */
390 16, /* bitsize */
391 false, /* pc_relative */
392 0, /* bitpos */
393 complain_overflow_dont,/* complain_on_overflow */
394 ppc64_elf_unhandled_reloc, /* special_function */
395 "R_PPC64_GOT16_HI", /* name */
396 false, /* partial_inplace */
397 0, /* src_mask */
398 0xffff, /* dst_mask */
399 false), /* pcrel_offset */
400
401 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
402 the symbol. */
403 HOWTO (R_PPC64_GOT16_HA, /* type */
404 16, /* rightshift */
405 1, /* size (0 = byte, 1 = short, 2 = long) */
406 16, /* bitsize */
407 false, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_dont,/* complain_on_overflow */
410 ppc64_elf_unhandled_reloc, /* special_function */
411 "R_PPC64_GOT16_HA", /* name */
412 false, /* partial_inplace */
413 0, /* src_mask */
414 0xffff, /* dst_mask */
415 false), /* pcrel_offset */
416
417 /* This is used only by the dynamic linker. The symbol should exist
418 both in the object being run and in some shared library. The
419 dynamic linker copies the data addressed by the symbol from the
420 shared library into the object, because the object being
421 run has to have the data at some particular address. */
422 HOWTO (R_PPC64_COPY, /* type */
423 0, /* rightshift */
424 0, /* this one is variable size */
425 0, /* bitsize */
426 false, /* pc_relative */
427 0, /* bitpos */
428 complain_overflow_dont, /* complain_on_overflow */
429 ppc64_elf_unhandled_reloc, /* special_function */
430 "R_PPC64_COPY", /* name */
431 false, /* partial_inplace */
432 0, /* src_mask */
433 0, /* dst_mask */
434 false), /* pcrel_offset */
435
436 /* Like R_PPC64_ADDR64, but used when setting global offset table
437 entries. */
438 HOWTO (R_PPC64_GLOB_DAT, /* type */
439 0, /* rightshift */
440 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
441 64, /* bitsize */
442 false, /* pc_relative */
443 0, /* bitpos */
444 complain_overflow_dont, /* complain_on_overflow */
445 ppc64_elf_unhandled_reloc, /* special_function */
446 "R_PPC64_GLOB_DAT", /* name */
447 false, /* partial_inplace */
448 0, /* src_mask */
449 ONES (64), /* dst_mask */
450 false), /* pcrel_offset */
451
452 /* Created by the link editor. Marks a procedure linkage table
453 entry for a symbol. */
454 HOWTO (R_PPC64_JMP_SLOT, /* type */
455 0, /* rightshift */
456 0, /* size (0 = byte, 1 = short, 2 = long) */
457 0, /* bitsize */
458 false, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_dont, /* complain_on_overflow */
461 ppc64_elf_unhandled_reloc, /* special_function */
462 "R_PPC64_JMP_SLOT", /* name */
463 false, /* partial_inplace */
464 0, /* src_mask */
465 0, /* dst_mask */
466 false), /* pcrel_offset */
467
468 /* Used only by the dynamic linker. When the object is run, this
469 doubleword64 is set to the load address of the object, plus the
470 addend. */
471 HOWTO (R_PPC64_RELATIVE, /* type */
472 0, /* rightshift */
473 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
474 64, /* bitsize */
475 false, /* pc_relative */
476 0, /* bitpos */
477 complain_overflow_dont, /* complain_on_overflow */
478 bfd_elf_generic_reloc, /* special_function */
479 "R_PPC64_RELATIVE", /* name */
480 false, /* partial_inplace */
481 0, /* src_mask */
482 ONES (64), /* dst_mask */
483 false), /* pcrel_offset */
484
485 /* Like R_PPC64_ADDR32, but may be unaligned. */
486 HOWTO (R_PPC64_UADDR32, /* type */
487 0, /* rightshift */
488 2, /* size (0 = byte, 1 = short, 2 = long) */
489 32, /* bitsize */
490 false, /* pc_relative */
491 0, /* bitpos */
492 complain_overflow_bitfield, /* complain_on_overflow */
493 bfd_elf_generic_reloc, /* special_function */
494 "R_PPC64_UADDR32", /* name */
495 false, /* partial_inplace */
496 0, /* src_mask */
497 0xffffffff, /* dst_mask */
498 false), /* pcrel_offset */
499
500 /* Like R_PPC64_ADDR16, but may be unaligned. */
501 HOWTO (R_PPC64_UADDR16, /* type */
502 0, /* rightshift */
503 1, /* size (0 = byte, 1 = short, 2 = long) */
504 16, /* bitsize */
505 false, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_bitfield, /* complain_on_overflow */
508 bfd_elf_generic_reloc, /* special_function */
509 "R_PPC64_UADDR16", /* name */
510 false, /* partial_inplace */
511 0, /* src_mask */
512 0xffff, /* dst_mask */
513 false), /* pcrel_offset */
514
515 /* 32-bit PC relative. */
516 HOWTO (R_PPC64_REL32, /* type */
517 0, /* rightshift */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
519 32, /* bitsize */
520 true, /* pc_relative */
521 0, /* bitpos */
522 /* FIXME: Verify. Was complain_overflow_bitfield. */
523 complain_overflow_signed, /* complain_on_overflow */
524 bfd_elf_generic_reloc, /* special_function */
525 "R_PPC64_REL32", /* name */
526 false, /* partial_inplace */
527 0, /* src_mask */
528 0xffffffff, /* dst_mask */
529 true), /* pcrel_offset */
530
531 /* 32-bit relocation to the symbol's procedure linkage table. */
532 HOWTO (R_PPC64_PLT32, /* type */
533 0, /* rightshift */
534 2, /* size (0 = byte, 1 = short, 2 = long) */
535 32, /* bitsize */
536 false, /* pc_relative */
537 0, /* bitpos */
538 complain_overflow_bitfield, /* complain_on_overflow */
539 ppc64_elf_unhandled_reloc, /* special_function */
540 "R_PPC64_PLT32", /* name */
541 false, /* partial_inplace */
542 0, /* src_mask */
543 0xffffffff, /* dst_mask */
544 false), /* pcrel_offset */
545
546 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
547 FIXME: R_PPC64_PLTREL32 not supported. */
548 HOWTO (R_PPC64_PLTREL32, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 32, /* bitsize */
552 true, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_signed, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_PPC64_PLTREL32", /* name */
557 false, /* partial_inplace */
558 0, /* src_mask */
559 0xffffffff, /* dst_mask */
560 true), /* pcrel_offset */
561
562 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
563 the symbol. */
564 HOWTO (R_PPC64_PLT16_LO, /* type */
565 0, /* rightshift */
566 1, /* size (0 = byte, 1 = short, 2 = long) */
567 16, /* bitsize */
568 false, /* pc_relative */
569 0, /* bitpos */
570 complain_overflow_dont, /* complain_on_overflow */
571 ppc64_elf_unhandled_reloc, /* special_function */
572 "R_PPC64_PLT16_LO", /* name */
573 false, /* partial_inplace */
574 0, /* src_mask */
575 0xffff, /* dst_mask */
576 false), /* pcrel_offset */
577
578 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
579 the symbol. */
580 HOWTO (R_PPC64_PLT16_HI, /* type */
581 16, /* rightshift */
582 1, /* size (0 = byte, 1 = short, 2 = long) */
583 16, /* bitsize */
584 false, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_dont, /* complain_on_overflow */
587 ppc64_elf_unhandled_reloc, /* special_function */
588 "R_PPC64_PLT16_HI", /* name */
589 false, /* partial_inplace */
590 0, /* src_mask */
591 0xffff, /* dst_mask */
592 false), /* pcrel_offset */
593
594 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
595 the symbol. */
596 HOWTO (R_PPC64_PLT16_HA, /* type */
597 16, /* rightshift */
598 1, /* size (0 = byte, 1 = short, 2 = long) */
599 16, /* bitsize */
600 false, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_dont, /* complain_on_overflow */
603 ppc64_elf_unhandled_reloc, /* special_function */
604 "R_PPC64_PLT16_HA", /* name */
605 false, /* partial_inplace */
606 0, /* src_mask */
607 0xffff, /* dst_mask */
608 false), /* pcrel_offset */
609
610 /* 16-bit section relative relocation. */
611 HOWTO (R_PPC64_SECTOFF, /* type */
612 0, /* rightshift */
613 1, /* size (0 = byte, 1 = short, 2 = long) */
614 16, /* bitsize */
615 false, /* pc_relative */
616 0, /* bitpos */
617 complain_overflow_bitfield, /* complain_on_overflow */
618 ppc64_elf_sectoff_reloc, /* special_function */
619 "R_PPC64_SECTOFF", /* name */
620 false, /* partial_inplace */
621 0, /* src_mask */
622 0xffff, /* dst_mask */
623 false), /* pcrel_offset */
624
625 /* Like R_PPC64_SECTOFF, but no overflow warning. */
626 HOWTO (R_PPC64_SECTOFF_LO, /* type */
627 0, /* rightshift */
628 1, /* size (0 = byte, 1 = short, 2 = long) */
629 16, /* bitsize */
630 false, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_dont, /* complain_on_overflow */
633 ppc64_elf_sectoff_reloc, /* special_function */
634 "R_PPC64_SECTOFF_LO", /* name */
635 false, /* partial_inplace */
636 0, /* src_mask */
637 0xffff, /* dst_mask */
638 false), /* pcrel_offset */
639
640 /* 16-bit upper half section relative relocation. */
641 HOWTO (R_PPC64_SECTOFF_HI, /* type */
642 16, /* rightshift */
643 1, /* size (0 = byte, 1 = short, 2 = long) */
644 16, /* bitsize */
645 false, /* pc_relative */
646 0, /* bitpos */
647 complain_overflow_dont, /* complain_on_overflow */
648 ppc64_elf_sectoff_reloc, /* special_function */
649 "R_PPC64_SECTOFF_HI", /* name */
650 false, /* partial_inplace */
651 0, /* src_mask */
652 0xffff, /* dst_mask */
653 false), /* pcrel_offset */
654
655 /* 16-bit upper half adjusted section relative relocation. */
656 HOWTO (R_PPC64_SECTOFF_HA, /* type */
657 16, /* 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 ppc64_elf_sectoff_ha_reloc, /* special_function */
664 "R_PPC64_SECTOFF_HA", /* name */
665 false, /* partial_inplace */
666 0, /* src_mask */
667 0xffff, /* dst_mask */
668 false), /* pcrel_offset */
669
670 /* Like R_PPC64_REL24 without touching the two least significant
671 bits. Should have been named R_PPC64_REL30! */
672 HOWTO (R_PPC64_ADDR30, /* type */
673 2, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 30, /* bitsize */
676 true, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_dont, /* complain_on_overflow */
679 bfd_elf_generic_reloc, /* special_function */
680 "R_PPC64_ADDR30", /* name */
681 false, /* partial_inplace */
682 0, /* src_mask */
683 0xfffffffc, /* dst_mask */
684 true), /* pcrel_offset */
685
686 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
687
688 /* A standard 64-bit relocation. */
689 HOWTO (R_PPC64_ADDR64, /* type */
690 0, /* rightshift */
691 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
692 64, /* bitsize */
693 false, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_dont, /* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_PPC64_ADDR64", /* name */
698 false, /* partial_inplace */
699 0, /* src_mask */
700 ONES (64), /* dst_mask */
701 false), /* pcrel_offset */
702
703 /* The bits 32-47 of an address. */
704 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
705 32, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 false, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_PPC64_ADDR16_HIGHER", /* name */
713 false, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 false), /* pcrel_offset */
717
718 /* The bits 32-47 of an address, plus 1 if the contents of the low
719 16 bits, treated as a signed number, is negative. */
720 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
721 32, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 false, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_dont, /* complain_on_overflow */
727 ppc64_elf_ha_reloc, /* special_function */
728 "R_PPC64_ADDR16_HIGHERA", /* name */
729 false, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 false), /* pcrel_offset */
733
734 /* The bits 48-63 of an address. */
735 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
736 48, /* 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_HIGHEST", /* name */
744 false, /* partial_inplace */
745 0, /* src_mask */
746 0xffff, /* dst_mask */
747 false), /* pcrel_offset */
748
749 /* The bits 48-63 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_HIGHESTA,/* type */
752 48, /* 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_ha_reloc, /* special_function */
759 "R_PPC64_ADDR16_HIGHESTA", /* name */
760 false, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 false), /* pcrel_offset */
764
765 /* Like ADDR64, but may be unaligned. */
766 HOWTO (R_PPC64_UADDR64, /* type */
767 0, /* rightshift */
768 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
769 64, /* 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_UADDR64", /* name */
775 false, /* partial_inplace */
776 0, /* src_mask */
777 ONES (64), /* dst_mask */
778 false), /* pcrel_offset */
779
780 /* 64-bit relative relocation. */
781 HOWTO (R_PPC64_REL64, /* type */
782 0, /* rightshift */
783 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
784 64, /* bitsize */
785 true, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_dont, /* complain_on_overflow */
788 bfd_elf_generic_reloc, /* special_function */
789 "R_PPC64_REL64", /* name */
790 false, /* partial_inplace */
791 0, /* src_mask */
792 ONES (64), /* dst_mask */
793 true), /* pcrel_offset */
794
795 /* 64-bit relocation to the symbol's procedure linkage table. */
796 HOWTO (R_PPC64_PLT64, /* type */
797 0, /* rightshift */
798 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
799 64, /* bitsize */
800 false, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_dont, /* complain_on_overflow */
803 ppc64_elf_unhandled_reloc, /* special_function */
804 "R_PPC64_PLT64", /* name */
805 false, /* partial_inplace */
806 0, /* src_mask */
807 ONES (64), /* dst_mask */
808 false), /* pcrel_offset */
809
810 /* 64-bit PC relative relocation to the symbol's procedure linkage
811 table. */
812 /* FIXME: R_PPC64_PLTREL64 not supported. */
813 HOWTO (R_PPC64_PLTREL64, /* type */
814 0, /* rightshift */
815 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
816 64, /* bitsize */
817 true, /* pc_relative */
818 0, /* bitpos */
819 complain_overflow_dont, /* complain_on_overflow */
820 ppc64_elf_unhandled_reloc, /* special_function */
821 "R_PPC64_PLTREL64", /* name */
822 false, /* partial_inplace */
823 0, /* src_mask */
824 ONES (64), /* dst_mask */
825 true), /* pcrel_offset */
826
827 /* 16 bit TOC-relative relocation. */
828
829 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
830 HOWTO (R_PPC64_TOC16, /* type */
831 0, /* rightshift */
832 1, /* size (0 = byte, 1 = short, 2 = long) */
833 16, /* bitsize */
834 false, /* pc_relative */
835 0, /* bitpos */
836 complain_overflow_signed, /* complain_on_overflow */
837 ppc64_elf_toc_reloc, /* special_function */
838 "R_PPC64_TOC16", /* name */
839 false, /* partial_inplace */
840 0, /* src_mask */
841 0xffff, /* dst_mask */
842 false), /* pcrel_offset */
843
844 /* 16 bit TOC-relative relocation without overflow. */
845
846 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
847 HOWTO (R_PPC64_TOC16_LO, /* type */
848 0, /* rightshift */
849 1, /* size (0 = byte, 1 = short, 2 = long) */
850 16, /* bitsize */
851 false, /* pc_relative */
852 0, /* bitpos */
853 complain_overflow_dont, /* complain_on_overflow */
854 ppc64_elf_toc_reloc, /* special_function */
855 "R_PPC64_TOC16_LO", /* name */
856 false, /* partial_inplace */
857 0, /* src_mask */
858 0xffff, /* dst_mask */
859 false), /* pcrel_offset */
860
861 /* 16 bit TOC-relative relocation, high 16 bits. */
862
863 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
864 HOWTO (R_PPC64_TOC16_HI, /* type */
865 16, /* rightshift */
866 1, /* size (0 = byte, 1 = short, 2 = long) */
867 16, /* bitsize */
868 false, /* pc_relative */
869 0, /* bitpos */
870 complain_overflow_dont, /* complain_on_overflow */
871 ppc64_elf_toc_reloc, /* special_function */
872 "R_PPC64_TOC16_HI", /* name */
873 false, /* partial_inplace */
874 0, /* src_mask */
875 0xffff, /* dst_mask */
876 false), /* pcrel_offset */
877
878 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
879 contents of the low 16 bits, treated as a signed number, is
880 negative. */
881
882 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
883 HOWTO (R_PPC64_TOC16_HA, /* type */
884 16, /* rightshift */
885 1, /* size (0 = byte, 1 = short, 2 = long) */
886 16, /* bitsize */
887 false, /* pc_relative */
888 0, /* bitpos */
889 complain_overflow_dont, /* complain_on_overflow */
890 ppc64_elf_toc_ha_reloc, /* special_function */
891 "R_PPC64_TOC16_HA", /* name */
892 false, /* partial_inplace */
893 0, /* src_mask */
894 0xffff, /* dst_mask */
895 false), /* pcrel_offset */
896
897 /* 64-bit relocation; insert value of TOC base (.TOC.). */
898
899 /* R_PPC64_TOC 51 doubleword64 .TOC. */
900 HOWTO (R_PPC64_TOC, /* type */
901 0, /* rightshift */
902 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
903 64, /* bitsize */
904 false, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_bitfield, /* complain_on_overflow */
907 ppc64_elf_toc64_reloc, /* special_function */
908 "R_PPC64_TOC", /* name */
909 false, /* partial_inplace */
910 0, /* src_mask */
911 ONES (64), /* dst_mask */
912 false), /* pcrel_offset */
913
914 /* Like R_PPC64_GOT16, but also informs the link editor that the
915 value to relocate may (!) refer to a PLT entry which the link
916 editor (a) may replace with the symbol value. If the link editor
917 is unable to fully resolve the symbol, it may (b) create a PLT
918 entry and store the address to the new PLT entry in the GOT.
919 This permits lazy resolution of function symbols at run time.
920 The link editor may also skip all of this and just (c) emit a
921 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
922 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
923 HOWTO (R_PPC64_PLTGOT16, /* type */
924 0, /* rightshift */
925 1, /* size (0 = byte, 1 = short, 2 = long) */
926 16, /* bitsize */
927 false, /* pc_relative */
928 0, /* bitpos */
929 complain_overflow_signed, /* complain_on_overflow */
930 ppc64_elf_unhandled_reloc, /* special_function */
931 "R_PPC64_PLTGOT16", /* name */
932 false, /* partial_inplace */
933 0, /* src_mask */
934 0xffff, /* dst_mask */
935 false), /* pcrel_offset */
936
937 /* Like R_PPC64_PLTGOT16, but without overflow. */
938 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
939 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
940 0, /* rightshift */
941 1, /* size (0 = byte, 1 = short, 2 = long) */
942 16, /* bitsize */
943 false, /* pc_relative */
944 0, /* bitpos */
945 complain_overflow_dont, /* complain_on_overflow */
946 ppc64_elf_unhandled_reloc, /* special_function */
947 "R_PPC64_PLTGOT16_LO", /* name */
948 false, /* partial_inplace */
949 0, /* src_mask */
950 0xffff, /* dst_mask */
951 false), /* pcrel_offset */
952
953 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
954 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
955 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
956 16, /* rightshift */
957 1, /* size (0 = byte, 1 = short, 2 = long) */
958 16, /* bitsize */
959 false, /* pc_relative */
960 0, /* bitpos */
961 complain_overflow_dont, /* complain_on_overflow */
962 ppc64_elf_unhandled_reloc, /* special_function */
963 "R_PPC64_PLTGOT16_HI", /* name */
964 false, /* partial_inplace */
965 0, /* src_mask */
966 0xffff, /* dst_mask */
967 false), /* pcrel_offset */
968
969 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
970 1 if the contents of the low 16 bits, treated as a signed number,
971 is negative. */
972 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
973 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
974 16, /* rightshift */
975 1, /* size (0 = byte, 1 = short, 2 = long) */
976 16, /* bitsize */
977 false, /* pc_relative */
978 0, /* bitpos */
979 complain_overflow_dont,/* complain_on_overflow */
980 ppc64_elf_unhandled_reloc, /* special_function */
981 "R_PPC64_PLTGOT16_HA", /* name */
982 false, /* partial_inplace */
983 0, /* src_mask */
984 0xffff, /* dst_mask */
985 false), /* pcrel_offset */
986
987 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
988 HOWTO (R_PPC64_ADDR16_DS, /* type */
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 false, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_bitfield, /* complain_on_overflow */
995 bfd_elf_generic_reloc, /* special_function */
996 "R_PPC64_ADDR16_DS", /* name */
997 false, /* partial_inplace */
998 0, /* src_mask */
999 0xfffc, /* dst_mask */
1000 false), /* pcrel_offset */
1001
1002 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1003 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 false, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont,/* complain_on_overflow */
1010 bfd_elf_generic_reloc, /* special_function */
1011 "R_PPC64_ADDR16_LO_DS",/* name */
1012 false, /* partial_inplace */
1013 0, /* src_mask */
1014 0xfffc, /* dst_mask */
1015 false), /* pcrel_offset */
1016
1017 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1018 HOWTO (R_PPC64_GOT16_DS, /* type */
1019 0, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 false, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_signed, /* complain_on_overflow */
1025 ppc64_elf_unhandled_reloc, /* special_function */
1026 "R_PPC64_GOT16_DS", /* name */
1027 false, /* partial_inplace */
1028 0, /* src_mask */
1029 0xfffc, /* dst_mask */
1030 false), /* pcrel_offset */
1031
1032 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1033 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1034 0, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 false, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc64_elf_unhandled_reloc, /* special_function */
1041 "R_PPC64_GOT16_LO_DS", /* name */
1042 false, /* partial_inplace */
1043 0, /* src_mask */
1044 0xfffc, /* dst_mask */
1045 false), /* pcrel_offset */
1046
1047 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1048 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1049 0, /* rightshift */
1050 1, /* size (0 = byte, 1 = short, 2 = long) */
1051 16, /* bitsize */
1052 false, /* pc_relative */
1053 0, /* bitpos */
1054 complain_overflow_dont, /* complain_on_overflow */
1055 ppc64_elf_unhandled_reloc, /* special_function */
1056 "R_PPC64_PLT16_LO_DS", /* name */
1057 false, /* partial_inplace */
1058 0, /* src_mask */
1059 0xfffc, /* dst_mask */
1060 false), /* pcrel_offset */
1061
1062 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1063 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1064 0, /* rightshift */
1065 1, /* size (0 = byte, 1 = short, 2 = long) */
1066 16, /* bitsize */
1067 false, /* pc_relative */
1068 0, /* bitpos */
1069 complain_overflow_bitfield, /* complain_on_overflow */
1070 ppc64_elf_sectoff_reloc, /* special_function */
1071 "R_PPC64_SECTOFF_DS", /* name */
1072 false, /* partial_inplace */
1073 0, /* src_mask */
1074 0xfffc, /* dst_mask */
1075 false), /* pcrel_offset */
1076
1077 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1078 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1079 0, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 false, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc64_elf_sectoff_reloc, /* special_function */
1086 "R_PPC64_SECTOFF_LO_DS",/* name */
1087 false, /* partial_inplace */
1088 0, /* src_mask */
1089 0xfffc, /* dst_mask */
1090 false), /* pcrel_offset */
1091
1092 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1093 HOWTO (R_PPC64_TOC16_DS, /* type */
1094 0, /* rightshift */
1095 1, /* size (0 = byte, 1 = short, 2 = long) */
1096 16, /* bitsize */
1097 false, /* pc_relative */
1098 0, /* bitpos */
1099 complain_overflow_signed, /* complain_on_overflow */
1100 ppc64_elf_toc_reloc, /* special_function */
1101 "R_PPC64_TOC16_DS", /* name */
1102 false, /* partial_inplace */
1103 0, /* src_mask */
1104 0xfffc, /* dst_mask */
1105 false), /* pcrel_offset */
1106
1107 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1108 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1109 0, /* rightshift */
1110 1, /* size (0 = byte, 1 = short, 2 = long) */
1111 16, /* bitsize */
1112 false, /* pc_relative */
1113 0, /* bitpos */
1114 complain_overflow_dont, /* complain_on_overflow */
1115 ppc64_elf_toc_reloc, /* special_function */
1116 "R_PPC64_TOC16_LO_DS", /* name */
1117 false, /* partial_inplace */
1118 0, /* src_mask */
1119 0xfffc, /* dst_mask */
1120 false), /* pcrel_offset */
1121
1122 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1123 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1124 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1125 0, /* rightshift */
1126 1, /* size (0 = byte, 1 = short, 2 = long) */
1127 16, /* bitsize */
1128 false, /* pc_relative */
1129 0, /* bitpos */
1130 complain_overflow_signed, /* complain_on_overflow */
1131 ppc64_elf_unhandled_reloc, /* special_function */
1132 "R_PPC64_PLTGOT16_DS", /* name */
1133 false, /* partial_inplace */
1134 0, /* src_mask */
1135 0xfffc, /* dst_mask */
1136 false), /* pcrel_offset */
1137
1138 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1139 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1140 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1141 0, /* rightshift */
1142 1, /* size (0 = byte, 1 = short, 2 = long) */
1143 16, /* bitsize */
1144 false, /* pc_relative */
1145 0, /* bitpos */
1146 complain_overflow_dont, /* complain_on_overflow */
1147 ppc64_elf_unhandled_reloc, /* special_function */
1148 "R_PPC64_PLTGOT16_LO_DS",/* name */
1149 false, /* partial_inplace */
1150 0, /* src_mask */
1151 0xfffc, /* dst_mask */
1152 false), /* pcrel_offset */
1153
1154 /* GNU extension to record C++ vtable hierarchy. */
1155 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1156 0, /* rightshift */
1157 0, /* size (0 = byte, 1 = short, 2 = long) */
1158 0, /* bitsize */
1159 false, /* pc_relative */
1160 0, /* bitpos */
1161 complain_overflow_dont, /* complain_on_overflow */
1162 NULL, /* special_function */
1163 "R_PPC64_GNU_VTINHERIT", /* name */
1164 false, /* partial_inplace */
1165 0, /* src_mask */
1166 0, /* dst_mask */
1167 false), /* pcrel_offset */
1168
1169 /* GNU extension to record C++ vtable member usage. */
1170 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1171 0, /* rightshift */
1172 0, /* size (0 = byte, 1 = short, 2 = long) */
1173 0, /* bitsize */
1174 false, /* pc_relative */
1175 0, /* bitpos */
1176 complain_overflow_dont, /* complain_on_overflow */
1177 NULL, /* special_function */
1178 "R_PPC64_GNU_VTENTRY", /* name */
1179 false, /* partial_inplace */
1180 0, /* src_mask */
1181 0, /* dst_mask */
1182 false), /* pcrel_offset */
1183 };
1184
1185 \f
1186 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1187 be done. */
1188
1189 static void
1190 ppc_howto_init ()
1191 {
1192 unsigned int i, type;
1193
1194 for (i = 0;
1195 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1196 i++)
1197 {
1198 type = ppc64_elf_howto_raw[i].type;
1199 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1200 / sizeof (ppc64_elf_howto_table[0])));
1201 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1202 }
1203 }
1204
1205 static reloc_howto_type *
1206 ppc64_elf_reloc_type_lookup (abfd, code)
1207 bfd *abfd ATTRIBUTE_UNUSED;
1208 bfd_reloc_code_real_type code;
1209 {
1210 enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE;
1211
1212 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1213 /* Initialize howto table if needed. */
1214 ppc_howto_init ();
1215
1216 switch ((int) code)
1217 {
1218 default:
1219 return (reloc_howto_type *) NULL;
1220
1221 case BFD_RELOC_NONE: ppc_reloc = R_PPC64_NONE;
1222 break;
1223 case BFD_RELOC_32: ppc_reloc = R_PPC64_ADDR32;
1224 break;
1225 case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC64_ADDR24;
1226 break;
1227 case BFD_RELOC_16: ppc_reloc = R_PPC64_ADDR16;
1228 break;
1229 case BFD_RELOC_LO16: ppc_reloc = R_PPC64_ADDR16_LO;
1230 break;
1231 case BFD_RELOC_HI16: ppc_reloc = R_PPC64_ADDR16_HI;
1232 break;
1233 case BFD_RELOC_HI16_S: ppc_reloc = R_PPC64_ADDR16_HA;
1234 break;
1235 case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC64_ADDR14;
1236 break;
1237 case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC64_ADDR14_BRTAKEN;
1238 break;
1239 case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC64_ADDR14_BRNTAKEN;
1240 break;
1241 case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC64_REL24;
1242 break;
1243 case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC64_REL14;
1244 break;
1245 case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC64_REL14_BRTAKEN;
1246 break;
1247 case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC64_REL14_BRNTAKEN;
1248 break;
1249 case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC64_GOT16;
1250 break;
1251 case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC64_GOT16_LO;
1252 break;
1253 case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC64_GOT16_HI;
1254 break;
1255 case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC64_GOT16_HA;
1256 break;
1257 case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC64_COPY;
1258 break;
1259 case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC64_GLOB_DAT;
1260 break;
1261 case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC64_REL32;
1262 break;
1263 case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC64_PLT32;
1264 break;
1265 case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL32;
1266 break;
1267 case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC64_PLT16_LO;
1268 break;
1269 case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC64_PLT16_HI;
1270 break;
1271 case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC64_PLT16_HA;
1272 break;
1273 case BFD_RELOC_16_BASEREL: ppc_reloc = R_PPC64_SECTOFF;
1274 break;
1275 case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_LO;
1276 break;
1277 case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HI;
1278 break;
1279 case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HA;
1280 break;
1281 case BFD_RELOC_CTOR: ppc_reloc = R_PPC64_ADDR64;
1282 break;
1283 case BFD_RELOC_64: ppc_reloc = R_PPC64_ADDR64;
1284 break;
1285 case BFD_RELOC_PPC64_HIGHER: ppc_reloc = R_PPC64_ADDR16_HIGHER;
1286 break;
1287 case BFD_RELOC_PPC64_HIGHER_S: ppc_reloc = R_PPC64_ADDR16_HIGHERA;
1288 break;
1289 case BFD_RELOC_PPC64_HIGHEST: ppc_reloc = R_PPC64_ADDR16_HIGHEST;
1290 break;
1291 case BFD_RELOC_PPC64_HIGHEST_S: ppc_reloc = R_PPC64_ADDR16_HIGHESTA;
1292 break;
1293 case BFD_RELOC_64_PCREL: ppc_reloc = R_PPC64_REL64;
1294 break;
1295 case BFD_RELOC_64_PLTOFF: ppc_reloc = R_PPC64_PLT64;
1296 break;
1297 case BFD_RELOC_64_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL64;
1298 break;
1299 case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC64_TOC16;
1300 break;
1301 case BFD_RELOC_PPC64_TOC16_LO: ppc_reloc = R_PPC64_TOC16_LO;
1302 break;
1303 case BFD_RELOC_PPC64_TOC16_HI: ppc_reloc = R_PPC64_TOC16_HI;
1304 break;
1305 case BFD_RELOC_PPC64_TOC16_HA: ppc_reloc = R_PPC64_TOC16_HA;
1306 break;
1307 case BFD_RELOC_PPC64_TOC: ppc_reloc = R_PPC64_TOC;
1308 break;
1309 case BFD_RELOC_PPC64_PLTGOT16: ppc_reloc = R_PPC64_PLTGOT16;
1310 break;
1311 case BFD_RELOC_PPC64_PLTGOT16_LO: ppc_reloc = R_PPC64_PLTGOT16_LO;
1312 break;
1313 case BFD_RELOC_PPC64_PLTGOT16_HI: ppc_reloc = R_PPC64_PLTGOT16_HI;
1314 break;
1315 case BFD_RELOC_PPC64_PLTGOT16_HA: ppc_reloc = R_PPC64_PLTGOT16_HA;
1316 break;
1317 case BFD_RELOC_PPC64_ADDR16_DS: ppc_reloc = R_PPC64_ADDR16_DS;
1318 break;
1319 case BFD_RELOC_PPC64_ADDR16_LO_DS: ppc_reloc = R_PPC64_ADDR16_LO_DS;
1320 break;
1321 case BFD_RELOC_PPC64_GOT16_DS: ppc_reloc = R_PPC64_GOT16_DS;
1322 break;
1323 case BFD_RELOC_PPC64_GOT16_LO_DS: ppc_reloc = R_PPC64_GOT16_LO_DS;
1324 break;
1325 case BFD_RELOC_PPC64_PLT16_LO_DS: ppc_reloc = R_PPC64_PLT16_LO_DS;
1326 break;
1327 case BFD_RELOC_PPC64_SECTOFF_DS: ppc_reloc = R_PPC64_SECTOFF_DS;
1328 break;
1329 case BFD_RELOC_PPC64_SECTOFF_LO_DS: ppc_reloc = R_PPC64_SECTOFF_LO_DS;
1330 break;
1331 case BFD_RELOC_PPC64_TOC16_DS: ppc_reloc = R_PPC64_TOC16_DS;
1332 break;
1333 case BFD_RELOC_PPC64_TOC16_LO_DS: ppc_reloc = R_PPC64_TOC16_LO_DS;
1334 break;
1335 case BFD_RELOC_PPC64_PLTGOT16_DS: ppc_reloc = R_PPC64_PLTGOT16_DS;
1336 break;
1337 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: ppc_reloc = R_PPC64_PLTGOT16_LO_DS;
1338 break;
1339 case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC64_GNU_VTINHERIT;
1340 break;
1341 case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC64_GNU_VTENTRY;
1342 break;
1343 }
1344
1345 return ppc64_elf_howto_table[(int) ppc_reloc];
1346 };
1347
1348 /* Set the howto pointer for a PowerPC ELF reloc. */
1349
1350 static void
1351 ppc64_elf_info_to_howto (abfd, cache_ptr, dst)
1352 bfd *abfd ATTRIBUTE_UNUSED;
1353 arelent *cache_ptr;
1354 Elf64_Internal_Rela *dst;
1355 {
1356 unsigned int type;
1357
1358 /* Initialize howto table if needed. */
1359 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1360 ppc_howto_init ();
1361
1362 type = ELF64_R_TYPE (dst->r_info);
1363 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1364 / sizeof (ppc64_elf_howto_table[0])));
1365 cache_ptr->howto = ppc64_elf_howto_table[type];
1366 }
1367
1368 /* Handle the R_PPC_ADDR16_HA and similar relocs. */
1369
1370 static bfd_reloc_status_type
1371 ppc64_elf_ha_reloc (abfd, reloc_entry, symbol, data,
1372 input_section, output_bfd, error_message)
1373 bfd *abfd;
1374 arelent *reloc_entry;
1375 asymbol *symbol;
1376 PTR data;
1377 asection *input_section;
1378 bfd *output_bfd;
1379 char **error_message;
1380 {
1381 /* If this is a relocatable link (output_bfd test tells us), just
1382 call the generic function. Any adjustment will be done at final
1383 link time. */
1384 if (output_bfd != NULL)
1385 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1386 input_section, output_bfd, error_message);
1387
1388 /* Adjust the addend for sign extension of the low 16 bits.
1389 We won't actually be using the low 16 bits, so trashing them
1390 doesn't matter. */
1391 reloc_entry->addend += 0x8000;
1392 return bfd_reloc_continue;
1393 }
1394
1395 static bfd_reloc_status_type
1396 ppc64_elf_brtaken_reloc (abfd, reloc_entry, symbol, data,
1397 input_section, output_bfd, error_message)
1398 bfd *abfd;
1399 arelent *reloc_entry;
1400 asymbol *symbol;
1401 PTR data;
1402 asection *input_section;
1403 bfd *output_bfd;
1404 char **error_message;
1405 {
1406 long insn;
1407 enum elf_ppc_reloc_type r_type;
1408 bfd_size_type octets;
1409 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
1410 boolean is_power4 = false;
1411
1412 /* If this is a relocatable link (output_bfd test tells us), just
1413 call the generic function. Any adjustment will be done at final
1414 link time. */
1415 if (output_bfd != NULL)
1416 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1417 input_section, output_bfd, error_message);
1418
1419 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
1420 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
1421 insn &= ~(0x01 << 21);
1422 r_type = (enum elf_ppc_reloc_type) reloc_entry->howto->type;
1423 if (r_type == R_PPC64_ADDR14_BRTAKEN
1424 || r_type == R_PPC64_REL14_BRTAKEN)
1425 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
1426
1427 if (is_power4)
1428 {
1429 /* Set 'a' bit. This is 0b00010 in BO field for branch
1430 on CR(BI) insns (BO == 001at or 011at), and 0b01000
1431 for branch on CTR insns (BO == 1a00t or 1a01t). */
1432 if ((insn & (0x14 << 21)) == (0x04 << 21))
1433 insn |= 0x02 << 21;
1434 else if ((insn & (0x14 << 21)) == (0x10 << 21))
1435 insn |= 0x08 << 21;
1436 else
1437 return bfd_reloc_continue;
1438 }
1439 else
1440 {
1441 bfd_vma target = 0;
1442 bfd_vma from;
1443
1444 if (!bfd_is_com_section (symbol->section))
1445 target = symbol->value;
1446 target += symbol->section->output_section->vma;
1447 target += symbol->section->output_offset;
1448 target += reloc_entry->addend;
1449
1450 from = (reloc_entry->address
1451 + input_section->output_offset
1452 + input_section->output_section->vma);
1453
1454 /* Invert 'y' bit if not the default. */
1455 if ((bfd_signed_vma) (target - from) < 0)
1456 insn ^= 0x01 << 21;
1457 }
1458 bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + octets);
1459 return bfd_reloc_continue;
1460 }
1461
1462 static bfd_reloc_status_type
1463 ppc64_elf_sectoff_reloc (abfd, reloc_entry, symbol, data,
1464 input_section, output_bfd, error_message)
1465 bfd *abfd;
1466 arelent *reloc_entry;
1467 asymbol *symbol;
1468 PTR data;
1469 asection *input_section;
1470 bfd *output_bfd;
1471 char **error_message;
1472 {
1473 /* If this is a relocatable link (output_bfd test tells us), just
1474 call the generic function. Any adjustment will be done at final
1475 link time. */
1476 if (output_bfd != NULL)
1477 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1478 input_section, output_bfd, error_message);
1479
1480 /* Subtract the symbol section base address. */
1481 reloc_entry->addend -= symbol->section->output_section->vma;
1482 return bfd_reloc_continue;
1483 }
1484
1485 static bfd_reloc_status_type
1486 ppc64_elf_sectoff_ha_reloc (abfd, reloc_entry, symbol, data,
1487 input_section, output_bfd, error_message)
1488 bfd *abfd;
1489 arelent *reloc_entry;
1490 asymbol *symbol;
1491 PTR data;
1492 asection *input_section;
1493 bfd *output_bfd;
1494 char **error_message;
1495 {
1496 /* If this is a relocatable link (output_bfd test tells us), just
1497 call the generic function. Any adjustment will be done at final
1498 link time. */
1499 if (output_bfd != NULL)
1500 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1501 input_section, output_bfd, error_message);
1502
1503 /* Subtract the symbol section base address. */
1504 reloc_entry->addend -= symbol->section->output_section->vma;
1505
1506 /* Adjust the addend for sign extension of the low 16 bits. */
1507 reloc_entry->addend += 0x8000;
1508 return bfd_reloc_continue;
1509 }
1510
1511 static bfd_reloc_status_type
1512 ppc64_elf_toc_reloc (abfd, reloc_entry, symbol, data,
1513 input_section, output_bfd, error_message)
1514 bfd *abfd;
1515 arelent *reloc_entry;
1516 asymbol *symbol;
1517 PTR data;
1518 asection *input_section;
1519 bfd *output_bfd;
1520 char **error_message;
1521 {
1522 bfd_vma TOCstart;
1523
1524 /* If this is a relocatable link (output_bfd test tells us), just
1525 call the generic function. Any adjustment will be done at final
1526 link time. */
1527 if (output_bfd != NULL)
1528 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1529 input_section, output_bfd, error_message);
1530
1531 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
1532 if (TOCstart == 0)
1533 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
1534
1535 /* Subtract the TOC base address. */
1536 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
1537 return bfd_reloc_continue;
1538 }
1539
1540 static bfd_reloc_status_type
1541 ppc64_elf_toc_ha_reloc (abfd, reloc_entry, symbol, data,
1542 input_section, output_bfd, error_message)
1543 bfd *abfd;
1544 arelent *reloc_entry;
1545 asymbol *symbol;
1546 PTR data;
1547 asection *input_section;
1548 bfd *output_bfd;
1549 char **error_message;
1550 {
1551 bfd_vma TOCstart;
1552
1553 /* If this is a relocatable link (output_bfd test tells us), just
1554 call the generic function. Any adjustment will be done at final
1555 link time. */
1556 if (output_bfd != NULL)
1557 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1558 input_section, output_bfd, error_message);
1559
1560 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
1561 if (TOCstart == 0)
1562 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
1563
1564 /* Subtract the TOC base address. */
1565 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
1566
1567 /* Adjust the addend for sign extension of the low 16 bits. */
1568 reloc_entry->addend += 0x8000;
1569 return bfd_reloc_continue;
1570 }
1571
1572 static bfd_reloc_status_type
1573 ppc64_elf_toc64_reloc (abfd, reloc_entry, symbol, data,
1574 input_section, output_bfd, error_message)
1575 bfd *abfd;
1576 arelent *reloc_entry;
1577 asymbol *symbol;
1578 PTR data;
1579 asection *input_section;
1580 bfd *output_bfd;
1581 char **error_message;
1582 {
1583 bfd_vma TOCstart;
1584 bfd_size_type octets;
1585
1586 /* If this is a relocatable link (output_bfd test tells us), just
1587 call the generic function. Any adjustment will be done at final
1588 link time. */
1589 if (output_bfd != NULL)
1590 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1591 input_section, output_bfd, error_message);
1592
1593 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
1594 if (TOCstart == 0)
1595 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
1596
1597 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
1598 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
1599 return bfd_reloc_ok;
1600 }
1601
1602 static bfd_reloc_status_type
1603 ppc64_elf_unhandled_reloc (abfd, reloc_entry, symbol, data,
1604 input_section, output_bfd, error_message)
1605 bfd *abfd;
1606 arelent *reloc_entry;
1607 asymbol *symbol;
1608 PTR data;
1609 asection *input_section;
1610 bfd *output_bfd;
1611 char **error_message;
1612 {
1613 /* If this is a relocatable link (output_bfd test tells us), just
1614 call the generic function. Any adjustment will be done at final
1615 link time. */
1616 if (output_bfd != NULL)
1617 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1618 input_section, output_bfd, error_message);
1619
1620 if (error_message != NULL)
1621 {
1622 static char buf[60];
1623 sprintf (buf, "generic linker can't handle %s",
1624 reloc_entry->howto->name);
1625 *error_message = buf;
1626 }
1627 return bfd_reloc_dangerous;
1628 }
1629
1630 /* Fix bad default arch selected for a 64 bit input bfd when the
1631 default is 32 bit. */
1632
1633 static boolean
1634 ppc64_elf_object_p (abfd)
1635 bfd *abfd;
1636 {
1637 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
1638 {
1639 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1640
1641 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
1642 {
1643 /* Relies on arch after 32 bit default being 64 bit default. */
1644 abfd->arch_info = abfd->arch_info->next;
1645 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
1646 }
1647 }
1648 return true;
1649 }
1650
1651 /* Merge backend specific data from an object file to the output
1652 object file when linking. */
1653
1654 static boolean
1655 ppc64_elf_merge_private_bfd_data (ibfd, obfd)
1656 bfd *ibfd;
1657 bfd *obfd;
1658 {
1659 /* Check if we have the same endianess. */
1660 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
1661 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
1662 {
1663 const char *msg;
1664
1665 if (bfd_big_endian (ibfd))
1666 msg = _("%s: compiled for a big endian system and target is little endian");
1667 else
1668 msg = _("%s: compiled for a little endian system and target is big endian");
1669
1670 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
1671
1672 bfd_set_error (bfd_error_wrong_format);
1673 return false;
1674 }
1675
1676 return true;
1677 }
1678 \f
1679 /* The following functions are specific to the ELF linker, while
1680 functions above are used generally. Those named ppc64_elf_* are
1681 called by the main ELF linker code. They appear in this file more
1682 or less in the order in which they are called. eg.
1683 ppc64_elf_check_relocs is called early in the link process,
1684 ppc64_elf_finish_dynamic_sections is one of the last functions
1685 called.
1686
1687 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
1688 functions have both a function code symbol and a function descriptor
1689 symbol. A call to foo in a relocatable object file looks like:
1690
1691 . .text
1692 . x:
1693 . bl .foo
1694 . nop
1695
1696 The function definition in another object file might be:
1697
1698 . .section .opd
1699 . foo: .quad .foo
1700 . .quad .TOC.@tocbase
1701 . .quad 0
1702 .
1703 . .text
1704 . .foo: blr
1705
1706 When the linker resolves the call during a static link, the branch
1707 unsurprisingly just goes to .foo and the .opd information is unused.
1708 If the function definition is in a shared library, things are a little
1709 different: The call goes via a plt call stub, the opd information gets
1710 copied to the plt, and the linker patches the nop.
1711
1712 . x:
1713 . bl .foo_stub
1714 . ld 2,40(1)
1715 .
1716 .
1717 . .foo_stub:
1718 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
1719 . addi 12,12,Lfoo@toc@l # is slightly optimised, but
1720 . std 2,40(1) # this is the general idea
1721 . ld 11,0(12)
1722 . ld 2,8(12)
1723 . mtctr 11
1724 . ld 11,16(12)
1725 . bctr
1726 .
1727 . .section .plt
1728 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
1729
1730 The "reloc ()" notation is supposed to indicate that the linker emits
1731 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
1732 copying.
1733
1734 What are the difficulties here? Well, firstly, the relocations
1735 examined by the linker in check_relocs are against the function code
1736 sym .foo, while the dynamic relocation in the plt is emitted against
1737 the function descriptor symbol, foo. Somewhere along the line, we need
1738 to carefully copy dynamic link information from one symbol to the other.
1739 Secondly, the generic part of the elf linker will make .foo a dynamic
1740 symbol as is normal for most other backends. We need foo dynamic
1741 instead, at least for an application final link. However, when
1742 creating a shared library containing foo, we need to have both symbols
1743 dynamic so that references to .foo are satisfied during the early
1744 stages of linking. Otherwise the linker might decide to pull in a
1745 definition from some other object, eg. a static library. */
1746
1747 /* The linker needs to keep track of the number of relocs that it
1748 decides to copy as dynamic relocs in check_relocs for each symbol.
1749 This is so that it can later discard them if they are found to be
1750 unnecessary. We store the information in a field extending the
1751 regular ELF linker hash table. */
1752
1753 struct ppc_dyn_relocs
1754 {
1755 struct ppc_dyn_relocs *next;
1756
1757 /* The input section of the reloc. */
1758 asection *sec;
1759
1760 /* Total number of relocs copied for the input section. */
1761 bfd_size_type count;
1762
1763 /* Number of pc-relative relocs copied for the input section. */
1764 bfd_size_type pc_count;
1765 };
1766
1767 /* Of those relocs that might be copied as dynamic relocs, this macro
1768 selects between relative and absolute types. */
1769
1770 #define IS_ABSOLUTE_RELOC(RTYPE) \
1771 ((RTYPE) != R_PPC64_REL32 \
1772 && (RTYPE) != R_PPC64_REL64 \
1773 && (RTYPE) != R_PPC64_ADDR30)
1774
1775 /* Section name for stubs is the associated section name plus this
1776 string. */
1777 #define STUB_SUFFIX ".stub"
1778
1779 /* Linker stubs.
1780 ppc_stub_long_branch:
1781 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
1782 destination, but a 24 bit branch in a stub section will reach.
1783 . b dest
1784
1785 ppc_stub_plt_branch:
1786 Similar to the above, but a 24 bit branch in the stub section won't
1787 reach its destination.
1788 . addis %r12,%r2,xxx@ha
1789 . ld %r11,xxx@l(%r12)
1790 . mtctr %r11
1791 . bctr
1792
1793 ppc_stub_plt_call:
1794 Used to call a function in a shared library.
1795 . addis %r12,%r2,xxx@ha
1796 . std %r2,40(%r1)
1797 . ld %r11,xxx+0@l(%r12)
1798 . ld %r2,xxx+8@l(%r12)
1799 . mtctr %r11
1800 . ld %r11,xxx+16@l(%r12)
1801 . bctr
1802 */
1803
1804 enum ppc_stub_type {
1805 ppc_stub_none,
1806 ppc_stub_long_branch,
1807 ppc_stub_plt_branch,
1808 ppc_stub_plt_call
1809 };
1810
1811 struct ppc_stub_hash_entry {
1812
1813 /* Base hash table entry structure. */
1814 struct bfd_hash_entry root;
1815
1816 /* The stub section. */
1817 asection *stub_sec;
1818
1819 /* Offset within stub_sec of the beginning of this stub. */
1820 bfd_vma stub_offset;
1821
1822 /* Given the symbol's value and its section we can determine its final
1823 value when building the stubs (so the stub knows where to jump. */
1824 bfd_vma target_value;
1825 asection *target_section;
1826
1827 enum ppc_stub_type stub_type;
1828
1829 /* The symbol table entry, if any, that this was derived from. */
1830 struct ppc_link_hash_entry *h;
1831
1832 /* Where this stub is being called from, or, in the case of combined
1833 stub sections, the first input section in the group. */
1834 asection *id_sec;
1835 };
1836
1837 struct ppc_branch_hash_entry {
1838
1839 /* Base hash table entry structure. */
1840 struct bfd_hash_entry root;
1841
1842 /* Offset within .branch_lt. */
1843 unsigned int offset;
1844
1845 /* Generation marker. */
1846 unsigned int iter;
1847 };
1848
1849 struct ppc_link_hash_entry
1850 {
1851 struct elf_link_hash_entry elf;
1852
1853 /* A pointer to the most recently used stub hash entry against this
1854 symbol. */
1855 struct ppc_stub_hash_entry *stub_cache;
1856
1857 /* Track dynamic relocs copied for this symbol. */
1858 struct ppc_dyn_relocs *dyn_relocs;
1859
1860 /* Link between function code and descriptor symbols. */
1861 struct elf_link_hash_entry *oh;
1862
1863 /* Flag function code and descriptor symbols. */
1864 unsigned int is_func:1;
1865 unsigned int is_func_descriptor:1;
1866 unsigned int is_entry:1;
1867 };
1868
1869 /* ppc64 ELF linker hash table. */
1870
1871 struct ppc_link_hash_table
1872 {
1873 struct elf_link_hash_table elf;
1874
1875 /* The stub hash table. */
1876 struct bfd_hash_table stub_hash_table;
1877
1878 /* Another hash table for plt_branch stubs. */
1879 struct bfd_hash_table branch_hash_table;
1880
1881 /* Linker stub bfd. */
1882 bfd *stub_bfd;
1883
1884 /* Linker call-backs. */
1885 asection * (*add_stub_section) PARAMS ((const char *, asection *));
1886 void (*layout_sections_again) PARAMS ((void));
1887
1888 /* Array to keep track of which stub sections have been created, and
1889 information on stub grouping. */
1890 struct map_stub {
1891 /* This is the section to which stubs in the group will be attached. */
1892 asection *link_sec;
1893 /* The stub section. */
1894 asection *stub_sec;
1895 } *stub_group;
1896
1897 /* Assorted information used by ppc64_elf_size_stubs. */
1898 int top_index;
1899 asection **input_list;
1900
1901 /* Short-cuts to get to dynamic linker sections. */
1902 asection *sgot;
1903 asection *srelgot;
1904 asection *splt;
1905 asection *srelplt;
1906 asection *sdynbss;
1907 asection *srelbss;
1908 asection *sglink;
1909 asection *sfpr;
1910 asection *sbrlt;
1911 asection *srelbrlt;
1912
1913 /* Set on error. */
1914 unsigned int stub_error;
1915
1916 /* Flag set when small branches are detected. Used to
1917 select suitable defaults for the stub group size. */
1918 unsigned int has_14bit_branch;
1919
1920 /* Set if we detect a reference undefined weak symbol. */
1921 unsigned int have_undefweak;
1922
1923 /* Incremented every time we size stubs. */
1924 unsigned int stub_iteration;
1925
1926 /* Small local sym to section mapping cache. */
1927 struct sym_sec_cache sym_sec;
1928 };
1929
1930 static struct bfd_hash_entry *stub_hash_newfunc
1931 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
1932 static struct bfd_hash_entry *branch_hash_newfunc
1933 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
1934 static struct bfd_hash_entry *link_hash_newfunc
1935 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
1936 static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create
1937 PARAMS ((bfd *));
1938 static void ppc64_elf_link_hash_table_free
1939 PARAMS ((struct bfd_link_hash_table *));
1940 static char *ppc_stub_name
1941 PARAMS ((const asection *, const asection *,
1942 const struct ppc_link_hash_entry *, const Elf_Internal_Rela *));
1943 static struct ppc_stub_hash_entry *ppc_get_stub_entry
1944 PARAMS ((const asection *, const asection *, struct elf_link_hash_entry *,
1945 const Elf_Internal_Rela *, struct ppc_link_hash_table *));
1946 static struct ppc_stub_hash_entry *ppc_add_stub
1947 PARAMS ((const char *, asection *, struct ppc_link_hash_table *));
1948 static boolean create_linkage_sections
1949 PARAMS ((bfd *, struct bfd_link_info *));
1950 static boolean create_got_section
1951 PARAMS ((bfd *, struct bfd_link_info *));
1952 static boolean ppc64_elf_create_dynamic_sections
1953 PARAMS ((bfd *, struct bfd_link_info *));
1954 static void ppc64_elf_copy_indirect_symbol
1955 PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
1956 struct elf_link_hash_entry *));
1957 static boolean ppc64_elf_check_relocs
1958 PARAMS ((bfd *, struct bfd_link_info *, asection *,
1959 const Elf_Internal_Rela *));
1960 static asection * ppc64_elf_gc_mark_hook
1961 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
1962 struct elf_link_hash_entry *, Elf_Internal_Sym *));
1963 static boolean ppc64_elf_gc_sweep_hook
1964 PARAMS ((bfd *, struct bfd_link_info *, asection *,
1965 const Elf_Internal_Rela *));
1966 static boolean func_desc_adjust
1967 PARAMS ((struct elf_link_hash_entry *, PTR));
1968 static boolean ppc64_elf_func_desc_adjust
1969 PARAMS ((bfd *, struct bfd_link_info *));
1970 static boolean ppc64_elf_adjust_dynamic_symbol
1971 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
1972 static void ppc64_elf_hide_symbol
1973 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean));
1974 static boolean edit_opd
1975 PARAMS ((bfd *, struct bfd_link_info *));
1976 static boolean allocate_dynrelocs
1977 PARAMS ((struct elf_link_hash_entry *, PTR));
1978 static boolean readonly_dynrelocs
1979 PARAMS ((struct elf_link_hash_entry *, PTR));
1980 static enum elf_reloc_type_class ppc64_elf_reloc_type_class
1981 PARAMS ((const Elf_Internal_Rela *));
1982 static boolean ppc64_elf_size_dynamic_sections
1983 PARAMS ((bfd *, struct bfd_link_info *));
1984 static INLINE enum ppc_stub_type ppc_type_of_stub
1985 PARAMS ((asection *, const Elf_Internal_Rela *,
1986 struct ppc_link_hash_entry **, bfd_vma));
1987 static bfd_byte *build_plt_stub
1988 PARAMS ((bfd *, bfd_byte *, int, int));
1989 static boolean ppc_build_one_stub
1990 PARAMS ((struct bfd_hash_entry *, PTR));
1991 static boolean ppc_size_one_stub
1992 PARAMS ((struct bfd_hash_entry *, PTR));
1993 static void group_sections
1994 PARAMS ((struct ppc_link_hash_table *, bfd_size_type, boolean));
1995 static boolean ppc64_elf_relocate_section
1996 PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *,
1997 Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
1998 asection **));
1999 static boolean ppc64_elf_finish_dynamic_symbol
2000 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
2001 Elf_Internal_Sym *));
2002 static boolean ppc64_elf_finish_dynamic_sections
2003 PARAMS ((bfd *, struct bfd_link_info *));
2004
2005 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2006
2007 #define ppc_hash_table(p) \
2008 ((struct ppc_link_hash_table *) ((p)->hash))
2009
2010 #define ppc_stub_hash_lookup(table, string, create, copy) \
2011 ((struct ppc_stub_hash_entry *) \
2012 bfd_hash_lookup ((table), (string), (create), (copy)))
2013
2014 #define ppc_branch_hash_lookup(table, string, create, copy) \
2015 ((struct ppc_branch_hash_entry *) \
2016 bfd_hash_lookup ((table), (string), (create), (copy)))
2017
2018 /* Create an entry in the stub hash table. */
2019
2020 static struct bfd_hash_entry *
2021 stub_hash_newfunc (entry, table, string)
2022 struct bfd_hash_entry *entry;
2023 struct bfd_hash_table *table;
2024 const char *string;
2025 {
2026 /* Allocate the structure if it has not already been allocated by a
2027 subclass. */
2028 if (entry == NULL)
2029 {
2030 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2031 if (entry == NULL)
2032 return entry;
2033 }
2034
2035 /* Call the allocation method of the superclass. */
2036 entry = bfd_hash_newfunc (entry, table, string);
2037 if (entry != NULL)
2038 {
2039 struct ppc_stub_hash_entry *eh;
2040
2041 /* Initialize the local fields. */
2042 eh = (struct ppc_stub_hash_entry *) entry;
2043 eh->stub_sec = NULL;
2044 eh->stub_offset = 0;
2045 eh->target_value = 0;
2046 eh->target_section = NULL;
2047 eh->stub_type = ppc_stub_none;
2048 eh->h = NULL;
2049 eh->id_sec = NULL;
2050 }
2051
2052 return entry;
2053 }
2054
2055 /* Create an entry in the branch hash table. */
2056
2057 static struct bfd_hash_entry *
2058 branch_hash_newfunc (entry, table, string)
2059 struct bfd_hash_entry *entry;
2060 struct bfd_hash_table *table;
2061 const char *string;
2062 {
2063 /* Allocate the structure if it has not already been allocated by a
2064 subclass. */
2065 if (entry == NULL)
2066 {
2067 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2068 if (entry == NULL)
2069 return entry;
2070 }
2071
2072 /* Call the allocation method of the superclass. */
2073 entry = bfd_hash_newfunc (entry, table, string);
2074 if (entry != NULL)
2075 {
2076 struct ppc_branch_hash_entry *eh;
2077
2078 /* Initialize the local fields. */
2079 eh = (struct ppc_branch_hash_entry *) entry;
2080 eh->offset = 0;
2081 eh->iter = 0;
2082 }
2083
2084 return entry;
2085 }
2086
2087 /* Create an entry in a ppc64 ELF linker hash table. */
2088
2089 static struct bfd_hash_entry *
2090 link_hash_newfunc (entry, table, string)
2091 struct bfd_hash_entry *entry;
2092 struct bfd_hash_table *table;
2093 const char *string;
2094 {
2095 /* Allocate the structure if it has not already been allocated by a
2096 subclass. */
2097 if (entry == NULL)
2098 {
2099 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
2100 if (entry == NULL)
2101 return entry;
2102 }
2103
2104 /* Call the allocation method of the superclass. */
2105 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2106 if (entry != NULL)
2107 {
2108 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
2109
2110 eh->stub_cache = NULL;
2111 eh->dyn_relocs = NULL;
2112 eh->oh = NULL;
2113 eh->is_func = 0;
2114 eh->is_func_descriptor = 0;
2115 eh->is_entry = 0;
2116 }
2117
2118 return entry;
2119 }
2120
2121 /* Create a ppc64 ELF linker hash table. */
2122
2123 static struct bfd_link_hash_table *
2124 ppc64_elf_link_hash_table_create (abfd)
2125 bfd *abfd;
2126 {
2127 struct ppc_link_hash_table *htab;
2128 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
2129
2130 htab = (struct ppc_link_hash_table *) bfd_malloc (amt);
2131 if (htab == NULL)
2132 return NULL;
2133
2134 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
2135 {
2136 free (htab);
2137 return NULL;
2138 }
2139
2140 /* Init the stub hash table too. */
2141 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
2142 return NULL;
2143
2144 /* And the branch hash table. */
2145 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
2146 return NULL;
2147
2148 htab->stub_bfd = NULL;
2149 htab->add_stub_section = NULL;
2150 htab->layout_sections_again = NULL;
2151 htab->stub_group = NULL;
2152 htab->sgot = NULL;
2153 htab->srelgot = NULL;
2154 htab->splt = NULL;
2155 htab->srelplt = NULL;
2156 htab->sdynbss = NULL;
2157 htab->srelbss = NULL;
2158 htab->sglink = NULL;
2159 htab->sfpr = NULL;
2160 htab->sbrlt = NULL;
2161 htab->srelbrlt = NULL;
2162 htab->stub_error = 0;
2163 htab->has_14bit_branch = 0;
2164 htab->have_undefweak = 0;
2165 htab->stub_iteration = 0;
2166 htab->sym_sec.abfd = NULL;
2167
2168 return &htab->elf.root;
2169 }
2170
2171 /* Free the derived linker hash table. */
2172
2173 static void
2174 ppc64_elf_link_hash_table_free (hash)
2175 struct bfd_link_hash_table *hash;
2176 {
2177 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
2178
2179 bfd_hash_table_free (&ret->stub_hash_table);
2180 bfd_hash_table_free (&ret->branch_hash_table);
2181 _bfd_generic_link_hash_table_free (hash);
2182 }
2183
2184 /* Build a name for an entry in the stub hash table. */
2185
2186 static char *
2187 ppc_stub_name (input_section, sym_sec, h, rel)
2188 const asection *input_section;
2189 const asection *sym_sec;
2190 const struct ppc_link_hash_entry *h;
2191 const Elf_Internal_Rela *rel;
2192 {
2193 char *stub_name;
2194 bfd_size_type len;
2195
2196 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
2197 offsets from a sym as a branch target? In fact, we could
2198 probably assume the addend is always zero. */
2199 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
2200
2201 if (h)
2202 {
2203 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
2204 stub_name = bfd_malloc (len);
2205 if (stub_name != NULL)
2206 {
2207 sprintf (stub_name, "%08x_%s+%x",
2208 input_section->id & 0xffffffff,
2209 h->elf.root.root.string,
2210 (int) rel->r_addend & 0xffffffff);
2211 }
2212 }
2213 else
2214 {
2215 len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2216 stub_name = bfd_malloc (len);
2217 if (stub_name != NULL)
2218 {
2219 sprintf (stub_name, "%08x_%x:%x+%x",
2220 input_section->id & 0xffffffff,
2221 sym_sec->id & 0xffffffff,
2222 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
2223 (int) rel->r_addend & 0xffffffff);
2224 }
2225 }
2226 return stub_name;
2227 }
2228
2229 /* Look up an entry in the stub hash. Stub entries are cached because
2230 creating the stub name takes a bit of time. */
2231
2232 static struct ppc_stub_hash_entry *
2233 ppc_get_stub_entry (input_section, sym_sec, hash, rel, htab)
2234 const asection *input_section;
2235 const asection *sym_sec;
2236 struct elf_link_hash_entry *hash;
2237 const Elf_Internal_Rela *rel;
2238 struct ppc_link_hash_table *htab;
2239 {
2240 struct ppc_stub_hash_entry *stub_entry;
2241 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
2242 const asection *id_sec;
2243
2244 /* If this input section is part of a group of sections sharing one
2245 stub section, then use the id of the first section in the group.
2246 Stub names need to include a section id, as there may well be
2247 more than one stub used to reach say, printf, and we need to
2248 distinguish between them. */
2249 id_sec = htab->stub_group[input_section->id].link_sec;
2250
2251 if (h != NULL && h->stub_cache != NULL
2252 && h->stub_cache->h == h
2253 && h->stub_cache->id_sec == id_sec)
2254 {
2255 stub_entry = h->stub_cache;
2256 }
2257 else
2258 {
2259 char *stub_name;
2260
2261 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
2262 if (stub_name == NULL)
2263 return NULL;
2264
2265 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
2266 stub_name, false, false);
2267 if (h != NULL)
2268 h->stub_cache = stub_entry;
2269
2270 free (stub_name);
2271 }
2272
2273 return stub_entry;
2274 }
2275
2276 /* Add a new stub entry to the stub hash. Not all fields of the new
2277 stub entry are initialised. */
2278
2279 static struct ppc_stub_hash_entry *
2280 ppc_add_stub (stub_name, section, htab)
2281 const char *stub_name;
2282 asection *section;
2283 struct ppc_link_hash_table *htab;
2284 {
2285 asection *link_sec;
2286 asection *stub_sec;
2287 struct ppc_stub_hash_entry *stub_entry;
2288
2289 link_sec = htab->stub_group[section->id].link_sec;
2290 stub_sec = htab->stub_group[section->id].stub_sec;
2291 if (stub_sec == NULL)
2292 {
2293 stub_sec = htab->stub_group[link_sec->id].stub_sec;
2294 if (stub_sec == NULL)
2295 {
2296 size_t namelen;
2297 bfd_size_type len;
2298 char *s_name;
2299
2300 namelen = strlen (link_sec->name);
2301 len = namelen + sizeof (STUB_SUFFIX);
2302 s_name = bfd_alloc (htab->stub_bfd, len);
2303 if (s_name == NULL)
2304 return NULL;
2305
2306 memcpy (s_name, link_sec->name, namelen);
2307 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2308 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
2309 if (stub_sec == NULL)
2310 return NULL;
2311 htab->stub_group[link_sec->id].stub_sec = stub_sec;
2312 }
2313 htab->stub_group[section->id].stub_sec = stub_sec;
2314 }
2315
2316 /* Enter this entry into the linker stub hash table. */
2317 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2318 true, false);
2319 if (stub_entry == NULL)
2320 {
2321 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
2322 bfd_archive_filename (section->owner),
2323 stub_name);
2324 return NULL;
2325 }
2326
2327 stub_entry->stub_sec = stub_sec;
2328 stub_entry->stub_offset = 0;
2329 stub_entry->id_sec = link_sec;
2330 return stub_entry;
2331 }
2332
2333 /* Create sections for linker generated code. */
2334
2335 static boolean
2336 create_linkage_sections (dynobj, info)
2337 bfd *dynobj;
2338 struct bfd_link_info *info;
2339 {
2340 struct ppc_link_hash_table *htab;
2341 flagword flags;
2342
2343 htab = ppc_hash_table (info);
2344
2345 /* Create .sfpr for code to save and restore fp regs. */
2346 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
2347 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2348 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
2349 if (htab->sfpr == NULL
2350 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
2351 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
2352 return false;
2353
2354 /* Create .glink for lazy dynamic linking support. */
2355 htab->sglink = bfd_make_section_anyway (dynobj, ".glink");
2356 if (htab->sglink == NULL
2357 || ! bfd_set_section_flags (dynobj, htab->sglink, flags)
2358 || ! bfd_set_section_alignment (dynobj, htab->sglink, 2))
2359 return false;
2360
2361 /* Create .branch_lt for plt_branch stubs. */
2362 flags = (SEC_ALLOC | SEC_LOAD
2363 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2364 htab->sbrlt = bfd_make_section_anyway (dynobj, ".branch_lt");
2365 if (htab->sbrlt == NULL
2366 || ! bfd_set_section_flags (dynobj, htab->sbrlt, flags)
2367 || ! bfd_set_section_alignment (dynobj, htab->sbrlt, 3))
2368 return false;
2369
2370 if (info->shared)
2371 {
2372 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
2373 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2374 htab->srelbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
2375 if (!htab->srelbrlt
2376 || ! bfd_set_section_flags (dynobj, htab->srelbrlt, flags)
2377 || ! bfd_set_section_alignment (dynobj, htab->srelbrlt, 3))
2378 return false;
2379 }
2380 return true;
2381 }
2382
2383 /* Create .got and .rela.got sections in DYNOBJ, and set up
2384 shortcuts to them in our hash table. */
2385
2386 static boolean
2387 create_got_section (dynobj, info)
2388 bfd *dynobj;
2389 struct bfd_link_info *info;
2390 {
2391 struct ppc_link_hash_table *htab;
2392
2393 if (! _bfd_elf_create_got_section (dynobj, info))
2394 return false;
2395
2396 htab = ppc_hash_table (info);
2397 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
2398 if (!htab->sgot)
2399 abort ();
2400
2401 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
2402 if (!htab->srelgot
2403 || ! bfd_set_section_flags (dynobj, htab->srelgot,
2404 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2405 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2406 | SEC_READONLY))
2407 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
2408 return false;
2409 return true;
2410 }
2411
2412 /* Create the dynamic sections, and set up shortcuts. */
2413
2414 static boolean
2415 ppc64_elf_create_dynamic_sections (dynobj, info)
2416 bfd *dynobj;
2417 struct bfd_link_info *info;
2418 {
2419 struct ppc_link_hash_table *htab;
2420
2421 htab = ppc_hash_table (info);
2422 if (!htab->sgot && !create_got_section (dynobj, info))
2423 return false;
2424
2425 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2426 return false;
2427
2428 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2429 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
2430 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2431 if (!info->shared)
2432 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
2433
2434 if (!htab->splt || !htab->srelplt || !htab->sdynbss
2435 || (!info->shared && !htab->srelbss))
2436 abort ();
2437
2438 return true;
2439 }
2440
2441 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2442
2443 static void
2444 ppc64_elf_copy_indirect_symbol (bed, dir, ind)
2445 struct elf_backend_data *bed;
2446 struct elf_link_hash_entry *dir, *ind;
2447 {
2448 struct ppc_link_hash_entry *edir, *eind;
2449
2450 edir = (struct ppc_link_hash_entry *) dir;
2451 eind = (struct ppc_link_hash_entry *) ind;
2452
2453 if (eind->dyn_relocs != NULL)
2454 {
2455 if (edir->dyn_relocs != NULL)
2456 {
2457 struct ppc_dyn_relocs **pp;
2458 struct ppc_dyn_relocs *p;
2459
2460 if (ind->root.type == bfd_link_hash_indirect)
2461 abort ();
2462
2463 /* Add reloc counts against the weak sym to the strong sym
2464 list. Merge any entries against the same section. */
2465 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2466 {
2467 struct ppc_dyn_relocs *q;
2468
2469 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2470 if (q->sec == p->sec)
2471 {
2472 q->pc_count += p->pc_count;
2473 q->count += p->count;
2474 *pp = p->next;
2475 break;
2476 }
2477 if (q == NULL)
2478 pp = &p->next;
2479 }
2480 *pp = edir->dyn_relocs;
2481 }
2482
2483 edir->dyn_relocs = eind->dyn_relocs;
2484 eind->dyn_relocs = NULL;
2485 }
2486
2487 edir->is_func |= eind->is_func;
2488 edir->is_func_descriptor |= eind->is_func_descriptor;
2489 edir->is_entry |= eind->is_entry;
2490
2491 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
2492 }
2493
2494 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
2495 symbols undefined on the command-line. */
2496
2497 boolean
2498 ppc64_elf_mark_entry_syms (info)
2499 struct bfd_link_info *info;
2500 {
2501 struct ppc_link_hash_table *htab;
2502 struct bfd_sym_chain *sym;
2503
2504 htab = ppc_hash_table (info);
2505 for (sym = info->gc_sym_list; sym; sym = sym->next)
2506 {
2507 struct elf_link_hash_entry *h;
2508
2509 h = elf_link_hash_lookup (&htab->elf, sym->name, false, false, false);
2510 if (h != NULL)
2511 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
2512 }
2513 return true;
2514 }
2515
2516 /* Look through the relocs for a section during the first phase, and
2517 calculate needed space in the global offset table, procedure
2518 linkage table, and dynamic reloc sections. */
2519
2520 static boolean
2521 ppc64_elf_check_relocs (abfd, info, sec, relocs)
2522 bfd *abfd;
2523 struct bfd_link_info *info;
2524 asection *sec;
2525 const Elf_Internal_Rela *relocs;
2526 {
2527 struct ppc_link_hash_table *htab;
2528 Elf_Internal_Shdr *symtab_hdr;
2529 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
2530 const Elf_Internal_Rela *rel;
2531 const Elf_Internal_Rela *rel_end;
2532 asection *sreloc;
2533 asection **opd_sym_map;
2534
2535 if (info->relocateable)
2536 return true;
2537
2538 htab = ppc_hash_table (info);
2539 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2540
2541 sym_hashes = elf_sym_hashes (abfd);
2542 sym_hashes_end = (sym_hashes
2543 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
2544 - symtab_hdr->sh_info);
2545
2546 sreloc = NULL;
2547 opd_sym_map = NULL;
2548 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
2549 {
2550 /* Garbage collection needs some extra help with .opd sections.
2551 We don't want to necessarily keep everything referenced by
2552 relocs in .opd, as that would keep all functions. Instead,
2553 if we reference an .opd symbol (a function descriptor), we
2554 want to keep the function code symbol's section. This is
2555 easy for global symbols, but for local syms we need to keep
2556 information about the associated function section. Later, if
2557 edit_opd deletes entries, we'll use this array to adjust
2558 local syms in .opd. */
2559 union opd_info {
2560 asection *func_section;
2561 long entry_adjust;
2562 };
2563 bfd_size_type amt;
2564
2565 amt = sec->_raw_size * sizeof (union opd_info) / 24;
2566 opd_sym_map = (asection **) bfd_zalloc (abfd, amt);
2567 if (opd_sym_map == NULL)
2568 return false;
2569 elf_section_data (sec)->tdata = opd_sym_map;
2570 }
2571
2572 if (htab->elf.dynobj == NULL)
2573 htab->elf.dynobj = abfd;
2574 if (htab->sfpr == NULL
2575 && !create_linkage_sections (htab->elf.dynobj, info))
2576 return false;
2577
2578 rel_end = relocs + sec->reloc_count;
2579 for (rel = relocs; rel < rel_end; rel++)
2580 {
2581 unsigned long r_symndx;
2582 struct elf_link_hash_entry *h;
2583 enum elf_ppc_reloc_type r_type;
2584
2585 r_symndx = ELF64_R_SYM (rel->r_info);
2586 if (r_symndx < symtab_hdr->sh_info)
2587 h = NULL;
2588 else
2589 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2590
2591 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
2592 switch (r_type)
2593 {
2594 /* GOT16 relocations */
2595 case R_PPC64_GOT16:
2596 case R_PPC64_GOT16_DS:
2597 case R_PPC64_GOT16_HA:
2598 case R_PPC64_GOT16_HI:
2599 case R_PPC64_GOT16_LO:
2600 case R_PPC64_GOT16_LO_DS:
2601
2602 /* This symbol requires a global offset table entry. */
2603 if (htab->sgot == NULL
2604 && !create_got_section (htab->elf.dynobj, info))
2605 return false;
2606
2607 if (h != NULL)
2608 {
2609 h->got.refcount += 1;
2610 }
2611 else
2612 {
2613 bfd_signed_vma *local_got_refcounts;
2614
2615 /* This is a global offset table entry for a local symbol. */
2616 local_got_refcounts = elf_local_got_refcounts (abfd);
2617 if (local_got_refcounts == NULL)
2618 {
2619 bfd_size_type size;
2620
2621 size = symtab_hdr->sh_info;
2622 size *= sizeof (bfd_signed_vma);
2623 local_got_refcounts = ((bfd_signed_vma *)
2624 bfd_zalloc (abfd, size));
2625 if (local_got_refcounts == NULL)
2626 return false;
2627 elf_local_got_refcounts (abfd) = local_got_refcounts;
2628 }
2629 local_got_refcounts[r_symndx] += 1;
2630 }
2631 break;
2632
2633 case R_PPC64_PLT16_HA:
2634 case R_PPC64_PLT16_HI:
2635 case R_PPC64_PLT16_LO:
2636 case R_PPC64_PLT32:
2637 case R_PPC64_PLT64:
2638 /* This symbol requires a procedure linkage table entry. We
2639 actually build the entry in adjust_dynamic_symbol,
2640 because this might be a case of linking PIC code without
2641 linking in any dynamic objects, in which case we don't
2642 need to generate a procedure linkage table after all. */
2643 if (h == NULL)
2644 {
2645 /* It does not make sense to have a procedure linkage
2646 table entry for a local symbol. */
2647 bfd_set_error (bfd_error_bad_value);
2648 return false;
2649 }
2650
2651 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2652 h->plt.refcount += 1;
2653 ((struct ppc_link_hash_entry *) h)->is_func = 1;
2654 break;
2655
2656 /* The following relocations don't need to propagate the
2657 relocation if linking a shared object since they are
2658 section relative. */
2659 case R_PPC64_SECTOFF:
2660 case R_PPC64_SECTOFF_LO:
2661 case R_PPC64_SECTOFF_HI:
2662 case R_PPC64_SECTOFF_HA:
2663 case R_PPC64_SECTOFF_DS:
2664 case R_PPC64_SECTOFF_LO_DS:
2665 case R_PPC64_TOC16:
2666 case R_PPC64_TOC16_LO:
2667 case R_PPC64_TOC16_HI:
2668 case R_PPC64_TOC16_HA:
2669 case R_PPC64_TOC16_DS:
2670 case R_PPC64_TOC16_LO_DS:
2671 break;
2672
2673 /* This relocation describes the C++ object vtable hierarchy.
2674 Reconstruct it for later use during GC. */
2675 case R_PPC64_GNU_VTINHERIT:
2676 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2677 return false;
2678 break;
2679
2680 /* This relocation describes which C++ vtable entries are actually
2681 used. Record for later use during GC. */
2682 case R_PPC64_GNU_VTENTRY:
2683 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2684 return false;
2685 break;
2686
2687 case R_PPC64_REL14:
2688 case R_PPC64_REL14_BRTAKEN:
2689 case R_PPC64_REL14_BRNTAKEN:
2690 htab->has_14bit_branch = 1;
2691 /* Fall through. */
2692
2693 case R_PPC64_REL24:
2694 if (h != NULL
2695 && h->root.root.string[0] == '.'
2696 && h->root.root.string[1] != 0)
2697 {
2698 /* We may need a .plt entry if the function this reloc
2699 refers to is in a shared lib. */
2700 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2701 h->plt.refcount += 1;
2702 ((struct ppc_link_hash_entry *) h)->is_func = 1;
2703 }
2704 break;
2705
2706 case R_PPC64_ADDR64:
2707 if (opd_sym_map != NULL
2708 && h != NULL
2709 && h->root.root.string[0] == '.'
2710 && h->root.root.string[1] != 0)
2711 {
2712 struct elf_link_hash_entry *fdh;
2713
2714 fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
2715 false, false, false);
2716 if (fdh != NULL)
2717 {
2718 ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
2719 ((struct ppc_link_hash_entry *) fdh)->oh = h;
2720 ((struct ppc_link_hash_entry *) h)->is_func = 1;
2721 ((struct ppc_link_hash_entry *) h)->oh = fdh;
2722 }
2723 }
2724 if (opd_sym_map != NULL
2725 && h == NULL
2726 && rel + 1 < rel_end
2727 && ((enum elf_ppc_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info)
2728 == R_PPC64_TOC))
2729 {
2730 asection *s;
2731
2732 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
2733 r_symndx);
2734 if (s == NULL)
2735 return false;
2736 else if (s != sec)
2737 opd_sym_map[rel->r_offset / 24] = s;
2738 }
2739 /* Fall through. */
2740
2741 case R_PPC64_REL64:
2742 case R_PPC64_REL32:
2743 case R_PPC64_ADDR14:
2744 case R_PPC64_ADDR14_BRNTAKEN:
2745 case R_PPC64_ADDR14_BRTAKEN:
2746 case R_PPC64_ADDR16:
2747 case R_PPC64_ADDR16_DS:
2748 case R_PPC64_ADDR16_HA:
2749 case R_PPC64_ADDR16_HI:
2750 case R_PPC64_ADDR16_HIGHER:
2751 case R_PPC64_ADDR16_HIGHERA:
2752 case R_PPC64_ADDR16_HIGHEST:
2753 case R_PPC64_ADDR16_HIGHESTA:
2754 case R_PPC64_ADDR16_LO:
2755 case R_PPC64_ADDR16_LO_DS:
2756 case R_PPC64_ADDR24:
2757 case R_PPC64_ADDR30:
2758 case R_PPC64_ADDR32:
2759 case R_PPC64_UADDR16:
2760 case R_PPC64_UADDR32:
2761 case R_PPC64_UADDR64:
2762 case R_PPC64_TOC:
2763 /* Don't propagate .opd relocs. */
2764 if (NO_OPD_RELOCS && opd_sym_map != NULL)
2765 break;
2766
2767 /* If we are creating a shared library, and this is a reloc
2768 against a global symbol, or a non PC relative reloc
2769 against a local symbol, then we need to copy the reloc
2770 into the shared library. However, if we are linking with
2771 -Bsymbolic, we do not need to copy a reloc against a
2772 global symbol which is defined in an object we are
2773 including in the link (i.e., DEF_REGULAR is set). At
2774 this point we have not seen all the input files, so it is
2775 possible that DEF_REGULAR is not set now but will be set
2776 later (it is never cleared). In case of a weak definition,
2777 DEF_REGULAR may be cleared later by a strong definition in
2778 a shared library. We account for that possibility below by
2779 storing information in the relocs_copied field of the hash
2780 table entry. A similar situation occurs when creating
2781 shared libraries and symbol visibility changes render the
2782 symbol local.
2783
2784 If on the other hand, we are creating an executable, we
2785 may need to keep relocations for symbols satisfied by a
2786 dynamic library if we manage to avoid copy relocs for the
2787 symbol. */
2788 if ((info->shared
2789 && (sec->flags & SEC_ALLOC) != 0
2790 && (IS_ABSOLUTE_RELOC (r_type)
2791 || (h != NULL
2792 && (! info->symbolic
2793 || h->root.type == bfd_link_hash_defweak
2794 || (h->elf_link_hash_flags
2795 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2796 || (!info->shared
2797 && (sec->flags & SEC_ALLOC) != 0
2798 && h != NULL
2799 && (h->root.type == bfd_link_hash_defweak
2800 || (h->elf_link_hash_flags
2801 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
2802 {
2803 struct ppc_dyn_relocs *p;
2804 struct ppc_dyn_relocs **head;
2805
2806 /* We must copy these reloc types into the output file.
2807 Create a reloc section in dynobj and make room for
2808 this reloc. */
2809 if (sreloc == NULL)
2810 {
2811 const char *name;
2812 bfd *dynobj;
2813
2814 name = (bfd_elf_string_from_elf_section
2815 (abfd,
2816 elf_elfheader (abfd)->e_shstrndx,
2817 elf_section_data (sec)->rel_hdr.sh_name));
2818 if (name == NULL)
2819 return false;
2820
2821 if (strncmp (name, ".rela", 5) != 0
2822 || strcmp (bfd_get_section_name (abfd, sec),
2823 name + 5) != 0)
2824 {
2825 (*_bfd_error_handler)
2826 (_("%s: bad relocation section name `%s\'"),
2827 bfd_archive_filename (abfd), name);
2828 bfd_set_error (bfd_error_bad_value);
2829 }
2830
2831 dynobj = htab->elf.dynobj;
2832 sreloc = bfd_get_section_by_name (dynobj, name);
2833 if (sreloc == NULL)
2834 {
2835 flagword flags;
2836
2837 sreloc = bfd_make_section (dynobj, name);
2838 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2839 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2840 if ((sec->flags & SEC_ALLOC) != 0)
2841 flags |= SEC_ALLOC | SEC_LOAD;
2842 if (sreloc == NULL
2843 || ! bfd_set_section_flags (dynobj, sreloc, flags)
2844 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
2845 return false;
2846 }
2847 elf_section_data (sec)->sreloc = sreloc;
2848 }
2849
2850 /* If this is a global symbol, we count the number of
2851 relocations we need for this symbol. */
2852 if (h != NULL)
2853 {
2854 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
2855 }
2856 else
2857 {
2858 /* Track dynamic relocs needed for local syms too.
2859 We really need local syms available to do this
2860 easily. Oh well. */
2861
2862 asection *s;
2863 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
2864 sec, r_symndx);
2865 if (s == NULL)
2866 return false;
2867
2868 head = ((struct ppc_dyn_relocs **)
2869 &elf_section_data (s)->local_dynrel);
2870 }
2871
2872 p = *head;
2873 if (p == NULL || p->sec != sec)
2874 {
2875 p = ((struct ppc_dyn_relocs *)
2876 bfd_alloc (htab->elf.dynobj,
2877 (bfd_size_type) sizeof *p));
2878 if (p == NULL)
2879 return false;
2880 p->next = *head;
2881 *head = p;
2882 p->sec = sec;
2883 p->count = 0;
2884 p->pc_count = 0;
2885 }
2886
2887 p->count += 1;
2888 if (!IS_ABSOLUTE_RELOC (r_type))
2889 p->pc_count += 1;
2890 }
2891 break;
2892
2893 default:
2894 break;
2895 }
2896 }
2897
2898 return true;
2899 }
2900
2901 /* Return the section that should be marked against GC for a given
2902 relocation. */
2903
2904 static asection *
2905 ppc64_elf_gc_mark_hook (sec, info, rel, h, sym)
2906 asection *sec;
2907 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2908 Elf_Internal_Rela *rel;
2909 struct elf_link_hash_entry *h;
2910 Elf_Internal_Sym *sym;
2911 {
2912 asection *rsec = NULL;
2913
2914 if (h != NULL)
2915 {
2916 enum elf_ppc_reloc_type r_type;
2917 struct ppc_link_hash_entry *fdh;
2918
2919 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
2920 switch (r_type)
2921 {
2922 case R_PPC64_GNU_VTINHERIT:
2923 case R_PPC64_GNU_VTENTRY:
2924 break;
2925
2926 default:
2927 switch (h->root.type)
2928 {
2929 case bfd_link_hash_defined:
2930 case bfd_link_hash_defweak:
2931 fdh = (struct ppc_link_hash_entry *) h;
2932
2933 /* Function descriptor syms cause the associated
2934 function code sym section to be marked. */
2935 if (fdh->is_func_descriptor)
2936 rsec = fdh->oh->root.u.def.section;
2937
2938 /* Function entry syms return NULL if they are in .opd
2939 and are not ._start (or others undefined on the ld
2940 command line). Thus we avoid marking all function
2941 sections, as all functions are referenced in .opd. */
2942 else if ((fdh->oh != NULL
2943 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
2944 || elf_section_data (sec)->tdata == NULL)
2945 rsec = h->root.u.def.section;
2946 break;
2947
2948 case bfd_link_hash_common:
2949 rsec = h->root.u.c.p->section;
2950 break;
2951
2952 default:
2953 break;
2954 }
2955 }
2956 }
2957 else
2958 {
2959 asection **opd_sym_section;
2960
2961 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
2962 opd_sym_section = (asection **) elf_section_data (rsec)->tdata;
2963 if (opd_sym_section != NULL)
2964 rsec = opd_sym_section[sym->st_value / 24];
2965 else if (elf_section_data (sec)->tdata != NULL)
2966 rsec = NULL;
2967 }
2968
2969 return rsec;
2970 }
2971
2972 /* Update the .got, .plt. and dynamic reloc reference counts for the
2973 section being removed. */
2974
2975 static boolean
2976 ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs)
2977 bfd *abfd;
2978 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2979 asection *sec;
2980 const Elf_Internal_Rela *relocs;
2981 {
2982 Elf_Internal_Shdr *symtab_hdr;
2983 struct elf_link_hash_entry **sym_hashes;
2984 bfd_signed_vma *local_got_refcounts;
2985 const Elf_Internal_Rela *rel, *relend;
2986
2987 elf_section_data (sec)->local_dynrel = NULL;
2988
2989 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2990 sym_hashes = elf_sym_hashes (abfd);
2991 local_got_refcounts = elf_local_got_refcounts (abfd);
2992
2993 relend = relocs + sec->reloc_count;
2994 for (rel = relocs; rel < relend; rel++)
2995 {
2996 unsigned long r_symndx;
2997 enum elf_ppc_reloc_type r_type;
2998 struct elf_link_hash_entry *h;
2999
3000 r_symndx = ELF64_R_SYM (rel->r_info);
3001 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
3002 switch (r_type)
3003 {
3004 case R_PPC64_GOT16:
3005 case R_PPC64_GOT16_DS:
3006 case R_PPC64_GOT16_HA:
3007 case R_PPC64_GOT16_HI:
3008 case R_PPC64_GOT16_LO:
3009 case R_PPC64_GOT16_LO_DS:
3010 if (r_symndx >= symtab_hdr->sh_info)
3011 {
3012 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3013 if (h->got.refcount > 0)
3014 h->got.refcount--;
3015 }
3016 else
3017 {
3018 if (local_got_refcounts[r_symndx] > 0)
3019 local_got_refcounts[r_symndx]--;
3020 }
3021 break;
3022
3023 case R_PPC64_PLT16_HA:
3024 case R_PPC64_PLT16_HI:
3025 case R_PPC64_PLT16_LO:
3026 case R_PPC64_PLT32:
3027 case R_PPC64_PLT64:
3028 if (r_symndx >= symtab_hdr->sh_info)
3029 {
3030 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3031 if (h->plt.refcount > 0)
3032 h->plt.refcount--;
3033 }
3034 break;
3035
3036 case R_PPC64_REL14:
3037 case R_PPC64_REL14_BRNTAKEN:
3038 case R_PPC64_REL14_BRTAKEN:
3039 case R_PPC64_REL24:
3040 if (r_symndx >= symtab_hdr->sh_info)
3041 {
3042 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3043 if (h->plt.refcount > 0)
3044 h->plt.refcount--;
3045 }
3046 break;
3047
3048 case R_PPC64_REL32:
3049 case R_PPC64_REL64:
3050 if (r_symndx >= symtab_hdr->sh_info)
3051 {
3052 struct ppc_link_hash_entry *eh;
3053 struct ppc_dyn_relocs **pp;
3054 struct ppc_dyn_relocs *p;
3055
3056 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3057 eh = (struct ppc_link_hash_entry *) h;
3058
3059 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3060 if (p->sec == sec)
3061 {
3062 p->pc_count -= 1;
3063 p->count -= 1;
3064 if (p->count == 0)
3065 *pp = p->next;
3066 break;
3067 }
3068 }
3069 break;
3070
3071 case R_PPC64_ADDR14:
3072 case R_PPC64_ADDR14_BRNTAKEN:
3073 case R_PPC64_ADDR14_BRTAKEN:
3074 case R_PPC64_ADDR16:
3075 case R_PPC64_ADDR16_DS:
3076 case R_PPC64_ADDR16_HA:
3077 case R_PPC64_ADDR16_HI:
3078 case R_PPC64_ADDR16_HIGHER:
3079 case R_PPC64_ADDR16_HIGHERA:
3080 case R_PPC64_ADDR16_HIGHEST:
3081 case R_PPC64_ADDR16_HIGHESTA:
3082 case R_PPC64_ADDR16_LO:
3083 case R_PPC64_ADDR16_LO_DS:
3084 case R_PPC64_ADDR24:
3085 case R_PPC64_ADDR30:
3086 case R_PPC64_ADDR32:
3087 case R_PPC64_ADDR64:
3088 case R_PPC64_UADDR16:
3089 case R_PPC64_UADDR32:
3090 case R_PPC64_UADDR64:
3091 case R_PPC64_TOC:
3092 if (r_symndx >= symtab_hdr->sh_info)
3093 {
3094 struct ppc_link_hash_entry *eh;
3095 struct ppc_dyn_relocs **pp;
3096 struct ppc_dyn_relocs *p;
3097
3098 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3099 eh = (struct ppc_link_hash_entry *) h;
3100
3101 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3102 if (p->sec == sec)
3103 {
3104 p->count -= 1;
3105 if (p->count == 0)
3106 *pp = p->next;
3107 break;
3108 }
3109 }
3110 break;
3111
3112 default:
3113 break;
3114 }
3115 }
3116 return true;
3117 }
3118
3119 /* Called via elf_link_hash_traverse to transfer dynamic linking
3120 information on function code symbol entries to their corresponding
3121 function descriptor symbol entries. */
3122 static boolean
3123 func_desc_adjust (h, inf)
3124 struct elf_link_hash_entry *h;
3125 PTR inf;
3126 {
3127 struct bfd_link_info *info;
3128 struct ppc_link_hash_table *htab;
3129
3130 if (h->root.type == bfd_link_hash_indirect)
3131 return true;
3132
3133 if (h->root.type == bfd_link_hash_warning)
3134 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3135
3136 info = (struct bfd_link_info *) inf;
3137 htab = ppc_hash_table (info);
3138
3139 /* If this is a function code symbol, transfer dynamic linking
3140 information to the function descriptor symbol. */
3141 if (!((struct ppc_link_hash_entry *) h)->is_func)
3142 return true;
3143
3144 if (h->root.type == bfd_link_hash_undefweak
3145 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
3146 htab->have_undefweak = true;
3147
3148 if (h->plt.refcount > 0
3149 && h->root.root.string[0] == '.'
3150 && h->root.root.string[1] != '\0')
3151 {
3152 struct elf_link_hash_entry *fdh = ((struct ppc_link_hash_entry *) h)->oh;
3153 boolean force_local;
3154
3155 /* Find the corresponding function descriptor symbol. Create it
3156 as undefined if necessary. */
3157
3158 if (fdh == NULL)
3159 fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
3160 false, false, true);
3161
3162 if (fdh == NULL
3163 && info->shared
3164 && (h->root.type == bfd_link_hash_undefined
3165 || h->root.type == bfd_link_hash_undefweak))
3166 {
3167 bfd *abfd;
3168 asymbol *newsym;
3169 struct bfd_link_hash_entry *bh;
3170
3171 abfd = h->root.u.undef.abfd;
3172 newsym = bfd_make_empty_symbol (abfd);
3173 newsym->name = h->root.root.string + 1;
3174 newsym->section = bfd_und_section_ptr;
3175 newsym->value = 0;
3176 newsym->flags = BSF_OBJECT;
3177 if (h->root.type == bfd_link_hash_undefweak)
3178 newsym->flags |= BSF_WEAK;
3179
3180 bh = &fdh->root;
3181 if ( !(_bfd_generic_link_add_one_symbol
3182 (info, abfd, newsym->name, newsym->flags,
3183 newsym->section, newsym->value, NULL, false, false, &bh)))
3184 {
3185 return false;
3186 }
3187 fdh = (struct elf_link_hash_entry *) bh;
3188 fdh->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
3189 }
3190
3191 if (fdh != NULL
3192 && (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
3193 && (info->shared
3194 || (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3195 || (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0))
3196 {
3197 if (fdh->dynindx == -1)
3198 if (! bfd_elf64_link_record_dynamic_symbol (info, fdh))
3199 return false;
3200 fdh->elf_link_hash_flags |= (h->elf_link_hash_flags
3201 & (ELF_LINK_HASH_REF_REGULAR
3202 | ELF_LINK_HASH_REF_DYNAMIC
3203 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
3204 | ELF_LINK_NON_GOT_REF));
3205 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3206 {
3207 fdh->plt.refcount = h->plt.refcount;
3208 fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3209 }
3210 ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
3211 ((struct ppc_link_hash_entry *) fdh)->oh = h;
3212 ((struct ppc_link_hash_entry *) h)->oh = fdh;
3213 }
3214
3215 /* Now that the info is on the function descriptor, clear the
3216 function code sym info. Any function code syms for which we
3217 don't have a definition in a regular file, we force local.
3218 This prevents a shared library from exporting syms that have
3219 been imported from another library. Function code syms that
3220 are really in the library we must leave global to prevent the
3221 linker dragging in a definition from a static library. */
3222 force_local = (info->shared
3223 && ((h->elf_link_hash_flags
3224 & ELF_LINK_HASH_DEF_REGULAR) == 0
3225 || fdh == NULL
3226 || (fdh->elf_link_hash_flags
3227 & ELF_LINK_HASH_DEF_REGULAR) == 0
3228 || (fdh->elf_link_hash_flags
3229 & ELF_LINK_FORCED_LOCAL) != 0));
3230 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
3231 }
3232
3233 return true;
3234 }
3235
3236 #define MIN_SAVE_FPR 14
3237 #define MAX_SAVE_FPR 31
3238
3239 /* Called near the start of bfd_elf_size_dynamic_sections. We use
3240 this hook to a) provide some gcc support functions, and b) transfer
3241 dynamic linking information gathered so far on function code symbol
3242 entries, to their corresponding function descriptor symbol entries. */
3243 static boolean
3244 ppc64_elf_func_desc_adjust (obfd, info)
3245 bfd *obfd ATTRIBUTE_UNUSED;
3246 struct bfd_link_info *info;
3247 {
3248 struct ppc_link_hash_table *htab;
3249 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
3250 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
3251 unsigned int i;
3252 struct elf_link_hash_entry *h;
3253 bfd_byte *p;
3254 char sym[10];
3255
3256 htab = ppc_hash_table (info);
3257
3258 if (htab->sfpr == NULL)
3259 /* We don't have any relocs. */
3260 return true;
3261
3262 /* First provide any missing ._savef* and ._restf* functions. */
3263 memcpy (sym, "._savef14", 10);
3264 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
3265 {
3266 sym[7] = i / 10 + '0';
3267 sym[8] = i % 10 + '0';
3268 h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
3269 if (h != NULL
3270 && h->root.type == bfd_link_hash_undefined)
3271 {
3272 if (lowest_savef > i)
3273 lowest_savef = i;
3274 h->root.type = bfd_link_hash_defined;
3275 h->root.u.def.section = htab->sfpr;
3276 h->root.u.def.value = (i - lowest_savef) * 4;
3277 h->type = STT_FUNC;
3278 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
3279 _bfd_elf_link_hash_hide_symbol (info, h, info->shared);
3280 }
3281 }
3282
3283 memcpy (sym, "._restf14", 10);
3284 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
3285 {
3286 sym[7] = i / 10 + '0';
3287 sym[8] = i % 10 + '0';
3288 h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
3289 if (h != NULL
3290 && h->root.type == bfd_link_hash_undefined)
3291 {
3292 if (lowest_restf > i)
3293 lowest_restf = i;
3294 h->root.type = bfd_link_hash_defined;
3295 h->root.u.def.section = htab->sfpr;
3296 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
3297 + (i - lowest_restf) * 4);
3298 h->type = STT_FUNC;
3299 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
3300 _bfd_elf_link_hash_hide_symbol (info, h, info->shared);
3301 }
3302 }
3303
3304 elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info);
3305
3306 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
3307 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
3308
3309 if (htab->sfpr->_raw_size == 0)
3310 {
3311 if (!htab->have_undefweak)
3312 {
3313 _bfd_strip_section_from_output (info, htab->sfpr);
3314 return true;
3315 }
3316
3317 htab->sfpr->_raw_size = 4;
3318 }
3319
3320 p = (bfd_byte *) bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
3321 if (p == NULL)
3322 return false;
3323 htab->sfpr->contents = p;
3324
3325 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
3326 {
3327 unsigned int fpr = i << 21;
3328 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
3329 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
3330 p += 4;
3331 }
3332 if (lowest_savef <= MAX_SAVE_FPR)
3333 {
3334 bfd_put_32 (htab->elf.dynobj, BLR, p);
3335 p += 4;
3336 }
3337
3338 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
3339 {
3340 unsigned int fpr = i << 21;
3341 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
3342 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
3343 p += 4;
3344 }
3345 if (lowest_restf <= MAX_SAVE_FPR
3346 || htab->sfpr->_raw_size == 4)
3347 {
3348 bfd_put_32 (htab->elf.dynobj, BLR, p);
3349 }
3350
3351 return true;
3352 }
3353
3354 /* Adjust a symbol defined by a dynamic object and referenced by a
3355 regular object. The current definition is in some section of the
3356 dynamic object, but we're not including those sections. We have to
3357 change the definition to something the rest of the link can
3358 understand. */
3359
3360 static boolean
3361 ppc64_elf_adjust_dynamic_symbol (info, h)
3362 struct bfd_link_info *info;
3363 struct elf_link_hash_entry *h;
3364 {
3365 struct ppc_link_hash_table *htab;
3366 struct ppc_link_hash_entry * eh;
3367 struct ppc_dyn_relocs *p;
3368 asection *s;
3369 unsigned int power_of_two;
3370
3371 htab = ppc_hash_table (info);
3372
3373 /* Deal with function syms. */
3374 if (h->type == STT_FUNC
3375 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
3376 {
3377 /* Clear procedure linkage table information for any symbol that
3378 won't need a .plt entry. */
3379 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
3380 || h->plt.refcount <= 0
3381 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
3382 || (! info->shared
3383 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
3384 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0))
3385 {
3386 h->plt.offset = (bfd_vma) -1;
3387 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3388 }
3389 return true;
3390 }
3391 else
3392 h->plt.offset = (bfd_vma) -1;
3393
3394 /* If this is a weak symbol, and there is a real definition, the
3395 processor independent code will have arranged for us to see the
3396 real definition first, and we can just use the same value. */
3397 if (h->weakdef != NULL)
3398 {
3399 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
3400 || h->weakdef->root.type == bfd_link_hash_defweak);
3401 h->root.u.def.section = h->weakdef->root.u.def.section;
3402 h->root.u.def.value = h->weakdef->root.u.def.value;
3403 return true;
3404 }
3405
3406 /* This is a reference to a symbol defined by a dynamic object which
3407 is not a function. */
3408
3409 /* If we are creating a shared library, we must presume that the
3410 only references to the symbol are via the global offset table.
3411 For such cases we need not do anything here; the relocations will
3412 be handled correctly by relocate_section. */
3413 if (info->shared)
3414 return true;
3415
3416 /* If there are no references to this symbol that do not use the
3417 GOT, we don't need to generate a copy reloc. */
3418 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
3419 return true;
3420
3421 eh = (struct ppc_link_hash_entry *) h;
3422 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3423 {
3424 s = p->sec->output_section;
3425 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3426 break;
3427 }
3428
3429 /* If we didn't find any dynamic relocs in read-only sections, then
3430 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
3431 if (p == NULL)
3432 {
3433 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
3434 return true;
3435 }
3436
3437 /* We must allocate the symbol in our .dynbss section, which will
3438 become part of the .bss section of the executable. There will be
3439 an entry for this symbol in the .dynsym section. The dynamic
3440 object will contain position independent code, so all references
3441 from the dynamic object to this symbol will go through the global
3442 offset table. The dynamic linker will use the .dynsym entry to
3443 determine the address it must put in the global offset table, so
3444 both the dynamic object and the regular object will refer to the
3445 same memory location for the variable. */
3446
3447 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
3448 copy the initial value out of the dynamic object and into the
3449 runtime process image. We need to remember the offset into the
3450 .rela.bss section we are going to use. */
3451 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3452 {
3453 htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
3454 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
3455 }
3456
3457 /* We need to figure out the alignment required for this symbol. I
3458 have no idea how ELF linkers handle this. */
3459 power_of_two = bfd_log2 (h->size);
3460 if (power_of_two > 4)
3461 power_of_two = 4;
3462
3463 /* Apply the required alignment. */
3464 s = htab->sdynbss;
3465 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
3466 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
3467 {
3468 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
3469 return false;
3470 }
3471
3472 /* Define the symbol as being at this point in the section. */
3473 h->root.u.def.section = s;
3474 h->root.u.def.value = s->_raw_size;
3475
3476 /* Increment the section size to make room for the symbol. */
3477 s->_raw_size += h->size;
3478
3479 return true;
3480 }
3481
3482 /* If given a function descriptor symbol, hide both the function code
3483 sym and the descriptor. */
3484 static void
3485 ppc64_elf_hide_symbol (info, h, force_local)
3486 struct bfd_link_info *info;
3487 struct elf_link_hash_entry *h;
3488 boolean force_local;
3489 {
3490 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
3491
3492 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
3493 {
3494 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
3495
3496 if (fh == NULL)
3497 {
3498 const char *p, *q;
3499 struct ppc_link_hash_table *htab;
3500 char save;
3501
3502 /* We aren't supposed to use alloca in BFD because on
3503 systems which do not have alloca the version in libiberty
3504 calls xmalloc, which might cause the program to crash
3505 when it runs out of memory. This function doesn't have a
3506 return status, so there's no way to gracefully return an
3507 error. So cheat. We know that string[-1] can be safely
3508 dereferenced; It's either a string in an ELF string
3509 table, or allocated in an objalloc structure. */
3510
3511 p = h->root.root.string - 1;
3512 save = *p;
3513 *(char *) p = '.';
3514 htab = ppc_hash_table (info);
3515 fh = elf_link_hash_lookup (&htab->elf, p, false, false, false);
3516 *(char *) p = save;
3517
3518 /* Unfortunately, if it so happens that the string we were
3519 looking for was allocated immediately before this string,
3520 then we overwrote the string terminator. That's the only
3521 reason the lookup should fail. */
3522 if (fh == NULL)
3523 {
3524 q = h->root.root.string + strlen (h->root.root.string);
3525 while (q >= h->root.root.string && *q == *p)
3526 --q, --p;
3527 if (q < h->root.root.string && *p == '.')
3528 fh = elf_link_hash_lookup (&htab->elf, p, false, false, false);
3529 }
3530 if (fh != NULL)
3531 {
3532 ((struct ppc_link_hash_entry *) h)->oh = fh;
3533 ((struct ppc_link_hash_entry *) fh)->oh = h;
3534 }
3535 }
3536 if (fh != NULL)
3537 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
3538 }
3539 }
3540
3541 static boolean
3542 edit_opd (obfd, info)
3543 bfd *obfd;
3544 struct bfd_link_info *info;
3545 {
3546 bfd *ibfd;
3547 unsigned int bfd_indx;
3548
3549 for (bfd_indx = 0, ibfd = info->input_bfds;
3550 ibfd != NULL;
3551 ibfd = ibfd->link_next, bfd_indx++)
3552 {
3553 asection *sec;
3554 Elf_Internal_Rela *relstart, *rel, *relend;
3555 Elf_Internal_Shdr *symtab_hdr;
3556 Elf_Internal_Sym *local_syms;
3557 struct elf_link_hash_entry **sym_hashes;
3558 bfd_vma offset;
3559 long *adjust;
3560 boolean need_edit;
3561
3562 sec = bfd_get_section_by_name (ibfd, ".opd");
3563 if (sec == NULL)
3564 continue;
3565
3566 adjust = (long *) elf_section_data (sec)->tdata;
3567 BFD_ASSERT (adjust != NULL);
3568 memset (adjust, 0, (size_t) sec->_raw_size * sizeof (long) / 24);
3569
3570 if (sec->output_section == bfd_abs_section_ptr)
3571 continue;
3572
3573 /* Look through the section relocs. */
3574 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
3575 continue;
3576
3577 local_syms = NULL;
3578 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3579 sym_hashes = elf_sym_hashes (ibfd);
3580
3581 /* Read the relocations. */
3582 relstart = _bfd_elf64_link_read_relocs (obfd, sec, (PTR) NULL,
3583 (Elf_Internal_Rela *) NULL,
3584 info->keep_memory);
3585 if (relstart == NULL)
3586 return false;
3587
3588 /* First run through the relocs to check they are sane, and to
3589 determine whether we need to edit this opd section. */
3590 need_edit = false;
3591 offset = 0;
3592 relend = relstart + sec->reloc_count;
3593 for (rel = relstart; rel < relend; rel++)
3594 {
3595 enum elf_ppc_reloc_type r_type;
3596 unsigned long r_symndx;
3597 asection *sym_sec;
3598 struct elf_link_hash_entry *h;
3599 Elf_Internal_Sym *sym;
3600
3601 /* .opd contains a regular array of 24 byte entries. We're
3602 only interested in the reloc pointing to a function entry
3603 point. */
3604 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
3605 if (r_type == R_PPC64_TOC)
3606 continue;
3607
3608 if (r_type != R_PPC64_ADDR64)
3609 {
3610 (*_bfd_error_handler)
3611 (_("%s: unexpected reloc type %u in .opd section"),
3612 bfd_archive_filename (ibfd), r_type);
3613 need_edit = false;
3614 break;
3615 }
3616
3617 if (rel + 1 >= relend)
3618 continue;
3619 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info);
3620 if (r_type != R_PPC64_TOC)
3621 continue;
3622
3623 if (rel->r_offset != offset)
3624 {
3625 /* If someone messes with .opd alignment then after a
3626 "ld -r" we might have padding in the middle of .opd.
3627 Also, there's nothing to prevent someone putting
3628 something silly in .opd with the assembler. No .opd
3629 optimization for them! */
3630 (*_bfd_error_handler)
3631 (_("%s: .opd is not a regular array of opd entries"),
3632 bfd_archive_filename (ibfd));
3633 need_edit = false;
3634 break;
3635 }
3636
3637 r_symndx = ELF64_R_SYM (rel->r_info);
3638 sym_sec = NULL;
3639 h = NULL;
3640 sym = NULL;
3641 if (r_symndx >= symtab_hdr->sh_info)
3642 {
3643 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3644 while (h->root.type == bfd_link_hash_indirect
3645 || h->root.type == bfd_link_hash_warning)
3646 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3647 if (h->root.type == bfd_link_hash_defined
3648 || h->root.type == bfd_link_hash_defweak)
3649 sym_sec = h->root.u.def.section;
3650 }
3651 else
3652 {
3653 if (local_syms == NULL)
3654 {
3655 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3656 if (local_syms == NULL)
3657 local_syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3658 symtab_hdr->sh_info, 0,
3659 NULL, NULL, NULL);
3660 if (local_syms == NULL)
3661 goto error_free_rel;
3662 }
3663 sym = local_syms + r_symndx;
3664 if ((sym->st_shndx != SHN_UNDEF
3665 && sym->st_shndx < SHN_LORESERVE)
3666 || sym->st_shndx > SHN_HIRESERVE)
3667 sym_sec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
3668 }
3669
3670 if (sym_sec == NULL || sym_sec->owner == NULL)
3671 {
3672 (*_bfd_error_handler)
3673 (_("%s: undefined sym `%s' in .opd section"),
3674 bfd_archive_filename (ibfd),
3675 h != NULL ? h->root.root.string : "<local symbol>");
3676 need_edit = false;
3677 break;
3678 }
3679
3680 /* opd entries are always for functions defined in the
3681 current input bfd. If the symbol isn't defined in the
3682 input bfd, then we won't be using the function in this
3683 bfd; It must be defined in a linkonce section in another
3684 bfd, or is weak. It's also possible that we are
3685 discarding the function due to a linker script /DISCARD/,
3686 which we test for via the output_section. */
3687 if (sym_sec->owner != ibfd
3688 || sym_sec->output_section == bfd_abs_section_ptr)
3689 need_edit = true;
3690
3691 offset += 24;
3692 }
3693
3694 if (need_edit)
3695 {
3696 Elf_Internal_Rela *write_rel;
3697 bfd_byte *rptr, *wptr;
3698 boolean skip;
3699
3700 /* This seems a waste of time as input .opd sections are all
3701 zeros as generated by gcc, but I suppose there's no reason
3702 this will always be so. We might start putting something in
3703 the third word of .opd entries. */
3704 if ((sec->flags & SEC_IN_MEMORY) == 0)
3705 {
3706 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
3707 if (loc == NULL
3708 || !bfd_get_section_contents (ibfd, sec, loc, (bfd_vma) 0,
3709 sec->_raw_size))
3710 {
3711 if (local_syms != NULL
3712 && symtab_hdr->contents != (unsigned char *) local_syms)
3713 free (local_syms);
3714 error_free_rel:
3715 if (elf_section_data (sec)->relocs != relstart)
3716 free (relstart);
3717 return false;
3718 }
3719 sec->contents = loc;
3720 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
3721 }
3722
3723 elf_section_data (sec)->relocs = relstart;
3724
3725 wptr = sec->contents;
3726 rptr = sec->contents;
3727 write_rel = relstart;
3728 skip = false;
3729 offset = 0;
3730 for (rel = relstart; rel < relend; rel++)
3731 {
3732 if (rel->r_offset == offset)
3733 {
3734 unsigned long r_symndx;
3735 asection *sym_sec;
3736 struct elf_link_hash_entry *h;
3737 Elf_Internal_Sym *sym;
3738
3739 r_symndx = ELF64_R_SYM (rel->r_info);
3740 sym_sec = NULL;
3741 h = NULL;
3742 sym = NULL;
3743 if (r_symndx >= symtab_hdr->sh_info)
3744 {
3745 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3746 while (h->root.type == bfd_link_hash_indirect
3747 || h->root.type == bfd_link_hash_warning)
3748 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3749 if (h->root.type == bfd_link_hash_defined
3750 || h->root.type == bfd_link_hash_defweak)
3751 sym_sec = h->root.u.def.section;
3752 }
3753 else
3754 {
3755 sym = local_syms + r_symndx;
3756 if ((sym->st_shndx != SHN_UNDEF
3757 && sym->st_shndx < SHN_LORESERVE)
3758 || sym->st_shndx > SHN_HIRESERVE)
3759 sym_sec = bfd_section_from_elf_index (ibfd,
3760 sym->st_shndx);
3761 }
3762
3763 skip = (sym_sec->owner != ibfd
3764 || sym_sec->output_section == bfd_abs_section_ptr);
3765 if (skip)
3766 {
3767 if (h != NULL && sym_sec->owner == ibfd)
3768 {
3769 /* Arrange for the function descriptor sym
3770 to be dropped. */
3771 struct elf_link_hash_entry *fdh;
3772 struct ppc_link_hash_entry *fh;
3773
3774 fh = (struct ppc_link_hash_entry *) h;
3775 BFD_ASSERT (fh->is_func);
3776 fdh = fh->oh;
3777 fdh->root.u.def.value = 0;
3778 fdh->root.u.def.section = sym_sec;
3779 }
3780 }
3781 else
3782 {
3783 /* We'll be keeping this opd entry. */
3784
3785 if (h != NULL)
3786 {
3787 /* Redefine the function descriptor symbol
3788 to this location in the opd section.
3789 We've checked above that opd relocs are
3790 ordered. */
3791 struct elf_link_hash_entry *fdh;
3792 struct ppc_link_hash_entry *fh;
3793
3794 fh = (struct ppc_link_hash_entry *) h;
3795 BFD_ASSERT (fh->is_func);
3796 fdh = fh->oh;
3797 fdh->root.u.def.value = wptr - sec->contents;
3798 }
3799 else
3800 {
3801 /* Local syms are a bit tricky. We could
3802 tweak them as they can be cached, but
3803 we'd need to look through the local syms
3804 for the function descriptor sym which we
3805 don't have at the moment. So keep an
3806 array of adjustments. */
3807 adjust[rel->r_offset / 24] = wptr - rptr;
3808 }
3809
3810 if (wptr != rptr)
3811 memcpy (wptr, rptr, 24);
3812 wptr += 24;
3813 }
3814 rptr += 24;
3815 offset += 24;
3816 }
3817
3818 /* We need to adjust any reloc offsets to point to the
3819 new opd entries. While we're at it, we may as well
3820 remove redundant relocs. */
3821 if (!skip)
3822 {
3823 rel->r_offset += wptr - rptr;
3824 if (write_rel != rel)
3825 memcpy (write_rel, rel, sizeof (*rel));
3826 ++write_rel;
3827 }
3828 }
3829
3830 sec->_cooked_size = wptr - sec->contents;
3831 sec->reloc_count = write_rel - relstart;
3832 }
3833 else if (elf_section_data (sec)->relocs != relstart)
3834 free (relstart);
3835
3836 if (local_syms != NULL
3837 && symtab_hdr->contents != (unsigned char *) local_syms)
3838 {
3839 if (!info->keep_memory)
3840 free (local_syms);
3841 else
3842 symtab_hdr->contents = (unsigned char *) local_syms;
3843 }
3844 }
3845
3846 return true;
3847 }
3848
3849 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
3850 will be called from elflink.h. If elflink.h doesn't call our
3851 finish_dynamic_symbol routine, we'll need to do something about
3852 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
3853 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
3854 ((DYN) \
3855 && ((INFO)->shared \
3856 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
3857 && ((H)->dynindx != -1 \
3858 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
3859
3860 /* Allocate space in .plt, .got and associated reloc sections for
3861 dynamic relocs. */
3862
3863 static boolean
3864 allocate_dynrelocs (h, inf)
3865 struct elf_link_hash_entry *h;
3866 PTR inf;
3867 {
3868 struct bfd_link_info *info;
3869 struct ppc_link_hash_table *htab;
3870 asection *s;
3871 struct ppc_link_hash_entry *eh;
3872 struct ppc_dyn_relocs *p;
3873
3874 if (h->root.type == bfd_link_hash_indirect)
3875 return true;
3876
3877 if (h->root.type == bfd_link_hash_warning)
3878 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3879
3880 info = (struct bfd_link_info *) inf;
3881 htab = ppc_hash_table (info);
3882
3883 if (htab->elf.dynamic_sections_created
3884 && h->plt.refcount > 0
3885 && h->dynindx != -1)
3886 {
3887 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
3888
3889 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
3890 {
3891 /* If this is the first .plt entry, make room for the special
3892 first entry. */
3893 s = htab->splt;
3894 if (s->_raw_size == 0)
3895 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
3896
3897 h->plt.offset = s->_raw_size;
3898
3899 /* Make room for this entry. */
3900 s->_raw_size += PLT_ENTRY_SIZE;
3901
3902 /* Make room for the .glink code. */
3903 s = htab->sglink;
3904 if (s->_raw_size == 0)
3905 s->_raw_size += GLINK_CALL_STUB_SIZE;
3906 /* We need bigger stubs past index 32767. */
3907 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
3908 s->_raw_size += 4;
3909 s->_raw_size += 2*4;
3910
3911 /* We also need to make an entry in the .rela.plt section. */
3912 s = htab->srelplt;
3913 s->_raw_size += sizeof (Elf64_External_Rela);
3914 }
3915 else
3916 {
3917 h->plt.offset = (bfd_vma) -1;
3918 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3919 }
3920 }
3921 else
3922 {
3923 h->plt.offset = (bfd_vma) -1;
3924 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3925 }
3926
3927 if (h->got.refcount > 0)
3928 {
3929 boolean dyn;
3930
3931 /* Make sure this symbol is output as a dynamic symbol.
3932 Undefined weak syms won't yet be marked as dynamic. */
3933 if (h->dynindx == -1
3934 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3935 {
3936 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
3937 return false;
3938 }
3939
3940 s = htab->sgot;
3941 h->got.offset = s->_raw_size;
3942 s->_raw_size += 8;
3943 dyn = htab->elf.dynamic_sections_created;
3944 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
3945 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
3946 }
3947 else
3948 h->got.offset = (bfd_vma) -1;
3949
3950 eh = (struct ppc_link_hash_entry *) h;
3951 if (eh->dyn_relocs == NULL)
3952 return true;
3953
3954 /* In the shared -Bsymbolic case, discard space allocated for
3955 dynamic pc-relative relocs against symbols which turn out to be
3956 defined in regular objects. For the normal shared case, discard
3957 space for relocs that have become local due to symbol visibility
3958 changes. */
3959
3960 if (info->shared)
3961 {
3962 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
3963 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
3964 || info->symbolic))
3965 {
3966 struct ppc_dyn_relocs **pp;
3967
3968 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3969 {
3970 p->count -= p->pc_count;
3971 p->pc_count = 0;
3972 if (p->count == 0)
3973 *pp = p->next;
3974 else
3975 pp = &p->next;
3976 }
3977 }
3978 }
3979 else
3980 {
3981 /* For the non-shared case, discard space for relocs against
3982 symbols which turn out to need copy relocs or are not
3983 dynamic. */
3984
3985 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3986 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3987 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3988 || (htab->elf.dynamic_sections_created
3989 && (h->root.type == bfd_link_hash_undefweak
3990 || h->root.type == bfd_link_hash_undefined))))
3991 {
3992 /* Make sure this symbol is output as a dynamic symbol.
3993 Undefined weak syms won't yet be marked as dynamic. */
3994 if (h->dynindx == -1
3995 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3996 {
3997 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
3998 return false;
3999 }
4000
4001 /* If that succeeded, we know we'll be keeping all the
4002 relocs. */
4003 if (h->dynindx != -1)
4004 goto keep;
4005 }
4006
4007 eh->dyn_relocs = NULL;
4008
4009 keep: ;
4010 }
4011
4012 /* Finally, allocate space. */
4013 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4014 {
4015 asection *sreloc = elf_section_data (p->sec)->sreloc;
4016 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
4017 }
4018
4019 return true;
4020 }
4021
4022 /* Find any dynamic relocs that apply to read-only sections. */
4023
4024 static boolean
4025 readonly_dynrelocs (h, inf)
4026 struct elf_link_hash_entry *h;
4027 PTR inf;
4028 {
4029 struct ppc_link_hash_entry *eh;
4030 struct ppc_dyn_relocs *p;
4031
4032 if (h->root.type == bfd_link_hash_warning)
4033 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4034
4035 eh = (struct ppc_link_hash_entry *) h;
4036 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4037 {
4038 asection *s = p->sec->output_section;
4039
4040 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4041 {
4042 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4043
4044 info->flags |= DF_TEXTREL;
4045
4046 /* Not an error, just cut short the traversal. */
4047 return false;
4048 }
4049 }
4050 return true;
4051 }
4052
4053 /* Set the sizes of the dynamic sections. */
4054
4055 static boolean
4056 ppc64_elf_size_dynamic_sections (output_bfd, info)
4057 bfd *output_bfd ATTRIBUTE_UNUSED;
4058 struct bfd_link_info *info;
4059 {
4060 struct ppc_link_hash_table *htab;
4061 bfd *dynobj;
4062 asection *s;
4063 boolean relocs;
4064 bfd *ibfd;
4065
4066 htab = ppc_hash_table (info);
4067 dynobj = htab->elf.dynobj;
4068 if (dynobj == NULL)
4069 abort ();
4070
4071 if (htab->elf.dynamic_sections_created)
4072 {
4073 /* Set the contents of the .interp section to the interpreter. */
4074 if (! info->shared)
4075 {
4076 s = bfd_get_section_by_name (dynobj, ".interp");
4077 if (s == NULL)
4078 abort ();
4079 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
4080 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4081 }
4082 }
4083
4084 /* Set up .got offsets for local syms, and space for local dynamic
4085 relocs. */
4086 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4087 {
4088 bfd_signed_vma *local_got;
4089 bfd_signed_vma *end_local_got;
4090 bfd_size_type locsymcount;
4091 Elf_Internal_Shdr *symtab_hdr;
4092 asection *srel;
4093
4094 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
4095 continue;
4096
4097 for (s = ibfd->sections; s != NULL; s = s->next)
4098 {
4099 struct ppc_dyn_relocs *p;
4100
4101 for (p = *((struct ppc_dyn_relocs **)
4102 &elf_section_data (s)->local_dynrel);
4103 p != NULL;
4104 p = p->next)
4105 {
4106 if (!bfd_is_abs_section (p->sec)
4107 && bfd_is_abs_section (p->sec->output_section))
4108 {
4109 /* Input section has been discarded, either because
4110 it is a copy of a linkonce section or due to
4111 linker script /DISCARD/, so we'll be discarding
4112 the relocs too. */
4113 }
4114 else if (p->count != 0)
4115 {
4116 srel = elf_section_data (p->sec)->sreloc;
4117 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
4118 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
4119 info->flags |= DF_TEXTREL;
4120 }
4121 }
4122 }
4123
4124 local_got = elf_local_got_refcounts (ibfd);
4125 if (!local_got)
4126 continue;
4127
4128 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4129 locsymcount = symtab_hdr->sh_info;
4130 end_local_got = local_got + locsymcount;
4131 s = htab->sgot;
4132 srel = htab->srelgot;
4133 for (; local_got < end_local_got; ++local_got)
4134 {
4135 if (*local_got > 0)
4136 {
4137 *local_got = s->_raw_size;
4138 s->_raw_size += 8;
4139 if (info->shared)
4140 srel->_raw_size += sizeof (Elf64_External_Rela);
4141 }
4142 else
4143 *local_got = (bfd_vma) -1;
4144 }
4145 }
4146
4147 if (!edit_opd (output_bfd, info))
4148 return false;
4149
4150 /* Allocate global sym .plt and .got entries, and space for global
4151 sym dynamic relocs. */
4152 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
4153
4154 /* We now have determined the sizes of the various dynamic sections.
4155 Allocate memory for them. */
4156 relocs = false;
4157 for (s = dynobj->sections; s != NULL; s = s->next)
4158 {
4159 if ((s->flags & SEC_LINKER_CREATED) == 0)
4160 continue;
4161
4162 if (s == htab->sbrlt || s == htab->srelbrlt)
4163 /* These haven't been allocated yet; don't strip. */
4164 continue;
4165 else if (s == htab->splt
4166 || s == htab->sgot
4167 || s == htab->sglink)
4168 {
4169 /* Strip this section if we don't need it; see the
4170 comment below. */
4171 }
4172 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4173 {
4174 if (s->_raw_size == 0)
4175 {
4176 /* If we don't need this section, strip it from the
4177 output file. This is mostly to handle .rela.bss and
4178 .rela.plt. We must create both sections in
4179 create_dynamic_sections, because they must be created
4180 before the linker maps input sections to output
4181 sections. The linker does that before
4182 adjust_dynamic_symbol is called, and it is that
4183 function which decides whether anything needs to go
4184 into these sections. */
4185 }
4186 else
4187 {
4188 if (s != htab->srelplt)
4189 relocs = true;
4190
4191 /* We use the reloc_count field as a counter if we need
4192 to copy relocs into the output file. */
4193 s->reloc_count = 0;
4194 }
4195 }
4196 else
4197 {
4198 /* It's not one of our sections, so don't allocate space. */
4199 continue;
4200 }
4201
4202 if (s->_raw_size == 0)
4203 {
4204 _bfd_strip_section_from_output (info, s);
4205 continue;
4206 }
4207
4208 /* .plt is in the bss section. We don't initialise it. */
4209 if ((s->flags & SEC_LOAD) == 0)
4210 continue;
4211
4212 /* Allocate memory for the section contents. We use bfd_zalloc
4213 here in case unused entries are not reclaimed before the
4214 section's contents are written out. This should not happen,
4215 but this way if it does, we get a R_PPC64_NONE reloc instead
4216 of garbage. */
4217 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
4218 if (s->contents == NULL)
4219 return false;
4220 }
4221
4222 if (htab->elf.dynamic_sections_created)
4223 {
4224 /* Add some entries to the .dynamic section. We fill in the
4225 values later, in ppc64_elf_finish_dynamic_sections, but we
4226 must add the entries now so that we get the correct size for
4227 the .dynamic section. The DT_DEBUG entry is filled in by the
4228 dynamic linker and used by the debugger. */
4229 #define add_dynamic_entry(TAG, VAL) \
4230 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
4231
4232 if (!info->shared)
4233 {
4234 if (!add_dynamic_entry (DT_DEBUG, 0))
4235 return false;
4236 }
4237
4238 if (htab->splt != NULL && htab->splt->_raw_size != 0)
4239 {
4240 if (!add_dynamic_entry (DT_PLTGOT, 0)
4241 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4242 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4243 || !add_dynamic_entry (DT_JMPREL, 0)
4244 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
4245 return false;
4246 }
4247
4248 if (NO_OPD_RELOCS)
4249 {
4250 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
4251 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
4252 return false;
4253 }
4254
4255 if (relocs)
4256 {
4257 if (!add_dynamic_entry (DT_RELA, 0)
4258 || !add_dynamic_entry (DT_RELASZ, 0)
4259 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
4260 return false;
4261
4262 /* If any dynamic relocs apply to a read-only section,
4263 then we need a DT_TEXTREL entry. */
4264 if ((info->flags & DF_TEXTREL) == 0)
4265 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
4266 (PTR) info);
4267
4268 if ((info->flags & DF_TEXTREL) != 0)
4269 {
4270 if (!add_dynamic_entry (DT_TEXTREL, 0))
4271 return false;
4272 }
4273 }
4274 }
4275 #undef add_dynamic_entry
4276
4277 return true;
4278 }
4279
4280 /* Determine the type of stub needed, if any, for a call. */
4281
4282 static INLINE enum ppc_stub_type
4283 ppc_type_of_stub (input_sec, rel, hash, destination)
4284 asection *input_sec;
4285 const Elf_Internal_Rela *rel;
4286 struct ppc_link_hash_entry **hash;
4287 bfd_vma destination;
4288 {
4289 struct ppc_link_hash_entry *h = *hash;
4290 bfd_vma location;
4291 bfd_vma branch_offset;
4292 bfd_vma max_branch_offset;
4293 unsigned int r_type;
4294
4295 if (h != NULL)
4296 {
4297 if (h->oh != NULL
4298 && h->oh->plt.offset != (bfd_vma) -1
4299 && h->oh->dynindx != -1)
4300 {
4301 *hash = (struct ppc_link_hash_entry *) h->oh;
4302 return ppc_stub_plt_call;
4303 }
4304
4305 if (h->elf.root.type == bfd_link_hash_undefweak
4306 || h->elf.root.type == bfd_link_hash_undefined)
4307 return ppc_stub_none;
4308 }
4309
4310 /* Determine where the call point is. */
4311 location = (input_sec->output_offset
4312 + input_sec->output_section->vma
4313 + rel->r_offset);
4314
4315 branch_offset = destination - location;
4316 r_type = ELF64_R_TYPE (rel->r_info);
4317
4318 /* Determine if a long branch stub is needed. */
4319 max_branch_offset = 1 << 25;
4320 if (r_type != (unsigned int) R_PPC64_REL24)
4321 max_branch_offset = 1 << 15;
4322
4323 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
4324 /* We need a stub. Figure out whether a long_branch or plt_branch
4325 is needed later. */
4326 return ppc_stub_long_branch;
4327
4328 return ppc_stub_none;
4329 }
4330
4331 /* Build a .plt call stub. */
4332
4333 static bfd_byte *
4334 build_plt_stub (obfd, p, offset, glink)
4335 bfd *obfd;
4336 bfd_byte *p;
4337 int offset;
4338 int glink;
4339 {
4340 #define PPC_LO(v) ((v) & 0xffff)
4341 #define PPC_HI(v) (((v) >> 16) & 0xffff)
4342 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
4343
4344 if (glink)
4345 bfd_put_32 (obfd, LD_R2_40R1, p), p += 4;
4346 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
4347 if (!glink)
4348 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
4349 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
4350 if (PPC_HA (offset + 8) != PPC_HA (offset))
4351 bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
4352 offset += 8;
4353 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
4354 if (PPC_HA (offset + 8) != PPC_HA (offset))
4355 bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
4356 offset += 8;
4357 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
4358 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
4359 bfd_put_32 (obfd, BCTR, p), p += 4;
4360 return p;
4361 }
4362
4363 static boolean
4364 ppc_build_one_stub (gen_entry, in_arg)
4365 struct bfd_hash_entry *gen_entry;
4366 PTR in_arg;
4367 {
4368 struct ppc_stub_hash_entry *stub_entry;
4369 struct ppc_branch_hash_entry *br_entry;
4370 struct bfd_link_info *info;
4371 struct ppc_link_hash_table *htab;
4372 asection *stub_sec;
4373 bfd *stub_bfd;
4374 bfd_byte *loc;
4375 bfd_byte *p;
4376 unsigned int indx;
4377 bfd_vma off;
4378 int size;
4379
4380 /* Massage our args to the form they really have. */
4381 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
4382 info = (struct bfd_link_info *) in_arg;
4383
4384 htab = ppc_hash_table (info);
4385 stub_sec = stub_entry->stub_sec;
4386
4387 /* Make a note of the offset within the stubs for this entry. */
4388 stub_entry->stub_offset = stub_sec->_cooked_size;
4389 loc = stub_sec->contents + stub_entry->stub_offset;
4390
4391 stub_bfd = stub_sec->owner;
4392
4393 switch (stub_entry->stub_type)
4394 {
4395 case ppc_stub_long_branch:
4396 /* Branches are relative. This is where we are going to. */
4397 off = (stub_entry->target_value
4398 + stub_entry->target_section->output_offset
4399 + stub_entry->target_section->output_section->vma);
4400
4401 /* And this is where we are coming from. */
4402 off -= (stub_entry->stub_offset
4403 + stub_sec->output_offset
4404 + stub_sec->output_section->vma);
4405
4406 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
4407
4408 bfd_put_32 (stub_bfd, (bfd_vma) B_DOT | (off & 0x3fffffc), loc);
4409 size = 4;
4410 break;
4411
4412 case ppc_stub_plt_branch:
4413 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
4414 stub_entry->root.string + 9,
4415 false, false);
4416 if (br_entry == NULL)
4417 {
4418 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
4419 stub_entry->root.string + 9);
4420 htab->stub_error = true;
4421 return false;
4422 }
4423
4424 off = (stub_entry->target_value
4425 + stub_entry->target_section->output_offset
4426 + stub_entry->target_section->output_section->vma);
4427
4428 bfd_put_64 (htab->sbrlt->owner, off,
4429 htab->sbrlt->contents + br_entry->offset);
4430
4431 if (info->shared)
4432 {
4433 /* Create a reloc for the branch lookup table entry. */
4434 Elf_Internal_Rela rela;
4435 Elf64_External_Rela *r;
4436
4437 rela.r_offset = (br_entry->offset
4438 + htab->sbrlt->output_offset
4439 + htab->sbrlt->output_section->vma);
4440 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
4441 rela.r_addend = off;
4442
4443 r = (Elf64_External_Rela *) htab->srelbrlt->contents;
4444 r += htab->srelbrlt->reloc_count++;
4445 bfd_elf64_swap_reloca_out (htab->srelbrlt->owner, &rela, r);
4446 }
4447
4448 off = (br_entry->offset
4449 + htab->sbrlt->output_offset
4450 + htab->sbrlt->output_section->vma
4451 - elf_gp (htab->sbrlt->output_section->owner)
4452 - TOC_BASE_OFF);
4453
4454 if (off + 0x80000000 > 0xffffffff || (off & 7) != 0)
4455 {
4456 (*_bfd_error_handler)
4457 (_("linkage table error against `%s'"),
4458 stub_entry->root.string);
4459 bfd_set_error (bfd_error_bad_value);
4460 htab->stub_error = true;
4461 return false;
4462 }
4463
4464 indx = off;
4465 bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc);
4466 bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc + 4);
4467 bfd_put_32 (stub_bfd, (bfd_vma) MTCTR_R11, loc + 8);
4468 bfd_put_32 (stub_bfd, (bfd_vma) BCTR, loc + 12);
4469 size = 16;
4470 break;
4471
4472 case ppc_stub_plt_call:
4473 /* Do the best we can for shared libraries built without
4474 exporting ".foo" for each "foo". This can happen when symbol
4475 versioning scripts strip all bar a subset of symbols. */
4476 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
4477 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
4478 {
4479 /* Point the symbol at the stub. There may be multiple stubs,
4480 we don't really care; The main thing is to make this sym
4481 defined somewhere. */
4482 stub_entry->h->oh->root.type = bfd_link_hash_defined;
4483 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
4484 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
4485 }
4486
4487 /* Now build the stub. */
4488 off = stub_entry->h->elf.plt.offset;
4489 if (off >= (bfd_vma) -2)
4490 abort ();
4491
4492 off &= ~ (bfd_vma) 1;
4493 off += (htab->splt->output_offset
4494 + htab->splt->output_section->vma
4495 - elf_gp (htab->splt->output_section->owner)
4496 - TOC_BASE_OFF);
4497
4498 if (off + 0x80000000 > 0xffffffff || (off & 7) != 0)
4499 {
4500 (*_bfd_error_handler)
4501 (_("linkage table error against `%s'"),
4502 stub_entry->h->elf.root.root.string);
4503 bfd_set_error (bfd_error_bad_value);
4504 htab->stub_error = true;
4505 return false;
4506 }
4507
4508 p = build_plt_stub (stub_bfd, loc, (int) off, 0);
4509 size = p - loc;
4510 break;
4511
4512 default:
4513 BFD_FAIL ();
4514 return false;
4515 }
4516
4517 stub_sec->_cooked_size += size;
4518 return true;
4519 }
4520
4521 /* As above, but don't actually build the stub. Just bump offset so
4522 we know stub section sizes, and select plt_branch stubs where
4523 long_branch stubs won't do. */
4524
4525 static boolean
4526 ppc_size_one_stub (gen_entry, in_arg)
4527 struct bfd_hash_entry *gen_entry;
4528 PTR in_arg;
4529 {
4530 struct ppc_stub_hash_entry *stub_entry;
4531 struct ppc_link_hash_table *htab;
4532 bfd_vma off;
4533 int size;
4534
4535 /* Massage our args to the form they really have. */
4536 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
4537 htab = (struct ppc_link_hash_table *) in_arg;
4538
4539 if (stub_entry->stub_type == ppc_stub_plt_call)
4540 {
4541 off = stub_entry->h->elf.plt.offset & ~(bfd_vma) 1;
4542 off += (htab->splt->output_offset
4543 + htab->splt->output_section->vma
4544 - elf_gp (htab->splt->output_section->owner)
4545 - TOC_BASE_OFF);
4546
4547 size = 28;
4548 if (PPC_HA ((int) off + 16) != PPC_HA ((int) off))
4549 size += 4;
4550 }
4551 else
4552 {
4553 /* ppc_stub_long_branch or ppc_stub_plt_branch. */
4554 stub_entry->stub_type = ppc_stub_long_branch;
4555 size = 4;
4556
4557 off = (stub_entry->target_value
4558 + stub_entry->target_section->output_offset
4559 + stub_entry->target_section->output_section->vma);
4560 off -= (stub_entry->stub_sec->_raw_size
4561 + stub_entry->stub_sec->output_offset
4562 + stub_entry->stub_sec->output_section->vma);
4563
4564 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
4565 {
4566 struct ppc_branch_hash_entry *br_entry;
4567
4568 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
4569 stub_entry->root.string + 9,
4570 true, false);
4571 if (br_entry == NULL)
4572 {
4573 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
4574 stub_entry->root.string + 9);
4575 htab->stub_error = true;
4576 return false;
4577 }
4578
4579 if (br_entry->iter != htab->stub_iteration)
4580 {
4581 br_entry->iter = htab->stub_iteration;
4582 br_entry->offset = htab->sbrlt->_raw_size;
4583 htab->sbrlt->_raw_size += 8;
4584 }
4585 stub_entry->stub_type = ppc_stub_plt_branch;
4586 size = 16;
4587 }
4588 }
4589
4590 stub_entry->stub_sec->_raw_size += size;
4591 return true;
4592 }
4593
4594 /* Set up various things so that we can make a list of input sections
4595 for each output section included in the link. Returns -1 on error,
4596 0 when no stubs will be needed, and 1 on success. */
4597
4598 int
4599 ppc64_elf_setup_section_lists (output_bfd, info)
4600 bfd *output_bfd;
4601 struct bfd_link_info *info;
4602 {
4603 bfd *input_bfd;
4604 int top_id, top_index;
4605 asection *section;
4606 asection **input_list, **list;
4607 bfd_size_type amt;
4608 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4609
4610 if (htab->elf.root.creator->flavour != bfd_target_elf_flavour
4611 || htab->sbrlt == NULL)
4612 return 0;
4613
4614 /* Find the top input section id. */
4615 for (input_bfd = info->input_bfds, top_id = 0;
4616 input_bfd != NULL;
4617 input_bfd = input_bfd->link_next)
4618 {
4619 for (section = input_bfd->sections;
4620 section != NULL;
4621 section = section->next)
4622 {
4623 if (top_id < section->id)
4624 top_id = section->id;
4625 }
4626 }
4627
4628 amt = sizeof (struct map_stub) * (top_id + 1);
4629 htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
4630 if (htab->stub_group == NULL)
4631 return -1;
4632
4633 /* We can't use output_bfd->section_count here to find the top output
4634 section index as some sections may have been removed, and
4635 _bfd_strip_section_from_output doesn't renumber the indices. */
4636 for (section = output_bfd->sections, top_index = 0;
4637 section != NULL;
4638 section = section->next)
4639 {
4640 if (top_index < section->index)
4641 top_index = section->index;
4642 }
4643
4644 htab->top_index = top_index;
4645 amt = sizeof (asection *) * (top_index + 1);
4646 input_list = (asection **) bfd_malloc (amt);
4647 htab->input_list = input_list;
4648 if (input_list == NULL)
4649 return -1;
4650
4651 /* For sections we aren't interested in, mark their entries with a
4652 value we can check later. */
4653 list = input_list + top_index;
4654 do
4655 *list = bfd_abs_section_ptr;
4656 while (list-- != input_list);
4657
4658 for (section = output_bfd->sections;
4659 section != NULL;
4660 section = section->next)
4661 {
4662 if ((section->flags & SEC_CODE) != 0)
4663 input_list[section->index] = NULL;
4664 }
4665
4666 return 1;
4667 }
4668
4669 /* The linker repeatedly calls this function for each input section,
4670 in the order that input sections are linked into output sections.
4671 Build lists of input sections to determine groupings between which
4672 we may insert linker stubs. */
4673
4674 void
4675 ppc64_elf_next_input_section (info, isec)
4676 struct bfd_link_info *info;
4677 asection *isec;
4678 {
4679 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4680
4681 if (isec->output_section->index <= htab->top_index)
4682 {
4683 asection **list = htab->input_list + isec->output_section->index;
4684 if (*list != bfd_abs_section_ptr)
4685 {
4686 /* Steal the link_sec pointer for our list. */
4687 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
4688 /* This happens to make the list in reverse order,
4689 which is what we want. */
4690 PREV_SEC (isec) = *list;
4691 *list = isec;
4692 }
4693 }
4694 }
4695
4696 /* See whether we can group stub sections together. Grouping stub
4697 sections may result in fewer stubs. More importantly, we need to
4698 put all .init* and .fini* stubs at the beginning of the .init or
4699 .fini output sections respectively, because glibc splits the
4700 _init and _fini functions into multiple parts. Putting a stub in
4701 the middle of a function is not a good idea. */
4702
4703 static void
4704 group_sections (htab, stub_group_size, stubs_always_before_branch)
4705 struct ppc_link_hash_table *htab;
4706 bfd_size_type stub_group_size;
4707 boolean stubs_always_before_branch;
4708 {
4709 asection **list = htab->input_list + htab->top_index;
4710 do
4711 {
4712 asection *tail = *list;
4713 if (tail == bfd_abs_section_ptr)
4714 continue;
4715 while (tail != NULL)
4716 {
4717 asection *curr;
4718 asection *prev;
4719 bfd_size_type total;
4720
4721 curr = tail;
4722 if (tail->_cooked_size)
4723 total = tail->_cooked_size;
4724 else
4725 total = tail->_raw_size;
4726 while ((prev = PREV_SEC (curr)) != NULL
4727 && ((total += curr->output_offset - prev->output_offset)
4728 < stub_group_size))
4729 curr = prev;
4730
4731 /* OK, the size from the start of CURR to the end is less
4732 than stub_group_size and thus can be handled by one stub
4733 section. (or the tail section is itself larger than
4734 stub_group_size, in which case we may be toast.) We
4735 should really be keeping track of the total size of stubs
4736 added here, as stubs contribute to the final output
4737 section size. That's a little tricky, and this way will
4738 only break if stubs added make the total size more than
4739 2^25, ie. for the default stub_group_size, if stubs total
4740 more than 2834432 bytes, or over 100000 plt call stubs. */
4741 do
4742 {
4743 prev = PREV_SEC (tail);
4744 /* Set up this stub group. */
4745 htab->stub_group[tail->id].link_sec = curr;
4746 }
4747 while (tail != curr && (tail = prev) != NULL);
4748
4749 /* But wait, there's more! Input sections up to stub_group_size
4750 bytes before the stub section can be handled by it too. */
4751 if (!stubs_always_before_branch)
4752 {
4753 total = 0;
4754 while (prev != NULL
4755 && ((total += tail->output_offset - prev->output_offset)
4756 < stub_group_size))
4757 {
4758 tail = prev;
4759 prev = PREV_SEC (tail);
4760 htab->stub_group[tail->id].link_sec = curr;
4761 }
4762 }
4763 tail = prev;
4764 }
4765 }
4766 while (list-- != htab->input_list);
4767 free (htab->input_list);
4768 #undef PREV_SEC
4769 }
4770
4771 /* Determine and set the size of the stub section for a final link.
4772
4773 The basic idea here is to examine all the relocations looking for
4774 PC-relative calls to a target that is unreachable with a "bl"
4775 instruction. */
4776
4777 boolean
4778 ppc64_elf_size_stubs (output_bfd, stub_bfd, info, group_size,
4779 add_stub_section, layout_sections_again)
4780 bfd *output_bfd;
4781 bfd *stub_bfd;
4782 struct bfd_link_info *info;
4783 bfd_signed_vma group_size;
4784 asection * (*add_stub_section) PARAMS ((const char *, asection *));
4785 void (*layout_sections_again) PARAMS ((void));
4786 {
4787 bfd_size_type stub_group_size;
4788 boolean stubs_always_before_branch;
4789 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4790
4791 /* Stash our params away. */
4792 htab->stub_bfd = stub_bfd;
4793 htab->add_stub_section = add_stub_section;
4794 htab->layout_sections_again = layout_sections_again;
4795 stubs_always_before_branch = group_size < 0;
4796 if (group_size < 0)
4797 stub_group_size = -group_size;
4798 else
4799 stub_group_size = group_size;
4800 if (stub_group_size == 1)
4801 {
4802 /* Default values. */
4803 stub_group_size = 30720000;
4804 if (htab->has_14bit_branch)
4805 stub_group_size = 30000;
4806 }
4807
4808 group_sections (htab, stub_group_size, stubs_always_before_branch);
4809
4810 while (1)
4811 {
4812 bfd *input_bfd;
4813 unsigned int bfd_indx;
4814 asection *stub_sec;
4815 boolean stub_changed;
4816
4817 htab->stub_iteration += 1;
4818 stub_changed = false;
4819
4820 for (input_bfd = info->input_bfds, bfd_indx = 0;
4821 input_bfd != NULL;
4822 input_bfd = input_bfd->link_next, bfd_indx++)
4823 {
4824 Elf_Internal_Shdr *symtab_hdr;
4825 asection *section;
4826 Elf_Internal_Sym *local_syms = NULL;
4827
4828 /* We'll need the symbol table in a second. */
4829 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4830 if (symtab_hdr->sh_info == 0)
4831 continue;
4832
4833 /* Walk over each section attached to the input bfd. */
4834 for (section = input_bfd->sections;
4835 section != NULL;
4836 section = section->next)
4837 {
4838 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4839
4840 /* If there aren't any relocs, then there's nothing more
4841 to do. */
4842 if ((section->flags & SEC_RELOC) == 0
4843 || section->reloc_count == 0)
4844 continue;
4845
4846 /* If this section is a link-once section that will be
4847 discarded, then don't create any stubs. */
4848 if (section->output_section == NULL
4849 || section->output_section->owner != output_bfd)
4850 continue;
4851
4852 /* Get the relocs. */
4853 internal_relocs
4854 = _bfd_elf64_link_read_relocs (input_bfd, section, NULL,
4855 (Elf_Internal_Rela *) NULL,
4856 info->keep_memory);
4857 if (internal_relocs == NULL)
4858 goto error_ret_free_local;
4859
4860 /* Now examine each relocation. */
4861 irela = internal_relocs;
4862 irelaend = irela + section->reloc_count;
4863 for (; irela < irelaend; irela++)
4864 {
4865 unsigned int r_type, r_indx;
4866 enum ppc_stub_type stub_type;
4867 struct ppc_stub_hash_entry *stub_entry;
4868 asection *sym_sec;
4869 bfd_vma sym_value;
4870 bfd_vma destination;
4871 struct ppc_link_hash_entry *hash;
4872 char *stub_name;
4873 const asection *id_sec;
4874
4875 r_type = ELF64_R_TYPE (irela->r_info);
4876 r_indx = ELF64_R_SYM (irela->r_info);
4877
4878 if (r_type >= (unsigned int) R_PPC_max)
4879 {
4880 bfd_set_error (bfd_error_bad_value);
4881 goto error_ret_free_internal;
4882 }
4883
4884 /* Only look for stubs on branch instructions. */
4885 if (r_type != (unsigned int) R_PPC64_REL24
4886 && r_type != (unsigned int) R_PPC64_REL14
4887 && r_type != (unsigned int) R_PPC64_REL14_BRTAKEN
4888 && r_type != (unsigned int) R_PPC64_REL14_BRNTAKEN)
4889 continue;
4890
4891 /* Now determine the call target, its name, value,
4892 section. */
4893 sym_sec = NULL;
4894 sym_value = 0;
4895 destination = 0;
4896 hash = NULL;
4897 if (r_indx < symtab_hdr->sh_info)
4898 {
4899 /* It's a local symbol. */
4900 Elf_Internal_Sym *sym;
4901 Elf_Internal_Shdr *hdr;
4902
4903 if (local_syms == NULL)
4904 {
4905 local_syms
4906 = (Elf_Internal_Sym *) symtab_hdr->contents;
4907 if (local_syms == NULL)
4908 local_syms
4909 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
4910 symtab_hdr->sh_info, 0,
4911 NULL, NULL, NULL);
4912 if (local_syms == NULL)
4913 goto error_ret_free_internal;
4914 }
4915 sym = local_syms + r_indx;
4916 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
4917 sym_sec = hdr->bfd_section;
4918 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4919 sym_value = sym->st_value;
4920 destination = (sym_value + irela->r_addend
4921 + sym_sec->output_offset
4922 + sym_sec->output_section->vma);
4923 }
4924 else
4925 {
4926 /* It's an external symbol. */
4927 int e_indx;
4928
4929 e_indx = r_indx - symtab_hdr->sh_info;
4930 hash = ((struct ppc_link_hash_entry *)
4931 elf_sym_hashes (input_bfd)[e_indx]);
4932
4933 while (hash->elf.root.type == bfd_link_hash_indirect
4934 || hash->elf.root.type == bfd_link_hash_warning)
4935 hash = ((struct ppc_link_hash_entry *)
4936 hash->elf.root.u.i.link);
4937
4938 if (hash->elf.root.type == bfd_link_hash_defined
4939 || hash->elf.root.type == bfd_link_hash_defweak)
4940 {
4941 sym_sec = hash->elf.root.u.def.section;
4942 sym_value = hash->elf.root.u.def.value;
4943 if (sym_sec->output_section != NULL)
4944 destination = (sym_value + irela->r_addend
4945 + sym_sec->output_offset
4946 + sym_sec->output_section->vma);
4947 }
4948 else if (hash->elf.root.type == bfd_link_hash_undefweak)
4949 ;
4950 else if (hash->elf.root.type == bfd_link_hash_undefined)
4951 ;
4952 else
4953 {
4954 bfd_set_error (bfd_error_bad_value);
4955 goto error_ret_free_internal;
4956 }
4957 }
4958
4959 /* Determine what (if any) linker stub is needed. */
4960 stub_type = ppc_type_of_stub (section, irela, &hash,
4961 destination);
4962 if (stub_type == ppc_stub_none)
4963 continue;
4964
4965 /* Support for grouping stub sections. */
4966 id_sec = htab->stub_group[section->id].link_sec;
4967
4968 /* Get the name of this stub. */
4969 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
4970 if (!stub_name)
4971 goto error_ret_free_internal;
4972
4973 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4974 stub_name, false, false);
4975 if (stub_entry != NULL)
4976 {
4977 /* The proper stub has already been created. */
4978 free (stub_name);
4979 continue;
4980 }
4981
4982 stub_entry = ppc_add_stub (stub_name, section, htab);
4983 if (stub_entry == NULL)
4984 {
4985 free (stub_name);
4986 error_ret_free_internal:
4987 if (elf_section_data (section)->relocs == NULL)
4988 free (internal_relocs);
4989 error_ret_free_local:
4990 if (local_syms != NULL
4991 && (symtab_hdr->contents
4992 != (unsigned char *) local_syms))
4993 free (local_syms);
4994 return false;
4995 }
4996
4997 stub_entry->target_value = sym_value;
4998 stub_entry->target_section = sym_sec;
4999 stub_entry->stub_type = stub_type;
5000 stub_entry->h = hash;
5001 stub_changed = true;
5002 }
5003
5004 /* We're done with the internal relocs, free them. */
5005 if (elf_section_data (section)->relocs != internal_relocs)
5006 free (internal_relocs);
5007 }
5008
5009 if (local_syms != NULL
5010 && symtab_hdr->contents != (unsigned char *) local_syms)
5011 {
5012 if (!info->keep_memory)
5013 free (local_syms);
5014 else
5015 symtab_hdr->contents = (unsigned char *) local_syms;
5016 }
5017 }
5018
5019 if (!stub_changed)
5020 break;
5021
5022 /* OK, we've added some stubs. Find out the new size of the
5023 stub sections. */
5024 for (stub_sec = htab->stub_bfd->sections;
5025 stub_sec != NULL;
5026 stub_sec = stub_sec->next)
5027 {
5028 stub_sec->_raw_size = 0;
5029 stub_sec->_cooked_size = 0;
5030 }
5031 htab->sbrlt->_raw_size = 0;
5032 htab->sbrlt->_cooked_size = 0;
5033
5034 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
5035
5036 /* Ask the linker to do its stuff. */
5037 (*htab->layout_sections_again) ();
5038 }
5039
5040 /* It would be nice to strip .branch_lt from the output if the
5041 section is empty, but it's too late. If we strip sections here,
5042 the dynamic symbol table is corrupted since the section symbol
5043 for the stripped section isn't written. */
5044
5045 return true;
5046 }
5047
5048 /* Called after we have determined section placement. If sections
5049 move, we'll be called again. Provide a value for TOCstart. */
5050
5051 bfd_vma
5052 ppc64_elf_toc (obfd)
5053 bfd *obfd;
5054 {
5055 asection *s;
5056 bfd_vma TOCstart;
5057
5058 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
5059 order. The TOC starts where the first of these sections starts. */
5060 s = bfd_get_section_by_name (obfd, ".got");
5061 if (s == NULL)
5062 s = bfd_get_section_by_name (obfd, ".toc");
5063 if (s == NULL)
5064 s = bfd_get_section_by_name (obfd, ".tocbss");
5065 if (s == NULL)
5066 s = bfd_get_section_by_name (obfd, ".plt");
5067 if (s == NULL)
5068 {
5069 /* This may happen for
5070 o references to TOC base (SYM@toc / TOC[tc0]) without a
5071 .toc directive
5072 o bad linker script
5073 o --gc-sections and empty TOC sections
5074
5075 FIXME: Warn user? */
5076
5077 /* Look for a likely section. We probably won't even be
5078 using TOCstart. */
5079 for (s = obfd->sections; s != NULL; s = s->next)
5080 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
5081 == (SEC_ALLOC | SEC_SMALL_DATA))
5082 break;
5083 if (s == NULL)
5084 for (s = obfd->sections; s != NULL; s = s->next)
5085 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
5086 == (SEC_ALLOC | SEC_SMALL_DATA))
5087 break;
5088 if (s == NULL)
5089 for (s = obfd->sections; s != NULL; s = s->next)
5090 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
5091 break;
5092 if (s == NULL)
5093 for (s = obfd->sections; s != NULL; s = s->next)
5094 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
5095 break;
5096 }
5097
5098 TOCstart = 0;
5099 if (s != NULL)
5100 TOCstart = s->output_section->vma + s->output_offset;
5101
5102 return TOCstart;
5103 }
5104
5105 /* Build all the stubs associated with the current output file.
5106 The stubs are kept in a hash table attached to the main linker
5107 hash table. This function is called via gldelf64ppc_finish. */
5108
5109 boolean
5110 ppc64_elf_build_stubs (info)
5111 struct bfd_link_info *info;
5112 {
5113 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5114 asection *stub_sec;
5115 bfd_vma plt_r2;
5116 bfd_byte *p;
5117
5118 for (stub_sec = htab->stub_bfd->sections;
5119 stub_sec != NULL;
5120 stub_sec = stub_sec->next)
5121 {
5122 bfd_size_type size;
5123
5124 /* Allocate memory to hold the linker stubs. */
5125 size = stub_sec->_raw_size;
5126 if (size != 0)
5127 {
5128 stub_sec->contents = (bfd_byte *) bfd_zalloc (htab->stub_bfd, size);
5129 if (stub_sec->contents == NULL)
5130 return false;
5131 }
5132 stub_sec->_cooked_size = 0;
5133 }
5134
5135 if (htab->splt != NULL)
5136 {
5137 unsigned int indx;
5138
5139 /* Build the .glink plt call stub. */
5140 plt_r2 = (htab->splt->output_offset
5141 + htab->splt->output_section->vma
5142 - elf_gp (htab->splt->output_section->owner)
5143 - TOC_BASE_OFF);
5144 p = htab->sglink->contents;
5145 p = build_plt_stub (htab->sglink->owner, p, (int) plt_r2, 1);
5146 while (p < htab->sglink->contents + GLINK_CALL_STUB_SIZE)
5147 {
5148 bfd_put_32 (htab->sglink->owner, NOP, p);
5149 p += 4;
5150 }
5151
5152 /* Build the .glink lazy link call stubs. */
5153 indx = 0;
5154 while (p < htab->sglink->contents + htab->sglink->_raw_size)
5155 {
5156 if (indx < 0x8000)
5157 {
5158 bfd_put_32 (htab->sglink->owner, LI_R0_0 | indx, p);
5159 p += 4;
5160 }
5161 else
5162 {
5163 bfd_put_32 (htab->sglink->owner, LIS_R0_0 | PPC_HI (indx), p);
5164 p += 4;
5165 bfd_put_32 (htab->sglink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
5166 p += 4;
5167 }
5168 bfd_put_32 (htab->sglink->owner,
5169 B_DOT | ((htab->sglink->contents - p) & 0x3fffffc), p);
5170 indx++;
5171 p += 4;
5172 }
5173 htab->sglink->_cooked_size = p - htab->sglink->contents;
5174 }
5175
5176 if (htab->sbrlt->_raw_size != 0)
5177 {
5178 htab->sbrlt->contents = (bfd_byte *) bfd_zalloc (htab->sbrlt->owner,
5179 htab->sbrlt->_raw_size);
5180 if (htab->sbrlt->contents == NULL)
5181 return false;
5182 }
5183
5184 /* Build the stubs as directed by the stub hash table. */
5185 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
5186
5187 for (stub_sec = htab->stub_bfd->sections;
5188 stub_sec != NULL;
5189 stub_sec = stub_sec->next)
5190 {
5191 if (stub_sec->_raw_size != stub_sec->_cooked_size)
5192 break;
5193 }
5194
5195 if (stub_sec != NULL
5196 || htab->sglink->_raw_size != htab->sglink->_cooked_size)
5197 {
5198 htab->stub_error = true;
5199 (*_bfd_error_handler) (_("stubs don't match calculated size"));
5200 }
5201
5202 return !htab->stub_error;
5203 }
5204
5205 /* The RELOCATE_SECTION function is called by the ELF backend linker
5206 to handle the relocations for a section.
5207
5208 The relocs are always passed as Rela structures; if the section
5209 actually uses Rel structures, the r_addend field will always be
5210 zero.
5211
5212 This function is responsible for adjust the section contents as
5213 necessary, and (if using Rela relocs and generating a
5214 relocateable output file) adjusting the reloc addend as
5215 necessary.
5216
5217 This function does not have to worry about setting the reloc
5218 address or the reloc symbol index.
5219
5220 LOCAL_SYMS is a pointer to the swapped in local symbols.
5221
5222 LOCAL_SECTIONS is an array giving the section in the input file
5223 corresponding to the st_shndx field of each local symbol.
5224
5225 The global hash table entry for the global symbols can be found
5226 via elf_sym_hashes (input_bfd).
5227
5228 When generating relocateable output, this function must handle
5229 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5230 going to be the section symbol corresponding to the output
5231 section, which means that the addend must be adjusted
5232 accordingly. */
5233
5234 static boolean
5235 ppc64_elf_relocate_section (output_bfd, info, input_bfd, input_section,
5236 contents, relocs, local_syms, local_sections)
5237 bfd *output_bfd;
5238 struct bfd_link_info *info;
5239 bfd *input_bfd;
5240 asection *input_section;
5241 bfd_byte *contents;
5242 Elf_Internal_Rela *relocs;
5243 Elf_Internal_Sym *local_syms;
5244 asection **local_sections;
5245 {
5246 struct ppc_link_hash_table *htab;
5247 Elf_Internal_Shdr *symtab_hdr;
5248 struct elf_link_hash_entry **sym_hashes;
5249 Elf_Internal_Rela *rel;
5250 Elf_Internal_Rela *relend;
5251 bfd_vma *local_got_offsets;
5252 bfd_vma TOCstart;
5253 boolean ret = true;
5254 boolean is_opd;
5255 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
5256 boolean is_power4 = false;
5257
5258 if (info->relocateable)
5259 return true;
5260
5261 /* Initialize howto table if needed. */
5262 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5263 ppc_howto_init ();
5264
5265 htab = ppc_hash_table (info);
5266 local_got_offsets = elf_local_got_offsets (input_bfd);
5267 TOCstart = elf_gp (output_bfd);
5268 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5269 sym_hashes = elf_sym_hashes (input_bfd);
5270 is_opd = elf_section_data (input_section)->tdata != NULL;
5271
5272 rel = relocs;
5273 relend = relocs + input_section->reloc_count;
5274 for (; rel < relend; rel++)
5275 {
5276 enum elf_ppc_reloc_type r_type;
5277 bfd_vma offset;
5278 bfd_vma addend;
5279 bfd_reloc_status_type r;
5280 Elf_Internal_Sym *sym;
5281 asection *sec;
5282 struct elf_link_hash_entry *h;
5283 struct elf_link_hash_entry *fdh;
5284 const char *sym_name;
5285 unsigned long r_symndx;
5286 bfd_vma relocation;
5287 boolean unresolved_reloc;
5288 boolean warned;
5289 long insn;
5290 struct ppc_stub_hash_entry *stub_entry;
5291 bfd_vma max_br_offset;
5292 bfd_vma from;
5293
5294 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
5295 r_symndx = ELF64_R_SYM (rel->r_info);
5296 offset = rel->r_offset;
5297 addend = rel->r_addend;
5298 r = bfd_reloc_other;
5299 sym = (Elf_Internal_Sym *) 0;
5300 sec = (asection *) 0;
5301 h = (struct elf_link_hash_entry *) 0;
5302 sym_name = (const char *) 0;
5303 unresolved_reloc = false;
5304 warned = false;
5305
5306 if (r_type == R_PPC64_TOC)
5307 {
5308 /* Relocation value is TOC base. Symbol is ignored. */
5309 relocation = TOCstart + TOC_BASE_OFF;
5310 }
5311 else if (r_symndx < symtab_hdr->sh_info)
5312 {
5313 /* It's a local symbol. */
5314 sym = local_syms + r_symndx;
5315 sec = local_sections[r_symndx];
5316 sym_name = "<local symbol>";
5317
5318 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
5319 /* rel may have changed, update our copy of addend. */
5320 addend = rel->r_addend;
5321
5322 if (elf_section_data (sec) != NULL)
5323 {
5324 long *opd_sym_adjust;
5325
5326 opd_sym_adjust = (long *) elf_section_data (sec)->tdata;
5327 if (opd_sym_adjust != NULL && sym->st_value % 24 == 0)
5328 relocation += opd_sym_adjust[sym->st_value / 24];
5329 }
5330 }
5331 else
5332 {
5333 /* It's a global symbol. */
5334 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5335 while (h->root.type == bfd_link_hash_indirect
5336 || h->root.type == bfd_link_hash_warning)
5337 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5338 sym_name = h->root.root.string;
5339 relocation = 0;
5340 if (h->root.type == bfd_link_hash_defined
5341 || h->root.type == bfd_link_hash_defweak)
5342 {
5343 sec = h->root.u.def.section;
5344 if (sec->output_section == NULL)
5345 /* Set a flag that will be cleared later if we find a
5346 relocation value for this symbol. output_section
5347 is typically NULL for symbols satisfied by a shared
5348 library. */
5349 unresolved_reloc = true;
5350 else
5351 relocation = (h->root.u.def.value
5352 + sec->output_section->vma
5353 + sec->output_offset);
5354 }
5355 else if (h->root.type == bfd_link_hash_undefweak)
5356 ;
5357 else if (info->shared
5358 && (!info->symbolic || info->allow_shlib_undefined)
5359 && !info->no_undefined
5360 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5361 ;
5362 else
5363 {
5364 if (! ((*info->callbacks->undefined_symbol)
5365 (info, h->root.root.string, input_bfd, input_section,
5366 offset, (!info->shared
5367 || info->no_undefined
5368 || ELF_ST_VISIBILITY (h->other)))))
5369 return false;
5370 warned = true;
5371 }
5372 }
5373
5374 /* First handle relocations that tweak non-addend part of insn. */
5375 insn = 0;
5376 switch (r_type)
5377 {
5378 default:
5379 break;
5380
5381 /* Branch taken prediction relocations. */
5382 case R_PPC64_ADDR14_BRTAKEN:
5383 case R_PPC64_REL14_BRTAKEN:
5384 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
5385 /* Fall thru. */
5386
5387 /* Branch not taken prediction relocations. */
5388 case R_PPC64_ADDR14_BRNTAKEN:
5389 case R_PPC64_REL14_BRNTAKEN:
5390 insn |= bfd_get_32 (output_bfd, contents + offset) & ~(0x01 << 21);
5391 if (is_power4)
5392 {
5393 /* Set 'a' bit. This is 0b00010 in BO field for branch
5394 on CR(BI) insns (BO == 001at or 011at), and 0b01000
5395 for branch on CTR insns (BO == 1a00t or 1a01t). */
5396 if ((insn & (0x14 << 21)) == (0x04 << 21))
5397 insn |= 0x02 << 21;
5398 else if ((insn & (0x14 << 21)) == (0x10 << 21))
5399 insn |= 0x08 << 21;
5400 else
5401 break;
5402 }
5403 else
5404 {
5405 from = (offset
5406 + input_section->output_offset
5407 + input_section->output_section->vma);
5408
5409 /* Invert 'y' bit if not the default. */
5410 if ((bfd_signed_vma) (relocation + addend - from) < 0)
5411 insn ^= 0x01 << 21;
5412 }
5413
5414 bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
5415 break;
5416
5417 case R_PPC64_REL24:
5418 /* A REL24 branching to a linkage function is followed by a
5419 nop. We replace the nop with a ld in order to restore
5420 the TOC base pointer. Only calls to shared objects need
5421 to alter the TOC base. These are recognized by their
5422 need for a PLT entry. */
5423 if (h != NULL
5424 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
5425 && fdh->plt.offset != (bfd_vma) -1
5426 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
5427 rel, htab)) != NULL)
5428 {
5429 boolean can_plt_call = 0;
5430
5431 if (offset + 8 <= input_section->_cooked_size)
5432 {
5433 insn = bfd_get_32 (input_bfd, contents + offset + 4);
5434 if (insn == NOP
5435 || insn == CROR_151515 || insn == CROR_313131)
5436 {
5437 bfd_put_32 (input_bfd, (bfd_vma) LD_R2_40R1,
5438 contents + offset + 4);
5439 can_plt_call = 1;
5440 }
5441 }
5442
5443 if (!can_plt_call)
5444 {
5445 /* If this is a plain branch rather than a branch
5446 and link, don't require a nop. */
5447 insn = bfd_get_32 (input_bfd, contents + offset);
5448 if ((insn & 1) == 0)
5449 can_plt_call = 1;
5450 }
5451
5452 if (can_plt_call)
5453 {
5454 relocation = (stub_entry->stub_offset
5455 + stub_entry->stub_sec->output_offset
5456 + stub_entry->stub_sec->output_section->vma);
5457 addend = 0;
5458 unresolved_reloc = false;
5459 }
5460 }
5461
5462 if (h != NULL
5463 && h->root.type == bfd_link_hash_undefweak
5464 && relocation == 0
5465 && addend == 0)
5466 {
5467 /* Tweak calls to undefined weak functions to point at a
5468 blr. We can thus call a weak function without first
5469 checking whether the function is defined. We have a
5470 blr at the end of .sfpr. */
5471 BFD_ASSERT (htab->sfpr->_raw_size != 0);
5472 relocation = (htab->sfpr->_raw_size - 4
5473 + htab->sfpr->output_offset
5474 + htab->sfpr->output_section->vma);
5475 from = (offset
5476 + input_section->output_offset
5477 + input_section->output_section->vma);
5478
5479 /* But let's not be silly about it. If the blr isn't in
5480 reach, just go to the next instruction. */
5481 if (relocation - from + (1 << 25) >= (1 << 26)
5482 || htab->sfpr->_raw_size == 0)
5483 relocation = from + 4;
5484 }
5485 break;
5486 }
5487
5488 /* Set `addend'. */
5489 switch (r_type)
5490 {
5491 default:
5492 (*_bfd_error_handler)
5493 (_("%s: unknown relocation type %d for symbol %s"),
5494 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
5495
5496 bfd_set_error (bfd_error_bad_value);
5497 ret = false;
5498 continue;
5499
5500 case R_PPC64_NONE:
5501 case R_PPC_GNU_VTINHERIT:
5502 case R_PPC_GNU_VTENTRY:
5503 continue;
5504
5505 /* GOT16 relocations. Like an ADDR16 using the symbol's
5506 address in the GOT as relocation value instead of the
5507 symbols value itself. Also, create a GOT entry for the
5508 symbol and put the symbol value there. */
5509 case R_PPC64_GOT16:
5510 case R_PPC64_GOT16_LO:
5511 case R_PPC64_GOT16_HI:
5512 case R_PPC64_GOT16_HA:
5513 case R_PPC64_GOT16_DS:
5514 case R_PPC64_GOT16_LO_DS:
5515 {
5516 /* Relocation is to the entry for this symbol in the global
5517 offset table. */
5518 bfd_vma off;
5519
5520 if (htab->sgot == NULL)
5521 abort ();
5522
5523 if (h != NULL)
5524 {
5525 boolean dyn;
5526
5527 off = h->got.offset;
5528 dyn = htab->elf.dynamic_sections_created;
5529 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
5530 || (info->shared
5531 && (info->symbolic
5532 || h->dynindx == -1
5533 || (h->elf_link_hash_flags
5534 & ELF_LINK_FORCED_LOCAL))
5535 && (h->elf_link_hash_flags
5536 & ELF_LINK_HASH_DEF_REGULAR)))
5537 {
5538 /* This is actually a static link, or it is a
5539 -Bsymbolic link and the symbol is defined
5540 locally, or the symbol was forced to be local
5541 because of a version file. We must initialize
5542 this entry in the global offset table. Since the
5543 offset must always be a multiple of 8, we use the
5544 least significant bit to record whether we have
5545 initialized it already.
5546
5547 When doing a dynamic link, we create a .rel.got
5548 relocation entry to initialize the value. This
5549 is done in the finish_dynamic_symbol routine. */
5550 if ((off & 1) != 0)
5551 off &= ~1;
5552 else
5553 {
5554 bfd_put_64 (output_bfd, relocation,
5555 htab->sgot->contents + off);
5556 h->got.offset |= 1;
5557 }
5558 }
5559 else
5560 unresolved_reloc = false;
5561 }
5562 else
5563 {
5564 if (local_got_offsets == NULL)
5565 abort ();
5566
5567 off = local_got_offsets[r_symndx];
5568
5569 /* The offset must always be a multiple of 8. We use
5570 the least significant bit to record whether we have
5571 already processed this entry. */
5572 if ((off & 1) != 0)
5573 off &= ~1;
5574 else
5575 {
5576 bfd_put_64 (output_bfd, relocation,
5577 htab->sgot->contents + off);
5578
5579 if (info->shared)
5580 {
5581 Elf_Internal_Rela outrel;
5582 Elf64_External_Rela *loc;
5583
5584 /* We need to generate a R_PPC64_RELATIVE reloc
5585 for the dynamic linker. */
5586 outrel.r_offset = (htab->sgot->output_section->vma
5587 + htab->sgot->output_offset
5588 + off);
5589 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
5590 outrel.r_addend = relocation;
5591 loc = (Elf64_External_Rela *) htab->srelgot->contents;
5592 loc += htab->srelgot->reloc_count++;
5593 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
5594 }
5595
5596 local_got_offsets[r_symndx] |= 1;
5597 }
5598 }
5599
5600 if (off >= (bfd_vma) -2)
5601 abort ();
5602
5603 relocation = htab->sgot->output_offset + off;
5604
5605 /* TOC base (r2) is TOC start plus 0x8000. */
5606 addend -= TOC_BASE_OFF;
5607 }
5608 break;
5609
5610 case R_PPC64_PLT16_HA:
5611 case R_PPC64_PLT16_HI:
5612 case R_PPC64_PLT16_LO:
5613 case R_PPC64_PLT32:
5614 case R_PPC64_PLT64:
5615 /* Relocation is to the entry for this symbol in the
5616 procedure linkage table. */
5617
5618 /* Resolve a PLT reloc against a local symbol directly,
5619 without using the procedure linkage table. */
5620 if (h == NULL)
5621 break;
5622
5623 if (h->plt.offset == (bfd_vma) -1
5624 || htab->splt == NULL)
5625 {
5626 /* We didn't make a PLT entry for this symbol. This
5627 happens when statically linking PIC code, or when
5628 using -Bsymbolic. */
5629 break;
5630 }
5631
5632 relocation = (htab->splt->output_section->vma
5633 + htab->splt->output_offset
5634 + h->plt.offset);
5635 unresolved_reloc = false;
5636 break;
5637
5638 /* TOC16 relocs. We want the offset relative to the TOC base,
5639 which is the address of the start of the TOC plus 0x8000.
5640 The TOC consists of sections .got, .toc, .tocbss, and .plt,
5641 in this order. */
5642 case R_PPC64_TOC16:
5643 case R_PPC64_TOC16_LO:
5644 case R_PPC64_TOC16_HI:
5645 case R_PPC64_TOC16_DS:
5646 case R_PPC64_TOC16_LO_DS:
5647 case R_PPC64_TOC16_HA:
5648 addend -= TOCstart + TOC_BASE_OFF;
5649 break;
5650
5651 /* Relocate against the beginning of the section. */
5652 case R_PPC64_SECTOFF:
5653 case R_PPC64_SECTOFF_LO:
5654 case R_PPC64_SECTOFF_HI:
5655 case R_PPC64_SECTOFF_DS:
5656 case R_PPC64_SECTOFF_LO_DS:
5657 case R_PPC64_SECTOFF_HA:
5658 if (sec != (asection *) 0)
5659 addend -= sec->output_section->vma;
5660 break;
5661
5662 case R_PPC64_REL14:
5663 case R_PPC64_REL14_BRNTAKEN:
5664 case R_PPC64_REL14_BRTAKEN:
5665 case R_PPC64_REL24:
5666 break;
5667
5668 /* Relocations that may need to be propagated if this is a
5669 dynamic object. */
5670 case R_PPC64_REL32:
5671 case R_PPC64_REL64:
5672 case R_PPC64_ADDR14:
5673 case R_PPC64_ADDR14_BRNTAKEN:
5674 case R_PPC64_ADDR14_BRTAKEN:
5675 case R_PPC64_ADDR16:
5676 case R_PPC64_ADDR16_DS:
5677 case R_PPC64_ADDR16_HA:
5678 case R_PPC64_ADDR16_HI:
5679 case R_PPC64_ADDR16_HIGHER:
5680 case R_PPC64_ADDR16_HIGHERA:
5681 case R_PPC64_ADDR16_HIGHEST:
5682 case R_PPC64_ADDR16_HIGHESTA:
5683 case R_PPC64_ADDR16_LO:
5684 case R_PPC64_ADDR16_LO_DS:
5685 case R_PPC64_ADDR24:
5686 case R_PPC64_ADDR30:
5687 case R_PPC64_ADDR32:
5688 case R_PPC64_ADDR64:
5689 case R_PPC64_UADDR16:
5690 case R_PPC64_UADDR32:
5691 case R_PPC64_UADDR64:
5692 /* r_symndx will be zero only for relocs against symbols
5693 from removed linkonce sections, or sections discarded by
5694 a linker script. */
5695 if (r_symndx == 0)
5696 break;
5697 /* Fall thru. */
5698
5699 case R_PPC64_TOC:
5700 if ((input_section->flags & SEC_ALLOC) == 0)
5701 break;
5702
5703 if (NO_OPD_RELOCS && is_opd)
5704 break;
5705
5706 if ((info->shared
5707 && (IS_ABSOLUTE_RELOC (r_type)
5708 || (h != NULL
5709 && h->dynindx != -1
5710 && (! info->symbolic
5711 || (h->elf_link_hash_flags
5712 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
5713 || (!info->shared
5714 && h != NULL
5715 && h->dynindx != -1
5716 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5717 && (((h->elf_link_hash_flags
5718 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5719 && (h->elf_link_hash_flags
5720 & ELF_LINK_HASH_DEF_REGULAR) == 0)
5721 || h->root.type == bfd_link_hash_undefweak
5722 || h->root.type == bfd_link_hash_undefined)))
5723 {
5724 Elf_Internal_Rela outrel;
5725 boolean skip, relocate;
5726 asection *sreloc;
5727 Elf64_External_Rela *loc;
5728
5729 /* When generating a dynamic object, these relocations
5730 are copied into the output file to be resolved at run
5731 time. */
5732
5733 skip = false;
5734 relocate = false;
5735
5736 outrel.r_offset =
5737 _bfd_elf_section_offset (output_bfd, info, input_section,
5738 rel->r_offset);
5739 if (outrel.r_offset == (bfd_vma) -1)
5740 skip = true;
5741 else if (outrel.r_offset == (bfd_vma) -2)
5742 skip = true, relocate = true;
5743 outrel.r_offset += (input_section->output_section->vma
5744 + input_section->output_offset);
5745 outrel.r_addend = addend;
5746
5747 if (skip)
5748 memset (&outrel, 0, sizeof outrel);
5749 else if (h != NULL
5750 && h->dynindx != -1
5751 && !is_opd
5752 && (!IS_ABSOLUTE_RELOC (r_type)
5753 || !info->shared
5754 || !info->symbolic
5755 || (h->elf_link_hash_flags
5756 & ELF_LINK_HASH_DEF_REGULAR) == 0))
5757 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
5758 else
5759 {
5760 /* This symbol is local, or marked to become local,
5761 or this is an opd section reloc which must point
5762 at a local function. */
5763 outrel.r_addend += relocation;
5764 relocate = true;
5765 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
5766 {
5767 if (is_opd && h != NULL)
5768 {
5769 /* Lie about opd entries. This case occurs
5770 when building shared libraries and we
5771 reference a function in another shared
5772 lib. The same thing happens for a weak
5773 definition in an application that's
5774 overridden by a strong definition in a
5775 shared lib. (I believe this is a generic
5776 bug in binutils handling of weak syms.)
5777 In these cases we won't use the opd
5778 entry in this lib. */
5779 unresolved_reloc = false;
5780 }
5781 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
5782 }
5783 else
5784 {
5785 long indx = 0;
5786
5787 if (bfd_is_abs_section (sec))
5788 ;
5789 else if (sec == NULL || sec->owner == NULL)
5790 {
5791 bfd_set_error (bfd_error_bad_value);
5792 return false;
5793 }
5794 else
5795 {
5796 asection *osec;
5797
5798 osec = sec->output_section;
5799 indx = elf_section_data (osec)->dynindx;
5800
5801 /* We are turning this relocation into one
5802 against a section symbol, so subtract out
5803 the output section's address but not the
5804 offset of the input section in the output
5805 section. */
5806 outrel.r_addend -= osec->vma;
5807 }
5808
5809 outrel.r_info = ELF64_R_INFO (indx, r_type);
5810 }
5811 }
5812
5813 sreloc = elf_section_data (input_section)->sreloc;
5814 if (sreloc == NULL)
5815 abort ();
5816
5817 loc = (Elf64_External_Rela *) sreloc->contents;
5818 loc += sreloc->reloc_count++;
5819 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
5820
5821 /* If this reloc is against an external symbol, it will
5822 be computed at runtime, so there's no need to do
5823 anything now. */
5824 if (! relocate)
5825 continue;
5826 }
5827 break;
5828
5829 case R_PPC64_COPY:
5830 case R_PPC64_GLOB_DAT:
5831 case R_PPC64_JMP_SLOT:
5832 case R_PPC64_RELATIVE:
5833 /* We shouldn't ever see these dynamic relocs in relocatable
5834 files. */
5835 /* Fall thru */
5836
5837 case R_PPC64_PLTGOT16:
5838 case R_PPC64_PLTGOT16_DS:
5839 case R_PPC64_PLTGOT16_HA:
5840 case R_PPC64_PLTGOT16_HI:
5841 case R_PPC64_PLTGOT16_LO:
5842 case R_PPC64_PLTGOT16_LO_DS:
5843 case R_PPC64_PLTREL32:
5844 case R_PPC64_PLTREL64:
5845 /* These ones haven't been implemented yet. */
5846
5847 (*_bfd_error_handler)
5848 (_("%s: Relocation %s is not supported for symbol %s."),
5849 bfd_archive_filename (input_bfd),
5850 ppc64_elf_howto_table[(int) r_type]->name, sym_name);
5851
5852 bfd_set_error (bfd_error_invalid_operation);
5853 ret = false;
5854 continue;
5855 }
5856
5857 /* Do any further special processing. */
5858 switch (r_type)
5859 {
5860 default:
5861 break;
5862
5863 case R_PPC64_ADDR16_HA:
5864 case R_PPC64_ADDR16_HIGHERA:
5865 case R_PPC64_ADDR16_HIGHESTA:
5866 case R_PPC64_PLT16_HA:
5867 case R_PPC64_TOC16_HA:
5868 case R_PPC64_SECTOFF_HA:
5869 /* It's just possible that this symbol is a weak symbol
5870 that's not actually defined anywhere. In that case,
5871 'sec' would be NULL, and we should leave the symbol
5872 alone (it will be set to zero elsewhere in the link). */
5873 if (sec != NULL)
5874 /* Add 0x10000 if sign bit in 0:15 is set. */
5875 addend += ((relocation + addend) & 0x8000) << 1;
5876 break;
5877
5878 case R_PPC64_ADDR16_DS:
5879 case R_PPC64_ADDR16_LO_DS:
5880 case R_PPC64_GOT16_DS:
5881 case R_PPC64_GOT16_LO_DS:
5882 case R_PPC64_PLT16_LO_DS:
5883 case R_PPC64_SECTOFF_DS:
5884 case R_PPC64_SECTOFF_LO_DS:
5885 case R_PPC64_TOC16_DS:
5886 case R_PPC64_TOC16_LO_DS:
5887 case R_PPC64_PLTGOT16_DS:
5888 case R_PPC64_PLTGOT16_LO_DS:
5889 if (((relocation + addend) & 3) != 0)
5890 {
5891 (*_bfd_error_handler)
5892 (_("%s: error: relocation %s not a multiple of 4"),
5893 bfd_archive_filename (input_bfd),
5894 ppc64_elf_howto_table[(int) r_type]->name);
5895 bfd_set_error (bfd_error_bad_value);
5896 ret = false;
5897 continue;
5898 }
5899 break;
5900
5901 case R_PPC64_REL14:
5902 case R_PPC64_REL14_BRNTAKEN:
5903 case R_PPC64_REL14_BRTAKEN:
5904 max_br_offset = 1 << 15;
5905 goto branch_check;
5906
5907 case R_PPC64_REL24:
5908 max_br_offset = 1 << 25;
5909
5910 branch_check:
5911 /* If the branch is out of reach, then redirect the
5912 call to the local stub for this function. */
5913 from = (offset
5914 + input_section->output_offset
5915 + input_section->output_section->vma);
5916 if (relocation + addend - from + max_br_offset >= 2 * max_br_offset
5917 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
5918 rel, htab)) != NULL)
5919 {
5920 /* Munge up the value and addend so that we call the stub
5921 rather than the procedure directly. */
5922 relocation = (stub_entry->stub_offset
5923 + stub_entry->stub_sec->output_offset
5924 + stub_entry->stub_sec->output_section->vma);
5925 addend = 0;
5926 }
5927 break;
5928 }
5929
5930 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5931 because such sections are not SEC_ALLOC and thus ld.so will
5932 not process them. */
5933 if (unresolved_reloc
5934 && !((input_section->flags & SEC_DEBUGGING) != 0
5935 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
5936 {
5937 (*_bfd_error_handler)
5938 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
5939 bfd_archive_filename (input_bfd),
5940 bfd_get_section_name (input_bfd, input_section),
5941 (long) rel->r_offset,
5942 h->root.root.string);
5943 ret = false;
5944 }
5945
5946 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
5947 input_bfd,
5948 input_section,
5949 contents,
5950 offset,
5951 relocation,
5952 addend);
5953
5954 if (r != bfd_reloc_ok)
5955 {
5956 const char *name;
5957
5958 if (h != NULL)
5959 {
5960 if (h->root.type == bfd_link_hash_undefweak
5961 && ppc64_elf_howto_table[(int) r_type]->pc_relative)
5962 {
5963 /* Assume this is a call protected by other code that
5964 detects the symbol is undefined. If this is the case,
5965 we can safely ignore the overflow. If not, the
5966 program is hosed anyway, and a little warning isn't
5967 going to help. */
5968
5969 continue;
5970 }
5971
5972 name = h->root.root.string;
5973 }
5974 else
5975 {
5976 name = bfd_elf_string_from_elf_section (input_bfd,
5977 symtab_hdr->sh_link,
5978 sym->st_name);
5979 if (name == NULL)
5980 continue;
5981 if (*name == '\0')
5982 name = bfd_section_name (input_bfd, sec);
5983 }
5984
5985 if (r == bfd_reloc_overflow)
5986 {
5987 if (warned)
5988 continue;
5989 if (!((*info->callbacks->reloc_overflow)
5990 (info, name, ppc64_elf_howto_table[(int) r_type]->name,
5991 rel->r_addend, input_bfd, input_section, offset)))
5992 return false;
5993 }
5994 else
5995 {
5996 (*_bfd_error_handler)
5997 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
5998 bfd_archive_filename (input_bfd),
5999 bfd_get_section_name (input_bfd, input_section),
6000 (long) rel->r_offset, name, (int) r);
6001 ret = false;
6002 }
6003 }
6004 }
6005
6006 return ret;
6007 }
6008
6009 /* Finish up dynamic symbol handling. We set the contents of various
6010 dynamic sections here. */
6011
6012 static boolean
6013 ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
6014 bfd *output_bfd;
6015 struct bfd_link_info *info;
6016 struct elf_link_hash_entry *h;
6017 Elf_Internal_Sym *sym;
6018 {
6019 struct ppc_link_hash_table *htab;
6020 bfd *dynobj;
6021
6022 htab = ppc_hash_table (info);
6023 dynobj = htab->elf.dynobj;
6024
6025 if (h->plt.offset != (bfd_vma) -1
6026 && ((struct ppc_link_hash_entry *) h)->is_func_descriptor)
6027 {
6028 Elf_Internal_Rela rela;
6029 Elf64_External_Rela *loc;
6030
6031 /* This symbol has an entry in the procedure linkage table. Set
6032 it up. */
6033
6034 if (htab->splt == NULL
6035 || htab->srelplt == NULL
6036 || htab->sglink == NULL)
6037 abort ();
6038
6039 /* Create a JMP_SLOT reloc to inform the dynamic linker to
6040 fill in the PLT entry. */
6041
6042 rela.r_offset = (htab->splt->output_section->vma
6043 + htab->splt->output_offset
6044 + h->plt.offset);
6045 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
6046 rela.r_addend = 0;
6047
6048 loc = (Elf64_External_Rela *) htab->srelplt->contents;
6049 loc += (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
6050 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
6051 }
6052
6053 if (h->got.offset != (bfd_vma) -1)
6054 {
6055 Elf_Internal_Rela rela;
6056 Elf64_External_Rela *loc;
6057
6058 /* This symbol has an entry in the global offset table. Set it
6059 up. */
6060
6061 if (htab->sgot == NULL || htab->srelgot == NULL)
6062 abort ();
6063
6064 rela.r_offset = (htab->sgot->output_section->vma
6065 + htab->sgot->output_offset
6066 + (h->got.offset &~ (bfd_vma) 1));
6067
6068 /* If this is a static link, or it is a -Bsymbolic link and the
6069 symbol is defined locally or was forced to be local because
6070 of a version file, we just want to emit a RELATIVE reloc.
6071 The entry in the global offset table will already have been
6072 initialized in the relocate_section function. */
6073 if (info->shared
6074 && (info->symbolic
6075 || h->dynindx == -1
6076 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
6077 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
6078 {
6079 BFD_ASSERT((h->got.offset & 1) != 0);
6080 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6081 rela.r_addend = (h->root.u.def.value
6082 + h->root.u.def.section->output_section->vma
6083 + h->root.u.def.section->output_offset);
6084 }
6085 else
6086 {
6087 BFD_ASSERT ((h->got.offset & 1) == 0);
6088 bfd_put_64 (output_bfd, (bfd_vma) 0,
6089 htab->sgot->contents + h->got.offset);
6090 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_GLOB_DAT);
6091 rela.r_addend = 0;
6092 }
6093
6094 loc = (Elf64_External_Rela *) htab->srelgot->contents;
6095 loc += htab->srelgot->reloc_count++;
6096 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
6097 }
6098
6099 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
6100 {
6101 Elf_Internal_Rela rela;
6102 Elf64_External_Rela *loc;
6103
6104 /* This symbol needs a copy reloc. Set it up. */
6105
6106 if (h->dynindx == -1
6107 || (h->root.type != bfd_link_hash_defined
6108 && h->root.type != bfd_link_hash_defweak)
6109 || htab->srelbss == NULL)
6110 abort ();
6111
6112 rela.r_offset = (h->root.u.def.value
6113 + h->root.u.def.section->output_section->vma
6114 + h->root.u.def.section->output_offset);
6115 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
6116 rela.r_addend = 0;
6117 loc = (Elf64_External_Rela *) htab->srelbss->contents;
6118 loc += htab->srelbss->reloc_count++;
6119 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
6120 }
6121
6122 /* Mark some specially defined symbols as absolute. */
6123 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
6124 sym->st_shndx = SHN_ABS;
6125
6126 return true;
6127 }
6128
6129 /* Used to decide how to sort relocs in an optimal manner for the
6130 dynamic linker, before writing them out. */
6131
6132 static enum elf_reloc_type_class
6133 ppc64_elf_reloc_type_class (rela)
6134 const Elf_Internal_Rela *rela;
6135 {
6136 enum elf_ppc_reloc_type r_type;
6137
6138 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rela->r_info);
6139 switch (r_type)
6140 {
6141 case R_PPC64_RELATIVE:
6142 return reloc_class_relative;
6143 case R_PPC64_JMP_SLOT:
6144 return reloc_class_plt;
6145 case R_PPC64_COPY:
6146 return reloc_class_copy;
6147 default:
6148 return reloc_class_normal;
6149 }
6150 }
6151
6152 /* Finish up the dynamic sections. */
6153
6154 static boolean
6155 ppc64_elf_finish_dynamic_sections (output_bfd, info)
6156 bfd *output_bfd;
6157 struct bfd_link_info *info;
6158 {
6159 struct ppc_link_hash_table *htab;
6160 bfd *dynobj;
6161 asection *sdyn;
6162
6163 htab = ppc_hash_table (info);
6164 dynobj = htab->elf.dynobj;
6165 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
6166
6167 if (htab->elf.dynamic_sections_created)
6168 {
6169 Elf64_External_Dyn *dyncon, *dynconend;
6170
6171 if (sdyn == NULL || htab->sgot == NULL)
6172 abort ();
6173
6174 dyncon = (Elf64_External_Dyn *) sdyn->contents;
6175 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
6176 for (; dyncon < dynconend; dyncon++)
6177 {
6178 Elf_Internal_Dyn dyn;
6179 asection *s;
6180
6181 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
6182
6183 switch (dyn.d_tag)
6184 {
6185 default:
6186 continue;
6187
6188 case DT_PPC64_GLINK:
6189 dyn.d_un.d_ptr = (htab->sglink->output_section->vma
6190 + htab->sglink->output_offset);
6191 break;
6192
6193 case DT_PPC64_OPD:
6194 s = bfd_get_section_by_name (output_bfd, ".opd");
6195 if (s != NULL)
6196 dyn.d_un.d_ptr = s->vma;
6197 break;
6198
6199 case DT_PPC64_OPDSZ:
6200 s = bfd_get_section_by_name (output_bfd, ".opd");
6201 if (s != NULL)
6202 dyn.d_un.d_val = s->_raw_size;
6203 break;
6204
6205 case DT_PLTGOT:
6206 dyn.d_un.d_ptr = (htab->splt->output_section->vma
6207 + htab->splt->output_offset);
6208 break;
6209
6210 case DT_JMPREL:
6211 dyn.d_un.d_ptr = (htab->srelplt->output_section->vma
6212 + htab->srelplt->output_offset);
6213 break;
6214
6215 case DT_PLTRELSZ:
6216 dyn.d_un.d_val = htab->srelplt->_raw_size;
6217 break;
6218
6219 case DT_RELASZ:
6220 /* Don't count procedure linkage table relocs in the
6221 overall reloc count. */
6222 if (htab->srelplt != NULL)
6223 dyn.d_un.d_val -= htab->srelplt->_raw_size;
6224 break;
6225 }
6226
6227 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
6228 }
6229 }
6230
6231 if (htab->sgot != NULL && htab->sgot->_raw_size != 0)
6232 {
6233 /* Fill in the first entry in the global offset table.
6234 We use it to hold the link-time TOCbase. */
6235 bfd_put_64 (output_bfd,
6236 elf_gp (output_bfd) + TOC_BASE_OFF,
6237 htab->sgot->contents);
6238
6239 /* Set .got entry size. */
6240 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8;
6241 }
6242
6243 if (htab->splt != NULL && htab->splt->_raw_size != 0)
6244 {
6245 /* Set .plt entry size. */
6246 elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize
6247 = PLT_ENTRY_SIZE;
6248 }
6249
6250 return true;
6251 }
6252
6253 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
6254 #define TARGET_LITTLE_NAME "elf64-powerpcle"
6255 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
6256 #define TARGET_BIG_NAME "elf64-powerpc"
6257 #define ELF_ARCH bfd_arch_powerpc
6258 #define ELF_MACHINE_CODE EM_PPC64
6259 #define ELF_MAXPAGESIZE 0x10000
6260 #define elf_info_to_howto ppc64_elf_info_to_howto
6261
6262 #ifdef EM_CYGNUS_POWERPC
6263 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6264 #endif
6265
6266 #ifdef EM_PPC_OLD
6267 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6268 #endif
6269
6270 #define elf_backend_want_got_sym 0
6271 #define elf_backend_want_plt_sym 0
6272 #define elf_backend_plt_alignment 3
6273 #define elf_backend_plt_not_loaded 1
6274 #define elf_backend_got_symbol_offset 0
6275 #define elf_backend_got_header_size 8
6276 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
6277 #define elf_backend_can_gc_sections 1
6278 #define elf_backend_can_refcount 1
6279 #define elf_backend_rela_normal 1
6280
6281 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
6282 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
6283 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
6284 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
6285
6286 #define elf_backend_object_p ppc64_elf_object_p
6287 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
6288 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
6289 #define elf_backend_check_relocs ppc64_elf_check_relocs
6290 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
6291 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
6292 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
6293 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
6294 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
6295 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
6296 #define elf_backend_relocate_section ppc64_elf_relocate_section
6297 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
6298 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
6299 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
6300
6301 #include "elf64-target.h"
GDB Binutils - Deliverables
This page took 0.171545 seconds and 4 git commands to generate.