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* elf.c (elf_fake_sections): Fix up .tbss sh_size and sh_type.
[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 0xff, /* 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 0xfc000003, /* 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 0xffff0003, /* 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 0xffff0003, /* 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 0xffff0003, /* 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 0xfc000003, /* 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 0xffff0003, /* 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 0xffff0003, /* 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 0xffff0003, /* 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 0x00000003, /* 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 0x0003, /* 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 0x0003, /* 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 0x0003, /* 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 0x0003, /* 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 0x0003, /* 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 0x0003, /* 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 0x0003, /* 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 0x0003, /* 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 0x0003, /* 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 0x0003, /* 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 0x0003, /* 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_link_hash_entry *, struct elf_link_hash_entry *));
1956 static boolean ppc64_elf_check_relocs
1957 PARAMS ((bfd *, struct bfd_link_info *, asection *,
1958 const Elf_Internal_Rela *));
1959 static asection * ppc64_elf_gc_mark_hook
1960 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
1961 struct elf_link_hash_entry *, Elf_Internal_Sym *));
1962 static boolean ppc64_elf_gc_sweep_hook
1963 PARAMS ((bfd *, struct bfd_link_info *, asection *,
1964 const Elf_Internal_Rela *));
1965 static boolean func_desc_adjust
1966 PARAMS ((struct elf_link_hash_entry *, PTR));
1967 static boolean ppc64_elf_func_desc_adjust
1968 PARAMS ((bfd *, struct bfd_link_info *));
1969 static boolean ppc64_elf_adjust_dynamic_symbol
1970 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
1971 static void ppc64_elf_hide_symbol
1972 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean));
1973 static boolean edit_opd
1974 PARAMS ((bfd *, struct bfd_link_info *));
1975 static boolean allocate_dynrelocs
1976 PARAMS ((struct elf_link_hash_entry *, PTR));
1977 static boolean readonly_dynrelocs
1978 PARAMS ((struct elf_link_hash_entry *, PTR));
1979 static enum elf_reloc_type_class ppc64_elf_reloc_type_class
1980 PARAMS ((const Elf_Internal_Rela *));
1981 static boolean ppc64_elf_size_dynamic_sections
1982 PARAMS ((bfd *, struct bfd_link_info *));
1983 static INLINE enum ppc_stub_type ppc_type_of_stub
1984 PARAMS ((asection *, const Elf_Internal_Rela *,
1985 struct ppc_link_hash_entry **, bfd_vma));
1986 static bfd_byte *build_plt_stub
1987 PARAMS ((bfd *, bfd_byte *, int, int));
1988 static boolean ppc_build_one_stub
1989 PARAMS ((struct bfd_hash_entry *, PTR));
1990 static boolean ppc_size_one_stub
1991 PARAMS ((struct bfd_hash_entry *, PTR));
1992 static void group_sections
1993 PARAMS ((struct ppc_link_hash_table *, bfd_size_type, boolean));
1994 static boolean ppc64_elf_relocate_section
1995 PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *,
1996 Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
1997 asection **));
1998 static boolean ppc64_elf_finish_dynamic_symbol
1999 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
2000 Elf_Internal_Sym *));
2001 static boolean ppc64_elf_finish_dynamic_sections
2002 PARAMS ((bfd *, struct bfd_link_info *));
2003
2004 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2005
2006 #define ppc_hash_table(p) \
2007 ((struct ppc_link_hash_table *) ((p)->hash))
2008
2009 #define ppc_stub_hash_lookup(table, string, create, copy) \
2010 ((struct ppc_stub_hash_entry *) \
2011 bfd_hash_lookup ((table), (string), (create), (copy)))
2012
2013 #define ppc_branch_hash_lookup(table, string, create, copy) \
2014 ((struct ppc_branch_hash_entry *) \
2015 bfd_hash_lookup ((table), (string), (create), (copy)))
2016
2017 /* Create an entry in the stub hash table. */
2018
2019 static struct bfd_hash_entry *
2020 stub_hash_newfunc (entry, table, string)
2021 struct bfd_hash_entry *entry;
2022 struct bfd_hash_table *table;
2023 const char *string;
2024 {
2025 /* Allocate the structure if it has not already been allocated by a
2026 subclass. */
2027 if (entry == NULL)
2028 {
2029 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2030 if (entry == NULL)
2031 return entry;
2032 }
2033
2034 /* Call the allocation method of the superclass. */
2035 entry = bfd_hash_newfunc (entry, table, string);
2036 if (entry != NULL)
2037 {
2038 struct ppc_stub_hash_entry *eh;
2039
2040 /* Initialize the local fields. */
2041 eh = (struct ppc_stub_hash_entry *) entry;
2042 eh->stub_sec = NULL;
2043 eh->stub_offset = 0;
2044 eh->target_value = 0;
2045 eh->target_section = NULL;
2046 eh->stub_type = ppc_stub_none;
2047 eh->h = NULL;
2048 eh->id_sec = NULL;
2049 }
2050
2051 return entry;
2052 }
2053
2054 /* Create an entry in the branch hash table. */
2055
2056 static struct bfd_hash_entry *
2057 branch_hash_newfunc (entry, table, string)
2058 struct bfd_hash_entry *entry;
2059 struct bfd_hash_table *table;
2060 const char *string;
2061 {
2062 /* Allocate the structure if it has not already been allocated by a
2063 subclass. */
2064 if (entry == NULL)
2065 {
2066 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2067 if (entry == NULL)
2068 return entry;
2069 }
2070
2071 /* Call the allocation method of the superclass. */
2072 entry = bfd_hash_newfunc (entry, table, string);
2073 if (entry != NULL)
2074 {
2075 struct ppc_branch_hash_entry *eh;
2076
2077 /* Initialize the local fields. */
2078 eh = (struct ppc_branch_hash_entry *) entry;
2079 eh->offset = 0;
2080 eh->iter = 0;
2081 }
2082
2083 return entry;
2084 }
2085
2086 /* Create an entry in a ppc64 ELF linker hash table. */
2087
2088 static struct bfd_hash_entry *
2089 link_hash_newfunc (entry, table, string)
2090 struct bfd_hash_entry *entry;
2091 struct bfd_hash_table *table;
2092 const char *string;
2093 {
2094 /* Allocate the structure if it has not already been allocated by a
2095 subclass. */
2096 if (entry == NULL)
2097 {
2098 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
2099 if (entry == NULL)
2100 return entry;
2101 }
2102
2103 /* Call the allocation method of the superclass. */
2104 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2105 if (entry != NULL)
2106 {
2107 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
2108
2109 eh->stub_cache = NULL;
2110 eh->dyn_relocs = NULL;
2111 eh->oh = NULL;
2112 eh->is_func = 0;
2113 eh->is_func_descriptor = 0;
2114 eh->is_entry = 0;
2115 }
2116
2117 return entry;
2118 }
2119
2120 /* Create a ppc64 ELF linker hash table. */
2121
2122 static struct bfd_link_hash_table *
2123 ppc64_elf_link_hash_table_create (abfd)
2124 bfd *abfd;
2125 {
2126 struct ppc_link_hash_table *htab;
2127 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
2128
2129 htab = (struct ppc_link_hash_table *) bfd_malloc (amt);
2130 if (htab == NULL)
2131 return NULL;
2132
2133 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
2134 {
2135 free (htab);
2136 return NULL;
2137 }
2138
2139 /* Init the stub hash table too. */
2140 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
2141 return NULL;
2142
2143 /* And the branch hash table. */
2144 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
2145 return NULL;
2146
2147 htab->stub_bfd = NULL;
2148 htab->add_stub_section = NULL;
2149 htab->layout_sections_again = NULL;
2150 htab->stub_group = NULL;
2151 htab->sgot = NULL;
2152 htab->srelgot = NULL;
2153 htab->splt = NULL;
2154 htab->srelplt = NULL;
2155 htab->sdynbss = NULL;
2156 htab->srelbss = NULL;
2157 htab->sglink = NULL;
2158 htab->sfpr = NULL;
2159 htab->sbrlt = NULL;
2160 htab->srelbrlt = NULL;
2161 htab->stub_error = 0;
2162 htab->has_14bit_branch = 0;
2163 htab->have_undefweak = 0;
2164 htab->stub_iteration = 0;
2165 htab->sym_sec.abfd = NULL;
2166
2167 return &htab->elf.root;
2168 }
2169
2170 /* Free the derived linker hash table. */
2171
2172 static void
2173 ppc64_elf_link_hash_table_free (hash)
2174 struct bfd_link_hash_table *hash;
2175 {
2176 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
2177
2178 bfd_hash_table_free (&ret->stub_hash_table);
2179 bfd_hash_table_free (&ret->branch_hash_table);
2180 _bfd_generic_link_hash_table_free (hash);
2181 }
2182
2183 /* Build a name for an entry in the stub hash table. */
2184
2185 static char *
2186 ppc_stub_name (input_section, sym_sec, h, rel)
2187 const asection *input_section;
2188 const asection *sym_sec;
2189 const struct ppc_link_hash_entry *h;
2190 const Elf_Internal_Rela *rel;
2191 {
2192 char *stub_name;
2193 bfd_size_type len;
2194
2195 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
2196 offsets from a sym as a branch target? In fact, we could
2197 probably assume the addend is always zero. */
2198 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
2199
2200 if (h)
2201 {
2202 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
2203 stub_name = bfd_malloc (len);
2204 if (stub_name != NULL)
2205 {
2206 sprintf (stub_name, "%08x_%s+%x",
2207 input_section->id & 0xffffffff,
2208 h->elf.root.root.string,
2209 (int) rel->r_addend & 0xffffffff);
2210 }
2211 }
2212 else
2213 {
2214 len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2215 stub_name = bfd_malloc (len);
2216 if (stub_name != NULL)
2217 {
2218 sprintf (stub_name, "%08x_%x:%x+%x",
2219 input_section->id & 0xffffffff,
2220 sym_sec->id & 0xffffffff,
2221 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
2222 (int) rel->r_addend & 0xffffffff);
2223 }
2224 }
2225 return stub_name;
2226 }
2227
2228 /* Look up an entry in the stub hash. Stub entries are cached because
2229 creating the stub name takes a bit of time. */
2230
2231 static struct ppc_stub_hash_entry *
2232 ppc_get_stub_entry (input_section, sym_sec, hash, rel, htab)
2233 const asection *input_section;
2234 const asection *sym_sec;
2235 struct elf_link_hash_entry *hash;
2236 const Elf_Internal_Rela *rel;
2237 struct ppc_link_hash_table *htab;
2238 {
2239 struct ppc_stub_hash_entry *stub_entry;
2240 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
2241 const asection *id_sec;
2242
2243 /* If this input section is part of a group of sections sharing one
2244 stub section, then use the id of the first section in the group.
2245 Stub names need to include a section id, as there may well be
2246 more than one stub used to reach say, printf, and we need to
2247 distinguish between them. */
2248 id_sec = htab->stub_group[input_section->id].link_sec;
2249
2250 if (h != NULL && h->stub_cache != NULL
2251 && h->stub_cache->h == h
2252 && h->stub_cache->id_sec == id_sec)
2253 {
2254 stub_entry = h->stub_cache;
2255 }
2256 else
2257 {
2258 char *stub_name;
2259
2260 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
2261 if (stub_name == NULL)
2262 return NULL;
2263
2264 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
2265 stub_name, false, false);
2266 if (h != NULL)
2267 h->stub_cache = stub_entry;
2268
2269 free (stub_name);
2270 }
2271
2272 return stub_entry;
2273 }
2274
2275 /* Add a new stub entry to the stub hash. Not all fields of the new
2276 stub entry are initialised. */
2277
2278 static struct ppc_stub_hash_entry *
2279 ppc_add_stub (stub_name, section, htab)
2280 const char *stub_name;
2281 asection *section;
2282 struct ppc_link_hash_table *htab;
2283 {
2284 asection *link_sec;
2285 asection *stub_sec;
2286 struct ppc_stub_hash_entry *stub_entry;
2287
2288 link_sec = htab->stub_group[section->id].link_sec;
2289 stub_sec = htab->stub_group[section->id].stub_sec;
2290 if (stub_sec == NULL)
2291 {
2292 stub_sec = htab->stub_group[link_sec->id].stub_sec;
2293 if (stub_sec == NULL)
2294 {
2295 size_t namelen;
2296 bfd_size_type len;
2297 char *s_name;
2298
2299 namelen = strlen (link_sec->name);
2300 len = namelen + sizeof (STUB_SUFFIX);
2301 s_name = bfd_alloc (htab->stub_bfd, len);
2302 if (s_name == NULL)
2303 return NULL;
2304
2305 memcpy (s_name, link_sec->name, namelen);
2306 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2307 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
2308 if (stub_sec == NULL)
2309 return NULL;
2310 htab->stub_group[link_sec->id].stub_sec = stub_sec;
2311 }
2312 htab->stub_group[section->id].stub_sec = stub_sec;
2313 }
2314
2315 /* Enter this entry into the linker stub hash table. */
2316 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2317 true, false);
2318 if (stub_entry == NULL)
2319 {
2320 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
2321 bfd_archive_filename (section->owner),
2322 stub_name);
2323 return NULL;
2324 }
2325
2326 stub_entry->stub_sec = stub_sec;
2327 stub_entry->stub_offset = 0;
2328 stub_entry->id_sec = link_sec;
2329 return stub_entry;
2330 }
2331
2332 /* Create sections for linker generated code. */
2333
2334 static boolean
2335 create_linkage_sections (dynobj, info)
2336 bfd *dynobj;
2337 struct bfd_link_info *info;
2338 {
2339 struct ppc_link_hash_table *htab;
2340 flagword flags;
2341
2342 htab = ppc_hash_table (info);
2343
2344 /* Create .sfpr for code to save and restore fp regs. */
2345 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
2346 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2347 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
2348 if (htab->sfpr == NULL
2349 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
2350 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
2351 return false;
2352
2353 /* Create .glink for lazy dynamic linking support. */
2354 htab->sglink = bfd_make_section_anyway (dynobj, ".glink");
2355 if (htab->sglink == NULL
2356 || ! bfd_set_section_flags (dynobj, htab->sglink, flags)
2357 || ! bfd_set_section_alignment (dynobj, htab->sglink, 2))
2358 return false;
2359
2360 /* Create .branch_lt for plt_branch stubs. */
2361 flags = (SEC_ALLOC | SEC_LOAD
2362 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2363 htab->sbrlt = bfd_make_section_anyway (dynobj, ".branch_lt");
2364 if (htab->sbrlt == NULL
2365 || ! bfd_set_section_flags (dynobj, htab->sbrlt, flags)
2366 || ! bfd_set_section_alignment (dynobj, htab->sbrlt, 3))
2367 return false;
2368
2369 if (info->shared)
2370 {
2371 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
2372 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2373 htab->srelbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
2374 if (!htab->srelbrlt
2375 || ! bfd_set_section_flags (dynobj, htab->srelbrlt, flags)
2376 || ! bfd_set_section_alignment (dynobj, htab->srelbrlt, 3))
2377 return false;
2378 }
2379 return true;
2380 }
2381
2382 /* Create .got and .rela.got sections in DYNOBJ, and set up
2383 shortcuts to them in our hash table. */
2384
2385 static boolean
2386 create_got_section (dynobj, info)
2387 bfd *dynobj;
2388 struct bfd_link_info *info;
2389 {
2390 struct ppc_link_hash_table *htab;
2391
2392 if (! _bfd_elf_create_got_section (dynobj, info))
2393 return false;
2394
2395 htab = ppc_hash_table (info);
2396 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
2397 if (!htab->sgot)
2398 abort ();
2399
2400 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
2401 if (!htab->srelgot
2402 || ! bfd_set_section_flags (dynobj, htab->srelgot,
2403 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2404 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2405 | SEC_READONLY))
2406 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
2407 return false;
2408 return true;
2409 }
2410
2411 /* Create the dynamic sections, and set up shortcuts. */
2412
2413 static boolean
2414 ppc64_elf_create_dynamic_sections (dynobj, info)
2415 bfd *dynobj;
2416 struct bfd_link_info *info;
2417 {
2418 struct ppc_link_hash_table *htab;
2419
2420 htab = ppc_hash_table (info);
2421 if (!htab->sgot && !create_got_section (dynobj, info))
2422 return false;
2423
2424 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2425 return false;
2426
2427 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2428 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
2429 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2430 if (!info->shared)
2431 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
2432
2433 if (!htab->splt || !htab->srelplt || !htab->sdynbss
2434 || (!info->shared && !htab->srelbss))
2435 abort ();
2436
2437 return true;
2438 }
2439
2440 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2441
2442 static void
2443 ppc64_elf_copy_indirect_symbol (dir, ind)
2444 struct elf_link_hash_entry *dir, *ind;
2445 {
2446 struct ppc_link_hash_entry *edir, *eind;
2447
2448 edir = (struct ppc_link_hash_entry *) dir;
2449 eind = (struct ppc_link_hash_entry *) ind;
2450
2451 if (eind->dyn_relocs != NULL)
2452 {
2453 if (edir->dyn_relocs != NULL)
2454 {
2455 struct ppc_dyn_relocs **pp;
2456 struct ppc_dyn_relocs *p;
2457
2458 if (ind->root.type == bfd_link_hash_indirect)
2459 abort ();
2460
2461 /* Add reloc counts against the weak sym to the strong sym
2462 list. Merge any entries against the same section. */
2463 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2464 {
2465 struct ppc_dyn_relocs *q;
2466
2467 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2468 if (q->sec == p->sec)
2469 {
2470 q->pc_count += p->pc_count;
2471 q->count += p->count;
2472 *pp = p->next;
2473 break;
2474 }
2475 if (q == NULL)
2476 pp = &p->next;
2477 }
2478 *pp = edir->dyn_relocs;
2479 }
2480
2481 edir->dyn_relocs = eind->dyn_relocs;
2482 eind->dyn_relocs = NULL;
2483 }
2484
2485 edir->is_func |= eind->is_func;
2486 edir->is_func_descriptor |= eind->is_func_descriptor;
2487 edir->is_entry |= eind->is_entry;
2488
2489 _bfd_elf_link_hash_copy_indirect (dir, ind);
2490 }
2491
2492 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
2493 symbols undefined on the command-line. */
2494
2495 boolean
2496 ppc64_elf_mark_entry_syms (info)
2497 struct bfd_link_info *info;
2498 {
2499 struct ppc_link_hash_table *htab;
2500 struct bfd_sym_chain *sym;
2501
2502 htab = ppc_hash_table (info);
2503 for (sym = info->gc_sym_list; sym; sym = sym->next)
2504 {
2505 struct elf_link_hash_entry *h;
2506
2507 h = elf_link_hash_lookup (&htab->elf, sym->name, false, false, false);
2508 if (h != NULL)
2509 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
2510 }
2511 return true;
2512 }
2513
2514 /* Look through the relocs for a section during the first phase, and
2515 calculate needed space in the global offset table, procedure
2516 linkage table, and dynamic reloc sections. */
2517
2518 static boolean
2519 ppc64_elf_check_relocs (abfd, info, sec, relocs)
2520 bfd *abfd;
2521 struct bfd_link_info *info;
2522 asection *sec;
2523 const Elf_Internal_Rela *relocs;
2524 {
2525 struct ppc_link_hash_table *htab;
2526 Elf_Internal_Shdr *symtab_hdr;
2527 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
2528 const Elf_Internal_Rela *rel;
2529 const Elf_Internal_Rela *rel_end;
2530 asection *sreloc;
2531 asection **opd_sym_map;
2532
2533 if (info->relocateable)
2534 return true;
2535
2536 htab = ppc_hash_table (info);
2537 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2538
2539 sym_hashes = elf_sym_hashes (abfd);
2540 sym_hashes_end = (sym_hashes
2541 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
2542 - symtab_hdr->sh_info);
2543
2544 sreloc = NULL;
2545 opd_sym_map = NULL;
2546 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
2547 {
2548 /* Garbage collection needs some extra help with .opd sections.
2549 We don't want to necessarily keep everything referenced by
2550 relocs in .opd, as that would keep all functions. Instead,
2551 if we reference an .opd symbol (a function descriptor), we
2552 want to keep the function code symbol's section. This is
2553 easy for global symbols, but for local syms we need to keep
2554 information about the associated function section. Later, if
2555 edit_opd deletes entries, we'll use this array to adjust
2556 local syms in .opd. */
2557 union opd_info {
2558 asection *func_section;
2559 long entry_adjust;
2560 };
2561 bfd_size_type amt;
2562
2563 amt = sec->_raw_size * sizeof (union opd_info) / 24;
2564 opd_sym_map = (asection **) bfd_zalloc (abfd, amt);
2565 if (opd_sym_map == NULL)
2566 return false;
2567 elf_section_data (sec)->tdata = opd_sym_map;
2568 }
2569
2570 if (htab->elf.dynobj == NULL)
2571 htab->elf.dynobj = abfd;
2572 if (htab->sfpr == NULL
2573 && !create_linkage_sections (htab->elf.dynobj, info))
2574 return false;
2575
2576 rel_end = relocs + sec->reloc_count;
2577 for (rel = relocs; rel < rel_end; rel++)
2578 {
2579 unsigned long r_symndx;
2580 struct elf_link_hash_entry *h;
2581 enum elf_ppc_reloc_type r_type;
2582
2583 r_symndx = ELF64_R_SYM (rel->r_info);
2584 if (r_symndx < symtab_hdr->sh_info)
2585 h = NULL;
2586 else
2587 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2588
2589 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
2590 switch (r_type)
2591 {
2592 /* GOT16 relocations */
2593 case R_PPC64_GOT16:
2594 case R_PPC64_GOT16_DS:
2595 case R_PPC64_GOT16_HA:
2596 case R_PPC64_GOT16_HI:
2597 case R_PPC64_GOT16_LO:
2598 case R_PPC64_GOT16_LO_DS:
2599
2600 /* This symbol requires a global offset table entry. */
2601 if (htab->sgot == NULL
2602 && !create_got_section (htab->elf.dynobj, info))
2603 return false;
2604
2605 if (h != NULL)
2606 {
2607 h->got.refcount += 1;
2608 }
2609 else
2610 {
2611 bfd_signed_vma *local_got_refcounts;
2612
2613 /* This is a global offset table entry for a local symbol. */
2614 local_got_refcounts = elf_local_got_refcounts (abfd);
2615 if (local_got_refcounts == NULL)
2616 {
2617 bfd_size_type size;
2618
2619 size = symtab_hdr->sh_info;
2620 size *= sizeof (bfd_signed_vma);
2621 local_got_refcounts = ((bfd_signed_vma *)
2622 bfd_zalloc (abfd, size));
2623 if (local_got_refcounts == NULL)
2624 return false;
2625 elf_local_got_refcounts (abfd) = local_got_refcounts;
2626 }
2627 local_got_refcounts[r_symndx] += 1;
2628 }
2629 break;
2630
2631 case R_PPC64_PLT16_HA:
2632 case R_PPC64_PLT16_HI:
2633 case R_PPC64_PLT16_LO:
2634 case R_PPC64_PLT32:
2635 case R_PPC64_PLT64:
2636 /* This symbol requires a procedure linkage table entry. We
2637 actually build the entry in adjust_dynamic_symbol,
2638 because this might be a case of linking PIC code without
2639 linking in any dynamic objects, in which case we don't
2640 need to generate a procedure linkage table after all. */
2641 if (h == NULL)
2642 {
2643 /* It does not make sense to have a procedure linkage
2644 table entry for a local symbol. */
2645 bfd_set_error (bfd_error_bad_value);
2646 return false;
2647 }
2648
2649 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2650 h->plt.refcount += 1;
2651 ((struct ppc_link_hash_entry *) h)->is_func = 1;
2652 break;
2653
2654 /* The following relocations don't need to propagate the
2655 relocation if linking a shared object since they are
2656 section relative. */
2657 case R_PPC64_SECTOFF:
2658 case R_PPC64_SECTOFF_LO:
2659 case R_PPC64_SECTOFF_HI:
2660 case R_PPC64_SECTOFF_HA:
2661 case R_PPC64_SECTOFF_DS:
2662 case R_PPC64_SECTOFF_LO_DS:
2663 case R_PPC64_TOC16:
2664 case R_PPC64_TOC16_LO:
2665 case R_PPC64_TOC16_HI:
2666 case R_PPC64_TOC16_HA:
2667 case R_PPC64_TOC16_DS:
2668 case R_PPC64_TOC16_LO_DS:
2669 break;
2670
2671 /* This relocation describes the C++ object vtable hierarchy.
2672 Reconstruct it for later use during GC. */
2673 case R_PPC64_GNU_VTINHERIT:
2674 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2675 return false;
2676 break;
2677
2678 /* This relocation describes which C++ vtable entries are actually
2679 used. Record for later use during GC. */
2680 case R_PPC64_GNU_VTENTRY:
2681 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2682 return false;
2683 break;
2684
2685 case R_PPC64_REL14:
2686 case R_PPC64_REL14_BRTAKEN:
2687 case R_PPC64_REL14_BRNTAKEN:
2688 htab->has_14bit_branch = 1;
2689 /* Fall through. */
2690
2691 case R_PPC64_REL24:
2692 if (h != NULL
2693 && h->root.root.string[0] == '.'
2694 && h->root.root.string[1] != 0)
2695 {
2696 /* We may need a .plt entry if the function this reloc
2697 refers to is in a shared lib. */
2698 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2699 h->plt.refcount += 1;
2700 ((struct ppc_link_hash_entry *) h)->is_func = 1;
2701 }
2702 break;
2703
2704 case R_PPC64_ADDR64:
2705 if (opd_sym_map != NULL
2706 && h != NULL
2707 && h->root.root.string[0] == '.'
2708 && h->root.root.string[1] != 0)
2709 {
2710 struct elf_link_hash_entry *fdh;
2711
2712 fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
2713 false, false, false);
2714 if (fdh != NULL)
2715 {
2716 ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
2717 ((struct ppc_link_hash_entry *) fdh)->oh = h;
2718 ((struct ppc_link_hash_entry *) h)->is_func = 1;
2719 ((struct ppc_link_hash_entry *) h)->oh = fdh;
2720 }
2721 }
2722 if (opd_sym_map != NULL
2723 && h == NULL
2724 && rel + 1 < rel_end
2725 && ((enum elf_ppc_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info)
2726 == R_PPC64_TOC))
2727 {
2728 asection *s;
2729
2730 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
2731 r_symndx);
2732 if (s == NULL)
2733 return false;
2734 else if (s != sec)
2735 opd_sym_map[rel->r_offset / 24] = s;
2736 }
2737 /* Fall through. */
2738
2739 case R_PPC64_REL64:
2740 case R_PPC64_REL32:
2741 case R_PPC64_ADDR14:
2742 case R_PPC64_ADDR14_BRNTAKEN:
2743 case R_PPC64_ADDR14_BRTAKEN:
2744 case R_PPC64_ADDR16:
2745 case R_PPC64_ADDR16_DS:
2746 case R_PPC64_ADDR16_HA:
2747 case R_PPC64_ADDR16_HI:
2748 case R_PPC64_ADDR16_HIGHER:
2749 case R_PPC64_ADDR16_HIGHERA:
2750 case R_PPC64_ADDR16_HIGHEST:
2751 case R_PPC64_ADDR16_HIGHESTA:
2752 case R_PPC64_ADDR16_LO:
2753 case R_PPC64_ADDR16_LO_DS:
2754 case R_PPC64_ADDR24:
2755 case R_PPC64_ADDR30:
2756 case R_PPC64_ADDR32:
2757 case R_PPC64_UADDR16:
2758 case R_PPC64_UADDR32:
2759 case R_PPC64_UADDR64:
2760 case R_PPC64_TOC:
2761 /* Don't propagate .opd relocs. */
2762 if (NO_OPD_RELOCS && opd_sym_map != NULL)
2763 break;
2764
2765 /* If we are creating a shared library, and this is a reloc
2766 against a global symbol, or a non PC relative reloc
2767 against a local symbol, then we need to copy the reloc
2768 into the shared library. However, if we are linking with
2769 -Bsymbolic, we do not need to copy a reloc against a
2770 global symbol which is defined in an object we are
2771 including in the link (i.e., DEF_REGULAR is set). At
2772 this point we have not seen all the input files, so it is
2773 possible that DEF_REGULAR is not set now but will be set
2774 later (it is never cleared). In case of a weak definition,
2775 DEF_REGULAR may be cleared later by a strong definition in
2776 a shared library. We account for that possibility below by
2777 storing information in the relocs_copied field of the hash
2778 table entry. A similar situation occurs when creating
2779 shared libraries and symbol visibility changes render the
2780 symbol local.
2781
2782 If on the other hand, we are creating an executable, we
2783 may need to keep relocations for symbols satisfied by a
2784 dynamic library if we manage to avoid copy relocs for the
2785 symbol. */
2786 if ((info->shared
2787 && (sec->flags & SEC_ALLOC) != 0
2788 && (IS_ABSOLUTE_RELOC (r_type)
2789 || (h != NULL
2790 && (! info->symbolic
2791 || h->root.type == bfd_link_hash_defweak
2792 || (h->elf_link_hash_flags
2793 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2794 || (!info->shared
2795 && (sec->flags & SEC_ALLOC) != 0
2796 && h != NULL
2797 && (h->root.type == bfd_link_hash_defweak
2798 || (h->elf_link_hash_flags
2799 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
2800 {
2801 struct ppc_dyn_relocs *p;
2802 struct ppc_dyn_relocs **head;
2803
2804 /* We must copy these reloc types into the output file.
2805 Create a reloc section in dynobj and make room for
2806 this reloc. */
2807 if (sreloc == NULL)
2808 {
2809 const char *name;
2810 bfd *dynobj;
2811
2812 name = (bfd_elf_string_from_elf_section
2813 (abfd,
2814 elf_elfheader (abfd)->e_shstrndx,
2815 elf_section_data (sec)->rel_hdr.sh_name));
2816 if (name == NULL)
2817 return false;
2818
2819 if (strncmp (name, ".rela", 5) != 0
2820 || strcmp (bfd_get_section_name (abfd, sec),
2821 name + 5) != 0)
2822 {
2823 (*_bfd_error_handler)
2824 (_("%s: bad relocation section name `%s\'"),
2825 bfd_archive_filename (abfd), name);
2826 bfd_set_error (bfd_error_bad_value);
2827 }
2828
2829 dynobj = htab->elf.dynobj;
2830 sreloc = bfd_get_section_by_name (dynobj, name);
2831 if (sreloc == NULL)
2832 {
2833 flagword flags;
2834
2835 sreloc = bfd_make_section (dynobj, name);
2836 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2837 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2838 if ((sec->flags & SEC_ALLOC) != 0)
2839 flags |= SEC_ALLOC | SEC_LOAD;
2840 if (sreloc == NULL
2841 || ! bfd_set_section_flags (dynobj, sreloc, flags)
2842 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
2843 return false;
2844 }
2845 elf_section_data (sec)->sreloc = sreloc;
2846 }
2847
2848 /* If this is a global symbol, we count the number of
2849 relocations we need for this symbol. */
2850 if (h != NULL)
2851 {
2852 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
2853 }
2854 else
2855 {
2856 /* Track dynamic relocs needed for local syms too.
2857 We really need local syms available to do this
2858 easily. Oh well. */
2859
2860 asection *s;
2861 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
2862 sec, r_symndx);
2863 if (s == NULL)
2864 return false;
2865
2866 head = ((struct ppc_dyn_relocs **)
2867 &elf_section_data (s)->local_dynrel);
2868 }
2869
2870 p = *head;
2871 if (p == NULL || p->sec != sec)
2872 {
2873 p = ((struct ppc_dyn_relocs *)
2874 bfd_alloc (htab->elf.dynobj,
2875 (bfd_size_type) sizeof *p));
2876 if (p == NULL)
2877 return false;
2878 p->next = *head;
2879 *head = p;
2880 p->sec = sec;
2881 p->count = 0;
2882 p->pc_count = 0;
2883 }
2884
2885 p->count += 1;
2886 if (!IS_ABSOLUTE_RELOC (r_type))
2887 p->pc_count += 1;
2888 }
2889 break;
2890
2891 default:
2892 break;
2893 }
2894 }
2895
2896 return true;
2897 }
2898
2899 /* Return the section that should be marked against GC for a given
2900 relocation. */
2901
2902 static asection *
2903 ppc64_elf_gc_mark_hook (sec, info, rel, h, sym)
2904 asection *sec;
2905 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2906 Elf_Internal_Rela *rel;
2907 struct elf_link_hash_entry *h;
2908 Elf_Internal_Sym *sym;
2909 {
2910 asection *rsec = NULL;
2911
2912 if (h != NULL)
2913 {
2914 enum elf_ppc_reloc_type r_type;
2915 struct ppc_link_hash_entry *fdh;
2916
2917 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
2918 switch (r_type)
2919 {
2920 case R_PPC64_GNU_VTINHERIT:
2921 case R_PPC64_GNU_VTENTRY:
2922 break;
2923
2924 default:
2925 switch (h->root.type)
2926 {
2927 case bfd_link_hash_defined:
2928 case bfd_link_hash_defweak:
2929 fdh = (struct ppc_link_hash_entry *) h;
2930
2931 /* Function descriptor syms cause the associated
2932 function code sym section to be marked. */
2933 if (fdh->is_func_descriptor)
2934 rsec = fdh->oh->root.u.def.section;
2935
2936 /* Function entry syms return NULL if they are in .opd
2937 and are not ._start (or others undefined on the ld
2938 command line). Thus we avoid marking all function
2939 sections, as all functions are referenced in .opd. */
2940 else if ((fdh->oh != NULL
2941 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
2942 || elf_section_data (sec)->tdata == NULL)
2943 rsec = h->root.u.def.section;
2944 break;
2945
2946 case bfd_link_hash_common:
2947 rsec = h->root.u.c.p->section;
2948 break;
2949
2950 default:
2951 break;
2952 }
2953 }
2954 }
2955 else
2956 {
2957 asection **opd_sym_section;
2958
2959 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
2960 opd_sym_section = (asection **) elf_section_data (rsec)->tdata;
2961 if (opd_sym_section != NULL)
2962 rsec = opd_sym_section[sym->st_value / 24];
2963 else if (elf_section_data (sec)->tdata != NULL)
2964 rsec = NULL;
2965 }
2966
2967 return rsec;
2968 }
2969
2970 /* Update the .got, .plt. and dynamic reloc reference counts for the
2971 section being removed. */
2972
2973 static boolean
2974 ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs)
2975 bfd *abfd;
2976 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2977 asection *sec;
2978 const Elf_Internal_Rela *relocs;
2979 {
2980 Elf_Internal_Shdr *symtab_hdr;
2981 struct elf_link_hash_entry **sym_hashes;
2982 bfd_signed_vma *local_got_refcounts;
2983 const Elf_Internal_Rela *rel, *relend;
2984
2985 elf_section_data (sec)->local_dynrel = NULL;
2986
2987 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2988 sym_hashes = elf_sym_hashes (abfd);
2989 local_got_refcounts = elf_local_got_refcounts (abfd);
2990
2991 relend = relocs + sec->reloc_count;
2992 for (rel = relocs; rel < relend; rel++)
2993 {
2994 unsigned long r_symndx;
2995 enum elf_ppc_reloc_type r_type;
2996 struct elf_link_hash_entry *h;
2997
2998 r_symndx = ELF64_R_SYM (rel->r_info);
2999 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
3000 switch (r_type)
3001 {
3002 case R_PPC64_GOT16:
3003 case R_PPC64_GOT16_DS:
3004 case R_PPC64_GOT16_HA:
3005 case R_PPC64_GOT16_HI:
3006 case R_PPC64_GOT16_LO:
3007 case R_PPC64_GOT16_LO_DS:
3008 if (r_symndx >= symtab_hdr->sh_info)
3009 {
3010 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3011 if (h->got.refcount > 0)
3012 h->got.refcount--;
3013 }
3014 else
3015 {
3016 if (local_got_refcounts[r_symndx] > 0)
3017 local_got_refcounts[r_symndx]--;
3018 }
3019 break;
3020
3021 case R_PPC64_PLT16_HA:
3022 case R_PPC64_PLT16_HI:
3023 case R_PPC64_PLT16_LO:
3024 case R_PPC64_PLT32:
3025 case R_PPC64_PLT64:
3026 if (r_symndx >= symtab_hdr->sh_info)
3027 {
3028 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3029 if (h->plt.refcount > 0)
3030 h->plt.refcount--;
3031 }
3032 break;
3033
3034 case R_PPC64_REL14:
3035 case R_PPC64_REL14_BRNTAKEN:
3036 case R_PPC64_REL14_BRTAKEN:
3037 case R_PPC64_REL24:
3038 if (r_symndx >= symtab_hdr->sh_info)
3039 {
3040 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3041 if (h->plt.refcount > 0)
3042 h->plt.refcount--;
3043 }
3044 break;
3045
3046 case R_PPC64_REL32:
3047 case R_PPC64_REL64:
3048 if (r_symndx >= symtab_hdr->sh_info)
3049 {
3050 struct ppc_link_hash_entry *eh;
3051 struct ppc_dyn_relocs **pp;
3052 struct ppc_dyn_relocs *p;
3053
3054 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3055 eh = (struct ppc_link_hash_entry *) h;
3056
3057 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3058 if (p->sec == sec)
3059 {
3060 p->pc_count -= 1;
3061 p->count -= 1;
3062 if (p->count == 0)
3063 *pp = p->next;
3064 break;
3065 }
3066 }
3067 break;
3068
3069 case R_PPC64_ADDR14:
3070 case R_PPC64_ADDR14_BRNTAKEN:
3071 case R_PPC64_ADDR14_BRTAKEN:
3072 case R_PPC64_ADDR16:
3073 case R_PPC64_ADDR16_DS:
3074 case R_PPC64_ADDR16_HA:
3075 case R_PPC64_ADDR16_HI:
3076 case R_PPC64_ADDR16_HIGHER:
3077 case R_PPC64_ADDR16_HIGHERA:
3078 case R_PPC64_ADDR16_HIGHEST:
3079 case R_PPC64_ADDR16_HIGHESTA:
3080 case R_PPC64_ADDR16_LO:
3081 case R_PPC64_ADDR16_LO_DS:
3082 case R_PPC64_ADDR24:
3083 case R_PPC64_ADDR30:
3084 case R_PPC64_ADDR32:
3085 case R_PPC64_ADDR64:
3086 case R_PPC64_UADDR16:
3087 case R_PPC64_UADDR32:
3088 case R_PPC64_UADDR64:
3089 case R_PPC64_TOC:
3090 if (r_symndx >= symtab_hdr->sh_info)
3091 {
3092 struct ppc_link_hash_entry *eh;
3093 struct ppc_dyn_relocs **pp;
3094 struct ppc_dyn_relocs *p;
3095
3096 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3097 eh = (struct ppc_link_hash_entry *) h;
3098
3099 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3100 if (p->sec == sec)
3101 {
3102 p->count -= 1;
3103 if (p->count == 0)
3104 *pp = p->next;
3105 break;
3106 }
3107 }
3108 break;
3109
3110 default:
3111 break;
3112 }
3113 }
3114 return true;
3115 }
3116
3117 /* Called via elf_link_hash_traverse to transfer dynamic linking
3118 information on function code symbol entries to their corresponding
3119 function descriptor symbol entries. */
3120 static boolean
3121 func_desc_adjust (h, inf)
3122 struct elf_link_hash_entry *h;
3123 PTR inf;
3124 {
3125 struct bfd_link_info *info;
3126 struct ppc_link_hash_table *htab;
3127
3128 if (h->root.type == bfd_link_hash_indirect)
3129 return true;
3130
3131 if (h->root.type == bfd_link_hash_warning)
3132 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3133
3134 info = (struct bfd_link_info *) inf;
3135 htab = ppc_hash_table (info);
3136
3137 /* If this is a function code symbol, transfer dynamic linking
3138 information to the function descriptor symbol. */
3139 if (!((struct ppc_link_hash_entry *) h)->is_func)
3140 return true;
3141
3142 if (h->root.type == bfd_link_hash_undefweak
3143 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
3144 htab->have_undefweak = true;
3145
3146 if (h->plt.refcount > 0
3147 && h->root.root.string[0] == '.'
3148 && h->root.root.string[1] != '\0')
3149 {
3150 struct elf_link_hash_entry *fdh = ((struct ppc_link_hash_entry *) h)->oh;
3151 boolean force_local;
3152
3153 /* Find the corresponding function descriptor symbol. Create it
3154 as undefined if necessary. */
3155
3156 if (fdh == NULL)
3157 fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
3158 false, false, true);
3159
3160 if (fdh == NULL
3161 && info->shared
3162 && (h->root.type == bfd_link_hash_undefined
3163 || h->root.type == bfd_link_hash_undefweak))
3164 {
3165 bfd *abfd;
3166 asymbol *newsym;
3167
3168 abfd = h->root.u.undef.abfd;
3169 newsym = bfd_make_empty_symbol (abfd);
3170 newsym->name = h->root.root.string + 1;
3171 newsym->section = bfd_und_section_ptr;
3172 newsym->value = 0;
3173 newsym->flags = BSF_OBJECT;
3174 if (h->root.type == bfd_link_hash_undefweak)
3175 newsym->flags |= BSF_WEAK;
3176
3177 if ( !(_bfd_generic_link_add_one_symbol
3178 (info, abfd, newsym->name, newsym->flags,
3179 newsym->section, newsym->value, NULL, false, false,
3180 (struct bfd_link_hash_entry **) &fdh)))
3181 {
3182 return false;
3183 }
3184 fdh->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
3185 }
3186
3187 if (fdh != NULL
3188 && (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
3189 && (info->shared
3190 || (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3191 || (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0))
3192 {
3193 if (fdh->dynindx == -1)
3194 if (! bfd_elf64_link_record_dynamic_symbol (info, fdh))
3195 return false;
3196 fdh->elf_link_hash_flags |= (h->elf_link_hash_flags
3197 & (ELF_LINK_HASH_REF_REGULAR
3198 | ELF_LINK_HASH_REF_DYNAMIC
3199 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
3200 | ELF_LINK_NON_GOT_REF));
3201 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3202 {
3203 fdh->plt.refcount = h->plt.refcount;
3204 fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3205 }
3206 ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
3207 ((struct ppc_link_hash_entry *) fdh)->oh = h;
3208 ((struct ppc_link_hash_entry *) h)->oh = fdh;
3209 }
3210
3211 /* Now that the info is on the function descriptor, clear the
3212 function code sym info. Any function code syms for which we
3213 don't have a definition in a regular file, we force local.
3214 This prevents a shared library from exporting syms that have
3215 been imported from another library. Function code syms that
3216 are really in the library we must leave global to prevent the
3217 linker dragging in a definition from a static library. */
3218 force_local = (info->shared
3219 && ((h->elf_link_hash_flags
3220 & ELF_LINK_HASH_DEF_REGULAR) == 0
3221 || fdh == NULL
3222 || (fdh->elf_link_hash_flags
3223 & ELF_LINK_HASH_DEF_REGULAR) == 0
3224 || (fdh->elf_link_hash_flags
3225 & ELF_LINK_FORCED_LOCAL) != 0));
3226 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
3227 }
3228
3229 return true;
3230 }
3231
3232 #define MIN_SAVE_FPR 14
3233 #define MAX_SAVE_FPR 31
3234
3235 /* Called near the start of bfd_elf_size_dynamic_sections. We use
3236 this hook to a) provide some gcc support functions, and b) transfer
3237 dynamic linking information gathered so far on function code symbol
3238 entries, to their corresponding function descriptor symbol entries. */
3239 static boolean
3240 ppc64_elf_func_desc_adjust (obfd, info)
3241 bfd *obfd ATTRIBUTE_UNUSED;
3242 struct bfd_link_info *info;
3243 {
3244 struct ppc_link_hash_table *htab;
3245 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
3246 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
3247 unsigned int i;
3248 struct elf_link_hash_entry *h;
3249 bfd_byte *p;
3250 char sym[10];
3251
3252 htab = ppc_hash_table (info);
3253
3254 if (htab->sfpr == NULL)
3255 /* We don't have any relocs. */
3256 return true;
3257
3258 /* First provide any missing ._savef* and ._restf* functions. */
3259 memcpy (sym, "._savef14", 10);
3260 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
3261 {
3262 sym[7] = i / 10 + '0';
3263 sym[8] = i % 10 + '0';
3264 h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
3265 if (h != NULL
3266 && h->root.type == bfd_link_hash_undefined)
3267 {
3268 if (lowest_savef > i)
3269 lowest_savef = i;
3270 h->root.type = bfd_link_hash_defined;
3271 h->root.u.def.section = htab->sfpr;
3272 h->root.u.def.value = (i - lowest_savef) * 4;
3273 h->type = STT_FUNC;
3274 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
3275 _bfd_elf_link_hash_hide_symbol (info, h, info->shared);
3276 }
3277 }
3278
3279 memcpy (sym, "._restf14", 10);
3280 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
3281 {
3282 sym[7] = i / 10 + '0';
3283 sym[8] = i % 10 + '0';
3284 h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
3285 if (h != NULL
3286 && h->root.type == bfd_link_hash_undefined)
3287 {
3288 if (lowest_restf > i)
3289 lowest_restf = i;
3290 h->root.type = bfd_link_hash_defined;
3291 h->root.u.def.section = htab->sfpr;
3292 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
3293 + (i - lowest_restf) * 4);
3294 h->type = STT_FUNC;
3295 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
3296 _bfd_elf_link_hash_hide_symbol (info, h, info->shared);
3297 }
3298 }
3299
3300 elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info);
3301
3302 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
3303 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
3304
3305 if (htab->sfpr->_raw_size == 0)
3306 {
3307 if (!htab->have_undefweak)
3308 {
3309 _bfd_strip_section_from_output (info, htab->sfpr);
3310 return true;
3311 }
3312
3313 htab->sfpr->_raw_size = 4;
3314 }
3315
3316 p = (bfd_byte *) bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
3317 if (p == NULL)
3318 return false;
3319 htab->sfpr->contents = p;
3320
3321 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
3322 {
3323 unsigned int fpr = i << 21;
3324 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
3325 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
3326 p += 4;
3327 }
3328 if (lowest_savef <= MAX_SAVE_FPR)
3329 {
3330 bfd_put_32 (htab->elf.dynobj, BLR, p);
3331 p += 4;
3332 }
3333
3334 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
3335 {
3336 unsigned int fpr = i << 21;
3337 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
3338 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
3339 p += 4;
3340 }
3341 if (lowest_restf <= MAX_SAVE_FPR
3342 || htab->sfpr->_raw_size == 4)
3343 {
3344 bfd_put_32 (htab->elf.dynobj, BLR, p);
3345 }
3346
3347 return true;
3348 }
3349
3350 /* Adjust a symbol defined by a dynamic object and referenced by a
3351 regular object. The current definition is in some section of the
3352 dynamic object, but we're not including those sections. We have to
3353 change the definition to something the rest of the link can
3354 understand. */
3355
3356 static boolean
3357 ppc64_elf_adjust_dynamic_symbol (info, h)
3358 struct bfd_link_info *info;
3359 struct elf_link_hash_entry *h;
3360 {
3361 struct ppc_link_hash_table *htab;
3362 struct ppc_link_hash_entry * eh;
3363 struct ppc_dyn_relocs *p;
3364 asection *s;
3365 unsigned int power_of_two;
3366
3367 htab = ppc_hash_table (info);
3368
3369 /* Deal with function syms. */
3370 if (h->type == STT_FUNC
3371 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
3372 {
3373 /* Clear procedure linkage table information for any symbol that
3374 won't need a .plt entry. */
3375 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
3376 || h->plt.refcount <= 0
3377 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
3378 || (! info->shared
3379 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
3380 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0))
3381 {
3382 h->plt.offset = (bfd_vma) -1;
3383 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3384 }
3385 return true;
3386 }
3387 else
3388 h->plt.offset = (bfd_vma) -1;
3389
3390 /* If this is a weak symbol, and there is a real definition, the
3391 processor independent code will have arranged for us to see the
3392 real definition first, and we can just use the same value. */
3393 if (h->weakdef != NULL)
3394 {
3395 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
3396 || h->weakdef->root.type == bfd_link_hash_defweak);
3397 h->root.u.def.section = h->weakdef->root.u.def.section;
3398 h->root.u.def.value = h->weakdef->root.u.def.value;
3399 return true;
3400 }
3401
3402 /* This is a reference to a symbol defined by a dynamic object which
3403 is not a function. */
3404
3405 /* If we are creating a shared library, we must presume that the
3406 only references to the symbol are via the global offset table.
3407 For such cases we need not do anything here; the relocations will
3408 be handled correctly by relocate_section. */
3409 if (info->shared)
3410 return true;
3411
3412 /* If there are no references to this symbol that do not use the
3413 GOT, we don't need to generate a copy reloc. */
3414 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
3415 return true;
3416
3417 eh = (struct ppc_link_hash_entry *) h;
3418 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3419 {
3420 s = p->sec->output_section;
3421 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3422 break;
3423 }
3424
3425 /* If we didn't find any dynamic relocs in read-only sections, then
3426 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
3427 if (p == NULL)
3428 {
3429 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
3430 return true;
3431 }
3432
3433 /* We must allocate the symbol in our .dynbss section, which will
3434 become part of the .bss section of the executable. There will be
3435 an entry for this symbol in the .dynsym section. The dynamic
3436 object will contain position independent code, so all references
3437 from the dynamic object to this symbol will go through the global
3438 offset table. The dynamic linker will use the .dynsym entry to
3439 determine the address it must put in the global offset table, so
3440 both the dynamic object and the regular object will refer to the
3441 same memory location for the variable. */
3442
3443 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
3444 copy the initial value out of the dynamic object and into the
3445 runtime process image. We need to remember the offset into the
3446 .rela.bss section we are going to use. */
3447 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3448 {
3449 htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
3450 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
3451 }
3452
3453 /* We need to figure out the alignment required for this symbol. I
3454 have no idea how ELF linkers handle this. */
3455 power_of_two = bfd_log2 (h->size);
3456 if (power_of_two > 4)
3457 power_of_two = 4;
3458
3459 /* Apply the required alignment. */
3460 s = htab->sdynbss;
3461 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
3462 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
3463 {
3464 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
3465 return false;
3466 }
3467
3468 /* Define the symbol as being at this point in the section. */
3469 h->root.u.def.section = s;
3470 h->root.u.def.value = s->_raw_size;
3471
3472 /* Increment the section size to make room for the symbol. */
3473 s->_raw_size += h->size;
3474
3475 return true;
3476 }
3477
3478 /* If given a function descriptor symbol, hide both the function code
3479 sym and the descriptor. */
3480 static void
3481 ppc64_elf_hide_symbol (info, h, force_local)
3482 struct bfd_link_info *info;
3483 struct elf_link_hash_entry *h;
3484 boolean force_local;
3485 {
3486 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
3487
3488 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
3489 {
3490 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
3491
3492 if (fh == NULL)
3493 {
3494 const char *p, *q;
3495 struct ppc_link_hash_table *htab;
3496 char save;
3497
3498 /* We aren't supposed to use alloca in BFD because on
3499 systems which do not have alloca the version in libiberty
3500 calls xmalloc, which might cause the program to crash
3501 when it runs out of memory. This function doesn't have a
3502 return status, so there's no way to gracefully return an
3503 error. So cheat. We know that string[-1] can be safely
3504 dereferenced; It's either a string in an ELF string
3505 table, or allocated in an objalloc structure. */
3506
3507 p = h->root.root.string - 1;
3508 save = *p;
3509 *(char *) p = '.';
3510 htab = ppc_hash_table (info);
3511 fh = elf_link_hash_lookup (&htab->elf, p, false, false, false);
3512 *(char *) p = save;
3513
3514 /* Unfortunately, if it so happens that the string we were
3515 looking for was allocated immediately before this string,
3516 then we overwrote the string terminator. That's the only
3517 reason the lookup should fail. */
3518 if (fh == NULL)
3519 {
3520 q = h->root.root.string + strlen (h->root.root.string);
3521 while (q >= h->root.root.string && *q == *p)
3522 --q, --p;
3523 if (q < h->root.root.string && *p == '.')
3524 fh = elf_link_hash_lookup (&htab->elf, p, false, false, false);
3525 }
3526 if (fh != NULL)
3527 {
3528 ((struct ppc_link_hash_entry *) h)->oh = fh;
3529 ((struct ppc_link_hash_entry *) fh)->oh = h;
3530 }
3531 }
3532 if (fh != NULL)
3533 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
3534 }
3535 }
3536
3537 static boolean
3538 edit_opd (obfd, info)
3539 bfd *obfd;
3540 struct bfd_link_info *info;
3541 {
3542 bfd *ibfd;
3543 unsigned int bfd_indx;
3544
3545 for (bfd_indx = 0, ibfd = info->input_bfds;
3546 ibfd != NULL;
3547 ibfd = ibfd->link_next, bfd_indx++)
3548 {
3549 asection *sec;
3550 Elf_Internal_Rela *relstart, *rel, *relend;
3551 Elf_Internal_Shdr *symtab_hdr;
3552 Elf_Internal_Sym *local_syms;
3553 struct elf_link_hash_entry **sym_hashes;
3554 bfd_vma offset;
3555 long *adjust;
3556 boolean need_edit;
3557
3558 sec = bfd_get_section_by_name (ibfd, ".opd");
3559 if (sec == NULL)
3560 continue;
3561
3562 adjust = (long *) elf_section_data (sec)->tdata;
3563 BFD_ASSERT (adjust != NULL);
3564 memset (adjust, 0, (size_t) sec->_raw_size * sizeof (long) / 24);
3565
3566 if (sec->output_section == bfd_abs_section_ptr)
3567 continue;
3568
3569 /* Look through the section relocs. */
3570 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
3571 continue;
3572
3573 local_syms = NULL;
3574 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3575 sym_hashes = elf_sym_hashes (ibfd);
3576
3577 /* Read the relocations. */
3578 relstart = _bfd_elf64_link_read_relocs (obfd, sec, (PTR) NULL,
3579 (Elf_Internal_Rela *) NULL,
3580 info->keep_memory);
3581 if (relstart == NULL)
3582 return false;
3583
3584 /* First run through the relocs to check they are sane, and to
3585 determine whether we need to edit this opd section. */
3586 need_edit = false;
3587 offset = 0;
3588 relend = relstart + sec->reloc_count;
3589 for (rel = relstart; rel < relend; rel++)
3590 {
3591 enum elf_ppc_reloc_type r_type;
3592 unsigned long r_symndx;
3593 asection *sym_sec;
3594 struct elf_link_hash_entry *h;
3595 Elf_Internal_Sym *sym;
3596
3597 /* .opd contains a regular array of 24 byte entries. We're
3598 only interested in the reloc pointing to a function entry
3599 point. */
3600 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
3601 if (r_type == R_PPC64_TOC)
3602 continue;
3603
3604 if (r_type != R_PPC64_ADDR64)
3605 {
3606 (*_bfd_error_handler)
3607 (_("%s: unexpected reloc type %u in .opd section"),
3608 bfd_archive_filename (ibfd), r_type);
3609 need_edit = false;
3610 break;
3611 }
3612
3613 if (rel + 1 >= relend)
3614 continue;
3615 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info);
3616 if (r_type != R_PPC64_TOC)
3617 continue;
3618
3619 if (rel->r_offset != offset)
3620 {
3621 /* If someone messes with .opd alignment then after a
3622 "ld -r" we might have padding in the middle of .opd.
3623 Also, there's nothing to prevent someone putting
3624 something silly in .opd with the assembler. No .opd
3625 optimization for them! */
3626 (*_bfd_error_handler)
3627 (_("%s: .opd is not a regular array of opd entries"),
3628 bfd_archive_filename (ibfd));
3629 need_edit = false;
3630 break;
3631 }
3632
3633 r_symndx = ELF64_R_SYM (rel->r_info);
3634 sym_sec = NULL;
3635 h = NULL;
3636 sym = NULL;
3637 if (r_symndx >= symtab_hdr->sh_info)
3638 {
3639 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3640 while (h->root.type == bfd_link_hash_indirect
3641 || h->root.type == bfd_link_hash_warning)
3642 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3643 if (h->root.type == bfd_link_hash_defined
3644 || h->root.type == bfd_link_hash_defweak)
3645 sym_sec = h->root.u.def.section;
3646 }
3647 else
3648 {
3649 if (local_syms == NULL)
3650 {
3651 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3652 if (local_syms == NULL)
3653 local_syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3654 symtab_hdr->sh_info, 0,
3655 NULL, NULL, NULL);
3656 if (local_syms == NULL)
3657 goto error_free_rel;
3658 }
3659 sym = local_syms + r_symndx;
3660 if ((sym->st_shndx != SHN_UNDEF
3661 && sym->st_shndx < SHN_LORESERVE)
3662 || sym->st_shndx > SHN_HIRESERVE)
3663 sym_sec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
3664 }
3665
3666 if (sym_sec == NULL || sym_sec->owner == NULL)
3667 {
3668 (*_bfd_error_handler)
3669 (_("%s: undefined sym `%s' in .opd section"),
3670 bfd_archive_filename (ibfd),
3671 h != NULL ? h->root.root.string : "<local symbol>");
3672 need_edit = false;
3673 break;
3674 }
3675
3676 if (sym_sec->output_section == bfd_abs_section_ptr)
3677 {
3678 /* OK, we've found a function that's excluded from the
3679 link. */
3680 need_edit = true;
3681 }
3682
3683 offset += 24;
3684 }
3685
3686 if (need_edit)
3687 {
3688 Elf_Internal_Rela *write_rel;
3689 bfd_byte *rptr, *wptr;
3690 boolean skip;
3691
3692 /* This seems a waste of time as input .opd sections are all
3693 zeros as generated by gcc, but I suppose there's no reason
3694 this will always be so. We might start putting something in
3695 the third word of .opd entries. */
3696 if ((sec->flags & SEC_IN_MEMORY) == 0)
3697 {
3698 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
3699 if (loc == NULL
3700 || !bfd_get_section_contents (ibfd, sec, loc, (bfd_vma) 0,
3701 sec->_raw_size))
3702 {
3703 if (local_syms != NULL
3704 && symtab_hdr->contents != (unsigned char *) local_syms)
3705 free (local_syms);
3706 error_free_rel:
3707 if (elf_section_data (sec)->relocs != relstart)
3708 free (relstart);
3709 return false;
3710 }
3711 sec->contents = loc;
3712 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
3713 }
3714
3715 elf_section_data (sec)->relocs = relstart;
3716
3717 wptr = sec->contents;
3718 rptr = sec->contents;
3719 write_rel = relstart;
3720 skip = false;
3721 offset = 0;
3722 for (rel = relstart; rel < relend; rel++)
3723 {
3724 if (rel->r_offset == offset)
3725 {
3726 unsigned long r_symndx;
3727 asection *sym_sec;
3728 struct elf_link_hash_entry *h;
3729 Elf_Internal_Sym *sym;
3730
3731 r_symndx = ELF64_R_SYM (rel->r_info);
3732 sym_sec = NULL;
3733 h = NULL;
3734 sym = NULL;
3735 if (r_symndx >= symtab_hdr->sh_info)
3736 {
3737 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3738 while (h->root.type == bfd_link_hash_indirect
3739 || h->root.type == bfd_link_hash_warning)
3740 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3741 if (h->root.type == bfd_link_hash_defined
3742 || h->root.type == bfd_link_hash_defweak)
3743 sym_sec = h->root.u.def.section;
3744 }
3745 else
3746 {
3747 sym = local_syms + r_symndx;
3748 if ((sym->st_shndx != SHN_UNDEF
3749 && sym->st_shndx < SHN_LORESERVE)
3750 || sym->st_shndx > SHN_HIRESERVE)
3751 sym_sec = bfd_section_from_elf_index (ibfd,
3752 sym->st_shndx);
3753 }
3754
3755 skip = sym_sec->output_section == bfd_abs_section_ptr;
3756 if (!skip)
3757 {
3758 /* We'll be keeping this opd entry. */
3759
3760 if (h != NULL)
3761 {
3762 /* Redefine the function descriptor symbol
3763 to this location in the opd section.
3764 We've checked above that opd relocs are
3765 ordered. */
3766 struct elf_link_hash_entry *fdh;
3767 struct ppc_link_hash_entry *fh;
3768
3769 fh = (struct ppc_link_hash_entry *) h;
3770 BFD_ASSERT (fh->is_func);
3771 fdh = fh->oh;
3772 fdh->root.u.def.value = wptr - sec->contents;
3773 }
3774 else
3775 {
3776 /* Local syms are a bit tricky. We could
3777 tweak them as they can be cached, but
3778 we'd need to look through the local syms
3779 for the function descriptor sym which we
3780 don't have at the moment. So keep an
3781 array of adjustments. */
3782 adjust[(rel->r_offset + wptr - rptr) / 24]
3783 = wptr - rptr;
3784 }
3785
3786 if (wptr != rptr)
3787 memcpy (wptr, rptr, 24);
3788 wptr += 24;
3789 }
3790 rptr += 24;
3791 offset += 24;
3792 }
3793
3794 /* We need to adjust any reloc offsets to point to the
3795 new opd entries. While we're at it, we may as well
3796 remove redundant relocs. */
3797 if (!skip)
3798 {
3799 rel->r_offset += wptr - rptr;
3800 if (write_rel != rel)
3801 memcpy (write_rel, rel, sizeof (*rel));
3802 ++write_rel;
3803 }
3804 }
3805
3806 sec->_cooked_size = wptr - sec->contents;
3807 sec->reloc_count = write_rel - relstart;
3808 }
3809 else if (elf_section_data (sec)->relocs != relstart)
3810 free (relstart);
3811
3812 if (local_syms != NULL
3813 && symtab_hdr->contents != (unsigned char *) local_syms)
3814 {
3815 if (!info->keep_memory)
3816 free (local_syms);
3817 else
3818 symtab_hdr->contents = (unsigned char *) local_syms;
3819 }
3820 }
3821
3822 return true;
3823 }
3824
3825 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
3826 will be called from elflink.h. If elflink.h doesn't call our
3827 finish_dynamic_symbol routine, we'll need to do something about
3828 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
3829 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
3830 ((DYN) \
3831 && ((INFO)->shared \
3832 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
3833 && ((H)->dynindx != -1 \
3834 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
3835
3836 /* Allocate space in .plt, .got and associated reloc sections for
3837 dynamic relocs. */
3838
3839 static boolean
3840 allocate_dynrelocs (h, inf)
3841 struct elf_link_hash_entry *h;
3842 PTR inf;
3843 {
3844 struct bfd_link_info *info;
3845 struct ppc_link_hash_table *htab;
3846 asection *s;
3847 struct ppc_link_hash_entry *eh;
3848 struct ppc_dyn_relocs *p;
3849
3850 if (h->root.type == bfd_link_hash_indirect)
3851 return true;
3852
3853 if (h->root.type == bfd_link_hash_warning)
3854 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3855
3856 info = (struct bfd_link_info *) inf;
3857 htab = ppc_hash_table (info);
3858
3859 if (htab->elf.dynamic_sections_created
3860 && h->plt.refcount > 0
3861 && h->dynindx != -1)
3862 {
3863 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
3864
3865 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
3866 {
3867 /* If this is the first .plt entry, make room for the special
3868 first entry. */
3869 s = htab->splt;
3870 if (s->_raw_size == 0)
3871 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
3872
3873 h->plt.offset = s->_raw_size;
3874
3875 /* Make room for this entry. */
3876 s->_raw_size += PLT_ENTRY_SIZE;
3877
3878 /* Make room for the .glink code. */
3879 s = htab->sglink;
3880 if (s->_raw_size == 0)
3881 s->_raw_size += GLINK_CALL_STUB_SIZE;
3882 /* We need bigger stubs past index 32767. */
3883 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
3884 s->_raw_size += 4;
3885 s->_raw_size += 2*4;
3886
3887 /* We also need to make an entry in the .rela.plt section. */
3888 s = htab->srelplt;
3889 s->_raw_size += sizeof (Elf64_External_Rela);
3890 }
3891 else
3892 {
3893 h->plt.offset = (bfd_vma) -1;
3894 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3895 }
3896 }
3897 else
3898 {
3899 h->plt.offset = (bfd_vma) -1;
3900 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3901 }
3902
3903 if (h->got.refcount > 0)
3904 {
3905 boolean dyn;
3906
3907 /* Make sure this symbol is output as a dynamic symbol.
3908 Undefined weak syms won't yet be marked as dynamic. */
3909 if (h->dynindx == -1
3910 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3911 {
3912 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
3913 return false;
3914 }
3915
3916 s = htab->sgot;
3917 h->got.offset = s->_raw_size;
3918 s->_raw_size += 8;
3919 dyn = htab->elf.dynamic_sections_created;
3920 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
3921 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
3922 }
3923 else
3924 h->got.offset = (bfd_vma) -1;
3925
3926 eh = (struct ppc_link_hash_entry *) h;
3927 if (eh->dyn_relocs == NULL)
3928 return true;
3929
3930 /* In the shared -Bsymbolic case, discard space allocated for
3931 dynamic pc-relative relocs against symbols which turn out to be
3932 defined in regular objects. For the normal shared case, discard
3933 space for relocs that have become local due to symbol visibility
3934 changes. */
3935
3936 if (info->shared)
3937 {
3938 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
3939 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
3940 || info->symbolic))
3941 {
3942 struct ppc_dyn_relocs **pp;
3943
3944 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3945 {
3946 p->count -= p->pc_count;
3947 p->pc_count = 0;
3948 if (p->count == 0)
3949 *pp = p->next;
3950 else
3951 pp = &p->next;
3952 }
3953 }
3954 }
3955 else
3956 {
3957 /* For the non-shared case, discard space for relocs against
3958 symbols which turn out to need copy relocs or are not
3959 dynamic. */
3960
3961 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3962 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3963 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3964 || (htab->elf.dynamic_sections_created
3965 && (h->root.type == bfd_link_hash_undefweak
3966 || h->root.type == bfd_link_hash_undefined))))
3967 {
3968 /* Make sure this symbol is output as a dynamic symbol.
3969 Undefined weak syms won't yet be marked as dynamic. */
3970 if (h->dynindx == -1
3971 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3972 {
3973 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
3974 return false;
3975 }
3976
3977 /* If that succeeded, we know we'll be keeping all the
3978 relocs. */
3979 if (h->dynindx != -1)
3980 goto keep;
3981 }
3982
3983 eh->dyn_relocs = NULL;
3984
3985 keep: ;
3986 }
3987
3988 /* Finally, allocate space. */
3989 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3990 {
3991 asection *sreloc = elf_section_data (p->sec)->sreloc;
3992 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
3993 }
3994
3995 return true;
3996 }
3997
3998 /* Find any dynamic relocs that apply to read-only sections. */
3999
4000 static boolean
4001 readonly_dynrelocs (h, inf)
4002 struct elf_link_hash_entry *h;
4003 PTR inf;
4004 {
4005 struct ppc_link_hash_entry *eh;
4006 struct ppc_dyn_relocs *p;
4007
4008 if (h->root.type == bfd_link_hash_warning)
4009 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4010
4011 eh = (struct ppc_link_hash_entry *) h;
4012 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4013 {
4014 asection *s = p->sec->output_section;
4015
4016 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4017 {
4018 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4019
4020 info->flags |= DF_TEXTREL;
4021
4022 /* Not an error, just cut short the traversal. */
4023 return false;
4024 }
4025 }
4026 return true;
4027 }
4028
4029 /* Set the sizes of the dynamic sections. */
4030
4031 static boolean
4032 ppc64_elf_size_dynamic_sections (output_bfd, info)
4033 bfd *output_bfd ATTRIBUTE_UNUSED;
4034 struct bfd_link_info *info;
4035 {
4036 struct ppc_link_hash_table *htab;
4037 bfd *dynobj;
4038 asection *s;
4039 boolean relocs;
4040 bfd *ibfd;
4041
4042 htab = ppc_hash_table (info);
4043 dynobj = htab->elf.dynobj;
4044 if (dynobj == NULL)
4045 abort ();
4046
4047 if (htab->elf.dynamic_sections_created)
4048 {
4049 /* Set the contents of the .interp section to the interpreter. */
4050 if (! info->shared)
4051 {
4052 s = bfd_get_section_by_name (dynobj, ".interp");
4053 if (s == NULL)
4054 abort ();
4055 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
4056 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4057 }
4058 }
4059
4060 /* Set up .got offsets for local syms, and space for local dynamic
4061 relocs. */
4062 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4063 {
4064 bfd_signed_vma *local_got;
4065 bfd_signed_vma *end_local_got;
4066 bfd_size_type locsymcount;
4067 Elf_Internal_Shdr *symtab_hdr;
4068 asection *srel;
4069
4070 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
4071 continue;
4072
4073 for (s = ibfd->sections; s != NULL; s = s->next)
4074 {
4075 struct ppc_dyn_relocs *p;
4076
4077 for (p = *((struct ppc_dyn_relocs **)
4078 &elf_section_data (s)->local_dynrel);
4079 p != NULL;
4080 p = p->next)
4081 {
4082 if (!bfd_is_abs_section (p->sec)
4083 && bfd_is_abs_section (p->sec->output_section))
4084 {
4085 /* Input section has been discarded, either because
4086 it is a copy of a linkonce section or due to
4087 linker script /DISCARD/, so we'll be discarding
4088 the relocs too. */
4089 }
4090 else if (p->count != 0)
4091 {
4092 srel = elf_section_data (p->sec)->sreloc;
4093 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
4094 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
4095 info->flags |= DF_TEXTREL;
4096 }
4097 }
4098 }
4099
4100 local_got = elf_local_got_refcounts (ibfd);
4101 if (!local_got)
4102 continue;
4103
4104 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4105 locsymcount = symtab_hdr->sh_info;
4106 end_local_got = local_got + locsymcount;
4107 s = htab->sgot;
4108 srel = htab->srelgot;
4109 for (; local_got < end_local_got; ++local_got)
4110 {
4111 if (*local_got > 0)
4112 {
4113 *local_got = s->_raw_size;
4114 s->_raw_size += 8;
4115 if (info->shared)
4116 srel->_raw_size += sizeof (Elf64_External_Rela);
4117 }
4118 else
4119 *local_got = (bfd_vma) -1;
4120 }
4121 }
4122
4123 if (!edit_opd (output_bfd, info))
4124 return false;
4125
4126 /* Allocate global sym .plt and .got entries, and space for global
4127 sym dynamic relocs. */
4128 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
4129
4130 /* We now have determined the sizes of the various dynamic sections.
4131 Allocate memory for them. */
4132 relocs = false;
4133 for (s = dynobj->sections; s != NULL; s = s->next)
4134 {
4135 if ((s->flags & SEC_LINKER_CREATED) == 0)
4136 continue;
4137
4138 if (s == htab->sbrlt || s == htab->srelbrlt)
4139 /* These haven't been allocated yet; don't strip. */
4140 continue;
4141 else if (s == htab->splt
4142 || s == htab->sgot
4143 || s == htab->sglink)
4144 {
4145 /* Strip this section if we don't need it; see the
4146 comment below. */
4147 }
4148 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4149 {
4150 if (s->_raw_size == 0)
4151 {
4152 /* If we don't need this section, strip it from the
4153 output file. This is mostly to handle .rela.bss and
4154 .rela.plt. We must create both sections in
4155 create_dynamic_sections, because they must be created
4156 before the linker maps input sections to output
4157 sections. The linker does that before
4158 adjust_dynamic_symbol is called, and it is that
4159 function which decides whether anything needs to go
4160 into these sections. */
4161 }
4162 else
4163 {
4164 if (s != htab->srelplt)
4165 relocs = true;
4166
4167 /* We use the reloc_count field as a counter if we need
4168 to copy relocs into the output file. */
4169 s->reloc_count = 0;
4170 }
4171 }
4172 else
4173 {
4174 /* It's not one of our sections, so don't allocate space. */
4175 continue;
4176 }
4177
4178 if (s->_raw_size == 0)
4179 {
4180 _bfd_strip_section_from_output (info, s);
4181 continue;
4182 }
4183
4184 /* .plt is in the bss section. We don't initialise it. */
4185 if ((s->flags & SEC_LOAD) == 0)
4186 continue;
4187
4188 /* Allocate memory for the section contents. We use bfd_zalloc
4189 here in case unused entries are not reclaimed before the
4190 section's contents are written out. This should not happen,
4191 but this way if it does, we get a R_PPC64_NONE reloc instead
4192 of garbage. */
4193 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
4194 if (s->contents == NULL)
4195 return false;
4196 }
4197
4198 if (htab->elf.dynamic_sections_created)
4199 {
4200 /* Add some entries to the .dynamic section. We fill in the
4201 values later, in ppc64_elf_finish_dynamic_sections, but we
4202 must add the entries now so that we get the correct size for
4203 the .dynamic section. The DT_DEBUG entry is filled in by the
4204 dynamic linker and used by the debugger. */
4205 #define add_dynamic_entry(TAG, VAL) \
4206 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
4207
4208 if (!info->shared)
4209 {
4210 if (!add_dynamic_entry (DT_DEBUG, 0))
4211 return false;
4212 }
4213
4214 if (htab->splt != NULL && htab->splt->_raw_size != 0)
4215 {
4216 if (!add_dynamic_entry (DT_PLTGOT, 0)
4217 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4218 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4219 || !add_dynamic_entry (DT_JMPREL, 0)
4220 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
4221 return false;
4222 }
4223
4224 if (NO_OPD_RELOCS)
4225 {
4226 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
4227 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
4228 return false;
4229 }
4230
4231 if (relocs)
4232 {
4233 if (!add_dynamic_entry (DT_RELA, 0)
4234 || !add_dynamic_entry (DT_RELASZ, 0)
4235 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
4236 return false;
4237
4238 /* If any dynamic relocs apply to a read-only section,
4239 then we need a DT_TEXTREL entry. */
4240 if ((info->flags & DF_TEXTREL) == 0)
4241 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
4242 (PTR) info);
4243
4244 if ((info->flags & DF_TEXTREL) != 0)
4245 {
4246 if (!add_dynamic_entry (DT_TEXTREL, 0))
4247 return false;
4248 }
4249 }
4250 }
4251 #undef add_dynamic_entry
4252
4253 return true;
4254 }
4255
4256 /* Determine the type of stub needed, if any, for a call. */
4257
4258 static INLINE enum ppc_stub_type
4259 ppc_type_of_stub (input_sec, rel, hash, destination)
4260 asection *input_sec;
4261 const Elf_Internal_Rela *rel;
4262 struct ppc_link_hash_entry **hash;
4263 bfd_vma destination;
4264 {
4265 struct ppc_link_hash_entry *h = *hash;
4266 bfd_vma location;
4267 bfd_vma branch_offset;
4268 bfd_vma max_branch_offset;
4269 unsigned int r_type;
4270
4271 if (h != NULL)
4272 {
4273 if (h->oh != NULL
4274 && h->oh->plt.offset != (bfd_vma) -1
4275 && h->oh->dynindx != -1)
4276 {
4277 *hash = (struct ppc_link_hash_entry *) h->oh;
4278 return ppc_stub_plt_call;
4279 }
4280
4281 if (h->elf.root.type == bfd_link_hash_undefweak
4282 || h->elf.root.type == bfd_link_hash_undefined)
4283 return ppc_stub_none;
4284 }
4285
4286 /* Determine where the call point is. */
4287 location = (input_sec->output_offset
4288 + input_sec->output_section->vma
4289 + rel->r_offset);
4290
4291 branch_offset = destination - location;
4292 r_type = ELF64_R_TYPE (rel->r_info);
4293
4294 /* Determine if a long branch stub is needed. */
4295 max_branch_offset = 1 << 25;
4296 if (r_type != (unsigned int) R_PPC64_REL24)
4297 max_branch_offset = 1 << 15;
4298
4299 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
4300 /* We need a stub. Figure out whether a long_branch or plt_branch
4301 is needed later. */
4302 return ppc_stub_long_branch;
4303
4304 return ppc_stub_none;
4305 }
4306
4307 /* Build a .plt call stub. */
4308
4309 static bfd_byte *
4310 build_plt_stub (obfd, p, offset, glink)
4311 bfd *obfd;
4312 bfd_byte *p;
4313 int offset;
4314 int glink;
4315 {
4316 #define PPC_LO(v) ((v) & 0xffff)
4317 #define PPC_HI(v) (((v) >> 16) & 0xffff)
4318 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
4319
4320 if (glink)
4321 bfd_put_32 (obfd, LD_R2_40R1, p), p += 4;
4322 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
4323 if (!glink)
4324 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
4325 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
4326 if (PPC_HA (offset + 8) != PPC_HA (offset))
4327 bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
4328 offset += 8;
4329 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
4330 if (PPC_HA (offset + 8) != PPC_HA (offset))
4331 bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
4332 offset += 8;
4333 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
4334 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
4335 bfd_put_32 (obfd, BCTR, p), p += 4;
4336 return p;
4337 }
4338
4339 static boolean
4340 ppc_build_one_stub (gen_entry, in_arg)
4341 struct bfd_hash_entry *gen_entry;
4342 PTR in_arg;
4343 {
4344 struct ppc_stub_hash_entry *stub_entry;
4345 struct ppc_branch_hash_entry *br_entry;
4346 struct bfd_link_info *info;
4347 struct ppc_link_hash_table *htab;
4348 asection *stub_sec;
4349 bfd *stub_bfd;
4350 bfd_byte *loc;
4351 bfd_byte *p;
4352 unsigned int indx;
4353 bfd_vma off;
4354 int size;
4355
4356 /* Massage our args to the form they really have. */
4357 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
4358 info = (struct bfd_link_info *) in_arg;
4359
4360 htab = ppc_hash_table (info);
4361 stub_sec = stub_entry->stub_sec;
4362
4363 /* Make a note of the offset within the stubs for this entry. */
4364 stub_entry->stub_offset = stub_sec->_cooked_size;
4365 loc = stub_sec->contents + stub_entry->stub_offset;
4366
4367 stub_bfd = stub_sec->owner;
4368
4369 switch (stub_entry->stub_type)
4370 {
4371 case ppc_stub_long_branch:
4372 /* Branches are relative. This is where we are going to. */
4373 off = (stub_entry->target_value
4374 + stub_entry->target_section->output_offset
4375 + stub_entry->target_section->output_section->vma);
4376
4377 /* And this is where we are coming from. */
4378 off -= (stub_entry->stub_offset
4379 + stub_sec->output_offset
4380 + stub_sec->output_section->vma);
4381
4382 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
4383
4384 bfd_put_32 (stub_bfd, (bfd_vma) B_DOT | (off & 0x3fffffc), loc);
4385 size = 4;
4386 break;
4387
4388 case ppc_stub_plt_branch:
4389 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
4390 stub_entry->root.string + 9,
4391 false, false);
4392 if (br_entry == NULL)
4393 {
4394 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
4395 stub_entry->root.string + 9);
4396 htab->stub_error = true;
4397 return false;
4398 }
4399
4400 off = (stub_entry->target_value
4401 + stub_entry->target_section->output_offset
4402 + stub_entry->target_section->output_section->vma);
4403
4404 bfd_put_64 (htab->sbrlt->owner, off,
4405 htab->sbrlt->contents + br_entry->offset);
4406
4407 if (info->shared)
4408 {
4409 /* Create a reloc for the branch lookup table entry. */
4410 Elf_Internal_Rela rela;
4411 Elf64_External_Rela *r;
4412
4413 rela.r_offset = (br_entry->offset
4414 + htab->sbrlt->output_offset
4415 + htab->sbrlt->output_section->vma);
4416 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
4417 rela.r_addend = off;
4418
4419 r = (Elf64_External_Rela *) htab->srelbrlt->contents;
4420 r += htab->srelbrlt->reloc_count++;
4421 bfd_elf64_swap_reloca_out (htab->srelbrlt->owner, &rela, r);
4422 }
4423
4424 off = (br_entry->offset
4425 + htab->sbrlt->output_offset
4426 + htab->sbrlt->output_section->vma
4427 - elf_gp (htab->sbrlt->output_section->owner)
4428 - TOC_BASE_OFF);
4429
4430 if (off + 0x80000000 > 0xffffffff || (off & 7) != 0)
4431 {
4432 (*_bfd_error_handler)
4433 (_("linkage table error against `%s'"),
4434 stub_entry->root.string);
4435 bfd_set_error (bfd_error_bad_value);
4436 htab->stub_error = true;
4437 return false;
4438 }
4439
4440 indx = off;
4441 bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc);
4442 bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc + 4);
4443 bfd_put_32 (stub_bfd, (bfd_vma) MTCTR_R11, loc + 8);
4444 bfd_put_32 (stub_bfd, (bfd_vma) BCTR, loc + 12);
4445 size = 16;
4446 break;
4447
4448 case ppc_stub_plt_call:
4449 /* Build the .glink lazy link call stub. */
4450 p = htab->sglink->contents + htab->sglink->_cooked_size;
4451 indx = htab->sglink->reloc_count;
4452 if (indx < 0x8000)
4453 {
4454 bfd_put_32 (htab->sglink->owner, LI_R0_0 | indx, p);
4455 p += 4;
4456 }
4457 else
4458 {
4459 bfd_put_32 (htab->sglink->owner, LIS_R0_0 | PPC_HI (indx), p);
4460 p += 4;
4461 bfd_put_32 (htab->sglink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
4462 p += 4;
4463 }
4464 bfd_put_32 (htab->sglink->owner,
4465 B_DOT | ((htab->sglink->contents - p) & 0x3fffffc), p);
4466 p += 4;
4467 htab->sglink->_cooked_size = p - htab->sglink->contents;
4468 htab->sglink->reloc_count += 1;
4469
4470 /* Do the best we can for shared libraries built without
4471 exporting ".foo" for each "foo". This can happen when symbol
4472 versioning scripts strip all bar a subset of symbols. */
4473 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
4474 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
4475 {
4476 /* Point the symbol at the stub. There may be multiple stubs,
4477 we don't really care; The main thing is to make this sym
4478 defined somewhere. */
4479 stub_entry->h->oh->root.type = bfd_link_hash_defined;
4480 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
4481 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
4482 }
4483
4484 /* Now build the stub. */
4485 off = stub_entry->h->elf.plt.offset;
4486 if (off >= (bfd_vma) -2)
4487 abort ();
4488
4489 off &= ~ (bfd_vma) 1;
4490 off += (htab->splt->output_offset
4491 + htab->splt->output_section->vma
4492 - elf_gp (htab->splt->output_section->owner)
4493 - TOC_BASE_OFF);
4494
4495 if (off + 0x80000000 > 0xffffffff || (off & 7) != 0)
4496 {
4497 (*_bfd_error_handler)
4498 (_("linkage table error against `%s'"),
4499 stub_entry->h->elf.root.root.string);
4500 bfd_set_error (bfd_error_bad_value);
4501 htab->stub_error = true;
4502 return false;
4503 }
4504
4505 p = build_plt_stub (stub_bfd, loc, (int) off, 0);
4506 size = p - loc;
4507 break;
4508
4509 default:
4510 BFD_FAIL ();
4511 return false;
4512 }
4513
4514 stub_sec->_cooked_size += size;
4515 return true;
4516 }
4517
4518 /* As above, but don't actually build the stub. Just bump offset so
4519 we know stub section sizes, and select plt_branch stubs where
4520 long_branch stubs won't do. */
4521
4522 static boolean
4523 ppc_size_one_stub (gen_entry, in_arg)
4524 struct bfd_hash_entry *gen_entry;
4525 PTR in_arg;
4526 {
4527 struct ppc_stub_hash_entry *stub_entry;
4528 struct ppc_link_hash_table *htab;
4529 bfd_vma off;
4530 int size;
4531
4532 /* Massage our args to the form they really have. */
4533 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
4534 htab = (struct ppc_link_hash_table *) in_arg;
4535
4536 if (stub_entry->stub_type == ppc_stub_plt_call)
4537 {
4538 off = stub_entry->h->elf.plt.offset & ~(bfd_vma) 1;
4539 off += (htab->splt->output_offset
4540 + htab->splt->output_section->vma
4541 - elf_gp (htab->splt->output_section->owner)
4542 - TOC_BASE_OFF);
4543
4544 size = 28;
4545 if (PPC_HA ((int) off + 16) != PPC_HA ((int) off))
4546 size += 4;
4547 }
4548 else
4549 {
4550 /* ppc_stub_long_branch or ppc_stub_plt_branch. */
4551 stub_entry->stub_type = ppc_stub_long_branch;
4552 size = 4;
4553
4554 off = (stub_entry->target_value
4555 + stub_entry->target_section->output_offset
4556 + stub_entry->target_section->output_section->vma);
4557 off -= (stub_entry->stub_sec->_raw_size
4558 + stub_entry->stub_sec->output_offset
4559 + stub_entry->stub_sec->output_section->vma);
4560
4561 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
4562 {
4563 struct ppc_branch_hash_entry *br_entry;
4564
4565 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
4566 stub_entry->root.string + 9,
4567 true, false);
4568 if (br_entry == NULL)
4569 {
4570 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
4571 stub_entry->root.string + 9);
4572 htab->stub_error = true;
4573 return false;
4574 }
4575
4576 if (br_entry->iter != htab->stub_iteration)
4577 {
4578 br_entry->iter = htab->stub_iteration;
4579 br_entry->offset = htab->sbrlt->_raw_size;
4580 htab->sbrlt->_raw_size += 8;
4581 }
4582 stub_entry->stub_type = ppc_stub_plt_branch;
4583 size = 16;
4584 }
4585 }
4586
4587 stub_entry->stub_sec->_raw_size += size;
4588 return true;
4589 }
4590
4591 /* Set up various things so that we can make a list of input sections
4592 for each output section included in the link. Returns -1 on error,
4593 0 when no stubs will be needed, and 1 on success. */
4594
4595 int
4596 ppc64_elf_setup_section_lists (output_bfd, info)
4597 bfd *output_bfd;
4598 struct bfd_link_info *info;
4599 {
4600 bfd *input_bfd;
4601 int top_id, top_index;
4602 asection *section;
4603 asection **input_list, **list;
4604 bfd_size_type amt;
4605 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4606
4607 if (htab->elf.root.creator->flavour != bfd_target_elf_flavour
4608 || htab->sbrlt == NULL)
4609 return 0;
4610
4611 /* Find the top input section id. */
4612 for (input_bfd = info->input_bfds, top_id = 0;
4613 input_bfd != NULL;
4614 input_bfd = input_bfd->link_next)
4615 {
4616 for (section = input_bfd->sections;
4617 section != NULL;
4618 section = section->next)
4619 {
4620 if (top_id < section->id)
4621 top_id = section->id;
4622 }
4623 }
4624
4625 amt = sizeof (struct map_stub) * (top_id + 1);
4626 htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
4627 if (htab->stub_group == NULL)
4628 return -1;
4629
4630 /* We can't use output_bfd->section_count here to find the top output
4631 section index as some sections may have been removed, and
4632 _bfd_strip_section_from_output doesn't renumber the indices. */
4633 for (section = output_bfd->sections, top_index = 0;
4634 section != NULL;
4635 section = section->next)
4636 {
4637 if (top_index < section->index)
4638 top_index = section->index;
4639 }
4640
4641 htab->top_index = top_index;
4642 amt = sizeof (asection *) * (top_index + 1);
4643 input_list = (asection **) bfd_malloc (amt);
4644 htab->input_list = input_list;
4645 if (input_list == NULL)
4646 return -1;
4647
4648 /* For sections we aren't interested in, mark their entries with a
4649 value we can check later. */
4650 list = input_list + top_index;
4651 do
4652 *list = bfd_abs_section_ptr;
4653 while (list-- != input_list);
4654
4655 for (section = output_bfd->sections;
4656 section != NULL;
4657 section = section->next)
4658 {
4659 if ((section->flags & SEC_CODE) != 0)
4660 input_list[section->index] = NULL;
4661 }
4662
4663 return 1;
4664 }
4665
4666 /* The linker repeatedly calls this function for each input section,
4667 in the order that input sections are linked into output sections.
4668 Build lists of input sections to determine groupings between which
4669 we may insert linker stubs. */
4670
4671 void
4672 ppc64_elf_next_input_section (info, isec)
4673 struct bfd_link_info *info;
4674 asection *isec;
4675 {
4676 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4677
4678 if (isec->output_section->index <= htab->top_index)
4679 {
4680 asection **list = htab->input_list + isec->output_section->index;
4681 if (*list != bfd_abs_section_ptr)
4682 {
4683 /* Steal the link_sec pointer for our list. */
4684 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
4685 /* This happens to make the list in reverse order,
4686 which is what we want. */
4687 PREV_SEC (isec) = *list;
4688 *list = isec;
4689 }
4690 }
4691 }
4692
4693 /* See whether we can group stub sections together. Grouping stub
4694 sections may result in fewer stubs. More importantly, we need to
4695 put all .init* and .fini* stubs at the beginning of the .init or
4696 .fini output sections respectively, because glibc splits the
4697 _init and _fini functions into multiple parts. Putting a stub in
4698 the middle of a function is not a good idea. */
4699
4700 static void
4701 group_sections (htab, stub_group_size, stubs_always_before_branch)
4702 struct ppc_link_hash_table *htab;
4703 bfd_size_type stub_group_size;
4704 boolean stubs_always_before_branch;
4705 {
4706 asection **list = htab->input_list + htab->top_index;
4707 do
4708 {
4709 asection *tail = *list;
4710 if (tail == bfd_abs_section_ptr)
4711 continue;
4712 while (tail != NULL)
4713 {
4714 asection *curr;
4715 asection *prev;
4716 bfd_size_type total;
4717
4718 curr = tail;
4719 if (tail->_cooked_size)
4720 total = tail->_cooked_size;
4721 else
4722 total = tail->_raw_size;
4723 while ((prev = PREV_SEC (curr)) != NULL
4724 && ((total += curr->output_offset - prev->output_offset)
4725 < stub_group_size))
4726 curr = prev;
4727
4728 /* OK, the size from the start of CURR to the end is less
4729 than stub_group_size and thus can be handled by one stub
4730 section. (or the tail section is itself larger than
4731 stub_group_size, in which case we may be toast.) We
4732 should really be keeping track of the total size of stubs
4733 added here, as stubs contribute to the final output
4734 section size. That's a little tricky, and this way will
4735 only break if stubs added make the total size more than
4736 2^25, ie. for the default stub_group_size, if stubs total
4737 more than 2834432 bytes, or over 100000 plt call stubs. */
4738 do
4739 {
4740 prev = PREV_SEC (tail);
4741 /* Set up this stub group. */
4742 htab->stub_group[tail->id].link_sec = curr;
4743 }
4744 while (tail != curr && (tail = prev) != NULL);
4745
4746 /* But wait, there's more! Input sections up to stub_group_size
4747 bytes before the stub section can be handled by it too. */
4748 if (!stubs_always_before_branch)
4749 {
4750 total = 0;
4751 while (prev != NULL
4752 && ((total += tail->output_offset - prev->output_offset)
4753 < stub_group_size))
4754 {
4755 tail = prev;
4756 prev = PREV_SEC (tail);
4757 htab->stub_group[tail->id].link_sec = curr;
4758 }
4759 }
4760 tail = prev;
4761 }
4762 }
4763 while (list-- != htab->input_list);
4764 free (htab->input_list);
4765 #undef PREV_SEC
4766 }
4767
4768 /* Determine and set the size of the stub section for a final link.
4769
4770 The basic idea here is to examine all the relocations looking for
4771 PC-relative calls to a target that is unreachable with a "bl"
4772 instruction. */
4773
4774 boolean
4775 ppc64_elf_size_stubs (output_bfd, stub_bfd, info, group_size,
4776 add_stub_section, layout_sections_again)
4777 bfd *output_bfd;
4778 bfd *stub_bfd;
4779 struct bfd_link_info *info;
4780 bfd_signed_vma group_size;
4781 asection * (*add_stub_section) PARAMS ((const char *, asection *));
4782 void (*layout_sections_again) PARAMS ((void));
4783 {
4784 bfd_size_type stub_group_size;
4785 boolean stubs_always_before_branch;
4786 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4787
4788 /* Stash our params away. */
4789 htab->stub_bfd = stub_bfd;
4790 htab->add_stub_section = add_stub_section;
4791 htab->layout_sections_again = layout_sections_again;
4792 stubs_always_before_branch = group_size < 0;
4793 if (group_size < 0)
4794 stub_group_size = -group_size;
4795 else
4796 stub_group_size = group_size;
4797 if (stub_group_size == 1)
4798 {
4799 /* Default values. */
4800 stub_group_size = 30720000;
4801 if (htab->has_14bit_branch)
4802 stub_group_size = 30000;
4803 }
4804
4805 group_sections (htab, stub_group_size, stubs_always_before_branch);
4806
4807 while (1)
4808 {
4809 bfd *input_bfd;
4810 unsigned int bfd_indx;
4811 asection *stub_sec;
4812 boolean stub_changed;
4813
4814 htab->stub_iteration += 1;
4815 stub_changed = false;
4816
4817 for (input_bfd = info->input_bfds, bfd_indx = 0;
4818 input_bfd != NULL;
4819 input_bfd = input_bfd->link_next, bfd_indx++)
4820 {
4821 Elf_Internal_Shdr *symtab_hdr;
4822 asection *section;
4823 Elf_Internal_Sym *local_syms = NULL;
4824
4825 /* We'll need the symbol table in a second. */
4826 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4827 if (symtab_hdr->sh_info == 0)
4828 continue;
4829
4830 /* Walk over each section attached to the input bfd. */
4831 for (section = input_bfd->sections;
4832 section != NULL;
4833 section = section->next)
4834 {
4835 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4836
4837 /* If there aren't any relocs, then there's nothing more
4838 to do. */
4839 if ((section->flags & SEC_RELOC) == 0
4840 || section->reloc_count == 0)
4841 continue;
4842
4843 /* If this section is a link-once section that will be
4844 discarded, then don't create any stubs. */
4845 if (section->output_section == NULL
4846 || section->output_section->owner != output_bfd)
4847 continue;
4848
4849 /* Get the relocs. */
4850 internal_relocs
4851 = _bfd_elf64_link_read_relocs (input_bfd, section, NULL,
4852 (Elf_Internal_Rela *) NULL,
4853 info->keep_memory);
4854 if (internal_relocs == NULL)
4855 goto error_ret_free_local;
4856
4857 /* Now examine each relocation. */
4858 irela = internal_relocs;
4859 irelaend = irela + section->reloc_count;
4860 for (; irela < irelaend; irela++)
4861 {
4862 unsigned int r_type, r_indx;
4863 enum ppc_stub_type stub_type;
4864 struct ppc_stub_hash_entry *stub_entry;
4865 asection *sym_sec;
4866 bfd_vma sym_value;
4867 bfd_vma destination;
4868 struct ppc_link_hash_entry *hash;
4869 char *stub_name;
4870 const asection *id_sec;
4871
4872 r_type = ELF64_R_TYPE (irela->r_info);
4873 r_indx = ELF64_R_SYM (irela->r_info);
4874
4875 if (r_type >= (unsigned int) R_PPC_max)
4876 {
4877 bfd_set_error (bfd_error_bad_value);
4878 goto error_ret_free_internal;
4879 }
4880
4881 /* Only look for stubs on branch instructions. */
4882 if (r_type != (unsigned int) R_PPC64_REL24
4883 && r_type != (unsigned int) R_PPC64_REL14
4884 && r_type != (unsigned int) R_PPC64_REL14_BRTAKEN
4885 && r_type != (unsigned int) R_PPC64_REL14_BRNTAKEN)
4886 continue;
4887
4888 /* Now determine the call target, its name, value,
4889 section. */
4890 sym_sec = NULL;
4891 sym_value = 0;
4892 destination = 0;
4893 hash = NULL;
4894 if (r_indx < symtab_hdr->sh_info)
4895 {
4896 /* It's a local symbol. */
4897 Elf_Internal_Sym *sym;
4898 Elf_Internal_Shdr *hdr;
4899
4900 if (local_syms == NULL)
4901 {
4902 local_syms
4903 = (Elf_Internal_Sym *) symtab_hdr->contents;
4904 if (local_syms == NULL)
4905 local_syms
4906 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
4907 symtab_hdr->sh_info, 0,
4908 NULL, NULL, NULL);
4909 if (local_syms == NULL)
4910 goto error_ret_free_internal;
4911 }
4912 sym = local_syms + r_indx;
4913 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
4914 sym_sec = hdr->bfd_section;
4915 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4916 sym_value = sym->st_value;
4917 destination = (sym_value + irela->r_addend
4918 + sym_sec->output_offset
4919 + sym_sec->output_section->vma);
4920 }
4921 else
4922 {
4923 /* It's an external symbol. */
4924 int e_indx;
4925
4926 e_indx = r_indx - symtab_hdr->sh_info;
4927 hash = ((struct ppc_link_hash_entry *)
4928 elf_sym_hashes (input_bfd)[e_indx]);
4929
4930 while (hash->elf.root.type == bfd_link_hash_indirect
4931 || hash->elf.root.type == bfd_link_hash_warning)
4932 hash = ((struct ppc_link_hash_entry *)
4933 hash->elf.root.u.i.link);
4934
4935 if (hash->elf.root.type == bfd_link_hash_defined
4936 || hash->elf.root.type == bfd_link_hash_defweak)
4937 {
4938 sym_sec = hash->elf.root.u.def.section;
4939 sym_value = hash->elf.root.u.def.value;
4940 if (sym_sec->output_section != NULL)
4941 destination = (sym_value + irela->r_addend
4942 + sym_sec->output_offset
4943 + sym_sec->output_section->vma);
4944 }
4945 else if (hash->elf.root.type == bfd_link_hash_undefweak)
4946 ;
4947 else if (hash->elf.root.type == bfd_link_hash_undefined)
4948 ;
4949 else
4950 {
4951 bfd_set_error (bfd_error_bad_value);
4952 goto error_ret_free_internal;
4953 }
4954 }
4955
4956 /* Determine what (if any) linker stub is needed. */
4957 stub_type = ppc_type_of_stub (section, irela, &hash,
4958 destination);
4959 if (stub_type == ppc_stub_none)
4960 continue;
4961
4962 /* Support for grouping stub sections. */
4963 id_sec = htab->stub_group[section->id].link_sec;
4964
4965 /* Get the name of this stub. */
4966 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
4967 if (!stub_name)
4968 goto error_ret_free_internal;
4969
4970 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4971 stub_name, false, false);
4972 if (stub_entry != NULL)
4973 {
4974 /* The proper stub has already been created. */
4975 free (stub_name);
4976 continue;
4977 }
4978
4979 stub_entry = ppc_add_stub (stub_name, section, htab);
4980 if (stub_entry == NULL)
4981 {
4982 free (stub_name);
4983 error_ret_free_internal:
4984 if (elf_section_data (section)->relocs == NULL)
4985 free (internal_relocs);
4986 error_ret_free_local:
4987 if (local_syms != NULL
4988 && (symtab_hdr->contents
4989 != (unsigned char *) local_syms))
4990 free (local_syms);
4991 return false;
4992 }
4993
4994 stub_entry->target_value = sym_value;
4995 stub_entry->target_section = sym_sec;
4996 stub_entry->stub_type = stub_type;
4997 stub_entry->h = hash;
4998 stub_changed = true;
4999 }
5000
5001 /* We're done with the internal relocs, free them. */
5002 if (elf_section_data (section)->relocs != internal_relocs)
5003 free (internal_relocs);
5004 }
5005
5006 if (local_syms != NULL
5007 && symtab_hdr->contents != (unsigned char *) local_syms)
5008 {
5009 if (!info->keep_memory)
5010 free (local_syms);
5011 else
5012 symtab_hdr->contents = (unsigned char *) local_syms;
5013 }
5014 }
5015
5016 if (!stub_changed)
5017 break;
5018
5019 /* OK, we've added some stubs. Find out the new size of the
5020 stub sections. */
5021 for (stub_sec = htab->stub_bfd->sections;
5022 stub_sec != NULL;
5023 stub_sec = stub_sec->next)
5024 {
5025 stub_sec->_raw_size = 0;
5026 stub_sec->_cooked_size = 0;
5027 }
5028 htab->sbrlt->_raw_size = 0;
5029 htab->sbrlt->_cooked_size = 0;
5030
5031 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
5032
5033 /* Ask the linker to do its stuff. */
5034 (*htab->layout_sections_again) ();
5035 }
5036
5037 /* It would be nice to strip .branch_lt from the output if the
5038 section is empty, but it's too late. If we strip sections here,
5039 the dynamic symbol table is corrupted since the section symbol
5040 for the stripped section isn't written. */
5041
5042 return true;
5043 }
5044
5045 /* Called after we have determined section placement. If sections
5046 move, we'll be called again. Provide a value for TOCstart. */
5047
5048 bfd_vma
5049 ppc64_elf_toc (obfd)
5050 bfd *obfd;
5051 {
5052 asection *s;
5053 bfd_vma TOCstart;
5054
5055 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
5056 order. The TOC starts where the first of these sections starts. */
5057 s = bfd_get_section_by_name (obfd, ".got");
5058 if (s == NULL)
5059 s = bfd_get_section_by_name (obfd, ".toc");
5060 if (s == NULL)
5061 s = bfd_get_section_by_name (obfd, ".tocbss");
5062 if (s == NULL)
5063 s = bfd_get_section_by_name (obfd, ".plt");
5064 if (s == NULL)
5065 {
5066 /* This may happen for
5067 o references to TOC base (SYM@toc / TOC[tc0]) without a
5068 .toc directive
5069 o bad linker script
5070 o --gc-sections and empty TOC sections
5071
5072 FIXME: Warn user? */
5073
5074 /* Look for a likely section. We probably won't even be
5075 using TOCstart. */
5076 for (s = obfd->sections; s != NULL; s = s->next)
5077 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
5078 == (SEC_ALLOC | SEC_SMALL_DATA))
5079 break;
5080 if (s == NULL)
5081 for (s = obfd->sections; s != NULL; s = s->next)
5082 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
5083 == (SEC_ALLOC | SEC_SMALL_DATA))
5084 break;
5085 if (s == NULL)
5086 for (s = obfd->sections; s != NULL; s = s->next)
5087 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
5088 break;
5089 if (s == NULL)
5090 for (s = obfd->sections; s != NULL; s = s->next)
5091 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
5092 break;
5093 }
5094
5095 TOCstart = 0;
5096 if (s != NULL)
5097 TOCstart = s->output_section->vma + s->output_offset;
5098
5099 return TOCstart;
5100 }
5101
5102 /* Build all the stubs associated with the current output file.
5103 The stubs are kept in a hash table attached to the main linker
5104 hash table. This function is called via gldelf64ppc_finish. */
5105
5106 boolean
5107 ppc64_elf_build_stubs (info)
5108 struct bfd_link_info *info;
5109 {
5110 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5111 asection *stub_sec;
5112 bfd_vma plt_r2;
5113 bfd_byte *p;
5114
5115 for (stub_sec = htab->stub_bfd->sections;
5116 stub_sec != NULL;
5117 stub_sec = stub_sec->next)
5118 {
5119 bfd_size_type size;
5120
5121 /* Allocate memory to hold the linker stubs. */
5122 size = stub_sec->_raw_size;
5123 if (size != 0)
5124 {
5125 stub_sec->contents = (bfd_byte *) bfd_zalloc (htab->stub_bfd, size);
5126 if (stub_sec->contents == NULL)
5127 return false;
5128 }
5129 stub_sec->_cooked_size = 0;
5130 }
5131
5132 if (htab->splt != NULL)
5133 {
5134 /* Build the .glink plt call stub. */
5135 plt_r2 = (htab->splt->output_offset
5136 + htab->splt->output_section->vma
5137 - elf_gp (htab->splt->output_section->owner)
5138 - TOC_BASE_OFF);
5139 p = htab->sglink->contents;
5140 p = build_plt_stub (htab->sglink->owner, p, (int) plt_r2, 1);
5141 while (p - htab->sglink->contents < GLINK_CALL_STUB_SIZE)
5142 {
5143 bfd_put_32 (htab->sglink->owner, NOP, p);
5144 p += 4;
5145 }
5146 htab->sglink->_cooked_size = p - htab->sglink->contents;
5147
5148 /* Use reloc_count to count entries. */
5149 htab->sglink->reloc_count = 0;
5150 }
5151
5152 if (htab->sbrlt->_raw_size != 0)
5153 {
5154 htab->sbrlt->contents = (bfd_byte *) bfd_zalloc (htab->sbrlt->owner,
5155 htab->sbrlt->_raw_size);
5156 if (htab->sbrlt->contents == NULL)
5157 return false;
5158 }
5159
5160 /* Build the stubs as directed by the stub hash table. */
5161 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
5162 htab->sglink->reloc_count = 0;
5163
5164 for (stub_sec = htab->stub_bfd->sections;
5165 stub_sec != NULL;
5166 stub_sec = stub_sec->next)
5167 {
5168 if (stub_sec->_raw_size != stub_sec->_cooked_size)
5169 break;
5170 }
5171
5172 if (stub_sec != NULL
5173 || htab->sglink->_raw_size != htab->sglink->_cooked_size)
5174 {
5175 htab->stub_error = true;
5176 (*_bfd_error_handler) (_("stubs don't match calculated size"));
5177 }
5178
5179 return !htab->stub_error;
5180 }
5181
5182 /* The RELOCATE_SECTION function is called by the ELF backend linker
5183 to handle the relocations for a section.
5184
5185 The relocs are always passed as Rela structures; if the section
5186 actually uses Rel structures, the r_addend field will always be
5187 zero.
5188
5189 This function is responsible for adjust the section contents as
5190 necessary, and (if using Rela relocs and generating a
5191 relocateable output file) adjusting the reloc addend as
5192 necessary.
5193
5194 This function does not have to worry about setting the reloc
5195 address or the reloc symbol index.
5196
5197 LOCAL_SYMS is a pointer to the swapped in local symbols.
5198
5199 LOCAL_SECTIONS is an array giving the section in the input file
5200 corresponding to the st_shndx field of each local symbol.
5201
5202 The global hash table entry for the global symbols can be found
5203 via elf_sym_hashes (input_bfd).
5204
5205 When generating relocateable output, this function must handle
5206 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5207 going to be the section symbol corresponding to the output
5208 section, which means that the addend must be adjusted
5209 accordingly. */
5210
5211 static boolean
5212 ppc64_elf_relocate_section (output_bfd, info, input_bfd, input_section,
5213 contents, relocs, local_syms, local_sections)
5214 bfd *output_bfd;
5215 struct bfd_link_info *info;
5216 bfd *input_bfd;
5217 asection *input_section;
5218 bfd_byte *contents;
5219 Elf_Internal_Rela *relocs;
5220 Elf_Internal_Sym *local_syms;
5221 asection **local_sections;
5222 {
5223 struct ppc_link_hash_table *htab;
5224 Elf_Internal_Shdr *symtab_hdr;
5225 struct elf_link_hash_entry **sym_hashes;
5226 Elf_Internal_Rela *rel;
5227 Elf_Internal_Rela *relend;
5228 bfd_vma *local_got_offsets;
5229 bfd_vma TOCstart;
5230 boolean ret = true;
5231 boolean is_opd;
5232 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
5233 boolean is_power4 = false;
5234
5235 if (info->relocateable)
5236 return true;
5237
5238 /* Initialize howto table if needed. */
5239 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5240 ppc_howto_init ();
5241
5242 htab = ppc_hash_table (info);
5243 local_got_offsets = elf_local_got_offsets (input_bfd);
5244 TOCstart = elf_gp (output_bfd);
5245 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5246 sym_hashes = elf_sym_hashes (input_bfd);
5247 is_opd = elf_section_data (input_section)->tdata != NULL;
5248
5249 rel = relocs;
5250 relend = relocs + input_section->reloc_count;
5251 for (; rel < relend; rel++)
5252 {
5253 enum elf_ppc_reloc_type r_type;
5254 bfd_vma offset;
5255 bfd_vma addend;
5256 bfd_reloc_status_type r;
5257 Elf_Internal_Sym *sym;
5258 asection *sec;
5259 struct elf_link_hash_entry *h;
5260 struct elf_link_hash_entry *fdh;
5261 const char *sym_name;
5262 unsigned long r_symndx;
5263 bfd_vma relocation;
5264 boolean unresolved_reloc;
5265 boolean warned;
5266 long insn;
5267 struct ppc_stub_hash_entry *stub_entry;
5268 bfd_vma max_br_offset;
5269 bfd_vma from;
5270
5271 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
5272 r_symndx = ELF64_R_SYM (rel->r_info);
5273 offset = rel->r_offset;
5274 addend = rel->r_addend;
5275 r = bfd_reloc_other;
5276 sym = (Elf_Internal_Sym *) 0;
5277 sec = (asection *) 0;
5278 h = (struct elf_link_hash_entry *) 0;
5279 sym_name = (const char *) 0;
5280 unresolved_reloc = false;
5281 warned = false;
5282
5283 if (r_type == R_PPC64_TOC)
5284 {
5285 /* Relocation value is TOC base. Symbol is ignored. */
5286 relocation = TOCstart + TOC_BASE_OFF;
5287 }
5288 else if (r_symndx < symtab_hdr->sh_info)
5289 {
5290 /* It's a local symbol. */
5291 sym = local_syms + r_symndx;
5292 sec = local_sections[r_symndx];
5293 sym_name = "<local symbol>";
5294
5295 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
5296 /* rel may have changed, update our copy of addend. */
5297 addend = rel->r_addend;
5298
5299 if (elf_section_data (sec) != NULL)
5300 {
5301 long *opd_sym_adjust;
5302
5303 opd_sym_adjust = (long *) elf_section_data (sec)->tdata;
5304 if (opd_sym_adjust != NULL && sym->st_value % 24 == 0)
5305 relocation += opd_sym_adjust[sym->st_value / 24];
5306 }
5307 }
5308 else
5309 {
5310 /* It's a global symbol. */
5311 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5312 while (h->root.type == bfd_link_hash_indirect
5313 || h->root.type == bfd_link_hash_warning)
5314 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5315 sym_name = h->root.root.string;
5316 relocation = 0;
5317 if (h->root.type == bfd_link_hash_defined
5318 || h->root.type == bfd_link_hash_defweak)
5319 {
5320 sec = h->root.u.def.section;
5321 if (sec->output_section == NULL)
5322 /* Set a flag that will be cleared later if we find a
5323 relocation value for this symbol. output_section
5324 is typically NULL for symbols satisfied by a shared
5325 library. */
5326 unresolved_reloc = true;
5327 else
5328 relocation = (h->root.u.def.value
5329 + sec->output_section->vma
5330 + sec->output_offset);
5331 }
5332 else if (h->root.type == bfd_link_hash_undefweak)
5333 ;
5334 else if (info->shared
5335 && (!info->symbolic || info->allow_shlib_undefined)
5336 && !info->no_undefined
5337 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5338 ;
5339 else
5340 {
5341 if (! ((*info->callbacks->undefined_symbol)
5342 (info, h->root.root.string, input_bfd, input_section,
5343 offset, (!info->shared
5344 || info->no_undefined
5345 || ELF_ST_VISIBILITY (h->other)))))
5346 return false;
5347 warned = true;
5348 }
5349 }
5350
5351 /* First handle relocations that tweak non-addend part of insn. */
5352 insn = 0;
5353 switch (r_type)
5354 {
5355 default:
5356 break;
5357
5358 /* Branch taken prediction relocations. */
5359 case R_PPC64_ADDR14_BRTAKEN:
5360 case R_PPC64_REL14_BRTAKEN:
5361 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
5362 /* Fall thru. */
5363
5364 /* Branch not taken prediction relocations. */
5365 case R_PPC64_ADDR14_BRNTAKEN:
5366 case R_PPC64_REL14_BRNTAKEN:
5367 insn |= bfd_get_32 (output_bfd, contents + offset) & ~(0x01 << 21);
5368 if (is_power4)
5369 {
5370 /* Set 'a' bit. This is 0b00010 in BO field for branch
5371 on CR(BI) insns (BO == 001at or 011at), and 0b01000
5372 for branch on CTR insns (BO == 1a00t or 1a01t). */
5373 if ((insn & (0x14 << 21)) == (0x04 << 21))
5374 insn |= 0x02 << 21;
5375 else if ((insn & (0x14 << 21)) == (0x10 << 21))
5376 insn |= 0x08 << 21;
5377 else
5378 break;
5379 }
5380 else
5381 {
5382 from = (offset
5383 + input_section->output_offset
5384 + input_section->output_section->vma);
5385
5386 /* Invert 'y' bit if not the default. */
5387 if ((bfd_signed_vma) (relocation + addend - from) < 0)
5388 insn ^= 0x01 << 21;
5389 }
5390
5391 bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
5392 break;
5393
5394 case R_PPC64_REL24:
5395 /* A REL24 branching to a linkage function is followed by a
5396 nop. We replace the nop with a ld in order to restore
5397 the TOC base pointer. Only calls to shared objects need
5398 to alter the TOC base. These are recognized by their
5399 need for a PLT entry. */
5400 if (h != NULL
5401 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
5402 && fdh->plt.offset != (bfd_vma) -1
5403 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
5404 rel, htab)) != NULL)
5405 {
5406 boolean can_plt_call = 0;
5407
5408 if (offset + 8 <= input_section->_cooked_size)
5409 {
5410 insn = bfd_get_32 (input_bfd, contents + offset + 4);
5411 if (insn == NOP
5412 || insn == CROR_151515 || insn == CROR_313131)
5413 {
5414 bfd_put_32 (input_bfd, (bfd_vma) LD_R2_40R1,
5415 contents + offset + 4);
5416 can_plt_call = 1;
5417 }
5418 }
5419
5420 if (!can_plt_call)
5421 {
5422 /* If this is a plain branch rather than a branch
5423 and link, don't require a nop. */
5424 insn = bfd_get_32 (input_bfd, contents + offset);
5425 if ((insn & 1) == 0)
5426 can_plt_call = 1;
5427 }
5428
5429 if (can_plt_call)
5430 {
5431 relocation = (stub_entry->stub_offset
5432 + stub_entry->stub_sec->output_offset
5433 + stub_entry->stub_sec->output_section->vma);
5434 addend = 0;
5435 unresolved_reloc = false;
5436 }
5437 }
5438
5439 if (h != NULL
5440 && h->root.type == bfd_link_hash_undefweak
5441 && relocation == 0
5442 && addend == 0)
5443 {
5444 /* Tweak calls to undefined weak functions to point at a
5445 blr. We can thus call a weak function without first
5446 checking whether the function is defined. We have a
5447 blr at the end of .sfpr. */
5448 BFD_ASSERT (htab->sfpr->_raw_size != 0);
5449 relocation = (htab->sfpr->_raw_size - 4
5450 + htab->sfpr->output_offset
5451 + htab->sfpr->output_section->vma);
5452 from = (offset
5453 + input_section->output_offset
5454 + input_section->output_section->vma);
5455
5456 /* But let's not be silly about it. If the blr isn't in
5457 reach, just go to the next instruction. */
5458 if (relocation - from + (1 << 25) >= (1 << 26)
5459 || htab->sfpr->_raw_size == 0)
5460 relocation = from + 4;
5461 }
5462 break;
5463 }
5464
5465 /* Set `addend'. */
5466 switch (r_type)
5467 {
5468 default:
5469 (*_bfd_error_handler)
5470 (_("%s: unknown relocation type %d for symbol %s"),
5471 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
5472
5473 bfd_set_error (bfd_error_bad_value);
5474 ret = false;
5475 continue;
5476
5477 case R_PPC64_NONE:
5478 case R_PPC_GNU_VTINHERIT:
5479 case R_PPC_GNU_VTENTRY:
5480 continue;
5481
5482 /* GOT16 relocations. Like an ADDR16 using the symbol's
5483 address in the GOT as relocation value instead of the
5484 symbols value itself. Also, create a GOT entry for the
5485 symbol and put the symbol value there. */
5486 case R_PPC64_GOT16:
5487 case R_PPC64_GOT16_LO:
5488 case R_PPC64_GOT16_HI:
5489 case R_PPC64_GOT16_HA:
5490 case R_PPC64_GOT16_DS:
5491 case R_PPC64_GOT16_LO_DS:
5492 {
5493 /* Relocation is to the entry for this symbol in the global
5494 offset table. */
5495 bfd_vma off;
5496
5497 if (htab->sgot == NULL)
5498 abort ();
5499
5500 if (h != NULL)
5501 {
5502 boolean dyn;
5503
5504 off = h->got.offset;
5505 dyn = htab->elf.dynamic_sections_created;
5506 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
5507 || (info->shared
5508 && (info->symbolic
5509 || h->dynindx == -1
5510 || (h->elf_link_hash_flags
5511 & ELF_LINK_FORCED_LOCAL))
5512 && (h->elf_link_hash_flags
5513 & ELF_LINK_HASH_DEF_REGULAR)))
5514 {
5515 /* This is actually a static link, or it is a
5516 -Bsymbolic link and the symbol is defined
5517 locally, or the symbol was forced to be local
5518 because of a version file. We must initialize
5519 this entry in the global offset table. Since the
5520 offset must always be a multiple of 8, we use the
5521 least significant bit to record whether we have
5522 initialized it already.
5523
5524 When doing a dynamic link, we create a .rel.got
5525 relocation entry to initialize the value. This
5526 is done in the finish_dynamic_symbol routine. */
5527 if ((off & 1) != 0)
5528 off &= ~1;
5529 else
5530 {
5531 bfd_put_64 (output_bfd, relocation,
5532 htab->sgot->contents + off);
5533 h->got.offset |= 1;
5534 }
5535 }
5536 else
5537 unresolved_reloc = false;
5538 }
5539 else
5540 {
5541 if (local_got_offsets == NULL)
5542 abort ();
5543
5544 off = local_got_offsets[r_symndx];
5545
5546 /* The offset must always be a multiple of 8. We use
5547 the least significant bit to record whether we have
5548 already processed this entry. */
5549 if ((off & 1) != 0)
5550 off &= ~1;
5551 else
5552 {
5553 bfd_put_64 (output_bfd, relocation,
5554 htab->sgot->contents + off);
5555
5556 if (info->shared)
5557 {
5558 Elf_Internal_Rela outrel;
5559 Elf64_External_Rela *loc;
5560
5561 /* We need to generate a R_PPC64_RELATIVE reloc
5562 for the dynamic linker. */
5563 outrel.r_offset = (htab->sgot->output_section->vma
5564 + htab->sgot->output_offset
5565 + off);
5566 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
5567 outrel.r_addend = relocation;
5568 loc = (Elf64_External_Rela *) htab->srelgot->contents;
5569 loc += htab->srelgot->reloc_count++;
5570 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
5571 }
5572
5573 local_got_offsets[r_symndx] |= 1;
5574 }
5575 }
5576
5577 if (off >= (bfd_vma) -2)
5578 abort ();
5579
5580 relocation = htab->sgot->output_offset + off;
5581
5582 /* TOC base (r2) is TOC start plus 0x8000. */
5583 addend -= TOC_BASE_OFF;
5584 }
5585 break;
5586
5587 case R_PPC64_PLT16_HA:
5588 case R_PPC64_PLT16_HI:
5589 case R_PPC64_PLT16_LO:
5590 case R_PPC64_PLT32:
5591 case R_PPC64_PLT64:
5592 /* Relocation is to the entry for this symbol in the
5593 procedure linkage table. */
5594
5595 /* Resolve a PLT reloc against a local symbol directly,
5596 without using the procedure linkage table. */
5597 if (h == NULL)
5598 break;
5599
5600 if (h->plt.offset == (bfd_vma) -1
5601 || htab->splt == NULL)
5602 {
5603 /* We didn't make a PLT entry for this symbol. This
5604 happens when statically linking PIC code, or when
5605 using -Bsymbolic. */
5606 break;
5607 }
5608
5609 relocation = (htab->splt->output_section->vma
5610 + htab->splt->output_offset
5611 + h->plt.offset);
5612 unresolved_reloc = false;
5613 break;
5614
5615 /* TOC16 relocs. We want the offset relative to the TOC base,
5616 which is the address of the start of the TOC plus 0x8000.
5617 The TOC consists of sections .got, .toc, .tocbss, and .plt,
5618 in this order. */
5619 case R_PPC64_TOC16:
5620 case R_PPC64_TOC16_LO:
5621 case R_PPC64_TOC16_HI:
5622 case R_PPC64_TOC16_DS:
5623 case R_PPC64_TOC16_LO_DS:
5624 case R_PPC64_TOC16_HA:
5625 addend -= TOCstart + TOC_BASE_OFF;
5626 break;
5627
5628 /* Relocate against the beginning of the section. */
5629 case R_PPC64_SECTOFF:
5630 case R_PPC64_SECTOFF_LO:
5631 case R_PPC64_SECTOFF_HI:
5632 case R_PPC64_SECTOFF_DS:
5633 case R_PPC64_SECTOFF_LO_DS:
5634 case R_PPC64_SECTOFF_HA:
5635 if (sec != (asection *) 0)
5636 addend -= sec->output_section->vma;
5637 break;
5638
5639 case R_PPC64_REL14:
5640 case R_PPC64_REL14_BRNTAKEN:
5641 case R_PPC64_REL14_BRTAKEN:
5642 case R_PPC64_REL24:
5643 break;
5644
5645 /* Relocations that may need to be propagated if this is a
5646 dynamic object. */
5647 case R_PPC64_REL32:
5648 case R_PPC64_REL64:
5649 case R_PPC64_ADDR14:
5650 case R_PPC64_ADDR14_BRNTAKEN:
5651 case R_PPC64_ADDR14_BRTAKEN:
5652 case R_PPC64_ADDR16:
5653 case R_PPC64_ADDR16_DS:
5654 case R_PPC64_ADDR16_HA:
5655 case R_PPC64_ADDR16_HI:
5656 case R_PPC64_ADDR16_HIGHER:
5657 case R_PPC64_ADDR16_HIGHERA:
5658 case R_PPC64_ADDR16_HIGHEST:
5659 case R_PPC64_ADDR16_HIGHESTA:
5660 case R_PPC64_ADDR16_LO:
5661 case R_PPC64_ADDR16_LO_DS:
5662 case R_PPC64_ADDR24:
5663 case R_PPC64_ADDR30:
5664 case R_PPC64_ADDR32:
5665 case R_PPC64_ADDR64:
5666 case R_PPC64_UADDR16:
5667 case R_PPC64_UADDR32:
5668 case R_PPC64_UADDR64:
5669 /* r_symndx will be zero only for relocs against symbols
5670 from removed linkonce sections, or sections discarded by
5671 a linker script. */
5672 if (r_symndx == 0)
5673 break;
5674 /* Fall thru. */
5675
5676 case R_PPC64_TOC:
5677 if ((input_section->flags & SEC_ALLOC) == 0)
5678 break;
5679
5680 if (NO_OPD_RELOCS && is_opd)
5681 break;
5682
5683 if ((info->shared
5684 && (IS_ABSOLUTE_RELOC (r_type)
5685 || (h != NULL
5686 && h->dynindx != -1
5687 && (! info->symbolic
5688 || (h->elf_link_hash_flags
5689 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
5690 || (!info->shared
5691 && h != NULL
5692 && h->dynindx != -1
5693 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5694 && (((h->elf_link_hash_flags
5695 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5696 && (h->elf_link_hash_flags
5697 & ELF_LINK_HASH_DEF_REGULAR) == 0)
5698 || h->root.type == bfd_link_hash_undefweak
5699 || h->root.type == bfd_link_hash_undefined)))
5700 {
5701 Elf_Internal_Rela outrel;
5702 boolean skip, relocate;
5703 asection *sreloc;
5704 Elf64_External_Rela *loc;
5705
5706 /* When generating a dynamic object, these relocations
5707 are copied into the output file to be resolved at run
5708 time. */
5709
5710 skip = false;
5711 relocate = false;
5712
5713 outrel.r_offset =
5714 _bfd_elf_section_offset (output_bfd, info, input_section,
5715 rel->r_offset);
5716 if (outrel.r_offset == (bfd_vma) -1)
5717 skip = true;
5718 else if (outrel.r_offset == (bfd_vma) -2)
5719 skip = true, relocate = true;
5720 outrel.r_offset += (input_section->output_section->vma
5721 + input_section->output_offset);
5722 outrel.r_addend = addend;
5723
5724 if (skip)
5725 memset (&outrel, 0, sizeof outrel);
5726 else if (h != NULL
5727 && h->dynindx != -1
5728 && !is_opd
5729 && (!IS_ABSOLUTE_RELOC (r_type)
5730 || !info->shared
5731 || !info->symbolic
5732 || (h->elf_link_hash_flags
5733 & ELF_LINK_HASH_DEF_REGULAR) == 0))
5734 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
5735 else
5736 {
5737 /* This symbol is local, or marked to become local,
5738 or this is an opd section reloc which must point
5739 at a local function. */
5740 outrel.r_addend += relocation;
5741 relocate = true;
5742 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
5743 {
5744 if (is_opd && h != NULL)
5745 {
5746 /* Lie about opd entries. This case occurs
5747 when building shared libraries and we
5748 reference a function in another shared
5749 lib. The same thing happens for a weak
5750 definition in an application that's
5751 overridden by a strong definition in a
5752 shared lib. (I believe this is a generic
5753 bug in binutils handling of weak syms.)
5754 In these cases we won't use the opd
5755 entry in this lib. */
5756 unresolved_reloc = false;
5757 }
5758 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
5759 }
5760 else
5761 {
5762 long indx = 0;
5763
5764 if (bfd_is_abs_section (sec))
5765 ;
5766 else if (sec == NULL || sec->owner == NULL)
5767 {
5768 bfd_set_error (bfd_error_bad_value);
5769 return false;
5770 }
5771 else
5772 {
5773 asection *osec;
5774
5775 osec = sec->output_section;
5776 indx = elf_section_data (osec)->dynindx;
5777
5778 /* We are turning this relocation into one
5779 against a section symbol, so subtract out
5780 the output section's address but not the
5781 offset of the input section in the output
5782 section. */
5783 outrel.r_addend -= osec->vma;
5784 }
5785
5786 outrel.r_info = ELF64_R_INFO (indx, r_type);
5787 }
5788 }
5789
5790 sreloc = elf_section_data (input_section)->sreloc;
5791 if (sreloc == NULL)
5792 abort ();
5793
5794 loc = (Elf64_External_Rela *) sreloc->contents;
5795 loc += sreloc->reloc_count++;
5796 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
5797
5798 /* If this reloc is against an external symbol, it will
5799 be computed at runtime, so there's no need to do
5800 anything now. */
5801 if (! relocate)
5802 continue;
5803 }
5804 break;
5805
5806 case R_PPC64_COPY:
5807 case R_PPC64_GLOB_DAT:
5808 case R_PPC64_JMP_SLOT:
5809 case R_PPC64_RELATIVE:
5810 /* We shouldn't ever see these dynamic relocs in relocatable
5811 files. */
5812 /* Fall thru */
5813
5814 case R_PPC64_PLTGOT16:
5815 case R_PPC64_PLTGOT16_DS:
5816 case R_PPC64_PLTGOT16_HA:
5817 case R_PPC64_PLTGOT16_HI:
5818 case R_PPC64_PLTGOT16_LO:
5819 case R_PPC64_PLTGOT16_LO_DS:
5820 case R_PPC64_PLTREL32:
5821 case R_PPC64_PLTREL64:
5822 /* These ones haven't been implemented yet. */
5823
5824 (*_bfd_error_handler)
5825 (_("%s: Relocation %s is not supported for symbol %s."),
5826 bfd_archive_filename (input_bfd),
5827 ppc64_elf_howto_table[(int) r_type]->name, sym_name);
5828
5829 bfd_set_error (bfd_error_invalid_operation);
5830 ret = false;
5831 continue;
5832 }
5833
5834 /* Do any further special processing. */
5835 switch (r_type)
5836 {
5837 default:
5838 break;
5839
5840 case R_PPC64_ADDR16_HA:
5841 case R_PPC64_ADDR16_HIGHERA:
5842 case R_PPC64_ADDR16_HIGHESTA:
5843 case R_PPC64_PLT16_HA:
5844 case R_PPC64_TOC16_HA:
5845 case R_PPC64_SECTOFF_HA:
5846 /* It's just possible that this symbol is a weak symbol
5847 that's not actually defined anywhere. In that case,
5848 'sec' would be NULL, and we should leave the symbol
5849 alone (it will be set to zero elsewhere in the link). */
5850 if (sec != NULL)
5851 /* Add 0x10000 if sign bit in 0:15 is set. */
5852 addend += ((relocation + addend) & 0x8000) << 1;
5853 break;
5854
5855 case R_PPC64_ADDR16_DS:
5856 case R_PPC64_ADDR16_LO_DS:
5857 case R_PPC64_GOT16_DS:
5858 case R_PPC64_GOT16_LO_DS:
5859 case R_PPC64_PLT16_LO_DS:
5860 case R_PPC64_SECTOFF_DS:
5861 case R_PPC64_SECTOFF_LO_DS:
5862 case R_PPC64_TOC16_DS:
5863 case R_PPC64_TOC16_LO_DS:
5864 case R_PPC64_PLTGOT16_DS:
5865 case R_PPC64_PLTGOT16_LO_DS:
5866 if (((relocation + addend) & 3) != 0)
5867 {
5868 (*_bfd_error_handler)
5869 (_("%s: error: relocation %s not a multiple of 4"),
5870 bfd_archive_filename (input_bfd),
5871 ppc64_elf_howto_table[(int) r_type]->name);
5872 bfd_set_error (bfd_error_bad_value);
5873 ret = false;
5874 continue;
5875 }
5876 break;
5877
5878 case R_PPC64_REL14:
5879 case R_PPC64_REL14_BRNTAKEN:
5880 case R_PPC64_REL14_BRTAKEN:
5881 max_br_offset = 1 << 15;
5882 goto branch_check;
5883
5884 case R_PPC64_REL24:
5885 max_br_offset = 1 << 25;
5886
5887 branch_check:
5888 /* If the branch is out of reach, then redirect the
5889 call to the local stub for this function. */
5890 from = (offset
5891 + input_section->output_offset
5892 + input_section->output_section->vma);
5893 if (relocation + addend - from + max_br_offset >= 2 * max_br_offset
5894 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
5895 rel, htab)) != NULL)
5896 {
5897 /* Munge up the value and addend so that we call the stub
5898 rather than the procedure directly. */
5899 relocation = (stub_entry->stub_offset
5900 + stub_entry->stub_sec->output_offset
5901 + stub_entry->stub_sec->output_section->vma);
5902 addend = 0;
5903 }
5904 break;
5905 }
5906
5907 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5908 because such sections are not SEC_ALLOC and thus ld.so will
5909 not process them. */
5910 if (unresolved_reloc
5911 && !((input_section->flags & SEC_DEBUGGING) != 0
5912 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
5913 {
5914 (*_bfd_error_handler)
5915 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
5916 bfd_archive_filename (input_bfd),
5917 bfd_get_section_name (input_bfd, input_section),
5918 (long) rel->r_offset,
5919 h->root.root.string);
5920 ret = false;
5921 }
5922
5923 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
5924 input_bfd,
5925 input_section,
5926 contents,
5927 offset,
5928 relocation,
5929 addend);
5930
5931 if (r != bfd_reloc_ok)
5932 {
5933 const char *name;
5934
5935 if (h != NULL)
5936 {
5937 if (h->root.type == bfd_link_hash_undefweak
5938 && ppc64_elf_howto_table[(int) r_type]->pc_relative)
5939 {
5940 /* Assume this is a call protected by other code that
5941 detects the symbol is undefined. If this is the case,
5942 we can safely ignore the overflow. If not, the
5943 program is hosed anyway, and a little warning isn't
5944 going to help. */
5945
5946 continue;
5947 }
5948
5949 name = h->root.root.string;
5950 }
5951 else
5952 {
5953 name = bfd_elf_string_from_elf_section (input_bfd,
5954 symtab_hdr->sh_link,
5955 sym->st_name);
5956 if (name == NULL)
5957 continue;
5958 if (*name == '\0')
5959 name = bfd_section_name (input_bfd, sec);
5960 }
5961
5962 if (r == bfd_reloc_overflow)
5963 {
5964 if (warned)
5965 continue;
5966 if (!((*info->callbacks->reloc_overflow)
5967 (info, name, ppc64_elf_howto_table[(int) r_type]->name,
5968 rel->r_addend, input_bfd, input_section, offset)))
5969 return false;
5970 }
5971 else
5972 {
5973 (*_bfd_error_handler)
5974 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
5975 bfd_archive_filename (input_bfd),
5976 bfd_get_section_name (input_bfd, input_section),
5977 (long) rel->r_offset, name, (int) r);
5978 ret = false;
5979 }
5980 }
5981 }
5982
5983 return ret;
5984 }
5985
5986 /* Finish up dynamic symbol handling. We set the contents of various
5987 dynamic sections here. */
5988
5989 static boolean
5990 ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
5991 bfd *output_bfd;
5992 struct bfd_link_info *info;
5993 struct elf_link_hash_entry *h;
5994 Elf_Internal_Sym *sym;
5995 {
5996 struct ppc_link_hash_table *htab;
5997 bfd *dynobj;
5998
5999 htab = ppc_hash_table (info);
6000 dynobj = htab->elf.dynobj;
6001
6002 if (h->plt.offset != (bfd_vma) -1
6003 && ((struct ppc_link_hash_entry *) h)->is_func_descriptor)
6004 {
6005 Elf_Internal_Rela rela;
6006 Elf64_External_Rela *loc;
6007
6008 /* This symbol has an entry in the procedure linkage table. Set
6009 it up. */
6010
6011 if (htab->splt == NULL
6012 || htab->srelplt == NULL
6013 || htab->sglink == NULL)
6014 abort ();
6015
6016 /* Create a JMP_SLOT reloc to inform the dynamic linker to
6017 fill in the PLT entry. */
6018
6019 rela.r_offset = (htab->splt->output_section->vma
6020 + htab->splt->output_offset
6021 + h->plt.offset);
6022 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
6023 rela.r_addend = 0;
6024
6025 loc = (Elf64_External_Rela *) htab->srelplt->contents;
6026 loc += (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
6027 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
6028 }
6029
6030 if (h->got.offset != (bfd_vma) -1)
6031 {
6032 Elf_Internal_Rela rela;
6033 Elf64_External_Rela *loc;
6034
6035 /* This symbol has an entry in the global offset table. Set it
6036 up. */
6037
6038 if (htab->sgot == NULL || htab->srelgot == NULL)
6039 abort ();
6040
6041 rela.r_offset = (htab->sgot->output_section->vma
6042 + htab->sgot->output_offset
6043 + (h->got.offset &~ (bfd_vma) 1));
6044
6045 /* If this is a static link, or it is a -Bsymbolic link and the
6046 symbol is defined locally or was forced to be local because
6047 of a version file, we just want to emit a RELATIVE reloc.
6048 The entry in the global offset table will already have been
6049 initialized in the relocate_section function. */
6050 if (info->shared
6051 && (info->symbolic
6052 || h->dynindx == -1
6053 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
6054 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
6055 {
6056 BFD_ASSERT((h->got.offset & 1) != 0);
6057 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6058 rela.r_addend = (h->root.u.def.value
6059 + h->root.u.def.section->output_section->vma
6060 + h->root.u.def.section->output_offset);
6061 }
6062 else
6063 {
6064 BFD_ASSERT ((h->got.offset & 1) == 0);
6065 bfd_put_64 (output_bfd, (bfd_vma) 0,
6066 htab->sgot->contents + h->got.offset);
6067 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_GLOB_DAT);
6068 rela.r_addend = 0;
6069 }
6070
6071 loc = (Elf64_External_Rela *) htab->srelgot->contents;
6072 loc += htab->srelgot->reloc_count++;
6073 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
6074 }
6075
6076 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
6077 {
6078 Elf_Internal_Rela rela;
6079 Elf64_External_Rela *loc;
6080
6081 /* This symbol needs a copy reloc. Set it up. */
6082
6083 if (h->dynindx == -1
6084 || (h->root.type != bfd_link_hash_defined
6085 && h->root.type != bfd_link_hash_defweak)
6086 || htab->srelbss == NULL)
6087 abort ();
6088
6089 rela.r_offset = (h->root.u.def.value
6090 + h->root.u.def.section->output_section->vma
6091 + h->root.u.def.section->output_offset);
6092 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
6093 rela.r_addend = 0;
6094 loc = (Elf64_External_Rela *) htab->srelbss->contents;
6095 loc += htab->srelbss->reloc_count++;
6096 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
6097 }
6098
6099 /* Mark some specially defined symbols as absolute. */
6100 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
6101 sym->st_shndx = SHN_ABS;
6102
6103 return true;
6104 }
6105
6106 /* Used to decide how to sort relocs in an optimal manner for the
6107 dynamic linker, before writing them out. */
6108
6109 static enum elf_reloc_type_class
6110 ppc64_elf_reloc_type_class (rela)
6111 const Elf_Internal_Rela *rela;
6112 {
6113 enum elf_ppc_reloc_type r_type;
6114
6115 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rela->r_info);
6116 switch (r_type)
6117 {
6118 case R_PPC64_RELATIVE:
6119 return reloc_class_relative;
6120 case R_PPC64_JMP_SLOT:
6121 return reloc_class_plt;
6122 case R_PPC64_COPY:
6123 return reloc_class_copy;
6124 default:
6125 return reloc_class_normal;
6126 }
6127 }
6128
6129 /* Finish up the dynamic sections. */
6130
6131 static boolean
6132 ppc64_elf_finish_dynamic_sections (output_bfd, info)
6133 bfd *output_bfd;
6134 struct bfd_link_info *info;
6135 {
6136 struct ppc_link_hash_table *htab;
6137 bfd *dynobj;
6138 asection *sdyn;
6139
6140 htab = ppc_hash_table (info);
6141 dynobj = htab->elf.dynobj;
6142 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
6143
6144 if (htab->elf.dynamic_sections_created)
6145 {
6146 Elf64_External_Dyn *dyncon, *dynconend;
6147
6148 if (sdyn == NULL || htab->sgot == NULL)
6149 abort ();
6150
6151 dyncon = (Elf64_External_Dyn *) sdyn->contents;
6152 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
6153 for (; dyncon < dynconend; dyncon++)
6154 {
6155 Elf_Internal_Dyn dyn;
6156 asection *s;
6157
6158 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
6159
6160 switch (dyn.d_tag)
6161 {
6162 default:
6163 continue;
6164
6165 case DT_PPC64_GLINK:
6166 dyn.d_un.d_ptr = (htab->sglink->output_section->vma
6167 + htab->sglink->output_offset);
6168 break;
6169
6170 case DT_PPC64_OPD:
6171 s = bfd_get_section_by_name (output_bfd, ".opd");
6172 if (s != NULL)
6173 dyn.d_un.d_ptr = s->vma;
6174 break;
6175
6176 case DT_PPC64_OPDSZ:
6177 s = bfd_get_section_by_name (output_bfd, ".opd");
6178 if (s != NULL)
6179 dyn.d_un.d_val = s->_raw_size;
6180 break;
6181
6182 case DT_PLTGOT:
6183 dyn.d_un.d_ptr = (htab->splt->output_section->vma
6184 + htab->splt->output_offset);
6185 break;
6186
6187 case DT_JMPREL:
6188 dyn.d_un.d_ptr = (htab->srelplt->output_section->vma
6189 + htab->srelplt->output_offset);
6190 break;
6191
6192 case DT_PLTRELSZ:
6193 dyn.d_un.d_val = htab->srelplt->_raw_size;
6194 break;
6195
6196 case DT_RELASZ:
6197 /* Don't count procedure linkage table relocs in the
6198 overall reloc count. */
6199 if (htab->srelplt != NULL)
6200 dyn.d_un.d_val -= htab->srelplt->_raw_size;
6201 break;
6202 }
6203
6204 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
6205 }
6206 }
6207
6208 if (htab->sgot != NULL && htab->sgot->_raw_size != 0)
6209 {
6210 /* Fill in the first entry in the global offset table.
6211 We use it to hold the link-time TOCbase. */
6212 bfd_put_64 (output_bfd,
6213 elf_gp (output_bfd) + TOC_BASE_OFF,
6214 htab->sgot->contents);
6215
6216 /* Set .got entry size. */
6217 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8;
6218 }
6219
6220 if (htab->splt != NULL && htab->splt->_raw_size != 0)
6221 {
6222 /* Set .plt entry size. */
6223 elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize
6224 = PLT_ENTRY_SIZE;
6225 }
6226
6227 return true;
6228 }
6229
6230 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
6231 #define TARGET_LITTLE_NAME "elf64-powerpcle"
6232 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
6233 #define TARGET_BIG_NAME "elf64-powerpc"
6234 #define ELF_ARCH bfd_arch_powerpc
6235 #define ELF_MACHINE_CODE EM_PPC64
6236 #define ELF_MAXPAGESIZE 0x10000
6237 #define elf_info_to_howto ppc64_elf_info_to_howto
6238
6239 #ifdef EM_CYGNUS_POWERPC
6240 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6241 #endif
6242
6243 #ifdef EM_PPC_OLD
6244 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6245 #endif
6246
6247 #define elf_backend_want_got_sym 0
6248 #define elf_backend_want_plt_sym 0
6249 #define elf_backend_plt_alignment 3
6250 #define elf_backend_plt_not_loaded 1
6251 #define elf_backend_got_symbol_offset 0
6252 #define elf_backend_got_header_size 8
6253 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
6254 #define elf_backend_can_gc_sections 1
6255 #define elf_backend_can_refcount 1
6256 #define elf_backend_rela_normal 1
6257
6258 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
6259 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
6260 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
6261 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
6262
6263 #define elf_backend_object_p ppc64_elf_object_p
6264 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
6265 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
6266 #define elf_backend_check_relocs ppc64_elf_check_relocs
6267 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
6268 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
6269 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
6270 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
6271 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
6272 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
6273 #define elf_backend_relocate_section ppc64_elf_relocate_section
6274 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
6275 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
6276 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
6277
6278 #include "elf64-target.h"
GDB Binutils - Deliverables
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